Abstract
Asthma is a chronic respiratory condition affecting many adults and children. An association between asthma and raised gaseous nitric oxide in the exhaled breath was first reported in 1993. In the absence of an objective test for diagnosing and monitoring asthma, a vigorous research effort has subsequently sought to determine the nature of the relationship between exhaled nitric oxide (ENO) and asthma and to determine the clinical utility of ENO measurements in asthmatics. Many methodological issues relating to ENO measurements have also been addressed. The evidence indicates that ENO originates from a number of sources and the “excess” ENO in asthmatics is mostly derived from the lower respiratory epithelium where ENO probably reflects eosinophilic airway inflammation. Clinical studies have revealed that ENO may be useful in the diagnosis of atopic asthma but not non-atopic asthma. Longitudinal measurements of ENO have been found to correlate with asthma symptoms, including relapse of symptoms after cessation of corticosteroids treatment. In summary, over a relatively short time ENO has become recognised as a useful objective tool for diagnosing and monitoring asthma. More clinical studies will be required in order for ENO to become fully established in the diagnosis and management of asthma.
Keywords: nitric oxide synthase (NOS), inhaled corticosteroids, asthma, airway inflammation, NO metabolism
Mini-Reviews in Medicinal Chemistry
Title: The Role of Exhaled Nitric Oxide in the Diagnosis, Management and Treatment of Asthma
Volume: 7 Issue: 5
Author(s): Steve Turner
Affiliation:
Keywords: nitric oxide synthase (NOS), inhaled corticosteroids, asthma, airway inflammation, NO metabolism
Abstract: Asthma is a chronic respiratory condition affecting many adults and children. An association between asthma and raised gaseous nitric oxide in the exhaled breath was first reported in 1993. In the absence of an objective test for diagnosing and monitoring asthma, a vigorous research effort has subsequently sought to determine the nature of the relationship between exhaled nitric oxide (ENO) and asthma and to determine the clinical utility of ENO measurements in asthmatics. Many methodological issues relating to ENO measurements have also been addressed. The evidence indicates that ENO originates from a number of sources and the “excess” ENO in asthmatics is mostly derived from the lower respiratory epithelium where ENO probably reflects eosinophilic airway inflammation. Clinical studies have revealed that ENO may be useful in the diagnosis of atopic asthma but not non-atopic asthma. Longitudinal measurements of ENO have been found to correlate with asthma symptoms, including relapse of symptoms after cessation of corticosteroids treatment. In summary, over a relatively short time ENO has become recognised as a useful objective tool for diagnosing and monitoring asthma. More clinical studies will be required in order for ENO to become fully established in the diagnosis and management of asthma.
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Cite this article as:
Turner Steve, The Role of Exhaled Nitric Oxide in the Diagnosis, Management and Treatment of Asthma, Mini-Reviews in Medicinal Chemistry 2007; 7 (5) . https://dx.doi.org/10.2174/138955707780619635
DOI https://dx.doi.org/10.2174/138955707780619635 |
Print ISSN 1389-5575 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5607 |
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