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Haplotype analysis of the endothelial nitric oxide synthase gene in asthma.

Authors: Holla, LI  Jurajda, M  Pohunek, P  Znojil, V 
Citation: Holla LI, etal., Hum Immunol. 2008 Apr-May;69(4-5):306-13. Epub 2008 Apr 15.
Pubmed: (View Article at PubMed) PMID:18486767
DOI: Full-text: DOI:10.1016/j.humimm.2008.03.003

Nitric oxide (NO) is an important mediator of physiologic processes in the airways. Evidence exists that genetic factors affect NO formation and contribute to the pathophysiology of asthma. The aims of this study were to determine the endothelial NO synthase (eNOS) haplotypes in Czech asthmatics and control subjects and examine their relation to asthma. We analyzed a total of six polymorphisms. Two SNPs in the promoter (C-786T and C-691T), two variants in the introns (27-bp repeat in intron 4 and G11T in intron 23), and two others in the exons (C774T in exon 6 and G894T in exon 7) were genotyped in 610 subjects (asthma, n = 294; healthy controls, n = 316), and a case-control association study was conducted. No significant differences in allele or genotype frequencies for individual polymorphisms were observed between patients with asthma and controls after correction for multiple comparisons. Nevertheless, a G to T exchange in intron 23 was related with specific sensitization for feather (p = 0.008, p(corr) < 0.05). However, the common haplotype -786T/-691C/27-bp 5 repeat variant/774C/894G/11T was associated with lower risk of asthma (p = 0.001, p(corr) < 0.05, odds ratio = 0.58, 95% confidence interval = 0.46-0.73). These findings suggest that endothelial NOS variants may be one of the factors participating in protection or susceptibility to asthma in our population.

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CRRD Object Information
CRRD ID: 4892053
Created: 2011-01-31
Species: All species
Last Modified: 2011-01-31
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.