Abstract:
:The status of the three retinoic acid receptors (RARs) α, β and γ in human colorectal cancer (CRC) has not as yet been examined. RARs are in part responsible for the actions of the retinoids (vitamin A and its derivatives), which are essential for human health and survival due to their extensive involvement in numerous cellular processes, in particular in epithelial morphology. The present study examined the expression of the three RARs in CRC using immunohistochemical analysis of paraffin-embedded tissue sections. RAR expression in tumor (T) and adjacent non-tumor (NT) specimens from stage I (n=6), stage II (n=34), stage III (n=26) and stage IV (n=14) CRC patients was compared with that in normal mucous membranes (n=10) from control individuals. The findings were correlated with tumor grade, treatment response (progression during treatment, remission, chemoresistance) and survival as clinicopathological parameters. RARα and γ expression was decreased with CRC stage in the T tissues (P=0.016 and P=0.052, respectively), suggesting that they may be used as predictive markers. RARβ expression in the NT tissues was associated with a more favorable prognosis (P=0.04). These results provide important information on the tumor microenvironment (the area adjacent to tumor cells).
journal_name
Exp Ther Medjournal_title
Experimental and therapeutic medicineauthors
Perraud A,Nouaille M,Akil H,Petit D,Labrousse F,Jauberteau MO,Mathonnet Mdoi
10.3892/etm.2011.242subject
Has Abstractpub_date
2011-05-01 00:00:00pages
491-497issue
3eissn
1792-0981issn
1792-1015pii
etm-02-03-0491journal_volume
2pub_type
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