In this study, we found no effect on H. pylori colonization under treatment with wasabi extract for
10 d. Adhesion of H. pylori to gastric epithelial cells is one of the initial steps in gastric inflammation. Recent
studies have provided evidence that chronic inflammation that follows oxidative stress caused by H. pylori
infection plays a critical role in the development of gastric cancer. Ohshima et al. reported that 8-oxodG
and 8-nitroguanine as markers of DNA damage were stored in patients infected with H. pylori. Although
in gastritis and gastric ulcer patients infected with H. pylori NADPH oxidase and inducible nitric oxide
synthease (iNOS) expression as an effect of infiltrating inflammatory cells has been observed, eradication of
H. pylori attributed to decrease these cells invasion and iNOS expression in the gastric mucosa. In the
present study, wasabi extract did not effect H. pylori colonization, but oxidative DNA damage was decreased