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  • Title: Effects of some prostaglandins on urinary bladder and urethra isolated from the dog.
    Author: Mutoh S, Ueda S, Yano S, Ikegami K, Sakanashi M.
    Journal: Urol Int; 1983; 38(4):219-22. PubMed ID: 6576503.
    Abstract:
    Effects of prostaglandins (PGs) E1, E2, E2 and F2 alpha on the vesical and urethral smooth muscles of dogs were isometrically investigated in vitro. In vesical smooth muscles, 10(-8)-10(-6) PGE1/ml produced biphasic responses in the dome preparations; relaxation at 10(-8) g/ml and contractions at 10(-7)-10(-6) g/ml. In the trigone preparations, 10(-8)-10(-6) g PGE1/ml caused dose-dependent contractions. 10(-8)-10(-6)M g PGE2/ml and 10(-7)-10(-6) g PGF2 alpha /ml induced dose-dependent contractions of the dome and the trigone preparations. In urethral smooth muscles, 10(-8)-10(-6) g PGE1/ml and 10(-8)-10(-6) g PGE2/ml produced dose-dependent relaxations, while 10(-8)-10(-6) g PGF2 alpha /ml caused dose-dependent contractions. Results indicate that PGE, particularly PGE2, is able to stimulate micturition through vesical contraction and urethral relaxation.
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