Ribosomal s6 protein kinase 4: a prognostic factor for renal cell carcinoma.

Ribosomal s6 protein kinase 4: a prognostic factor for renal cell carcinoma.
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核糖体 s6 蛋白激酶 4:肾细胞癌的预后因素

DOI:
10.1038/bjc.2013.463
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发表时间:
2013-09-03
影响因子:
8.8
通讯作者:
Wang Z
Wang Z
中科院分区:
医学1区
文献类型:
--
作者:
Fan L;Li P;Yin Z;Fu G;Liao DJ;Liu Y;Zhu J;Zhang Y;Wang L;Yan Q;Guo Y;Shao C;Huang G;Wang Z

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背景:核糖体s6蛋白激酶4(RSK4)在肾细胞癌(RCC)中的表达和功能尚不清楚。方法:采用免疫组织化学法检测RCC中RSK4的表达,统计分析RSK4表达与RCC患者临床病理特征及预后的关系。检测RSK4在RCC细胞系中的异位表达,以确定其对细胞周期调节、肿瘤侵袭和转移能力的影响。结果:与正常组织相比,RSK4在RCC中过表达(P=0.003),并且在不同RCC亚型中表达存在差异(P=0.021),特别是在乳头状RCC的两种亚型中(P=0.001)。 RSK4表达与高pT分期(P<0.001)、高Fuhrman分级(P<0.001)、淋巴结受累(P<0.001)和远处转移(P=0.039)呈正相关,并且可以预测RCC患者的不良预后。分子研究表明,RSK4的过表达可以促进细胞周期进程,增强RCC细胞系的侵袭和转移能力,反之亦然。结论:RSK4在RCC中的表达模式和分子机制表明,它可能是一个潜在的独立预后因素,并可作为RCC患者新的潜在治疗靶点。
Background:The expression and function of ribosomal s6 protein kinase 4 (RSK4) in renal cell carcinoma (RCC) are unknown.Methods:Immunohistochemistry was used to detect the expression of RSK4 in RCC, and the relationship between RSK4 expression and clinicopathological features as well as prognosis of RCC patients was statistically analysed. Ectopic RSK4 expression in RCC cell lines was performed to determine its effect on cell cycle regulation, tumour invasiveness, and metastatic capability.Results:RSK4 was overexpressed in RCCs (P= 0.003), compared with normal tissues, and the expression varied in different RCC subtypes (P= 0.021), especially in two subtypes of papillary RCCs (P= 0.001). RSK4 expression was positively correlated with high pT stage (P< 0.001), high Fuhrman grade (P< 0.001), lymph node involvement (P< 0.001), and presence of distant metastasis (P= 0.039), and could predict poor outcome in RCC patients. Molecular studies showed that overexpression of RSK4 could promote cell cycle progression and enhance the invasive and metastatic capability of RCC cell lines and vice versa.Conclusion:The expression pattern and molecular mechanisms of RSK4 in RCCs indicate that it could be a potential independent prognostic factor and serve as a new potential therapeutic target for RCC patients.
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