胃癌Lauren分型中癌相关成纤维细胞分泌因子的差异表达  

Different Lauren subtypes of gastric cancer exhibit differential expression of factors secreted by cancer-associated fibroblasts

作　　者：琚璐 任国涛 郑诗祺 孙也淇 蔡磊 王瑞芬[1] 王立峰[1] Ju Lu;Ren Guotao;Zheng Shiqi;Sun Yeqi;Cai Lei;Wang Ruifen;Wang Lifeng(Department of Pathology,Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine,Shanghai 200092,China;Department of Pathology,Shandong Provincial Hospital,Shandong First Medical University,Jinan 250021,China)

机构地区：[1]上海交通大学医学院附属新华医院病理科,上海200092 [2]山东第一医科大学附属省立医院病理科,济南250021

出　　处：《临床与实验病理学杂志》2025年第3期324-333,共10页Chinese Journal of Clinical and Experimental Pathology

基　　金：上海市卫健委面上项目(202340043)。

摘　　要：目的探讨胃癌Lauren分型中弥漫型胃癌相关成纤维细胞(diffuse-type gastric cancer-associated fibroblasts,DGC-CAFs)和肠型胃癌相关成纤维细胞(intestinal-type gastric cancer-associated fibroblasts,IGC-CAFs)分泌因子的表达差异。方法选取手术切除的6例胃癌新鲜标本,其中弥漫型胃癌(diffuse-type gastric cancer,DGC)和肠型胃癌(intestinal-type gastric cancer,IGC)各3例,分别提取DGC-CAFs、IGC-CAFs原代细胞以获得条件培养基,采用高效液相色谱-质谱联用法(high performance liquid chromatography-tandem mass spectrometry,HPLC-MS/MS)检测DGC-CAFs与IGC-CAFs分泌因子的表达;根据HPLC-MS/MS结果,选择3个差异因子进行免疫组化检测,研究两者在DGC和IGC配对标本中的表达差异;收集GEO和TCGA数据库中1174个胃癌转录组数据,通过ESTIMATE获取基质细胞的分布并对DGC和IGC进行基质评分,应用Kaplan-Meier生存分析研究高基质评分和癌相关成纤维细胞(cancer-associated fibroblasts,CAFs)比例与预后的关系,运用GO富集进行基因和生物学功能分析。结果HPLC-MS/MS分析显示,在DGC-CAFs和IGC-CAFs中均检测到的蛋白仅有10种,即SPARC、COL6A1、COL1A2、COL1A1、COL3A1、FN1、DCN、ACTG1、TIMP1和SHROOM3。在DGC-CAFs中10种蛋白表达均高于IGC-CAFs,且比值>2的蛋白为COL3A1(5.28)、COL1A2(3.98)、DCN(3.71)、TIMP1(3.40)、COL6A1(3.35)、ACTG1(3.13)、COL1A1(2.84)和SHROOM3(2.50)。3例DGC-CAFs中均检测到TUBB和BASP1,1例IGC-CAFs中检测到TUBB,3例IGC-CAFs中均未检测到BASP1。免疫表型:DCN、ACTG1和COL3A1在DGC中的表达高于IGC,与HPLC-MS/MS分析一致。生信分析显示,DGC的基质评分高于IGC,与预后差相关。分析细胞组分发现,相关基因富集在ECM、含胶原的ECM和细胞-细胞连接处,其相关分子功能和生物学过程也以该组分为基础,与HPLC-MS/MS分析一致。结论DGC-CAFs和IGC-CAFs的分泌因子在种类、含量上均存在差异,其差异多集中在ECM相关的信号通路上;基质中�Purpose To investigate the differential expression of proteins secreted by diffuse-type gastric cancer-associated fibroblasts(DGC-CAFs)and intestinal-type gastric cancer-associated fibroblasts(IGC-CAFs)according to Lauren classification of gastric cancer.Methods Fresh surgery samples were acquired to extract primary cancer-associated fibroblasts(CAFs)to obtain the conditional medium,including three cases of diffuse-type gastric cancer(DGC)and three cases of intestinal-type gastric cancer(IGC).Then high performance liquid chromatography-tandem mass spectrometry(HPLC-MS/MS)was used to detect the differences in secreted factors between DGC-CAFs and IGC-CAFs.Additionally,a total of 1174 cases were collected from the GEO and TCGA databases,and the distribution of stromal cells was assessed via ESTIMATE to derive stromal scores for both DGC and GC.Furthermore,Kaplan-Meier survival analysis was performed to evaluate the relationship between high stromal scores,elevated CAFs proportions,and patient prognosis.Subsequently,GO enrichment analysis was performed to investigate associated genes and their biological functions.Results HPLC-MS/MS analysis showed that only 10 proteins were identified to be expressed in both DGC-CAFs and IGC-CAFs,namely SPARC,COL6A1,COL1A2,COL1A1,COL3A1,FN1,DCN,ACTG1,TIMP1 and SHROOM3.There were 8 proteins expressed higher in DGC-CAFs than IGC-CAFs in all cases with ratio>2,namely COL3A1(5.28),COL1A2(3.98),DCN(3.71),TIMP1(3.40),COL6A1(3.35),ACTG1(3.13),COL1A1(2.84)and SHROOM3(2.50).Two other proteins,TUBB and BASP1,were identified in all three cases of DGC-CAFs.The former was only identified in one case of IGC-CAFs,while the latter was not identified in all three cases of IGC-CAFs.The results of bioinformatics analysis showed that the stromal score of DGC was higher than IGC,which correlated with poor prognosis.Analysis of cell components revealed that the related genes were more enriched in ECM,collagen-containing extracellular matrix and cell-cell junction.Also,the biological process and molecula

关 键 词：胃肿瘤 Lauren分型 癌相关成纤维细胞 高效液相色谱-质谱联用 分泌因子 

分 类 号：R735.2[医药卫生—肿瘤]