miR-335-3p通过抑制Thrombospondin 1减弱了转化生长因子β1诱导的纤维化
Dong-Hee Han1, Min Kyoung Shin1, Jung-Suk Sung1
1Department of Life Science, Biomedi Campus, Dongguk University-Seoul, Goyang-si, Gyeonggi-do, Korea.
PloS one
|October 7, 2024
概括
这项研究表明,转化生长因子β1 (TGF-β1) 降低miR-335-3p,增加血栓蛋白1 (THBS1) 和恶化肺纤维化. 恢复miR-335-3p可以缓解纤维化标志物.
科学领域:
- 肺部医学 肺部医学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 肺纤维化涉及过度的细胞外基质 (ECM) 积累,导致慢性,致命的肺功能障碍.
- 转化生长因子-β1 (TGF-β1) 通过表皮-介质酶过渡加速ECM的产生,从而驱动纤维化.
- 目前的治疗方法有限,需要对潜在机制进行研究.
研究的目的:
- 研究TGF-β1诱导的肺纤维化中微RNA (miRNA) 和点基因之间的相互作用.
- 确定参与肺纤维化发展和进展的特定分子途径.
主要方法:
- 在呼吸道上皮细胞中构建了一个TGF-β1诱导的肺纤维化模型.
- 进行了转录组分析,以确定差异表达的mRNA和miRNA.
- 利用生物信息学进行蛋白质-蛋白质相互作用分析,并确定了关键基因.
- 进行miRNA模仿和抑制器转染,以验证基因相互作用和功能影响.
主要成果:
- 一个TGF-β1激活剂的Thrombospondin 1 (THBS1) 被显著上调,并被确定为蛋白质相互作用中的核心基因.
- 在TGF-β1治疗后,miR-335-3p表达减少,THBS1被确定为其直接点.
- 抑制TGF-β1-THBS1相互作用抑制了下游信号传递和缓解纤维化.
- miR-335-3p模仿转感染降低了THBS1和纤维化标志物的调控,而抑制转感染则显示出相反的效果.
结论:
- 暴露于TGF-β1会降低miR-335-3p的表达,从而导致THBS1的上调和肺纤维化恶化.
- miR-335-3p/THBS1轴是TGF-β1诱导的肺纤维化中的关键调解器.
- 这项研究表明,治疗肺纤维化有新的治疗点和机制.
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