Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
  • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
  • C07K16/28—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
  • C07K16/2881—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against CD71
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
  • A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
  • A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
  • A61K47/68—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment
  • A61K47/6801—Drug-antibody or immunoglobulin conjugates defined by the pharmacologically or therapeutically active agent
  • A61K47/6803—Drugs conjugated to an antibody or immunoglobulin, e.g. cisplatin-antibody conjugates
  • A61K47/6807—Drugs conjugated to an antibody or immunoglobulin, e.g. cisplatin-antibody conjugates the drug or compound being a sugar, nucleoside, nucleotide, nucleic acid, e.g. RNA antisense
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
  • A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
  • A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
  • A61K47/68—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment
  • A61K47/6835—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment the modifying agent being an antibody or an immunoglobulin bearing at least one antigen-binding site
  • A61K47/6849—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment the modifying agent being an antibody or an immunoglobulin bearing at least one antigen-binding site the antibody targeting a receptor, a cell surface antigen or a cell surface determinant
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P21/00—Drugs for disorders of the muscular or neuromuscular system
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K39/00—Medicinal preparations containing antigens or antibodies
  • A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K2317/00—Immunoglobulins specific features
  • C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
  • C07K2317/33—Crossreactivity, e.g. for species or epitope, or lack of said crossreactivity
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K2317/00—Immunoglobulins specific features
  • C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
  • C07K2317/34—Identification of a linear epitope shorter than 20 amino acid residues or of a conformational epitope defined by amino acid residues
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K2317/00—Immunoglobulins specific features
  • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
  • C07K2317/55—Fab or Fab'
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K2317/00—Immunoglobulins specific features
  • C07K2317/90—Immunoglobulins specific features characterized by (pharmaco)kinetic aspects or by stability of the immunoglobulin
  • C07K2317/92—Affinity (KD), association rate (Ka), dissociation rate (Kd) or EC50 value
• • C—CHEMISTRY; METALLURGY
  • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
  • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
  • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
  • C12N15/09—Recombinant DNA-technology
  • C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
  • C12N15/113—Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing
  • C12N15/1137—Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing against enzymes
• • C—CHEMISTRY; METALLURGY
  • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
  • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
  • C12N2310/00—Structure or type of the nucleic acid
  • C12N2310/10—Type of nucleic acid
• • C—CHEMISTRY; METALLURGY
  • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
  • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
  • C12N2320/00—Applications; Uses
  • C12N2320/30—Special therapeutic applications
  • C12N2320/32—Special delivery means, e.g. tissue-specific
• • C—CHEMISTRY; METALLURGY
  • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
  • C12Y—ENZYMES
  • C12Y207/00—Transferases transferring phosphorus-containing groups (2.7)
  • C12Y207/11—Protein-serine/threonine kinases (2.7.11)
  • C12Y207/11001—Non-specific serine/threonine protein kinase (2.7.11.1), i.e. casein kinase or checkpoint kinase

Definitions

• the antibody comprises a VH comprising an amino acid sequence at least 85% identical to SEQ ID NO: 7, and/or (e.g., and) a VL comprising an amino acid sequence at least 85% identical to SEQ ID NO: 8.
• the antibody comprises a CDR-H1 as set forth in SEQ ID NO: 238 or SEQ ID NO: 240, a CDR-H2 as set forth in SEQ ID NO: 166, a CDR-H3 as set forth in SEQ ID NO: 167; and/or a CDR-L1 as set forth in SEQ ID NO: 168, a CDR-L2 as set forth in SEQ ID NO: 169, and a CDR-L3 as set forth in SEQ ID NO: 22.
• the antibody comprises a heavy chain comprising an amino acid sequence at least 85% identical to SEQ ID NO: 180, and/or (e.g., and) a light chain comprising an amino acid sequence at least 85% identical to SEQ ID NO: 181.
• a heavy chain comprising an amino acid sequence at least 85% identical to SEQ ID NO: 182 and/or (e.g., and) a light chain comprising an amino acid sequence at least 85% identical to SEQ ID NO: 183.
• the present disclosure is based on the development of anti-TfR antibodies, e.g., antibodies listed in Table 1 and their variants, which showed high binding affinity and specificity to human TfR. Also provided are the use of the anti-TfR antibodies and their variants in research, diagnostic/detection, and therapeutic applications.
• the anti-TfR antibodies described herein are used for delivering molecular payloads (e.g., oligonucleotides, peptides, small molecules) to a target cell or tissue that expresses TfR.
• molecular payloads e.g., oligonucleotides, peptides, small molecules
• CDRs may be referred to as Rabat CDRs.
• Sub-portions of CDRs may be designated as LI, L2 and L3 or HI, H2 and H3 where the "L” and the "H” designates the light chain and the heavy chains regions, respectively. These regions may be referred to as Chothia CDRs, which have boundaries that overlap with Rabat CDRs.
• Other boundaries defining CDRs overlapping with the Rabat CDRs have been described by Padlan (FASEB J. 9:133-139 (1995)) and MacCallum (J Mol Biol 262(5):732-45 (1996)).
• Framework refers to the remaining sequences of a variable region minus the CDRs. Because the exact definition of a CDR sequence can be determined by different systems, the meaning of a framework sequence is subject to correspondingly different interpretations.
• agents binding to transferrin receptor are capable of targeting muscle cell and/or (e.g., and) mediate the transportation of an agent across the blood brain barrier.
• Transferrin receptors are internalizing cell surface receptors that transport transferrin across the cellular membrane and participate in the regulation and homeostasis of intracellular iron levels.
• Some aspects of the disclosure provide transferrin receptor binding proteins, which are capable of binding to transferrin receptor.
• Antibodies that bind, e.g. specifically bind, to a transferrin receptor may be internalized into the cell, e.g. through receptor-mediated endocytosis, upon binding to a transferrin receptor.
• the anti-TfR antibody of the present disclosure comprises a CDR-H1 having the amino acid sequence of SEQ ID NO: 1 (according to the IMGT definition system), a CDR-H2 having the amino acid sequence of SEQ ID NO: 2 (according to the IMGT definition system), a CDR-H3 having the amino acid sequence of SEQ ID NO: 3 (according to the IMGT definition system), a CDR-L1 having the amino acid sequence of SEQ ID NO: 4 (according to the IMGT definition system), a CDR-L2 having the amino acid sequence of SEQ ID NO: 5 (according to the IMGT definition system), and a CDR- L3 having the amino acid sequence of SEQ ID NO: 6 (according to the IMGT definition system).
• the anti-TfR antibody of the present disclosure comprises a CDR-L1, a CDR-L2, and a CDR-L3 that collectively are at least 75% (e.g., 75%, 80%, 85%, 90%, 95%, 98%, or 99%) identical to the to the CDR-L1 having the amino acid sequence of SEQ ID NO: 4, CDR-L2 having the amino acid sequence of SEQ ID NO: 5, and CDR-L3 having the amino acid sequence of SEQ ID NO: 6.
• 75% e.g., 75%, 80%, 85%, 90%, 95%, 98%, or 99%
• the anti-TfR antibody of the present disclosure comprises a VH comprising the amino acid sequence of SEQ ID NO: 23.
• the anti-TfR antibody of the present disclosure comprises a VL comprising the amino acid sequence of SEQ ID NO: 24.
• the anti-TfR antibody of the present disclosure comprises a VH containing no more than 25 amino acid variations (e.g., no more than 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 amino acid variation)no more than 25 amino acid variations (e.g., no more than 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 amino acid variation) as compared with the VH as set forth in SEQ ID NO: 23.
• amino acid variations e.g., no more than 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 amino acid variation
• the anti-TfR antibody of the present disclosure comprises a VH containing no more than 25 amino acid variations (e.g., no more than 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 amino acid variation)no more than 25 amino acid variations (e.g., no more than 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 amino acid variation) as compared with the VH as set forth in SEQ ID NO: 31.
• amino acid variations e.g., no more than 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 amino acid variation
• anti-TfR antibody of the present disclosure comprises a CDR-H1, a CDR-H2, and a CDR-H3, which collectively contains no more than 5 amino acid variations (e.g., no more than 5, 4, 3, 2, or 1 amino acid variation) as compared with the CDR- H1 having the amino acid sequence of SEQ ID NO: 79, CDR-H2 having the amino acid sequence of SEQ ID NO: 80, and CDR-H3 having the amino acid sequence of SEQ ID NO:
• the anti-TfR antibody of the present disclosure comprises: a CDR-L1 having no more than 3 amino acid variations (e.g., no more than 3, 2, or 1 amino acid variation) as compared with the CDR-L1 having the amino acid sequence of SEQ ID NO: 75; a CDR-L2 having no more than 3 amino acid variations (e.g., no more than 3, 2, or 1 amino acid variation) as compared with the CDR- L2 having the amino acid sequence of SEQ ID NO: 45; and/or (e.g., and) a CDR-L3 having no more than 3 amino acid variations (e.g., no more than 3, 2, or 1 amino acid variation) as compared with the CDR-L3 having the amino acid sequence of SEQ ID NO: 88.
• a CDR-L1 having no more than 3 amino acid variations e.g., no more than 3, 2, or 1 amino acid variation
• the anti-TfR antibody of the present disclosure comprises a CDR-L1, a CDR-L2, and a CDR-L3, which collectively contains no more than 5 amino acid variations (e.g., no more than 5, 4, 3, 2 or 1 amino acid variation) as compared with the CDR-L1 having the amino acid sequence of SEQ ID NO: 94, CDR-L2 having the amino acid sequence of SEQ ID NO: 95, and CDR-L3 having the amino acid sequence of SEQ ID NO: 96.
• the anti-TfR antibody of the present disclosure comprises a CDR-H1, a CDR-H2, and a CDR-H3 of a heavy chain variable domain having the amino acid sequence of SEQ ID NO: 104.
• the anti-TfR antibody of the present disclosure comprises a CDR-L1, a CDR-L2, and a CDR-L3 of a light chain variable domain having the amino acid sequence of SEQ ID NO: 105.
• the anti-TfR antibody of the present disclosure comprises a VH containing no more than 25 amino acid variations (e.g., no more than 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 amino acid variation) as compared with the VH as set forth in SEQ ID NO: 117.
• the anti-TfR antibody of the present disclosure comprises a VL containing no more than 25 amino acid variations (e.g., no more than 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 amino acid variation) as compared with the VL as set forth in SEQ ID NO: 118.
• the anti-TfR antibody of the present disclosure comprises: a CDR-L1 having no more than 3 amino acid variations (e.g., no more than 3, 2, or 1 amino acid variation) as compared with the CDR- L1 having the amino acid sequence of SEQ ID NO: 129; a CDR-L2 having no more than 3 amino acid variations (e.g., no more than 3, 2, or 1 amino acid variation) as compared with the CDR-L2 having the amino acid sequence of SEQ ID NO: 130; and/or (e.g., and) a CDR-L3 having no more than 3 amino acid variations (e.g., no more than 3, 2, or 1 amino acid variation) as compared with the CDR-L3 having the amino acid sequence of SEQ ID NO: 131.
• a CDR-L1 having no more than 3 amino acid variations e.g., no more than 3, 2, or 1 amino acid variation
• the anti-TfR antibody of the present disclosure comprises a CDR-L1, a CDR-L2, and a CDR-L3, which collectively contains no more than 5 amino acid variations (e.g., no more than 5, 4, 3, 2 or 1 amino acid variation) as compared with the CDR-L1 having the amino acid sequence of SEQ ID NO: 75, CDR-L2 having the amino acid sequence of SEQ ID NO: 45, and CDR-L3 having the amino acid sequence of SEQ ID NO: 135.
• no more than 5 amino acid variations e.g., no more than 5, 4, 3, 2 or 1 amino acid variation
• the anti-TfR antibody of the present disclosure comprises a VH comprising an amino acid sequence that is at least 75% (e.g., 75%, 80%, 85%, 90%, 95%, 98%, or 99%) identical to the VH as set forth in SEQ ID NO: 136.
• the anti-TfR antibody of the present disclosure comprises a VL comprising an amino acid sequence that is at least 75% (e.g., 75%, 80%, 85%, 90%, 95%,
• the anti-TfR antibody of the present disclosure comprises a CDR-H1, a CDR-H2, and a CDR-H3 that collectively are at least 75% (e.g., 75%, 80%, 85%, 90%, 95%, 98%, or 99%) identical to the CDR-H1 having the amino acid sequence of SEQ ID NO: 138, CDR-H2 having the amino acid sequence of SEQ ID NO: 139, and CDR- H3 having the amino acid sequence of SEQ ID NO: 140.
• 75% e.g., 75%, 80%, 85%, 90%, 95%, 98%, or 99%
• the anti-TfR antibody of the present disclosure comprises a VH comprising the amino acid sequence of SEQ ID NO: 143.
• the anti-TfR antibody of the present disclosure comprises a VL comprising the amino acid sequence of SEQ ID NO: 144.
• the anti-TfR antibody of the present disclosure comprises a CDR-L1, a CDR-L2, and a CDR-L3, which collectively contains no more than 5 amino acid variations (e.g., no more than 5, 4, 3, 2 or 1 amino acid variation) as compared with the CDR-L1 having the amino acid sequence of SEQ ID NO: 163, CDR-L2 having the amino acid sequence of SEQ ID NO: 13, and CDR-L3 having the amino acid sequence of SEQ ID NO: 164.
• the anti-TfR antibody of the present disclosure comprises a CDR-L1, a CDR-L2, and a CDR-L3, which collectively contains no more than 5 amino acid variations (e.g., no more than 5, 4, 3, 2 or 1 amino acid variation) as compared with the CDR-L1 having the amino acid sequence of SEQ ID NO: 168, CDR-L2 having the amino acid sequence of SEQ ID NO: 169, and CDR-L3 having the amino acid sequence of SEQ ID NO: 22.
• no more than 5 amino acid variations e.g., no more than 5, 4, 3, 2 or 1 amino acid variation
• the anti-TfR antibody of the present disclosure comprises a CDR-L1, a CDR-L2, and a CDR-L3 that collectively are at least 75% (e.g., 75%, 80%, 85%, 90%, 95%, 98%, or 99%) identical to the to the CDR-L1 having the amino acid sequence of SEQ ID NO: 168, CDR-L2 having the amino acid sequence of SEQ ID NO: 169, and CDR-L3 having the amino acid sequence of SEQ ID NO: 22.
• 75% e.g., 75%, 80%, 85%, 90%, 95%, 98%, or 99%
• VH FR1 Q V QLVQS G AE VKKPG AS VKV S C KAS (SEQ ID NO: 245);
• VL FR3 G VPDRF S GS GS GTDFTLKIS RVE AED V G V Y Y C (SEQ ID NO: 259);
• the anti-TfR antibody of the present disclosure comprises a humanized VH comprising a CDR-H1 having the amino acid sequence of SEQ ID NO: 145 (according to the Kabat definition system), a CDR-H2 having the amino acid sequence of SEQ ID NO: 146, SEQ ID NO: 234, or SEQ ID NO: 236 (according to the Kabat definition system), a CDR-H3 having the amino acid sequence of SEQ ID NO: 147 (according to the Kabat definition system), and is at least 75% (e.g., 75%, 80%, 85%, 90%, 95%, 98%, or 99%) identical in the framework regions to the VH as set forth in SEQ ID NO: 7.
• a humanized VH comprising a CDR-H1 having the amino acid sequence of SEQ ID NO: 145 (according to the Kabat definition system), a CDR-H2 having the amino acid sequence of SEQ ID NO: 146, SEQ ID NO: 234, or SEQ ID NO: 236
• the anti-TfR antibody of the present disclosure comprises a humanized VH comprising a CDR-H1 having the amino acid sequence of SEQ ID NO: 150 (according to the Chothia definition system), a CDR-H2 having the amino acid sequence of SEQ ID NO: 151, SEQ ID NO: 277, or SEQ ID NO: 278 (according to the Chothia definition system), a CDR-H3 having the amino acid sequence of SEQ ID NO: 152 (according to the Chothia definition system), and containing no more than 25 amino acid variations (e.g., no more than 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 amino acid variation) in the framework regions as compared with the VH as set forth in SEQ ID NO: 7.
• a humanized VH comprising a CDR-H1 having the amino acid sequence of SEQ ID NO: 150 (according to the Chothia definition system), a CDR-H2 having the amino acid sequence of SEQ
• the anti-TfR antibody of the present disclosure comprises a humanized VH comprising a CDR-H1 having the amino acid sequence of SEQ ID NO: 160 (according to the Chothia definition system), a CDR-H2 having the amino acid sequence of SEQ ID NO: 161 (according to the Chothia definition system), a CDR-H3 having the amino acid sequence of SEQ ID NO: 162 (according to the Chothia definition system), and containing no more than 25 amino acid variations (e.g., no more than 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 amino acid variation) in the framework regions as compared with the VH as set forth in SEQ ID NO: 15.
• a humanized VH comprising a CDR-H1 having the amino acid sequence of SEQ ID NO: 160 (according to the Chothia definition system), a CDR-H2 having the amino acid sequence of SEQ ID NO: 161 (according to the Chothia definition system),
• the anti-TfR antibody of the present disclosure comprises a humanized VL comprising a CDR-L1 having the amino acid sequence of SEQ ID NO: 163 (according to the Chothia definition system), a CDR-L2 having the amino acid sequence of SEQ ID NO: 13 (according to the Chothia definition system), and a CDR-L3 having the amino acid sequence of SEQ ID NO: 164 (according to the Chothia definition system), and is at least 75% (e.g., 75%, 80%, 85%, 90%, 95%, 98%, or 99%) identical in the framework regions to the VL as set forth in SEQ ID NO: 16.
• a humanized VL comprising a CDR-L1 having the amino acid sequence of SEQ ID NO: 163 (according to the Chothia definition system), a CDR-L2 having the amino acid sequence of SEQ ID NO: 13 (according to the Chothia definition system), and a CDR-L3 having the amino acid sequence of SEQ ID NO
• the anti-TfR antibody described herein comprises a heavy chain comprising any one of the VH as listed in Table 1 or any variants thereof and a heavy chain constant region as set forth in SEQ ID NO: 175. In some embodiments, the anti- TfR antibody described herein comprises heavy chain comprising any one of the VH as listed in Table 1 or any variants thereof and a heavy chain constant region as set forth in SEQ ID NO: 176.
• the anti-TfR antibody of the present disclosure comprises a heavy chain containing no more than 25 amino acid variations (e.g., no more than 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 amino acid variation) as compared with the heavy chain as set forth in any one of SEQ ID NOs: 185, 186, 187, and 273-276.
• 25 amino acid variations e.g., no more than 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 amino acid variation
• the anti-TfR antibody of the present disclosure comprises a light chain containing no more than 25 amino acid variations (e.g., no more than 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 amino acid variation) as compared with the light chain as set forth in SEQ ID NO: 183.
• the anti-TfR antibody described herein comprises a heavy chain comprising an amino acid sequence that is at least 75% (e.g., 75%, 80%, 85%, 90%, 95%, 98%, or 99%) identical to SEQ ID NO: 187, SEQ ID NO: 275, or SEQ ID NO: 276.
• the anti-TfR antibody described herein comprises a light chain comprising an amino acid sequence that is at least 75% (e.g., 75%,
• one, two or more amino acid mutations are introduced into an IgG constant domain, or FcRn- binding fragment thereof (preferably an Fc or hinge-Fc domain fragment) to alter (e.g., decrease or increase) half-life of the antibody in vivo.
• an IgG constant domain, or FcRn- binding fragment thereof preferably an Fc or hinge-Fc domain fragment
• an antibody comprises an IgG constant domain comprising one, two, three or more amino acid substitutions of amino acid residues at positions 251-257, 285-290, 308-314, 385-389, and 428-436, numbered according to the EU index as in Kabat. [000366] In some embodiments, one, two or more amino acid substitutions are introduced into an IgG constant domain Fc region to alter the effector function(s) of the anti-anti-TfR antibody.
• the one or more sugar or carbohydrate molecules are monosaccharides, disaccharides, oligosaccharides, or glycans. In some embodiments, the one or more sugar or carbohydrate molecule is a branched oligosaccharide or a branched glycan. In some embodiments, the one or more sugar or carbohydrate molecule includes a mannose unit, a glucose unit, an N- acetylglucosamine unit, an N-acetylgalactosamine unit, a galactose unit, a fucose unit, or a phospholipid unit.
• a single-chain antibody can be prepared via recombinant technology by linking a nucleotide sequence coding for a heavy chain variable region and a nucleotide sequence coding for a light chain variable region.
• a flexible linker is incorporated between the two variable regions.
• the vector can contain, for example, some or all of the following: a selectable marker gene, such as the neomycin gene for selection of stable or transient transfectants in mammalian cells; enhancer/promoter sequences from the immediate early gene of human CMV for high levels of transcription; transcription termination and RNA processing signals from SV40 for mRNA stability; SV40 polyoma origins of replication and ColEl for proper episomal replication; internal ribosome binding sites (IRESes), versatile multiple cloning sites; and T7 and SP6 RNA promoters for in vitro transcription of sense and antisense RNA.
• a selectable marker gene such as the neomycin gene for selection of stable or transient transfectants in mammalian cells
• enhancer/promoter sequences from the immediate early gene of human CMV for high levels of transcription
• transcription termination and RNA processing signals from SV40 for mRNA stability
• SV40 polyoma origins of replication and ColEl for proper episomal replication
• One or more vectors comprising nucleic acids encoding any of the antibodies may be introduced into suitable host cells for producing the antibodies.
• the host cells can be cultured under suitable conditions for expression of the antibody or any polypeptide chain thereof.
• Such antibodies or polypeptide chains thereof can be recovered by the cultured cells (e.g., from the cells or the culture supernatant) via a conventional method, e.g., affinity purification.
• polypeptide chains of the antibody can be incubated under suitable conditions for a suitable period of time allowing for production of the antibody.
• the anti-TfR antibodies described herein can be used for delivering a molecular payload to a target cell or a target tissue (e.g., a cell or tissue that expresses TfR).
• a target cell or a target tissue e.g., a cell or tissue that expresses TfR.
• some aspects of the present disclosure provide complexes comprising any one of the anti-TfR antibody described herein (e.g., 3-A4, 3-M12, or 5-H12 in IgG or FAB form as provided in Table 4 and Table 5, and variants (e.g., humanized variants) thereof) to a molecular payload.
• the complexes described herein may be used in various applications, e.g., diagnostic or therapeutic applications.
• Some aspects of the disclosure provide molecular payloads, e.g., for modulating a biological outcome, e.g., the transcription of a DNA sequence, the expression of a protein, or the activity of a protein, that can be linked to any one of the anti-TfR antibodies described herein.
• such molecular payloads are capable of targeting to a muscle cell, e.g., via specifically binding to a nucleic acid or protein in the muscle cell following delivery to the muscle cell by the linked anti-TfR antibody. It should be appreciated that various types of molecular payloads may be used in accordance with the disclosure.
• the CNS will be understood to include the eye, which is normally sequestered from the rest of the body by the blood-retina barrier.
• neurological disorders include, but are not limited to, neurodegenerative diseases (including, but not limited to, Lewy body disease, postpoliomyelitis syndrome, Shy-Draeger syndrome, olivopontocerebellar atrophy, Parkinson's disease, multiple system atrophy, striatonigral degeneration, tauopathies (including, but not limited to, Alzheimer disease and supranuclear palsy), prion diseases (including, but not limited to, bovine spongiform encephalopathy, scrapie, Creutzfeldt- Jakob syndrome, kuru, Gerstmann-Straussler-Scheinker disease, chronic wasting disease, and fatal familial insomnia), bulbar palsy, motor neuron disease, and nervous system heterodegenerative disorders (including, but not limited to, Canavan disease, Huntington's disease, neuronal ceroid-lipofus
• an oligonucleotide may be a guide nucleic acid (e.g., guide RNA) for directing activity of an enzyme (e.g., a gene editing enzyme).
• an enzyme e.g., a gene editing enzyme
• Other examples of oligonucleotides are provided herein. It should be appreciated that, in some embodiments, oligonucleotides in one format (e.g., antisense oligonucleotides) may be suitably adapted to another format (e.g., siRNA oligonucleotides) by incorporating functional sequences (e.g., antisense strand sequences) from one format to the other format.
• an oligonucleotide may comprise a region of complementarity to a target gene provided in Table 7.
• an oligonucleotide may contain 1, 2 or 3 base mismatches compared to the portion of the consecutive nucleotides of target nucleic acid. In some embodiments the oligonucleotide may have up to 3 mismatches over 15 bases, or up to 2 mismatches over 10 bases.
• nucleotide modifications may be used that make an oligonucleotide into which they are incorporated more resistant to nuclease digestion than the native oligodeoxynucleotide or oligoribonucleotide molecules; these modified oligonucleotides survive intact for a longer time than unmodified oligonucleotides.
• modified oligonucleotides include those comprising modified backbones, for example, modified internucleoside linkages such as phosphorothioates, phosphotriesters, methyl phosphonates, short chain alkyl or cycloalkyl intersugar linkages or short chain heteroatomic or heterocyclic intersugar linkages. Accordingly, oligonucleotides of the disclosure can be stabilized against nucleolytic degradation such as by the incorporation of a modification, e.g., a nucleotide modification.
• the oligonucleotide described herein comprises one or more 2’-4’ bicyclic nucleosides in which the ribose ring comprises a bridge moiety connecting two atoms in the ring, e.g., connecting the 2’-0 atom to the 4’-C atom via a methylene (LNA) bridge, an ethylene (ENA) bridge, or a (S)-constrained ethyl (cEt) bridge.
• LNA methylene
• ENA ethylene
• cEt a (S)-constrained ethyl
• the oligonucleotide comprises at least one modified nucleoside that results in an increase in Tm of the oligonucleotide in a range of 1°C, 2 °C, 3°C, 4 °C, or 5°C compared with an oligonucleotide that does not have the at least one modified nucleoside .
• an oligonucleotide described herein comprises a 5 - vinylphosphonate modification, one or more abasic residues, and/or one or more inverted abasic residues.
• oligonucleotide may contain a phosphorothioate or other modified intemucleoside linkage.
• the oligonucleotide comprises phosphorothioate intemucleoside linkages.
• the oligonucleotide comprises phosphorothioate intemucleoside linkages between at least two nucleotides.
• flanking sequences X and Z may be of 1-20 nucleotides, 1-8 nucleotides, or 1-5 nucleotides in length.
• the flanking sequences X and Z may be of similar length or of dissimilar lengths.
• the gap-segment Y may be a nucleotide sequence of 5-20 nucleotides, 5-15 twelve nucleotides, or 6-10 nucleotides in length.
• a gapmer is 10-40 nucleosides in length.
• a gapmer may be 10-40, 10-35, 10-30, 10-25, 10-20, 10-15, 15-40, 15-35, 15-30, 15-25, 15-20, 20-40,
• a gapmer comprises a 5'-X-Y-Z-3' configuration, wherein X and Z is independently 1-7 (e.g., 1, 2, 3, 4, 5, 6, or 7) nucleosides in length and Y is 6-10 (e.g., 6, 7, 8, 9, or 10) nucleosides in length, wherein each nucleoside in X and Z is a non- bicyclic 2’-modified nucleosides (e.g., 2’-MOE or 2’-0-Me) and each nucleoside in Y is a 2’- deoxyribonucleoside.
• X and Z is independently 1-7 (e.g., 1, 2, 3, 4, 5, 6, or 7) nucleosides in length and Y is 6-10 (e.g., 6, 7, 8, 9, or 10) nucleosides in length, wherein each nucleoside in X and Z is a non- bicyclic 2’-modified nucleosides (e.g., 2’-MOE or 2’
• the 5’wing region of the gapmer (X in the 5'-X-Y-Z-3' formula) may comprise one or more non-bicyclic 2’ -modified nucleosides (e.g., 2’-MOE or 2’-0-Me) and the 3 ’wing region of the gapmer (Z in the 5'-X-Y-Z-3' formula) may comprise one or more 2’-4’ bicyclic nucleosides (e.g., LNA or cEt).
• non-bicyclic 2’ -modified nucleosides e.g., 2’-MOE or 2’-0-Me
• the 3 ’wing region of the gapmer (Z in the 5'-X-Y-Z-3' formula) may comprise one or more 2’-4’ bicyclic nucleosides (e.g., LNA or cEt).
• Mixmers may be designed to comprise a mixture of affinity enhancing modified nucleosides, such as in non-limiting example LNA nucleosides and 2’-0-Me nucleosides.
• a mixmer comprises modified internucleoside linkages (e.g., phosphorothioate internucleoside linkages or other linkages) between at least two, at least three, at least four, at least five or more nucleosides.
• the sense strand is 8 to 50 nucleotides in length
• the sense strand comprises one or more modified nucleotides (e.g. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or more).
• the sense strand comprises one or more modified nucleotides and/or (e.g., and) one or more modified intemucleotide linkages.
• the modified nucleotide is a modified sugar moiety (e.g. a 2’ modified nucleotide).
• Any suitable small molecule may be used as a molecular payload, as described herein.
• a protein is an enzyme (e.g., an acid alpha- glucosidase, e.g., as encoded by the GAA gene).
• an enzyme e.g., an acid alpha- glucosidase, e.g., as encoded by the GAA gene.
• These peptides or proteins may be produced, synthesized, and/or (e.g., and) derivatized using several methodologies, e.g. phage displayed peptide libraries, one-bead one-compound peptide libraries, or positional scanning synthetic peptide combinatorial libraries. Exemplary methodologies have been characterized in the art and are incorporated by reference (Gray, B.P. and Brown, K.C. “Combinatorial Peptide Libraries: Mining for Cell-Binding Peptides” Chem Rev. 2014, 114:2, 1020-1081.;
• the gene expression construct encodes a protein that leads to a reduction in the expression of a protein (e.g., mutant protein) encoded by a gene in Table 7.
• the gene expression construct encodes a gene editing enzyme. Additional examples of nucleic acid constructs that may be used as molecular payloads are provided in International Patent Application Publication WO2017152149A1, published on September 19, 2017, entitled, “CLOSED-ENDED LINEAR DUPLEX DNA FOR NON- VIRAL GENE TRANSFER”; US Patent 8,853,377B2, issued on October 7, 2014, entitled, “MRNA FOR USE IN TREATMENT OF HUMAN GENETIC DISEASES”; and US Patent US8822663B2, issued on September 2, 2014, ENGINEERED NUCLEIC ACIDS AND METHODS OF USE THEREOF,” the contents of each of which are incorporated herein by reference in their entireties.
• the detectable label comprises biotin.
• the detectable molecule is a fluorescent polypeptide (e.g., GFP or a derivative thereof such as enhanced GFP (EGFP)) or a lucif erase (e.g., a firefly, Renilla, or Gaussia luciferase).
• a detectable label may react with a suitable substrate (e.g., a luciferin) to generate a detectable signal.
• suitable substrate e.g., a luciferin
• fluorescent proteins include GFP and derivatives thereof, proteins comprising chromophores that emit light of different colors such as red, yellow, and cyan fluorescent proteins, etc.
• Exemplary fluorescent proteins include, e.g., Sirius, Azurite, EBFP2, TagBFP, mTurquoise, ECFP, Cerulean, TagCFP, mTFPl, mUkGl, mAGl, AcGFPl, TagGFP2, EGFP, mWasabi, EmGFP, TagYPF, EYFP, Topaz, SYFP2, Venus, Citrine, mKO, mK02, mOrange, mOrange2, TagRFP, TagRFP-T, mStrawberry, mRuby, mCherry, mRaspberry, mKate2, mPlum, mNeptune, T- Sapphire, mAmetrine, mKeima. See, e.g., Chalfie, M. and Kain, SR (eds.)
• a precursor to a linker typically will contain two different reactive species that allow for attachment to both the anti-TfR antibody and a molecular payload.
• the two different reactive species may be a nucleophile and/or (e.g., and) an electrophile.
• a linker is connected to an anti-TfR antibody via conjugation to a lysine residue or a cysteine residue of the anti-TfR antibody.
• a linker is connected to an anti-TfR antibody and/or (e.g., and) molecular payload by an amide, thioamide, or sulfonamide bond reaction.
• a linker is connected to an anti-TfR antibody and/or (e.g., and) molecular payload by a condensation reaction to form an oxime, hydrazone, or semicarbazide group existing between the linker and the anti-TfR antibody and/or (e.g., and) molecular payload.
• m is any number from 0-10. In some embodiments, m is 4.
• the val-cit linker attached to a reactive chemical moiety e.g., SPAAC for click chemistry conjugation
• an anti-TfR antibody having a structure of: wherein m is any number from 0-10. In some embodiments, m is 4.
• n is any number from 0-10, wherein m is any number from 0-10. In some embodiments, n is 3 and/or (e.g., and) m is 4.
• LI is linked to the 5’ phosphorothioate of the oligonucleotide. In some embodiments, LI is linked to the 5’ phosphonoamidate of the oligonucleotide.
• the linker (e.g., a Val-cit linker) is linked to the antibody (e.g., an anti-TfR antibody described herein) via a thiol-reactive linkage (e.g., via a cysteine in the antibody).
• the linker (e.g., a Val-cit linker) is linked to the antibody (e.g., an anti-TfR antibody described herein) via a n amine group (e.g., via a lysine in the antibody).
• the complex described herein comprises an anti-TfR antibody covalently linked to a molecular payload, wherein the anti-TfR antibody comprises a CDR-H1, a CDR-H2, and a CDR-H3 that are the same as the CDR-H1, CDR-H2, and CDR- H3 shown in Table 3; and a CDR-L1, a CDR-L2, and a CDR-L3 that are the same as the CDR- Ll, CDR-L2, and CDR-L3 shown in Table 3.
• the complex described herein comprises an anti-TfR antibody covalently linked to a molecular payload, wherein the anti-TfR antibody comprises a VH having the amino acid sequence of SEQ ID NO: 7 and a VL having the amino acid sequence of SEQ ID NO: 8.
• the molecular payload is an oligonucleotide.
• the complex described herein comprises an anti-TfR antibody covalently linked to a molecular payload, wherein the anti-TfR antibody comprises a VH having the amino acid sequence of SEQ ID NO: 23 with the C at position 33 being substituted with Y or D, and a VL having the amino acid sequence of SEQ ID NO: 24.
• the molecular payload is an oligonucleotide.
• the complex described herein comprises an anti-TfR antibody covalently linked to a molecular payload, wherein the anti-TfR antibody comprises a heavy chain having the amino acid sequence of SEQ ID NO: 178, SEQ ID NO: 185, SEQ ID NO: 269, SEQ ID NO: 270, SEQ ID NO: 273, or SEQ ID NO: 274, and a light chain having the amino acid sequence of SEQ ID NO: 179.
• the molecular payload is an oligonucleotide.
• the complex described herein comprises an anti-TfR Fab covalently linked via a lysine to the 5’ end of an oligonucleotide, wherein the anti-TfR Fab comprises a CDR-H1 as set forth in SEQ ID NO: 1, a CDR-H2 as set forth in SEQ ID NO: 2, a CDR-H3 as set forth in SEQ ID NO: 3, a CDR-L1 as set forth in SEQ ID NO: 4, a CDR-L2 as set forth in SEQ ID NO: 5, and a CDR-L3 as set forth in SEQ ID NO: 6; wherein the complex has the structure of: wherein n is 3 and m is 4.
• the complex described herein comprises an anti-TfR Fab covalently linked via a lysine to the 5’ end of an oligonucleotide, wherein the anti-TfR Fab comprises a CDR-H1 as set forth in SEQ ID NO: 1, a CDR-H2 as set forth in SEQ ID NO:

Landscapes

• Health & Medical Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Bioinformatics & Cheminformatics (AREA)
• Immunology (AREA)
• Medicinal Chemistry (AREA)
• General Health & Medical Sciences (AREA)
• Veterinary Medicine (AREA)
• Organic Chemistry (AREA)
• Animal Behavior & Ethology (AREA)
• Public Health (AREA)
• Pharmacology & Pharmacy (AREA)
• Epidemiology (AREA)
• Molecular Biology (AREA)
• Biochemistry (AREA)
• Genetics & Genomics (AREA)
• Biophysics (AREA)
• Proteomics, Peptides & Aminoacids (AREA)
• Cell Biology (AREA)
• General Chemical & Material Sciences (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Neurology (AREA)
• Orthopedic Medicine & Surgery (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Physical Education & Sports Medicine (AREA)
• Peptides Or Proteins (AREA)
• Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
• Preparation Of Compounds By Using Micro-Organisms (AREA)
• Medicinal Preparation (AREA)
• Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)

Priority Applications (10)

Applications Claiming Priority (4)

Publications (1)

Family

ID=77079923

Family Applications (1)

Country Status (11)

Cited By (19)

Families Citing this family (3)

Citations (3)

Family Cites Families (9)

• 2021
  • 2021-01-08 CN CN202180025161.4A patent/CN115427059A/zh active Pending
  • 2021-01-08 BR BR112022014771A patent/BR112022014771A2/pt unknown
  • 2021-01-08 US US17/796,418 patent/US20230113823A1/en active Pending
  • 2021-01-08 KR KR1020227029398A patent/KR20220134584A/ko active Pending
  • 2021-01-08 AU AU2021213042A patent/AU2021213042A1/en active Pending
  • 2021-01-08 CA CA3163290A patent/CA3163290A1/en active Pending
  • 2021-01-08 WO PCT/US2021/012666 patent/WO2021154476A1/en not_active Ceased
  • 2021-01-08 JP JP2022546621A patent/JP7807379B2/ja active Active
  • 2021-01-08 MX MX2022009418A patent/MX2022009418A/es unknown
  • 2021-01-08 IL IL295022A patent/IL295022A/en unknown
  • 2021-01-08 EP EP21748405.4A patent/EP4096695A4/en active Pending

Patent Citations (3)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events