Abstract
Bronchial asthma is characterised by an eosinophilic inflammatory process in the airways, and manifests itself functionally by bronchial hyperresponsiveness and variable airflow obstruction. In the past this inflammatory process was presumed to be predominantly present in the large and intermediate airways. This is not surprising since functional abnormalities in the small airways (or so-called silent zone) are much more difficult to establish in comparison to changes in the larger airways. As a consequence, changes in airway calibre and bronchial hyperresponsiveness are mainly measured in the central part of the lung, i.e. by means of the FEV1 at rest or after challenge with bronchoconstrictive stimuli like histamine and methacholine. Recently, advanced physiological, radiological and morphological studies show that the inflammatory process extends to the peripheral airways and even the alveolar compartment. This so-called peripheral inflammation is related to the clinical manifestation of the severity of asthma. Targeting the small airways with new inhaled corticosteroids with a small particle size and a high peripheral deposition may result in better control of the disease. The presence and clinical consequences of peripheral inflammation and its therapeutic approach are discussed in this review.
Keywords: asymptomatic asthma, inflammatory process, CFC-free solution, nitric oxide (NO), oral corticosteroids
Current Drug Therapy
Title: Drug Targeting in Bronchial Asthma: Inhaled Corticosteroids Should Reach the Peripheral Airways
Volume: 1 Issue: 3
Author(s): P.N.R. Dekhuijzen
Affiliation:
Keywords: asymptomatic asthma, inflammatory process, CFC-free solution, nitric oxide (NO), oral corticosteroids
Abstract: Bronchial asthma is characterised by an eosinophilic inflammatory process in the airways, and manifests itself functionally by bronchial hyperresponsiveness and variable airflow obstruction. In the past this inflammatory process was presumed to be predominantly present in the large and intermediate airways. This is not surprising since functional abnormalities in the small airways (or so-called silent zone) are much more difficult to establish in comparison to changes in the larger airways. As a consequence, changes in airway calibre and bronchial hyperresponsiveness are mainly measured in the central part of the lung, i.e. by means of the FEV1 at rest or after challenge with bronchoconstrictive stimuli like histamine and methacholine. Recently, advanced physiological, radiological and morphological studies show that the inflammatory process extends to the peripheral airways and even the alveolar compartment. This so-called peripheral inflammation is related to the clinical manifestation of the severity of asthma. Targeting the small airways with new inhaled corticosteroids with a small particle size and a high peripheral deposition may result in better control of the disease. The presence and clinical consequences of peripheral inflammation and its therapeutic approach are discussed in this review.
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Cite this article as:
Dekhuijzen P.N.R., Drug Targeting in Bronchial Asthma: Inhaled Corticosteroids Should Reach the Peripheral Airways, Current Drug Therapy 2006; 1 (3) . https://dx.doi.org/10.2174/157488506778194938
DOI https://dx.doi.org/10.2174/157488506778194938 |
Print ISSN 1574-8855 |
Publisher Name Bentham Science Publisher |
Online ISSN 2212-3903 |
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