MKL-1 is a coactivator for STAT5b, the regulator of Treg cell development and function
MKL-1 is a coactivator for STAT5b, the regulator of Treg cell development and function
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MKL-1 是 STAT5b 的共激活剂,STAT5b 是 Treg 细胞发育和功能的调节因子
DOI:
10.1186/s12964-020-00574-1
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发表时间:
2020-07
影响因子:
8.4
通讯作者:
Xing Hua Liao
中科院分区:
文献类型:
--
作者:
Yuan Xiang;Jun Wang;Jia Peng Li;Wei Guo;Feng Huang;Hui Min Zhang;Han Han Li;Zhou Tong Dai;Zi Jian Zhang;Hui Li;Le Yuan Bao;Chao Jiang Gu;Kun Chen;Tong Cun Zhang;Xing Hua Liao
BackgroundFoxp3+CD4+regulatory T cells (Treg) constitutes a key event in autoimmune diseases. STAT5b is the critical link between the IL-2/15 and FOXP3, the master regulator of Treg cells.MethodsThe CD3+T cell and Foxp3+CD4+regulatory T cells were overexpressioned or knockdown MKL-1 and STAT5a and tested for Treg cell development and function. Direct interaction of MKL-1 and STAT5a were analyzed by coimmunoprecipitation assays, Luciferase assay, Immunofluoresence Staining and Yeast two-hybrid screening. The effect of MKL-1 and STAT5a on the Treg genes expression was analyzed by qPCR and western blotting and Flow cytometry.ResultsHowever, the molecular mechanisms mediating STAT5b-dependent Treg genes expression and Treg cell phenotype and function in autoimmune diseases are not well defined. Here, we report that the MKL-1 is a coactivator for the major Treg genes transcription factor STAT5b, which is required for human Treg cell phenotype and function. The N terminus of STAT5b, which contains a basic coiled-coil protein–protein interaction domain, binds the C-terminal activation domain of MKL-1 and enhances MKL-1 mediated transcriptional activation of Treg-specific, CArG containing promoters, including the Treg-specific genes Foxp3. Suppression of endogenous STAT5b expression by specific small interfering RNA attenuates MKL-1 transcriptional activation in cultured human cells. The STAT5b–MKL-1 interaction identifies a role of Treg-specific gene regulation and regulated mouse Treg cell development and function and suggests a possible mechanism for the protective effects of autoimmune disease Idiopathic Thrombocytopenic Purpura (ITP).ConclusionsOur studies demonstrate for the first time that MKL-1 is a coactivator for STAT5b, the regulator of Treg cell development and function.Video abstract
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影响因子:
5.3
作者:
通讯作者:
--
影响因子:
4.4
作者:
Burchill, Matthew A.;Yang, Jianying;Farrar, Michael A.
通讯作者:
Farrar, Michael A.
影响因子:
4.3
作者:
Brandt, Dominique T.;Xu, Jianming;Grosse, Robert
通讯作者:
Grosse, Robert
影响因子:
5.4
作者:
Liao, Xing-Hua;Lu, Da-Lin;Zhang, Tong-Cun
通讯作者:
Zhang, Tong-Cun
DOI:
10.1073/pnas.94.14.7239
发表时间:
1997-07-08
影响因子:
11.1
作者:
Udy, GB;Towers, RP;Davey, HW
通讯作者:
Davey, HW