MicroRNA-146a regulates ICOS-ICOSL signalling to limit accumulation of T follicular helper cells and germinal centres.
MicroRNA-146a regulates ICOS-ICOSL signalling to limit accumulation of T follicular helper cells and germinal centres.
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DOI:
10.1038/ncomms7436
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发表时间:
2015-03-06
影响因子:
16.6
通讯作者:
Vinuesa, Carola G.
中科院分区:
文献类型:
--
作者:
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 G.
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 messenger RNAs, and of these, ICOS is the most strongly cell autonomously upregulated target in miR-146a-deficient T cells. In addition, miR-146a deficiency leads to increased ICOSL expression on GC B cells and antigen-presenting cells. Partial blockade of ICOS signalling, either by injections of low dose of ICOSL blocking antibody or by halving the gene dose of Icos in miR-146a-deficient T cells, prevents the Tfh and GC B-cell accumulation. Collectively, miR-146a emerges as a post-transcriptional brake to limit Tfh cells and GC responses. Maturation of antibody-producing B cells in germinal centers is orchestrated by T follicular helper cells. Here Pratama et al. show that miR-146a negatively regulates T follicular helper cells by targeting ICOS-ICOS ligand signaling in germinal centers.
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DOI:
10.1038/nrrheum.2012.58
发表时间:
2012-05-01
期刊:
Nature reviews. Rheumatology
影响因子:
--
作者:
通讯作者:
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影响因子:
30.5
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影响因子:
32.4
作者:
Choi YS;Kageyama R;Eto D;Escobar TC;Johnston RJ;Monticelli L;Lao C;Crotty S
通讯作者:
Crotty S
影响因子:
30.5
作者:
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影响因子:
64.8
作者:
Dong, C;Juedes, AE;Flavell, RA
通讯作者:
Flavell, RA