Loss of SOCS3 in T helper cells resulted in reduced immune responses and hyperproduction of interleukin 10 and transforming growth factor-beta 1.

Loss of SOCS3 in T helper cells resulted in reduced immune responses and hyperproduction of interleukin 10 and transforming growth factor-beta 1.
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T辅助细胞中SOCS3的丧失导致免疫反应降低,白介素10并转化生长因子-Beta 1。

DOI:
10.1084/jem.20052333
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发表时间:
2006-04-17
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Yoshimura A
Yoshimura A
中科院分区:
其他
文献类型:
--
作者:
Kinjyo I;Inoue H;Hamano S;Fukuyama S;Yoshimura T;Koga K;Takaki H;Himeno K;Takaesu G;Kobayashi T;Yoshimura A

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细胞因子信号转导抑制因子(SOCS)3是信号转导和转录激活因子(STAT)3激活细胞因子的主要负反馈调节因子。转基因小鼠研究表明,T细胞中高水平的SOCS 3导致2型T辅助细胞(Th 2)偏斜并导致对过敏性疾病的超敏反应。为了确定SOCS 3在T细胞中的生理作用,我们产生了T细胞特异性SOCS 3条件性敲除小鼠。我们发现,T细胞中缺乏SOCS 3的小鼠不仅对卵清蛋白诱导的气道高反应性表现出免疫应答降低,而且对利什曼原虫感染也表现出免疫应答降低。在体外,SOCS 3缺陷型CD 4 + T细胞比对照T细胞产生更多的转化生长因子(TGF)-β1和白细胞介素(IL)-10,但IL-4较少,表明优先Th 3样分化。我们发现,STAT 3正调控TGF-β1启动子活性依赖于潜在的STAT 3结合位点。此外,染色质免疫沉淀分析显示,与对照T细胞相比,SOCS 3缺陷型T细胞中更多的STAT 3被募集到TGF-β1启动子。活化的STAT 3增强T细胞中TGF-β1和IL-10的表达,而显性负性形式的STAT 3抑制这些表达。根据这些发现,我们提出SOCS 3通过调节STAT 3的活化来调节免疫调节细胞因子TGF-β1和IL-10的产生。
Suppressor of cytokine signaling (SOCS)3 is a major negative feedback regulator of signal transducer and activator of transcription (STAT)3-activating cytokines. Transgenic mouse studies indicate that high levels of SOCS3 in T cells result in type 2 T helper cell (Th2) skewing and lead to hypersensitivity to allergic diseases. To define the physiological roles of SOCS3 in T cells, we generated T cell–specific SOCS3 conditional knockout mice. We found that the mice lacking SOCS3 in T cells showed reduced immune responses not only to ovalbumin-induced airway hyperresponsiveness but also to Leishmania major infection. In vitro, SOCS3-deficient CD4+ T cells produced more transforming growth factor (TGF)-β1 and interleukin (IL)-10, but less IL-4 than control T cells, suggesting preferential Th3-like differentiation. We found that STAT3 positively regulates TGF-β1 promoter activity depending on the potential STAT3 binding sites. Furthermore, chromatin immunoprecipitation assay revealed that more STAT3 was recruited to the TGF-β1 promoter in SOCS3-deficient T cells than in control T cells. The activated STAT3 enhanced TGF-β1 and IL-10 expression in T cells, whereas the dominant-negative form of STAT3 suppressed these. From these findings, we propose that SOCS3 regulates the production of the immunoregulatory cytokines TGF-β1 and IL-10 through modulating STAT3 activation.
SPRSED-1负调节过敏原诱导的气道嗜酸性粒细胞和反应性过高。
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发表时间: 2005-01-03
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Inoue, H;Kato, R;Fukuyama, S;Nonami, A;Taniguchi, KI;Matsunmoto, K;Nakano, T;Tsuda, M;Matsumura, M;Kubo, M;Ishikawa, F;Moon, BG;Takatsu, K;Nakanishi, Y;Yoshimura, A
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