【摘要】 目的 :探讨胃癌及癌前病变中核因子 kappaB(NF κB)和端粒酶逆转录酶 (hTERT)的表达及相互关系。方法 :以 4 1例原发性胃癌和 38例相应非癌组织及 10例正常对照为研究对象 ,采用免疫组化和原位杂交法检测NF κB亚单位 p6 5蛋白、hTERT蛋白和hTERTmRNA。 结果 :①正常胃粘膜、肠型化生、异型增生、胃癌中 ,p6 5的阳性率分别为 0、34 18%、5 3 33%、6 0 98% ;hTERTmRNA为 10 0 0 %、39 13%、6 6 6 7%、85 37% ;hTERT蛋白为 0、30 4 3%、6 0 0 0 %、78 0 5 %。三者在异型增生、胃癌中与正常组相比差异分别有显著性 ,而且肠化与胃癌组比较也分别具有显著性 (P <0 0 5 )。②胃癌中 ,p6 5和hTERT蛋白的表达在低、未分化、进展期、有淋巴结转移和浸润至浆膜层的肿瘤中显著增高 (P <0 0 1～ 0 0 5 )。而hTERTmRNA的表达仅与肿瘤分期相关。③肠化、异型增生和胃癌三组中 ,p6 5和hTERTmRNA ,及hTERT蛋白和mRNA间分别具有中到强正相关 (rs=0 6 0 9～ 0 75 2 ,P <0 0 1)。结论 :NF κBp6 5蛋白和hTERT的过表达是胃癌发生中的早期事件 ,其表达水平随着胃癌恶性程度的增加而增加 ;p6 5在转录水平上激活hTERT可能是胃癌发生发展的重要阶段。更多还原

【Abstract】 Purpose:To investigate the variant expression of human belomerase reverse transcriptase (hTERT) and NF κB p65 protein and their relationships in gastric carcinogenesis.Methods:A total of 41 primary gastric cancers, 15 cases dysplasia, 23 cases intestinal metaplasia and 10 cases normal gastric mucosa were taken into this study. Expression of hTERTmRNT, hTERT protein and p65 protein were determined by in situ hybridization and immunohistochemistry. Results:①Among normal mucosa intestinal metaplasia dysplasia carcinoma,p65 expression were 0?34.18%(8/23)?53.33%(8/15)?60.98%(25/41),hTERTmRNA 10.00%(1/10)?39.13%(9.23)?66.67%(10/15)?85.37%(35/41) and hTERT protein 0?30.43%(7/23)?60.00%(9/15)?78 05%(32/41),respectively. All the three parameters were significantly increased in dysplasia and carcinoma, compared to normal mucosa, while the expression level were also significantly higher in carcinoma than in intestinal metaplasia ( P <0 05).②The expression of p65 and hTERT protein were significantly increased in the poorly differentiated carcinoma, lymph node metastasis, advanced carcinoma and those which had invaded into the serosa ( P <0 01～0 05). hTERT mRNA expression was significantly higher only in advanced carcinoma. ③There were moderate or intense relationships between p65 and hTERT mRNT (r s=0.661～0.752, P <0 01),hTERT protein and mRNA(r s=0.609～0.750, P <0 01),respectively. Conclusions:NF κBp65 and hTERT expression are up regulated at an early stage of gastric carcinogenesis. NF κB may contribute to the activation of hTERT expression and thereby enhance telomerase activity representing an important step in carcinogenesis progress.更多还原