Cigarette smoke-induced bronchoconstriction: cholinergic mechanisms, tachykinins, and cyclooxygenase products

The mechanisms underlying cigarette smoke-induced bronchoconstriction were studied by using selective blockade of muscarinic acetylcholine receptors, neurokinin receptors and production of eicosanoids of the cyclooxygenase pathway in anesthetized guinea pigs. Inhalation of three breaths of cigarette smoke (University of Kentucky research series 2R1; 2.45 mg of nicotine and 35.3 mg of tar per cigarette) reproducibly induced an immediate …