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Found 3 results

  1. I would like some help in understanding my results from the 23andme test. I am being told that I have 2 copies of a genetic variant that was tested. The variants were detected in the HLA-DQA1 gene. "We detected two copies of a variant linked to the HLA-DQ2.5 haplotype." Do do these results mean? In the HLA-DQ2.5 - HLA-DQa1 - rs2187668 - there are two TT. Is this bad? Is this what is mean by having homozygous hla dqa2.5? I am new to all of this and am just looking for some answers. I am concerned about being at risk for celiac disease. Thanks!
  2. Celiac.com 02/22/2012 - A research team recently conducted a dense genotyping non-HLA risk loci previously associated with immune-mediated diseases in individuals with celiac disease. The study was conducted under the auspices of the Genetics Department, University Medical Center and University of Groningen, The Netherlands. The team used variants from the 1000 Genomes Project pilot European CEU dataset, along with data from additional re-sequencing studies, to densely genotype a total of 183 non-HLA risk loci previously associated with immune-mediated diseases in 12,041 individuals with celiac disease and in 12,228 control subjects. They were able to discover thirteen new celiac disease risk loci reaching genome-wide significance. This discovery brings the number of loci known to be associated with celiac disease, including the HLA locus, to forty. The team found multiple independent association signals in more than one in three of the loci. This is likely due to a combination of common, low-frequency and rare genetic variants. Compared to earlier data, such as those from HapMap3, the large study group and the dense gene mapping made for a much higher resolution of the pattern of linkage disequilibrium and suggested localization of many signals to finer scale regions. In all, the team found that 29 of the 54 fine-mapped signals seemed to be localized to single genes and, in some instances, to gene regulatory elements. Finally, they defined the complex genetic architecture of the risk regions of celiac disease. They also refined the risk signals for celiac disease, which provide support for the next steps in understanding its causes. The research team included G. Trynka, K. A. Hunt, N. A. Bockett, J. Romanos, V. Mistry, A. Szperl, S. F. Bakker, M. T. Bardella, L. Bhaw-Rosun, G. Castillejo, E. G. de la Concha, R. C. de Almeida, K. R. Dias, C. C. van Diemen, P.C. Dubois, R. H. Duerr, S. Edkins, L. Franke, K. Fransen, J. Gutierrez, G. A. Heap, B. Hrdlickova, S. Hunt, L. P. Izurieta, V. Izzo, L. A. Joosten, C. Langford, M. C. Mazzilli, C. A. Mein, V. Midah, M. Mitrovic, B. Mora, M. Morelli, S. Nutland, C. Núñez, S. Onengut-Gumuscu, K. Pearce, M. Platteel, I. Polanco, S. Potter, C. Ribes-Koninckx, I. Ricaño-Ponce, S. S. Rich, A. Rybak, J. L. Santiago, S. Senapati, A. Sood, H. Szajewska, R. Troncone, J. Varadé, C. Wallace, V. M. Wolters, and A. Zhernakova. The study team also included B. K. Thelma, B. Cukrowska, E. Urcelay, J. R. Bilbao, M. L. Mearin, D. Barisani, J. C. Barrett, V. Plagnol, P. Deloukas, C. Wijmenga, and D. A. van Heel, who are variously affiliated with the Spanish Consortium on the Genetics of Coeliac Disease (CEGEC), the PreventCD Study Group, and the Wellcome Trust Case Control Consortium (WTCCC). Source: Nat Genet. 2011 Nov 6;43(12):1193-201. doi: 10.1038/ng.998.
  3. Celiac.com 07/16/2010 - Advances in genetic science are allowing researchers to look more deeply into the genetic causes of auto-immune diseases, including celiac disease. One recent study showed that a particular variation, called the non-synonymous (Gly307Ser) variant, rs763361, in the CD226 gene carries a higher risk for multiple autoimmune diseases in European Caucasian populations. At the conclusion of that study, though, there was still no comparable study of shared autoimmunity with CD226 in non-European populations. An international research team set out to investigate any connection between this single nucleotide polymorphism (SNP) with autoimmune diseases in non-European populations. The team included Amit K. Maiti, Xana Kim-Howard, Swapan K. Nath, Celi Sun, and Parvathi Viswanathan; Laura Guillén and Alejandra C. Cherñavsky; Xiaoxia Qian and Nan Shen; Adriana Rojas-Villarraga and Juan-Manuel Anaya; Carlos Cañas, Gabriel J. Tobón; and Koichi Matsuda They are affiliated variously with the Genetic Epidemiology Unit of the Arthritis and Immunology Research Program at the Oklahoma Medical Research Foundation in Oklahoma City, OK, USA, the Immunogenetic Laboratory of the Hospital de Clínicas José de San Martín at the Universidad de Buenos Aires in Buenos Aires, Argentina, the Shanghai Institute of Rheumatology at Renji Hospital, JiaoTong University School of Medicine in Shanghai, P.R. China, the Centre for Autoimmune Diseases Research (CREA) at the Universidad del Rosario-Corporación para Investigaciones Biológicas in Bogota, Colombia, the Rheumatology Unit of the Fundación Valle del Lili in Cali, Colombia and the Laboratory of Molecular Medicine at the Human Genome Centre of the Institute of Medical Science at the University of Tokyo, Japan. To evaluate any connection between this single nucleotide polymorphism (SNP) with autoimmune diseases in non-European populations, the team compared case–control association between rs763361 and celiac disease (CED) samples from Argentina; SLE, RA, type-1 diabetes (T1D) and primary SS (pSS) from Colombia; and SLE samples from China and Japan. They then genotyped rs763361 and used 2-test to evaluate its genetic association with multiple auto-immune disorders. For each association, the team calculated odds ratio (OR) and 95% CI. Their results show clearly that rs763361 shares a significant association with celiac disease in Argentina (P = 0.0009, OR = 1.60). They also noted indications of possible association with Chinese SLE (P = 0.01, OR = 1.19), RA (P = 0.047, OR = 1.25), SLE (P = 0.0899, OR = 1.24) and pSS (P = 0.09, OR = 1.33) in Colombians. The team then conducted meta-analyses for SLE, using their three populations, and T1D, using their population together with three published populations. Those analyses showed a significant association with rs763361, P = 0.009 (OR = 1.16) and P = 1.1.46 x 10–9 (OR = 1.14), respectively. The team's results show clearly that the coding variation rs763361 in the CD226 gene is associated with multiple auto-immune disorders in non-European populations. Taken together, these studies show that the non-synonymous (Gly307Ser) variant, rs763361, in the CD226 gene carries a higher risk for multiple autoimmune diseases in both European Caucasian and non-European populations. Source: Rheumatology 2010 49(7):1239-1244; doi:10.1093/rheumatology/kep470
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