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Association of polymorphism of Met764Thr locus allele in ADAM33 gene with bronchial asthma and lung function of asthmatic subjects



Association of polymorphism of Met764Thr locus allele in ADAM33 gene with bronchial asthma and lung function of asthmatic subjects



Zhonghua Jie He He Hu Xi Za Zhi 30(7): 518-521



Objective To analyze the association of the polymorphism of Met764Thr with bronchial asthma and lung function of asthmatic subjects of Han nationality in Southern China. Methods In 164 unrelated patients with asthma and 112 unrelated healthy controls, polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and DNA sequencing were used to determine polymorphism of Met764Thr locus allele in ADAM33 gene. The clinical indexes associated with lung function ( FVC%, FEV, %) were compared among the three genotypes( MeOWW064, Met764/Thr764, Thr764/Thr764) in asthmatic subjects. Results No significant difference was found in the allele ( Met764, Thr 764) frequency among populations in UK, US, German, Korean, and Southern China ( X-2 = 6. 77, P > 0. 05). The frequencies of the genotypes ( Met764/Met764, Met764/Thr764, Thr764/Thr764) were respectively 78. 7% ( 129) 18. 3% (30) 3. 0% (5) in 164 asthmatic subjects and respectively 91. 1% ( 102), 6. 3% (7), 2. 7% (3) in the 112 controls. There was a significant difference in the distributions of the genotypes ( Met764/Met764, Met764/Thr764, Thr764/Thr764) between asthmatic subjects and controls ( X-2 = 8. 46, P < 0. 05). The frequencies of alleles (Thr764) were respectively 12. 2% in the asthmatic subjects and 5. 8% in the controls. Significant difference was observed in the allele ( Met764, Thr 764) frequency between the two groups (X-2 = 6. 27,P < 0. 05). The presence of Thr764 allele of ADAM33 gene was found to be a greater risk factor in asthmatic subjects than in controls. The odds ratio( OR) of Met764/Thr764 and Met764/Thr764 + Thr764/Thr764 were 3. 3 89 ( 1. 430 - 8. 030), 2. 767 ( 1. 308 - 5. 854), respectively. When compared with Met764/Met764 genotype, all P < 0.05. There was a significant decrease in the FVC% and FEV, % levels of Met764/Thr764, Thr764/Thr764 and Met764/Met764 genotype. Conclusions These results suggest that Met764Thr locus genetic polymorphism is associated with susceptibility of asthma and clinical indexes of lung function of asthmatic subjects of Han nationality in Southern China.

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Accession: 015093023

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PMID: 17961406



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