alexa Linkage of rheumatoid arthritis to the candidate gene NRAMP1 on 2q35.


Mycobacterial Diseases

Author(s): Shaw MA, Clayton D, Atkinson SE, Williams H, Miller N,

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Abstract The macrophage resistance gene NRAMP1 regulates priming/activation of macrophages for enhanced TNF alpha, IL 1 beta, and MHC class II expression. Since all of these functions are of potential importance in the induction or maintenance or both of autoimmune disease, samples from the Arthritis and Rheumatism Council's repository of multicase rheumatoid arthritis families were typed for a dinucleotide repeat in the NRAMP1 promoter region and four other 2q34 (TNP1) or 2q35 (IL8R, VIL1, DES) marker genes. Identity by descent (IBD) sib pair analysis using a three locus haplotype NRAMP1-IL8RB-VIL1, or NRAMP1 alone, provided preliminary evidence (maximum lod score = 1.01, p = 0.024) for a gene in this region contributing to suceptibility to rheumatoid arthritis. Candidacy for NRAMP1 as the disease susceptibility gene was supported by a significant bias (p = 0.048) towards transmission of the NRAMP1 promoter region allele 3 in affected offspring.
This article was published in J Med Genet and referenced in Mycobacterial Diseases

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