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Gong, Ying; Klein Wolterink, Roel G.J.; Janssen, Ian; Groot, Arjan J.; Bos, Gerard M.J.; Germeraad, Wilfred T.V.
Molecular therapy. Methods & clinical development, 06/2020, Letnik: 17Journal Article
Adoptive natural killer (NK) cell therapy is attaining promising clinical outcomes in recent years, but improvements are needed. Genetic modification of NK cells with a tumor antigen-specific receptor on their surface coupled to intracellular signaling domains may lead to enhanced cytotoxicity against malignant cells. One of the most common approaches is by lentivirus-mediated transduction. However, NK cells are difficult to transduce and various methods have been attempted with different success rates. Because the low-density lipoprotein-receptor (LDLR) is the receptor of vesicular stomatitis virus (VSV) and is expressed only at low levels on NK cells, we tested the potential of 5 statins and 5 non-statin compounds to increase the LDLR expression, thereby facilitating viral transduction. We found that the transduction efficiency of VSV-G pseudotyped lentivirus is augmented by statins that induced higher LDLR expression. In both NK-92 cells and primary NK cells, the transduction efficiency increased after treatment with statins. Furthermore, statins have been reported to suppress NK cell cytotoxicity; however, we showed that this can be completely reversed by adding geranylgeranyl-pyrophosphate (GGPP). Among the statins tested, we found that the combination of rosuvastatin with GGPP most potently improved viral transduction without affecting the cytotoxic properties of the NK cells. Display omitted Natural killer (NK) cells are known to be difficult to transduce, and various methods have been attempted with different success rates. Gong and colleagues found that the combination of rosuvastatin with GGPP most potently improved VSV-G lentivirus transduction via upregulating cell surface LDLR without affecting the cytotoxic properties of the NK cells.
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