肌肉相关的转录因子在多囊性病中调解上皮纤维化
Zsuzsanna Lichner1, Mei Ding1, Tarang Khare1,2
1Keenan Research Centre for Biomedical Science, St. Michael's Hospital, Toronto, ON M5B 1T8, Canada.
Cells
|June 19, 2024
概括
多囊病 (PKD) 涉及囊形成和纤维化. 失去了多素1/2激活了RhoA/细胞骨/肌肉相关转录因子 (MRTF) 途径,导致PKD中的上皮纤维化.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 多囊性病 (PKD) 标志着囊的发展和纤维化.
- 将多素1/2 (PC1/2) 功能障碍与纤维化联系起来的分子途径尚不清楚.
- 该RhoA通路与囊发生有关,这表明它可能在纤维化中发挥作用.
研究的目的:
- 研究肌肉相关转录因子 (MRTF) 在PC1/2损失诱导的皮质纤维化在PKD中的作用.
- 确定MRTF激活是否是PC1/2损失的结果,并有助于PKD病原体.
主要方法:
- 在体外中通过siRNA介导的PC1/2的淘汰.
- 对RhoA激活,细胞骨重塑和MRTF核转位/过度表达的分析.
- 使用PKD小鼠模型 (PKD1和PKD2) 的体内研究.
- 基因表达分析以确定依赖MRTF的基因.
主要成果:
- 在体外PC1/2损失激活了RhoA,诱导了细胞骨变化,并导致MRTF核转位和过度表达.
- 在PKD小鼠模型的上皮细胞中观察到类似的MRTF激活.
- 通过PC1/2下调调节上调调的大量基因是MRTF依赖的.
- 表皮MRTF对于纤维细胞激活至关重要,促进纤维化.
结论:
- 在PKD中,MRTF是表皮纤维化的一个关键媒介,在PC1/2损失的下游被激活.
- 罗亚/细胞骨/MRTF通路是PC1/2功能障碍和上皮纤维化之间的关键联系.
- 在PKD中,RhoA可能是PKD中囊发生和纤维化的常见上游调节者.
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