circZNF462通过调节染色质可访问性来抑制支气管上皮细胞中诱导的DNA损伤
Meizhen Li1, Qiuyi Lin1, Wei Chen1
1Institute for Chemical Carcinogenesis, Guangzhou Medical University, Guangzhou, 511436, China.
概括
循环RNAcircZNF462调节染色质的可访问性,抑制暴露导致的DNA损伤. 较低的circZNF462水平会增加DNA损伤,这表明它是环境遗传损伤的潜在生物标志物.
科学领域:
- 环境表观遗传学环境表观遗传学
- 分子毒理学 分子毒理学
- 癌症研究 癌症研究
背景情况:
- 遗传损伤是瘤发生和细胞功能改变的早期指标.
- 环境重金属诱导细胞毒性,突出显示环境-表观遗传学-遗传学相互作用.
- 循环RNAs (circRNAs) 在重金属诱导的DNA损伤中的作用仍然不清楚.
研究的目的:
- 研究circRNAcircZNF462调节 (Cd) 诱导的DNA损伤的机制.
- 探索circZNF462在染色质可访问性和DNA损伤中的作用.
- 确定circZNF462作为环境相关遗传损害的潜在生物标志物.
主要方法:
- 使用了一种10μMCd暴露的支气管上皮细胞模型.
- 分析了circRNA表达,染色体可访问性和DNA损伤标记物的变化.
- 研究了circZNF462,MCM5水平和染色质开放之间的相关性.
主要成果:
- 循环ZNF462的下调与Cd暴露后增加的DNA损伤和染色质可访问性有关.
- Cd暴露上调了MCM5,与circZNF462.2负相关.
- 减少circZNF462增加了MCM5水平和染色质开放,加剧了DNA损伤;减少MCM5扭转了这种影响.
结论:
- 环ZNF462调节染色质的可访问性,以抑制Cd诱导的DNA损伤.
- 环ZNF462通过MCM5作用,控制染色质开放和DNA损伤.
- CircZNF462是一种潜在的生物标志物和早期干预目标,用于预防环境重金属诱导的遗传损害.
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