Abstract
Neurogenic inflammation, due to release of neuropeptides from sensory nerves, has been demonstrated in airways of several species, particularly rodents, and may contribute to the inflammatory response in asthmatic airways. Tachykinins (substance P and neurokinin A) and calcitonin-gene-related peptide released from airway sensory nerves may cause bronchoconstriction, vasodilatation, plasma exudation and mucus secretion. Sensory nerves may become sensitised by inflammatory products and triggered by mediators such as bradykinin, resulting in exaggerated inflammation. The effects of tachykinins may be further amplified by loss of the major degrading enzyme, neutral endopeptidase, from epithelial cells. Several strategies for reducing neurogenic inflammation are possible.
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