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Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Immunity 2016 ; 44 (4): 913-23 Nephropedia Template TP
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CD5 binds to Interleukin-6 and induces a feed-forward loop with the transcription factor STAT3 in B cells to promote cancer #MMPMID27096320
Zhang C; Xin H; Zhang W; Yazaki PJ; Zhang Z; Le K; Li W; Lee H; Kwak L; Forman S; Jove R; Yu H
Immunity 2016[Apr]; 44 (4): 913-23 PMID27096320show ga
The participation of a specific subset of B cells and how they are regulated in cancer is unclear. Here, we demonstrate that the proportion of CD5+ relative to interleukin-6 receptor ? (IL-6R?) expressing B cells was greatly increased in tumors. CD5+ B cells responded to IL-6 in the absence of IL-6R?. IL-6 directly bound to CD5, leading to activation of the transcription factor STAT3 via gp130 and its downstream kinase JAK2. STAT3 upregulated CD5 expression, thereby forming a feed-forward loop in the B cells. In mouse tumor models, CD5+ but not CD5?B cells promoted tumor growth. CD5+ B cells also showed activation of STAT3 in multiple types of human tumor tissues. Thus, our findings demonstrate a critical role of CD5+ B cells in promoting cancer.