TY - JOUR
T1 - HLA-DRB1 alleles and HLA-DRB1 shared epitopes are markers for juvenile rheumatoid arthritis subgroups in Colombian mestizos
AU - Garavito, Gloria
AU - Yunis, Edmond J.
AU - Egea, Eduardo
AU - Ramirez, Luis A.
AU - Malagón, Clara
AU - Iglesias, Antonio
AU - De La Cruz, Oscar F.
AU - Uribe, Oscar
AU - Navarro, Edgar
AU - Martinez, Paz
AU - Jaraquemada, Dolores
PY - 2004/4/1
Y1 - 2004/4/1
N2 - We studied the association of human leukocyte antigen (HLA)-DRB1 and HLA-DQB1 alleles and HLA haplotypes with juvenile rheumatoid arthritis (JRA) in 65 patients and 65 controls from Colombia. The JRA subsets were distinguished on the basis of criteria established by the American College of Rheumatology. Two alleles were associated with protection, HLA-DRB1*1501 (p = 0.002) and HLA-DRB1*1402 (p = 0.01). HLA-DRB1*1602 (p = 0.0000002) was associated with susceptibility for systemic JRA and HLA-DRB1*1104 (p = 0.0002) for pauciarticular JRA. Amino acid sequences at residues 70-74 of DRB1 chain shared by HLA-DRB1 alleles (shared epitomes) were also informative. The polyarticular JRA subset revealed association with 70QRRAA 74, which includes HLA-DRB1*04, 01, and 70DRRAA 74, which includes DRB1*1601, 1602, 1101, and 1104. Two new findings of interest were the association of the haplotypes DRB1*1104, DQB1*0301(p = 0.0002) with pauciarticular JRA and DRB1*1602, DQB1*0301 (p = 0.0000002) association with systemic JRA. The DRB1 alleles of these two haplotypes share the epitope 70DRRAA74and were associated with both the pauciarticular and the systemic subset of JRA. Our results suggest that studies of disease susceptibility in populations of admixed genetic background should take into account the contribution of different ethnic groups or nationalities in the recruitment of controls and patients studied in order to rule out genetic stratification. © American Society for Histocompatibility and Immunogenetics, 2004. Published by Elsevier Inc.
AB - We studied the association of human leukocyte antigen (HLA)-DRB1 and HLA-DQB1 alleles and HLA haplotypes with juvenile rheumatoid arthritis (JRA) in 65 patients and 65 controls from Colombia. The JRA subsets were distinguished on the basis of criteria established by the American College of Rheumatology. Two alleles were associated with protection, HLA-DRB1*1501 (p = 0.002) and HLA-DRB1*1402 (p = 0.01). HLA-DRB1*1602 (p = 0.0000002) was associated with susceptibility for systemic JRA and HLA-DRB1*1104 (p = 0.0002) for pauciarticular JRA. Amino acid sequences at residues 70-74 of DRB1 chain shared by HLA-DRB1 alleles (shared epitomes) were also informative. The polyarticular JRA subset revealed association with 70QRRAA 74, which includes HLA-DRB1*04, 01, and 70DRRAA 74, which includes DRB1*1601, 1602, 1101, and 1104. Two new findings of interest were the association of the haplotypes DRB1*1104, DQB1*0301(p = 0.0002) with pauciarticular JRA and DRB1*1602, DQB1*0301 (p = 0.0000002) association with systemic JRA. The DRB1 alleles of these two haplotypes share the epitope 70DRRAA74and were associated with both the pauciarticular and the systemic subset of JRA. Our results suggest that studies of disease susceptibility in populations of admixed genetic background should take into account the contribution of different ethnic groups or nationalities in the recruitment of controls and patients studied in order to rule out genetic stratification. © American Society for Histocompatibility and Immunogenetics, 2004. Published by Elsevier Inc.
KW - HLA association
KW - HLA-DRB1 -DQB1 alleles
KW - JRA
KW - MHC class II haplotypes
KW - juvenile rheumatoid arthritis
U2 - 10.1016/j.humimm.2004.01.016
DO - 10.1016/j.humimm.2004.01.016
M3 - Article
SN - 0198-8859
VL - 65
SP - 359
EP - 365
JO - Human Immunology
JF - Human Immunology
ER -
