Abstract
Interleukin 1α (IL-1α) has been implicated in the pathogenesis of infectious, auto-immune and inflammatory diseases. Polymorphisms in the genes encoding IL-1α, IL-1β and the IL-1 receptor antagonist (ILRN) molecules have been associated with several inflammatory diseases. As the marker D2S160 has been characterized as a candidate locus for Ankylosing Spondylitis (AS) after a genome-wide scan, and since this locus is located approximately 0.3cM telomeric to the IL-1 gene cluster, we hypothesized that these cytokines might be good candidates for Spondylarthropathies (SpA). Therefore we tested this hypothesis using the transmission disequilibrium test (TDT) in 37 families representing 217 subjects from three intragenic IL-1 gene cluster polymorphisms, the IL1B Taq I, the ILRN 2nd intron, and the IL1A Nco I, taking HLA B27 status into account or not. In conclusion, by means of intra-familial TDT analysis we found no linkage or intra-familial association between SpA and the three IL-1 gene-cluster polymorphisms in SpA multiplex family material.
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