血蛋白学揭示了细胞外矩阵蛋白对腹腔大动脉动脉瘤的潜在因果影响
Samuel Khodursky1, Shuai Yuan1,2,3, Joshua M Spin4,5,6
1Department of Surgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
medRxiv : the preprint server for health sciences
|October 14, 2024
概括
这项研究确定了90种与腹腔大动脉动脉瘤 (AAA) 风险有因果关系的血蛋白. 研究结果表明,细胞外矩阵蛋白中的遗传变异通过改变的血水平影响AAA发育.
科学领域:
- 遗传学 是一个遗传学.
- 心血管疾病 心血管疾病
- 蛋白质组学是指蛋白质组学.
背景情况:
- 腹腔大动脉动脉瘤 (AAA) 是一种严重的血管疾病,具有许多已识别的遗传位点.
- 许多AAA相关的位点可能编码血蛋白,但它们的因果作用仍未得到充分研究.
研究的目的:
- 确定具有对腹腔大动脉动脉瘤 (AAA) 潜在因果影响的血蛋白.
- 利用遗传因果推断来研究血蛋白和AAA之间的关系.
主要方法:
- 采用双样本的孟德尔随机化 (MR) 和来自AAA的一项大型全基因组关联研究 (GWAS) 分析的总结统计数据.
- 从大规模的血蛋白质组学研究中使用蛋白质定量特征位点 (pQTLs) 来生成2,783个血蛋白的遗传仪器.
- 进行了逆方差加权,灵敏度分析,贝叶斯式协同定位和基因本体学 (GO) 丰富分析.
主要成果:
- 鉴定了90种与AAA相关的血蛋白质,错误发现率 (FDR) <0.05,其中25种由同位体支持.
- 确认了之前验证的蛋白质,如PCSK9,LTBP4和COL6A3.3.
- GO分析显示了细胞外矩阵 (ECM) 蛋白质的丰富,其中一些显示了大动脉组织中最大的mRNA水平.
- 双向MR表示的血蛋白水平不是由AAA责任引起的.
结论:
- 突出了对AAA具有潜在因果影响的特定蛋白质和途径,指导了未来的功能研究.
- 提出了一种因果途径,即大动脉ECM蛋白的遗传变异改变了血水平,影响了AAA的发展.
- 在大动脉表达定量特征位点 (eQTLs) 和拼接定量特征位点 (sQTLs) 与特定基因的血pQTLs和AAA风险信号之间证明了同位化.
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