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外源S1P通过S1P受体2诱导CTGF通过Src-RhoA-ROCK-YAP通路在肝星细胞中的表达
Suhyun Park1, Jonghwa Kim2, Sera Yang3
1Department of Health Science and Technology, SAIHST, Sungkyunkwan University, 81 Irwon-Ro, Gangnam-Gu, Seoul, 06351, South Korea.
Molecular biology reports
|September 2, 2024
概括
斯芬哥辛1-酸盐 (S1P) 通过S1P受体2 (S1PR2) 激活肝星细胞 (HSC),促进肝纤维化. 准S1PR2-Hippo-YAP通路为肝纤维化提供了一个潜在的治疗策略.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 细胞生物学 细胞生物学
- 分子医学是分子医学.
背景情况:
- 肝纤维化是一种慢性肝病,其特征是细胞外基质沉积过多.
- 肝星细胞 (HSC) 是肝纤维化的关键参与者,由诸如斯芬戈-1-酸盐 (S1P) 等因素激活.
- 在HSC激活中S1P的精确作用和信号通路仍然不完全理解.
研究的目的:
- 为了研究S1P/S1P受体 (S1PR) 轴在HSC内的Hippo-YAP通路激活中的作用.
- 阐明S1P影响YAP激活和随后纤维化基因表达的分子机制.
主要方法:
- 在实验模型中利用了LX-2细胞系和初级HSC.
- 采用实时PCR,西部涂抹,药理抑制剂和siRNA介导的淘汰.
- 评估RhoA活动和细胞骨动态,以了解信号通路.
主要成果:
- 在HSC中,S1P显著上调了YAP目标基因,包括CTGF,COL1A1和α-SMA.
- 鉴定出S1P受体2 (S1PR2) 是S1P诱导CTGF表达的主要媒介.
- S1P-S1PR2信号抑制了Hippo激酶级联,通过Src-RhoA-ROCK通路和actin细胞骨调节激活YAP.
结论:
- 在S1P/S1PR2-Src-RhoA-ROCK信号轴激活Hippo-YAP途径在HSC.
- 这种激活导致纤维菌标记物 (CTGF,COL1A1,α-SMA) 的表达增加.
- S1PR2成为治疗肝纤维化的有前途的治疗标.
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