法医学杂志 ›› 2001, Vol. 0 ›› Issue (2): 65-68.

• 论文 •    下一篇

大鼠肾细胞核DNA含量与死亡时间关系的研究

刘良,彭东兵,刘艳,邓伟年,刘亚玲,李劲军   

  1. 华中科技大学同济医学院法医病理教研室!湖北武汉 430030,南昌市公安局刑科所!江西 330008,华中科技大学同济医学院法医病理教研室!湖北武汉 430030,华中科技大学同济医学院法医病理教研室!湖北武汉 430030,华中科技大学同济医学院附属协和医院新儿科!湖北武汉 430030,青
  • 发布日期:2001-04-25 出版日期:2001-04-28

A study on the relationship between postmortem interval and the changes of DNA content in the kidney cellule of rat

LIU LIANG1, PENG DONG- BIN1,LIU YAN2,ET AL.( 1.DEPARTMENT OF FORENSIC MEDICINE TONGJI MEDICAL UNIVERSITY,WUHAN 430030; 2.THE CRIMINAL SCIENCE RESEARCH INSTITUTION,BUREAU OF NANCHANG POLICE,NANCHANG 330008) [   

  • Online:2001-04-25 Published:2001-04-28

摘要: 目的 研究 DNA含量与死亡时间关系。方法 应用计算机图像分析技术,测定了 15只大鼠在死后 48h内不同时间点大鼠肾细胞核 DNA含量的面积( Area)、等效直径( Mean- Dia, MD)、异形指数( Index of density, ID)、平均光度( Average optical density, AOD)、积分光度( Integral optical density, IOD)、密度变化数( L- Den- Coe, LDC)和平均灰度( Average gray, AG)等七项参数的变化值。结果 在大鼠死亡的相对早期( 48h内),其细胞核 DNA降解速率与 PMI具有一定相关性。本实验并将每个参数的测量值进行了多项式运算,获得了更能体现 DNA降解趋势的二项式回归方程。结论 应用计算机图像分析技术,测量机体死后 DNA含量变化,将会成为推断死亡时间精确、客观的新方法。

关键词: 死亡时间, 图像分析, 大鼠, 肾, DNA含量

Abstract: Objective To study changes of DNA content in the kidney cellule of rats and relationship with the postmortem interval.Methods This experiment chose seven parameter of cell nuclear,including the area and integral optical density,determined the changes of DNA content in the kidney cellule of 15 rats at different intervals between 0 and 48h postmortem with auto- TV- image system.Results The degradation rate of DNA in nuclear has a certainty relationship to early PMI(in 48h) of rat,and get binomial regress equation. Conclusion Determining the quantity of DNA in nuclear should be an objective and exact way to estimate the PMI. [

Key words: PMI, image analysis, rat, kidney, DNA, degradation