Location of Airway Inflammation in Asthma and the Relationship to Orcadian Change in Lung Function

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Abstract
Nocturnal asthma is an important part of asthma as the majority of patients with asthma have nocturnal worsening in lung function. The etiology of this process is multifactorial and interactive. There are many naturally occurring circadian rhythms, which for the normal individual have only a minor effect on lung function. However, in the asthmatic patient, these day-to-night alterations produce increased airway inflammation and worsening of asthma. Although asthma is considered an airway disease, the location of the inflammatory response may be greater in the alveolar tissue area. If correct, this could alter the therapeutic approach to this disease.