GSK3 inhibition drives maturation of NK cells and enhances their antitumor activity

Frank M Cichocki, Bahram Valamehr, Ryan Bjordahl, Bin Zhang, Betsy Rezner, Paul Rogers, Svetlana Gaidarova, Stacey Moreno, Katie Tuininga, Phillip Dougherty, Valarie McCullar, Peter Howard, Dhifaf Sarhan, Emily Taras, Heinrich Schlums, Stewart Abbot, Daniel Shoemaker, Yenan T. Bryceson, Bruce R Blazar, Scott WolchkoSarah A Cooley, Jeffrey S Miller

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

Maturation of human natural killer (NK) cells as defined by accumulation of cell-surface expression of CD57 is associated with increased cytotoxic character and TNF and IFNg production upon target-cell recognition. Notably, multiple studies point to a unique role for CD57+ NK cells in cancer immunosurveillance, yet there is scant information about how they mature. In this study, we show that pharmacologic inhibition of GSK3 kinase in peripheral blood NK cells expanded ex vivo with IL15 greatly enhances CD57 upregulation and late-stage maturation. GSK3 inhibition elevated the expression of several transcription factors associated with late-stage NK-cell maturation including T-BET, ZEB2, and BLIMP-1 without affecting viability or proliferation. When exposed to human cancer cells, NK cell expanded ex vivo in the presence of a GSK3 inhibitor exhibited significantly higher production of TNF and IFNg, elevated natural cytotoxicity, and increased antibody-dependent cellular cytotoxicity. In an established mouse xenograft model of ovarian cancer, adoptive transfer of NK cells conditioned in the same way also displayed more robust and durable tumor control. Our findings show how GSK3 kinase inhibition can greatly enhance the mature character of NK cells most desired for effective cancer immunotherapy.

Original languageEnglish (US)
Pages (from-to)5664-5675
Number of pages12
JournalCancer Research
Volume77
Issue number20
DOIs
StatePublished - Oct 15 2017

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    Cichocki, F. M., Valamehr, B., Bjordahl, R., Zhang, B., Rezner, B., Rogers, P., Gaidarova, S., Moreno, S., Tuininga, K., Dougherty, P., McCullar, V., Howard, P., Sarhan, D., Taras, E., Schlums, H., Abbot, S., Shoemaker, D., Bryceson, Y. T., Blazar, B. R., ... Miller, J. S. (2017). GSK3 inhibition drives maturation of NK cells and enhances their antitumor activity. Cancer Research, 77(20), 5664-5675. https://doi.org/10.1158/0008-5472.CAN-17-0799