Both risk alleles for Fc gamma RIIA and Fc gamma RIIIA are susceptibility factors for SLE: a unifying hypothesis
2004 (English)In: Genes and Immunity, ISSN 1466-4879, E-ISSN 1476-5470, Vol. 5, no 2, 130-137 p.Article in journal (Refereed) Published
The aim of this study was to analyze in families with SLE for the presence of linkage and the structure and transmission of haplotypes containing alleles for the low-affinity Fcgamma receptors. The Fcgamma receptor polymorphisms FcgammaRIIA-131R/H, FcgammaRIIIA176F/ V and FcgammaRIIIB-NA1/2 and a polymorphism in the FcgammaRIIB gene were genotyped with RFLP, allele-specific PCR or pyrosequencing. Individual SNPs and haplotypes were tested for linkage in multicase families and for association using contingency tables, transmission disequilibrium test and affected family-based control groups in Swedish and Mexican single-case families. No linkage or association could be detected using the FcgammaR polymorphisms in the multicase families. However, an association was found for both FcgammaRIIA-131R and IIIA-176F alleles in the single-case families, but not for IIIB or IIB. Allelic association to SLE was found for a haplotype that included both risk alleles, but not in haplotypes where only one or the other was present. We propose that FcgammaRIIA-131R and FcgammaRIIIA-176F are both risk alleles for SLE transmitted primarily, but not exclusively on a single major haplotype that behaves functionally in a situation similar to that of compound heterozygozity.
Place, publisher, year, edition, pages
2004. Vol. 5, no 2, 130-137 p.
Fc gamma receptor, SLE, polymorphisms, systemic-lupus-erythematosus, polymerase-chain-reaction, linkage analysis, genetic-linkage, receptor-ii, polymorphism, disease, association, binding, frequencies
Medical and Health Sciences Biological Sciences
IdentifiersURN: urn:nbn:se:kth:diva-23220DOI: 10.1038/sj.gene.6364052ISI: 000189363200007PubMedID: 14737097ScopusID: 2-s2.0-3242773701OAI: oai:DiVA.org:kth-23220DiVA: diva2:341918
QC 20100525 QC 201111012010-08-102010-08-102011-11-01Bibliographically approved