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BMJ Publishing Group, Annals of the Rheumatic Diseases, 9(65), p. 1230-1232

DOI: 10.1136/ard.2005.048181

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Lack of association between the protein tyrosine phosphatase non‐receptor 22 (PTPN22)*620W allele and systemic sclerosis in the French Caucasian population

This paper is available in a repository.
This paper is available in a repository.

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Abstract

The minor allele of the R620W missense single‐nucleotide polymorphism (SNP; rs2476601) in the PTPN22 (protein tyrosine phosphatase non‐receptor 22) gene has been reported to be associated with multiple autoimmune diseases, including type 1 diabetes, systemic lupus erythematosus, rheumatoid arthritis, juvenile idiopathic arthritis, autoimmune thyroiditis and vitiligo. Systemic sclerosis (SSc) is a connective tissue disease with some autoimmune abnormalities. The aim of our study was to test for association of the PTPN22*620W allele with SSc in a French Caucasian cohort with a case–control study of 121 patients with SSc and 103 controls. All patients and controls were genotyped for the PTPN22*R620W SNP. No association was found between the PTPN22*620W allele and SSc (7% v 9.2%, p = 0.39). The frequency of genotypes carrying at least one 620W allele was similar in both groups (13% v 17%, p =  0.38). The PTPN22*620W allele was also not associated with autoantibody patterns. Thus, the PTPN22*R620W polymorphism cannot be regarded as a genetic susceptibility factor for SSc in the French Caucasian population.