Foxp3 targeting agent compositions and methods of use for adoptive cell therapy

Patent metadata

Field	Value
Publication number	US-2022267420-A1
Application number	US-201916970332-A
Country	US
Kind code	A1
Filing date	Feb 14, 2019
Priority date	Feb 15, 2018
Publication date	Aug 25, 2022
Grant date	—

Abstract

Provided herein are compositions, kits, and methods for manufacturing cells for adoptive cell therapy comprising (a) an engineered receptor, vector encoding an engineered receptor, or engineered immune cell expressing such engineered receptor or comprising such vector; and (b) a Fox P3 targeting agent.

First claim

1 . A method of manufacturing an engineered immune cell, comprising: contacting a sample comprising a plurality of immune cells with (a) a vector encoding an engineered receptor; and (b) a forkhead box P3 (FoxP3) targeting agent, thereby producing an engineered immune cell that comprises the vector, optionally wherein the plurality of immune cells comprises one or more peripheral blood mononuclear cells (PBMCs).

2 . (canceled)

3 . The method of claim 1 , wherein the one or more PBMCs comprise a T cell, optionally wherein the T cell is a cytotoxic T cell, a helper T cell, a cluster of differentiation 8 positive (CD8+) T cell, a cluster of differentiation 4 positive (CD4+) T cell, or a regulatory T cell.

4 . (canceled)

5 . (canceled)

6 . (canceled)

7 . The method of claim 1 , wherein the plurality of immune cells comprises one or more FoxP3 positive (FoxP3 + ) cells; or comprises one or more FoxP3 + cells and one or more cells that do not express FoxP3.

8 . The method of claim 1 , wherein contacting the sample with the FoxP3 targeting agent reduces the number of FoxP3 + cells in the sample, optionally wherein contacting the sample with the FoxP3 targeting agent reduces the number of FoxP3 + cells in the sample by at least about 30%, 40%, 50%, 60%, 70%, 80%, 90% or more as compared to the number of FoxP3 + cells in the sample prior to contact with the FoxP3 targeting agent or reduces the number of FoxP3 + cells in the sample by at least about 30%, 40%, 50%, 60%, 70%, 80%, 90% or more as compared to the number of FoxP3 + cells in a control sample that has not been contacted with the FoxP3 targeting agent.

9 . (canceled)

10 . The method of claim 7 , wherein at least one of the one or more FoxP3 + cells is separated from the cells that do not express FoxP3.

11 . The method of claim 1 , wherein contacting the sample with the FoxP3 targeting agent comprises contacting the sample with two or more different FoxP3 targeting agents or wherein the sample is contacted with the FoxP3 targeting agent prior to, concurrently, or after being contacted with the vector.

12 . (canceled)

13 . The method of claim 1 , wherein the engineered receptor is selected from the group consisting of a chimeric antigen receptor (CAR), a chimeric antibody-T cell receptor (caTCR), and an engineered T cell receptor (eTCR).

14 . The method of claim 13 , wherein the CAR comprises at least one extracellular antigen-binding domain and/or at least one intracellular signaling domain, optionally wherein the at least one extracellular antigen-binding domain comprises a single chain variable region fragment (scFv) and/or the at least one intracellular signaling domain comprises a CD3ξ, polypeptide or fragment thereof.

15 . (canceled)

16 . The method of claim 1 , wherein the engineered receptor binds to a cell surface antigen, optionally wherein the cell surface antigen is selected from the group consisting of cluster of differentiation 19 (CD19), CD20, CD47, glypican 3 (GPC-3), Receptor Tyrosine Kinase-Like Orphan Receptor 1 (ROR1), ROR2, B Cell Maturation Antigen (BCMA), G Protein-Coupled Receptor Class C Group 5 Member D (GPRCSD), and Fc Receptor Like 5 (FCRL5).

17 . (canceled)

18 . The method of claim 1 , wherein the engineered receptor binds to a complex comprising a peptide and a major histocompatibility complex (MHC) protein, optionally wherein the peptide is derived from a protein selected from the group consisting of Wilms' tumor gene 1 (WT-1), alpha-fetoprotein (AFP), human papilloma virus 16 E7 protein (HPV16-E7), New York Esophageal Squamous Cell Carcinoma 1 (NY-ESO-1), preferentially expressed antigen of melanoma (PRAME), Epstein-Barr virus-latent membrane protein 2 alpha (EBV-LMP2A), human immunodeficiency virus 1 (HIV-1), KRAS, Histone H3.3, and prostate specific antigen (PSA).

19 . (canceled)

20 . The method of claim 1 , wherein the vector encoding the engineered receptor is a mammalian expression vector, a lentiviral vector or transposon vector.

21 . The method of claim 1 , wherein the FoxP3 targeting agent
comprises an antigen-binding protein that is an antibody, CAR, caTCR, or eTCR, or comprises antigen-binding fragment thereof; or comprises an antigen-binding protein that binds to a complex comprising a FoxP3-derived peptide and an MHC protein; or is a TCR molecule or comprises an antigen-binding portion of a TCR molecule.

22 . (canceled)

23 . The method of claim 21 , wherein the antigen-binding protein is coupled to a solid support.

24 . The method of claim 21 , wherein the antigen-binding protein is a bispecific antibody comprising: (a) an antigen-binding domain specific for a complex comprising the FoxP3 peptide and an MHC protein, and (b) an antigen-binding domain specific for cluster of differentiation 3 (CD3).

25 . The method of claim 21 , wherein the FoxP3 targeting agent is an anti-FoxP3 CAR-T cell.

26 . The method of claim 21 , wherein the FoxP3-derived peptide fragment is selected from FoxP3-1 having the amino acid sequence set forth in SEQ ID NO: 2 or a portion thereof, FoxP3-2 having the amino acid sequence set forth in SEQ ID NO: 3 or a portion thereof, FoxP3-3 having the amino acid sequence set forth in SEQ ID NO: 4 or a portion thereof, FoxP3-4 having the amino acid sequence set forth in SEQ ID NO: 5 or a portion thereof, FoxP3-5 having the amino acid sequence set forth in SEQ ID NO: 6 or a portion thereof, FoxP3-6 having the amino acid sequence set forth in SEQ ID NO: 7 or a portion thereof; and FoxP3-7 having the amino acid sequence set forth in SEQ ID NO: 8 or a portion thereof.

27 . The method of claim 26 , wherein the FoxP3 targeting agent comprises an antigen-binding protein comprising:
a. a heavy chain variable region CDR1 comprising an amino acid sequence set forth in SEQ ID NO: 16; a heavy chain variable region CDR2 comprising an amino acid sequence set forth in SEQ ID NO: 17; a heavy chain variable region CDR3 comprising an amino acid sequence set forth in SEQ ID NO: 18; a light chain variable region CDR1 comprising an amino acid sequence set forth in SEQ ID NO: 19; a light chain variable region CDR2 comprising an amino acid sequence set forth in SEQ ID NO: 20; and a light chain variable region CDR3 comprising an amino acid sequence set forth in SEQ ID NO: 21; b. a heavy chain variable region CDR1 comprising an amino acid sequence set forth in SEQ ID NO: 22; a heavy chain variable region CDR2 comprising an amino acid sequence set forth in SEQ ID NO: 23; a heavy chain variable region CDR3 comprising an amino acid sequence set forth in SEQ ID NO: 24; a light chain variable region CDR1 comprising an amino acid sequence set forth in SEQ ID NO: 25; a light chain variable region CDR2 comprising an amino acid sequence set forth in SEQ ID NO: 26; and a light chain variable region CDR3 comprising an amino acid sequence set forth in SEQ ID NO: 27; c. a heavy chain variable region CDR1 comprising an amino acid sequence set forth in SEQ ID NO: 28; a heavy chain variable region CDR2 comprising an amino acid sequence set forth in SEQ ID NO: 29; a heavy chain variable region CDR3 comprising an amino acid sequence set forth in SEQ ID NO: 30; a light chain variable region CDR1 comprising an amino acid sequence set forth in SEQ ID NO: 31; a light chain variable region CDR2 comprising an amino acid sequence set forth in SEQ ID NO: 32; and a light chain variable region CDR3 co

Assignees

• Memorial Sloan Kettering Cancer Center
• Eureka Therapeutics Inc

Inventors

• Scheinberg David A
• Liu Cheng
• Yang Zhiyuan
• Liu Lianxing
• Xu Shaohua
• Wang Pei
• Xu Yiyang

Classifications

• A61K40/4265

  Alpha-feto protein · CPC title

• A61K40/4243

  Wilms tumor 1 [WT1] · CPC title

• A61K40/4242

  Transcription factors, e.g. SOX or c-MYC · CPC title

• A61K40/4211

  CD19 or B4 · CPC title

• A61K40/4202

  Receptors, cell surface antigens or cell surface determinants · CPC title