Laboratory Animal and Comparative Medicine ›› 2021, Vol. 41 ›› Issue (3): 226-231.DOI: 10.12300/j.issn.1674-5817.2020.136

• Original Article: Animal Models of Human Diseases • Previous Articles     Next Articles

Effect of Helicobacter hepaticus Infection on Chronic Colitis Induced by Dextran Sulfate Sodium

WU Zhihao1, SHEN Chen1, YIN Jun1, ZHU Liqi1, ZHANG Quan1,2   

  1. 1. College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China;
    2. Affiliated Hospital of Yangzhou University, Yangzhou 225001, China
  • Received:2020-11-09 Revised:2021-03-22 Online:2021-06-25 Published:2021-07-05
  • Contact: ZHANG quan, E-mail: zquan@yzu.edu.cn

Abstract: Objective To investigate the effect of Helicobacter hepaticus (H.h) infection on chronic colitis induced by dextran sulfate sodium (DSS). Methods Forty male interleukin (IL)-10-/- mice were randomly divided into control, H.h, DSS, and H.h + DSS groups. Mice in the H.h group and H.h + DSS group were infected with H.h by gavage. Five days later, the mice in DSS group and H.h + DSS group received two 7-day cycles of a 2% DSS drink with a 5-day withdrawal time between them, while the other groups received sterilized water. At the end of the experiment, all groups of mice were sacrificed and the colon of each mouse was excised, the colon length was measured, and the colon divided into three parts for histopathological examination, cytokine mRNA transcription detection, and phosphorylation detection of signal transducer and activator of transcription 3 (STAT3). Results The pathological results showed that lymphocytes infiltration, loss of epithelium, degree of fibrosis, and crypt atrophy were more obvious in the H.h + DSS group than those in the DSS group. In addition, the transcription levels of the cytokines IL-6 and tumor necrosis factor-α (TNF-α) were upregulated, while STAT3 was activated. Conclusion H.h infection can aggravate DSS-induced chronic colitis in mice.

Key words: Helicobacter hepaticus, Chronic colitis, Dextran sulfate sodium, Mice

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