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Sympathetic axons surround neuropeptide‐negative axotomized sensory neurons

 

作者: Matt Ramer,   Mark Bisby,  

 

期刊: NeuroReport  (OVID Available online 1998)
卷期: Volume 9, issue 13  

页码: 3109-3113

 

ISSN:0959-4965

 

年代: 1998

 

出版商: OVID

 

关键词: Calcitonin gene-related peptide;Dorsal root ganglion;Galanin;Neuropathic pain;Neuropeptide Y;Substance P;Tyrosine hydroxylase;Vasoactive intestinal polypeptide

 

数据来源: OVID

 

摘要:

NERVE injury can lead to sympathetically dependent neuropathic pain. A possible site of sympathetic—sensory interaction is the dorsal root ganglion (DRG), where sympathetic axons form pericellular ‘baskets’ around a subpopulation of DRG neurons. Since these structures possibly represent functional units of sympathetic pain, we attempted to characterize the neuropeptidergic phenotype of basketed DRG neurons. We performed double-labeling immunohistochemistry for tyrosine hydroxylase and neuropeptides on DRG sections, 2 weeks following L5 spinal nerve ligation (a well-characterized animal model of sympathetic pain). We found that basketed DRG neurons typically do not contain substance P, calcitonin gene-related peptide, galanin, neuropeptide tyrosine, or vasoactive intestinal polypep-tide, and we conclude that if sympathetic baskets contribute to neuropathic pain, the involvement of these neuropeptides is unimportant.

 

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