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- W2969586911 abstract "Abstract Purpose: Anti-CD19 chimeric antigen receptor (CAR) T cells represent a novel immunotherapy and are highly effective in treating relapsed/refractory B-cell non-Hodgkin's lymphoma (B-NHL). How tumor microenvironment influences clinical response to CAR T therapy remains of great interest. Patients and Methods: A phase I, first-in-human, dose-escalation study of anti-CD19 JWCAR029 was conducted in refractory B-NHL (NCT03355859) and 10 patients received CAR T cells at an escalating dose of 2.5 × 107(n = 3), 5 × 107(n = 4), and 1 × 108(n = 3) cells. Core needle biopsy was performed on tumor samples collected from diffuse large B-cell lymphoma patients on Day −6 (1 day before lymphodepletion) and on Day 11 after CAR T-cell infusion when adequate CAR T-cell expansion was detected. Results: The overall response rate was 100%, with 6 of 9 (66.7%) evaluable patients achieving complete remission. The most common adverse events of grade 3 or higher were neutropenia (10/10, 100%), anemia (3/10, 30%), thrombocytopenia (3/10, 30%), and hypofibrinogenemia (2/10, 20%). Grade 1 cytokine release syndrome occurred in all patients and grade 3 neurotoxicity in 1 patient. The average peak levels of peripheral blood CAR T cells and cytokines were similar in 3 different dose levels, but CAR T cells were significantly higher in patients achieved complete remission on Day 29. Meanwhile, RNA sequencing identified gene expression signatures differentially enriched in complete and partial remission patients. Increased tumor-associated macrophage infiltration was negatively associated with remission status. Conclusions: JWCAR029 was effective and safe in treating refractory B-NHL. The composition of the tumor microenvironment has a potential impact in CAR T therapy response." @default.
- W2969586911 created "2019-08-29" @default.
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- W2969586911 date "2019-12-01" @default.
- W2969586911 modified "2023-10-17" @default.
- W2969586911 title "Clinical Efficacy and Tumor Microenvironment Influence in a Dose-Escalation Study of Anti-CD19 Chimeric Antigen Receptor T Cells in Refractory B-Cell Non-Hodgkin's Lymphoma" @default.
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- W2969586911 doi "https://doi.org/10.1158/1078-0432.ccr-19-0101" @default.
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