丝氨酸蛋白酶抑制因子1在胃癌中的表达及其促进胃癌发展的作用机制  

Expression of serpin family E member 1 in gastric cancer and its mechanisms in promoting gastric cancer

作　　者：陈勇羽 黄益仁 陈哲逸 周冰倩 陈诗宇 郑英霞[1] CHEN Yongyu;HUANG Yiren;CHEN Zheyi;ZHOU Bingqian;CHEN Shiyu;ZHENG Yingxia(Department of Laboratory Medicine,Xinhua Hospital,Shanghai Jiao Tong University School of Medicine,Shanghai 200092,China)

机构地区：[1]上海交通大学医学院附属新华医院检验科,上海200092

出　　处：《上海交通大学学报(医学版)》2025年第2期150-160,共11页Journal of Shanghai Jiao tong University:Medical Science

基　　金：国家自然科学基金(82071753);上海市卫生健康委员会医苑新星杰出青年人才项目(20224Z0025)。

摘　　要：目的·研究丝氨酸蛋白酶抑制因子1(serpin family E member 1,SERPINE1)在胃癌中的表达及其促进胃癌发展的潜在作用机制。方法·使用TIMER2.0在线网站对SERPINE1进行泛癌分析,通过癌症基因组图谱(The Cancer Genome Atlas,TCGA)数据库中的胃癌临床数据分析SERPINE1在不同胃癌肿瘤分期样本中的表达差异并绘制生存曲线。采用实时荧光定量PCR(quantitative real-time PCR,qRT-PCR)检测临床胃癌组织配对样本中SERPINE1 mRNA的表达情况。小干扰RNA(small interfering RNA,siRNA)转染技术敲低MGC-803、SGC-7901胃癌细胞系中SERPINE1表达,通过Transwell和Invasion小室实验检测胃癌细胞迁移、侵袭能力;进一步通过人脐静脉内皮细胞(human umbilical vein endothelial cells,HUVEC)迁移实验和小管形成实验探究敲低SERPINE1对胃癌细胞血管生成能力的影响。利用基因表达综合(Gene Expression Omnibus,GEO)数据集,根据SERPINE1的表达水平中位值分为高表达和低表达2组进行差异基因分析,并进行京都基因与基因组数据库(Kyoto Encyclopedia of Genes and Genomes,KEGG)分析和基因集富集分析(Gene Set EnrichmentAnalysis,GSEA);进一步通过qRT-PCR验证SERPINE1敲低胃癌细胞系上皮-间充质转化(epithelial-mesenchymal transition,EMT)、血管生成有关的关键基因表达水平。结果·生物信息学分析显示,SERPINE1在包括胃癌在内的多种原发肿瘤组织中高表达,SERPINE1基因表达随着肿瘤分期的增加而升高(P<0.001),SERPINE1表达增加与胃癌不良预后有关(P<0.001)。qRT-PCR结果表明SERPINE1在胃癌组织中明显高表达(P=0.038)。敲低SERPINE1后,胃癌细胞系MGC-803、SGC-7901细胞迁移和侵袭能力下降(P<0.05);敲低SERPINE1的胃癌细胞系的培养上清液能降低HUVEC细胞迁移和小管生成能力(P<0.05)。GEO数据库中SERPINE1高表达组胃癌患者差异基因富集到焦点黏附、细胞外基质受体相互作用等癌症相关通路以及血管生成、血管内皮Objective·To investigate the expression of serpin family E member 1(SERPINE1)in gastric cancer and its potential mechanisms in promoting gastric cancer.Methods·Pan-cancer analysis of SERPINE1 was performed by using the TIMER2.0 online website,and the differences in the expression of SERPINE1 in samples with different tumor stages of gastric cancer were analysed by the clinical data of gastric cancer from The Cancer Genome Atlas(TCGA)database.Survival curves were plotted.Quantitative real-time PCR(qRT-PCR)was used to detect mRNA expression in paired samples of clinical gastric cancer tissues.The small interfering RNA(siRNA)transfection technique was used to knock down the expression of SERPINE1 in MGC-803 and SGC-7901 gastric cancer cell lines,and the migration and invasive abilities of gastric cancer cells were investigated by Transwell and invasion chamber experiments.The effects of SERPINE1 knockdown on the angiogenesis of gastric cancer cells were further explored by the migration assay of human umbilical vein endothelial cells(HUVEC)and tubule formation assay of HUVECs.The Gene Expression Omnibus(GEO)dataset was used for differential gene analysis in high and low expression groups based on the median value of SERPINE1 expression.The differentially expressed genes were further analyzed by Kyoto Encyclopedia of Genes and Genomes(KEGG)analysis and Gene Set Enrichment Analysis(GSEA).qRT-PCR was performed to verify the expression levels of key genes related to epithelial-mesenchymal transition(EMT)and angiogenesis.Results·Bioinformatics analysis showed that SERPINE1 was highly overexpressed in a variety of primary tumour tissues,including gastric cancer.SERPINE1 gene expression increased with increasing tumour stage(P<0.001),and increased expression of SERPINE1 was associated with poor prognosis of gastric cancer(P<0.001).qRT-PCR results showed that SERPINE1 was significantly highly expressed in gastric cancer tissues(P=0.038).After knocking down SERPINE1,gastric cancer cell lines MGC-803 and SGC-7901 cells had

关 键 词：丝氨酸蛋白酶抑制因子1 胃癌 上皮细胞-间充质转化 血管生成 

分 类 号：R735.2[医药卫生—肿瘤]