Role of PTPN22 in type 1 diabetes and other autoimmune diseases

• Published in: Seminars in Immunology 2006-08, Vol.18 (4), p.207-213
• Main Authors: Bottini, Nunzio, Vang, Torkel, Cucca, Francesco, Mustelin, Tomas
• Format: Article
• Language: English
• Subjects: Animals; Autoimmune Diseases - enzymology; Autoimmune Diseases - genetics; Autoimmunity; Diabetes; Diabetes Mellitus, Type 1 - enzymology; Diabetes Mellitus, Type 1 - genetics; Humans; LYP; Polymorphism, Single Nucleotide; Protein Tyrosine Phosphatase, Non-Receptor Type 1; Protein Tyrosine Phosphatase, Non-Receptor Type 22; Protein Tyrosine Phosphatases - chemistry; Protein Tyrosine Phosphatases - genetics; Protein Tyrosine Phosphatases - metabolism; PTPN22; SNP; TID
• ISSN: 1044-5323; 1096-3618; 1365-2567
• DOI: 10.1016/j.smim.2006.03.008

We recently discovered that a single-nucleotide polymorphism (SNP) in the lymphoid tyrosine phosphatase (LYP), encoded by the PTPN22 gene on chromosome 1p13, correlates strongly with the incidence of type 1 diabetes (T1D) in two independent populations. This findings has now been verified by numerous studies and it has been expanded to rheumatoid arthritis, juvenile rheumatoid arthritis, systemic lupus erythematosus, Graves’ disease, generalized vitiligo and other autoimmune disease. Here we review the genetics of the SNP and its association with autoimmunity, discuss the function of the phosphatase in signaling, the biochemistry of the disease-predisposing allele, and the possible mechanisms by which PTPN22 contributes to the development of human disease.