检验医学 ›› 2022, Vol. 37 ›› Issue (7): 664-668.DOI: 10.3969/j.issn.1673-8640.2022.07.013

• 基础研究·论著 • 上一篇    下一篇

基于GEO数据库筛选阿尔茨海默病的关键基因及信号通路

侯玉丽1, 王怡斐2, 付静轩1, 王培昌1()   

  1. 1.首都医科大学宣武医院检验科 国家老年疾病临床医学研究中心,北京 100053
    2.首都医科大学临床检验诊断学系,北京 100069
  • 收稿日期:2021-12-01 修回日期:2022-06-10 出版日期:2022-07-30 发布日期:2022-08-26
  • 通讯作者: 王培昌
  • 作者简介:王培昌,E-mail: pcw1905@126.com
    侯玉丽,女,1992年生,博士,检验师,主要从事衰老相关分子机制研究;
    王怡斐,女,2004年生,主要从事衰老相关疾病机制研究。第一联系人:

    侯玉丽与王怡斐对本研究具有同等贡献,并列为第一作者。

  • 基金资助:
    国家自然科学基金项目(81871714);国家自然科学基金项目(81901406);2021年度“扬帆”计划重点医学专业项目(ZYLX202114);北京市临床重点专科(建设项目);宣武医院国家自然科学基金青年培育项目(QNPY2021036)

Key genes and signal pathways of Alzheimer's disease based on GEO database

HOU Yuli1, WANG Yifei2, FU Jingxuan1, WANG Peichang1()   

  1. 1. Department of Clinical Laboratory,Xuanwu Hospital,Capital Medical University,the National Clinical Research Center for Geriatric Diseases,Beijing 100053,China
    2. Faculty of Laboratory Medicine,Capital Medical University,Beijing 100069,China
  • Received:2021-12-01 Revised:2022-06-10 Online:2022-07-30 Published:2022-08-26
  • Contact: WANG Peichang

摘要:

目的 采用生物信息学分析方法从GEO数据库筛选与阿尔茨海默病(AD)发生、发展密切相关的基因及信号通路。方法 从GEO数据库选择GSE118553作为分析数据集,GSE106241作为关键基因的验证数据集。从GSE118553数据集筛选出差异表达基因,对差异表达基因进行基因本体(GO)富集分析、京都基因与基因组数据库(KEGG)通路分析。构建蛋白质-蛋白质相互作用(PPI)网络,筛选出评分居前10位的关键基因。采用GSE106241数据集验证筛选出的10个关键基因在不同braak分级AD患者与正常对照者颞叶皮层组织中表达的差异及其与β-淀粉样蛋白(Aβ)42表达的相关性。结果 从GSE118553数据集中筛选出157个差异表达的基因,其中表达上调88个、表达下调69个。GO富集和KEGG通路分析结果显示,差异表达基因涉及γ-氨基丁酸(GABA)信号通路、神经递质传递和突触传递等。在PPI网络中,筛选出的评分居前10位的关键基因分别为SNAP25、SYT1、GRIN2ASLC12A5、GAD1、GABRG2、GABRDPVALBGABRB2和FN1。采用GSE106241数据集进行验证,结果显示,不同braak分级AD患者之间颞叶皮层组织SNAP25、SYT1、GRIN2ASLC12A5、GAD1、GABRG2、GABRDPVALBGABRB2表达差异均有统计学意义(P<0.05)。Pearson相关分析结果显示,SNAP25、SYT1、SLC12A5表达与Aβ42表达呈负相关(r值分别为-0.354、-0.283、-0.310,P<0.05)。结论 筛选出的关键基因SNAP25、SYT1和SLC12A5或可作为AD潜在的生物标志物,为AD的诊疗提供新的靶点。

关键词: 阿尔茨海默病, 生物信息学, 关键基因, 信号通路

Abstract:

Objective To screen the differentially expressed genes(DEG) and signal pathways related to Alzheimer's disease(AD) using bioinformatics analysis methods based on GEO database. Methods GSE118553 was selected from GEO database as the analysis dataset,and GSE106241 was used as the validation dataset of key genes. The DEG were selected from the GSE118553 dataset matrix. Using cluster profile package,Gene Ontology(GO) analysis and Kyoto Encyclopedia of Genes and Genomes(KEGG) pathway analysis on DEG were preformed. Protein-protein interaction(PPI) network was constructed to screen out the top 10 key genes involved in AD. GSE106241 dataset was used to verify the expression differences of 10 key genes in temporal cortex tissues of AD patients with different braak grades to healthy controls and the correlation with amyloid bata-protein(Aβ)42 expression. Results There were 157 DEG obtained in GSE118553 dataset,including 88 up-regulated genes and 69 down-regulated genes. GO analysis and KEGG pathway analysis showed that DEG were enriched in gamma-aminobutyric acid(GABA) signaling pathway,neurotransmitter transmission and synaptic transmission and so on. A PPI network of DEG was constructed,and 10 key genes(SNAP25,SYT1,GRIN2A,SLC12A5,GAD1,GABRG2,GABRD,PVALB,GABRB2 and FN1) related to Alzheimer's disease were verified. The GSE106241 dataset was used for verification,and the results showed that there was statistical significance in the expression of SNAP25,SYT1,GRIN2A,SLC12A5,GAD1,GABRG2,GABRD,PVALB and GABRB2 in temporal cortex tissues of AD patients with different braak grades(P<0.05). Pearson correlation analysis showed that the expression of SNAP25,SYT1 and SLC12A5 were negatively correlated with the expression of Aβ42(r values were -0.354,-0.283 and -0.310,respectively,P<0.05). Conclusions The obtained key genes,SNAP25,SYT1 and SLC12A5,may be potential biomarkers of Alzheimer's disease and provide new targets for the diagnosis and treatment of AD.

Key words: Alzheimer's disease, Bioinformatics, Hub gene, Signal pathway

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