title: Measurement of lumbar CSF levels of met-enkephalin, encrypted met-enkephalin, and neuropeptide Y in normal patients and in patients with Parkinson's disease before and after autologous transplantation of adrenal medulla into the caudate nucleus.
abstract: The levels in lumbar cerebrospinal fluid (CSF) of neuropeptide Y (NPY), methionine enkephalin (Enk), and Enk contained in amino- and carboxy-terminus extended forms (X-Enk) were examined in nine control patients undergoing elective surgical procedures and in eight patients with advanced Parkinson's disease, before and after the autologous transplantation of adrenal medullary fragments into the right caudate nucleus. The levels of CSF Enk and X-Enk before surgery in patients with Parkinson's disease were significantly less than those observed in control patients (Enk, 166 +/- 38 vs 264 +/- 44 pg/ml; X-Enk, 794 +/- 416 vs 1497 +/- 153 pg/ml). NPY levels did not differ (221 +/- 25 vs 193 +/- 23 pg/ml). After surgery, lumbar CSF samples were taken at 6 weeks, 12 weeks, 6 months, and 9 months. Placement of adrenal medullary fragments into the striatum had no effect on the levels of NPY or Enk at any time point. The levels of X-Enk were significantly enhanced only at 12 weeks (1138 +/- 140 pg/ml) but were at presurgical levels again by 6 months. These data suggest that the transplant was not functionally contributing to the CSF levels of these peptides.
authors.affiliation: Department of Neurosurgery, Mayo Clinic/Foundation, Rochester, Minneosta.
authors.forename: T L
authors.initials: TL
authors.lastname: Yaksh
authors.forename: S W
authors.initials: SW
authors.lastname: Carmichael
authors.forename: S L
authors.initials: SL
authors.lastname: Stoddard
authors.forename: G M
authors.initials: GM
authors.lastname: Tyce
authors.forename: P J
authors.initials: PJ
authors.lastname: Kelly
authors.forename: D
authors.initials: D
authors.lastname: Lucas
authors.forename: J A
authors.initials: JA
authors.lastname: van Heerden
authors.forename: J E
authors.initials: JE
authors.lastname: Ahlskog
authors.forename: D E
authors.initials: DE
authors.lastname: Byer
mesh_terms: D000313:Adrenal Medulla / Q000637:transplantation*; D000328:Adult; D000368:Aged; D002421:Caudate Nucleus / Q000601:surgery*; D004744:Enkephalin, Methionine / Q000134:cerebrospinal fluid*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009478:Neuropeptide Y / Q000134:cerebrospinal fluid*; D010300:Parkinson Disease / Q000134:cerebrospinal fluid* / Q000601:surgery; D013129:Spinal Puncture; D013997:Time Factors; D014182:Transplantation, Autologous
chemical_list: D009478:Neuropeptide Y; D004744:Enkephalin, Methionine