Methods for Generating Engineered Lymphocytes

Patent metadata

Field	Value
Publication number	US-2025375480-A1
Application number	US-202519231858-A
Country	US
Kind code	A1
Filing date	Jun 9, 2025
Priority date	Jun 11, 2024
Publication date	Dec 11, 2025
Grant date	—

Abstract

Provided herein are improvements to the conventional CAR-T cell manufacturing process. Specifically, the instant disclosure is related to processes for generating CAR-T cells by activating T cells selected from an apheresis sample by using a soluble anti-CD3 antibody, and without the use of an anti-CD28 antibody. The method includes the selection of monocytes from the apheresis sample and incubating the selected monocytes with the selected T cells prior to transduction of the T cells.

First claim

1 . A method for manufacturing transduced lymphocytes, comprising:
selecting for a population of monocytes expressing CD14 and for a population of lymphocytes from a sample obtained from a donor subject; culturing the population of monocytes expressing CD14 with the population of lymphocytes; activating the population of lymphocytes by stimulating the population of lymphocytes with a T cell stimulating agent; and incubating the population of lymphocytes with a polynucleotide vector to transduce the population of lymphocytes to produce transduced lymphocytes, wherein the population of lymphocytes comprises a subset of lymphocytes expressing CD4 and a subset of lymphocytes expressing CD8, and
wherein the activating is carried out in a closed system.

2 . The method of claim 1 , wherein the selecting for the population of monocytes expressing CD14 and for the population of lymphocytes from the sample obtained from the donor subject comprises:
contacting the sample with an anti-CD4 antibody and bead conjugate, an anti-CD8 antibody and bead conjugate, and an anti-CD14 antibody and bead conjugate so as to generate a labeled population of cells expressing CD4, a labeled population of cells expressing CD8, and a labeled population of cells expressing CD14; and isolating the labeled population of cells expressing CD4, the labeled population of cells expressing CD8, and the labeled population of cells expressing CD14 from the sample.

3 . The method of claim 1 , wherein the selecting for the population of monocytes expressing CD14 and for the population of lymphocytes from the sample obtained from the donor subject comprises a step of contacting the sample with an anti-CD14 antibody and bead conjugate and a separate step of contacting the sample with an anti-CD4 antibody and bead conjugate and an anti-CD8 antibody and bead conjugate.

4 . The method of claim 1 , wherein the selecting for the population of monocytes expressing CD14 and for the population of lymphocytes from the sample obtained from the donor subject comprises a step of simultaneously contacting the sample with an anti-CD14 antibody and bead conjugate, an anti-CD4 antibody and bead conjugate, and an anti-CD8 antibody and bead conjugate.

5 . The method of claim 1 , wherein the activating is done prior to incubating the population of lymphocytes with the polynucleotide vector.

6 . The method of claim 5 , wherein the T cell stimulating agent comprises an anti-CD3 antibody and a cytokine, and
wherein in the cytokine is Interleukin-2, Interlukin-7, or Interlukin-21.

7 . (canceled)

8 . The method of claim 5 , wherein the T cell stimulating agent is not an anti-CD28 antibody.

9 . (canceled)

10 . The method of claim 5 , wherein the T cell stimulating agent is a soluble anti-CD3 antibody.

11 . The method of claim 10 , wherein the soluble anti-CD3 antibody is coupled to a monocyte.

12 . The method of claim 1 , wherein the culturing the population of monocytes expressing CD14 with the population of lymphocytes comprises culturing the population of monocytes expressing CD14 with the population of lymphocytes at a ratio of 1:1.

13 .- 15 . (canceled)

16 . The method of claim 1 , wherein the culturing the population of monocytes expressing CD14 with the population of lymphocytes comprises culturing the population of monocytes expressing CD14 with the population of lymphocytes at a ratio of 2:1.

17 . (canceled)

18 . (canceled)

19 . The method of claim 1 , wherein the population of lymphocytes are incubated with the T cell stimulating agent for up to 72 hours.

20 .- 22 . (canceled)

23 . The method of any one of claims 1 to 22 , further comprising:
culturing the transduced lymphocytes for up to 72 hours before the transduced lymphocytes are harvested to produce a harvested sample, and
wherein the culturing is carried out in a closed system.

24 .- 26 . (canceled)

27 . The method of claim 1 , further comprising, following the harvesting, administering the harvested sample to a subject in need thereof or freezing the harvested sample.

28 . (canceled)

29 . The method of claim 1 , wherein the sample obtained from the donor subject comprises whole blood, washed leukapheresis cells, or peripheral blood mononuclear cells (PBMCs).

30 . The method of claim 1 , wherein the polynucleotide vector is a retroviral vector or a lentiviral vector,
wherein the polynucleotide vector encodes a chimeric antigen receptor (CAR) or a T cell receptor (TCR), and wherein the CAR or the TCR recognizes a tumor antigen.

31 .- 33 . (canceled)

34 . The method of claim 32 , wherein the tumor antigen is selected from a tumor-associated surface antigen, such as 5T4, alphafetoprotein (AFP), B7-1 (CD80), B7-2 (CD86), BCMA, B-human chorionic gonadotropin, CA-125, carcinoembryonic antigen (CEA), CD123, CD133, CD138, CD19, CD20, CD22, CD23, CD24, CD25, CD30, CD33, CD34, CD4, CD40, CD44, CD56, CD79a, CD79b, CD123, FLT3, BCMA, SLAMF7, CD8, CLL-1, c-Met, CMV-specific antigen, CS-1, CSPG4, CTLA-4, DLL3, disialoganglioside GD2, ductal-epithelial mucine, EBV-specific antigen, EGFR variant III (EGFRvIII), ELF2M, endoglin, ephrin B2, epidermal growth factor receptor (EGFR), epithelial cell adhesion molecule (EpCAM), epithelial tumor antigen, ErbB2 (HER2/neu), fibroblast associated protein (fap), FLT3, folate binding protein, Fc receptor-like protein 5, GD2, GD3, glioma-associated antigen, glycosphingolipids, gp36, HBV-specific antigen, HCV-specific antigen, HER1-HER2, HER2-HER3 in combination, HERV-K, high molecular weight-melanoma associated antigen (HMW-MAA), MAA), HIV-1 envelope glycoprotein gp41, HPV-specific antigen, human telomerase reverse transcriptase, IGFI receptor, IGF-II, IL-11Ralpha, IL-13R-a2, Influenza Virus-specific antigen;
CD38, insulin growth factor (IGF1)-1, intestinal carboxyl esterase, kappa chain, LAGA-1a, lambda chain, Lassa Virus-specific antigen, lectin-reactive AFP, lineage-specific or tissue specific antigen such as CD3, MAGE, MAGE-A1, major histocompatibility complex (MHC) molecule, major histocompatibility complex (MHC) molecule presenting a tumor-specific peptide epitope, M-CSF, melanoma-associated antigen, mesothelin, MN-CA IX, MUC-1, mut hsp70-2, mutated p53, mutated ras, neutrophil elastase, NKG2D, Nkp30, NY-ESO-1, p53, PAP, prostase, prostate specific antigen (PSA), prostate-carcinoma tumor antigen-1 (PCTA-1), prostate-specific antigen protein, STEAP1, STEAP2, PSMA, RAGE-1, ROR1, RU1, RU2 (AS), surface adhesion molecule, survivin and telomerase, TAG-72, TACI, the extra domain A (EDA) and extra domain B (EDB) of fibronectin and the Al domain of tenascin-C (TnC Al), thyroglobulin, tumor stromal antigens, vascular endothelial growth factor receptor-2 (VEGFR2), virus-specific surface antigen such as an HIV-specific antigen (such as HIV gpl20), GPC3 (Glypican 3), EphA2, GPC2, CD133, LGR5, TROP2, CD146, CLDN3, CLDN4, CLDN6, CLDN9, CLDN18.2, CD70, TnMUC1, Alkaline phosphatase (placental type), MUC16, MUC17, MART1, Pmel17, Melanoma-associated chondroitin sulfate proteoglycan, as well as any derivate or variant of these antigens.

35 . A population of cells prepared by the method of claim 1 .

36 . A pharmaceutical composition comprising the population of cells of claim 35 .

37 . A method for administering T cells to a subject, comprising injecting to the subject a harvested sam

Assignees

• Kite Pharma Inc

Inventors

• Haso Waleed
• Geragosian Melody

Classifications

• C07K16/2803

  against the immunoglobulin superfamily · CPC title

• C07K16/2809

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

• C12N2740/10043

  viral genome or elements thereof as genetic vector · CPC title

• C12N2510/00

  Genetically modified cells · CPC title

• C12N2501/515

  CD3, T-cell receptor complex · CPC title