从被人类肠道微生物群污染的土壤中解毒 (VI) 的新见解
Quan Qian1, Xiangyang Gui2, Wenfeng Huang1
1School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Environmental science & technology
|March 2, 2026
概括
肠道微生物通过将所摄入的土壤 (VI) (Cr) (VI)) 降解为肠道中不那么有害的 (III) (Cr) (III)) 进行排毒. 这种微生物作用为受污染的土壤中的重金属暴露提供了一个自然的排毒途径.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 毒理学 毒理学 毒理学
背景情况:
- 意外的土壤摄入是人类接触重金属如的主要途径.
- 在胃肠道内重金属的转化和排毒仍然不太清楚.
研究的目的:
- 为了研究在肠道阶段受污染的土壤中六价 (Cr(VI)) 的生物可访问性和转化.
- 确定驱动人体肠道中Cr (VI) 减少和排毒的微生物机制.
主要方法:
- 在高和低Cr污染的土壤中评估Cr (VI) 的生物可访问性和转化,跨肠道阶段.
- 利用微生物社区分析和功能基因分析.
- 采用部分最小平方路径建模 (PLS-PM) 来确定Cr (VI) 减少路径.
主要成果:
- 在小肠中,Cr6的生物可访问性为42% (高Cr土壤) 和64% (低Cr土壤).
- 从小到结肠阶段发生了显著的Cr (VI) 减少到Cr (III),由特定的肠道细菌驱动.
- 微生物的减少,特别是通过三酸循环和利博胺代谢,是主要的解毒途径,超过铁介导途径.
结论:
- 肠道微生物群在减少和解毒摄入的土壤Cr (VI) 中发挥着至关重要的作用.
- 肠道微生物活动将有毒的Cr6转化为不那么有害的Cr3,提供了对重金属暴露的自然防御机制.
- 这些发现为胃肠道中重金属排毒提供了洞察力.
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