摘要
目的研究核糖体s6蛋白激酶4（RSK-4）在乳腺癌中的表达及意义，探讨RSK-4在乳腺癌发生发展中的作用。方法应用逆转录聚合酶链反应（RT—PCR）及免疫组织化学染色法，检测RSK-4mRNA和蛋白在56例乳腺癌组织、癌旁正常乳腺组织和20例乳腺良性病变组织中的表达。结果RSK-4mRNA在乳腺癌组织、癌旁正常乳腺组织和乳腺良性病变组织中的阳性表达率分别为48．2％、76．8％和75．0％，RSK-4mRNA在乳腺癌组织中的阳性表达率明显低于癌旁正常乳腺组织和乳腺良性病变组织（P〈0．05）。RSK-4mRNA在乳腺癌组织中的表达与肿瘤大小和临床分期有关，肿瘤越大、临床分期越晚，RSK-4mRNA的表达率越低（P〈0．05）。RSK-4蛋白在乳腺癌组织、癌旁正常乳腺组织和乳腺良性病变组织中的阳性表达率分别为39．3％、71．4％和75．0％，RSK-4蛋白在乳腺癌组织中的阳性表达率明显低于癌旁正常乳腺组织和乳腺良性病变组织（P〈0．05）。RSK-4蛋白在乳腺癌组织中的表达与肿瘤大小、临床分期以及有无淋巴结转移有关，肿瘤越大、临床分期越晚以及伴淋巴结转移者RSK-4蛋白的表达率低（P〈0．05）。56例乳腺癌组织中，RSK-4mRNA和蛋白的表达一致率为73．2％，二者的表达显著相关（χ^2=10．254，P〈0．05）。结论RSK-4可能足乳腺癌的抑癌基因，其表达降低或缺失可能引起乳腺癌的发生和发展。
Objective To study the expression and clinical significance of ribosomal S6 kinase-4 （RSK-4） in breast cancer and explore the role of RSK-4 in the genesis and development of breast cancer. Method The expression levels of RSK-4 mRNA and protein were detected in 56 cases of breast cancer and the normal breast tissues, as well as in 20 cases of breast benign lesions, by reverse transcriptase polymerase chain reaction （RT-PCR） and immunohistochemistry. Results The expression rates of RSK-4 mRNA in breast cancer, the normal breast tissues and breast benign lesions were 48.2%, 76.8% and 75.0% , respectively. The expression level of RSK-4 mRNA in breast cancer was significantly lower than those in normal breast tissues and breast benign lesions tissues （P 〈 0.05 ）. The expression level of RSK-4 significantly correlated with tumor size and clinical stage （ P 〈 0.05 ）. The expression rate of RSK-4 protein was 39.3% in breast cancer tissues, which was significantly lower than that of normal breast tissues （71.4%） and breast benign lesions （75.0% , P 〈0.01 ）. The expression level of RSK-4 protein was lower in breast cancer with large tumor, high clinical stage and lymph node metastasis. In 56 cases of breast cancer samples, the consistency rate of RSK-4 mRNA and protein was 73.2%. A significant correlation was found between RSK-4 mRNA and protein （χ^2 = 10.254, P 〈 0.05 ）. Conclusion The down-regulation of RSK-4 expression in breast caner suggests that it is a breast cancer suppressor gene, and the lack or down-regulation of RSK-4 expression is involved in the genesis and progression of breast cancer.
出处
《中华肿瘤杂志》
CAS
CSCD
北大核心
2011年第6期452-456,共5页
Chinese Journal of Oncology
基金
国家自然科学基金（30960427）
广西科学研究与技术开发计划项目基金（0816004-14）
