法医学杂志 ›› 2005, Vol. 0 ›› Issue (1): 19-20.

• 论文 • 上一篇    下一篇

根据mRNA稳定性推断死亡时间的研究

肖俊辉,陈玉川,王江峰,高翠莲,刘水平,成建定   

  1. 中山大学基础医学院法医病理教研室,中山大学基础医学院法医病理教研室,中山大学基础医学院法医病理教研室,中山大学基础医学院法医病理教研室,中山大学基础医学院法医病理教研室,中山大学基础医学院法医病理教研室 广东广州,510080 ,广东广州,510080 ,广东广州,510080 ,广东广州,510080 ,广东广州,510080 ,广东广州,510080
  • 发布日期:2005-02-25 出版日期:2005-02-28

A Preliminary Study on Estimation of Postmortem Interval According to β-actin mRNA Stability in Rat

XIAO JUN-HUI, CHEN YU-CHUAN, WANG JIANG-FENG, ET AL. (DEPARTMENT OF FORENSIC PATHOLOGY, PRELIMINARY MEDICAL COLLEGE OF SUN YAT-SEN UNIVERSITY, GUANGZHOU 510080,CHINA)   

  • Online:2005-02-25 Published:2005-02-28

摘要: 目的检测大鼠肺、胸肌β肌动蛋白(β-actin)mRNA在死后不同时间的表达,为死亡时间的推断寻找新的指标。方法大鼠断颈处死后于21℃温度控制系统模拟死后改变,在不同时间点抽提相应组织总RNA,利用RT-PCR技术检测β-actinmRNA的表达水平变化并对扩增产物进行半定量分析。结果大鼠肺β-actinmRNA于死后12d仍可检出,胸肌在死后8d的检测呈阴性。β-actinmRNA在肺脏和胸肌的稳定性呈现器官差异性和时间差异性。结论观察死后肺、胸肌β-actinmRNA的变化,可为死亡时间推断提供客观依据。

关键词: 死亡时间, RT-PCR, β肌动蛋白, 大鼠, 肺脏, 胸肌

Abstract: Objective In order to find a new parameter to estimate the postmortem interval, β-actin mRNA in lung and thoracic muscle of rats was detected at different time point postmortem. Methods Rats were killed by neck dislocation and left in a temperature controlling system at 21 ℃ for 12 days postmortem. Total RNA in lung and thoracic muscle at different time point was extracted and β-actin mRNA expression was examined by RT-PCR. Semi-quantification analysis of the image of electrophoresis was performed to confirm the changes of β-actin mRNA expression. Results β-actin mRNA in lung of rats still could be detected at 12 days postmortem, but disappeared in thoracic muscle at 8 days postmortem. Conclusion The expression of β-actin mRNA in lung and thoracic muscle could be a new parameter for estimation of PMI.

Key words: postmortem interval, RT-PCR, β-actin mRNA, rat, lung, thoracic muscle