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Polymorphisms of the ADAM33 gene are associated with accelerated lung function decline in asthma
H Jongepier1, H M Boezen, A Dijkstra
1Department of Pulmonary Diseases, University Hospital, Groningen, The Netherlands.
Background:
Asthma is a genetically complex disease characterized by respiratory symptoms, intermittent airway obstruction and airway hyper-responsiveness due to airway inflammation and remodelling. The ADAM33 gene is associated with asthma and airway hyper-responsiveness and is postulated as a gene for airway remodelling.
Objective:
To investigate whether polymorphisms of the ADAM33 gene are associated with accelerated lung function decline in patients with asthma.
Methods:
In a cohort of 200 asthma patients followed over 20 years, eight single nucleotide polymorphisms of the ADAM33 gene were analysed to estimate their effect on annual FEV(1) decline.
Results:
The rare allele of the S_2 polymorphism was significantly associated with excess decline in FEV(1) (P<0.05).
Conclusion:
These findings suggest that a variant in ADAM33 is not only important in the development of asthma but also in disease progression, possibly related to enhanced airway remodelling.
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