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A functional variant of protein tyrosine phosphatase nonreceptor 22 (PTPN22) has recently been shown to be associated with multiple autoimmune diseases, including systemic lupus erythematosus (SLE), rheumatoid arthritis, type 1 diabetes, and autoimmune thyroid disease. In this review, we discuss the structure and function of this gene and its disease-associated polymorphisms. In addition, we review the studies investigating the association between this gene and SLE, along with other autoimmune diseases.
Chung et al. (Mon,) studied this question.
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