title: Variants of HLA-DR2/DR51 group haplotypes and susceptibility to tuberculoid leprosy and pulmonary tuberculosis in Asian Indians.
abstract: This study reports our observations on the correlation between HLA-DR2 subtypes and their DR-DQ haplotypes in patients with tuberculoid (TT) leprosy and pulmonary tuberculosis (PTB). DRB1*1501 was significantly increased in patients with PTB (90%) as compared to controls (p < 0.05); whereas the prevalence of DRB1*1502 was significantly increased in patients with TT leprosy (p < 0.05), suggesting allele-specific binding of the pathogen to form disease-causing motifs to the T-cell receptor. Among DR2-DQ haplotypes, the deviation was noted in the distribution of unique and common haplotypes in patients with TT leprosy and PTB. A significant decrease of haplotype DRB1*1501-DRB5*0101-DQA1*0102-DQB1*0502 in TT leprosy and a significant increase of DRB1*1501-DRB5*0101-DQA1*0103-DQB1*0601 in PTB patients were observed. The occurrence of specific DR2 subtypes and their haplotypes in the two disease groups suggests their involvement in disease pathogenesis.
authors.affiliation: Department of Histocompatibility and Immunogenetics, All India Institute of Medical Sciences, New Delhi.
authors.forename: N K
authors.initials: NK
authors.lastname: Mehra
authors.forename: R
authors.initials: R
authors.lastname: Rajalingam
authors.forename: D K
authors.initials: DK
authors.lastname: Mitra
authors.forename: V
authors.initials: V
authors.lastname: Taneja
authors.forename: M J
authors.initials: MJ
authors.lastname: Giphart
mesh_terms: D000328:Adult; D005260:Female; D005838:Genotype; D006683:HLA-DQ Antigens / Q000235:genetics; D059866:HLA-DQ beta-Chains; D006684:HLA-DR Antigens / Q000235:genetics; D015802:HLA-DR2 Antigen / Q000235:genetics*; D059811:HLA-DRB1 Chains; D006239:Haplotypes; D006801:Humans; D015441:Leprosy, Tuberculoid / Q000235:genetics / Q000276:immunology*; D008297:Male; D014397:Tuberculosis, Pulmonary / Q000276:immunology*
chemical_list: D006683:HLA-DQ Antigens; D059866:HLA-DQ beta-Chains; C069051:HLA-DQB1 antigen; D006684:HLA-DR Antigens; D015802:HLA-DR2 Antigen; D059811:HLA-DRB1 Chains