PMID- 16218914 OWN - NLM STAT- MEDLINE DCOM- 20051223 LR - 20211203 IS - 0001-6314 (Print) IS - 0001-6314 (Linking) VI - 112 IP - 5 DP - 2005 Nov TI - Mediterranean and Amerindian MHC class II alleles are associated with multiple sclerosis in Mexicans. PG - 317-22 AB - OBJECTIVES: Human leukocyte antigen (HLA)-DRB1, DQA1, DQB1 allele typing was performed in Mexicans Mestizos with multiple sclerosis (MS) to define the HLA class II alleles associated with the disease in this population. METHODS: Patients (n = 51) diagnosed according to the Poser criteria and a group of 173 unrelated healthy subjects were studied. PCR-SSOP and PCR-SSP were used for genotyping. RESULTS: Fifty five percent of the patients were females. The mean age at disease onset was 27 years. A relapsing-remitting disease was the most frequent type of MS (67%). A significant association of DRB1*0403 (OR = 5.68) with MS was shown. DRB1*0802 was also involved in susceptibility (OR = 2.41). An excess of DRB1*0802 homozygotes was observed in patients (P = 0.005), this genotype being in genetic equilibrium in controls. CONCLUSIONS: Two novel class II associations are described in Mexicans with MS: DRB1*0403 and DRB1*0802. Both alleles share with DRB1*1501, valine-86 and negatively charged amino acids, in the DRB1-anchoring motif of pocket 4. FAU - Alaez, C AU - Alaez C AD - Department of Immunology & Immunogenetics, Instituto de Diagnostico y Referencia Epidemiologicos (InDRE), Secretary of Health, Mexico City, Mexico. FAU - Corona, T AU - Corona T FAU - Ruano, L AU - Ruano L FAU - Flores, H AU - Flores H FAU - Loyola, M AU - Loyola M FAU - Gorodezky, C AU - Gorodezky C LA - eng PT - Comparative Study PT - Journal Article PL - Denmark TA - Acta Neurol Scand JT - Acta neurologica Scandinavica JID - 0370336 RN - 0 (HLA-DQ Antigens) RN - 0 (HLA-DQ alpha-Chains) RN - 0 (HLA-DQ beta-Chains) RN - 0 (HLA-DQA1 antigen) RN - 0 (HLA-DQB1 antigen) RN - 0 (HLA-DR Antigens) RN - 0 (HLA-DRB1 Chains) RN - 0 (Histocompatibility Antigens Class II) SB - IM MH - Adolescent MH - Adult MH - *Alleles MH - Ethnicity/*genetics MH - Female MH - Gene Frequency MH - Genetic Predisposition to Disease/genetics MH - Genotype MH - HLA-DQ Antigens/genetics MH - HLA-DQ alpha-Chains MH - HLA-DQ beta-Chains MH - HLA-DR Antigens/genetics MH - HLA-DRB1 Chains MH - Histocompatibility Antigens Class II/*genetics MH - Homozygote MH - Humans MH - Indians, Central American/*genetics MH - Male MH - Mediterranean Region/ethnology MH - Mexico MH - Middle Aged MH - Multiple Sclerosis, Chronic Progressive/*genetics MH - Multiple Sclerosis, Relapsing-Remitting/*genetics EDAT- 2005/10/13 09:00 MHDA- 2005/12/24 09:00 CRDT- 2005/10/13 09:00 PHST- 2005/10/13 09:00 [pubmed] PHST- 2005/12/24 09:00 [medline] PHST- 2005/10/13 09:00 [entrez] AID - ANE493 [pii] AID - 10.1111/j.1600-0404.2005.00493.x [doi] PST - ppublish SO - Acta Neurol Scand. 2005 Nov;112(5):317-22. doi: 10.1111/j.1600-0404.2005.00493.x.