IP Library Granted Patent US 12,545,739
Granted Patent B2
US 12,545,739 · App. 16/764,331 · Granted Feb 10, 2026

Compositions and methods for making and using bispecific antibodies

Inventors: Jogender Tushir-Singh (Free Union, VA); Sanchita Bhatnagar (Free Union, VA)
Assignee: University of Virginia Patent Foundation
C07K16/2878A61P35/00A61K9/0019A61K2039/505A61K2039/545C07K2317/24C07K2317/526C07K2317/56C07K2317/92
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Quick Facts
Patent No.
US 12,545,739
App. No.
16/764,331
Granted
Feb 10, 2026
Kind
B2
Abstract

A bispecific antibody that includes a first antigen binding site that is specific for a death receptor 5 (DR5) polypeptide and a second antigen binding site that is specific for a folate receptor alpha-1 (FOLR1) polypeptide, wherein the bispecific antibody includes: (i) a heavy chain amino acid sequence that includes SEQ ID NO:1 and a light chain amino acid sequence that includes SEQ ID NO:2; (ii) a heavy chain amino acid sequence that includes SEQ ID NO:11 and a light chain amino acid sequence that includes SEQ ID NO:2; (iii) a heavy chain amino acid sequence that includes SEQ ID NO:5 and a light chain amino acid sequence that includes SEQ ID NO: 6; or (iv) an scFv fragment that includes a knob-into-hole structure comprising SEQ ID NOs: 3 and 4.

Claims (42)

1 . A bispecific antibody that binds to death receptor 5 (DR5) and folate receptor alpha-1 (FOLR1), wherein said bispecific antibody comprises a first antigen binding site that is specific for said DR5 and a second antigen binding site that is specific for said FOLR1, and wherein the bispecific antibody comprises:

(i) a heavy chain amino acid sequence comprising SEQ ID NO:1 and a light chain amino acid sequence comprising SEQ ID NO:2;

(ii) a heavy chain amino acid sequence comprising SEQ ID NO:11 and a light chain amino acid sequence comprising SEQ ID NO:2;

(ii) a heavy chain amino acid sequence comprising SEQ ID NO:5 and a light chain amino acid sequence comprising SEQ ID NO:6; or

(iv) an scFv fragment comprising a knob-into-hole structure comprising SEQ ID NOs: 3 and 4.

2 . The bispecific antibody of claim 1 , wherein said antigen binding site specific for said DR5 is linked to the carboxy terminus of the CH3 constant region, wherein the CH3 constant region is of the heavy chain.

3 . The bispecific antibody of claim 1 , wherein the binding affinity of said DR5 to the antigen binding site specific for DR5 and the binding affinity of said FOLR1 to the antigen binding site specific for FOLR1 are unchanged in the bispecific antibody relative to binding affinities for these antigens when the antigen binding site specific for DR5 and the antigen binding site specific for FOLR1 are present as monospecific antibodies.

4 . The bispecific antibody of claim 1 , wherein the bispecific antibody is Bispecific-Anchored Cytotoxicity-Activator-1 (BaCa-1), said antibody comprising the heavy chain of SEQ ID NO:1 and the light chain of SEQ ID NO:2.

5 . The bispecific antibody of claim 1 , wherein the antibody is humanized.

6 . The bispecific antibody of claim 1 , wherein the bispecific antibody is BaCa-2, said antibody comprising a knob-into-hole structure comprising SEQ ID NO:3 and SEQ ID NO:4, wherein SEQ ID NO:3 and SEQ ID NO: 4 together form the knob-into-hole structure.

7 . The bispecific antibody of claim 1 , wherein the bispecific antibody is BaCa-3, said antibody comprising the heavy chain comprising SEQ ID NO:5 and the light chain comprising SEQ ID NO:6.

8 . The bispecific antibody of claim 1 , wherein the bispecific antibody is Chimeric BaCa (ChiBaCa), said antibody comprising the heavy chain comprising SEQ ID NO: 11 and the light chain comprising SEQ ID NO: 2.

9 . A pharmaceutical composition comprising a pharmaceutically acceptable carrier and the bispecific antibody of claim 1 .

10 . The pharmaceutical composition of claim 9 , wherein the bispecific antibody is BaCa-1, and wherein BaCa-1 comprises the heavy chain of SEQ ID NO: 1 and the light chain of SEQ ID NO:2.

11 . A method for treating cancer, said method comprising administering to a subject in need thereof a therapeutically effective amount of a pharmaceutical composition of claim 9 , thereby treating said cancer.

12 . The method of claim 11 , wherein said cancer comprises:

a) cancer cells expressing FOLR1 and DR5; or

b) cancer cells expressing FOLR1, but not DR5, and adjacent stromal cells expressing DR5 or other cells adjacent to said cancer cells expressing DR5; or

c) cancer cells expressing FOLR1 and DR5 and adjacent stromal cells expressing DR5 or other cells adjacent to said cancer cells expressing DR5.

13 . The method of claim 12 , wherein said cancer cells express high levels of FOLR1.

14 . The method of claim 11 , wherein said cancer is ovarian cancer.

15 . The method of claim 14 , wherein said ovarian cancer is serous ovarian cancer.

16 . The method of claim 15 , wherein said serous ovarian cancer is high-grade serous carcinoma.

17 . The method of claim 11 , wherein said cancer is endometrioid adenocarcinoma.

18 . The method of claim 17 , wherein said endometrioid adenocarcinoma is high-grade endometrioid adenocarcinoma.

19 . The method of claim 11 , wherein the bispecific antibody restricts DR5-mediated apoptotic activation toward FOLR1 positive cancer cells.

20 . The method of claim 11 , wherein said method eliminates antibody-dependent cellular cytotoxicity (ADCC).

21 . The method of claim 11 , wherein the bispecific antibody is BaCa-1, the bispecific antibody comprising a heavy chain of SEQ ID NO: 1 and a light chain of SEQ ID NO:2, or biologically active fragments thereof.

22 . The method of claim 11 , wherein said method induces DR5 oligomerization.

23 . The method of claim 11 , wherein said method inhibits tumor growth.

24 . The method of claim 11 , wherein said pharmaceutical composition is administered parenterally, intravenously, or intraperitoneally.

25 . The method of claim 24 , wherein said method stimulates tumor regression.

26 . The method of claim 11 , wherein the bispecific antibody binds to DR5 and FOLR1 polypeptides present on a single cell to stimulate cis cytotoxicity in said cancer.

27 . The method of claim 11 , wherein the bispecific antibody binds to DR5 and FOLR1 polypeptides present on different cells to stimulate trans cytotoxicity in said cancer.

28 . The method of claim 11 , wherein the bispecific antibody binds to death receptor 5 (DR5) and folate receptor alpha-1 (FOLR1) on the same cancer cell.

29 . The method of claim 11 , wherein the antigen binding site specific for said DR5 binds to said DR5 and the antigen binding site specific for said FOLR1 binds to said FOLR1 on the same cancer cell.

30 . The method of claim 11 , wherein the antigen binding site specific for said DR5 binds to DR5 on a first cancer cell and the antigen binding site specific for said FOLR1 binds to FOLR1 on a second cancer cell.

31 . The method of claim 11 , wherein binding of said antigen binding site specific for said DR5 to said DR5 and binding of said binding site specific for said FOLR1 to FOLR1 induces apoptosis of a cancer cell.

32 . The method of claim 11 , wherein the bispecific antibody is administered at a dose ranging from about 0.1 to about 20.0 mg/kg body weight.

33 . The method of claim 32 , wherein said dose is selected from the group consisting of 0.1, 0.5, 0.75, 0.83, 1.0, 1.25, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6,5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, and 20.0 mg/kg body weight.

34 . The method of claim 33 , wherein said dose is selected from the group consisting of 0.83, 1.0, 1.25, and 5.0 mg/kg body weight.

35 . The method of claim 11 , wherein an additional therapeutic agent is administered.

Assignments (3)
CONFIRMATORY LICENSE Recorded Oct 13, 2022
From: UNIVERSITY OF VIRGINIA
To: UNITED STATES GOVERNMENT
Reel/Frame 061664/0890 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 18, 2021
From: TUSHIR-SINGH, JOGENDER; BHATNAGAR, SANCHITA
To: UNIVERSITY OF VIRGINIA
Reel/Frame 056892/0592 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 18, 2021
From: UNIVERSITY OF VIRGINIA
To: UNIVERSITY OF VIRGINIA PATENT FOUNDATION
Reel/Frame 056892/0596 →
Continuity (2)
Provisional Application 62585647 · Nov 14, 2017
Related Publication 20200283537A1 · Sep 10, 2020
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