AIM:To study the HER-2/neu protein expression and gene amplification in gastric carcinoma and their relation.METHODS:One hundred and forty-five formalin-fixed and paraffin-embedded tumor tissue samples from Chinese ga...AIM:To study the HER-2/neu protein expression and gene amplification in gastric carcinoma and their relation.METHODS:One hundred and forty-five formalin-fixed and paraffin-embedded tumor tissue samples from Chinese gastric carcinoma patients were studied with immunohistochemistry(IHC)and fluorescence in situ hybridization(FISH)methods.Clinicopathologic data about all patients were collected.RESULTS:The levels of HER-2 3+,HER-2 2+and HER21+were measurable in 6.9%,8.3%and 17.2%of the samples,respectively.No HER-2 was stained in 67.6% of the samples.FISH showed that HER-2 gene was amplified in 18 samples,10 HER-2 3+samples,5 HER-2 2+samples,and 3 HER-2 1+samples with IHC staining.HER-2 status was not correlated with the sex and age of patients,and tumor size,location or differentiation,but with the depth of invasion,TNM stage,lymph node and distant metastasis as well as histopathological classification of gastric cancer(P<0.05).CONCLUSION:All samples with IHC as HER-2 expression should be analyzed with FISH.Detection of HER-2 gene amplification can assess the malignant biological behaviors and prognosis of gastric cancer.展开更多
目的探讨免疫组化(immunohistochemistry,IHC)法检测胃癌HER-2蛋白表达和荧光原位杂交(fluorescence in situ hybridization,FISH)法检测HER-2基因扩增的临床意义。方法收集256例胃癌患者手术切除及胃镜活检的胃癌组织标本,分别采用IHC...目的探讨免疫组化(immunohistochemistry,IHC)法检测胃癌HER-2蛋白表达和荧光原位杂交(fluorescence in situ hybridization,FISH)法检测HER-2基因扩增的临床意义。方法收集256例胃癌患者手术切除及胃镜活检的胃癌组织标本,分别采用IHC法及FISH法检测胃癌组织HER-2蛋白表达及基因扩增状态,并对结果进行统计学分析。结果 256例胃癌组织标本中,有26例HER-2蛋白表达阳性,阳性率为10.16%;46例HER-2基因有扩增,阳性率17.97%。26例HER-2蛋白表达(3+)的标本中,24例有HER-2基因扩增,2例无扩增;95例HER-2蛋白表达(2+)的标本中,20例有基因扩增,75例无扩增;90例HER-2蛋白表达(1+)的标本中,2例有基因扩增,88例无扩增;45例HER-2蛋白表达(0)的标本中,HER-2基因均无扩增。IHC法和FISH法检测HER-2表达阳性率差异无统计学意义(P>0.05)。结论 IHC法检测胃癌HER-2蛋白表达可作为临床治疗的初筛,HER-2蛋白表达(2+)的患者应常规行FISH法,以确定HER-2基因扩增状态。FISH法检测结果具有较高的稳定性和可靠性,联合IHC法可更准确和客观评价胃癌预后,并指导临床选用靶向药物治疗。展开更多
基金Supported by National Natural Science Foundation of China, No.81071888
文摘AIM:To study the HER-2/neu protein expression and gene amplification in gastric carcinoma and their relation.METHODS:One hundred and forty-five formalin-fixed and paraffin-embedded tumor tissue samples from Chinese gastric carcinoma patients were studied with immunohistochemistry(IHC)and fluorescence in situ hybridization(FISH)methods.Clinicopathologic data about all patients were collected.RESULTS:The levels of HER-2 3+,HER-2 2+and HER21+were measurable in 6.9%,8.3%and 17.2%of the samples,respectively.No HER-2 was stained in 67.6% of the samples.FISH showed that HER-2 gene was amplified in 18 samples,10 HER-2 3+samples,5 HER-2 2+samples,and 3 HER-2 1+samples with IHC staining.HER-2 status was not correlated with the sex and age of patients,and tumor size,location or differentiation,but with the depth of invasion,TNM stage,lymph node and distant metastasis as well as histopathological classification of gastric cancer(P<0.05).CONCLUSION:All samples with IHC as HER-2 expression should be analyzed with FISH.Detection of HER-2 gene amplification can assess the malignant biological behaviors and prognosis of gastric cancer.