用下一代测序进行法医DNA分析的基于杂交捕获的遗传面板的评估
Xi Xiong1, Haisong Weng2, Minghui Jin3
1Department of Forensic Medicine, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan 430030, China; Biocsi Biotec Co., Ltd., No. 6 Gongnong Road, Wuhan 430035, China.
Forensic science international
|August 16, 2025
概括
这项研究引入了一个新的下一代测序 (NGS) 面板,使用单核酸多态 (SNP) 进行法医DNA分析. 这种先进的方法提高了退化DNA的准确性,并为汉族人口提供了强大的识别能力.
科学领域:
- 法医遗传学 法医遗传学
- 分子生物学分子生物学
- 人口遗传学 人口遗传学
背景情况:
- 短串联重复 (STR) 是标准的法医标记,但与退化或痕迹DNA样本作斗争.
- 单核酸多态 (SNP) 是克服STR限制在法医应用中的有希望的替代方案.
研究的目的:
- 开发和验证一种基于捕获的新型杂交SNP面板,与下一代测序 (NGS) 集成,用于法医DNA分析.
- 为了在汉族人口中建立一个全面的SNP小组,建立特定群体的等位基因频率.
主要方法:
- 为NGS开发了一个基于捕获的混合化SNP面板.
- 基因定型了8,464个与汉族无关的中国人,以确定等位基因的频率.
- 应用了严格的质量控制,包括哈迪-韦恩伯格平衡和链接不平衡分析,以完成SNP小组.
- 评估灵敏度,样品类型性能和储存稳定性.
主要成果:
- 在质量控制后,建立了一个由2,790个自体SNP组成的最终小组.
- 该系统表现出高灵敏度,使得仅用0.1 ng DNA就可以进行可靠的分析.
- 实现了特殊的歧视权,总歧视权 (TDP) 为1-4.75 × 10-1149.
- 与其他样本类型相比,口腔抽样在长时间储存后显示出更大的时间稳定性.
结论:
- 开发的基于NGS的SNP面板为汉族中国人群的法医识别和亲属分析提供了强大的解决方案.
- 这种方法提供了增强的降解耐受性和广泛的样本适用性,超过了传统STR分析的局限性.
- 该小组的种群特异性等位基因频率和高分辨能力确保了准确的法医案例工作和遗传关系测试.
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