MicroRNA-146a regulates ICOS–ICOSL signalling to limit accumulation of T follicular helper cells and germinal centres
Pratama, Alvin; Srivastava, Monika; Williams, Naomi J.; Papa, Ilenia; Lee, Sau K.; Dinh, Xuyen T.; Hutloff, Andreas; Jordan, Margaret A.; Zhao, Jimmy L.; Casellas, Rafael; Athanasopoulos, Vicki; Vinuesa, Carola
Tight control of T follicular helper (Tfh) cells is required for optimal maturation of the germinal centre (GC) response. The molecular mechanisms controlling Tfh-cell differentiation remain incompletely understood. Here we show that microRNA-146a (miR-146a) is highly expressed in Tfh cells and peak miR-146a expression marks the decline of the Tfh response after immunization. Loss of miR-146a causes cell-intrinsic accumulation of Tfh and GC B cells. MiR-146a represses several Tfh-cell-expressed...[Show more]
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