Essential Role for Survivin in the Proliferative Expansion of Progenitor and Mature B Cells.

Ana V Miletic, Julia Jellusova, Matthew H Cato, Charlotte R Lee, Gisele V Baracho, Edward M Conway, Robert C Rickert

Journal of immunology (Baltimore, Md. : 1950) 2016 Mar 1

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Survivin is a member of the inhibitor of apoptosis family of proteins and a biomarker of poor prognosis in aggressive B cell non-Hodgkin's lymphoma. In addition to its role in inhibition of apoptosis, survivin also regulates mitosis. In this article, we show that deletion of survivin during early B cell development results in a complete block at the cycling pre-B stage. In the periphery, B cell homeostasis is not affected, but survivin-deficient B cells are unable to mount humoral responses. Correspondingly, we show that survivin is required for cell division in response to mitogenic stimulation. Thus, survivin is essential for proliferation of B cell progenitors and activated mature B cells, but is dispensable for B cell survival. Moreover, a small-molecule inhibitor of survivin strongly impaired the growth of representative B lymphoma lines in vitro, supporting the validity of survivin as an attractive therapeutic target for high-grade B cell non-Hodgkin's lymphoma. Copyright © 2016 by The American Association of Immunologists, Inc.

Citation

Ana V Miletic, Julia Jellusova, Matthew H Cato, Charlotte R Lee, Gisele V Baracho, Edward M Conway, Robert C Rickert. Essential Role for Survivin in the Proliferative Expansion of Progenitor and Mature B Cells. Journal of immunology (Baltimore, Md. : 1950). 2016 Mar 1;196(5):2195-204