Abstract:
:The aim of this study was to test whether the functional variant rs2076530 of the BTNL2 gene confers susceptibility to the autoimmune diseases type 1 diabetes (T1D), rheumatoid arthritis (RA), and systemic lupus erythematosus (SLE). Our study populations consisted of 326 patients with T1D and 351 healthy subjects, 808 patients with RA and 1137 healthy controls, and 372 patients with SLE and 280 healthy controls. Genotyping of the BTNL2 gene rs2076530 polymorphism was performed by real-time polymerase chain reaction technology, using the TaqMan 5'-allele discrimination assay. We observed statistically significant differences in the distribution of BTNL2rs2076530 alleles between patients with T1D, RA, and SLE and healthy controls (p=0.0035, 0.000003, and 0.00002, respectively), but in two divergent ways: the G allele was associated with T1D and RA, and the A allele was associated with SLE. However, the polymorphism exhibited strong linkage disequilibrium with HLA DQB1-DRB1 haplotypes previously identified as predisposing to the diseases. When the BTNL2 polymorphism was tested conditional on HLA DQB1-DRB1haplotypes, the BTNL2 effect was no longer significant in all three study populations. The BTNL2 rs2076530 polymorphism is associated with T1D, RA, and SLE because of its strong linkage disequalibrium with predisposing HLA DQB1-DRB1 haplotypes in Caucasian populations.
journal_name
Hum Immunoljournal_title
Human immunologyauthors
Orozco G,Eerligh P,Sánchez E,Zhernakova S,Roep BO,González-Gay MA,López-Nevot MA,Callejas JL,Hidalgo C,Pascual-Salcedo D,Balsa A,González-Escribano MF,Koeleman BP,Martín Jdoi
10.1016/j.humimm.2006.02.003subject
Has Abstractpub_date
2005-12-01 00:00:00pages
1235-41issue
12eissn
0198-8859issn
1879-1166pii
S0198-8859(06)00004-8journal_volume
66pub_type
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