Discovery and verification of matrix gla protein, a TNM staging and prognosis-related biomarker for gastric cancer.
- Author:
Lei GUO
1
;
Xiao-bo GUO
;
Jin-ling JIANG
;
Jia-nian ZHANG
;
Jun JI
;
Bing-ya LIU
;
Zheng-gang ZHU
;
Ying-yan YU
Author Information
- Publication Type:Journal Article
- MeSH: Adult; Aged; Biomarkers, Tumor; genetics; metabolism; Calcium-Binding Proteins; biosynthesis; genetics; Cell Line, Tumor; Extracellular Matrix Proteins; biosynthesis; genetics; Female; Follow-Up Studies; Gene Expression Profiling; Gene Expression Regulation, Neoplastic; Humans; Lymphatic Metastasis; Male; Middle Aged; Neoplasm Staging; Oligonucleotide Array Sequence Analysis; RNA, Messenger; metabolism; Stomach Neoplasms; genetics; metabolism; pathology; Survival Rate; Up-Regulation; Young Adult
- From: Chinese Journal of Pathology 2010;39(7):436-441
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo analyze microarray datasets deposited in the public database and to identify TNM associated genes in gastric cancers.
METHODSMicroarray datasets of gastric cancer were selected from GEO database. Differentially expressed genes related to TNM staging were evaluated by significant analysis of the microarray using MultiExperiment Viewer (MEV) platform. Candidate gene expressions in gastric cancer tissues and cell lines were verified by reverse transcriptase polymerase chain reaction (RT-PCR), quantitative RT-PCR, Western blot and immunohistochemistry.
RESULTSGES4007 dataset was re-analyzed leading to the identification of 14 genes associated with TNM staging. Over-expression of matrix gla protein (MGP) was confirmed in gastric cancer cell lines and tumor tissues by quantitative RT-PCR, Western blot and immunohistochemistry. Increased MGP expression was found in 22 of 54 cases of (40.7%) gastric cancer specimens compared to the normal gastric tissues. The up-regulation of MGP mRNA expression closely correlated with TNM stage (P = 0.001) and prognosis (P = 0.006).
CONCLUSIONSPublic databases of microarray studies are the valuable resources for data mining. MGP has been identified and confirmed as a novel biomarker for the TNM stage and prognosis of gastric cancer.
