1887

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Volume 59, Issue 10

Experimental infection in A/J mice causes enterohepatic disease Free

Abstract

has been identified in the inflamed livers of Eastern woodchucks () infected with woodchuck hepatitis virus (WHV), as well as from the livers of WHV-negative woodchucks. Because the majority of WHV-positive woodchucks with hepatic tumours were culture or PCR positive for this helicobacter, and WHV-negative woodchucks with had hepatitis, the bacterium may have a role in tumour promotion related to chronic inflammation. In this study, the type strain of was inoculated intraperitoneally into 48 male and female A/J mice, a strain noted to be susceptible to -induced liver tumours. Sixteen mice served as mock-dosed controls. At 6, 12 and 18 months post-inoculation (p.i.), there were statistically significant (<0.05) differences in mean inflammation scores for the caecum and proximal colon between experimentally infected and control mice. Differences in hepatic inflammation were significant (<0.05) at 6 and 12 months p.i. between the two groups but not at the 18 month time point. Two infected male mice had livers with severe hepatitis, and the liver samples were culture positive for . Serum IgG levels in the mice dosed with were elevated for the duration of the study. These results demonstrate that the woodchuck helicobacter can successfully colonize mice and cause enterohepatic disease. In the future, a mouse-adapted strain of could be selected to maximize colonization and lesion development. Such a woodchuck helicobacter-infected mouse model could be used to dissect potential mechanisms of microbial co-carcinogenesis involved in tumour development in woodchucks with WHV and in humans with hepatitis B virus.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): H and E, haematoxylin and eosin , p.i., post-inoculation and WHV, woodchuck hepatitis virus
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2010-10-01
2024-04-24
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Experimental Helicobacter marmotae infection in A/J mice causes enterohepatic disease
J. Med. Microbiol. 59, 1235 (2010); https://doi.org/10.1099/jmm.0.020479-0
/content/journal/jmm/10.1099/jmm.0.020479-0
/content/journal/jmm/10.1099/jmm.0.020479-0
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