Diabetologia

, Volume 34, Issue 1, pp 2–5 | Cite as

Persistent MHV (mouse hepatitis virus) infection reduces the incidence of diabetes mellitus in non-obese diabetic mice

  • S. Wilberz
  • H. J. Partke
  • F. Dagnaes-Hansen
  • L. Herberg
Originals

Summary

The frequency of diabetes mellitus was compared in non-obese diabetic mice before and after inadvertent exposure of the colony to mouse hepatitis virus infection. Prior to exposure, diabetes prevalence and cumulative diabetes incidence in 7-month-old mice was 65% and 25% in females and males, respectively. Diabetes incidence/quarter revealed a seasonal pattern with peaks in winter. After mouse hepatitis exposure, the diabetes incidence in the colony decreased and testing for mouse hepatitis antibody in blood samples revealed a persistent infection. In the offspring of mice delivered by caesarian section, the diabetic incidence increased sharply from a nadir of 36% to 95% and from 9% to 65% in females and males, respectively. In individual mice, diabetes resistance was strongly correlated to high titres of mouse hepatitis virus antibody. The results of this inadvertent viral infection demonstrate that a diabetes-susceptible genotype is strongly modulated by environmental factors. Investigators studying this diabetes model should strive for specific pathogen-free colony status and a high incidence of diabetes before attempting to investigate therapeutic modalities.

Key words

NOD mice diabetes incidence seasonality mouse hepatitis virus infection 

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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • S. Wilberz
    • 1
  • H. J. Partke
    • 1
  • F. Dagnaes-Hansen
    • 2
  • L. Herberg
    • 1
  1. 1.Diabetes Forschungsinstitut der Universität DüsseldorfFRG
  2. 2.Bomholtgard Breeding Research CentreRyDenmark

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