RGD Reference Report - MMP-9 gene variants increase the risk for non-atopic asthma in children. - Rat Genome Database

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MMP-9 gene variants increase the risk for non-atopic asthma in children.

Authors: Pinto, LA  Depner, M  Klopp, N  Illig, T  Vogelberg, C  Von Mutius, E  Kabesch, M 
Citation: Pinto LA, etal., Respir Res. 2010 Feb 24;11:23.
RGD ID: 5130859
Pubmed: PMID:20181264   (View Abstract at PubMed)
PMCID: PMC2838833   (View Article at PubMed Central)
DOI: DOI:10.1186/1465-9921-11-23   (Journal Full-text)

BACKGROUND: Atopic and non-atopic wheezing may be caused by different etiologies: while eosinophils are more important in atopic asthmatic wheezers, neutrophils are predominantly found in BAL samples of young children with wheezing. Both neutrophils as well as eosinophils may secrete matrix metalloproteinase 9 (MMP-9). Considering that MMP-9 plays an important role in airway wall thickening and airway inflammation, it may influence the development of obstructive airway phenotypes in children. In the present study we investigated whether genetic variations in MMP-9 influence the development of different forms of childhood asthma. METHODS: Genotyping of four HapMap derived tagging SNPs in the MMP-9 gene was performed using MALDI-TOF MS in three cross sectional study populations of German children (age 9-11; N = 4,264) phenotyped for asthma and atopic diseases according to ISAAC standard procedures. Effects of single SNPs and haplotypes were studied using SAS 9.1.3 and Haploview. RESULTS: SNP rs2664538 significantly increased the risk for non-atopic wheezing (OR 2.12, 95%CI 1.40-3.21, p < 0.001) and non-atopic asthma (OR 1.66, 95%CI 1.12-2.46, p = 0.011). Furthermore, the minor allele of rs3918241 may be associated with decreased expiratory flow measurements in non-atopic children. No significant effects on the development of atopy or total serum IgE levels were observed. CONCLUSIONS: Our results have shown that homozygocity for MMP-9 variants increase the risk to develop non-atopic forms of asthma and wheezing, which may be explained by a functional role of MMP-9 in airway remodeling. These results suggest that different wheezing disorders in childhood are affected differently by genetic alterations.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
asthma  IAGP 5130859DNA:SNP: : rs2664538(human) RGD 
asthma  ISOMMP9 (Homo sapiens)5130859; 5130859DNA:SNP: : rs2664538(human) RGD 

Objects Annotated

Genes (Rattus norvegicus)
Mmp9  (matrix metallopeptidase 9)

Genes (Mus musculus)
Mmp9  (matrix metallopeptidase 9)

Genes (Homo sapiens)
MMP9  (matrix metallopeptidase 9)


Additional Information