Oct4基因在宫颈癌中的表达及其意义

Expression of Oct4 gene in cervical cancer

目的研究胚胎特异性基因Oct4在宫颈癌中的表达及其在宫颈癌发生发展中的作用。方法通过RT-PCR、免疫组织化学等方法检测Oct4基因在宫颈癌组织、宫颈癌细胞系以及原代宫颈癌肿瘤球细胞中的表达状况。结果①Oct4 mRNA在宫颈癌组织中的表达率为73.3%(22/30),显著高于正常宫颈组织中的表达率25.0%(3/12),P<0.01;②Oct4蛋白在宫颈癌组织中表达率为53.7%(22/41),显著高于正常宫颈组织中的表达率7.7%(1/13),P<0.01;③Oct4蛋白在宫颈癌细胞系Si Ha、HeLa、Caski和C33A中表达;④Oct4蛋白的表达随着宫颈癌肿瘤细胞的分化而降低。结论Oct4基因在宫颈癌中的表达增加,可能与宫颈癌干细胞有密切的关系,这还有待于进一步的研究。

Objective To study the expression of Oct4 gene, an embryonic stem cell marker, in cervical carcinoma cell lines and tissues for the purpose of finding the relationship between this gene and cervical cancer. Methods The expression of Oct4 in normal cervical tissues and cervical carcinoma tissue and cell lines was detected by the immunohistochemistry and RT-PCR. Results （1） The expression of Oct4 mRNA in cervical carcinomas （73.3%, 22/30） was significantly higher （P〈0.01） than that in normal cervical tissues （25%, 3/12） ; （2） The rate of Oct4 protein expression in cervical cancer （53.7%, 22/41） was higher （P〈0.01） than that in normal cervical tissues （7.7%, 1/13） （3） Oct4 protein was expressed in cervical carcinoma cell lines and primary tumorspheres. （4） The expression of Oct4 in tumorspheres was down-regulated during cell differentiation. Conclusion Our results imply that Oct4 may be one of the cervical cancer stem cell markers, but this still needs further research data to support.