Abstract
Natural resistance of mice to infections with Salmonella typhimurium and Leishmania donovani is regulated by chromosome 1 gene(s) designated Ity and Lsh, respectively1,2. Given the fact that these two microorganisms are taxonomically and antigenically distinct, and yet the host response to them is regulated by the same locus or complex3,4, one might expect that the resistance to other intracellular pathogens would be controlled similarly. Innate resistance of inbred mice to infection with Mycobacterium bovis (BCG) is regulated by a single, dominant, autosomal gene designated Bcg which is known to exist in two allelic forms: resistant Bcgr and susceptible Bcgs (ref. 5). The distribution of Bcgr and Bcgs alleles, among a total of 14 inbred and 38 recombinant inbred (BXD and BXH) strains, matches exactly that established for resistant and susceptible alleles of Lsh (gene controlling resistance to Leishmania donovani) and Ity (gene controlling resistance to Salmonella typhimurium), suggesting that resistance to all these pathogens is controlled by the same chromosome 1 locus. The existence of such a chromosomal locus is further supported by the Bcg–Lsh and Bcg–Ity linkage as established by formal backcross analysis.
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Skamene, E., Gros, P., Forget, A. et al. Genetic regulation of resistance to intracellular pathogens. Nature 297, 506–509 (1982). https://doi.org/10.1038/297506a0
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DOI: https://doi.org/10.1038/297506a0
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