异常长寿的遗传特征:对百岁老人和超百岁老人的编码区域单核酸多态 (SNP) 的全面分析
Audre Preena Maria Sundar Raj1, Gayathri Selvakumar1, James Clement2,3
1Department of Biotechnology, Manonmaniam Sundaranar University, Tirunelveli, Tamil Nadu, 627012, India.
Human genomics
|October 8, 2025
概括
研究人员在百岁老人和超百岁老人中确定了常见的遗传变异 (SNP),揭示了与长寿相关的潜在罕见变异和像ECM重塑这样的丰富途径. 这些发现可能有助于更好地理解异常衰老.
科学领域:
- 遗传学 是一个遗传学.
- 老年学是指老年学的学科.
- 分子生物学分子生物学
背景情况:
- 衰老是一个复杂的生物过程,影响脆弱,疾病和死亡率.
- 老年学从进化和个人角度研究影响长寿和衰老的因素.
- 百岁老人和超百岁老人是异常长寿和抗老相关疾病的典范.
研究的目的:
- 研究百岁老人和超百岁老人的常见遗传变异 (SNP).
- 为了确定与异常长寿相关的潜在疾病易感性和罕见变异.
- 探索与长寿相关的丰富生物途径.
主要方法:
- 分析了754,520个常见的单核酸多态 (SNP) 在3个百岁老人和18个超百岁老人.
- 使用SNPnexus和Ensembl编码变体的注释,识别有害和新型变体.
- 变异频率与1000个基因组项目和gnomAD数据库的比较.
- 路径丰富分析以确定与之相关的显著生物路径.
主要成果:
- 在所有21个人中确定了754,520个常见的SNP.
- 标注了 11,348 种编码变体,包括 4980 种非同义变体和 110 种有害变体.
- 在9个基因中发现了16种新型变异,一些SNP在人口数据库中显示低或缺少小等位基因频率 (MAF).
- 发现了148个统计学上显著的丰富途径,包括细胞外矩阵 (ECM) 改造,信号转导和蛋白质/RNA代谢.
结论:
- 初步发现突出了与异常长寿相关的常见和潜在的罕见遗传变异.
- 确定了有害的SNP和丰富的途径,为未来关于衰老遗传基础的研究提供了候选人.
- 需要对更大的队列和对照进行进一步的研究,以验证这些遗传关联并了解长寿机制.
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