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帕特诺利德通过阻断Smad2/3化通过Smad为受体激活来缓解腹膜纤维化

Ying Zhang¹, Zebin Wang¹, Liu Li²

¹Department of Nephrology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.

FASEB journal : official publication of the Federation of American Societies for Experimental Biology

|January 17, 2026

概括

帕瑟诺利德 (PTL) 通过准Smad对受体激活 (SARA) 来缓解腹纤维化. PTL 破坏了 SARA-Smad3 相互作用,改善了半体-半体过渡,并在腹腔透析并发症中恢复了 SARA 表达.

科学领域:

腎臟病學 (nephrology) 是一種醫學專業.
细胞生物学细胞生物学
分子生物学分子生物学

背景情况:

渐进性腹膜纤维化是腹膜透析 (PD) 的严重并发症.
转化生长因子 (TGF) -β/Smad通路与纤维化有关.
在PD相关纤维化中,Smad对受体激活 (SARA) 的作用尚不清楚.

研究的目的:

为了阐明SARA在PD相关的腹膜纤维化中的作用.
为了研究帕氏化物 (PTL) 和SARA之间的关系.
确定PTL缓解腹纤维化的机制.

主要方法:

单细胞测序 (scRNA-seq) 数据分析.
收集和分析长期停留PD液体样本.
建立了PD小鼠模型,TGF-β1诱导的半体-半体过渡 (MMT) 模型,以及CRISPR/Cas9工程SARA基因 (ZFYVE9) 淘汰细胞系.
在体外和体外共免疫沉实验,分子对接和PTL-生物素拉下测试.

主要成果:

SARA激活Smad2/3,Smad3促进SARA降解,导致纤维化进展期间SARA表达减少.
在不影响SARA蛋白稳定性的情况下,PTL抑制了SARA-Smad3相互作用.
在Smad3结合接口 (Pro788和Ser795残留物) 上,PTL直接与SARA结合.

结论:

通过酸化Smad2/3.3,SARA促进与PD相关的腹纤维化.
通过与SARA (ZFYVE9) 特别结合并破坏SARA-Smad3相互作用,PTL可以缓解腹膜纤维化.
这种机制恢复了SARA的表达,改善了MMT,并为腹膜纤维化临床治疗提供了理论基础.

关键词:

用于受体激活的smad.这真是太疯狂了帕瑟诺利德 (parthenolide) 是一种有机物.腹膜透析是指腹膜透析.腹膜纤维化腹膜纤维化

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