Association of beta2-Adrenergic Receptor Polymorphism with Work-Related Symptoms in Workers Exposed to Wheat Flour.
10.3349/ymj.2011.52.3.488
- Author:
Gyu Young HUR
1
;
Han Jung PARK
;
Hyun Young LEE
;
Dong Hee KOH
;
Byung Jae LEE
;
Gil Soon CHOI
;
Seung Hyun KIM
;
Young Min YE
;
Hae Sim PARK
Author Information
1. Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
Baker's asthma;
ADRB2 polymorphism;
haplotype;
specific IgG antibody
- MeSH:
Adult;
Allergens/*immunology;
Asthma/genetics/*immunology;
Enzyme-Linked Immunosorbent Assay;
Female;
*Flour;
Haplotypes;
Humans;
Immunoglobulin G/immunology;
Inhalation Exposure/analysis;
Male;
Occupational Exposure/analysis;
*Polymorphism, Genetic;
Polymorphism, Single Nucleotide;
Receptors, Adrenergic, beta-2/*genetics;
Skin Tests;
Triticum/*immunology
- From:Yonsei Medical Journal
2011;52(3):488-494
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: Our previous study indicated that the presence of wheat-specific IgG1 and IgG4 antibodies was associated with work-related symptoms in workers exposed to wheat flour. We performed this study to investigate the genetic polymorphisms of beta2-adrenergic receptors and wheat-specific antibodies in association with the clinical parameters of baker's asthma. MATERIALS AND METHODS: In total, 379 subjects working in a single industrial bakery were enrolled in this study. The skin prick test was performed with common inhalant allergens and wheat flour extract. The presence of serum- specific IgE, IgG1, and IgG4 antibodies to wheat flour were determined by ELISA. Whole blood samples were obtained for genotype analysis. Subjects were genotyped with regard to five candidate single nucleotide polymorphisms (SNPs) of the beta2-adrenergic receptor gene (ADRB2; -47 T>C, 46 A>G, 79 C>G, 252 G>A, and 523 C>A) using a single-base extension method. RESULTS: No significant associations were observed between the genotype/allele frequencies of any of the SNPs tested and any clinical parameters. The haplotype of ADRB2 (GAA composed of 46 A>G, 252 G>A, and 523 C>A) was significantly associated with work-related symptoms (p<0.05). Moreover, in subjects with the AG or GG genotype at 46 A>G and haplotype [GAA] of ADRB2, the prevalence rates of wheat-specific IgG1 antibodies and lower respiratory symptoms increased significantly with exposure intensity (both p<0.05). CONCLUSION: The findings of the present study suggest that ADRB2 genetic polymorphism may contribute to the development of work-related symptoms in workers exposed to wheat flour, which can lead to baker's asthma.
