Methylated Genes in Sputum Among Older Smokers With Asthma.

Chest
Akshay SoodYohannes Tesfaigzi

Abstract

The epigenetic basis for human asthma is not well studied, particularly among older adults. This study investigated the methylation profiles in sputum DNA among older adults with asthma, using a population of smokers. This was a cross-sectional study using the Lovelace Smokers Cohort, a population of former and current smokers aged ≥ 40 years in New Mexico. One hundred eighty-four smokers with asthma were compared with 511 smoker control subjects with a similar smoking history, after carefully excluding those with COPD. Environmental exposures were assessed by a standard questionnaire. Postbronchodilator spirometry was performed. Induced sputum was analyzed for the methylation prevalence of 12 selected asthma-related genes using nested methylation-specific polymerase chain reaction assay. Asthma was associated with a greater number of methylated genes and, specifically, with methylated protocadherin-20 gene in sputum DNA compared with control subjects with a similar smoking history. These associations remained significant after adjustment for covariates as well as Bonferroni correction. A synergistic interaction was noted between two methylated genes (protocadherin-20 and paired box protein transcription factor-5α) in sputum DN...Continue Reading

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Nov 29, 2013·Epigenomics·Gabrielle A LockettWilfried Karmaus
Dec 18, 2012·Current Opinion in Allergy and Clinical Immunology·Wilfried KarmausJohn W Holloway
Apr 17, 2013·Current Opinion in Allergy and Clinical Immunology·Ioana O Agache
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Mar 31, 2021·Clinical Epigenetics·Mojgan SheikhpourVahid Amiri

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