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1、PTEN、VEGF-C和VEGFR-3在胃癌组织中的表达及临床意义【摘要】目的:研究PTEN基因(phosphataseandtensinhomologdeletedonchromosometen)、血管内皮生长因子-C(vascularendotnelialgrowthfactorC,VEGF-C)和血管内皮生长因子受体-3(vascularendotnelialgrowthfactorreceptor3,VEGFR-3)在胃癌及正常胃组织中的表达,探讨其在胃癌的发生、发展、浸润和转移中的作用。方法:选择临床病理资料齐全的胃癌蜡
2、块标本54例,采用免疫组织化学SP法检测PTEN、VEGF-C和VEGFR-3在其中的表达。另取正常胃黏膜标本15例为对照组。采用χ2检验和相关分析。结果:胃癌组织中PTEN低表达,且在肿瘤浸润深、有淋巴转移、临床分期高、病理分化低时降低;VEGF-C高表达,且在肿瘤直径大、肿瘤浸润深、有淋巴转移、临床分期高、病理分化低时增高;VEGFR-3高表达,且肿瘤直径大、肿瘤浸润深、有淋巴转移、临床分期高时升高。胃癌组织中VEGF-C与VEGFR-3的表达呈正相关,PTEN与VEGF-C、VEGFR-3的表达均呈负相关(P<0.05)。结
3、论:检测PTEN、VEGF-C和VEGFR-3在胃癌组织中的表达情况对胃癌的诊断、预防和预后判断有指导意义。【关键词】胃肿瘤PTEN血管内皮生长因子免疫组织化学【ABSTRACT】Objective:ToStudytheexpressionofPTEN,VEGF-CandVEGFR-3ingastriccancerandnormalgastrictissues.13Methods:Fifty-fourcasesofgastriccarcinomaspecimenswereselectedwithfullclinicopatholo
4、gicaldata,andanother15casesofnormalgastricmucosaspecimenswereselectedasthecontrol.S-PimmunohistochemistrywasusedtomeasuretheexpressionofPTEN,VEGF-CandVEGFR-3.Thedatawerestatisticallyanalyzedbyχ2testandrelativeanalysis.Results:TheexpressionofPTENingastriccancerswaslowa
5、ndreducedwithincreasedinvasivedepthclinicalstages,histologicaldifferentiationandoccurringoflymphaticmetastasis.TheexpressionofVEGF-Cingastriccancerswashighandincreasedwithincreaseddiameteroftumor,invasivedepth,clinicalstageshistologicaldifferentiation,andoccurringofly
6、mphaticmetastasis.TheexpressionofVEGFR-3ingastriccancerswashigh,andincreasedwithincreaseddiameteroftumor,invasivedepthandclinicalstages,andoccurringoflymphaticmetastasis.TheexpressionofVEGF-CandVEGFR-3wereofpositivecorrelation,andPTENandVEGF-C,PTENandVEGFR-3wereofinve
7、rselycorrelationingastriccancers.Conclusion:TheexpressionofPTEN,VEGF-CandVEGFR-3ingastriccanersmightbeusefultoestimatetheprevention,diagnoses,therapyandprognosisofgastriccancer.13【KEYWORDS】Gastriccancer·PTEN·VEGF·Immunohistochemistry胃癌的发生发展是一个多因素、多步骤、多机制的复杂过程。PTEN基因(p
8、hosphataseandtensinhomologdeletedonchromosometen)具有双特异性磷酸酶(dualspecificityphosphatase,DSPs)活性,通过诱导细胞周期阻滞和细胞凋亡等抑制肿瘤发生发展,并多途径地