应用免疫组化技术检测胃癌组织p53、c-erbB-2、p21、nm23基因表达产物及其临床意义

The clinical significance and detection of p53、c-erbB-2、p21、nm23 oncoprotein expression with immunohistochemical method in gastric cancer tissue

目的 :为探讨胃癌组织p5 3、c erbB 2、p2 1、nm2 3联合基因表达产物对胃癌诊断与治疗方面的价值。方法 :应用免疫组化技术检测了手术切除胃癌组织p5 3、c erbB 2、p2 1、nm2 3基因产物表达。结果 :p5 3蛋白表达阳性率 37 6 %～ 4 6 2 % ,c erbB 2为 34 6 %～ 5 6 8% ,p2 1为 37 8%～ 6 1 5 % ,nm2 3为 30 8%～ 70 3% ;非胃癌组织 (胃、十二指肠溃疡、胃息肉、重度不典型增生 )未见c erbB 2、p2 1、nm2 3基因表达。c erbB 2、p2 1的表达与胃癌的分化程度有关 ,p2 1、nm2 3基因表达与肿瘤浸润深度、肿瘤转移程度有关。p5 3、c erbB 2、p2 1、nm2 3四种肿瘤蛋白在胃镜活检标本和手术切除标本中表达是一致的 ,无显著性差异。结论 :对胃癌组织检测p5 3、c erbB 2、p2 1、nm2 3基因表达产物在胃部的良恶性肿瘤鉴别、非手术临床分期的判断及指导胃癌的临床诊断与治疗等方面具有一定价值。

Objective:To evaluate p53,c erbB 2,p21 and nm23 oncoprotein expression in diagnosis and treatment of gastric cancer.Methods:The expression of p53,c erbB 2,p21 and nm23 oncoproteins was detected with immunohistochemical method in 63 surgically resected specimens and its endoscopic biopsy specimens of gastric cancer.Results:The positive rates of p53,c erbB 2,p21 and nm23 oncoprotein expression were 37 6%～46 2%,34 6%～56 8%,37 8%～61 5%,70 3%～30 8% respectively.Oncoprotein expression was not observed in non tumor endoscopic biopsy specimens.The expression of c erbB 2,p21 was correlated with grade of tumor differentiation and the expression of p21,nm23 oncoproteins was correlated with the depth of tumor invasion and clinical different stage,namely tumor metastasis.Positive rates of p53,c erbB 2,p21 and nm23 oncoproteins between biopsy and resected specimens was of coincidence.Conclusion:Determination of p53,c erbB 2,p21 and nm23 oncoprotein expression was might be useful in diagnosis and treatment of gastric cancer,differentiating benign and malignant tumor and clinical stages,of gastric cancer. [