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[ROLE OF MAST CELLS IN BRONCHIAL CONTRACTION IN NONALLERGIC OBSTRUCTIVE LUNG PATHOLOGY].
Rossiĭskii Fiziologicheskiĭ Zhurnal Imeni I.M. Sechenova 2017 Februrary
In model of chronic obstructive pulmonary disease induced in rats by 60-day intermittent exposure to nitrogen dioxide mast cells participation in the mechanism of bronchial smooth muscle contractile activity patterns was evaluated. Since the 31st day, one group of rats was inhaled with sodium cromoglycate every day before the nitrogen dioxide exposure to stabilize the mast cell membrane. The other group (control) hasn’t been treated. Isometric contraction of the bronchial isolated preparations in response to nerve or smooth muscle stimulation were determined. Inhibition of mast cell degranulation and the release of endogenous histamine by stabilizing cell membranes prevented the development of bronchial smooth muscle hyperactivity caused by prolonged inhalation of nitrogen dioxide. It is believed that a mechanism to increase the contractile activity of the bronchial wall smooth muscles is mediated by activation of the transmembrane adenosine receptor in resident mast cells, leading to their partial degranulation with release of histamine, acting on the histamine Hl-receptors with the launch of reflex pathways through intramural ganglion neurons.
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