长期暴露于乙醇会通过胺积累和氧化应激诱导心脏纤维细胞转差
Tianyi Zhang1, Yile Qian1, Lingjie Mo1
1Department of Forensic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai, China.
Toxicology mechanisms and methods
|August 15, 2024
概括
慢性酒精使用通过增加心脏纤维细胞中的胺和氧化应激来促进心肌纤维化. 这会激活TGF-β-SMAD3信号,导致纤维化和心脏功能障碍.
科学领域:
- 心血管生物学 心血管生物学
- 细胞机制 细胞机制
- 毒理学 毒理学 毒理学
背景情况:
- 过度饮酒是心脏功能障碍的已知危险因素.
- 酒精诱导的心肌纤维化是导致心脏病的重要因素.
研究的目的:
- 研究乙醇对心肌纤维细胞的直接影响.
- 阐明慢性乙醇诱导心肌纤维化背后的机制.
主要方法:
- 初级大鼠心脏纤维细胞和C57BL/6J小鼠模型被用于体外和体内研究.
- 乙醇暴露是通过细胞培养和利伯-德卡利饮食进行的.
- 采用了组织学,分子生物学和分析化学技术.
主要成果:
- 长期暴露于乙醇增加了心肌纤维化和纤维细胞转分.
- 乙醇上调心脏纤维细胞中的胺生产,导致氧化应激.
- 抑制胺或TGF-β-SMAD3信号通路可以减少纤维化.
结论:
- 乙醇暴露会增加心脏纤维细胞中的胺和活性氧物种 (ROS).
- 这会触发TGF-β-SMAD3信号,促进纤维细胞转分和心肌纤维化.
- 针对这些途径为与酒精有关的心脏病提供了潜在的治疗策略.
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