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首页> 外文期刊>Cytokine >Astrocyte differentiation of fetal neuroepithelial cells involving cardiotrophin-1-induced activation of STAT3.
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Astrocyte differentiation of fetal neuroepithelial cells involving cardiotrophin-1-induced activation of STAT3.

机译:胎儿神经上皮细胞的星形胶质细胞分化涉及心肌钙蛋白1诱导的STAT3激活。

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摘要

Cardiotrophin-1 (CT-1) belongs to the interleukin (IL-)6 family of cytokines that share membrane glycoprotein 130 (gp130) as a receptor component critical for signal transduction. We here observed that CT-1 was expressed in mouse fetal neuroepithelial cells, and was capable of inducing astrocyte differentiation from these cells in a synergistic manner with bone morphogenetic protein (BMP)-2, whose expression was also found in the fetal brain. CT-1-induced astrocyte differentiation was solely gp130-dependent. CT-1-stimulation led to promoter activation of the gene for an astrocyte marker, glial fibrillary acidic protein (GFAP), which was clearly inhibited by expression of a dominant negative form of a gp130-downstream transcription factor, signal transducer and activator of transcription 3(STAT3), or by introduction of a mutation in a single STAT3-binding site in the promoter, suggesting a critical role of STAT3 in the CT-1-induced GFAP transcription. These results suggest that astrocyte differentiation in the developing brain involves CT-1-signaling which cooperates with BMP2. Copyright 2001 Academic Press.
机译:心肌营养素1(CT-1)属于白细胞介素(IL-)6家族的细胞因子,它们共享膜糖蛋白130(gp130)作为对信号转导至关重要的受体成分。我们在这里观察到CT-1在小鼠胎儿神经上皮细胞中表达,并且能够与骨形态发生蛋白(BMP)-2协同作用诱导星形胶质细胞从这些细胞分化,该表达也在胎儿脑中发现。 CT-1诱导的星形胶质细胞分化完全取决于gp130。 CT-1刺激导致星形胶质细胞标记神经胶质纤维酸性蛋白(GFAP)基因的启动子激活,而该基因明显受到gp130下游转录因子,信号转导子和转录激活子的显性负性表达的抑制。 3(STAT3),或通过在启动子中的单个STAT3结合位点引入突变,提示STAT3在CT-1诱导的GFAP转录中起关键作用。这些结果表明,正在发育的大脑中星形胶质细胞的分化涉及与BMP2协同作用的CT-1信号传导。版权所有2001,学术出版社。

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