在缺血性中风中,p23 保护大脑微血管内皮细胞免受铁灭的作用
Yao Zhao1, Yunfei Xu1, Qing Xu1
1Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China.
International journal of molecular medicine
|February 21, 2025
概括
蛋白质p23通过抑制细胞死亡的一种类型铁亡来保护大脑免受损伤. 它增强了谷氨过氧化酶4 (GPX4) 的稳定性,这是一个关键调节剂,为缺血性中风提供了潜在的治疗点.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 铁亡是依赖铁的调节细胞死亡,与其他细胞死亡类型不同.
- p23 是一个共同的辅助蛋白质,对铁亡的作用大致未知.
- 大脑缺血/反 (I/R) 损伤 (CIRI) 影响血脑屏障 (BBB) 和大脑微血管内皮细胞 (BMEC) 的铁亡.
研究的目的:
- 调查p23对CIRI诱导的BBB功能障碍和BMECs中的ferroptosis的影响.
- 阐明谷氨过氧化酶4 (GPX4) 在p23对铁亡的调节中的作用.
- 确定p23是否为缺血性中风提供潜在的治疗点.
主要方法:
- 研究了CIRI和氧气-葡萄糖剥夺/再氧化对BMEC中BBB,铁和p23表达的作用.
- 评估了p23对CIRI诱导的BBB功能障碍和BMEC铁的影响.
- 使用分子对接,共免疫沉和GPX4条件淘汰小鼠模型研究GPX4的作用.
主要成果:
- 通过抑制 BMEC 中的铁化,p23 保护了 CIRI 诱导的 BBB 损伤.
- p23促进了GPX4的表达,并通过与其N端域结合来增强其稳定性,从而抑制降解.
- 在GPX4条件淘汰赛小鼠中,p23对BBB的保护作用减弱了.
结论:
- 通过抑制铁亡,p23对脑I/R诱导的BBB损伤起着保护作用.
- p23增强了GPX4的稳定性,这表明其神经保护作用的机制.
- p23代表了缺血性中风治疗的潜在治疗标.
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