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Do sensory calcitonin gene-related peptide nerve fibres in the rat pelvic plexus supply autonomic neurons projecting to the uterus and cervix?

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机构： [1]Laboratoire de Neurobiologie des Fonctions Ve′ge′ tatives, Institut National de la Recherche Agronomique, F-78352 Jouy-en-Josas Cedex, France

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关键词： Acetylcholine Neuropeptides Paracervical ganglion Parasympathetic neurons Pelvic nerves Rat Uterus

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Sensory nerve fibres containing calcitonin gene-related peptide (CGRP) innervate neurons of the paracervical ganglion (PCG) in the female rat pelvic plexus. We have combined retrograde tracing with immunocytochemistry to investigate whether CGRP-immunoreactive (-IR) fibres supply neurons targeting the genital tract. Of the total neurons projecting to either the uterine horns or the cervix, 38 and 41% received CGRP-IR innervation, respectively. All these neurons displayed choline acetyltransferase-IR, thus are cholinergic. They were found throughout the PCG and other pelvic plexus ganglia, namely accessory ganglia (AG) and hypogastric plexus (HP). Pelvic nerve section showed that afferent fibres in these nerves provided most of the CGRP-IR fibres supplying uterine- or cervical-related neurons in the PCG/AG, none in HP. It is suggested that such sensory-motor network may provide a local pathway for reflex control of genital tract activity, acting through cholinergic nerve projections. © 2002 Elsevier Science Ireland Ltd. All rights reserved.

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大类 | 4 区医学

小类 | 4 区神经科学

第一作者：

第一作者机构： [1]Laboratoire de Neurobiologie des Fonctions Ve′ge′ tatives, Institut National de la Recherche Agronomique, F-78352 Jouy-en-Josas Cedex, France

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通讯机构： [1]Laboratoire de Neurobiologie des Fonctions Ve′ge′ tatives, Institut National de la Recherche Agronomique, F-78352 Jouy-en-Josas Cedex, France

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