Lowering mTORC1 Drives CAR T-Cells Home in Acute Myeloid Leukemia.

Maiti, Abhishek; Daver, Naval G · Clin Cancer Res · 2021

basic_science · Level V

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Abstract

Cellular therapies have demonstrated limited efficacy thus far in acute myeloid leukemia (AML). A recent study shows that mTOR complex 1 activation downregulated CXCR4 reducing marrow infiltration of EpCAM-targeting chimeric antigen receptor (CAR) T-cells in AML. Abrogating mTOR signaling by cotreatment with mTOR inhibitors during IL2-mediated <i>ex vivo</i> expansion upregulated CXCR4 and bolstered bone marrow migration and AML elimination by CAR T-cells.<i>See related article by Nian et al., p. 6026</i>.

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