CRYAB-650 Cgreater thanG (rs2234702) affects susceptibility to Type 1 diabetes and IAA-positivity in Swedish population
2012 (English)In: Human Immunology, ISSN 0198-8859, E-ISSN 1879-1166, Vol. 73, no 7, 759-766 p.Article in journal (Refereed) Published
Background: Single nucleotide polymorphisms (SNPs) in the promoter region of CRYAB gene have been associated with in multiple sclerosis. CRYAB gene, which encodes alpha B-crystallin (a member of small heat shock protein), was reported as a potential autoimmune target. In this study we investigated whether SNPs in the promoter region of CRYAB gene were also important in the etiology of Type 1 diabetes (T1D). Methods: Genotyping of SNPs in the promoter region of CRYAB gene was performed in a Swedish cohort containing 444 T1D patients and 350 healthy controls. Three SNPs were included in this study: CRYAB-652 Aandgt;G (rs762550), -650 Candgt;G (rs2234702) and -249 Candgt;G (rs14133). Two SNPs (CRYAB-652 and -650) were not included in previous genome wide association studies. Results: CRYAB-650 (rs2234702) *C allele was significantly more frequent in patients than in controls (OR = 1.48, Pc = 0.03). CRYAB-650 *C allele was associated with IAA positivity (OR = 8.17, Pc andlt; 0.0001) and IA-2A positivity (OR = 2.14, Pc = 0.005) in T1D patients. This association with IAA was amplified by high-risk HLA carrier state (OR = 10.6, Pandlt; 0.0001). No association was found between CRYAB-650 and other autoantibody positivity (GADA and ICA). CRYAB haplotypes were also associated with IAA and IA-2A positivity (highest OR = 2.07 and 2.11, respectively), these associations remain in high HLA-risk T1D patients. Conclusions: CRYAB-650 was associated with T1D in the Swedish cohort we studied. CRYAB-650 *C allele might confers susceptibility to the development of T1D. CRYAB-650 was also associated with the development of IAA-positivity in T1D patients, especially in those carrying T1D high-risk HLA haplotypes. © 2012 American Society for Histocompatibility and Immunogenetics.
Place, publisher, year, edition, pages
Elsevier, 2012. Vol. 73, no 7, 759-766 p.
Autoimmunity; CRYAB; Haplotype; Swedish; Type 1 diabetes
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-90140DOI: 10.1016/j.humimm.2012.04.004OAI: oai:DiVA.org:liu-90140DiVA: diva2:612107