高脂肪饮食诱导的脂质不良症驱动视网膜ECE-1和ET-1上调
Shuo Sun1, Huilan Zhang1, Jing Chen1
1Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China.
Frontiers in endocrinology
|September 15, 2025
概括
高脂肪饮食会导致代谢障碍和视网膜炎症. 增加的总胆固醇与视网膜内甲素转化酶-1 (ECE-1) 和内甲素-1 (ET-1) 的升高相关,这表明这些因素介导HFD诱导的视网膜血管功能障碍.
科学领域:
- 代谢障碍及其对眼睛健康的影响.
- 血管生物学和内皮功能障碍.
- 饮食诱导病理的分子机制.
背景情况:
- 高脂肪饮食 (HFD) 消费有助于代谢障碍,如肥胖和失脂症,具有已知的全身和眼部影响.
- 代谢障碍越来越多地与视网膜病理有关,但精确的机制尚未完全理解.
- 内分泌蛋白-1 (ET-1) 和内分泌蛋白转化酶-1 (ECE-1) 在血管功能障碍中至关重要,但它们在HFD诱导的视网膜变化中的作用需要阐明.
研究的目的:
- 为了研究将HFD诱导的代谢功能障碍与视网膜变化联系起来的分子机制.
- 为了评估炎症和血管因子的表达,包括ET-1和ECE-1,在养HFD的小鼠的视网膜中.
- 为了确定系统代谢变化和视网膜分子变化之间的相关性.
主要方法:
- 利用小鼠模型通过HFD诱导代谢功能障碍.
- 评估系统代谢参数:脂质样本,肝功能标志物和炎症性细胞因子.
- 使用qPCR量化了炎症和血管因素 (ET-1,ECE-1) 的视网膜基因表达,并进行了相关性分析.
主要成果:
- HFD养导致了显著的代谢障碍,包括体重增加,总胆固醇 (TC) 升高和肝脏压力.
- 视网膜分析显示,促炎性细胞因子 (IL-1β,IL-6,TNFβ1,TNFSF15) 的显著上调以及ECE-1和ET-1的表达增加.
- 在TC水平和视网膜ECE-1 (r=0.888,p=0.018) 和ET-1 (r=0.815,p=0.048) 之间发现了强烈的正相关性,表明脂质障碍和视网膜血管功能障碍之间存在联系.
结论:
- 由HFD引起的脂质不良症与视网膜炎症和内皮功能障碍有关.
- ECE-1和ET-1在HFD诱导的视网膜血管变化中起着关键的调解作用.
- 这些发现表明ECE-1和ET-1是预防代谢障碍相关视网膜并发症的潜在治疗点.
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