Delta pioid receptor immunoreactive boutons appose bulbospinal CI neurons in the rat
作者:
Tina Stasinopoulos,
Ann Goodchild,
Macdonald Christie,
John Chalmers,
Paul Pilowsky,
期刊:
NeuroReport
(OVID Available online 2000)
卷期:
Volume 11,
issue 4
页码: 887-891
ISSN:0959-4965
年代: 2000
出版商: OVID
关键词: Bulbospinal;Dopamine-β-hydroxylase;Opioid receptor;Phenylethanolamine-N-methyltransferase;Presympathetic neurons;Retrograde tracing;Rostral ventrolateral medulla
数据来源: OVID
摘要:
Bulbospinal sympathoexcitatory neurons in the rostral ventrolateral medulla are inhibited by activation of delta opioid receptors. However, it is not known whether this opioidergic effect is pre- or post- synaptic. Here, using retrograde tracing and immunocytochemistry in adult rats, we provide evidence that the delta opioid receptor is located on boutons that are presynaptic to both catecholaminergic and non-catecholaminergic neurons that project to the spinal cord. We suggest that the sympathoinhibitory action of delta opioid receptor activation in the rostral ventrolateral medulla is mediated presynaptically, resulting in a reduction of excitatory neurotransmitter release from boutons that appose sympathoexcitatory bulbospinal neurons.
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