Imbalanced expression of mitogen-activated protein kinase phosphatase-1 and phosphorylated extracellular signal-regulated kinases in lung squamous cell carcinoma  

作　　者：Kai WANG Min ZHANG Ying-ying QIAN Zhe-vuan DING Jun-hui LV Hua-hao SHEN 

机构地区：[1]Department of Respiratory Medicine, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China [2]School of Medicine, Zhejiang University, Hangzhou 310058, China

出　　处：《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》2011年第10期828-834,共7页浙江大学学报（英文版）B辑（生物医学与生物技术）

基　　金：supported by the National Natural Science Foundation of China (No. 30900654);the Science and Technology Department of Zhejiang Province (No. 2009R10031);the Health Bureau of Zhejiang Province (No. 2009QN010), China

摘　　要：Objective： Mitogen-activated protein kinases （MAPKs） are correlated with a more malignant phenotype in many cancers. This study was designed to evaluate the predictive value of the expression of MAPK phosphatase-1 （MKP-1） and phosphorylated extracellular signal-regulated kinase 1/2 （p-ERKl/2）, as the key regulatory mechanism of the MAPKs, in lung squamous cell carcinoma （SCC）. Methods： We assessed the expressions of MKP-1 and p-ERK1/2 in twenty subjects at different differentiation degree of SCC and five normal lungs by immunohistochemistry and real-time reverse transcriptase polymerase chain reaction （RT-PCR） analysis. Results： Immunohistochemistry and real-time RT-PCR assay showed that the expression of MKP-1 was gradually decreased as tissue type went from normal lung tissues to increasingly undifferentiated carcinoma, and it was negatively correlated with tumor differentiation （P〈0.01）. However, the expression of p-ERK1/2 or ERKl/2 was gradually increased as tissue type went from normal lung tissues to increasingly undifferentiated carcinoma, and it was positively correlated with tumor differentiation （P〈0.01）. Conclusions： Our data indicates the relevance of MKP-1 and p-ERK1/2 in SCC as a potential positive and negative prognostic factor. The imbalanced expression of MKP-1 and p-ERKl/2 may play a role in the development of SCC and these two molecules may be new targets for the therapy and prognosis of SCC.Objective:Mitogen-activated protein kinases (MAPKs) are correlated with a more malignant phenotype in many cancers.This study was designed to evaluate the predictive value of the expression of MAPK phosphatase-1 (MKP-1) and phosphorylated extracellular signal-regulated kinase 1/2 (p-ERK 1/2),as the key regulatory mechanism of the MAPKs,in lung squamous cell carcinoma (SCC).Methods:We assessed the expressions of MKP-1 and p-ERK 1/2 in twenty subjects at different differentiation degree of SCC and five normal lungs by immunohistochemistry and real-time reverse transcriptase polymerase chain reaction (RT-PCR) analysis.Results:Immunohistochemistry and real-time RT-PCR assay showed that the expression of MKP-1 was gradually decreased as tissue type went from normal lung tissues to increasingly undifferentiated carcinoma,and it was negatively correlated with tumor differentiation (P<0.01).However,the expression of p-ERK 1/2 or ERK 1/2 was gradually increased as tissue type went from normal lung tissues to increasingly undifferentiated carcinoma,and it was positively correlated with tumor differentiation (P<0.01).Conclusions:Our data indicates the relevance of MKP-1 and p-ERK 1/2 in SCC as a potential positive and negative prognostic factor.The imbalanced expression of MKP-1 and p-ERK 1/2 may play a role in the development of SCC and these two molecules may be new targets for the therapy and prognosis of SCC.

关 键 词：Mitogen-activated protein kinase phosphatase-1 （MKP-1） Extracellular signal-regulated kinase （ERK） Lung squamous cell carcinoma （SCC） Prognostic factor 

分 类 号：R734.2[医药卫生—肿瘤]