法医学杂志 ›› 2022, Vol. 38 ›› Issue (6): 709-718.DOI: 10.12116/j.issn.1004-5619.2021.511006
收稿日期:2021-10-23
发布日期:2022-12-25
出版日期:2022-12-28
通讯作者:
赵贵森
作者简介:赵贵森,男,博士,副教授,硕士研究生导师,主要从事法医物证学研究;E-mail:lyfy@haust.edu.cn基金资助:
Rui YANG(
), Jiong CHEN, Gui-sen ZHAO(
)
Received:2021-10-23
Online:2022-12-25
Published:2022-12-28
Contact:
Gui-sen ZHAO
摘要:
目的 建立一种基于直接PCR(direct PCR,dPCR)扩增和高分辨率熔解(high resolution melting,HRM)曲线分析的唾液菌群快速检测技术,评估其法医学应用价值。 方法 离心收集唾液中的细菌后重悬于Tris-EDTA(TE)缓冲液,直接作为模板用于16S rDNA V4区的扩增和HRM曲线分析,即dPCR-HRM,计算样本HRM图谱相对于参考图谱的判型置信度(genotype confidence percentage,GCP)。以传统的试剂盒(kit)提取模板DNA后再行PCR-HRM(即kPCR-HRM)为参考,验证dPCR-HRM的可行性。用dPCR-HRM法分析梯度稀释模板、群体样本和模拟唾液斑样本,评估其灵敏度、分型能力和检材适应性。 结果 dPCR-HRM法可在90 min内得到唾液菌群的HRM图谱,与kPCR-HRM法之间的GCP>95.85%。应用dPCR-HRM法,一般个体0.29 nL的唾液即可测得菌群HRM型。61例唾液样本可分为10种型,8 h之内的唾液斑与新鲜唾液分型相同(GCP>90.83%)。 结论 dPCR-HRM技术可用于唾液菌群的快速分型,且具有成本低、操作简单等优点。
中图分类号:
杨瑞, 陈炯, 赵贵森. 唾液菌群的直接PCR扩增-高分辨率熔解曲线分析及其法医学应用[J]. 法医学杂志, 2022, 38(6): 709-718.
Rui YANG, Jiong CHEN, Gui-sen ZHAO. Analysis of Salivary Bacterial Community by Direct PCR and High Resolution Melting Curve and Its Forensic Applications[J]. Journal of Forensic Medicine, 2022, 38(6): 709-718.
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