在状细胞病患者的QT间隔延长的遗传变异和效果修饰剂
Mengna Zhang1, William B Hillegass1, Xue Yu1
1Department of Data Science, University of Mississippi Medical Center, Jackson, MS 39216, USA; Department of Medicine, University of Mississippi Medical Center, Jackson, MS 39216, USA.
Gene
|September 23, 2023
概括
在状细胞病 (SCD) 患者中,遗传变异显著延长了纠正的QT (QTc) 间隔,增加了突然心脏死亡的风险. 血清氨酸转胺酶 (ALT) 修改了这种遗传效应,突出了它在SCD心脏健康中的作用.
科学领域:
- 心血管遗传学 心血管遗传学
- 血液学 血液学 血液学
- 药物基因组学 药物基因组学
背景情况:
- 状细胞疾病 (SCD) 是非洲裔美国人普遍存在的遗传性血液疾病,与过早死亡有关.
- 心率校正QT间隔 (QTc) 的延长是SCD患者突然心脏死亡的已知危险因素.
- 遗传变异对SCD中QTc延长的影响仍未得到充分研究.
研究的目的:
- 通过使用多基因风险评分 (PRS) 在SCD患者中验证单核酸多态 (SNPs) 和QTc间隔延长之间的关联.
- 探索PRS,QTc延长和其他因素之间的潜在相互作用,如血清氨酸转胺酶 (ALT) 在患有SCD的非洲裔美国人中.
主要方法:
- 在SCD患者中,与QTc间隔相关的候选遗传变异的基因定型.
- 基于通过线性回归识别的风险SNP构建一个未加权的多基因风险评分 (PRS).
- 用线性回归和分层分析对血清ALT水平和QTc子组件 (QRS,JTc) 评估PRS对QTc间隔的影响.
主要成果:
- 在一个衰退模型下,五个风险SNP被确定为QTc持续时间.
- 每增加一个单位的PRS都与QTc延长有关 (增加4.0毫秒,衰退9.4毫秒).
- 血清ALT表现出修饰作用;PRS在正常ALT群中增加了QTc,但在高ALT群中没有.
结论:
- 候选遗传变异与SCD患者的QTc间隔延长有关.
- 血清ALT在PRS-QTc关系中起着显著的改变因素的作用.
- 这些发现表明尿素循环和氧化代谢与SCD心脏再极化有关,需要进一步调查.
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