一个系统的方法,以改善下游单细胞分析的DEPArrayTM技术
Janine Schulte1, Michael A Marciano2, Eva Scheurer1
1Institute of Forensic Medicine, University of Basel, Basel, Switzerland.
Journal of forensic sciences
|July 27, 2023
概括
这项研究优化了低模板DNA的短串重复 (STR) 分析,发现减少PCR体积可以提高峰值高度,但增加了文物. 像ESIFast和NGMDetect这样的特定套件显示出对单细胞基因型定型的前景.
科学领域:
- 法医科学 法医科学 法医科学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 商业STR放大套件缺乏低模板DNA分析的验证.
- 目前用于单细胞分析的方法依赖于调整PCR周期和分析值.
研究的目的:
- 为了确定从稀释的DNA中获取信息性STR概况的最佳条件.
- 通过使用DEPArrayTM技术在单细胞上评估这些条件.
主要方法:
- 与四个法医STR套件进行了比较,其放大体积和DNA稀释量各不相同 (低至3.0ppg).
- 测试了两个选择的单个/聚合白细胞和精子细胞基因定型套件.
- 分析了峰值高度,文物生成和位置失效.
主要成果:
- 减少PCR体积 (50%-75%) 改善了峰值高度,但增加了稀释DNA的文物.
- 聚合6C显示,从减小体积来实现配置完整性的好处.
- ESIFast和NGMDetect为单个/聚合细胞的共识分析提供了基础,以局部脱落作为随机事件.
- 12.5μL放大体积产生了适当的峰值高度和口吃频率,而口吃峰值是单细胞形状中的主要工件.
结论:
- 优化PCR条件,包括降低放大体积,可以增强低模板DNA的STR分析.
- 特定的STR套件证明了单细胞基因定型的实用性,尽管随机事件和文物需要仔细考虑.
- 需要进一步的研究来完善低模板DNA分析技术.
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