顺行追踪
降钙素基因相关肽
三叉神经节
解剖
轴突
逆行追踪
神经节
三叉神经
超微结构
神经肽
神经科学
生物
上颌神经
化学
感觉系统
中枢神经系统
病理
医学
受体
替代医学
生物化学
作者
Henny J. M. Beckers,Jan Klooster,Gijs F.J.M. Vrensen,W.P.M.A. Lamers
出处
期刊:Brain Research
[Elsevier]
日期:1991-08-01
卷期号:557 (1-2): 22-30
被引量:23
标识
DOI:10.1016/0006-8993(91)90111-8
摘要
Trigeminal nerve terminals in the rat pterygopalatine ganglion (PPG) were ultrastructurally identified using anterograde tracing withPhaseolus vulgaris-leucoagglutinin (PHA-L). Electron microscopic immunohistochemistry was used to demonstrate the presence of substance P (SP) and calcitonin gene-related peptide (CGRP) in nerve terminals of the PPG. Adjacent to the rostral part of the PPG an additional minor area was described. Perikarya in this minor rostral part were more spherical and had irregular outlines. Ultrastructurally, the glial enwrapment of the nerve terminals seemed to be more loosely arranged in comparison to that in the major rostral part of the PPG. With PHA-L, numerous labelled nerve fibres and terminals were found in all parts of the PPG. The ultrastructure of these terminals was uniform, many of them showing synaptic contacts. Numerous terminals in the PPG were SP-positive, whereas only a few were CGRP-positive. Fibres stained positive for both neuropeptides. The PPG is shown to be synaptically innervated by sensory fibres arising in the trigeminal ganglion, with the strong suggestion of SP and CGRP acting as neurotransmitters. A modulatory interaction between the autonomic and sensory system, resembling an axon reflex mechanism in the peripheral nervous system is endorsed.
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