Increased protein expression of both inducible nitric oxide synthase and cyclooxygenase-2 in human colon cancers.

Abstract:

:The present study was conducted to investigate protein levels of inducible NO synthase (iNOS) and cayclooxygenase-2 (COX-2) in human colon cancer tissues. Significant increase of iNOS and COX-2 levels in tumors as compared to paired normal tissue was observed in 15 and 28, respectively, of 29 cases investigated. No correlation was observed between the two enzymes, and immunohistochemically demonstrated iNOS expression was mainly observed in tumor epithelial cells and was higher in well-differentiated than moderately-differentiated adenocarcinomas, while COX-2 expression was mainly detected in stromal cells and higher in Dukes' C and D than Dukes' A and B cases. These results suggest that iNOS and COX-2 have separate roles in colon carcinogenesis, and might both be usefully targeted by chemoprevention.

journal_name

Cancer Lett

journal_title

Cancer letters

authors

Ohta T,Takahashi M,Ochiai A

doi

10.1016/j.canlet.2005.08.014

keywords:

subject

Has Abstract

pub_date

2006-08-08 00:00:00

pages

246-53

issue

2

eissn

0304-3835

issn

1872-7980

pii

S0304-3835(05)00765-2

journal_volume

239

pub_type

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