Getting Past HSC Security: Cyclosporine H Gives Lentiviruses an Entry Pass

In this issue of Cell Stem Cell, Petrillo et al. (2018) improve lentiviral transduction of hematopoietic stem cells (HSCs) by using cyclosporine H to relieve viral entry restriction by interferon-induced transmembrane protein 3 (IFITM3). This finding promises to enhance the efficiency of ex vivo therapeutic gene transfer and gene editing of HSCs.

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