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Rheumatol Int. 2014 Mar;34(3):389-92. doi: 10.1007/s00296-013-2673-8. Epub 2013 Feb 9.

Association study of CRP gene in systemic sclerosis in European Caucasian population.

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Rhumatologie A, APHP, Hôpital Cochin, Université Paris Descartes, 27 Rue du faubourg St Jacques, 75014, Paris, France,


Opsonization and apoptotic cell elements are critical in systemic lupus erythematosus (SLE) and could act through the activation of the innate immunity. C-reactive protein (CRP) belongs to opsonins, and polymorphisms of CRP gene have been shown to be associated with SLE susceptibility. Accumulating evidences show that SLE and systemic sclerosis (SSc) share some genetic susceptibility factors. To determine whether polymorphisms of CRP confer susceptibility to SSc, four SNPs (rs1130864, rs1205, rs1800947 and rs1341665), chosen using Hapmap linkage disequilibrium data and published data, were genotyped in a cohort of 651 SSc patients (569 with antinuclear antibodies, 258 with anti-centromere and 153 with anti-topoisomerase I) and 442 controls. All individuals were of French Caucasian origin. The four polymorphisms were in Hardy-Weinberg equilibrium in the control population. Allelic and genotypic frequencies for these four polymorphisms were found to be similar in SSc patients and controls. Moreover, subphenotype analyses in particular for subgroups having antinuclear antibodies did not detect any difference between SSc patients and controls. These results obtained through a large cohort of European Caucasian SSc patients do not support the implication of CRP gene in the pathogenesis of SSc.

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