在SORT1中的Missense变体与阿米什人群中的LDL-C有关
Kelly A Mitok1, Kathryn L Schueler1, Sarah M King2
1Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA.
Journal of lipid research
|November 1, 2023
概括
在SORT1基因中的遗传变异影响低密度脂蛋白胆固醇 (LDL-C) 水平. 这项研究确定了与LDL-C相关的人类特定的SORT1编码变异,并探索了它们的影响,支持SORT1作为胆固醇调节中的关键基因.
科学领域:
- 遗传学 是一个遗传学.
- 心血管疾病 心血管疾病
- 分子生物学分子生物学
背景情况:
- 在1p13.3位点的常见非编码变异与低密度脂蛋白胆固醇 (LDL-C) 相关.
- 由于验证研究的结果相互矛盾,SORT1基因在LDL-C调节中的作用尚不清楚.
- 1p13.3位点影响多个基因,质疑SORT1的因果作用.
研究的目的:
- 研究SORT1在LDL-C调节中的因果作用.
- 识别和描述与LDL-C水平相关的SORT1中的编码变异.
- 为了比较SORT1变异对人类和小鼠胆固醇代谢的影响.
主要方法:
- 在阿米什人群中进行整体外基因组测序,以识别SORT1编码变体.
- 使用离子流动性的血脂蛋白颗粒子类的分析.
- 在小鼠中进行CRISPR/Cas9基因编辑以引入SORT1突变.
主要成果:
- 确定了与人类LDL-C增加和减少相关的SORT1编码变体 (K302E,Q225H).
- 在SORT1 K302E载体中,较高水平的大型LDL颗粒.
- 鼠标模型显示了特定物种的影响:K302E降低了非HDL胆固醇,而Q225H没有影响.
结论:
- 在SORT1中自然存在的编码变异与人类的LDL-C水平有关.
- 这些发现提供了强有力的证据,证明SORT1是1p13.3位点影响LDL-C的因果基因.
- 对于SORT1对胆固醇代谢的影响的特定物种差异需要进一步研究.
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