**2024 ASCO: National Institute’s New CAR-T Therapy CD7 CAR-T Cells, Multiple Blood Cancer Destroyers**
**2024 ASCO: National Institute’s New CAR-T Therapy CD7 CAR-T Cells, Multiple Blood Cancer Destroyers**
CAR-T Therapy
**2024 ASCO: Four Chinese-developed CAR-T therapies make a significant impact, targeting colorectal cancer, pancreatic cancer, and hematological tumors, with an overall response rate nearing 100.0%**
**CD7 CAR-T Cells: A Powerful Strike Against Hematological Tumors, Patients Achieve Complete Remission**
Patients with relapsed or refractory hematologic malignancies have limited treatment options and poor prognosis, with a 5-year overall survival rate of less than 20%. While allogeneic hematopoietic stem cell transplantation (HSCT) provides a critical strategy for treating aggressive hematologic cancers, HSCT treatment can also result in adverse reactions such as graft-versus-host disease (GVHD) and conditioning-related toxicities. Additionally, some patients with poor health cannot undergo this treatment. Therefore, new treatment methods are urgently needed, and the emergence of CAR-T therapy has brought new hope to patients with hematologic tumors.
The world-renowned journal, *The New England Journal of Medicine*, reported on a clinical study of “CD7 CAR-T cells for the treatment of relapsed or refractory CD7-positive hematologic tumors” (NCT04599556).
From November 2021 to September 2023, 10 patients with relapsed or refractory CD7-positive cancers were enrolled in the study, including 7 cases of acute myeloid leukemia (AML), 2 cases of T-cell acute lymphoblastic leukemia (ALL), and 1 case of T-cell lymphoblastic lymphoma (IVA stage). The median age was 56.5 years (range, 13.7–72.5 years). All patients had bone marrow involvement, with a median blast cell percentage of 36.0% (range, 2–87), and a median CD7 expression on blast cells of 93.0% (range, 80.7–97.7). All patients had received extensive prior treatments, with a median of 9.5 courses (range, 4–15 courses). After enrollment, patients first received an intensive lymphocyte-depleting regimen (cyclophosphamide, fludarabine, etoposide) and then CD7 CAR-T cell infusion therapy. After a median follow-up of 15.1 months, the results showed:
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**Complete Remission (CR):** All patients (n=10) achieved complete remission (CR) after CAR-T cell therapy, though hematologic recovery was incomplete, with grade 4 pancytopenia. As of November 8, 2023 (data cutoff date), 6 patients had not received any further treatment and remained in minimal residual disease (MRD) negative complete remission.
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**Overall Survival Rate:** The estimated 1-year overall survival rate was 68% [95% Confidence Interval (CI), 43–100].
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**Disease-Free Survival Rate:** The estimated 1-year disease-free survival rate was 54% (95% CI, 29–100).