Summary
In the current study our objective was to develop a murine model of human hyper-IgD syndrome (HIDS) and severe mevalonic aciduria (MA), autoinflammatory disorders associated with mevalonate kinase deficiency (MKD). Deletion of one Mvk allele (Mvk +/−) yielded viable mice with significantly reduced liver Mvk enzyme activity; multiple matings failed to produce Mvk −/− mice. Cholesterol levels in tissues and blood, and isoprene end-products (ubiquinone, dolichol) in tissues were normal in Mvk +/− mice; conversely, mevalonate concentrations were increased in spleen, heart, and kidney yet normal in brain and liver. While the trend was for higher IgA levels in Mvk +/− sera, IgD levels were significantly increased (9–12-fold) in comparison to Mvk +/+ littermates, in both young (<15 weeks) and older (>15 weeks) mice. Mvk +/− animals manifested increased serum TNF-α as compared to wild-type littermates, but due to wide variation in levels between individual Mvk +/− mice the difference in means was not statistically significant. Mvk +/− mice represent the first animal model of HIDS, and should prove useful for examining pathophysiology associated with this disorder.
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Hager, E.J., Tse, H.M., Piganelli, J.D. et al. Deletion of a single mevalonate kinase (Mvk) allele yields a murine model of hyper-IgD syndrome. J Inherit Metab Dis 30, 888–895 (2007). https://doi.org/10.1007/s10545-007-0776-7
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DOI: https://doi.org/10.1007/s10545-007-0776-7