Alpha1 antitrypsin and the prevalence and severity of asthma.

von Ehrenstein, O S; Maier, E M; Weiland, S K; Carr, D; Hirsch, T; Nicolai, T; Roscher, A A; von Mutius, E · Arch Dis Child · 2004

cross_sectional · Level IV

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Abstract

In a random sample of children (aged 9-11 years; n = 5629), who were studied according to the ISAAC phase II protocol, heterozygosity of the alpha1 antitrypsin (alpha1-AT) Pi genotypes MS or MZ, or low alpha1-AT plasma levels, were not associated with an increased risk of developing asthma. Asthmatics with low levels of alpha1-AT were particularly prone to develop airway hyperresponsiveness and reduced lung function.

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