Abstract
The impact of mechanical forces on pathogenesis of airway remodeling and the functional consequences in asthma remains to be fully established. In the present study, we investigated the effect of repeated bronchoconstriction induced by methacholine (MCh) on airway remodeling and airway hyperresponsiveness (AHR) in rats with or without sensitization to an external allergen. We provide evidence that repeated bronchoconstriction, using MCh, alone induces airway inflammation and remodeling as well as AHR in non-allergen-sensitized rats. Also, we found that the airways are structurally and functionally altered by bronchoconstriction induced by either allergen or MCh in allergen-sensitized animals. This finding provides a new animal model for the development of airway remodeling and AHR in mammals and can be used for studying the complex reciprocal relationship between bronchoconstriction and airway inflammation. Further studies on presented animal models are required to clarify the exact mechanisms underlying airway remodeling due to bronchoconstriction and the functional consequences.
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Funding
This work was supported by grants from the Tarbiat Modares University to Mehdi Eslami-Behroozi.
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The authors declare that they have no conflict of interest.
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All the protocols for the care and use of animals were approved by the “Ethical Committee of Tarbiat Modares University”.
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Eslami-Behroozi, M., Pazhoohan, S., Aref, E. et al. Bronchoconstriction Induces Structural and Functional Airway Alterations in Non-sensitized Rats. Lung 195, 167–171 (2017). https://doi.org/10.1007/s00408-016-9970-4
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DOI: https://doi.org/10.1007/s00408-016-9970-4