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Theophylline and mucociliary clearance Ziment IChest 1987[Jul]; 92 (1 Suppl): 38S-43SAbnormal mucociliary transport is improvement by the action of theophylline, and this effect can be attributed to several mechanisms. The drug may directly and indirectly mediate the increase in the secretory output of bronchial glands, and this effect is enhanced by the vagal gastropulmonary reflex which is stimulated by the irritant action of theophylline on the stomach. Theophylline can increase the transepithelial secretion of fluid into the respiratory tract lumen by stimulating the chloride pump which is controlled by cyclic AMP. Ciliary motility is stimulated by theophylline; most of this effect is confined to the proximal part of the respiratory tree. However, much of the improvement in mucociliary clearance may be a consequence of the bronchodilation induced by theophylline, since the improved airway patency is generally a prerequisite for enhanced mucokinesis. Nevertheless, the multiple sites of action of theophylline in the respiratory tract suggests that this drug should be considered to be of significant value in any disorder characterized by mucostasis.|Aminophylline/therapeutic use[MESH]|Animals[MESH]|Asthma/drug therapy[MESH]|Bronchitis/drug therapy[MESH]|Cilia/drug effects/*physiology[MESH]|Clinical Trials as Topic[MESH]|Dogs[MESH]|Humans[MESH]|Lung Diseases, Obstructive/drug therapy/metabolism/physiopathology[MESH]|Movement[MESH]|Mucus/drug effects/*metabolism[MESH]|Rats[MESH]|Respiratory System/*drug effects/physiopathology[MESH]|Theophylline/*pharmacology/therapeutic use[MESH] |
