Study Investigating the Safety of CD19 CAR-T Cells in Relapsed/Refractory AML Expressing CD19

Refractory/Relapsed (R/R) acute myeloid leukemia (AML) is associated with a dis-mal prognosis. In some subsets of AML such as AML driven by the t(8;21) translocation, leading to the RUNX1-RUNX1T1 (AML1-ETO) fusion transcript expression, CD19 B-cell antigen is aberrantly expressed on malignant blasts in around 80 % of cases. Interestingly, the expression of the CD19 antigen is also detected in the CD34+ CD38-population leukemic stem cells. t(8;21) AML subtype has a rather good prognosis with an intensive chemotherapy regimen, but relapses occur in around 40 % of the patients and new therapeutic options are needed for these patients. Plesa et al, reported a successful treatment of a refractory t(8;21) AML with bispecific monoclonal antibodies that targets CD19. More recently, Danylesko et al, have reported long-term remission following CD19 CAR-T cells in a heavily pre-treated patient with t(8;21) AML(1). The same group has just submitted an abstract of 6 treated patients to the European Haematology Association (EHA) 2023 meet-ing: Six patients (adults-5, child-1) with t(8; 21) AML (confirmed by cytogenetic and FISH) and aberrant CD19 expression were included. One patient had a complex karyotype. Molecular analysis for CKIT, NPM1, IDH1, IDH2, and CBPa were nega-tive in all pts. One pt harbors the FLT3 ITD and TKD mutations. Median number of previous chemotherapy (CT) lines was 4 (3-8). Four patients were with chemo re-sistant relapse post allo-HCT (MSD-1, 10/10 MUD -3) 5-18 …

This description comes directly from the study's public registry record.

Ibrahim Yakoub-Agha, MD,PhD  ·  0320445962  ·  ibrahim.yakoubagha@chru-lille.fr

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