Male-Dependent Promotion of Colitis in 129 Rag2−/− Mice Co-Infected with Helicobacter pylori and Helicobacter hepaticus
Author(s)Ge, Zhongming; Ge, Lili; Muthupalani, Sureshkumar; Feng, Yan; Fox, James G
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The prevalence of gastric Helicobacter pylori (Hp) infection is ~50% of the world population. However, how Hp infection influences inflammatory bowel disease in humans is not fully defined. In this study, we examined whether co-infection with Hp influenced Helicobacter hepaticus (Hh)–induced intestinal pathology in Rag2−/− mice. Rag2−/− mice of both sexes were infected with Hh, of which a subgroup was followed by infection with Hp two weeks later. Co-infected males, but not females, had significantly higher total colitis index scores in the colon at both 10 and 21 weeks post-Hh infection (WPI) and developed more severe dysplasia at 21 WPI compared with mono-Hh males. There were no significant differences in colonization levels of gastric Hp and colonic Hh between sexes or time-points. In addition, mRNA levels of colonic Il-1β, Ifnγ, Tnfα, Il-17A, Il-17F, Il-18, and Il-23, which play important roles in the development and function of proinflammatory innate lymphoid cell groups 1 and 3, were significantly up-regulated in the dually infected males compared with mono-Hh males at 21 WPI. These data suggest that concomitant Hp infection enhances the inflammatory responses in the colon of-Hh-infected Rag2−/− males, which results in more severe colitis and dysplasia.
DepartmentMassachusetts Institute of Technology. Division of Comparative Medicine
International Journal of Molecular Sciences
Ge, Zhongming et al. "Male-Dependent Promotion of Colitis in 129 Rag2−/− Mice Co-Infected with Helicobacter pylori and Helicobacter hepaticus." International Journal of Molecular Sciences 21, 23 (November 2020): 8886 © 2020 The Authors.
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