IP Library › Granted Patent US 12,458,654
Granted Patent B2
US 12,458,654 · App. 17/954,070 · Granted Nov 4, 2025

Methods of conditioning patients for T cell therapy

Inventors: Adrian Bot (Santa Monica, CA); Jeffrey Wiezorek (Santa Monica, CA); William Go (Santa Monica, CA); Rajul Jain (Santa Monica, CA); James N. Kochenderfer (Bethesda, MD); Steven A. Rosenberg (Bethesda, MD)
Assignees: Kite Pharma Inc.; United States of America, as represented by the Secretary, Department of Health and Human Services
A61K31/664A61K31/675A61K31/7076A61K38/2013A61K38/2053A61K40/11A61K40/31A61K40/4211A61K45/06A61P35/02A61K2239/31A61K2239/38A61K2239/48
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Quick Facts
Patent No.
US 12,458,654
App. No.
17/954,070
Granted
Nov 4, 2025
Kind
B2
Abstract

The invention provides methods of increasing the efficacy of a T cell therapy in a patient in need thereof. The invention includes a method of conditioning a patient prior to a T cell therapy, wherein the conditioning involves administering a combination of cyclophosphamide and fludarabine.

Claims (12)

1 . A method of treating a patient having a tumor comprising (i) administering to the patient a single dose of cyclophosphamide at about 900 mg/m 2 /day and one or more doses of fludarabine at about 25 mg/m 2 /day; and (ii) administering to the patient a therapeutically effective amount of engineered chimeric antigen receptor (CAR) T cells, wherein the patient is determined to have an increase in the serum levels of IL-15 of at least 5-fold, IL-7 of at least 2-fold, and an increase in at least one of MCP-1 or CRP of at least 1.5 fold or IP-10 of at least 2-fold on the day of but prior to administration of the CAR-T cells, after the administration of cyclophosphamide and fludarabine; wherein the tumor is a leukemia and the engineered CAR-T cells are anti-CD19 CAR-T cells.

2 . The method of claim 1 , wherein the administration of cyclophosphamide and fludarabine (i) reduces endogenous lymphocytes, (ii) increases a serum level of a homeostatic cytokine, (iii) enhances an effector function of T cells administered after the conditioning, (iv) enhances antigen presenting cell activation and/or availability, or (v) any combination thereof.

3 . The method of claim 1 , wherein each dose of fludarabine is administered daily for three days.

4 . The method of claim 1 , wherein each dose of cyclophosphamide is administered before, after, or concurrently with the dose of fludarabine.

5 . The method of claim 4 , wherein the dose of cyclophosphamide is administered before the dose of fludarabine.

6 . The method of claim 1 , wherein the cyclophosphamide is administered once on day −2 and/or the fludarabine is administered on days −4, −3, and −2.

7 . The method of claim 1 , wherein the administration of cyclophosphamide and fludarabine induces an improved antitumor efficacy of the CAR-T cell administration compared to the antitumor efficacy of the CAR-T cell administration without the administration of cyclophosphamide and fludarabine.

8 . The method of 1 , wherein the patient after the administration of cyclophosphamide and fludarabine and/or the T cell therapy further exhibits an increased serum concentration of a cytokine or a pro-inflammatory factor selected from the group consisting of IL-10, IL-5, IL-8, PLGF, SICAM-1, sVCAM-1, IL-1, IL-2, IL-3, IL-4, IL-6, IL-9, IL-11, IL-12, IL-13, IL-14, IL-15, IL-16, IL-17, IL-20, granulocyte macrophage colony-stimulating factor (GM-CSF), granulocyte colony-stimulating factor (G-CSF), vascular endothelial growth factor D (VEGF-D), macrophage inflammatory protein 1β (MIP-1β), leukemia inhibitory factor (LIF), oncostatin M (OSM), interferon (IFN) alpha, IFN-beta, IFN-gamma, tumor necrosis factor (TNF) alpha, TNF-beta, CD154, lymphotoxin (LT) beta, 4-1BB ligand (4-1BBL), a proliferation-inducing ligand (APRIL), CD70, CD153, CD178, glucocorticoid-induced TNFR-related ligand (GITRL), tumor necrosis factor superfamily member 14 (TNFSF14), OX40L, TNF-αnd ApoL-related leukocyte-expressed ligand 1 (TALL-1), TNF-related apoptosis-inducing ligand (TRAIL), chemokine (C-C motif) ligand (CCL) 1, macrophage inflammatory protein 1 alpha (MIP-1a or CCL3), CCL5, monocyte-specific chemokine 3 (MCP3 or CCL7), monocyte chemoattractant protein 2 (MCP-2 or CCL8), CCL13, thymus and activation regulated chemokine (TARC or CCL17), CCL22, and any combination thereof.

9 . The method of claim 1 , wherein a therapeutically effective amount of the engineered CAR T cells is about 1×10 6 cells/kg or 2×10 6 cells.

10 . The method of claim 1 , wherein the leukemia is acute lymphoblastic leukemia (ALL).

11 . The method of claim 1 , wherein the leukemia is selected from the group consisting of B-cell chronic lymphocytic leukemia, B-cell prolymphocytic leukemia, hairy cell leukemia, Burkitt leukemia, T-cell prolymphocytic leukemia, T-cell large granular lymphocyte leukemia, aggressive NK cell leukemia, adult T-cell leukemia, B-lymphoblastic leukemia, B-lymphoblastic leukemia with recurrent genetic abnormalities, and T-lymphoblastic leukemia.

12 . The method of claim 1 , wherein the leukemia is a lymphoblastic leukemia.

Continuity (6)
Continuation 15950042 · Apr 10, 2018
Continuation 15649369 · Jul 13, 2017
Continuation 15167977 · May 27, 2016
Provisional Application 62262143 · Dec 2, 2015
Provisional Application 62167750 · May 28, 2015
Related Publication 20230158075A1 · May 25, 2023
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English Translation of Official Action for Eurasian Application No. 2001792649 dated May 6, 2019, which is related to his subject application. [cited by applicant]
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Second Office Action in counterpart Chinese Application No. 201680030892.7, dated May 26, 2021. [cited by applicant]
English translation of Second Office Action in counterpart Chinese Application No. 201680030892.7, dated May 26, 2021. [cited by applicant]
Second Office Action in related Chinese Application No. 201680038203.7, dated Jun. 7, 2021. [cited by applicant]
English translation of Second Office Action in related Chinese Application No. 201680038203.7, dated Jun. 7, 2021. [cited by applicant]
Examination Report issued in related European Patent Application No. 16800846.4, mailed Jun. 23, 2021, 9 pages. [cited by applicant]
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Office Action issued in counterpart Brazilian application BR112017025166-3 on Sep. 14, 2021, and English Translation of the same. [cited by applicant]
Original and English Translation of Rejection Decision mailed Oct. 20, 2021, in Chinese Patent Application No. 201680030892.7. [cited by applicant]
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English language translation of Taiwan Office Action issued Jan. 6, 2022 in connection with Taiwan Application No. 105116879, 13 pages. [cited by applicant]
Taiwan Search Report issued Jan. 6, 2022 in connection with Taiwan Application No. 105116879, 1 page. [cited by applicant]
Australian Examination Report dated Mar. 29, 2022 in connection with co-pending Australian Application No. 2016268863, 3 pages (all references cited in this Office Action have been previously submitted in earlier IDSs). [cited by applicant]
Canadian Office Action issued Jul. 4, 2022 in connection with Canadian Application No. 2,986,793, which has related subject matter but is not foreign counterpart, 7 pages. [cited by applicant]
European Communication issued Sep. 16, 2022 in connection with European Application No. 16800846.4. which has related subject matter but is not foreign counterpart, 7 pages. [cited by applicant]
New Zealand Office Action issued Jul. 13, 2022 in connection with New Zealand Application No. 737359, 5 pages. [cited by applicant]
Japanese Office Action, with English translation, issued Jul. 26, 2022 in connection with Japanese Application No. 2017-561794, 10 pages. [cited by applicant]
Taiwan Office Action issued Sep. 13, 2022 in connection with Taiwan Application No. 105116879, 4 pages. [cited by applicant]
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Notice of Allowance issued Jul. 30, 2024 in Foreign Related but not Corresponding Israel Patent Application No. 284172 (3 pages). [cited by applicant]
Office Action issued Sep. 18, 2024 in Foreign Corresponding Australian Application Serial No. 2022224754 (6 pages). [cited by applicant]
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Rejection opinion issued on Dec. 9, 2024 for Foreign counterpart Brazil Application No. BR122023017010-5 with English Translation (13 pages). [cited by applicant]
Further Examination Report issued Nov. 26, 2024 counterpart NZ Application 776615. (6 pages). [cited by applicant]
Office Action issued Dec. 13, 2024 in foreign related but not counterpart Brazil Application No. BR122024003420-4 with English translation (8 pages). [cited by applicant]
Examination report issued Dec. 16, 2024 in foreign related but not counterpart Australian patent application 2022231653 (5 pages). [cited by applicant]
Preliminary Rejection issued on Oct. 28, 2024 in counterpart foreign KR Appln. No. 10-2023-7034999 with English translation. (8 pages). [cited by applicant]
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Office Action issued Dec. 3, 2024 in Foreign counterpart Canadian Application 2,986,798 (9 pages). [cited by applicant]
Final Rejection issued Jan. 13, 2025 in foreign counterpart Chinese Application No. 202210019434.0, with English translation (9 pages). [cited by applicant]
Notice of Allowance issued Jan. 28, 2025 to foreign counterpart Israeli Application No. 295224 (3 pages). [cited by applicant]
Decision of Final Rejection mailed Mar. 5, 2025 in foreign Counterpart Japanese Patent Application 2023-030596 with English translation (6 pages). [cited by applicant]
Notice of Application in Order of for Acceptance issued on Mar. 6, 2025 for foreign related but not counterpart New Zealand patent application 737358. (Two pages). [cited by applicant]
Examination Report issued Jan. 14, 2025 in related foreign but not counterpart European Application No. EP 23157411.2 (7 pages). [cited by applicant]
Rejection issued Jan. 14, 2025 in related foreign but not counterpart Brazilian Application No. BR122023022076-5, (6 pages). [cited by applicant]
Second Examination Report issued Mar. 4, 2025 in related but not Counterpart New Zealand Application No. 776400 (7 pages). [cited by applicant]
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Office Action issued Apr. 23, 2025 in Foreign Counterpart Application No. 112135845 in Taiwan with English translation. (11 pages). [cited by applicant]
Second Examination Report issued Apr. 30, 2025 in Foreign Counterpart Australian Application No. 2022224754 (4 pages). [cited by applicant]
Fifth Examination Report issued May 1, 2025 in Foreign Counterpart New Zealand Application No. 776615 (10 pages). [cited by applicant]
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Second Examination Report Issued Mar. 4, 2025 in Foreign Related but not Counterpart New Zealand Application No. 776402 (7 pages). [cited by applicant]
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Final Rejection Issued Jun. 9, 2025 in Foreign Counterpart Korean Application No. 10-2023-7034999 with English translation. (9 pages). [cited by applicant]
Third Examination Report Issued May 30, 2025 in Foreign Related but not Counterpart New Zealand Application No. 776400 (6 pages). [cited by applicant]
Gill, S. and June, C.H., ‘Going viral: chimeric antigen receptor Tcell therapy for hematological malignancies’, Immunological Reviews, vol. 263, No. 1, pp. 68-89. [cited by applicant]
Notice of Acceptance Issued Jul. 16, 2025 in Foreign Related but not Counterpart New Zealand Application No. 776400 (2 pages). [cited by applicant]
Notice of Acceptance Issued Jul. 16, 2025 in Foreign Related but not Counterpart New Zealand Application No. 776402 (2 pages). [cited by applicant]
Third Examination Report Issued Jul. 16, 2025 in Foreign Related but not Counterpart New Zealand Application No. 776402 (1 pages). [cited by applicant]
Fourth Examination Report Issued Jul. 16, 2025 in Foreign Related but not Counterpart New Zealand Application No. 776400 (1 pages). [cited by applicant]
Third Examination Report issued Jul. 10, 2025 in Foreign Counterpart Australian Application No. 2022224754 (2 pages). [cited by applicant]