聚乙烯二甲 (PET) 微塑料通过激活p38-MAPK通路在小鼠中诱导雄性生殖毒性
Xin Zhang1, Tianyi Ma2, Jingran Sun2
1Baotou Teachers' College, School of Ecological Environment, Baotou 014000, China; Military Medical Sciences Academy, Academy of Military Sciences, Tianjin 300050, China.
Ecotoxicology and environmental safety
|July 31, 2025
概括
聚乙烯四甲酸微塑料 (PET-MPs) 在雄性小鼠的丸中积累,损害精子质量和激素水平. 暴露于PET-MP会引发炎症和细胞死亡,影响男性生殖健康.
科学领域:
- 环境科学 环境科学
- 毒理学 毒理学 毒理学
- 生殖生物学 生殖生物学
背景情况:
- 微塑料是普遍存在的环境污染物,对人类的暴露越来越大.
- 聚乙烯四甲酸微塑料 (PET-MPs) 对哺乳动物生殖系统的特定影响的研究是有限的.
- 了解PET-MPs的生殖毒性机制对于公共卫生至关重要.
研究的目的:
- 调查PET-MPs对雄性小鼠生殖毒性的影响.
- 阐明PET-MP诱导的生殖损伤的潜在机制.
- 评估PET-MPs对丸组织,精子质量,激素水平和细胞通路的影响.
主要方法:
- 雄性小鼠通过连续测量暴露在不同大小的PET-MPs (50, 200, 1000 nm) 中,持续90天.
- 分析了丸组织积累,精子质量和激素水平.
- 使用血素和色素 (H&E) 染色进行了组织病理学检查.
- 免疫组织化学被用来评估细胞增殖和细胞亡.
- 转录组测序确定了激活的途径,随后对关键基因,蛋白质和炎症因素进行了分析.
主要成果:
- 发现PET-MPs在丸组织中积累.
- 暴露后,精子质量和男性激素水平显著下降.
- 组织病理学揭示了精子生成细胞的分离,无序的排列和真空化.
- 暴露于PET-MP抑制了精子生成细胞的增殖和增加了亡.
- 转录组分析表明MAPK通路的激活,炎症因子升高.
结论:
- 在雄性小鼠中,PET-MPs诱导生殖毒性.
- 该机制涉及丸积累,受损的精子生成,荷尔蒙失衡和通过MAPK通路的炎症.
- 这些发现强调了与PET-MP环境暴露相关的潜在生殖风险.
相关概念视频
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