人类葡萄糖皮质体受体变体rs6190促进血液中的胆固醇和动脉样硬化
Hima Bindu Durumutla1,2, April Haller3, Greta Noble1
1Molecular Cardiovascular Biology, Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
bioRxiv : the preprint server for biology
|December 16, 2024
概括
葡萄糖皮质体受体 (GR) 基因中的遗传变异 (rs6190) 通过增强肝脏基因活性,增加了女性的胆固醇和动脉样硬化风险. 这种依赖于GR的机制突显了一种新的途径,有助于心血管疾病风险.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 心血管科学 心血管科学
背景情况:
- 胆固醇升高是心血管疾病的主要危险因素,特别是在老年妇女中.
- 葡萄糖皮质体受体 (GR) 调节营养代谢,但其在胆固醇平衡中的作用尚不清楚.
- 一种特定的GR基因变异,rs6190,已与胆固醇水平有关.
研究的目的:
- 研究GR rs6190单核酸多态 (SNP) 在胆固醇调节和动脉样硬化中的作用.
- 阐明RS6190SNP影响脂蛋白代谢的分子机制.
- 为了确定这种机制是否在人体细胞中保存.
主要方法:
- 分析英国生物银行和我们所有人的数据集,将rs6190与胆固醇水平联系起来.
- 生产SNP基因复制转基因小鼠以研究SNP的功能影响.
- 使用小鼠模型和人类诱导多能干细胞 (hiPSCs) 的体内和体外实验.
- 使用CRISPR-Cas9基因编辑技术,通过rs6190 SNP对人类细胞进行改造.
主要成果:
- 在人类数据集中,rs6190 SNP与增加的胆固醇水平有关.
- 在小鼠中,rs6190 SNP增强了肝脏GR活性,增加了PCSK9和BHLHE40的表达.
- 这导致循环胆固醇升高,动脉样硬化风险和严重程度增加,PCSK9和BHLHE40敲击阻止了这种情况.
- 该机制在CRISPR工程的人类肝细胞样细胞中得到证实.
结论:
- GR rs6190 SNP代表了一种新的遗传因素,有助于增加胆固醇和动脉样硬化风险.
- 这种SNP增强GR活性,导致PCSK9和BHLHE40的表达改变,影响LDL和HDL受体水平.
- 这些发现揭示了动性风险的保留GR-依赖性途径,特别适用于女性.
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