NZ787366A - Antisense oligomers and methods of using the same for treating diseases associated - Google Patents

Abstract

The present disclosure relates to modified antisense oligonucleotides. The nucleotides described herein are of 10 to 40 nucleobases and include a targeting sequence complementary to a target region within intron 1 of a pre-mRNA of the human alpha glucosidase (GAA) gene. The target region includes at least one additional nucleobase compared to the targeting sequence, wherein the at least one additional nucleobase has no complementary nucleobase in the targeting sequence, and wherein the at least one additional nucleobase is internal to the target region.

Description

ANTISENSE OLIGOMERS AND METHODS OF USING THE SAME FOR TREATING DISEASES ASSOCIATED WITH THE ACID ALPHA-GLUCOSIDASE GENE This is a divisional of New Zealand patent application No. 747165, the entire contents of which are incorporated herein by reference.

Field of the Disclosure The present disclosure relates to antisense oligomers and related compositions and methods for inducing exon inclusion as a treatment for glycogen storage disease type II (GSD- II) (also known as Pompe disease, glycogenosis II, acid maltase deficiency (AMD), acid alphaglucosidase ency, and lysosomal alpha-glucosidase deficiency), and more specifically relates to inducing inclusion of exon 2 and thereby restoring levels of enzymatically active acid alpha-glucosidase (GAA) protein encoded by the GAA gene.

Description of the d Art Alternative splicing increases the coding potential of the human genome by producing multiple proteins from a single gene. Inappropriate alternative splicing is also associated with a growing number of human diseases.

GSD-II is an inherited autosomal recessive lysosomal storage er caused by ency of an enzyme called acid alpha-glucosidase (GAA). The role of GAA within the body is to break down glycogen. Reduced or absent levels of GAA activity leads to the accumulation of glycogen in the ed tissues, including the heart, skeletal muscles (including those involved with breathing), liver, and s . This lation of glycogen is believed to cause progressive muscle ss and respiratory insufficiency in duals with GSD-II.

GSD-II can occur in infants, toddlers, or adults, and the prognosis varies according to the time of onset and severity of symptoms. Clinically, GSD-II may manifest with a broad and uous spectrum of severity ranging from severe (infantile) to milder late onset adult form. The patients eventually die due to respiratory insufficiency. There is a good correlation between the severity of the disease and the residual acid alpha-glucosidase activity, the activity being 10-20% of normal in late onset and less than 2% in early onset forms of the disease. It is ted that GSD-II affects approximately 5,000 to 10,000 people ide.

The most common mutation associated with the adult onset form of disease is IVS1- 13T>G. Found in over two thirds of adult onset GSD-II patients, this mutation may confer a selective advantage in heterozygous individuals or is a very old mutation. The wide ethnic variation of adult onset GSD-II individuals with this mutation argues against a common founder.

The GAA gene ts of 20 exons spanning some 20kb. The 3.4 kb mRNA encodes a protein with a molecular weight of approximately 105kD. The IVS1-13T>G mutation leads to the loss of exon 2 (577 bases) which contains the initiation AUG codon.

Treatment for GSD-II has involved drug treatment strategies, dietary lations, and bone marrow transplantation without significant success. In recent years, enzyme ement therapy (ERT) has provided new hope for GSD-II ts. For example, Myozyme®, a recombinant GAA protein drug, received approval for use in ts with GSD-II disease in 2006 in both the U.S. and Europe. e® depends on mannosephosphates (M6P) on the surface of the GAA n for delivery to lysosomes.

Antisense technology, used mostly for RNA down regulation, recently has been adapted to alter the splicing process. Processing the primary gene transcripts (pre-mRNA) of many genes involves the removal of introns and the precise splicing of exons where a donor splice site is joined to an acceptor splice site. Splicing is a precise process, involving the coordinated recognition of donor and acceptor splice sites, and the branch point (upstream of the acceptor splice site) with a balance of positive exon splice enhancers (predominantly located within the exon) and negative splice motifs (splice silencers are located predominantly in the introns).

Effective agents that can alter splicing of GAA NAs are likely to be useful therapeutically for improved ent of GSD-II.

Y In one aspect, the disclosure features a modified antisense oligonucleotide of 10 to 40 nucleobases. The modified antisense oligonucleotide includes a ing sequence complementary to a target region within the pre-mRNA of the human alpha glucosidase (GAA) gene (e.g., within intron 1 of GAA, such as a target region within SEQ ID NO:1), wherein the target region comprises at least one additional nucleobase compared to the targeting sequence, wherein the at least one additional nucleobase has no mentary nucleobase in the targeting sequence, and wherein the at least one onal nucleobase is internal to the target region. The interaction between the targeting region and the targeting sequence may otherwise be 100% complementarity but may also include lower thresholds of complementarity (e.g., 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%). The target region may include at least one of SEQ ID NO: 2 or SEQ ID NO: 3.

Optionally, the target region may include SEQ ID NO: 4. Optionally, the target region may include SEQ ID NO: 5. The modified antisense oligonucleotide may promote retention of exon 2 in the GAA mRNA upon binding of the targeting sequence to the target . The target region may include from one to three additional nucleobases compared to the targeting ce. However, more than three additional bases can also be present in the target region. Further, the additional nucleobases can be separated from each other along the target region. The modified antisense oligonucleotide may induce GAA enzyme activity at least two fold ing to an enzyme activity test as compared to a second antisense oligonucleotide that is fully complementary to the target region within SEQ ID NO: 1. The modified antisense oligonucleotide may induce GAA enzyme activity at least three fold or at least four fold according to an enzyme activity test as compared to a second antisense oligonucleotide that is fully complementary to the target region within SEQ ID NO: 1.

In another aspect, the disclosure features an antisense oligomer compound of formula (I): or a pharmaceutically acceptable salt thereof, n: each Nu is a nucleobase which taken together form a targeting sequence; Z is an integer from 8 to 38; each Y is independently ed from O and –NR4, wherein each R4 is independently selected from H, C1-C6 alkyl, aralkyl, -C(=NH)NH2, -C(O)(CH2)nNR5C(=NH)NH2, -C(O)(CH2)2NHC(O)(CH2)5NR5C(=NH)NH2, and G, wherein R5 is ed from H and C1-C6 alkyl and n is an integer from 1 to 5; T is selected from OH and a moiety of the formula: wherein: A is selected from –OH, -N(R7)2, and R1 wherein each R7 is independently selected from H and C1-C6 alkyl, and R6 is selected from OH, –N(R9)CH2C(O)NH2, and a moiety of the formula: wherein: R9 is selected from H and C1-C6 alkyl; and R10 is selected from G, -C(O)-R11OH, acyl, trityl, 4-methoxytrityl, )NH2, -C(O)(CH2)mNR12C(=NH)NH2, and -C(O)(CH2)2NHC(O)(CH2)5NR12C(=NH)NH2, wherein: m is an integer from 1 to 5, R11 is of the formula -(O-alkyl)y- wherein y is an integer from 3 to and each of the y alkyl groups is independently selected from C2-C6 alkyl; and R12 is selected from H and C1-C6 alkyl; each instance of R1 is independently ed from : –N(R13)2, wherein each R13 is independently ed from H and C1-C6 alkyl; a moiety of formula (II): wherein: R15 is ed from H, G, C1-C6 alkyl, -C(=NH)NH2, -C(O)(CH2)qNR18C(=NH)NH2, and -C(O)(CH2)2NHC(O)(CH2)5NR18C(=NH)NH2, wherein: R18 is selected from H and C1-C6 alkyl; and q is an r from 1 to 5, and each R17 is independently selected from H and methyl; and a moiety of formula(III): R19 is selected from H, C1-C6 alkyl, -C(=NH)NH2, -C(O)(CH2)rNR22C(=NH)NH2, -C(O)CH(NH2)(CH2)3NHC(=NH)NH2, -C(O)(CH2)2NHC(O)(CH2)5NR22C(=NH)NH2, -C(O)CH(NH2)(CH2)4NH2 and G, wherein: R22 is selected from H and C1-C6 alkyl; and r is an integer from 1 to 5, and R20 is ed from H and C1-C6 alkyl; or R19 and R20 together with the nitrogen atom to which they are attached form a heterocyclic or heteroaryl ring having from 5 to 7 ring atoms and optionally containing an additional heteroatom selected from oxygen, nitrogen, and sulfur; and R2 is selected from H, G, acyl, trityl, 4-methoxytrityl, benzoyl, stearoyl, C1-C6 alkyl, -C(=NH)NH2, -C(O)-R23, -C(O)(CH2)sNR24C(=NH)NH2, -C(O)(CH2)2NHC(O)(CH2)5NR24C(=NH)NH2, -C(O)CH(NH2)(CH2)3NHC(=NH)NH2, and a moiety of the a: wherein, R23 is of the a -(O-alkyl)v-OH wherein v is an integer from 3 to 10 and each of the v alkyl groups is independently selected from C2-C6 alkyl; R24 is selected from H and C1-C6 alkyl; s is an integer from 1 to 5; L is selected from –C(O)(CH2)6C(O)– and -C(O)(CH2)2S2(CH2)2C(O)–; each R25 is of the formula 2OC(O)N(R26)2 wherein each R26 is of the formula –(CH2)6NHC(=NH)NH2, wherein G is a cell penetrating e ("CPP") and linker moiety selected from -C(O)(CH2)5NH-CPP, -C(O)(CH2)2NH-CPP, -C(O)(CH2)2NHC(O)(CH2)5NH-CPP, -C(O)CH2NH-CPP, and: wherein the CPP is attached to the linker moiety by an amide bond at the CPP y terminus, and wherein G may be present in one occurance or is absent.

In certain embodiments, each R1 is -N(CH3)2. In some embodiments, about 50 -90% of the R1 groups are dimethylamino (i.e. -N(CH3)2). In certain embodiments, about 66% of the R1 groups are dimethylamino.

In some non-limiting embodiments, the targeting sequence is selected from the sequences of Tables 2A-2C, wherein X is selected from uracil (U) or thymine (T). In some nonlimiting embodiments, each R1 is -N(CH3)2 and the targeting sequence is selected from the sequences of Table 2A-2C, n X is selected from uracil (U) or thymine (T).

In some ments of the disclosure, R1 may be selected from: In n embodiments, T is selected from: ; ; ; and , and Y is O at each occurrence. In some embodiments, R2 is selected from H, G, acyl, trityl, 4-methoxytrityl, benzoyl, and stearoyl.

In certain embodiments, T is of the formula: Y is O at each occurrence and R2 is G.

In certain embodiments, T is of the a: and Y is O at each occurrence.

In certain embodiments, T is of the formula: , Y is O at each occurrence, each R1 is –N(CH3)2, and R2 is H.

In another aspect, the disclosure features an antisense er compound of formula (VII): or a pharmaceutically acceptable salt thereof, where each Nu is a nucleobase which taken together forms a targeting ce; Z is an integer from 8 to 38; T is selected from: ; ; ; and ; each R1 is –N(R4)2 wherein each R4 is ndently C1-C6 alkyl; and R2 is selected from H, G, acyl, trityl, 4-methoxytrityl, benzoyl, and stearoyl, wherein G is a cell penetrating peptide ("CPP") and linker moiety selected from -C(O)(CH2)5NH-CPP, -C(O)(CH2)2NH-CPP, -C(O)(CH2)2NHC(O)(CH2)5NH-CPP, -C(O)CH2NH-CPP, and: wherein the CPP is attached to the linker moiety by an amide bond at the CPP carboxy terminus, and wherein T is or R2 is G.

In some embodiments, the targeting sequence of an antisense oligomer of the disclosure including, for example, some embodiments of the antisense oligomers of formula (I) and (IV), is selected from the sequences outlined in Tables 2A-2C, as described herein, and as follows: a) SEQ ID NO: 13 (GGC CAG AAG GAA GGC GAG AAA AGC) wherein Z is 22; b) SEQ ID NO: 14 (GCC AGA AGG AAG GC GAG AAA AGC X) wherein Z is 22; c) SEQ ID NO: 15 (CCA GAA GGA AGG CGA GAA AAG CXC) n Z is 22; d) SEQ ID NO: 16 (CAG AAG GAA GGC GAG AAA AGC XCC) wherein Z is 22; e) SEQ ID NO: 17 (AGA AGG AAG GCG AGA AAA GCX CCA) n Z is 22; f) SEQ ID NO: 18 (GAA GGA AGG CGA GAA AAG CXC CAG) n Z is 22; g) SEQ ID NO: 19 (AAG GAA GGC GAG AAA AGC XCC AGC) wherein Z is 22; h) SEQ ID NO: 20 (AGG AAG GCG AGA AAA GCX CCA GCA) wherein Z is 22; i) SEQ ID NO: 21 (CGG CXC XCA AAG CAG CXC XGA GA) wherein Z is 21; j) SEQ ID NO: 22 (ACG GCX CXC AAA GCA GCX CXG AG) wherein Z is 21; k) SEQ ID NO: 23 (CAC GGC XCX CAA AGC AGC XCX GA) wherein Z is 21; l) SEQ ID NO: 24 (XCA CGG CXC XCA AAG CAG CXC XG) wherein Z is 21; m) SEQ ID NO: 25 (CXC ACG GCX CXC AAA GCA GCX CX) wherein Z is 21; n) SEQ ID NO: 26 (ACX CAC GGC XCX CAA AGC AGC XC) wherein Z is 21; o) SEQ ID NO: 27 (GCG GCA CXC ACG GCX CXC AAA GC) wherein Z is 21; p) SEQ ID NO: 28 (GGC GGC ACX CAC GGC XCX CAA AG) n Z is 21; q) SEQ ID NO: 29 (CGG CAC XCA CGG CXC XCA AAG CA) wherein Z is 21; r) SEQ ID NO: 30 (GCA CXC ACG GCX CXC AAA GCA GC) wherein Z is 21; s) SEQ ID NO: 31 (GGC ACX CAC GGC XCX CAA AGC AG) wherein Z is 21; t) SEQ ID NO: 32 (CAC XCA CGG CXC XCA AAG CAG CX) wherein Z is 21; u) SEQ ID NO: 33 (GCC AGA AGG AAG GCG AGA AAA GC) wherein Z is 21; v) SEQ ID NO: 34 (CCA GAA GGA AGG CGA GAA AAG C) wherein Z is 19; w) SEQ ID NO: 35 (CAG AAG GAA GGC GAG AAA AGC) wherein Z is 19; x) SEQ ID NO: 36 (GGC CAG AAG GAA GGC GAG AAA AG) n Z is 21; y) SEQ ID NO: 37 (GGC CAG AAG GAA GGC GAG AAA A) wherein Z is 19; z) SEQ ID NO: 38 (GGC CAG AAG GAA GGC GAG AAA) wherein Z is 19; aa) SEQ ID NO: 39 (CGG CAC XCA CGGC XCX CAA AGC A) wherein Z is 21; bb) SEQ ID NO: 40 (GCG GCA CXC ACGG CXC XCA AAG C) wherein Z is 21; cc) SEQ ID NO: 41 (GGC GGC ACX CAC G GCX CXC AAA G) wherein Z is 21; dd) SEQ ID NO: 42 (XGG GGA GAG GGC CAG AAG GAA GGC) wherein Z is 22; ee) SEQ ID NO: 43 (XGG GGA GAG GGC CAG AAG GAA GC) n Z is 21; ff) SEQ ID NO: 44 (XGG GGA GAG GGC CAG AAG GAA C) wherein Z is 20; gg) SEQ ID NO: 45 (GGC CAG AAG GAA GCG AGA AAA GC) wherein Z is 21; hh) SEQ ID NO: 46 (GGC CAG AAG GAA CGA GAA AAG C) wherein Z is 20; ii) SEQ ID NO: 47 (AGG AAG CGA GAA AAG CXC CAG CA) wherein Z is 21; jj) SEQ ID NO: 48 (AGG AAC GAG AAA AGC XCC AGC A) wherein Z is 20; kk) SEQ ID NO: 49 (CGG GCX CXC AAA GCA GCX CXG AGA) wherein Z is 22; ll) SEQ ID NO: 50 (CGC XCX CAA AGC AGC XCX GAG A) wherein Z is 20; mm) SEQ ID NO: 51 (CCX CXC AAA GCA GCX CXG AGA) wherein Z is 19; nn) SEQ ID NO: 52 (GGC GGC ACX CAC GGG CXC XCA AAG) wherein Z is 22; oo) SEQ ID NO: 53 (GGC GGC ACX CAC GCX CXC AAA G) n Z is 20; pp) SEQ ID NO: 54 (GGC GGC ACX CAC CXC XCA AAG) wherein Z is 19; qq) SEQ ID NO: 55 (GCG GGA GGG GCG GCA CXC ACG GGC) wherein Z is 22; rr) SEQ ID NO: 56 (GCG GGA GGG GCG GCA CXC ACG GC) wherein Z is 21; ss) SEQ ID NO: 57 (GCG GGA GGG GCG GCA CXC ACG C) wherein Z is 20; and tt) SEQ ID NO: 58 (GCG GGA GGG GCG GCA CXC ACC) wherein Z is 19, wherein X is selected from uracil (U) or thymine (T); II. a) SEQ ID NO: 59 (GGC CAG AAG GAA GGG CGA GAA AAG C) wherein Z is 23; b) SEQ ID NO: 60 (CCA GAA GGA AGG GCG AGA AAA GCX C) wherein Z is 23; c) SEQ ID NO: 61 (AAG GAA GGG CGA GAA AAG CXC CAG C) wherein Z is 23; d) SEQ ID NO: 62 (GCG GGA GGG GCG GCA CXC ACG GGG C) wherein Z is 23; e) SEQ ID NO: 63 (XGG GGA GAG GGC CAG AAG GAA GGG C) wherein Z is 23; f) SEQ ID NO: 64 (AGA AGG AAG GGC GAG AAA AGC XCC A) wherein Z is 23; g) SEQ ID NO: 65 (GCX CXC AAA GCA GCX CXG AGA CAX C) wherein Z is 23; h) SEQ ID NO: 66 (CXC XCA AAG CAG CXC XGA GAC AXC A) wherein Z is 23; i) SEQ ID NO: 67 (XCX CAA AGC AGC XCX GAG ACA XCA A) wherein Z is 23; j) SEQ ID NO: 68 (CXC AAA GCA GCX CXG AGA CAX CAA C) wherein Z is 23; k) SEQ ID NO: 69 (XCA AAG CAG CXC XGA GAC AXC AAC C) wherein Z is 23; l) SEQ ID NO: 70 (CAA AGC AGC XCX GAG ACA XCA ACC G) wherein Z is 23; m) SEQ ID NO: 71 (AAA GCA GCX CXG AGA CAX CAA CCG C) wherein Z is 23; n) SEQ ID NO: 72 (AAG CAG CXC XGA GAC AXC AAC CGC G) wherein Z is 23; o) SEQ ID NO: 73 (AGC AGC XCX GAG ACA XCA ACC GCG G) wherein Z is 23; p) SEQ ID NO: 74 (GCA GCX CXG AGA CAX CAA CCG CGG C) wherein Z is 23; and q) SEQ ID NO: 75 (CAG CXC XGA GAC AXC AAC CGC GGC X) wherein Z is 23, n X is selected from uracil (U) or thymine (T); and III. a) SEQ ID NO: 76 (GCC AGA AGG AAG GGC GAG AAA AGC X) wherein Z is 23; b) SEQ ID NO: 77 (CAG AAG GAA GGG CGA GAA AAG CXC C) wherein Z is 23; c) SEQ ID NO: 78 (GAA GGA AGG GCG AGA AAA GCX CCA G) wherein Z is 23; d) SEQ ID NO: 79 (AGG AAG GGC GAG AAA AGC XCC AGC A) wherein Z is 23; e) SEQ ID NO: 80 (ACX CAC GGG GCX CXC AAA GCA GCX C) n Z is 23; f) SEQ ID NO: 81 (GGCXCXCAAAGCAGCXCXGAGACAX) wherein Z is 23; g) SEQ ID NO: 82 (GGC XCX CAA AGC AGC XCX GA) wherein Z is 18; h) SEQ ID NO: 83 (GAG AGG GCC AGA AGG AAG GG) n Z is 18; i) SEQ ID NO: 84 (XXX GCC AXG XXA CCC AGG CX) wherein Z is 18; j) SEQ ID NO: 85 (GCG CAC CCX CXG CCC XGG CC) wherein Z is 18; and k) SEQ ID NO: 86 (GGC CCX GGX CXG CXG GCX CCC XGC X) wherein Z is 23, wherein X is selected from uracil (U) or thymine (T).

In certain embodiments, the targeting ce is selected from the group consisting of SEQ ID NOs: 13, 27-29, 34-36, 59, and 82. In certain embodiments, the targeting sequence is selected from the group consisting of SEQ ID NOs: 13, 27-29, 34-36, and 59. In certain embodiments, the targeting sequence is selected from the group consisting of SEQ ID NOs: 13, 27-29, and 34-36. In certain embodiments, each instance of X in any one of SEQ ID NOs: 13, 27- 29, 34-36, 59, and 82 is T.

In some embodiments including, for example, some embodiments of the antisense oligomers of formula (I) and (IV), the targeting sequence is complementary to a target region within intron 1 (SEQ ID NO: 1) of a pre-mRNA of the human alpha glucosidase (GAA) gene. In some embodiments, the targetring sequence is complementary to a target region in exon 2 or intron 2 of the human GAA gene. In various embodiments including, for example, embodiments of the antisense oligomers of formula (I) and (IV), the targeting ce is complementary to a target region within intron 1 (SEQ ID NO: 1) of a pre-mRNA of the human alpha glucosidase (GAA) gene, wherein the target region comprises at least one additional base compared to the targeting sequence, wherein the at least one additional nucleobase has no complementary nucleobase in the ing sequence, and wherein the at least one additional nucleobase is internal to the target region. In certain embodiments, the targeting sequence comprises a sequence selected from SEQ ID NOs:13-86, as shown in Tables 2A-2C herein. In n embodiments, the targeting sequence comprises a sequence ed from Tables 2A and 2B. In certain embodiments, the targeting sequence is selected from the group ting of SEQ ID NOs: 13, 27-29, 34-36, 59, and 82. Further, and with t to the sequences outlined in Tables 2A-2C (or Tables 2B and 2C) herein, in cetain embodiments, a ce with 100% complementarity is selected and one or more bases is removed (or ately are sized with one or more missing nucleobases) so that the resulting sequence has one or more missing bases than its natural complement in the target . With the exception of the portion where one or more nucleobases are removed, it is contemplated that the remaining portions are 100% conmplementary. However, it is within the scope of this invention that decreased levels of complementarity could be present.

In some embodiments, at least one X of SEQ ID NOS:13-86 is T. In some ments, at least one X of SEQ ID NOS: 13-86 is U. In some embodiments, each X of SEQ ID NOS: 13- 86 is T. In some embodiments, each X of SEQ ID NOS: 13-86 is U. In various ments, at least one X of the targeting sequence is T. In various embodiments, each X of the targeting sequence is T. In various embodiments, at least one X of the targeting sequence is U. In various embodiments, each X of the ing sequence is U.

These and other aspects of the present disclosure will become apparent upon reference to the following detailed description and attached drawings. All references disclosed herein are hereby incorporated by reference in their entirety as if each was incorporated individually.

BRIEF DESCRIPTION OF THE DRAWINGS Figures 1 and 2 are bar graphs depicting GAA enzyme activity (Enzyme Assay) found for various PMO compounds during screening. The Y axis represents fold increase in GAA enzyme activity relative to unreated control. "N" refers to the number of replicates evaluated in each study. The horizontal hashed line signifies the level of GAA activity in untreated cells.

Individual compounds were dosed at 5 M and 0.2 M. The ntal hashed line signifies the level of GAA activity in untreated cells.

Figures 3 and 4 are bar graphs depicting the Enzyme Assay Dose Response found for various PMO compounds. The Y axis represents fold increase in GAA enzyme activity relative to untreated control. Individual compounds were dosed at 5 M, 1 M, 0.2 M and 0.4 M.

The ntal hashed line signifies the level of GAA activity in untreated cells.

Figures 5-8 are bar graphs depicting the Enzyme Assay Dose Response found for various PMO compounds. The Y axis represents fold increase in GAA enzyme activity relative to untreated control. Individual compounds were dosed at 5 M, 1 M, 0.2 M and 0.04 M.

The horizontal hashed line ies the level of GAA activity in untreated cells.

Figures 9-14 are bar graphs depicting the Enzyme Assay Dose Response found for various PMO compounds. The Y axis represents fold increase in GAA enzyme activity relative to untreated control. Individual nds were dosed at 5 M, 1.6 M, 0.5 M and 0.16 M.

The horizontal hashed line signifies the level of GAA activity in untreated cells.

Figures 15a and 15b are bar graphs depicting the Enzyme Assay Dose Response found for various PPMO compounds. The Y axis represents fold increase in GAA enzyme activity relative to untreated control. Individual compounds were dosed at 5 M, 1.6 M, and 0.5 M.

The horizontal hashed line signifies the level of GAA ty in untreated cells.

Figure 16 is a bar graph depicting the the Enzyme Assay Dose se found for various PMO compounds. The Y axis represents fold se in GAA enzyme activity relative to untreated l. Individual compounds were dosed at 5 M. The ntal hashed line signifies the level of GAA activity in untreated cells.

Figures 17 and 18 are bar graphs depicting GAA enzyme activity (Enzyme Assay) found for various PPMO nds. The Y axis represents fold increase in GAA enzyme activity relative to unreated control. Individual compounds were dosed at 5 M, 1.6 M, and 0.5 M. The horizontal hashed line signifies the level of GAA activity in untreated cells. "N=9" refers to the number of replicates evaluated in each study. The data summary tables show EC50 in M.

Figure 19 is a data summary table ing the EC50 (in M) for various PPMO compounds.

Figure 20-22 are bar graphs depicting GAA enzyme activity (Enzyme Assay) found for various PPMO compounds. The Y axis represents fold increase in GAA enzyme activity relative to unreated control. Individual compounds were dosed at 5 M, 1.6 M, and 0.5 M.

The horizontal hashed line signifies the level of GAA activity in untreated cells. The data summary tables show EC50 in M Figure 23 is a data summary table depicting the EC50 (in M) for various PPMO compounds.

Figures 24-26 are bar graphs depicting GAA enzyme activity (Enzyme Assay) found for various PPMO compounds. The Y axis ents fold increase in GAA enzyme activity relative to unreated l. Individual compounds were dosed at 5 M, 1.6 M, and 0.5 M.

The horizontal hashed line signifies the level of GAA activity in untreated cells. The data summary tables show EC50 in M.

DETAILED DESCRIPTION I. Definitions Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the disclosure belongs. Although any s and materials similar or equivalent to those described herein can be used in the ce or testing of the subject matter of the present disclosure, preferred methods and als are bed. For the purposes of the present disclosure, the following terms are defined below.

The articles "a" and "an" are used herein to refer to one or to more than one (i.e., to at least one) of the grammatical object of the article. By way of example, "an element" means one element or more than one element.

By "about" is meant a quantity, level, value, number, frequency, percentage, ion, size, amount, weight or length that varies by as much as 30, 25, 20, 15, 10, 9, 8, 7, 6, 5, 4, 3, 2 or 1% to a reference quantity, level, value, number, frequency, percentage, dimension, size, amount, weight or length.

By "coding ce" is meant any nucleic acid sequence that contributes to the code for the polypeptide product of a gene. By contrast, the term "non-coding sequence" refers to any nucleic acid ce that does not directly contribute to the code for the polypeptide product of a gene.

Throughout this disclosure, unless the context requires otherwise, the words "comprise," "comprises," and "comprising" will be understood to imply the inclusion of a stated step or element or group of steps or ts but not the exclusion of any other step or element or group of steps or elements.

By "consisting of" is meant including, and limited to, er follows the phrase "consisting of:" Thus, the phrase "consisting of" indicates that the listed elements are required or mandatory, and that no other elements may be present. By "consisting essentially of" is meant including any elements listed after the phrase, and limited to other elements that do not interfere with or contribute to the activity or action specified in the disclosure for the listed elements.

Thus, the phrase "consisting essentially of" indicates that the listed elements are required or mandatory, but that other ts are optional and may or may not be present depending upon whether or not they materially affect the activity or action of the listed elements.

As used , the terms "contacting a cell", "introducing" or "delivering" include delivery of the oligomers of the disclosure into a cell by methods routine in the art, e.g., transfection (e.g., liposome, calcium-phosphate, polyethyleneimine), electroporation (e.g., nucleofection), njection).

As used herein, the term "alkyl" is intended to include linear (i.e., unbranched or acyclic), branched, cyclic, or polycyclic non ic hydrocarbon groups, which are optionally tuted with one or more functional groups. Unless ise specified, " groups contain one to eight, and preferably one to six carbon atoms. C1-C6 alkyl, is intended to include C1, C2, C3, C4, C5, and C6 alkyl groups. Lower alkyl refers to alkyl groups containing 1 to 6 carbon atoms. Examples of Alkyl include, but are not limited to, methyl, ethyl, yl, isopropyl, cyclopropyl, butyl, isobutyl, sec-butyl, tert-butyl, cyclobutyl, pentyl, isopentyl tert- pentyl, cyclopentyl, hexyl, isohexyl, cyclohexyl, etc. Alkyl may be substituted or unsubstituted.

Illustrative tuted alkyl groups include, but are not limited to, methyl, difluoromethyl, trifluoromethyl, 2-fluoroethyl, 3-fluoropropyl, hydroxymethyl, 2-hydroxyethyl, 3- hydroxypropyl, benzyl, substituted benzyl, phenethyl, substituted hyl, etc.

As used herein, the term "Alkoxy" means a subset of alkyl in which an alkyl group as defined above with the indicated number of s ed through an oxygen bridge. For example, y" refers to groups -O-alkyl, wherein the alkyl group contains 1 to 8 carbons atoms of a linear, branched, cyclic configuration. Examples of "alkoxy" include, but are not limited to, methoxy, ethoxy, n-propoxy, i-propoxy, t-butoxy, n-butoxy, s-pentoxy and the like.

As used herein, the term "aryl" used alone or as part of a larger moiety as in "aralkyl", "aralkoxy", or "aryloxy-alkyl", refers to aromatic ring groups having six to fourteen ring atoms, such as phenyl, 1 -naphthyl, 2-naphthyl, 1 -anthracyl and racyl. An "aryl" ring may contain one or more substituents. The term "aryl" may be used interchangeably with the term "aryl ring". "Aryl" also includes fused polycyclic aromatic ring systems in which an aromatic ring is fused to one or more rings. Non-limiting examples of useful aryl ring groups include phenyl, hydroxyphenyl, halophenyl, alkoxyphenyl, dialkoxyphenyl, trialkoxyphenyl, alkylenedioxyphenyl, naphthyl, phenanthryl, anthryl, phenanthro and the like, as well as 1 - naphthyl, 2-naphthyl, 1-anthracyl and 2-anthracyl. Also included within the scope of the term "aryl", as it is used herein, is a group in which an aromatic ring is fused to one or more nonaromatic rings, such as in a indanyl, phenanthridinyl, or ydronaphthyl, where the radical or point of ment is on the aromatic ring.

The term "acyl" means a C(O)R group (in which R signifies H, alkyl or aryl as defined above). Examples of acyl groups include formyl, acetyl, benzoyl, phenylacetyl and similar groups.

The term "homolog" as used herein means compounds ing regularly by the successive on of the same chemical group. For example, a homolog of a compound may differ by the addition of one or more -CH2- groups, amino acid residues, nucleotides, or nucleotide analogs.

The terms "cell penetrating peptide" (CPP) or "a peptide moiety which enhances cellular uptake" are used interchangeably and refer to ic cell penetrating peptides, also called "transport peptides", er peptides", or "peptide transduction domains". The es, as shown herein, have the capability of inducing cell ation within about or at least about %, 40%, 50%, 60%, 70%, 80%, 90%, or 100% of cells of a given cell culture population and allow macromolecular translocation within multiple tissues in vivo upon systemic administration. In some embodiments, the CPPs are of the formula -[(C(O)CHR'NH)m]R'' wherein R' is a side chain of a naturally occurring amino acid or a one- or two-carbon homolog thereof , R'' is selected from Hydrogen or acyl, and m is an integer up to 50. CPP’s may also have the formula -[(C(O)CHR'NH)m]Ra wherein R' is a side chain of a naturally ing amino acid or a one- or two-carbon homolog thereof, and where Ra is selected from Hydrogen, acyl, benzoyl, or stearoyl. CPPs of any structure may be linked to the 3’ or 5’ end of an antisense oligomer via a "linker" such as, for example, -C(O)(CH2)5NH-, -C(O)(CH2)2NH- , -C(O)(CH2)2NH-C(O)(CH2)5NH-, or -C(O)CH2NH-. Additional CPPs are well -known in the art and are disclosed, for example, in U.S. Application No. 016215, which is incorporated by reference in its entirety. In other ments, m is an integer selected from 1 to 50 where, when m is 1, the moiety is a single amino acid or derivative thereof.

As used herein, "amino acid" refers to a compound consisting of a carbon atom to which are attached a primary amino group, a carboxylic acid group, a side chain, and a hydrogen atom.

For e, the term "amino acid" includes, but is not limited to, Glycine, Alanine, Valine, Leucine, Isoleucine, Asparagine, Glutamine, Lysine and Arginine. Additionally, as used herein, "amino acid" also includes derivatives of amino acids such as , and amides, and salts, as well as other tives, including derivatives having pharmacoproperties upon metabolism to an active form. ingly, the term "amino acid" is understood to include naturally occurring and non-naturally occurring amino acids.

As used herein, "an electron pair" refers to a e pair of electrons that are not bonded or shared with other atoms.

As used herein, "homology" refers to the percentage number of amino acids that are identical or constitute conservative substitutions. Homology may be determined using sequence comparison programs such as GAP (Deveraux et al., 1984, Nucleic Acids Research 12, 387- 395). In this way sequences of a similar or substantially different length to those cited herein could be compared by insertion of gaps into the alignment, such gaps being determined, for example, by the comparison algorithm used by GAP.

By "isolated" is meant material that is substantially or essentially free from components that normally accompany it in its native state. For e, an "isolated polynucleotide," "isolated oligonucleotide," or "isolated oligomer" as used herein, may refer to a polynucleotide that has been ed or d from the sequences that flank it in a naturally-occurring state, e.g., a DNA fragment that is removed from the sequences that are adjacent to the fragment in the genome. The term "isolating" as it relates to cells refers to the purification of cells (e.g., fibroblasts, lymphoblasts) from a source t (e.g., a subject with a polynucleotide repeat e). In the context of mRNA or protein, "isolating" refers to the recovery of mRNA or protein from a source, e.g., cells.

The terms "modulate" includes to "increase" or "decrease" one or more quantifiable parameters, optionally by a defined and/or statistically significant amount. By "increase" or "increasing," "enhance" or "enhancing," or "stimulate" or "stimulating," refers lly to the ability of one or more antisense compounds or compositions to produce or cause a greater logical response (i.e., downstream s) in a cell or a subject relative to the response caused by either no antisense compound or a control nd. Relevant physiological or cellular responses (in vivo or in vitro) will be apparent to persons skilled in the art, and may include ses in the inclusion of exon 2 in a GAA-coding pre-mRNA, or increases in the expression of functional GAA enzyme in a cell, tissue, or subject in need thereof. An "increased" or "enhanced" amount is typically a "statistically significant" amount, and may e an increase that is 1.1, 1.2, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 30, 40, 50 or more times (e.g., 500, 1000 times), including all integers and decimal points in between and above 1 (e.g., 1.5, 1.6, 1.7. 1.8), the amount ed by no antisense compound (the absence of an agent) or a control compound. The term "reduce" or "inhibit" may relate generally to the ability of one or more antisense compounds or compositions to ase" a relevant physiological or cellular response, such as a symptom of a e or condition described herein, as measured according to routine ques in the diagnostic art. Relevant physiological or cellular responses (in vivo or in vitro) will be apparent to persons d in the art, and may include reductions in the symptoms or pathology of a glycogen storage disease such as Pompe disease, for example, a decrease in the accumulation of glycogen in one or more tissues. A ase" in a response may be "statistically significant" as compared to the response produced by no antisense compound or a control composition, and may include a 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, %, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or 100% decrease, including all integers in n.

As used herein, an "antisense oligonucleotide," "antisense oligomer" or "oligonucleotide" refers to a linear sequence of nucleotides, or nucleotide analogs, which allows the nucleobase to hybridize to a target sequence in an RNA by Watson-Crick base pairing, to form an oligomer:RNA heteroduplex within the target sequence. The terms "antisense ucleotide", "modified antisense oligonucleotide", ense oligomer", "oligomer" and "compound" may be used interchangeably to refer to an oligomer. The cyclic ts may be based on ribose or another pentose sugar or, in certain embodiments, a morpholino group (see description of morpholino ers below). Also contemplated are peptide nucleic acids (PNAs), locked nucleic acids (LNAs), tricyclo-DNA oligomers, tricyclo-phosphorothioate oligomers, and 2’-O-Methyl ers, among other antisense agents known in the art.

Included are turally-occurring oligomers, or "oligonucleotide analogs," including ers having (i) a modified backbone structure, e.g., a backbone other than the standard phosphodiester linkage found in naturally-occurring oligo- and polynucleotides, and/or (ii) modified sugar es, e.g., morpholino moieties rather than ribose or deoxyribose moieties.

Oligomer analogs support bases capable of hydrogen bonding by -Crick base g to standard polynucleotide bases, where the analog backbone presents the bases in a manner to permit such hydrogen bonding in a ce-specific fashion between the oligomer analog molecule and bases in a standard polynucleotide (e.g., single-stranded RNA or single-stranded DNA). Preferred analogs are those having a ntially uncharged, phosphorus containing backbone.

A "nuclease-resistant" oligomer refers to one whose backbone is substantially resistant to nuclease cleavage, in non-hybridized or hybridized form; by common extracellular and intracellular nucleases in the body (for example, by exonucleases such as 3’-exonucleases, endonucleases, RNase H); that is, the oligomer shows little or no nuclease cleavage under normal nuclease conditions in the body to which the oligomer is exposed. A "nuclease-resistant heteroduplex" refers to a heteroduplex formed by the binding of an antisense oligomer to its complementary , such that the heteroduplex is substantially resistant to in vivo degradation by intracellular and extracellular nucleases, which are capable of cutting double-stranded RNA/RNA or RNA/DNA complexes. A "heteroduplex" refers to a duplex between an antisense oligomer and the complementary portion of a target RNA.

As used herein, "nucleobase" (Nu), "base pairing moiety" or "base" are used hangeably to refer to a purine or pyrimidine base found in native DNA or RNA (uracil, e, adenine, cytosine, and guanine), as well as analogs of the naturally occurring purines and pyrimidines, that confer improved properties, such as g affinity to the oligomer.

Exemplary analogs include hypoxanthine (the base component of the nucleoside inosine); 2, 6- diaminopurine; 5-methyl cytosine; C5-propynyl-modifed pyrimidines; 9- (aminoethoxy)phenoxazine (G-clamp) and the like.

Further examples of base pairing moieties include, but are not d to, uracil, thymine, adenine, cytosine, guanine and hypoxanthine having their respective amino groups protected by acyl protecting groups, 2-fluorouracil, 2-fluorocytosine, 5-bromouracil, 5-iodouracil, 2,6- diaminopurine, azacytosine, dine analogs such as pseudoisocytosine and pseudouracil and other modified nucleobases such as 8-substituted purines, xanthine, or hypoxanthine (the latter two being the natural degradation products). The modified bases disclosed in Chiu and Rana, RNA, 2003, 9, 1034-1048, h et al. Nucleic Acids ch, 1994, 22, 2183-2196 and Revankar and Rao, Comprehensive Natural Products Chemistry, vol. 7, 313, are also contemplated. r examples of base pairing moieties include, but are not limited to, expanded-size nucleobases in which one or more benzene rings has been added. Nucleic base replacements described in the Glen Research catalog lenresearch.com); Krueger AT et al, Acc. Chem.

Res., 2007, 40, 141-150; Kool, ET, Acc. Chem. Res., 2002, 35, 936-943; Benner S.A., et al., Nat. Rev. Genet., 2005, 6, 553-543; Romesberg, F.E., et al., Curr. Opin. Chem. Biol., 2003, 7, 723-733; Hirao, I., Curr. Opin. Chem. Biol., 2006, 10, 7, are contemplated as useful for the synthesis of the oligomers described herein. Examples of expanded-size nucleobases are shown below: A nucleobase ntly linked to a , sugar analog or morpholino comprises a nucleoside. "Nucleotides" are composed of a nucleoside together with one phosphate group. The phosphate groups covalently link nt nucleotides to one another to form an oligomer.

An oligomer fically hybridizes" to a target polynucleotide if the er hybridizes to the target under physiological conditions, with a Tm substantially greater than 40C or 45C, preferably at least 50C, and typically 60C-80C or higher. Such hybridization preferably corresponds to stringent hybridization conditions. At a given ionic strength and pH, the Tm is the temperature at which 50% of a target ce hybridizes to a complementary polynucleotide. Such hybridization may occur with "near" or "substantial" complementarity of the antisense oligomer to the target sequence, as well as with exact complementarity.

As used herein, "sufficient length" refers to an antisense oligomer or a targeting ce thereof that is complementary to at least 8, at least 9, at least10, at least 11, at least 12, at least 13, at least 14, at least15, at 6, at least17, at least 18, at least 19, at least 20, at least 21, at least 22, at least 23, at least 24, at least 25, at least 26, at least 27, at least 28, at least 29, or at least 30 or more, such as 8-40, and such as 15-40 contiguous nucleobases in a region of GAA intron 1, exon 2, or intron 2, or a region spanning any of the ing. An antisense oligomer of sufficient length has at least a minimal number of nucleotides to be capable of specifically hybridizing to a region of the GAA pre-mRNA repeat in the mutant RNA. Preferably an oligomer of sufficient length is from 8 to 30 nucleotides in length. More preferably, an oligomer of sufficient length is from 9 to 27 nucleotides in length. Even more preferably, an oligomer of sufficient length is from 15 to 40 nucleotides in length.

The terms "sequence identity" or, for example, comprising a nce 50% identical to," as used herein, refer to the extent that sequences are identical on a nucleotide-by-nucleotide basis or an amino acid-by-amino acid basis over a window of comparison. Thus, a "percentage of sequence identity" may be calculated by comparing two optimally aligned sequences over the window of comparison, determining the number of positions at which the identical c acid base (e.g., A, T, C, G, I) or the identical amino acid residue (e.g., Ala, Pro, Ser, Thr, Gly, Val, Leu, Ile, Phe, Tyr, Trp, Lys, Arg, His, Asp, Glu, Asn, Gln, Cys and Met) occurs in both sequences to yield the number of matched ons, dividing the number of matched positions by the total number of ons in the window of comparison (i.e., the window size), and multiplying the result by 100 to yield the percentage of sequence identity. Optimal alignment of sequences for aligning a comparison window may be conducted by computerized implementations of algorithms (GAP, BESTFIT, FASTA, and TFASTA in the Wisconsin Genetics Software Package Release 7.0, Genetics Computer Group, 575 Science Drive Madison, Wis., USA) or by tion and the best alignment (i.e., resulting in the highest percentage homology over the comparison window) generated by any of the s methods selected.

Reference also may be made to the BLAST family of programs as for example disclosed by Altschul et al., Nucl. Acids Res. 25:3389, 1997.

A "subject" or a "subject in need thereof" includes a mammalian subject such as a human subject. Exemplary mammalian subjects have or are at risk for having GSD-II (or Pompe disease). As used herein, the term "GSD-II" refers to en storage disease type II (GSD-II or Pompe disease), a human autosomal recessive e that is often terized by under expression of GAA protein in affected individuals. In certain embodiments, a subject has reduced expression and/or activity of GAA protein in one or more tissues, for example, heart, skeletal muscle, liver, and nervous system tissues. In some embodiments, the subject has increased accumulation of glycogen in one or more tissues, for example, heart, skeletal , liver, and nervous system tissues. In ic embodiments, the t has a IVS1-13T>G mutation or other mutation that leads to reduced expression of functional GAA protein (see, e.g., ri et al., an J. Human Genetics. 19:422-431, 2011).

As used herein, the term t" refers to a RNA region, and ically, to a region identified by the GAA gene. In a particular embodiment the target is a region within intron 1 of the GAA-coding pre-mRNA (e.g., SEQ ID NO:1), which is sible for suppression of a signal that promotes exon 2 inclusion. In another embodiment the target region is a region of the mRNA of GAA exon 2. In a further embodiment, the target comprises one or more discrete subregions of intron 1 of the GAA-coding pre-mRNA. These subregions e, but are not limited to, the sequences defined by SEQ ID NO: 2 and SEQ ID NO: 3.

The term "target sequence" refers to a portion of the target RNA against which the oligomer analog is directed, that is, the ce to which the oligomer analog will hybridize by Watson-Crick base pairing of a complementary sequence.

The term "targeting sequence" is the sequence in the oligomer or oligomer analog that is complementary (meaning, in addition, substantially complementary) to the "target sequence" in the RNA genome. The entire sequence, or only a portion, of the antisense oligomer may be mentary to the target sequence. For example, in an oligomer having 20-30 bases, about 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, or 29 may be targeting sequences that are complementary to the target region. Typically, the targeting ce is formed of contiguous bases in the oligomer, but may alternatively be formed of non- contiguous sequences that when placed together, e.g., from opposite ends of the oligomer, constitute ce that spans the target sequence.

A "targeting sequence" may have "near" or "substantial" complementarity to the target sequence and still function for the purpose of the present disclosure, that is, still be ementary." Preferably, the oligomer analog compounds employed in the present disclosure have at most one mismatch with the target sequence out of 10 nucleotides, and preferably at most one mismatch out of 20. Alternatively, the antisense oligomers employed have at least 90% sequence homology, and preferably at least 95% sequence homology, with the exemplary targeting sequences as designated herein.

As used herein, the terms "TEG" or "triethylene glycol tail" refer to triethylene glycol moieties conjugated to the ucleotide, e.g., at its 3’- or 5’-end. For example, in some ments, "TEG" includes n, for example, T of the compound of formula (I), (VI), or (VII) is of the formula: As used , the term "quantifying", "quantification" or other related words refer to determining the quantity, mass, or concentration in a unit volume, of a nucleic acid, polynucleotide, oligomer, peptide, polypeptide, or n.

As used herein, "treatment" of a subject (e.g. a mammal, such as a human) or a cell is any type of intervention used in an attempt to alter the l course of the individual or cell.

Treatment includes, but is not limited to, administration of a pharmaceutical composition, and may be performed either prophylactically or subsequent to the initiation of a pathologic event or contact with an gic agent. Also included are "prophylactic" treatments, which can be directed to reducing the rate of progression of the disease or condition being d, delaying the onset of that disease or condition, or reducing the severity of its onset. "Treatment" or "prophylaxis" does not necessarily indicate complete eradication, cure, or prevention of the disease or ion, or associated symptoms thereof.

II. Sequences for Splice Modulation of GAA Certain embodiments relate to methods for enhancing the level of exon 2-containing GAA-coding mRNA ve to exon-2 d GAA mRNA in a cell, sing contacting the cell with an antisense oligomer of sufficient length and complementarity to specifically hybridize to a region within the GAA gene, such that the level of exon 2-containing GAA mRNA relative to exon-2 deleted GAA mRNA in the cell is enhanced. In some embodiments, the cell is in a subject, and the method comprises administering to the antisense oligomer to the subject.

An antisense oligomer can be designed to block or t or te translation of mRNA or to inhibit or modulate pre-mRNA splice processing, or induce degradation of targeted mRNAs, and may be said to be "directed to" or ted against" a target sequence with which it hybridizes. In certain embodiments, the target sequence includes a region including a 3’ or 5’ splice site of a pre-processed mRNA, a branch point, or other sequence involved in the regulation of splicing. The target sequence may be within an exon or within an intron or spanning an intron/exon junction.

In certain embodiments, the antisense er has sufficient sequence complementarity to a target RNA (i.e., the RNA for which splice site selection is modulated) to block a region of a target RNA (e.g., pre-mRNA) in an effective manner. In exemplary embodiments, such ng of GAA pre-mRNA serves to modulate splicing, either by g a binding site for a native protein that would otherwise te splicing and/or by altering the structure of the targeted RNA. In some embodiments, the target RNA is target pre-mRNA (e.g., GAA gene premRNA An antisense er having a sufficient ce complementarity to a target RNA sequence to modulate splicing of the target RNA means that the antisense agent has a sequence sufficient to trigger the masking of a binding site for a native protein that would otherwise modulate splicing and/or alters the three-dimensional structure of the targeted RNA. Likewise, an oligomer reagent having a sufficient sequence complementary to a target RNA sequence to modulate ng of the target RNA means that the oligomer reagent has a sequence sufficient to trigger the masking of a binding site for a native protein that would ise modulate splicing and/or alters the three-dimensional structure of the targeted RNA.

In certain embodiments, the antisense oligomer has sufficient length and complementarity to a sequence in intron 1 of the human GAA pre-mRNA, exon 2 of the human GAA pre-mRNA, or intron 2 of the human GAA NA. Also included are antisense oligomers which are complementary to a region that spans intron 1/exon 2 of the human GAA pre-mRNA, or a region that spans exon 2/intron 2 of the human GAA pre-mRNA. The intron 1 (SEQ ID NO:1), exon 2 (SEQ ID NO:4), and intron 2 (SEQ ID NO:5) sequences for human the GAA gene are shown in Table 1 below (The highlighted T/G near the 3’ end of SEQ ID NO:1 is the IVS1-13T>G mutation described above; the nucleotide at this on is either T or G).

Table 1 Target sequences for rgeted oligomers (from NG_009822) Name Sequence (5’-3’) ID GAA- GTGAGACACCTGACGTCTGCCCCGCGCTGCCGGCGGTAACATC 1 IVS1 CCAGAAGCGGGTTTGAACGTGCCTAGCCGTGCCCCCAGCCTCT GAGCGGAGCTTGAGCCCCAGACCTCTAGTCCTCCCGG TCTTTATCTGAGTTCAGCTTAGAGATGAACGGGGAGCCGCCCT CCTGTGCTGGGCTTGGGGCTGGAGGCTGCATCTTCCCGTTTCTA GGGTTTCCTTTCCCCTTTTGATCGACGCAGTGCTCAGTCCTGGC CGGGACCCGAGCCACCTCTCCTGCTCCTGCAGGACGCACATGG CTGGGTCTGAATCCCTGGGGTGAGGAGCACCGTGGCCTGAGA GGGGGCCCCTGGGCCAGCTCTGAAATCTGAATGTCTCAATCAC AAAGACCCCCTTAGGCCAGGCCAGGGGTGACTGTCTCTGGTCT TTGTCCCTGGTTGCTGGCACATAGCACCCGAAACCCTTGGAAA CCGAGTGATGAGAGAGCCTTTTGCTCATGAGGTGACTGATGAC CGGGGACACCAGGTGGCTTCAGGATGGAAGCAGATGGCCAGA AAGACCAAGGCCTGATGACGGGTTGGGATGGAAAAGGGGTGA GGGGCTGGAGATTGAGTGAATCACCAGTGGCTTAGTCAACCAT GCCTGCACAATGGAACCCCGTAAGAAACCACAGGGATCAGAG GGCTTCCCGCCGGGTTGTGGAACACACCAAGGCACTGGAGGG TGGTGCGAGCAGAGAGCACAGCATCACTGCCCCCACCTCACAC CAGGCCCTACGCATCTCTTCCATACGGCTGTCTGAGTTTTATCC TTTGTAATAAACCAGCAACTGTAAGAAACGCACTTTCCTGAGT TCTGTGACCCTGAAGAGGGAGTCCTGGGAACCTCTGAATTTAT TTGATCGAAAGTACAAGTGACAACCTGGGATTTGCCA TTGGCCTCTGAAGTGAAGGCAGTGTTGTGGGACTGAGCCCTTA ACCTGTGGAGTCTGTGCTGACTCCAGGTAGTGTCAAGATTGAA TGTAGGACACCCAGCCGTGTCCAGAAAGTTGCAGAAT TGATGGGTGTGAGAAAAACCCTACACATTTAATGTCAGAAGTG TGGGTAAAATGTTTCACCCTCCAGCCCAGAGAGCCCTAATTTA CCAGTGGCCCACGGTGGAACACCACGTCCGGCCGGGGGCAGA GCGTTCCCAGCCAAGCCTTCTGTAACATGACATGACAGGTCAG ACTCCCTCGGGCCCTGAGTTCACTTCTTCCTGGTATGTGACCAG CTCCCAGTACCAGAGAAGGTTGCACAGTCCTCTGCTCCAAGGA GCTTCACTGGCCAGGGGCTGCTTTCTGAAATCCTTGCCTGCCTC TGCTCCAAGGCCCGTTCCTCAGAGACGCAGACCCCTCTGATGG CTGACTTTGGTTTGAGGACCTCTCTGCATCCCTCCCCCATGGCC TTGCTCCTAGGACACCTTCTTCCTCCTTTCCCTGGGGTCAGACT TGCCTAGGTGCGGTGGCTCTCCCAGCCTTCCCCACGCCCTCCCC ATGGTGTATTACACACACCAAAGGGACTCCCCTATTGAAATCC ATGCATATTGAATCGCATGTGGGTTCCGGCTGCTCCTGGGAGG AGCCAGGCTAATAGAATGTTTGCCATAAAATATTAATGTACAG AGAAGCGAAACAAAGGTCGTTGGTACTTGTTAACCTTACCAGC AGAATAATGAAAGCGAACCCCCATATCTCATCTGCACGCGACA TCCTTGTTGTGTCTGTACCCGAGGCTCCAGGTGCAGCCACTGTT ACAGAGACTGTGTTTCTTCCCCATGTACCTCGGGGGCCGGGAG GGGTTCTGATCTGCAAAGTCGCCAGAGGTTAAGTCCTTTCTCT CTTGTGGCTTTGCCACCCCTGGAGTGTCACCCTCAGCTGCGGT GCCCAGGATTCCCCACTGTGGTATGTCCGTGCACCAGTCAATA GGAAAGGGAGCAAGGAAAGGTACTGGGTCCCCCTAAGGACAT ACGAGTTGCCAGAATCACTTCCGCTGACACCCAGTGGACCAAG CCGCACCTTTATGCAGAAGTGGGGCTCCCAGCCAGGCGTGGTC ACTCCTGAAATCCCAGCACTTCGGAAGGCCAAGGGGGGTGGA TCACTTGAGCTCAGGAGTTCGAGACCAGCCTGGGTAACATGGC AAAATCCCGTCTCTACAAAAATACAGAAAATTAGCTGGGTGCG GTGGTGTGTGCCTACAGTCCCAGCTACTCAGGAGGCTGAAGTG GGAGGATTGCTTGAGTCTGGGAGGTGGAGGTTGCAGTGAGCC AGGATCTCACCACAGCACTCTGGCCCAGGCGACAGCTGTTTGG CCTGTTTCAAGTGTCTACCTGCCTTGCTGGTCTTCCTGGGGACA TTCTAAGCGTGTTTGATTTGTAACATTTTAGCAGACTGTGCAAG TGCTCTGCACTCCCCTGCTGGAGCTTTTCTCGCCCTTCCTTCTG GCCCTCTCCCCAGTCTAGACAGCAGGGCAACACCCACCCTGGC CACCTTACCCCACCTGCCTGGGTGCTGCAGTGCCAGCCGCGGT CTCAGAGCTGCTTTGAGAGCCCCGTGAGTGCCGCCCC TCCCGCCTCCCTGCTGAGCCCGCTTT/GCTTCTCCCGCAG GAA- TCTCAGAGCTGCTTTGAGAGCCCCGTGAGTGCCGCCCC 2 (38) GAA- GGAGCTTTTCTCGCCCTTCCTTCTGGCCCTCTC 3 ( GAA- GCCTGTAGGAGCTGTCCAGGCCATCTCCAACCATGGGAGTGAG 4 exon2 GCCCTGCTCCCACCGGCTCCTGGCCGTCTGCGCCCTC GTGTCCTTGGCAACCGCTGCACTCCTGGGGCACATCCTACTCC ATGATTTCCTGCTGGTTCCCCGAGAGCTGAGTGGCTCCTCCCC AGTCCTGGAGGAGACTCACCCAGCTCACCAGCAGGGAGCCAG CAGACCAGGGCCCCGGGATGCCCAGGCACACCCCGGCCGTCC CAGAGCAGTGCCCACACAGTGCGACGTCCCCCCCAACAGCCG CTTCGATTGCGCCCCTGACAAGGCCATCACCCAGGAACAGTGC GAGGCCCGCGGCTGTTGCTACATCCCTGCAAAGCAGGGGCTGC AGGGAGCCCAGATGGGGCAGCCCTGGTGCTTCTTCCCACCCAG CAGCTACAAGCTGGAGAACCTGAGCTCCTCTGAAATG GGCTACACGGCCACCCTGACCCGTACCACCCCCACCTTCTTCC CCAAGGACATCCTGACCCTGCGGCTGGACGTGATGATGGAGA CTGAGAACCGCCTCCACTTCACG GAA- GTGGGCAGGGCAGGGGCGGGGGCGGCGGCCAGGGCAGAGGG 5 IVS2 TGCGCGTGGACATCGACACCCACGCACCTCACAAGGGTGGGG TGCATGTTGCACCACTGTGTGCTGGGCCCTTGCTGGGAGCGGA GGTGTGAGCAGACAATGGCAGCGCCCCTCGGGGAGCAGTGGG GACACCACGGTGACAGGTACTCCAGAAGGCAGGGCTCGGGGC TCATTCATCTTTATGAAAAGGTGGGTCAGGTAGAGTAGGGCTG GTTGCGAATGAAAACAGGATGCCCAGTAAACCCGAA TTGCAGATACCCCAGGCATGACTTTGTTTTTTTGTGTAAGGATG CAAAATTTGGGATGTATTTATACTAGAAAAGCTGCTTGTTGTTT ATCTGAAATTCAGAGTTATCAGGTGTTCTGTATTTTACCTCCAT CCTGGGGGAGGCGTCCTCCTCCTGGCTCTGCAGATGAGGGAGC CGAGGCTCAGAGAGGCTGAATGTGCTGCCCATGGTCCCACATC CATGTGTGGCTGCACCAGGACCTGACCTGTCCTTGGCGTGCGG CTCTGGAGAGTAAGGTGGCTGTGGGGAACATCAATAA ACCCCCATCTCTTCTAG In certain ments, antisense targeting sequences are designed to hybridize to a region of one or more of the target sequences listed in Table 1. Selected antisense targeting sequences can be made r, e.g., about 12 bases, or longer, e.g., about 40 bases, and include a small number of mismatches, as long as the sequence is sufficiently complementary to effect splice modulation upon hybridization to the target sequence, and optionally forms with the RNA a heteroduplex having a Tm of 45°C or greater.

In certain embodiments, the degree of complementarity between the target sequence and antisense targeting sequence is sufficient to form a stable duplex. The region of complementarity of the antisense oligomers with the target RNA sequence may be as short as 8-11 bases, but can be 12-15 bases or more, e.g., 10-40 bases, 12-30 bases, 12-25 bases, 15-25 bases, 12-20 bases, or 15-20 bases, including all integers in between these ranges. An antisense er of about 14-15 bases is generally long enough to have a unique complementary ce. In certain embodiments, a minimum length of complementary bases may be required to achieve the requisite g Tm, as discussed .

In certain embodiments, oligomers as long as 40 bases may be suitable, where at least a minimum number of bases, e.g., 10-12 bases, are complementary to the target sequence. In some embodiments, facilitated or active uptake in cells is optimized at oligomer lengths of less than about 30 bases. For PMO oligomers, described further herein, an optimum balance of binding stability and uptake generally occurs at s of 18-25 bases. Included in the disclosure are antisense oligomers (e.g., PMOs, PMO-X, PNAs, LNAs, 2’-OMe) that consist of about 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, or 40 bases, in which at least about 6, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, or 40 contiguous or non- uous bases are complementary to the target sequences of Table 1 (e.g., SEQ ID NOS:1-5, a sequence that spans SEQ ID NOS:1/4 or SEQ ID NOS:4/5).

The antisense oligomers typically ses a base sequence which is sufficiently complementary to a sequence or region within or adjacent to intron 1, exon 2, or intron 2 of the pre-mRNA sequence of the human GAA gene. In crtain embodiments, the oligomers are complementary to SEQ ID NO: 2 and SEQ ID NO: 3. y, an antisense oligomer is able to effectively modulate aberrant ng of the GAA pre-mRNA, and thereby increase expression of active GAA protein. This requirement is optionally met when the oligomer compound has the ability to be actively taken up by mammalian cells, and once taken up, form a stable duplex (or heteroduplex) with the target mRNA, optionally with a Tm greater than about 40°C or 45°C.

In certain embodiments, antisense oligomers may be 100% complementary to the target sequence, or may include mismatches, e.g., to accommodate ts, as long as a duplex formed between the oligomer and target sequence is sufficiently stable to withstand the action of cellular nucleases and other modes of degradation which may occur in vivo. Hence, n oligomers may have ntial mentarity, meaning, about or at least about 70% sequence complementarity, e.g., 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100% sequence complementarity, between the oligomer and the target sequence. Oligomer nes that are less susceptible to cleavage by nucleases are discussed herein. Mismatches, if present, are lly less destabilizing toward the end regions of the hybrid duplex than in the middle. The number of mismatches allowed will depend on the length of the oligomer, the percentage of G:C base pairs in the duplex, and the position of the mismatch(es) in the duplex, according to well understood principles of duplex stability.

Although such an antisense oligomer is not necessarily 100% complementary to the v target sequence, it is effective to stably and specifically bind to the target sequence, such that splicing of the target pre-RNA is modulated.

The stability of the duplex formed between an oligomer and a target sequence is a function of the binding Tm and the tibility of the duplex to cellular enzymatic cleavage.

The Tm of an oligomer with respect to complementary-sequence RNA may be measured by conventional methods, such as those described by Hames et al., Nucleic Acid Hybridization, IRL Press, 1985, pp. 107-108 or as described in Miyada C. G. and Wallace R. B., 1987, Oligomer Hybridization Techniques, s Enzymol. Vol. 154 pp. 94-107. In certain embodiments, antisense oligomers may have a binding Tm, with respect to a mentarysequence RNA, of greater than body temperature and preferably greater than about 45°C or 50°C. Tm’s in the range 60-80°C or greater are also included. According to well-known principles, the Tm of an oligomer, with t to a mentary-based RNA hybrid, can be increased by increasing the ratio of C:G paired bases in the duplex, and/or by increasing the length (in base pairs) of the heteroduplex. At the same time, for purposes of zing cellular uptake, it may be advantageous to limit the size of the oligomer. For this reason, compounds that show high Tm (45-50°C or greater) at a length of 25 bases or less are generally red over those requiring greater than 25 bases for high Tm values.

Tables 2A, 2B, and 2C show exemplary targeting sequences (in a 5’-to-3’ orientation) mentary to pre-mRNA sequences of the human GAA gene.

Table 2A Table 2A - Exemplary Targeting Sequences (Deletion Sequences) Targeting Sequence (TS)* TS SEQ Coordinates (5’-3’) ID NO GAA-IVS1.SA.(-189,- GGC CAG AAG GAA GGC GAG AAA AGC 165)-G GAA-IVS1.SA.(-190,- GCC AGA AGG AAG GC GAG AAA AGC X 166)-G GAA-IVS1.SA.(-191,- CCA GAA GGA AGG CGA GAA AAG CXC 167)-G S1.SA.(-192,- CAG AAG GAA GGC GAG AAA AGC XCC 168)-G GAA-IVS1.SA.(-193,- AGA AGG AAG GCG AGA AAA GCX CCA 169)-G GAA-IVS1.SA.(-194,- GAA GGA AGG CGA GAA AAG CXC CAG 170)-G GAA-IVS1.SA.(-195,- AAG GAA GGC GAG AAA AGC XCC AGC 171)-G GAA-IVS1.SA.(-196,- AGG AAG GCG AGA AAA GCX CCA GCA 172)-G GAA-IVS1(52)-2G CGG CXC XCA AAG CAG CXC XGA GA 21 GAA-IVS1(51)-2G ACG GCX CXC AAA GCA GCX CXG AG 22 GAA-IVS1(50)-2G CAC GGC XCX CAA AGC AGC XCX GA 23 GAA-IVS1(49)-2G XCA CGG CXC XCA AAG CAG CXC XG 24 S1(48)-2G CXC ACG GCX CXC AAA GCA GCX CX 25 GAA-IVS1(47)-2G ACX CAC GGC XCX CAA AGC AGC XC 26 GAA-IVS1(42)-2G GCG GCA CXC ACG GCX CXC AAA GC 27 S1(41)-2G GGC GGC ACX CAC GGC XCX CAA AG 28 GAA-IVS1(43)-2G CGG CAC XCA CGG CXC XCA AAG CA 29 GAA-IVS1(45)-2G GCA CXC ACG GCX CXC AAA GCA GC 30 S1(44)-2G GGC ACX CAC GGC XCX CAA AGC AG 31 GAA-IVS1(46)-2G CAC XCA CGG CXC XCA AAG CAG CX 32 GAA-IVS1.SA.(-189,- GCC AGA AGG AAG GCG AGA AAA GC 166)-G GAA-IVS1.SA.(-189,- CCA GAA GGA AGG CGA GAA AAG C 167)-G GAA-IVS1.SA.(-189,- CAG AAG GAA GGC GAG AAA AGC 168)-G GAA-IVS1.SA.(-188,- GGC CAG AAG GAA GGC GAG AAA AG 165)-G GAA-IVS1.SA.(-187,- GGC CAG AAG GAA GGC GAG AAA A 165)-G GAA-IVS1.SA.(-186,- GGC CAG AAG GAA GGC GAG AAA 165)-G GAA-IVS1(43)-2G CGG CAC XCA CGGC XCX CAA AGC A 39 GAA-IVS1(42)-2G GCG GCA CXC ACGG CXC XCA AAG C 40 GAA-IVS1(41)-2G GGC GGC ACX CAC G GCX CXC AAA G 41 GAA-IVS1.SA.(-180,- XGG GGA GAG GGC CAG AAG GAA GGC 156)-G GAA-IVS1.SA.(-180,- XGG GGA GAG GGC CAG AAG GAA GC 156)-2G Table 2A - ary Targeting Sequences (Deletion Sequences) Targeting Sequence (TS)* TS SEQ nates (5’-3’) ID NO GAA-IVS1.SA.(-180,- XGG GGA GAG GGC CAG AAG GAA C GAA-IVS1.SA.(-189,- GGC CAG AAG GAA GCG AGA AAA GC 165)-2G GAA-IVS1.SA.(-189,- GGC CAG AAG GAA CGA GAA AAG C 165)-3G GAA-IVS1.SA.(-196,- AGG AAG CGA GAA AAG CXC CAG CA 172)-2G GAA-IVS1.SA.(-196,- AGG AAC GAG AAA AGC XCC AGC A 172)-3G GAA-IVS1(52)-G CGG GCX CXC AAA GCA GCX CXG AGA 49 GAA-IVS1(52)-3G CGC XCX CAA AGC AGC XCX GAG A 50 GAA-IVS1(52)-4G CCX CXC AAA GCA GCX CXG AGA 51 GAA-IVS1(41)-G GGC GGC ACX CAC GGG CXC XCA AAG 52 GAA-IVS1(41)-3G GGC GGC ACX CAC GCX CXC AAA G 53 GAA-IVS1(41)-4G GGC GGC ACX CAC CXC XCA AAG 54 GAA-IVS1(33)-G GCG GGA GGG GCG GCA CXC ACG GGC 55 GAA-IVS1(33)-2G GCG GGA GGG GCG GCA CXC ACG GC 56 GAA-IVS1(33)-3G GCG GGA GGG GCG GCA CXC ACG C 57 GAA-IVS1(33)-4G GCG GGA GGG GCG GCA CXC ACC 58 For any of the sequences in Table 2A, each X is ndently selected from thymine (T) or uracil "-G", "-2G", "-3G", or "-4G" designate targeting sequences which are complementary to a target region within intron 1 (SEQ ID NO: 137) of a pre-mRNA of the human alpha glucosidase (GAA) gene, wherein the target region ses one, two, three, or four additional nucleobases compared to the targeting sequence, wherein those additional nucleobases are cytosines, and wherein the one, two, three, or four additional nucleobases have no corresponding complementary nucleobases in the targeting sequence (hence, -G (guanine), -2G, -3G, or -4G). The onal nucleobases are internal to the target region.

Table 2B Table 2B – ary Targeting Sequences Targeting Sequence (TS)* TS SEQ Coordinates (5’-3’) ID NO GAA-IVS1.SA.(-189,- GGC CAG AAG GAA GGG CGA GAA AAG C GAA-IVS1.SA.(-191,- CCA GAA GGA AGG GCG AGA AAA GCX C GAA-IVS1.SA.(-195,- AAG GAA GGG CGA GAA AAG CXC CAG C GAA-IVS1(33) GCG GGA GGG GCG GCA CXC ACG GGG C 62 GAA-IVS1.SA.(-180,- XGG GGA GAG GGC CAG AAG GAA GGG C GAA-IVS1.SA.(-193,- AGA AGG AAG GGC GAG AAA AGC XCC A GAA-IVS1(56) GCX CXC AAA GCA GCX CXG AGA CAX C 65 GAA-IVS1(57) CXC XCA AAG CAG CXC XGA GAC AXC A 66 Table 2B – ary Targeting Sequences Targeting Sequence (TS)* TS SEQ Coordinates (5’-3’) ID NO GAA-IVS1(58) XCX CAA AGC AGC XCX GAG ACA XCA A 67 GAA-IVS1(59) CXC AAA GCA GCX CXG AGA CAX CAA C 68 GAA-IVS1(60) XCA AAG CAG CXC XGA GAC AXC AAC C 69 GAA-IVS1(61) CAA AGC AGC XCX GAG ACA XCA ACC G 70 GAA-IVS1(62) AAA GCA GCX CXG AGA CAX CAA CCG C 71 GAA-IVS1(63) AAG CAG CXC XGA GAC AXC AAC CGC G 72 GAA-IVS1(64) AGC AGC XCX GAG ACA XCA ACC GCG G 73 GAA-IVS1(65) GCA GCX CXG AGA CAX CAA CCG CGG C 74 GAA-IVS1(66) CAG CXC XGA GAC AXC AAC CGC GGC X 75 For any of the sequences in Table 2B, each X is independently selected from thymine (T) or uracil Table 2C Table 2C – Exemplary Targeting Sequences Targeting Sequence (TS)* TS SEQ Coordinates (5’-3’) ID NO GAA-IVS1.SA.(-190,- GCC AGA AGG AAG GGC GAG AAA AGC X GAA-IVS1.SA.(-192,- CAG AAG GAA GGG CGA GAA AAG CXC C GAA-IVS1.SA.(-194,- GAA GGA AGG GCG AGA AAA GCX CCA G GAA-IVS1.SA.(-196,- AGG AAG GGC GAG AAA AGC XCC AGC A GAA-IVS1(47) ACX CAC GGG GCX CXC AAA GCA GCX C 80 GAA-IVS1(55) GGCXCXCAAAGCAGCXCXGAGACAX 81 GAA-IVS1(55) GGC XCX CAA AGC AGC XCX GA 82 GAA-IVS1(160) GAG AGG GCC AGA AGG AAG GG 83 GAA-IVS1.2178.20 XXX GCC AXG XXA CCC AGG CX 84 GAA-IVS2.27.20 GCG CAC CCX CXG CCC XGG CC 85 GAAEx2A(+202+226) GGC CCX GGX CXG CXG GCX CCC XGC X 86 For any of the sequences in Table 2C, each X is independently selected from thymine (T) or uracil Certain antisense oligomers thus comprise, consist, or consist essentially of a sequence in Tables 2A-2C or a variant or uous or non-contiguous portion(s) thereof. For instance, certain antisense oligomers comprise about or at least about 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, or 27 contiguous or non-contiguous nucleotides of any of the SEQ ID NOS outlined in Tables 2A-2C. In certain ments, the targeting sequence is ed from the group consisting of SEQ ID NOs: 13, 27-29, 34-36, 59, and 82. For non- contiguous portions, intervening nucleotides can be deleted. Additional examples of variants include ers having about or at least about 70% ce identity or homology, e.g., 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100% sequence identity or homology, over the entire length of any of the SEQ ID NOS outlined in Tables 2A-C.

In some embodiments, any of the antisense oligomers or nds sing, consisting of, or consisting essentially of such variant sequences suppress an ISS and/or ESS element in the GAA pre-mRNA. In some embodiments, the antisense oligomer or compound with a targeting sequence that comprises, consists of, or consists essentially of such a variant sequence suppresses an ISS and/or ESS element in the GAA pre-mRNA. In some embodiments, the antisense oligomer or compound with a targeting sequence that comprises, consists of, or ts essentially of such a variant sequence ses, enhances, or promotes exon 2 retention in the mature GAA mRNA, optionally, by at least about 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, or 65% or more relative to a control, according to at least one of the examples or methods described herein. In some embodiments, the nse oligomer or compound with a targeting sequence that ses, ts of, or consists essentially of such a variant sequence ses, enhances, or promotes GAA protein expression in a cell, optionally, by at least about 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, or 65% or more relative to a control, ing to at least one of the examples or s described herein. In some embodiments, the antisense oligomer or compound comprising, consisting of, or consisting essentially of such a variant sequence increases, enhances, or promotes GAA enzymatic activity in a cell, optionally, by at least about 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, or 65% or more relative to a control, according to at least one of the examples or methods described herein. As exemplified herein, a cell (e.g., a fibroblast cell) can be obtained from a patient having a IVS1-13T>G mutation.

In some embodiments, certain antisense oligomers comprise, t, or consist ially of a sequence as detailed in Table 2B (or Table 2C) or a variant or contiguous or non- contiguous portion(s) thereof. For instance, certain antisense oligomers se about or at least about 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, or 27 contiguous or non-contiguous nucleotides of any of SEQ ID NOS outlined in Table 2B or 2C.

For non-contiguous ns, ening nucleotides can be d. Additional examples of variants include oligomers having about or at least about 70% sequence identity or homology, e.g., 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100% sequence identity or homology, over the entire length of any of SEQ ID NOS ed in Table 2B or 2C. In some embodiments, the antisense oligomer or compound with a targeting sequence that comprises, consists of, or consists essentially of such a variant sequence suppresses an ISS and/or ESS element in the GAA pre-mRNA. In some embodiments, the antisense oligomer or compound with a targeting ce that comprises, consists of, or consists essentially of such a variant sequence increases, enhances, or promotes exon 2 retention in the mature GAA mRNA, optionally, by at least about 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, or 65% or more relative to a control, according to at least one of the examples or methods described herein. In some embodiments, the antisense oligomer or compound with a targeting sequence that comprises, ts of, or consists essentially of such a variant sequence increases, enhances, or promotes GAA protein expression in a cell, optionally, by at least about 10%, 15%, %, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, or 65% or more relative to a control, according to at least one of the examples or methods described herein. In some embodiments, the antisense oligomer or compound comprising, consisting of, or consisting essentially of such a t ce increases, enhances, or promotes GAA tic activity in a cell, optionally, by at least about 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, or 65% or more relative to a l, according to at least one of the examples or methods described herein. As exemplified herein, a cell (e.g., a fibroblast cell) can be obtained from a patient having a IVS1-13T>G mutation.

In various aspects an antisense oligomer or nd is provided, comprising a targeting sequence that is complementary (e.g., at least 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, or 100% complementary) to a target region of the human GAA pre-mRNA, optionally where the targeting sequences is as set forth in any one of Tables 2A- 2C. In r aspect, an antisense oligomer or compound is provided, comprising a variant targeting ce, such as any of those described herein, wherein the t targeting sequence binds to a target region of the human pre-mRNA that is complementary (e.g., 80%-100% complementary) to one or more of the targeting sequences set forth in any one of Tables 2A-2C.

In some embodiments, the antisense oligomer or compound binds to a target sequence comprising at least 10 (e.g., at least 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, or 40) consecutive bases of the human GAA pre-mRNA (e.g., any of SEQ ID NOs:1, 2, or 3 or a sequence that spans a GAA NA splice junction defined by SEQ ID NO:1/4 or SEQ ID ). In some embodiments, the target sequence is complementary (e.g., at least 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, or 100% mentary) to one or more of the targeting sequences set forth in any one of Tables 2A-2C. In some embodiments, the target sequence is mentary (e.g., at least 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, or 100% complementary) to at least 10 (e.g., at least 11, 12, 13, 14, 15, 16, 17, 18, 19, , 21, 22, 23, 24, 25, 26, 27, or 28) consecutive bases of one or more of the targeting sequences set forth in any one of Tables 2A-2C. In some embodiments, the target sequence is defined by an annealing site (e.g., GAA-IVS1.SA.(-189,-165)) as set forth in one or more of the Tables herein.

The activity of antisense oligomers and variants thereof can be assayed according to routine techniques in the art. For example, splice forms and expression levels of surveyed RNAs and proteins may be assessed by any of a wide variety of well-known methods for detecting splice forms and/or expression of a transcribed nucleic acid or n. Non-limiting examples of such methods include RT-PCR of spliced forms of RNA followed by size separation of PCR products, c acid hybridization methods e.g., Northern blots and/or use of nucleic acid arrays; nucleic acid amplification methods; immunological methods for ion of ns; protein cation methods; and protein function or activity assays.

RNA expression levels can be assessed by preparing mRNA/cDNA (i.e., a transcribed cleotide) from a cell, tissue or organism, and by hybridizing the mRNA/cDNA with a reference polynucleotide that is a complement of the assayed nucleic acid, or a fragment thereof. cDNA can, optionally, be amplified using any of a variety of polymerase chain reaction or in vitro transcription methods prior to hybridization with the complementary polynucleotide; preferably, it is not amplified. Expression of one or more transcripts can also be detected using quantitative PCR to assess the level of expression of the transcript(s).

III. Antisense er tries A. General teristics Certain antisense oligomers of the instant disclosure specifically hybridize to an intronic splice silencer element or an exonic splice silencer element. Some antisense ers se a targeting sequence set forth in Tables 2A-2C, a fragment of at least 10 contiguous nucleotides of a ing sequence in Tables 2A-2C, or variant having at least 80% sequence identity to a targeting sequence in Tables 2A-2C. Specific antisense oligomers consist or consist essentially of a targeting sequence set forth in Tables 2A-2C. In some embodiments, the oligomer is nuclease-resistant.

In certain embodiments, the antisense oligomer comprises a tural chemical backbone selected from a phosphoramidate or phosphorodiamidate morpholino oligomer (PMO), a peptide nucleic acid (PNA), a locked nucleic acid (LNA), a phosphorothioate oligomer, a tricyclo-DNA er, a tricyclo-phosphorothioate oligomer, a 2’O-Me-modified oligomer, or any combination of the foregoing, and a ing sequence complementary to a region within intron 1 (SEQ ID. NO: 1) [including portions identified by SEQ ID NO: 2 and SEQ ID NO: 3], intron 2 (SEQ ID. NO: 5), or exon 2 (SEQ ID. NO: 4) of a pre-mRNA of the human acid alpha-glucosidase (GAA) gene. For example, in some embodiments, the targeting sequence is selected from the ces outlined in Tables 2A-2C, wherein X is ed from uracil (U) or thymine (T). Further, and for example, the targeting sequence is ed from the sequences outlined in Tables 2A-2C. In some embodiments, an oligonucleotide described herein has a targeting sequence set forth in Tables 4A-4C.

Antisense oligomers of the disclosure generally comprise a plurality of nucleotide ts each bearing a nucleobase which taken together form or comprise a targeting sequence, for example, as discussed above. ingly, in some embodiments, the antisense oligomers range in length from about 10 to about 40 subunits, more preferably about 10 to 30 subunits, and typically 15-25 subunits. For example, antisense compounds of the disclosure may be 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, or 40 subunits in length, or range from 10 subunits to 40 subunits, 10 subunits to 30 subunits, 14 subunits to 25 subunits, 15 subunits to 30 subunits, 17 subunits to 30 ts, 17 subunits to 27 ts, 10 subunits to 27 subunits, 10 subunits to 25 subunits, and 10 subunits to 20 subunits. In n ments, the antisense oligomer is about 10 to about 40 or about 5 to about 30 nucleotides in length. In some embodiments, the antisense oligomer is about 14 to about 25 or about 17 to about 27 nucleotides in length.

In various embodiments, an antisense er may comprise a completely modified backbone, for example, 100% of the backbone is modified (for example, a 25 mer antisense oligomer comprises its entire backbone modified with any combination of the backbone modifications as described herein). In various embodiments, an antisense oligomer may comprise about 100% to 2.5% of its backbone modified. In various embodiments, an antisense er may comprise about 99%, 95%, 90%, 85%, 80%, 75%, 70%, 65%, 60%, 55%, 50%, 45%, 40%, 35%, 30%, 25%, 20%, 15%, 10%, 5%, or 2.5% of its backbone modified, and iterations in between. In other embodiments, an antisense er may comprise any combination of backbone modifications as described herein.

In various embodiments, an antisense oligomer may comprise, consist of, or consist essentially of phosphoramidate morpholino oligomers and orodiamidate morpholino ers (PMO), phosphorothioate modified oligomers, 2’ O-methyl modified oligomers, peptide nucleic acid (PNA), locked nucleic acid (LNA), phosphorothioate oligomers, 2’ O-MOE ed ers, 2’-fluoro-modified oligomer, 2'O,4'C-ethylene-bridged nucleic acids (ENAs), tricyclo-DNAs, tricyclo-DNA phosphorothioate nucleotides, 2'-O-[2-(N- methylcarbamoyl)ethyl] modified oligomers, morpholino oligomers, peptide-conjugated phosphoramidate morpholino oligomers (PPMO), phosphorodiamidate morpholino oligomers having a phosphorous atom with (i) a covalent bonds to the nitrogen atom of a morpholino ring, and (ii) a second nt bond to a (1,4-piperazin)yl substituent or to a substituted (1,4- piperazin)yl (PMOplus), and phosphorodiamidate morpholino oligomers having a orus atom with (i) a covalent bond to the nitrogen atom of a morpholino ring and (ii) a second covalent bond to the ring en of a 4-aminopiperdinyl (i.e., APN) or a tive of 4- aminopiperdinyl (PMO-X) chemistries, including combinations of any of the foregoing.

In some embodiments, the backbone of the antisense oligomer is substantially uncharged, and is optionally recognized as a substrate for active or facilitated transport across the cell membrane. In some embodiments, all the internucloeside linkages are uncharged. The ability of the oligomer to form a stable duplex with the target RNA may also relate to other features of the backbone, including the length and degree of complementarity of the antisense oligomer with respect to the target, the ratio of G:C to A:T base matches, and the positions of any mismatched bases. The ability of the antisense oligomer to resist cellular nucleases may promote al and ultimate delivery of the agent to the cell asm. Exemplary antisense oligomer targeting sequences are listed in Tables 2A, 2B, and 2C.

In certain embodiments, the antisense oligomer has at least one internucleoside linkage that is positively charged or cationic at physiological pH. In some embodiments, the antisense oligomer has at least one internucleoside linkage that exhibits a pKa between about 5.5 and about 12. In further embodiments, the antisense oligomer contains about, at least about, or no more than about 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 internucleoside linkages that exhibits a pKa between about 4.5 and about 12. In some embodiments, the antisense oligomer contains about or at least about 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or 100% internucleoside es that exhibit a pKa between about 4.5 and about 12. Optionally, the antisense oligomer has at least one internucleoside linkage with both a basic nitrogen and an alkyl, aryl, or aralkyl group. In particular embodiments, the cationic internucleoside linkage or linkages comprise a 4-aminopiperdinyl (APN) group, or a tive f. While not being bound by any one , it is believed that the presence of a cationic linkage or es (e.g., APN group or APN derivative) in the oligomer facilitates binding to the negatively charged phosphates in the target tide. Thus, the formation of a heteroduplex between mutant RNA and the ic linkage-containing er may be held together by both an ionic attractive force and Watson-Crick base pairing.

In some embodiments, the number of cationic linkages is at least 2 and no more than about half the total internucleoside linkages, e.g., about or no more than about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 cationic es. In some embodiments, however, up to all of the internucleoside linkages are cationic linkages, e.g., about or at least about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, or 40 of the total internucleoside linkages are cationic linkages. In specific embodiments, an oligomer of about 19-20 subunits may have 2-10, e.g., 4-8, cationic linkages, and the remainder uncharged linkages. In other specific embodiments, an oligomer of 14-15 subunits may have 2-7, e.g., 2, 3, 4, 5, 6, or 7 cationic es and the remainder ged linkages. The total number of cationic linkages in the oligomer can thus vary from about 1 to 10 to 15 to 20 to 30 or more (including all integers in between), and can be interspersed throughout the oligomer.

In some embodiments, an antisense er may have about or up to about 1 cationic e per every 2-5 or 2, 3, 4, or 5 uncharged linkages, such as about 4-5 or 4 or 5 per every uncharged linkages.

Certain embodiments e antisense oligomers that contain about 10%, 15%, 20%, %, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or 100% cationic linkages. In certain embodiments, optimal improvement in antisense activity may be seen if about 25% of the backbone linkages are cationic. In certain embodiments, enhancement may be seen with a small number e.g., 10-20% cationic linkages, or where the number of cationic linkages are in the range 50-80%, such as about 60%.

In some embodiments, the cationic linkages are interspersed along the backbone. Such oligomers optionally n at least two consecutive uncharged linkages; that is, the oligomer optionally does not have a strictly ating pattern along its entire length. In specific instances, each one or two cationic linkage(s) is/are separated along the backbone by at least 1, 2, 3, 4, or 5 ged linkages.

Also included are oligomers having blocks of cationic linkages and blocks of uncharged linkages. For example, a central block of uncharged linkages may be flanked by blocks of cationic linkages, or vice versa. In some embodiments, the oligomer has approximately equal- length 5’, 3’ and center regions, and the tage of cationic linkages in the center region is greater than about 50%, 60%, 70%, or 80% of the total number of cationic linkages.

In certain antisense oligomers, the bulk of the cationic linkages (e.g., 70, 75%, 80%, 90% of the cationic es) are distributed close to the "center-region" backbone linkages, e.g., the 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 centermost linkages. For example, a 16, 17, 18, 19, 20, 21, 22, 23, or 24-mer oligomer with may have at least 50%, 60%, 70%, or 80% of the total cationic linkages localized to the 8, 9, 10, 11, or 12 centermost linkages.

B. Backbone Chemistry Features The nse oligomers can employ a variety of antisense chemistries. Examples of oligomer tries include, without limitation, phosphoramidate lino oligomers and phosphorodiamidate morpholino oligomers (PMO), phosphorothioate modified oligomers, 2’ O- methyl modified ers, peptide nucleic acid (PNA), locked nucleic acid (LNA), phosphorothioate oligomers, 2’ O-MOE modified ers, 2’-fluoro-modified oligomer, 2'O,4'C-ethylene-bridged nucleic acids (ENAs), tricyclo-DNAs, tricyclo-DNA phosphorothioate nucleotides, 2'-O-[2-(N-methylcarbamoyl)ethyl] modified oligomers, lino oligomers, peptide-conjugated phosphoramidate morpholino oligomers (PPMO), phosphorodiamidate morpholino oligomers having a phosphorous atom with (i) a covalent bonds to the nitrogen atom of a morpholino ring, and (ii) a second covalent bond to a iperazin) yl substituent or to a substituted (1,4-piperazin)yl (PMOplus), and phosphorodiamidate morpholino ers having a phosphorus atom with (i) a covalent bond to the nitrogen atom of a morpholino ring and (ii) a second nt bond to the ring en of a 4-aminopiperdin- 1-yl (i.e., APN) or a derivative of 4-aminopiperdinyl (PMO-X) chemistries, ing combinations of any of the foregoing. In general, PNA and LNA chemistries can utilize shorter targeting sequences because of their relatively high target binding strength relative to PMO and 2’O-Me modified oligomers. Phosphorothioate and 2’O-Me-modified chemistries can be combined to generate a 2’O-Me-phosphorothioate backbone. See, e.g., PCT Publication Nos.

WO/2013/112053 and WO/2009/008725, which are hereby incorporated by reference in their entireties.

In some instances, antisense oligomers such as PMOs can be conjugated to cell penetrating peptides (CPPs) to facilitate intracellular delivery. Peptide-conjugated PMOs are called PPMOs and certain ments include those described in PCT Publication No.

WO/2012/150960, incorporated herein by reference in its entirety. In some ments, an arginine-rich peptide sequence conjugated or linked to, for example, the 3’ terminal end of an antisense oligomer as described herein may be used. In certain embodiments, an arginine-rich peptide sequence conjugated or linked to, for example, the 5’ al end of an antisense er as described herein may be used. 1. Peptide Nucleic Acids (PNAs) Peptide nucleic acids (PNAs) are analogs of DNA in which the backbone is structurally homomorphous with a deoxyribose backbone, consisting of N-(2-aminoethyl) glycine units to which pyrimidine or purine bases are attached. PNAs containing natural dine and purine bases hybridize to mentary oligomers obeying Watson-Crick base-pairing rules, and mimic DNA in terms of base pair recognition (Egholm, Buchardt et al. 1993). The backbone of PNAs is formed by peptide bonds rather than phosphodiester bonds, making them well-suited for antisense ations (see structure below). The backbone is ged, resulting in PNA/DNA or PNA/RNA duplexes that exhibit greater than normal thermal stability. PNAs are not recognized by ses or proteases. A non-limiting example of a PNA is depicted below: Despite a radical structural change to the l structure, PNAs are capable of ce-specific binding in a helix form to DNA or RNA. Characteristics of PNAs include a high binding affinity to complementary DNA or RNA, a destabilizing effect caused by singlebase mismatch, resistance to nucleases and proteases, hybridization with DNA or RNA ndent of salt concentration and triplex formation with homopurine DNA. PANAGENE™ has developed its proprietary Bts PNA monomers (Bts; benzothiazolesulfonyl group) and proprietary oligomerization process. The PNA oligomerization using Bts PNA monomers is composed of repetitive cycles of deprotection, coupling and g. PNAs can be produced synthetically using any technique known in the art. See, e.g., U.S. Pat. Nos. 6,969,766, 7,211,668, 7,022,851, 7,125,994, 7,145,006 and 7,179,896. See also U.S. Pat. Nos. 5,539,082; ,714,331; and 5,719,262 for the ation of PNAs. r teaching of PNA compounds can be found in Nielsen et al., Science, 254:1497-1500, 1991. Each of the foregoing is incorporated by reference in its entirety. 2. Locked Nucleic Acids (LNAs) Antisense oligomer nds may also contain "locked nucleic acid" subunits (LNAs).

"LNAs" are a member of a class of modifications called bridged nucleic acid (BNA). BNA is characterized by a covalent linkage that locks the conformation of the ribose ring in a C30-endo (northern) sugar . For LNA, the bridge is composed of a ene between the 2’-O and the 4’-C positions. LNA enhances backbone preorganization and base stacking to se hybridization and thermal stability.

The structures of LNAs can be found, for example, in , et al., Chemical Communications (1998) 455; Tetrahedron (1998) 54:3607, and Accounts of Chem. Research (1999) 32:301); Obika, et al., Tetrahedron Letters (1997) 38:8735; (1998) 39:5401, and Bioorganic Medicinal Chemistry (2008) 16:9230, which are hereby incorporated by nce in their entirety. A non-limiting e of an LNA is depicted below: Compounds of the disclosure may incorporate one or more LNAs; in some cases, the compounds may be entirely composed of LNAs. Methods for the synthesis of individual LNA nucleoside subunits and their incorporation into oligomers are described, for example, in U.S.

Pat. Nos. 582, 7,569,575, 7,084,125, 7,060,809, 7,053,207, 133, 6,794,499, and 6,670,461, each of which is orated by reference in its entirety. Typical intersubunit linkers e phosphodiester and phosphorothioate moieties; alternatively, non-phosphorous containing s may be employed. Further embodiments include an LNA containing compound where each LNA subunit is separated by a DNA subunit. Certain compounds are composed of alternating LNA and DNA subunits where the intersubunit linker is phosphorothioate. 2'O,4'C-ethylene-bridged nucleic acids (ENAs) are another member of the class of BNAs.

A non-limiting example is depicted below: ENA oligomers and their preparation are described in Obika et al., Tetrahedron Ltt 38 (50): 8735, which is hereby incorporated by reference in its entirety. nds of the disclosure may incorporate one or more ENA subunits. 3. Phosphorothioates "Phosphorothioates" (or S-oligos) are a variant of normal DNA in which one of the nonbridging oxygens is replaced by a sulfur. A non-limiting example of a phosphorothioate is depicted below: The sulfurization of the internucleotide bond reduces the action of endo-and exonucleases ing 5’ to 3’ and 3’ to 5’ DNA POL 1 exonuclease, ses S1 and P1, RNases, serum nucleases and snake venom phosphodiesterase. Phosphorothioates are made by two principal routes: by the action of a solution of elemental sulfur in carbon ide on a hydrogen phosphonate, or by the method of sulfurizing phosphite triesters with either tetraethylthiuram disulfide (TETD) or 3H-1, 2-bensodithiolone 1, 1-dioxide (BDTD) (see, e.g., Iyer et al., J. Org. Chem. 55, 4693-4699, 1990, which are hereby incorporated by reference in their entirety). The latter methods avoid the problem of tal sulfur’s insolubility in most c solvents and the toxicity of carbon disulfide. The TETD and BDTD s also yield higher purity orothioates. 4. Triclyclo-DNAs and Tricyclo-Phosphorothioate Nucleotides Tricyclo-DNAs (tc-DNA) are a class of constrained DNA analogs in which each nucleotide is modified by the uction of a cyclopropane ring to restrict conformational flexibility of the backbone and to optimize the backbone geometry of the torsion angle γ.

Homobasic adenine- and thymine-containing tc-DNAs form extraordinarily stable A-T base pairs with complementary RNAs. Tricyclo-DNAs and their synthesis are described in International Patent Application Publication No. WO 15993, which are hereby incorporated by reference in their entirety. Compounds of the disclosure may incorporate one or more tricycle-DNA nucleotides; in some cases, the compounds may be entirely composed of tricycle-DNA nucleotides.

Tricyclo-phosphorothioate tides are tricyclo-DNA tides with phosphorothioate intersubunit linkages. Tricyclo-phosphorothioate nucleotides and their synthesis are described in International Patent Application Publication No. which are hereby orated by reference in their entirety. Compounds of the disclosure may incorporate one or more tricycle-DNA nucleotides; in some cases, the compounds may be entirely composed of tricycle-DNA nucleotides. A non-limiting e of a tricycle- DNA/tricycle-phophothioate nucleotide is depicted below: . 2’ O-Methyl, 2’ O-MOE, and 2’-F Oligomers "2’O-Me oligomer" molecules carry a methyl group at the 2’-OH residue of the ribose molecule. e-RNAs show the same (or similar) behavior as DNA, but are protected against se degradation. 2’-O-Me-RNAs can also be combined with phosphothioate oligomers (PTOs) for further stabilization. 2’O-Me oligomers (phosphodiester or phosphothioate) can be synthesized according to routine ques in the art (see, e.g., Yoo et al., Nucleic Acids Res. 32:2008-16, 2004, which is hereby orated by reference in its entirety). A non-limiting example of a 2’ O-Me oligomer is ed below: 2’ O-Me oligomers may also comprise a phosphorothioate linkage (2’ O-Me phosphorothioate oligomers). 2’ O-Methoxyethyl Oligomers (2’-O MOE), like 2’ O-Me oligomers, carry a methoxyethyl group at the 2’-OH residue of the ribose molecule and are discussed in Martin et al., Helv. Chim. Acta, 78, 486-504, 1995, which are hereby incorporated by reference in their entirety. A non-limiting example of a 2’ O-MOE nucleotide is depicted below: In contrast to the preceding alkylated 2’OH ribose derivatives, 2’-fluoro oligomers have a fluoro radical in at the 2’ position in place of the 2’OH. A miting example of a 2’-F oligomer is depicted below: 2’-fluoro oligomers are further described in nce in its entirety. Compounds of the disclosure may incorporate one or more 2’O-Methyl, 2’ O-MOE, and 2’-F subunits and may utilize any of the ubunit linkages described here. In some instances, a compound of the disclosure could be composed of entirely 2’O-Methyl, 2’ O- MOE, or 2’-F subunits. One embodiment of a compound of the disclosure is composed entirely of 2’O-methyl subunits. 6. 2'-O-[2-(N-methylcarbamoyl)ethyl] Oligonucleotides (MCEs) MCEs are r example of 2’O modified ribonucleosides useful in the compounds of the disclosure. Here, the 2’OH is derivatized to a 2-(N-methylcarbamoyl)ethyl moiety to increase se resistance. A miting example of an MCE oligomer is depicted below: MCEs and their sis are described in Yamada et al., J. Org. Chem., 76(9):3042-53, which is hereby incorporated by reference in its entirety. Compounds of the disclosure may incorporate one or more MCE subunits. 7. Stereo ic Oligomers Stereo specific oligomers are those which the stereo chemistry of each phosphorous-containing linkage is fix by the method of synthesis such that a substantially pure single oligomer is produced. A nonlimiting example of a stereo ic oligomer is depicted below: In the above e, each phosphorous of the oligomer has the same stereo try.

Additional examples include the oligomers bed above. For example, LNAs, ENAs, Tricyclo- DNAs, MCEs, 2’ O-Methyl, 2’ O-MOE, 2’-F, and morpholino-based oligomers can be prepared with stereo-specific phosphorous-containing internucleoside linkages such as, for example, phosphorothioate, phosphodiester, phosphoramidate, phosphorodiamidate, or other phorous-containing internucleoside linkages. Stereo specific oligomers, methods of preparation, chirol controlled synthesis, chiral design, and chiral auxiliaries for use in preparation of such oligomers are detailed, for example, in WO2015107425, WO2015108048, WO2015108046, WO2015108047, WO2012039448, WO2010064146, WO2011034072, WO2014010250, WO2014012081, 0127858, and WO2011005761, each of which is hereby incorporated by reference in its entirety. 8. Morpholino-based Oligomers Morpholino-based oligomers refer to an oligomer comprising morpholino subunits supporting a nucleobase and, instead of a ribose, contains a morpholine ring. Exemplary internucleoside linkages include, for example, phosphoramidate or phosphorodiamidate internucleoside linkages joining the morpholine ring nitrogen of one morpholino subunit to the 4’ exocyclic carbon of an adjacent morpholino subunit. Each lino subunit comprises a purine or pyrimidine nucleobase ive to bind, by base-specific hydrogen g, to a base in an oligonucleotide.

Morpholino-based oligomers (including antisense oligomers) are detailed, for e, in U.S. Patent Nos. 5,698,685; 5,217,866; 047; 5,034,506; 5,166,315; 5,185,444; ,521,063; 5,506,337 and pending US Patent Application Nos. 12/271,036; 12/271,040; and PCT Publication No. 9/064471 and WO/2012/043730 and Summerton et al. 1997, Antisense and Nucleic Acid Drug Development, 7, 5, which are hereby incorporated by reference in their ty. Within the er structure, the phosphate groups are commonly referred to as forming the "internucleoside linkages" of the oligomer. The naturally occurring internucleoside linkage of RNA and DNA is a 3’ to 5’ phosphodiester linkage. A "phosphoramidate" group comprises phosphorus having three attached oxygen atoms and one attached nitrogen atom, while a "phosphorodiamidate" group comprises phosphorus having two attached oxygen atoms and two attached nitrogen atoms. In the uncharged or the cationic intersubunit es of morpholino-based oligomers described herein, one nitrogen is always pendant to the backbone chain. The second nitrogen, in a phosphorodiamidate linkage, is typically the ring nitrogen in a line ring structure. " refers to phosphorodiamidate morpholino-based oligomers having a phosphorus atom with (i) a covalent bond to the nitrogen atom of a morpholine ring and (ii) a second covalent bond to the ring nitrogen of a 4-aminopiperdinyl (i.e., APN) or a derivative of 4-aminopiperdinyl. Exemplary PMO-X oligomers are disclosed in PCT Application No. and PCT Publication No. by reference in their ty. PMO-X includes "PMO-apn" or "APN," which refers to a PMO-X oligomer which comprises at least one internucleoside linkage where a phosphorus atom is linked to a morpholino group and to the ring nitrogen of a 4-aminopiperdinyl (i.e., APN). In specific embodiments, an antisense oligomer sing a targeting sequence as set forth in Tables 2A, 2B, or 2C comprises at least one APN-containing linkage or APN tive- ning linkage. Various ments include morpholino-based oligomers that have about %, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or 100% APN/APN derivative-containing linkages, where the remaining linkages (if less than 100%) are uncharged linkages, e.g., about or at least about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, or 40 of the total ucleoside linkages are APN/APN derivative-containing linkages.

In some embodiments, the antisense oligomer is a compound of formula (I): or a pharmaceutically acceptable salt thereof, wherein: each Nu is a nucleobase which taken together form a targeting sequence; Z is an integer from 8 to 38; each Y is independently selected from O and –NR4, n each R4 is independently selected from H, C1-C6 alkyl, aralkyl, -C(=NH)NH2, CH2)nNR5C(=NH)NH2, -C(O)(CH2)2NHC(O)(CH2)5NR5C(=NH)NH2, and G, wherein R5 is selected from H and C1-C6 alkyl and n is an r from 1 to 5; T is selected from OH and a moiety of the formula: , wherein: A is selected from –OH, -N(R7)2, and R1 wherein each R7 is independently selected from H and C1-C6 alkyl, and R6 is selected from OH, –N(R9)CH2C(O)NH2, and a moiety of the formula: , wherein: R9 is selected from H and C1-C6 alkyl; and R10 is selected from G, -C(O)-R11OH, acyl, trityl, 4-methoxytrityl, -C(=NH)NH2, -C(O)(CH2)mNR12C(=NH)NH2, and -C(O)(CH2)2NHC(O)(CH2)5NR12C(=NH)NH2, wherein: m is an integer from 1 to 5, R11 is of the formula kyl)y- wherein y is an integer from 3 to and each of the y alkyl groups is independently selected from C2-C6 alkyl; and R12 is selected from H and C1-C6 alkyl; each instance of R1 is independently selected from : –N(R13)2, wherein each R13 is independently selected from H and C1-C6 alkyl; a moiety of formula (II): , wherein: R15 is selected from H, G, C1-C6 alkyl, -C(=NH)NH2, -C(O)(CH2)qNR18C(=NH)NH2, and -C(O)(CH2)2NHC(O)(CH2)5NR18C(=NH)NH2, wherein: R18 is selected from H and C1-C6 alkyl; and q is an integer from 1 to 5, and each R17 is independently selected from H and ; and a moiety of formula(III): , wherein: R19 is ed from H, C1-C6 alkyl, )NH2, -C(O)(CH2)rNR22C(=NH)NH2, -C(O)CH(NH2)(CH2)3NHC(=NH)NH2, -C(O)(CH2)2NHC(O)(CH2)5NR22C(=NH)NH2, -C(O)CH(NH2)(CH2)4NH2 and G, n: R22 is selected from H and C1-C6 alkyl; and r is an integer from 1 to 5, and R20 is selected from H and C1-C6 alkyl; or R19 and R20 together with the nitrogen atom to which they are attached form a heterocyclic or aryl ring having from 5 to 7 ring atoms and ally containing an additional heteroatom selected from oxygen, nitrogen, and sulfur; and R2 is selected from H, G, acyl, trityl, oxytrityl, benzoyl, stearoyl, C1-C6 alkyl, -C(=NH)NH2, R23, -C(O)(CH2)sNR24C(=NH)NH2, -C(O)(CH2)2NHC(O)(CH2)5NR24C(=NH)NH2, -C(O)CH(NH2)(CH2)3NHC(=NH)NH2, and a moiety of the formula: wherein, R23 is of the formula -(O-alkyl)v-OH wherein v is an integer from 3 to 10 and each of the v alkyl groups is independently selected from C2-C6 alkyl; R24 is selected from H and C1-C6 alkyl; s is an integer from 1 to 5; L is selected from –C(O)(CH2)6C(O)– and -C(O)(CH2)2S2(CH2)2C(O)–; each R25 is of the formula –(CH2)2OC(O)N(R26)2 wherein each R26 is of the formula –(CH2)6NHC(=NH)NH2, wherein G is a cell penetrating peptide ("CPP") and linker moiety selected from -C(O)(CH2)5NH-CPP, -C(O)(CH2)2NH-CPP, -C(O)(CH2)2NHC(O)(CH2)5NH-CPP, -C(O)CH2NH-CPP, and: wherein the CPP is attached to the linker moiety by an amide bond at the CPP carboxy terminus, and wherein G may be present in one occurance or is absent.

In some embodiments, R2 is a moiety of the a: where L is selected from -C(O)(CH2)6C(O)– or –C(O)(CH2)2S2(CH2)2C(O)– , and and each R25 is of the formula –(CH2)2OC(O)N(R26)2 wherein each R26 is of the formula -(CH2)6NHC(=NH)NH2. Such moieties are further described in U.S. Patent No. 7,935,816 incorporated herein by reference in its ty.

In certain embodiments, R2 may comprise either moiety ed below: In certain embodiments, each R1 is -N(CH3)2. In some embodiments, about 50 -90% of the R1 groups are dimethylamino (i.e. -N(CH3)2). In certain embodiments, about 66% of the R1 groups are ylamino.

In some non-limiting embodiments, the ing sequence is ed from the sequences of Tables 2A-2C, wherein X is selected from uracil (U) or thymine (T). In some non- limiting embodiments, each R1 is -N(CH3)2 and the targeting sequence is selected from the sequences of Table 2A-2C, wherein X is selected from uracil (U) or thymine (T).

In some embodiments of the disclosure, R1 may be selected from: In some embodiments, at least one R1 is: In n embodiments, T is selected from: ; ; ; and , and Y is O at each occurrence. In some embodiments, R2 is selected from H, G, acyl, trityl, 4-methoxytrityl, benzoyl, and stearoyl.

In various ments, T is selected from: ; ; and , Y is O at each occurrence and R2 is G.

In some embodiments, T is of the formula: R6 is of the formula: Y is O at each occurrence and R2 is G.

In certain embodiments, T is of the a: Y is O at each occurrence and R2 is G. In some embodiments, T is of the formula: Y is O at each occurrence, each R1 is –N(CH3)2, and R2 is G.

In certain embodiments, T is of the formula: and Y is O at each occurrence. In some embodiments, T is of the formula: Y is O at each ence, each R1 is –N(CH3)2, and R2 is acetyl.

In certain embodiments, T is of the formula: , Y is O at each occurrence, each R1 is –N(CH3)2, and R2 is H.

In some embodiments, R2 is ed from H, acyl, trityl, 4-methoxytrityl, benzoyl, and stearoyl.

In various embodiments, R2 is selected from H or G. In a particular embodiment, R2 is G.

In some embodiments, R2 is H or acyl. In some embodiments, each R1 is -N(CH3)2. In some embodiments, at least one instance of R1 is -N(CH3)2. In certain embodiments, each instance of R1 is -N(CH3)2.

In some embodiments, G is of the formula: wherein Ra is selected from H, acyl, benzoyl, and yl. In some embodiments, Ra is acetyl.

In certain embodiments, the CPP is of the formula: wherein Ra is selected from H, acyl, benzoyl, and stearoyl. In some embodiments, Ra is acetyl.

In another aspect, the antisense er is a compound of formula (Ia): or a pharmaceutically acceptable salt thereof, wherein: each Nu is a nucleobase which taken together form a targeting sequence; Z is an integer from about 13 to about 38; each Y is independently selected from O and –NR4, wherein each R4 is ndently selected from H, C1-C6 alkyl, l, -C(=NH)NH2, -C(O)(CH2)nNR5C(=NH)NH2, -C(O)(CH2)2NHC(O)(CH2)5NR5C(=NH)NH2, and G, wherein R5 is selected from H and C1-C6 alkyl and n is an integer from 1 to 5; T is selected from OH and a moiety of the formula: wherein: A is selected from –OH, -N(R7)2, and R1 wherein: each R7 is independently selected from H and C1-C6 alkyl, and R6 is selected from OH, –N(R9)CH2C(O)NH2, and a moiety of the formula: wherein: R9 is selected from H and C1-C6 alkyl; and R10 is selected from G, R11OH, acyl, trityl, 4-methoxytrityl, -C(=NH)NH2, -C(O)(CH2)mNR12C(=NH)NH2, and -C(O)(CH2)2NHC(O)(CH2)5NR12C(=NH)NH2, n: m is an integer from 1 to 5, R11 is of the formula -(O-alkyl)y- wherein y is an r from 3 to and each of the y alkyl groups is independently selected from C2-C6 alkyl; and R12 is selected from H and C1-C6 alkyl; each instance of R1 is independently selected from : –N(R13)2, wherein each R13 is independently selected from H and C1-C6 alkyl; a moiety of formula (II): wherein: R15 is selected from H, G, C1-C6 alkyl, -C(=NH)NH2, -C(O)(CH2)qNR18C(=NH)NH2, and -C(O)(CH2)2NHC(O)(CH2)5NR18C(=NH)NH2, wherein: R18 is selected from H and C1-C6 alkyl; and q is an integer from 1 to 5; and each R17 is independently selected from H and methyl; and a moiety of a(III): , R19 is selected from H, C1-C6 alkyl, -C(=NH)NH2, -C(O)(CH2)rNR22C(=NH)NH2, -C(O)CH(NH2)(CH2)3NHC(=NH)NH2, CH2)2NHC(O)(CH2)5NR22C(=NH)NH2, -C(O)CH(NH2)(CH2)4NH2 and G, wherein: R22 is selected from H and C1-C6 alkyl; and r is an integer from 1 to 5, and R20 is selected from H and C1-C6 alkyl; or R19 and R20 together with the nitrogen atom to which they are attached form a heterocyclic or heteroaryl ring having from 5 to 7 ring atoms and optionally containing an onal heteroatom selected from oxygen, nitrogen, and sulfur; and R2 is selected from H, G, acyl, trityl, 4-methoxytrityl, benzoyl, stearoyl, C1-C6 alkyl, -C(=NH)NH2, -C(O)-R23, -C(O)(CH2)sNR24C(=NH)NH2, -C(O)(CH2)2NHC(O)(CH2)5NR24C(=NH)NH2, -C(O)CH(NH2)(CH2)3NHC(=NH)NH2, and a moiety of the formula: wherein, R23 is of the a -(O-alkyl)v-OH wherein v is an integer from 3 to 10 and each of the v alkyl groups is independently selected from C2-C6 alkyl; and R24 is selected from H and C1-C6 alkyl; s is an integer from 1 to 5; L is selected from –C(O)(CH2)6C(O)– and -C(O)(CH2)2S2(CH2)2C(O)–; each R25 is of the formula –(CH2)2OC(O)N(R26)2 wherein each R26 is of the formula –(CH2)6NHC(=NH)NH2, wherein G is a cell ating peptide ("CPP") and linker moiety comprising the formula -C(O)CH2NH-CPP, where CPP is of the formula: wherein Ra is H or acyl, and wherein G may be present in one nce or is absent.

In certain embodiments, T is selected from: ; ; ; and , and Y is O at each occurrence. In some embodiments, R2 is selected from H, G, acyl, trityl, 4-methoxytrityl, benzoyl, and stearoyl.

In s embodiments, T is selected from: ; ; and , Y is O at each occurrence and R2 is G.

In some embodiments, T is of the formula: R6 is of the formula: Y is O at each occurrence and R2 is G.

In certain embodiments, T is of the formula: Y is O at each occurrence and R2 is G. In some embodiments, T is of the formula: Y is O at each occurrence, each R1 is –N(CH3)2, and R2 is G.

In certain embodiments, T is of the formula: and Y is O at each ence. In some embodiments, T is of the formula: Y is O at each occurrence, each R1 is –N(CH3)2, and R2 is acetyl.

In certain embodiments, T is of the formula: , Y is O at each ence, each R1 is –N(CH3)2, and R2 is H.

In some embodiments, R2 is ed from H, acyl, trityl, 4-methoxytrityl, benzoyl, and stearoyl.

In various embodiments, R2 is selected from H or G. In a particular embodiment, R2 is G.

In some embodiments, R2 is H or acyl. In some embodiments, each R1 is -N(CH3)2. In some embodiments, at least one instance of R1 is -N(CH3)2. In certain embodiments, each instance of R1 is -N(CH3)2.

In some embodiments, Ra is acetyl.

In some embodiments ing, for example, embodiments of the antisense oligomers of formula (I) and (Ia), the targeting ce is complementary to a target region within intron 1 (SEQ ID NO: 1) of a pre-mRNA of the human alpha glucosidase (GAA) gene. In various embodiments ing, for example, embodiments of the antisense oligomers of formula (I) and (Ia), the targeting ce is complementary to a target region within intron 1 (SEQ ID NO: 1) of a pre-mRNA of the human alpha glucosidase (GAA) gene, wherein the target region comprises at least one additional nucleobase compared to the targeting sequence, wherein the at least one additional nucleobase has no complementary nucleobase in the targeting sequence, and wherein the at least one additional nucleobase is internal to the target region. In certain embodiments, the targeting sequence comprises a sequence selected from SEQ ID NOs:13-86, as shown in Tables 2A-2C . In certain embodiments, the targeting sequence comprises a sequence selected from Tables 2A and 2B. In certain embodiments, the ing ce is ed from the group consisting of SEQ ID NOs: 13, 27-29, 34-36, 59, and 82. Further, and with respect to the sequences outlined in Tables 2A-2C (or Tables 2B and 2C) herein, in cetain embodiments, a sequence with 100% complementarity is selected and one or more nucleobases is removed (or alternately are synthesized with one or more missing bases) so that the resulting sequence has one or more missing nucleobases than its natural complement in the target region. With the exception of the portion where one or more nucleobases are removed, it is plated that the ing portions are 100% conmplementary. However, it is within the scope of this invention that decreased levels of complementarity could be present.

In certain embodiments, the antisense oligomer of the disclosure is a compound of formula (IVa): or a pharmaceutically acceptable salt thereof, wherein: each Nu is a nucleobase which taken together forms a targeting sequence; Z is an integer from 8 to 38; T is selected from OH and a moiety of the formula: wherein: A is selected from –OH, -N(R7)2R8, and R1 n: each R7 is independently selected from H and C1-C6 alkyl, and R8 is selected from an electron pair and H, and R6 is ed from OH, –N(R9)CH2C(O)NH2, and a moiety of the formula: wherein: R9 is ed from H and C1-C6 alkyl; and R10 is selected from -C(O)-R11OH, acyl, trityl, 4-methoxytrityl, -C(=NH)NH2, -C(O)(CH2)mNR12C(=NH)NH2, and -C(O)(CH2)2NHC(O)(CH2)5NR12C(=NH)NH2, wherein: m is an integer from 1 to 5, R11 is of the formula -(O-alkyl)y- wherein y is an integer from 3 to 10 and each of the y alkyl groups is independently selected from C2-C6 alkyl; and R12 is selected from H and C1-C6 alkyl; each instance of R1 is independently –N(R13)2R14, wherein each R13 is independently ed from H and C1-C6 alkyl, and R14 is selected from an electron pair and H; and R2 is selected from H, acyl, trityl, 4-methoxytrityl, benzoyl, stearoyl, and C1-C6 alkyl.

In certain embodiments, T is selected from: ; ; and , and Y is O at each occurrence. In some embodiments, R2 is selected from H, acyl, trityl, 4-methoxytrityl, benzoyl, and stearoyl.

In various embodiments, T is selected from: ; ; and .

In some embodiments, T is of the a: , and R6 is of the formula: In certain embodiments, T is of the formula: .

In some embodiments, R2 is H, trityl, or acyl. In some embodiments, at least one instance of R1 is -N(CH3)2. In some embodiments, each R 1 is -N(CH 3)2.

In certain embodiments, the nse oligomer of the disclosure is a compound of formula (IVb): or a pharmaceutically acceptable salt thereof, where: each Nu is a nucleobase which taken together forms a targeting ce; Z is an integer from 8 to 38; T is selected from a moiety of the formula: ; ; and , n R3 is selected from H and C1-C6 alkyl; each instance of R1 is independently –N(R4)2, wherein each R4 is independently selected from H and C1-C6 alkyl; and R2 is selected from H, acyl, trityl, 4-methoxytrityl, benzoyl, stearoyl, and C1-C6 alkyl.

In various ments, R2 is selected from H or acyl. In some embodiments, R2 is H.

In certain embodiments, T is of the formula: ; and R2 is hydrogen.

In certain embodiments, the antisense oligomer of the disclosure is a compound of formula (IVc): or a pharmaceutically acceptable salt f, wherein: each Nu is a nucleobase which taken together form a targeting sequence; Z is an integer from 8 to 38; each Y is O; each R1 is ndently selected from the group consisting of: wherein at least one R1 is –N(CH3)2.

In some embodiments, the targeting sequence is selected from SEQ ID NOS: 4 to 30, 133 to 255, or 296 to 342, wherein X is selected from uracil (U) or thymine (T). In some ments, each R1 is –N(CH3)2.

In certain embodiments, the antisense oligomer is a compound of formula (V): or a pharmaceutically acceptable salt thereof, wherein: each Nu is a nucleobase which taken er form a targeting sequence; and Z is an integer from 8 to 38.

In some ments including, for example, embodiments of the antisense oligomers of formula (IVa), (IVb), (IVc) and (V), the targeting sequence is complementary to a target region within intron 1 (SEQ ID NO: 1) of a pre-mRNA of the human alpha glucosidase (GAA) gene. In various embodiments including, for example, ments of the antisense oligomers of formula (IVa), (IVb), (IVc) and (V), the targeting sequence is complementary to a target region within intron 1 (SEQ ID NO: 1) of a pre-mRNA of the human alpha glucosidase (GAA) gene, wherein the target region comprises at least one additional nucleobase compared to the targeting sequence, wherein the at least one additional base has no complementary nucleobase in the targeting sequence, and wherein the at least one additional nucleobase is internal to the target region. In certain embodiments, the targeting ce comprises a sequence selected from SEQ ID NO: 13 – SEQ ID NO: 86, as shown in Tables 2A-2C herein.

In certain embodiments, the targeting sequence is ed from the group consisting of SEQ ID NOs: 13, 27-29, 34-36, 59, and 82. In n embodiments, the targeting sequence comprises a sequence selected from Tables 2A-2C. Further, and with respect to the sequences outlined in Tables 2A-2C (or Tables 2B and 2C) herein, in cetain embodiments, a sequence with 100% complementarity is ed and one or more nucleobases is removed (or alternately are synthesized with one or more missing nucleobases) so that the resulting sequence has one or more missing nucleobases than its natural complement in the target region. With the exception of the portion where one or more nucleobases are d, it is contemplated that the remaining portions are 100% conmplementary. However, it is within the scope of this invention that sed levels of complementarity could be present.

In certain embodiments, the antisense oligomer is a compound of a (VI): or a pharmaceutically acceptable salt thereof, where each Nu is a nucleobase which taken together forms a targeting sequence; Z is an integer from 8 to 38; T is selected from: ; ; ; and ; each R1 is independently selected from the group consisting of: R2 is selected from H, G, acyl, trityl, 4-methoxytrityl, benzoyl, and stearoyl, wherein G is a cell penetrating peptide ("CPP") and linker moiety ed from CH2)5NH-CPP, -C(O)(CH2)2NH-CPP, -C(O)(CH2)2NHC(O)(CH2)5NH-CPP, -C(O)CH2NH-CPP, and: wherein the CPP is attached to the linker moiety by an amide bond at the CPP carboxy terminus, and wherein T is or R2 is G.

In certain embodiments, T is of the formula: and R2 is G. In certain embodiments, at least one occurrence of R1 is –N(CH3)2. In some embodiments, each occurrence of R1 is –N(CH3)2. In some ments, T is of the formula: In certain embodiments, at least one occurrence of R1 is –N(CH3)2. In some embodiments, each occurrence of R1 is )2.

In some embodiments, T is of the formula: , R2 is G, and each occurrence of R1 is –N(CH3)2..

In certain embodiments, R2 is selected from H, acetyl, trityl, 4-methoxytrityl, benzoyl, and stearoyl and T is of the formula: . In various embodiments, R2 is acetyl. In certain embodiments, at least one ence of R1 is –N(CH3)2. In some ments, each occurrence of R 1 is –N(CH 3)2.

In various embodiments, R2 is selected from H, acyl, trityl, 4-methoxytrityl, benzoyl, and stearoyl.

In certain embodiments, R2 is acetyl, T is of the formula: , and each occurrence of R1 is –N(CH3)2.

In some embodiments, wherein G is of the formula: n Ra is selected from H, acyl, benzoyl, and stearoyl. In some embodiments, Ra is acetyl.

In some embodiments, the CPP is of the a: wherein Ra is selected from H, acyl, benzoyl, and stearoyl. In some embodiments, Ra is acetyl.

In certain embodiments, the antisense oligomer is a compound of formula (VII): or a pharmaceutically acceptable salt thereof, where each Nu is a nucleobase which taken together forms a targeting sequence; Z is an integer from 8 to 38; T is selected from: ; ; ; and ; each R1 is –N(R4)2 wherein each R4 is independently C1-C6 alkyl; and R2 is selected from H, G, acyl, , 4-methoxytrityl, benzoyl, and stearoyl, wherein G is a cell penetrating peptide ("CPP") and linker moiety selected from CH2)5NH-CPP, -C(O)(CH2)2NH-CPP, -C(O)(CH2)2NHC(O)(CH2)5NH-CPP, -C(O)CH2NH-CPP, and: wherein the CPP is attached to the linker moiety by an amide bond at the CPP carboxy terminus, and wherein T is or R2 is G.

In some embodiments, at least one instance of R1 is -N(CH3)2. In certain embodiments, each instance of R1 is -N(CH3)2.

In certain embodiments, T is of the formula: and R2 is G. In some embodiments, at least one ce of R1 is -N(CH3)2. In certain embodiments, each ce of R 1 is -N(CH3)2.

In various embodiments, G is of the formula: wherein Ra is ed from H, acyl, benzoyl, and stearoyl. In some embodiments, Ra is acetyl.

In certain embodiments, the CPP is of the formula: wherein Ra is selected from H, acetyl, benzoyl, and yl. In some embodiments, Ra is acetyl.

In certain embodiments, the antisense oligomer is a compound of formula (VIIa): or a pharmaceutically acceptable salt thereof, where each Nu is a nucleobase which taken together forms a ing sequence; Z is an integer from 8 to 38; T is selected from: ; ; and ; each instance of R1 is –N(R4)2 wherein each R4 is independently C1-C6 alkyl; and G is a cell penetrating peptide ("CPP") and linker moiety selected from -C(O)(CH2)5NH-CPP, -C(O)(CH2)2NH-CPP, -C(O)(CH2)2NHC(O)(CH2)5NH-CPP, -C(O)CH2NH-CPP, and: wherein the CPP is attached to the linker moiety by an amide bond at the CPP y terminus.

In some embodiments, at least one instance of R1 is -N(CH3)2. In certain embodiments, each ce of R1 is -N(CH3)2.

In some embodiments, G is of the formula: wherein Ra is selected from H, acyl, benzoyl, and stearoyl. In some ments, Ra is acetyl.

In various ments, each instance of R1 is -N(CH3)2, G is of the formula: , and Ra is acetyl.

In certain embodiments, the CPP is of the formula: wherein Ra is selected from H, acyl, benzoyl, and stearoyl. In some embodiments, Ra is acetyl. In various ments, each instance of R1 is -N(CH3)2, the CPP is of the formula: , and Ra is acetyl.

In various aspects, an antisense oligonucleotide of the disclosure includes a nd of formula (VIIb): or a pharmaceutically acceptable salt thereof, wherein: where each Nu is a nucleobase which taken together forms a targeting sequence; Z is an integer from 8 to 38; each instance of R1 is –N(R4)2 wherein each R4 is independently C1-C6 alkyl; and G is a cell penetrating peptide ) and linker moiety selected from -C(O)(CH2)5NH-CPP, -C(O)(CH2)2NH-CPP, -C(O)(CH2)2NHC(O)(CH2)5NH-CPP, -C(O)CH2NH-CPP, and: wherein the CPP is ed to the linker moiety by an amide bond at the CPP carboxy terminus.

In some embodiments, at least one instance of R1 is -N(CH3)2. In certain ments, each instance of R1 is -N(CH3)2.

In some embodiments, G is of the formula: wherein Ra is selected from H, acyl, benzoyl, and stearoyl. In some embodiments, Ra is .

In various embodiments, each instance of R1 is -N(CH3)2, G is of the formula: , and Ra is acetyl.

In certain embodiments, the CPP is of the formula: wherein Ra is selected from H, acyl, benzoyl, and stearoyl. In some ments, Ra is . In various embodiments, each instance of R1 is -N(CH3)2, the CPP is of the formula: , and Ra is acetyl.

In various aspects, an antisense oligonucleotide of the disclosure includes a compound of formula (VIIc): or a pharmaceutically acceptable salt thereof, wherein: where each Nu is a nucleobase which taken together forms a ing sequence; Z is an integer from 8 to 38; and G is a cell ating peptide ("CPP") and linker moiety selected from -C(O)(CH2)5NH-CPP, -C(O)(CH2)2NH-CPP, -C(O)(CH2)2NHC(O)(CH2)5NH-CPP, -C(O)CH2NH-CPP, and: wherein the CPP is attached to the linker moiety by an amide bond at the CPP carboxy terminus.

In some embodiments, G is of the formula: wherein Ra is selected from H, acyl, benzoyl, and stearoyl. In some ments, Ra is acetyl.

In various embodiments, G is of the formula: , and Ra is acetyl.

In certain embodiments, the CPP is of the formula: wherein Ra is selected from H, acyl, benzoyl, and stearoyl. In some embodiments, Ra is acetyl. In various embodiments, the CPP is of the formula: , and Ra is acetyl.

In s aspects, an antisense oligomer of the disclosure is a compound of formula (VIId): wherein: each Nu is a nucleobase which taken together forms a targeting ce; Z is an integer from 8 to 38; each instance of R1 is –N(R4)2 wherein each R4 is independently C1-C6 alkyl; and R2 is selected from H, trityl, 4-methoxytrityl, acetyl, benzoyl, and stearoyl; and G is a cell penetrating peptide ) and linker moiety selected from -C(O)(CH2)5NH-CPP, -C(O)(CH2)2NH-CPP, -C(O)(CH2)2NHC(O)(CH2)5NH-CPP, -C(O)CH2NH-CPP, and: , wherein the CPP is attached to the linker moiety by an amide bond at the CPP carboxy terminus..

In some embodiments, at least one instance of R1 is -N(CH3)2. In certain embodiments, each ce of R1 is -N(CH3)2.

In some ments, G is of the formula: wherein Ra is selected from H, acyl, benzoyl, and stearoyl. In some embodiments, Ra is acetyl.

In various embodiments, each instance of R1 is -N(CH3)2, G is of the formula: , and Ra is .

In certain embodiments, the CPP is of the formula: wherein Ra is selected from H, acyl, benzoyl, and stearoyl. In some embodiments, Ra is acetyl. In various embodiments, each instance of R1 is -N(CH3)2, the CPP is of the formula: , and Ra is acetyl.

In various aspects, an antisense ucleotide of the sure includes a compound of formula (VIIe): or a pharmaceutically able salt thereof, wherein: each Nu is a nucleobase which taken together forms a targeting sequence; Z is an integer from 8 to 38; R2 is selected from H, trityl, 4-methoxytrityl, acetyl, l, and stearoyl,; and G is a cell penetrating peptide ("CPP") and linker moiety selected from -C(O)(CH2)5NH-CPP, -C(O)(CH2)2NH-CPP, CH2)2NHC(O)(CH2)5NH-CPP, -C(O)CH2NH-CPP, and: wherein the CPP is attached to the linker moiety by an amide bond at the CPP carboxy terminus.

In some embodiments, G is of the formula: n Ra is selected from H, acyl, benzoyl, and stearoyl. In some embodiments, Ra is acetyl.

In various embodiments, G is of the formula: , and Ra is acetyl.

In certain embodiments, the CPP is of the formula: wherein Ra is selected from H, acyl, benzoyl, and stearoyl. In some embodiments, Ra is acetyl. In various embodiments, the CPP is of the formula: , and Ra is .

In some embodiments including, for example, embodiments of the antisense oligomers of a (VI), (VII), (VIIa), (VIIb), (VIIc), (VIId), (VIIe), and (VIII), the targeting sequence is complementary to a target region within intron 1 (SEQ ID NO: 1) of a NA of the human alpha glucosidase (GAA) gene. In various embodiments including, for example, embodiments of the antisense oligomers of formula (VI), (VII), (VIIa), (VIIb), (VIIc), , (VIIe), and (VIII), the targeting sequence is complementary to a target region within intron 1 (SEQ ID NO: 1) of a premRNA of the human alpha glucosidase (GAA) gene, wherein the target region comprises at least one additional nucleobase compared to the targeting sequence, n the at least one onal nucleobase has no complementary nucleobase in the targeting sequence, and n the at least one additional nucleobase is internal to the target region. In n embodiments, the targeting sequence comprises a sequence selected from SEQ ID NO: 13 – SEQ ID NO: 86 (e.g., SEQ ID NOS: 13-58 or 59-75). In certain embodiments, the targeting sequence is ed from the group consisting of SEQ ID NOs: 13, 27-29, 34-36, 59, and 82. In certain embodiments, the targeting ce comprises a sequence selected from Tables 2A-2C. Further, and with respect to the sequences outlined in Tables 2A-2C , in cetain embodiments, a sequence with 100% complementarity is selected and one or more nucleobases is removed (or alternately are synthesized with one or more missing nucleobases) so that the resulting sequence has one or more missing nucleobases than its natural complement in the target region. With the exception of the portion where one or more nucleobases are removed, it is contemplated that the remaining portions are 100% conmplementary. However, it is within the scope of this invention that sed levels of complementarity could be present.

In some embodiments of any of the antisense ers, methods, or compositions described , Z is an integer from 8 to 28, from 15 to 38, 15 to 28, 8 to 25, from 15 to 25, from to 38, from 10 to 25, from 12 to 38, from 12 to 25, from 14 to 38, or from 14 to 25. In some embodiments of any of the antisense oligomers, methods, or compositions described herein, Z is 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, or 38. In some embodiments of any of the antisense oligomers, methods, or compositions bed herein, Z is 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, or 28. In some embodiments of any of the antisense oligomers, methods, or compositions described herein, Z is , 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25.

In some embodiments, each Z of the modified antisense oligomers of the disclosure, including compounds of formulas (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), , (VIIc), (VIId), (VIIe), and (VIII), is an integer from 8 to 28.

In some embodiments, each Z of the modified antisense oligomers of the disclosure, including compounds of formulas (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), (VIIb), (VIIc), , (VIIe), and (VIII), is an integer from 15 to 38.

In some embodiments, each Z of the modified antisense oligomers of the disclosure, including compounds of formulas (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), (VIIb), (VIIc), (VIId), (VIIe), and , is an r from 15 to 28.

In some embodiments, each Z of the modified antisense oligomers of the disclosure, including compounds of formulas (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), (VIIb), (VIIc), (VIId), (VIIe), and (VIII), is an integer from 8 to 25.

In some embodiments, each Z of the modified antisense oligomers of the disclosure, including compounds of formulas (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), (VIIb), (VIIc), (VIId), (VIIe), and (VIII), is an r from 15 to 25.

In some embodiments, each Z of the modified antisense oligomers of the disclosure, including compounds of formulas (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), , (VIIb), (VIIc), (VIId), (VIIe), and (VIII), is an integer from 10 to 38.

In some embodiments, each Z of the modified antisense ers of the disclosure, ing compounds of as (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), , (VIIc), (VIId), (VIIe), and (VIII), is an integer from 10 to 25.

In some ments, each Z of the modified antisense oligomers of the disclosure, including compounds of formulas (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), (VIIb), (VIIc), (VIId), (VIIe), and , is an integer from 12 to 38.

In some ments, each Z of the modified antisense oligomers of the sure, including compounds of formulas (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), (VIIb), (VIIc), (VIId), (VIIe), and (VIII), is an integer from 12 to 25.

In some embodiments, each Z of the modified antisense oligomers of the disclosure, ing compounds of formulas (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), (VIIb), (VIIc), (VIId), (VIIe), and (VIII), is an integer from 14 to 38.

In some ments, each Z of the modified antisense oligomers of the disclosure, including compounds of formulas (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), (VIIb), (VIIc), (VIId), (VIIe), and (VIII), is an integer from 14 to 25.

In some embodiments, each Z of the modified antisense oligomers of the disclosure, including compounds of as (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), (VIIb), , (VIId), (VIIe), and (VIII), is 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, or 38.

In some embodiments, each Z of the modified antisense oligomers of the disclosure, including compounds of formulas (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), (VIIb), (VIIc), (VIId), (VIIe), and (VIII), is 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, or 28.

In some embodiments, each Z of the modified antisense oligomers of the disclosure, including compounds of formulas (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), (VIIb), (VIIc), , (VIIe), and (VIII), is 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25.

In some embodiments, each Nu of the antisense oligomers of the disclosure, including compounds of formula (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), (VIIb), , , , and (VIII), is independently selected from the group consisting of adenine, guanine, thymine, uracil, cytosine, hypoxanthine, 2,6-diaminopurine, 5-methyl cytosine, C5- propynyl-modifed pyrimidines, and 9-(aminoethoxy)phenoxazine.

In some ments, the targeting sequence of the antisense oligomers of the disclosure, including compounds of formula (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), (VIIb), (VIIc), (VIId), (VIIe), and (VIII), is complementary 10 or more contiguous nucleotides in a target region within intron 1 (SEQ ID. NO. 1), intron 2 (SEQ ID. NO. 60), or exon 2 (SEQ ID. NO. 61) of a pre-mRNA of the human acid alpha-glucosidase (GAA) gene. In certain embodiments, the targeting ce of the nse oligomers of the disclosure, including compounds of formula (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), (VIIb), , , (VIIe), and (VIII), comprises a sequence selected from the sequences of Tables 2A-2C, as described herein, is a fragment of at least 12 contiguous nucleotides of a sequence ed from Tables 2A-2C, as described herein, or is variant having at least 90% sequence identity to a sequence selected from Tables 2A-2C, as described herein (where X is selected from uracil (U) or thymine (T) as applicable depending on the nced Table). In certain embodiments, the targeting ce is selected from the group consisting of SEQ ID NOs: 13, 27-29, 34-36, 59, and 82. onal antisense oligomers/chemistries that can be used in accordance with the present disclosure include those described in the following patents and patent publications, the contents of which are incorporated herein by reference: PCT Publication Nos.

WO/2007/002390; WO/2010/120820; and WO/2010/148249; U.S. Patent No. 7,838,657; and U.S. Application No. 269820.

The antisense oligonucleotides can be ed by stepwise solid-phase synthesis, employing methods known in the art and bed in the references cited herein.

C. CPPs and Arginine-Rich Peptide Conjugates of PMOs ) In certain embodiments, the antisense ucleotide is conjugated to a cell-penetrating peptide (referred to herein as "CPP"). In some embodiments, the CPP is an arginine-rich peptide. The term "arginine-rich" refers to a CPP having at least 2, and preferably 2, 3, 4, 5, 6, 7, or 8 arginine residues, each optionally ted by one or more uncharged, hydrophobic residues, and optionally containing about 6-14 amino acid residues. As explained below, a CPP is preferably linked at its carboxy terminus to the 3’ and/or 5’ end of an antisense oligonucleotide through a linker, which may also be one or more amino acids, and is preferably also capped at its amino terminus by a substituent Ra with Ra selected from H, acyl, benzoyl, or stearoyl. In some embodiments, Ra is acetyl.

As seen in the table below, Non-limiting examples of CPP’s for use herein include – -Ra, R-(FFR)3-Ra, -B-X-(RXR)4-Ra, -B-X-R-(FFR)3-Ra, -GLY-R-(FFR)3-Ra, -GLY-R6- Ra and –R6-Ra, wherein Ra is selected from H, acyl, benzoyl, and stearoyl, and wherein R is arginine, X is 6-aminohexanoic acid, B is β-alanine, F is phenylalanine and GLY (or G) is glycine. The CPP "R6" is meant to indicate a peptide of six (6) arginine residues linked together via amide bonds (and not a single substituent e.g. R6). In some embodiments, Ra is acetyl.

Exemplary CPPs are provided in Table 2D (SEQ ID NOS:6-12).

Table 2D: Exemplary Cell-Penetrating Peptides Name Sequence SEQ ID NO: (RXR)4 RXRRXRRXRRXR 6 (RFF)3R RFFRFFRFFR 7 (RXR)4XB RXRRXRRXRRXRXB 8 (RFF)3RXB RFFRFFRFFRXB 9 (RFF)3RG RFFR 10 R6G G 11 R6 RRRRRR 12 X is 6-aminohexanoic acid; B is β-alanine; F is phenylalanine; G is glycine CPPs, their synthesis, and methods of conjugating to an er are further bed in U.S. Application Publication No. 2012/0289457 and International Patent Application ation Nos. which are incorporated herein by reference in their ty.

In some embodiments, an antisense oligonucleotide comprises a substituent "G," defined as the combination of a CPP and a linker. The linker bridges the CPP at its carboxy terminus to the 3’-end and/or the 5’-end of the oligonucleotide. In various embodiments, an antisense oligonucleotide may comprise only one CPP linked to the 3’ end of the oligomer. In other embodiments, an antisense oligonucleotide may comprise only one CPP linked to the 5’ end of the oligomer.

The linker within G may comprise, for example, 1, 2, 3, 4, or 5 amino acids.

In particular embodiments, G is selected from: -C(O)(CH2)5NH-CPP; -C(O)(CH2)2NH-CPP; -C(O)(CH2)2NHC(O)(CH2)5NH-CPP; -C(O)CH2NH-CPP, and the formula: wherein the CPP is attached to the linker moiety by an amide bond at the CPP carboxy terminus.

In various embodiments, the CPP is an arginine-rich peptide as defined above and seen in Table 2D. In certain embodiments, the arginine -rich CPP is -R6-Ra, (i.e., six arginine residues; SEQ ID NO: 12), n Ra is selected from H, acyl, l, and stearoyl. Ra is acetyl. In various embodiments, the CPP is selected from SEQ ID NOS: 6, 7, or 12, and the linker is selected from the group described above. In some embodiments, the CPP is SEQ ID NO: 12 and the linker is Gly.

In certain embodiments, G is H2NH-R6-Ra covalently bonded to an antisense oligomer of the disclosure at the 5’ and/or 3’ end of the oligomer, wherein Ra is H, acyl, benzoyl, or yl to cap the amino terminus of the R6. Ra is acetyl. In these non-limiting example, the CPP is –R6-Ra and the linker is -C(O)CH2NH-, (i.e. GLY). This particular example of G = -C(O)CH2NH-R6-Ra is also exemplified by the following structure: n Ra is selected from H, acyl, benzoyl, and stearoyl. In some embodiments, G is ed from SEQ ID NOS: 3-6. In certain embodiments, G is SEQ ID NO: 6. In some embodiments, Ra is acetyl.

In various ments, the CPP is -R6-Ra, also exemplified as the following formula: wherein Ra is selected from H, acyl, benzoyl, and stearoyl. In certain embodiments, the CPP is SEQ ID NO: XX. In some embodiments, Ra is acetyl.

In some embodiments, the CPP is –(RXR)4-Ra, also exemplified as the following formula: In various embodiments, the CPP is –R-(FFR)3-Ra, also exemplified as the following formula: In various ments, G is selected from: -C(O)(CH2)5NH-CPP; -C(O)(CH2)2NH-CPP; -C(O)(CH2)2NHC(O)(CH2)5NH-CPP; -C(O)CH2NH-CPP, and the a: , wherein the CPP is attached to the linker moiety by an amide bond at the CPP carboxy terminus, and wherein the CPP is selected from: , (-R-(FFR)3-Ra), , )4-Ra), or , (-R6-Ra). In some embodiments, Ra is acetyl In some embodiments, an antisense oligomer of the disclosure is a compound of formula (VIII) selected from: or a ceutically acceptable salt of either of the foregoing, n: each Nu is a purine or pyrimidine base-pairing moiety which taken together form a targeting sequence; Z is an integer from 8 to 38; Ra is selected from H, acetyl, benzoyl, and stearoyl; and Rb is ed from H, acetyl, benzoyl, stearoyl, trityl, and 4-methoxytrityl.

In some embodiments, including, for example, embodiments of the antisense oligomers of formula (VIII), the targeting ce is complementary to a target region within intron 1 (SEQ ID NO: 1) of a pre-mRNA of the human alpha glucosidase (GAA) gene.

In various embodiments, including, for example, embodiments of the nse oligomers of a (VIII), the targeting sequence is complementary to a target region within intron 1 (SEQ ID NO: 1) of a pre-mRNA of the human alpha glucosidase (GAA) gene, wherein the target region comprises at least one additional nucleobase compared to the targeting sequence, wherein the at least one additional nucleobase has no complementary nucleobase in the targeting sequence, and n the at least one additional nucleobase is internal to the target region. In certain embodiments, the targeting sequence comprises a sequence selected from SEQ ID NO: 13 – SEQ ID NO: 86 (e.g., any one of SEQ ID NOs: 13-58 or 59-75). In certain embodiments, the targeting sequence comprises a sequence selected from Tables 2A-2C. In n embodiments, the targeting ce comprises a sequence selected from Tables 2A and 2B. Further, and with respect to the sequences outlined in Tables 2A-2C herein, in cetain embodiments, a ce with 100% complementarity is selected and one or more nucleobases is removed (or alternately are synthesized with one or more missing nucleobases) so that the resulting sequence has one or more missing nucleobases than its natural complement in the target region. With the exception of the portion where one or more nucleobases are removed, it is contemplated that the remaining portions are 100% conmplementary. r, it is within the scope of this invention that decreased levels of complementarity could be t.

In some embodiments, the ing sequence of an antisense oligomers of the disclosure, ing, for example, some embodiments of the antisense oligomers of formula (I), (Ia), (IVa), (IVb), (IVc), (V), (VI), (VII), (VIIa), , (VIIc), (VIId), (VIIe), and (VIII), is selected from the ces outlined in Tables 2A-2C, as described herein, and as follows: uu) SEQ ID NO: 13 (GGC CAG AAG GAA GGC GAG AAA AGC) wherein Z is 22; vv) SEQ ID NO: 14 (GCC AGA AGG AAG GC GAG AAA AGC X) wherein Z is 22; ww) SEQ ID NO: 15 (CCA GAA GGA AGG CGA GAA AAG CXC) wherein Z is 22; xx) SEQ ID NO: 16 (CAG AAG GAA GGC GAG AAA AGC XCC) wherein Z is 22; yy) SEQ ID NO: 17 (AGA AGG AAG GCG AGA AAA GCX CCA) wherein Z is 22; zz) SEQ ID NO: 18 (GAA GGA AGG CGA GAA AAG CXC CAG) wherein Z is 22; aaa) SEQ ID NO: 19 (AAG GAA GGC GAG AAA AGC XCC AGC) wherein Z is 22; bbb) SEQ ID NO: 20 (AGG AAG GCG AGA AAA GCX CCA GCA) wherein Z is 22; ccc) SEQ ID NO: 21 (CGG CXC XCA AAG CAG CXC XGA GA) wherein Z is 21; ddd) SEQ ID NO: 22 (ACG GCX CXC AAA GCA GCX CXG AG) wherein Z is 21; eee) SEQ ID NO: 23 (CAC GGC XCX CAA AGC AGC XCX GA) wherein Z is 21; fff) SEQ ID NO: 24 (XCA CGG CXC XCA AAG CAG CXC XG) wherein Z is 21; ggg) SEQ ID NO: 25 (CXC ACG GCX CXC AAA GCA GCX CX) wherein Z is 21; hhh) SEQ ID NO: 26 (ACX CAC GGC XCX CAA AGC AGC XC) wherein Z is 21; iii) SEQ ID NO: 27 (GCG GCA CXC ACG GCX CXC AAA GC) wherein Z is 21; jjj) SEQ ID NO: 28 (GGC GGC ACX CAC GGC XCX CAA AG) wherein Z is 21; kkk) SEQ ID NO: 29 (CGG CAC XCA CGG CXC XCA AAG CA) wherein Z is 21; lll) SEQ ID NO: 30 (GCA CXC ACG GCX CXC AAA GCA GC) wherein Z is 21; mmm) SEQ ID NO: 31 (GGC ACX CAC GGC XCX CAA AGC AG) wherein Z is 21; nnn) SEQ ID NO: 32 (CAC XCA CGG CXC XCA AAG CAG CX) wherein Z is 21; ooo) SEQ ID NO: 33 (GCC AGA AGG AAG GCG AGA AAA GC) wherein Z is 21; ppp) SEQ ID NO: 34 (CCA GAA GGA AGG CGA GAA AAG C) wherein Z is 19; qqq) SEQ ID NO: 35 (CAG AAG GAA GGC GAG AAA AGC) wherein Z is 19; rrr) SEQ ID NO: 36 (GGC CAG AAG GAA GGC GAG AAA AG) wherein Z is 21; sss) SEQ ID NO: 37 (GGC CAG AAG GAA GGC GAG AAA A) wherein Z is 19; ttt) SEQ ID NO: 38 (GGC CAG AAG GAA GGC GAG AAA) wherein Z is 19; uuu) SEQ ID NO: 39 (CGG CAC XCA CGGC XCX CAA AGC A) wherein Z is 21; vvv) SEQ ID NO: 40 (GCG GCA CXC ACGG CXC XCA AAG C) wherein Z is 21; www) SEQ ID NO: 41 (GGC GGC ACX CAC G GCX CXC AAA G) wherein Z is 21; xxx) SEQ ID NO: 42 (XGG GGA GAG GGC CAG AAG GAA GGC) wherein Z is 22; yyy) SEQ ID NO: 43 (XGG GGA GAG GGC CAG AAG GAA GC) wherein Z is 21; zzz) SEQ ID NO: 44 (XGG GGA GAG GGC CAG AAG GAA C) n Z is 20; aaaa) SEQ ID NO: 45 (GGC CAG AAG GAA GCG AGA AAA GC) wherein Z is 21; bbbb) SEQ ID NO: 46 (GGC CAG AAG GAA CGA GAA AAG C) wherein Z is 20; cccc) SEQ ID NO: 47 (AGG AAG CGA GAA AAG CXC CAG CA) wherein Z is 21; dddd) SEQ ID NO: 48 (AGG AAC GAG AAA AGC XCC AGC A) wherein Z is 20; eeee) SEQ ID NO: 49 (CGG GCX CXC AAA GCA GCX CXG AGA) wherein Z is 22; ffff) SEQ ID NO: 50 (CGC XCX CAA AGC AGC XCX GAG A) n Z is 20; gggg) SEQ ID NO: 51 (CCX CXC AAA GCA GCX CXG AGA) wherein Z is 19; hhhh) SEQ ID NO: 52 (GGC GGC ACX CAC GGG CXC XCA AAG) wherein Z is 22; iiii) SEQ ID NO: 53 (GGC GGC ACX CAC GCX CXC AAA G) wherein Z is 20; jjjj) SEQ ID NO: 54 (GGC GGC ACX CAC CXC XCA AAG) wherein Z is 19; kkkk) SEQ ID NO: 55 (GCG GGA GGG GCG GCA CXC ACG GGC) wherein Z is 22; llll) SEQ ID NO: 56 (GCG GGA GGG GCG GCA CXC ACG GC) wherein Z is 21; mmmm) SEQ ID NO: 57 (GCG GGA GGG GCG GCA CXC ACG C) wherein Z is 20; nnnn) SEQ ID NO: 58 (GCG GGA GGG GCG GCA CXC ACC) wherein Z is 19, wherein X is selected from uracil (U) or thymine (T); r) SEQ ID NO: 59 (GGC CAG AAG GAA GGG CGA GAA AAG C) wherein Z is 23; s) SEQ ID NO: 60 (CCA GAA GGA AGG GCG AGA AAA GCX C) wherein Z is 23; t) SEQ ID NO: 61 (AAG GAA GGG CGA GAA AAG CXC CAG C) wherein Z is 23; u) SEQ ID NO: 62 (GCG GGA GGG GCG GCA CXC ACG GGG C) wherein Z is 23; v) SEQ ID NO: 63 (XGG GGA GAG GGC CAG AAG GAA GGG C) wherein Z is 23; w) SEQ ID NO: 64 (AGA AGG AAG GGC GAG AAA AGC XCC A) wherein Z is 23; x) SEQ ID NO: 65 (GCX CXC AAA GCA GCX CXG AGA CAX C) n Z is 23; y) SEQ ID NO: 66 (CXC XCA AAG CAG CXC XGA GAC AXC A) wherein Z is 23; z) SEQ ID NO: 67 (XCX CAA AGC AGC XCX GAG ACA XCA A) wherein Z is 23; aa) SEQ ID NO: 68 (CXC AAA GCA GCX CXG AGA CAX CAA C) wherein Z is 23; bb) SEQ ID NO: 69 (XCA AAG CAG CXC XGA GAC AXC AAC C) wherein Z is 23; cc) SEQ ID NO: 70 (CAA AGC AGC XCX GAG ACA XCA ACC G) wherein Z is 23; dd) SEQ ID NO: 71 (AAA GCA GCX CXG AGA CAX CAA CCG C) wherein Z is 23; ee) SEQ ID NO: 72 (AAG CAG CXC XGA GAC AXC AAC CGC G) wherein Z is 23; ff) SEQ ID NO: 73 (AGC AGC XCX GAG ACA XCA ACC GCG G) wherein Z is 23; gg) SEQ ID NO: 74 (GCA GCX CXG AGA CAX CAA CCG CGG C) wherein Z is 23; and hh) SEQ ID NO: 75 (CAG CXC XGA GAC AXC AAC CGC GGC X) wherein Z is 23, wherein X is selected from uracil (U) or thymine (T); and l) SEQ ID NO: 76 (GCC AGA AGG AAG GGC GAG AAA AGC X) wherein Z is 23; m) SEQ ID NO: 77 (CAG AAG GAA GGG CGA GAA AAG CXC C) wherein Z is 23; n) SEQ ID NO: 78 (GAA GGA AGG GCG AGA AAA GCX CCA G) wherein Z is 23; o) SEQ ID NO: 79 (AGG AAG GGC GAG AAA AGC XCC AGC A) wherein Z is 23; p) SEQ ID NO: 80 (ACX CAC GGG GCX CXC AAA GCA GCX C) wherein Z is 23; q) SEQ ID NO: 81 XCAAAGCAGCXCXGAGACAX) wherein Z is 23; r) SEQ ID NO: 82 (GGC XCX CAA AGC AGC XCX GA) wherein Z is 18; s) SEQ ID NO: 83 (GAG AGG GCC AGA AGG AAG GG) wherein Z is 18; t) SEQ ID NO: 84 (XXX GCC AXG XXA CCC AGG CX) wherein Z is 18; u) SEQ ID NO: 85 (GCG CAC CCX CXG CCC XGG CC) n Z is 18; and v) SEQ ID NO: 86 (GGC CCX GGX CXG CXG GCX CCC XGC X) wherein Z is 23, wherein X is selected from uracil (U) or e (T).

In certain ments, the targeting sequence is selected from the group consisting of SEQ ID NOs: 13, 27-29, 34-36, 59, and 82. In certain embodiments, the targeting sequence is selected from the group consisting of SEQ ID NOs: 13, 27-29, 34-36, and 59. In certain embodiments, the targeting sequence is selected from the group consisting of SEQ ID NOs: 13, 27-29, and 34-36. In certain embodiments, each instance of X in any one of SEQ ID NOs: 13, 27- 29, 34-36, 59, and 82 is T.

In some embodiments, the targeting sequence of the antisense oligomer compound of formula (I) is selected from the ces outlined in Tables 2A-2C. In some embodiments, the ing sequence of the antisense oligomer compound of formula (Ia) is selected from the sequences outlined in Tables 2A-2C. In some embodiments, the targeting ce of the antisense oligomer compound of formula (IVa) is selected from the ces outlined in Tables 2A-2C. In some embodiments, the targeting sequence of the antisense oligomer compound of formula (IVb) is selected from the sequences outlined in Tables 2A-2C. In some embodiments, the targeting sequence of the antisense oligomer compound of formula (IVc) is selected from the sequences ed in Tables 2A-2C. In some embodiments, the targeting sequence of the antisense oligomer compound of formula (V) is selected from the ces ed in Tables 2A-2C. In some embodiments, the targeting sequence of the antisense oligomer compound of formula (VI) is selected from the sequences outlined in Tables 2A-2C. In some embodiments, the targeting sequence of the antisense oligomer compound of formula (VII) is selected from the sequences ed in Tables 2A-2C. In some ments, the targeting sequence of the antisense oligomer compound of formula (VIIa) is selected from the sequences outlined in Tables 2A-2C. In some embodiments, the targeting sequence of the antisense oligomer compound of formula (VIIb) is selected from the sequences outlined in Tables 2A-2C. In some embodiments, the targeting ce of the antisense oligomer compound of formula (VIIc) is selected from the sequences outlined in Tables 2A-2C. In some embodiments, the targeting sequence of the antisense oligomer compound of formula (VIId) is selected from the ces outlined in Tables 2A-2C. In some embodiments, the targeting sequence of the antisense oligomer compound of formula (VIIe) is selected from the sequences outlined in Tables 2A-2C.

In some embodiments, the targeting ce of the antisense oligomer compound of formula (VIII) is selected from the sequences outlined in Tables 2A-2C.

In some ments, at least one X of sequences outlined in Tables 2A-2C is T. In some embodiments, at least one X of sequences outlined in Tables 2A-2C is U. In some ments, each X of ces outlined in Tables 2A-2C is T. In some embodiments, each X of sequences outlined in Tables 2A-2C is U. In various embodiments, at least one X of the ing sequence is T. In s embodiments, each X of the targeting sequence is T. In various embodiments, at least one X of the targeting sequence is U. In various embodiments, each X of the targeting sequence is U.

Further, in some embodiments, an antisense oligomer of the disclosure is a compound of formula (XX): or a pharmaceutically acceptable salt thereof, wherein: a) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 13 (GGC CAG AAG GAA GGC GAG AAA AGC) wherein Z is 22; b) each Nu is a base which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 14 (GCC AGA AGG AAG GC GAG AAA AGC X) wherein Z is 22; c) each Nu is a nucleobase which taken er form the targeting sequence (5’ to 3’) of: SEQ ID NO: 15 (CCA GAA GGA AGG CGA GAA AAG CXC) wherein Z is 22; d) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 16 (CAG AAG GAA GGC GAG AAA AGC XCC) n Z is 22; e) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 17 (AGA AGG AAG GCG AGA AAA GCX CCA) wherein Z is 22; f) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 18 (GAA GGA AGG CGA GAA AAG CXC CAG) wherein Z is 22; g) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 19 (AAG GAA GGC GAG AAA AGC XCC AGC) wherein Z is 22; h) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 20 (AGG AAG GCG AGA AAA GCX CCA GCA) wherein Z is 22; i) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 21 (CGG CXC XCA AAG CAG CXC XGA GA) wherein Z is 21; j) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 22 (ACG GCX CXC AAA GCA GCX CXG AG) wherein Z is 21; k) each Nu is a base which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 23 (CAC GGC XCX CAA AGC AGC XCX GA) wherein Z is 21; l) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 24 (XCA CGG CXC XCA AAG CAG CXC XG) wherein Z is 21; m) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 25 (CXC ACG GCX CXC AAA GCA GCX CX) wherein Z is 21; n) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 26 (ACX CAC GGC XCX CAA AGC AGC XC) wherein Z is 21; o) each Nu is a base which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 27 (GCG GCA CXC ACG GCX CXC AAA GC) wherein Z is 21; p) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 28 (GGC GGC ACX CAC GGC XCX CAA AG) wherein Z is 21; q) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 29 (CGG CAC XCA CGG CXC XCA AAG CA) wherein Z is 21; r) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 30 (GCA CXC ACG GCX CXC AAA GCA GC) wherein Z is 21; s) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 31 (GGC ACX CAC GGC XCX CAA AGC AG) wherein Z is 21; t) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 32 (CAC XCA CGG CXC XCA AAG CAG CX) wherein Z is 21; u) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 33 (GCC AGA AGG AAG GCG AGA AAA GC) wherein Z is 21; v) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 34 (CCA GAA GGA AGG CGA GAA AAG C) wherein Z is 19; w) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 35 (CAG AAG GAA GGC GAG AAA AGC) wherein Z is 19; x) each Nu is a nucleobase which taken er form the targeting sequence (5’ to 3’) of: SEQ ID NO: 36 (GGC CAG AAG GAA GGC GAG AAA AG) wherein Z is 21; y) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 37 (GGC CAG AAG GAA GGC GAG AAA A) wherein Z is 19; z) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 38 (GGC CAG AAG GAA GGC GAG AAA) wherein Z is 19; aa) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 39 (CGG CAC XCA CGGC XCX CAA AGC A) wherein Z is 21; bb) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 40 (GCG GCA CXC ACGG CXC XCA AAG C) wherein Z is 21; cc) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 41 (GGC GGC ACX CAC G GCX CXC AAA G) wherein Z is 21; dd) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 42 (XGG GGA GAG GGC CAG AAG GAA GGC) wherein Z is 22; ee) each Nu is a nucleobase which taken er form the targeting sequence (5’ to 3’) of: SEQ ID NO: 43 (XGG GGA GAG GGC CAG AAG GAA GC) wherein Z is 21; ff) each Nu is a nucleobase which taken er form the targeting sequence (5’ to 3’) of: SEQ ID NO: 44 (XGG GGA GAG GGC CAG AAG GAA C) wherein Z is 20; gg) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 45 (GGC CAG AAG GAA GCG AGA AAA GC) wherein Z is 21; hh) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 46 (GGC CAG AAG GAA CGA GAA AAG C) wherein Z is 20; ii) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 47 (AGG AAG CGA GAA AAG CXC CAG CA) wherein Z is 21; jj) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 48 (AGG AAC GAG AAA AGC XCC AGC A) wherein Z is 20; kk) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 49 (CGG GCX CXC AAA GCA GCX CXG AGA) wherein Z is 22; ll) each Nu is a base which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 50 (CGC XCX CAA AGC AGC XCX GAG A) wherein Z is 20; mm) each Nu is a base which taken er form the targeting sequence (5’ to 3’) of: SEQ ID NO: 51 (CCX CXC AAA GCA GCX CXG AGA) n Z is 19; nn) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 52 (GGC GGC ACX CAC GGG CXC XCA AAG) wherein Z is 22; oo) each Nu is a base which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 53 (GGC GGC ACX CAC GCX CXC AAA G) wherein Z is 20; pp) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 54 (GGC GGC ACX CAC CXC XCA AAG) wherein Z is 19; qq) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 55 (GCG GGA GGG GCG GCA CXC ACG GGC) wherein Z is 22; rr) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 56 (GCG GGA GGG GCG GCA CXC ACG GC) wherein Z is 21; ss) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 57 (GCG GGA GGG GCG GCA CXC ACG C) wherein Z is 20; and tt) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 58 (GCG GGA GGG GCG GCA CXC ACC) wherein Z is 19, wherein X is selected from uracil (U) or thymine (T); a) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 59 (GGC CAG AAG GAA GGG CGA GAA AAG C) wherein Z is 23; b) each Nu is a nucleobase which taken together form the targeting ce (5’ to 3’) of: SEQ ID NO: 60 (CCA GAA GGA AGG GCG AGA AAA GCX C) wherein Z is 23; c) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 61 (AAG GAA GGG CGA GAA AAG CXC CAG C) wherein Z is 23; d) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 62 (GCG GGA GGG GCG GCA CXC ACG GGG C) wherein Z is 23; e) each Nu is a base which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 63 (XGG GGA GAG GGC CAG AAG GAA GGG C) n Z is 23; f) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 64 (AGA AGG AAG GGC GAG AAA AGC XCC A) wherein Z is 23; g) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 65 (GCX CXC AAA GCA GCX CXG AGA CAX C) n Z is 23; h) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 66 (CXC XCA AAG CAG CXC XGA GAC AXC A) n Z is 23; i) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 67 (XCX CAA AGC AGC XCX GAG ACA XCA A) wherein Z is 23; j) each Nu is a base which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 68 (CXC AAA GCA GCX CXG AGA CAX CAA C) wherein Z is 23; k) each Nu is a nucleobase which taken er form the targeting sequence (5’ to 3’) of: SEQ ID NO: 69 (XCA AAG CAG CXC XGA GAC AXC AAC C) wherein Z is 23; l) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 70 (CAA AGC AGC XCX GAG ACA XCA ACC G) wherein Z is 23; m) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 71 (AAA GCA GCX CXG AGA CAX CAA CCG C) wherein Z is 23; n) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 72 (AAG CAG CXC XGA GAC AXC AAC CGC G) wherein Z is 23; o) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 73 (AGC AGC XCX GAG ACA XCA ACC GCG G) wherein Z is 23; p) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 74 (GCA GCX CXG AGA CAX CAA CCG CGG C) wherein Z is 23; and q) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 75 (CAG CXC XGA GAC AXC AAC CGC GGC X) wherein Z is 23, wherein X is selected from uracil (U) or thymine (T); and III. a) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 76 (GCC AGA AGG AAG GGC GAG AAA AGC X) wherein Z is 23; b) each Nu is a nucleobase which taken together form the targeting ce (5’ to 3’) of: SEQ ID NO: 77 (CAG AAG GAA GGG CGA GAA AAG CXC C) wherein Z is 23; c) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 78 (GAA GGA AGG GCG AGA AAA GCX CCA G) wherein Z is 23; d) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 79 (AGG AAG GGC GAG AAA AGC XCC AGC A) wherein Z is 23; e) each Nu is a nucleobase which taken er form the targeting sequence (5’ to 3’) of: SEQ ID NO: 80 (ACX CAC GGG GCX CXC AAA GCA GCX C) wherein Z is 23; f) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 81 (GGCXCXCAAAGCAGCXCXGAGACAX) wherein Z is 23; g) each Nu is a base which taken er form the ing ce (5’ to 3’) of: SEQ ID NO: 82 (GGC XCX CAA AGC AGC XCX GA) wherein Z is 18; h) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 83 (GAG AGG GCC AGA AGG AAG GG) wherein Z is 18; i) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 84 (XXX GCC AXG XXA CCC AGG CX) wherein Z is 18; j) each Nu is a nucleobase which taken er form the targeting sequence (5’ to 3’) of: SEQ ID NO: 85 (GCG CAC CCX CXG CCC XGG CC) wherein Z is 18; and k) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 86 (GGC CCX GGX CXG CXG GCX CCC XGC X) wherein Z is 23, wherein X is selected from uracil (U) or thymine (T); and wherein Ra is H or acetyl.

In some embodiments, at least one X of SEQ ID NOS:13-86 is T. In some embodiments, at least one X of SEQ ID NOS: 13-86 is U. In some embodiments, each X of SEQ ID NOS: 13- 86 is T. In some embodiments, each X of SEQ ID NOS: 13-86 is U. In various ments, at least one X of the targeting sequence is T. In various embodiments, each X of the targeting sequence is T. In various embodiments, at least one X of the targeting sequence is U. In various embodiments, each X of the targeting sequence is U.

In certain embodiments, the targeting sequence is selected from the group consisting of SEQ ID NOs: 13, 27-29, 34-36, 59, and 82. In some embodiments, at least one X of SEQ ID NOS: 13, 27-29, 34-36, 59, and 82 is T. In some ments, at least one X of SEQ ID NOS: 13, 27-29, 34-36, 59, and 82 is U. In some embodiments, each X of SEQ ID NOS: 13, 27-29, 34-36, 59, and 82 is T. In some embodiments, each X of SEQ ID NOS: 13, 27-29, 34-36, 59, and 82 is U.

In some embodiments of the antisense oligomers of the disclosure including, for example, antisense oligomers of formula (XX), the antisense oligomer can be of formula (XXI): or a ceutically acceptable salt thereof, wherein: a) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 13 (GGC CAG AAG GAA GGC GAG AAA AGC) wherein Z is 22; b) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 14 (GCC AGA AGG AAG GC GAG AAA AGC X) wherein Z is 22; c) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 15 (CCA GAA GGA AGG CGA GAA AAG CXC) wherein Z is 22; d) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 16 (CAG AAG GAA GGC GAG AAA AGC XCC) wherein Z is 22; e) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 17 (AGA AGG AAG GCG AGA AAA GCX CCA) n Z is 22; f) each Nu is a nucleobase which taken er form the targeting sequence (5’ to 3’) of: SEQ ID NO: 18 (GAA GGA AGG CGA GAA AAG CXC CAG) n Z is 22; g) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 19 (AAG GAA GGC GAG AAA AGC XCC AGC) wherein Z is 22; h) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 20 (AGG AAG GCG AGA AAA GCX CCA GCA) wherein Z is 22; i) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 21 (CGG CXC XCA AAG CAG CXC XGA GA) wherein Z is 21; j) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 22 (ACG GCX CXC AAA GCA GCX CXG AG) wherein Z is 21; k) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 23 (CAC GGC XCX CAA AGC AGC XCX GA) wherein Z is 21; l) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 24 (XCA CGG CXC XCA AAG CAG CXC XG) n Z is 21; m) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 25 (CXC ACG GCX CXC AAA GCA GCX CX) wherein Z is 21; n) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 26 (ACX CAC GGC XCX CAA AGC AGC XC) wherein Z is 21; o) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 27 (GCG GCA CXC ACG GCX CXC AAA GC) wherein Z is 21; p) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 28 (GGC GGC ACX CAC GGC XCX CAA AG) wherein Z is 21; q) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 29 (CGG CAC XCA CGG CXC XCA AAG CA) wherein Z is 21; r) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 30 (GCA CXC ACG GCX CXC AAA GCA GC) wherein Z is 21; s) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 31 (GGC ACX CAC GGC XCX CAA AGC AG) wherein Z is 21; t) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 32 (CAC XCA CGG CXC XCA AAG CAG CX) wherein Z is 21; u) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 33 (GCC AGA AGG AAG GCG AGA AAA GC) wherein Z is 21; v) each Nu is a base which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 34 (CCA GAA GGA AGG CGA GAA AAG C) wherein Z is 19; w) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 35 (CAG AAG GAA GGC GAG AAA AGC) wherein Z is 19; x) each Nu is a nucleobase which taken er form the targeting sequence (5’ to 3’) of: SEQ ID NO: 36 (GGC CAG AAG GAA GGC GAG AAA AG) wherein Z is 21; y) each Nu is a base which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 37 (GGC CAG AAG GAA GGC GAG AAA A) wherein Z is 19; z) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 38 (GGC CAG AAG GAA GGC GAG AAA) wherein Z is 19; aa) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 39 (CGG CAC XCA CGGC XCX CAA AGC A) wherein Z is 21; bb) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 40 (GCG GCA CXC ACGG CXC XCA AAG C) n Z is 21; cc) each Nu is a nucleobase which taken together form the targeting ce (5’ to 3’) of: SEQ ID NO: 41 (GGC GGC ACX CAC G GCX CXC AAA G) wherein Z is 21; dd) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 42 (XGG GGA GAG GGC CAG AAG GAA GGC) wherein Z is 22; ee) each Nu is a nucleobase which taken together form the targeting ce (5’ to 3’) of: SEQ ID NO: 43 (XGG GGA GAG GGC CAG AAG GAA GC) wherein Z is 21; ff) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 44 (XGG GGA GAG GGC CAG AAG GAA C) wherein Z is 20; gg) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 45 (GGC CAG AAG GAA GCG AGA AAA GC) wherein Z is 21; hh) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 46 (GGC CAG AAG GAA CGA GAA AAG C) wherein Z is 20; ii) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 47 (AGG AAG CGA GAA AAG CXC CAG CA) wherein Z is 21; jj) each Nu is a nucleobase which taken er form the targeting sequence (5’ to 3’) of: SEQ ID NO: 48 (AGG AAC GAG AAA AGC XCC AGC A) wherein Z is 20; kk) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 49 (CGG GCX CXC AAA GCA GCX CXG AGA) wherein Z is 22; ll) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 50 (CGC XCX CAA AGC AGC XCX GAG A) wherein Z is 20; mm) each Nu is a nucleobase which taken together form the targeting ce (5’ to 3’) of: SEQ ID NO: 51 (CCX CXC AAA GCA GCX CXG AGA) wherein Z is 19; nn) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 52 (GGC GGC ACX CAC GGG CXC XCA AAG) wherein Z is 22; oo) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 53 (GGC GGC ACX CAC GCX CXC AAA G) n Z is 20; pp) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 54 (GGC GGC ACX CAC CXC XCA AAG) wherein Z is 19; qq) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 55 (GCG GGA GGG GCG GCA CXC ACG GGC) wherein Z is 22; rr) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 56 (GCG GGA GGG GCG GCA CXC ACG GC) wherein Z is 21; ss) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 57 (GCG GGA GGG GCG GCA CXC ACG C) wherein Z is 20; and tt) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 58 (GCG GGA GGG GCG GCA CXC ACC) n Z is 19, wherein X is selected from uracil (U) or thymine (T); a) each Nu is a base which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 59 (GGC CAG AAG GAA GGG CGA GAA AAG C) n Z is 23; b) each Nu is a nucleobase which taken er form the targeting sequence (5’ to 3’) of: SEQ ID NO: 60 (CCA GAA GGA AGG GCG AGA AAA GCX C) wherein Z is 23; c) each Nu is a nucleobase which taken er form the targeting sequence (5’ to 3’) of: SEQ ID NO: 61 (AAG GAA GGG CGA GAA AAG CXC CAG C) wherein Z is 23; d) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 62 (GCG GGA GGG GCG GCA CXC ACG GGG C) wherein Z is 23; e) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 63 (XGG GGA GAG GGC CAG AAG GAA GGG C) wherein Z is 23; f) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 64 (AGA AGG AAG GGC GAG AAA AGC XCC A) wherein Z is 23; g) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 65 (GCX CXC AAA GCA GCX CXG AGA CAX C) wherein Z is 23; h) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 66 (CXC XCA AAG CAG CXC XGA GAC AXC A) wherein Z is 23; i) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 67 (XCX CAA AGC AGC XCX GAG ACA XCA A) wherein Z is 23; j) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 68 (CXC AAA GCA GCX CXG AGA CAX CAA C) wherein Z is 23; k) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 69 (XCA AAG CAG CXC XGA GAC AXC AAC C) wherein Z is 23; l) each Nu is a nucleobase which taken together form the targeting ce (5’ to 3’) of: SEQ ID NO: 70 (CAA AGC AGC XCX GAG ACA XCA ACC G) wherein Z is 23; m) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 71 (AAA GCA GCX CXG AGA CAX CAA CCG C) wherein Z is 23; n) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 72 (AAG CAG CXC XGA GAC AXC AAC CGC G) wherein Z is 23; o) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 73 (AGC AGC XCX GAG ACA XCA ACC GCG G) n Z is 23; p) each Nu is a nucleobase which taken together form the targeting ce (5’ to 3’) of: SEQ ID NO: 74 (GCA GCX CXG AGA CAX CAA CCG CGG C) wherein Z is 23; and q) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 75 (CAG CXC XGA GAC AXC AAC CGC GGC X) wherein Z is 23, wherein X is selected from uracil (U) or thymine (T); and III. l) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 76 (GCC AGA AGG AAG GGC GAG AAA AGC X) wherein Z is 23; m) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 77 (CAG AAG GAA GGG CGA GAA AAG CXC C) wherein Z is 23; n) each Nu is a nucleobase which taken together form the targeting ce (5’ to 3’) of: SEQ ID NO: 78 (GAA GGA AGG GCG AGA AAA GCX CCA G) wherein Z is 23; o) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 79 (AGG AAG GGC GAG AAA AGC XCC AGC A) n Z is 23; p) each Nu is a base which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 80 (ACX CAC GGG GCX CXC AAA GCA GCX C) wherein Z is 23; q) each Nu is a nucleobase which taken er form the targeting sequence (5’ to 3’) of: SEQ ID NO: 81 (GGCXCXCAAAGCAGCXCXGAGACAX) wherein Z is 23; r) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 82 (GGC XCX CAA AGC AGC XCX GA) wherein Z is 18; s) each Nu is a nucleobase which taken together form the ing sequence (5’ to 3’) of: SEQ ID NO: 83 (GAG AGG GCC AGA AGG AAG GG) wherein Z is 18; t) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 84 (XXX GCC AXG XXA CCC AGG CX) wherein Z is 18; u) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 85 (GCG CAC CCX CXG CCC XGG CC) n Z is 18; and v) each Nu is a nucleobase which taken together form the targeting sequence (5’ to 3’) of: SEQ ID NO: 86 (GGC CCX GGX CXG CXG GCX CCC XGC X) n Z is 23, n X is ed from uracil (U) or thymine (T); and wherein Ra is H or acetyl.

In some embodiments, at least one X of SEQ ID NOS:13-86 is T. In some embodiments, at least one X of SEQ ID NOS: 13-86 is U. In some embodiments, each X of SEQ ID NOS: 13- 86 is T. In some embodiments, each X of SEQ ID NOS: 13-86 is U. In various embodiments, at least one X of the targeting sequence is T. In various embodiments, each X of the targeting sequence is T. In various embodiments, at least one X of the targeting sequence is U. In various embodiments, each X of the targeting sequence is U.

In certain embodiments, the targeting sequence is selected from the group consisting of SEQ ID NOs: 13, 27-29, 34-36, 59, and 82. In some embodiments, at least one X of SEQ ID NOS: 13, 27-29, 34-36, 59, and 82 is T. In some embodiments, at least one X of SEQ ID NOS: 13, 27-29, 34-36, 59, and 82 is U. In some ments, each X of SEQ ID NOS: 13-86 is T.

In some embodiments, each X of SEQ ID NOS: 13, 27-29, 34-36, 59, and 82 is U.

In some embodiments, the antisense oligomer is a compound of formula (XXII), or a pahramceutically acceptable salt thereof, selected from: BREAK A BREAK B BREAK C (XXII a) BREAK A 106 106 v ] WMEAK A BREAm BREAK C \N/ WIJHO \N/ \ w O M O N wkwolVL N / O o Tkwo EN N ov//IN EN O / / O 0\\VO v] / W N H N W \N/ NIWTO Ym 0 O N \N/ \N/ NI4IOm N w O z 0 //!N / EN 0 N Ny \VL H y \N/ o \ N O NVWNH 7 2 O / leTobLN/ mLébLN EN NIMTOIVL\ N f N H2 N H2 \N/ N|M__r\o O N O / 0 ‘N //IN / N% Wy\NN VL ano N\Nw / NIWIOIVL NNLTOIVLO \N/NATO O / O N \N/7 N o N 0 F N4! / o f / \VL EN / 0 N N H / Ni N H N N \N/ le__.IO|V|\ # N N um; 0 \N/ W \ 2 H VfiN _ M O 2 N o N N / / IN LalE EN o N H 0 2 o 0 FN N vHO / m w N N ojN‘mNobL y\ NN NwfiwolVLo VJ \N/L70 N O N N O H2 o / / \N/ N |V|\ IN N EN w NlnflIOIVL\ EN O 0 vl/ N VHO IVL0 /w o / W \N N H MNlPIO:O N lelo %N\ H z / M O N 0 M2 / / N N IVL LIN W 2 F W2 0 ///N M / \N IVL m N H 0 / 0 N / 0 Nw \N , T V LTRL V N\N# \ hN BREAK B BREAK A (XXII b) 107 107 O; BREAK A BREAK B BREAK C NV O O j /\N BREAK A \N/ Om \N/_ O o H2 o FN \ K/IN VI, N w NITRL / NIW NIW BmAK B mEAK (XxII \W 108 108 BREAK A BREAK B BREAK C BREAK A BREAK B BREAK C (XXII d) 109 109 fl BmAK A BRm B AK C BM B BREA mm e) BRmK A mW?% BREA 1-0% \N/i \N/Ta o w\ N FMNH O NH2 r N H2 o N V] Wy oklo \N N H owlN/LNLYIVL NLTO N H 2 O IVL\N/ N H2 H2 W J / 2 \ O O (wN‘N 0 N \ o NVHO \N/ O / NIN H 2 _NIPIO: O \N/my:O N‘MIO NvHO FN o o N X 0 \ / \N/ NxfiwolVL\N/ N H N \ O N N H2 O ENNHo O / \N/ H 2 w N H2 / / 2 N 0 NIN \N k O N NukIOVL L\N/ NV" O _ NvHO 0 O T0 0 _ 0 T" VrNW" at: 0 N/FN f / O O \N/ NINTO My N‘W‘OIVL O N (LE @\N 2 fl j N O | \N/ NIMIOVL\N/ / 2 0 O w 0 i N1%IO|VL\N/0 we NIMTOIVL\o N IN WMEAK A N\w_,.\0\V|\O N _n_V o Nln_r|o 0 WfiN O EN W VL j \ a H2 NIW %m BRMK C av.|A. .I. Al) 110 110 BREAK A BREAK B BREAK C \N/T3zo \N/ :o N TE N H 4] ) 2 o O N I\Io \,FN / 9 V / N N / N VIN \N/ lelo__ o =o \ N \N/ H2 0 / O ‘N O \ W T N :o o / NIJIIO N a! O \N \ w N __O o N / / N\n_r\o / N H N|4IO BREAK B (XXII g) 111 111 BREAK A BREAK B BREAK C BREAK B BREAK C (xxu h) and and 112 112 wherein X at each occurrence is independently selected from (U) or (T).

In some embodiments, each X is T. In other embodiments, each X is U.

In some ments, the antisense oligomer of formula (XXII) is formula (XXII a) wherein at least one X is U. In some embodiments, the compound of a (XXII) is formula (XXII a) wherein at least one X is T. In some embodiments, the compound of formula (XXII) is formula (XXII a) n each X is U. In some embodiments, the compound of formula (XXII) is a (XXII a) wherein each X is T.

In some embodiments, the antisense er of formula (XXII) is formula (XXII b) wherein at least one X is U. In some embodiments, the compound of formula (XXII) is formula (XXII b) wherein at least one X is T. In some embodiments, the compound of formula (XXII) is formula (XXII b) wherein each X is U. In some embodiments, the compound of formula (XXII) is formula (XXII b) wherein each X is T.

In some embodiments, the antisense oligomer of formula (XXII) is formula (XXII c) wherein at least one X is U. In some embodiments, the compound of formula (XXII) is formula (XXII c) wherein at least one X is T. In some embodiments, the compound of formula (XXII) is formula (XXII c) wherein each X is U. In some embodiments, the compound of formula (XXII) is formula (XXII c) wherein each X is T.

In some embodiments, the antisense oligomer of formula (XXII) is formula (XXII d) wherein at least one X is U. In some embodiments, the compound of formula (XXII) is formula (XXII d) wherein at least one X is T. In some embodiments, the compound of formula (XXII) is formula (XXII d) wherein each X is U. In some embodiments, the compound of formula (XXII) is formula (XXII d) wherein each X is T.

In some embodiments, the antisense oligomer of formula (XXII) is formula (XXII e) wherein at least one X is U. In some embodiments, the compound of formula (XXII) is a (XXII e) wherein at least one X is T. In some embodiments, the nd of formula (XXII) is formula (XXII e) wherein each X is U. In some embodiments, the compound of formula (XXII) is a (XXII e) wherein each X is T.

In some embodiments, the antisense oligomer of formula (XXII) is a (XXII f) wherein at least one X is U. In some embodiments, the compound of formula (XXII) is formula (XXII f) wherein at least one X is T. In some embodiments, the compound of formula (XXII) is formula (XXII f) wherein each X is U. In some embodiments, the compound of a (XXII) is formula (XXII f) wherein each X is T.

In some embodiments, the antisense oligomer of formula (XXII) is formula (XXII g) wherein at least one X is U. In some embodiments, the compound of formula (XXII) is formula (XXII g) wherein at least one X is T. In some embodiments, the compound of formula (XXII) is formula (XXII g) wherein each X is U. In some embodiments, the nd of formula (XXII) is formula (XXII g) wherein each X is T.

In some embodiments, the antisense oligomer of formula (XXII) is formula (XXII h) wherein at least one X is U. In some embodiments, the compound of formula (XXII) is formula (XXII h) wherein at least one X is T. In some embodiments, the compound of formula (XXII) is a (XXII h) wherein each X is U. In some embodiments, the compound of formula (XXII) is formula (XXII h) wherein each X is T.

In some embodiments, the antisense oligomer of formula (XXII) is a (XXII i) wherein at least one X is U. In some embodiments, the nd of formula (XXII) is a (XXII i) wherein at least one X is T. In some embodiments, the compound of formula (XXII) is formula (XXII i) wherein each X is U. In some ments, the compound of formula (XXII) is formula (XXII i) wherein each X is T.

In some embodiments of the antisense oligomers of the disclosure including, for example, the antisense oligomers of formula (XXII), the antisense oligomers is a compound of formula (XXIII), or a pahramceutically acceptable salt f, selected from: BREAK A BREAK B BREAK C N1o \N/ _ __ o :O / N WIPIO \N/ o FN O Won N o 2 O KINN/ / O ,rN )KI v N T N Vi U\ N \ NI N H2 \ O O M VIN ,NE, O , O o / \N/ I / o N /|\ \ O O FM N / H N\ NIKIOIVL N NIB—.IO __0 NIWIO|VL\ NI \ / N_ N O H2 N \N/ NATO NI$IO NNINI?O alN O / N H / IVL\N/ W2 / 2 O / W % IVL0 N IN N23 I o W2 __N \ \ N N w O o / / / Y O L5 N o FN / VLO 4'N O W / N N H y\ N N W m \ 1H / NATO W NW 2 2 / N NIPIO N EN O NEO FM W2 / / N N\Nw 4\\ N N //I M2 O I / \ 0 EN NW Nlm,_.IOIV|\\O VJ W\NHN lelo NITVL N H O N O N N IVL 2 O é’N / 0 /lN/ j \N v / \N w NN WJW wlw BREAK A BREAK B BREAK C (XXIII b) 116 116 BREAK A BREA B BMAK C \ N \ w TN mWlklo o mlho / / PIO N / N N m //IN O O clN EN 0 / / \J N "l/ WwN H N \ w\N H \ mleloo \N/ NIMI M / O N H2 / / NIPIOw N NE N N VL\N/ um.

O 0 0 NWW IN f \N Nvflo WWW\N N H 2 \ NIkIO NIn_7,rIOV|\\O \N/ 0 IN M O / N N N EN o o o O f EN / / / N w w N N#N N N INTOVLo m y\N 2 \N/ H2 / NIPIO m N H O 2 \N/ O ‘N _ W / NLTOIVL N N NV" H2 N / 0 FN o O F N T /w N H N2 -___-pL0 NTVHO N J\ W2 W O w 2 0 4!N \N/ N470 \N/ N / 0 0 I \N N a] M2 o f / Ntau V N, N 0" I N / N1$IOVL\ NIWIOIVL m O NV N O \ N O O FNN/ / {.10 / / N T 2 N H FN M 2 F m Nw\ O 0v / 0 NIW k W N w\N/V W lm 2 kL j w 3?be mmK A N .IO N O (» w 0 / IVLovFNN/w m WILLor N/V/ \N BREAK B BREAK C (XXIII c) 117 117 BREAK A BREAK B BREAK C / NIN 2 0"NFML WELLO 0vFN BREAK B BREAK C (XXIII d) 118 118 I ] BREA /\ A mEAK B mEAm/ \N/ VJIO N __ N N TWIO o \N/ w N f O 0 T770 O / o / 0 //IN \JI\|O N H NR 7N NWL N WM \N/V OVIN \N/ NIWIOVL\ \ I o H / I \N/ N N F W2 o N7 / N FN o H2 /|\ 0 o / \N / / \ Nlnkvlo Ny L FNjW \N/ W _ N w O H2 N o //IN o / N m2 \N/ NIm7_.IO N o / / N H ENWv 2 o N IN 0 N NV\ LakL \N \N/ N|n7__r|o W2 O \N/ITO N O N 0 EN /7IN / 0 2 N y\ IVL N H N % N \ m V\ N lelo O 2 7 \ NIn7_rIO N H 2 / W : w O O 2 / 2 / N NIPIO N 7 o N H2 N IN VLO rN IV|\\N/O //IN VH0 / v // \ w N NIkIO N V\ / Nw \N/ _ O \ Nln_77r|OIVI\\ m N O 2 _7O / 2 / N, NID7.|O N IVLo N IN /IN Vl/ 0 FN VH0 / VI/ / N N \ NI N_ \N/ NIPIO __ / BREAK A BREAK B (XXIII e) BRmK A BMAm BREAMz \N/ Wife \ T4o o M :I / N 0 N N La //IN W Wy 2 0 //IN )Klo o o" / EN \N N H H:\N H / N VIN \ MIMIOVL N/ N H2 O \N/ O / N N N \l/ / H2 / H2 0 IN 0 NIW_7IIOV|\\ vNV.H NIMTOIVL0 IN \N/ O NvHO I711 / NIN H2 \N/7NIkIOVLO _ _ 0 NV" o NIklo O o O \N/ / / o NV" N H O N N_LILLN/ O O NITLL /7INWW \N/ \ o 7NIkIOIVLO W N H2 \N/7 0 / 2 / / 0 N IN IN m L\o Nlm7_.IO&I\\ NW o VH0 0 /7INV 0 \N/ NIM7FIOVL\O N /m N / NLTOVI\\NO / FN / / 0 O NI$_.IO WWW N N H N O z NN7 vHo N NIJIO7_O 1.. 0 BREAK B BREAK C (XXIII f) 119 119 BREAK A BREAK B BREAK C BREAK B BREAK C (XXIII g) 120 120 BREAK A BREAK B BREAK C BREAK B BREAK A (XXIII h) and and 121 121 In some embodiments, the antisense oligomer of formula (XXIII) is of formula (XXIII a). In some embodiments, the antisense oligomer of formula (XXIII) is of formula (XXIII b). In some embodiments, the antisense oligomer of formula (XXIII) is of a (XXIII c). In some embodiments, the antisense oligomer of formula (XXIII) is of formula (XXIII d). In some embodiments, the antisense oligomer of formula (XX) is of formula (XXIII e). In some embodiments, the antisense oligomer of formula (XXIII) is of formula (XXIII f). In some embodiments, the antisense oligomer of formula (XXIII) is of formula (XXIII g). In some embodiments, the antisense oligomer of formula (XXIII) is of formula (XXIII h). In some embodiments, the antisense er of formula (XXIII) is of formula (XXIII i).

In another aspect, the sure features an antisense er compound of any one of as (XXII a) to (XXII i), or a pharmaceutically acceptable salt thereof, wherein X at each occurrence is independently selected from (U) or (T). In some embodiments, each X is T.

In another aspect, the disclosure es an antisense oligomer compound of any one of as (XXIII a) to (XXIII i), or a ceutically acceptable salt thereof.

D. The Preparation of PMO-X with Basic Nitrogen Internucleoside s lino subunits, the ed ubunit linkages, and oligomers comprising the same can be prepared as described, for example, in U.S. Patent Nos. 5,185,444, and 7,943,762, which are incorporated by reference in their entireties. The lino subunits can be ed according to the following general Reaction Scheme I.

Reaction Scheme 1. Preparation of Morpholino Subunit B O O 1. NaIO4, MeoH (aq) HO 2. (NH4)2B4O7 3. Borane-triethylamine N+ 4. Methanolic acid H HO OH or HCl) H H 1 2 O B B O X P Cl O X P O HO Cl 4 N N PG PG Referring to Reaction Scheme 1, n B represents a base pairing moiety and PG represents a protecting group, the morpholino subunits may be prepared from the corresponding cleoside (1) as shown. The morpholino subunit (2) may be optionally protected by reaction with a suitable protecting group precursor, for example trityl chloride. The 3’ protecting group is generally removed during solid-state oligomer synthesis as described in more detail below. The base pairing moiety may be suitably protected for sold phase er synthesis.

Suitable protecting groups include benzoyl for adenine and ne, phenylacetyl for guanine, and pivaloyloxymethyl for hypoxanthine (I). The pivaloyloxymethyl group can be introduced onto the N1 position of the hypoxanthine heterocyclic base. Although an unprotected hypoxanthine subunit, may be employed, yields in activation reactions are far superior when the base is protected. Other suitable ting groups include those disclosed in co-pending U.S.

Application No. 12/271,040, which is hereby incorporated by reference in its entirety.

Reaction of 3 with the activated phosphorous compound 4, results in morpholino subunints having the desired linkage moiety 5. Compounds of structure 4 can be prepared using any number of methods known to those of skill in the art. For example, such compounds may be prepared by reaction of the corresponding amine and phosphorous oxychloride. In this regard, the amine starting material can be prepared using any method known in the art, for example those methods described in the Examples and in U.S. Patent No. 7,943,762.

Compounds of ure 5 can be used in solid-phase automated oligomer sis for preparation of oligomers sing the intersubunit linkages. Such methods are well known in the art. Briefly, a compound of structure 5 may be ed at the 5’ end to contain a linker to a solid support. For e, compound 5 may be linked to a solid support by a linker comprising L11 and L15.

The preparation of modified morpholino subunits and morpholino oligomers are described in more detail in the Examples. The morpholino oligomers containing any number of ed linkages may be prepared using s described herein, methods known in the art and/or described by reference herein. Also described in the examples are global modifications of morpholino oligomers prepared as previously described (see e.g., PCT publication WO2008036127).

The term "protecting group" refers to al es that block some or all reactive moieties of a compound and prevent such moieties from participating in chemical reactions until the protective group is removed, for e, those moieties listed and described in T.W.

, P.G.M. Wuts, Protective Groups in Organic Synthesis, 3rd ed. John Wiley & Sons (1999). It may be advantageous, where different protecting groups are employed, that each (different) protective group be removable by a different means. Protective groups that are cleaved under totally ate reaction conditions allow differential removal of such protecting groups. For example, protective groups can be removed by acid, base, and hydrogenolysis.

Groups such as trityl, dimethoxytrityl, acetal and tert-butyldimethylsilyl are acid labile and may be used to protect y and hydroxy reactive moieties in the presence of amino groups protected with Cbz groups, which are removable by enolysis, and Fmoc groups, which are base labile. Carboxylic acid moieties may be blocked with base labile groups such as, without limitation, methyl, or ethyl, and hydroxy reactive moieties may be blocked with base labile groups such as acetyl in the presence of amines blocked with acid labile groups such as tert-butyl carbamate or with carbamates that are both acid and base stable but hydrolytically removable.

Carboxylic acid and hydroxyl reactive moieties may also be blocked with hydrolytically removable protective groups such as the benzyl group, while amine groups may be blocked with base labile groups such as Fmoc. A particulary useful amine protecting group for the synthesis of compounds of Formula (I) is the trifluoroacetamide. Carboxylic acid ve moieties may be blocked with oxidatively-removable protective groups such as 2,4-dimethoxybenzyl, while co- existing amino groups may be blocked with fluoride labile silyl carbamates.

Allyl blocking groups are useful in the presence of acid- and base- protecting groups since the former are stable and can be subsequently removed by metal or pi-acid catalysts. For example, an allyl-blocked carboxylic acid can be deprotected with a ium(0)-catalyzed reaction in the presence of acid labile t-butyl carbamate or base-labile acetate amine protecting groups. Yet another form of protecting group is a resin to which a compound or intermediate may be attached. As long as the residue is attached to the resin, that functional group is blocked and cannot react. Once released from the resin, the onal group is available to react.

Typical blocking/protecting groups are known in the art and include, but are not limited to the following moieties: H3C CH3 H3C Si Allyl Bn PMB TBDMS Me H3C CH3 O O H3C O O Si H3C O H3C O CH3 O Alloc Cbz TEOC BOC H3C Ph H3C H3C Ph CH3 Ph O t-butyl trityl acetyl FMOC Unless otherwise noted, all chemicals were obtained from Sigma-Aldrich-Fluka. Benzoyl adenosine, benzoyl cytidine, and phenylacetyl guanosine were obtained from Carbosynth Limited, UK. sis of PMO, PMO+, PPMO, and PMO-X containing further e modifications as described herein was done using methods known in the art and described in pending U.S. applications Nos. 12/271,036 and 12/271,040 and PCT publication number WO/2009/064471, which are hereby incorporated by reference in their entirety.

PMO with a 3’ trityl modification are synthesized ially as described in PCT ation number WO/2009/064471 with the exception that the detritylation step is omitted.

IV. Formulations The compounds of the disclosure may also be admixed, encapsulated, conjugated or otherwise associated with other molecules, molecule structures or mixtures of compounds, as for example, liposomes, or-targeted molecules, oral, , topical or other formulations, for assisting in , distribution and/or absorption. entative United States patents that teach the preparation of such , distribution and/or absorption-assisting formulations include, but are not limited to, U.S. Pat. Nos. 5,108,921; 5,354,844; 5,416,016; 5,459,127; ,521,291; 5,543,158; 5,547,932; 5,583,020; 5,591,721; 4,426,330; 4,534,899; 5,013,556; ,108,921; 5,213,804; 5,227,170; 5,264,221; 633; 5,395,619; 5,416,016; 978; 5,462,854; 5,469,854; 5,512,295; 5,527,528; 5,534,259; 5,543,152; 5,556,948; 5,580,575; and ,595,756, each of which is herein incorporated by reference.

The antisense compounds of the disclosure encompass any pharmaceutically acceptable salts, esters, or salts of such esters, or any other compound which, upon administration to an animal, including a human, is capable of providing tly or indirectly) the biologically active metabolite or residue thereof. Accordingly, for example, the disclosure is also drawn to prodrugs and pharmaceutically acceptable salts of the compounds of the sure, pharmaceutically acceptable salts of such prodrugs, and other bioequivalents.

The term "prodrug" indicates a therapeutic agent that is prepared in an inactive form that is ted to an active form (i.e., drug) within the body or cells thereof by the action of endogenous enzymes or other chemicals and/or conditions. In particular, prodrug versions of the oligomers of the disclosure are prepared as SATE [(S-acetylthioethyl) phosphate] derivatives according to the methods disclosed in WO 93/24510 to Gosselin et al., published Dec. 9, 1993 or in WO 94/26764 and U.S. Pat. No. 5,770,713 to Imbach et al.

The term "pharmaceutically acceptable salts" refers to physiologically and pharmaceutically acceptable salts of the nds of the disclosure: i.e., salts that retain the desired biological activity of the parent compound and do not impart undesired toxicological s thereto. For oligomers, examples of pharmaceutically acceptable salts and their uses are further described in U.S. Pat. No. 6,287,860, which is incorporated herein in its entirety.

The t disclosure also includes pharmaceutical compositions and formulations which include the antisense compounds of the disclosure. The pharmaceutical compositions of the present disclosure may be administered in a number of ways ing upon whether local or systemic treatment is desired and upon the area to be treated. Administration may be topical (including ophthalmic and to mucous membranes including vaginal and rectal delivery), pulmonary, e.g., by inhalation or insufflation of powders or aerosols, including by zer; intratracheal, intranasal, epidermal and transdermal), oral or parenteral. eral administration includes intravenous, intraarterial, subcutaneous, intraperitoneal or intramuscular ion or infusion; or intracranial, e.g., hecal or intraventricular, administration.

Oligomers with at least one 2′-O-methoxyethyl modification are believed to be particularly useful for oral administration. Pharmaceutical itions and ations for topical administration may include ermal s, ointments, lotions, creams, gels, drops, suppositories, sprays, liquids and powders. Conventional pharmaceutical carriers, aqueous, powder or oily bases, thickeners and the like may be necessary or desirable. Coated condoms, gloves and the like may also be useful.

The pharmaceutical formulations of the t disclosure, which may conveniently be presented in unit dosage form, may be prepared according to tional techniques well known in the pharmaceutical industry. Such techniques e the step of ng into association the active ingredients with the pharmaceutical carrier(s) or excipient(s). In general, the formulations are prepared by uniformly and intimately bringing into association the active ients with liquid carriers or finely divided solid rs or both, and then, if necessary, shaping the t.

The compositions of the present disclosure may be formulated into any of many possible dosage forms such as, but not limited to, tablets, capsules, gel capsules, liquid syrups, soft gels, suppositories, and enemas. The compositions of the present disclosure may also be formulated as suspensions in aqueous, ueous or mixed media. Aqueous suspensions may r contain substances which increase the viscosity of the suspension including, for example, sodium carboxymethylcellulose, ol and/or dextran. The suspension may also contain stabilizers.

Pharmaceutical compositions of the present disclosure include, but are not limited to, solutions, emulsions, foams and liposome-containing formulations. The pharmaceutical compositions and formulations of the present disclosure may comprise one or more penetration enhancers, carriers, excipients or other active or inactive ingredients.

Emulsions are typically heterogeneous s of one liquid dispersed in another in the form of droplets usually exceeding 0.1 μm in diameter. Emulsions may contain additional components in addition to the sed phases, and the active drug which may be present as a solution in either the s phase, oily phase or itself as a separate phase. Microemulsions are included as an embodiment of the present disclosure. Emulsions and their uses are well known in the art and are further described in U.S. Pat. No. 6,287,860, which is incorporated herein in its entirety.

Formulations of the present disclosure include liposomal formulations. As used in the present sure, the term "liposome" means a vesicle composed of hilic lipids arranged in a spherical bilayer or bilayers. Liposomes are unilamellar or multilamellar vesicles which have a membrane formed from a lipophilic material and an s or that contains the composition to be delivered. Cationic liposomes are positively charged liposomes which are believed to interact with negatively charged DNA molecules to form a stable complex.

Liposomes that are pH-sensitive or negatively-charged are believed to entrap DNA rather than x with it. Both cationic and ionic liposomes have been used to deliver DNA to cells. mes also include "sterically stabilized" liposomes, a term which, as used herein, refers to liposomes comprising one or more specialized lipids that, when incorporated into liposomes, result in enhanced circulation lifetimes relative to liposomes lacking such specialized lipids. es of sterically stabilized liposomes are those in which part of the vesicle-forming lipid n of the liposome comprises one or more glycolipids or is derivatized with one or more hilic polymers, such as a polyethylene glycol (PEG) moiety. Liposomes and their uses are further described in U.S. Pat. No. 6,287,860, which is incorporated herein in its entirety.

The ceutical formulations and compositions of the present disclosure may also include surfactants. The use of surfactants in drug ts, formulations and in emulsions is well known in the art. Surfactants and their uses are further described in U.S. Pat. No. 6,287,860, which is incorporated herein in its entirety.

In some embodiments, the present disclosure employs various penetration enhancers to effect the efficient delivery of nucleic acids, particularly oligomers. In addition to aiding the diffusion of non-lipophilic drugs across cell membranes, penetration enhancers also enhance the permeability of lipophilic drugs. Penetration enhancers may be classified as belonging to one of five broad categories, i.e., surfactants, fatty acids, bile salts, ing agents, and non-chelating non-surfactants. Penetration enhancers and their uses are further described in U.S. Pat. No. 6,287,860, which is incorporated herein in its entirety.

One of skill in the art will recognize that ations are routinely designed according to their intended use, i.e. route of administration. ations for topical administration include those in which the oligomers of the disclosure are in admixture with a topical delivery agent such as , liposomes, fatty acids, fatty acid , steroids, chelating agents and surfactants. Lipids and liposomes include neutral (e.g. dioleoylphosphatidyl DOPE ethanolamine, dimyristoylphosphatidyl choline DMPC, distearolyphosphatidyl choline) negative (e.g. dimyristoylphosphatidyl glycerol DMPG) and cationic (e.g. dioleoyltetramethylaminopropyl DOTAP and dioleoylphosphatidyl ethanolamine DOTMA).

For topical or other administration, oligomers of the disclosure may be ulated within liposomes or may form complexes thereto, in particular to cationic liposomes.

Alternatively, oligomers may be complexed to lipids, in particular to cationic lipids. Fatty acids and esters, ceutically acceptable salts thereof, and their uses are further described in U.S.

Pat. No. 6,287,860, which is incorporated herein in its entirety. l formulations are described in detail in U.S. patent application Ser. No. 09/315,298 filed on May 20, 1999, which is incorporated herein by reference in its entirety.

Compositions and formulations for oral administration include powders or granules, microparticulates, rticulates, suspensions or solutions in water or non-aqueous media, es, gel capsules, s, tablets or minitablets. Thickeners, flavoring agents, diluents, emulsifiers, dispersing aids or binders may be desirable. Oral formulations are those in which oligomers of the disclosure are administered in conjunction with one or more penetration enhancers, surfactants and ors. Surfactants include fatty acids and/or esters or salts thereof, bile acids and/or salts thereof. Bile acids/salts and fatty acids and their uses are further described in U.S. Pat. No. 6,287,860, which is incorporated herein in its entirety. In some embodiments, the present disclosure provides combinations of penetration enhancers, for example, fatty acids/salts in combination with bile acids/salts. An exemplary combination is the sodium salt of lauric acid, capric acid and UDCA. r ation enhancers include polyoxyethylene lauryl ether, polyoxyethylenecetyl ether. Oligomers of the disclosure may be delivered orally, in granular form ing sprayed dried particles, or complexed to form micro or nanoparticles. er complexing agents and their uses are further described in U.S. Pat. No. 6,287,860, which is incorporated herein in its entirety. Oral formulations for oligomers and their ation are described in detail in U.S. application Ser. Nos. 09/108,673 (filed Jul. 1, 1998), 09/315,298 (filed May 20, 1999) and 10/071,822, filed Feb. 8, 2002, each of which is incorporated herein by reference in their entirety.

Compositions and formulations for parenteral, intrathecal or entricular administration may include sterile aqueous solutions which may also contain buffers, diluents and other le additives such as, but not limited to, penetration enhancers, carrier compounds and other pharmaceutically acceptable carriers or ents.

Certain embodiments of the disclosure provide pharmaceutical compositions containing one or more oligomeric compounds and one or more other chemotherapeutic agents which function by a non-antisense mechanism. Examples of such herapeutic agents include but are not limited to cancer chemotherapeutic drugs such as daunorubicin, daunomycin, dactinomycin, doxorubicin, epirubicin, idarubicin, icin, bleomycin, mafosfamide, ifosfamide, cytosine oside, bis-chloroethylnitrosurea, busulfan, mitomycin C, actinomycin D, mithramycin, prednisone, hydroxyprogesterone, testosterone, tamoxifen, dacarbazine, procarbazine, hexamethylmelamine, pentamethylmelamine, mitoxantrone, amsacrine, chlorambucil, methylcyclohexylnitrosurea, nitrogen mustards, melphalan, cyclophosphamide, 6- mercaptopurine, 6-thioguanine, bine, 5-azacytidine, hydroxyurea, deoxyco-formycin, 4- yperoxycyclophosphoramide, 5-fluorouracil (5-FU), 5-fluorodeoxyuridine (5-FUdR), methotrexate (MTX), colchicine, taxol, vincristine, vinblastine, etoposide (VP-16), rexate, irinotecan, topotecan, gemcitabine, teniposide, cisplatin and diethylstilbestrol (DES). When used with the compounds of the disclosure, such herapeutic agents may be used individually (e.g., 5-FU and oligomer), sequentially (e.g., 5-FU and oligomer for a period of time followed by MTX and oligomer), or in ation with one or more other such chemotherapeutic agents (e.g., 5-FU, MTX and oligomer, or 5-FU, radiotherapy and oligomer). Anti-inflammatory drugs, including but not limited to nonsteroidal anti-inflammatory drugs and corticosteroids, and antiviral drugs, including but not limited to rin, vidarabine, acyclovir and lovir, may also be combined in compositions of the disclosure. Combinations of antisense compounds and other tisense drugs are also within the scope of this disclosure. Two or more combined compounds may be used together or sequentially.

In another related embodiment, itions of the disclosure may contain one or more antisense compounds, particularly oligomers, targeted to a first nucleic acid and one or more additional antisense compounds targeted to a second c acid target. atively, compositions of the disclosure may contain two or more antisense compounds targeted to different regions of the same nucleic acid target. Numerous examples of antisense compounds are known in the art. Two or more combined compounds may be used together or sequentially.

V. Methods of Use Certain embodiments relate to methods of increasing expression of exon 2-containing GAA mRNA and/or protein using the nse oligomers of the present disclosure for therapeutic es (e.g., treating subjects with GSD-II). Accordingly, in some embodiments, the present disclosure provides methods of treating an individual afflicted with or at risk for developing GSD-II, comprising administering an effective amount of an antisense oligomer of the disclosure to the t. In some embodiments, the antisense oligomer comprising a nucleotide sequence of sufficient length and complementarity to specifically hybridize to a region within the pre-mRNA of the acid alpha-glucosidase (GAA) gene, wherein binding of the antisense oligomer to the region increases the level of exon 2-containing GAA mRNA in a cell and/or tissue of the subject. Exemplary antisense targeting sequences are shown in Tables 2A- 2C .

Also included are antisense ers for use in the preparation of a medicament for the treatment of glycogen storage disease type II (GSD-II; Pompe disease), comprising a nucleotide sequence of sufficient length and complementarity to specifically hybridize to a region within the pre-mRNA of the acid alpha-glucosidase (GAA) gene, n g of the antisense oligomer to the region increases the level of exon 2-containing GAA mRNA.

In some embodiments of the method of ng GSD-II or the medicament for the treatment of GSD-II, the antisense oligomer compound ses: a non-natural al backbone selected from a phosphoramidate or phosphorodiamidate morpholino oligomer (PMO), a peptide nucleic acid (PNA), a locked nucleic acid (LNA), a phosphorothioate oligomer, a tricyclo-DNA oligomer, a lophosphorothioate oligomer, a 2’O-Me-modified oligomer, or any combination of the foregoing; a targeting sequence complementary to a region within intron 1 (SEQ ID. NO: 1), intron 2 (SEQ ID. NO: 60), or exon 2 (SEQ ID. NO: 61) of a pre-mRNA of the human acid alpha-glucosidase (GAA) gene.

As noted above, "GSD-II" refers to glycogen storage disease type II (GSD-II or Pompe disease), a human autosomal recessive disease that is often characterized by under expression of GAA protein in ed individuals. Included are subjects having infantile GSD-II and those having late onset forms of the disease.

In certain ments, a subject has reduced expression and/or activity of GAA protein in one or more tissues (for example, relative to a y subject or an earlier point in time), including heart, skeletal muscle, liver, and nervous system tissues. In some embodiments, the subject has increased accumulation of glycogen in one or more tissues (for example, relative to a healthy subject or an earlier point in time), including heart, skeletal muscle, liver, and nervous system tissues. In specific embodiments, the subject has at least one IVS1-13T>G mutation (also referred to as 13T>G), possibly in combination with other mutation(s) that leads to reduced expression of functional GAA protein. A y of molecular genetic testing used in GSD-II is shown in Table 3 below.

Table 3 Mutation Gene Detection Test Test Method Mutations Detected Symbol Frequency by Availability Test Method GAA Sequence is p.Arg854* ~50%-60% Clinical p.Asp645Glu ~40%-80% IVS1-13T>G ~50%-85% Other ce ts 83%-93% in the gene Sequence analysis of Sequence variants in the 83%-93% select exons select exons Targeted mutation Sequence variants in 100% of for analysis targeted sites variants among the targeted mutations Deletion/duplication Exonic and whole-gene 5%-13% analysis deletions/duplications Certain embodiments relate to methods of sing expression of exon 2-containing GAA mRNA or protein in a cell, tissue, and/or subject, as described herein. In some instances, exon-2 ning GAA mRNA or protein is increased by about or at least about 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or 100% relative to a control, for example, a control cell/subject, a l composition without the nse oligomer, the absence of treatment, and/or an earlier time-point. Also included are methods of maintaining the expression of containing GAA mRNA or protein relative to the levels of a healthy control.

Some embodiments relate to methods of increasing expression of functional/active GAA n a cell, tissue, and/or subject, as described herein. In certain instances, the level of functional/active GAA protein is increased by about or at least about 5%, 6%, 7%, 8%, 9%, %, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or 100% relative to a control, for example, a control cell/subject, a control composition without the antisense oligomer, the absence of ent, and/or an earlier time-point. Also included are methods of maintaining the expression of functional/active GAA protein ve to the levels of a healthy control.

Particular embodiments relate to methods of reducing the accumulation of glycogen in one or more cells, tissues, and/or subjects, as described herein. In certain instances, the accumulation of en is reduced by about or at least about 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or 100% ve to a control, for example, a control cell/subject, a control composition without the antisense oligomer, the absence of ent, and/or an earlier time-point. Also included are methods of maintaining normal or otherwise healthy glycogen levels in a cell, tissue, and/or subject (e.g., omatic levels or levels associated with reduced symptoms of GSD-II).

Also included are methods of reducing one or more symptoms of GSD-II in a subject in need f. Particular examples include symptoms of infantile GSD-II such as cardiomegaly, hypotonia, cardiomyopathy, left ventricular outflow obstruction, respiratory distress, motor delay/muscle weakness, and feeding difficulties/failure to . Additional examples e ms of late onset GSD-II such as muscle weakness (e.g., skeletal muscle weakness including ssive muscle weakness), impaired cough, recurrent chest infections, nia, delayed motor milestones, difficulty swallowing or chewing, and reduced vital capacity or respiratory insufficiency.

The nse oligomers of the disclosure can be administered to subjects to treat ylactically or therapeutically) GSD-II. In conjunction with such treatment, pharmacogenomics (i.e., the study of the relationship between an individual’s genotype and that individual’s response to a foreign compound or drug) may be considered. Differences in metabolism of therapeutics can lead to severe toxicity or therapeutic failure by altering the relation between dose and blood concentration of the pharmacologically active drug.

Thus, a physician or clinician may er applying knowledge obtained in relevant pharmacogenomics s in determining whether to administer a therapeutic agent as well as tailoring the dosage and/or therapeutic regimen of treatment with a therapeutic agent.

Effective delivery of the antisense oligomer to the target nucleic acid is one aspect of treatment. Routes of antisense oligomer delivery include, but are not limited to, s systemic routes, including oral and parenteral routes, e.g., intravenous, subcutaneous, intraperitoneal, and intramuscular, as well as inhalation, transdermal and topical delivery. The appropriate route may be determined by one of skill in the art, as appropriate to the condition of the subject under treatment. Vascular or extravascular circulation, the blood or lymph system, and the cerebrospinal fluid are some miting sites where the RNA may be introduced. Direct CNS ry may be employed, for instance, intracerebral ventribular or intrathecal administration may be used as routes of administration.

In particular embodiments, the antisense oligomer(s) are administered to the subject by intramuscular injection (IM), i.e., they are administered or delivered intramuscularly. Nonlimiting examples of intramuscular injection sites include the deltoid muscle of the arm, the vastus lateralis muscle of the leg, and the ventrogluteal s of the hips, and dorsogluteal muscles of the ks. In specific embodiments, a PMO, PMO-X, or PPMO is administered by IM.

In certain embodiments, the subject in need thereof as glycogen accumulation in central nervous system tissues. es include instances where central nervous system pathology contributes to respiratory deficits in GSD-II (see, e.g., seau et al., PNAS USA. 106:9419- 24, 2009). Accordingly, the antisense oligomers bed herein can be delivered to the nervous system of a t by any art-recognized method, e.g., where the subject has GSD-II with involvement of the CNS. For example, eral blood injection of the antisense oligomers of the sure can be used to deliver said reagents to peripheral neurons via diffusive and/or active means. Alternatively, the antisense oligomers can be modified to promote crossing of the blood-brain-barrier (BBB) to achieve delivery of said reagents to neuronal cells of the central nervous system (CNS). Specific recent ements in antisense oligomer technology and delivery strategies have broadened the scope of antisense oligomer usage for neuronal disorders (see, e.g., Forte, A., et al. 2005. Curr. Drug Targets 9; Jaeger, L. B., and W. A. Banks. 2005. Methods Mol. Med. 106:237-251; Vinogradov, S. V., et al. 2004. Bioconjug. Chem. 5:50- 60; the foregoing are incorporated herein in their entirety by reference). For example, the antisense oligomers of the disclosure can be generated as peptide nucleic acid (PNA) compounds. PNA reagents have each been identified to cross the BBB (Jaeger, L. B., and W. A.

Banks. 2005. Methods Mol. Med. 7-251). Treatment of a t with, e.g., a vasoactive agent, has also been described to promote transport across the BBB (Id). Tethering of the antisense oligomers of the disclosure to agents that are actively transported across the BBB may also be used as a delivery mechanism. Administration of antisense agents together with contrast agents such as iohexol (e.g., separately, concurrently, in the same formulation) can also facilitate delivery across the BBB, as described in PCT Publication No. WO/2013/086207, incorporated by reference in its entirety.

In certain embodiments, the antisense oligomers of the disclosure can be red by transdermal s (e.g., via incorporation of the antisense oligomers into, e.g., emulsions, with such antisense ers optionally packaged into liposomes). Such transdermal and emulsion/liposome-mediated s of delivery are described for ry of antisense oligomers in the art, e.g., in U.S. Pat. No. 6,965,025, the contents of which are incorporated in their entirety by reference herein.

The antisense oligomers described herein may also be delivered via an implantable device. Design of such a device is an art-recognized process, with, e.g., synthetic implant design described in, e.g., U.S. Pat. No. 6,969,400, the contents of which are incorporated in their entirety by reference herein.

Antisense oligomers can be introduced into cells using art-recognized techniques (e.g., ection, oporation, fusion, liposomes, colloidal polymeric particles and viral and non- viral vectors as well as other means known in the art). The method of delivery selected will depend at least on the oligomer chemistry, the cells to be treated and the location of the cells and will be apparent to the skilled artisan. For instance, localization can be achieved by liposomes with specific markers on the surface to direct the me, direct injection into tissue containing target cells, specific receptor-mediated uptake, or the like.

As known in the art, antisense oligomers may be delivered using, e.g., methods involving liposome-mediated uptake, lipid conjugates, polylysine-mediated uptake, nanoparticle-mediated uptake, and receptor-mediated endocytosis, as well as additional non-endocytic modes of delivery, such as microinjection, permeabilization (e.g., streptolysin-O permeabilization, anionic peptide bilization), electroporation, and various non-invasive non-endocytic methods of delivery that are known in the art (refer to Dokka and Rojanasakul, Advanced Drug Delivery Reviews 44, 35-49, incorporated by reference in its entirety).

The antisense oligomers may be administered in any ient e or carrier which is physiologically and/or pharmaceutically acceptable. Such a composition may e any of a variety of rd pharmaceutically able carriers employed by those of ordinary skill in the art. Examples include, but are not limited to, saline, phosphate buffered saline (PBS), water, aqueous ethanol, emulsions, such as oil/water emulsions or triglyceride emulsions, tablets and capsules. The choice of le physiologically acceptable carrier will vary dependent upon the chosen mode of administration. aceutically acceptable r" is intended to include any and all solvents, dispersion media, coatings, antibacterial and antifungal agents, isotonic and absorption delaying agents, and the like, compatible with pharmaceutical administration. The use of such media and agents for pharmaceutically active substances is well known in the art.

Except insofar as any conventional media or agent is incompatible with the active compound, use thereof in the compositions is plated. Supplementary active compounds can also be incorporated into the compositions.

The compounds (e.g., antisense oligomers) of the t disclosure may generally be utilized as the free acid or free base. Alternatively, the compounds of this disclosure may be used in the form of acid or base addition salts. Acid addition salts of the free amino compounds of the present disclosure may be prepared by s well known in the art, and may be formed from organic and inorganic acids. Suitable organic acids include maleic, fumaric, benzoic, ascorbic, succinic, methanesulfonic, acetic, trifluoroacetic, oxalic, nic, ic, salicylic, citric, ic, lactic, mandelic, cinnamic, aspartic, stearic, palmitic, glycolic, glutamic, and benzenesulfonic acids. le inorganic acids include hydrochloric, hydrobromic, sulfuric, oric, and nitric acids. Base addition salts included those salts that form with the carboxylate anion and include salts formed with organic and inorganic cations such as those chosen from the alkali and alkaline earth metals (for example, lithium, sodium, potassium, magnesium, barium and calcium), as well as the ammonium ion and substituted derivatives thereof (for example, ylammonium, benzylammonium, 2-hydroxyethylammonium, and the like). Thus, the term "pharmaceutically acceptable salt" is intended to encompass any and all acceptable salt forms.

In addition, gs are also included within the context of this sure. Prodrugs are any covalently bonded carriers that release a compound in vivo when such prodrug is administered to a t. Prodrugs are generally prepared by ing functional groups in a way such that the modification is cleaved, either by routine manipulation or in vivo, yielding the parent compound. Prodrugs include, for example, compounds of this disclosure wherein hydroxy, amine or sulfhydryl groups are bonded to any group that, when administered to a patient, cleaves to form the hydroxy, amine or sulfhydryl groups. Thus, representative examples of prodrugs include (but are not d to) acetate, formate and te derivatives of alcohol and amine functional groups of the antisense oligomers of the disclosure. Further, in the case of a carboxylic acid ), esters may be employed, such as methyl esters, ethyl esters, and the like.

In some instances, liposomes may be employed to facilitate uptake of the antisense oligomer into cells (see, e.g., ms, S.A., ia :1980-1989, 1996; Lappalainen et al., ral Res. 23:119, 1994; Uhlmann et al., antisense ers: a new therapeutic principle, Chemical Reviews, Volume 90, No. 4, 25 pages 544-584, 1990; Gregoriadis, G., Chapter 14, Liposomes, Drug Carriers in Biology and Medicine, pp. 287-341, Academic Press, 1979). Hydrogels may also be used as vehicles for antisense oligomer administration, for example, as described in WO 93/01286. Alternatively, the oligomers may be administered in microspheres or microparticles. (See, e.g., Wu, G.Y. and Wu, C.H., J. Biol. Chem. 262:4429- 4432, 30 1987). Alternatively, the use of gas-filled microbubbles complexed with the antisense oligomers can enhance ry to target tissues, as described in US Patent No. 6,245,747.

Sustained release compositions may also be used. These may include semipermeable polymeric matrices in the form of shaped articles such as films or microcapsules.

In one embodiment, the antisense oligomer is administered to a mammalian subject, e.g., human or domestic animal, exhibiting the symptoms of a lysosomal storage disorder, in a suitable pharmaceutical carrier. In one aspect of the method, the subject is a human subject, e.g., a patient diagnosed as having GSD-II (Pompe disease). In one preferred embodiment, the antisense oligomer is contained in a pharmaceutically acceptable carrier, and is delivered orally.

In another preferred embodiment, the er is ned in a pharmaceutically acceptable carrier, and is red intravenously (i.v.).

In one embodiment, the antisense compound is administered in an amount and manner ive to result in a peak blood concentration of at least 0 nM nse oligomer.

Typically, one or more doses of nse oligomer are administered, generally at regular intervals, for a period of about one to two weeks. Preferred doses for oral administration are from about 1-1000 mg oligomer per 70 kg. In some cases, doses of greater than 1000 mg er/patient may be necessary. For i.v. stration, preferred doses are from about 0.5 mg to 1000 mg er per 70 kg. The antisense oligomer may be administered at regular intervals for a short time period, e.g., daily for two weeks or less. However, in some cases the oligomer is administered intermittently over a longer period of time. Administration may be followed by, or concurrent with, administration of an antibiotic or other therapeutic treatment.

The treatment regimen may be adjusted (dose, frequency, route, etc.) as indicated, based on the results of assays, other biochemical tests and physiological examination of the subject under treatment.

An effective in vivo treatment regimen using the antisense oligomers of the sure may vary according to the duration, dose, frequency and route of administration, as well as the condition of the subject under treatment (i.e., prophylactic administration versus administration in response to zed or systemic infection). Accordingly, such in vivo therapy will often require monitoring by tests appropriate to the particular type of disorder under treatment, and corresponding adjustments in the dose or treatment regimen, in order to achieve an optimal therapeutic outcome.

Treatment may be monitored, e.g., by general indicators of disease known in the art. The efficacy of an in vivo administered antisense oligomer of the disclosure may be determined from biological samples (tissue, blood, urine etc.) taken from a subject prior to, during and subsequent to stration of the antisense er. Assays of such samples include (1) monitoring the presence or absence of heteroduplex formation with target and non-target sequences, using ures known to those skilled in the art, e.g., an electrophoretic gel mobility assay; (2) monitoring the amount of a mutant mRNA in relation to a reference normal mRNA or protein as determined by standard techniques such as RT-PCR, Northern blotting, ELISA or Western blotting.

In some embodiments, the antisense oligomer is actively taken up by mammalian cells.

In r embodiments, the antisense oligomer may be conjugated to a transport moiety (e.g., transport peptide or CPP) as described herein to facilitate such uptake.

VI. Dosing The formulation of therapeutic compositions and their subsequent administration (dosing) is believed to be within the skill of those in the art. Dosing is dependent on severity and responsiveness of the disease state to be treated, with the course of treatment lasting from several days to several months, or until a cure is effected or a diminution of the disease state is ed. Optimal dosing schedules can be calculated from measurements of drug accumulation in the body of the patient. Persons of ordinary skill can easily ine optimum dosages, dosing methodologies and repetition rates. Optimum dosages may vary ing on the relative potency of individual oligomers, and can lly be estimated based on EC50s found to be effective in in vitro and in vivo animal models. In general, dosage is from 0.01 μg to 100 g per kg of body , and may be given once or more daily, , monthly or yearly, or even once every 2 to 20 years. s of ordinary skill in the art can easily estimate repetition rates for dosing based on measured residence times and concentrations of the drug in bodily fluids or tissues. Following successful treatment, it may be desirable to have the patient o maintenance therapy to prevent the recurrence of the e state, wherein the oligomer is administered in maintenance doses, ranging from 0.01 μg to 100 g per kg of body weight, once or more daily, to once every 20 years.

While the present disclosure has been described with specificity in accordance with certain of its embodiments, the following examples serve only to illustrate the disclosure and are not intended to limit the same. Each of the references, patents, patent applications, k ion numbers, and the like recited in the present ation are incorporated herein by reference in its entirety.

VII. Examples EXAMPLE 1 DESIGN OF ANTISENSE TARGETING SEQUENCES Antisense oligomer targeting sequences were ed for therapeutic splice-switching applications related to the IVS1-13T>G mutation in the human GAA gene. Here, it is expected that splice-switching oligomers will suppress intronic and exonic splice silencer elements (ISS and ESS elements, respectively) and thereby promote exon 2 retention in the mature GAA mRNA. ation of normal or near-normal GAA expression would then allow functional enzyme to be synthesized, thereby providing a clinical benefit to GSD-II patients.

Certain antisense targeting sequences were thus designed to mask splice silencer elements, either within exon 2 of the GAA gene or within its flanking introns. Non-limiting examples of potential silencer element targets include hnRNPA1 motifs (TAGGGA), Tra2-β motifs, and 9G8 motifs. In silico secondary structure analysis (mFold) of introns 1 and 2 (IVS1 and IVS2, respectively) mRNAs was also employed to identify long distance interactions that could provide suitable antisense target sequences. The antisense targeting sequences resulting from this analysis are shown in Tables 2A-2C .

Exemplary oligomers comprising a targeting sequence as set forth in Tables 2A-2C were prepared as PMOs and/or PPMOs (oligomers conjugated to a CPP, such as an arginine-rich CPP). As described below, these antisense oligomers were introduced into GSD -II patientderived fibroblasts using a nucleofection protocol as also described in Example 2 below.

EXAMPLE 2 MATERIALS AND METHODS GSD-II cells. Patient-derived fibroblasts or lymphocytes from duals with GSD-II (Coriell cell lines GM00443 and GM11661) were ed according to standard protocols in Eagle’s MEM with 10% FBS. Cells were passaged about 3-5 days before the ments and are approximately 80% confluent at transfection or fection.

GM00443 fibroblasts are from a 30 year old male. Adult form; onset in third decade; normal size and amount of mRNA for GAA, GAA protein detected by antibody, but only 9 to 26% of normal acid-alpha-1,4 idase activity; passage 3 at CCR; donor subject is zygous with one allele carrying a T>G transversion at position -13 of the acceptor site of intron 1 of the GAA gene, resulting in alternatively spliced transcripts with deletion of the first coding exon [exon 2 (IVS1-13T>G)]. 1 fibroblasts are from a 38 year old male. Abnormal liver function tests; occasional charley-horse in legs during physical activity; morning headaches; intolerance to greasy foods; abdominal cyst; deficient fibroblast and WBC lpha-1,4 glucosidase activity; donor subject is a compound heterozygote: allele one carries a T>G transversion at position -13 of the acceptor site of intron 1 of the GAA gene (IVS1-13T>G); the resulting alternatively spliced transcript has an in frame deletion of exon 2 which contains the initiation codon; allele two carries a deletion of exon 18.

Nucleofection ol. Antisense PMOs/PPMOs (PMOs conjugated to an arginine-rich peptide) are prepared as 1-2 mM stock solutions in nuclease-free water (not d with DEPC) from which appropriate ons are made for nucleofection. GSD-II cells are trypsinized, d, centrifuged at 90g for 10 minutes, and 1-5x105 cells per well are resuspended in nucleofection Solution P2 (Lonza). Antisense PMO solution and cells are then added to each well of a Nucleocuvette 16-well strip, and pulsed with program EN-100. Cells are incubated at room temperature for 10 s and transferred to a 12-well plate in duplicate. Total RNA is isolated from treated cells after 48 hours using the GE Illustra 96 Spin kit following the manufacturer’s recommended protocol. red RNA is stored at -80°C prior to analysis.

GAA RT-PCR. For PCR detection of exon 2-containing mRNAs, primer sequences are chosen from exon 1(forward) to exon 3(reverse). RT-PCR across exons 1-3 will generate a full length on of around 1177 bases. The size difference between the intact amplicon (~1177 bases) and the ~600 base transcript that is missing exon 2 (exon 2 is ~578 bases) means there will be substantial preferential amplification of the shorter product. This will set a high benchmark in assaying the efficacy of antisense oligomers to induce splicing of the full-length transcript or exon2-containing transcript.

Reverse riptase PCR is performed to y the GAA allele using the SuperScript III One-Step RT-PCR system (Invitrogen). 400 ng total RNA isolated from nucleofected cells is reverse transcribed and amplified with the pecific primers.

The amplification solution provided in the One-Step kit is supplemented with Cy5- labeled dCTP (GE) to enable band visualization by fluorescence. Digested s are run on a pre-cast 10% acrylamide/TBE gel (Invitrogen) and ized on a Typhoon Trio (GE) using the 633nm excitation laser and 670nm BP 30 emission filter with the focal plane at the platen surface. Gels are analyzed with ImageQuant (GE) to determine the intensities of the bands.

Intensities from all bands containing exon 2 are added together to represent the full exon 2 transcript levels in the inclusion analysis.

Alternatively, PCR amplification products (without the supplemented Cy5-labeled dCTP) are analyzed on a Caliper LabChip GX bioanalyzer or Agilent 2200 Tape Station for determination of % exon inclusion.

GAA Enzyme Assay & Protein Simple Wes. Untransformed patient-derived fibroblasts (GM00443) were nucleofected with PMO at various trations in Lonza’s P3 nucleofector solution and incubated at 37°C with 5% CO2 for six days. Cells were washed twice with Hank’s Balanced Salt Solution , lysed with unbuffered H2O, frozen/thawed three times, and then shaken at 1000 rpm for 1 minute. The Bio-Rad DC™ Assay Kit was used to quantify total protein tration. For the enzyme assay, cell lysate was combined with 1.4 mM 4- methylumbelliferyl α-D-glucopyranoside in 0.2 M acetate buffer (pH 3.9 or 6.5), incubated at 37°C for three hours, and then fluorescence was read at 360 nm tion and 460 nm emission.

A standard curve was generated using ylumbelliferone.

A Western blot on GAA protein was performed using the ProteinSimple® Wes™ system (12-230 kDa Master Kit). Rabbit anti-GAA antibody [clone EPR4716(2)] from Abcam was diluted 1:100 and was duplexed with mouse anti-GAPDH [clone 6c5] from Santa Cruz Biotechnology diluted 1:5. Mouse and rabbit secondary dies from ProteinSimple® were combined 1:1 for duplexing. GAA was quantified using nSimple® s software as area under the curve for all forms of GAA and normalized to GAPDH.

EXAMPLE 3 PREPARATION OF ANTISENSE PMOS AND PPMOS Antisense PMOs were designed to target the human GAA pre-mRNA (e.g., intron 1 of the human GAA pre-mRNA) were synthesized as described herein and used to treat GSD-II tderived fibroblasts.

Table 4A Nucleofected PMO or PPMO Compounds (Internal Deletion Sequences) ' 3' CPP SEQ Targeting Sequence (TS)* Attachmen Attachment ID NO Name SEQ (5’-3’) t *** ID NO GAA-IVS1.SA.(-189,- GGC CAG AAG GAA 13 TEG H 165)-G GGC GAG AAA AGC GAA-IVS1.SA.(-190,- GCC AGA AGG AAG GC 87 TEG H 166)-G GAG AAA AGC T GAA-IVS1.SA.(-191,- CCA GAA GGA AGG 88 TEG H 167)-G CGA GAA AAG CTC GAA-IVS1.SA.(-192,- CAG AAG GAA GGC 89 TEG H 168)-G GAG AAA AGC TCC GAA-IVS1.SA.(-193,- AGA AGG AAG GCG 90 TEG H 169)-G AGA AAA GCT CCA GAA-IVS1.SA.(-194,- GAA GGA AGG CGA 91 TEG H 170)-G GAA AAG CTC CAG GAA-IVS1.SA.(-195,- AAG GAA GGC GAG 92 TEG H 171)-G AAA AGC TCC AGC GAA-IVS1.SA.(-196,- AGG AAG GCG AGA 93 TEG H 172)-G AAA GCT CCA GCA GAA-IVS1(52)-2G CGG CTC TCA AAG 94 TEG H CAG CTC TGA GA GAA-IVS1(51)-2G ACG GCT CTC AAA 95 TEG H GCA GCT CTG AG GAA-IVS1(50)-2G CAC GGC TCT CAA AGC 96 TEG H AGC TCT GA GAA-IVS1(49)-2G TCA CGG CTC TCA AAG 97 TEG H CAG CTC TG GAA-IVS1(48)-2G CTC ACG GCT CTC AAA 98 TEG H GCA GCT CT GAA-IVS1(47)-2G ACT CAC GGC TCT CAA 99 TEG H AGC AGC TC S1(42)-2G GCG GCA CTC ACG GCT 100 TEG H CTC AAA GC GAA-IVS1(41)-2G GGC GGC ACT CAC 101 TEG H GGC TCT CAA AG GAA-IVS1(43)-2G CGG CAC TCA CGG CTC 102 TEG H TCA AAG CA Table 4A Nucleofected PMO or PPMO Compounds (Internal Deletion Sequences) ' 3' CPP SEQ ing Sequence (TS)* Attachmen Attachment ID NO Name SEQ (5’-3’) t *** ID NO GAA-IVS1(45)-2G GCA CTC ACG GCT CTC 103 TEG H AAA GCA GC GAA-IVS1(44)-2G GGC ACT CAC GGC TCT 104 TEG H CAA AGC AG GAA-IVS1(46)-2G CAC TCA CGG CTC TCA 105 TEG H AAG CAG CT GAA-IVS1.SA.(-189,- GCC AGA AGG AAG 33 TEG H 166)-G GCG AGA AAA GC GAA-IVS1.SA.(-189,- CCA GAA GGA AGG 34 TEG H 167)-G CGA GAA AAG C S1.SA.(-189,- CAG AAG GAA GGC TEG H 168)-G GAG AAA AGC S1.SA.(-188,- GGC CAG AAG GAA 36 TEG H 165)-G GGC GAG AAA AG GAA-IVS1.SA.(-187,- GGC CAG AAG GAA 37 TEG H 165)-G GGC GAG AAA A GAA-IVS1.SA.(-186,- GGC CAG AAG GAA 38 TEG H 165)-G GGC GAG AAA GAA-IVS1(43)- CGG CAC TCA CGGC 106 TEG R6G 11 2G/R6 TCT CAA AGC A GAA-IVS1(42)- GCG GCA CTC ACGG 107 TEG R6G 11 2G/R6 CTC TCA AAG C GAA-IVS1(41)- GGC GGC ACT CAC G 108 TEG R6G 11 2G/R6 GCT CTC AAA G GAA-IVS1.SA.(-189,- CCA GAA GGA AGG 34 TEG R6G 11 167)-G/R6 CGA GAA AAG C GAA-IVS1.SA.(-189,- CAG AAG GAA GGC TEG R6G 11 168)-G/R6 GAG AAA AGC GAA-IVS1.SA.(-188,- GGC CAG AAG GAA 36 TEG R6G 11 /R6 GGC GAG AAA AG GAA-IVS1.SA.(-189,- GGC CAG AAG GAA 13 TEG R6G 11 165)-G/R6 GGC GAG AAA AGC GAA-IVS1.SA.(-180,- TGG GGA GAG GGC 109 TEG H 156)-G CAG AAG GAA GGC GAA-IVS1.SA.(-180,- TGG GGA GAG GGC 110 TEG H 156)-2G CAG AAG GAA GC GAA-IVS1.SA.(-180,- TGG GGA GAG GGC 111 TEG H 156)-3G CAG AAG GAA C GAA-IVS1.SA.(-189,- GGC CAG AAG GAA 45 TEG H 165)-2G GCG AGA AAA GC GAA-IVS1.SA.(-189,- GGC CAG AAG GAA 46 TEG H 165)-3G CGA GAA AAG C GAA-IVS1.SA.(-196,- AGG AAG CGA GAA 112 TEG H 172)-2G AAG CTC CAG CA GAA-IVS1.SA.(-196,- AGG AAC GAG AAA 113 TEG H 172)-3G AGC TCC AGC A GAA-IVS1(52)-G CGG GCT CTC AAA 114 TEG H GCA GCT CTG AGA Table 4A Nucleofected PMO or PPMO Compounds (Internal Deletion Sequences) ' 3' CPP SEQ Targeting Sequence (TS)* Attachmen Attachment ID NO Name SEQ (5’-3’) t *** ID NO GAA-IVS1(52)-3G CGC TCT CAA AGC AGC 115 TEG H TCT GAG A GAA-IVS1(52)-4G CCT CTC AAA GCA GCT 116 TEG H CTG AGA GAA-IVS1(41)-G GGC GGC ACT CAC 117 TEG H GGG CTC TCA AAG GAA-IVS1(41)-3G GGC GGC ACT CAC GCT 118 TEG H CTC AAA G GAA-IVS1(41)-4G GGC GGC ACT CAC CTC 119 TEG H TCA AAG S1(33)-G GCG GGA GGG GCG 120 TEG H GCA CTC ACG GGC GAA-IVS1(33)-2G GCG GGA GGG GCG 121 TEG H GCA CTC ACG GC S1(33)-3G GCG GGA GGG GCG 122 TEG H GCA CTC ACG C GAA-IVS1(33)-4G GCG GGA GGG GCG 123 TEG H GCA CTC ACC nes (T) are optionally uracils (U).

**TEG is defined above.

Table 4B Nucleofected PMO or PPMO compounds ' 3' CPP SEQ Targeting Sequence (TS)* Attachmen Attachment ID NO Name SEQ (5’-3’) t *** ID NO GAA-IVS1.SA.(-189,- GGC CAG AAG GAA 59 TEG H 165) GGG CGA GAA AAG C GAA-IVS1.SA.(-191,- CCA GAA GGA AGG 124 TEG H 167) GCG AGA AAA GCT C GAA-IVS1.SA.(-195,- AAG GAA GGG CGA 125 TEG H 171) GAA AAG CTC CAG C GAA-IVS1(33) GCG GGA GGG GCG 126 TEG H GCA CTC ACG GGG C GAA-IVS1.SA.(-180,- TGG GGA GAG GGC 127 TEG H 156) CAG AAG GAA GGG C GAA-IVS1.SA.(-189,- GGC CAG AAG GAA 59 TEG R6G 11 6 GGG CGA GAA AAG C GAA-IVS1(55)-R6 GGC TCT CAA AGC 128 TEG R6G 11 AGC TCT GA GAA-IVS1.SA.(-193,- AGA AGG AAG GGC 129 TEG H 169) GAG AAA AGC TCC A GAA-IVS1(56) GCT CTC AAA GCA GCT 130 TEG H CTG AGA CAT C Table 4B Nucleofected PMO or PPMO compounds ' 3' CPP SEQ Targeting Sequence (TS)* Attachmen Attachment ID NO Name SEQ (5’-3’) t *** ID NO GAA-IVS1(57) CTC TCA AAG CAG CTC 131 TEG H TGA GAC ATC A GAA-IVS1(58) TCT CAA AGC AGC TCT 132 TEG H GAG ACA TCA A S1(59) CTC AAA GCA GCT CTG 133 TEG H AGA CAT CAA C GAA-IVS1(60) TCA AAG CAG CTC TGA 134 TEG H GAC ATC AAC C GAA-IVS1(61) CAA AGC AGC TCT 135 TEG H GAG ACA TCA ACC G GAA-IVS1(62) AAA GCA GCT CTG 136 TEG H AGA CAT CAA CCG C GAA-IVS1(63) AAG CAG CTC TGA 137 TEG H GAC ATC AAC CGC G GAA-IVS1(64) AGC AGC TCT GAG 138 TEG H ACA TCA ACC GCG G GAA-IVS1(65) GCA GCT CTG AGA CAT 139 TEG H CAA CCG CGG C GAA-IVS1(66) CAG CTC TGA GAC ATC 140 TEG H AAC CGC GGC T *Thymines (T) are optionally uracils (U).

**TEG is defined above.

Table 4C Nucleofected PMO or PPMO compounds TS 5' 3' Targeting Sequence (TS)* Name SEQ Attachment Attachment (5’-3’) ID NO ** ** S1.SA.(-190,- GCC AGA AGG AAG 141 TEG H 166) GGC GAG AAA AGC T GAA-IVS1.SA.(-192,- CAG AAG GAA GGG 142 TEG H 168) CGA GAA AAG CTC C GAA-IVS1.SA.(-194,- GAA GGA AGG GCG 143 TEG H 170) AGA AAA GCT CCA G GAA-IVS1.SA.(-196,- AGG AAG GGC GAG 144 TEG H 172) AAA AGC TCC AGC A S1(47) ACT CAC GGG GCT CTC 145 TEG H AAA GCA GCT C GAA-IVS1(55) GGCTCTCAAAGCAGCT 146 TEG H CTGAGACAT GAA-IVS1(55) GGC TCT CAA AGC 128 TEG H AGC TCT GA GAA-IVS1(160) GAG AGG GCC AGA 83 TEG H AGG AAG GG GAA-IVS1.2178.20 TTT GCC ATG TTA CCC 146 TEG H AGG CT Table 4C Nucleofected PMO or PPMO compounds TS 5' 3' Targeting Sequence (TS)* Name SEQ Attachment Attachment (5’-3’) ID NO ** ** S2.27.20 GCG CAC CCT CTG CCC 147 TEG H TGG CC GAAEx2A(+202+226) GGC CCT GGT CTG CTG 148 TEG H GCT CCC TGC T *Thymines (T) are optionally uracils (U).

**TEG is defined above.

EXAMPLE 4 ANTISENSE OLIGOMERS INDUCE ELEVATED SION LEVELS OF ACID ALPHA- GLUCOSIDASE IN GSD-II PATIENT-DERIVED FIBROBLASTS The above-described antisense PMOs and PPMOs were red to GM00443 or GM11661 cells by nucleofection (see above, e.g., Materials and Methods). After six days of incubation at 37°C with 5% CO2, cells were lysed and GAA activity in the s or GAA protein expression was measured by immunoassay as described above. In l, protein expression of GAA enzyme in cells treated with antisense oligonucleotides of the disclosure was higher than the GAA expression level in untreated cells, (see specific experimental results below). These results te that oligonucleotides of the disclosure induce elevated protein sion levels of GAA enzyme in GSD-II patient-derived fibroblasts. While not being bound by any theory or mechanism of action, in view of the experimental results described herein, the inventors believe that the oligomers of the disclosure suppress ISS and/or ESS elements and thereby promote exon 2 retention in the mature GAA mRNA.

As detailed in the following experiments, a series of variant PPMO and PMO oligonucleotides were evaluated for their ability to increase expression and/or activity of the GAA enzyme in cells from patients with Pompe disease. The targeting sequence of the variant oligonucleotides are complementary to a target region within intron 1 (SEQ ID NO: 1) of a premRNA of the human alpha glucosidase (GAA) gene, wherein the target region comprises one, two, three, or four additional nucleobases compared to the targeting sequence, wherein those additional nucleobases are cytosines, and wherein the one, two, three, or four additional bases have no corresponding complementary nucleobases in the targeting sequence (hence, the "-G" (guanine), "-2G", "-3G", or "-4G" tions). The additional nucleobases are internal to the target . Surprisingly it was discovered that many of these t oligonucleotides had the same or similar activity to oligonucleotides having the corresponding riant targeting sequence (see, e.g., Figs. 10b and 16). In some ces, oligonucleotides having t ing sequences were more active at increasing GAA enzyme activity in patient cells, as compared to oligonucleotides having the corresponding non-variant targeting sequence (see, e.g., Fig. 16). For example, as shown in Fig. 16, two different oligonucleotides having variant targeting sequences with one fewer G residue, as compared to oligonucleotides with targeting sequences that are 100% mentary to the GAA (non-variant), were more active at increasing GAA in fibroblasts derived from Pompe patients (Fig. 16).

MENT 1 Selected oligonucleotides were evaluated in GM00443 cells at multiple doses (5 M, and 0.2 M). Following tion of nucleofected cells for six days, lysates were ed as above and the GAA enzyme activity was measured in the lysates. As shown in Figs. 1 and 2, the lysates of cells treated with each of these compounds at all concentrations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in s from ted cells.

EXPERIMENT 2 In another ment, selected oligonucleotides were evaluated in GM00443 cells at multiple doses (5 M, 1 M, 0.2 M, and 0.4 M). As shown in Figs. 3 and 4, the lysates of cells treated with each of these compounds at all concentrations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in lysates from untreated cells.

EXPERIMENT 3 In another experiment, selected oligonucleotides were evaluated in GM00443 cells at multiple doses (5 M, 1 M, 0.2 M, and 0.04 M). As shown in Figs. 5-8, the lysates of cells treated with each of these compounds at all trations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in lysates from untreated cells.

EXPERIMENT 4 In another experiment, selected oligonucleotides were evaluated in 3 cells at multiple doses (5 M, 1.6 M, 0.5 M, and 0.16 M). As shown in Fig. 9, the lysates of cells treated with each of these compounds at all concentrations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in lysates from untreated cells.

EXPERIMENT 5 In another experiment, ed oligonucleotides were evaluated in GM00443 cells at multiple doses (5 M, 1.6 M, 0.5 M, and 0.16 M). As shown in Fig. 10a, the lysates of cells treated with each of these compounds at all concentrations tested exhibited increased GAA enzyme activity as ed to the GAA enzyme activity level in lysates from untreated cells.

EXPERIMENT 6 In another ment, selected oligonucleotides were ted in GM11661 cells at multiple doses (5 M, 1.6 M, 0.5 M, and 0.16 M). As shown in Fig. 10b, the s of cells treated with each of these compounds at all concentrations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme ty level in lysates from untreated cells.

EXPERIMENT 7 In another experiment, selected oligonucleotides were ted in GM00443 cells at multiple doses (5 M, 1.6 M, 0.5 M, and 0.16 M). As shown in Figs. 11 and 12, the lysates of cells treated with each of these compounds at all concentrations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in lysates from ted cells.

EXPERIMENT 8 In another experiment, ed oligonucleotides were evaluated in GM00443 cells at multiple doses (5 M, 1.6 M, 0.5 M, and 0.16 M). As shown in Fig. 13a, the s of cells treated with each of these compounds at all concentrations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in lysates from untreated cells.

EXPERIMENT 9 In another experiment, selected oligonucleotides were evaluated in GM11661 cells at multiple doses (5 M, 1.6 M, 0.5 M, and 0.16 M). As shown in Fig. 13b, the lysates of cells treated with each of these compounds at all concentrations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in lysates from untreated cells.

EXPERIMENT 10 In another experiment, selected oligonucleotides were evaluated in GM00443 cells at multiple doses (5 M, 1.6 M, 0.5 M, and 0.16 M). As shown in Fig. 14, the lysates of cells treated with each of these compounds at all trations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in lysates from untreated cells.

EXPERIMENT 11 In another experiment, selected PPMO oligonucleotides were evaluated in 3 cells at multiple doses (5 M, 1.6 M, 0.5 M, and 0.16 M). As shown in Fig. 15a, the lysates of cells d with each of these compounds at all concentrations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in s from untreated cells.

EXPERIMENT 12 In another experiment, selected PPMO oligonucleotides were evaluated in GM11661 cells at multiple doses (5 M, 1.6 M, 0.5 M, and 0.16 M). As shown in Fig. 15b, the lysates of cells treated with each of these compounds at all concentrations tested exhibited increased GAA enzyme ty as compared to the GAA enzyme activity level in lysates from untreated cells.

EXPERIMENT 13 In another experiment, selected oligonucleotides were evaluated in GM00443 cells at the single dose of 5M. As shown in Fig. 16, the lysates of cells treated with each of these nds at all concentrations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in lysates from untreated cells.

MENT 14 In another experiment, ed PPMO oligonucleotides were evaluated in GM00443 cells at multiple doses (5 M, 1.6 M, and 0.5 M). As shown in Fig. 17, the lysates of cells treated with each of these compounds at all concentrations tested ted increased GAA enzyme activity as compared to the GAA enzyme activity level in lysates from untreated cells. onally, the EC50 (M) ranged from 0.042 to 0.836.

EXPERIMENT 15 In another experiment, selected PPMO oligonucleotides were evaluated in GM11661 cells at multiple doses (5 M, 1.6 M, and 0.5 M). As shown in Fig. 18, the lysates of cells treated with each of these compounds at all concentrations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme ty level in lysates from untreated cells.

Additionally, the EC50 (M) ranged from 0.086 to 0.414.

EXPERIMENT 16 Fig. 19 provides a tabular summary of the the EC50 (M) values for selected PPMO ucleotides evaluated in both GM00443 and GM11661 cells, averaged over three experiments, N=9.

EXPERIMENT 17 In another experiment, selected PPMO ucleotides were evaluated in GM00443 cells at multiple doses (5 M, 1.6 M, and 0.5 M). As shown in Fig. 20, the lysates of cells treated with each of these compounds at all concentrations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in lysates from untreated cells.

Additionally, the EC50 (M) ranged from 0.149 to 0.896.

MENT 18 In another experiment, selected PPMO oligonucleotides were evaluated in GM00443 cells at multiple doses (5 M, 1.6 M, and 0.5 M). As shown in Fig. 21, the s of cells treated with each of these compounds at all trations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in lysates from untreated cells.

Additionally, the EC50 (M) ranged from 0.100 to 0.550.

EXPERIMENT 19 In another experiment, selected PPMO oligonucleotides were evaluated in GM00443 cells at multiple doses (5 M, 1.6 M, and 0.5 M). As shown in Fig. 22, the lysates of cells treated with each of these compounds at all concentrations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in lysates from untreated cells.

Additionally, the EC50 (M) ranged from 0.025 to 0.675.

EXPERIMENT 20 Fig. 23 provides a tabular summary of the the EC50 (M) values for ed PPMO oligonucleotides evaluated in both GM00443 and GM11661 cells, averaged across all assays, EXPERIMENT 21 In another experiment, selected PPMO ucleotides were evaluated in GM11661 cells at multiple doses (5 M, 1.6 M, and 0.5 M). As shown in Fig. 24, the lysates of cells treated with each of these compounds at all concentrations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in lysates from untreated cells.

Additionally, the EC50 (M) ranged from 0.144 to 0.630.

EXPERIMENT 22 In another experiment, selected PPMO oligonucleotides were evaluated in GM11661 cells at multiple doses (5 M, 1.6 M, and 0.5 M). As shown in Fig. 25, the lysates of cells treated with each of these compounds at all concentrations tested exhibited increased GAA enzyme activity as compared to the GAA enzyme activity level in lysates from untreated cells.

Additionally, the EC50 (M) ranged from 0.128 to 0.763.

EXPERIMENT 23 In another experiment, selected PPMO oligonucleotides were ted in GM11661 cells at multiple doses (5 M, 1.6 M, and 0.5 M). As shown in Fig. 26, the lysates of cells d with each of these compounds at all concentrations tested exhibited sed GAA enzyme activity as compared to the GAA enzyme ty level in lysates from untreated cells.

Additionally, the EC50 (M) ranged from 0.002 to 0.218.

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