通过PERK-eIF2α-ATF4-CREB3L1通路,C5a-C5aR1诱导了内等质网膜应激,以加速血管化
Aiting Liu1, Zhenwei Chen2, Xiaoxue Li1
1Department of Cardiology, Joint Laboratory of Guangdong-Hong Kong-Macao Universities for Nutritional Metabolism and Precise Prevention and Control of Major Chronic Diseases, The Eighth Affiliated Hospital of Sun Yat-sen University, Shennan Middle Rd, Shenzhen, 518000, China.
Cardiovascular research
|August 21, 2023
概括
高C5a水平通过激活C5a受体1 (C5aR1) 来增加血管化 (VC) 风险. 这触发了内等质网膜应激和PERK-eIF2α-ATF4-CREB3L1通路,促进了VSMC骨质性转基因分化. 准C5或C5aR1可以治疗VC.
科学领域:
- 心血管生物学 心血管生物学
- 分子医学是分子医学.
- 病理生理学 病理生理学
背景情况:
- 血管化 (VC) 是心血管发病率和死亡率的重要预测因素.
- 血管光滑肌细胞 (VSMCs) 的骨质转基因分化是VC中关键的病理机制.
- 在VC的基础上,精确的分子机制仍然不完全理解.
研究的目的:
- 研究C5a-C5aR1轴在血管化的作用和潜在机制.
- 在临床环境中探索C5a水平和VC之间的关联.
- 阐明参与C5a介导的VSMC骨质性转分的信号通路.
主要方法:
- 进行了一项横截面临床研究,以将C5a水平与VC相关联.
- 使用慢性病小鼠的体内研究和使用化VSMC的体内研究进行了体内研究.
- 评估了沉积,骨质生成标志物和PERK-eIF2α-ATF4-CREB3L1通路.
主要成果:
- 升高的C5a水平与增加风险显著相关.
- 服用C5a加速了VSMC骨质转基因的转基因分化,并增加了C5aR1的表达.
- 在体内和体外模型中,使用PMX 53抑制C5aR1降低了沉积和骨质变异.
- 激活C5a-C5aR1诱导了内等质网膜应激,激活了PERK-eIF2α-ATF4通路,这反过来又通过CREB3L1和COL1α1表达促进了VSMC骨质性转基因.
结论:
- 高C5a水平通过激活C5aR1促进VC,导致ER压力和PERK-eIF2α-ATF4-CREB3L1通路的激活.
- 这一途径驱动VSMC骨质性转基因分化,有助于血管化.
- 准C5或C5aR1通路是管理VC的潜在治疗策略.
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