title: Opposing effects of the HLA-DRB1*0301-DQB1*0201 haplotype on the risk for multiple sclerosis in diverse Arab populations in Israel.
abstract: Different multiple sclerosis (MS) prevalence rates were reported for Muslim and Christian Arabs in Israel. In this study, we evaluated whether associations of human leukocyte antigen (HLA) genes with MS may contribute to this prevalence difference. DNA samples from Israeli Arab MS patients (n=109) and controls (n=132) were typed for HLA class I (HLA-A, -B and -C) and II (HLA-DRB1 and -DQB1) genes. Global comparisons of HLA allele frequencies revealed significant differences between Christians and Muslims; therefore, case-control analyses were stratified by religious affiliation. Disease characteristics of Muslim and Christian Arab MS patients were similar to those reported for European populations. Opposing association signals with MS were observed for alleles composing the DRB1*0301-DQB1*0201 haplotype: positive association of the HLA-DRB1*0301 allele in Muslims (P(Bonferroni)=0.004, odds ratio (OR)=3.07), and negative association in Christian Arabs (P(Bonferroni)=0.01, OR=0.12), with similar results obtained for HLA-DQB1*0201. HLA-B*52 was negatively associated with MS only in Muslims (P(Bonferroni)=0.01, OR=0.03). The study presents for the first time a high-resolution HLA gene analysis in clinically well-characterized Arab populations with MS, and shows the population-specific contribution of the DRB1*0301-DQB1*0201 haplotype to disease susceptibility.
authors.affiliation: The Lautenberg Center for Immunology, Hebrew University Hadassah Medical School, Jerusalem, Israel.
authors.forename: G
authors.initials: G
authors.lastname: Benedek
authors.forename: T
authors.initials: T
authors.lastname: Paperna
authors.forename: N
authors.initials: N
authors.lastname: Avidan
authors.forename: I
authors.initials: I
authors.lastname: Lejbkowicz
authors.forename: J R
authors.initials: JR
authors.lastname: Oksenberg
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.forename: C
authors.initials: C
authors.lastname: Brautbar
authors.forename: S
authors.initials: S
authors.lastname: Israel
authors.forename: A
authors.initials: A
authors.lastname: Miller
mesh_terms: D000328:Adult; D000368:Aged; D018912:Arabs / Q000208:ethnology / Q000235:genetics*; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease / Q000208:ethnology* / Q000235:genetics; D006683:HLA-DQ Antigens / Q000235:genetics*; D059866:HLA-DQ beta-Chains; D006684:HLA-DR Antigens / Q000235:genetics*; D059811:HLA-DRB1 Chains; D006239:Haplotypes / Q000235:genetics; D006801:Humans; D007514:Islam; D007557:Israel / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000208:ethnology* / Q000235:genetics*; D016017:Odds Ratio; D015995:Prevalence
chemical_list: D006683:HLA-DQ Antigens; D059866:HLA-DQ beta-Chains; C069051:HLA-DQB1 antigen; D006684:HLA-DR Antigens; D059811:HLA-DRB1 Chains; C553502:HLA-DRB1*03:01 antigen