Posttranscriptional regulation of IL-23 expression by IFN-gamma through tristetraprolin.
Posttranscriptional regulation of IL-23 expression by IFN-gamma through tristetraprolin.
复制标题
IFN-gamma通过三烷酸蛋白对IL-23表达的转录后调节。
DOI:
10.4049/jimmunol.1002672
复制
发表时间:
2011-06-01
期刊:
影响因子:
--
通讯作者:
Liu J
中科院分区:
文献类型:
--
作者:
Qian X;Ning H;Zhang J;Hoft DF;Stumpo DJ;Blackshear PJ;Liu J
Interleukin-23 (IL-23) plays an essential role in maintenance of IL-17-producing T helper (Th17) cells that are involved in the pathogenesis of several autoimmune diseases. Regulation of Th17 cells is tightly controlled by multiple factors such as IL-27 and IFN-γ. However, the detailed mechanisms responsible for IFN-γ-mediated Th17 cell inhibition are still largely unknown. In this study, we demonstrate that IFN-γ differentially regulates IL-12 and IL-23 production in both dendritic cells and macrophages. IFN-γ suppresses IL-23 expression by selectively targeting p19 mRNA stability through its 3′untranslated region (3′UTR). Furthermore, IFN-γ enhances LPS-induced tristetraprolin (TTP) mRNA expression and protein production. Overexpression of TTP suppresses IL-23 p19 mRNA expression and p19 3′UTR-dependent luciferase activity. In addition, deletion of TTP completely abolishes IFN-γ-mediated p19 mRNA degradation. We further demonstrate that IFN-γ suppresses LPS-induced p38 phosphorylation and blockade of p38 MAPK signaling pathway with SB203580 inhibits IFN-γ and LPS induced p19 mRNA expression whereas overexpression of p38 increases p19 mRNA expression via reducing TTP binding to the p19 3′UTR. Finally, inhibition of p38 phosphorylation by IFN-γ leads to TTP dephosphorylation that could result in stronger binding of the TTP to the adenosine/uridine-rich elements in the p19 3′UTR and p19 mRNA degradation. In summary, our results reveal a direct link among TTP, IFN-γ and IL-23, indicating that IFN-γ-mediated Th17 cell suppression might act through TTP by increasing p19 mRNA degradation and therefore IL-23 inhibition.
登录
查看更多内容
影响因子:
20.3
作者:
Cocco, Claudia;Canale, Sara;Airoldi, Irma
通讯作者:
Airoldi, Irma
影响因子:
5.3
作者:
Lasa, M;Mahtani, KR;Clark, AR
通讯作者:
Clark, AR
影响因子:
2.1
作者:
Kim, H-R;Kim, H-S;Kim, H-Y
通讯作者:
Kim, H-Y
影响因子:
5.5
作者:
Liu, F.-L.;Chen, C.-H.;Chang, D.-M.
通讯作者:
Chang, D.-M.
影响因子:
15.3
作者:
Liu, JG;Cao, SJ;Herman, LM;Ma, XJ
通讯作者:
Ma, XJ