从环境颗粒物中分离的Cu-和Fe-对人类结肠CaCo-2细胞中的线粒体动力学的影响
Franco Cervellati1, Mascia Benedusi2, Alice Casoni2
1Department of Neuroscience and Rehabilitation, University of Ferrara, Ferrara, Italy. franco.cervellati@unife.it.
Biological trace element research
|December 31, 2024
概括
空气污染,特别是含铜和铁的颗粒物 (PM),会损害人类的肠道细胞. 这种暴露会破坏细胞结构,氧化还原平衡和线粒体功能,可能将污染与胃肠道疾病联系起来.
科学领域:
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
- 细胞生物学 细胞生物学
背景情况:
- 大气颗粒物 (PM) 是一种主要的人为空气污染物,具有已知的呼吸和心血管影响.
- 新出现的证据将空气污染暴露与胃肠道 (GI) 疾病 (如尾炎,结肠直肠癌和炎症性肠病) 联系起来.
- 炎症是肠道中PM毒性的假设机制.
研究的目的:
- 为了研究特定的氧化还原活性颗粒物成分,铜 (Cu) 和铁 (Fe) 对人类肠道细胞的影响.
- 分析PM暴露对细胞超结构,氧化还原稳态和线粒体标记物的影响.
- 探索PM暴露和胃肠道疾病之间的关系.
主要方法:
- 人体肠道细胞被暴露在Cu-和Fe-PM成分中,单独或组合.
- 评估了超结构完整性,氧还原稳态 (ROS水平) 和线粒体质量.
- 分析了线粒体动力学标记物的基因和蛋白质表达 (OPA1,Mitofusin1,PINK,Parkin).
- 测量了跨上皮抵抗以评估屏障功能.
主要成果:
- 暴露于Cu和Fe-PM诱导了内质网膜和线粒体的超结构损伤,结合时具有添加效应.
- 观察到活性氧物种 (ROS) 的增加和线粒体质量的减少,这表明线粒体是金属暴露的目标.
- 暴露于PM改变了线粒体动力学标志物的基因和蛋白质水平:OPA1增加,Mitofusin1与Fe减少,PINK由Fe调节,Parkin受到Cu的影响.
- 经皮质抗性显著下降,这表明肠道屏障功能受损.
结论:
- 特定的氧化还原活性PM成分 (Cu,Fe) 在人类肠道细胞中诱导细胞损伤和线粒体功能障碍.
- 暴露于颗粒物对肠道细胞完整性和屏障功能产生负面影响.
- 这些发现支持污染暴露与胃肠道疾病发病率增加之间的相关性.
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