Evidence of new risk genetic factor to systemic lupus erythematosus: the UBASH3A gene

• Published in: PloS one Vol. 8; no. 4; p. e60646
• Main Authors: Diaz-Gallo, Lina-Marcela, Sánchez, Elena, Ortego-Centeno, Norberto, Sabio, Jose Mario, García-Hernández, Francisco J, de Ramón, Enrique, González-Gay, Miguel A, Torsten Witte, Anders, Hans-Joachim, González-Escribano, María F, Martin, Javier
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 02.04.2013; Public Library of Science (PLoS)
• Subjects: Adaptor Proteins, Signal Transducing - genetics; Alleles; Analysis; Antigen presentation; Apoptosis; Autoimmune diseases; Biology; Celiac disease; Cellular biology; Chronic conditions; Diabetes; Disease; Disease susceptibility; Ethics; Gene expression; Gene polymorphism; Genetic aspects; Genetic diversity; Genetic polymorphisms; Genetic Predisposition to Disease - genetics; Genomes; Genotype; Homology; Hospitals; Humans; Immunology; Internal medicine; Ligands; Linkage Disequilibrium - genetics; Lupus; Lupus Erythematosus, Systemic - genetics; Lymphocytes T; Medicine; Meta-analysis; Pathogenesis; Patients; Polymorphism; Polymorphism, Single Nucleotide - genetics; Population; Population (statistical); Proteins; Quantitative Trait Loci - genetics; Regression analysis; Replication; Rheumatoid arthritis; Rheumatology; Risk Factors; Signaling; Single-nucleotide polymorphism; Statistical analysis; Studies; Systemic lupus erythematosus; T cell receptors; T-cell receptor; Ubiquitin; United States; Israel
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0060646

The ubiquitin associated and Src-homology 3 (SH3) domain containing A (UBASH3a) is a suppressor of T-cell receptor signaling, underscoring antigen presentation to T-cells as a critical shared mechanism of diseases pathogenesis. The aim of the present study was to determine whether the UBASH3a gene influence the susceptibility to systemic lupus erythematosus (SLE) in Caucasian populations. We evaluated five UBASH3a polymorphisms (rs2277798, rs2277800, rs9976767, rs13048049 and rs17114930), using TaqMan® allelic discrimination assays, in a discovery cohort that included 906 SLE patients and 1165 healthy controls from Spain. The SNPs that exhibit statistical significance difference were evaluated in a German replication cohort of 360 SLE patients and 379 healthy controls. The case-control analysis in the Spanish population showed a significant association between the rs9976767 and SLE (Pc = 9.9E-03 OR = 1.21 95%CI = 1.07-1.37) and a trend of association for the rs2277798 analysis (P = 0.09 OR = 0.9 95%CI = 0.79-1.02). The replication in a German cohort and the meta-analysis confirmed that the rs9976767 (Pc = 0.02; Pc = 2.4E-04, for German cohort and meta-analysis, respectively) and rs2277798 (Pc = 0.013; Pc = 4.7E-03, for German cohort and meta-analysis, respectively) UBASH3a variants are susceptibility factors for SLE. Finally, a conditional regression analysis suggested that the most likely genetic variation responsible for the association was the rs9976767 polymorphism. Our results suggest that UBASH3a gene plays a role in the susceptibility to SLE. Moreover, our study indicates that UBASH3a can be considered as a common genetic factor in autoimmune diseases.