在Caco-2细胞暴露于未消化的和已消化的二氧化纳米颗粒时,全基因组甲基化变化发生
Célia Ventura1,2, Ana Valente1,2, Luís Vieira1,2
1Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Lisbon, Portugal.
Epigenomics
|November 25, 2025
概括
二氧化纳米颗粒 (TiO2NPs) 暴露会改变肠道细胞中的DNA甲基化,影响基因表达和细胞通路. 这些效应根据纳米粒子特性和消化状态而有所不同,这凸显了甲基化在纳米毒理学中的重要性.
科学领域:
- 纳米毒理学研究
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
背景情况:
- 二氧化纳米颗粒 (TiO2NPs) 在生物医学和工业中广泛使用.
- 有关TiO2NPs对人类健康的影响存在担忧,特别是通过摄入.
- 纳米材料暴露可以诱导DNA甲基化变化,影响基因表达和疾病发展.
研究的目的:
- 为了研究暴露于TiO2NPs的肠道细胞中的DNA甲基化变化.
- 通过功能途径和基因本体学 (GO) 分析分析细胞效应.
- 为了比较消化与未消化的TiO2NPs的影响.
主要方法:
- 肠道细胞暴露在三种类型的TiO2NPs (NM-102,NM-103,NM-105) 上.
- 在暴露于消化和未消化的NP后,对差异甲基基因 (DMG) 的评估.
- 功能途径和GO分析以确定细胞影响.
主要成果:
- 对于消化的和未消化的TiO2NPs,确定了大量的DMG.
- 未消化的TiO2NP显著影响了G蛋白/腺酸环酶通路.
- 基于消化,观察到共享的与癌症相关的途径和独特的生物过程.
- 与其他TiO2NPs相比,NM-105独特诱导过甲基化.
结论:
- 暴露于TiO2NPs会诱导肠道细胞中的功能性DNA甲基化变化.
- TiO2NPs的影响受其物理化学特性和消化状态的影响.
- DNA甲基化是评估纳米材料毒性的关键因素.
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