Abstract:
: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 α (IL-6Rα)-expressing B cells was greatly increased in tumors. CD5(+) B cells responded to IL-6 in the absence of IL-6Rα. 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.
journal_name
Immunityjournal_title
Immunityauthors
Zhang C,Xin H,Zhang W,Yazaki PJ,Zhang Z,Le K,Li W,Lee H,Kwak L,Forman S,Jove R,Yu Hdoi
10.1016/j.immuni.2016.04.003subject
Has Abstractpub_date
2016-04-19 00:00:00pages
913-923issue
4eissn
1074-7613issn
1097-4180journal_volume
44pub_type
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