法医学杂志 ›› 2010, Vol. 26 ›› Issue (5): 340-342.DOI: 10.3969/j.issn.1004-5619.2010.05.006

• 论著 • 上一篇    下一篇

应用RNA分析技术推断现场血痕形成时间

许  炎1,蒋  巍2,平  原1,毕  钢1,陈连康1,周怀谷1   

  1. (1. 上海市公安局物证鉴定中心 法医物证学现场应用技术公安部重点实验室 上海市现场物证重点实验室,上海 200083; 2. 上海市公安局 虹口分局,上海 200434)
  • 发布日期:2010-10-25 出版日期:2010-10-28
  • 通讯作者: 通信作者:周怀谷,男,博士,主任法医师,主要从事法医DNA分析技术的应用和研究;E-mail:hgzhou803@hotmail.com
  • 作者简介:许炎(1980—),男,江苏苏州人,硕士,主检法医师,主要从事法医DNA分析技术的应用和研究;E-mail:xxnnxy@hotmail.com
  • 基金资助:

    上海市科学技术委员会科研计划项目(072512022)

Determination of Bloodstain Formation Time by RNA Analysis

XU YAN1, JIANG WEI2, PING YUAN1, BI GANG1, CHEN LIAN-KANG1, ZHOU HUAI-GU1   

  1. (1. Shanghai Key Laboratory of Crime Science Evidence, Key Laboratory of Forensic Evidence and Science Technology, Ministry of Public Security, Institute of Forensic Science, Shanghai Public Security Bureau, Shanghai 200083, China; 2. Hongkou Branch of Shanghai Public Security Bureau, Shanghai 200434, China)
  • Online:2010-10-25 Published:2010-10-28

摘要: 目的 检测血痕中β-actin mRNA和18S rRNA在人体死后8~15 d期间的表达残留,为推断血痕形成时间寻找新的客观依据。 方法 在上述时段内每天抽提血痕总RNA,利用实时定量RT-PCR技术监测18S rRNA和β-actin mRNA的扩增状况并对产物进行定量分析,通过检测18S rRNA与β-actin mRNA含量在各个时间点的变化趋势来推测血痕形成时间。 结果 死后8~15 d时段内18S rRNA与β-actin mRNA量的比值呈明显升高趋势,显示出两种不同类型RNA降解的时间差异性。 结论 一定时段内18S rRNA与β-actin mRNA量的相对变化,可作为推测血痕形成时间的参考指标。

关键词: 法医遗传学, 逆转录聚合酶链反应, 血痕形成时间

Abstract: Objective To investigate the expression of 18S rRNA and β-actin mRNA in bloodstain between 8 and 15 days after death and extrapolate the time of bloodstain formation. Methods RNA in dried bloodstain at different times was extracted, then quantified for 18S rRNA and β-actin mRNA by real-time RT-PCR.  The bloodstain formation time was deduced based on the changes of the ratio of 18S rRNA to β-actin mRNA at different time points. Results The ratio of 18S rRNA to β-actin mRNA increased gradually with time, indicating that rRNA and mRNA degraded  in different rate with time. Conclusion The ratio of 18S rRNA to β-actin mRNA could be used for estimating the time of bloodstain formation in some period.

Key words: forensic genetics, reverse transcriptase polymerase chain reaction(RT-PCR), time of bloodstain

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