Multispecific antigen-binding molecules having blood coagulation factor VIII (FVIII) cofactor function-substituting activity and pharmaceutical formulations containing such a molecule as an active ingredient

Patent metadata

Field	Value
Publication number	US-12522668-B2
Application number	US-202016936575-A
Country	US
Kind code	B2
Filing date	Jul 23, 2020
Priority date	Sep 29, 2017
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

Bispecific antibodies whose FIX activation-inhibiting activity is not elevated and whose FVIII cofactor function-substituting activity is elevated have been successfully discovered.

First claim

The invention claimed is:

1 . A humanized or human bispecific antibody comprising:
a first IgG heavy chain comprising:
(i) a first heavy chain constant region comprising a first heavy chain constant 1 (CH1) domain, a first heavy chain constant 2 (CH2) domain, and a first heavy chain constant 3 (CH3) domain, and
(ii) a first heavy chain variable region,
a second IgG heavy chain comprising:
(i) a second heavy chain constant region that is different from the first heavy chain constant region and comprises a second CH1 domain, a second CH2 domain, and a second CH3 domain, and
(ii) a second heavy chain variable region,
a first light chain that is a lambda light chain and comprises a first light chain constant region (CL) and a first light chain variable region, and a second light chain that is a kappa light chain, is different from the first light chain, and comprises a second CL and a second light chain variable region, wherein the first heavy chain and the first light chain associate to bind to a first epitope; wherein the second heavy chain and second light chain associate to bind to a second epitope; wherein Kabat numbering positions 131 and 180 in the first CL are occupied by amino acid residues that have a charge opposite to that of the amino acid residues at EU numbering positions 147 and 175 in the first CH1 domain; and wherein either (i) all four of the positions listed below, but not Kabat numbering position 160 of the second CL, are occupied by negatively charged amino acid residues, or (ii) all four of the positions listed below, but not Kabat numbering position 160 of the second CL, are occupied by positively charged amino acid residues:
in the first CH1 domain, EU numbering positions 147 and 175, and
in the second CL, Kabat numbering positions 131 and 180.

2 . The bispecific antibody of claim 1 , wherein:
EU numbering positions 147 and 175 of the first CH1 domain and Kabat numbering positions 131 and 180 of the second CL are all occupied by negatively charged amino acids; and EU numbering positions 147 and 175 of the second CH1 domain and Kabat numbering positions 131 and 180 of the first CL are all occupied by positively charged amino acids.

3 . The bispecific antibody of claim 1 , wherein:
EU numbering positions 147 and 175 of the first CH1 domain and Kabat numbering positions 131 and 180 of the second CL are all occupied by positively charged amino acid residues; and EU numbering positions 147 and 175 of the second CH1 domain and Kabat numbering positions 131 and 180 of the first CL are all occupied by negatively charged amino acid residues.

4 . The bispecific antibody of claim 1 , wherein
(a) at least one amino acid residue of the first heavy chain variable region and at least one amino acid residue of the second light chain variable region that together form an interface between the first heavy chain variable region and the second light chain variable region are charged amino acids that electrostatically repel each other; or (b) at least one amino acid residue of the second heavy chain variable region and at least one amino acid residue of the first light chain variable region that together form an interface between the second heavy chain variable region and the first light chain variable region are charged amino acids that electrostatically repel each other; or (c) both (a) and (b).

5 . The bispecific antibody of claim 4 , wherein the amino acid residues of (a) or (b) that electrostatically repel each other are:
(1) at Kabat numbering position 39 of the first heavy chain variable region and at Kabat numbering position 38 of the second light chain variable region; or (2) at Kabat numbering position 39 of the second heavy chain variable region and at Kabat numbering position 38 of the first light chain variable region; or (3) at Kabat numbering position 45 of the first heavy chain variable region and at Kabat numbering position 44 of the second light chain variable region; or (4) at Kabat numbering position 45 of the second heavy chain variable region and at Kabat numbering position 44 of the first light chain variable region; or (5) any combination of two or more of (1)-(4).

6 . The bispecific antibody of claim 1 , wherein EU numbering positions 147 and 175 in the first CH1 domain and Kabat numbering positions 131 and 180 in the second CL are occupied by negatively charged amino acid residues independently selected from glutamic acid and aspartic acid residues.

7 . The bispecific antibody of claim 1 , wherein EU numbering positions 147 and 175 in the first CH1 domain and Kabat numbering positions 131 and 180 in the second CL are occupied by positively charged amino acid residues independently selected from lysine, arginine, and histidine residues.

8 . The bispecific antibody of claim 4 , wherein the charged amino acids that electrostatically repel each other are selected from either set (X) or set (Y) below:
(X) glutamic acid, aspartic acid; (Y) lysine, arginine, histidine.

9 . The bispecific antibody of claim 5 , wherein the charged amino acids that electrostatically repel each other are selected from either set (X) or set (Y) below:
(X) glutamic acid, aspartic acid; (Y) lysine, arginine, histidine.

10 . A pharmaceutical composition comprising the bispecific antibody of any of claims 1-3 and 4-9 and a pharmaceutically acceptable carrier.

11 . A humanized or human bispecific antibody comprising:
a first IgG heavy chain comprising a first CH1 domain and a first heavy chain variable region, a second IgG heavy chain that is different from the first heavy chain and that comprises a second CH1 domain and a second heavy chain variable region, a first light chain that is a lambda light chain and comprises a first CL and a first light chain variable region, and a second light chain that is a kappa light chain, is different from the first light chain, and comprises a second CL and a second light chain variable region, wherein the first heavy chain and the first light chain associate to bind to a first epitope; wherein the second heavy chain and second light chain associate to bind to a second epitope; wherein (i) EU numbering positions 147 and 175 of the first CH1 domain and Kabat numbering positions 131 and 180 of the second CL are all occupied by negatively charged amino acids, and (ii) EU numbering positions 147 and 175 of the second CH1 domain and Kabat numbering positions 131 and 180 of the first CL are all occupied by positively charged amino acids; and wherein Kabat numbering position 160 of the second CL is occupied by a glutamine residue.

12 . A humanized or human bispecific antibody comprising:
a first IgG heavy chain comprising a first CH1 domain and a first heavy chain variable region, a second IgG heavy chain that is different from the first heavy chain and that comprises a second CH1 domain and a second heavy chain variable region, a first light chain that is a lambda light chain and comprises a first CL and a first light chain variable region, and a second light chain that is a kappa light chain, is different from the first light chain, and comprises a second CL and a second light chain variable region, wherein the first heavy chain and the first light chain associate to bind to a first epitope; wherein the second heavy chain and second light chain associate to bind to a second epitope; wherein (i) EU numbering positions 147 and 175 of the first CH1 domain and Kabat numbering positions 131 and 180 of the second CL are all occupied by positively charged amino acid residues, and (ii) EU numbering positions 147 and 175 of the second CH1 domain and Kabat numbering positio

Assignees

• Chugai Pharmaceutical Co Ltd

Inventors

• Teranishi Yuri
• Kato Kazuki
• Koga Hikaru
• Igawa Tomoyuki
• Yamaguchi Kazuki
• Soeda Tetsuhiro

Classifications

• C07K2317/92

  Affinity (KD), association rate (Ka), dissociation rate (Kd) or EC50 value · CPC title

• C07K2317/31

  multispecific · CPC title

• C07K2317/24

  containing regions, domains or residues from different species, e.g. chimeric, humanized or veneered · CPC title

• C07K2317/56

  variable (Fv) region, i.e. VH and/or VL · CPC title

• A61P7/04 Primary

  Antihaemorrhagics; Procoagulants; Haemostatic agents; Antifibrinolytic agents · CPC title