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Neuropeptides secreted by i-NANC (VIP) and e-NANC (SP, NKA) efferent fibers of the vagus nerve and returning collaterals of vagus nerve sensory fibers (SP, NKA and CGRP) in the course of asthma; (−) means smooth muscle retraction and bronchodilation; (+) means smooth muscle contraction, bronchoconstriction, mucus hypersecretion, plasma exudation and edema.
