WO2014059364A1

WO2014059364A1 - Methods of treating kennedy's disease

Info

Publication number: WO2014059364A1
Application number: PCT/US2013/064680
Authority: WO
Inventors: Gene Hung
Original assignee: Isis Pharmaceuticals, Inc.
Priority date: 2012-10-11
Filing date: 2013-10-11
Publication date: 2014-04-17
Also published as: EP4052709A1; ES2907254T3; US9523094B2; EP2906225A4; US20150284725A1; EP2906225B1; EP2906225A1

Abstract

Certain embodiments are directed to methods of ameliorating, treating, or preventing Kennedy's Disease in a subject carrying a mutation in the Androgen Receptor (AR) gene, such as expansion of a CAG trinucleotide repeat, which is associated with Kennedy's Disease, by administering an antisense compound targeted to AR. Several embodiments provided herein relate to the discovery that antisense compounds targeting Androgen Receptor can ameliorate, treat, or prevent Kennedy's Disease in a subject carrying a mutation in the Androgen Receptor gene, such as expansion of a CAG trinucleotide repeat, which is associated with Kennedy's Disease.

Description

METHODS OF TREATING KENNEDY'S DISEASE

Sequence Listing

The present application is being filed along with a Sequence Listing in electronic format. The Sequence Listing is provided as a file entitled BIOL0195WOSEQ.txt created October 11, 2012, which is approximately 351 KB in size. The information in the electronic format of the sequence listing is incorporated herein by reference in its entirety.

Field

Certain embodiments are directed to methods of ameliorating, treating, or preventing Kennedy's Disease in a subject carrying a mutation in the Androgen Receptor (AR) gene, such as expansion of a CAG trinucleotide repeat, which is associated with Kennedy's Disease, by administering an antisense compound targeted to AR.

Background

Kennedy's Disease, also known as Spinal Bulbar Muscular Atrophy, bulbo-spinal atrophy, X- linked bulbospinal neuropathy (XBSN), or X-linked spinal muscular atrophy type 1 (SMAX1), is a neuromuscular degenerative disease affecting males who carry a mutation in the Androgen Receptor (AR) gene on the X chromosome. Kennedy's Disease is caused by expansion of a trinucleotide CAG repeat in exon 1 of the androgen receptor gene that encodes a polyglutamine tract in the androgen receptor protein.

There is a positive correlation between CAG repeat length and disease severity, and a negative correlation between repeat length and the age of disease onset. The number of CAG repeats in Kennedy's Disease patients varies, but can be in the range of about 36-62 repeats. Kennedy's Disease is characterized by the degeneration and loss of lower motor neurons in the brainstem and spinal cord, together with progressive weakness, atrophy and fasciculation of proximal limb and bulbar muscles combined with sensory impairment. Kennedy's Disease usually develops in middle adult life, but onset and severity of the disease can vary from adolescence to old age.

Currently there are no cures or treatments for Kennedy's Disease. Males suffering from

Kennedy's Disease commonly end up in a wheelchair as a result of motor neuron degeneration and muscle wasting, and are subsequently at higher risk of developing other ailments.

Summary Several embodiments provided herein relate to the discovery that antisense compounds targeting Androgen Receptor can ameliorate, treat, or prevent Kennedy's Disease in a subject carrying a mutation in the Androgen Receptor gene, such as expansion of a CAG trinucleotide repeat, which is associated with Kennedy's Disease. Certain embodiments are drawn to increasing muscle strength, improving muscle atrophy, and/or inhibiting muscle denervation in a subject having Kennedy's Disease, thereby treating Kennedy's Disease. Certain embodiments relate to preventing the onset of Kennedy's Disease and its symptoms or complications in a subject having an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease. Certain embodiments are drawn to preventing muscle strength loss, preventing muscle atrophy, and/or preventing muscle denervation in a subject having an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, thereby preventing Kennedy's Disease.

Detailed Description

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed. Herein, the use of the singular includes the plural unless specifically stated otherwise. As used herein, the use of "or" means "and/or" unless stated otherwise. Furthermore, the use of the term "including" as well as other forms, such as "includes" and "included", is not limiting. Also, terms such as "element" or "component" encompass both elements and components comprising one unit and elements and components that comprise more than one subunit, unless specifically stated otherwise.

The section headings used herein are for organizational purposes only and are not to be construed as limiting the subject matter described. All documents, or portions of documents, cited in this application, including, but not limited to, patents, patent applications, articles, books, and treatises, are hereby expressly incorporated by reference for the portions of the document discussed herein, as well as in their entirety.

It is understood that the sequence set forth in each SEQ ID NO in the examples contained herein is independent of any modification to a sugar moiety, an internucleoside linkage, or a nucleobase. As such, antisense compounds defined by a SEQ ID NO may comprise, independently, one or more modifications to a sugar moiety, an internucleoside linkage, or a nucleobase. Antisense compounds described by ISIS number (ISIS #) indicate a combination of nucleobase sequence, chemical modification, and motif.

Definitions

Unless specific definitions are provided, the nomenclature utilized in connection with, and the procedures and techniques of, analytical chemistry, synthetic organic chemistry, and medicinal and pharmaceutical chemistry described herein are those well known and commonly used in the art. Standard techniques may be used for chemical synthesis, and chemical analysis. Where permitted, all patents, applications, published applications and other publications, GENBANK Accession Numbers and associated sequence information obtainable through databases such as National Center for Biotechnology Information (NCBI) and other data referred to throughout in the disclosure herein are incorporated by reference for the portions of the document discussed herein, as well as in their entirety.

Unless otherwise indicated, the following terms have the following meanings:

"2'-0-methoxyethyl" (also 2'-MOE and 2'-0(CH₂)2-OCH₃) refers to an O-methoxy-ethyl modification at the 2' position of a furanose ring. A 2'-0-methoxyethyl modified sugar is a modified sugar.

"2'-MOE nucleoside" (also 2'-0-methoxyethyl nucleoside) means a nucleoside comprising a 2'- MOE modified sugar moiety.

"2' -substituted nucleoside" means a nucleoside comprising a substituent at the 2'-position of the furanosyl ring other than H or OH. In certain embodiments, 2' substituted nucleosides include nucleosides with bicyclic sugar modifications.

"3' target site" refers to the nucleotide of a target nucleic acid which is complementary to the 3'- most nucleotide of a particular antisense compound.

"5' target site" refers to the nucleotide of a target nucleic acid which is complementary to the 5'- most nucleotide of a particular antisense compound.

"5-methylcytosine" means a cytosine modified with a methyl group attached to the 5 position. A

5-methylcytosine is a modified nucleobase.

"About" means within ±7% of a value. For example, if it is stated, "the compounds affected at least about 70% inhibition of Androgen Receptor", it is implied that Androgen Receptor levels are inhibited within a range of 63% and 77%.

"Administration" or "administering" refers to routes of introducing an antisense compound provided herein to a subject to perform its intended function. An example of a route of administration that can be used includes, but is not limited to parenteral administration, such as subcutaneous, intravenous, or intramuscular injection or infusion.

"Amelioration" refers to a lessening of at least one indicator, sign, or symptom of an associated disease, disorder, or condition. The severity of indicators can be determined by subjective or objective measures, which are known to those skilled in the art. "Animal" refers to a human or non-human animal, including, but not limited to, mice, rats, rabbits, dogs, cats, pigs, and non-human primates, including, but not limited to, monkeys and

chimpanzees.

"Antisense activity" means any detectable or measurable activity attributable to the hybridization of an antisense compound to its target nucleic acid. In certain embodiments, antisense activity is a decrease in the amount or expression of a target nucleic acid or protein encoded by such target nucleic acid.

"Antisense compound" means an oligomeric compound that is is capable of undergoing hybridization to a target nucleic acid through hydrogen bonding. Examples of antisense compounds include single-stranded and double-stranded compounds, such as, antisense oligonucleotides, siRNAs, shRNAs, ssRNAs, and occupancy-based compounds.

"Antisense inhibition" means reduction of target nucleic acid levels in the presence of an antisense compound complementary to a target nucleic acid compared to target nucleic acid levels in the absence of the antisense compound.

"Antisense mechanisms" are all those mechanisms involving hybridization of a compound with target nucleic acid, wherein the outcome or effect of the hybridization is either target degradation or target occupancy with concomitant stalling of the cellular machinery involving, for example, transcription or splicing.

"Antisense oligonucleotide" means a single-stranded oligonucleotide having a nucleobase sequence that permits hybridization to a corresponding region or segment of a target nucleic acid.

"Base complementarity" refers to the capacity for the precise base pairing of nucleobases of an antisense oligonucleotide with corresponding nucleobases in a target nucleic acid (i.e., hybridization), and is mediated by Watson-Crick, Hoogsteen or reversed Hoogsteen hydrogen binding between corresponding nucleobases.

"Bicyclic sugar moiety" means a modified sugar moiety comprising a 4 to 7 membered ring

(including but not limited to a furanosyl) comprising a bridge connecting two atoms of the 4 to 7 membered ring to form a second ring, resulting in a bicyclic structure. In certain embodiments, the 4 to 7 membered ring is a sugar ring. In certain embodiments the 4 to 7 membered ring is a furanosyl. In certain such embodiments, the bridge connects the 2 '-carbon and the 4' -carbon of the furanosyl.

"Cap structure" or "terminal cap moiety" means chemical modifications, which have been incorporated at either terminus of an antisense compound. "cEt" or "constrained ethyl" means a bicyclic sugar moiety comprising a bridge connecting the 4'-carbon and the 2'-carbon, wherein the bridge has the formula: 4'-CH(CH₃)-0-2'.

"Constrained ethyl nucleoside" (also cEt nucleoside) means a nucleoside comprising a bicyclic sugar moiety comprising a 4'-CH(CH₃)-0-2' bridge.

"Chemically distinct region" refers to a region of an antisense compound that is in some way chemically different than another region of the same antisense compound. For example, a region having 2'-0-methoxyethyl nucleotides is chemically distinct from a region having nucleotides without 2'-0- methoxyethyl modifications.

"Chimeric antisense compounds" means antisense compounds that have at least 2 chemically distinct regions, each position having a plurality of subunits.

"Complementarity" means the capacity for pairing between nucleobases of a first nucleic acid and a second nucleic acid.

"Comprise," "comprises" and "comprising" will be understood to imply the inclusion of a stated step or element or group of steps or elements but not the exclusion of any other step or element or group of steps or elements.

"Contiguous nucleobases" means nucleobases immediately adjacent to each other.

"Deoxyribonucleotide" means a nucleotide having a hydrogen at the 2' position of the sugar portion of the nucleotide. Deoxyribonucleotides may be modified with any of a variety of substituents.

"Designing" or "Designed to" refer to the process of designing an oligomeric compound that specifically hybridizes with a selected nucleic acid molecule.

"Efficacy" means the ability to produce a desired effect.

"Expression" includes all the functions by which a gene's coded information is converted into structures present and operating in a cell. Such structures include, but are not limited to the products of transcription and translation.

"Fully complementary" or "100% complementary" means each nucleobase of a first nucleic acid has a complementary nucleobase in a second nucleic acid. In certain embodiments, a first nucleic acid is an antisense compound and a target nucleic acid is a second nucleic acid.

"Gapmer" means a chimeric antisense compound in which an internal region having a plurality of nucleosides that support RNase H cleavage is positioned between external regions having one or more nucleosides, wherein the nucleosides comprising the internal region are chemically distinct from the nucleoside or nucleosides comprising the external regions. The internal region may be referred to as the "gap" and the external regions may be referred to as the "wings."

"Hybridization" means the annealing of complementary nucleic acid molecules. In certain embodiments, complementary nucleic acid molecules include, but are not limited to, an antisense compound and a nucleic acid target. In certain embodiments, complementary nucleic acid molecules include, but are not limited to, an antisense oligonucleotide and a nucleic acid target.

"Identifying" or "selecting" an animal with Kennedy's Disease or having an AR gene mutation associated with Kennedy's Disease means identifying or selecting a subject having been diagnosed with Kennedy's Disease, or an AR gene mutation associated with Kennedy's Disease such as a CAG trinucleotide repeat expansion in the AR gene; or, identifying or selecting a subject having any symptom of Kennedy's Disease, including, but not limited to, muscle fatigue, muscle cramping, muscle weakness, muscle atrophy, muscle twitching or tremoring; and/or bulbar signs such as difficulty with breathing, swallowing, and/or talking.

"Immediately adjacent" means there are no intervening elements between the immediately adj acent elements .

"Individual" means a human or non-human animal selected for treatment or therapy.

"Induce", "inhibit", "potentiate", "elevate", "increase", "decrease", upregulate", "downregulate", or the like, generally denote quantitative differences between two states.

"Inhibiting the expression or activity" refers to a reduction, blockade of the expression or activity and does not necessarily indicate a total elimination of expression or activity.

"Internucleoside linkage" refers to the chemical bond between nucleosides.

"Lengthened" antisense oligonucleotides are those that have one or more additional nucleosides relative to an antisense oligonucleotide disclosed herein.

"Linked deoxynucleoside" means a nucleic acid base (A, G, C, T, U) substituted by deoxyribose linked by a phosphate ester to form a nucleotide.

"Linked nucleosides" means adjacent nucleosides linked together by an internucleoside linkage.

"Mismatch" or "non-complementary nucleobase" refers to the case when a nucleobase of a first nucleic acid is not capable of pairing with the corresponding nucleobase of a second or target nucleic acid. "Modified internucleoside linkage" refers to a substitution or any change from a naturally occurring internucleoside bond (i.e. a phosphodiester internucleoside bond).

"Modified nucleobase" means any nucleobase other than adenine, cytosine, guanine, thymidine, or uracil. An "unmodified nucleobase" means the purine bases adenine (A) and guanine (G), and the pyrimidine bases thymine (T), cytosine (C) and uracil (U).

"Modified nucleoside" means a nucleoside having, independently, a modified sugar moiety and/or modified nucleobase.

"Modified nucleotide" means a nucleotide having, independently, a modified sugar moiety, modified internucleoside linkage, or modified nucleobase.

"Modified oligonucleotide" means an oligonucleotide comprising at least one modified internucleoside linkage, a modified sugar, and/or a modified nucleobase.

"Modified sugar" means substitution and/or any change from a natural sugar moiety.

"Monomer" refers to a single unit of an oligomer. Monomers include, but are not limited to, nucleosides and nucleotides, whether naturally occuring or modified.

"Motif means the pattern of unmodified and modified nucleosides in an antisense compound.

"Natural sugar moiety" means a sugar moiety found in DNA (2'-H) or RNA (2'-OH).

"Naturally occurring internucleoside linkage" means a 3' to 5' phosphodiester linkage.

"Non-complementary nucleobase" refers to a pair of nucleobases that do not form hydrogen bonds with one another or otherwise support hybridization.

"Nucleic acid" refers to molecules composed of monomeric nucleotides. A nucleic acid includes, but is not limited to, ribonucleic acids (RNA), deoxyribonucleic acids (DNA), single-stranded nucleic acids, and double-stranded nucleic acids.

"Nucleobase" means a heterocyclic moiety capable of pairing with a base of another nucleic acid.

"Nucleobase complementarity" refers to a nucleobase that is capable of base pairing with another nucleobase. For example, in DNA, adenine (A) is complementary to thymine (T). For example, in RNA, adenine (A) is complementary to uracil (U). In certain embodiments, complementary nucleobase refers to a nucleobase of an antisense compound that is capable of base pairing with a nucleobase of its target nucleic acid. For example, if a nucleobase at a certain position of an antisense compound is capable of hydrogen bonding with a nucleobase at a certain position of a target nucleic acid, then the position of hydrogen bonding between the oligonucleotide and the target nucleic acid is considered to be complementary at that nucleobase pair.

"Nucleobase sequence" means the order of contiguous nucleobases independent of any sugar, linkage, and/or nucleobase modification.

"Nucleoside" means a nucleobase linked to a sugar.

"Nucleoside mimetic" includes those structures used to replace the sugar or the sugar and the base and not necessarily the linkage at one or more positions of an oligomeric compound such as for example nucleoside mimetics having morpholino, cyclohexenyl, cyclohexyl, tetrahydropyranyl, bicyclo or tricyclo sugar mimetics, e.g., non firranose sugar units. Nucleotide mimetic includes those structures used to replace the nucleoside and the linkage at one or more positions of an oligomeric compound such as for example peptide nucleic acids or morpholinos (morpholinos linked by -N(H)-C(=0)-0- or other non- phosphodiester linkage). Sugar surrogate overlaps with the slightly broader term nucleoside mimetic but is intended to indicate replacement of the sugar unit (firranose ring) only. The tetrahydropyranyl rings provided herein are illustrative of an example of a sugar surrogate wherein the firranose sugar group has been replaced with a tetrahydropyranyl ring system. "Mimetic" refers to groups that are substituted for a sugar, a nucleobase, and/ or internucleoside linkage. Generally, a mimetic is used in place of the sugar or sugar-internucleoside linkage combination, and the nucleobase is maintained for hybridization to a selected target.

"Nucleotide" means a nucleoside having a phosphate group covalently linked to the sugar portion of the nucleoside.

"Oligomeric compound" means a polymer of linked monomeric subunits which is capable of hybridizing to at least a region of a nucleic acid molecule.

"Oligonucleoside" means an oligonucleotide in which the internucleoside linkages do not contain a phosphorus atom.

"Oligonucleotide" means a polymer of linked nucleosides each of which can be modified or unmodified, independent one from another.

"Phosphorothioate linkage" means a linkage between nucleosides where the phosphodiester bond is modified by replacing one of the non-bridging oxygen atoms with a sulfur atom. A phosphorothioate linkage is a modified internucleoside linkage. "Portion" means a defined number of contiguous (i.e., linked) nucleobases of a nucleic acid. In certain embodiments, a portion is a defined number of contiguous nucleobases of a target nucleic acid. In certain embodiments, a portion is a defined number of contiguous nucleobases of an antisense compound

"Prevent" refers to delaying or forestalling the onset or development of a disease, disorder, or condition for a period of time from minutes to indefinitely. Prevent also means reducing risk of developing a disease, disorder, or condition. It will be understood that the term "prevent" includes, but does not require, complete prevention. Prevent can also refer to delaying or forestalling the onset or development of symptoms that typically appear in adulthood as a result of an inherited gene mutation.

"Preventing Kennedy's Disease" refers to performing actions that delay or forestall the onset or development of symptoms in a subject that typically appear in adulthood as a result of the subject having an inherited AR gene mutation associated with Kennedy's Disease. Prevention of Kennedy's Disease includes, but is not limited to, preventing muscle strength loss, preventing muscle atrophy, and/or preventing muscle denervation in a subject having an inherited AR gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion.

"Region" is defined as a portion of the target nucleic acid having at least one identifiable structure, function, or characteristic.

"Ribonucleotide" means a nucleotide having a hydroxy at the 2' position of the sugar portion of the nucleotide. Ribonucleotides may be modified with any of a variety of substituents.

"Segments" are defined as smaller or sub-portions of regions within a target nucleic acid.

"Sites," as used herein, are defined as unique nucleobase positions within a target nucleic acid.

"Specifically hybridizable" refers to an antisense compound having a sufficient degree of complementarity between an antisense oligonucleotide and a target nucleic acid to induce a desired effect, while exhibiting minimal or no effects on non-target nucleic acids under conditions in which specific binding is desired, i.e., under physiological conditions in the case of in vivo assays and therapeutic treatments. "Stringent hybridization conditions" or "stringent conditions" refer to conditions under which an oligomeric compound will hybridize to its target sequence, but to a minimal number of other sequences.

"Subject" means a human or non- human animal selected for treatment or therapy.

"Symptom(s)" of Kennedy's Disease include, but are not limited to, any one or more of the following: bulbar signs, such as difficult breathing, swallowing, or talking; dysphagia; intention tremor; hand tremors; lower motor neuropathy; muscle weakness and/or atrophy; muscle denervation; numbness or loss of sensation; decreased deep tendon reflexes; muscular fasciculations (e.g. unintentional muscle twitching); muscle cramps; muscle spasms; hypertrophied calf muscles; gynecomastia (enlarged breasts); effeminate effect of androgen deficiency; impotence; erectile dysfunction; reduced fertility; testicular atrophy; muscle asymmetry; and/or elevated serum creatine kinase.

"Target" refers to a protein, the modulation of which is desired.

"Target gene" refers to a gene encoding a target.

"Targeting" means the process of design and selection of an antisense compound that will specifically hybridize to a target nucleic acid and induce a desired effect.

"Target nucleic acid," "target RNA," "target RNA transcript" and "nucleic acid target" all mean a nucleic acid capable of being targeted by antisense compounds.

"Target region" means a portion of a target nucleic acid to which one or more antisense compounds is targeted.

"Target segment" means the sequence of nucleotides of a target nucleic acid to which an antisense compound is targeted. "5' target site" refers to the 5 '-most nucleotide of a target segment. "3' target site" refers to the 3 '-most nucleotide of a target segment.

"Therapeutically effective amount" means an amount of an agent that provides a therapeutic benefit to an individual.

"Treating Kennedy's Disease" refers to performing actions that lead to amelioration of Kennedy's Disease or of the symptoms accompanied therewith. The combination of said actions is encompassed by the term "treatment." Amelioration of Kennedy's Disease includes, but is not limited to, increasing muscle strength, improving muscle atrophy, and/or inhibiting muscle denervation in a subject having Kennedy's Disease.

"Unmodified" nucleobases mean the purine bases adenine (A) and guanine (G), and the pyrimidine bases thymine (T), cytosine (C) and uracil (U).

"Unmodified nucleotide" means a nucleotide composed of naturally occuring nucleobases, sugar moieties, and internucleoside linkages. In certain embodiments, an unmodified nucleotide is an RNA nucleotide (i.e. β-D-ribonucleosides) or a DNA nucleotide (i.e. β-D-deoxyribonucleoside).

Certain Embodiments

Treating Kennedy's Disease Certain embodiments provided herein relate to ameliorating or treating Kennedy's Disease in a subject by administering an antisense compound targeted to Androgen Receptor. For example, several embodiments are drawn to increasing muscle strength, improving muscle atrophy, and/or inhibiting muscle denervation in a subject having Kennedy's Disease by administering an antisense compound targeted to Androgen Receptor. A subject suffering from Kennedy's Disease can be identified and confirmed by molecular diagnostic techniques available in the art, such as PCR-based assays for detecting CAG repeat expansions in the androgen receptor gene from a blood sample. The subject can have, for example, an expansion of about 36-62 trinucleotide repeats.

In certain embodiments, a method of ameliorating or treating Kennedy's Disease in a subject comprises administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR), thereby ameliorating or treating Kennedy's Disease in the subject.

In certain embodiments, a method of increasing muscle strength in a subject having Kennedy's Disease comprises administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR), thereby increasing muscle strength and ameliorating or treating Kennedy's Disease in the subject. In several aspects, the muscle is a proximal limb muscle (e.g. arms and legs) or bulbar muscle (e.g. mouth, tongue, and throat).

In certain embodiments, a method of improving muscle atrophy in a subject having Kennedy's Disease comprises administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR), thereby improving muscle atrophy and ameliorating or treating Kennedy's Disease in the subject. In several aspects, improving muscle atrophy increases muscle cell size. In several aspects, the muscle is a proximal limb muscle (e.g. arms and legs) or bulbar muscle (e.g. mouth, tongue, and throat).

In certain embodiments, a method of inhibiting muscle denervation in a subject having Kennedy's Disease comprises administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR), thereby inhibiting muscle denervation and ameliorating or treating Kennedy's Disease in the subject. In several aspects, the muscle is a proximal limb muscle (e.g. arms and legs) or bulbar muscle (e.g. mouth, tongue, and throat).

In certain embodiments, a method of inhibiting AR expression in a subject having Kennedy's Disease comprises administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR), thereby ameliorating or treating Kennedy's Disease in the subject. In certain embodiments, the modified oligonucleotide consists of 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 or 35 linked nucleosides. In certain embodiments, the modified oligonucleotide consists of 21 linked nucleosides. In certain embodiments, the modified oligonucleotide consists of 20 linked nucleosides. In certain embodiments, the modified oligonucleotide consists of 19 linked nucleosides. In certain embodiments, the modified oligonucleotide consists of 18 linked nucleosides. In certain embodiments, the modified oligonucleotide consists of 17 linked nucleosides. In certain embodiments, the modified oligonucleotide consists of 16 linked nucleosides.

In certain embodiments, at least one internucleoside linkage of the modified oligonucleotide is a modified internucleoside linkage. In certain embodiments, each internucleoside linkage is a phosphorothioate internucleoside linkage.

In certain embodiments, at least one nucleoside of said modified oligonucleotide comprises a modified nucleobase. In certain embodiments, the modified nucleobase is a 5-methylcytosine.

In certain embodiments, the modified oligonucleotide comprises: a) a gap segment consisting of linked deoxynucleosides; b) a 5' wing segment consisting of linked nucleosides; and c) a 3' wing segment consisting of linked nucleosides. The gap segment is positioned between the 5' wing segment and the 3' wing segment and each nucleoside of each wing segment comprises a modified sugar.

In certain embodiments, the modified oligonucleotide consists of 16 linked nucleosides, a gap segment consisting of 10 linked deoxynucleosides, a 5' wing segment consisting of three linked nucleosides, a 3' wing segment consisting of three linked nucleosides, each nucleoside of each wing segment comprises a constrained ethyl (cEt) sugar, each internucleoside linkage is a phosphorothioate linkage and each cytosine is a 5-methylcytosine.

In certain embodiments, the modified oligonucleotide consists of 16 linked nucleosides, a gap segment consisting of 9 linked deoxynucleosides, a 5' wing segment consisting of three linked nucleosides, a 3' wing segment consisting of four linked nucleosides; the three linked nucleosides of the 5' wing segment are each a constrained ethyl (cEt) sugar; the four linked nucleosides of the 3' wing segment are a constrained ethyl (cEt) sugar, a constrained ethyl (cEt) sugar, a constrained ethyl (cEt) sugar, and a 2'-0-methoxyethyl sugar in the 5' to 3' direction; each internucleoside linkage is a phosphorothioate linkage; and each cytosine is a 5-methylcytosine.

In certain embodiments, the modified oligonucleotide consists of 16 linked nucleosides, a gap segment consisting of 8 linked deoxynucleosides, a 5' wing segment consisting of five linked nucleosides, a 3' wing segment consisting of three linked nucleosides; the five linked nucleosides of the 5' wing segment are each a constrained ethyl (cEt) sugar; the three linked nucleosides of the 3' wing segment are each a constrained ethyl (cEt) sugar; each internucleoside linkage is a phosphorothioate linkage; and each cytosine is a 5-methylcytosine.

In certain embodiments, the modified oligonucleotide consists of 16 linked nucleosides, a gap segment consisting of 8 linked deoxynucleosides, a 5' wing segment consisting of four linked nucleosides, a 3' wing segment consisting of four linked nucleosides; the four linked nucleosides of the 5' wing segment are a 2'-0-methoxyethyl sugar, a constrained ethyl (cEt) sugar, a constrained ethyl (cEt) sugar, and a constrained ethyl (cEt) sugar in the 5' to 3' direction; the four linked nucleosides of the 3' wing segment are a constrained ethyl (cEt) sugar, a constrained ethyl (cEt) sugar, a constrained ethyl (cEt) sugar, and a 2'-0-methoxyethyl sugar in the 5' to 3' direction; each internucleoside linkage is a phosphorothioate linkage; and each cytosine is a 5-methylcytosine.

In certain embodiments, the modified oligonucleotide consists of 16 linked nucleosides, a gap segment consisting of 8 linked deoxynucleosides, a 5' wing segment consisting of five linked nucleosides, a 3' wing segment consisting of three linked nucleosides; the five linked nucleosides of the 5' wing segment are a 2'-0-methoxyethyl sugar, a 2'-0-methoxyethyl sugar, a constrained ethyl (cEt) sugar, a constrained ethyl (cEt) sugar, and a constrained ethyl (cEt) sugar in the 5' to 3' direction; the three linked nucleosides of the 3' wing segment are each a constrained ethyl (cEt) sugar; each internucleoside linkage is a phosphorothioate linkage; and each cytosine is a 5-methylcytosine.

In certain embodiments, the modified oligonucleotide consists of 16 linked nucleosides, a gap segment consisting of 7 linked deoxynucleosides, a 5' wing segment consisting of seven linked nucleosides, a 3' wing segment consisting of two linked nucleosides; the seven linked nucleosides of the 5' wing segment are a 2'-0-methoxyethyl sugar, a constrained ethyl (cEt) sugar, a constrained ethyl (cEt) sugar, a 2'-0-methoxyethyl sugar, a 2'-0-methoxyethyl sugar, a constrained ethyl (cEt) sugar, and a constrained ethyl (cEt) sugar in the 5' to 3' direction; the two linked nucleosides of the 3' wing segment are each a constrained ethyl (cEt) sugar; each internucleoside linkage is a phosphorothioate linkage; and each cytosine is a 5-methylcytosine.

In certain embodiments, the modified oligonucleotide consists of 16 linked nucleosides, a gap segment consisting of 7 linked deoxynucleosides, a 5' wing segment consisting of six linked nucleosides, a 3' wing segment consisting of three linked nucleosides; the six linked nucleosides of the 5' wing segment are a 2'-0-methoxyethyl sugar, a constrained ethyl (cEt) sugar, a constrained ethyl (cEt) sugar, a 2'-0-methoxyethyl sugar, a constrained ethyl (cEt) sugar, and a constrained ethyl (cEt) sugar in the 5' to 3' direction; the three linked nucleosides of the 3' wing segment are each a constrained ethyl (cEt) sugar; each internucleoside linkage is a phosphorothioate linkage; and each cytosine is a 5-methylcytosine. Certain embodiments provide a method of reducing AR expression in a subject having Kennedy's Disease or an AR gene mutation associated with Kennedy's Disease comprising administering to the subject a compound as described herein. In certain embodiments, the compound comprises a modified oligonucleotide 12 to 30 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 15 to 30 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 18 to 21 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 17 to 35 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 17 to 25 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 17 to 24 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 17 to 23 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 17 to 22 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 17 to 21 linked nucleosides in length targeted to AR.

Certain embodiments provide a method for treating a subject with Kennedy's Disease comprising: a) identifying said subject with Kennedy's Disease, and b) administering to said subject a therapeutically effective amount of a compound comprising a modified oligonucleotide consisting of 12 to 30 linked nucleosides and having a nucleobase sequence at least 90% complementary to any of SEQ ID NOs: 1-8 as measured over the entirety of said modified oligonucleotide. In certain embodiments, the therapeutically effective amount of the compound administered to the subject treats or reduces Kennedy's Disease, or a symptom thereof, in the subject.

Certain embodiments provide a method for treating a subject with Kennedy's Disease comprising: a) identifying said subject with Kennedy's Disease, and b) administering to said subject a therapeutically effective amount of a compound comprising a modified oligonucleotide consisting of 12 to 30 linked nucleosides and having a nucleobase sequence 100% complementary to any of SEQ ID NOs: 1-8 as measured over the entirety of said modified oligonucleotide. In certain embodiments, the therapeutically effective amount of the compound administered to the subject treats or reduces Kennedy's Disease, or a symptom thereof, in the subject.

Certain embodiments are drawn to a method of ameliorating or treating a subject with Kennedy's Disease comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) upstream of the 3' end of exon 3 and/or upstream of the ligand binding domain. In certain embodiments, an antisense compound provided herein targets AR within exon 1 encoding the N-terminal domain or exons 2 and 3 encoding the DNA binding domain, but not within exons 4-8 encoding the ligand binding domain. In certain embodiments, an antisense compound provided herein targets AR within exon 1, for example within nucleotide regions 2863-5593 (exon 1) or 27672- 27853 (exon IB) of SEQ ID NO: 1. In certain aspects, an antisense compound provided herein targeted to exon 1 of AR is complementary within any of the following nucleotide regions of SEQ ID NO: 1 : 2957-2972, 3079-3094, 3099-3114, 3109-3124, 3113-3128, 3120-3135, 3133-3148, 3224-3239, 3226- 3241, 3351-3366, 3353-3368, 3361-3376, 3388-3403, 3513-3528, 3517-3532, 3519-3534, 3641-3656, 3735-3750, 3764-3779, 3768-3783, 3798-3813, 3799-3814, 3851-3866, 3870-3885, 3874-3889, 3876- 3891, 3878-3893, 3884-3899, 3886-3901, 3888-3903, 3901-3916, 3956-3971, 3962-3977, 3964-3979, 3967-3982, 4019-4034, 4038-4053, 4049-4064, 4056-4071, 4059-4074, 4062-4077, 4066-4081, 4070- 4085, 4101-4116, 4103-4118, 4105-4120, 4109-4124, 4305-4320, 4405-4420, 4532-4547, 4534-4549, 4537-4552, 4539-4554, 4555-4570, 4571-4586, 4573-4588, 4578-4593, 4597-4612, 4632-4647, 4655- 4670, 4656-4671, 4662-4677, 4699-4714, 4747-4762, 4750-4765, 4752-4767, 4754-4769, 4755-4770, 4769-4784, 4798-4813, 4804-4819, 4807-4822, 4833-4848, 4837-4852, 4839-4854, 4865-4880, 4868- 4883, 4872-4887, 4874-4889, 4876-4891, 4887-4902, 4889-4904, 4916-4931, 4918-4933, 4938-4953, 4942-4957, 4944-4959, 4951-4966, 5050-5065, 5054-5069, 5056-5071, 5060-5075, 5061-5076, 5062- 5077, 5133-5148, 5141-5156, 5155-5170, 5265-5280, 5293-5308, 5308-5323, 5392-5407, 5448-5463, 5469-5484, 5481-5496, 5483-5498, 5486-5501, 5488-5503, 5494-5509, or 5521-5536.

In several aspects, the compound targeted to human androgen receptor (AR) within exon 1 is capable of inhibiting AR to a greater extent than an antisense compound targeted to the ligand binding domain, such as EZN-4176, which is targeted to exon 4 and corresponds to SEQ ID NO: 58 described in US 7,737,125.

Certain embodiments are drawn to a method of ameliorating or treating a subject with Kennedy's Disease comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within intron 1. In certain embodiments, an antisense compound provided herein targets AR within intron 1, for example within nucleotide regions 5594-27671 or 27854-102086 of SEQ ID NO: 1. In certain aspects, an antisense compound provided herein targeted to intron 1 of AR is complementary within any of the following nucleotide regions of SEQ ID NO: 1 : 5666-5681, 6222-6237, 6701-6716, 7543-7558, 8471-8486, 9464-9479, 10217-10232, 10250-10265, 10865-10880, 11855-11870, 13189-13204, 13321-13336, 13346-13361, 13405-13420, 16555-16570, 16793-16808, 16968-16983, 17206-17221, 18865-18880, 29329-29344, 32290-32305, 33315-33330, 39055-39070, 42017-42032, 56050-56065, 58722-58737, 58723-58738, 58724-58739, 58725-58740, 58752-58767, 58753-58768, 58754-58769, 58755-58770, 60902-60917, or 67454-67469. In several aspects, the compound targeted to human androgen receptor (AR) within intron 1 is capable of inhibiting AR to a greater extent than an antisense compound targeted to the ligand binding domain, such as EZN-4176, which is targeted to exon 4 and corresponds to SEQ ID NO: 58 described in US 7,737,125.

Certain embodiments are drawn to a method of ameliorating or treating a subject with Kennedy's

Disease comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within exon 2. In certain embodiments, an antisense compound provided herein targets AR within exon 2, for example within nucleotide regions 102087-102238 (exon 2) or 139551-139834 (exon 2c) of SEQ ID NO: 1. In certain aspects, an antisense compound provided herein targeted to exon 2 of AR is complementary within any of the following nucleotide regions of SEQ ID NO: 1 : 102156-102171, 139682-139697, 139762-139777, or 139782-139797.

Certain embodiments are drawn to a method of ameliorating or treating a subject with Kennedy's Disease comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within intron 2. In certain embodiments, an antisense compound provided herein targets AR within intron 2, for example within nucleotide regions 102239- 139550 or 139835-144840 of SEQ ID NO: 1. In certain aspects, an antisense compound provided herein targeted to intron 2 of AR is complementary within any of the following nucleotide regions of SEQ ID NO: 1 : 114874-114889, 115365-115380, or 134971-134986.

Certain embodiments are drawn to a method of ameliorating or treating a subject with Kennedy's Disease comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within exon 3. In certain embodiments, an antisense compound provided herein targets AR within exon 3, for example within nucleotide regions 144841-144957 (exon 3), 148380-148594 (exon 3b), or 153504-154908 (exon 3d) of SEQ ID NO: 1. In certain aspects, an antisense compound provided herein targeted to exon 3 of AR is complementary within any of the following nucleotide regions of SEQ ID NO: 1 : 144856-144871, 144938-144953, 148406-148421, 148443-148458, or 148520-148535.

Certain embodiments are drawn to a method of ameliorating or treating a subject with Kennedy's Disease comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within exon 7. In certain embodiments, an antisense compound provided herein targets AR within exon 7, for example within nucleotide region 181658-181815 of SEQ ID NO: 1. In certain aspects, an antisense compound provided herein targeted to exon 7 of AR is complementary within nucleotide region 181695-181710 of SEQ ID NO: 1. Certain embodiments are drawn to a method of ameliorating or treating a subject with Kennedy's Disease comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within exon 8. In certain embodiments, an antisense compound provided herein targets AR within exon 8, for example within nucleotide region 182517-189455 of SEQ ID NO: 1. In certain aspects, an antisense compound provided herein targeted to exon 8 of AR is complementary within nucleotide regions 182958-182973 or 183049-183064 of SEQ ID NO: 1.

Certain embodiments are drawn to a method of ameliorating or treating a subject with Kennedy's Disease comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within the exon 1 and exon 2 junction. In certain aspects, an antisense compound provided herein targeted to the exon 1 and exon 2 junction of AR is complementary within nucleotide region 2721-2736 of SEQ ID NO: 2.

Certain embodiments are drawn to a method of ameliorating or treating a subject with Kennedy's Disease comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within the exon 2 and exon 3 junction. In certain aspects, an antisense compound provided herein targeted to the exon 2 and exon 3 junction of AR is complementary within nucleotide regions 2870-2885 or 2721-2736 of SEQ ID NO: 2.

In certain embodiments a method of ameliorating or treating Kennedy's Disease in a subject comprises administering to the subject an antisense compound or modified oligonucleotide targeted to AR, with the proviso that the antisense compound does not have a nucleobase sequence consisting of any of SEQ ID NOs: 174-231, described in US 7,737,125 as SEQ ID NOs: 2-80 & 86-106 (herein incorporated by reference) and identified in Table A.

Table A

182 ACCAAGTTTCTTCAGC

183 CTTGGCCCACTTGACC

184 TCCTGGAGTTGACATT

185 CACTGGCTGTACATCC

186 CATCCAAACTCTTGAG

187 GCTTTCATGCACAGGA

188 GAAGTTCATCAAAGAA

189 AGTTCCTTGATGTAGT

190 TTGCACAGAGATGATC

191 GATGGGCTTGACTTTC

192 CAGGCAGAAGACATCT

193 CCCAAGGCACTGCAGA

194 GCTGACATTCATAGCC

195 TGGGGAGAACCATCCTCACCCTGC

196 TCCAGGACCAGGTAGCCTGTGGGG

197 TGTTCCCCTGGACTCAGATGCTCC

198 TGGGGCACAAGGAGTGGGACGCAC

199 TTCGGCTGTGAAGAGAGTGTGCCA

200 CGCTTTTGACACAAGTGGGACTGG

201 CATAGTGACACCCAGAAGCTTCAT

202 GAGTCATCCCTGCTTCATAACATT

203 GATTACCAAGTTTCTTCAGCTTCC

204 AGGCCTTGGCCCACTTGACCACGT

205 AGCATCCTGGAGTTGACATTGGTG

206 GACACACTGGCTGTACATCCGGGA

207 GAGCCATCCAAACTCTTGAGAGAG

208 CAGTGCTTTCATGCACAGGAATTC

209 ATTCGAAGTTCATCAAAGAATTTT

210 ATCGAGTTCCTTGATGTAGTTCAT

211 GCACTTGCACAGAGATGATCTCTG 212 AATAGATGGGCTTGACTTTCCCAG

213 ATAACAGGCAGAAGACATCTGAAA

214 ATTCCCCAAGGCACTGCAGAGGAG

215 ATGGGCTGACATTCATAGCCTTCA

216 CTGTGAAGAGAGTG

217 TGTGAAGAGAGT

218 TTGACACAAGTGGG

219 TGACACAAGTGG

220 TGACACCCAGAAGC

221 GACACCCAGAAG

222 CCAAGTTTCTTCAG

223 CAAGTTTCTTCA

224 ACTGGCTGTACATC

225 CTGGCTGTACAT

226 GTTCCTTGATGTAG

227 TTCCTTGATGTA

228 ATGGGCTTGACTTT

229 TGGGCTTGACTT

230 CCAAGGCACTGCAG

231 CAAGGCACTGCA

In certain embodiments a method of ameliorating or treating Kennedy's Disease in a subject comprises administering to the subject a compound comprising a modified oligonucleotide consisting of 12 to 30 linked nucleosides and having a nucleobase sequence comprising a nucleobase sequence recited in any of SEQ ID NOs: 12-170 and 174-175. In certain aspects, the antisense compound is capable of inhibiting AR to a greater extent than an antisense compound having a nucleobase sequence consisting of any of SEQ ID NOs: 174-231, described in US 7,737,125 as SEQ ID NOs: 2-80 & 86-106 (herein incorporated by reference) and identified in Table A above.

In certain embodiments a method of ameliorating or treating Kennedy's Disease in a subject comprises administering to the subject a compound comprising a modified oligonucleotide consisting of 12 to 30 linked nucleosides and having a nucleobase sequence consisting of a nucleobase sequence recited in any of SEQ ID NOs: 12-170 and 174-175. In certain aspects, the antisense compound is capable of inhibiting AR to a greater extent than an antisense compound having a nucleobase sequence consisting of any of SEQ ID NOs: 174-231, described in US 7,737,125 as SEQ ID NOs: 2-80 & 86-106 (herein incorporated by reference) and identified in Table A above.

In certain embodiments a method of ameliorating or treating Kennedy's Disease in a subject comprises administering to the subject an antisense compound or modified oligonucleotide targeted to a region of an Androgen Receptor nucleic acid. In certain embodiments, such compounds or oligonucleotides targeted to a region of an Androgen Receptor nucleic acid have a contiguous nucleobase portion that is complementary to an equal length nucleobase portion of the region. For example, the portion can be at least an 8, 9, 10, 11, 12, 13, 14, 15, or 16 contiguous nucleobases portion complementary to an equal length portion of a region recited herein. In certain embodiments, such compounds or oligonucleotide target the following nucleotide regions of SEQ ID NO: 1 : 2957-2972, 3079-3094, 3099-3114, 3109-3124, 3113-3128, 3120-3135, 3133-3148, 3224-3239, 3226-3241, 3351- 3366, 3353-3368, 3361-3376, 3388-3403, 3513-3528, 3517-3532, 3519-3534, 3641-3656, 3735-3750, 3764-3779, 3768-3783, 3798-3813, 3799-3814, 3851-3866, 3870-3885, 3874-3889, 3876-3891, 3878- 3893, 3884-3899, 3886-3901, 3888-3903, 3901-3916, 3956-3971, 3962-3977, 3964-3979, 3967-3982, 4019-4034, 4038-4053, 4049-4064, 4056-4071, 4059-4074, 4062-4077, 4066-4081, 4070-4085, 4101- 4116, 4103-4118, 4105-4120, 4109-4124, 4305-4320, 4405-4420, 4532-4547, 4534-4549, 4537-4552, 4539-4554, 4555-4570, 4571-4586, 4573-4588, 4578-4593, 4597-4612, 4632-4647, 4655-4670, 4656- 4671, 4662-4677, 4699-4714, 4747-4762, 4750-4765, 4752-4767, 4754-4769, 4755-4770, 4769-4784, 4798-4813, 4804-4819, 4807-4822, 4833-4848, 4837-4852, 4839-4854, 4865-4880, 4868-4883, 4872- 4887, 4874-4889, 4876-4891, 4887-4902, 4889-4904, 4916-4931, 4918-4933, 4938-4953, 4942-4957, 4944-4959, 4951-4966, 5061-5076, 5062-5077, 5133-5148, 5141-5156, 5155-5170, 5265-5280, 5293- 5308, 5308-5323, 5392-5407, 5448-5463, 5469-5484, 5481-5496, 5483-5498, 5486-5501, 5488-5503, 5494-5509, 5521-5536, 5666-5681, 6222-6237, 6701-6716, 7543-7558, 8471-8486, 9464-9479, 10217- 10232, 10250-10265, 10865-10880, 11855-11870, 13189-13204, 13321-13336, 13346-13361, 13405- 13420, 16555-16570, 16793-16808, 16968-16983, 17206-17221, 18865-18880, 29329-29344, 32290- 32305, 33315-33330, 39055-39070, 42017-42032, 56050-56065, 60902-60917, 67454-67469, 102156- 102171, 114874-114889, 115365-115380, 134971-134986, 139682-139697, 139762-139777, 139782- 139797, 144856-144871, 144938-144953, 148406-148421, 148443-148458, 148520-148535, 181695- 181710, 182958-182973, or 183049-183064. In certain embodiments a method of ameliorating or treating Kennedy's Disease in a subject comprises administering to the subject an antisense compound or modified oligonucleotide targeted to a Androgen Receptor nucleic acid, wherein the antisense compound or modified oligonucleotide is at least 90% complementary within the following nucleotide regions of SEQ ID NO: 1 : 2957-2972, 3079-3094, 3099-3114, 3109-3124, 3113-3128, 3120-3135, 3133-3148, 3224-3239, 3226-3241, 3351-3366, 3353- 3368, 3361-3376, 3388-3403, 3513-3528, 3517-3532, 3519-3534, 3641-3656, 3735-3750, 3764-3779, 3768-3783, 3798-3813, 3799-3814, 3851-3866, 3870-3885, 3874-3889, 3876-3891, 3878-3893, 3884- 3899, 3886-3901, 3888-3903, 3901-3916, 3956-3971, 3962-3977, 3964-3979, 3967-3982, 4019-4034, 4038-4053, 4049-4064, 4056-4071, 4059-4074, 4062-4077, 4066-4081, 4070-4085, 4101-4116, 4103- 4118, 4105-4120, 4109-4124, 4305-4320, 4405-4420, 4532-4547, 4534-4549, 4537-4552, 4539-4554, 4555-4570, 4571-4586, 4573-4588, 4578-4593, 4597-4612, 4632-4647, 4655-4670, 4656-4671, 4662- 4677, 4699-4714, 4747-4762, 4750-4765, 4752-4767, 4754-4769, 4755-4770, 4769-4784, 4798-4813, 4804-4819, 4807-4822, 4833-4848, 4837-4852, 4839-4854, 4865-4880, 4868-4883, 4872-4887, 4874- 4889, 4876-4891, 4887-4902, 4889-4904, 4916-4931, 4918-4933, 4938-4953, 4942-4957, 4944-4959, 4951-4966, 5050-5065, 5054-5069, 5056-5071, 5060-5075, 5061-5076, 5062-5077, 5133-5148, 5141- 5156, 5155-5170, 5265-5280, 5293-5308, 5308-5323, 5392-5407, 5448-5463, 5469-5484, 5481-5496, 5483-5498, 5486-5501, 5488-5503, 5494-5509, 5521-5536, 5666-5681, 6222-6237, 6701-6716, 7543- 7558, 8471-8486, 9464-9479, 10217-10232, 10250-10265, 10865-10880, 11855-11870, 13189-13204, 13321-13336, 13346-13361, 13405-13420, 16555-16570, 16793-16808, 16968-16983, 17206-17221, 18865-18880, 29329-29344, 32290-32305, 33315-33330, 39055-39070, 42017-42032, 56050-56065, 58723-58738, 58724-58739, 58725-58740, 58752-58767, 58753-58768, 58754-58769, 58755-58770, 60902-60917, 67454-67469, 102156-102171, 114874-114889, 115365-115380, 134971-134986, 139682- 139697, 139762-139777, 139782-139797, 144856-144871, 144938-144953, 148406-148421, 148443- 148458, 148520-148535, 181695-181710, 182958-182973, or 183049-183064.

In certain embodiments a method of ameliorating or treating Kennedy's Disease in a subject comprises administering to the subject an antisense compound or modified oligonucleotide targeted to a Androgen Receptor nucleic acid, wherein the antisense compound or modified oligonucleotide is 100% complementary within the following nucleotide regions of SEQ ID NO: 1 : 2957-2972, 3079-3094, 3099- 3114, 3109-3124, 3113-3128, 3120-3135, 3133-3148, 3224-3239, 3226-3241, 3351-3366, 3353-3368, 3361-3376, 3388-3403, 3513-3528, 3517-3532, 3519-3534, 3641-3656, 3735-3750, 3764-3779, 3768- 3783, 3798-3813, 3799-3814, 3851-3866, 3870-3885, 3874-3889, 3876-3891, 3878-3893, 3884-3899, 3886-3901, 3888-3903, 3901-3916, 3956-3971, 3962-3977, 3964-3979, 3967-3982, 4019-4034, 4038- 4053, 4049-4064, 4056-4071, 4059-4074, 4062-4077, 4066-4081, 4070-4085, 4101-4116, 4103-4118, 4105-4120, 4109-4124, 4305-4320, 4405-4420, 4532-4547, 4534-4549, 4537-4552, 4539-4554, 4555- 4570, 4571-4586, 4573-4588, 4578-4593, 4597-4612, 4632-4647, 4655-4670, 4656-4671, 4662-4677, 4699-4714, 4747-4762, 4750-4765, 4752-4767, 4754-4769, 4755-4770, 4769-4784, 4798-4813, 4804- 4819, 4807-4822, 4833-4848, 4837-4852, 4839-4854, 4865-4880, 4868-4883, 4872-4887, 4874-4889, 4876-4891, 4887-4902, 4889-4904, 4916-4931, 4918-4933, 4938-4953, 4942-4957, 4944-4959, 4951- 4966, 5050-5065, 5054-5069, 5056-5071, 5060-5075, 5061-5076, 5062-5077, 5133-5148, 5141-5156, 5155-5170, 5265-5280, 5293-5308, 5308-5323, 5392-5407, 5448-5463, 5469-5484, 5481-5496, 5483- 5498, 5486-5501, 5488-5503, 5494-5509, 5521-5536, 5666-5681, 6222-6237, 6701-6716, 7543-7558, 8471-8486, 9464-9479, 10217-10232, 10250-10265, 10865-10880, 11855-11870, 13189-13204, 13321- 13336, 13346-13361, 13405-13420, 16555-16570, 16793-16808, 16968-16983, 17206-17221, 18865- 18880, 29329-29344, 32290-32305, 33315-33330, 39055-39070, 42017-42032, 56050-56065, 58722- 58737, 58723-58738, 58724-58739, 58725-58740, 58752-58767, 58753-58768, 58754-58769, 58755- 58770, 60902-60917, 67454-67469, 102156-102171, 114874-114889, 115365-115380, 134971-134986, 139682-139697, 139762-139777, 139782-139797, 144856-144871, 144938-144953, 148406-148421, 148443-148458, 148520-148535, 181695-181710, 182958-182973, or 183049-183064.

Certain embodiments provide the use of a compound as described herein in the manufacture of a medicament for ameliorating or treating Kennedy's Disease in a subject. Certain embodiments provide the use of a compound as described herein in the manufacture of a medicament for increasing muscle strength, improving muscle atrophy, and/or inhibiting muscle denervation in a subject having Kennedy's Disease. Certain embodiments relate to use of a compound described herein for ameliorating or treating Kennedy's Disease in a subject. Certain embodiments relate to use of a compound described herein for increasing muscle strength, improving muscle atrophy, and/or inhibiting muscle denervation in a subject having Kennedy's Disease. In several aspects, the muscle is a proximal limb muscle (e.g. arms and legs) or bulbar muscle (e.g. mouth, tongue, and throat).

Preventing Kennedy's Disease

Certain embodiments provided herein relate to preventing Kennedy's Disease in a subject having an AR gene mutation associated with Kennedy's Disease by administering an antisense compound targeted to Androgen Receptor. Although Kennedy's Disease typically develops in middle adult life, several embodiments are drawn to preventing the onset or severity of Kennedy's Disease in males who carry an AR gene mutation for Kennedy's Disease but are presently in the presymptomatic stage. Several embodiments are drawn to administering an antisense compound targeted to Androgen Receptor to a subject carrying an AR gene mutation for Kennedy's Disease prior to onset of the disease or its associated symptoms, thereby preventing Kennedy's Disease in the subject. These subjects can have a family history of Kennedy's Disease and can be confirmed as carriers of the Kennedy's Disease AR gene mutation by molecular diagnostic techniques available in the art, such as PCR-based assays for detecting CAG repeat expansions in the androgen receptor gene from a blood sample. Several embodiments are drawn to preventing muscle strength loss, preventing muscle atrophy, and/or preventing muscle denervation in a subject in a subject having an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease by administering an antisense compound targeted to Androgen Receptor. In certain embodiments, the muscle is a proximal limb muscle (e.g. arms and legs) or bulbar muscle (e.g. mouth, tongue, and throat). In several aspects, the subject has an AR gene mutation characterized by an expansion of a CAG trinucleotide repeat known to be genetically associated with Kennedy's Disease. The subject can have, for example, an expansion of about 36-62 trinucleotide repeats.

In certain embodiments, a method of preventing Kennedy's Disease in a subject carrying an

Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprises administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor, thereby preventing Kennedy's Disease or at least one symptom of Kennedy's Disease in the subject. In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

In certain embodiments, a method of preventing muscle strength loss in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprises administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR), thereby preventing muscle strength loss in the subject. In several aspects, the muscle is a proximal limb muscle (e.g. arms and legs) or bulbar muscle (e.g. mouth, tongue, and throat). In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

In certain embodiments, a method of preventing muscle atrophy in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprises administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR), thereby preventing muscle atrophy in the subject. In several aspects, preventing muscle atrophy prevents reduction of muscle cell size. In several aspects, the muscle is a proximal limb muscle (e.g. arms and legs) or bulbar muscle (e.g. mouth, tongue, and throat). In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

In certain embodiments, a method of preventing muscle denervation in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprises administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR), thereby preventing muscle denervation in the subject. In several aspects, the muscle is a proximal limb muscle (e.g. arms and legs) or bulbar muscle (e.g. mouth, tongue, and throat). In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

In certain embodiments, a method of inhibiting AR expression in a subject carrying an Androgen

Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprises administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR), thereby inhibiting AR expression in the subject and preventing Kennedy's Disease or at least one symptom of Kennedy's Disease in the subject. In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

In certain embodiments, the modified oligonucleotide consists of 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 or 35 linked nucleosides. In certain embodiments, the modified oligonucleotide consists of 21 linked nucleosides. In certain embodiments, the modified oligonucleotide consists of 20 linked nucleosides. In certain embodiments, the modified oligonucleotide consists of 19 linked nucleosides. In certain embodiments, the modified oligonucleotide consists of 18 linked nucleosides. In certain embodiments, the modified oligonucleotide consists of 17 linked nucleosides. In certain embodiments, the modified oligonucleotide consists of 16 linked nucleosides.

In certain embodiments, the modified oligonucleotide consists of 16 linked nucleosides, a gap segment consisting of 7 linked deoxynucleosides, a 5' wing segment consisting of six linked nucleosides, a 3' wing segment consisting of three linked nucleosides; the six linked nucleosides of the 5' wing segment are a 2'-0-methoxyethyl sugar, a constrained ethyl (cEt) sugar, a constrained ethyl (cEt) sugar, a 2'-0-methoxyethyl sugar, a constrained ethyl (cEt) sugar, and a constrained ethyl (cEt) sugar in the 5' to 3' direction; the three linked nucleosides of the 3' wing segment are each a constrained ethyl (cEt) sugar; each internucleoside linkage is a phosphorothioate linkage; and each cytosine is a 5-methylcytosine.

Certain embodiments provide a method of reducing AR expression in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprising administering to the subject a compound as described herein. In certain embodiments, the compound comprises a modified oligonucleotide 12 to 30 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 15 to 30 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 18 to 21 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 17 to 35 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 17 to 25 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 17 to 24 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 17 to 23 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 17 to 22 linked nucleosides in length targeted to AR. In certain embodiments, the compound comprises a modified oligonucleotide 17 to 21 linked nucleosides in length targeted to AR. In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

Certain embodiments provide a method for preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprising: a) identifying said subject as carrying the AR gene mutation, and b) administering to said subject a therapeutically effective amount of a compound comprising a modified oligonucleotide consisting of 12 to 30 linked nucleosides and having a nucleobase sequence at least 90% complementary to any of SEQ ID NOs: 1-8 as measured over the entirety of said modified oligonucleotide. In certain embodiments, the therapeutically effective amount of the compound administered to the subject prevents Kennedy's Disease, or a symptom thereof, in the subject. In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

Certain embodiments provide a method for preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprising: a) identifying said subject as carrying the AR gene mutation, and b) administering to said subject a therapeutically effective amount of a compound comprising a modified oligonucleotide consisting of 12 to 30 linked nucleosides and having a nucleobase sequence 100% complementary to any of SEQ ID NOs: 1-8 as measured over the entirety of said modified oligonucleotide. In certain embodiments, the therapeutically effective amount of the compound administered to the subject prevents Kennedy's Disease, or a symptom thereof, in the subject. In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

Certain embodiments are drawn to a method of preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) upstream of the 3' end of exon 3 and/or upstream of the ligand binding domain. In certain embodiments, an antisense compound provided herein targets AR within exon 1 encoding the N-terminal domain or exons 2 and 3 encoding the DNA binding domain, but not within exons 4-8 encoding the ligand binding domain. In certain embodiments, an antisense compound provided herein targets AR within exon 1. In certain embodiments, an antisense compound provided herein targets AR within exon 1, for example within nucleotide regions 2863-5593 (exon 1) or 27672-27853 (exon IB) of SEQ ID NO: 1. In certain aspects, an antisense compound provided herein targeted to exon 1 of AR is complementary within any of the following nucleotide regions of SEQ ID NO: 1 : 2957-2972, 3079-3094, 3099-3114, 3109-3124, 3113-3128, 3120-3135, 3133- 3148, 3224-3239, 3226-3241, 3351-3366, 3353-3368, 3361-3376, 3388-3403, 3513-3528, 3517-3532, 3519-3534, 3641-3656, 3735-3750, 3764-3779, 3768-3783, 3798-3813, 3799-3814, 3851-3866, 3870- 3885, 3874-3889, 3876-3891, 3878-3893, 3884-3899, 3886-3901, 3888-3903, 3901-3916, 3956-3971, 3962-3977, 3964-3979, 3967-3982, 4019-4034, 4038-4053, 4049-4064, 4056-4071, 4059-4074, 4062- 4077, 4066-4081, 4070-4085, 4101-4116, 4103-4118, 4105-4120, 4109-4124, 4305-4320, 4405-4420, 4532-4547, 4534-4549, 4537-4552, 4539-4554, 4555-4570, 4571-4586, 4573-4588, 4578-4593, 4597- 4612, 4632-4647, 4655-4670, 4656-4671, 4662-4677, 4699-4714, 4747-4762, 4750-4765, 4752-4767, 4754-4769, 4755-4770, 4769-4784, 4798-4813, 4804-4819, 4807-4822, 4833-4848, 4837-4852, 4839- 4854, 4865-4880, 4868-4883, 4872-4887, 4874-4889, 4876-4891, 4887-4902, 4889-4904, 4916-4931, 4918-4933, 4938-4953, 4942-4957, 4944-4959, 4951-4966, 5050-5065, 5054-5069, 5056-5071, 5060- 5075, 5061-5076, 5062-5077, 5133-5148, 5141-5156, 5155-5170, 5265-5280, 5293-5308, 5308-5323, 5392-5407, 5448-5463, 5469-5484, 5481-5496, 5483-5498, 5486-5501, 5488-5503, 5494-5509, or 5521- 5536.

In several aspects, the compound targeted to human androgen receptor (AR) within exon 1 is capable of inhibiting AR to a greater extent than an antisense compound targeted to the ligand binding domain, such as EZN-4176, which is targeted to exon 4 and corresponds to SEQ ID NO: 58 described in US 7,737,125. In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

Certain embodiments embodiments are drawn to a method of preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within intron 1. In certain embodiments, an antisense compound provided herein targets AR within intron 1, for example within nucleotide regions 5594-27671 or 27854-102086 of SEQ ID NO: 1. In certain aspects, an antisense compound provided herein targeted to intron 1 of AR is complementary within any of the following nucleotide regions of SEQ ID NO: 1 : 5666-5681, 6222-6237, 6701-6716, 7543-7558, 8471-8486, 9464- 9479, 10217-10232, 10250-10265, 10865-10880, 11855-11870, 13189-13204, 13321-13336, 13346- 13361, 13405-13420, 16555-16570, 16793-16808, 16968-16983, 17206-17221, 18865-18880, 29329- 29344, 32290-32305, 33315-33330, 39055-39070, 42017-42032, 56050-56065, 58722-58737, 58723- 58738, 58724-58739, 58725-58740, 58752-58767, 58753-58768, 58754-58769, 58755-58770, 60902- 60917, or 67454-67469.

In several aspects, the compound targeted to human androgen receptor (AR) within intron 1 is capable of inhibiting AR to a greater extent than an antisense compound targeted to the ligand binding domain, such as EZN-4176, which is targeted to exon 4 and corresponds to SEQ ID NO: 58 described in US 7,737,125. In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

Certain embodiments are drawn to a method of preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within exon 2. In certain embodiments, an antisense compound provided herein targets AR within exon 2, for example within nucleotide regions 102087-102238 (exon 2) or 139551-139834 (exon 2c) of SEQ ID NO: 1. In certain aspects, an antisense compound provided herein targeted to exon 2 of AR is complementary within any of the following nucleotide regions of SEQ ID NO: 1 : 102156-102171, 139682-139697, 139762-139777, or 139782-139797.

Certain embodiments are drawn to a method of preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within intron 2. In certain embodiments, an antisense compound provided herein targets AR within intron 2, for example within nucleotide regions 102239-139550 or 139835-144840 of SEQ ID NO: 1. In certain aspects, an antisense compound provided herein targeted to intron 2 of AR is complementary within any of the following nucleotide regions of SEQ ID NO: 1 : 114874-114889, 115365-115380, or 134971-134986.

Certain embodiments are drawn to a method of preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within exon 3. . In certain embodiments, an antisense compound provided herein targets AR within exon 3, for example within nucleotide regions 144841-144957 (exon 3), 148380-148594 (exon 3b), or 153504-154908 (exon 3d) of SEQ ID NO: 1. In certain aspects, an antisense compound provided herein targeted to exon 3 of AR is complementary within any of the following nucleotide regions of SEQ ID NO: 1 : 144856-144871, 144938-144953, 148406-148421, 148443-148458, or 148520-148535.

Certain embodiments are drawn to a method of preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within exon 7. In certain embodiments, an antisense compound provided herein targets AR within exon 7, for example within nucleotide region 181658-181815 of SEQ ID NO: 1. In certain aspects, an antisense compound provided herein targeted to exon 7 of AR is complementary within nucleotide region 181695-181710 of SEQ ID NO: 1. Certain embodiments are drawn to a method preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within exon 8. In certain embodiments, an antisense compound provided herein targets AR within exon 8, for example within nucleotide region 182517-189455 of SEQ ID NO: 1. In certain aspects, an antisense compound provided herein targeted to exon 8 of AR is complementary within nucleotide regions 182958-182973 or 183049- 183064 of SEQ ID NO: 1.

Certain embodiments are drawn to a method of preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within the exon 1 and exon 2 junction. In certain aspects, an antisense compound provided herein targeted to the exon 1 and exon 2 junction of AR is complementary within nucleotide region 2721-2736 of SEQ ID NO: 2.

Certain embodiments are drawn to a method preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprising administering to the subject an antisense compound or modified oligonucleotide targeted to human androgen receptor (AR) within the exon 2 and exon 3 junction. In certain aspects, an antisense compound provided herein targeted to the exon 2 and exon 3 junction of AR is complementary within nucleotide regions 2870-2885 or 2721-2736 of SEQ ID NO: 2.

In certain embodiments a method of treating Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprises administering to the subject an antisense compound or modified oligonucleotide targeted to AR, with the proviso that the antisense compound does not have a nucleobase sequence consisting of any of SEQ ID NOs: 174-231, described in US 7,737,125 as SEQ ID NOs: 2-80 & 86-106 (herein incorporated by reference) and identified in Table A above. In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

In certain embodiments a method of preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprises administering to the subject a compound comprising a modified oligonucleotide consisting of 12 to 30 linked nucleosides and having a nucleobase sequence comprising a nucleobase sequence recited in any of SEQ ID NOs: 12-170 and 174-175. In certain aspects, the antisense compound is capable of inhibiting AR to a greater extent than an antisense compound having a nucleobase sequence consisting of any of SEQ ID NOs: 174-231, described in US 7,737,125 and identified in Table A above. In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

In certain embodiments a method of preventing Kennedy's Disease in a subject carrying an

Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprises administering to the subject a compound comprising a modified oligonucleotide consisting of 12 to 30 linked nucleosides and having a nucleobase sequence consisting of a nucleobase sequence recited in any of SEQ ID NOs: 12-170 and 174-175. In certain aspects, the antisense compound is capable of inhibiting AR to a greater extent than an antisense compound having a nucleobase sequence consisting of any of SEQ ID NOs: 174-231, described in US 7,737,125 and identified in Table A above. In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

In certain embodiments a method of preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprises administering to the subject an antisense compound or modified oligonucleotide targeted to a region of an Androgen Receptor nucleic acid. In certain embodiments, such compounds or oligonucleotides targeted to a region of an Androgen Receptor nucleic acid have a contiguous nucleobase portion that is complementary to an equal length nucleobase portion of the region. For example, the portion can be at least an 8, 9, 10, 11, 12, 13, 14, 15, or 16 contiguous nucleobases portion complementary to an equal length portion of a region recited herein. In certain embodiments, such compounds or oligonucleotide target the following nucleotide regions of SEQ ID NO: 1 : 2957-2972, 3079-3094, 3099-3114, 3109-3124, 3113-3128, 3120-3135, 3133-3148, 3224-3239, 3226-3241, 3351- 3366, 3353-3368, 3361-3376, 3388-3403, 3513-3528, 3517-3532, 3519-3534, 3641-3656, 3735-3750, 3764-3779, 3768-3783, 3798-3813, 3799-3814, 3851-3866, 3870-3885, 3874-3889, 3876-3891, 3878- 3893, 3884-3899, 3886-3901, 3888-3903, 3901-3916, 3956-3971, 3962-3977, 3964-3979, 3967-3982, 4019-4034, 4038-4053, 4049-4064, 4056-4071, 4059-4074, 4062-4077, 4066-4081, 4070-4085, 4101- 4116, 4103-4118, 4105-4120, 4109-4124, 4305-4320, 4405-4420, 4532-4547, 4534-4549, 4537-4552, 4539-4554, 4555-4570, 4571-4586, 4573-4588, 4578-4593, 4597-4612, 4632-4647, 4655-4670, 4656- 4671, 4662-4677, 4699-4714, 4747-4762, 4750-4765, 4752-4767, 4754-4769, 4755-4770, 4769-4784, 4798-4813, 4804-4819, 4807-4822, 4833-4848, 4837-4852, 4839-4854, 4865-4880, 4868-4883, 4872- 4887, 4874-4889, 4876-4891, 4887-4902, 4889-4904, 4916-4931, 4918-4933, 4938-4953, 4942-4957, 4944-4959, 4951-4966, 5061-5076, 5062-5077, 5133-5148, 5141-5156, 5155-5170, 5265-5280, 5293- 5308, 5308-5323, 5392-5407, 5448-5463, 5469-5484, 5481-5496, 5483-5498, 5486-5501, 5488-5503, 5494-5509, 5521-5536, 5666-5681, 6222-6237, 6701-6716, 7543-7558, 8471-8486, 9464-9479, 10217- 10232, 10250-10265, 10865-10880, 11855-11870, 13189-13204, 13321-13336, 13346-13361, 13405- 13420, 16555-16570, 16793-16808, 16968-16983, 17206-17221, 18865-18880, 29329-29344, 32290- 32305, 33315-33330, 39055-39070, 42017-42032, 56050-56065, 60902-60917, 67454-67469, 102156- 102171, 114874-114889, 115365-115380, 134971-134986, 139682-139697, 139762-139777, 139782- 139797, 144856-144871, 144938-144953, 148406-148421, 148443-148458, 148520-148535, 181695- 181710, 182958-182973, or 183049-183064. In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprises administering to the subject an antisense compound or modified oligonucleotide targeted to a Androgen Receptor nucleic acid, wherein the antisense compound or modified oligonucleotide is at least 90% complementary within the following nucleotide regions of SEQ ID NO: 1 : 2957-2972, 3079-3094, 3099-3114, 3109-3124, 3113-3128, 3120-3135, 3133-3148, 3224- 3239, 3226-3241, 3351-3366, 3353-3368, 3361-3376, 3388-3403, 3513-3528, 3517-3532, 3519-3534, 3641-3656, 3735-3750, 3764-3779, 3768-3783, 3798-3813, 3799-3814, 3851-3866, 3870-3885, 3874- 3889, 3876-3891, 3878-3893, 3884-3899, 3886-3901, 3888-3903, 3901-3916, 3956-3971, 3962-3977, 3964-3979, 3967-3982, 4019-4034, 4038-4053, 4049-4064, 4056-4071, 4059-4074, 4062-4077, 4066- 4081, 4070-4085, 4101-4116, 4103-4118, 4105-4120, 4109-4124, 4305-4320, 4405-4420, 4532-4547, 4534-4549, 4537-4552, 4539-4554, 4555-4570, 4571-4586, 4573-4588, 4578-4593, 4597-4612, 4632- 4647, 4655-4670, 4656-4671, 4662-4677, 4699-4714, 4747-4762, 4750-4765, 4752-4767, 4754-4769, 4755-4770, 4769-4784, 4798-4813, 4804-4819, 4807-4822, 4833-4848, 4837-4852, 4839-4854, 4865- 4880, 4868-4883, 4872-4887, 4874-4889, 4876-4891, 4887-4902, 4889-4904, 4916-4931, 4918-4933, 4938-4953, 4942-4957, 4944-4959, 4951-4966, 5050-5065, 5054-5069, 5056-5071, 5060-5075, 5061- 5076, 5062-5077, 5133-5148, 5141-5156, 5155-5170, 5265-5280, 5293-5308, 5308-5323, 5392-5407, 5448-5463, 5469-5484, 5481-5496, 5483-5498, 5486-5501, 5488-5503, 5494-5509, 5521-5536, 5666- 5681, 6222-6237, 6701-6716, 7543-7558, 8471-8486, 9464-9479, 10217-10232, 10250-10265, 10865- 10880, 11855-11870, 13189-13204, 13321-13336, 13346-13361, 13405-13420, 16555-16570, 16793- 16808, 16968-16983, 17206-17221, 18865-18880, 29329-29344, 32290-32305, 33315-33330, 39055- 39070, 42017-42032, 56050-56065, 58723-58738, 58724-58739, 58725-58740, 58752-58767, 58753- 58768, 58754-58769, 58755-58770, 60902-60917, 67454-67469, 102156-102171, 114874-114889, 115365-115380, 134971-134986, 139682-139697, 139762-139777, 139782-139797, 144856-144871, 144938-144953, 148406-148421, 148443-148458, 148520-148535, 181695-181710, 182958-182973, or 183049-183064. In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

In certain embodiments a method of preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion, comprises administering to the subject an antisense compound or modified oligonucleotide targeted to a Androgen Receptor nucleic acid, wherein the antisense compound or modified oligonucleotide is 100% complementary within the following nucleotide regions of SEQ ID NO: 1 : 2957-2972, 3079-3094, 3099-3114, 3109-3124, 3113-3128, 3120-3135, 3133-3148, 3224-3239, 3226-3241, 3351-3366, 3353-3368, 3361-3376, 3388-3403, 3513-3528, 3517-3532, 3519-3534, 3641- 3656, 3735-3750, 3764-3779, 3768-3783, 3798-3813, 3799-3814, 3851-3866, 3870-3885, 3874-3889, 3876-3891, 3878-3893, 3884-3899, 3886-3901, 3888-3903, 3901-3916, 3956-3971, 3962-3977, 3964- 3979, 3967-3982, 4019-4034, 4038-4053, 4049-4064, 4056-4071, 4059-4074, 4062-4077, 4066-4081, 4070-4085, 4101-4116, 4103-4118, 4105-4120, 4109-4124, 4305-4320, 4405-4420, 4532-4547, 4534- 4549, 4537-4552, 4539-4554, 4555-4570, 4571-4586, 4573-4588, 4578-4593, 4597-4612, 4632-4647, 4655-4670, 4656-4671, 4662-4677, 4699-4714, 4747-4762, 4750-4765, 4752-4767, 4754-4769, 4755- 4770, 4769-4784, 4798-4813, 4804-4819, 4807-4822, 4833-4848, 4837-4852, 4839-4854, 4865-4880, 4868-4883, 4872-4887, 4874-4889, 4876-4891, 4887-4902, 4889-4904, 4916-4931, 4918-4933, 4938- 4953, 4942-4957, 4944-4959, 4951-4966, 5050-5065, 5054-5069, 5056-5071, 5060-5075, 5061-5076, 5062-5077, 5133-5148, 5141-5156, 5155-5170, 5265-5280, 5293-5308, 5308-5323, 5392-5407, 5448- 5463, 5469-5484, 5481-5496, 5483-5498, 5486-5501, 5488-5503, 5494-5509, 5521-5536, 5666-5681, 6222-6237, 6701-6716, 7543-7558, 8471-8486, 9464-9479, 10217-10232, 10250-10265, 10865-10880, 11855-11870, 13189-13204, 13321-13336, 13346-13361, 13405-13420, 16555-16570, 16793-16808, 16968-16983, 17206-17221, 18865-18880, 29329-29344, 32290-32305, 33315-33330, 39055-39070, 42017-42032, 56050-56065, 58722-58737, 58723-58738, 58724-58739, 58725-58740, 58752-58767, 58753-58768, 58754-58769, 58755-58770, 60902-60917, 67454-67469, 102156-102171, 114874- 114889, 115365-115380, 134971-134986, 139682-139697, 139762-139777, 139782-139797, 144856- 144871, 144938-144953, 148406-148421, 148443-148458, 148520-148535, 181695-181710, 182958- 182973, or 183049-183064. In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage.

Certain embodiments provide the use of a compound as described herein in the manufacture of a medicament for preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion. Certain embodiments provide the use of a compound as described herein in the manufacture of a medicament for preventing muscle strength loss, preventing muscle atrophy, and/or preventing muscle denervation in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion. Certain embodiments relate to use of a compound described herein for preventing Kennedy's Disease in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion. Certain embodiments relate to use of a compound described herein for preventing muscle strength loss, preventing muscle atrophy, and/or preventing muscle denervation in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease, such as a CAG trinucleotide repeat expansion. In several aspects, the subject carries a mutation in the AR gene associated with Kennedy's Disease but is in the presymptomatic or early symptomatic stage. In several aspects, the muscle is a proximal limb muscle (e.g. arms and legs) or bulbar muscle (e.g. mouth, tongue, and throat).

Antisense compounds

Oligomeric compounds include, but are not limited to, oligonucleotides, oligonucleosides, oligonucleotide analogs, oligonucleotide mimetics, antisense compounds, antisense oligonucleotides, and siR As. An oligomeric compound may be "antisense" to a target nucleic acid, meaning that is is capable of undergoing hybridization to a target nucleic acid through hydrogen bonding.

In certain embodiments, an antisense compound has a nucleobase sequence that, when written in the 5' to 3' direction, comprises the reverse complement of the target segment of a target nucleic acid to which it is targeted. In certain such embodiments, an antisense oligonucleotide has a nucleobase sequence that, when written in the 5' to 3' direction, comprises the reverse complement of the target segment of a target nucleic acid to which it is targeted.

In certain embodiments, an antisense compound is 10-30 subunits in length. In certain embodiments, an antisense compound is 12 to 30 subunits in length. In certain embodiments, an antisense compound is 12 to 22 subunits in length. In certain embodiments, an antisense compound is 14 to 30 subunits in length. In certain embodiments, an antisense compound is 14 to 20 subunits in length. In certain embodiments, an antisense compoun is 15 to 30 subunits in length. In certain embodiments, an antisense compound is 15 to 20 subunits in length. In certain embodiments, an antisense compound is 16 to 30 subunits in length. In certain embodiments, an antisense compound is 16 to 20 subunits in length. In certain embodiments, an antisense compound is 17 to 30 subunits in length. In certain embodiments, an antisense compound is 17 to 20 subunits in length. In certain embodiments, an antisense compound is 18 to 30 subunits in length. In certain embodiments, an antisense compound is 18 to 21 subunits in length. In certain embodiments, an antisense compound is 18 to 20 subunits in length. In certain embodiments, an antisense compound is 20 to 30 subunits in length. In other words, such antisense compounds are from 12 to 30 linked subunits, 14 to 30 linked subunits, 14 to 20 subunits, 15 to 30 subunits, 15 to 20 subunits, 16 to 30 subunits, 16 to 20 subunits, 17 to 30 subunits, 17 to 20 subunits, 18 to 30 subunits, 18 to 20 subunits, 18 to 21 subunits, 20 to 30 subunits, or 12 to 22 linked subunits, respectively. In certain embodiments, an antisense compound is 14 subunits in length. In certain embodiments, an antisense compound is 16 subunits in length. In certain embodiments, an antisense compound is 17 subunits in length. In certain embodiments, an antisense compound is 18 subunits in length. In certain embodiments, an antisense compound is 20 subunits in length. In other embodiments, the antisense compound is 8 to 80, 12 to 50, 13 to 30, 13 to 50, 14 to 30, 14 to 50, 15 to 30, 15 to 50, 16 to 30, 16 to 50, 17 to 30, 17 to 50, 18 to 22, 18 to 24, 18 to 30, 18 to 50, 19 to 22, 19 to 30, 19 to 50, or 20 to 30 linked subunits. In certain such embodiments, the antisense compounds are 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, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, or 80 linked subunits in length, or a range defined by any two of the above values. In some embodiments the antisense compound is an antisense oligonucleotide, and the linked subunits are nucleotides.

In certain embodiments antisense oligonucleotides may be shortened or truncated. For example, a single subunit may be deleted from the 5' end (5' truncation), or alternatively from the 3' end (3' truncation). A shortened or truncated antisense compound targeted to an Androgen Receptor nucleic acid may have two subunits deleted from the 5' end, or alternatively may have two subunits deleted from the 3 ' end, of the antisense compound. Alternatively, the deleted nucleosides may be dispersed throughout the antisense compound, for example, in an antisense compound having one nucleoside deleted from the 5' end and one nucleoside deleted from the 3' end.

When a single additional subunit is present in a lengthened antisense compound, the additional subunit may be located at the 5' or 3' end of the antisense compound. When two or more additional subunits are present, the added subunits may be adjacent to each other, for example, in an antisense compound having two subunits added to the 5' end (5' addition), or alternatively to the 3' end (3' addition), of the antisense compound. Alternatively, the added subunits may be dispersed throughout the antisense compound, for example, in an antisense compound having one subunit added to the 5' end and one subunit added to the 3' end.

It is possible to increase or decrease the length of an antisense compound, such as an antisense oligonucleotide, and/or introduce mismatch bases without eliminating activity. For example, in Woolf et al. (Proc. Natl. Acad. Sci. USA 89:7305-7309, 1992), a series of antisense oligonucleotides 13-25 nucleobases in length were tested for their ability to induce cleavage of a target RNA in an oocyte injection model. Antisense oligonucleotides 25 nucleobases in length with 8 or 11 mismatch bases near the ends of the antisense oligonucleotides were able to direct specific cleavage of the target mRNA, albeit to a lesser extent than the antisense oligonucleotides that contained no mismatches. Similarly, target specific cleavage was achieved using 13 nucleobase antisense oligonucleotides, including those with 1 or 3 mismatches.

Gautschi et al. (J. Natl. Cancer Inst. 93:463-471, March 2001) demonstrated the ability of an oligonucleotide having 100% complementarity to the bcl-2 mRNA and having 3 mismatches to the bcl- xL mRNA to reduce the expression of both bcl-2 and bcl-xL in vitro and in vivo. Furthermore, this oligonucleotide demonstrated potent anti-tumor activity in vivo.

Maher and Dolnick Nuc. Acid. Res. 16:3341-3358,1988) tested a series of tandem 14 nucleobase antisense oligonucleotides, and a 28 and 42 nucleobase antisense oligonucleotides comprised of the sequence of two or three of the tandem antisense oligonucleotides, respectively, for their ability to arrest translation of human DHFR in a rabbit reticulocyte assay. Each of the three 14 nucleobase antisense oligonucleotides alone was able to inhibit translation, albeit at a more modest level than the 28 or 42 nucleobase antisense oligonucleotides.

Certain Antisense Compound Motifs and Mechanisms

In certain embodiments, antisense compounds have chemically modified subunits arranged in patterns, or motifs, to confer to the antisense compounds properties such as enhanced inhibitory activity, increased binding affinity for a target nucleic acid, or resistance to degradation by in vivo nucleases.

Chimeric antisense compounds typically contain at least one region modified so as to confer increased resistance to nuclease degradation, increased cellular uptake, increased binding affinity for the target nucleic acid, and/or increased inhibitory activity. A second region of a chimeric antisense compound may confer another desired property e.g., serve as a substrate for the cellular endonuclease RNase H, which cleaves the RNA strand of an RNA:DNA duplex.

Antisense activity may result from any mechanism involving the hybridization of the antisense compound (e.g., oligonucleotide) with a target nucleic acid, wherein the hybridization ultimately results in a biological effect. In certain embodiments, the amount and/or activity of the target nucleic acid is modulated. In certain embodiments, the amount and/or activity of the target nucleic acid is reduced. In certain embodiments, hybridization of the antisense compound to the target nucleic acid ultimately results in target nucleic acid degradation. In certain embodiments, hybridization of the antisense compound to the target nucleic acid does not result in target nucleic acid degradation. In certain such embodiments, the presence of the antisense compound hybridized with the target nucleic acid (occupancy) results in a modulation of antisense activity. In certain embodiments, antisense compounds having a particular chemical motif or pattern of chemical modifications are particularly suited to exploit one or more mechanisms. In certain embodiments, antisense compounds function through more than one mechanism and/or through mechanisms that have not been elucidated. Accordingly, the antisense compounds described herein are not limited by particular mechanism.

Antisense mechanisms include, without limitation, RNase H mediated antisense; RNAi mechanisms, which utilize the RISC pathway and include, without limitation, siRNA, ssRNA and microRNA mechanisms; and occupancy based mechanisms. Certain antisense compounds may act through more than one such mechanism and/or through additional mechanisms.

RNase H-Mediated Antisense

In certain embodiments, antisense activity results at least in part from degradation of target RNA by RNase H. RNase H is a cellular endonuclease that cleaves the RNA strand of an RNA:DNA duplex. It is known in the art that single-stranded antisense compounds which are "DNA-like" elicit RNase H activity in mammalian cells. Accordingly, antisense compounds comprising at least a portion of DNA or DNA-like nucleosides may activate RNase H, resulting in cleavage of the target nucleic acid. In certain embodiments, antisense compounds that utilize RNase H comprise one or more modified nucleosides. In certain embodiments, such antisense compounds comprise at least one block of 1-8 modified nucleosides. In certain such embodiments, the modified nucleosides do not support RNase H activity. In certain embodiments, such antisense compounds are gapmers, as described herein. In certain such embodiments, the gap of the gapmer comprises DNA nucleosides. In certain such embodiments, the gap of the gapmer comprises DNA-like nucleosides. In certain such embodiments, the gap of the gapmer comprises DNA nucleosides and DNA-like nucleosides.

Certain antisense compounds having a gapmer motif are considered chimeric antisense compounds. In a gapmer an internal region having a plurality of nucleotides that supports RNaseH cleavage is positioned between external regions having a plurality of nucleotides that are chemically distinct from the nucleosides of the internal region. In the case of an antisense oligonucleotide having a gapmer motif, the gap segment generally serves as the substrate for endonuclease cleavage, while the wing segments comprise modified nucleosides. In certain embodiments, the regions of a gapmer are differentiated by the types of sugar moieties comprising each distinct region. The types of sugar moieties that are used to differentiate the regions of a gapmer may in some embodiments include β-D- ribonucleosides, β-D-deoxyribonucleosides, 2'-modified nucleosides (such 2'-modified nucleosides may include 2'-MOE and 2'-0-CH₃, among others), and bicyclic sugar modified nucleosides (such bicyclic sugar modified nucleosides may include those having a constrained ethyl). In certain embodiments, nucleosides in the wings may include several modified sugar moieties, including, for example 2'-MOE and bicyclic sugar moieties such as constrained ethyl or LNA. In certain embodiments, wings may include several modified and unmodified sugar moieties. In certain embodiments, wings may include various combinations of 2'-MOE nucleosides, bicyclic sugar moieties such as constrained ethyl nucleosides or LNA nucleosides, and 2'-deoxynucleosides.

Each distinct region may comprise uniform sugar moieties, variant, or alternating sugar moieties. The wing-gap-wing motif is frequently described as "X-Y-Z", where "X" represents the length of the 5 '-wing, "Y" represents the length of the gap, and "Z" represents the length of the 3 '-wing. "X" and "Z" may comprise uniform, variant, or alternating sugar moieties. In certain embodiments, "X" and "Y" may include one or more 2'-deoxynucleosides."Y" may comprise 2'-deoxynucleosides. As used herein, a gapmer described as "X-Y-Z" has a configuration such that the gap is positioned immediately adjacent to each of the 5'-wing and the 3' wing. Thus, no intervening nucleotides exist between the 5'- wing and gap, or the gap and the 3 '-wing. Any of the antisense compounds described herein can have a gapmer motif. In certain embodiments, "X" and "Z" are the same; in other embodiments they are different. In certain embodiments, "Y" is between 8 and 15 nucleosides. X, Y, or Z can be any of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 25, 30 or more nucleosides.

In certain embodiments, the antisense compound targeted to an Androgen Receptor nucleic acid has a gapmer motif in which the gap consists of 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, or 16 linked nucleosides.

In certain embodiments, the antisense oligonucleotide has a sugar motif described by Formula A as follows: (J)_m-(B)_n-(J)_p-(B)_r-(A)_t-(D)_g-(A)_v-(B)_w-(J)_x-(B)_y-(J)_z

wherein:

each A is independently a 2'-substituted nucleoside;

each B is independently a bicyclic nucleoside;

each J is independently either a 2'-substituted nucleoside or a 2'-deoxynucleoside;

each D is a 2'-deoxynucleoside;

m is 0-4; n is 0-2; p is 0-2; r is 0-2; t is 0-2; v is 0-2; w is 0-4; x is 0-2; y is 0-2; z is 0-4; g is 6-14; provided that:

at least one of m, n, and r is other than 0; at least one of w and y is other than 0;

the sum of m, n, p, r, and t is from 2 to 5; and

the sum of v, w, x, y, and z is from 2 to 5.

RNAi Compounds

In certain embodiments, antisense compounds are interfering RNA compounds (RNAi), which include double-stranded RNA compounds (also referred to as short-interfering RNA or siRNA) and single-stranded RNAi compounds (or ssRNA). Such compounds work at least in part through the RISC pathway to degrade and/or sequester a target nucleic acid (thus, include microRNA/microRNA-mimic compounds). In certain embodiments, antisense compounds comprise modifications that make them particularly suited for such mechanisms.

i. ssRNA compounds

In certain embodiments, antisense compounds including those particularly suited for use as single-stranded RNAi compounds (ssRNA) comprise a modified 5' -terminal end. In certain such embodiments, the 5 '-terminal end comprises a modified phosphate moiety. In certain embodiments, such modified phosphate is stabilized (e.g., resistant to degradation/cleavage compared to unmodified 5'- phosphate). In certain embodiments, such 5'-terminal nucleosides stabilize the 5 '-phosphorous moiety. Certain modified 5'-terminal nucleosides may be found in the art, for example in WO/2011/139702.

In certain embodiments, the 5'-nucleoside of an ssRNA compound has Formula lie:

lie

wherein:

T_! is an optionally protected phosphorus moiety;

T₂ is an internucleoside linking group linking the compound of Formula lie to the oligomeric compound;

A has one of the formulas:

Qi and Q₂ are each, independently, H, halogen, Ci-C₆ alkyl, substituted Ci-C₆ alkyl, Ci-C₆ alkoxy, substituted Ci-C₆ alkoxy, C₂-C₆ alkenyl, substituted C₂-C₆ alkenyl, C₂-C₆ alkynyl, substituted C₂-C₆ alkynyl or (R₃)(R₄);

Q₃ is O, S, N(R₅) or C(R₆)(R₇);

each R₃, R4 R₅, R₆ and R₇ is, independently, H, Ci-C₅ alkyl, substituted C_rC₆ alkyl or Ci-C₆ alkoxy;

M₃ is O, S, NR₁₄, C(Ri₅)(Ri₆), C(R₁₅)(Ri₆)C(Ri₇)(Ri₈),

OC(Ri₅)(Ri₆) or

OC(R₁₅)(Bx₂);

Ri4 is H, Ci-Ce alkyl, substituted Ci-Ce alkyl, C1-C6 alkoxy, substituted C1-C6 alkoxy, C₂-C6 alkenyl, substituted C₂-C₆ alkenyl, C₂-C₆ alkynyl or substituted C₂-C₆ alkynyl;

Ri5, R_i6, Ri7 and R_i8 are each, independently, H, halogen, C_rC₆ alkyl, substituted C_rC₆ alkyl, C_r C₆ alkoxy, substituted C_rC₆ alkoxy, C₂-C₆ alkenyl, substituted C₂-C₆ alkenyl, C₂-C₆ alkynyl or substituted C₂-C₆ alkynyl;

BX[ is a heterocyclic base moiety;

or if Bx₂ is present then Bx₂ is a heterocyclic base moiety and Bx[ is H, halogen, CL-C₆ alkyl, substituted Ci-C₆ alkyl, Ci-C₆ alkoxy, substituted C C₆ alkoxy, C₂-C₆ alkenyl, substituted C₂-C₆ alkenyl, C₂-C₆ alkynyl or substituted C₂-C₆ alkynyl;

J₄, J₅, J₆ and J₇ are each, independently, H, halogen, Ci-C₆ alkyl, substituted Ci-C₆ alkyl, Ci-C₆ alkoxy, substituted Ci-C₆ alkoxy, C₂-C₆ alkenyl, substituted C₂-C₆ alkenyl, C₂-C₆ alkynyl or substituted C₂-C₅ alkynyl;

or J₄ forms a bridge with one of J₅ or J₇ wherein said bridge comprises from 1 to 3 linked biradical groups selected from 0, S, NR₁₉, C(R₂₀)(R₂i),

C[=C(R₂o)(R₂i)] and C(=0) and the other two of J₅, Je and J₇ are each, independently, H, halogen, Ci-Ce alkyl, substituted Ci-Ce alkyl, Ci- Ce alkoxy, substituted

alkoxy, C₂-C6 alkenyl, substituted C₂-C6 alkenyl, C₂-C6 alkynyl or substituted C₂-C6 alkynyl;

each Rip, R₂₀ and R₂i is, independently, H, Ci-Ce alkyl, substituted Ci-Ce alkyl, C1-C6 alkoxy, substituted C1-C6 alkoxy, C₂-C6 alkenyl, substituted C₂-C6 alkenyl, C₂-C6 alkynyl or substituted C₂-C6 alkynyl; G is H, OH, halogen or 0-[C(R₈)(R₉)]_n-[(C=0)_m-X₁]_j-Z;

each R₈ and R₉ is, independently, H, halogen, Ci-C₆ alkyl or substituted Ci-C₆ alkyl;

Z is H, halogen, Ci-C₆ alkyl, substituted Ci-C₆ alkyl, C₂-C₆ alkenyl, substituted C₂-C₆ alkenyl, C₂- Ce alkynyl, substituted C₂-C6 alkynyl or N(E₂)(E₃);

E_b E₂ and E₃ are each, independently, H, C_rC₆ alkyl or substituted C_rC₆ alkyl;

n is from 1 to about 6;

m is 0 or 1 ;

j is 0 or 1 ;

each substituted group comprises one or more optionally protected substituent groups independently selected from halogen, OI_b N(J (J₂), =NJ_b SJ_b N₃, CN, OC(=X₂)J_b OC(=X₂)N(J₁)(J₂) and C(=X₂)N(J (J₂);

X₂ is O, S or NJ₃;

each J_b J₂ and J₃ is, independently, H or C C₆ alkyl;

when j is 1 then Z is other than halogen or N(E2)(E₃); and

wherein said oligomeric compound comprises from 8 to 40 monomeric subunits and is hybridizable to at least a portion of a target nucleic acid.

In certain embodiments, M₃ is O, CH=CH, OCH₂ or OC(H)(Bx₂). In certain embodiments, M₃ is

O.

In certain embodiments, J₄, J₅, and J₇ are each H. In certain embodiments, J₄ forms a bridge with one of J₅ or J₇.

In certain embodiments, A has one of the formulas:

wherein:

Qi and Q₂ are each, independently, H, halogen, Ci-C₆ alkyl, substituted C_rC₆ alkyl, Ci-C₆ alkoxy or substituted Ci-Ce alkoxy. In certain embodiments, Qi and Q₂ are each H. In certain embodiments, Qi and Q2 are each, independently, H or halogen. In certain embodiments, Qi and Q2 is H and the other of Qi and Q₂ is F, CH₃ or OCH₃.

In certain embodiments, Ti has the formula: Ra

Rc

wherein:

R_a and R_o are each, independently, protected hydroxyl, protected thiol, C1-C6 alkyl, substituted Ci-Ce alkyl, C1-C6 alkoxy, substituted Ci-Ce alkoxy, protected amino or substituted amino; and

R_b is O or S. In certain embodiments, R_b is O and R_a and R_c are each, independently, OCH₃,

In certain embodiments, G is halogen, OCH₃, OCH₂F, OCHF₂, OCF₃, OCH₂CH₃, 0(CH₂)₂F, OCH2CHF2, OCH₂CF₃, OCH₂-CH=CH₂, 0(CH₂)₂-OCH₃, 0(CH₂)₂-SCH₃, 0(CH₂)₂-OCF₃, 0(CH₂)₃- N(R₁₀)(Rn), O(CH₂)₂-ON(R₁₀)(Ri i), O(CH2)2-O(CH₂)₂-N(R₁₀)(Ri i), OCH₂C(=O)-N(R₁₀)(R_u),

OCH₂C(=0)-N(Ri₂)-(CH₂)2-N(Rio)(Ri i) or 0(CH₂)₂-N(R₁₂)-C(= Ri₃)[N(Rio)(Rn)] wherein R₁₀, R_u, R_i2 and R₁₃ are each, independently, H or Ci-C₆ alkyl. In certain embodiments, G is halogen, OCH₃, OCF₃, OCH₂CH₃, OCH₂CF₃, OCH₂-CH=CH₂, 0(CH₂)₂-OCH₃, 0(CH₂)2-0(CH₂)2-N(CH₃)₂, OCH₂C(=0)- N(H)CH₃, OCH₂C(=0)-N(H)-(CH₂)₂-N(CH₃)₂ or OCH₂-N(H)-C(=NH)NH₂. In certain embodiments, G is F, OCH₃ or 0(CH₂)₂-OCH₃. In certain embodiments, G is 0(CH₂)₂-OCH₃.

In certain embodiments, the 5'-terminal nucleoside has Formula He:

He

In certain embodiments, antisense compounds, including those particularly suitable for ssRNA comprise one or more type of modified sugar moieties and/or naturally occurring sugar moieties arranged along an oligonucleotide or region thereof in a defined pattern or sugar modification motif. Such motifs may include any of the sugar modifications discussed herein and/or other known sugar modifications. In certain embodiments, the oligonucleotides comprise or consist of a region having uniform sugar modifications. In certain such embodiments, each nucleoside of the region comprises the same RNA-like sugar modification. In certain embodiments, each nucleoside of the region is a 2'-F nucleoside. In certain embodiments, each nucleoside of the region is a 2'-OMe nucleoside. In certain embodiments, each nucleoside of the region is a 2'-MOE nucleoside. In certain embodiments, each nucleoside of the region is a cEt nucleoside. In certain embodiments, each nucleoside of the region is an LNA nucleoside. In certain embodiments, the uniform region constitutes all or essentially all of the oligonucleotide. In certain embodiments, the region constitutes the entire oligonucleotide except for 1 -4 terminal nucleosides.

In certain embodiments, oligonucleotides comprise one or more regions of alternating sugar modifications, wherein the nucleosides alternate between nucleotides having a sugar modification of a first type and nucleotides having a sugar modification of a second type. In certain embodiments, nucleosides of both types are RNA-like nucleosides. In certain embodiments the alternating nucleosides are selected from: 2'-OMe, 2'-F, 2'-MOE, LNA, and cEt. In certain embodiments, the alternating modificatios are 2'-F and 2'-OMe. Such regions may be contiguous or may be interupted by differently modified nucleosides or conjugated nucleosides.

In certain embodiments, the alternating region of alternating modifications each consist of a single nucleoside (i.e., the patern is (AB)_xA_y wheren A is a nucleoside having a sugar modification of a first type and B is a nucleoside having a sugar modification of a second type; x is 1-20 and y is 0 or 1). In certan embodiments, one or more alternating regions in an alternating motif includes more than a single nucleoside of a type. For example, oligonucleotides may include one or more regions of any of the following nucleoside motifs:

AABBAA;

ABB ABB;

AABAAB;

ABBABAABB;

ABABAA;

AABABAB;

ABABAA;

ABBAABBABABAA;

BABBAABB ABABAA; or ABABBAABBABABAA;

wherein A is a nucleoside of a first type and B is a nucleoside of a second type. In certain embodiments, A and B are each selected from 2'-F, 2'-OMe, BNA, and MOE.

In certain embodiments, oligonucleotides having such an alternating motif also comprise a modified 5' terminal nucleoside, such as those of formula lie or He.

In certain embodiments, oligonucleotides comprise a region having a 2-2-3 motif. Such regions comprises the following motif:

-(A)₂-(B)_x-(A)₂-(C)_y-(A)₃- wherein: A is a first type of modifed nucleosde;

B and C, are nucleosides that are differently modified than A, however, B and C may have the same or different modifications as one another;

x and y are from 1 to 15.

In certain embodiments, A is a 2'-OMe modified nucleoside. In certain embodiments, B and C are both 2'-F modified nucleosides. In certain embodiments, A is a 2'-OMe modified nucleoside and B and C are both 2'-F modified nucleosides.

In certain embodiments, oligonucleosides have the following sugar motif:

5'- (Q)- (AB)_xA_y-(D)_z

wherein:

Q is a nucleoside comprising a stabilized phosphate moiety. In certain embodiments, Q is a nucleoside having Formula lie or He;

A is a first type of modifed nucleoside;

B is a second type of modified nucleoside;

D is a modified nucleoside comprising a modification different from the nucleoside adjacent to it. Thus, if y is 0, then D must be differently modified than B and if y is 1, then D must be differently modified than A. In certain embodiments, D differs from both A and B.

X is 5-15;

Y is O or 1 ;

Z is 0-4. In certain embodiments, oligonucleosides have the following sugar motif:

5'- (Q (A)_X-(D)_Z

wherein:

A is a first type of modifed nucleoside;

D is a modified nucleoside comprising a modification different from A.

X is 11-30;

Z is 0-4.

In certain embodiments A, B, C, and D in the above motifs are selected from: 2'-OMe, 2'-F, 2'- MOE, LNA, and cEt. In certain embodiments, D represents terminal nucleosides. In certain embodiments, such terminal nucleosides are not designed to hybridize to the target nucleic acid (though one or more might hybridize by chance). In certiain embodiments, the nucleobase of each D nucleoside is adenine, regardless of the identity of the nucleobase at the corresponding position of the target nucleic acid. In certain embodiments the nucleobase of each D nucleoside is thymine.

In certain embodiments, antisense compounds, including those particularly suited for use as ssRNA comprise modified intemucleoside linkages arranged along the oligonucleotide or region thereof in a defined pattern or modified intemucleoside linkage motif. In certain embodiments, oligonucleotides comprise a region having an alternating intemucleoside linkage motif. In certain embodiments, oligonucleotides comprise a region of uniformly modified intemucleoside linkages. In certain such embodiments, the oligonucleotide comprises a region that is uniformly linked by phosphorothioate intemucleoside linkages. In certain embodiments, the oligonucleotide is uniformly linked by phosphorothioate intemucleoside linkages. In certain embodiments, each intemucleoside linkage of the oligonucleotide is selected from phosphodiester and phosphorothioate. In certain embodiments, each intemucleoside linkage of the oligonucleotide is selected from phosphodiester and phosphorothioate and at least one intemucleoside linkage is phosphorothioate.

In certain embodiments, the oligonucleotide comprises at least 6 phosphorothioate intemucleoside linkages. In certain embodiments, the oligonucleotide comprises at least 8 phosphorothioate intemucleoside linkages. In certain embodiments, the oligonucleotide comprises at least 10 phosphorothioate intemucleoside linkages. In certain embodiments, the oligonucleotide comprises at least one block of at least 6 consecutive phosphorothioate intemucleoside linkages. In certain embodiments, the oligonucleotide comprises at least one block of at least 8 consecutive phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide comprises at least one block of at least 10 consecutive phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide comprises at least one block of at least one 12 consecutive phosphoro- thioate internucleoside linkages. In certain such embodiments, at least one such block is located at the 3' end of the oligonucleotide. In certain such embodiments, at least one such block is located within 3 nucleosides of the 3' end of the oligonucleotide.

Oligonucleotides having any of the various sugar motifs described herein, may have any linkage motif. For example, the oligonucleotides, including but not limited to those described above, may have a linkage motif selected from non- limiting the table below:

ii. siRNA compounds

In certain embodiments, antisense compounds are double-stranded RNAi compounds (siRNA). In such embodiments, one or both strands may comprise any modification motif described above for ssRNA. In certain embodiments, ssRNA compounds may be unmodified RNA. In certain embodiments, siRNA compounds may comprise unmodified RNA nucleosides, but modified internucleoside linkages.

Several embodiments relate to double-stranded compositions wherein each strand comprises a motif defined by the location of one or more modified or unmodified nucleosides. In certain embodiments, compositions are provided comprising a first and a second oligomeric compound that are fully or at least partially hybridized to form a duplex region and further comprising a region that is complementary to and hybridizes to a nucleic acid target. It is suitable that such a composition comprise a first oligomeric compound that is an antisense strand having full or partial complementarity to a nucleic acid target and a second oligomeric compound that is a sense strand having one or more regions of complementarity to and forming at least one duplex region with the first oligomeric compound. The compositions of several embodiments modulate gene expression by hybridizing to a nucleic acid target resulting in loss of its normal function. In some embodiments, the target nucleic acid is Androgen Receptor. In certain embodiment, the degradation of the targeted Androgen Receptor is facilitated by an activated RISC complex that is formed with compositions of the invention.

Several embodiments are directed to double-stranded compositions wherein one of the strands is useful in, for example, influencing the preferential loading of the opposite strand into the RISC (or cleavage) complex. The compositions are useful for targeting selected nucleic acid molecules and modulating the expression of one or more genes. In some embodiments, the compositions of the present invention hybridize to a portion of a target R A resulting in loss of normal function of the target RNA.

Certain embodiments are drawn to double-stranded compositions wherein both the strands comprises a hemimer motif, a fully modified motif, a positionally modified motif or an alternating motif. Each strand of the compositions of the present invention can be modified to fulfil a particular role in for example the siRNA pathway. Using a different motif in each strand or the same motif with different chemical modifications in each strand permits targeting the antisense strand for the RISC complex while inhibiting the incorporation of the sense strand. Within this model, each strand can be independently modified such that it is enhanced for its particular role. The antisense strand can be modified at the 5'-end to enhance its role in one region of the RISC while the 3'-end can be modified differentially to enhance its role in a different region of the RISC.

The double-stranded oligonucleotide molecules can be a double-stranded polynucleotide molecule comprising self-complementary sense and antisense regions, wherein the antisense region comprises nucleotide sequence that is complementary to nucleotide sequence in a target nucleic acid molecule or a portion thereof and the sense region having nucleotide sequence corresponding to the target nucleic acid sequence or a portion thereof. The double-stranded oligonucleotide molecules can be assembled from two separate oligonucleotides, where one strand is the sense strand and the other is the antisense strand, wherein the antisense and sense strands are self-complementary (i.e. each strand comprises nucleotide sequence that is complementary to nucleotide sequence in the other strand; such as where the antisense strand and sense strand form a duplex or double -stranded structure, for example wherein the double-stranded region is about 15 to about 30, e.g., about 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 or 30 base pairs; the antisense strand comprises nucleotide sequence that is complementary to nucleotide sequence in a target nucleic acid molecule or a portion thereof and the sense strand comprises nucleotide sequence corresponding to the target nucleic acid sequence or a portion thereof (e.g., about 15 to about 25 or more nucleotides of the double-stranded oligonucleotide molecule are complementary to the target nucleic acid or a portion thereof). Alternatively, the double-stranded oligonucleotide is assembled from a single oligonucleotide, where the self-complementary sense and antisense regions of the siRNA are linked by means of a nucleic acid based or non-nucleic acid-based linker(s).

The double-stranded oligonucleotide can be a polynucleotide with a duplex, asymmetric duplex, hairpin or asymmetric hairpin secondary structure, having self-complementary sense and antisense regions, wherein the antisense region comprises nucleotide sequence that is complementary to nucleotide sequence in a separate target nucleic acid molecule or a portion thereof and the sense region having nucleotide sequence corresponding to the target nucleic acid sequence or a portion thereof. The double- stranded oligonucleotide can be a circular single-stranded polynucleotide having two or more loop structures and a stem comprising self-complementary sense and antisense regions, wherein the antisense region comprises nucleotide sequence that is complementary to nucleotide sequence in a target nucleic acid molecule or a portion thereof and the sense region having nucleotide sequence corresponding to the target nucleic acid sequence or a portion thereof, and wherein the circular polynucleotide can be processed either in vivo or in vitro to generate an active siRNA molecule capable of mediating RNAi.

In certain embodiments, the double -stranded oligonucleotide comprises separate sense and antisense sequences or regions, wherein the sense and antisense regions are covalently linked by nucleotide or non-nucleotide linkers molecules as is known in the art, or are alternately non-covalently linked by ionic interactions, hydrogen bonding, van der waals interactions, hydrophobic interactions, and/or stacking interactions. In certain embodiments, the double-stranded oligonucleotide comprises nucleotide sequence that is complementary to nucleotide sequence of a target gene. In another embodiment, the double-stranded oligonucleotide interacts with nucleotide sequence of a target gene in a manner that causes inhibition of expression of the target gene.

As used herein, double-stranded oligonucleotides need not be limited to those molecules containing only RNA, but further encompasses chemically modified nucleotides and non-nucleotides. In certain embodiments, the short interfering nucleic acid molecules lack 2'-hydroxy (2'-OH) containing nucleotides. In certain embodiments short interfering nucleic acids optionally do not include any ribonucleotides (e.g., nucleotides having a 2'-OH group). Such double-stranded oligonucleotides that do not require the presence of ribonucleotides within the molecule to support RNAi can however have an attached linker or linkers or other attached or associated groups, moieties, or chains containing one or more nucleotides with 2'-OH groups. Optionally, double-stranded oligonucleotides can comprise ribonucleotides at about 5, 10, 20, 30, 40, or 50% of the nucleotide positions. As used herein, the term siRNA is meant to be equivalent to other terms used to describe nucleic acid molecules that are capable of mediating sequence specific RNAi, for example short interfering RNA (siRNA), double-stranded RNA (dsRNA), micro-RNA (miRNA), short hairpin RNA (shRNA), short interfering oligonucleotide, short interfering nucleic acid, short interfering modified oligonucleotide, chemically modified siRNA, post- transcriptional gene silencing RNA (ptgsRNA), and others. In addition, as used herein, the term RNAi is meant to be equivalent to other terms used to describe sequence specific RNA interference, such as post transcriptional gene silencing, translational inhibition, or epigenetics. For example, double-stranded oligonucleotides can be used to epigenetically silence genes at both the post-transcriptional level and the pre -transcriptional level. In a non-limiting example, epigenetic regulation of gene expression by siRNA molecules of the invention can result from siRNA mediated modification of chromatin structure or methylation pattern to alter gene expression (see, for example, Verdel et al., 2004, Science, 303, 672-676; Pal-Bhadra et al., 2004, Science, 303, 669-672; Allshire, 2002, Science, 297, 1818-1819; Volpe et al., 2002, Science, 297, 1833-1837; Jenuwein, 2002, Science, 297, 2215-2218; and Hall et al., 2002, Science, 297, 2232-2237).

It is contemplated that compounds and compositions of several embodiments provided herein can target Androgen Receptor by a dsRNA-mediated gene silencing or RNAi mechanism, including, e.g., "hairpin" or stem-loop double- stranded RNA effector molecules in which a single RNA strand with self- complementary sequences is capable of assuming a double-stranded conformation, or duplex dsRNA effector molecules comprising two separate strands of RNA. In various embodiments, the dsRNA consists entirely of ribonucleotides or consists of a mixture of ribonucleotides and deoxynucleotides, such as the RNA/DNA hybrids disclosed, for example, by WO 00/63364, filed Apr. 19, 2000, or U.S. Ser. No. 60/130,377, filed Apr. 21, 1999. The dsRNA or dsRNA effector molecule may be a single molecule with a region of self-complementarity such that nucleotides in one segment of the molecule base pair with nucleotides in another segment of the molecule. In various embodiments, a dsRNA that consists of a single molecule consists entirely of ribonucleotides or includes a region of ribonucleotides that is complementary to a region of deoxyribonucleotides. Alternatively, the dsRNA may include two different strands that have a region of complementarity to each other.

In various embodiments, both strands consist entirely of ribonucleotides, one strand consists entirely of ribonucleotides and one strand consists entirely of deoxyribonucleotides, or one or both strands contain a mixture of ribonucleotides and deoxyribonucleotides. In certain embodiments, the regions of complementarity are at least 70, 80, 90, 95, 98, or 100% complementary to each other and to a target nucleic acid sequence. In certain embodiments, the region of the dsRNA that is present in a double- stranded conformation includes at least 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 50, 75,100, 200, 500, 1000, 2000 or 5000 nucleotides or includes all of the nucleotides in a cDNA or other target nucleic acid sequence being represented in the dsRNA. In some embodiments, the dsRNA does not contain any single stranded regions, such as single stranded ends, or the dsRNA is a hairpin. In other embodiments, the dsRNA has one or more single stranded regions or overhangs. In certain embodiments, RNA/DNA hybrids include a DNA strand or region that is an antisense strand or region (e.g, has at least 70, 80, 90, 95, 98, or 100% complementarity to a target nucleic acid) and an RNA strand or region that is a sense strand or region (e.g, has at least 70, 80, 90, 95, 98, or 100% identity to a target nucleic acid), and vice versa.

In various embodiments, the RNA/DNA hybrid is made in vitro using enzymatic or chemical synthetic methods such as those described herein or those described in WO 00/63364, filed Apr. 19, 2000, or U.S. Ser. No. 60/130,377, filed Apr. 21, 1999. In other embodiments, a DNA strand synthesized in vitro is complexed with an RNA strand made in vivo or in vitro before, after, or concurrent with the transformation of the DNA strand into the cell. In yet other embodiments, the dsRNA is a single circular nucleic acid containing a sense and an antisense region, or the dsRNA includes a circular nucleic acid and either a second circular nucleic acid or a linear nucleic acid (see, for example, WO 00/63364, filed Apr. 19, 2000, or U.S. Ser. No. 60/130,377, filed Apr. 21, 1999.) Exemplary circular nucleic acids include lariat structures in which the free 5' phosphoryl group of a nucleotide becomes linked to the 2' hydroxyl group of another nucleotide in a loop back fashion.

In other embodiments, the dsRNA includes one or more modified nucleotides in which the 2' position in the sugar contains a halogen (such as fluorine group) or contains an alkoxy group (such as a methoxy group) which increases the half-life of the dsRNA in vitro or in vivo compared to the corresponding dsRNA in which the corresponding 2' position contains a hydrogen or an hydroxyl group. In yet other embodiments, the dsRNA includes one or more linkages between adjacent nucleotides other than a naturally-occurring phosphodiester linkage. Examples of such linkages include phosphoramide, phosphorothioate, and phosphorodithioate linkages. The dsRNAs may also be chemically modified nucleic acid molecules as taught in U.S. Pat. No. 6,673,661. In other embodiments, the dsRNA contains one or two capped strands, as disclosed, for example, by WO 00/63364, filed Apr. 19, 2000, or U.S. Ser. No. 60/130,377, filed Apr. 21, 1999.

In other embodiments, the dsRNA can be any of the at least partially dsRNA molecules disclosed in WO 00/63364, as well as any of the dsRNA molecules described in U.S. Provisional Application 60/399,998; and U.S. Provisional Application 60/419,532, and PCT/US2003/033466, the teaching of which is hereby incorporated by reference. Any of the dsRNAs may be expressed in vitro or in vivo using the methods described herein or standard methods, such as those described in WO 00/63364. Occupancy

In certain embodiments, antisense compounds are not expected to result in cleavage or the target nucleic acid via RNase H or to result in cleavage or sequestration through the RISC pathway. In certain such embodiments, antisense activity may result from occupancy, wherein the presence of the hybridized antisense compound disrupts the activity of the target nucleic acid. In certain such embodiments, the antisense compound may be uniformly modified or may comprise a mix of modifications and/or modified and unmodified nucleosides.

Target Nucleic Acids, Target Regions and Nucleotide Sequences

Nucleotide sequences that encode human Androgen Receptor include, without limitation, the following: GENBANK Accession No. NT_011669.17_TRUNC_5079000_5270000 (incorporated herein as SEQ ID NO: 1), GENBANK Accession No. NM 000044.3 (incorporated herein as SEQ ID NO: 2), GENBANK Accession No. NM_001011645.2 (incorporated herein as SEQ ID NO: 3), GENBANK Accession No. FJ235916.1 (incorporated herein as SEQ ID NO: 4), GENBANK Accession No. FJ235917.1 (incorporated herein as SEQ ID NO: 5), GENBANK Accession No. FJ235918.1 (incorporated herein as SEQ ID NO: 6), GENBANK Accession No. FJ235919.1 (incorporated herein as SEQ ID NO: 7), and GENBANK Accession No. FJ235920.1 (incorporated herein as SEQ ID NO: 8). It will be understood that in several embodiments, the nucleobase sequence of any one of SEQ ID NOs: 1-8 can have additional CAG trinucleotide repeats in exon 1. In certain embodiments, compounds provided herein target SEQ ID NOs: 1-8 having about 36-62 CAG trinucleotide repeats in exon 1. For example, in certain embodiments, compounds provided herein target Androgen Receptor having about 36-62 CAG trinucleotide repeats beginning at nucleobase position 1287 (within exon 1) of SEQ ID NO: 2. One can readily determine similar Androgen Receptor sequences having about 36-62 CAG trinucleotide repeats beginning at the corresponding nucleobase position within exon 1 relative to any of SEQ ID NOs: 1 and 3-9, and compounds provided herein can target such Androgen Receptor sequences in several embodiments.

Compounds provided herein targeted to Androgen Receptor, such as any of SEQ ID NOs: 1-8 or an Androgen Receptor sequence having about 36-62 CAG trinucleotide repeats beginning at a nucleobase position corresponding to nucleobase position 1287 (within exon 1) of SEQ ID NO: 2, can be used to ameliorate, treat, or prevent Kennedy's Disease in a subject. In certain embodiments, compounds provided herein target Androgen Receptor pre-mRNA, such as a pre-mRNA having a nucleobase sequence represented by GENBANK Accession No. NT_011669.17_TRUNC_5079000_5270000 (incorporated herein as SEQ ID NO: 1), within intron 1. In certain embodiments, compounds provided herein target Androgen Receptor upstream of the ligand binding domain, which is encoded by exons 4-8. In certain aspects, compounds targeted to Androgen Receptor upstream of the ligand binding domain is targeted to a region of AR upstream of the 3' end of exon 3. In certain embodiments, compounds targeted to Androgen Receptor upstream of the ligand binding domain is targeted within exon 1 encoding the N-terminal domain or exons 2 and 3 encoding the DNA binding domain.

Hybridization

In some embodiments, hybridization occurs between an antisense compound disclosed herein and an Androgen Receptor. The most common mechanism of hybridization involves hydrogen bonding (e.g., Watson-Crick, Hoogsteen or reversed Hoogsteen hydrogen bonding) between complementary nucleobases of the nucleic acid molecules.

Hybridization can occur under varying conditions. Stringent conditions are sequence-dependent and are determined by the nature and composition of the nucleic acid molecules to be hybridized.

Methods of determining whether a sequence is specifically hybridizable to a target nucleic acid are well known in the art. In certain embodiments, the antisense compounds provided herein are specifically hybridizable with Androgen Receptor.

Complementarity

An antisense compound and a target nucleic acid are complementary to each other when a sufficient number of nucleobases of the antisense compound can hydrogen bond with the corresponding nucleobases of the target nucleic acid, such that a desired effect will occur (e.g., antisense inhibition of a target nucleic acid, such as an Androgen Receptor nucleic acid).

Non-complementary nucleobases between an antisense compound and an Androgen Receptor nucleic acid may be tolerated provided that the antisense compound remains able to specifically hybridize to a target nucleic acid. Moreover, an antisense compound may hybridize over one or more segments of an Androgen Receptor nucleic acid such that intervening or adjacent segments are not involved in the hybridization event (e.g., a loop structure, mismatch or hairpin structure).

In certain embodiments, the antisense compounds provided herein, or a specified portion thereof, are, or are at least, 70%, 80%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% complementary to an Androgen Receptor nucleic acid, a target region, target segment, or specified portion thereof. Percent complementarity of an antisense compound with a target nucleic acid can be determined using routine methods.

For example, an antisense compound in which 18 of 20 nucleobases of the antisense compound are complementary to a target region, and would therefore specifically hybridize, would represent 90 percent complementarity. In this example, the remaining noncomplementary nucleobases may be clustered or interspersed with complementary nucleobases and need not be contiguous to each other or to complementary nucleobases. As such, an antisense compound which is 18 nucleobases in length having four noncomplementary nucleobases which are flanked by two regions of complete complementarity with the target nucleic acid would have 77.8% overall complementarity with the target nucleic acid and would thus fall within the scope of the present invention. Percent complementarity of an antisense compound with a region of a target nucleic acid can be determined routinely using BLAST programs (basic local alignment search tools) and PowerBLAST programs known in the art (Altschul et al., J. Mol. Biol., 1990, 215, 403 410; Zhang and Madden, Genome Res., 1997, 7, 649 656). Percent homology, sequence identity or complementarity, can be determined by, for example, the Gap program (Wisconsin Sequence Analysis Package, Version 8 for Unix, Genetics Computer Group, University Research Park, Madison Wis.), using default settings, which uses the algorithm of Smith and Waterman (Adv. Appl. Math., 1981, 2, 482 489).

In certain embodiments, the antisense compounds provided herein, or specified portions thereof, are fully complementary (i.e. 100% complementary) to a target nucleic acid, or specified portion thereof. For example, an antisense compound may be fully complementary to an Androgen Receptor nucleic acid, or a target region, or a target segment or target sequence thereof. As used herein, "fully complementary" means each nucleobase of an antisense compound is capable of precise base pairing with the corresponding nucleobases of a target nucleic acid. For example, a 20 nucleobase antisense compound is fully complementary to a target sequence that is 400 nucleobases long, so long as there is a corresponding 20 nucleobase portion of the target nucleic acid that is fully complementary to the antisense compound. Fully complementary can also be used in reference to a specified portion of the first and /or the second nucleic acid. For example, a 20 nucleobase portion of a 30 nucleobase antisense compound can be "fully complementary" to a target sequence that is 400 nucleobases long. The 20 nucleobase portion of the 30 nucleobase oligonucleotide is fully complementary to the target sequence if the target sequence has a corresponding 20 nucleobase portion wherein each nucleobase is complementary to the 20 nucleobase portion of the antisense compound. At the same time, the entire 30 nucleobase antisense compound may or may not be fully complementary to the target sequence, depending on whether the remaining 10 nucleobases of the antisense compound are also complementary to the target sequence. The location of a non-complementary nucleobase may be at the 5' end or 3' end of the antisense compound. Alternatively, the non-complementary nucleobase or nucleobases may be at an internal position of the antisense compound. When two or more non-complementary nucleobases are present, they may be contiguous (i.e. linked) or non-contiguous. In one embodiment, a non-complementary nucleobase is located in the wing segment of a gapmer antisense oligonucleotide.

In certain embodiments, antisense compounds that are, or are up to 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 nucleobases in length comprise no more than 4, no more than 3, no more than 2, or no more than 1 non-complementary nucleobase(s) relative to a target nucleic acid, such as an Androgen Receptor nucleic acid, or specified portion thereof.

In certain embodiments, antisense compounds that are, or are up to 11, 12, 13, 14, 15, 16, 17, 18,

19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, or 30 nucleobases in length comprise no more than 6, no more than 5, no more than 4, no more than 3, no more than 2, or no more than 1 non-complementary nucleobase(s) relative to a target nucleic acid, such as an Androgen Receptor nucleic acid, or specified portion thereof.

The antisense compounds provided also include those which are complementary to a portion of a target nucleic acid. As used herein, "portion" refers to a defined number of contiguous (i.e. linked) nucleobases within a region or segment of a target nucleic acid. A "portion" can also refer to a defined number of contiguous nucleobases of an antisense compound. In certain embodiments, the antisense compounds, are complementary to at least an 8 nucleobase portion of a target segment. In certain embodiments, the antisense compounds are complementary to at least a 9 nucleobase portion of a target segment. In certain embodiments, the antisense compounds are complementary to at least a 10 nucleobase portion of a target segment. In certain embodiments, the antisense compounds are complementary to at least an 11 nucleobase portion of a target segment. In certain embodiments, the antisense compounds are complementary to at least a 12 nucleobase portion of a target segment. In certain embodiments, the antisense compounds are complementary to at least a 13 nucleobase portion of a target segment. In certain embodiments, the antisense compounds are complementary to at least a 14 nucleobase portion of a target segment. In certain embodiments, the antisense compounds are complementary to at least a 15 nucleobase portion of a target segment. Also contemplated are antisense compounds that are complementary to at least a 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, or more nucleobase portion of a target segment, or a range defined by any two of these values. Identity

The antisense compounds provided herein may also have a defined percent identity to a particular nucleotide sequence, SEQ ID NO, or compound represented by a specific Isis number, or portion thereof. As used herein, an antisense compound is identical to the sequence disclosed herein if it has the same nucleobase pairing ability. For example, a RNA which contains uracil in place of thymidine in a disclosed DNA sequence would be considered identical to the DNA sequence since both uracil and thymidine pair with adenine. Shortened and lengthened versions of the antisense compounds described herein as well as compounds having non-identical bases relative to the antisense compounds provided herein also are contemplated. The non-identical bases may be adjacent to each other or dispersed throughout the antisense compound. Percent identity of an antisense compound is calculated according to the number of bases that have identical base pairing relative to the sequence to which it is being compared.

In certain embodiments, the antisense compounds, or portions thereof, are at least 70%, 75%, 80%, 85%, 90%, 95%, 96%, 97%, 98%, 99% or 100% identical to one or more of the antisense compounds or SEQ ID NOs, or a portion thereof, disclosed herein.

In certain embodiments, a portion of the antisense compound is compared to an equal length portion of the target nucleic acid. In certain embodiments, an 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25 nucleobase portion is compared to an equal length portion of the target nucleic acid.

In certain embodiments, a portion of the antisense oligonucleotide is compared to an equal length portion of the target nucleic acid. In certain embodiments, an 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25 nucleobase portion is compared to an equal length portion of the target nucleic acid.

Modifications

A nucleoside is a base-sugar combination. The nucleobase (also known as base) portion of the nucleoside is normally a heterocyclic base moiety. Nucleotides are nucleosides that further include a phosphate group covalently linked to the sugar portion of the nucleoside. For those nucleosides that include a pentofuranosyl sugar, the phosphate group can be linked to the 2', 3' or 5' hydroxyl moiety of the sugar. Oligonucleotides are formed through the covalent linkage of adjacent nucleosides to one another, to form a linear polymeric oligonucleotide. Within the oligonucleotide structure, the phosphate groups are commonly referred to as forming the internucleoside linkages of the oligonucleotide. Modifications to antisense compounds encompass substitutions or changes to intemucleoside linkages, sugar moieties, or nucleobases. Modified antisense compounds are often preferred over native forms because of desirable properties such as, for example, enhanced cellular uptake, enhanced affinity for nucleic acid target, increased stability in the presence of nucleases, or increased inhibitory activity.

Chemically modified nucleosides may also be employed to increase the binding affinity of a shortened or truncated antisense oligonucleotide for its target nucleic acid. Consequently, comparable results can often be obtained with shorter antisense compounds that have such chemically modified nucleosides.

Modified Intemucleoside Linkages

The naturally occuring intemucleoside linkage of RNA and DNA is a 3' to 5' phosphodiester linkage. Antisense compounds having one or more modified, i.e. non-naturally occurring, intemucleoside linkages are often selected over antisense compounds having naturally occurring intemucleoside linkages because of desirable properties such as, for example, enhanced cellular uptake, enhanced affinity for target nucleic acids, and increased stability in the presence of nucleases.

Oligonucleotides having modified intemucleoside linkages include intemucleoside linkages that retain a phosphorus atom as well as intemucleoside linkages that do not have a phosphorus atom. Representative phosphorus containing intemucleoside linkages include, but are not limited to, phosphodiesters, phosphotriesters, methylphosphonates, phosphoramidate, and phosphorothioates. Methods of preparation of phosphorous-containing and non-phosphorous-containing linkages are well known.

In certain embodiments, antisense compounds targeted to an Androgen Receptor nucleic acid comprise one or more modified intemucleoside linkages. In certain embodiments, the modified intemucleoside linkages are phosphorothioate linkages. In certain embodiments, each intemucleoside linkage of an antisense compound is a phosphorothioate intemucleoside linkage.

Modified Sugar Moieties

Antisense compounds can optionally contain one or more nucleosides wherein the sugar group has been modified. Such sugar modified nucleosides may impart enhanced nuclease stability, increased binding affinity, or some other beneficial biological property to the antisense compounds. In certain embodiments, nucleosides comprise chemically modified ribofuranose ring moieties. Examples of chemically modified ribof ranose rings include without limitation, addition of substitutent groups (including 5' and 2' substituent groups, bridging of non-geminal ring atoms to form bicyclic nucleic acids (BNA), replacement of the ribosyl ring oxygen atom with S, N(R), or C(Ri)(R₂) (R, Ri and R₂ are each independently H, C₁-C₁₂ alkyl or a protecting group) and combinations thereof. Examples of chemically modified sugars include 2'-F-5 '-methyl substituted nucleoside (see PCT International Application WO 2008/101157 Published on 8/21/08 for other disclosed 5',2'-bis substituted nucleosides) or replacement of the ribosyl ring oxygen atom with S with further substitution at the 2'-position (see published U.S. Patent Application US2005-0130923, published on June 16, 2005) or alternatively 5'-substitution of a BNA (see PCT International Application WO 2007/134181 Published on 11/22/07 wherein 4'-(CH₂)-0-2' (LNA) is substituted with for example a 5'-methyl or a 5'-vinyl group).

Examples of nucleosides having modified sugar moieties include without limitation nucleosides comprising 5'-vinyl, 5'-methyl (R or S), 4'-S, 2'-F, 2'-OCH₃, 2'-0CH₂CH₃, 2'-OCH₂CH₂F and T- 0(CH₂)₂OCH₃ substituent groups. The substituent at the 2' position can also be selected from allyl, amino, azido, thio, O-allyl, O-C_rC₁₀ alkyl, OCF₃, OCH₂F, 0(CH₂)₂SCH₃, 0(CH₂)₂-0-N(R_m)(R_n), 0-CH₂- C(=0)-N(R_m)(R_n), and 0-CH₂-C(=0)-N(R₁)-(CH₂)₂-N(R_m)(R_n), where each R_b R_m and R_n is, independently, H or substituted or unsubstituted C₁-C₁₀ alkyl.

As used herein, "bicyclic nucleosides" refer to modified nucleosides comprising a bicyclic sugar moiety. Examples of bicyclic nucleosides include without limitation nucleosides comprising a bridge between the 4' and the 2' ribosyl ring atoms. In certain embodiments, antisense compounds provided herein include one or more bicyclic nucleosides comprising a 4' to 2' bridge. Examples of such 4' to 2' bridged bicyclic nucleosides, include but are not limited to one of the formulae: 4'-(CH₂)-0-2' (LNA); 4'- (CH₂)-S-2'; 4'-(CH₂)₂-0-2' (ENA); 4'-CH(CH₃)-0-2' (also referred to as constrained ethyl or cEt) and 4'- CH(CH₂OCH₃)-0-2' (and analogs thereof see U.S. Patent 7,399,845, issued on July 15, 2008); 4'- C(CH₃)(CH₃)-0-2' (and analogs thereof see published International Application WO/2009/006478, published January 8, 2009); 4'-CH₂-N(OCH₃)-2' (and analogs thereof see published International Application WO/2008/150729, published December 11, 2008); 4'-CH₂-0-N(CH₃)-2' (see published U.S. Patent Application US2004-0171570, published September 2, 2004 ); 4'-CH₂-N(R)-0-2', wherein R is H, C₁-C₁₂ alkyl, or a protecting group (see U.S. Patent 7,427,672, issued on September 23, 2008); 4'-CH₂-C- (H)(CH₃)-2' (see Chattopadhyaya et al, J. Org. Chem., 2009, 74, 118-134); and 4'-CH₂-C(=CH₂)-2' (and analogs thereof see published International Application WO 2008/154401, published on December 8, 2008).

Further reports related to bicyclic nucleosides can also be found in published literature (see for example: Singh et al, Chem. Commun., 1998, 4, 455-456; Koshkin et al., Tetrahedron, 1998, 54, 3607- 3630; Wahlestedt et al, Proc. Natl. Acad. Sci. U. S. A. , 2000, 97, 5633-5638; Kumar et al, Bioorg. Med. Chem. Lett., 1998, 8, 2219-2222; Singh et al., J. Org. Chem., 1998, 63, 10035-10039; Srivastava et al., J. Am. Chem. Soc., 2007, 129(26) 8362-8379; Elayadi et al, Curr. Opinion Invest. Drugs, 2001, 2, 558-561 ; Braasch et al., Chem. Biol, 2001 , 8, 1 -7; and Orum et al, Curr. Opinion Mol. Ther., 2001 , 3, 239-243; U.S. Patent Nos. 6,268,490; 6,525,191 ; 6,670,461 ; 6,770,748; 6,794,499; 7,034, 133; 7,053,207; 7,399,845; 7,547,684; and 7,696,345; U.S. Patent Publication No. US2008-0039618; US2009-0012281 ; U.S. Patent Serial Nos. 60/989,574; 61/026,995; 61/026,998; 61/056,564; 61/086,231 ; 61/097,787; and 61/099,844; Published PCT International applications WO 1994/014226; WO 2004/106356; WO 2005/021570; WO 2007/134181 ; WO 2008/150729; WO 2008/154401 ; and WO 2009/006478. Each of the foregoing bicyclic nucleosides can be prepared having one or more stereochemical sugar configurations including for example a-L-ribofuranose and β-D-ribofuranose (see PCT international application PCT/DK98/00393, published on March 25, 1999 as WO 99/14226).

In certain embodiments, bicyclic sugar moieties of BNA nucleosides include, but are not limited to, compounds having at least one bridge between the 4' and the 2' position of the pentofuranosyl sugar moiety wherein such bridges independently comprises 1 or from 2 to 4 linked groups independently selected from -[C(R_a)(R_b)]_n-, -C(R_a)=C(R_b)-, -C(R_a)=N-, -C(=0)-, -C(=NR_a)-, -C(=S)-, -0-, -Si(R_a)₂-, - S(=0)_x-, and -N(R_a)-;

wherein:

x is 0, 1, or 2;

n is 1 , 2, 3, or 4;

each R_a and R_b is, independently, H, a protecting group, hydroxyl, C1-C12 alkyl, substituted d- Ci2 alkyl, C2-C12 alkenyl, substituted C2-C12 alkenyl, C2-C12 alkynyl, substituted C2-C12 alkynyl, C5-C20 aryl, substituted C5-C20 aryl, heterocycle radical, substituted heterocycle radical, heteroaryl, substituted heteroaryl, C₅-C₇ alicyclic radical, substituted C5-C7 alicyclic radical, halogen, OJi, NJiJ₂, SJI, N₃, COOJi, acyl (C(=0)-H), substituted acyl, CN, sulfonyl (S(=0)₂-Ji), or sulfoxyl (S(=0)-Ji); and

each J_! and J₂ is, independently, H, C_rCi₂ alkyl, substituted C_rCi₂ alkyl, C₂-C₁₂ alkenyl, substituted C₂-Ci₂ alkenyl, C₂-Ci alkynyl, substituted C₂-C₁₂ alkynyl, C₅-C₂₀ aryl, substituted C₅-C ₀ aryl, acyl (C(=0)-H), substituted acyl, a heterocycle radical, a substituted heterocycle radical, C1-C12 aminoalkyl, substituted C1-C12 aminoalkyl or a protecting group.

In certain embodiments, the bridge of a bicyclic sugar moiety is -[C(R_a)(R_b)]_n-, -[C(R_a)(R_b)]_n-0-

, -C(R_aR_b)-N(R)-0- or -C(R_aR_b)-0-N(R)-. In certain embodiments, the bridge is 4'-CH₂-2', 4'-(CH₂)₂-2', 4'-(CH₂)3-2', 4'-CH₂-0-2', 4'-(CH₂)₂-0-2', 4'-CH₂-0-N(R)-2' and 4'-CH₂-N(R)-0-2'- wherein each R is, independently, H, a protecting group or Ci-C₁₂ alkyl.

In certain embodiments, bicyclic nucleosides are further defined by isomeric configuration. For example, a nucleoside comprising a 4'-2' methylene-oxy bridge, may be in the a-L configuration or in the β-D configuration. Previously, a-L-methyleneoxy (4'-CH₂-0-2') BNA's have been incorporated into antisense oligonucleotides that showed antisense activity (Frieden et al, Nucleic Acids Research, 2003, 21, 6365-6372).

In certain embodiments, bicyclic nucleosides include, but are not limited to, (A) a-L- methyleneoxy (4'-CH₂-0-2') BNA , (B) β-D-methyleneoxy (4'-CH₂-0-2') BNA , (C) ethyleneoxy (4'- (CH₂)₂-0-2') BNA , (D) aminooxy (4'-CH₂-0-N(R)-2') BNA, (E) oxyamino (4'-CH₂-N(R)-0-2') BNA, and (F) methyl(methyleneoxy) (4'-CH(CH₃)-0-2') BNA, (G) methylene-thio (4'-CH₂-S-2') BNA, (H) methylene-amino (4'-CH₂-N(R)-2') BNA, (I) methyl carbocyclic (4'-CH₂-CH(CH₃)-2') BNA, (J) propylene carbocyclic (4'-(CH₂)₃-2') BNA and (K) vinyl BNA as depicted below:

wherein Bx is the base moiety and R is independently H, a protecting group, C1-C12 alkyl or Ci- C12 alkoxy.

In certain embodiments, bicyclic nucleosides are provided having Formula I:

wherein:

Bx is a heterocyclic base moiety;

-Qa-Qb-Qc- is -CH₂-N(R_C)-CH₂-, -C(=0)-N(R_c)-CH₂-, -CH₂-0-N(R_c)-, -CH₂-N(R_c)-0- or -N(R_C)-

0-CH₂;

R_c is C₁-C₁₂ alkyl or an amino protecting group; and

T_a and T_b are each, independently H, a hydroxyl protecting group, a conjugate group, a reactive phosphorus group, a phosphorus moiety or a covalent attachment to a support medium.

In certain embodiments, bicyclic nucleosides are provided having Formula II:

wherein:

Bx is a heterocyclic base moiety;

T_a and T_b are each, independently H, a hydroxyl protecting group, a conjugate group, a reactive phosphorus group, a phosphorus moiety or a covalent attachment to a support medium;

Z_a is Ci-C₆ alkyl, C₂-C₆ alkenyl, C -C₆ alkynyl, substituted Ci-C₆ alkyl, substituted C₂-C₆ alkenyl, substituted C₂-C₆ alkynyl, acyl, substituted acyl, substituted amide, thiol or substituted thio.

In one embodiment, each of the substituted groups is, independently, mono or poly substituted with substituent groups independently selected from halogen, oxo, hydroxyl, OJ_c, NJ_cJ_d, SJ_C, N₃, OC(=X)J_c, and NJ_eC(=X)NJ_cJ_d, wherein each J_c, J_d and J_e is, independently, H, Ci-C₆ alkyl, or substituted Ci-C₆ alkyl and X is O or NJ_C.

In certain embodiments, bicyclic nucleosides are provided having Formula III:

wherein:

Bx is a heterocyclic base moiety;

Z_b is C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, substituted C1-C6 alkyl, substituted C2-C6 alkenyl, substituted C2-C6 alkynyl or substituted acyl (C(=0)-).

In certain embodiments, bicyclic nucleosides are provided having Formula IV:

wherein:

Bx is a heterocyclic base moiety;

R_d is Ci-Ce alkyl, substituted Ci-C₆ alkyl, C₂-C₆ alkenyl, substituted C₂-C₆ alkenyl, C₂-C₆ alkynyl or substituted C₂-C₆ alkynyl; each q_a, q_b, q_c and q_d is, independently, H, halogen, Ci-C₆ alkyl, substituted Ci-C₆ alkyl, C₂-C₆ alkenyl, substituted C₂-C₆ alkenyl, C₂-C₆ alkynyl or substituted C₂-C₆ alkynyl, Ci-C₆ alkoxyl, substituted Ci-C₆ alkoxyl, acyl, substituted acyl, Ci-C₆ aminoalkyl or substituted Ci-C₆ aminoalkyl;

In certain embodiments, bicyclic nucleosides are provided having Formula V:

wherein:

Bx is a heterocyclic base moiety;

Qa, Qb, q_e and q_f are each, independently, hydrogen, halogen, CrC₁₂ alkyl, substituted C1-C12 alkyl, C₂-Ci₂ alkenyl, substituted C₂-Ci₂ alkenyl, C₂-Ci₂ alkynyl, substituted C₂-Ci₂ alkynyl, C1-C12 alkoxy, substituted C C₁₂ alkoxy, OJ_j, SJ_J; SOJ_j, S0₂J_j, NJ_jJ_k, N₃, CN, C(=0)OJ_j, C(=0)NJ_jJ_k, C(=0)J_j, 0-C(=0)- NJ_jJ_k, N(H)C(=NH)NJ_jJ_k, N(H)C(=0)NJ_jJ_korN(H)C(=S)NJ_JJ_k;

or q_e and q_f together are

q_g and q_h are each, independently, H, halogen, C1-C12 alkyl or substituted C1-C12 alkyl.

The synthesis and preparation of the methyleneoxy (4'-CH₂-0-2') BNA monomers adenine, cytosine, guanine, 5-methyl-cytosine, thymine and uracil, along with their oligomerization, and nucleic acid recognition properties have been described (Koshkin et al., Tetrahedron, 1998, 54, 3607-3630). BNAs and preparation thereof are also described in WO 98/39352 and WO 99/14226.

Analogs of methyleneoxy (4'-CH₂-0-2') BNA and 2'-thio-BNAs, have also been prepared (Kumar et al., Bioorg. Med. Chem. Lett., 1998, 8, 2219-2222). Preparation of locked nucleoside analogs comprising oligodeoxynbonucleotide duplexes as substrates for nucleic acid polymerases has also been described (Wengel et al., WO 99/14226 ). Furthermore, synthesis of 2'-amino-BNA, a novel comformationally restricted high-affinity oligonucleotide analog has been described in the art (Singh et al, J. Org. Chem., 1998, 63, 10035-10039). In addition, 2'-amino- and 2'-methylamino-BNA's have been prepared and the thermal stability of their duplexes with complementary RNA and DNA strands has been previously reported.

In certain embodiments, bicyclic nucleosides are provided having Formula VI:

wherein:

Bx is a heterocyclic base moiety;

each q_;, ¾, q_k and qi is, independently, H, halogen, C₁-C₁₂ alkyl, substituted C₁-C₁₂ alkyl, C₂-Ci₂ alkenyl, substituted C₂-Ci₂ alkenyl, C₂-C₁₂ alkynyl, substituted C₂-C₁₂ alkynyl, C₁-C₁₂ alkoxyl, substituted C₁-C₁₂ alkoxyl, OJ_j; SJ_j, SOJ_j, S0₂J_j; NJ_jJ_k, N₃, CN, C(=0)OJ_js C(=0)NJ_jJ_k, C(=0)J_j; 0-C(=0)NJ_jJ_k, N(H)C(=NH)NJ_jJ_k, N(H)C(=0)NJ_jJ_korN(H)C(=S)NJ_jJ_k; and

q_; and q or ¾ and q_k together are =C(q_g)(q_h), wherein q_g and q_h are each, independently, H, halogen, C_rCi₂ alkyl or substituted C_rCi₂ alkyl.

One carbocyclic bicyclic nucleoside having a 4'-(CH₂)3-2' bridge and the alkenyl analog bridge 4'- CH=CH-CH₂-2' have been described (Freier et al, Nucleic Acids Research, 1997, 25(22), 4429-4443 and Albaek et al., J. Org. Chem., 2006, 71, 7731-7740). The synthesis and preparation of carbocyclic bicyclic nucleosides along with their oligomerization and biochemical studies have also been described (Srivastava ei a/., J. Am. Chem. Soc, 2007, 129(26), 8362-8379).

As used herein, "4'-2' bicyclic nucleoside" or "4' to 2' bicyclic nucleoside" refers to a bicyclic nucleoside comprising a furanose ring comprising a bridge connecting two carbon atoms of the furanose ring connects the 2' carbon atom and the 4' carbon atom of the sugar ring.

As used herein, "monocytic nucleosides" refer to nucleosides comprising modified sugar moieties that are not bicyclic sugar moieties. In certain embodiments, the sugar moiety, or sugar moiety analogue, of a nucleoside may be modified or substituted at any position. As used herein, "2' -modified sugar" means a furanosyl sugar modified at the 2' position. In certain embodiments, such modifications include substituents selected from: a halide, including, but not limited to substituted and unsubstituted alkoxy, substituted and unsubstituted thioalkyl, substituted and unsubstituted amino alkyl, substituted and unsubstituted alkyl, substituted and unsubstituted allyl, and substituted and unsubstituted alkynyl. In certain embodiments, 2' modifications are selected from substituents including, but not limited to: 0[(CH₂)_nO]_mCH₃, 0(CH₂)_nNH₂, 0(CH₂)_nCH₃, 0(CH₂)_nF, 0(CH₂)_nONH₂, OCH₂C(=0)N(H)CH_3; and 0(CH₂)_nON[(CH₂)_nCH₃]₂, where n and m are from 1 to about 10. Other 2'- substituent groups can also be selected from: C_rCi₂ alkyl, substituted alkyl, alkenyl, alkynyl, alkaryl, aralkyl, O-alkaryl or O-aralkyl, SH, SCH₃, OCN, CI, Br, CN, F, CF₃, OCF₃, SOCH₃, S0₂CH₃, ON0₂, N0₂, N₃, NH₂, heterocycloalkyl, heterocycloalkaryl, aminoalkylamino, polyalkylamino, substituted silyl, an RNA cleaving group, a reporter group, an intercalator, a group for improving pharmacokinetic properties, or a group for improving the pharmacodynamic properties of an antisense compound, and other substituents having similar properties. In certain embodiments, modifed nucleosides comprise a 2'-MOE side chain (Baker et al, J. Biol. Chem., 1997, 272, 11944-12000). Such 2'-MOE substitution have been described as having improved binding affinity compared to unmodified nucleosides and to other modified nucleosides, such as 2'- Omethyl, 0-propyl, and Oaminopropyl. Oligonucleotides having the 2'-MOE substituent also have been shown to be antisense inhibitors of gene expression with promising features for in vivo use (Martin, Helv. Chim. Acta, 1995, 78, 486-504; Altmann et al., Chimia, 1996, 50, 168-176; Altmann et al., Biochem. Soc. Trans., 1996, 24, 630-637; and Altmann et al., Nucleosides Nucleotides, 1997, 16, 917-926).

As used herein, a "modified tetrahydropyran nucleoside" or "modified THP nucleoside" means a nucleoside having a six-membered tetrahydropyran "sugar" substituted in for the pentofuranosyl residue in normal nucleosides (a sugar surrogate). Modified THP nucleosides include, but are not limited to, what is referred to in the art as hexitol nucleic acid (HNA), anitol nucleic acid (ANA), manitol nucleic acid (MNA) (see Leumann, Bioorg. Med. Chem., 2002, 10, 841-854) or fluoro HNA (F-HNA) having a tetrahydropyran ring system as illustrated below:

In certain embodiments, sugar surrogates are selected having Formula VII:

VII

wherein independently for each of said at least one tetrahydropyran nucleoside analog of Formula VII:

Bx is a heterocyclic base moiety;

T_a and T_b are each, independently, an internucleoside linking group linking the tetrahydropyran nucleoside analog to the antisense compound or one of T_a and T_b is an internucleoside linking group linking the tetrahydropyran nucleoside analog to the antisense compound and the other of T_a and T_b is H, a hydroxyl protecting group, a linked conjugate group or a 5' or 3'-terminal group;

Qi_> Q2, ¾3, ¾4, qs, qe nd q₇ are each independently, H, Ci-C₆ alkyl, substituted Ci-C₆ alkyl, C₂-C₆ alkenyl, substituted C₂-C₆ alkenyl, C₂-C₆ alkynyl or substituted C₂-C₆ alkynyl; and each of R_t and R₂ is selected from hydrogen, hydroxyl, halogen, subsitituted or unsubstituted alkoxy, NJ^, SJ_b N₃, OC(=X)J_b OC(=X)NJ₁J₂, NJ₃C(=X)NJ₁J₂ and CN, wherein X is O, S or and each J_b J₂ and J₃ is, independently, H or C_rC₆ alkyl.

In certain embodiments, the modified THP nucleosides of Formula VII are provided wherein qi, q₂, q3, q4, qs, qe and q₇ are each H. In certain embodiments, at least one of qi, q₂, q₃, q4, qs, qe and q₇ is other than H. In certain embodiments, at least one of qi, q₂, q₃, q₄, q₅, q₆ and q₇ is methyl. In certain embodiments, THP nucleosides of Formula VII are provided wherein one of Ri and R₂ is fluoro. In certain embodiments, Ri is fluoro and R₂ is H; R_L is methoxy and R₂ is H, and Ri is methoxyethoxy and R₂ is H.

In certain embodiments, sugar surrogates comprise rings having more than 5 atoms and more than one heteroatom. For example nucleosides comprising morpholino sugar moieties and their use in oligomeric compounds has been reported (see for example: Braasch et al., Biochemistry, 2002, 41, 4503- 4510; and U.S. Patents 5,698,685; 5,166,315; 5,185,444; and 5,034,506). As used here, the term "morpholino" means a sugar surrogate having the following formula:

In certain embodiments, morpholinos may be modified, for example by adding or altering various substituent groups from the above morpholino structure. Such sugar surrogates are referred to herein as "modifed morpholinos."

Combinations of modifications are also provided without limitation, such as 2'-F-5'-methyl substituted nucleosides (see PCT International Application WO 2008/101157 published on 8/21/08 for other disclosed 5', 2'-bis substituted nucleosides) and replacement of the ribosyl ring oxygen atom with S and further substitution at the 2'-position (see published U.S. Patent Application US2005-0130923, published on June 16, 2005) or alternatively 5'-substitution of a bicyclic nucleic acid (see PCT International Application WO 2007/134181, published on 11/22/07 wherein a 4'-CH₂-0-2' bicyclic nucleoside is further substituted at the 5' position with a 5'-methyl or a 5'-vinyl group). The synthesis and preparation of carbocyclic bicyclic nucleosides along with their oligomerization and biochemical studies have also been described (see, e.g., Srivastava et al, J. Am. Chem. Soc. 2007, 129(26), 8362-8379).

In certain embodiments, antisense compounds comprise one or more modified cyclohexenyl nucleosides, which is a nucleoside having a six-membered cyclohexenyl in place of the pentofuranosyl residue in naturally occurring nucleosides. Modified cyclohexenyl nucleosides include, but are not limited to those described in the art (see for example commonly owned, published PCT Application WO 2010/036696, published on April 10, 2010, Robeyns et al, J. Am. Chem. Soc, 2008, 130(6), 1979-1984; Horvath et al, Tetrahedron Letters, 2007, 48, 3621-3623; Nauwelaerts et al, J. Am. Chem. Soc, 2007, 129(30), 9340-9348; Gu et al.,, Nucleosides, Nucleotides & Nucleic Acids, 2005, 24(5-7), 993-998; Nauwelaerts et al, Nucleic Acids Research, 2005, 33(8), 2452-2463; Robeyns et al., Acta Crystallographica, Section F: Structural Biology and Crystallization Communications, 2005, F61(6), 585-586; Gu et al, Tetrahedron, 2004, 60(9), 2111-2123; Gu et al, Oligonucleotides, 2003, 13(6), 479- 489; Wang et al, J. Org. Chem., 2003, 68, 4499-4505; Verbeure et al, Nucleic Acids Research, 2001, 29(24), 4941-4947; Wang et al, J. Org. Chem., 2001, 66, 8478-82; Wang et al, Nucleosides, Nucleotides & Nucleic Acids, 2001, 20(4-7), 785-788; Wang et al, J. Am. Chem., 2000, 122, 8595-8602; Published PCT application, WO 06/047842; and Published PCT Application WO 01/049687; the text of each is incorporated by reference herein, in their entirety). Certain modified cyclohexenyl nucleosides have Formula X.

X

wherein independently for each of said at least one cyclohexenyl nucleoside analog of Formula

X:

Bx is a heterocyclic base moiety;

T3 and T₄ are each, independently, an internucleoside linking group linking the cyclohexenyl nucleoside analog to an antisense compound or one of T₃ and T₄ is an internucleoside linking group linking the tetrahydropyran nucleoside analog to an antisense compound and the other of T₃ and T₄ is H, a hydroxyl protecting group, a linked conjugate group, or a 5'-or 3 '-terminal group; and

qi, Q2, ¾3, ¾4, q5, q6, q7, q¾ and q₉ are each, independently, H, C_rC₆ alkyl, substituted Ci-C₆ alkyl, C₂-C₆ alkenyl, substituted C₂-C₆ alkenyl, C₂-C₆ alkynyl, substituted C₂-C₆ alkynyl or other sugar substituent group.

As used herein, "2'-modified" or "2'-substituted" refers to a nucleoside comprising a sugar comprising a substituent at the 2' position other than H or OH. 2'-modified nucleosides, include, but are not limited to, bicyclic nucleosides wherein the bridge connecting two carbon atoms of the sugar ring connects the 2' carbon and another carbon of the sugar ring; and nucleosides with non-bridging 2'substituents, such as allyl, amino, azido, thio, O-allyl, O-Ci-Cio alkyl, -OCF₃, 0-(CH₂)₂-0-CH₃, 2'- 0(CH₂)₂SCH₃, 0-(CH₂)₂-0-N(R_m)(R_n), or 0-CH₂-C(=0)-N(R_m)(R_n), where each R_m and R_n is, independently, H or substituted or unsubstituted CpCio alkyl. 2'-modifed nucleosides may further comprise other modifications, for example at other positions of the sugar and/or at the nucleobase.

As used herein, "2'-F" refers to a nucleoside comprising a sugar comprising a fluoro group at the 2' position of the sugar ring.

As used herein, "2'-OMe" or "2'-OCH₃" or "2'-0-methyl" each refers to a nucleoside comprising a sugar comprising an -OCH₃ group at the 2' position of the sugar ring.

As used herein, "oligonucleotide" refers to a compound comprising a plurality of linked nucleosides. In certain embodiments, one or more of the plurality of nucleosides is modified. In certain embodiments, an oligonucleotide comprises one or more ribonucleosides (RNA) and/or deoxyribonucleosides (DNA). Many other bicyclo and tricyclo sugar surrogate ring systems are also known in the art that can be used to modify nucleosides for incorporation into antisense compounds (see for example review article: Leumann, Bioorg. Med. Chem., 2002, 10, 841-854). Such ring systems can undergo various additional substitutions to enhance activity.

Methods for the preparations of modified sugars are well known to those skilled in the art. Some representative U.S. patents that teach the preparation of such modified sugars include without limitation, U.S.: 4,981,957; 5,118,800; 5,319,080; 5,359,044; 5,393,878; 5,446,137; 5,466,786; 5,514,785; 5,519,134; 5,567,811 ; 5,576,427; 5,591,722; 5,597,909; 5,610,300; 5,627,053; 5,639,873; 5,646,265; 5,670,633; 5,700,920; 5,792,847 and 6,600,032 and International Application PCT/US2005/019219, filed June 2, 2005 and published as WO 2005/121371 on December 22, 2005, and each of which is herein incorporated by reference in its entirety.

In nucleotides having modified sugar moieties, the nucleobase moieties (natural, modified or a combination thereof) are maintained for hybridization with an appropriate nucleic acid target.

In certain embodiments, antisense compounds comprise one or more nucleosides having modified sugar moieties. In certain embodiments, the modified sugar moiety is 2'-MOE. In certain embodiments, the 2'-MOE modified nucleosides are arranged in a gapmer motif. In certain embodiments, the modified sugar moiety is a bicyclic nucleoside having a (4'-CH(CH₃)-0-2') bridging group. In certain embodiments, the (4'-CH(CH₃)-0-2') modified nucleosides are arranged throughout the wings of a gapmer motif.

Modified Nucleobases

Nucleobase (or base) modifications or substitutions are structurally distinguishable from, yet functionally interchangeable with, naturally occurring or synthetic unmodified nucleobases. Both natural and modified nucleobases are capable of participating in hydrogen bonding. Such nucleobase modifications can impart nuclease stability, binding affinity or some other beneficial biological property to antisense compounds. Modified nucleobases include synthetic and natural nucleobases such as, for example, 5-methylcytosine (5-me-C). Certain nucleobase substitutions, including 5-methylcytosine substitutions, are particularly useful for increasing the binding affinity of an antisense compound for a target nucleic acid. For example, 5-methylcytosine substitutions have been shown to increase nucleic acid duplex stability by 0.6-1.2°C (Sanghvi, Y.S., Crooke, S.T. and Lebleu, B., eds., Antisense Research and Applications, CRC Press, Boca Raton, 1993, pp. 276-278). Additional modified nucleobases include 5-hydroxymethyl cytosine, xanthine, hypoxanthine, 2- aminoadenine, 6-methyl and other alkyl derivatives of adenine and guanine, 2-propyl and other alkyl derivatives of adenine and guanine, 2-thiouracil, 2-thiothymine and 2-thiocytosine, 5-halouracil and cytosine, 5-propynyl (-C≡C-CH3) uracil and cytosine and other alkynyl derivatives of pyrimidine bases, 6-azo uracil, cytosine and thymine, 5-uracil (pseudouracil), 4-thiouracil, 8-halo, 8-amino, 8-thiol, 8- thioalkyl, 8-hydroxyl and other 8-substituted adenines and guanines, 5-halo particularly 5-bromo, 5- trifluoromethyl and other 5-substituted uracils and cytosines, 7-methylguanine and 7-methyladenine, 2-F- adenine, 2-amino-adenine, 8-azaguanine and 8-azaadenine, 7-deazaguanine and 7-deazaadenine and 3- deazaguanine and 3-deazaadenine.

Heterocyclic base moieties can also include those in which the purine or pyrimidine base is replaced with other heterocycles, for example 7-deaza-adenine, 7-deazaguanosine, 2-aminopyridine and 2-pyridone. Nucleobases that are particularly useful for increasing the binding affinity of antisense compounds include 5-substituted pyrimidines, 6-azapyrimidines and N-2, N-6 and 0-6 substituted purines, including 2 aminopropyladenine, 5-propynyluracil and 5-propynylcytosine.

In certain embodiments, antisense compounds targeted to an Androgen Receptor nucleic acid comprise one or more modified nucleobases. In certain embodiments, shortened or gap-widened antisense oligonucleotides targeted to an Androgen Receptor nucleic acid comprise one or more modified nucleobases. In certain embodiments, the modified nucleobase is 5-methylcytosine. In certain embodiments, each cytosine is a 5-methylcytosine.

Conjugated Antisense compounds

Antisense compounds may be covalently linked to one or more moieties or conjugates which enhance the activity, cellular distribution or cellular uptake of the resulting antisense oligonucleotides. Typical conjugate groups include cholesterol moieties and lipid moieties. Additional conjugate groups include carbohydrates, phospholipids, biotin, phenazine, folate, phenanthridine, anthraquinone, acridine, fluoresceins, rhodamines, coumarins, and dyes.

Antisense compounds can also be modified to have one or more stabilizing groups that are generally attached to one or both termini of antisense compounds to enhance properties such as, for example, nuclease stability. Included in stabilizing groups are cap structures. These terminal modifications protect the antisense compound having terminal nucleic acid from exonuclease degradation, and can help in delivery and/or localization within a cell. The cap can be present at the 5'-terminus (5'- cap), or at the 3'-terminus (3'-cap), or can be present on both termini. Cap structures are well known in the art and include, for example, inverted deoxy abasic caps. Further 3' and 5'-stabilizing groups that can be used to cap one or both ends of an antisense compound to impart nuclease stability include those disclosed in WO 03/004602 published on January 16, 2003.

In certain embodiments, antisense compounds, including, but not limited to those particularly suited for use as ssRNA, are modified by attachment of one or more conjugate groups. In general, conjugate groups modify one or more properties of the attached oligonucleotide, including but not limited to pharmacodynamics, pharmacokinetics, stability, binding, absorption, cellular distribution, cellular uptake, charge and clearance. Conjugate groups are routinely used in the chemical arts and are linked directly or via an optional conjugate linking moiety or conjugate linking group to a parent compound such as an oligonucleotide. Conjugate groups includes without limitation, intercalators, reporter molecules, polyamines, polyamides, polyethylene glycols, thioethers, polyethers, cholesterols, thiocholesterols, cholic acid moieties, folate, lipids, phospholipids, biotin, phenazine, phenanthridine, anthraquinone, adamantane, acridine, fluoresceins, rhodamines, coumarins and dyes. Certain conjugate groups have been described previously, for example: cholesterol moiety (Letsinger et al., Proc. Natl. Acad. Sci. USA, 1989, 86, 6553-6556), cholic acid (Manoharan et al., Bioorg. Med. Chem. Let., 1994, 4, 1053-1060), a thioether, e.g., hexyl-S-tritylthiol (Manoharan et al., Ann. N.Y. Acad. Sci., 1992, 660, 306-309; Manoharan et al., Bioorg. Med. Chem. Let., 1993, 3, 2765-2770), a thiocholesterol (Oberhauser et al., Nucl. Acids Res., 1992, 20, 533-538), an aliphatic chain, e.g., do-decan-diol or undecyl residues (Saison- Behmoaras et al., EMBO J., 1991, 10, 1111-1118; Kabanov et al., FEBS Lett., 1990, 259, 327-330; Svinarchuk et al., Biochimie, 1993, 75, 49-54), a phospholipid, e.g., di-hexadecyl-rac-glycerol or triethyl-ammonium l,2-di-0-hexadecyl-rac-glycero-3-H-phosphonate (Manoharan et al., Tetrahedron Lett, 1995, 36, 3651-3654; Shea et al., Nucl. Acids Res., 1990, 18, 3777-3783), a polyamine or a polyethylene glycol chain (Manoharan et al., Nucleosides & Nucleotides, 1995, 14, 969-973), or adamantane acetic acid (Manoharan et al., Tetrahedron Lett, 1995, 36, 3651-3654), a palmityl moiety (Mishra et al., Biochim. Biophys. Acta, 1995, 1264, 229-237), or an octadecylamine or hexylamino- carbonyl-oxycholesterol moiety (Crooke et al., J. Pharmacol. Exp. Ther., 1996, 277, 923-937).

For additional conjugates including those useful for ssRNA and their placement within antisense compounds, see e.g., US Application No.; 61/583,963. Certain Indications

In certain embodiments, provided herein are methods of treating an individual comprising administering one or more pharmaceutical compositions as described herein. In certain embodiments, the individual has Kennedy's Disease.

As shown in the examples below, administering compounds targeted to AR, as described herein, have been shown to reduce the severity of physiological symptoms of Kennedy's Disease, including muscle strength loss, muscle atrophy, muscle cell size reduction, and muscle denervation. The ability of the compounds exemplified below to restore muscle strength, muscle cell size, and/or muscle nervation therefore demonstrates that symptoms of Kennedy's Disease may be reversed by treatment with a compound as described herein.

Additionally, administering compounds targeted to AR, as described herein, have been shown to prevent the onset and/or severity of physiological symptoms of Kennedy's Disease, including muscle strength loss, muscle atrophy, muscle cell size reduction, and muscle denervation. The ability of the compounds exemplified below to prevent the onset and/or severity of muscle strength loss, muscle atrophy, muscle cell size reduction, and/or muscle denervation therefore demonstrates that symptoms of Kennedy's Disease may be reversed by treatment with a compound as described herein.

Kennedy's Disease afflicts men who have an inherited AR gene mutation involving expansion of the CAG trinucleotide repeat. Kennedy's Disease is characterized by numerous physical and physiological signs and/or symptoms. Any symptom known to one of skill in the art to be associated with Kennedy's Disease can be ameliorated, treated, or prevented by the methods described above. In certain embodiments, the symptom can include any one or more of muscle fatigue, muscle cramping, muscle weakness, muscle atrophy, muscle twitching or tremoring; and/or bulbar signs such as difficulty with breathing, swallowing, and/or talking.

In vitro testing of antisense oligonucleotides

Described herein are methods for treatment of cells with antisense oligonucleotides, which can be modified appropriately for treatment with other antisense compounds.

Cells may be treated with antisense oligonucleotides when the cells reach approximately 60- 80% confluency in culture.

One reagent commonly used to introduce antisense oligonucleotides into cultured cells includes the cationic lipid transfection reagent LIPOFECTIN (Invitrogen, Carlsbad, CA). Antisense oligonucleotides may be mixed with LIPOFECTIN in OPTI-MEM 1 (Invitrogen, Carlsbad, CA) to achieve the desired final concentration of antisense oligonucleotide and a LIPOFECTIN concentration that may range from 2 to 12 ug/mL per 100 nM antisense oligonucleotide.

Another reagent used to introduce antisense oligonucleotides into cultured cells includes LIPOFECTAMINE (Invitrogen, Carlsbad, CA). Antisense oligonucleotide is mixed with LIPOFECTAMINE in OPTI-MEM 1 reduced serum medium (Invitrogen, Carlsbad, CA) to achieve the desired concentration of antisense oligonucleotide and a LIPOFECTAMINE concentration that may range from 2 to 12 ug/mL per 100 nM antisense oligonucleotide.

Another technique used to introduce antisense oligonucleotides into cultured cells includes electroporation.

Yet another technique used to introduce antisense oligonucleotides into cultured cells includes free uptake of the oligonucleotides by the cells.

Cells are treated with antisense oligonucleotides by routine methods. Cells may be harvested 16- 24 hours after antisense oligonucleotide treatment, at which time RNA or protein levels of target nucleic acids are measured by methods known in the art and described herein. In general, when treatments are performed in multiple replicates, the data are presented as the average of the replicate treatments.

The concentration of antisense oligonucleotide used varies from cell line to cell line. Methods to determine the optimal antisense oligonucleotide concentration for a particular cell line are well known in the art. Antisense oligonucleotides are typically used at concentrations ranging from 1 nM to 300 nM when transfected with LIPOFECTAMINE. Antisense oligonucleotides are used at higher concentrations ranging from 625 to 20,000 nM when transfected using electroporation.

RNA Isolation

RNA analysis can be performed on total cellular RNA or poly(A)+ niRNA. Methods of RNA isolation are well known in the art. RNA is prepared using methods well known in the art, for example, using the TRIZOL Reagent (Invitrogen, Carlsbad, CA) according to the manufacturer's recommended protocols.

Compositions and Methods for Formulating Pharmaceutical Compositions

Antisense compounds may be admixed with pharmaceutically acceptable active or inert substances for the preparation of pharmaceutical compositions or formulations. Compositions and methods for the formulation of pharmaceutical compositions are dependent upon a number of criteria, including, but not limited to, route of administration, extent of disease, or dose to be administered.

An antisense compound targeted to Androgen Receptor nucleic acid can be utilized in pharmaceutical compositions by combining the antisense compound with a suitable pharmaceutically acceptable diluent or carrier. In certain embodiments, a pharmaceutically acceptable diluent is water, such as sterile water suitable for injection. Accordingly, in one embodiment, employed in the methods described herein is a pharmaceutical composition comprising an antisense compound targeted to Androgen Receptor nucleic acid and a pharmaceutically acceptable diluent. In certain embodiments, the pharmaceutically acceptable diluent is water. In certain embodiments, the antisense compound is an antisense oligonucleotide provided herein.

Pharmaceutical compositions comprising antisense compounds encompass any pharmaceutically acceptable salts, esters, or salts of such esters, or any other oligonucleotide which, upon administration to an animal, including a human, is capable of providing (directly or indirectly) the biologically active metabolite or residue thereof. Accordingly, for example, the disclosure is also drawn to pharmaceutically acceptable salts of antisense compounds, prodrugs, pharmaceutically acceptable salts of such prodrugs, and other bioequivalents. Suitable pharmaceutically acceptable salts include, but are not limited to, sodium and potassium salts.

A prodrug can include the incorporation of additional nucleosides at one or both ends of an antisense compound which are cleaved by endogenous nucleases within the body, to form the active antisense compound.

In certain embodiments, the compounds or compositions further comprise a pharmaceutically acceptable carrier or diluent.

EXAMPLES Non-limiting disclosure and incorporation by reference

While certain compounds, compositions and methods described herein have been described with specificity in accordance with certain embodiments, the following examples serve only to illustrate the compounds described herein and are not intended to limit the same. Each of the references recited in the present application is incorporated herein by reference in its entirety. Example 1 : Antisense inhibition of human AR in HuVEC cells

Antisense oligonucleotides were designed targeting an AR nucleic acid and were tested for their effects on AR mRNA in vitro. The antisense oligonucleotides were tested in a series of experiments that had similar culture conditions. The results for each experiment are presented in separate tables shown below. Cultured HuVEC cells at a density of 20,000 cells per well were transfected using electroporation with 500 nM antisense oligonucleotide. After a treatment period of approximately 24 hours, RNA was isolated from the cells and AR mRNA levels were measured by quantitative real-time PCR. Human primer probe set RTS3559 (forward sequence TCCTTCACCAATGTCAACTCC, designated herein as SEQ ID NO: 9; reverse sequence GAGCCATCCAAACTCTTGAGA, designated herein as SEQ ID NO: 10; probe sequence AGTACCGCATGCACAAGTCCCG, designated herein as SEQ ID NO: 11) was used to measure mRNA levels. AR mRNA levels were adjusted according to total RNA content, as measured by RIBOGREEN®. Results are presented as percent inhibition of AR, relative to untreated control cells. A total of 155 oligonucleotides were tested. Only those oligonucleotides which were selected for further study are shown in Tables 1 and 2.

The newly designed chimeric antisense oligonucleotides in Tables 1 and 2 were designed as 3-10-

3 (S)-cET gapmers. The gapmers are 16 nucleosides in length, wherein the central gap segment comprises often 2'-deoxynucleosides and is flanked by wing segments on both the 5' direction and on the 3' direction comprising three nucleosides. Each nucleoside in the 5' wing segment and each nucleoside in the 3' wing segment has an (S)-cEt modification. The internucleoside linkages throughout each gapmer are phosphorothioate linkages. All cytosine residues throughout each gapmer are 5- methylcytosines. "Start site" indicates the 5'-most nucleoside to which the gapmer is targeted in the human gene sequence. "Stop site" indicates the 3'-most nucleoside to which the gapmer is targeted human gene sequence. Each gapmer listed in Tables 1 or 2 is targeted to either the human AR genomic sequence, designated herein as SEQ ID NO: 1 (GENBANK Accession No. NT Ol 1669.17 truncated from nucleotides 5079000 to 5270000) or the human AR mRNA sequence, designated herein as SEQ ID NO: 2 (GENBANK Accession No. NM_000044.3), or both, 'n a' indicates that the oligonucleotide does not target that particular gene sequence.

Table 1

4059 1197 549347 CTTCGCGCACGCTCTG 84 12

4534 1672 549358 ATGGTGCTGGCCTCGC 91 13

4655 1793 549360 GGTCGAAGTGCCCCCT 89 14

4699 1837 549361 GACACCGACACTGCCT 84 15

4755 1893 549362 CCCGAAGCTGTTCCCC 85 16

4865 2003 549366 CTTGCCTGCGCTGTCG 84 17

5060 2198 549371 GTTGTAGTAGTCGCGA 93 18

5062 2200 549372 AAGTTGTAGTAGTCGC 92 19

5155 2293 549374 GCGCTGCCGTAGTCCA 93 20

5265 2403 549377 AGGATGAGGAAGCGGC 90 21

5392 2530 549379 GCTCCCGCCTCGCCGC 86 22

5448 2586 549380 CGCTTTCCTGGCCCGC 94 23

5483 2621 549381 GCCGCCAGGGTACCAC 89 24 n/a 2721 549383 CCAAACGCATGTCCCC 88 25

102156 2801 549387 AGCTTCATCTCCACAG 84 26

n/a 2871 549388 TCCCTTCAGCGGCTCT 88 27

144856 2801 549390 TTTCTGCTGGCGCACA 89 28

Table 2

Target Target

Start Site Start Site % SEQ ID

ISIS No Sequence

for SEQ for SEQ inhibition NO

ID NO: 1 ID NO: 2

181695 3602 549414 GTTCATTCGAAGTTCA 81 32

182958 4164 549432 GAGGATCATCACAGAT 90 33

183049 4255 549434 CTAAACTTCCCGTGGC 96 34

58722

n a 549458 GTTGATTTAATGGTTG 95 35

58752

58725

n/a 549459 ATGGTTGATTTAATGG 96 36

58755

Example 2: Dose-dependent antisense inhibition of human AR in HuVEC cells

Gapmers from the study described above exhibiting significant in vitro inhibition of AR mRNA were selected and tested at various doses in HuVEC cells. Cells were plated at a density of 20,000 cells per well and transfected using electroporation with 18.5 nM, 55.6 nM, 166.7 nM, 500.0 nM and 1500.0 nM concentrations of antisense oligonucleotide, as specified in Tables 3 and 4. After a treatment period of approximately 16 hours, RNA was isolated from the cells and AR mRNA levels were measured by quantitative real-time PCR. Human AR primer probe set RTS3559 was used to measure mRNA levels. AR mRNA levels were adjusted according to total RNA content, as measured by RIBOGREEN^®. Results are presented as percent inhibition of AR, relative to untreated control cells. The antisense oligonucleotides were tested in a series of experiments that had similar culture conditions. The results for each experiment are presented in separate tables shown below.

The half maximal inhibitory concentration (IC₅o) of each oligonucleotide is also presented in Tables 3 and 4. As illustrated, AR mRNA levels were reduced in a dose-dependent manner in the antisense oligonucleotide treated cells.

Table 3

Table 4

Example 3: Antisense inhibition of human AR in HuVEC cells

Additional antisense oligonucleotides were designed targeting an AR nucleic acid and were tested for their effects on AR mRNA in vitro. Cultured HuVEC cells at a density of 20,000 cells per well were transfected using electroporation with 500 nM antisense oligonucleotide. After a treatment period of approximately 24 hours, RNA was isolated from the cells and AR mRNA levels were measured by quantitative real-time PCR. Human primer probe set RTS3559 was used to measure mRNA levels. AR mRNA levels were adjusted according to total RNA content, as measured by RIBOGREEN®. Results are presented as percent inhibition of AR, relative to untreated control cells. A total of 82 oligonucleotides were tested. Only those oligonucleotides which were selected for further study are shown in Table 5.

The newly designed chimeric antisense oligonucleotides in Table 5 were designed as 3-10-3 (S)- cET gapmers. The gapmers are 16 nucleosides in length, wherein the central gap segment comprises of ten 2'-deoxynucleosides and is flanked by wing segments on both the 5' direction and on the 3' direction comprising three nucleosides. Each nucleoside in the 5' wing segment and each nucleoside in the 3' wing segment has an (S)-cEt modification. Each nucleoside in the 5' wing segment and each nucleoside in the 3' wing segment has a 2'-MOE modification. The internucleoside linkages throughout each gapmer are phosphorothioate linkages. All cytosine residues throughout each gapmer are 5-methylcytosines. "Start site" indicates the 5 '-most nucleoside to which the gapmer is targeted in the human gene sequence. "Stop site" indicates the 3 '-most nucleoside to which the gapmer is targeted human gene sequence. Each gapmer listed in Table 5 is targeted to the human AR genomic sequence, designated herein as SEQ ID NO: 1 (GENBAN Accession No. NT_011669.17 truncated from nucleotides 5079000 to 5270000)

Table 5

Example 4: Dose-dependent antisense inhibition of human AR in HuVEC cells

Gapmers from the studies described above exhibiting significant in vitro inhibition of AR mRNA were selected and tested at various doses in HuVEC cells. Cells were plated at a density of 20,000 cells per well and transfected using electroporation with 31.3 nM, 62.5 nM, 125.0 nM, 250.0 nM, 500.0 nM, and 1000.0 nM concentrations of antisense oligonucleotide, as specified in Table 6. After a treatment period of approximately 16 hours, RNA was isolated from the cells and AR mRNA levels were measured by quantitative real-time PCR. Human AR primer probe set RTS3559 was used to measure mRNA levels. AR mRNA levels were adjusted according to total RNA content, as measured by RIBOGREEN^®. Results are presented as percent inhibition of AR, relative to untreated control cells. The antisense oligonucleotides were tested in a series of experiments that had similar culture conditions. The results for each experiment are presented in separate tables shown below.

The half maximal inhibitory concentration (IC₅₀) of each oligonucleotide is also presented in Table 6. As illustrated, AR mRNA levels were reduced in a dose-dependent manner in the antisense oligonucleotide treated cells.

Table 6

Example 5: Dose-dependent antisense inhibition of human AR in HuVEC cells

Additional antisense oligonucleotides were designed as deoxy, MOE and (S)-cEt oligonucleotides targeting AR gene sequences and were tested at various doses in HuVEC cells. The oligonucleotides are 16 nucleosides in length wherein the nucleoside have either a MOE sugar modification, an (S)-cEt sugar modification, or a deoxy modification. The 'Chemistry' column describes the sugar modifications of each oligonucleotide, 'k' indicates an (S)-cEt sugar modification; the number indicates the number of deoxynucleosides; otherwise 'd' indicates deoxyribose; and 'e' indicates a MOE modification. The internucleoside linkages throughout each gapmer are phosphorothioate linkages. All cytosine residues throughout each gapmer are 5-methylcytosines. The SEQ ID NO listed in the table refers to the oligonucleotide sequence. "Start site" indicates the 5 '-most nucleoside to which the gapmer is targeted in the human gene sequence. "Stop site" indicates the 3 '-most nucleoside to which the gapmer is targeted human gene sequence. Each gapmer listed in Table 7 is targeted to the human AR genomic sequence, designated herein as SEQ ID NO: 1 (GENBANK Accession No. NT 011669.17 truncated from nucleotides 5079000 to 5270000) Table 7

Cells were plated at a density of 20,000 cells per well and transfected using electroporation with 62.5 nM, 125.0 nM, 250.0 nM, 500.0 nM, and 1000.0 nM concentrations of antisense oligonucleotide, as specified in Tables 8-10. After a treatment period of approximately 16 hours, RNA was isolated from the cells and AR mRNA levels were measured by quantitative real-time PCR. Human AR primer probe set RTS3559 was used to measure mRNA levels. AR mRNA levels were adjusted according to total RNA content, as measured by RIBOGREEN^®. Results are presented as percent inhibition of AR, relative to untreated control cells. The antisense oligonucleotides were tested in a series of experiments that had similar culture conditions. The results for each experiment are presented in separate tables shown below.

The half maximal inhibitory concentration (IC₅₀) of each oligonucleotide is also presented in Tables 8-10. As illustrated, AR mRNA levels were reduced in a dose-dependent manner in some of the antisense oligonucleotide treated cells.

Table 8

Table 9

Table 10

Example 6: Antisense inhibition of human AR in HuVEC cells

Additional antisense oligonucleotides were designed targeting an AR nucleic acid and were tested for their effects on AR mRNA in vitro. Cultured HuVEC cells at a density of 20,000 cells per well were transfected using electroporation with 1,000 nM antisense oligonucleotide. After a treatment period of approximately 24 hours, RNA was isolated from the cells and AR mRNA levels were measured by quantitative real-time PCR. Human primer probe set RTS3559 was used to measure mRNA levels. AR mRNA levels were adjusted according to total RNA content, as measured by RIBOGREEN®. Results are presented as percent inhibition of AR, relative to untreated control cells. A total of 75 oligonucleotides were tested. Only those oligonucleotides which were selected for further study are shown in Table 11.

The newly designed chimeric antisense oligonucleotides in Table 11 were designed as 3-10-3 (S)- cET gapmers, 3-9-4 (S)-cEt gapmers, 4-8-4 (S)-cEt gapmers, 4-9-3 (S)-cEt gapmers, 5-7-4 (S)-cEt gapmers, 5-8-3 (S)-cEt gapmers, 6-7-3 (S)-cEt gapmers, or deoxy, MOE and (S)-cEt oligonucleotides. The 3-10-3 (S)-cEt gapmers are 16 nucleosides in length, wherein the central gap segment comprises of ten 2'-deoxynucleosides and is flanked by wing segments on both the 5' direction and on the 3' direction comprising three nucleosides. The 3-9-4 (S)-cEt gapmers are 16 nucleosides in length, wherein the central gap segment comprises of nine 2'-deoxynucleosides and is flanked by a wing segment on the 5' direction comprising three nucleotides and on the 3' direction comprising four nucleosides. The 4-8-4 (S)- cEt gapmers are 16 nucleosides in length, wherein the central gap segment comprises of eight 2'- deoxynucleosides and is flanked by wing segments on both the 5' direction and on the 3' direction comprising four nucleosides. The 4-9-3 (S)-cEt gapmers are 16 nucleosides in length, wherein the central gap segment comprises of nine 2'-deoxynucleosides and is flanked by a wing segment on the 5' direction comprising four nucleotides and on the 3' direction comprising three nucleosides. The 5-7-4 (S)-cEt gapmers are 16 nucleosides in length, wherein the central gap segment comprises of seven 2'- deoxynucleosides and is flanked by a wing segment on the 5' direction comprising five nucleotides and on the 3' direction comprising three four nucleotides. The 5-8-3 (S)-cEt gapmers are 16 nucleosides in length, wherein the central gap segment comprises of eight 2'-deoxynucleosides and is flanked by a wing segment on the 5' direction comprising five nucleotides and on the 3' direction comprising three nucleosides. The 6-7-3 (S)-cEt gapmers are 16 nucleosides in length, wherein the central gap segment comprises of seven 2'-deoxynucleosides and is flanked by a wing segment on the 5' direction comprising six nucleotides and on the 3' direction comprising three nucleosides. Each nucleoside in the 5' wing segment and each nucleoside in the 3 ' wing segment has an (S)-cEt modification. The deoxy, MOE and (S)-cEt oligonucleotides are 16 nucleosides in length wherein the nucleoside have either a MOE sugar modification, an (S)-cEt sugar modification, or a deoxy modification. The 'Chemistry' column describes the sugar modifications of each oligonucleotide, 'k' indicates an (S)-cEt sugar modification; the number indicates the number of deoxynucleosides; otherwise 'd' indicates deoxyribose; and 'e' indicates a MOE modification. The internucleoside linkages throughout each gapmer are phosphorothioate linkages. All cytosine residues throughout each gapmer are 5-methylcytosines.

The SEQ ID NO listed in the table refers to the oligonucleotide sequence. "Start site" indicates the 5 '-most nucleoside to which the gapmer is targeted in the human gene sequence. "Stop site" indicates the 3 '-most nucleoside to which the gapmer is targeted human gene sequence. Each gapmer listed in Table 11 is targeted to the human AR genomic sequence, designated herein as SEQ ID NO: 1 (GENBANK Accession No. NT_011669.17 truncated from nucleotides 5079000 to 5270000).

Table 11

58722 58737

GTTGATTTAATGGTTG 560132 kkk-9-kkke 58 35

58752 58767

58722 58737

GTTGATTTAATGGTTG 549458 kkk-10-kkk 87 35

58752 58767

58722 58737

GTTGATTTAATGGTTG 569223 eekkk-8-kkk 59 35

58752 58767

58722 58737

GTTGATTTAATGGTTG 569229 eekkk-7-kkke 57 35

58752 58767

58722 58737

GTTGATTTAATGGTTG 569238 ekkk-7-kkkee 51 35

58752 58767

58724 58739

TGGTTGATTTAATGGT 569215 kkk-9-kkke 59 38

58754 58769

58725 58740

ATGGTTGATTTAATGG 560133 kkk-9-kkke 53 36

58755 58770

58725 58740

ATGGTTGATTTAATGG 569220 ekkk-8-kkke 58 36

58755 58770

58722 58737

GTTGATTTAATGGTTG 586225 kkkkk-8-kkk 88 35

58752 58767

Example 7: Dose-dependent antisense inhibition of human AR in HuVEC cells

Antisense oligonucleotides from the studies described above exhibiting significant in vitro inhibition of AR mRNA were selected and tested at various doses in HuVEC cells. Cells were plated at a density of 20,000 cells per well and transfected using electroporation with 31.25 nM, 62.5 nM, 125. O nM, 250.0 nM, 500.0 nM, and 1000.0 nM concentrations of antisense oligonucleotide, as specified in Table 12. After a treatment period of approximately 16 hours, RNA was isolated from the cells and AR mRNA levels were measured by quantitative real-time PCR. Human AR primer probe set RTS3559 was used to measure mRNA levels. AR mRNA levels were adjusted according to total RNA content, as measured by RIBOGREEN^®. Results are presented as percent inhibition of AR, relative to untreated control cells. The half maximal inhibitory concentration (IC₅o) of each oligonucleotide is also presented in Table 12. As illustrated, AR mRNA levels were reduced in a dose-dependent manner in the antisense oligonucleotide treated cells.

Table 12

560132 8 19 21 53 65 85 252

560133 17 15 24 35 58 79 336

569215 12 2 26 55 71 90 234

569220 11 29 34 43 59 78 275

569223 21 20 30 59 73 87 191

569229 16 14 36 47 74 84 220

569238 4 32 33 54 71 88 202

Example 8: Dose-dependent antisense inhibition of human AR in HuVEC cells

Antisense oligonucleotides from the studies described above exhibiting significant in vitro inhibition of AR mRNA were selected and tested at various doses in HuVEC cells. Cells were plated at a density of 20,000 cells per well and transfected using electroporation with 46.9 nM, 187.5 nM, 750.0 nM, and 3000.0 nM concentrations of antisense oligonucleotide, as specified in Table 13. After a treatment period of approximately 16 hours, RNA was isolated from the cells and AR mRNA levels were measured by quantitative real-time PCR. Human AR primer probe set RTS3559 was used to measure mRNA levels. AR mRNA levels were adjusted according to total RNA content, as measured by RIBOGREEN^®. Results are presented as percent inhibition of AR, relative to untreated control cells. The half maximal inhibitory concentration (IC₅o) of each oligonucleotide is also presented in Table 13. As illustrated, AR mRNA levels were reduced in a dose-dependent manner in the antisense oligonucleotide treated cells.

Table 13

Example 9: Antisense inhibition of human AR in HuVEC cells

Additional antisense oligonucleotides were designed targeting an AR nucleic acid and were tested for their effects on AR mRNA in vitro. Cultured HuVEC cells at a density of 20,000 cells per well were transfected using electroporation with 500 nM antisense oligonucleotide. After a treatment period of approximately 24 hours, RNA was isolated from the cells and AR mRNA levels were measured by quantitative real-time PCR. Human primer probe set RTS3559 was used to measure mRNA levels. AR mRNA levels were adjusted according to total RNA content, as measured by RIBOGREEN®. Results are presented as percent inhibition of AR, relative to untreated control cells. A total of 616 oligonucleotides were tested. Only those oligonucleotides which were selected for further study are shown in Tables 14-21.

The newly designed chimeric antisense oligonucleotides in Tables 14-21 were designed as 3-10-3 (S)-cET gapmers. The gapmers are 16 nucleosides in length, wherein the central gap segment comprises of ten 2'-deoxynucleosides and is flanked by wing segments on both the 5' direction and on the 3' direction comprising three nucleosides. Each nucleoside in the 5' wing segment and each nucleoside in the 3' wing segment has an (S)-cEt modification. The internucleoside linkages throughout each gapmer are phosphorothioate linkages. All cytosine residues throughout each gapmer are 5-methylcytosines.

The SEQ ID NO listed in the table refers to the oligonucleotide sequence. "Start site" indicates the 5 '-most nucleoside to which the gapmer is targeted in the human gene sequence. "Stop site" indicates the 3 '-most nucleoside to which the gapmer is targeted human gene sequence. Each gapmer listed in Tables 14-21 is targeted to either the human AR genomic sequence, designated herein as SEQ ID NO: 1 (GENBANK Accession No. NT_011669.17 truncated from nucleotides 5079000 to 5270000) or the human AR mRNA sequence, designated herein as SEQ ID NO: 2 (GENBANK Accession No. NM 000044.3), or both, 'n/a' indicates that the oligonucleotide does not target that particular gene sequence.

Table 14

Table 15

4049 4064 GCTCTGGAACAGATTC 583728 45 73

4056 4071 CGCGCACGCTCTGGAA 583731 34 74

4062 4077 TCACTTCGCGCACGCT 583734 46 75

4066 4081 TGGATCACTTCGCGCA 583736 47 76

4070 4085 GTTCTGGATCACTTCG 583738 36 77

4101 4116 CGCTCGCGGCCTCTGG 583745 40 78

4103 4118 TGCGCTCGCGGCCTCT 583746 32 79

4105 4120 GCTGCGCTCGCGGCCT 583747 35 80

Table 17

Target Target

Start Stop

% SEQ ID Site on Site on Sequence ISIS No

inhibition NO SEQ ID SEQ ID NO:l NO:l

5062 5077 AAGTTGTAGTAGTCGC 549372 39 22

58722 58737

GTTGATTTAATGGTTG 549458 50 35

58752 58767

4109 4124 AGGTGCTGCGCTCGCG 583749 36 81

4305 4320 GCTGTTCCTCATCCAG 583759 38 82

4405 4420 TGCTGCGGCAGCCCCT 583771 40 83

4532 4547 GGTGCTGGCCTCGCTC 583787 37 84

4537 4552 TGCATGGTGCTGGCCT 583789 39 85

4539 4554 GTTGCATGGTGCTGGC 583790 39 86

4555 4570 TGCTGTTGCTGAAGGA 583795 63 87

4571 4586 GGATACTGCTTCCTGC 583796 65 88

4573 4588 TCGGATACTGCTTCCT 583797 35 89

4578 4593 TGCCTTCGGATACTGC 583799 65 90

4597 4612 CTCGCTCTCCCGCTGC 583802 37 91

4632 4647 TGTCCTTGGAGGAAGT 583809 45 92

4656 4671 TGGTCGAAGTGCCCCC 583818 42 93

4662 4677 CAGAAATGGTCGAAGT 583821 42 94

Table 18

Target Target

Start Stop

% SEQ ID Site on Site on Sequence ISIS No

inhibition NO SEQ ID SEQ ID NO:l NO:l

5062 5077 AAGTTGTAGTAGTCGC 549372 23 22

58722 58737 GTTGATTTAATGGTTG 549458 54 35 58752 58767

4747 4762 TGTTCCCCTGGACTCA 583833 37 95

4750 4765 AGCTGTTCCCCTGGAC 583834 52 96

4752 4767 GAAGCTGTTCCCCTGG 583835 44 97

4754 4769 CCGAAGCTGTTCCCCT 583836 37 98

4769 4784 GTACATGCAATCCCCC 583843 35 99

4798 4813 ACAGCGGGTGGAACTC 583847 34 100

4804 4819 GGACGCACAGCGGGTG 583850 38 101

4807 4822 GTGGGACGCACAGCGG 583851 33 102

4833 4848 TGCATTCGGCCAATGG 583853 33 103

4837 4852 CCTTTGCATTCGGCCA 583855 44 104

4839 4854 AACCTTTGCATTCGGC 583856 45 105

4868 4883 GCTCTTGCCTGCGCTG 583862 32 106

4872 4887 CAGTGCTCTTGCCTGC 583864 46 107

4874 4889 TTCAGTGCTCTTGCCT 583865 45 108

4876 4891 TCTTCAGTGCTCTTGC 583866 32 109

4887 4902 ACTCAGCAGTATCTTC 583868 34 110

4889 4904 ATACTCAGCAGTATCT 583871 47 111

4916 4931 TTTGGTGTAACCTCCC 583880 39 112

4918 4933 CCTTTGGTGTAACCTC 583881 47 113

4938 4953 CTAGGCTCTCGCCTTC 583890 32 114

4942 4957 CAGCCTAGGCTCTCGC 583892 35 115

4944 4959 AGCAGCCTAGGCTCTC 583893 34 116

4951 4966 CTGCCAGAGCAGCCTA 583896 37 117

Table 19

Target Target

Start Stop

% SEQ ID Site on Site on Sequence ISIS No

inhibition NO SEQ ID SEQ ID NO: l NO: l

5062 5077 AAGTTGTAGTAGTCGC 549372 37 22

58722 58737

GTTGATTTAATGGTTG 549458 47 35

58752 58767

5050 5065 TCGCGACTCTGGTACG 583917 37 118

5054 5069 GTAGTCGCGACTCTGG 583919 55 119

5056 5071 TAGTAGTCGCGACTCT 583920 42 120

5061 5076 AGTTGTAGTAGTCGCG 583922 37 121

5133 5148 TCTCCAGCTTGATGCG 583932 39 122

5141 5156 CAGCGGGTTCTCCAGC 583933 38 123

5293 5308 CCTTCTTCGGCTGTGA 583969 44 124

5308 5323 GGTCCATACAACTGGC 583975 42 125 Table 20

Example 10: Antisense inhibition of human AR in HuVEC cells

Additional antisense oligonucleotides were designed targeting an AR nucleic acid and were tested for their effects on AR mRNA in vitro. Cultured HuVEC cells at a density of 20,000 cells per well were transfected using electroporation with 1,000 nM antisense oligonucleotide. After a treatment period of approximately 24 hours, RNA was isolated from the cells and AR mRNA levels were measured by quantitative real-time PCR. Human primer probe set RTS3559 was used to measure mRNA levels. AR mRNA levels were adjusted according to total RNA content, as measured by RIBOGREEN®. Results are presented as percent inhibition of AR, relative to untreated control cells. A total of 385 oligonucleotides were tested. Only those oligonucleotides which were selected for further study are shown in Tables 22-26.

The newly designed chimeric antisense oligonucleotides in Tables 22-26 were designed as 3-10-3 (S)-cET gapmers. The gapmers are 16 nucleosides in length, wherein the central gap segment comprises of ten 2'-deoxynucleosides and is flanked by wing segments on both the 5' direction and on the 3' direction comprising three nucleosides. Each nucleoside in the 5' wing segment and each nucleoside in the 3' wing segment has an (S)-cEt modification. The internucleoside linkages throughout each gapmer are phosphorothioate linkages. All cytosine residues throughout each gapmer are 5-methylcytosines.

The SEQ ID NO listed in the table refers to the oligonucleotide sequence. "Start site" indicates the 5 '-most nucleoside to which the gapmer is targeted in the human gene sequence. "Stop site" indicates the 3 '-most nucleoside to which the gapmer is targeted human gene sequence. Each gapmer listed in Tables 22-26 is targeted to the human AR genomic sequence, designated herein as SEQ ID NO: 1 (GENBANK Accession No. NT_011669.17 truncated from nucleotides 5079000 to 5270000)

Table 22

13321 13336 GAGTGTTAATGAAGAC 584167 78 151

13346 13361 CTGATTAGCTATGACC 584168 70 152

13405 13420 AAACCTTTTGCTGGGT 584169 36 153

16555 16570 ATGAGTCCTCAGAATC 584179 74 154

16793 16808 GTAGATTCTAGCTTTG 584180 81 155

16968 16983 ACAGGCTCTGACTAGG 584183 76 156

17206 17221 TGTGTGACCCTTGGAC 584184 78 157

18865 18880 AAGTATGAGCATGGTT 584192 73 158

Table 23

Target Target

% SEQ ID Start Stop Sequence ISIS No

inhibition NO Site Site

5062 5077 AAGTTGTAGTAGTCGC 549372 59 22

58722 58737

GTTGATTTAATGGTTG 549458 76 35

58752 58767

29329 29344 GGATTCTCTACACACA 584233 62 159

32290 32305 CCATTTGTGCCAAACC 584242 62 160

33315 33330 AGGTTAGGGAGTAGGC 584245 70 161

39055 39070 TAGGGTTTGGTCAGAA 584263 56 162

42017 42032 GTTATCTTACTCTCCC 584274 70 163

Table 24

Target Target

% SEQ ID Start Stop Sequence ISIS No

inhibition NO Site Site

5062 5077 AAGTTGTAGTAGTCGC 549372 58 22

58722 58737

GTTGATTTAATGGTTG 549458 79 35

58752 58767

56050 56065 GATTGTGTATAGCTGC 584312 65 164

60902 60917 GGTTATGGTTCTGTCT 584329 58 165

67454 67469 CTTCATTGCAGGTCTG 584361 61 166

Table 25

Target Target

% SEQ ID Start Stop Sequence ISIS No

inhibition NO Site Site

5062 5077 AAGTTGTAGTAGTCGC 549372 70 22

58722 58737

GTTGATTTAATGGTTG 549458 76 35

58752 58767 114874 114889 TAGCCAACTTTCTTTA 584465 58 167

115365 115380 TTTGGTAACATTAGGC 584469 74 168

134971 134986 ATGGTTGTCCTGTACA 584495 58 169

Table 26

Target Target

% SEQ ID

Start Stop Sequence ISIS No

inhibition NO

Site Site

5062 5077 AAGTTGTAGTAGTCGC 549372 54 22

58722 58737

GTTGATTTAATGGTTG 549458 65 35

58752 58767

114874 114889 TAGCCAACTTTCTTTA 584465 54 167

115365 115380 TTTGGTAACATTAGGC 584469 63 168

134971 134986 ATGGTTGTCCTGTACA 584495 53 169

Example 11: Dose-dependent antisense inhibition of human AR in HuVEC cells

Gapmers from the studies described above exhibiting significant in vitro inhibition of AR mRNA were selected and tested at various doses in HuVEC cells. Cells were plated at a density of 20,000 cells per well and transfected using electroporation with 46.9 nM, 187.5 nM, 750.0 nM, and 3000.0 nM concentrations of antisense oligonucleotide, as specified in Tables 27-35. After a treatment period of approximately 16 hours, RNA was isolated from the cells and AR mRNA levels were measured by quantitative real-time PCR. Human AR primer probe set RTS3559 was used to measure mRNA levels. AR mRNA levels were adjusted according to total RNA content, as measured by RIBOGREEN^®. Results are presented as percent inhibition of AR, relative to untreated control cells.

The half maximal inhibitory concentration (IC₅o) of each oligonucleotide is also presented in Tables 27-35. As illustrated, AR mRNA levels were reduced in a dose-dependent manner in some of the antisense oligonucleotide treated cells.

Table 27

46.9 187.5 750.0 3000.0

ISIS No ic₅₀

nM nM nM nM (μΜ)

549372 7 41 70 91 0.32

549458 21 72 91 97 0.11

583542 9 28 47 66 0.90

583556 19 47 68 66 0.34

583559 30 49 63 80 0.22

583564 16 33 55 74 0.52 583566 0 28 50 74 0.73

583567 17 34 60 79 0.43

583571 18 36 53 59 0.80

583583 21 31 49 64 0.79

583584 24 44 52 73 0.41

583608 12 46 67 76 0.35

583609 16 48 63 73 0.36

583613 24 60 70 75 0.19

583635 35 56 69 78 0.13

583638 33 64 79 85 0.11

583649 28 50 68 84 0.20

583660 21 39 61 72 0.42

583662 27 59 75 75 0.15

Table 28

46.9 187.5 750.0 3000.0

ISIS No IC₅₀ nM nM nM nM (μΜ)

549372 13 29 69 90 0.37

549458 22 62 92 97 0.13

583620 0 17 44 54 1.85

583637 22 32 59 75 0.45

583642 18 35 67 74 0.46

583667 35 55 73 82 0.14

583685 32 53 73 81 0.16

583687 34 67 83 81 0.08

583688 3 26 50 60 1.05

583689 20 34 62 74 0.44

583692 8 47 61 71 0.44

583709 8 50 70 84 0.29

583712 15 47 72 78 0.29

583727 18 49 70 76 0.29

583728 9 48 67 70 0.40

583734 29 60 74 75 0.12

583736 21 38 60 63 0.51

583738 16 40 56 71 0.51

583745 19 51 68 77 0.27

Table 29

46.9 187.5 750.0 3000.0

ISIS No IC₅₀ nM nM nM nM (μΜ)

549372 5 36 69 88 0.36

549458 24 59 92 98 0.13 583693 12 39 64 80 0.38

583700 14 34 57 71 0.55

583713 29 51 67 74 0.22

583714 22 34 59 79 0.40

583719 22 46 65 72 0.32

583731 18 24 47 58 1.31

583746 24 44 65 67 0.35

583747 13 38 50 69 0.64

583771 17 27 47 69 0.77

583789 30 49 71 85 0.19

583790 17 42 65 81 0.32

583795 37 61 83 90 0.09

583796 38 69 83 90 0.07

583799 29 60 76 85 0.14

583809 13 37 68 81 0.36

583818 9 46 71 84 0.31

583821 11 35 61 77 0.46

Table 30

46.9 187.5 750.0 3000.0 ic₅₀ nM nM nM nM (μΜ)

549372 15 39 70 86 0.30

549458 19 58 89 96 0.15

583749 34 40 75 87 0.17

583759 5 28 61 67 0.63

583787 15 31 66 74 0.43

583797 21 50 74 82 0.22

583802 17 25 47 60 1.07

583834 34 54 73 84 0.13

583835 20 55 74 88 0.19

583836 11 27 67 86 0.39

583850 9 21 54 78 0.60

583855 22 50 81 91 0.18

583856 31 55 74 89 0.14

583864 30 49 72 85 0.17

583864 0 47 62 85 0.37

583865 33 42 68 85 0.19

583871 28 30 68 87 0.28

583880 13 52 78 92 0.22

583881 28 50 85 91 0.15 Table 31

Table 32

584128 20 22 41 72 0.74

584139 13 33 56 85 0.4

584141 22 37 61 85 0.29

Table 33

46.9 187.5 750.0 3000.0

ISIS No ic₅₀

nM nM nM nM (μΜ)

549372 0 28 64 88 0.42

549458 13 49 84 91 0.19

584106 3 13 12 32 >30

584111 22 30 59 84 0.33

584130 0 10 11 37 >30

584138 2 40 62 89 0.37

584145 6 32 63 88 0.36

584148 16 48 79 95 0.20

584152 28 59 87 95 0.11

584162 24 45 80 92 0.18

584166 34 52 84 92 0.10

584167 13 45 76 93 0.21

584179 1 25 62 87 0.44

584180 26 56 84 96 0.12

584183 3 41 64 87 0.31

584184 9 42 76 93 0.23

584192 1 34 73 95 0.30

Table 34

584465 0 0 32 51 2.5

584469 13 46 73 89 0.22

584495 0 14 55 74 0.65

Table 35

Example 12: Efficacy of antisense oligonucleotides targeting human androgen receptor (AR) in a transgenic mouse model

ISIS oligonucleotides targeting AR were evaluated for efficacy in the BAC human AR transgenic mouse model, FxAR121. These mice have acute urinary tract obstruction, onset of grip strength weakening at 10 weeks, and onset of premature death starting on the 16^th week. The survival of the mice after treatment with ISIS oligonucleotide was assessed.

Treatment Groups of 10 mice each were systemically injected with 100 mg/kg/week of ISIS 549372 or ISIS 549458. A control group of mice was systemically injected with phosphate buffered saline (PBS). After 4 weeks of dosing, the dose of antisense oligonucleotide was reduced to 50 mg/kg/week for 8wks.

Survival analysis

The mice were monitored daily and deaths were recorded. The data of the survival of the mice in the treatment and control groups are presented in Table 36. The results indicate that treatment of the mice with antisense oligonucleotides targeting AR significantly improved the survival rate of the mice.

Table 36

Survival (% of original number) of AR transgenic mice

Example 13: Efficacy of ISIS 549458 in the AR transgenic mouse model

ISIS 549458 was evaluated for efficacy in the BAC human AR transgenic (Tg) mouse model, FxAR121. Body weight, survival and grip strength was assessed.

Treatment

The treatment was started when the mice were 12 weeks of age and was carried out until they were 19 weeks old. A group of seven Tg mice was systemically injected with 50 mg/kg/week of ISIS 549458 for 8 weeks. A control group of five Tg mice was systemically injected with phosphate buffered saline (PBS) for 8 weeks. Another group of four wild-type mice was systemically injected with 50 mg/kg/week of ISIS 549458 for 8 weeks.

Survival analysis

The mice were monitored daily and deaths were recorded. The data of the survival of the mice in the treatment and control groups are presented in Table 37. The results indicate that treatment of the mice with antisense oligonucleotides targeting AR significantly improved the survival rate of the Tg mice. The weeks noted in the table indicate the age of the mice.

Table 37

Survival (% of original number)

Week 12 Week 17 Week 20 Week 21 Week 22 Week 32

PBS (Tg mice) 100 80 60 40 20 0 ISIS 549458 (Tg mice) 100 100 100 100 100 100

ISIS 549458 (WT mice) 100 100 100 100 100 100

Body weight analysis

The mice were weighed regularly and changes in weights were recorded. The data is presented Table 38. The results indicate that treatment of the mice with antisense oligonucleotides targeting AR significantly stabilizes the weights of the Tg mice compared to that of the control, and is comparable to the weights of the WT mice. The weeks noted in the table indicate the age of the mice.

Table 38

Weights (grams)

Muscle grip strength analysis

Grip tests were performed with a gri -strength meter (model I()27csx) purchased from Columbus Instruments (Columbus, OH). Untrained mice were tested five times in succession without rest and the highest number from the five tests was recorded for each mouse. The data is presented in Table 39. The results indicate that treatment of the mice with antisense oligonucleotides targeting AR significantly stabilizes the muscle grip strength of the Tg mice compared to that of the control, and is comparable to that of the WT mice, 'n.d.' indicates no data because of there were no surviving mice in that group at that time point.

Table 39

Grip Strength (g)

RNA analysis

R A was isolated from the liver of WT mice and Tg mice treated with PBS or ISIS 549458. Mouse and human AR mRNA expressions were analyzed by RT-PCR, The data is presented in Table 40. The results indicate that compared to the AR expression in 32-week old WT mice, treatment of either WT mice or Tg mice with antisense oligonucleotides targeting AR inhibited the expression of human AR mRNA expression.

Table 40

% expression of muscle AR mRNA levels in treated mice compared to a 32-week old WT PBS control

Muscle atrophy analysis

Muscle atrophy of external urethral sphincter muscle (EUS) was assessed by measuring the minimal diameter of the EUC muscle fibre microscopically using Aperio-Indica imaging system. The data is presented in Table 41. The results indicate that treatment of the mice with antisense oligonucleotides targeting AR improves EUS muscle atrophy of the Tg mice in a dose dependent manner when compared to that of the control, and is comparable to that of the WT mice.

Table 41

Muscle minimal diameter (μιη) in 24-week mice

Example 14: Effect of dose-dependent inhibition of AR in the AR transgenic mouse model

The effect of dose-dependent inhibition of AR mRNA expression in the AR Tg mice after treatment with ISIS 549458 was evaluated. Body weight, survival, grip strength and external urethral sphincter (EUS) muscle minimal diameter was assessed

Treatment

The treatment was started when the mice were 11 weeks of age. Groups of 5-8 Tg mice were systemically injected with 25 mg/kg/week of ISIS 549458 for 2 weeks, 4 weeks, or 8 weeks. A control group of five Tg mice was systemically injected with phosphate buffered saline (PBS) for 8 weeks. A groupsof six wild-type mice was systemically injected with PBS for 8 weeks.

Body weight analysis

The mice were weighed regularly and changes in weights were recorded. The data is presented in Table 42. The results indicate that treatment of the mice with antisense oligonucleotides targeting AR significantly stabilizes the weights of the Tg mice compared to that of the control Tg mice group, 'n.d.' indicates no data because of there were no surviving mice in that group at that time point.

Table 42

Weights (grams)

Muscle grip strength analysis

Grip tests were performed with a grip-strength meter (model 1027csx) purchased from Columbus Instruments (Columbus, OH). Untrained mice were tested five times in succession without rest and the highest number from the five tests was recorded for each mouse. The data is presented in Table 43. The results indicate that treatment of the mice with antisense oligonucleotides targeting AR significantly stabilizes the muscle grip strength of the Tg mice compared to that of the control, and is comparable to that of the WT mice, 'n.d.' indicates no data because of there were no surviving mice in that group at that time point.

Table 43

Grip Strength (g)

Survival analysis

5 The mice were monitored daily and deaths were recorded. The data of the survival of the mice in the treatment and control groups are presented in Table 44. The results indicate that treatment of the mice with antisense oligonucleotides targeting AR significantly improved the survival rate of the Tg mice, 'n.d.' indicates no data because of there were no surviving mice in that group at that time point.

Table 44

10 Survival (% of original number)

RNA analysis

RNA was isolated from the liver and muscle of 14-week old Tg mice treated with PBS, WT mice treated with ISIS 54945S for 8 weeks, and Tg mice treated with ISIS 549458 for 2 weeks, 4 weeks or 8 15 weeks. The mice undergoing treatment were sacrificed 10-11 weeks post-dose. Human AR mRNA

expression was analyzed by RT-PCR. The data is presented in Tables 45 and 46. The results indicate that treatment of the mice with antisense oligonucleotides targeting human AR specifically inhibited the expression of human AR mRNA compared to the Tg control.

Table 45

20 expression of mRNA in muscle compared to WT control mice

Table 46 expression of mRNA in liver compared to WT control mice

Muscle atrophy analysis

Muscle atrophy of external urethral sphincter muscle (EUS) was assessed by measuring the minimal diameter of the EUC muscle fibre microscopically using Aperio-Indica imaging system. The data is presented in Table 47. The results indicate that treatment of the mice with antisense oligonucleotides targeting AR improves EUS muscle atrophy of the Tg mice in a dose dependent manner when compared to that of the control, and is comparable to that of the WT mice.

Table 47

Muscle minimal diameter (μηι) in 24-week mice

Example 15: Efficacy of ISIS 549458 in a non-symptomatic AR transgenic mouse model

ISIS 549458 was evaluated for efficacy in the AR (Tg) mouse model at 6 weeks of age, when disease symptoms are not manifested. Body weight, survival, grip strength, muscle gene expression and EUS muscle fiber minimal diameter were assessed.

Treatment

The treatment was started when the mice were 6 weeks of age. A group of ten Tg mice was systemically injected with 50 mg/kg/week of ISIS 549458 for 4 weeks. A control group of nine Tg mice was systemically injected with PBS for 4 weeks. Two groups of wild-type mice were systemically injected with 50 mg/kg/week of ISIS 549458 or PBS for 4 weeks.

Body weight analysis The mice were weighed regularly and changes in weights were recorded. The data is presented Table 48. The results indicate that treatment of the mice with antisense oligonucleotides targeting AR significantly stabilizes the weights of the Tg mice compared to that of the control, and is comparable to the weights of the WT mice.

Table 48

Weights (grams)

Muscle grip strength analysis

Grip tests were performed with a grip -strength meter (model 1027csx) purchased from Columbus Instruments (Columbus, OH). Untrained mice were tested five times in succession without rest and the results of the five tests were averaged for each mouse. The data is presented in Table 49. The results indicate that treatment of the mice with antisense oligonucleotides targeting AR significantly stabilizes the muscle grip strength of the Tg mice compared to that of the control, and is comparable to that of the WT mice.

Table 49

Grip Strength (g)

Muscle atrophy analysis

Muscle atrophy was assessed in both external urethral sphincter muscle (EUS) and quadriceps muscle by imaging analysis. The data is presented in Table 50. The effect of antisense inhibition of total lean body mass was also measured with an Echo MRI system (Echo Medical System, Houston, TX) when the mice were 16 weeks of age. The data is presented in Table 51. The results indicate that treatment of the mice with antisense oligonucleotides targeting AR significantly improves EUS muscle atrophy and prevents total lean body mass loss of the Tg mice compared to that of the control, and is comparable to that ofthe WT mice. Table 50

Muscle minimal diameter (μηι) in 10 and 16-week old mice

Table 51

Lean body mass content of 16-week mice

RNA analysis

RNA was isolated from the quadriceps muscle of 10-week old and 16-week old mice, and mouse and human AR mRNA expressions were analyzed by RT-PCR. The data is presented in Table 52. The results indicate that treatment of the mice with antisense oligonucleotides targeting human AR specifically inhibited the expression of human AR mRNA compared to the age matched PBS control. The expression of muscle denervation markers, cholinergic receptor (nicotinic alpha) mRNA, calcium channel, voltage dependent, L type, alpha IS subunit mRNA, myogenin mRNA, and MyoDl mRNA in the mice was also measured. The data is presented in Tables 53-56. The results indicate that treatment with ISIS 549458 inhibited cholinergic receptor, calcium channel, and myogenin expressions in the mice compared to the PBS Tg control.

Table 52

expression of AR mRNA

Table 53

expression of cholinergic receptor mRNA

Table 54

% change of calcium channel, voltage mRNA compared to 7-week old Tg control

Table 55

expression of muscle myogenin mRNA

Since Kennedy's patients experience difficulty in speech and in swallowing, tongue tissue mice was assessed. RNA was isolated from the tongue tissue of the ISIS 549458-treated and control-treated 16-week old mice, and human AR mRNA expression was analyzed by RT-PCR. The results indicate that treatment of the mice with ISIS 549458 decreased AR expression by 77% compared to untreated 10-week old mice. The results also showed that human AR expression in the PBS-treated control group was increased by 21% compared to the untreated 10-week old mice. Hence, human AR expression in ISIS 549458-treated 16-week old mice was reduced by over 90% compared to the control 16-week old mice.

Mouse AR expression was also analyzed by RT-PCR. The results indicate that treatment of the mice with ISIS 549458 decreased AR expression by 18% compared to untreated 10-week old mice. The results also showed that human AR expression in the PBS-treated control group was increased by 32% compared to the untreated 10-week old mice. Hence, mouse AR expression in ISIS 549458-tfeaied 16- week old mice was reduced by 50% compared to the control 16-week old mice.

Example 16: Antisense inhibition of human androgen receptor (AR) mRNA in C4-2B cells

C4-2B cells are androgen-independent human prostate adenocarcinoma cells commonly used in the field of oncology and have been established as clinically relevant cultured cells (Thalmann, G.N. et al, Cancer Res. 1994. 54: 2577). MDV3100 or Enzalutamide is an experimental androgen receptor antagonist drug developed by Medivation for the treatment of castration-resistant prostate cancer. The effect of ISIS 549372, ISIS 549458, ISIS 554221, and ISIS 549434 on AR mRNA levels was tested in MDV3100-resistant C4-2B MR cells.

Cells were plated at a density of 40,000/ml cells per well and cultured in RPMI1640 medium with 10% fetal bovine serum. The cells were cultured in the presence of 5 μΜ concentration of MDV3100 over the course of 2 months to induce MDV3100 resistance. ISIS 549372, ISIS 549458, ISIS 549434, and ISIS 554221 were each added at 0.04 μΜ, 0.20 μΜ, 1.00 μΜ, and 5.00 μΜ concentrations of antisense oligonucleotide to culture media for free uptake by the cells. A control oligonucleotide, ISIS 347526 (sequence TCTTATGTTTCCGAACCGTT (SEQ ID NO: 170) 5-10-5 MOE gapmer) with no known target region in human gene sequences, was included as a negative control. After a treatment period of 2 days, total AR mRNA levels were measured by quantitative real-time PCR. Human AR primer probe set hAR_LTS00943 (forward sequence GCCCCTGGATGGATAGCTACT, designated herein as SEQ ID NO: 171 ; reverse sequence CCACAGATCAGGCAGGTCTTC, designated herein as SEQ ID NO: 172; probe sequence ACTGCCAGGGACCATGTTTTGCCC, designated herein as SEQ ID NO: 173) was used to measure mRNA levels. AR mRNA levels were adjusted according to total RNA content, as measured by RIBOGREEN^®. Results are presented in Table 57 as percent inhibition of total AR, relative to untreated control cells. Treatment of the cells with ISIS 549372, ISIS 549458, and ISIS 549434 reduced full-length AR mRNA in a dose dependent manner more extensively than treatment with ISIS 554221.

Table 57

Percent inhibition of full-length AR mRNA in C4-2B MR cells

Example 17: Antisense inhibition of human androgen receptor (AR) mRNA in CWR22-RV1 cells

The effect of ISIS 549372, ISIS 549434, ISIS 549458, and ISIS 554221 AR mRNA levels was tested in CWR22-RV1 cells. CWR22-RV1 cells were plated and the ISIS oligonucleotides were individually added to the culture media at 1.7 nM, 5.0 nM, 16.7 nM, or 50 nM concentrations. ISIS 347526 was included as a negative control. After a treatment period of 6 days, the target reduction and proliferative capacity of the cancer cells was measured.

Antisense inhibition of AR full-length mRNA was measured with the RTS3559 primer probe set. The results are presented in Table 58 as percent inhibition relative to non-treated cells.

Table 58

Percent inhibition of AR full-length mRNA

Example 18: Effect of antisense inhibition of human androgen receptor (AR) mRNA by free uptake of antisense oligonucleotide by C4-2B cells

The effect of free uptake of antisense oligonucleotides on AR mRNA levels was investigated. ISIS 549372, ISIS 549434, ISIS 549458, and ISIS 554221 were tested.

Cells were plated at a concentration of 1,000 cells/well to measure cell proliferation and at 4,000 cells/well to measure target reduction. ISIS 549458, ISIS 549372, ISIS 549434, and ISIS 554221 were added individually at 0.04 μΜ, 0.20 μΜ, 1.00 μΜ, or 5.00 μΜ. After an incubation period of 24 hrs, mRNA levels were measured. The data is presented in Table 59. The results indicate that ISIS 549458, ISIS 549372, and ISIS 549434 inhibited AR mRNA expression more potently than ISIS 554221.

Table 59

Percent inhibition of AR full-length mRNA

Claims

WHAT IS CLAIMED:

1. A method of treating Kennedy's Disease in a subject comprising administering to the subject a modified antisense compound targeted to human androgen receptor (AR), thereby treating Kennedy's Disease in the subject.

2. A method of increasing muscle strength in a subject having Kennedy's Disease comprising administering to the subject a modified antisense compound targeted to human androgen receptor (AR), thereby increasing muscle strength in the subject.

3. A method of improving muscle atrophy in a subject having Kennedy's Disease comprising administering to the subject a modified antisense compound targeted to human androgen receptor (AR), thereby improving muscle atrophy in the subject.

4. The method of claim 3, wherein improving muscle atrophy increases the size of a muscle cell.

5. A method of inhibiting muscle denervation in a subject having Kennedy's Disease comprising administering to the subject a modified antisense compound targeted to human androgen receptor (AR), thereby inhibiting muscle denervation in the subject.

6. A method of preventing Kennedy's Disease in a subject having an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease comprising administering to the subject a modified antisense compound targeted to human AR, thereby preventing Kennedy's Disease in the subject.

7. A method of preventing muscle strength loss in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease comprising administering to the subject a modified antisense compound targeted to human AR, thereby preventing muscle strength loss in the subject.

8. A method of preventing muscle atrophy in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease comprising administering to the subject a modified antisense compound targeted to human AR, thereby preventing muscle atrophy in the subject.

9. The method of claim 8, wherein preventing muscle atrophy prevents a decrease in the size of a muscle cell.

10. A method of preventing muscle denervation in a subject carrying an Androgen Receptor (AR) gene mutation associated with Kennedy's Disease comprising administering to the subject a modified antisense compound targeted to human androgen receptor (AR), thereby preventing muscle denervation in the subject.

11. The method of any one of claims 2-10, wherein the muscle is a proximal limb or bulbar muscle.

12. The method of any one of claims 1-11, wherein the subject has an AR gene comprising an expansion of a CAG trinucleotide repeat compared to normal.

13. The method of claim 12, wherein the AR gene comprises an expansion of about 36-62 trinucleotide repeats.

14. The method of any one of claims 1-13, wherein the modified antisense compound is double-stranded.

15. The method of any one of claims 1-13, wherein the modified antisense compound is an antisense oligonucleotide.

16. The method of claim 15, wherein the antisense oligonucleotide is 8 to 80 nucleosides in length.

17. The method of claim 16, wherein the antisense oligonucleotide is 12 to 30 nucleosides in length.

18. The method of any one of claims 15-17, wherein the antisense oligonucleotide comprises at least one modified sugar.

19. The method of claim 18, wherein at least one modified sugar comprises a 2'-0- methoxy ethyl group.

20. The method of claim 19, wherein the at least one modified sugar is a bicyclic sugar.

21. The method of claim 20, wherein the bicyclic sugar comprises a 4'-CH(CH₃)-0-2' group.

22. The method of claim 20, wherein the bicyclic sugar comprises a 4'-CH₂-0-2' or 4'-

(CH₂)₂-0-2'group.

23. The method of any one of claims 15-22, wherein the antisense oligonucleotide comprises at least one modified internucleoside linkage.

24. The method of claim 23, wherein each internucleoside linkage of the antisense oligonucleotide is a phosphorothioate internucleoside linkage.

25. The method of any one of claims 15-24, wherein the antisense oligonucleotide comprises at least one modified nucleobase.

26. The method of claim 25, wherein the modified nucleobase is a 5-methylcytosine.

27. The method of any one of claims 15-26, wherein the antisense oligonucleotide comprises: a gap segment consisting of linked deoxynucleosides; a 5' wing segment consisting of linked nucleosides; and a 3' wing segment consisting of linked nucleosides; wherein the gap segment is positioned between the 5' wing segment and the 3' wing segment and wherein each nucleoside of each wing segment comprises a modified sugar.

I l l