Anti-STEAP1 antigen-binding protein

Patent metadata

Field	Value
Publication number	US-11530274-B2
Application number	US-201916634571-A
Country	US
Kind code	B2
Filing date	Jul 2, 2019
Priority date	Jul 2, 2018
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

The disclosure provides novel antigen-binding proteins that bind STEAP1 and methods of use.

First claim

What is claimed is:

1. A bispecific antigen binding protein that binds STEAP1 of SEQ ID NO: 2 and comprises:
(a) heavy chain CDRs comprising amino acid sequences set forth in vhCDR1 SEQ ID NO: 14, vhCDR2 SEQ ID NO: 15 or vhCDR2 SEQ ID NO: 21, and vhCDR3 SEQ ID NO: 16 and
(b) light chain CDRs comprising amino acid sequences set forth in vlCDR1 SEQ ID NO: 11, vlCDR2 SEQ ID NO: 12, and vlCDR3 SEQ ID NO: 13.

2. The bispecific antigen-binding protein of claim 1 , which binds STEAP1 and CD3.

3. The bispecific antigen-binding protein of claim 2 , comprising a CD3 binding domain comprising CDR sequences of SEQ ID NOs: 170-172 and 174-176.

4. The bispecific antigen-binding protein of claim 1 , which is a heterodimeric antibody comprising:
a) a first monomer comprising a first heavy chain comprising:
1) a first variable heavy domain;
2) a first constant heavy chain comprising a first CH1 domain and a first Fc domain;
3) a scFv that binds human CD3 and comprises a scFv variable light domain comprising CDR amino acid sequences set forth in vlCDR1 SEQ ID NO: 174, vlCDR2 SEQ ID NO:175, and vlCDR3 SEQ ID NO: 176, an scFv linker, and a scFv variable heavy domain comprising CDR amino acid sequences set forth in vhCDR1 SEQ ID NO: 170, vhCDR2 SEQ ID NO: 171, and vhCDR3 SEQ ID NO: 172; wherein said scFv is covalently attached between the C-terminus of said CH1 domain and the N-terminus of said first Fc domain using domain linker(s);

b) a second monomer comprising a second heavy chain comprising a second variable heavy domain and a second constant heavy chain comprising a second Fc domain; and
c) a common light chain comprising a variable light domain and a constant light domain;
wherein said first variable heavy domain and said variable light domain bind human STEAP1, said second variable heavy domain and said variable light domain bind human STEAP1, and wherein
the first variable heavy domain and the second variable heavy domain comprise heavy chain CDRs comprising amino acid sequences (a) vhCDR1 SEQ ID NO: 14, (b) vhCDR2 SEQ ID NO: 15 or SEQ ID NO: 21, and (3) vhCDR3 SEQ ID NO: 16, and the variable light domain comprises light chain CDRs comprising amino acid sequences vlCDR1 SEQ ID NO: 11, vlCDR2 SEQ ID NO: 12, and vlCDR3 SEQ ID NO: 13.

5. The heterodimeric antibody of claim 4 , wherein the first monomer comprises amino acid substitutions E233P, L235V, G236A, S267K, R292C, N297G, V302C, E357Q, and S364K; the second monomer comprises the amino acid substitutions N208D, E233P, L235V, G236A, S267K, R292C, Q295E, N297G, V302C, L368D, K370S, N384D, Q418E, and N421D; and both monomers comprise a deletion at position 234.

6. The heterodimeric antibody of claim 4 , wherein said scFv comprises
a variable heavy domain comprising an amino acid sequence at least 90% identical to SEQ ID NO:169 and a variable light domain comprising an amino acid sequence at least 90% identical to SEQ ID NO: 173.

7. The heterodimeric antibody of claim 6 , wherein said scFv comprises a variable heavy region and a variable light region of SEQ ID NO:169 and SEQ ID NO:173.

8. The heterodimeric antibody of claim 4 , wherein said scFv has a charged scFv linker.

9. The heterodimeric antibody of claim 8 , wherein the charged scFv linker has a positive charge from 3 to 8 and is selected from the group consisting of SEQ ID NOs: 143 to 153.

10. The heterodimeric antibody of claim 8 , wherein the scFv linker comprises SEQ ID NO: 152.

11. The heterodimeric antibody of claim 4 , wherein said scFv comprises the sequence of SEQ ID NO: 44.

12. The heterodimeric antibody of claim 4 , wherein the first variable heavy domain and the second variable heavy domain comprise CDR sequences vhCDR1 comprising SEQ ID NO: 14, vhCDR2 comprising SEQ ID NO: 15, vhCDR3 comprising SEQ ID NO: 16.

13. The heterodimeric antibody of claim 12 , wherein the first variable heavy domain and the second variable heavy domain comprises an amino acid sequence at least 90% identical to SEQ ID NO: 182, and wherein the variable light domain comprises an amino acid sequence at least 90% identical SEQ ID NO: 183.

14. The heterodimeric antibody of claim 13 , wherein the first variable heavy domain and the second variable heavy domain comprise SEQ ID NO:
182 and the variable light domain comprises SEQ ID NO: 183.

15. The heterodimeric antibody of claim 4 , wherein the first variable heavy domain and the second variable heavy domain comprise SEQ ID NO: 184 and the variable light domain comprises SEQ ID NO: 183.

16. A heterodimeric antibody comprising a first monomer comprising the sequence of SEQ ID NO: 202, a second monomer comprising the sequence of SEQ ID NO: 201, and a common light chain comprising the sequence of SEQ ID NO:200.

17. A heterodimeric antibody comprising a first monomer comprising the sequence of SEQ ID NO: 19, a second monomer comprising the sequence of SEQ ID NO:18, and a common light chain comprising the sequence of SEQ ID NO:17.

18. A heterodimeric antibody comprising a first monomer comprises the sequence of SEQ ID NO: 207, a second monomer comprising the sequence of SEQ ID NO: 203, and a common light chain comprising the sequence of SEQ ID NO:200.

19. The heterodimeric antibody
of claim 4 , wherein the first variable heavy domain and the second variable heavy domain comprise CDR sequences vhCDR1 comprising SEQ ID NO: 14, vhCDR2 comprising SEQ ID NO: 21, vhCDR3 comprising SEQ ID NO: 16.

20. A pharmaceutical composition comprising the heterodimeric antibody of claim 4 .

21. A method of treating cancer in a subject in need thereof, the method comprising administering to the subject the heterodimeric antibody of claim 4 .

22. The method of claim 21 , further comprising administering to the subject an anti-PD-1 antigen-binding protein.

23. The method claim 22 , wherein the anti-PD1 antigen-binding protein comprises a vhCDR1 comprising the amino acid sequence set forth in SEQ ID NO: 189, a vhCDR2 comprising the amino acid sequence set forth in SEQ ID NO: 190, a vhCDR3 comprising the amino acid sequence set forth in SEQ ID NO: 191, a vlCDR1 comprising the amino acid sequence set forth in SEQ ID NO: 192, a vhCDR2 comprising the amino acid sequence set forth in SEQ ID NO: 193, and a vl CDR3 comprising the amino acid sequence set forth in SEQ ID NO: 194.

24. The method of claim 23 , wherein the anti-PD1 antigen-binding protein comprises a heavy chain variable domain comprising an amino acid sequence at least 90% identical to the amino acid sequence of SEQ ID NO: 195 and a light chain variable domain comprising an amino acid sequence at least 90% identical to the amino acid sequence of SEQ ID NO: 196.

25. The method of claim 24 , wherein the anti-PD1 antigen-binding protein comprises a heavy chain variable domain comprising the amino acid sequence of SEQ ID NO: 195 and a light chain variable domain comprising the amino acid sequence of SEQ ID NO: 196.

26. The method of claim 23 , wherein the anti-PD-1 antigen-binding protein is an antigen-binding antibody fragment.

27. The method of claim 23 , wherein the anti-PD-1 antigen-binding protein is an antibody.

28. The method of claim 23 , wherein the anti-PD1 antigen-binding protein comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 197 and a light chain comprising the amino acid sequence of SEQ ID NO: 198.

29. The method of claim 23 , wherein the ant

Assignees

• Amgen Inc
• Xencor Inc

Inventors

• Nolan-Stevaux Olivier
• Li Cong
• Murawsky Christopher M
• Alba Benjamin M
• Agrawal Neeraj Jagdish
• Graham Kevin
• Stevens Jennitte Leann
• Moore Gregory

Classifications

• A61K2039/505

  comprising antibodies · CPC title

• C07K2317/24

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

• A61P35/00 Primary

  Antineoplastic agents · CPC title

• C07K2317/622

  Single chain antibody (scFv) · CPC title

• C07K16/2809 Primary

  against the T-cell receptor (TcR)-CD3 complex · CPC title