WO2015048329A2 - Matrix metalloproteinase substrates and other cleavable moieties and methods of use thereof - Google Patents
Matrix metalloproteinase substrates and other cleavable moieties and methods of use thereof Download PDFInfo
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- WO2015048329A2 WO2015048329A2 PCT/US2014/057523 US2014057523W WO2015048329A2 WO 2015048329 A2 WO2015048329 A2 WO 2015048329A2 US 2014057523 W US2014057523 W US 2014057523W WO 2015048329 A2 WO2015048329 A2 WO 2015048329A2
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Classifications
-
- 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
- A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/2866—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against receptors for cytokines, lymphokines, interferons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/2863—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against receptors for growth factors, growth regulators
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/44—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material not provided for elsewhere, e.g. haptens, metals, DNA, RNA, amino acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K7/00—Peptides having 5 to 20 amino acids in a fully defined sequence; Derivatives thereof
- C07K7/04—Linear peptides containing only normal peptide links
- C07K7/06—Linear peptides containing only normal peptide links having 5 to 11 amino acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
- C07K2317/73—Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
- C07K2319/50—Fusion polypeptide containing protease site
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
- C07K2319/95—Fusion polypeptide containing a motif/fusion for degradation (ubiquitin fusions, PEST sequence)
Definitions
- the invention relates generally to polypeptides that include a cleavable moiety that is a substrate for at least one matrix metalloprotease (MMP), to activatable antibodies and other larger molecules that include the cleavable moiety that is a substrate for at least one MMP protease, and to methods of making and using these polypeptides that include a cleavable moiety that is a substrate for at least one MMP protease in a variety of therapeutic, diagnostic and prophylactic indications.
- MMP matrix metalloprotease
- Proteases are enzymes that degrade proteins by cleaving the peptide bonds between amino acid residues. Proteases occur naturally in all organisms and are involved in a variety of physiological reactions from simple degradation to highly regulated pathways. Some proteases are known to break specific peptide bonds based on the presence of a particular amino acid sequence within a protein.
- CM cleavable moiety
- MMP matrix metalloprotease
- the CM is a substrate for at least one matrix metalloprotease (MMP).
- MMPs include MMP 1; MMP2; MMP3; MMP7; MMP 8; MMP9; MMP10; MMP 11; MMP 12; MMP 13; MMP 14; MMP 15; MMP 16;
- the CM is a substrate for MMP9, MMP 14, MMPl, MMP3, MMP 13, MMPl 7, MMP l 1, and MMPl 9. In some embodiments, the CM is a substrate for MMP9. In some embodiments, the CM is a substrate for MMP 14. In some embodiments, the CM is a substrate for two or more MMPs. In some embodiments, the CM is a substrate for at least MMP9 and MMPl 4. In some embodiments, the CM comprises two or more substrates for the same MMP. In some embodiments, the CM comprises at least two or more MMP9 substrates. In some embodiments, the CM comprises at least two or more MMP 14 substrates.
- the CM is a substrate for an MMP and includes the sequence ISSGLLSS (SEQ ID NO: 14); QNQALRMA (SEQ ID NO: 15); AQNLLGMV (SEQ ID NO: 16); STFPFGMF (SEQ ID NO: 17); PVGYTSSL (SEQ ID NO: 18);
- DWLYWPGI (SEQ ID NO: 19); MIAPVAYR (SEQ ID NO: 20); RPSPMWAY (SEQ ID NO: 21); WATPRPMR (SEQ ID NO: 22); FRLLDWQW (SEQ ID NO: 23); LKAAPRWA (SEQ ID NO: 24); GPSHLVLT (SEQ ID NO: 25); LPGGLSPW (SEQ ID NO: 26);
- MGLFSEAG SEQ ID NO: 27
- SPLPLRVP SEQ ID NO: 28
- RMHLRSLG SEQ ID NO: 29
- LAAPLGLL SEQ ID NO: 30
- AVGLLAPP SEQ ID NO: 31
- LLAPSHRA SEQ ID NO: 32
- PAGLWLDP SEQ ID NO: 33
- ISSGLSS SEQ ID NO: 159
- the CM comprises the amino acid sequence
- the CM comprises the amino acid sequence QNQALRMA (SEQ ID NO: 15). In some embodiments, the CM comprises the amino acid sequence AQNLLGMV (SEQ ID NO: 16). In some embodiments, the CM comprises the amino acid sequence STFPFGMF (SEQ ID NO: 17). In some embodiments, the CM comprises the amino acid sequence PVGYTSSL (SEQ ID NO: 18). In some embodiments, the CM comprises the amino acid sequence DWLYWPGI (SEQ ID NO: 19). In some embodiments, the CM comprises the amino acid sequence MIAPVAYR (SEQ ID NO: 20).
- the CM comprises the amino acid sequence RPSPMWAY (SEQ ID NO: 21). In some embodiments, the CM comprises the amino acid sequence WATPRPMR (SEQ ID NO: 22). In some embodiments, the CM comprises the amino acid sequence FRLLDWQW (SEQ ID NO: 23). In some embodiments, the CM comprises the amino acid sequence LKAAPRWA (SEQ ID NO: 24). In some embodiments, the CM comprises the amino acid sequence GPSHLVLT (SEQ ID NO: 25). In some embodiments, the CM comprises the amino acid sequence LPGGLSPW (SEQ ID NO: 26). In some embodiments, the CM comprises the amino acid sequence MGLFSEAG (SEQ ID NO: 27).
- the CM comprises the amino acid sequence SPLPLRVP (SEQ ID NO: 28). In some embodiments, the CM comprises the amino acid sequence RMHLRSLG (SEQ ID NO: 29). In some embodiments, the CM comprises the amino acid sequence LAAPLGLL (SEQ ID NO: 30). In some embodiments, the CM comprises the amino acid sequence AVGLLAPP (SEQ ID NO: 31). In some embodiments, the CM comprises the amino acid sequence LLAPSHRA (SEQ ID NO: 32). In some embodiments, the CM comprises the amino acid sequence PAGLWLDP (SEQ ID NO: 33). In some embodiments, the CM comprises the amino acid sequence ISSGLSS (SEQ ID NO: 159).
- the CM is linked or otherwise attached to an antibody.
- the CM is used to link one or more agents to the antibody or antigen binding fragment thereof (AB) that binds a given target, such that the CM is cleaved when exposed to the MMP and the agent is released from the AB.
- AB antigen binding fragment thereof
- Exemplary targets include, but are not limited to the targets shown in Table 1.
- Exemplary ABs include, but are not limited to, the targets shown in Table 2.
- the antibody in the uncleaved state has the structural arrangement from N-terminus to C-terminus as follows: Agent-CM-AB or AB-CM-Agent.
- the antibody comprises a linking peptide between the AB and the CM.
- the antibody comprises a linking peptide between the CM and the conjugated agent.
- the antibody comprises a first linking peptide (LP1) and a second linking peptide (LP2), and the antibody in the uncleaved state has the structural arrangement from N-terminus to C-terminus as follows: Agent-LPl-CM-LP2-AB or AB-LP2-CM-LP1 -Agent.
- each of LP1 and LP2 is a peptide of about 1 to 20 amino acids in length.
- the two linking peptides need not be identical to each other.
- At least one of LP1 or LP2 comprises an amino acid sequence selected from the group consisting of (GS) n , (GGS) n , (GSGGS) n (SEQ ID NO: 1) and (GGGS) n (SEQ ID NO: 2), where n is an integer of at least one.
- At least one of LP1 or LP2 comprises an amino acid sequence selected from the group consisting of GGSG (SEQ ID NO: 3), GGSGG (SEQ ID NO: 4), GSGSG (SEQ ID NO: 5), GSGGG (SEQ ID NO: 6), GGGSG (SEQ ID NO: 7), and GSSSG (SEQ ID NO: 8).
- LP 1 comprises the amino acid sequence
- GSSGGSGGSGGSG (SEQ ID NO: 9), GSSGGSGGSGG (SEQ ID NO: 10), GSSGGSGGSGGS (SEQ ID NO: 11), GSSGGSGGSGGSGGGS (SEQ ID NO: 155), GSSGGSGGSG (SEQ ID NO: 156), or GSSGGSGGSGS (SEQ ID NO: 157).
- LP2 comprises the amino acid sequence GSS, GGS,
- GGGS SEQ ID NO: 158
- GSSGT SEQ ID NO: 12
- GSSG SEQ ID NO: 13
- the AB has an equilibrium dissociation constant of about 100 nM or less for binding to the target.
- the antibody includes an antibody or antigen-binding fragment thereof that specifically binds a target.
- the antibody or immunologically active fragment thereof that binds the target is a monoclonal antibody, domain antibody, single chain, Fab fragment, a F(ab')2 fragment, a scFv, a scab, a dAb, a single domain heavy chain antibody, or a single domain light chain antibody.
- such an antibody or immunologically active fragment thereof that binds the target is a mouse, other rodent, chimeric, humanized or fully human monoclonal antibody.
- the MMP protease is co-localized with the target in a tissue, and the MMP protease cleaves the CM in the antibody when the antibody is exposed to the protease.
- the CM is a polypeptide of up to 15 amino acids in length.
- the CM is a substrate for at least one matrix metalloprotease (MMP).
- MMPs include MMP l; MMP2; MMP3; MMP7; MMP 8; MMP9; MMP10; MMP 11; MMP 12; MMP 13; MMP 14; MMP 15; MMP 16;
- the CM is a substrate for MMP9, MMP 14, MMPl, MMP 3, MMP 13, MMP 17, MMP l 1, and MMP19. In some embodiments, the CM is a substrate for MMP9. In some embodiments, the CM is a substrate for MMP 14. In some embodiments, the CM is a substrate for two or more MMPs. In some embodiments, the CM is a substrate for at least MMP9 and MMP 14. In some embodiments, the CM comprises two or more substrates for the same MMP. In some embodiments, the CM comprises at least two or more MMP9 substrates. In some embodiments, the CM comprises at least two or more MMP 14 substrates.
- the CM is a substrate for an MMP and includes the sequence ISSGLLSS (SEQ ID NO: 14); QNQALRMA (SEQ ID NO: 15); AQNLLGMV (SEQ ID NO: 16); STFPFGMF (SEQ ID NO: 17); PVGYTSSL (SEQ ID NO: 18); DWLYWPGI (SEQ ID NO: 19); MIAPVAYR (SEQ ID NO: 20); RPSPMWAY (SEQ ID NO: 21); WATPRPMR (SEQ ID NO: 22); FRLLDWQW (SEQ ID NO: 23); LKAAPRWA (SEQ ID NO: 24); GPSHLVLT (SEQ ID NO: 25); LPGGLSPW (SEQ ID NO: 26);
- MGLFSEAG SEQ ID NO: 27
- SPLPLRVP SEQ ID NO: 28
- RMHLRSLG SEQ ID NO: 29
- LAAPLGLL SEQ ID NO: 30
- AVGLLAPP SEQ ID NO: 31
- LLAPSHRA SEQ ID NO: 32
- PAGLWLDP SEQ ID NO: 33
- ISSGLSS SEQ ID NO: 159
- the CM comprises the amino acid sequence
- the CM comprises the amino acid sequence QNQALRMA (SEQ ID NO: 15). In some embodiments, the CM comprises the amino acid sequence AQNLLGMV (SEQ ID NO: 16). In some embodiments, the CM comprises the amino acid sequence STFPFGMF (SEQ ID NO: 17). In some embodiments, the CM comprises the amino acid sequence PVGYTSSL (SEQ ID NO: 18). In some embodiments, the CM comprises the amino acid sequence DWLYWPGI (SEQ ID NO: 19). In some embodiments, the CM comprises the amino acid sequence MIAPVAYR (SEQ ID NO: 20).
- the CM comprises the amino acid sequence RPSPMWAY (SEQ ID NO: 21). In some embodiments, the CM comprises the amino acid sequence WATPRPMR (SEQ ID NO: 22). In some embodiments, the CM comprises the amino acid sequence FRLLDWQW (SEQ ID NO: 23). In some embodiments, the CM comprises the amino acid sequence LKAAPRWA (SEQ ID NO: 24). In some embodiments, the CM comprises the amino acid sequence GPSHLVLT (SEQ ID NO: 25). In some embodiments, the CM comprises the amino acid sequence LPGGLSPW (SEQ ID NO: 26). In some embodiments, the CM comprises the amino acid sequence MGLFSEAG (SEQ ID NO: 27).
- the CM comprises the amino acid sequence SPLPLRVP (SEQ ID NO: 28). In some embodiments, the CM comprises the amino acid sequence RMHLRSLG (SEQ ID NO: 29). In some embodiments, the CM comprises the amino acid sequence LAAPLGLL (SEQ ID NO: 30). In some embodiments, the CM comprises the amino acid sequence AVGLLAPP (SEQ ID NO: 31). In some embodiments, the CM comprises the amino acid sequence LLAPSHRA (SEQ ID NO: 32). In some embodiments, the CM comprises the amino acid sequence PAGLWLDP (SEQ ID NO: 33). In some embodiments, the CM comprises the amino acid sequence ISSGLSS (SEQ ID NO: 159).
- the CM is a substrate for at least one matrix metalloprotease (MMP) and includes a motif sequence that is recognized by MMP9. In some embodiments, the CM is a substrate for at least one MMP and includes a motif sequence that is recognized by MMP 14.
- MMP matrix metalloprotease
- the CM is a substrate for at least one MMP
- CM polypeptide and/or the CM portion of any polypeptide that comprises the CM comprises a polypeptide having a length less than 50 amino acids, less than 40 amino acids, less than 30 amino acids, less than 25 amino acids, less than 20 amino acids, less than 19 amino acids, less than 18 amino acids, less than 17 amino acids, less than 16 amino acids, less than 15 amino acids long, less than 14 amino acids, less than 13 amino acids, less than 12 amino acids, less than 11 amino acids, or less than 10 amino acids long.
- the CM is a substrate for at least one MMP and comprises a polypeptide sequence that is not substantially identical to any human polypeptide sequence that is naturally cleaved by the same MMP protease. In some embodiments, the CM is a substrate for at least one MMP and comprises a polypeptide sequence that is no more than 90% or more identical to any human polypeptide sequence that is naturally cleaved by the same MMP protease.
- the motif sequence is a substrate for at least MMP and includes a core CM consensus sequence shown in Tables 8A-8M below. In some embodiments, the motif sequence includes a subgenus, i.e., a subset, of the core CM consensus sequence shown in Tables 8A-8M below.
- the motif sequence is a substrate for at least MMP9 and includes a core CM consensus sequence shown in Tables 8A-8D.
- the motif sequence is a substrate for at least MMP9 and includes a subgenus, i.e., a subset, of the core CM consensus sequence shown in Tables 8A-8D below.
- the motif sequence is a substrate for at least MMP 14 and includes a core CM consensus sequence shown in Tables 8E-8M.
- the motif sequence is a substrate for at least MMP 14 and includes a subgenus, i.e., a subset, of the core CM consensus sequence shown in Tables 8E-8M below.
- Table 8A MMP9 Cleavable Core CM Consensus Sequence 1
- X 34 is C, G, H, L, Q, S, T, W, NO: 326), wherein X 32 is W; X33 is D; X 34 is H, Q, or W;
- X 36 is E, G, I, L, N, P, R, or V; or V; and X39 is G, L, or S.
- X 37 is G, L, P, R, S, or V; Subgenus 2.3: X32X33X34X35X36X37X38X39 (SEQ ID NO:
- X 3 8 is A, I, L, M, T, or V; and NO: 327), wherein X 32 is W; X33 is D; X 34 is H, Q, or W;
- X 39 is A, G, L, P, Q, R, S, or V.
- X35 is P;
- X36 is I or R;
- X 37 is S;
- X38 is L, M, or V; and
- X39 is L.
- X 52 is D, G, H, L, P, Q, S, or Y
- X 53 is D, W, or Y
- X 54 is H, L, or R
- X 55 is H, L, M, P, or Y
- X 56 Is E
- X52X53X54X55X56X57X58X59 F, G, M, R, or W;
- X 57 is A, L, M, N, P, or R;
- X 58 is G, L, P, (SEQ ID NO: 340), wherein R, or S; and
- X 59 is G, I, P, S, T, or Y.
- X 52 is D, G, H, L, N, P, Q, Subgenus 4.2: X52X53X54X55X56X57X58X59 (SEQ ID NO:
- W, or Y; L, or P; and X59 is G, I, S, or T.
- X 54 is D, H, L, P, Q, R, S, or Subgenus 4.3: X52X53X54X55X56X57X58X59 (SEQ ID NO:
- X55 is D, F, H, I, L, M, P, S, H, L, or Y; X 56 Is G or W; X57 is P; X58 is L or P; and X59 is or Y; G, I, S, or T.
- X 56 is A, C, E, F, G, K, M, Subgenus 4.4: X52X53X54X55X56X57X58X59 (SEQ ID NO:
- X 52 is H; X53 is W; X 54 is H or L; X 55 is L X 57 is A, G, K L, M, N, P, or Y; X 56 Is G; X57 is P; X58 is L or P; and X59 is G, I, S, or
- X 58 is A, F, G, H, L, P, R, S, Subgenus 4.5: X52X53X54X55X56X57X58X59 (SEQ ID NO:
- X 52 is H; X 53 is W; X 54 is H or L X 55 is L X 59 is A, G, H, I, N, P, S, T, or Y X 56 Is G; X57 is P; X58 is P; and X59 is T.
- X 52 is D, G, S, or Y; X53 is W; X 54 is L or P; X 55 is D or Y; X 56 is C, E, G, or W; X 57 is M or P; X 58 is G, R, or S; and X59 is H, I, or Y.
- Core CM Consensus 4 Subgenus of Core CM Consensus 4
- X 52 is D, G, or S; X53 is W; X 54 is L; X 55 is Y; X56 is E or W; X57 is M or P; X 58 is G or S; and X59 is I or Y.
- X 62 is A, G, I, P, Q, S, T, or V
- X 63 is A, L, Q, S, or V
- ⁇ 4 is A, E, L, R, or S
- X65 is D or G
- ⁇ is I or L
- X 67 is E, I, L, M, Q, R, or Y
- X 68 is F, H, L, M, R, or S;
- X62X63X64X65X66X67X68X69 and X 69 is A, G, H, L, N, P, Q, or S.
- X 62 is A, I, G, L, M, P, Q, S, NO: 354), wherein X 62 is A, I, S or T; X 63 is L, Q, S, or V;
- X 6 4 is A, L, R, or S
- X65 is G
- ⁇ is I or L
- X 6 7 is E, L, R, or X 63 is A, D, L, P, Q, S, T, V, Y
- X68 is F, H, L, R, or S
- X69 is H, L, P, or S.
- X 64 is A, C, E, F, G, H, K, NO: 355), wherein X 62 is A, I, S or T; X 63 is L, S, or V; X
- L, P, Q, R, S, or V is A, R or S; X65 is G; ⁇ is L; X 6 7 is E, L or R; X 6 8 is F, H, X 65 is D, E, G, S, or V; or S; and X69 is L, P, or S.
- X 6 6 is A, I, L, M, or V; Subgenus 5.4: X 62 X 6 3X6 4 X65X66X67X68X69 (SEQ ID NO: 0
- X 67 is C, E, G, I, K, L, M, NO: 356), wherein X 62 is A, I, S or T; X 63 is L, S, or V; X
- N, Q, R, or Y; is R or S;
- X65 is G;
- ⁇ is L;
- X 6 7 is L or R;
- X 6 8 is F, H, or S;
- X 68 is A, F, H, I, L, M, N, P, and X69 is P or S.
- X 69 is A, C, G, H, I, L, N, P, NO: 357), wherein X 62 is A, I, S or T; X 63 is L, S, or V; X Q, R, S, T, V, or W. is R or S; X65 is G; ⁇ is L; X 6 7 is L or R; X 6 8 is S; and X69 is P or S.
- X 62 is A, G, I, M, P, S, T, or V
- X 63 is L, Q, S, or V
- X 64 is A, C, F, K, L, Q, R or S
- X 65 is D, G, S, or V
- X 66 is L or M
- X 67 is G, I, L, M, N, Q, or R
- X 68 is I, N, P, or S
- X 6 9 is A, H, I, N, Q, or S.
- X 6 2 is A, I, or S
- X 6 3 is L, Q, S, or V
- X 64 is L, R or S
- X65 is G
- ⁇ is L
- X 6 7 is L, M, or R
- X 6 8 is S
- X 6 9 is A, H, N, Q, or S.
- X 62 is A or S
- X63 is L or V
- X64 is L or S
- X65 is G; X66 is L; X 6 7 is L or R; X 6 8 is S; and X69 is H, or S.
- X 6 2 is A or S; X63 is L or V; X64 is S; X65 is G; X66 is L; X 6 7 is L or R; X 6 8 is S; and X69 is H, or S.
- X 74 is A, D, E, K, N, P Q, S, T, Subgenus 6.2: X72X73X74X75X76X77X78X79 (SEQ ID or Y; NO: 373), wherein X 72 is G, L or R, or S; X73 is A or L;
- X 75 is A, E, G, H, K, L, N, P, R, X 74 is A, E, N, Q, or S; X 75 is A, E, N, S, or T; X 76 is L S, or T; or M; X77 is L or R; X 78 is A, L, or T; and X79 is F, G, L,
- X 76 is I, K, L, M, N, R, T, V or R, or S.
- X77 is A, D, E, I, K, L, P, Q, R, NO: 374), wherein X 72 is L; X 73 is A or L; X 74 is E, N, Q,
- X75 is A or S
- X76 is L or M
- X 77 is R
- X78 is A or T
- X 78 is A, C, D, E, G, I, L, M, Q, and X79 is F, L, or R.
- Subgenus 6.4 X72X73X74X75X76X77X78X79 (SEQ ID X 79 is A, F, G, H, I, L, P, Q, R, NO: 375), wherein X 72 is L; X 73 is A or L; X 74 is E, N, Q,
- X79 is L or R.
- X 92 is F, G, L, S, T, or V; X93 is P; X94 is A, E, H, K, N, (SEQ ID NO: 410),
- X 95 is A, G, H, N, P, or S
- X 96 is I, L, M, or V
- X 97 is F, I, L, R, S, T, V, or Y; and X 98 is A, F, L, R, T, V, or Y.
- X 92 is A, D, F, G, H, I,
- X 92 is F, L, or S
- X93 is P
- X94 is A, K, Q, R, or S
- X95 is T, V, or W;
- X 96 is I, L, M, or V;
- X97 is F, L, R, S, T, V, or
- Y X93 is A, P, R, or T;
- X98 is F, L, T, or V.
- X 94 is A, E, F, G, H, I,
- X 92 is F, L, or S; X93 is P; X94 is A, Q, or S; X95 is G or or V;
- X96 is I, L, or M
- X 97 is L, S, or V
- X98 is F, L, or T.
- X 95 is A, D, E, G, H, K,
- Subgenus 8.5 X92X93X94X95X96X97X98 (SEQ ID NO: 415), M, N, P, R, S, or T;
- X 92 is F, L, or S; X93 is P; X94 is A, Q or S; X95 is G; X96
- X 96 is C, F, H, I, L, M,
- X 97 is L or V; and X98 is L.
- X 97 is A, C, F, G, H, I,
- X 92 is F, L, or S; X93 is P; X94 is A or S; X95 is G; X96 is K, L, M, R, S, T, V,
- X 98 is A, D, E, F, G, H,
- X 92 is F, G, L, M, P, S, V, or W;
- X93 is P;
- X 94 is A, N, Q, I, K, L, M, N, P, Q,
- X 95 is A, D, G, H, M, N, P, or S
- X 96 is F, I, L, M, or V
- X 98 is A, G, I, L, M, N, P, Q, R, S, T, or Y.
- Subgenus 8.8 X92X93X94X95X96X97X98 (SEQ ID NO: 418), wherein X 92 is L, S, or V; X93 is P; X94 is A, N, Q, or S; X95 is H, N, P, or S; X96 is F, I, L, or M; X 97 is I, L, S, or V; and X98 is A, L, or Q.
- Core CM Consensus 8 Subgenus of Core CM Consensus 8
- X92 93 94 95 96 97 98 (SEQ ID NO: 419), wherein X 92 is L; X 93 is P; X94 is A, N, Q, or S; X95 is H; X 96 is I or L; X97 is V; and X98 is L.
- Extended Core CM Subgenus of Extended Core CM
- Consensus 8A Consensus 8A
- X 92 is F, L, or S
- X93 is P
- X94 is A or S
- X 95 is G
- X96 is I, L, or M
- X 97 is L or V
- X98 is L
- X99 is R.
- X 92 is F, G, L, M, P, S, V, or W;
- X93 is P;
- X 94 is A, N, Q, or S;
- X 95 is A, D, G, H, M, N, P, or S;
- X 96 is F,
- X 97 is A, I, L, M, S, or V
- X 98 is A, G, I, L, M, N,
- X 99 is A, F, H, I, L, Q, R, T, V, W, or
- X 92 is L, S, or V
- X93 is P
- X 94 is A, N, Q, or S
- X95 is H, N, P, or S
- X 96 is F, I, L, or M
- X 97 is I, L, S, or V
- X98 is A, L, or Q
- X99 is L, T, V, or Y.
- X102X103X104X105X106X107X108X109 Sub genus 9.1 : X102X103X104X105X106X107X108X109 (SEQ (SEQ ID NO: 425), wherein ID NO: 426), wherein X 102 is A, D, F, G, I, R, or S; X103 X 102 is A, D, F, G, H, I, L, M, P, is D, E, L, M, P, R, S, T, V, or Y; X104 is A, H, P, or S;
- X105 is A, D, E, H, L, M, N, R, T, or V
- Xi 06 is A, G, or X103 is A, D, E, L, M, P, Q, R, S, R
- X107 is F, L, M, S, V, or W
- Xi 08 is A, E, H, L, M, R,
- T, V, or Y; S, or V; and X109 is A, G, L, P, R, S, or V.
- X104 is A, G, H, L, N, P, R, S, T, Subgenus 9.2: X102X103X104X105X106X107X108X109 (SEQ or V; ID NO: 427), wherein X 102 is F, G, I, R, or S; X103 is L,
- X 105 is A, D, E, H, L, M, N, P, Q, P, R, or V;
- X104 is A or H;
- X105 is A, D, or R;
- X106 is A
- Core CM Consensus 9 Subgenus of Core CM Consensus 9
- Xio7 is C, F, L, M, S, V, W, or Y; Subgenus 9.3 : X102X103X104X105X106X107X108X109 (SEQ X 108 is A, E, F, G, H, I, L, M, N, ID NO: 428), wherein X 102 is G, R or S; X103 is R or V;
- X104 is A or H; X105 is A, D, or R; Xi 0 6 is A or G; X107 is Xio9 is A, E, G, L, P, R, S, or V. L or V; Xios is H or R; and X109 is A, L, S, or V.
- Subgenus 9.4 X102X103X104X105X106X107X108X109 (SEQ ID NO: 429), wherein Xi 02 is R; X103 is R; Xio4 is A or H; X105 is A or D; Xi 0 6 is G; X107 is L or V; Xios is R; and X109 is A, S, or V.
- Subgenus 9.5 X102X103X104X105X106X107X108X109 (SEQ ID NO: 430), wherein X 102 is D, F, G, I, L, R, S, or T; X103 is E, L, M, R, S, T, or V; X104 is H or N; Xi 05 is A, D, L, M, R, or T; Xi 06 is A, G, R, or T; Xi 07 is C, L, M, S, V, or W; Xios is A, E, F, G, L, R, S, or W; and X109 is A, G, L, P, R, S, or V.
- Subgenus 9.6 X102X103X104X105X106X107X108X109 (SEQ ID NO: 431), wherein Xi 02 is F, I, R, or S; X103 is E, L, R, or V; X104 is H; X105 is D, M, R, or T; Xi 0 6 is A or G; X107 is L, M, S, or V; Xios is E, R, or S; and X109 is A, P, S, or V.
- Subgenus 9.7 X102X103X104X105X106X107X108X109 (SEQ ID NO: 432), wherein X102 is I or R; X103 is E, R, or V; X104 is H; X105 is D, M, R, or T; Xi 0 6 is A or G; X107 is L or V; Xios is R or S; and X109 is A, P, S, or V.
- Subgenus 9.8 X102X103X104X105X106X107X108X109 (SEQ ID NO: 433), wherein X102 is I or R; X103 is R; X104 is H; X105 is D; Xi 0 6 is A or G; X107 is L or V; Xios is R or S; and X109 is A or S.
- Core CM Consensus 10 Subgenus of Core CM Consensus 10
- Subgenus 10.7 X 112 X 113 X 114 Xn 5 Xii6Xii7Xii8Xii9 (SEQ ID NO: 443), wherein X m is A; X n3 is Y; X m is N or S; Xii5 is G or L; X n e is L; Xn 7 is S; Xns is R; and Xng is L or V.
- Subgenus 10.8 X 112 X 113 X 114 Xn 5 Xii6Xii7Xii8Xii9 (SEQ ID NO: 444), wherein X 112 is A, D, G, I, L, N, P, S, T, V, W, or Y; X 113 is A, D, G, L, M, Q, S, or V; X m is H, K, N, P, Q, R, S, or T; X 115 is H, I, L, R, or V; X 116 is I, L, P, or V; Xm is A, D, E, G, I, K, M, N, S, or T; X 118 is D, F, L, M, Q, R, or V; and X 119 is A, F, I, L, or V.
- Subgenus 10.9 X 112 X 113 X 114 Xn 5 Xii6Xii7Xii8Xii9 (SEQ ID NO: 445), wherein X 112 is A, I, T, or V; X m is A, D, G, L, M, Q, S, or V; X 114 is H, K, N, S, or T; X U5 is H, I, L, or V; Xue is L; Xn 7 is A, G, K, or S; Xns is L, M, Q, R, or V; and Xng is A, L, or V.
- Subgenus 10.10 ⁇ 112 ⁇ 113 ⁇ 114 ⁇ 115 ⁇ 6 ⁇ 7 ⁇ 8 ⁇ 9 (SEQ ID NO: 446), wherein X 112 is A or I; X 113 is A, L, or Q; Xii4 is N, S, or T; Xns is L or V; Xue is L; Xn 7 is A, G, K, or S; X 118 is M, R, or V; and X U9 is L or V.
- Subgenus 10.11 XmXmXiMXiisXiieXinXmXiig (SEQ ID NO: 447), wherein X m is A or I; X 113 is A, L, or Q; Xii4 is N or S; Xns is L or V; Xue is L; Xn 7 is A or S; Xns is M or R; and Xng is L or V.
- Subgenus 10.12 XmXmXiMXnsXiieXinXiisXiig (SEQ ID NO: 448), wherein X 112 is I; X n3 is A, L, or Q; Xii4 is N; Xns is L or V; Xue is L; Xn 7 is A or S; Xns is M or R; and X119 is L or V.
- X 6 is I, L, M, Q, T, V,
- Subgenus 12.4 X 2 X 3 X 4 X5X6X7X8X9 (SEQ ID NO: 462), wherein
- Subgenus 12.5 X2X3X4X5X6X7X8X9 (SEQ ID NO: 463), wherein X 8 is A, D, E, F, G, I,
- X 2 is A, E, G, H, I, L, M, P, or S
- X 3 is A, E, G, H, I, K, L, P, Q,
- X 4 is A, G, N, R, S, T, or V
- X 5 is A, G, H
- X 6 is I, L, M, or Q
- X 7 is A, D, G, K, L, N, Q, R, S, or V
- X 8 is A, D, E, F, G, I, K, L, M, P, R, V, W, or Y
- X 9 is A, F, G, M, P, Q, R, S, V, or Y.
- X2X3X4X5X6X7X8X9 (SEQ ID NO: 465), wherein X 2 is A, P, or S; X 3 is A, H, Q, S, or V; X 4 is G, N, or S; X 5 is L, P, or S; X 6 is L; X 7 is A, D, G, R, or S; X 8 is F, I, L, M, or P; and X 9 is F, P, Q, or R.
- Subgenus 12.8 X2X3X4X5X6X7X8X9 (SEQ ID NO: 466), wherein X 2 is A, P, or S; X 3 is H, S, or V; X 4 is G, N, or S; X 5 is L, P, or S; X 6 is L; X 7 is A, G, R, or S; X 8 is F, I, M, or P; and X 9 is P or R.
- Subgenus 12.9 X2X3X4X5X6X7X8X9 (SEQ ID NO: 467), wherein X 2 is A, P, or S; X 3 is S or V; X 4 is G, N, or S; X 5 is L; X 6 is L; X 7 is A, G or R; X 8 is F, I, or P; and X 9 is P.
- Subgenus 12.10 X2X3X4X5X6X7X8X9 (SEQ ID NO: 468), wherein X 2 is A, P, or S; X 3 is S or V; X 4 is G, N, or S; X5 is L; Xe is L; X 7 is A or R; X 8 is F or P; and X 9 is P.
- Subgenus 12.1 1 X2X3X4X5X6X7X8X9 (SEQ ID NO: 469), wherein X 2 is A or P; X 3 is S; X 4 is G or N; X5 is L; X 6 is L; X 7 is R; X 8 is F; and X 9 is P.
- Table 8M MMP14 Cleavable Core CM Consensus Sequence 13
- Subgenus 13 X12X13 14 15 16 17 18 19 (SEQ ID O:481), wherein X 12 is L, M, or V; X 13 is A or L; X 14 is A, L, Q, or S; Xi5 is G, P, or T; X 16 is A, S, or Y; X 17 is H or P; X 18 is D or G; and X 19 is A, G or S.
- X 12 is L or M
- X 13 is A or L
- X 14 is L
- X 15 is G or P
- X 16 is A or S
- X 17 is H
- X 18 is G
- X19 is A or G.
- the CM comprises an amino acid sequence selected from the group consisting of SEQ ID NOs: 352, 371, 394, 410, 425, 436, 453, 458, 473, 485, and 486.
- the CM comprises an amino acid sequence selected from the group consisting of SEQ ID NO: 353-363, 372-375, 376-378, 395-401, 41 1-419, 426-433, 437-449, 454-456, 459-469, 475-482, and 487-495.
- the CM comprises an amino acid sequence selected from the group consisting of SEQ ID NO: 353-363.
- the CM comprises an amino acid sequence selected from the group consisting of 372-375.
- the CM comprises an amino acid sequence selected from the group consisting of 376-378. In some embodiments, the CM comprises an amino acid sequence selected from the group consisting of 395-401. In some embodiments, the CM comprises an amino acid sequence selected from the group consisting of 411-419. In some embodiments, the CM comprises an amino acid sequence selected from the group consisting of 426-433. In some embodiments, the CM comprises an amino acid sequence selected from the group consisting of 437-449. In some embodiments, the CM comprises an amino acid sequence selected from the group consisting of 454-456. In some embodiments, the CM comprises an amino acid sequence selected from the group consisting of 459-469. In some embodiments, the CM comprises an amino acid sequence selected from the group consisting of 475-482. In some embodiments, the CM comprises an amino acid sequence selected from the group consisting of 487-495.
- the CM comprises an amino sequence selected from the group consisting of SEQ ID NOs: 317, 324, 329 and 340. In some embodiments, the CM comprises an amino acid sequence selected from the group consisting of SEQ ID NOs: 318-323, 325-327, 330-335, and 341-347. In some embodiments, the CM comprises an amino acid sequence selected from the group consisting of SEQ ID NOs: 318-323. In some embodiments, the CM comprises an amino acid sequence selected from the group consisting of SEQ ID NOs: 325-327. In some embodiments, the CM comprises an amino acid sequence selected from the group consisting of SEQ ID NOs: 330-335. In some embodiments, the CM comprises an amino acid sequence selected from the group consisting of SEQ ID NOs: 341-347.
- the CM comprises a core CM consensus 1 sequence comprising the amino acid sequence RPSPMWAY (SEQ ID NO: 21).
- the CM comprises a core CM consensus 2 sequence comprising the amino acid sequence WDHPISLL (SEQ ID NO: 328).
- the CM comprises a core CM consensus 2 sequence comprising the amino acid sequence WATPRPMR (SEQ ID NO: 22).
- the CM comprises a core CM consensus 3 sequence comprising the amino acid sequence LTFPTYIF (SEQ ID NO: 336). In some embodiments, the CM comprises a core CM consensus 3 sequence comprising the amino acid sequence MTFPTYIF (SEQ ID NO: 337). In some embodiments, the CM comprises a core CM consensus 3 sequence comprising the amino acid sequence LTFPTYWF (SEQ ID NO: 338). In some embodiments, the CM comprises a core CM consensus 3 sequence comprising the amino acid sequence MTFPTYWF (SEQ ID NO: 339). In some embodiments, the CM comprises a core CM consensus 3 sequence comprising the amino acid sequence
- the CM comprises a core CM consensus 4 sequence comprising the amino acid sequence DWLYWMGI (SEQ ID NO: 348). In some embodiments, the CM comprises a core CM consensus 4 sequence comprising the amino acid sequence DWLYWPGI (SEQ ID NO: 19). In some embodiments, the CM comprises a core CM consensus 4 sequence comprising the amino acid sequence DWLYWMSI (SEQ ID NO: 349). In some embodiments, the CM comprises a core CM consensus 4 sequence comprising the amino acid sequence DWLYWPSI (SEQ ID NO: 350). In some
- the CM comprises a core CM consensus 4 sequence comprising the amino acid sequence HWHLGPPT (SEQ ID NO: 351).
- the CM comprises a core CM consensus 5 sequence comprising the amino acid sequence ISSGLLSS (SEQ ID NO: 14). In some embodiments, the CM comprises a core CM consensus 5 sequence comprising the amino acid sequence SVSGLLSH (SEQ ID NO: 364). In some embodiments, the CM comprises a core CM consensus 5 sequence comprising the amino acid sequence SVSGLLSS (SEQ ID NO: 365). In some embodiments, the CM comprises a core CM consensus 5 sequence comprising the amino acid sequence SVSGLRSH (SEQ ID NO: 366). In some embodiments, the CM comprises a core CM consensus 5 sequence comprising the amino acid sequence
- the CM comprises a core CM consensus 5 sequence comprising the amino acid sequence TLSGLRSP (SEQ ID NO: 368). In some embodiments, the CM comprises a core CM consensus 5 sequence comprising the amino acid sequence TSSGLRSP (SEQ ID NO: 369). In some embodiments, the CM comprises a core CM consensus 5 sequence comprising the amino acid sequence
- TVSGLRSP (SEQ ID NO: 370).
- the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence AFQALRM (SEQ ID NO: 379).
- the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence AHQALRM (SEQ ID NO: 380). In some embodiments, the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence ANQALRM (SEQ ID NO: 381). In some embodiments, the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence ANQALRMA (SEQ ID NO: 382). In some embodiments, the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence LLEALRAL (SEQ ID NO: 383). In some embodiments, the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence LLNALRAL (SEQ ID NO: 384). In some embodiments, the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence LLQALRAL (SEQ ID NO: 385). In some embodiments, the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence LLQALRAL (SEQ ID NO: 385). In some
- the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence LLSALRAL (SEQ ID NO: 386). In some embodiments, the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence LLESLRAL (SEQ ID NO: 387). In some embodiments, the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence LLNSLRAL (SEQ ID NO: 388). In some
- the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence LLQSLRAL (SEQ ID NO: 389). In some embodiments, the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence LLSSLRAL (SEQ ID NO: 390). In some embodiments, the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence QFQALRM (SEQ ID NO: 391). In some
- the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence QHQALRM (SEQ ID NO: 392). In some embodiments, the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence QNQALRM (SEQ ID NO: 393). In some embodiments, the CM comprises a core CM consensus 6 sequence comprising the amino acid sequence QNQALRMA (SEQ ID NO: 15).
- the CM comprises a core CM consensus 7 sequence comprising the amino acid sequence LKAAPRWA (SEQ ID NO: 24).
- the CM comprises a core CM consensus 7 sequence comprising the amino acid sequence LKAAPVWA (SEQ ID NO: 403). In some embodiments, the CM comprises a core CM consensus 7 sequence comprising the amino acid sequence LKAAPRWF (SEQ ID NO: 404). In some embodiments, the CM comprises a core CM consensus 7 sequence comprising the amino acid sequence LKAAPVWF (SEQ ID NO: 405). In some
- the CM comprises a core CM consensus 7 sequence comprising the amino acid sequence LYAAPRWA (SEQ ID NO: 406). In some embodiments, the CM comprises a core CM consensus 7 sequence comprising the amino acid sequence LYAAPVWA (SEQ ID NO: 407). In some embodiments, the CM comprises a core CM consensus 7 sequence comprising the amino acid sequence LYAAPRWF (SEQ ID NO: 408). In some
- the CM comprises a core CM consensus 7 sequence comprising the amino acid sequence LYAAPVWF (SEQ ID NO: 409).
- the CM comprises a core CM consensus 8 sequence comprising the amino acid sequence GPSHLVLT (SEQ ID NO: 25). In some embodiments, the CM comprises a core CM consensus 8 sequence comprising the amino acid sequence LPAGLLL (SEQ ID NO: 402). In some embodiments, the CM comprises a core CM consensus 8 sequence comprising the amino acid sequence LPAGLLLR (SEQ ID NO: 420). In some embodiments, the CM comprises a core CM consensus 8 sequence comprising the amino acid sequence LPAHLVLL (SEQ ID NO: 421). In some embodiments, the CM comprises a core CM consensus 8 sequence comprising the amino acid sequence
- the CM comprises a core CM consensus 8 sequence comprising the amino acid sequence LPAHLVLV (SEQ ID NO: 422).
- the CM comprises a core CM consensus 8 sequence comprising the amino acid sequence LPSHLVLV (SEQ ID NO: 424).
- the CM comprises a core CM consensus 9 sequence comprising the amino acid sequence RMHLRSLG (SEQ ID NO: 29).
- the CM comprises a core CM consensus 9 sequence comprising the amino acid sequence RRHDGLRA (SEQ ID NO: 434). In some embodiments, the CM comprises a core CM consensus 9 sequence comprising the amino acid sequence RRHDGLRS (SEQ ID NO: 435).
- the CM comprises a core CM consensus 10 sequence comprising the amino acid sequence AQNLLGMV (SEQ ID NO: 16).
- the CM comprises a core CM consensus 10 sequence comprising the amino acid sequence IANLLSMV (SEQ ID NO: 450). In some embodiments, the CM comprises a core CM consensus 10 sequence comprising the amino acid sequence ILNLLSMV (SEQ ID NO: 451). In some embodiments, the CM comprises a core CM consensus 10 sequence comprising the amino acid sequence IQNLLSMV (SEQ ID NO: 452).
- the CM comprises a core CM consensus 1 1 sequence comprising the amino acid sequence PAGLWLDP (SEQ ID NO: 33).
- the CM comprises a core CM consensus 1 1 sequence comprising the amino acid sequence PASLWYTQ (SEQ ID NO: 457).
- the CM comprises a core CM consensus 12 sequence comprising the amino acid sequence ALGLLRLP (SEQ ID NO: 470).
- the CM comprises a core CM consensus 12 sequence comprising the amino acid sequence ALGLLSLP (SEQ ID NO: 471). In some embodiments, the CM comprises a core CM consensus 12 sequence comprising the amino acid sequence ASGLLRFP (SEQ ID NO: 472). In some embodiments, the CM comprises a core CM consensus 12 sequence comprising the amino acid sequence AVGLLAPP (SEQ ID NO: 31).
- the CM comprises a core CM consensus 13 sequence comprising the amino acid sequence LAAPLGLL (SEQ ID NO: 30). In some embodiments, the CM comprises a core CM consensus 13 sequence comprising the amino acid sequence LLAPSHRA (SEQ ID NO: 32).
- the CM comprises a core CM consensus 13 sequence comprising the amino acid sequence LLLPAHGG (SEQ ID NO: 474).
- the CM comprises a core CM consensus 13 sequence comprising the amino acid sequence LLLPLLGS (SEQ ID NO: 483).
- the CM is a substrate for at least two proteases.
- at least one protease is an MMP and at least one protease is selected from the group consisting of those shown in Table 7.
- Table 7 Exemplary Proteases and/or Enzymes
- the antibody includes at least a first CM and a second
- the first CM and the second CM are each polypeptides of no more than 15 amino acids long.
- the first CM and the second CM in the antibody in the uncleaved state have the structural arrangement from N-terminus to C- terminus as follows: Agent-CM1-CM2-AB, AB-CM2-CM1 -Agent, Agent-CM2-CM 1 -AB, or AB-CM1-CM2 -Agent.
- the activatable antibody includes a linking peptide between the agent and CM1.
- the activatable antibody includes a linking peptide between CM1 and CM2.
- the activatable antibody includes a linking peptide between CM2 and AB.
- the activatable antibody includes a linking peptide between the agent and CM1 and a linking peptide between CM2 and AB. In some embodiments, the activatable antibody includes a linking peptide between agent and CM1 and a linking peptide between CM1 and CM2. In some embodiments, the activatable antibody includes a linking peptide between CM1 and CM2 and a linking peptide between CM2 and AB. In some embodiments, the activatable antibody includes a linking peptide between agent and CM1, a linking peptide between CM1 and CM2, and a linking peptide between CM2 and AB.
- the activatable antibody includes at least a first CM that includes a substrate for at least one matrix metalloprotease (MMP) and a second CM that includes a substrate sequence.
- CM2 matrix metalloprotease
- Exemplary substrates for the second CM (CM2) include but are not limited to substrates cleavable by one or more of the following enzymes or proteases listed in Table 7.
- the CM2 is selected for use with a specific protease.
- the CM2 is a substrate for at least one protease selected from the group consisting of a matrix metalloprotease (MMP), a neutrophil elastase, u-type plasminogen activator (uPA, also referred to as urokinase), legumain, matriptase (also referred to herein as MT-SPl or MTSP l), thrombin, a cysteine protease such as a cathepsin, ADAM 17, BMP-1, HtrAl, and a TMPRSS such as TMPRSS3 or TMPRSS4.
- MMP matrix metalloprotease
- uPA u-type plasminogen activator
- legumain legumain
- matriptase also referred to herein as MT-SPl or MTSP l
- thrombin a cysteine protease such as a cathepsin, ADAM 17, BMP-1, HtrAl
- the CM2 is a substrate for a neutrophil elastase. In some embodiments, the CM2 is a substrate for uPA. In some embodiments, the CM2 is a substrate for legumain. In some embodiments, the CM2 is a substrate for matriptase. In some embodiments, the CM2 is a substrate for thrombin. In some embodiments, the CM2 is a substrate for a cysteine protease. In some embodiments, the CM2 is a substrate for a cathepsin. In some embodiments, the CM2 is a substrate for ADAM17. In some embodiments, the CM2 is a substrate for BMP-1.
- the CM2 is a substrate for HtrAl. In some embodiments, the CM2 is a substrate for a TMPRSS. In some embodiments, the CM2 is a substrate for TMPRSS3. In some embodiments, the CM2 is a substrate for TMPRSS4.
- suitable CM2 are cleaved by at least one protease and include the sequence TGRGPSWV (SEQ ID NO: 34); SARGPSRW (SEQ ID NO: 35);
- TARGPSFK (SEQ ID NO: 36); LSGRSDNH (SEQ ID NO: 37); GGWHTGRN (SEQ ID NO: 38); HTGRSGAL (SEQ ID NO: 39); PLTGRSGG (SEQ ID NO: 40); AARGPAIH (SEQ ID NO: 41); RGPAFNPM (SEQ ID NO: 42); SSRGPAYL (SEQ ID NO: 43);
- RGPATPIM SEQ ID NO: 44
- RGPA SEQ ID NO: 45
- GGQPSGMWGW SEQ ID NO: 46
- FPRPLGITGL SEQ ID NO: 47
- VHMPLGFLGP SEQ ID NO: 48
- SPLTGRSG SEQ ID NO: 49
- SAGFSLPA SEQ ID NO: 126
- LAPLGLQRR SEQ ID NO: 50
- SGGPLGVR SEQ ID NO: 51
- PLGL SEQ ID NO: 52
- GPRSFGL SEQ ID NO: 315
- GPRSFG SEQ ID NO: 316
- the CM2 comprises the amino acid sequence
- the CM2 comprises the amino acid sequence SARGPSRW (SEQ ID NO: 35). In some embodiments, the CM2 comprises the amino acid sequence TARGPSFK (SEQ ID NO: 36). In some embodiments, the CM2 comprises the amino acid sequence LSGRSDNH (SEQ ID NO: 37). In some embodiments, the CM2 comprises the amino acid sequence GGWHTGRN (SEQ ID NO: 38). In some embodiments, the CM2 comprises the amino acid sequence HTGRSGAL (SEQ ID NO: 39). In some embodiments, the CM2 comprises the amino acid sequence PLTGRSGG (SEQ ID NO: 40).
- the CM2 comprises the amino acid sequence AARGPAIH (SEQ ID NO: 41). In some embodiments, the CM2 comprises the amino acid sequence RGPAFNPM (SEQ ID NO: 42). In some embodiments, the CM2 comprises the amino acid sequence SSRGPAYL (SEQ ID NO: 43). In some embodiments, the CM2 comprises the amino acid sequence RGPATPIM (SEQ ID NO: 44). In some embodiments, the CM2 comprises the amino acid sequence RGPA (SEQ ID NO: 45). In some embodiments, the CM2 comprises the amino acid sequence GGQPSGMWGW (SEQ ID NO: 46). In some embodiments, the CM2 comprises the amino acid sequence FPRPLGITGL (SEQ ID NO: 47). In some embodiments, the CM2 comprises the amino acid sequence
- the CM2 comprises the amino acid sequence SPLTGRSG (SEQ ID NO: 49). In some embodiments, the CM2 comprises the amino acid sequence LAPLGLQRR (SEQ ID NO: 50). In some embodiments, the CM2 comprises the amino acid sequence SGGPLGVR (SEQ ID NO: 51). In some embodiments, the CM2 comprises the amino acid sequence PLGL (SEQ ID NO: 52). In some embodiments,
- the CM2 comprises the amino acid sequence GPRSFGL (SEQ ID NO: 315). In some embodiments, the CM2 comprises the amino acid sequence GPRSFG (SEQ ID NO: 316).
- the CM2 is a substrate for at least one MMP. In some embodiments, the CM2 is a substrate for at least one MMP listed in the Table 7. In some embodiments, the CM2 is a substrate for MMP9. In some embodiments, the CM2 is a substrate for MMP 14. In some embodiments, CMl is substrate for a first MMP, and CM2 is a substrate for a second MMP, where the first MMP and the second MMP are different MMPs. In some embodiments, CMl is a first substrate sequence for a MMP, and CM2 is a second substrate for the same MMP, where the CMl and CM2 have different substrate sequences.
- the CM2 is a substrate for two or more MMPs. In some embodiments, the CM2 is a substrate for at least MMP9 or MMP 14. In some embodiments, the CM2 is a substrate for two or more MMPs. In some embodiments, the CM2 is a substrate for at least MMP9 and MMP 14. In some embodiments, CMl and CM2 are both substrates for MMP9. In some embodiments, CMl and CM2 are both substrates for MMP 14. In some embodiments, CMl is a substrate for MMP9 and CM2 is a substrate for MMP14. In some embodiments, CMl is a substrate for MMP 14 and CM2 is a substrate for MMP9.
- CMl and/or CM2 is a substrate for an
- MMP and includes the sequence ISSGLLSS (SEQ ID NO: 14); QNQALRMA (SEQ ID NO: 15); AQNLLGMV (SEQ ID NO: 16); STFPFGMF (SEQ ID NO: 17); PVGYTSSL (SEQ ID NO: 18); DWLYWPGI (SEQ ID NO: 19); MIAPVAYR (SEQ ID NO: 20);
- RPSPMWAY SEQ ID NO: 21
- WATPRPMR SEQ ID NO: 22
- FRLLDWQW SEQ ID NO: 23
- LKAAPRWA SEQ ID NO: 24
- GPSHLVLT SEQ ID NO: 25
- LPGGLSPW SEQ ID NO: 26
- MGLFSEAG SEQ ID NO: 27
- SPLPLRVP SEQ ID NO: 28
- RMHLRSLG (SEQ ID NO: 29); LAAPLGLL (SEQ ID NO: 30); AVGLLAPP (SEQ ID NO: 31); LLAPSHRA (SEQ ID NO: 32), PAGLWLDP (SEQ ID NO: 33); and/or ISSGLSS (SEQ ID NO: 159).
- the first cleaving agent and the second cleaving agent are the same protease, and the first CM and the second CM are different substrates for the enzyme. In some embodiments, the first cleaving agent and the second cleaving agent are different proteases. In some embodiments, the first cleaving agent and the second cleaving agent are co-localized in the target tissue. In some embodiments, the first CM and the second CM are cleaved by at least one cleaving agent in the target tissue.
- the agent conjugated to the AB is a therapeutic agent.
- the agent is an antineoplastic agent. In some embodiments, the agent is a toxin or fragment thereof. As used herein, a fragment of a toxin is a fragment that retains toxic activity. In some embodiments, the agent is conjugated to the AB via a cleavable linker. In some embodiments, the agent is conjugated to the AB via a linker that includes at least one MMP-cleavable substrate sequence. In some embodiments, the agent is conjugated to the AB via a noncleavable linker. In some embodiments, the agent is a microtubule inhibitor.
- the agent is a nucleic acid damaging agent, such as a DNA alkylator or DNA intercalator, or other DNA damaging agent.
- the agent is an agent selected from the group listed in Table 3.
- the agent is a dolastatin.
- the agent is an auristatin or derivative thereof.
- the agent is auristatin E or a derivative thereof.
- the agent is monomethyl auristatin E (MMAE).
- the agent is monomethyl auristatin D (MMAD).
- the agent is a maytansinoid or maytansinoid derivative.
- the agent is DM1 or DM4.
- the agent is a duocarmycin or derivative thereof.
- the agent is a calicheamicin or derivative thereof.
- the agent is a pyrrolobenzodiazepine.
- the agent is an anti-inflammatory agent.
- the antibody also includes a detectable moiety.
- the detectable moiety is a diagnostic agent.
- the conjugated antibody and/or conjugated activatable antibody includes a detectable label.
- the detectable label includes an imaging agent, a contrasting agent, an enzyme, a fluorescent label, a chromophore, a dye, one or more metal ions, or a ligand-based label.
- the imaging agent comprises a radioisotope.
- the radioisotope is indium or technetium.
- the contrasting agent comprises iodine, gadolinium or iron oxide.
- the enzyme comprises horseradish peroxidase, alkaline phosphatase, or ⁇ -galactosidase.
- the fluorescent label comprises yellow fluorescent protein (YFP), cyan fluorescent protein (CFP), green fluorescent protein (GFP), modified red fluorescent protein (mRFP), red fluorescent protein tdimer2 (RFP tdimer2), HCRED, or a europium derivative.
- the luminescent label comprises an N- methylacrydium derivative.
- the label comprises an Alexa Fluor ® label, such as Alex Fluor ® 680 or Alexa Fluor ® 750.
- the ligand- based label comprises biotin, avidin, streptavidin or one or more haptens.
- the AB of the antibody naturally contains one or more disulfide bonds.
- the AB can be engineered to include one or more disulfide bonds.
- the antibody and/or conjugated antibody is monospecific. In some embodiments, the antibody and/or conjugated antibody is multispecific, referred to herein as multispecific antibodies and/or conjugated multispecific antibodies. In some embodiments, the multispecific antibody and/or conjugated
- multispecific antibody is bispecific or trifunctional.
- the antibody and/or conjugated antibody is formulated as part of a pro-Bispecific T Cell Engager (pro- BYTE) molecule.
- the antibody and/or conjugated antibody is formulated as part of a pro-Chimeric Antigen Receptor (pro-CAR) modified T cell or other engineered receptor.
- pro-BYTE pro-Bispecific T Cell Engager
- pro-CAR pro-Chimeric Antigen Receptor
- the activatable antibody and/or conjugated activatable antibody is monospecific. In some embodiments, the activatable antibody and/or conjugated activatable antibody is multispecific, referred to herein as multispecific activatable antibodies and/or conjugated multispecific activatable antibodies. As used herein, terms such as "activatable antibody” and all grammatical variations thereof, unless otherwise noted, are intended to encompass, but are not limited to embodiments where the activatable antibody is a multispecific activatable antibody of the disclosure.
- conjugated activatable antibody and all grammatical variations thereof, unless otherwise noted, are intended to encompass, but are not limited to embodiments where the conjugated activatable antibody is a conjugated multispecific activatable antibody of the disclosure.
- the multispecific activatable antibody and/or conjugated multispecific activatable antibody is bispecific or trifunctional.
- the activatable antibody and/or conjugated activatable antibody is formulated as part of a pro- Bispecific T Cell Engager (pro-BITE) molecule.
- pro-BITE pro- Bispecific T Cell Engager
- the activatable antibody and/or conjugated activatable antibody is formulated as part of a pro-Chimeric Antigen Receptor (pro-CAR) modified T cell or other engineered receptor.
- pro-CAR pro-Chimeric Antigen Receptor
- the activatable antibodies, conjugated activatable antibodies, multispecific activatable antibodies, and/or conjugated multispecific activatable antibodies described herein are used in conjunction with one or more additional agents or a combination of additional agents. Suitable additional agents include current pharmaceutical and/or surgical therapies for an intended application, such as, for example, cancer.
- the activatable antibodies, conjugated activatable antibodies, multispecific activatable antibodies, and/or conjugated multispecific activatable antibodies can be used in conjunction with an additional chemotherapeutic or anti-neoplastic agent.
- the activatable antibodies described herein in an activated state bind a given target and include (i) an antibody or an antigen binding fragment thereof (AB) that specifically binds to the target; (ii) a masking moiety (MM) that inhibits the binding of the AB to the target in an uncleaved state; and (c) a cleavable moiety (CM) coupled to the AB, wherein the CM is a polypeptide that functions as a substrate for a matrix metalloprotease.
- AB antibody or an antigen binding fragment thereof
- MM masking moiety
- CM cleavable moiety
- the activatable antibody in the uncleaved state has the structural arrangement from N-terminus to C-terminus as follows: MM-CM-AB or AB-CM- MM.
- the activatable antibody comprises a linking peptide between the MM and the CM.
- the activatable antibody comprises a linking peptide between the CM and the AB.
- the activatable antibody comprises a first linking peptide (LP1) and a second linking peptide (LP2), and the activatable antibody in the uncleaved state has the structural arrangement from N-terminus to C-terminus as follows: MM-LP 1 -CM-LP2-AB or AB-LP2-CM-LP 1 -MM.
- each of LP1 and LP2 is a peptide of about 1 to 20 amino acids in length.
- the two linking peptides need not be identical to each other.
- At least one of LP1 or LP2 comprises an amino acid sequence selected from the group consisting of (GS) n , (GGS) n , (GSGGS) n (SEQ ID NO: 1) and (GGGS) n (SEQ ID NO: 2), where n is an integer of at least one.
- At least one of LP1 or LP2 comprises an amino acid sequence selected from the group consisting of GGSG (SEQ ID NO: 3), GGSGG (SEQ ID NO: 4), GSGSG (SEQ ID NO: 5), GSGGG (SEQ ID NO: 6), GGGSG (SEQ ID NO: 7), and GSSSG (SEQ ID NO: 8).
- LP 1 comprises the amino acid sequence
- GSSGGSGGSGGSG SEQ ID NO: 9
- GSSGGSGGSGG SEQ ID NO: 10
- GSSGGSGGSGGS SEQ ID NO: 11
- GSSGGSGGSGGSGGGS SEQ ID NO: 155
- GSSGGSGGSG SEQ ID NO: 156
- GSSGGSGGSGS SEQ ID NO: 157
- LP2 comprises the amino acid sequence GSS, GGS,
- GGGS SEQ ID NO: 158
- GSSGT SEQ ID NO: 12
- GSSG SEQ ID NO: 13
- the AB has an equilibrium dissociation constant of about 100 nM or less for binding to the target.
- the activatable antibody includes an antibody or antigen-binding fragment thereof that specifically binds a target.
- the antibody or immunologically active fragment thereof that binds the target is a monoclonal antibody, domain antibody, single chain, Fab fragment, a F(ab')2 fragment, a scFv, a scab, a dAb, a single domain heavy chain antibody, or a single domain light chain antibody.
- such an antibody or immunologically active fragment thereof that binds the target is a mouse, other rodent, chimeric, humanized or fully human monoclonal antibody.
- the activatable antibody is a multispecific activatable antibody.
- the multispecific activatable antibodies provided herein are multispecific antibodies that recognize two or more different antigens or epitopes and that include at least one masking moiety (MM) linked to at least one antigen- or epitope-binding domain of the multispecific antibody such that coupling of the MM reduces the ability of the antigen- or epitope-binding domain to bind its target.
- the MM is coupled to the antigen- or epitope-binding domain of the multispecific antibody via a cleavable moiety (CM) that functions as a substrate for at least one MMP protease.
- CM cleavable moiety
- the activatable multispecific antibodies provided herein are stable in circulation, activated at intended sites of therapy and/or diagnosis but not in normal, i.e., healthy tissue, and, when activated, exhibit binding to a target that is at least comparable to the corresponding, unmodified multispecific antibody.
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a first antibody or antigen binding fragment thereof (AB 1) that specifically binds a Jagged target, e.g., Jagged 1 and/or Jagged 2, and that contains a combination of a VH CDR1 sequence, a VH CDR2 sequence, and a VH CDR3 sequence, wherein at least one of the VH CDR1 sequence, the VH CDR2 sequence, and the VH CDR3 sequence is selected from a VH CDR1 that sequence includes at least the amino acid sequence SYAMS (SEQ ID NO: 498); a VH CD2 sequence that includes at least the amino acid sequence
- SIDPEGRQT YYAD S VKG (SEQ ID NO: 499); a VH CDR3 sequence that includes at least the amino acid sequence DIGGRSAFDY (SEQ ID NO: 500), and combinations thereof.
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a first antibody or antigen binding fragment thereof (AB1) that specifically binds a Jagged target, e.g., Jagged 1 and/or Jagged 2, and that contains a combination of a VL CDR1 sequence, a VL CDR2 sequence, and a VL CDR3 sequence, wherein at least one of the VL CDR1 sequence, the VL CDR2 sequence, and the VL CDR3 sequence is selected from a VL CDR1 sequence that includes at least the amino acid sequence RASQSISSY (SEQ ID NO: 501); a VL CDR2 sequence that includes at least the amino acid sequence AASSLQS (SEQ ID NO: 502); a VL CDR3 sequence that includes at least the amino acid sequence QQTVVAPPL (SEQ ID NO: 50)
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a first antibody or antigen binding fragment thereof (AB1) that specifically binds a Jagged target, e.g., Jagged 1 and/or Jagged 2, and that contains a combination of a VH CDR1 sequence, a VH CDR2 sequence, and a VH CDR3 sequence, wherein at least one of the VH CDR1 sequence, the VH CDR2 sequence, and the VH CDR3 sequence is selected from a VH CDR1 sequence that includes a sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to the amino acid sequence SYAMS (SEQ ID NO: 498); a VH CD2 sequence that includes a sequence that is at least 90%, 91%, 92%, 9
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a first antibody or antigen binding fragment thereof (AB1) that specifically binds a Jagged target, e.g., Jagged 1 and/or Jagged 2, and that contains a combination of a VL CDRl sequence, a VL CDR2 sequence, and a VL CDR3 sequence, wherein at least one of the VL CDRl sequence, the VL CDR2 sequence, and the VL CDR3 sequence is selected from a VL CDRl sequence that includes a sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to the amino acid sequence RASQSISSY (SEQ ID NO: 501); a VL CDR2 sequence that includes a sequence that is at least 90%, 91%,
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a first antibody or antigen binding fragment thereof (AB1) that specifically binds a Jagged target, e.g., Jagged 1 and/or Jagged 2, and that contains a combination of a VH CDRl sequence, a VH CDR2 sequence, a VH CDR3 sequence, a VL CDRl sequence, a VL CDR2 sequence, and a VL CDR3 sequence, wherein the VH CDRl sequence includes at least the amino acid sequence SYAMS (SEQ ID NO: 498); the VH CD2 sequence includes at least the amino acid sequence SIDPEGRQTYYADSVKG (SEQ ID NO: 499); the VH CDR3 sequence includes at least the amino acid sequence DIGGRSAFDY (SEQ ID NO: 500); the VL CDRl sequence includes at least a first antibody or antigen binding fragment thereof (AB1) that specifically binds a Jagged target, e.g., Jagged 1 and/or
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a first antibody or antigen binding fragment thereof (AB1) that specifically binds a Jagged target, e.g., Jagged 1 and/or Jagged 2, and that contains a combination of a VH CDRl sequence, a VH CDR2 sequence, a VH CDR3 sequence, a VL CDRl sequence, a VL CDR2 sequence, and a VL CDR3 sequence, wherein the VH CDRl sequence includes a sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to the amino acid sequence SYAMS (SEQ ID NO: 498); the VH CD2 sequence includes a sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%,
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a first antibody or antigen binding fragment thereof (AB1) that specifically binds Epidermal Growth Factor Receptor (EGFR) and that contains a combination of a VH CDRl sequence, a VH CDR2 sequence, and a VH CDR3 sequence, wherein at least one of the VH CDRl sequence, the VH CDR2 sequence, and the VH CDR3 sequence is selected from a VH CDRl sequence that includes at least the amino acid sequence NYGVH (SEQ ID NO: 504); a VH CD2 sequence that includes at least the amino acid sequence
- VIWSGGNTDYNTPFTS SEQ ID NO: 505
- VH CDR3 sequence that includes at least the amino acid sequence ALTYYDYEFAY (SEQ ID NO: 506); and combinations thereof.
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a first antibody or antigen binding fragment thereof (AB1) that specifically binds EGFR and that contains a combination of a VL CDRl sequence, a VL CDR2 sequence, and a VL CDR3 sequence, wherein at least one of the VL CDRl sequence, the VL CDR2 sequence, and the VL CDR3 sequence is selected from a VL CDRl sequence that includes at least the amino acid sequence RASQSIGTNIH (SEQ ID NO: 507); a VL CDR2 sequence that includes at least the amino acid sequence KYASESIS (SEQ ID NO: 508); and a VL CDR3 sequence that includes at least the amino acid sequence QQNNNWPTT (SEQ ID NO: 509), and combinations thereof.
- AB1 antibody or antigen binding fragment thereof
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a first antibody or antigen binding fragment thereof (AB1) that specifically binds EGFR and that contains a combination of a VH CDRl sequence, a VH CDR2 sequence, and a VH CDR3 sequence, wherein at least one of the VH CDRl sequence, the VH CDR2 sequence, and the VH CDR3 sequence is selected from a VH CDRl sequence that includes a sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to the amino acid sequence NYGVH (SEQ ID NO: 504); a VH CD2 sequence that includes a sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to the amino acid sequence NYGVH (SEQ ID NO: 504); a VH CD2 sequence that includes a sequence that is at least
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a first antibody or antigen binding fragment thereof (AB1) that specifically binds EGFR and that contains a combination of a VL CDRl sequence, a VL CDR2 sequence, and a VL CDR3 sequence, wherein at least one of the VL CDRl sequence, the VL CDR2 sequence, and the VL CDR3 sequence is selected from a VL CDRl sequence that includes a sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to the amino acid sequence RASQSIGTNIH (SEQ ID NO: 507); a VL CDR2 sequence that includes a sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 9
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a first antibody or antigen binding fragment thereof (AB1) that specifically binds EGFR and that contains a combination of a VH CDRl sequence, a VH CDR2 sequence, a VH CDR3 sequence, a VL CDRl sequence, a VL CDR2 sequence, and a VL CDR3 sequence, wherein the VH CDRl sequence includes at least the amino acid sequence NYGVH (SEQ ID NO: 504); the VH CD2 sequence includes at least the amino acid sequence
- VIWSGGNTDYNTPFTS SEQ ID NO: 505; the VH CDR3 sequence includes at least the amino acid sequence ALTYYDYEFAY (SEQ ID NO: 506); the VL CDRl sequence includes at least the amino acid sequence RASQSIGTNIH (SEQ ID NO: 507); the VL CDR2 sequence includes at least the amino acid sequence KYASESIS (SEQ ID NO: 508); and the VL CDR3 sequence includes at least the amino acid sequence QQNNNWPTT (SEQ ID NO: 509).
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a first antibody or antigen binding fragment thereof (AB1) that specifically binds EGFR and that contains a combination of a VH CDRl sequence, a VH CDR2 sequence, a VH CDR3 sequence, a VL CDRl sequence, a VL CDR2 sequence, and a VL CDR3 sequence, wherein the VH CDRl sequence includes a sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to the amino acid sequence NYGVH (SEQ ID NO: 504); the VH CD2 sequence includes a sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to the amino acid sequence NYGVH (SEQ ID NO: 504); the VH CD2 sequence includes a sequence that is at least 90%, 91%, 92%, 93%
- VIWSGGNTDYNTPFTS (SEQ ID NO: 505); the VH CDR3 sequence includes a sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to the amino acid sequence ALTYYDYEFAY (SEQ ID NO: 506); the VL CDRl sequence includes a sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to the amino acid sequence RASQSIGTNIH (SEQ ID NO: 507); the VL CDR2 sequence includes a sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to the amino acid sequence KYASESIS (SEQ ID NO: 508); and the VL CDR3 sequence includes a sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 9
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a heavy chain amino acid sequence selected from the group consisting of SEQ ID NOs: 54, 56, 57, 58, 61, 63, 65, 68, 70, 72, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 1 10, 1 12, and 1 14.
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a light chain amino acid sequence selected from the group consisting of SEQ ID NOs: 55, 59, 60, 62, 64, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 105, 107, 109, 11 1, and 113.
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a heavy chain amino acid sequence selected from the group consisting of SEQ ID NOs: 54, 56, 57, 58, 61, 63, 65, 68, 70, 72, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, and 114 and a light chain amino acid sequence selected from the group consisting of SEQ ID NOs: 55, 59, 60, 62, 64, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 105, 107, 109, 1 11, and 113.
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a heavy chain amino acid sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to an amino acid sequence selected from the group consisting of SEQ ID NOs: 54, 56, 57, 58, 61, 63, 65, 68, 70, 72, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, and 1 14.
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a light chain amino acid sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to an amino acid sequence selected from the group consisting of SEQ ID NOs: 55, 59, 60, 62, 64, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 105, 107, 109, 1 11, and 113.
- the activatable antibody and/or conjugated activatable antibody provided herein includes at least a heavy chain amino acid sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to an amino acid sequence selected from the group consisting of SEQ ID NOs: 54, 56, 57, 58, 61, 63, 65, 68, 70, 72, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, and 1 14 and a light chain amino acid sequence that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more identical to an amino acid sequence selected from the group consisting of SEQ ID NOs:
- the MM has an equilibrium dissociation constant for binding to the AB that is greater than the equilibrium dissociation constant of the AB to the target.
- the MM has an equilibrium dissociation constant for binding to the AB that is no more than the equilibrium dissociation constant of the AB to the target.
- the MM does not interfere or compete with the AB for binding to the target in a cleaved state.
- the MM is a polypeptide of about 2 to 40 amino acids in length.
- the MM is a polypeptide of up to about 40 amino acids in length.
- the MM polypeptide sequence is different from that of any natural binding partner of the AB. In some embodiments, the MM polypeptide sequence is no more than 50% identical to any natural binding partner of the AB. In some embodiments, the MM polypeptide sequence is no more than 40%, 30%, 25%, 20%, 15%, or 10% identical to any natural binding partner of the AB.
- the coupling of the MM to the AB reduces the ability of the AB to bind its target such that the dissociation constant (3 ⁇ 4) of the AB when coupled to the MM towards the target is at least two times greater than the 3 ⁇ 4 of the AB when not coupled to the MM towards the target.
- the coupling of the MM to the AB reduces the ability of the AB to bind its target such that the dissociation constant (K J ) of the AB when coupled to the MM towards the target is at least three times greater than the K J of the AB when not coupled to the MM towards the target.
- the coupling of the MM to the AB reduces the ability of the AB to bind its target such that the dissociation constant (K d ) of the AB when coupled to the MM towards the target is at least five times greater than the K d of the AB when not coupled to the MM towards the target.
- the coupling of the MM to the AB reduces the ability of the AB to bind its target such that the dissociation constant (K d ) of the AB when coupled to the MM towards the target is at least 10 times greater than the K d of the AB when not coupled to the MM towards the target.
- the coupling of the MM to the AB reduces the ability of the AB to bind its target such that the dissociation constant (K d ) of the AB when coupled to the MM towards the target is at least 20 times greater than the K d of the AB when not coupled to the MM towards the target.
- the coupling of the MM to the AB reduces the ability of the AB to bind the target such that the dissociation constant (K d ) of the AB when coupled to the MM towards the target is at least 40 times greater than the K d of the AB when not coupled to the MM towards the target.
- the coupling of the MM to the AB reduces the ability of the AB to bind the target such that the dissociation constant (K d ) of the AB when coupled to the MM towards the target is at least 100 times greater than the K d of the AB when not coupled to the MM towards the target.
- the coupling of the MM to the AB reduces the ability of the AB to bind the target such that the dissociation constant (K d ) of the AB when coupled to the MM towards the target is at least 1000 times greater than the K d of the AB when not coupled to the MM towards the target.
- the coupling of the MM to the AB reduces the ability of the AB to bind the target such that the dissociation constant (K d ) of the AB when coupled to the MM towards the target is at least 10,000 times greater than the K d of the AB when not coupled to the MM towards the target.
- the MMP protease is co-localized with the target in a tissue, and the MMP cleaves the CM in the activatable antibody when the activatable antibody is exposed to the MMP.
- the MM in the presence of the target, reduces the ability of the AB to bind the target by at least 90% when the CM is uncleaved, as compared to when the CM is cleaved when assayed in vitro using a target displacement assay such as, for example, the assay described in PCT Publication Nos. WO 2009/025846 and WO 2010/081 173.
- a target displacement assay such as, for example, the assay described in PCT Publication Nos. WO 2009/025846 and WO 2010/081 173.
- the CM is positioned in the activatable antibody such that in the uncleaved state, binding of the activatable antibody to the target is reduced to occur with an equilibrium dissociation constant that is at least twofold greater than the equilibrium dissociation constant of an unmodified AB binding to the target, whereas in the cleaved state (i.e., when the activatable antibody is in the cleaved state), the AB binds the target.
- the CM is positioned in the activatable antibody such that in the uncleaved state, binding of the activatable antibody to the target is reduced to occur with an equilibrium dissociation constant that is at least five- fold greater than the equilibrium dissociation constant of an unmodified AB binding to the target, whereas in the cleaved state (i.e., when the activatable antibody is in the cleaved state), the AB binds the target.
- the CM is positioned in the activatable antibody such that in the uncleaved state, binding of the activatable antibody to the target is reduced to occur with an equilibrium dissociation constant that is at least ten-fold greater than the equilibrium dissociation constant of an unmodified AB binding to the target, whereas in the cleaved state (i.e., when the activatable antibody is in the cleaved state), the AB binds the target.
- the CM is positioned in the activatable antibody such that in the uncleaved state, binding of the activatable antibody to the target is reduced to occur with an equilibrium dissociation constant that is at least 20-fold greater than the equilibrium dissociation constant of an unmodified AB binding to the target, whereas in the cleaved state (i.e., when the activatable antibody is in the cleaved state), the AB binds the target.
- the CM is positioned in the activatable antibody such that in the uncleaved state, binding of the activatable antibody to the target is reduced to occur with an equilibrium dissociation constant that is at least 40-fold greater than the equilibrium dissociation constant of an unmodified AB binding to the target, whereas in the cleaved state, the AB binds the target.
- the CM is positioned in the activatable antibody such that in the uncleaved state, binding of the activatable antibody to the target is reduced to occur with an equilibrium dissociation constant that is at least 50-fold greater than the equilibrium dissociation constant of an unmodified AB binding to the target, whereas in the cleaved state, the AB binds the target.
- the CM is positioned in the activatable antibody such that in the uncleaved state, binding of the activatable antibody to the target is reduced to occur with an equilibrium dissociation constant that is at least 100-fold greater than the equilibrium dissociation constant of an unmodified AB binding to the target, whereas in the cleaved state, the AB binds the target.
- the CM is positioned in the activatable antibody such that in the uncleaved state, binding of the activatable antibody to the target is reduced to occur with an equilibrium dissociation constant that is at least 200-fold greater than the equilibrium dissociation constant of an unmodified AB binding to the target, whereas in the cleaved state, the AB binds the target.
- the CM is a polypeptide of up to 15 amino acids in length.
- the CM is a substrate for at least one matrix metalloprotease (MMP).
- MMPs include MMP l; MMP2; MMP3; MMP7; MMP8; MMP9; MMP10; MMP 11; MMP 12; MMP 13; MMP 14; MMP 15; MMP 16;
- the CM is a substrate for MMP9, MMP 14, MMPl, MMP 3, MMP 13, MMP 17, MMP l 1, and MMP 19. In some embodiments, the CM is a substrate for MMP9. In some embodiments, the CM is a substrate for MMP 14. In some embodiments, the CM is a substrate for two or more MMPs. In some embodiments, the CM is a substrate for at least MMP9 and MMP 14. In some embodiments, the CM comprises two or more substrates for the same MMP. In some embodiments, the CM comprises at least two or more MMP9 substrates. In some embodiments, the CM comprises at least two or more MMP14 substrates.
- the CM is a substrate for an MMP and includes the sequence ISSGLLSS (SEQ ID NO: 14); QNQALRMA (SEQ ID NO: 15); AQNLLGMV (SEQ ID NO: 16); STFPFGMF (SEQ ID NO: 17); PVGYTSSL (SEQ ID NO: 18);
- DWLYWPGI (SEQ ID NO: 19); MIAPVAYR (SEQ ID NO: 20); RPSPMWAY (SEQ ID NO: 21); WATPRPMR (SEQ ID NO: 22); FRLLDWQW (SEQ ID NO: 23); LKAAPRWA (SEQ ID NO: 24); GPSHLVLT (SEQ ID NO: 25); LPGGLSPW (SEQ ID NO: 26);
- MGLFSEAG SEQ ID NO: 27
- SPLPLRVP SEQ ID NO: 28
- RMHLRSLG SEQ ID NO: 29
- LAAPLGLL SEQ ID NO: 30
- AVGLLAPP SEQ ID NO: 31
- LLAPSHRA SEQ ID NO: 32
- PAGLWLDP SEQ ID NO: 33
- ISSGLSS SEQ ID NO: 159
- the CM comprises the amino acid sequence
- the CM comprises the amino acid sequence QNQALRMA (SEQ ID NO: 15). In some embodiments, the CM comprises the amino acid sequence AQNLLGMV (SEQ ID NO: 16). In some embodiments, the CM comprises the amino acid sequence STFPFGMF (SEQ ID NO: 17). In some embodiments, the CM comprises the amino acid sequence PVGYTSSL (SEQ ID NO: 18). In some embodiments, the CM comprises the amino acid sequence DWLYWPGI (SEQ ID NO: 19). In some embodiments, the CM comprises the amino acid sequence MIAPVAYR (SEQ ID NO: 20).
- the CM comprises the amino acid sequence RPSPMWAY (SEQ ID NO: 21). In some embodiments, the CM comprises the amino acid sequence WATPRPMR (SEQ ID NO: 22). In some embodiments, the CM comprises the amino acid sequence FRLLDWQW (SEQ ID NO: 23). In some embodiments, the CM comprises the amino acid sequence LKAAPRWA (SEQ ID NO: 24). In some embodiments, the CM comprises the amino acid sequence GPSHLVLT (SEQ ID NO: 25). In some embodiments, the CM comprises the amino acid sequence LPGGLSPW (SEQ ID NO: 26). In some embodiments, the CM comprises the amino acid sequence MGLFSEAG (SEQ ID NO: 27).
- the CM comprises the amino acid sequence SPLPLRVP (SEQ ID NO: 28). In some embodiments, the CM comprises the amino acid sequence RMHLRSLG (SEQ ID NO: 29). In some embodiments, the CM comprises the amino acid sequence LAAPLGLL (SEQ ID NO: 30). In some embodiments, the CM comprises the amino acid sequence AVGLLAPP (SEQ ID NO: 31). In some embodiments, the CM comprises the amino acid sequence LLAPSHRA (SEQ ID NO: 32). In some embodiments, the CM comprises the amino acid sequence PAGLWLDP (SEQ ID NO: 33). In some embodiments, the CM comprises the amino acid sequence ISSGLSS (SEQ ID NO: 159).
- the CM is a substrate for at least two proteases.
- at least one protease is an MMP and at least one protease is selected from the group consisting of those shown in Table 7.
- the activatable antibody includes at least a first CM and a second CM.
- the first CM and the second CM are each polypeptides of no more than 15 amino acids long.
- the first CM and the second CM in the activatable antibody have the structural arrangement from N-terminus to C-terminus as follows in the uncleaved state: MM-CM 1 -CM2-AB, AB-CM2-CM 1 -MM, MM-CM2-CM1-AB, or AB-CM 1 -CM2-MM.
- the activatable antibody includes a linking peptide between MM and CM1.
- the activatable antibody includes a linking peptide between CM1 and CM2. In some embodiments, the activatable antibody includes a linking peptide between CM2 and AB. In some embodiments, the activatable antibody includes a linking peptide between MM and CM1 and a linking peptide between CM2 and AB. In some embodiments, the activatable antibody includes a linking peptide between MM and CM1 and a linking peptide between CM1 and CM2. In some embodiments, the activatable antibody includes a linking peptide between CM1 and CM2 and a linking peptide between CM2 and AB. In some embodiments,
- the activatable antibody includes a linking peptide between MM and CM1, a linking peptide between CM1 and CM2, and a linking peptide between CM2 and AB.
- the activatable antibody includes at least a first CM that includes a substrate for at least one matrix metalloprotease (MMP) and a second CM that includes a substrate sequence.
- CM2 matrix metalloprotease
- Exemplary substrates for the second CM (CM2) include but are not limited to substrates cleavable by one or more of the following enzymes or proteases listed in Table 7.
- the CM2 is selected for use with a specific protease.
- the CM2 is a substrate for at least one protease selected from the group consisting of a matrix metalloprotease (MMP), a neutrophil elastase, u-type plasminogen activator (uPA, also referred to as urokinase), legumain, matriptase (MT-SP l), thrombin, a cysteine protease such as a cathepsin, ADAM 17, BMP-1, HtrAl, and a TMPRSS such as TMPRSS3 or TMPRSS4.
- MMP matrix metalloprotease
- uPA u-type plasminogen activator
- MT-SP l matriptase
- thrombin a cysteine protease
- TMPRSS such as TMPRSS3 or TMPRSS4.
- the CM2 is a substrate for a neutrophil elastase. In some embodiments, the CM2 is a substrate for uPA. In some embodiments, the CM2 is a substrate for legumain. In some embodiments, the CM2 is a substrate for matriptase. In some embodiments, the CM2 is a substrate for thrombin. In some embodiments, the CM2 is a substrate for a cysteine protease. In some embodiments, the CM2 is a substrate for a cathepsin. In some embodiments, the CM2 is a substrate for ADAM17. In some
- the CM2 is a substrate for BMP-1. In some embodiments, the CM2 is a substrate for HtrAl. In some embodiments, the CM2 is a substrate for a TMPRSS. In some embodiments, the CM2 is a substrate for TMPRSS3. In some embodiments, the CM2 is a substrate for TMPRSS4.
- CM2 are cleaved by at least one protease and include the sequence TGRGPSWV (SEQ ID NO: 34); SARGPSRW (SEQ ID NO: 35);
- TARGPSFK (SEQ ID NO: 36); LSGRSDNH (SEQ ID NO: 37); GGWHTGRN (SEQ ID NO: 38); HTGRSGAL (SEQ ID NO: 39); PLTGRSGG (SEQ ID NO: 40); AARGPAIH (SEQ ID NO: 41); RGPAFNPM (SEQ ID NO: 42); SSRGPAYL (SEQ ID NO: 43);
- RGPATPIM SEQ ID NO: 44
- RGPA SEQ ID NO: 45
- GGQPSGMWGW SEQ ID NO: 46
- FPRPLGITGL SEQ ID NO: 47
- VHMPLGFLGP SEQ ID NO: 48
- SPLTGRSG SEQ ID NO: 49
- SAGFSLPA SEQ ID NO: 126
- LAPLGLQRR SEQ ID NO: 50
- SGGPLGVR SEQ ID NO: 51
- PLGL SEQ ID NO: 52
- GPRSFGL SEQ ID NO: 315
- GPRSFG SEQ ID NO: 316
- the CM2 comprises the amino acid sequence
- the CM2 comprises the amino acid sequence SARGPSRW (SEQ ID NO: 35). In some embodiments, the CM2 comprises the amino acid sequence TARGPSFK (SEQ ID NO: 36). In some embodiments, the CM2 comprises the amino acid sequence LSGRSDNH (SEQ ID NO: 37). In some embodiments, the CM2 comprises the amino acid sequence GGWHTGRN (SEQ ID NO: 38). In some embodiments, the CM2 comprises the amino acid sequence HTGRSGAL (SEQ ID NO: 39). In some embodiments, the CM2 comprises the amino acid sequence PLTGRSGG (SEQ ID NO: 40).
- the CM2 comprises the amino acid sequence AARGPAIH (SEQ ID NO: 41). In some embodiments, the CM2 comprises the amino acid sequence RGPAFNPM (SEQ ID NO: 42). In some embodiments, the CM2 comprises the amino acid sequence SSRGPAYL (SEQ ID NO: 43). In some embodiments, the CM2 comprises the amino acid sequence RGPATPIM (SEQ ID NO: 44). In some embodiments, the CM2 comprises the amino acid sequence RGPA (SEQ ID NO: 45). In some embodiments, the CM2 comprises the amino acid sequence GGQPSGMWGW (SEQ ID NO: 46). In some embodiments, the CM2 comprises the amino acid sequence FPRPLGITGL (SEQ ID NO: 47). In some embodiments, the CM2 comprises the amino acid sequence
- the CM2 comprises the amino acid sequence SPLTGRSG (SEQ ID NO: 49). In some embodiments, the CM2 comprises the amino acid sequence LAPLGLQRR (SEQ ID NO: 50). In some embodiments, the CM2 comprises the amino acid sequence SGGPLGVR (SEQ ID NO: 51). In some embodiments, the CM2 comprises the amino acid sequence PLGL (SEQ ID NO: 52). In some embodiments,
- the CM2 comprises the amino acid sequence GPRSFGL (SEQ ID NO: 315). In some embodiments, the CM2 comprises the amino acid sequence GPRSFG (SEQ ID NO: 316)
- the CM2 is a substrate for at least one MMP. In some embodiments, the CM2 is a substrate for at least one MMP listed in the Table 7. In some embodiments, the CM2 is a substrate for MMP9. In some embodiments, the CM2 is a substrate for MMP 14. In some embodiments, CMl is substrate for a first MMP, and CM2 is a substrate for a second MMP, where the first MMP and the second MMP are different MMPs. In some embodiments, CMl is a first substrate sequence for a MMP, and CM2 is a second substrate for the same MMP, where the CMl and CM2 have different substrate sequences.
- the CM2 is a substrate for two or more MMPs. In some embodiments, the CM2 is a substrate for at least MMP9 or MMP 14. In some embodiments, the CM2 is a substrate for two or more MMPs. In some embodiments, the CM2 is a substrate for at least MMP9 and MMP 14. In some embodiments, CMl and CM2 are both substrates for MMP9. In some embodiments, CMl and CM2 are both substrates for MMP 14. In some embodiments, CMl is a substrate for MMP9 and CM2 is a substrate for MMP 14. In some embodiments, CMl is a substrate for MMP 14 and CM2 is a substrate for MMP9.
- CMl and/or CM2 is a substrate for an MMP and includes the sequence ISSGLLSS (SEQ ID NO: 14); QNQALRMA (SEQ ID NO: 15); AQNLLGMV (SEQ ID NO: 16); STFPFGMF (SEQ ID NO: 17); PVGYTSSL (SEQ ID NO: 18); DWLYWPGI (SEQ ID NO: 19); MIAPVAYR (SEQ ID NO: 20);
- RPSPMWAY SEQ ID NO: 21
- WATPRPMR SEQ ID NO: 22
- FRLLDWQW SEQ ID NO: 23
- LKAAPRWA SEQ ID NO: 24
- GPSHLVLT SEQ ID NO: 25
- LPGGLSPW SEQ ID NO: 26
- MGLFSEAG SEQ ID NO: 27
- SPLPLRVP SEQ ID NO: 28
- RMHLRSLG (SEQ ID NO: 29); LAAPLGLL (SEQ ID NO: 30); AVGLLAPP (SEQ ID NO: 31); LLAPSHRA (SEQ ID NO: 32), PAGLWLDP (SEQ ID NO: 33); and/or ISSGLSS (SEQ ID NO: 159).
- the first cleaving agent and the second cleaving agent are the same matrix metalloprotease, and the first CM and the second CM are different substrates for the enzyme.
- the first cleaving agent and the second cleaving agent are different proteases, where at least one protease is an MMP.
- the first cleaving agent and the second cleaving agent are co-localized in the target tissue.
- the first CM and the second CM are cleaved by at least one cleaving agent in the target tissue.
- the activatable antibody is exposed to and cleaved by a MMP such that, in the activated or cleaved state, the activated antibody includes a light chain amino acid sequence that includes at least a portion of LP2 and/or CM sequence after the MMP has cleaved the CM.
- the CM comprises the non-prime side of the protease cleavage site; that is, the CM comprises at least the PI and P2 amino acids, and in some embodiments, comprises the PI, P2 and P3 amino acids and in some embodiments, comprises the PI, P2, P3, and P4 amino acids.
- the CM comprises the non-prime side and the prime side of the protease cleavage site.
- the CM comprises the non-prime side but lacks at least part of the prime side of the protease cleavage site.
- the CM comprises the non-prime side but lacks the prime side of the protease cleavage site.
- Such a CM can be linked directly or through a linker to an antibody or other molecule as disclosed herein, such as, but not limited to, a detection moiety.
- the activatable antibody is an anti-EGFR activatable antibody that includes at least an AB that is or is derived from cetuximab or panitumumab; a MM comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 160, 167-200, and 497; and a CM comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 14-33, and 159.
- the activatable antibody is an anti-EGFR activatable antibody that includes at least an AB that is or is derived from cetuximab or panitumumab; a MM comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 160, 167-200, and 497; and a CM comprising an amino acid sequence selected from the group consisting of the sequences presented in Tables 8A-8M.
- the anti-EGFR activatable antibody also includes a first linking peptide (LPl) and a second linking peptide (LP2), and the activatable antibody in the uncleaved state has the structural arrangement from N-terminus to C- terminus as follows: MM-LP 1 -CM-LP2-AB or AB-LP2-CM-LP 1 -MM.
- each of LP 1 and LP2 is a peptide of about 1 to 20 amino acids in length.
- the two linking peptides need not be identical to each other.
- At least one of LPl or LP2 comprises an amino acid sequence selected from the group consisting of (GS) protest, (GGS) context, (GSGGS) context (SEQ ID NO: 1) and (GGGS) structuri (SEQ ID NO: 2), where n is an integer of at least one.
- at least one of LPl or LP2 comprises an amino acid sequence selected from the group consisting of GGSG (SEQ ID NO: 3), GGSGG (SEQ ID NO: 4), GSGSG (SEQ ID NO: 5), GSGGG (SEQ ID NO: 6), GGGSG (SEQ ID NO: 7), and GSSSG (SEQ ID NO: 8).
- LP l comprises the amino acid sequence GSSGGSGGSGGSG (SEQ ID NO: 9),
- GSSGGSGGSGG SEQ ID NO: 10
- GSSGGSGGSGGS SEQ ID NO: 11
- LP2 comprises the amino acid sequence GSS, GGS, GGGS (SEQ ID NO: 158), GSSGT (SEQ ID NO: 12) or GSSG (SEQ ID NO: 13).
- the activatable antibody is an anti-EGFR activatable antibody that includes at least an AB comprising a heavy chain amino acid sequence comprising the VH CDR1 sequence of SEQ ID NO: 504, the VH CDR2 sequence of SEQ ID NO: 505, the VH CDR3 sequence of SEQ ID NO: 506, the VL CDR1 sequence of SEQ ID NO: 507, the VL CDR2 sequence of SEQ ID NO: 508, and the VL CDR2 sequence of SEQ ID NO: 509; a MM comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 160, 167-200, and 497; and a CM comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 14-33, and 159.
- the activatable antibody is an anti-EGFR activatable antibody that includes at least an AB comprising a heavy chain amino acid sequence comprising the VH CDR1 sequence of SEQ ID NO: 504, the VH CDR2 sequence of SEQ ID NO: 505, the VH CDR3 sequence of SEQ ID NO: 506, the VL CDR1 sequence of SEQ ID NO: 507, the VL CDR2 sequence of SEQ ID NO: 508, and the VL CDR2 sequence of SEQ ID NO: 509; a MM comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 160, 167-200, and 497; and a CM comprising an amino acid sequence selected from the group consisting of the sequences presented in Tables 8A-8M.
- the anti-EGFR activatable antibody also includes a first linking peptide (LP1) and a second linking peptide (LP2), and the activatable antibody in the uncleaved state has the structural arrangement from N-terminus to C-terminus as follows: MM-LP1-CM-LP2-AB or AB- LP2-CM-LP1-MM.
- each of LP1 and LP2 is a peptide of about 1 to 20 amino acids in length.
- the two linking peptides need not be identical to each other.
- At least one of LP 1 or LP2 comprises an amino acid sequence selected from the group consisting of (GS) n , (GGS) n , (GSGGS) n (SEQ ID NO: 1) and (GGGS) n (SEQ ID NO: 2), where n is an integer of at least one.
- at least one of LP1 or LP2 comprises an amino acid sequence selected from the group consisting of GGSG (SEQ ID NO: 3), GGSGG (SEQ ID NO: 4), GSGSG (SEQ ID NO: 5), GSGGG (SEQ ID NO: 6), GGGSG (SEQ ID NO: 7), and GSSSG (SEQ ID NO: 8).
- LP1 comprises the amino acid sequence
- GSSGGSGGSGGSG SEQ ID NO: 9
- GSSGGSGGSGG SEQ ID NO: 10
- LP2 comprises the amino acid sequence GSS, GGS, GGGS (SEQ ID NO: 158), GSSGT (SEQ ID NO: 12) or GSSG (SEQ ID NO: 13).
- the activatable antibody is an anti-EGFR activatable antibody that includes at least an AB comprising the heavy chain amino acid sequence of SEQ ID NO: 56, 57 or 58 and the light chain amino acid sequence of SEQ ID NO: 59; a MM comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 160, 167-200, and 497; and a CM comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 14-33, and 159.
- the activatable antibody is an anti-EGFR activatable antibody that includes at least an AB comprising the heavy chain amino acid sequence of SEQ ID NO: 56, 57 or 58 and the light chain amino acid sequence of SEQ ID NO: 59; a MM comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 160, 167-200, and 497; and a CM comprising an amino acid sequence selected from the group consisting of the sequences presented in Tables 8A-8M.
- the anti-EGFR activatable antibody also includes a first linking peptide (LP 1) and a second linking peptide (LP2), and the activatable antibody in the uncleaved state has the structural arrangement from N-terminus to C-terminus as follows: MM-LP 1-CM-LP2-AB or AB-LP2-CM-LP 1 -MM.
- each of LP1 and LP2 is a peptide of about 1 to 20 amino acids in length.
- the two linking peptides need not be identical to each other.
- At least one of LP1 or LP2 comprises an amino acid sequence selected from the group consisting of (GS) protest, (GGS) context, (GSGGS) n (SEQ ID NO: 1) and (GGGS)neig (SEQ ID NO: 2), where n is an integer of at least one.
- at least one of LP 1 or LP2 comprises an amino acid sequence selected from the group consisting of GGSG (SEQ ID NO: 3), GGSGG (SEQ ID NO: 4), GSGSG (SEQ ID NO: 5), GSGGG (SEQ ID NO: 6), GGGSG (SEQ ID NO: 7), and GSSSG (SEQ ID NO: 8).
- LP1 comprises the amino acid sequence GSSGGSGGSGGSG (SEQ ID NO: 9), GSSGGSGGSGG (SEQ ID NO: 10), GSSGGSGGSGGS (SEQ ID NO: 11), GSSGGSGGSGGSGGGS (SEQ ID NO: 155), GSSGGSGGSG (SEQ ID NO: 156), or GSSGGSGGSGS (SEQ ID NO: 157).
- LP2 comprises the amino acid sequence GSS, GGS, GGGS (SEQ ID NO: 158), GSSGT (SEQ ID NO: 12) or GSSG (SEQ ID NO: 13).
- the activatable antibody is an anti-EGFR activatable antibody that includes at least an AB comprising the heavy chain amino acid sequence of SEQ ID NO: 56 and the light chain amino acid sequence of SEQ ID NO: 59; a MM comprising the amino acid sequence of SEQ ID NO: 160; and a CM comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 14-33, and 159.
- the activatable antibody is an anti-EGFR activatable antibody that includes at least an AB comprising the heavy chain amino acid sequence of SEQ ID NO: 56 and the light chain amino acid sequence of SEQ ID NO: 59; a MM comprising the amino acid sequence of SEQ ID NO: 160; and a CM comprising an amino acid sequence selected from the group consisting of the sequences presented in Tables 8A-8M.
- the anti-EGFR activatable antibody also includes a first linking peptide (LP1) and a second linking peptide (LP2), and the activatable antibody in the uncleaved state has the structural arrangement from N-terminus to C-terminus as follows: MM-LP 1-CM-LP2-AB or AB- LP2-CM-LP1-MM.
- each of LP1 and LP2 is a peptide of about 1 to 20 amino acids in length.
- the two linking peptides need not be identical to each other.
- At least one of LP 1 or LP2 comprises an amino acid sequence selected from the group consisting of (GS) n , (GGS) n , (GSGGS) n (SEQ ID NO: 1) and (GGGS) n (SEQ ID NO: 2), where n is an integer of at least one.
- at least one of LP1 or LP2 comprises an amino acid sequence selected from the group consisting of GGSG (SEQ ID NO: 3), GGSGG (SEQ ID NO: 4), GSGSG (SEQ ID NO: 5), GSGGG (SEQ ID NO: 6), GGGSG (SEQ ID NO: 7), and GSSSG (SEQ ID NO: 8).
- LPl comprises the amino acid sequence
- GSSGGSGGSGGSG SEQ ID NO: 9
- GSSGGSGGSGG SEQ ID NO: 10
- LP2 comprises the amino acid sequence GSS, GGS, GGGS (SEQ ID NO: 158), GSSGT (SEQ ID NO: 12) or GSSG (SEQ ID NO: 13).
- the activatable antibody is an anti-EGFR activatable antibody that includes at least an AB comprising a heavy chain amino acid sequence comprising the VH CDRl sequence of SEQ ID NO: 504, the VH CDR2 sequence of SEQ ID NO: 505, the VH CDR3 sequence of SEQ ID NO: 506, the VL CDRl sequence of SEQ ID NO: 507, the VL CDR2 sequence of SEQ ID NO: 508, and the VL CDR2 sequence of SEQ ID NO: 509; a MM comprising the amino acid sequence of SEQ ID NO: 160; and a CM comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 14-33, and 159.
- the activatable antibody is an anti-EGFR activatable antibody that includes at least an AB comprising a heavy chain amino acid sequence comprising the VH CDRl sequence of SEQ ID NO: 504, the VH CDR2 sequence of SEQ ID NO: 505, the VH CDR3 sequence of SEQ ID NO: 506, the VL CDRl sequence of SEQ ID NO: 507, the VL CDR2 sequence of SEQ ID NO: 508, and the VL CDR2 sequence of SEQ ID NO: 509; a MM comprising the amino acid sequence of SEQ ID NO: 160; and a CM comprising an amino acid sequence selected from the group consisting of the sequences presented in Tables 8A-8M.
- the anti-EGFR activatable antibody also includes a first linking peptide (LPl) and a second linking peptide (LP2), and the activatable antibody in the uncleaved state has the structural arrangement from N-terminus to C-terminus as follows: MM-LP 1-CM-LP2-AB or AB-LP2-CM-LP 1 - MM.
- each of LP 1 and LP2 is a peptide of about 1 to 20 amino acids in length.
- the two linking peptides need not be identical to each other.
- At least one of LPl or LP2 comprises an amino acid sequence selected from the group consisting of (GS) n , (GGS) n , (GSGGS) n (SEQ ID NO: 1) and (GGGS) n (SEQ ID NO: 2), where n is an integer of at least one.
- at least one of LP 1 or LP2 comprises an amino acid sequence selected from the group consisting of GGSG (SEQ ID NO: 3), GGSGG (SEQ ID NO: 4), GSGSG (SEQ ID NO: 5), GSGGG (SEQ ID NO: 6), GGGSG (SEQ ID NO: 7), and GSSSG (SEQ ID NO: 8).
- LP1 comprises the amino acid sequence GSSGGSGGSGGSG (SEQ ID NO: 9), GSSGGSGGSGG (SEQ ID NO: 10), GSSGGSGGSGGS (SEQ ID NO: 11), GSSGGSGGSGGSGGGS (SEQ ID NO: 155), GSSGGSGGSG (SEQ ID NO: 156), or GSSGGSGGSGS (SEQ ID NO: 157).
- LP2 comprises the amino acid sequence GSS, GGS, GGGS (SEQ ID NO: 158), GSSGT (SEQ ID NO: 12) or GSSG (SEQ ID NO: 13).
- the activatable antibody is an anti-Jagged activatable antibody that includes at least an AB comprising the heavy chain amino acid sequence of SEQ ID NO: 61, 63, 65, 68, 70, 72, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, or 114 and the light chain amino acid sequence of SEQ ID NO: 60, 62, 64, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 105, 107, 109, 1 11, or 1 13; a MM comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 201-263, and 496; and a CM comprising an amino acid sequence selected from the group consisting of SEQ
- the activatable antibody is an anti-Jagged activatable antibody that includes at least an AB comprising the heavy chain amino acid sequence of SEQ ID NO: 61, 63, 65, 68, 70, 72, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 1 10, 112, or 1 14 and the light chain amino acid sequence of SEQ ID NO: 60, 62, 64, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 105, 107, 109, 1 11, or 1 13; a MM comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 201-263, and 496; and a CM comprising an amino acid sequence selected from the group consisting of the sequences presented in Tables
- the anti-Jagged activatable antibody also includes a first linking peptide (LP1) and a second linking peptide (LP2), and the activatable antibody in the uncleaved state has the structural arrangement from N-terminus to C-terminus as follows: MM-LP1-CM-LP2-AB or AB- LP2-CM-LP1-MM.
- each of LP1 and LP2 is a peptide of about 1 to 20 amino acids in length.
- the two linking peptides need not be identical to each other.
- At least one of LP 1 or LP2 comprises an amino acid sequence selected from the group consisting of (GS) n , (GGS) n , (GSGGS) n (SEQ ID NO: 1) and (GGGS) n (SEQ ID NO: 2), where n is an integer of at least one.
- at least one of LP1 or LP2 comprises an amino acid sequence selected from the group consisting of GGSG (SEQ ID NO: 3), GGSGG (SEQ ID NO: 4), GSGSG (SEQ ID NO: 5), GSGGG (SEQ ID NO: 6), GGGSG (SEQ ID NO: 7), and GSSSG (SEQ ID NO: 8).
- LP1 comprises the amino acid sequence
- GSSGGSGGSGGSG SEQ ID NO: 9
- GSSGGSGGSGG SEQ ID NO: 10
- LP2 comprises the amino acid sequence GSS, GGS, GGGS (SEQ ID NO: 158), GSSGT (SEQ ID NO: 12) or GSSG (SEQ ID NO: 13).
- the activatable antibody is an anti-Jagged activatable antibody that includes at least an AB comprising the heavy chain amino acid sequence of SEQ ID NO: 112 and the light chain amino acid sequence of SEQ ID NO: 1 11 ; a MM comprising the amino acid sequence selected of SEQ ID NO: 217; and a CM comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 14-33, and 159.
- the activatable antibody is an anti- Jagged activatable antibody that includes at least an AB comprising the heavy chain amino acid sequence of SEQ ID NO: 1 12 and the light chain amino acid sequence of SEQ ID NO: 1 11 ; a MM comprising the amino acid sequence selected of SEQ ID NO: 217; and a CM comprising an amino acid sequence selected from the group consisting of the sequences presented in Tables 8A-8M.
- the anti- Jagged activatable antibody also includes a first linking peptide (LP1) and a second linking peptide (LP2), and the activatable antibody in the uncleaved state has the structural arrangement from N-terminus to C-terminus as follows: MM-LP 1 -CM-LP2-AB or AB-LP2-CM-LP 1 -MM.
- each of LP1 and LP2 is a peptide of about 1 to 20 amino acids in length.
- the two linking peptides need not be identical to each other.
- At least one of LP1 or LP2 comprises an amino acid sequence selected from the group consisting of (GS) n , (GGS) context, (GSGGS) n (SEQ ID NO: 1) and (GGGS)structure (SEQ ID NO: 2), where n is an integer of at least one.
- at least one of LP1 or LP2 comprises an amino acid sequence selected from the group consisting of GGSG (SEQ ID NO: 3), GGSGG (SEQ ID NO: 4), GSGSG (SEQ ID NO: 5), GSGGG (SEQ ID NO: 6), GGGSG (SEQ ID NO: 7), and GSSSG (SEQ ID NO: 8).
- LP1 comprises the amino acid sequence GSSGGSGGSGGSG (SEQ ID NO: 9), GSSGGSGGSGG (SEQ ID NO: 10),
- LP2 comprises the amino acid sequence GSS, GGS, GGGS (SEQ ID NO: 158), GSSGT (SEQ ID NO: 12) or GSSG (SEQ ID NO: 13).
- the activatable antibody is an anti-Jagged activatable antibody that includes at least an AB comprising a heavy chain amino acid sequence comprising the VH CDR1 sequence of SEQ ID NO: 498, the VH CDR2 sequence of SEQ ID NO: 499, the VH CDR3 sequence of SEQ ID NO: 500, the VL CDR1 sequence of SEQ ID NO: 501, the VL CDR2 sequence of SEQ ID NO: 502, and the VL CDR2 sequence of SEQ ID NO: 503; a MM comprising the amino acid sequence selected from the group consisting of SEQ ID NO: 217; and a CM comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 14-33, and 159.
- the activatable antibody is an anti- Jagged activatable antibody that includes at least an AB comprising a heavy chain amino acid sequence comprising the VH CDR1 sequence of SEQ ID NO: 498, the VH CDR2 sequence of SEQ ID NO: 499, the VH CDR3 sequence of SEQ ID NO: 500, the VL CDR1 sequence of SEQ ID NO: 501, the VL CDR2 sequence of SEQ ID NO: 502, and the VL CDR2 sequence of SEQ ID NO: 503; a MM comprising the amino acid sequence selected from the group consisting of SEQ ID NO: 217; and a CM comprising an amino acid sequence selected from the group consisting of the sequences presented in Tables 8A-8M.
- the anti- Jagged activatable antibody also includes a first linking peptide (LPl) and a second linking peptide (LP2), and the activatable antibody in the uncleaved state has the structural arrangement from N-terminus to C-terminus as follows: MM-LP 1-CM-LP2-AB or AB-LP2-CM-LP 1 -MM.
- each of LPl and LP2 is a peptide of about 1 to 20 amino acids in length.
- the two linking peptides need not be identical to each other.
- At least one of LPl or LP2 comprises an amino acid sequence selected from the group consisting of (GS) protest, (GGS) context, (GSGGS) n (SEQ ID NO: 1) and (GGGS)structure (SEQ ID NO: 2), where n is an integer of at least one.
- at least one of LP 1 or LP2 comprises an amino acid sequence selected from the group consisting of GGSG (SEQ ID NO: 3), GGSGG (SEQ ID NO: 4), GSGSG (SEQ ID NO: 5), GSGGG (SEQ ID NO: 6), GGGSG (SEQ ID NO: 7), and GSSSG (SEQ ID NO: 8).
- LPl comprises the amino acid sequence GSSGGSGGSGGSG (SEQ ID NO: 9), GSSGGSGGSGG (SEQ ID NO: 10), GSSGGSGGSGGS (SEQ ID NO: 11), GSSGGSGGSGGSGGGS (SEQ ID NO: 155), GSSGGSGGSG (SEQ ID NO: 156), or GSSGGSGGSGS (SEQ ID NO: 157).
- LP2 comprises the amino acid sequence GSS, GGS, GGGS (SEQ ID NO: 158), GSSGT (SEQ ID NO: 12) or GSSG (SEQ ID NO: 13).
- the activatable antibody also includes an agent conjugated to the AB.
- the agent is a therapeutic agent.
- the agent is an antineoplastic agent.
- the agent is a toxin or a fragment thereof.
- the agent is conjugated to the AB via a linker.
- the linker is a cleavable linker.
- the agent is a microtubule inhibitor.
- the agent is a nucleic acid damaging agent, such as a DNA alkylator or DNA intercalator, or other DNA damaging agent.
- the linker is a cleavable linker.
- the agent is conjugated to the AB via a linker that includes at least one MMP -cleavable substrate sequence.
- the agent is an agent selected from the group listed in Table 3.
- the agent is a dolastatin.
- the agent is an auristatin or derivative thereof.
- the agent is auristatin E or a derivative thereof.
- the agent is monomethyl auristatin E (MMAE).
- the agent is monomethyl auristatin D (MMAD).
- the agent is a maytansinoid or maytansinoid derivative.
- the agent is DM1 or DM4.
- the agent is a duocarmycin or derivative thereof.
- the agent is a calicheamicin or derivative thereof.
- the agent is a pyrrolobenzodiazepine.
- the agent is an anti-inflammatory agent.
- the activatable antibody also includes a detectable moiety.
- the detectable moiety is a diagnostic agent.
- the conjugated antibody includes a detectable label.
- the detectable label includes an imaging agent, a contrasting agent, an enzyme, a fluorescent label, a chromophore, a dye, one or more metal ions, or a ligand- based label.
- the imaging agent comprises a radioisotope.
- the radioisotope is indium or technetium.
- the contrasting agent comprises iodine, gadolinium or iron oxide.
- the enzyme comprises horseradish peroxidase, alkaline phosphatase, or ⁇ -galactosidase.
- the fluorescent label comprises yellow fluorescent protein (YFP), cyan fluorescent protein (CFP), green fluorescent protein (GFP), modified red fluorescent protein (mRFP), red fluorescent protein tdimer2 (RFP tdimer2), HCRED, or a europium derivative.
- the luminescent label comprises an N- methylacrydium derivative.
- the label comprises an Alexa Fluor ® label, such as Alex Fluor ® 680 or Alexa Fluor ® 750.
- the ligand-based label comprises biotin, avidin, streptavidin or one or more haptens.
- the activatable antibody also includes a signal peptide.
- the signal peptide is conjugated to the activatable antibody via a spacer.
- the spacer is conjugated to the activatable antibody in the absence of a signal peptide.
- the spacer is joined directly to the MM of the activatable antibody.
- the spacer is joined directly to the MM of the activatable antibody in the structural arrangement from N-terminus to C- terminus of spacer-MM-CM-AB.
- An example of a spacer joined directly to the N-terminus of MM of the activatable antibody is QGQSGQ (SEQ ID NO: 53).
- the spacer includes at least the amino acid sequence QGQSGQ (SEQ ID NO: 53).
- the AB of the activatable antibody naturally contains one or more disulfide bonds.
- the AB can be engineered to include one or more disulfide bonds.
- the serum half-life of the activatable antibody is longer than that of the corresponding antibody; e.g., the pK of the activatable antibody is longer than that of the corresponding antibody. In some embodiments, the serum half-life of the activatable antibody is similar to that of the corresponding antibody. In some embodiments, the serum half-life of the activatable antibody is at least 15 days when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 12 days when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 11 days when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 10 days when administered to an organism.
- the serum half-life of the activatable antibody is at least 9 days when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 8 days when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 7 days when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 6 days when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 5 days when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 4 days when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 3 days when administered to an organism.
- the serum half-life of the activatable antibody is at least 2 days when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 24 hours when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 20 hours when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 18 hours when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 16 hours when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 14 hours when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 12 hours when administered to an organism.
- the serum half-life of the activatable antibody is at least 10 hours when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 8 hours when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 6 hours when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 4 hours when administered to an organism. In some embodiments, the serum half-life of the activatable antibody is at least 3 hours when administered to an organism.
- the activatable antibody and/or conjugated activatable antibody is monospecific. In some embodiments, the activatable antibody and/or conjugated activatable antibody is multispecific, e.g., by way of non-limiting example, bispecific or trifunctional. In some embodiments, the activatable antibody and/or conjugated activatable antibody is formulated as part of a pro-Bispecific T Cell Engager (pro-BITE) molecule. In some embodiments, the activatable antibody and/or conjugated activatable antibody is formulated as part of a pro-Chimeric Antigen Receptor (pro-CAR) modified T cell or other engineered receptor.
- pro-BITE pro-Bispecific T Cell Engager
- pro-CAR pro-Chimeric Antigen Receptor
- compositions and methods that include an activatable antibody that includes an antibody or antibody fragment (AB) that specifically binds a given target, where the AB is coupled to a masking moiety (MM) that decreases the ability of the AB to bind its target.
- the activatable antibody further includes a cleavable moiety (CM) that is a substrate for at least one MMP.
- CM cleavable moiety
- compositions and methods provided herein enable the attachment of one or more agents to one or more cysteine residues in the AB without reducing or otherwise disturbing one or more disulfide bonds within the MM.
- the compositions and methods provided herein produce an activatable antibody that is conjugated to one or more agents, e.g., any of a variety of therapeutic, diagnostic and/or prophylactic agents, for example, in some embodiments, without any of the agent(s) being conjugated to the MM of the activatable antibody.
- the compositions and methods provided herein produce conjugated activatable antibodies in which the MM retains the ability to effectively and efficiently mask the AB of the activatable antibody in an uncleaved state.
- the compositions and methods provided herein produce conjugated activatable antibodies in which the activatable antibody is still activated, i.e., cleaved, in the presence of a MMP that can cleave the CM.
- the activatable antibodies have at least one point of conjugation for an agent, but in the methods and compositions provided herein less than all possible points of conjugation are available for conjugation to an agent.
- the one or more points of conjugation are sulfur atoms involved in disulfide bonds.
- the one or more points of conjugation are sulfur atoms involved in interchain disulfide bonds.
- the one or more points of conjugation are sulfur atoms involved in interchain sulfide bonds, but not sulfur atoms involved in intrachain disulfide bonds.
- the one or more points of conjugation are sulfur atoms of cysteine or other amino acid residues containing a sulfur atom. Such residues may occur naturally in the antibody structure or may be incorporated into the antibody by site- directed mutagenesis, chemical conversion, or mis-incorporation of non-natural amino acids.
- the method generally includes partially reducing interchain disulfide bonds in the activatable antibody with a reducing agent, such as, for example, TCEP; and conjugating the drug reactive with free thiols to the partially reduced activatable antibody.
- a reducing agent such as, for example, TCEP
- conjugating the drug reactive with free thiols to the partially reduced activatable antibody As used herein, the term partial reduction refers to situations where an activatable antibody is contacted with a reducing agent and less than all disulfide bonds, e.g., less than all possible sites of conjugation are reduced.
- a method of reducing and conjugating an agent, e.g., a drug, to an activatable antibody resulting in selectivity in the placement of the agent is provided.
- the method generally includes partially reducing the activatable antibody with a reducing agent such that any conjugation sites in the masking moiety or other non-AB portion of the activatable antibody are not reduced, and conjugating the agent to interchain thiols in the AB.
- the conjugation site(s) are selected so as to allow desired placement of an agent to allow conjugation to occur at a desired site.
- the reducing agent is, for example, TCEP.
- the reduction reaction conditions such as, for example, the ratio of reducing agent to activatable antibody, the length of incubation, the temperature during the incubation, the pH of the reducing reaction solution, etc., are determined by identifying the conditions that produce a conjugated activatable antibody in which the MM retains the ability to effectively and efficiently mask the AB of the activatable antibody in an uncleaved state.
- the ratio of reduction agent to activatable antibody will vary depending on the activatable antibody.
- the ratio of reducing agent to activatable antibody will be in a range from about 20:1 to 1:1, from about 10:1 to 1:1, from about 9:1 to 1:1, from about 8:1 to 1:1, from about 7:1 to 1:1, from about 6:1 to 1:1, from about 5:1 to 1:1, from about 4:1 to 1:1, from about 3:1 to 1:1, from about 2:1 to 1:1, from about 20: 1 to 1:1.5, from about 10:1 to 1:1.5, from about 9:1 to 1:1.5, from about 8:1 to 1:1.5, from about 7:1 to 1:1.5, from about 6: 1 to 1 : 1.5, from about 5 : 1 to 1 : 1.5, from about 4:1 to 1:1.5, from about 3:1 to 1:1.5, from about 2:1 to 1:1.5, from about 1.5:1 to 1:1.5, or from about 1:1 to 1:1.5.
- the ratio is in a range of from about 5 : 1 to 1 : 1. In some embodiments, the ratio is in a range of from about 5:1 to 1.5:1. In some embodiments, the ratio is in a range of from about 4: 1 to 1 : 1. In some embodiments, the ratio is in a range from about 4: 1 to 1.5: 1. In some embodiments, the ratio is in a range from about 8:1 to about 1:1. In some embodiments, the ratio is in a range of from about 2.5:1 to 1:1.
- a method of reducing interchain disulfide bonds in the AB of an activatable antibody and conjugating an agent, e.g., a thiol-containing agent such as a drug, to the resulting interchain thiols to selectively locate agent(s) on the AB is provided.
- the method generally includes partially reducing the AB with a reducing agent to form at least two interchain thiols without forming all possible interchain thiols in the activatable antibody; and conjugating the agent to the interchain thiols of the partially reduced AB.
- the AB of the activatable antibody is partially reduced for about 1 hour at about 37°C at a desired ratio of reducing agent: activatable antibody.
- the ratio of reducing agent to activatable antibody will be in a range from about 20:1 to 1:1, from about 10:1 to 1:1, from about 9:1 to 1:1, from about 8:1 to 1:1, from about 7:1 to 1:1, from about 6:1 to 1:1, from about 5:1 to 1:1, from about 4:1 to 1:1, from about 3:1 to 1:1, from about 2:1 to 1:1, from about 20:1 to 1:1.5, from about 10:1 to 1:1.5, from about 9:1 to 1:1.5, from about 8:1 to 1:1.5, from about 7:1 to 1:1.5, from about 6:1 to 1:1.5, from about 5 : 1 to 1 : 1.5, from about 4: 1 to 1 : 1.5, from about 3 : 1 to 1 : 1.5, from about 2:1 to 1:1.5, from about 1.5:1 to 1:1.5, or from about 1:1 to 1:1.5.
- the ratio is in a range of from about 5: 1 to 1 : 1. In some embodiments, the ratio is in a range of from about 5:1 to 1.5:1. In some embodiments, the ratio is in a range of from about 4:1 to 1:1. In some embodiments, the ratio is in a range from about 4:1 to 1.5:1. In some embodiments, the ratio is in a range from about 8:1 to about 1:1. In some embodiments, the ratio is in a range of from about 2.5: 1 to 1 : 1.
- the thiol-containing reagent can be, for example, cysteine or N-acetyl cysteine.
- the reducing agent can be, for example, TCEP.
- the reduced activatable antibody can be purified prior to conjugation, using for example, column chromatography, dialysis, or diafiltration. In some embodiments, the reduced antibody is not purified after partial reduction and prior to conjugation.
- the disclosure also provides partially reduced activatable antibodies in which at least one interchain disulfide bond in the activatable antibody has been reduced with a reducing agent without disturbing any intrachain disulfide bonds in the activatable antibody, wherein the activatable antibody includes an antibody or an antigen binding fragment thereof (AB) that specifically binds to the target, a masking moiety (MM) that inhibits the binding of the AB of the activatable antibody in an uncleaved state to the target, and a cleavable moiety (CM) coupled to the AB, wherein the CM is a polypeptide that functions as a substrate for at least one MMP.
- the MM is coupled to the AB via the CM.
- one or more intrachain disulfide bond(s) of the activatable antibody is not disturbed by the reducing agent. In some embodiments, one or more intrachain disulfide bond(s) of the MM within the activatable antibody is not disturbed by the reducing agent. In some embodiments, the activatable antibody in the uncleaved state has the structural arrangement from N-terminus to C-terminus as follows: MM-CM-AB or AB-CM-MM. In some embodiments, reducing agent is TCEP.
- the disclosure also provides partially reduced activatable antibodies, including but not limited to multispecific activatable antibodies of the disclosure, in which at least one interchain disulfide bond in the activatable antibody has been reduced with a reducing agent without disturbing or otherwise compromising the activity and/or efficacy of the activatable antibody, wherein the activatable antibody includes an antibody or an antigen binding fragment thereof (AB) that specifically binds to a target, a masking moiety (MM) that inhibits the binding of the AB of the activatable antibody in an uncleaved state to the target, and a cleavable moiety (CM) coupled to the AB, and the CM is a polypeptide that functions as a substrate for a protease.
- the activity and/or efficacy of the activatable antibody is, by way of nonlimiting example, masking activity, activation of the activatable antibody, and/or binding activity of the activated activatable antibody.
- one or more intrachain disulfide bond(s) of the activatable antibody is not disturbed by the reducing agent. In some embodiments, one or more intrachain disulfide bond(s) of the MM within the activatable antibody is not disturbed by the reducing agent. In some embodiments, the activatable antibody in the uncleaved state has the structural arrangement from N-terminus to C-terminus as follows: MM-CM-AB or AB-CM-MM. In some embodiments, reducing agent is TCEP.
- the disclosure also provides conjugated activatable antibodies that include an activatable antibody linked to monomethyl auristatin D (MMAD) payload, wherein the activatable antibody includes an antibody or an antigen binding fragment thereof (AB) that specifically binds to a target, a masking moiety (MM) that inhibits the binding of the AB of the activatable antibody in an uncleaved state to the target, and cleavable moiety (CM) coupled to the AB, and the CM is a polypeptide that functions as a substrate for at least one MMP protease.
- MMAD monomethyl auristatin D
- the MMAD-conjugated activatable antibody can be conjugated using any of several methods for attaching agents to ABs: (a) attachment to the carbohydrate moieties of the AB, or (b) attachment to sulfhydryl groups of the AB, or (c) attachment to amino groups of the AB, or (d) attachment to carboxylate groups of the AB.
- the MMAD payload is conjugated to the AB via a linker. In some embodiments, the MMAD payload is conjugated to a cysteine in the AB via a linker. In some embodiments, the MMAD payload is conjugated to a lysine in the AB via a linker. In some embodiments, the MMAD payload is conjugated to another residue of the AB via a linker, such as those residues disclosed herein. In some embodiments, the linker is a thiol-containing linker. In some embodiments, the linker is a cleavable linker. In some embodiments, the linker is a non-cleavable linker.
- the linker is selected from the group consisting of the linkers shown in Tables 5 and 6.
- the activatable antibody and the MMAD payload are linked via a maleimide caproyl-valine-citrulline linker.
- the activatable antibody and the MMAD payload are linked via a maleimide PEG-valine-citrulline linker.
- the activatable antibody and the MMAD payload are linked via a maleimide caproyl-valine-citrulline-para-aminobenzyloxycarbonyl linker.
- the activatable antibody and the MMAD payload are linked via a maleimide PEG-valine- citrulline-para-aminobenzyloxycarbonyl linker.
- the MMAD payload is conjugated to the AB using the partial reduction and conjugation technology disclosed herein.
- the target is selected from the group of targets listed in Table 1.
- the target is EGFR.
- the target is a Jagged protein, e.g., Jagged 1 and/or Jagged 2.
- the target is interleukin 6 receptor (IL-6R).
- the AB is or is derived from an antibody selected from the group of antibodies listed in Table 2.
- the antigen binding fragment thereof is selected from the group consisting of a Fab fragment, a F(ab')2 fragment, a scFv, a scAb, a dAb, a single domain heavy chain antibody, and a single domain light chain antibody.
- the AB has an equilibrium dissociation constant of about 100 nM or less for binding to the target. In some embodiments, the MM has an equilibrium dissociation constant for binding to the AB that is greater than the equilibrium dissociation constant of the AB to the target. In some embodiments, the MM does not interfere or compete with the AB of the activatable antibody in a cleaved state for binding to the target. In some embodiments, the MM is a polypeptide of no more than 40 amino acids in length. In some embodiments, the MM polypeptide sequence is different from that of the target, and the MM polypeptide sequence is no more than 50% identical to any natural binding partner of the AB.
- the MM does not include more than 25% amino acid sequence identity to the target. In some embodiments, the MM does not include more than 10% amino acid sequence identity to the target. In some embodiments, the CM is a polypeptide of up to 15 amino acids in length. In some embodiments, the MMP protease is co-localized with the target in a tissue, and the MMP protease cleaves the CM in the activatable antibody when the activatable antibody is exposed to the MMP protease. In some embodiments, the MMP protease is a MMP9 protease. In some embodiments, the MMP protease is a MMP 14 protease.
- the activatable antibody includes a linking peptide between the MM and the CM. In some embodiments, the activatable antibody includes a linking peptide between the CM and the AB. In some embodiments, the activatable antibody includes a first linking peptide (LP1) and a second linking peptide (LP2), and the activatable antibody in an uncleaved state has the structural arrangement from N-terminus to C-terminus as follows: MM-LP 1 -CM-LP2-AB or AB-LP2-CM-LP 1 -MM. In some embodiments, the two linking peptides need not be identical to each other. In some embodiments, each of LP1 and LP2 is a peptide of about 1 to 20 amino acids in length.
- At least one of LP 1 or LP2 includes an amino acid sequence selected from the group consisting of (GS) n , (GGS) context, (GSGGS) n (SEQ ID NO: 1) and (GGGS)structure (SEQ ID NO: 2), where n is an integer of at least one.
- at least one of LP 1 or LP2 includes an amino acid sequence selected from the group consisting of GGSG (SEQ ID NO: 3), GGSGG (SEQ ID NO: 4), GSGSG (SEQ ID NO: 5), GSGGG (SEQ ID NO: 6), GGGSG (SEQ ID NO: 7), and GSSSG (SEQ ID NO: 8).
- the activatable antibody includes a second CM; in some embodiments, the second CM is a substrate for an enzyme selected from the group consisting of those shown in Table 7.
- the disclosure also provides polypeptides and other larger molecules that include one or more of the MMP-cleavable substrate sequences presented herein.
- the MMP-cleavable substrate sequences presented herein are useful in prodrug compositions and methods of use thereof.
- These MMP-cleavable substrate sequences presented herein are also useful in probes and other detection agents and methods of use thereof.
- the MMP-cleavable substrate sequences presented herein can be used in conjunction with fluors and other quenchers to produce detection agents, such as imaging agents and/or other diagnostic agents.
- MMP-cleavable substrate sequences presented herein are useful in any composition and/or method in the art that would use a substrate that is cleavable by one or more MMPs, such as MMP9 and/or MMP 14.
- the disclosure also provides an isolated nucleic acid molecule encoding an antibody and/or an activatable antibody described herein, as well as vectors that include these isolated nucleic acid sequences.
- the disclosure provides methods of producing an antibody and/or activatable antibody by culturing a cell under conditions that lead to expression of the antibody and/or activatable antibody, wherein the cell comprises such a vector.
- the disclosure provides a method of manufacturing a conjugated antibody of the disclosure that bind a given target by (a) culturing a cell comprising a nucleic acid construct that encodes the antibody under conditions that lead to expression of the antibody, (i) wherein the antibody includes a cleavable moiety (CM), and (ii) wherein the CM is a polypeptide that functions as a substrate for a matrix metalloprotease; (b) recovering the antibody; and (c) conjugating the recovered antibody to one or more additional agents.
- CM cleavable moiety
- the disclosure also provides a method of manufacturing the activatable antibodies of the disclosure that bind in an activated state a given target by (a) culturing a cell comprising a nucleic acid construct that encodes the activatable antibody under conditions that lead to expression of the activatable antibody, wherein the activatable antibody comprises a masking moiety (MM), a cleavable moiety (CM), and an antibody or an antigen binding fragment thereof (AB) that specifically binds the target, (i) wherein the CM is a polypeptide that functions as a substrate for a MMP; and (ii) wherein the CM is positioned in the activatable antibody such that, in an uncleaved state, the MM interferes with specific binding of the AB to the target and in a cleaved state the MM does not interfere or compete with specific binding of the AB to the target; and (b) recovering the activatable antibody.
- MM masking moiety
- CM cleavable moiety
- AB
- the disclosure provides methods of preventing, delaying the progression of, treating, alleviating a symptom of, or otherwise ameliorating a target-related disease in a subject by administering a therapeutically effective amount of a conjugated antibody, an activatable antibody and/or a conjugated activatable antibody described herein to a subject in need thereof.
- the disclosure provides methods of preventing, delaying the progression of, treating, alleviating a symptom of, or otherwise ameliorating inflammation and/or an inflammatory disorder in a subject by administering a therapeutically effective amount of a conjugated antibody, an activatable antibody and/or a conjugated activatable antibody described herein to a subject in need thereof.
- the disclosure also provides methods of preventing, delaying the progression of, treating, alleviating a symptom of, or otherwise ameliorating cancer in a subject by administering a therapeutically effective amount of a conjugated antibody, an activatable antibody and/or a conjugated activatable antibody described herein to a subject in need thereof.
- the disclosure also provides methods of preventing, delaying the progression of, treating, alleviating a symptom of, or otherwise ameliorating an autoimmune disease in a subject by administering a therapeutically effective amount a conjugated antibody, an activatable antibody and/or a conjugated activatable antibody described herein to a subject in need thereof.
- a conjugated antibody, an activatable antibody and/or a conjugated activatable antibody used in any of the embodiments of these methods and uses can be administered at any stage of the disease.
- a conjugated antibody, activatable antibody and/or conjugated activatable antibody can be administered to a patient suffering cancer of any stage, from early to metastatic.
- the terms subject and patient are used interchangeably herein.
- the subject is a mammal, such as a human, non- human primate, companion animal (e.g., cat, dog, horse), farm animal, work animal, or zoo animal.
- the subject is a rodent.
- the subject is a human.
- the subject is a companion animal.
- the subject is an animal in the care of a veterinarian.
- the conjugated antibody, activatable antibody and/or conjugated activatable antibody and therapeutic formulations thereof are administered to a subject suffering from or susceptible to a disease or disorder associated with aberrant target expression and/or activity.
- a subject suffering from or susceptible to a disease or disorder associated with aberrant target expression and/or activity is identified using any of a variety of methods known in the art.
- subjects suffering from cancer or other neoplastic condition are identified using any of a variety of clinical and/or laboratory tests such as, physical examination and blood, urine and/or stool analysis to evaluate health status.
- subjects suffering from inflammation and/or an inflammatory disorder are identified using any of a variety of clinical and/or laboratory tests such as physical examination and/or bodily fluid analysis, e.g., blood, urine and/or stool analysis, to evaluate health status.
- a conjugated antibody, an activatable antibody and/or a conjugated activatable antibody to a patient suffering from a disease or disorder associated with aberrant target expression and/or activity is considered successful if any of a variety of laboratory or clinical objectives is achieved.
- administration of a conjugated antibody, an activatable antibody and/or a conjugated activatable antibody to a patient suffering from a disease or disorder associated with aberrant target expression and/or activity is considered successful if one or more of the symptoms associated with the disease or disorder is alleviated, reduced, inhibited or does not progress to a further, i.e., worse, state.
- a conjugated antibody, an activatable antibody and/or a conjugated activatable antibody to a patient suffering from a disease or disorder associated with aberrant target expression and/or activity is considered successful if the disease or disorder enters remission or does not progress to a further, i.e., worse, state.
- the conjugated antibody, activatable antibody and/or conjugated activatable antibody is administered during and/or after treatment in
- an anti-inflammatory agent such as, by way of non-limiting example, an immunosuppressive agent, a chemotherapeutic agent, such as an alkylating agent, an anti-metabolite, an anti-microtubule agent, a topoisomerase inhibitor, a cytotoxic antibiotic, and/or any other nucleic acid damaging agent.
- the additional agent is a taxane, such as paclitaxel (e.g., Abraxane®).
- the additional agent is an anti-metabolite, such as gemcitabine.
- the additional agent is an alkylating agent, such as platinum-based chemotherapy, such as carboplatin or cisplatin.
- the additional agent is a targeted agent, such as a kinase inhibitor, e.g., sorafenib or erlotinib.
- the additional agent is a targeted agent, such as another antibody, e.g., a monoclonal antibody (e.g., bevacizumab), a bispecific antibody, or a multispecific antibody.
- the additional agent is a proteosome inhibitor, such as bortezomib or carfilzomib.
- the additional agent is an immune modulating agent, such as lenolidominde or IL-2.
- the additional agent is radiation.
- the additional agent is an agent considered standard of care by those skilled in the art.
- the additional agent is a chemotherapeutic agent well known to those skilled in the art.
- the additional agent is an antibody, another conjugated antibody, another activatable antibody and/or another conjugated activatable antibody.
- the conjugated antibody, activatable antibody and/or conjugated activatable antibody and the additional agent(s) are administered
- the conjugated antibody, activatable antibody and/or conjugated activatable antibody and the additional agent(s) can be formulated in a single composition or administered as two or more separate compositions.
- the conjugated antibody, activatable antibody and/or conjugated activatable antibody and the additional agent(s) are administered sequentially, or the antibody and/or conjugated antibodies and the additional agent are administered at different times during a treatment regimen.
- the antibody and/or conjugated antibodies is administered prior to the administration of the additional agent, the antibody and/or conjugated antibodies is administered subsequent to the administration of the additional agent, or the antibody and/or conjugated antibodies and the additional agent are administered in an alternating fashion.
- the antibody and/or conjugated antibodies and additional agent are administered in single doses or in multiple doses.
- the CM is linked or otherwise attached to an activatable antibody that includes an antibody or antigen-binding fragment thereof that specifically binds a given target coupled to a masking moiety (MM), such that coupling of the MM to the AB reduces the ability of the antibody or antigen-binding fragment thereof to bind the target.
- the MM is coupled via the CM.
- Exemplary targets include, but are not limited to the targets shown in Table 1.
- Exemplary ABs include, but are not limited to, the targets shown in Table 2.
- the activatable antibodies provided herein are stable in circulation, activated at intended sites of therapy and/or diagnosis but not in normal, e.g., healthy tissue or other tissue not targeted for treatment and/or diagnosis, and, when activated, exhibit binding to the target that is at least comparable to the corresponding, unmodified antibody.
- the disclosure also provides methods and kits for using the conjugated antibodies, activatable antibodies and/or conjugated activatable antibodies in a variety of diagnostic and/or prophylactic indications.
- the disclosure provides methods and kits for detecting presence or absence of a cleaving agent and a target of interest in a subject or a sample by (i) contacting a subject or sample with an activatable antibody, wherein the activatable antibody comprises a masking moiety (MM), a cleavable moiety (CM) that is cleaved by the cleaving agent, and an antigen binding domain or fragment thereof (AB) that specifically binds the target of interest, wherein the activatable antibody in an uncleaved, non-activated state comprises a structural arrangement from N-terminus to C-terminus as follows: MM- CM-AB or AB-CM-MM; (a) wherein the MM is a peptide that inhibits binding of the AB to the target, and wherein the MM does not have an amino acid sequence of a naturally occurring binding partner of the AB and is not a modified form of a natural binding partner of the AB; and (b) wherein, in
- the activatable antibody is an activatable antibody to which a therapeutic agent is conjugated. In some embodiments, the activatable antibody is not conjugated to an agent. In some embodiments, the activatable antibody comprises a detectable label. In some embodiments, the detectable label is positioned on the AB. In some embodiments, measuring the level of activatable antibody in the subject or sample is accomplished using a secondary reagent that specifically binds to the activated antibody, wherein the reagent comprises a detectable label. In some embodiments, the secondary reagent is an antibody comprising a detectable label.
- the activatable antibody includes a detectable label.
- the detectable label includes an imaging agent, a contrasting agent, an enzyme, a fluorescent label, a chromophore, a dye, one or more metal ions, or a ligand-based label.
- the imaging agent comprises a radioisotope.
- the radioisotope is indium or technetium.
- the contrasting agent comprises iodine, gadolinium or iron oxide.
- the enzyme comprises horseradish peroxidase, alkaline phosphatase, or ⁇ -galactosidase.
- the fluorescent label comprises yellow fluorescent protein (YFP), cyan fluorescent protein (CFP), green fluorescent protein (GFP), modified red fluorescent protein (mRFP), red fluorescent protein tdimer2 (RFP tdimer2), HCRED, or a europium derivative.
- the luminescent label comprises an - methylacrydium derivative.
- the label comprises an Alexa Fluor ® label, such as Alex Fluor ® 680 or Alexa Fluor ® 750.
- the ligand-based label comprises biotin, avidin, streptavidin or one or more haptens. [000175]
- the subject is a mammal. In some embodiments of these methods, the subject is a human.
- the subject is a non-human mammal, such as a non-human primate, companion animal (e.g., cat, dog, horse), farm animal, work animal, or zoo animal.
- the subject is a rodent.
- the subject is a human.
- the subject is a companion animal.
- the subject is an animal in the care of a veterinarian.
- the method is an in vivo method. In some embodiments of these methods, the method is an in situ method. In some embodiments of these methods, the method is an ex vivo method. In some embodiments of these methods, the method is an in vitro method.
- the method is used to identify or otherwise refine a patient population suitable for treatment with an activatable antibody of the disclosure, followed by treatment by administering that activatable antibody and/or conjugated activatable antibody to a subject in need thereof.
- patients that test positive for both the target and at least one MMP that cleaves the substrate in the cleavable moiety (CM) of the activatable antibody being tested in these methods are identified as suitable candidates for treatment with such an activatable antibody comprising such a CM, and the patient is then administered a therapeutically effective amount of the activatable antibody and/or conjugated activatable antibody that was tested.
- CM cleavable moiety
- patients that test negative for either or both of the target and the MMP that cleaves the substrate in the CM in the activatable antibody being tested using these methods might be identified as suitable candidates for another form of therapy.
- such patients can be tested with other activatable antibodies until a suitable activatable antibody for treatment is identified (e.g., an activatable antibody comprising a CM that is cleaved by the patient at the site of disease).
- the patient is then administered a therapeutically effective amount of the activatable antibody and/or conjugated for which the patient tested positive.
- compositions according to the disclosure can include an antibody of the disclosure and a carrier. These pharmaceutical compositions can be included in kits, such as, for example, diagnostic kits. Brief Description of the Drawings
- Figures 1 A and IB are a series of graphs depicting the ability of the activatable anti-EGFR antibody containing a masking moiety comprising amino acid sequence CISPRGCPDGPYVMY (SEQ ID NO: 160), a cleavage moiety comprising the MMP14 substrate 520 (also referred to herein as MN520) ISSGLLSS (SEQ ID NO: 14), and the heavy and light chains of the anti-EGFR antibody C225v5, where the entire activatable antibody construct is referred to herein as Pb-MN520, to inhibit tumor growth in the H292 xenograft lung cancer model.
- CISPRGCPDGPYVMY SEQ ID NO: 160
- MN520 cleavage moiety comprising the MMP14 substrate 520
- ISSGLLSS SEQ ID NO: 14
- Pb-MN520 the entire activatable antibody construct
- Figures 2A and 2B are a series of graphs depicting cleavage of the substrate pool referred to herein as SMP87 by 5 nM MMP9.
- Figures 3A and 3B are a series of graphs depicting cleavage of substrate sequence VAGRSMRP (SEQ ID NO: 484) by 5 nM MMP9.
- Figure 4 is a graph depicting correlation of substrate sequence frequency and function.
- Figures 5A and 5B are a series of graphs depicting cleavage of the substrate pool SMP39 by 60 nM MMP 14.
- Figures 6A and 6B are a series of graphs depicting cleavage of the substrate sequence QNQALRMA (SEQ ID NO: 15) by 30 nM MMP14.
- Figures 7A and 7B are a series of schematic representations of the peptide display platforms used in the working examples provided herein.
- Figure 7A is a schematic representation of the sequence of the display platform referred to herein as "Display Platform CYTX-DP-XXXXXXX” or "CYTX-DP-XXXXXXXX” (SEQ ID NO: 512).
- Figure 7B is a schematic representation of the sequence of the display platform referred to herein as "Display Platform SP-CYTX-DP-XXXXXXXXX” or "SP-CYTX-DP- XXXXXXXX” (SEQ ID NO: 513), where SP-CYTX-DP-XXXXXXXX (SEQ ID NO: 513) is the CYTX-DP-XXXXXXX (SEQ ID NO: 512) platform with a signal peptide.
- CM cleavable moiety
- MMP matrix metalloprotease
- Table 9 depicts (a) the percentage of MMP9-selected substrates tested in the CYTX-DP display platform that exhibited at least 20% cleavage when incubated with 50 nM human MMP9 for 1 hour at 37°C in 50 mM Tris-HCl, pH 7.4, supplemented with 150 mM NaCl, 10 mM CaCl 2 , and 0.05% (w/v) Brij-35 (>20% Cleavage with 50 nM MMP 9); (b) the percentage of MMP 14-selected substrates tested in the CYTX-DP display platform that exhibited at least 20% cleavage when incubated with 50 nM human MMP 14 for 1 hour at 37°C in 50 mM HEPES, pH 6.8, supplemented with 10 mM
- a MMP9 substrate when displayed in the CYTX-DP platform exhibits at least 20% cleavage when incubated with 50 nM human MMP9 for 1 hour at 37°C in 50 mM Tris-HCl, pH 7.4, supplemented with 150 mM NaCl, 10 mM CaCl 2 , and 0.05% (w/v) Brij-35.
- a MMP9 substrate when displayed in the CYTX-DP platform exhibits less than 20% cleavage when incubated with 500 pM human plasmin for 1 hour at 37°C in 50 mM Tris-HCl, pH 7.4, supplemented with 100 mM NaCl, 0.01% Tween20 and 1 mM EDTA.
- a MMP9 substrate when displayed in the CYTX-DP platform exhibits at least 20% cleavage when incubated with 50 nM human MMP9 for 1 hour at 37°C in 50 mM Tris-HCl, pH 7.4, supplemented with 150 mM NaCl, 10 mM CaCl 2 , and 0.05% (w/v) Brij-35 and exhibits less than 20% cleavage when incubated with 500 pM human plasmin for 1 hour at 37°C in 50 mM Tris-HCl, pH 7.4, supplemented with 100 mM NaCl, 0.01% Tween20 and 1 mM EDTA.
- a MMP14 substrate exhibits at least 20% cleavage when incubated with 50 nM human MMP 14 for 1 hour at 37°C in 50 mM HEPES, pH 6.8, supplemented with 10 mM CaCl 2 , and 0.5 mM MgCl 2 .
- a MMP14 substrate when displayed in the CYTX-DP platform exhibits less than 20% cleavage when incubated with 500 pM human plasmin for 1 hour at 37°C in 50 mM Tris-HCl, pH 7.4, supplemented with 100 mM NaCl, 0.01% Tween20 and 1 mM EDTA.
- a MMP 14 substrate exhibits at least 20% cleavage when incubated with 50 nM human MMP 14 for 1 hour at 37°C in 50 mM HEPES, pH 6.8, supplemented with 10 mM CaCl 2 , and 0.5 mM MgC3 ⁇ 4 and exhibits less than 20% cleavage when incubated with 500 pM human plasmin for 1 hour at 37°C in 50 mM Tris-HCl, pH 7.4, supplemented with 100 mM aCl, 0.01% Tween20 and 1 mM EDTA.
- the observed k ca t/K M value of a substrate in an activatable antibody for MMP9 is greater than 100 M ' V 1 . In some embodiments, the observed kcat M value of a substrate in an activatable antibody for MMP9 is greater than 1,000 M Y 1 . In some embodiments, the observed kcat M value of a substrate in an activatable antibody for MMP9 is greater than 10,000 M ' V 1 .
- the observed k ca t/K M value of a substrate in an activatable antibody for MMP14 is greater than 100 M ' V 1 . In some embodiments, the observed kcat/KM value of a substrate in an activatable antibody for MMP14 is greater than 1,000 M ' V 1 . In some embodiments, the observed kcat/KM value of a substrate in an activatable antibody for MMP14 is greater than 10,000 M ' V 1 .
- the disclosure also provides antibodies that include one or more of these MMP-cleavable substrates.
- these MMP-cleavable substrates are useful when conjugating antibodies to one or more additional agents to produce conjugated antibodies.
- These MMP-cleavable are useful in activatable antibody constructs.
- the conjugated antibodies and/or activatable antibodies include an antibody or antigen-binding fragment thereof (AB) that specifically binds a target.
- AB antibody or antigen-binding fragment thereof
- targets of an AB include, but are not necessarily limited to, cell surface receptors and secreted binding proteins (e.g., growth factors), soluble enzymes, structural proteins (e.g. collagen, fibronectin) and the like.
- conjugated antibodies and/or activatable antibodies have an AB that binds an extracellular target, usually an extracellular protein target.
- conjugated antibodies and/or activatable antibodies are designed for cellular uptake and are switchable inside a cell.
- the AB is a binding partner for any target listed in Table 1.
- the AB is or is derived from an antibody listed in Table 2.
- AvastinTM (bevacizumab) VEGF
- LucentisTM (ranibizumab) VEGF
- HumiraTM (adalimumab) TNFa
- RaptivaTM (efalizumab) CD l la
- AdcetrisTM (brentuximab vedotin) CD30
- HerceptinTM (trastuzumab) Her2
- KadcylaTM (trastuzumab emtansine) Her2
- OrenciaTM (abatacept) CTLA-4
- Notch e.g., Notch 1
- StelaraTM (ustekinumab) IL-12/IL-23
- Exemplary conjugated antibodies and/or activatable antibodies of the disclosure include, for example, antibodies that bind interleukin 6 receptor (IL-6R) and that include a heavy chain and a light chain that are, or are derived from, the antibody referred to herein as the"Avl" antibody, which binds interleukin-6 receptor (IL-6R).
- IL-6R interleukin 6 receptor
- the amino acid sequences for the Avl heavy chain and the Avl light chain are shown below in SEQ ID NO: 54 and SEQ ID NO: 55, respectively.
- Exemplary conjugated antibodies and/or activatable antibodies of the disclosure include, for example, antibodies that bind interleukin 6 receptor (IL-6R) and that include a heavy chain and a light chain that are, or are derived from, the Avl antibody and a masking moiety.
- exemplary conjugated antibodies and/or activatable antibodies of the disclosure include an amino acid sequence attached to the N-terminus of the AVI light chain. These N-terminal amino acid sequences include, for example,
- YGSCSWNYVHIFMDC (SEQ ID NO: 161); QGDFDIPFPAHWVPIT (SEQ ID NO: 162); MGVPAGCVWNYAHIFMDC (SEQ ID NO: 163); QGQSGQYGSCSWNYVHIFMDC (SEQ ID NO: 164); QGQSGQGDFDIPFPAHWVPIT (SEQ ID NO: 165); or
- QGQSGQMGVPAGCVWNYAHIFMDC (SEQ ID NO: 166). It is also to be appreciated that such amino acid sequences can be attached to the N-terminus of the AVI heavy chain or to the C-terminus of the AVI heavy or light chain.
- Exemplary activatable antibodies of the disclosure include, for example, antibodies that bind Epidermal Growth Factor Receptor (EGFR) and that include a heavy chain and a light chain that are, or are derived from, an antibody selected from the group consisting of the antibody referred to herein as the"c225v5" antibody, the antibody referred to herein as the"c225v4" antibody, and the antibody referred to herein as the"c225v6" antibody, each of which binds EGFR.
- EGFR Epidermal Growth Factor Receptor
- the c225v5 antibody, the c225v4 antibody, and the c225v6 antibody share the same light chain sequence, referred to herein as "c225 light chain.”
- the amino acid sequences for the c225v5 heavy chain, the c225v4 antibody, the c225v6 antibody, and the c225 light chain are shown below.
- Exemplary conjugated antibodies and/or activatable antibodies of the disclosure include, for example, antibodies that bind a Jagged target, e.g., Jagged- 1, Jagged- 2 and/or both Jagged- 1 and Jagged-2, and that include a combination of a variable heavy chain region and a variable light chain region that are, or are derived from, the variable heavy chain and variable light chain sequences shown below.
- a Jagged target e.g., Jagged- 1, Jagged- 2 and/or both Jagged- 1 and Jagged-2
- Exemplary conjugated antibodies and/or activatable antibodies of the disclosure include, for example, antibodies that bind a Jagged target, e.g., Jagged- 1, Jagged- 2 and/or both Jagged- 1 and Jagged-2, and that include a combination of a heavy chain region and a light chain region that are, or are derived from, the heavy chain and light chain sequences shown below.
- a Jagged target e.g., Jagged- 1, Jagged- 2 and/or both Jagged- 1 and Jagged-2
- the activatable antibodies and activatable antibody compositions provided herein contain at least an antibody or antibody fragment thereof (collectively referred to as AB throughout the disclosure) that specifically binds a target, e.g., a human target, wherein the AB is modified by a masking moiety (MM).
- AB an antibody or antibody fragment thereof
- MM masking moiety
- the masking moiety is selected for use with a specific antibody or antibody fragment.
- suitable masking moieties for use with antibodies that bind EGFR include MMs that include the sequence CISPRG (SEQ ID NO: 167).
- the MM can include a sequence such as CISPRGC (SEQ ID NO: 497); CISPRGCG (SEQ ID NO: 168); CISPRGCPDGPYVMY (SEQ ID NO: 160); CISPRGCPDGPYVM (SEQ ID NO: 169), CISPRGCEPGTYVPT (SEQ ID NO: 170) and CISPRGCPGQIWHPP (SEQ ID NO: 171).
- Suitable masking moieties include any of the EGFR-specific masks disclosed in PCT Publication No. WO 2010/081 173, such as, by way of non-limiting example, GSHCLIPINMGAPSC (SEQ ID NO: 172); CISPRGCGGSSASQSGQGSHCLIPINMGAPSC (SEQ ID NO: 173);
- CPHFTTTSCGCISPRGCPG (SEQ ID NO: 177); CNHHYHYYCGCISPRGCPG (SEQ ID NO: 178); CPHVSFGSCGCISPRGCPG (SEQ ID NO: 179); CPYYTLSYCGCISPRGCPG (SEQ ID NO: 180); CNHVYFGTCGCISPRGCPG (SEQ ID NO: 181);
- CNHFTLTTCGCISPRGCPG (SEQ ID NO: 182); CHHFTLTTCGCISPRGCPG (SEQ ID NO: 183); YNPCATPMCCISPRGCPG (SEQ ID NO: 184); CNHHYFYTCGCISPRGCG (SEQ ID NO: 185); CNHHYHYYCGCISPRGCG (SEQ ID NO: 186);
- CNHVYFGTCGCISPRGCG (SEQ ID NO: 187); CHHVYWGHCGCISPRGCG (SEQ ID NO: 188); CPHFTTTSCGCISPRGCG (SEQ ID NO: 189); CNHFTLTTCGCISPRGCG (SEQ ID NO: 190); CHHFTLTTCGCISPRGCG (SEQ ID NO: 191);
- CPYYTLSYCGCISPRGCG (SEQ ID NO: 192); CPHVSFGSCGCISPRGCG (SEQ ID NO: 193); ADHVFWGSYGCISPRGCG (SEQ ID NO: 194); YNPCATPMCCISPRGCG (SEQ ID NO: 195); CHHVYWGHCGCISPRGCG (SEQ ID NO: 196);
- Suitable masking moieties for use with antibodies that bind a Jagged target include, by way of non-limiting example, masking moieties that include a sequence such as QGQSGQCNIWLVGGDCRGWQG (SEQ ID NO: 496); QGQSGQGQQWCNIWINGGDCRGWNG (SEQ ID NO: 201); PWCMQRQDFLRCPQP (SEQ ID NO: 202); QLGLPAYMCTFECLR (SEQ ID NO: 203); CNLWVSGGDCGGLQG (SEQ ID NO: 204); SCSLWTSGSCLPHSP (SEQ ID NO: 205); YCLQLPHYMQAMCGR (SEQ ID NO: 206); CFLYSCTDVSYWNNT (SEQ ID NO: 207); PWCMQRQDYLRCPQP (SEQ ID NO: 208); CNLWISGGDCRGLAG (SEQ ID NO: 209)
- CNLWVSGGDCRGVQG (SEQ ID NO: 210); CNLWVSGGDCRGLRG (SEQ ID NO: 210).
- CNLWISGGDCRGLPG SEQ ID NO: 212
- CNLWVSGGDCRDAPW SEQ ID NO: 213
- CNLWVSGGDCRDLLG SEQ ID NO: 214
- CNLWVSGGDCRGLQG SEQ ID NO: 215
- CNLWLHGGDCRGWQG SEQ ID NO: 216
- CNIWLVGGDCRGWQG (SEQ ID NO: 217); CTTWFCGGDCGVMRG (SEQ ID NO: 218); CNIWGPSVDCGALLG (SEQ ID NO: 219); CNIWVNGGDCRSFEG (SEQ ID NO: 220); YCLNLPRYMQDMCWA (SEQ ID NO: 221); YCLALPHYMQADCAR (SEQ ID NO: 222); CFLYSCGDVSYWGSA (SEQ ID NO: 223); CYLYSCTDSAFWNNR (SEQ ID NO: 224); CYLYSCNDVSYWSNT (SEQ ID NO: 225); CFLYSCTDVSYW (SEQ ID NO: 226); CFLYSCTDVAYWNSA (SEQ ID NO: 227); CFLYSCTDVSYWGDT (SEQ ID NO: 228); CFLYSCTDVSYWGNS (SEQ ID NO: 229); CFLYS CTD VA Y WNNT (SEQ ID NO:
- GCNIWLNGGDCRGWVDPLQG SEQ ID NO: 238
- GCNIWLVGGDCRGWIGDTNG SEQ ID NO: 239
- GCNIWLVGGDCRGWIEDSNG SEQ ID NO: 240
- GCNIWANGGDCRGWIDNIDG SEQ ID NO: 241
- GCNIWLVGGDCRGWLGEAVG SEQ ID NO: 242
- GCNIWLVGGDCRGWLEEAVG SEQ ID NO: 243
- GGPALCNIWLNGGDCRGWSG SEQ ID NO: 244
- GAPVFCNIWLNGGDCRGWMG SEQ ID NO: 245)
- GQQWCNIWINGGDCRGWNG SEQ ID NO: 246
- GKSEFCNIWLNGGDCRGWIG (SEQ ID NO: 247); GTPGGCNIWANGGDCRGWEG (SEQ ID NO: 248); GASQYCNLWINGGDCRGWRG (SEQ ID NO: 249);
- GCNIWLVGGDCRPWVEGG (SEQ ID NO: 250); GCNIWAVGGDCRPFVDGG (SEQ ID NO: 251); GCNIWLNGGDCRAWVDTG (SEQ ID NO: 252); GCNIWIVGGDCRPFINDG (SEQ ID NO: 253); GCNIWLNGGDCRPVVFGG (SEQ ID NO: 254);
- GCNIWLSGGDCRMFMNEG SEQ ID NO: 255
- GCNIWVNGGDCRSFVYSG SEQ ID NO: 256
- GCNIWLNGGDCRGWEASG SEQ ID NO: 257;
- GCNIWAHGGDCRGFIEPG (SEQ ID NO: 258); GCNIWLNGGDCRTFVASG (SEQ ID NO: 259); GCNIWAHGGDCRGFIEPG (SEQ ID NO: 260); GFLENCNIWLNGGDCRTG (SEQ ID NO: 261); GIYENCNIWLNGGDCRMG (SEQ ID NO: 262); and/or
- GIPDNCNIWINGGDCRYG SEQ ID NO: 263.
- Suitable masking moieties for use with antibodies that bind an interleukin 6 target include, by way of non-limiting example, masking moieties that include a sequence such as QGQSGQYGSCSWNYVHIFMDC (SEQ ID NO: 264); QGQSGQGDFDIPFPAHWVPIT (SEQ ID NO: 265);
- QGQSGQMGVPAGCVWNYAHIFMDC (SEQ ID NO: 266); YRSCNWNYVSIFLDC (SEQ ID NO: 267); PGAFDIPFPAHWVPNT (SEQ ID NO: 268);
- ESSCVWNYVHIYMDC (SEQ ID NO: 269); YPGCKWNYDRIFLDC (SEQ ID NO: 270); YRTCSWNYVGIFLDC (SEQ ID NO: 271); YGSCSWNYVHIFMDC (SEQ ID NO: 161); YGSCSWNYVHIFLDC (SEQ ID NO: 272); YGSCNWNYVHIFLDC (SEQ ID NO: 273); YTSCNWNYVHIFMDC (SEQ ID NO: 274); YPGCKWNYDRIFLDC (SEQ ID NO: 275); WRSCNWNYAHIFLDC (SEQ ID NO: 276); WSNCHWNYVHIFLDC (SEQ ID NO: 276); WSNCHWNYVHIFLDC (SEQ ID NO:
- AGVPAGCTWNYVHIFMEC SEQ ID NO: 294
- VGVPNGCVWNYAHIFMEC SEQ ID NO: 295
- DGGPAGCSWNYVHIFMEC SEQ ID NO: 296
- AVGPAGCWWNYVHIFMEC (SEQ ID NO: 297); CTWNYVHIFMDCGEGEGP (SEQ ID NO: 298); GGVPEGCTWNYAHIFMEC (SEQ ID NO: 299);
- AEVPAGCWWNYVHIFMEC (SEQ ID NO: 300); AGVPAGCTWNYVHIFMEC (SEQ ID NO: 301); SGASGGCKWNYVHIFMDC (SEQ ID NO: 302);
- TPGCRWNYVHIFMECEAL (SEQ ID NO: 303); VGVPNGCVWNYAHIFMEC (SEQ ID NO: 304); PGAFDIPFPAHWVPNT (SEQ ID NO: 305); RGACDIPFPAHWIPNT (SEQ ID NO: 306); QGDFDIPFPAHWVPIT (SEQ ID NO: 162); XGafDIPFPAHWvPnT (SEQ ID NO: 307); RGDGNDSDIPFPAHWVPRT (SEQ ID NO: 308);
- SGVGRDRDIPFPAHWVPRT (SEQ ID NO: 309); WAGGNDCDIPFPAHWIPNT (SEQ ID NO: 310); WGDGMDVDIPFPAHWVPVT (SEQ ID NO: 31 1);
- the K d of the AB modified with a MM towards the target is at least 5, 10, 25, 50, 100, 250, 500, 1,000, 2,500, 5,000, 10,000, 50,000, 100,000, 500,000, 1,000,000, 5,000,000, 10,000,000, 50,000,000 or greater, or between 5-10, 10-100, 10-1,000, 10- 10,000, 10-100,000, 10-1,000,000, 10-10,000,000, 100-1,000, 100-10,000, 100-100,000, 100-1,000,000, 100-10,000,000, 1,000-10,000, 1,000-100,000, 1,000-1,000,000, 1000- 10,000,000, 10,000-100,000, 10,000-1,000,000, 10,000-10,000,000, 100,000-1,000,000, or 100,000-10,000,000 times greater than the K d of the AB not modified with an MM or of the parental AB towards the target.
- the binding affinity of the AB modified with a MM towards the target is at least 2, 3, 4, 5, 10, 20, 25, 40, 50, 100, 250, 500, 1,000, 2,500, 5,000, 10,000, 50,000, 100,000, 500,000, 1,000,000, 5,000,000, 10,000,000, 50,000,000 or greater, or between 5-10, 10-100, 10-1,000, 10-10,000, 10-100,000, 10-1,000,000, 10- 10,000,000, 100-1,000, 100-10,000, 100-100,000, 100-1,000,000, 100-10,000,000, 1,000- 10,000, 1,000-100,000, 1,000-1,000,000, 1000-10,000,000, 10,000-100,000, 10,000- 1,000,000, 10,000-10,000,000, 100,000-1,000,000, or 100,000-10,000,000 times lower than the binding affinity of the AB not modified with an MM or of the parental AB towards the target.
- the dissociation constant (K d ) of the MM towards the AB is generally greater than the K d of the AB towards the target.
- the K d of the MM towards the AB can be at least 5, 10, 25, 50, 100, 250, 500, 1,000, 2,500, 5,000, 10,000, 100,000, 1,000,000 or even 10,000,000 times greater than the K d of the AB towards the target.
- the binding affinity of the MM towards the AB is generally lower than the binding affinity of the AB towards the target.
- the binding affinity of MM towards the AB can be at least 5, 10, 25, 50, 100, 250, 500, 1,000, 2,500, 5,000, 10,000, 100,000, 1,000,000 or even 10,000,000 times lower than the binding affinity of the AB towards the target.
- the AB's ability to bind the target when modified with an MM can be reduced by at least 50%, 60%, 70%, 80%, 90%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% and even 100% for at least 2, 4, 6, 8, 12, 28, 24, 30, 36, 48, 60, 72, 84, or 96 hours, or 5, 10, 15, 30, 45, 60, 90, 120, 150, or 180 days, or 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12 months or more when measured in vivo or in an in vitro assay.
- the MM inhibits the binding of the AB to the target.
- the MM binds the antigen binding domain of the AB and inhibits binding of the AB to the target.
- the MM can sterically inhibit the binding of the AB to the target.
- the MM can allosterically inhibit the binding of the AB to its target.
- the AB when the AB is modified or coupled to a MM and in the presence of target there is no binding or substantially no binding of the AB to the target, or no more than 0.001%, 0.01%, 0.1%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, or 50% binding of the AB to the target, as compared to the binding of the AB not modified with an MM, the parental AB, or the AB not coupled to an MM to the target, for at least 2, 4, 6, 8, 12, 28, 24, 30, 36, 48, 60, 72, 84, or 96 hours, or 5, 10, 15, 30, 45, 60, 90, 120, 150, or 180 days, or 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, or 12 months or longer when measured in vivo or in an in vitro assay.
- the MM When an AB is coupled to or modified by a MM, the MM 'masks' or reduces or otherwise inhibits the specific binding of the AB to the target.
- such coupling or modification can effect a structural change that reduces or inhibits the ability of the AB to specifically bind its target.
- An AB coupled to or modified with an MM can be represented by the following formulae (in order from an amino (N) terminal region to carboxyl (C) terminal region:
- MM is a masking moiety
- the AB is an antibody or antibody fragment thereof
- the L is a linker.
- linkers e.g., flexible linkers
- the MM is not a natural binding partner of the AB. In some embodiments, the MM contains no or substantially no homology to any natural binding partner of the AB. In some embodiments, the MM is no more than 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, or 80% similar to any natural binding partner of the AB. In some embodiments, the MM is no more than 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, or 80% identical to any natural binding partner of the AB.
- the MM is no more than 25% identical to any natural binding partner of the AB. In some embodiments, the MM is no more than 50% identical to any natural binding partner of the AB. In some embodiments, the MM is no more than 20% identical to any natural binding partner of the AB. In some embodiments, the MM is no more than 10% identical to any natural binding partner of the AB.
- the activatable antibodies include an AB that is modified by an MM and also includes one or more cleavable moieties (CM). Such activatable antibodies exhibit activatable/switchable binding, to the AB's target.
- Activatable antibodies generally include an antibody or antibody fragment (AB), modified by or coupled to a masking moiety (MM) and a modifiable or cleavable moiety (CM).
- CM modifiable or cleavable moiety
- the CM contains an amino acid sequence that serves as a substrate for at least one matrix metalloprotease of interest.
- the elements of the activatable antibodies are arranged so that the MM and CM are positioned such that in a cleaved (or relatively active) state and in the presence of a target, the AB binds a target while in an uncleaved (or relatively inactive) state in the presence of the target, specific binding of the AB to its target is reduced or inhibited.
- the specific binding of the AB to its target can be reduced due to the inhibition or masking of the AB's ability to specifically bind its target by the MM.
- the K d of the AB modified with a MM and a CM towards the target is at least 5, 10, 20, 25, 40, 50, 100, 250, 500, 1,000, 2,500, 5,000, 10,000, 50,000, 100,000, 500,000, 1,000,000, 5,000,000, 10,000,000, 50,000,000 or greater, or between 5-10, 10-100, 10-1,000, 10-10,000, 10-100,000, 10-1,000,000, 10-10,000,000, 100-1,000, 100-10,000, 100-100,000, 100-1,000,000, 100-10,000,000, 1,000-10,000, 1,000-100,000, 1,000- 1,000,000, 1000-10,000,000, 10,000-100,000, 10,000-1,000,000, 10,000-10,000,000, 100,000-1,000,000, or 100,000-10,000,000 times greater than the K d of the AB not modified with an MM and a CM or of the parental AB towards the target.
- the binding affinity of the AB modified with a MM and a CM towards the target is at least 2, 3, 4, 5, 10, 20, 25, 40, 50, 100, 250, 500, 1,000, 2,500, 5,000, 10,000, 50,000, 100,000, 500,000, 1,000,000, 5,000,000, 10,000,000, 50,000,000 or greater, or between 5-10, 10-100, 10-1,000, 10-10,000, 10-100,000, 10-1,000,000, 10-10,000,000, 100-1,000, 100-10,000, 100-100,000, 100-1,000,000, 100-10,000,000, 1,000-10,000, 1,000-100,000, 1,000- 1,000,000, 1000-10,000,000, 10,000-100,000, 10,000-1,000,000, 10,000-10,000,000, 100,000-1,000,000, or 100,000-10,000,000 times lower than the binding affinity of the AB not modified with an MM and a CM or of the parental AB towards the target.
- the AB's ability to bind the target when modified with an MM and a CM can be reduced by at least 50%, 60%, 70%, 80%, 90%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% and even 100% for at least 2, 4, 6, 8, 12, 28, 24, 30, 36, 48, 60, 72, 84, or 96 hours or 5, 10, 15, 30, 45, 60, 90, 120, 150, or 180 days, or 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12 months or longer when measured in vivo or in an in vitro assay.
- cleaved state refers to the condition of the activatable antibodies following modification of the CM by at least one matrix
- uncleaved state refers to the condition of the activatable antibodies in the absence of cleavage of the CM by a MMP.
- activatable antibodies is used herein to refer to an activatable antibody in both its uncleaved (native) state, as well as in its cleaved state.
- a cleaved activatable antibody may lack an MM due to cleavage of the CM by protease, resulting in release of at least the MM (e.g., where the MM is not joined to the activatable antibodies by a covalent bond (e.g., a disulfide bond between cysteine residues).
- activatable or switchable By activatable or switchable is meant that the activatable antibody exhibits a first level of binding to a target when in a inhibited, masked or uncleaved state (i.e., a first conformation), and a second level of binding to the target in the uninhibited, unmasked and/or cleaved state (i.e., a second conformation), where the second level of target binding is greater than the first level of binding.
- the access of target to the AB of the activatable antibody is greater in the presence of a cleaving agent capable of cleaving the CM than in the absence of such a cleaving agent.
- the AB when the activatable antibody is in the uncleaved state, the AB is inhibited from target binding and can be masked from target binding (i.e., the first conformation is such the AB cannot bind the target), and in the cleaved state the AB is not inhibited or is unmasked to target binding.
- the CM and AB of the activatable antibodies are selected so that the AB represents a binding moiety for a given target, and the CM represents a substrate for a MMP that is co-localized with the target at a treatment site or diagnostic site in a subject.
- the activatable antibodies disclosed herein find particular use where, for example, a MMP capable of cleaving a site in the CM is present at relatively higher levels in target-containing tissue of a treatment site or diagnostic site than in tissue of non-treatment sites (for example in healthy tissue).
- activatable antibodies provide for reduced toxicity and/or adverse side effects that could otherwise result from binding of the AB at non- treatment sites if the AB were not masked or otherwise inhibited from binding to the target.
- an activatable antibody can be designed by selecting an AB of interest and constructing the remainder of the activatable antibody so that, when conformationally constrained, the MM provides for masking of the AB or reduction of binding of the AB to its target. Structural design criteria can be to be taken into account to provide for this functional feature.
- Dynamic range generally refers to a ratio of (a) a maximum detected level of a parameter under a first set of conditions to (b) a minimum detected value of that parameter under a second set of conditions.
- the dynamic range refers to the ratio of (a) a maximum detected level of target protein binding to an activatable antibody in the presence of a MMP capable of cleaving the CM of the activatable antibodies to (b) a minimum detected level of target protein binding to an activatable antibody in the absence of the protease.
- the dynamic range of an activatable antibody can be calculated as the ratio of the equilibrium dissociation constant of an activatable antibody cleaving agent (e.g., enzyme) treatment to the equilibrium dissociation constant of the activatable antibodies cleaving agent treatment.
- the greater the dynamic range of an activatable antibody the better the switchable phenotype of the activatable antibody.
- Activatable antibodies having relatively higher dynamic range values exhibit more desirable switching phenotypes such that target protein binding by the activatable antibodies occurs to a greater extent (e.g., predominantly occurs) in the presence of a cleaving agent (e.g., enzyme) capable of cleaving the CM of the activatable antibodies than in the absence of a cleaving agent.
- Activatable antibodies can be provided in a variety of structural
- activatable antibodies can be represented by the following formula (in order from an amino (N) terminal region to carboxyl (C) terminal region:
- MM is a masking moiety
- CM is a cleavable moiety
- AB is an antibody or fragment thereof.
- MM and CM are indicated as distinct components in the formulae above, in all exemplary embodiments (including formulae) disclosed herein it is contemplated that the amino acid sequences of the MM and the CM could overlap, e.g., such that the CM is completely or partially contained within the MM.
- the formulae above provide for additional amino acid sequences that may be positioned N-terminal or C-terminal to the activatable antibodies elements.
- the MM is not a natural binding partner of the AB. In some embodiments, the MM contains no or substantially no homology to any natural binding partner of the AB. In some embodiments, the MM is no more than 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, or 80% similar to any natural binding partner of the AB. In some embodiments, the MM is no more than 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, or 80% identical to any natural binding partner of the AB.
- the MM is no more than 50% identical to any natural binding partner of the AB. In some embodiments, the MM is no more than 25% identical to any natural binding partner of the AB. In some embodiments, the MM is no more than 20% identical to any natural binding partner of the AB. In some embodiments, the MM is no more than 10% identical to any natural binding partner of the AB.
- the activatable antibody construct may be desirable to insert one or more linkers, e.g., flexible linkers, into the activatable antibody construct so as to provide for flexibility at one or more of the MM-CM junction, the CM-AB junction, or both.
- the AB, MM, and/or CM may not contain a sufficient number of residues (e.g., Gly, Ser, Asp, Asn, especially Gly and Ser, particularly Gly) to provide the desired flexibility.
- the switchable phenotype of such activatable antibody constructs may benefit from introduction of one or more amino acids to provide for a flexible linker.
- an activatable antibody comprises one of the following formulae (where the formula below represent an amino acid sequence in either N- to C-terminal direction or C- to N-terminal direction):
- MM, CM, and AB are as defined above; wherein L 1 and L2 are each independently and optionally present or absent, are the same or different flexible linkers that include at least 1 flexible amino acid (e.g., Gly).
- the formulae above provide for additional amino acid sequences that may be positioned N-terminal or C-terminal to the activatable antibodies elements.
- targeting moieties e.g., a ligand for a receptor of a cell present in a target tissue
- serum half-life extending moieties e.g., polypeptides that bind serum proteins, such as immunoglobulin (e.g., IgG) or serum albumin (e.g., human serum albumin (HAS)).
- immunoglobulin e.g., IgG
- serum albumin e.g., human serum albumin (HAS)
- the CM is specifically cleaved by at least one MMP at a rate of about 0.001- 1500 x 10 4 M ' V or at least 0.001, 0.005, 0.01, 0.05, 0.1, 0.5, 1, 2.5, 5, 7.5, 10, 15, 20, 25, 50, 75, 100, 125, 150, 200, 250, 500, 750, 1000, 1250, or 1500 x 10 4 M ⁇ S "1 .
- CM For specific cleavage by an enzyme, contact between the enzyme and CM is made.
- the activatable antibody comprising an AB coupled to a MM and a CM
- the CM can be cleaved.
- Sufficient enzyme activity can refer to the ability of the enzyme to make contact with the CM and effect cleavage. It can readily be envisioned that an enzyme may be in the vicinity of the CM but unable to cleave because of other cellular factors or protein modification of the enzyme.
- Linkers suitable for use in compositions described herein are generally ones that provide flexibility of the modified AB or the activatable antibodies to facilitate the inhibition of the binding of the AB to the target. Such linkers are generally referred to as flexible linkers.
- Suitable linkers can be readily selected and can be of any of a suitable of different lengths, such as from 1 amino acid (e.g., Gly) to 20 amino acids, from 2 amino acids to 15 amino acids, from 3 amino acids to 12 amino acids, including 4 amino acids to 10 amino acids, 5 amino acids to 9 amino acids, 6 amino acids to 8 amino acids, or 7 amino acids to 8 amino acids, and may be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12, 13, 14, 15, 16, 17, 18, 19, or 20 amino acids in length.
- Exemplary flexible linkers include glycine polymers (G)n, glycine-serine polymers (including, for example, (GS)n, (GSGGS)n (SEQ ID NO: 1) and (GGGS)n (SEQ ID NO: 2), where n is an integer of at least one), glycine-alanine polymers, alanine-serine polymers, and other flexible linkers known in the art.
- Glycine and glycine-serine polymers are relatively unstructured, and therefore may be able to serve as a neutral tether between components. Glycine accesses significantly more phi-psi space than even alanine, and is much less restricted than residues with longer side chains (see Scheraga, Rev.
- Exemplary flexible linkers include, but are not limited to Gly-Gly-Ser-Gly (SEQ ID NO: 3), Gly-Gly-Ser-Gly-Gly (SEQ ID NO: 4), Gly- Ser-Gly-Ser-Gly (SEQ ID NO: 5), Gly-Ser-Gly-Gly-Gly (SEQ ID NO: 6), Gly-Gly-Gly- Ser-Gly (SEQ ID NO: 7), Gly-Ser-Ser-Ser-Gly (SEQ ID NO: 8), and the like.
- an activatable antibodies can include linkers that are all or partially flexible, such that the linker can include a flexible linker as well as one or more portions that confer less flexible structure to provide for a desired activatable antibodies structure.
- the activatable antibodies described herein also include an agent conjugated to the activatable antibody.
- the conjugated agent is a therapeutic agent, such as an anti-inflammatory and/or an
- the agent is conjugated to a carbohydrate moiety of the activatable antibody, for example, in some embodiments, where the carbohydrate moiety is located outside the antigen-binding region of the antibody or antigen-binding fragment in the activatable antibody. In some embodiments, the agent is conjugated to a sulfhydryl group of the antibody or antigen-binding fragment in the activatable antibody.
- the agent is a cytotoxic agent such as a toxin (e.g., an enzymatically active toxin of bacterial, fungal, plant, or animal origin, or fragments thereof), or a radioactive isotope (i.e., a radioconjugate).
- a cytotoxic agent such as a toxin (e.g., an enzymatically active toxin of bacterial, fungal, plant, or animal origin, or fragments thereof), or a radioactive isotope (i.e., a radioconjugate).
- the agent is a detectable moiety such as, for example, a label or other marker.
- the agent is or includes a radiolabeled amino acid, one or more biotinyl moieties that can be detected by marked avidin (e.g., streptavidin containing a fluorescent marker or enzymatic activity that can be detected by optical or calorimetric methods), one or more radioisotopes or radionuclides, one or more fluorescent labels, one or more enzymatic labels, and/or one or more chemiluminescent agents.
- detectable moieties are attached by spacer molecules.
- the disclosure also pertains to immunoconjugates comprising an antibody conjugated to a cytotoxic agent such as a toxin (e.g., an enzymatically active toxin of bacterial, fungal, plant, or animal origin, or fragments thereof), or a radioactive isotope (i.e., a radioconjugate).
- a cytotoxic agent such as a toxin (e.g., an enzymatically active toxin of bacterial, fungal, plant, or animal origin, or fragments thereof), or a radioactive isotope (i.e., a radioconjugate).
- cytotoxic agents include, for example, dolastatins and derivatives thereof (e.g. auristatin E, AFP, MMAF, MMAE, MMAD, DMAF, DMAE).
- the agent is monomethyl auristatin E (MMAE) or monomethyl auristatin D (MMAD).
- the agent is an agent selected from the group listed in Table 3. In some embodiments, the agent is a dolastatin. In some embodiments, the agent is an auristatin or derivative thereof. In some embodiments, the agent is auristatin E or a derivative thereof. In some embodiments, the agent is monomethyl auristatin E (MMAE). In some embodiments, the agent is monomethyl auristatin D (MMAD). In some embodiments, the agent is a maytansinoid or maytansinoid derivative. In some embodiments, the agent is DM1 or DM4. In some embodiments, the agent is a duocarmycin or derivative thereof. In some embodiments, the agent is a calicheamicin or derivative thereof. In some embodiments, the agent is a dolastatin. In some embodiments, the agent is an auristatin or derivative thereof. In some embodiments, the agent is auristatin E or a derivative thereof. In some embodiments, the agent is monomethyl auristatin E (MMA
- the agent is a pyrrolobenzodiazepine.
- the agent is linked to the AB using a maleimide caproyl-valine-citrulline linker or a maleimide PEG-valine-citrulline linker. In some embodiments, the agent is linked to the AB using a maleimide caproyl-valine-citrulline linker.
- the agent is linked to the AB using a maleimide PEG-valine- citrulline linker
- the agent is monomethyl auristatin D (MMAD) linked to the AB using a maleimide PEG-valine-citrulline-para-aminobenzyloxycarbonyl linker, and this linker payload construct is referred to herein as "vc-MMAD.”
- the agent is monomethyl auristatin E (MMAE) linked to the AB using a maleimide PEG-valine-citrulline-para-aminobenzyloxycarbonyl linker, and this linker payload construct is referred to herein as "vc-MMAE.”
- vc-MMAD The structures of vc-MMAD and vc-MMAE are shown below: vc-MMAD:
- Enzymatically active toxins and fragments thereof that can be used include diphtheria A chain, nonbinding active fragments of diphtheria toxin, exotoxin A chain (from Pseudomonas aeruginosa), ricin A chain, abrin A chain, modeccin A chain, alpha-sarcin, Aleurites fordii proteins, dianthin proteins, Phytolaca americana proteins (PAPI, PAPII, and PAP-S), momordica charantia inhibitor, curcin, crotin, sapaonaria officinalis inhibitor, gelonin, mitogellin, restrictocin, phenomycin, enomycin, and the tricothecenes.
- a variety of radionuclides are available for the production of radioconjugated antibodies. Examples include 212 Bi, 131 I, 131 In, 90 Y, and 186 Re.
- Conjugates of the antibody and cytotoxic agent are made using a variety of bifunctional protein-coupling agents such as N-succinimidyl-3-(2-pyridyldithiol) propionate (SPDP), iminothiolane (IT), bifunctional derivatives of imidoesters (such as dimethyl adipimidate HCL), active esters (such as disuccinimidyl suberate), aldehydes (such as glutareldehyde), bis-azido compounds (such as bis (p-azidobenzoyl) hexanediamine), bis- diazonium derivatives (such as bis-(p-diazoniumbenzoyl)-ethylenediamine), diisocyanates (such as tolyene 2,6-diisocyanate), and bis-active fluorine compounds (such as 1,5-difluoro- 2,4-dinitrobenzene).
- SPDP N-succinimidyl-3-(2-
- a ricin immunotoxin can be prepared as described in Vitetta et al, Science 238: 1098 (1987).
- Carbon- 14-labeled l-isothiocyanatobenzyl-3- methyldiethylene triaminepentaacetic acid (MX-DTPA) is an exemplary chelating agent for conjugation of radionucleotide to the antibody. (See W094/1 1026).
- Table 3 lists some of the exemplary pharmaceutical agents that may be employed in the herein described disclosure but in no way is meant to be an exhaustive list.
- MMAD Monomethyl auristatin D
- MMAE Hydroxyphenstatin
- MMAF Monomethyl auristatin F
- Auristatin derivatives e.g., amides thereof Modified Bryostatins
- Maytansinoids e.g. DM-1; DM-4
- Coupling may be accomplished by any chemical reaction that will bind the two molecules so long as the antibody and the other moiety retain their respective activities.
- This linkage can include many chemical mechanisms, for instance covalent binding, affinity binding, intercalation, coordinate binding and complexation.
- the binding is, however, covalent binding.
- Covalent binding can be achieved either by direct condensation of existing side chains or by the incorporation of external bridging molecules.
- Many bivalent or polyvalent linking agents are useful in coupling protein molecules, such as the antibodies of the present disclosure, to other molecules.
- representative coupling agents can include organic compounds such as thioesters, carbodiimides, succinimide esters, diisocyanates, glutaraldehyde, diazobenzenes and hexamethylene diamines.
- organic compounds such as thioesters, carbodiimides, succinimide esters, diisocyanates, glutaraldehyde, diazobenzenes and hexamethylene diamines.
- the conjugated activatable antibody can also be modified for site-specific conjugation through modified amino acid sequences inserted or otherwise included in the activatable antibody sequence. These modified amino acid sequences are designed to allow for controlled placement and/or dosage of the conjugated agent within a conjugated activatable antibody.
- the activatable antibody can be engineered to include cysteine substitutions at positions on light and heavy chains that provide reactive thiol groups and do not negatively impact protein folding and assembly, nor alter antigen binding.
- the activatable antibody can be engineered to include or otherwise introduce one or more non-natural amino acid residues within the activatable antibody to provide suitable sites for conjugation.
- the activatable antibody can be engineered to include or otherwise introduce enzymatically activatable peptide sequences within the activatable antibody sequence.
- suitable linkers include: (i) EDC (l-ethyl-3- (3-dimethylamino-propyl) carbodiimide hydrochloride; (ii) SMPT (4- succinimidyloxycarbonyl-alpha-methyl-alpha-(2-pridyl-dithio)-toluene (Pierce Chem. Co., Cat. (21558G); (iii) SPDP (succinimidyl-6 [3-(2-pyridyldithio) propionamido]hexanoate (Pierce Chem.
- Sulfo-LC-SPDP sulfosuccinimidyl 6 [3-(2- pyridyldithio)-propianamide] hexanoate
- sulfo- NHS N-hydroxysulfo-succinimide: Pierce Chem. Co., Cat. #24510 conjugated to EDC.
- Additional linkers include, but are not limited to, SMCC, sulfo-SMCC, SPDB, or sulfo- SPDB.
- linkers described above contain components that have different attributes, thus leading to conjugates with differing physio-chemical properties.
- sulfo-NHS esters of alkyl carboxylates are more stable than sulfo-NHS esters of aromatic carboxylates.
- NHS-ester containing linkers are less soluble than sulfo-NHS esters.
- the linker SMPT contains a sterically hindered disulfide bond, and can form conjugates with increased stability.
- Disulfide linkages are in general, less stable than other linkages because the disulfide linkage is cleaved in vitro, resulting in less conjugate available.
- Sulfo-NHS in particular, can enhance the stability of carbodimide couplings.
- Carbodimide couplings (such as EDC) when used in conjunction with sulfo-NHS, forms esters that are more resistant to hydrolysis than the carbodimide coupling reaction alone.
- the linkers are cleavable. In some embodiments, the linkers are non-cleavable. In some embodiments, two or more linkers are present. The two or more linkers are all the same, i.e., cleavable or non-cleavable, or the two or more linkers are different, i.e., at least one cleavable and at least one non-cleavable.
- ABs may be covalently attached to an agent through an intermediate linker having at least two reactive groups, one to react with AB and one to react with the agent.
- the linker which may include any compatible organic compound, can be chosen such that the reaction with AB (or agent) does not adversely affect AB reactivity and selectivity. Furthermore, the attachment of linker to agent might not destroy the activity of the agent.
- Suitable linkers for reaction with oxidized antibodies or oxidized antibody fragments include those containing an amine selected from the group consisting of primary amine, secondary amine, hydrazine, hydrazide, hydroxylamine, phenylhydrazine, semicarbazide and thiosemicarbazide groups.
- Such reactive functional groups may exist as part of the structure of the linker, or may be introduced by suitable chemical modification of linkers not containing such groups.
- suitable linkers for attachment to reduced ABs include those having certain reactive groups capable of reaction with a sulfhydryl group of a reduced antibody or fragment.
- reactive groups include, but are not limited to: reactive haloalkyl groups (including, for example, haloacetyl groups), p- mercuribenzoate groups and groups capable of Michael-type addition reactions (including, for example, maleimides and groups of the type described by Mitra and Lawton, 1979, J. Amer. Chem. Soc. 101 : 3097-3110).
- suitable linkers for attachment to neither oxidized nor reduced Abs include those having certain functional groups capable of reaction with the primary amino groups present in unmodified lysine residues in the Ab.
- Such reactive groups include, but are not limited to, NHS carboxylic or carbonic esters, sulfo- NHS carboxylic or carbonic esters, 4-nitrophenyl carboxylic or carbonic esters, pentafluorophenyl carboxylic or carbonic esters, acyl imidazoles, isocyanates, and isothiocyanates.
- suitable linkers for attachment to neither oxidized nor reduced Abs include those having certain functional groups capable of reaction with the carboxylic acid groups present in aspartate or glutamate residues in the Ab, which have been activated with suitable reagents.
- suitable activating reagents include EDC, with or without added NHS or sulfo-NHS, and other dehydrating agents utilized for carboxamide formation.
- the functional groups present in the suitable linkers would include primary and secondary amines, hydrazines, hydroxylamines, and hydrazides.
- the agent may be attached to the linker before or after the linker is attached to the AB. In certain applications it may be desirable to first produce an AB-linker intermediate in which the linker is free of an associated agent. Depending upon the particular application, a specific agent may then be covalently attached to the linker. In some embodiments, the AB is first attached to the MM, CM and associated linkers and then attached to the linker for conjugation purposes.
- Branched Linkers In specific embodiments, branched linkers that have multiple sites for attachment of agents are utilized. For multiple site linkers, a single covalent attachment to an AB would result in an AB-linker intermediate capable of binding an agent at a number of sites.
- the sites may be aldehyde or sulfhydryl groups or any chemical site to which agents can be attached.
- higher specific activity can be achieved by attachment of a single site linker at a plurality of sites on the AB.
- This plurality of sites may be introduced into the AB by either of two methods. First, one may generate multiple aldehyde groups and/or sulfhydryl groups in the same AB. Second, one may attach to an aldehyde or sulfhydryl of the AB a "branched linker" having multiple functional sites for subsequent attachment to linkers.
- the functional sites of the branched linker or multiple site linker may be aldehyde or sulfhydryl groups, or may be any chemical site to which linkers may be attached.
- Cleavable Linkers Peptide linkers that are susceptible to cleavage by enzymes of the complement system, such as but not limited to urokinase, tissue plasminogen activator, trypsin, plasmin, or another enzyme having proteolytic activity may be used in one embodiment of the present disclosure.
- an agent is attached via a linker susceptible to cleavage by complement.
- the antibody is selected from a class that can activate complement. The antibody-agent conjugate, thus, activates the complement cascade and releases the agent at the target site.
- an agent is attached via a linker susceptible to cleavage by enzymes having a proteolytic activity such as a urokinase, a tissue plasminogen activator, plasmin, or trypsin.
- cleavable linkers are useful in conjugated activatable antibodies that include an extracellular toxin, e.g., by way of non- limiting example, any of the extracellular toxins shown in Table 3.
- Non-limiting examples of cleavable linker sequences are provided in Table 4.
- TGF SSRHRRALD (SEQ ID NO: 129)
- GGSIDGR SEQ ID NO: 1357
- Calf skin collagen (a2(I) chain) GPQGLLGA (SEQ ID NO: 138)
- Bovine cartilage collagen (al(II) chain) GIAGQ (SEQ ID NO: 139)
- AGLGVVER (SEQ ID NO: 143)
- Rat aiI 3 (2J) ESLPVVAV (SEQ ID NO: 149)
- Human fibroblast collagenase DVAQFVLT (SEQ ID NO : 151 )
- VAQFVLTE (SEQ ID NO: 152)
- agents may be attached via disulfide bonds (for example, the disulfide bonds on a cysteine molecule) to the AB. Since many tumors naturally release high levels of glutathione (a reducing agent) this can reduce the disulfide bonds with subsequent release of the agent at the site of delivery.
- glutathione a reducing agent
- the reducing agent that would modify a CM would also modify the linker of the conjugated activatable antibody.
- linker in such a way as to optimize the spacing between the agent and the AB of the activatable antibody. This may be accomplished by use of a linker of the general structure:
- W is either -NH-CH 2 - or -CH 2 -;
- Q is an amino acid, peptide
- n is an integer from 0 to 20.
- the linker may comprise a spacer element and a cleavable element.
- the spacer element serves to position the cleavable element away from the core of the AB such that the cleavable element is more accessible to the enzyme responsible for cleavage.
- Certain of the branched linkers described above may serve as spacer elements.
- linker to agent or of spacer element to cleavable element, or cleavable element to agent
- Any reaction providing a product of suitable stability and biological compatibility is acceptable.
- Serum Complement and Selection of Linkers according to one method of the present disclosure, when release of an agent is desired, an AB that is an antibody of a class that can activate complement is used. The resulting conjugate retains both the ability to bind antigen and activate the complement cascade.
- an agent is joined to one end of the cleavable linker or cleavable element and the other end of the linker group is attached to a specific site on the AB.
- the agent may be attached to the carboxy terminus of a peptide, amino acid or other suitably chosen linker via an ester or amide bond, respectively.
- such agents may be attached to the linker peptide via a carbodimide reaction. If the agent contains functional groups that would interfere with attachment to the linker, these interfering functional groups can be blocked before attachment and deblocked once the product conjugate or intermediate is made. The opposite or amino terminus of the linker is then used either directly or after further modification for binding to an AB that is capable of activating complement.
- Linkers may be of any desired length, one end of which can be covalently attached to specific sites on the AB of the activatable antibody.
- the other end of the linker or spacer element may be attached to an amino acid or peptide linker.
- conjugates when administered to a subject, will accomplish delivery and release of the agent at the target site, and are particularly effective for the in vivo delivery of pharmaceutical agents, antibiotics, antimetabolites, antiproliferative agents and the like as presented in but not limited to those in Table 3.
- conjugates may be prepared by attaching the agent to an AB that is not capable of activating complement via a linker that is mildly susceptible to cleavage by serum proteases. When this conjugate is administered to an individual, antigen
- ic antibody complexes will form quickly whereas cleavage of the agent will occur slowly, thus resulting in release of the compound at the target site.
- the activatable antibody may be conjugated to one or more therapeutic agents using certain biochemical cross- linkers.
- Cross-linking reagents form molecular bridges that tie together functional groups of two different molecules.
- hetero- bifunctional cross-linkers can be used that eliminate unwanted homopolymer formation.
- Peptidyl linkers cleavable by lysosomal proteases are also useful, for example, Val-Cit, Val-Ala or other dipeptides.
- acid-labile linkers cleavable in the low-pH environment of the lysosome may be used, for example: bis-sialyl ether.
- Other suitable linkers include cathepsin-labile substrates, particularly those that show optimal function at an acidic pH.
- Non-Cleavable Linkers or Direct Attachment In some embodiments of the disclosure, the conjugate may be designed so that the agent is delivered to the target but not released. This may be accomplished by attaching an agent to an AB either directly or via a non-cleavable linker.
- non-cleavable linkers may include amino acids, peptides, D-amino acids or other organic compounds that may be modified to include functional groups that can subsequently be utilized in attachment to ABs by the methods described herein.
- A- general formula for such an organic linker could be
- W is either -NH-CH 2 - or -CH 2 -;
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Abstract
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CA2925106A CA2925106C (en) | 2013-09-25 | 2014-09-25 | Matrix metalloproteinase substrates and other cleavable moieties and methods of use thereof |
CN202410265536.XA CN118146306A (en) | 2013-09-25 | 2014-09-25 | Matrix metalloproteinase substrates and other cleavable moieties and methods of use thereof |
NZ718283A NZ718283A (en) | 2013-09-25 | 2014-09-25 | Matrix metalloproteinase substrates and other cleavable moieties and methods of use thereof |
KR1020237000930A KR20230011497A (en) | 2013-09-25 | 2014-09-25 | Matrix metalloproteinase substrates and other cleavable moieties and methods of use thereof |
KR1020167010749A KR102488220B1 (en) | 2013-09-25 | 2014-09-25 | Matrix metalloproteinase substrates and other cleavable moieties and methods of use thereof |
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JP2016516911A JP6915987B2 (en) | 2013-09-25 | 2014-09-25 | Matrix metalloproteinase substrates and other cleavable moieties and how to use them |
MX2016003957A MX2016003957A (en) | 2013-09-25 | 2014-09-25 | Matrix metalloproteinase substrates and other cleavable moieties and methods of use thereof. |
EP14783968.2A EP3049111A2 (en) | 2013-09-25 | 2014-09-25 | Matrix metalloproteinase substrates and other cleavable moieties and methods of use thereof |
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RU2016115542A RU2715232C2 (en) | 2013-09-25 | 2014-09-25 | Substrates of matrix metalloproteinase and other cleavable moieties and methods for use thereof |
CN202410265535.5A CN118165076A (en) | 2013-09-25 | 2014-09-25 | Matrix metalloproteinase substrates and other cleavable moieties and methods of use thereof |
BR112016006665-0A BR112016006665B1 (en) | 2013-09-25 | 2014-09-25 | ISOLATED POLYPEPTIDE COMPRISING A CLEAVABLE REGION (CM) WHICH IS A MATRIX METALLOPROTEINASE SUBSTRATE, THERAPEUTIC USE THEREOF AND METHOD FOR DETECTING THE PRESENCE OR ABSENCE OF A CLEAVAGE AGENT AND A TARGET OF INTEREST IN A SAMPLE |
IL244744A IL244744B (en) | 2013-09-25 | 2016-03-24 | Matrix metalloproteinase cleavable polypeptides and uses thereof |
AU2020203910A AU2020203910B2 (en) | 2013-09-25 | 2020-06-12 | Matrix Metalloproteinase Substrates And Other Cleavable Moieties And Methods Of Use Thereof |
IL291329A IL291329A (en) | 2013-09-25 | 2022-03-13 | Matrix metalloproteinase cleavable polypeptides and uses thereof |
AU2023254931A AU2023254931A1 (en) | 2013-09-25 | 2023-10-25 | Matrix metalloproteinase substrates and other cleavable moieties and methods of use thereof |
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