在心脏肌细胞中,gp130的激活会通过STAT3传递超信号
1Department of Medicine III, Osaka University Medical School, Suita, Japan.
Circulation
|August 26, 1998
概括
在gp130的下游,STAT3通路促进心脏肌细胞缩. 这项研究调查了STAT3的研究.
科学领域:
- 心血管生物学 心血管生物学
- 分子细胞生物学 分子细胞生物学
- 信号传输 信号传输
背景情况:
- gp130是IL-6相关细胞因子的关键信号传感器,存在于心脏肌细胞中.
- 心脏肌细胞中的gp130激活与心肌缩有关.
- 有两个主要的下游途径:JAK/STAT和MAPK.
研究的目的:
- 研究Janus激酶/信号转换器和转录激活器 (JAK/STAT) 途径,特别是STAT3,在gp130依赖心肌细胞缩中的关键作用.
- 阐明STAT3在响应白血病抑制因子 (LIF) 的高缩信号中介作用.
主要方法:
- 使用腺病毒载体将野生型 (AD/WT) 或突变型 (AD/DN) STAT3cDNA转移到培养的小鼠心肌细胞中.
- 用白血病抑制因子 (LIF) 刺激细胞.
- 测量了c-fos和心房性尿素因子 (ANF) mRNAs的表达和蛋白质合成 ([3H]白蛋白结合);MAPK活性也被评估.
主要成果:
- STAT3激活显著增加了c-fos和ANFmRNA和蛋白质合成的诱导.
- 抑制STAT3减弱的LIF诱导的c-fos和ANFmRNA表达和蛋白质合成.
- 两组之间没有观察到MAPK活性的显著差异,这表明STAT3.3具有特定的作用.
结论:
- 在gp130下游的STAT3依赖信号通路在促进心脏肌细胞缩方面发挥着关键作用.
- 这一途径由白血病抑制因子 (LIF) 激活,并有助于心脏重塑.
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