IP Library › Granted Patent US 12,583,923
Granted Patent B2
US 12,583,923 · App. 19/006,997 · Granted Mar 24, 2026

Chimeric antigen and T cell receptors and methods of use

Inventors: Arianne Perez (Woodland Hills, CA); Stuart A. Sievers (Van Nuys, CA); Ruben Alvarez Rodriguez (Los Angeles, CA); Jonathan Belk (Lebanon, NH); Jed Wiltzius (Woodland Hills, CA)
Assignee: Kite Pharma, Inc.
C07K16/2803A61K40/11A61K40/31A61K40/4211A61K40/4221A61P35/00C07K16/2887C07K16/2896C12N5/0636C12N5/10C12N15/63A61K2039/505A61K2239/29A61K2239/31A61K2239/38C07K2317/24C07K2317/56C07K2317/565C07K2317/622C07K2317/73C07K2317/76
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Quick Facts
Patent No.
US 12,583,923
App. No.
19/006,997
Granted
Mar 24, 2026
Kind
B2
Abstract

Provided is a chimeric antigen receptor (CAR) or a T cell receptor (TCR) comprising one or more of the antigen binding motifs disclosed herein. Aspects of the disclosure relate to a polynucleotide encoding a chimeric antigen receptor (CAR) or a T cell receptor (TCR) comprising one or more of the antigen binding motifs. Provided are antibodies and antigen binding systems that comprise a binding motif that binds CD20 and optionally a binding motif that binds CD19, and methods of producing and using the same. Antibodies and antigen binding systems of the present disclosure comprise CARs that comprise an anti-CD20 binding motif and an anti-CD19 binding motif. Provided are compositions, such as antibodies and CARs that are or comprise an anti-CD20/anti-CD19 antigen binding system of the present disclosure, and cell therapies comprising the same, are useful, e.g., in the treatment of cancer.

Claims (29)

1 . A polynucleotide encoding an anti-CD20 chimeric antigen receptor (CAR) comprising an anti-CD20 antigen-binding fragment, wherein the anti-CD20 antigen-binding fragment comprises a heavy chain variable domain (VH) comprising heavy chain complementarity determining regions HCDR1, HCDR2 and HCDR3, and a light chain variable domain (VL) comprising light chain complementarity determining regions LCDR1, LCDR2 and LCDR3, wherein the HCDR1, HCDR2, HCDR3, LCDR1, LCDR2 and LCDR3, respectively, comprise the amino acid sequences of SEQ ID NO:48, 51, 54, 59, 62 and 65.

2 . The polynucleotide of claim 1 , wherein the VH comprises the amino acid sequence of SEQ ID NO:45 and the VL comprises the amino acid sequence of SEQ ID NO:56.

3 . The polynucleotide of claim 1 , which further encodes an anti-CD19 CAR comprising an anti-CD19 antigen-binding fragment having specificity to CD19.

4 . The polynucleotide of claim 3 , wherein the anti-CD19 antigen-binding fragment comprises a VH comprising HCDR1, HCDR2, and HCDR3, and a VL comprising LCDR1, LCDR2 and LCDR3, wherein the HCDR1, HCDR2, HCDR3, LCDR1, LCDR2 and LCDR3, respectively, comprise the amino acid sequences of SEQ ID NO:224, 227, 230, 235, 238, and 241.

5 . The polynucleotide of claim 4 , wherein the VH of the anti-CD19 antigen-binding fragment comprises the amino acid sequence of SEQ ID NO:221, and the VL of the antigen-binding fragment comprises the amino acid sequence of SEQ ID NO:232.

6 . The polynucleotide of claim 4 , wherein the anti-CD20 antigen-binding fragment or the anti-CD19 antigen-binding fragment is a single chain fragment (scFv).

7 . The polynucleotide of claim 4 , wherein the anti-CD20 CAR and the anti-CD19 CAR each further comprise a transmembrane domain of CD8 alpha or CD28.

8 . The polynucleotide of claim 7 , wherein the anti-CD20 CAR and the anti-CD19 CAR each further comprise a signaling domain of 4-1BB or CD28.

9 . The polynucleotide of claim 8 , wherein the anti-CD20 CAR and the anti-CD19 CAR each further comprise a CD3z stimulatory domain.

10 . The polynucleotide of claim 4 , which further comprises a cleavable linker between the anti-CD20 CAR and the anti-CD19 CAR.

11 . The polynucleotide of claim 10 , wherein the cleavable linker is a 2A linker.

12 . A cell comprising the polynucleotide of claim 1 .

13 . A polynucleotide encoding an anti-CD20 chimeric antigen receptor (CAR) comprising an anti-CD20 antigen-binding fragment, wherein the anti-CD20 antigen-binding fragment comprises a heavy chain variable domain (VH) comprising heavy chain complementarity determining regions HCDR1, HCDR2 and HCDR3, and a light chain variable domain (VL) comprising light chain complementarity determining regions LCDR1, LCDR2 and LCDR3, wherein the HCDR1, HCDR2, HCDR3, LCDR1, LCDR2 and LCDR3, respectively, comprise the amino acid sequences of SEQ ID NO:70, 73, 76, 81, 84, and 87.

14 . The polynucleotide of claim 13 , wherein the VH comprises the amino acid sequence of SEQ ID NO:67 and the VL comprises the amino acid sequence of SEQ ID NO:78.

15 . The polynucleotide of claim 14 , which further encodes an anti-CD19 CAR comprising an anti-CD19 antigen-binding fragment having specificity to CD19.

16 . The polynucleotide of claim 15 , wherein the anti-CD19 antigen-binding fragment comprises a VH comprising HCDR1, HCDR2, and HCDR3, and a VL comprising LCDR1, LCDR2 and LCDR3, wherein the HCDR1, HCDR2, HCDR3, LCDR1, LCDR2 and LCDR3, respectively, comprise the amino acid sequences of SEQ ID NO:224, 227, 230, 235, 238, and 241.

17 . The polynucleotide of claim 16 , wherein the VH of the anti-CD19 antigen-binding fragment comprises the amino acid sequence of SEQ ID NO:221, and the VL of the antigen-binding fragment comprises the amino acid sequence of SEQ ID NO:232.

18 . The polynucleotide of claim 17 , wherein the anti-CD20 antigen-binding fragment or the anti-CD19 antigen-binding fragment is a single chain fragment (scFv).

19 . The polynucleotide of claim 18 , wherein the anti-CD20 scFv and the anti-CD19 scFv each further comprises a linker between the VH and the VL.

20 . The polynucleotide of claim 19 , wherein the linker comprises the amino acid sequence of SEQ ID NO:247.

21 . The polynucleotide of claim 20 , wherein the anti-CD20 CAR further comprises a transmembrane domain of CD8 alpha.

22 . The polynucleotide of claim 21 , wherein the anti-CD20 CAR further comprises a signaling domain of 4-1BB.

23 . The polynucleotide of claim 22 , wherein the anti-CD19 CAR further comprises a transmembrane domain of CD28.

24 . The polynucleotide of claim 23 , wherein the anti-CD19 CAR further comprises a signaling domain of CD28.

25 . The polynucleotide of claim 24 , wherein the anti-CD20 CAR and the anti-CD19 CAR each further comprise a CD3z signaling domain.

26 . The polynucleotide of claim 25 , which further comprises a cleavable linker between the anti-CD20 CAR and the anti-CD19 CAR.

27 . The polynucleotide of claim 26 , wherein the cleavable linker is a 2A linker.

28 . A cell comprising the polynucleotide of claim 27 .

29 . A method of generating an engineered cell, the method comprising transfecting or transducing a cell with a polynucleotide according to claim 27 .

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 29, 2025
From: PEREZ, ARIANNE; SIEVERS, STUART A.; RODRIGUEZ, RUBEN ALVAREZ
To: KITE PHARMA, INC.
Reel/Frame 070973/0752 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 29, 2025
From: ADIMAB, LLC
To: KITE PHARMA, INC.
Reel/Frame 070973/0748 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 29, 2025
From: WILTZIUS, JED
To: KITE PHARMA, INC.
Reel/Frame 070973/0888 →
Continuity (4)
Continuation 18470745 · Sep 20, 2023
Division 16711180 · Dec 11, 2019
Provisional Application 62778893 · Dec 12, 2018
Related Publication 20250145707A1 · May 8, 2025
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