Format

Send to

Choose Destination
Carcinogenesis. 2005 Mar;26(3):565-70. Epub 2004 Nov 25.

A COX-2 inhibitor prevents the esophageal inflammation-metaplasia-adenocarcinoma sequence in rats.

Author information

1
Gastroenterologic Surgery, Department of Oncology, Division of Cancer Medicine, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa, Japan.

Abstract

Barrett's esophagus (BE) and esophageal adenocarcinoma (ADC) is associated with reflux of duodenal contents. Cyclooxygenase (COX)-2 is over-expressed in BE and ADC, and supposedly contributes to esophageal carcinogenesis. The aim of this study is to investigate what effect a COX-2 inhibitor has on esophageal adenocarcinogenesis in rats. A series of 90 rats underwent a duodenoesophageal reflux procedure and were divided into 2 groups. One group was given commercial chow (control group), and the other was given experimental chow containing celecoxib (celecoxib group). The animals were sacrificed sequentially, at the 10th, 20th, 30th and, finally, 40th week after surgery, and their esophagi were examined. In the control group, esophagitis, columnar-lined epithelium (CLE) and ADC were first observed at the 10th week, 20th week and 30th week, respectively. Their incidences sequentially increased and at the 40th week reached 100, 89 and 47%, respectively. In the celecoxib group, the esophagitis was mild and the incidence of CLE was significantly lower at each week (P < 0.001), compared with the control group, and ADC was not observed throughout the experiment (P < 0.05). COX-2 expression was observed predominantly in the stroma of inflamed esophageal epithelia, and up-regulated at the 10th and 20th week (P < 0.05, respectively). PGE2 level and proliferative activity were also up-regulated in both groups, but they were lower in the celecoxib group than in the control group (P < 0.05). Apoptosis was observed to increase with celecoxib treatment (P < 0.05). Celecoxib is effective in preventing CLE and ADC by suppressing esophagitis in rats.

PMID:
15564290
DOI:
10.1093/carcin/bgh340
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Silverchair Information Systems
Loading ...
Support Center