Tonic and rhythmic contractions induced by dopamine and related amines in rat vasa deferentia are pharmacologically separable

Lafi, Majid A. K.; Leake, L.D.

doi:10.1016/0742-8413(88)90117-x

Cited by 1 publication

(1 citation statement)

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“…Reactive contractions were achieved by both PE and Ach in our studies, and this finding was compatible with those from other studies (Langton & Huddart, ; Lafi & Leake, ). The finding that PE‐ and Ach‐reactive SV contractions were tonic‐ and phasic‐dominant, respectively, was observed by both the Lee and Clement groups as well (Lee & Suh, ; Clément et al ., ).…”

Section: Discussionsupporting

confidence: 94%

The role of sympathetic and parasympathetic nerve systems on the smooth muscle of rat seminal vesicles – experimental results and speculation for physiological implication on ejaculation

Hsieh

Chang

et al. 2013

Andrology

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SUMMARYEjaculation is a process involving sympathetic and parasympathetic effects during different stages -emission and ejection. Some conditions of ejaculation dysfunction are associated with autonomic nerves. However, the exact effects of autonomic nerves on ejaculation are not well defined. Autonomic agonists induce different recorded trace patterns of seminal vesicular contraction. The different traces contain different components of phasic and tonic contraction, which may have physiological implications. In this study, we examined isolated rat seminal vesicle (SV) contraction by phenylephrine (PE), acetylcholine, and their respective antagonists and then speculated upon physiological roles of sympathetic and parasympathetic nerves on SV during ejaculation. We found that PE and Ach both achieved good contraction of rat SV. Compared to a1b for sympathetic and M1, M2 for parasympathetic receptors, a1a and M3 are the relatively dominant subtypes on rat SV. Adrenergic and cholinergic agonists cause different trace patterns of SV contraction. We speculated that the sympathetic effect is dominant during emission to squeeze seminal fluid out and that the parasympathetic effect is dominant during ejection to provide an anti-reflux effect on the ejaculatory duct.

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Section: Discussionsupporting

confidence: 94%