一种预防微塑性毒性的益生菌:Clostridium dalinum通过微生物群-代谢-屏障相互作用减轻微塑性诱导的损伤
Li Zheng-Qiang1,2, Li Jun1,2, An Rui1,2
1Institute of Natural Antioxidants and Anti-Inflammation, Dali University, Dali, 671003, China.
Current research in food science
|October 1, 2025
概括
在小鼠中,Clostridium dalinum有效地预防和恢复微塑料暴露的肠道损伤. 这种益生菌通过改善肠道屏障功能和减少炎症来起作用,提供了一种针对微塑料毒性的新型防御策略.
科学领域:
- 环境健康 环境健康
- 微生物学 微生物学
- 毒理学 毒理学 毒理学
背景情况:
- 微塑料 (MP) 是普遍存在的环境污染物,导致人类不可避免的摄入和潜在的健康风险.
- 制定策略以减轻或逆转MP诱导的毒性是一个关键的公共卫生问题.
- 聚烯微塑料 (PS-MPs) 是一种常见的MP类型,它们对肠道微生物群和宿主健康的影响需要彻底调查.
研究的目的:
- 在小鼠模型中研究益生菌Clostridium dalinum对PS-MPs诱导的肠损伤的预保护和恢复作用.
- 阐明C. dalinum发挥其保护和恢复作用的潜在分子和微生物机制.
- 探索参与C. dalinum对MP毒性的防御的协同"微生物群-代谢-屏障"途径.
主要方法:
- 利用元基因组学和代谢学来全面分析PS-MP和C. dalinum干预的影响.
- 通过测量肠道长度,屏障蛋白含量 (ZO-1,Occludin) 和炎症水平来评估肠道损伤.
- 研究的机制性途径包括TLR4/NF-κB信号传递,PPARγ/GPR43,ABC载体和肠道微生物组成.
主要成果:
- 暴露于PS-MPs引起了显著的肠损伤,以减少长度,降低屏障蛋白含量和升高的炎症为证.
- 预防性和恢复性摄入C. dalinum显著改善了PS-MPs引起的损伤,恢复了肠道的长度和屏障功能,同时减少了炎症.
- C. dalinum的作用通过上调屏障蛋白来调节,抑制TLR4/NF-κB通路,并调节特定的代谢和微生物通路.
结论:
- Clostridium dalinum在预防和恢复受聚烯微塑料暴露引起的肠道损伤方面表现出显著的有效性.
- 保护和恢复作用与肠道微生物群的调节,宿主新陈代谢和肠道屏障完整性有关.
- 这项研究提供了首个证据,证明C. dalinum作为一种基于益生菌的策略,可以对抗微塑性毒性,揭示了新的治疗机制.
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