HLA-DR and DQ polymorphisms in bullous pemphigoid from northern China.
Bullous pemphigoid (BP) is an autoimmune disease mediated by autoantibodies against hemidesmosome components. This study used PCR-sequence-specific primers to genotype polymorphisms in HLA-DR and DQ in 25 BP patients and 57 normal controls from northern China. We found lower frequencies of DRB1*08 (DR8) and DRB1*08/DQB1*06 (DR8/DQ6) haplotypes in BP patients than in controls (4.08% vs. 15.19% and 1.54% vs. 13.82%, respectively; P < 0.05), suggesting a protective role for DR8 and DR8/DQ6 haplotypes in BP patients from northern China; there were no statistical differences among other alleles tested. This result is strikingly different from previous reports that DQB1*0301 is associated with BP in Caucasian patients and DRB1*1101, DQB1*0302, DRB1*04/DQA1*0301/DQB1*0302 and DRB1*1101/ DQA1*0505/DQB1*0302 with Japanese BP patients. Ethnic differences in the polymorphic composition of the HLA-DR and DQ genes may influence genetic susceptibility to BP.
Gao
X-H
XH
Department of Dermatology, No. 1 Hospital of China Medical University, Shenyang, China.
Winsey
S
S
Li
G
G
Barnardo
M
M
Zhu
X-J
XJ
Chen
H-D
HD
Song
F
F
Zhai
N
N
Fuggle
S
S
Wojnarowska
F
F
D016022:Case-Control Studies; D002681:China; D005787:Gene Frequency; D006683:HLA-DQ Antigens / Q000235:genetics*; D006684:HLA-DR Antigens / Q000235:genetics*; D006801:Humans; D010391:Pemphigoid, Bullous / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods; D011110:Polymorphism, Genetic
D006683:HLA-DQ Antigens; D006684:HLA-DR Antigens