短期暴露于非功能化聚乙烯纳米颗粒对人类外周血液单核细胞中DNA甲基化和基因表达的影响
Kinga Malinowska1, Kateryna Tarhonska2, Marek Foksiński3
1Department of Biophysics of Environmental Pollution, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska Str. 141/143, 90-236 Lodz, Poland.
International journal of molecular sciences
|December 17, 2024
概括
聚乙烯纳米颗粒 (PS-NPs) 没有改变全球DNA甲基化,但在高度下增加了5-基甲基-2'-脱氧氨. 较小的PS-NP (29nm,44nm) 调节TP53和CDKN2A基因表达,表明大小和度依赖的影响.
科学领域:
- 环境表观遗传学环境表观遗传学
- 纳米毒理学研究
- 致癌研究 致癌研究
背景情况:
- 表观遗传修饰在致癌过程中至关重要,并且可以受到环境因素的影响.
- 纳米颗粒 (NP) 是越来越普遍的环境异生菌,具有潜在的健康影响.
- 人类外周血液单核细胞 (PBMC) 为研究NP对人体细胞的影响提供了相关的体外模型.
研究的目的:
- 研究非功能化聚烯纳米颗粒 (PS-NP) 对人类PBMCs的度和大小依赖的表观遗传效应.
- 评估PS-NP对DNA甲基化,特定表观遗传修饰和与致癌相关的基因表达特征的影响.
- 确定NP大小 (29nm,44nm,72nm) 在这些细胞反应中的作用.
主要方法:
- 在24小时内,PBMC暴露于PS-NP的不同度 (0.001100μg/mL).
- 质谱学量化了DNA的修饰 (5-mdC,5-hmdC,dU,5-hmdU).
- 分析了瘤抑制剂和原瘤基因的促剂甲基化,以及通过实时PCR的基因表达.
主要成果:
- 没有观察到全球DNA甲基化/脱甲基化或dU水平的显著变化.
- 在较大的 (72 nm) PS-NPs的最高度下,发现了5-hmdU度的增加.
- 29nm PS-NPs (29nm, 44nm) 改变了TP53基因表达,以大小和度为依赖;29nm PS-NPs在高度下也增加了CDKN2A表达.
结论:
- 短期暴露于非功能化PS-NP并没有诱导全球表观遗传变化,也没有影响关键癌症相关基因的促进物甲基化.
- 特定的表观遗传修饰 (5-hmdU) 和基因表达特征 (TP53,CDKN2A) 被PS-NP以大小和度依赖的方式调节.
- 这些发现突出了某些纳米粒子特征可能影响与致癌相关的细胞过程的潜力.
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