1887

Abstract

A single genetic locus, flavivirus resistance (), controls virus titres and severity of flavivirus infection in mouse brain. It has been mapped to mouse chromosome 5 and shown to include different allelic forms. While the majority of laboratory mouse strains are susceptible to flaviviruses and carry the (s) allele, wild mice and laboratory mouse strains recently derived from them are resistant and carry flavivirus-resistance alleles including -like and alleles. Although there is a mouse model of flavivirus resistance conferred by the allele, other resistance alleles have not been adequately studied due to a lack of appropriate animal models. In this paper we describe the development of new flavivirus-resistant mouse strains, C3H.M.domesticus- and C3H.MOLD- , which carry the novel resistance alleles -like and on the genetic background of flavivirus susceptible C3H/HeJ mice. The new strains were created by 10 to 11 generations of backcrossing followed by brother-sister matings resulting in a generation of homozygous founder stocks. Genome analysis of the newly developed mouse strains has revealed chromosomal regions of approximately 9 and 11 cM, respectively, encompassing on chromosome 5, which are derived from resistant donor mice. These segments are much smaller than the segment of approximately 31 cM described in the congenic resistant mouse strain C3H.PRI- (also known as C3H/RV). The new congenic mouse strains, which were created to carry the -like and alleles on the standardized genetic background of susceptible mice, represent new animal models of flavivirus resistance conferred by these novel resistance alleles.

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/content/journal/jgv/10.1099/0022-1317-80-4-897
1999-04-01
2022-05-21
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