HLA-DRB1 and HLA-DQB1 genes on susceptibility to and protection from allergic bronchopulmonary aspergillosis in patients with cystic fibrosis
- PMID:23278646
- DOI:10.1111/1348-0421.12020
HLA-DRB1 and HLA-DQB1 genes on susceptibility to and protection from allergic bronchopulmonary aspergillosis in patients with cystic fibrosis
Abstract
Allergic bronchopulmonary aspergillosis (ABPA) is a hypersensitivity pulmonary disease that affects both patients with cystic fibrosis (CF) and those with asthma. HLA-DRB1 alleles have previously been associated with ABPA-CF susceptibility; however, HLA-DQB1 allele associations have not been clearly established. The aim of the present study was to investigate HLA class II associations in patients with ABPA-CF and determine their roles in susceptibility or protection. Patients with ABPA-CF, patients with CF without ABPA, patients with asthma without ABPA (AST), and healthy controls were included in this study. DNA was extracted by automatic extractor. HLA-DRB1 and -DQB1 genotyping was performed by the Luminex PCR-SSOP method (One Lambda, Canoga Park, CA, USA). Allele specific PCR-SSP was also performed by high-resolution analysis (One Lambda). Statistical analysis was performed with SSPS and Arlequin software. Both HLA-DRB1*5:01 and -DRB1*11:04 alleles occurred with greater frequency in patients with ABPA-CF than in those with AST and CF and control subjects, corroborating previously published data. On the other hand, analysis of haplotypes revealed that almost all patients with ABPA-CF lacking DRB1*15:01 or DRB1*11:04 carry either DRB1*04, DRB1*11:01, or DRB1*07:01 alleles. In the HLA-DQB1 region, the HLA-DQB1*06:02 allele occurred more frequently in patients with ABPA-CF than in those with AST and CF and healthy controls, whereas HLA-DQB1*02:01 occurred less frequently in patients with ABPA-CF. These data confirm that there is a correlation between HLA-DRB1*15:01, -DRB1*11:04, DRB1*11:01, -DRB1*04 and -DRB1*07:01 alleles and ABPA-CF susceptibility and suggest that HLA-DQB1*02:01 is an ABPA-CF resistance allele.
© 2012 The Societies and Wiley Publishing Asia Pty Ltd.
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