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Association of MBL2 polymorphism with asthma after bronchiolitis in infancy.

Authors: Koponen, P  He, Q  Helminen, M  Nuolivirta, K  Korppi, M 
Citation: Koponen P, etal., Pediatr Int. 2012 Oct;54(5):619-22. doi: 10.1111/j.1442-200X.2012.03651.x. Epub 2012 Jul 19.
Pubmed: (View Article at PubMed) PMID:22512728
DOI: Full-text: DOI:10.1111/j.1442-200X.2012.03651.x

BACKGROUND: Mannose-binding lectin (MBL) is a component of innate immunity and has been linked with the pathogenesis of asthma. The aim of the present study was to evaluate the association of MBL genotypes with preschool asthma and allergy in children with bronchiolitis in early infancy. METHODS: In all, 205 infants were hospitalized for bronchiolitis at <6 months of age. Asthma and allergy were studied from a total of 166 children at 6.4 years (mean). A total of 141 (85%) frozen whole blood samples were available for MBL genotyping and MBL2 gene mutations were determined on pyrosequencing for detection of three single-nucleotide polymorphisms. RESULTS: Ninety-five children (67.4%) had the wild-type MBL genotype A/A and 46 had A/O or O/O genotypes. Asthma was present in 16 children (11.3%) at 5-7 years of age. Nine children (19.6%) with non-AA genotype had asthma (vs 7.4% of those with genotype AA, P= 0.03). The result remained significant after adjustment for age, gender and atopy. There were no significant associations between MBL genotypes and asthma at any age before the study. Atopic dermatitis, allergic rhinitis or paternal and/or maternal asthma had no significant associations with MBL genotypes. CONCLUSIONS: The variant non-A/A MBL genotype is associated with asthma after bronchiolitis in infancy, but not earlier than at 5-7 years of age.

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CRRD Object Information
CRRD ID: 8693709
Created: 2014-07-18
Species: All species
Last Modified: 2014-07-18
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.