在一个多祖先队列中,mtDNA复制数的遗传和表型相关性
Arslan A Zaidi1, Anurag Verma2, Colleen Morse2
1Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
HGG advances
|May 31, 2023
概括
线粒体DNA拷贝数 (mtCN) 与各种疾病有关. 这项研究揭示了它的遗传性因祖先而异,与健康状况的关联也各不相同,强调了谨慎的解释.
科学领域:
- 遗传学 是一个遗传学.
- 线粒体生物学 线粒体生物学
- 人口健康 人口健康
背景情况:
- 线粒体DNA拷贝数 (mtCN) 是线粒体健康和疾病风险的潜在生物标志物.
- 在研究中,mtCN与常见疾病之间的关联是不一致的.
- 了解mtCN变异的遗传和表型基础至关重要.
研究的目的:
- 通过全基因组和全现象关联研究来研究mtCN的遗传结构.
- 探索mtCN遗传性和关联中的祖先特异性差异.
- 为了确定与mtCN相关的与健康相关的表型.
主要方法:
- 来自宾夕法尼亚大学医学生物库 (PMBB) 的30666名个体的基因组和现象范围的关联研究 (GWAS/PheWAS).
- 从外体序列数据估计mtCN,考虑到细胞组成.
- 复制已知的遗传关联,探索祖先特异性的效应.
主要成果:
- 复制了mtCN的已知遗传关联,在欧洲和非洲祖先之间具有很高的相关性.
- 与欧洲祖先相比,在非洲祖先的个人中发现mtCN遗传率显著更高.
- 在祖先之间确定了mtCN与代谢活跃组织疾病 (例如心血管疾病,肝损伤) 之间的强有力的关联.
- 发现了和前列腺癌等疾病的祖先特定关联.
- 证明mtCN-表型关联对血液细胞组成和环境因素敏感.
结论:
- mtCN遗传性及其与各种健康状况的关联显示出显著的祖先依赖模式.
- 强大的mtCN与代谢活跃组织疾病的关联在祖先之间是一致的.
- 研究中mtCN-表型关联的不一致性可能是由于血液细胞组成和环境修饰因子.
- 解释mtCN作为疾病生物标志物需要仔细考虑遗传祖先和潜在的混因素.
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