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Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 J+Immunol 2016 ; 196 (5): 2195-204 Nephropedia Template TP
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Essential role for survivin in the proliferative expansion of progenitor and mature B cells1 #MMPMID26810226
J Immunol 2016[Mar]; 196 (5): 2195-204 PMID26810226show ga
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 (B-NHL). In addition to its role in inhibition of apoptosis, survivin also regulates mitosis. Here, 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, support the validity of survivin as an attractive therapeutic target for high-grade B-NHL.