Visiting Scientist ： Masahiro Kusunoki Research Project ： The changes in the stomach mucosa and formation of gastric cancer by the long-term administration of sterigmatocystin in Helicobacter pylori-infected Mongolian gerbils Sterigmatocystin is produced by Aspergillus and it is thought to be associated with gastric carcinogenesis. My research is focused on elucidating of the influence that may be associated with the long-term administration of sterigmatocystin in Helicobacter pylori-infected Mongolian gerbils. Others ： I majored in Indian Philosophy and Buddhism at the university. I am interested in both the life sciences and preventive medicine and I am taking a course in Faculty of Medicine, Oita University. I am enjoying this research and appreciate the help and support of the other lab members who both advise and encourage me. Would you like to join us in these experiments? 1) Kusunoki M, Misumi J, Aoki K, Shimada T, Matsuo N, Sumiyoshi H, Ebina N, Yamaguchi T, Okamoto A, Yoshioka H : Long-term administration of sterigmatocystin with drinking water in Helicobacter pylori-infected aged Mongolian gerbil enhances carcinogenesis in the gastric mucosa. Sci Phys Fit. Nutr. Immunol1 9, 8-16, 2009. 2) Kusunoki M, Misumi J, Shimada T, Aoki K, Matsuo N, Sumiyoshi H, Yamaguchi T, Yoshioka H: Long-term administration of the fungus toxin, sterigmatocystin, induces intestinal metaplasia and increases the proliferative activity of PCNA, p53, and MDM2 in the gastric mucosa of aged Mongolian gerbils. Environ Health Prev Med 16, 224-231, 2011.