乙酰肝素酶在食管鳞状细胞癌组织中的表达与意义

目的探讨乙酰肝素酶在食管鳞状细胞癌(ESCC)组织中的表达及其与ESCC临床病理特征间的关系。方法应用RT-PCR和免疫组化方法检测55例ESCC术后组织标本及相应癌旁组织中乙酰肝素酶的表达,分析乙酰肝素酶表达与ESCC临床病理特征的关系。结果ESCC组织中存在乙酰肝素酶基因的表达,并定位于肿瘤细胞质和(或)细胞膜中。55例ESCC组织中有40例乙酰肝素酶基因mRNA表达阳性(40/55,72.7%),癌旁组织有19例表达阳性(19/55,34.5%),两组间差异有显著性(P<0.01)。免疫组化染色ESCC组织中乙酰肝素酶阳性率63.6%(35/55),癌旁组织阳性率21.8%(12/55),两组间差异有显著性(P<0.01)。乙酰肝素酶基因mRNA和蛋白质的检测均显示有淋巴结转移的癌组织乙酰肝素酶表达高于无淋巴结转移组,TNM分期Ⅲ~Ⅳa的癌组织表达高于Ⅰ~Ⅱ组,均有统计学意义。结论ESCC组织乙酰肝素酶基因及蛋白表达高于正常组织,并且与ESCC的转移和进展有密切关系。     

肾细胞癌乙酰肝素酶的表达及其临床意义

目的:探讨乙酰肝素酶在肾细胞癌组织、癌旁正常肾组织中的表达及其与肾癌病理分型、临床分期、淋巴结转移和静脉癌栓形成的关系。方法:采用免疫组化法检测103例肾细胞癌患者原发癌组织、癌旁正常组织、转移性淋巴结、静脉癌栓中乙酰肝素酶蛋白的表达,并结合肾癌的病理类型、临床分期及肿瘤转移进行分析。结果:乙酰肝素酶蛋白在肾细胞癌组织中的阳性表达率为67.0%,显著高于癌旁正常组织(8.7%),低于转移性淋巴结(85.7%)和静脉癌栓(84.6%)。Ⅰ、Ⅱ期患者乙酰肝素酶蛋白的阳性表达率为64.0%,与Ⅲ、Ⅳ期患者(69.8%)比较无显著性差异。肾透明细胞癌患者乙酰肝素酶表达阳性率为64.9%,与肾乳头状癌(73.1%)比较无显著性差异。结论:乙酰肝素酶在肾细胞癌组织中呈高表达,在癌旁正常肾组织中呈低表达,癌组织发生转移后乙酰肝素酶的表达明显上调,提示乙酰肝素酶可能与肾癌的浸润转移相关。     

结直肠癌组织中肝素酶mRNA基因表达及其临床意义

目的:探讨结直肠癌组织中肝素酶mRNA表达及其与结直肠癌临床病理参数的关系。方法:采用逆转录聚合酶链反应(RT-PCR)及原位杂交技术检测62例结直肠癌组织及41例癌旁组织中肝素酶mRNA的表达。结果:肝素酶mR-NA在结直肠癌组织中的阳性表达明显高于癌旁组织(P<0·05),且其表达与结直肠癌Dukes分期、淋巴结转移有关(P<0·05)。结论:肝素酶促进了结直肠癌的生长、浸润及转移,与预后不良的病理特征有关。     

乙酰肝素酶基因表达与胃癌临床病理特点的关系

目的探讨乙酰肝素酶基因(HPAmRNA)在胃癌中的表达及其与临床病理因素之间的相互关系。方法选用43例胃癌组织和10例癌旁正常胃组织,用逆转录聚合酶链反应(RTPCR)检测标本中HPAmRNA的表达,并结合患者临床病理指标进行分析。结果43例胃癌中,29例HPAmRNA表达阳性,其阳性率显著高于癌旁正常胃组织(P=0.013)。HPAmRNA的表达与TNM分期、有无浆膜浸润、淋巴结转移、远处转移以及与肿瘤大小有相关性(P<0.05);与患者年龄、性别、肿瘤所在部位、肿瘤的Borrmann分型、组织学类型、分化程度、腹膜转移和肝转移无相关性(P>0.05)。结论HPAmRNA阳性表达的胃癌有较高的侵袭转移性,HPA可能是胃癌侵袭转移中的一个重要酶,可能与胃癌的淋巴结转移有关。     

膀胱癌乙酰肝素酶mRNA的表达检测及其意义

目的 探讨膀胱癌乙酰肝素酶mRNA的表达水平及其与膀胱癌发生、发展和转移的关系.方法 应用荧光定量逆转录聚合酶链式反应检测研究28例膀胱癌和癌旁正常组织中乙酰肝素酶mRNA的表达水平.结果 乙酰肝素酶mRNA在膀胱癌中阳性表达13例(46.4%),其表达率和表达量与肿瘤的病理分级、临床分期和淋巴结转移有相关性(P<0.05).结论 乙酰肝素酶与膀胱癌的浸润和转移有关,可成为膀胱癌发生和发展的预后参数.     

胃癌和癌旁组织CD40表达及其生物学意义

[目的]研究CD40及其mRNA在胃癌和癌旁正常组织中的表达.[方法]应用免疫组化技术检测56例胃癌组织和32例癌旁正常组织中CD40分子表达,采用RT-PCR法分别检测¨例胃癌和癌旁正常组织中CD40mRNA的表达.[结果]免疫组化检测显示CD40分子在胃癌组织中的阳性表达率为33.9%(19/56),与癌旁正常组织(6.3%)相比,差异有显著性(P＜0.01);RT-PCR检测发现CD40mRNA在胃癌组织中的阳性表达率为72.7%,在癌旁正常组织中无表达.CD40和CD40mRNA阳性表达均与淋巴结转移及远处转移有关,与肿瘤大小、分化程度、浸润深度无关.[结论]检测胃癌组织中CD40及其mRNA有助于胃癌诊断、预后评价.     

FAF1 mRNA在人胃癌组织中的表达及其临床意义

目的:分析FAF1 mRNA的表达水平与胃癌临床指标的关系。方法:用荧光实时定量聚合酶链反应(Real time PCR)技术定量检测40例胃癌患者癌组织、癌旁组织及正常组织中FAF1 mRNA的表达情况。结果:FAF1 mRNA在癌组织中的表达水平(0.27±0.12)明显低于癌旁(0.40±0.06)和正常组织(0.48±0.08)(P<0.01)。FAF1 mRNA在胃癌中的表达水平与癌细胞分化程度、远处转移有关,而与年龄、性别、浸润深度、临床分期、有无淋巴结转移及肿瘤大小无关。结论:FAF1可能与胃癌的发生与发展有关。FAF1异常表达在胃癌细胞分化过程中可能发挥重要作用。     

甲状腺素受体β1在胃癌组织中的表达及其意义

目的:研究甲状腺素受体β1(thyroidhormonereceptorβ1,THRβ1)在胃癌组织中的表达及其与临床病理因素之间的相互关系。方法:选用61例胃癌组织和10例癌旁正常组织,应用RTPCR琼脂糖凝胶电泳溴化乙锭染色法检测标本中THRβ1mRNA表达的变化,并结合患者临床病理指标进行分析。结果:THRβ1在61例胃癌组织中,20例表达呈阳性,阳性表达率为32.6%(20/61);而在10例癌旁正常胃组织中9例表达呈阳性,阳性表达率为90%(9/10)。在胃癌组织中的表达率明显低于邻近正常胃黏膜,P=0.002。THRβ1mRNA的低表达与患者的年龄、性别、肿瘤所在部位、肿瘤的BORRMANN分型、组织学类型、分化程度无关,P>0.05。与肿瘤大小,腹膜转移、肝转移、有无浆膜浸润、淋巴结转移、TNM分期、远处转移有关,P<0.05。结论:THRβ1mRNA的低表达在胃癌的发生中起一定作用,并且与胃癌的侵袭转移有关。     

胃癌组织中肝素酶mRNA的表达

目的探讨肝素酶mRNA在胃腺癌组织中的表达情况及其与临床病理学参数的关系。方法采用半定量RT-PCR检测36例胃腺癌组织及11例正常胃黏膜组织中肝素酶mRNA表达水平。结果HPAmRNA阳性表达与胃癌的浆膜浸润和淋巴结转移成正相关(P<0·05),与胃癌患者的性别、年龄、大体类型及肿瘤发生部位无关(P>0·05)。结论HPA可能是胃癌侵袭转移的重要生物学标记,并可作为判断胃癌预后的指标之一。     

环氧化酶-2基因和蛋白在人胃癌组织中的表达及临床意义

目的:研究环氧化酶-2(COX-2)基因和蛋白在人胃癌组织中的表达及其与临床病理特征之间的关系.方法:应用逆转录-聚合酶链反应(RT-PCR)技术,检测了47例胃癌患者的癌组织及配对的癌旁组织、11例远离肿瘤的正常胃粘膜组织中COX-2 mRNA的表达,同时应用免疫组织化学技术检测COX-2蛋白的表达.结果:COX-2mRNA在72.3%(34/47)的胃癌组织中表达显著增高(0.619±0.033),癌旁组织表达也增高(0.175±0.084),在正常胃粘膜组织中几乎不表达,癌组织与癌旁组织、正常胃粘膜组织COX-2 mRNA的表达差异有显著性意义.免疫组织化学结果显示70.2%(33/47)的胃癌组织COX-2蛋白呈阳性表达,58.3%(27/47)癌旁组织COX-2蛋白呈不同程度阳性表达,两者比较差异有显著意义,正常胃粘膜组织未见COX-2蛋白表达.胃癌的COX-2过度表达与其淋巴结的转移和临床分期密切相关,而与组织学类型和浸润深度无明显相关.结论:COX-2 mRNA和蛋白表达在人胃癌组织中明显增高,并与胃癌淋巴结的转移和临床分期等临床病理特征密切相关.COX-2的过度表达在人胃癌发生发展和转移中起重要作用.     

Protein tyrosine-phosphatase expression profiling in gastric cancer tissues

Protein phosphorylation is an important regulatory mechanism involved in signal transduction and cancers. In comparison to the extensive tyrosine-kinase oncogenesis research, there are only relatively few studies of protein tyrosine-phosphatase expression in cancers. The expression profile for tyrosine-phosphatases was investigated in gastric cancers using RT-PCR and molecular cloning. The present study showed a general PTP expression profile in gastric cancer tissues, with the identification of 22 distinct tyrosine-phosphatases. Following the examination of five PTPs (PTPRA, PTPRB, PTPRD, PTPRG and PTPRZ) using immunohistochemistry, strong association was observed between PTPRA/PTPRZ expression and gastric cancer progression including lymphovascular invasion and liver/peritoneal dissemination.     

生存蛋白Survivin在人胃癌组织中的表达

目的 :探讨生存蛋白Survivin在胃癌组织中的表达 ,进一步研究化疗前后Sur vivinmRNA表达的差异。方法 :用RT PCR法研究体外培养的胃癌细胞株及人胃癌组织化疗前后SurvivinmRNA表达的变化 ,采用Western blot检测Survivin蛋白的表达。结果 :体外培养的胃癌细胞株化疗药物处理前SurvivinmRNA的表达率为 2 5 % ,接受化疗的细胞株表达率为 70 % ;术前接受化疗的胃癌患者SurvivinmRNA表达率为 60 % ,术前未接受化疗的表达率为 3 5 % ,差异显着。正常胃黏膜细胞未检测到SurvivinmRNA表达。Western blot检测Survivin蛋白的表达具有相同的结果。结论 :Survivin在胃癌细胞中高表达并且接受化疗后Survivin表达率增高 ,提示Survivin表达可能与肿瘤化疗耐受有关     

Chromogranin-A expression in gastric and colon cancer tissues.

We studied the expression of chromogranin A (CgA) in human gastric (n = 17) and colorectal (n = 18) adenocarcinomas by nucleic acid hybridization and immunohistochemical analyses using a specific monoclonal antibody (MAb) to human chromogranin A (CgA). Some corresponding adjacent non-malignant mucosal tissues were also examined. Results: (1) Northern blotting: of 3 normal gastric mucosas examined, 2 (67%) had an easily detected signal for expression of CgA. Only one of 14 gastric carcinomas (7%) and one of 18 colorectal carcinomas (6%) had easily detected RNA signals. (2) Immunohistochemical staining: all non-malignant samples of gastric and colonic mucosa contained CgA-positive neuroendocrine (NE) cells. Two of 17 (12%) gastric adenocarcinomas, and 3 of 18 (17%) of colorectal adenocarcinomas contained CgA-positive tumor cells. Interestingly, the positive cases detected by immunohistochemistry included both cases detected by Northern blotting. Of the 5 cases detected by immunohistochemistry, 2 gastric cancers and 1 rectal carcinoma contained many diffusely scattered positive cells, occurring singly or in small clusters, while 2 colorectal carcinomas contained only occasional single CgA-positive tumor cells. In one of the positive gastric cases, a well-differentiated adenocarcinoma arising in a tubular adenoma, both the adenomatous and the carcinomatous elements contained positively staining cells. Our specific assays for CgA indicate that (1) a NE cell component, either diffusely scattered or occasional, occurs in about 15% of gastric and colorectal tumors; (2) there is no correlation between the presence of NE cells and degree of tumor differentiation; and (3) because only a minority of the tumor cells in positive cases stain for CgA, immunohistochemistry is a more sensitive method than Northern blotting.     

MicroRNA profiles in five pairs of early gastric cancer tissues and adjacent non-cancerous tissues

Approximately half of the world''s gastric cancer cases and deaths occur in China. In addition, the incidence and mortality rates of gastric cancer in Gansu province in China are much higher than the average nationwide levels. The present study investigated microRNA (miRNA/miR) profiles in early gastric cancer (EGC) without specific symptoms. miRNA expression levels in five pairs of EGC tissues and adjacent non-cancerous mucosa tissues of patients from Gansu province in China were analyzed using a miRNA microarray. A total of 47 differentially expressed miRNAs (DEMs) were identified. Subsequently, mRNA expression profiles of three pairs of cancer tissues and adjacent non-cancerous tissues from 3 Asian patients with stage I or stage II gastric cancer (stage I/II; American Joint Committee on Cancer classification, Eighth Edition) were obtained from The Cancer Genome Atlas database, and differentially expressed genes (DEGs) were identified. The target genes of DEMs were filtered from the DEGs using the miRDB database and a miRNA-gene network was constructed. The functions of DEMs were evaluated using the tool for annotations of human miRNAs database, and via Gene Ontology analysis, Kyoto Encyclopedia of Genes and Genomes analysis and Gene Set Enrichment Analysis of the target genes. Finally, survival analyses of DEMs, which were in the miRNA-gene network, was performed. The results suggested that a number of miRNAs, including hsa-let-7a-5p, hsa-miR-27a-3p, hsa-miR-126-5p and hsa-miR-424-5p, may serve critical roles in EGC. The present study could provide a basis for the identification of EGC screening biomarkers. Furthermore, the present study may provide a basis for the exploration of the cause of the high incidence of gastric cancer in Gansu province from the perspective of miRNAs.     

Bag1在胃癌组织中的表达及其意义

目的:研究抗凋亡基因Bag1在胃癌组织中的表达及其与临床病理因素和预后的关系。方法:应用免疫组织化学法对62例胃癌及11例正常胃组织中Bag1基因的表达进行检测。所有的病人均电话随访。结果:胃癌组织中Bag1阳性表达率为41.9%(26/62),显著高于胃正常组织的9.1%(1/11)(P<0.05);Bag1在胃癌中的表达与性别、年龄、肿瘤直径、肿瘤发生的部位、浸润深度无关(P>0.05),但与胃癌病理分级、有无淋巴结转移及预后密切相关(P<0.05)。Bag1阳性的患者生存期短于阴性患者。结论:胃癌组织中存在不同水平Bag1基因的高表达,对胃癌的预后有重要意义。     

胃癌组织内树突状细胞的浸润及其预后意义

目的 :研究胃癌组织内树突状细胞(dendriticcell ,DC)的浸润及其对预后的影响。方法 :将S 10 0蛋白抗体作为DC特异性标记物 ,对 3 0例胃腺癌组织进行免疫组化染色和DC定量计数。结果 :高分化和低分化胃癌组织中每个高倍镜视野的阳性细胞数分别为2 1 43± 12 0 5和 10 45± 13 5 4,两组DC数量比较差异有统计学意义 ,P <0 0 5 ;有淋巴结转移组和无淋巴结转移组平均每个视野中的阳性细胞数分别为 6 90± 4 43和 15 99± 8 3 6,无淋巴结转移的DC数量明显高于淋巴结转移者 ,P <0 0 0 1;术后生存期 <5年和≥ 5年的两组DC计数分别为4 68± 3 2 9和 10 47± 7 71,P <0 0 5。结论 :胃癌组织中DC的浸润明显延长胃癌患者的生存 ,且与淋巴结转移有关 ,提示DC细胞的浸润程度可作为胃癌预后判断的指标     

Mesenchymal stem cell-like cells derived from human gastric cancer tissues

Mesenchymal stem cells (MSCs) have been identified in and isolated from numerous human tissues. The characteristics of mesenchymal stem cells, including their plasticity, the secretion of cytokines, and their low immunogenicity, contribute to their therapeutic potential. It has recently been reported that MSCs are also involved in tumorigenesis and its prognosis. Here, we present the first report of MSC-like cells isolated from human gastric cancer tissues. In our study, gastric cancer-derived MSC-like cells (hGC-MSCs) were isolated from 13 out of 20 cancer tissue samples. Their characteristics, including their morphology, surface antigens, specific gene expression, and differentiation potential, were similar to those of MSCs derived from human bone marrow (hBM-MSCs) but different from gastric cancer cells. The existence of MSC-like cells in gastric cancer tissues suggests that they may be potential targets for cancer therapy and provides an experimental foundation for investigating their role in the initiation and progression of gastric cancers.     

Bag1在胃癌组织中的表达及其意义

目的：研究抗凋亡基因Bag1在胃癌组织中的表达及其与临床病理因素和预后的关系。方法：应用免疫组织化学法对62例胃癌及11例正常胃组织中Bag1基因的表达进行检测。所有的病人均电话随访。结果：胃癌组织中Bag1阳性表达率为41.9%（26/62）,显著高于胃正常组织的9.1%（1/11）（P〈0.05）;Bag1在胃癌中的表达与性别、年龄、肿瘤直径、肿瘤发生的部位、浸润深度无关（P〉0.05）,但与胃癌病理分级、有无淋巴结转移及预后密切相关（P〈0.05）。Bag1阳性的患者生存期短于阴性患者。结论：胃癌组织中存在不同水平Bag1基因的高表达,对胃癌的预后有重要意义。     

GCS在胃癌组织中的表达及意义

目的 研究多药耐药蛋白葡萄糖神经酰胺合成酶（GCS）在胃癌组织中的表达。方法 免疫组化法检测63例胃癌组织及30例非癌性胃组织标本中GCS的表达情况,分析其与年龄、性别、组织学类型、分化程度、淋巴结转移的相关性。结果 GCS表达在胃癌组织中高于非癌性胃组织,阳性表达率分别为49.2％和23.3％（P＜0.05）;GCS表达与年龄、性别、分化程度、浸润深度、淋巴结转移均无明显相关性。结论 GCS蛋白在胃癌组织中存在高表达,可能是引起胃癌原发性多药耐药的因素之一。