化物通过 histone H3K27 乙化改变基因表达,这种基因表达发生在类似于氨基母细胞的 LS8 细胞中
Shohei Yamashita1, Motoki Okamoto1, Melanie Mendonca1,2
1Department of Oral Science and Translational Research, College of Dental Medicine, Nova Southeastern University, Fort Lauderdale, FL 33314, USA.
International journal of molecular sciences
|September 14, 2024
概括
化物暴露通过改变基因素乙化来改变发育中的牙中的基因表达. 这种表观遗传修饰会影响参与细胞死亡和生长的基因,导致牙化.
科学领域:
- 生物化学 生物化学
- 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:
- 在牙发育过程中过度摄入化物会导致牙化.
- 化物激活了组织酸转移酶 (HAT),导致p53乙化,并促进LS8细胞中的毒性.
- 在化物诱导的基因表达变化中,HAT和基因素乙化的特定作用以前是未知的.
研究的目的:
- 为了研究化物对LS8细胞中基因修饰和基因表达的影响.
- 为了确定由化物介导的基因乙化调节的特定基因.
- 探索HAT和HDAC抑制剂在调节化物效应方面的潜力.
主要方法:
- 用化物对待LS8细胞,然后对H3K27ac.进行ChIP-Seq分析.
- 确定了转录起点附近具有差异H3K27ac峰值的基因.
- 使用实时PCR (qPCR) 来量化受影响基因的mRNA水平.
- 评估了HAT抑制剂 (酸,MG149) 和HDAC抑制剂 (酸丁酸盐) 的作用.
主要成果:
- 化物增加了H3K27ac水平和Bax,p21和Mdm2的mRNA表达.
- 化物降低了H3K27ac水平,并抑制了p53,Bad和Bcl2的转录.
- HAT抑制剂降低了化物诱导的p21和Mdm2的上调.
- 在化物存在的情况下,酸盐增强了Bad和Bcl2的表达.
结论:
- 化物暴露会通过LS8细胞的H3乙化诱导基因表达的表观遗传变化.
- 这些修改影响了参与细胞亡和细胞周期调节的关键基因.
- 这项研究提供了通过H3乙化通过化物对表观遗传调节的第一个证据,为牙化机制提供了洞察力.
- 需要进一步的研究,以充分了解化物毒性在膜发育中的表观遗传途径.
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