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5-Chloro-2'-deoxycytidine诱导一种独特的高分辨率突变谱的转变突变在生物体内
Marisa Chancharoen1,2, Zhiyu Yang1, Esha D Dalvie1
1Departments of Biological Engineering and Chemistry, and Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
Chemical research in toxicology
|February 23, 2024
概括
该研究表明,DNA前体池中的5-chlorocytosine (5ClC) 会导致特定的突变. 这种突变性模式类似于与炎症相关的人类癌症中发现的特征.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 5-chlorocytosine (5ClC) 在炎症组织中发现,可以引起C到T突变,作为一个胺模仿剂.
- 有两种5ClC形成的机制:酸直接损害DNA或从受损的核酸池中加入.
研究的目的:
- 为了研究5-chloro-2'-deoxycytidine (5CldC) 对核酸池的突变效应.
- 描述5CldC在细胞DNA中诱导的特定突变.
主要方法:
- 在生长介质中暴露大肠杆菌和小鼠胚胎纤维细胞 (MEF) 于5CldC.
- 高分辨率的MEF的DNA测序,以分析突变类型和频率.
主要成果:
- 在大肠杆菌和MEF中,5CldC具有强烈的突变性,表明细胞从核酸池中吸收和纳入.
- 观察到的主导突变是CG到TA的转变,特别是在5'-GC(Y) - 3'环境中.
- 5CldC的突变谱与人类癌症突变标志SBS84和SBS42相似,与炎症和AID活性相关.
结论:
- 5CldC在细胞中诱导了一种独特和可重复的突变模式.
- 这种模式紧密地模仿了在人类炎症疾病和某些癌症中观察到的突变特征.
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