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Gene Review

Lmb3  -  lupus in MRL and B6 F2 cross, QTL 3

Mus musculus

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Disease relevance of Lmb3

  • The centromeric region of chromosome 7 was identified as a lupus susceptibility locus in MRL/Fas(lpr) mice as Lmb3 [1].
  • The centromeric region of chromosome 7 from MRL mice (Lmb3) is an epistatic modifier of Fas for autoimmune disease expression [1].
  • Detailed analysis of these animals showed that Lmb3 enhances and accelerates several characteristics of lupus, including autoantibody production, kidney disease, and T cell activation, as well as accumulation of CD4(-)CD8(-) double-negative T cells, the latter a feature of Fas-deficient mice [1].
 

Biological context of Lmb3

  • These findings confirm the role of Lmb3 in lupus susceptibility, as a modifier of Fas(lpr) phenotype, and illustrate the importance of epistatic interaction between genetic loci in the etiology of lupus [1].

References

 
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