在小鼠中因次慢性暴露于聚烯微塑料而引起的肝脏和代谢结果
Sheng-Han Lee1, Ting-An Lin2, Yuan-Horng Yan3,4
1School of Medicine, College of Medicine, National Sun Yat-Sen University, Kaohsiung, Taiwan.
Archives of toxicology
|August 25, 2024
概括
微微塑料积聚在老鼠肝脏中,导致氧化应激和代谢功能障碍. 较大的微塑料显示出较少的不良影响,表明依赖于大小的肝毒性.
科学领域:
- 环境科学 环境科学
- 毒理学 毒理学 毒理学
- 肝病学 肝病学是一种肝病学.
背景情况:
- 微塑料 (MP) 是全球分布的环境污染物.
- 以前的研究表明MP诱导的肝毒性,但缺乏系统的调查.
研究的目的:
- 研究不同尺寸的微塑料对小鼠肝脏的次慢性影响.
- 评估MP积累,氧化应激,炎症和肝脏的病理变化.
主要方法:
- 雌性C57BL/6小鼠在12周内每周两次口服尼罗河红色标记的聚乙烯 (PS) 微塑料 (0.5微米和5微米) 或载体.
- 肝脏积累,氧化应激标志物,炎症性细胞因子,血清生物化学和肝脏病理被分析暴露后.
主要成果:
- 在小鼠肝脏中积累的亚微米 (0.5微米) PS-MPs,与微米 (5微米) PS-MPs不同.
- 0.5微米的PS-MP暴露增加了肝脏葡萄糖,甘油三,ALT,AST,氧化应激,IL-6和脂质滴.
- 5微米的PS-MP暴露显示出较少的副作用,包括增加肝脏体重指数,葡萄糖,HDL,AST,以及降低HNE-MA.
结论:
- 亚微米MPs的亚慢性暴露会导致肝脏沉积,氧化应激,炎症和破坏葡萄糖/脂质平衡.
- 这些影响表明可能存在严重的代谢功能障碍或非酒精性脂肪肝炎类肝毒性.
- 微塑料的大小是决定肝脏毒性和积累的关键因素.
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