法医学杂志 ›› 2022, Vol. 38 ›› Issue (4): 443-451.DOI: 10.12116/j.issn.1004-5619.2022.420509

• 论著 •    下一篇

基于大鼠心肌组织mRNA表达谱筛选冠状动脉性猝死相关生物标志物

郭相杰(), 李昊, 白雅琴, 吴鹏, 赵春梅, 董祎铭, 陈念念, 贠克明, 高彩荣()   

  1. 山西医科大学法医学院,山西 晋中 030600
  • 收稿日期:2022-05-18 发布日期:2022-08-25 出版日期:2022-08-28
  • 通讯作者: 高彩荣
  • 作者简介:高彩荣,女,博士,博士研究生导师,主要从事猝死相关的法医病理学研究;E-mail:gaocairong5175@163.com
    郭相杰(1981—),男,博士,副教授,硕士研究生导师,主要从事疑难复杂死因的法医病理鉴定;E-mail:258187101@qq.com
  • 基金资助:
    国家自然科学基金资助项目(81971790);山西省基础研究计划资助项目(20210302123314)

Screening Biomarkers of Sudden Coronary Death Based on mRNA Expression Profile of Rat Myocardial Tissues

Xiang-jie GUO(), Hao LI, Ya-qin BAI, Peng WU, Chun-mei ZHAO, Yi-ming DONG, Nian-nian CHEN, Ke-ming YUN, Cai-rong GAO()   

  1. School of Forensic Medicine, Shanxi Medical University, Jinzhong 030600, Shanxi Province, China
  • Received:2022-05-18 Online:2022-08-25 Published:2022-08-28
  • Contact: Cai-rong GAO

摘要:

目的 探寻冠状动脉性猝死(sudden coronary death,SCD)大鼠心肌组织信使RNA(messenger RNA,mRNA)的差异表达,为SCD的法医学鉴定提供思路。 方法 建立SCD大鼠模型,利用二代测序技术进行转录组测序;用R软件limma包筛选SCD大鼠心肌组织中差异表达基因(differentially expressed gene,DEG),使用STRING数据库及Cytoscape 3.8.2软件对DEG构建蛋白质-蛋白质相互作用(protein-protein interaction,PPI)网络,并基于cytoHubba插件筛选相关hub基因。用R软件clusterProfiler包对筛选到的DEG进行生物学功能和信号通路富集分析。 结果 共有177个DEG与SCD相关,主要参与肾素-血管紧张素系统、PI3K-Akt信号通路等。血管紧张素原(angiotensinogen,AGT)、补体成分4a(C4a)、Fos原癌基因(Fos proto-oncogene,FOS)等基因在SCD的发生发展过程中发挥关键作用。 结论 AGTC4aFOS等基因有望成为鉴定SCD的潜在生物标志物,基于mRNA表达谱的研究可为SCD的法医学鉴定提供参考。

关键词: 法医病理学, 冠状动脉性猝死, 信使RNA, 差异表达基因, 生物标志物, 心肌缺血, 死亡原因, 大鼠

Abstract:

Objective To explore the differential expression of messenger RNA (mRNA) in myocardial tissues of rats with sudden coronary death (SCD), and to provide ideas for the forensic identification of SCD. Methods The rat SCD model was established, and the transcriptome sequencing was performed by next-generation sequencing technology. Differentially expressed genes (DEGs) in myocardial tissues of SCD rats were screened by using the R package limma. A protein-protein interaction (PPI) network was constructed by using the STRING database and Cytoscape 3.8.2 on DEG, and hub genes were screened based on cytoHubba plug-in. Finally, the R package clusterProfiler was used to analyze the biological function and signal pathway enrichment of the selected DEG. Results A total of 177 DEGs were associated with SCD and were mainly involved in the renin-angiotensin system and PI3K-Akt signaling pathway. The genes including angiotensinogen (AGT), complement component 4a (C4a), Fos proto-oncogene (FOS) and others played key roles in the development of SCD. Conclusion Genes such as AGT, C4a, FOS and other genes are expected to be potential biomarkers for forensic identification of SCD. The study based on mRNA expression profile can provide a reference for forensic identification of SCD.

Key words: forensic pathology, sudden coronary death, messenger RNA (mRNA), differentially expressed gene, biomarker, myocardial ischemia, cause of death, rats

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