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Logo of bmccancBioMed Centralsearchsubmit a manuscriptregisterthis articleBMC Cancer
BMC Cancer. 2012; 12: 75.
Published online Feb 23, 2012. doi:  10.1186/1471-2407-12-75
PMCID: PMC3350384
REGγ is associated with multiple oncogenic pathways in human cancers
Jing He,#1,4 Long Cui,corresponding author#2 Yu Zeng,1 Guangqiang Wang,1 Ping Zhou,1 Yuanyuan Yang,1 Lei Ji,1 Yanyan Zhao,1 Jiwu Chen,1 Zhuo Wang,1 Tieliu Shi,1 Pei Zhang,3 Rui Chen,4 and Xiaotao Licorresponding author1,4
1Institute of Biomedical Sciences, East China Normal University, 500 Dongchuan Rd., Shanghai 200241, China
2Department of Colorectal Surgery, Xin-hua Hospital, Shanghai Jiao-tong Univerisy, Shanghai, People's Republic of China
3Department of Pathology, the Second Chengdu Municipal Hospital, Chengdu, China
4Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
corresponding authorCorresponding author.
#Contributed equally.
Jing He: violet.hj/at/; Long Cui: longcuidr/at/; Yu Zeng: zengdayu007/at/; Guangqiang Wang: wangguangqiang112/at/; Ping Zhou: zhouping19861116/at/; Yuanyuan Yang: yang0601yuan/at/; Lei Ji: stones_ji/at/; Yanyan Zhao: yanyanz808/at/; Jiwu Chen: jwchen/at/; Zhuo Wang: willalabama/at/; Tieliu Shi: tieliushi01/at/; Pei Zhang: rose.zp2011/at/; Rui Chen: ruichen/at/; Xiaotao Li: xiaotaol/at/
Received July 22, 2011; Accepted February 23, 2012.
Recent studies suggest a role of the proteasome activator, REGγ, in cancer progression. Since there are limited numbers of known REGγ targets, it is not known which cancers and pathways are associated with REGγ.
REGγ protein expressions in four different cancers were investigated by immunohistochemistry (IHC) analysis. Following NCBI Gene Expression Omnibus (GEO) database search, microarray platform validation, differential expressions of REGγ in corresponding cancers were statistically analyzed. Genes highly correlated with REGγ were defined based on Pearson's correlation coefficient. Functional links were estimated by Ingenuity Core analysis. Finally, validation was performed by RT-PCR analysis in established cancer cell lines and IHC in human colon cancer tissues
Here, we demonstrate overexpression of REGγ in four different cancer types by micro-tissue array analysis. Using meta-analysis of publicly available microarray databases and biological studies, we verified elevated REGγ gene expression in the four types of cancers and identified genes significantly correlated with REGγ expression, including genes in p53, Myc pathways, and multiple other cancer-related pathways. The predicted correlations were largely consistent with quantitative RT-PCR analysis.
This study provides us novel insights in REGγ gene expression profiles and its link to multiple cancer-related pathways in cancers. Our results indicate potentially important pathogenic roles of REGγ in multiple cancer types and implicate REGγ as a putative cancer marker.
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