Novel missense mutation in PTPN22 in a Chinese pedigree with Hashimoto’s thyroiditis

BMC Endocrine Disorders

Hong Pan¹  Binbin Wang¹  Ping Yang²  Jinyi Wu²  Licheng Gong²  Jing Wang³  Beihong Liu⁴  Anhui Qi⁴  Siyang Zhang⁴ 

[1] Center for Genetics, National Research Institute of Family Planning;Department of Cardiology, China Japan Union Hospital of Jilin University;Department of Medical Genetics and Developmental Biology, School of Basic Medical Sciences, Capital Medical University;Graduate School of Peking Union Medical College;

关键词: Hashimoto’s thyroiditis;    Whole-exome sequencing;    PTPN22;    Mutation;   

DOI  :  10.1186/s12902-018-0305-8

来源: DOAJ

【 摘 要 】

Abstract Background Hashimoto’s thyroiditis is a complex autoimmune thyroid disease, the onset of which is associated with environmental exposures and specific susceptibility genes. Its incidence in females is higher than its incidence in males. Thus far, although some susceptibility loci have been elaborated, including PTPN22, FOXP3, and CD25, the aetiology and pathogenesis of Hashimoto’s thyroiditis remains unclear. Methods Four affected members from a Chinese family with Hashimoto’s thyroiditis were selected for whole-exome sequencing. Missense, nonsense, frameshift, or splicing-site variants shared by all affected members were identified after frequency filtering against public and internal exome databases. Segregation analysis was performed by Sanger sequencing among all members with available DNA. Results We identified a missense mutation in PTPN22 (NM_015967.5; c. 77A > G; p.Asn26Ser) using whole-exome sequencing. PTPN22 is a known susceptibility gene associated with increased risks of multiple autoimmune diseases. Cosegregation analysis confirmed that all patients in this family, all of whom were female, carried the mutation. All public and private databases showed that the missense mutation was extremely rare. Conclusions We found a missense mutation in PTPN22 in a Chinese HT pedigree using whole-exome sequencing. Our study, for the first time, linked a rare variant of PTPN22 to Hashimoto’s thyroiditis, providing further evidence of the disease-causing or susceptibility role of PTPN22 in autoimmune thyroid disease. Functional studies regarding the effects of this variant on thyroid autoimmunity and thyroid function are warranted.

【 授权许可】

Unknown