en
Scientific article
English

Control of separate pathogenic autoantibody responses marks MHC gene contributions to murine lupus

Publication date1999
Abstract

Previous studies have suggested that MHC and non-MHC genes contribute to the development of autoimmune disease in F1 hybrids of New Zealand black (NZB) and white (NZW) mice. We conducted a genome-wide screen of 148 female (NZB x NZW)F1 x NZB backcross mice to map dominant NZW genetic loci linked with lupus disease traits. In this backcross analysis, inheritance of the NZW MHC (H2(d/z) vs. H2(d/d)) was strongly linked with the development of lupus nephritis (P approximately 1 x 10(-16)), increasing the risk of disease by over 30-fold. H2(d/z) was also linked with elevated serum levels of IgG autoantibodies to single-stranded DNA, double-stranded DNA, histones, and chromatin but not with anti-gp70 autoantibodies, measured as circulating gp70-anti-gp70 immune complexes. Non-MHC contributions from NZW seemed weak in comparison to MHC, although NZW loci on chromosomes 7 and 16 were noted to be suggestively linked with autoantibody production. Strikingly, H2(d/z) (compared with H2(d/d)) enhanced antinuclear antibodies in a coordinate fashion but did not affect anti-gp70 production in the current backcross. However, the opposite influence was noted for H2(d/z) (compared with H2(z/z)) when (NZB x NZW)F1 x NZW backcross mice were analyzed. These results suggest that H2(z) and H2(d) haplotypes differentially regulate two different sets of nephritogenic autoantibody responses. This study confirms a critical role for H2(z) compared with other dominant NZW loci in (NZB x NZW)F1 mice and provides an explanation as to why H2(d/z) heterozygosity is required for full expression of disease in this model.

Keywords
  • Animals
  • Antibody Formation
  • Autoantibodies/ blood
  • Chromosome Mapping
  • Crosses, Genetic
  • Female
  • Genes, Dominant
  • Genome
  • H-2 Antigens/genetics
  • Haplotypes
  • Lupus Erythematosus, Systemic/ genetics/ immunology
  • Lupus Nephritis/ genetics/immunology
  • Major Histocompatibility Complex
  • Male
  • Mice
  • Mice, Inbred Strains
  • Polymorphism, Restriction Fragment Length
  • Risk Factors
Affiliation Not a UNIGE publication
Citation (ISO format)
VYSE, T. J. et al. Control of separate pathogenic autoantibody responses marks MHC gene contributions to murine lupus. In: Proceedings of the National Academy of Sciences of the United States of America, 1999, vol. 96, n° 14, p. 8098–8103. doi: 10.1073/pnas.96.14.8098
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Identifiers
ISSN of the journal0027-8424
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