外体miRNAs作为六价诱导的基因毒性和免疫毒性的参与者:一个两阶段的人口研究
Shiyi Hong1, Zekang Su1, Yali Zhang1
1Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100083, China.
Environmental science & technology
|November 20, 2024
概括
六价 (Cr(VI)) 暴露会改变循环外体miRNAs,这与遗传损伤和免疫抑制生物标志物相关. 特定的miRNAs可以精确地识别遗传损伤,提供对重金属毒性途径的见解.
科学领域:
- 环境健康 环境健康
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 毒理学 毒理学 毒理学
背景情况:
- 六价 (Cr(VI)) 是一种已知的致癌物质,具有基因毒性和免疫抑制性.
- 外体微RNAs (miRNAs) 通过基因调节和免疫调节与癌症和重金属毒性有关.
研究的目的:
- 在暴露于Cr(VI) 的个体中研究循环外体miRNAs的扰乱.
- 探索外体miRNA与遗传损伤和免疫反应的生物标志物之间的相关性.
- 为了确定能够预测遗传损伤水平的特定外体miRNAs.
主要方法:
- 两阶段流行病学研究设计.
- 对循环中的外体miRNAs的分析.
- 测量遗传损伤生物标志物 (γ-H2AX,8-OHdG) 和免疫标志物 (PD-1).
- 支持向量机和贝叶斯调解模型的应用.
主要成果:
- 暴露于Cr(VI) 显著改变了外体miRNA配置文件.
- 特定的外体miRNAs (miR-4467,miR-345-5p,miR-144-3p,miR-206) 准确地确定了遗传损伤.
- miR-4467调解了Cr (VI) 暴露和尿路8-OHdG增加之间的关系.
- 与免疫抑制生物标志物的相关性在外部队列中显示出有限的验证.
结论:
- 循环的外体miRNAs是CrVI诱导的遗传损伤的敏感指标.
- 外体miRNAs在Cr (VI) 毒性的表观遗传编排中发挥作用.
- 这些发现为重金属毒理途径和潜在生物标志物提供了新的见解.
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