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  • Title: Frequency dependent inhibition of the nicotinic transmission by serotonin in vesical pelvic ganglia of the rabbit.
    Author: Nishimura T, Yoshida M, Nagatsu I, Akasu T.
    Journal: Neurosci Lett; 1989 Aug 28; 103(2):179-84. PubMed ID: 2549470.
    Abstract:
    Intracellular recordings were made from neurons in rabbit vesical pelvic ganglia (VPG), in vitro. Increasing the frequency of preganglionic-nerve stimulations from 0.1-1 Hz to 10-20 Hz facilitated fast excitatory postsynaptic potentials (EPSPs), resulting in a generation of action potentials. Acetylcholine-induced response was not altered during the facilitation of the fast EPSP. Serotonin blocked action potentials elicited by preganglionic-nerve stimulations at 0.1 Hz, while it caused no blockade at 10 Hz. Serotonin may potentiate the feature of high-pass filter in transmission of VPG. Immunohistochemical study demonstrated serotonin-like varicose terminals in rabbit VPG.
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