Abstract
We analyzed the association between single nucleotide polymorphisms in IL-12 and IL-18 genes in disease susceptibility and severity of SLE in Thais. A weak association was observed between A allele of the IL-12 gene at the 3′ untranslated region in SLE patients with proteinuria (OR = 1.89, 95% CI = 1.05–3.40, P = 0.02, Pc = 0.06). In addition, we found a significant association between C allele of IL-18 (−137) with arthritis (OR = 6.88, 95% CI = 1.54–42.93, P = 0.003, Pc = 0.009). The presence of one C allele (C/C+C/G) was associated with significant OR of 8.72 (95% CI = 1.83–56.71, P = 0.001, Pc = 0.003). Interestingly, we found the combined effect between the G/C genotype of IL-18 (−137) and the A/A genotype of IFNG (+874) gene causing susceptibility of arthritis in SLE patients (OR = 13.22, 95% CI = 1.56–291.66, P = 0.004).
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Acknowledgements
This study was supported by the Human Genetics grant from the National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand, Lupus Research Unit, Chulalongkorn University and the Faculty of Science, Burapha University. The authors wish to thank all the patients for their cooperation.
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Hirankarn, N., Tangwattanachuleeporn, M., Wongpiyabovorn, J. et al. Association of IL-18 gene polymorphism (−137C) with arthritis manifestations in SLE: combined effect with IFN gamma gene polymorphism (+874A). Clin Rheumatol 28, 219–223 (2009). https://doi.org/10.1007/s10067-008-1036-4
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DOI: https://doi.org/10.1007/s10067-008-1036-4