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作 者:李林峰 董贺文 柳丹凤 田甜 代号 刘敏[1] LI Lin-feng;DONG He-wen;LIU Dan-feng;TIAN Tian;DAI Hao;LIU Min(West China School of Basic Medical Sciences and Forensic Medicine,Sichuan University,Chengdu 610041,China;Shanghai Key Lab of Forensic Medicine,Key Lab of Forensic Science,Ministry of Justice,Shanghai Forensic Service Platform,Academy of Forensic Science,Shanghai 200063,China)
机构地区:[1]四川大学华西基础医学与法医学院,四川成都610041 [2]司法鉴定科学研究院上海市法医学重点实验室司法部司法鉴定重点实验室上海市司法鉴定专业技术服务平台,上海200063
出 处:《法医学杂志》2019年第6期645-650,共6页Journal of Forensic Medicine
摘 要:目的利用核磁共振氢谱(^1H nuclear magnetic resonance spectroscopy,^1H NMR)代谢组学方法寻找非典型电流损伤死亡大鼠血清中的差异性代谢产物,为生前非典型电击死的判定以及其与死后即刻电击的鉴别提供依据。方法分别制作大鼠非典型电击死模型、死后即刻电击模型、机械性窒息死亡模型、机械性损伤死亡模型和高温损伤死亡模型,对照组大鼠不做任何处理常规处死。取各组大鼠血清进行~1H NMR代谢组学技术检测,筛选差异性代谢产物。结果非典型电击死组与机械性窒息死亡组、机械性损伤死亡组、高温损伤死亡组、对照组间比较,共筛选出4个具有鉴别价值的化学位移点及其对应的多种代谢物,包含醇类、酚类、糖类、氨基酸类等多种小分子物质;非典型电击死组与死后即刻电击组、对照组间比较,共筛选出8个具有鉴别价值的化学位移点及其对应的多种代谢物,包含糖类、氨基酸类、酯类、核酸等多种小分子物质。结论~1H NMR代谢组学技术能够发现非典型电流损伤死亡的差异性代谢产物,有望为非典型电流损伤死亡的诊断以及生前电击与死后即刻电击的鉴别提供依据。Objective To study the differential metabolites of serum in rats dying from untypical electric injury by ~1H nuclear magnetic resonance(^1 H NMR)-based metabolomics methods, in order to provide clues for identification of death from antemortem untypical electric injury and instant postmortem electric injury. Methods Models of rats dying from untypical electric injury, instant postmortem electric injury, mechanical asphyxia, mechanical injury, and high temperature injury were established. The rats in control group were executed without any treatment. The serums of rats from every group were detected by ^1H NMR-based metabolomics technology to screen differential metabolites. Results The rats dying from untypical electric injury group was compared with those from mechanical asphyxia group, mechanical injury group, high temperature injury group, and control group, respectively. Four chemical shift points with diagnostic value, and their corresponding metabolites were screened. These chemical shift points contained many small molecules, such as alcohols, phenols, sugars, amino acids, etc. The death from untypical electric injury group was compared with those from instant postmortem electric injury group and control group, and then eight chemical shift points with diagnostic value and their corresponding metabolites were screened. These chemical shift points contained small molecules, such as sugars, amino acids, esters, nucleic acids, etc. Conclusion The ~1H NMR-based metabolomics technology can identify differential metabolites of serum in rats dying from untypical electric injury, therefore it may provide a basis for the diagnosis of death from untypical electric injury and the identification of antemortem electric injury and instant postmortem electric injury.
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