食管鳞状细胞癌组织中核干细胞因子蛋白和mRNA的半定量表达

目的 探讨食管鳞状细胞癌组织中核干细胞因子(NS)蛋白和mRNA的半定量表达情况.方法 应用免疫组化SABC法和逆转录聚合酶链反应(RT-PCR)法,检测62例食管鳞状细胞癌组织及其相对应的31例癌旁不典型增生组织和62例正常食管黏膜组织中NS蛋白和mRNA的半定量表达情况.结果 正常食管黏膜组织、癌旁不典型增生组织和食管鳞状细胞癌组织中,NS蛋白阳性表达率分别为17.7%(11/62)、41.9%(13/31)和69.4%(43/62),组间比较,差异有统计学意义(χ2=33.676,P＜0.01).食管鳞状细胞癌组织中,NS蛋白阳性表达率与其组织学分级、侵袭程度及淋巴结转移密切相关(均为P＜0.05),而与年龄、性别和病理分型无关(均为P＞0.05).食管鳞状细胞癌组织中,NS mRNA的相对含量(0.971±0.121)高于癌旁不典型增生组织(0.913±0.085)和正常食管黏膜组织(0.866±0.103),组间比较,差异有统计学意义(F=14.829,P＜0.01).不同组织学分级、不同侵袭程度及有无淋巴结转移的食管鳞状细胞癌组织之间,NS mRNA的相对含量差异均有统计学意义(均为P＜0.05),NSmRNA的相对含量与年龄、性别和病理分型无关(均为P＞0.05).结论 食管鳞状细胞癌组织中,NS mRNA的表达升高,其高表达与食管鳞状细胞癌的发生发展有关.

Expression of nucleostemin mRNA and protein in the esophageal squamous cell carcinoma

OBJECTIVE: To investigate the mRNA and protein expression of nucleostemin (NS) in human esophageal squamous cell carcinoma. METHODS: The mRNA and protein expression of NS were detected in 31 mucosal atypical hyperplasia specimens, 62 esophageal squamous cell carcinoma specimens and the matched normal esophageal mucosa samples by RT-PCR and immunohistochemistry method, respectively. RESULTS: The positive expression rate of NS protein in normal esophageal mucosa, atypical hyperplasia and esophageal squamous cell carcinoma was 17.7% (11/62), 41.9% (13/31) and 69.4% (43/62), respectively. There was a significant difference among the above three groups (chi2 = 33.676, P < 0.01). The expression levels of NS mRNA in esophageal squamous cell carcinoma (0.971 +/- 0.121) was significantly higher than that in the atypical hyperplasia (0.913 +/- 0.085) and also in the normal esophageal mucosa (0.866 +/- 0.103; F = 14.829, P < 0.01). The expression level of both NS protein and mRNA was positively correlated with histological grade, infiltration depth, and lymph node metastasis (P < 0.05), but not with age, gender or pathological type (P > 0.05). CONCLUSION: Our results indicate that nucleostemin mRNA and protein are over-expressed in human esophageal squamous cell carcinoma, and it may be related with its oncogenesis.