RARRES1 expression is significantly related to tumour differentiation and staging in colorectal adenocarcinoma

Retinoic acid receptor responder 1 (RARRES1) is a retinoid regulated gene. Its expression is frequently down-regulated through DNA hypermethylation in several types of malignant tissues. This study investigated the clinical significance of RARRES1 protein and its association with RARRES3 protein exp...

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Published in:European journal of cancer (1990) 2006-03, Vol.42 (4), p.557-565
Main Authors: Wu, Chang-Chieh, Shyu, Rong-Yaun, Chou, Jung-Mao, Jao, Shu-Wen, Chao, Pei-Chieh, Kang, Jung-Cheng, Wu, Sheng-Tang, Huang, Shiang-Long, Jiang, Shun-Yuan
Format: Article
Language:English
Subjects:
Adenocarcinoma - metabolism
Adenocarcinoma - pathology
Aged
Biological and medical sciences
Cell Transformation, Neoplastic - metabolism
Cell Transformation, Neoplastic - pathology
Colorectal adenocarcinoma
Colorectal Neoplasms - metabolism
Colorectal Neoplasms - pathology
Differentiation
Female
Humans
Immunohistochemistry
Male
Medical sciences
Membrane Proteins - metabolism
Middle Aged
Neoplasm Staging - methods
Pharmacology. Drug treatments
RARRES1
RARRES3
Receptors, Retinoic Acid - metabolism
Retinoic acid
Staging
Survival Analysis
Tumors
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Summary:Retinoic acid receptor responder 1 (RARRES1) is a retinoid regulated gene. Its expression is frequently down-regulated through DNA hypermethylation in several types of malignant tissues. This study investigated the clinical significance of RARRES1 protein and its association with RARRES3 protein expression in 161 (26 adenoma, 13 distal normal mucosa and 122 primary colorectal adenocarcinoma) paraffin-embedded colorectal tissues by immunohistochemistry. RARRES1 protein was detected at the highest levels in terminally differentiated cells of normal mucosal tissues and all 26 adenoma tissues. Among 122 colorectal adenocarcinomas, the poorly differentiated adenocarcinomas and Dukes’ stage D tumours showed a significant decrease in RARRES1 expression ( P < 0.001 and P < 0.01, respectively). RARRES1 expression was significantly ( P < 0.001) correlated with RARRES3 expression, which was positively associated with tumour differentiation ( P < 0.001). Difference in expression of RARRES1 among 119 patients had no apparent effect on patient survival. Our results suggest the role of RARRES1 in colorectal epithelial differentiation, and the down-regulation of RARRES1 is related to stage D progression.
ISSN:0959-8049
1879-0852
DOI:10.1016/j.ejca.2005.11.015