An allelic variant of the protein tyrosin phosphatase non-receptor 22 (PTPN22) gene, PTPN22 R620W, constitutes the strongest non-HLA genetic risk factor for the development of type 1 diabetes (T1D). A number of studies using mouse models have addressed how PTPN22 predisposes to T1D. PTPN22 downmodulation, overexpression or expression of the variant gene in genetically manipulated mice has gener...

allergic rhinitis (ar) is an ige-mediated upper airway disease, and its impact on asthma has been widely recognized. protein tyrosine phosphatase non-receptor 22 (ptpn22) gene and the cytotoxic t-lymphocyte–associated antigen 4 (ctla-4) gene polymorphisms have been reported to be associated with several immune-related diseases. here we investigated the reffect of these two genes’ polymorphisms ...

Background and objectives: Rheumatoid arthritis (RA) is an autoimmune disease with a complex genetic background. The protein tyrosine phosphatase non-receptor type 22 (PTPN22) is a lymphoid specific protein tyrosine phosphatase which is involved in negative regulation of T cell response. Several studies have assessed the association between PTPN22 single nucleotide polymorphisms (SNPs) with RA ...

PTPN22 (protein tyrosine phosphatase non receptor 22) encodes a tyrosine phosphatase that functions as a key regulator of immune homeostasis. In particular, PTPN22 inhibits T-cell receptor signaling and selectively promotes type I interferon responses in myeloid cells. To date, there is little information on the CD8 T-cell-intrinsic role of PTPN22 in response to a viral pathogen. We unexpectedl...

BACKGROUND Variations within the gene locus encoding protein tyrosine phosphatase non-receptor type 22 (PTPN22) are associated with the risk to develop inflammatory bowel disease (IBD). PTPN22 is involved in the regulation of T- and B-cell receptor signaling, but although it is highly expressed in innate immune cells, its function in other signaling pathways is less clear. Here, we study whethe...

allergic rhinitis (ar) is an ige-mediated upper airway disease, and its impact on asthma has been widely recognized. protein tyrosine phosphatase non-receptor 22 (ptpn22) gene and the cytotoxic t-lymphocyte–associated antigen 4 (ctla-4) gene polymorphisms have been reported to be associated with several immune-related diseases. here we investigated the reffect of these two genes’ polymorphisms ...

Background: Single-nucleotide polymorphism (SNP) rs2476601 within protein tyrosine phosphatase non-receptor type 22 gene (PTPN22) has been shown to be a risk factor for different autoimmune diseases. This study explored the association of 1858 C/T SNP with rheumatoid arthritis (RA) and celiac disease (CD) in a region covering south-west of Iran. Methods: Totally, 52 patients with CD, 120 patien...

The protein tyrosine phosphatase non-receptor type 22 (PTPN22) gene, which encodes an intracellular lymphoid-specific phosphatase, is considered an important regulator of T-cell activation. We investigated a possible association between the PTPN22 C1858T (R620W) polymorphism and pulmonary tuberculosis in an Iranian population. Single nucleotide polymorphisms of PTPN22 C1858T (rs2476601) we...

Graves’ disease (GD) is a multifactorial autoimmune with contribution from both genetic andepigenetic factors in its causation. Gene “protein tyrosine phosphatase non receptor 22” (PTPN22) animportant immune regulatory gene preventing hyper responsiveness of T cells by negatively regulatingtheir signal transduction. Cytotoxic T-Lymphocyte Antigen 4 (CTLA-4) polymorphisms belong to themain deter...

A genetic variant of the protein tyrosine phosphatase non-receptor 22 (PTPN22) is associated with a wide range of autoimmune diseases; however, the reasons behind its prevalence in the general population remain not completely understood. Recent evidence highlights an important role of autoimmune susceptibility genetic variants in conferring resistance against certain pathogens. In this study, w...