转化生长因子β1及其受体以及Smad4和Smad7在胃癌组织表达的临床病理学意义  被引量:3

The clinicopathological significance of transforming growth factor-β1, transforming growth factor-β1 receptor Ⅱ, Smad4 and Smad7 protein expressions in gastric carcinoma

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作  者:玄延花[1] 张凤艳[1] 林贞花[2] 

机构地区:[1]延边大学基础医学院病理学教研部,吉林省延吉市133000 [2]长白山生物功能因子省部共建教育部重点实验室

出  处:《中国综合临床》2009年第10期1009-1013,共5页Clinical Medicine of China

基  金:国家教育部“新世纪优秀人才支持计划”基金;国家教育部留学回国人员科研启动基金[教外司留(2007)1108号]资助项目

摘  要:目的探讨转化生长因子β1(TGF-β1)及其受体(TGF-βRⅡ)和Smad4、Smad7蛋白在胃癌组织中表达的临床病理学意义。方法采用免疫组织化学方法检测109例胃癌、28例高度不典型增生、20例低度不典型增生、30例慢性萎缩性胃炎、29例肠上皮化生和21例正常对照的胃黏膜组织中TGF-β1、TGF.pRⅡ、Smad4和Smad7蛋白的表达变化。结果在胃癌和不典型增生组织中TGF-β1TGF-βRⅡ/和Smad7蛋白表达均明显高于慢性萎缩性胃炎、肠上皮化生和正常胃黏膜组织(P均〈0.001)。而Smad4蛋白在高度和低度不典型增生组织中虽呈高表达状态(细胞质染色分数分别为4.89±2.38、5.80±1.54;细胞核染色分数分别为3.89±1.52、3.80±1.33),但在胃癌组织中其表达水平(细胞质染色分数为2.41±2.27、核染色分数为2.02±2.14)又明显降低(P均〈0.001)。在胃癌组织中TGF-β1、TGF-βRⅡ和Smad7蛋白的表达在进展期胃癌(分别为4.36±2.66、3.05±1.93、4.84±3.06)高于早期胃癌(分别为2.93±1.85、2.17±1.87、4.14±2.46),差异均有统计学意义(P〈0.01,P〈0.05,P〈0.05),而Smad4蛋白的表达则在早期胃癌中表达更高(P〈0.001)。同时,Smad4蛋白表达与肿瘤的大小(P〈0.05)、淋巴结转移(P〈0.001)、组织学分期(T分期)(P〈0.001)和临床分期(P〈0.001)均有关系,而TGF-βRⅡSmad4蛋白的表达则与患者的5年生存率有密切关系(P〈0.05,P〈0.01)。在蛋白表达相关性上,TGF-β1蛋白表达与TGF-βRⅡ和Smad7蛋白表达之间存在正相关性(1=0.45,P〈0.05;r2=0.49,P〈0.05),而与Smad4蛋白的表达呈负相关(r=-0.21,P〈0.05)。结论TGF-β1、TGF-βRⅡSmad4和Smad7蛋白共同参与胃癌的形成,且Smad4蛋白是TGF-β信号传导通路中的最关键因素。四种蛋白的检测对反映胃癌的侵袭�Objective To investigate the clinicopathological significance of transforming growth factor-β1 ( TGF-β1 ), transforming growth factor-β1 receptor Ⅱ( TGF-βRⅡ ), Smad4 and Smad7 protein expressions in gastric carcinomas. Methods 109 cases of gastric carcinomas,28 of high grade dysplasia,20 of low grade dysplasia,30 of chronic atrophic gastritis ,29 of intestinal metaplasia, and 21' of normal gastric mucosa were selected for the detection of the expression level of TGF-β1 ,TGF-βRⅡ , Smad4 and Smad7 proteins by immunohistochemistry. Results The expression of TGF-β1, TGF-βRⅡ and Smad7 proteins in gastric carcinomas and dysplasia ( high and low grade) were significantly higher than those in chronic atrophic gastritis,intestinal metaplasia and normal gastric mucosa ( all P 〈 0.001 ), whereas the expression of Smad4 was significantly increased in high and low grade dysplasia (cytoplasmic IS:4.89 ±2.38,5.80 ± 1.54 ,respectively; nuclear IS:3.89 ± 1.52,3.80 ± 1.33, respectively) ,and decreased in gastric carcinomas ( cytoplasmic IS :2.41 ± 2.27, nuclear IS : 2.02 ± 2. 14 ) ( P 〈 0. 001, P 〈 0. 001, respectively). Meanwhile, the expressions of TGF-β1, TGF-βRⅡ and Smad7 were higher in advanced gastric cancer (4.36 ± 2.66,3.05 ± 1.93,4.84 ± 3.06, respectively) than those in early gastric cancer (2.93 ± 1.85,2. 17 ± 1.87, 4.14 ± 2.46, respectively) ( P 〈 0.01, P 〈 0.05, P 〈 0.05, respectively ) ; however the expression of Smad4 protein was much higher in early gastric cancer (P 〈 0.001 ). The expression of Smad4 protein was significantly correlated with tumor size( P 〈 0.05 ), lymph node metastasis ( P 〈 0. 001 ), T stage ( P 〈 0. 001 ) and clinical stage ( P 〈 0. 001 ),and the expressions of TGF-βRⅡ and Smad4 proteins were correlated with patients' 5-year survival rate ( P 〈 0.05,P 〈 0.01 ). TGF-β1 showed the positive correlation with TGF-βRⅡ and Smad7 ( r1 = 0.45, P 〈 0.05 ; r2 =0.4

关 键 词:胃癌 转化生长因子Β1 转化生长因子受体 SMAD4 SMAD7 

分 类 号:R735.2[医药卫生—肿瘤] R656.4[医药卫生—临床医学]

 

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