核仁素表达量增高与宫颈鳞癌和宫颈上皮内瘤变的病理分级正相关

Nucleolin expression is correlated with carcinogenesis and progression of cervical squamous cell carcinoma

目的比较核仁素在宫颈鳞癌、宫颈上皮内瘤变和正常宫颈组织表达的差异,探讨核仁素表达增高在宫颈鳞癌发生发展中的作用。方法用免疫组化检测50例宫颈鳞癌、65例宫颈上皮内瘤变和正常宫颈组织中核仁素的表达,比较核仁素在3种组织中表达的差异,并分析核仁素表达水平与宫颈鳞癌和宫颈上皮内瘤变病理分级的关系。结果宫颈鳞癌核仁素阳性表达率显著高于宫颈上皮内瘤变和正常宫颈组织,宫颈上皮内瘤变核仁素阳性表达率显著高于正常宫颈组织,P<0.01。Allred免疫组化半定量评分显示,核仁素表达量在宫颈鳞癌组织(7.6±0.3)显著高于宫颈上皮内瘤变(6.1±0.2)和正常宫颈组织(3.0±0.2),P<0.01。在宫颈上皮内瘤变显著高于正常宫颈组织,P<0.01。核仁素表达量在中-低分化宫颈鳞癌(7.9±0.1)显著高于高分化鳞癌(7.0±0.2),在高级别上皮内瘤变(6.0±0.1)显著高于低级别上皮内瘤变组织(4.0±0.2),P<0.01。结论宫颈鳞状上皮在癌变过程中核仁素表达量增高,核仁素表达量增高与宫颈鳞癌和宫颈上皮内瘤变的病理分级呈正相关。

Objective To investigate the differential expressions of nucleolin in invasive cervical squamous cell carcinoma,cervical intraepithelial neoplasms（CIN） and normal cervical epithelial tissues and explore the role of nucleolin in the carcinogenesis and progression of cervical squamous cell carcinoma. Methods Fifty specimens of invasive cervical squamous cell carcinoma, 65 specimens of CIN, and 60 adjacent normal cervical epithelial tissue specimens were examined immunohistochemically for nucleolin expression. The correlation of nucleolin expression levels with histological grades of invasive cervical squamous cell carcinoma and CIN were analyzed. Results The specimens of invasive cervical squamous cell carcinoma showed a significantly higher positivity rate for nucleolin expression than CIN and normal cervical epithelial tissues, and the rate in CIN tissues was significantly higher than that in normal cervical epithelial tissues（P〈0.01）. The expression level of nucleolin was significantly higher in invasive cervical squamous cell carcinoma than in CIN and normal cervical epithelia tissues, and higher in CIN than in normal cervical epithelia tissues, whose immunostaining scores were 7.6±0.3, 6.1 ± 0.2, and 3.0 ± 0.2, respectively（P〈0.01）. The mean nucleolin immunostaining score was significantly higher in poorly and moderately differentiated than in highly differentiated cervical squamous cell carcinoma（7.9 vs 7.1, P〈0.01）, and higher in high grade CIN than in low grade CIN tissues（6.0 vs 4.0, P〈0.01）. Conclusions Overexpression of nucleolin plays an important role during carcinogenesis of cervical squamous cell carcinoma and is positively correlated with tumor progression of CIN and cervical squamous cell carcinoma.