BACKGROUND: We investigated whether corpus atrophic gastritis worsens in Mongolian gerbils (MGs) after long-term administration of proton pump inhibitor (PPI). MGs are an excellent model for studying Helicobacter pylori-related gastritis and adenocarcinoma. METHODS: MGs were separated into four groups (n =15/group); H pylori (ATCC43504) was inoculated into the OPZ(omeprazole)+Hp (H pylori) and Hp groups, a PPI (OPZ) was administered to the OPZ+Hp and OPZ groups and the control group received no treatment. MGs had access to food containing omeprazole (100 mg/kg body weight/day) for 6 months, after which their stomachs were removed and cut into nine sections (six sections in the fundus and three sections in the antrum). Corpus atrophy was evaluated by the absence of parietal cells in the six sections in the fundus. First, we calculated a percentage of the area devoid of parietal cells in each haematoxylin and eosin-stained section, and then we scored the degree of atrophy by adding the percentages of the six sections. A full score was 600. RESULTS: Neutrophilic and lymphoid infiltrates were greater in the OPZ+Hp group than in the other groups. The corpus atrophy score in the OPZ+Hp group was significantly higher than that in the Hp group (p < 0.0048, Student t test). Significantly more adenocarcinomas were found in the OPZ+Hp (60%) than in the Hp (7%) group animals. CONCLUSION: Long-term PPI administration promotes development of adenocarcinoma, which is associated with the progression of atrophic corpus gastritis in MGs infected with H pylori.
BACKGROUND: We investigated whether corpus atrophic gastritis worsens in Mongolian gerbils (MGs) after long-term administration of proton pump inhibitor (PPI). MGs are an excellent model for studying Helicobacter pylori-related gastritis and adenocarcinoma. METHODS: MGs were separated into four groups (n =15/group); H pylori (ATCC43504) was inoculated into the OPZ(omeprazole)+Hp (H pylori) and Hp groups, a PPI (OPZ) was administered to the OPZ+Hp and OPZ groups and the control group received no treatment. MGs had access to food containing omeprazole (100 mg/kg body weight/day) for 6 months, after which their stomachs were removed and cut into nine sections (six sections in the fundus and three sections in the antrum). Corpus atrophy was evaluated by the absence of parietal cells in the six sections in the fundus. First, we calculated a percentage of the area devoid of parietal cells in each haematoxylin and eosin-stained section, and then we scored the degree of atrophy by adding the percentages of the six sections. A full score was 600. RESULTS: Neutrophilic and lymphoid infiltrates were greater in the OPZ+Hp group than in the other groups. The corpus atrophy score in the OPZ+Hp group was significantly higher than that in the Hp group (p < 0.0048, Student t test). Significantly more adenocarcinomas were found in the OPZ+Hp (60%) than in the Hp (7%) group animals. CONCLUSION: Long-term PPI administration promotes development of adenocarcinoma, which is associated with the progression of atrophic corpus gastritis in MGs infected with H pylori.
Authors: Jeanna A Bugaytsova; Oscar Björnham; Yevgen A Chernov; Pär Gideonsson; Sara Henriksson; Melissa Mendez; Rolf Sjöström; Jafar Mahdavi; Anna Shevtsova; Dag Ilver; Kristof Moonens; Macarena P Quintana-Hayashi; Roman Moskalenko; Christopher Aisenbrey; Göran Bylund; Alexej Schmidt; Anna Åberg; Kristoffer Brännström; Verena Königer; Susanne Vikström; Lena Rakhimova; Anders Hofer; Johan Ögren; Hui Liu; Matthew D Goldman; Jeannette M Whitmire; Jörgen Ådén; Justine Younson; Charles G Kelly; Robert H Gilman; Abhijit Chowdhury; Asish K Mukhopadhyay; G Balakrish Nair; Konstantinos S Papadakos; Beatriz Martinez-Gonzalez; Dionyssios N Sgouras; Lars Engstrand; Magnus Unemo; Dan Danielsson; Sebastian Suerbaum; Stefan Oscarson; Ludmilla A Morozova-Roche; Anders Olofsson; Gerhard Gröbner; Jan Holgersson; Anders Esberg; Nicklas Strömberg; Maréne Landström; Angela M Eldridge; Brett A Chromy; Lori M Hansen; Jay V Solnick; Sara K Lindén; Rainer Haas; Andre Dubois; D Scott Merrell; Staffan Schedin; Han Remaut; Anna Arnqvist; Douglas E Berg; Thomas Borén Journal: Cell Host Microbe Date: 2017-03-08 Impact factor: 21.023
Authors: Wensheng Liu; Susan S Baker; Jonathan Trinidad; Alma L Burlingame; Robert D Baker; John G Forte; Lauren P Virtuoso; Nejat K Egilmez; Lixin Zhu Journal: J Gastroenterol Date: 2013-03-12 Impact factor: 7.527
Authors: Mark T Whary; Sureshkumar Muthupalani; Zhongming Ge; Yan Feng; Jennifer Lofgren; Hai Ning Shi; Nancy S Taylor; Pelayo Correa; James Versalovic; Timothy C Wang; James G Fox Journal: Microbes Infect Date: 2014-02-08 Impact factor: 2.700