title: Neuropeptides in the human intervertebral disc.
abstract: The innervation of the human intervertebral disc was investigated by immunochemical methods. Immunoreactivity to the general nerve marker protein gene product (PGP 9.5) was found in the outer annulus fibrosus of 11 of 12 discs removed during anterior arthrodesis for back pain. PGP 9.5-immunoreactive fibres ran between and across the collagenous lamellae, both in association with blood vessels and distant from them, and extended at least 3 mm into the disc. No innervation was observed in the nucleus pulposus. Fine fibres (< 1 micron in diameter) immunoreactive to calcitonin gene-related peptide and substance P (neuropeptides located in sensory and possibly nociceptive nerves) were identified in eight and four of the annuli fibrosi, respectively. Nerve fibres immunoreactive to vasoactive intestinal peptide and to the c-flanking peptide of neuropeptide Y were found in the majority of specimens of annulus fibrosus that were examined.
authors.affiliation: Centre for Spinal Studies, Robert Jones and Agnes Hunt Orthopaedic Hospital, Oswestry, Shropshire; England.
authors.forename: I K
authors.initials: IK
authors.lastname: Ashton
authors.forename: S
authors.initials: S
authors.lastname: Roberts
authors.forename: D C
authors.initials: DC
authors.lastname: Jaffray
authors.forename: J M
authors.initials: JM
authors.lastname: Polak
authors.forename: S M
authors.initials: SM
authors.lastname: Eisenstein
mesh_terms: D000328:Adult; D015740:Calcitonin Gene-Related Peptide / Q000032:analysis; D005260:Female; D006801:Humans; D007403:Intervertebral Disc / Q000737:chemistry* / Q000294:innervation; D008297:Male; D008875:Middle Aged; D009479:Neuropeptides / Q000032:analysis*; D013869:Thiolester Hydrolases / Q000032:analysis; D043222:Ubiquitin Thiolesterase; D014660:Vasoactive Intestinal Peptide / Q000032:analysis
chemical_list: D009479:Neuropeptides; D014660:Vasoactive Intestinal Peptide; D013869:Thiolester Hydrolases; D043222:Ubiquitin Thiolesterase; D015740:Calcitonin Gene-Related Peptide