Abstract
The possible role of prostaglandins in the mediation and/or modulation of the urethral response to vesical distension was investigated in female dogs. Three criteria for the possible involvement of these mediators have been investigated. Indomethacin could block the reduction of urethral resistance observed during vesical distension. Intra-arterial infusion of exogenous prostaglandin E2 resulted in a dose-dependent reduction in the urethral resistance to flow. Moreover, a significant release of prostaglandin E2 in the venous blood during the course of vesical distension could be demonstrated. The functional significance, mechanisms of release and mode of action of these highly active lipids are discussed.
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