阿尔茨海默病NK细胞与铜死亡的相关基因分析  

Cuproptosis-related genes in natural killer cells of Alzheimer’s disease

作　　者：陈桂琳 汤其强 Chen Guilin;Tang Qiqiang(Department of Neurology,Provincial Hospital Affiliated to Anhui Medical University,Hefei 230001,Anhui Province,China)

机构地区：[1]安徽医科大学附属省立医院神经内科,安徽省合肥市230001

出　　处：《中国组织工程研究》2025年第19期4172-4180,共9页Chinese Journal of Tissue Engineering Research

基　　金：中国科学院战略性先导科技专项(B类)子课题(XDB39040400),项目负责人:汤其强。

摘　　要：背景:阿尔茨海默病的免疫相关致病机制尚不明确,通过生物信息学探讨阿尔茨海默病患者NK细胞与铜死亡机制的相关性,可为研究阿尔茨海默病的发生发展提供新方向。目的:使用生物信息学分析方法筛选阿尔茨海默病患者外周血中NK细胞与铜死亡相关的关键基因,并在临床标本水平加以验证。方法:利用GEO在线数据库筛选阿尔茨海默病患者外周血转录组差异表达基因和NK细胞相关基因,与已报告的铜死亡因子取交集,获取差异表达的铜死亡相关基因;接着采用RT-qPCR技术对基因相对表达量进行实验验证,实验样本来自于安徽省立医院神经内科2021-2023年住院患者的外周血,按照纳排标准纳入疾病组30例及对照组20例。后续进一步使用在线GeneMANIA网站构建蛋白质-蛋白质互作网络;利用R语言进行免疫浸润分析;基于ENCODE数据库进行转录因子预测。结果与结论:①利用GSE63060数据集中阿尔茨海默病患者外周血转录组差异表达基因、GSE168522数据集中NK细胞相关基因、已报告的铜死亡基因,应用在线韦恩图工具、LASSO算法及随机森林机器学习方法筛选获取4个差异表达的铜死亡相关基因:铁氧还原蛋白1(ferredoxin 1,FDX1)、铜离子转运ATP酶a肽(ATPase Cu^(2+)transporting alpha polypeptide,ATP7A)、丙酮酸脱氢酶β(pyruvate dehydrogenase El subunit beta,PDHB)和二氢硫辛酰胺琥珀酰转移酶(dihydrolipoamide succinyltransferase,DLST)。②临床样本实验验证,FDX1和ATP7A在阿尔茨海默病患者外周血中表达上调(P<0.001),且在载脂蛋白E4不同基因型中呈差异性表达(P<0.01,P<0.001);PDHB和DLST在阿尔茨海默病患者外周血中表达下调(P<0.001),在载脂蛋白E4不同基因型中表达无显著性意义(P>0.05)。③蛋白质-蛋白质互作网络发现20种功能蛋白与关键基因相关联,免疫浸润分析结果验证了关键基因与12个免疫细胞具有显著相关性(以P<0.05为具有�BACKGROUND:The immune-related pathogenesis of Alzheimer’s disease is still unclear.Exploring the correlation between natural killer cells and cuproptosis mechanism in Alzheimer’s disease patients through bioinformatics can provide a new direction for the study of the occurrence and development of Alzheimer’s disease.OBJECTIVE:To screen the key genes related to cuproptosis of natural killer cells in peripheral blood of patients with Alzheimer’s disease by bioinformatics analysis and verify them in clinical specimens.METHODS:The GEO online database was used to screen the transcriptome differentially expressed genes and natural killer cell related genes in the peripheral blood of patients with Alzheimer’s disease,and intersected with the reported cuproptosis factors.Differentially expressed cuproptosis-related genes were obtained.Then RT-qPCR technology was used to verify the relative gene expression levels.The experimental samples were all from peripheral blood of hospitalized patients in the Department of Neurology of Anhui Provincial Hospital from 2021 to 2023,and 30 patients in the disease group and 20 in the control group were included according to the inclusion and exclusion criteria.The protein-protein interaction network was further constructed using the online GeneMANIA website.R language was used for immune infiltration analysis.Transcription factor prediction was conducted based on ENCODE database.RESULTS AND CONCLUSION:(1)The differential expression genes of peripheral blood transcriptome of Alzheimer’s disease patients in GSE63060 data set,natural killer cell related genes in GSE168522 data set,and reported cuproptosis genes were used to screen and obtain four differentially expressed cuproptosis-related genes by using online Venn diagram tool,LASSO algorithm,and random forest machine learning methods:ferredoxin 1(FDX1),ATPase Cu^(2+) transporting alpha polypeptide(ATP7A),pyruvate dehydrogenase El subunit beta(PDHB),and dihydrolipoamide succinyltransferase(DLST).(2)Clinical sample experiment

关 键 词：阿尔茨海默病 生物信息学 NK细胞 铜死亡 FDX1 ATP7A PDHB DLST 

分 类 号：R452[医药卫生—治疗学] R318[医药卫生—临床医学] R741