CRISPR-edited CAR T Cells Enhance Fight Against Blood Cancers
Excerpt from the Press Release:
PHILADELPHIA— Knocking out a protein known to stifle T cell activation on CAR T cells using the CRISPR/Cas9 technology enhanced the engineered T cells’ ability to eliminate blood cancers, according to new preclinical data from researchers in the Perelman School of Medicine at the University of Pennsylvania and Penn’s Abramson Cancer Center.
The findings will be presented as an oral presentation at the 62nd American Society of Hematology Annual Meeting & Exposition on Dec. 7 (abstract #554).
The team knocked out the CD5 gene — which encodes for the CD5 protein on the surface of T cells and can inhibit their activation — on CAR T cells using CRISPR-Cas9 and infused them back into mice with T- and B-cell leukemia or lymphoma. Mice infused with the CD5-deleted CAR T cells showed higher levels of T cell proliferation in the peripheral blood, as well as a significant reduction in tumor size and better survival outcomes compared to mice infused with non-edited CAR T cells.
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