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Prostaglandin d 2 potentiates cholinergic responsiveness in guinea pig trachea



Prostaglandin d 2 potentiates cholinergic responsiveness in guinea pig trachea



Journal of Autonomic Pharmacology 6(3): 181-186



1 PGD2 dose dependently potentiated the parasympathetic-induced contraction in guinea-pig trachea in vitro. This phenomenon was much more evident in ovalbumin-sensitized guinea-pig trachea. 2 Indomethacin pretreatment enhanced the capacity of PGD2 to potentiate cholinergic-induced contraction in normal but not in ovalbumin-sensitized guinea-pig. 3 PGD2 shifted to the left the curve of the exogenous acetylcholine-induced contraction in guinea-pig trachea, indicating a postsynatptic site of action of PGD2. 4 These data suggest a role of PGD2 in the genesis of hyperreactivity of tracheal smooth muscles, particularly in a model of pulmonary anaphylaxis.

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Accession: 006206872

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