Published online Feb 15, 2015. doi: 10.4291/wjgp.v6.i1.23
Peer-review started: May 21, 2014
First decision: June 27, 2014
Revised: November 18, 2014
Accepted: January 18, 2015
Article in press: January 18, 2015
Published online: February 15, 2015
Core tip: To elucidate the effect of proton pump inhibitor (PPI, rabeparazole) on reflux oesophagitis. Sixteen 8-week-old male Wistar rats were studied. They were performed oesophagoduodenostomy of total gastrectomy to induce oesophageal reflux of biliary and pancreatic juice. Five rats were performed the sham operation (Sham). On post-operative day 7, they were treated with saline (Control) (n = 8) or PPI (rabeprazole, 30 mg/kg per day, ip) (n = 8) for 2 wk. On post-operative 21, all rats were sacrificed and each oesophagus was evaluated histologically. Oesophageal injury was evaluated by macroscopic and microscopic findings as well as the expression of cyclooxygenase-2 (COX2). We measured bile acid in the oesophageal lumen and the common bile duct. The macroscopic ulcer score and microscopic ulcer length of the control group were significantly higher compared to those of the rabeprazole- treated group. The expression of COX2 was significantly increased according to the immunostaining in the control group compared to rabeprazole- treated group. Although there was no difference between the control and PPI groups in the total bile acid in the common bile duct, the bile acid activity in the oesophageal lumen was significantly decreased in the rabeprazole- treated group due to augmentation of the duodenal motor complex. With this model, rabeprazole is good effect for reflux oesophagitis after total gastrectomy from bile reflux.