中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (35): 7562-7570.doi: 10.12307/2025.957

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

缺血性脑卒中诊断性生物标志物解析及靶向铜死亡相关基因的实验验证

陈  莹1,2,郭晓婧1,莫雪妮1,马  威1,武尚志1,李相玲1,谢婷婷1   

  1. 1广西中医药大学中医药壮瑶医药研究院,广西壮族自治区南宁市  530022;2广西国际壮医医院康复科,广西壮族自治区南宁市  530022

  • 收稿日期:2024-10-10 接受日期:2024-12-10 出版日期:2025-12-18 发布日期:2025-05-06
  • 通讯作者: 马威,硕士,助理研究员,广西中医药大学中医药壮瑶医药研究院,广西壮族自治区南宁市 530022
  • 作者简介:陈莹,女,1983年生,2007年广西医科大学内科学毕业,硕士,副主任医师,主要从事中医学、康复医学、临床医学的研究。
  • 基金资助:
    广西自然科学基金资助项目(2023GXNSFAA026105),项目负责人:陈莹;广西中医药大学校级科研项目(2023QN006),项目负责人:马威

Analysis of diagnostic biomarkers for ischemic stroke and experimental validation of targeted cuproptosis related genes

Chen Ying1, 2, Guo Xiaojing1, Mo Xueni1, Ma Wei1, Wu Shangzhi1, Li Xiangling1, Xie Tingting1   

  1. 1Zhuang Yao Institute of Traditional Chinese Medicine, Guangxi University of Chinese Medicine, Nanning 530222, Guangxi Zhuang Autonomous Region, China; 2Department of Rehabilitation, Guangxi International Zhuang Medical Hospital, Nanning 530022, Guangxi Zhuang Autonomous Region, China
  • Received:2024-10-10 Accepted:2024-12-10 Online:2025-12-18 Published:2025-05-06
  • Contact: Ma Wei, Master, Assistant researcher, Zhuang Yao Institute of Traditional Chinese Medicine, Guangxi University of Chinese Medicine, Nanning 530222, Guangxi Zhuang Autonomous Region, China
  • About author:Chen Ying, Master, Associate chief physician, Zhuang Yao Institute of Traditional Chinese Medicine, Guangxi University of Chinese Medicine, Nanning 530222, Guangxi Zhuang Autonomous Region, China; Department of Rehabilitation, Guangxi International Zhuang Medical Hospital, Nanning 530022, Guangxi Zhuang Autonomous Region, China
  • Supported by:
    Guangxi Natural Science Foundation, No. 2023GXNSFAA026105 (to CY); Guangxi University of Chinese Medicine Research Program, No. 2023QN006 (to MW) 

摘要:


文题释义:
缺血性脑卒中:指因脑部血液循环障碍,缺血、缺氧所致的局限性脑组织的缺血性坏死或软化,而出现相应的神经系统功能缺损。作为全球第二大死亡原因,缺血性脑卒中具有高发病率、高致残率、高死亡率和高复发率的特点。
铜死亡:铜作为一种重要的微量元素,参与人体各种生理和生物过程。通过Cu+/Cu2+氧化还原循环的作用,铜作为催化辅因子至少参与30种基本生理活性酶的结构成分,哺乳动物的大脑是最富含铜的器官之一,因此过量的铜或铜缺乏会产生神经毒性作用。

背景:研究表明,缺血性脑卒中的各个过程都有免疫细胞参与,其中铜死亡也起着关键作用。
目的:通过生物信息学筛选出与缺血性脑卒中进展有关的诊断性生物标记物,并对与其发生发展密切相关的铜死亡基因进行分析及验证。
方法:从GEO数据库中获取GSE16561芯片,共包含39例缺血性脑卒中组与24例对照组数据,解析缺血性脑卒中芯片数据的差异表达基因,对差异基因进行GO与KEGG富集分析;通过LASSO和Random Forest法,筛选出影响缺血性脑卒中发生发展的关键基因,建立诊断模型并加以验证;通过免疫细胞浸润与加权基因共表达网络对差异基因进行分析,差异表达的免疫相关基因与铜死亡基因取交集,获得铜死亡免疫相关的Hub基因,并进行体外细胞实验,将大鼠海马神经元细胞分为正常组和缺血性脑卒中组,进行qPCR实验验证。
结果与结论:①差异分析获得573个差异表达基因,主要富集于免疫反应的正向调节等生物学过程和脂质与动脉粥样硬化等信号通路;②机器学习方法筛选出MFN2、PKM2、CREG1、FOXO3A诊断性基因,对缺血性脑卒中可能具有一定的诊断价值;③免疫浸润分析发现浆细胞、NK细胞静息、巨噬细胞等,表明免疫细胞在缺血性脑卒中的发病中发挥着一定作用;④WGCNA结合免疫浸润分析获得118个关键模块基因,与铜死亡基因取交集获得2个铜死亡与免疫特征基因;4个诊断性基因与Hub基因的相关性分析结果显示FOXO3A与MFN2、PKM2与BCL2L1、MTF1与MFN2、ATP7B与BCL2L1的表达具有相关性;⑤qPCR 结果显示,与空白组相比,缺血性脑卒中组基因 MTF1、ATP7B存在显著差异,证实ATP7B、MTF1可作为缺血性脑卒中铜死亡的特征基因,可能通过干预ATP7B、MTF1调节铜死亡来改善缺血性脑卒中。
https://orcid.org/0009-0003-4155-4050(陈莹)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 缺血性脑卒中, 机器学习, 生物信息学, 免疫浸润, 铜死亡, 细胞实验, ATP7B, MTF1

Abstract: BACKGROUND: Studies have shown that immune cells are involved in all processes of ischemic stroke, in which cuproptosis also plays a key role.
OBJECTIVE: To screen diagnostic biomarkers related to the progression of ischemic stroke through bioinformatics, and analyze and validate cuproptosis-related genes closely related to the occurrence and development of ischemic stroke. 
METHODS: The GSE16561 microarray was obtained from the GEO database, containing data from 39 cases of ischemic stroke (ischemic stroke group) and 24 controls (control group). Differentially expressed genes from the ischemic stroke microarray data were analyzed. Gene ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analyses were performed. By using LASSO and Random Forest methods, key genes affecting the occurrence and development of ischemic stroke were screened, and a diagnostic model was established and validated. Differential gene analysis was performed through immune cell infiltration and weighted gene co expression network. The differentially expressed immune-related genes were intersected with cuproptosis genes to obtain the hub genes related to cuproptosis immunity. In vitro cell experiments were conducted to divide rat hippocampal neurons into a normal group and an ischemic stroke group, and qPCR experiments were performed to verify the results. 
RESULTS AND CONCLUSION: (1) 573 differentially expressed genes were obtained by differential analysis. Differentially expressed genes were mainly enriched in biological processes, such as positive regulation of immune response, and signaling pathways such as lipid and atherosclerosis. (2) Machine learning methods were used to screen diagnostic genes such as MFN2, PKM2, CREG1, and FOXO3A, which may have some diagnostic value for ischemic stroke. (3) Immune infiltration analysis revealed resting plasma cells, NK cells, macrophages, etc., indicating that immune cells play a certain role in the pathogenesis of ischemic stroke. (4) Weighted gene co-expression network analysis combined with immune infiltration analysis obtained 118 key module genes, which were intersected with cuproptosis genes to obtain 2 cuproptosis and immune characteristic genes. The correlation analysis between four diagnostic genes and Hub genes showed that the expression of FOXO3A and MFN2, PKM2 and BCL2L1, MTF1 and MFN2, ATP7B and BCL2L1 were correlated. (5) The qPCR results showed significant differences in the genes MTF1 and ATP7B between the ischemic stroke group and the blank group. To conclude, ATP7B and MTF1 can serve as characteristic genes for cuproptosis in ischemic stroke. It is possible to improve ischemic stroke by intervening in ATP7B and MTF1 to regulate cuproptosis. 

Key words: ischemic stroke, machine learning, bioinformatics, immune infiltration, cuproptosis, cellular experiments, ATP7B, MTF1

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