内皮CEPT1通过PPARα和VEGF-A信号促进血管生成.
Tariq J Khan1, Rodrigo Meade1, Santiago Elizondo-Benedetto1
1Division of Vascular Surgery, Department of Surgery (T.J.K., R.M., S.E.-B., L.B., O.S., B.A., M.S.Z., M.A.Z.), Washington University School of Medicine, St. Louis, MO.
Arteriosclerosis, thrombosis, and vascular biology
|November 20, 2025
概括
胆乙醇胺转化酶1 (CEPT1) 的过度表达增强了内皮细胞功能,并促进了糖尿病小鼠在缺血性损伤后的恢复. 这表明CEPT1在血管修复中起到补偿作用,特别是在与糖尿病相关的外周动脉疾病中.
科学领域:
- 血管生物学 血管生物学
- 代谢疾病 代谢疾病
- 血管生成的分子机制
背景情况:
- 胆乙醇胺转化酶1 (CEPT1) 对于脂合成至关重要,并受到糖尿病的影响.
- 对CEPT1的内皮细胞特异性淘汰会损害组织的恢复.
- 假设:CEPT1过度表达促进了后缺血性血管生成和糖尿病的恢复.
研究的目的:
- 研究CEPT1过度表达在促进糖尿病患者血管生成和恢复中的作用.
- 评估患有外周动脉疾病和糖尿病的患者外周动脉中CEPT1水平.
- 确定CEPT1在内皮细胞中影响的分子通路.
主要方法:
- 从患有外周动脉疾病和糖尿病的患者获得的人类外周动脉中评估CEPT1含量.
- 产生了一种特定于条件内皮细胞的CEPT1过度表达的小鼠模型 (Cept1fl/fl Cre+).
- 在小鼠中利用单边后肢缺血模型,随后进行单细胞RNA测序和对大动脉和内皮细胞的分子通路分析.
主要成果:
- 在患有外周动脉疾病和糖尿病的患者中,人类动脉内密显示CEPT1,ACOX1,VEGF R2,p-Akt和p-eNOS的升高.
- 单细胞RNA测序揭示了CEPT1-过度表达的EC中伤口愈合,血管生成,发芽和细胞迁移途径的丰富.
- 糖尿病Cept1fl/fl Cre+小鼠表现出改善的后肢输液和血管生成,增强了ex vivo毛细血管的发芽. 过度表达CEPT1增加了EC迁移,管状细胞形成和扩散,部分由PPARα,Akt和eNOS信号传递介导.
结论:
- 过度表达CEPT1可以增强内皮细胞功能和后缺血性恢复.
- CEPT1的亲血管效应包括Akt/eNOS信号和PPARα.
- 在患病的人类动脉中CEPT1升高表明在缺血损伤后血管修复中具有补偿作用,特别是在糖尿病中.
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