title: Association of Protein Tyrosine Phosphatase Nonreceptor 22 (PTPN22) C1858T gene polymorphism with susceptibility to autoimmune thyroid diseases: a meta-analysis.
abstract: Results from studies on the association of PTPN22 C1858T polymorphism with AITD risk are conflicting, we thereby perform this meta-analysis to derive a more precise effect on this possible association.  Two investigators independently searched the PubMed, Embase, Wanfang and CNKI (China National Knowledge Infrastructure) databases.  A total of 11 studies with 3764 AITDs cases and 3328 controls were finally identified.  Statistically significant association was observed between PTPN22 C1858T polymorphism and AITD risk based on all studies (TT vs. CC, OR=2.18, 95%CI=1.31˜3.62; TC vs. CC, OR=1.50, 95%CI=1.29˜1.73; TT/TC vs. CC, OR=1.41, 95%CI=1.12˜1.78; TT vs. TC/CC, OR=2.00, 95%CI=1.21˜3.33).  The results of subgroup analysis showed that: (1) regarding ethnic diversity, the variant genotypes TT/TC of C1858T were associated with a significantly increased AITD risk in Caucasians (TT/TC vs. CC, OR=1.41, 95%CI=1.09˜1.83) (2) regarding different countries, the statistically significantly association was observed in UK (TC vs. CC, OR=1.64, 95%CI=1.36˜1.98; TT/TC vs. CC, OR=1.65, 95%CI=1.37˜1.98) and other countries (including South Tunisia, Russia, Polish, Japanese) (TT vs. CC, OR=3.65, 95%CI=1.43˜9.33; TT vs. TC/CC, OR=3.41, 95%CI=1.34˜8.65).  (3) regarding the subtypes of AITDs, patients with Graves' disease (GD) had a significant higher degree of C1858T polymorphism (TT vs. CC, OR=2.35, 95%CI=1.36˜4.05; TC vs. CC, OR=1.46, 95%CI=1.12˜1.89; TT/TC vs. CC, OR=1.54, 95%CI=1.33˜1.80; TT vs. TC/CC, OR=2.16, 95%CI=1.25˜3.72), while no association was observed in patients with Hashimoto's thyroiditis (HT).  No publication bias was observed.  Our results demonstrated that PTPN22 C1858T polymorphism was associated with AITD risk, especially in Caucasians.
authors.affiliation: Department of Clinical Immunological Laboratory, West China Hospital, Sichuan University, 610041, China.
authors.forename: Limei
authors.initials: L
authors.lastname: Luo
authors.forename: Bei
authors.initials: B
authors.lastname: Cai
authors.forename: Fei
authors.initials: F
authors.lastname: Liu
authors.forename: Xin
authors.initials: X
authors.lastname: Hu
authors.forename: Lanlan
authors.initials: L
authors.lastname: Wang
mesh_terms: D019943:Amino Acid Substitution; D044466:Asian People; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D006801:Humans; D020641:Polymorphism, Single Nucleotide; D054596:Protein Tyrosine Phosphatase, Non-Receptor Type 22 / Q000235:genetics* / Q000378:metabolism; D013967:Thyroiditis, Autoimmune / Q000235:genetics* / Q000378:metabolism; D044465:White People
chemical_list: C516765:PTPN22 protein, human; D054596:Protein Tyrosine Phosphatase, Non-Receptor Type 22