PPARγ通过调节脂质新陈代谢和铁化来缓解孕前的发展
Weisi Lai1, Ling Yu1, Yali Deng2
1Department of Obstetrics and Gynecology, Second XiangYa Hospital of Central South University, Changsha, China.
Communications biology
|April 9, 2024
概括
过氧体增殖器激活受体玛 (PPARγ) 信号影响子宫前 (PE) 通过调节铁. 激活PPARγ可以通过脂质氧化和降低铁亡来缓解PE的发展.
科学领域:
- 产科和妇科 产科和妇科
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 孕前 (PE) 是一种妊娠并发症,其特征是高血压和器官损伤.
- 铁,一种调节细胞死亡的形式,以及氧酶增殖器激活受体玛 (PPARγ) 信号传递与PE的病原发生有关.
- 在PE患者中观察到PPARγ和核因素红色素2相关因子2 (Nrf2) 的失调.
研究的目的:
- 调查PPARγ信号在铁亡中的作用及其对孕前发展的贡献.
- 探索PPARγ激动剂在缓解PE相关的胎盘功能障碍方面的治疗潜力.
主要方法:
- 从健康个人和PE患者收集血清和胎盘组织.
- 利用细胞培养模型与缺氧和埃拉斯来诱导 trofhoblasts 的ferroptosis.
- 使用罗西格利塔 (一种PPARγ激动剂) 和si-Nrf2来评估对细胞活力,增殖,迁移,入侵和脂质代谢的影响.
- 评估了铁亡标记物,脂质合成 (SREBP1) 和脂质氧化.
主要成果:
- 在PE胎盘中,PPARγ和Nrf2水平下降.
- 罗西格利塔治疗通过调节Nrf2和SREBP1.1,逆转了缺氧诱导的热囊细胞铁和降低了脂质合成.
- 与单独的缺氧相比,罗西格利塔和ferr1治疗增强了热囊细胞的迁移和入侵.
- si-Nrf2治疗减弱了罗西格利塔对热囊细胞增殖,迁移和入侵的作用,但没有减弱SREBP1的表达.
- 在PE大鼠模型中,PPARγ激动剂减轻了胎盘铁亡.
- PPARγ/Nrf2信号通过脂质氧化影响铁,而不是通过SREBP1介导的脂质合成.
结论:
- 在孕前症中,PPARγ信号传递和铁位异常调节.
- PPARγ的激活通过调节脂质氧化和铁化来缓解PE的发展.
- PPARγ代表了孕前的潜在治疗标.
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