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Abstract. Cyclooxygenase-2 (COX-2) and Bcl-2 have been implicated in upper gastrointestinal tract carcinomas, but the underlying mechanisms are not known. In the present study we assessed the correlation of COX-2 and Bcl-2 to known cell kinetics in the glandular stomach mucosa of 104 Wistar rats given combinations of Helicobacter pylori, MNNG (N-methyl-N-nitro-N-nitrosoguanidine) and bile. COX-2 expression,...
Abstract. Helicobacter pylori infection is a risk factor for gastric cancer. How the bacterium contributes to this process is still unclear. We present a new Wistar rat model that was used to evaluate the effect of H. pylori on early preneoplastic events as judged from epithelial cell turnover and histopathological changes. One hundred and four rats were colonized with H. pylori and exposed to MNNG...
Abstract. The aim of this study was to evaluate the early influence of Helicobacter pylori infection on cell kinetics in the antral mucosa of mice exposed to N-methyl-N-nitro-N-nitrosoguanidine (MNNG) and bile alone or in combinations. Four hundred and one C57BL/6 male and female mice were assigned into seven treatment groups and one non-treated control group. The gastric antrums were assessed by...
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