%0 Journal Article
%A Braun, Angela
%A Frank, Annika M.
%A Ho, Naphang
%A Buchholz, Christian J.
%T Dasatinib is a potent enhancer for CAR T cell generation by CD3-targeted lentiviral vectors
%J Molecular therapy / Methods & clinical development
%V 28
%@ 2329-0501
%C New York, NY
%I Nature Publishing Group
%M DKFZ-2023-00008
%P 90 - 98
%D 2023
%X CD3-targeted lentiviral vectors (CD3-LVs) mediate selective transduction of human T lymphocytes in vitro and in vivo while simultaneously activating the targeted cells. Previously, we have demonstrated that CD3-LV leads to downmodulation of the CD3:T cell receptor (TCR) complex. We therefore hypothesized that inhibition of CD3 phosphorylation by Src/Abl tyrosine kinase inhibitors such as dasatinib results in enhancement of gene delivery by T cell-targeted LVs. Indeed, dasatinib treatment of T cells prior to incubation with CD3-LV increased reporter gene delivery by 3- to 10-fold. Moreover, the presence of dasatinib enhanced selective transduction into non-activated target cells present in whole blood. When combined with delivery of the CD19-chimeric antigen receptor (CAR) gene, dasatinib increased CAR T cell numbers by close to 10-fold. Importantly, the short-term exposure of T cells to dasatinib during vector incubation did not interfere with tumor cell killing by the resulting CAR T cells and rather came along with less upregulated exhaustion markers and a more naive phenotype. Our data suggest that dasatinib prevents CD3-LV-induced phosphorylation and CD3:TCR intake, thereby increasing the amount of CD3-LV bound to the cell surface. This is the first description of dasatinib as transduction enhancer, an activity particularly relevant for CAR T cell generation with CD3-LV.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1016/j.omtm.2022.12.002
%U https://inrepo02.dkfz.de/record/186556