摘要

This study extensively examined the role of a 5-HT1A receptor in controlling voiding function in anesthetized male rats. A simultaneous recording of the intravesical pressure (IVP), external urethral sphincter (EUS)-electromyography (EMG), and urine flow rate (UFR) during continuous cystometry was used. 8-Hydroxy-2-(di-n-propylamino)-tetralin (8-OH-DPAT), a 5-HT1A receptor agonist, significantly improved the voiding efficiency, as detected by increases in the evoked contraction amplitude, EUS burst period, and silent period, and decreases in the volume threshold, pressure threshold, and residual volume. Interestingly, the UFR during voiding was reduced by 8-OH-DPAT, as evidenced by decreases in the maximal UFR and mean UFRs of the voiding period, spike duration, and interspike interval. Conversely, treating rats with WAY-100635, a 5-HT1A antagonist, produced effects opposite to those produced by 8-OH-DPAT. These findings suggest that 8-OH-DPAT improved the voiding efficiency by enhancing the detrusor contractile ability and prolonging EUS burst period, which would compensate for the lower UFR, resulting from urethral smooth muscle contractions and longer EUS silent periods during voiding. The present study contributes to our understanding of the role of 5-HT1A receptors in controlling the urine flow rate in male rats.
原文英語
頁(從 - 到)R1239-R1250
期刊American Journal of Physiology - Regulatory Integrative and Comparative Physiology
307
發行號10
DOIs
出版狀態已發佈 - 十一月 15 2014

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)
  • Medicine(all)

指紋 深入研究「Influence of serotonergic mechanisms on the urine flow rate in male rats」主題。共同形成了獨特的指紋。

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