title: Aspartate, glutamate, glutamine, glycine and gamma-aminobutyric acid in human bioptic neocortical areas: comparison to autoptic tissue.
abstract: Amino acid concentrations were determined by high performance liquid chromatography in distinct areas of human neocortex of autoptic and bioptic origin. The concentrations in autoptic tissue were similar in all cortical areas which may be explained by postmortem proteolysis, abolishing regional differences seen in bioptic tissue. Aspartate, glutamate, glycine and gamma-aminobutyric acid concentrations were lower, but glutamine levels were higher, in biopsied than in autopsied tissue. Glycine and gamma-aminobutyric acid concentrations increased with the age of biopsied patients. The differences seen suggest that only amino acid concentrations determined in bioptic tissue may yield a reliable data base for the interpretation of pathological alterations in neocortical biopsies of patients with brain diseases.
authors.affiliation: Sektion Klinische Neuropharmakologie der Neurologischen Universitätsklinik, Neurozentrum, Freiburg, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Knörle
authors.forename: D
authors.initials: D
authors.lastname: Assmann
authors.forename: G B
authors.initials: GB
authors.lastname: Landwehrmeyer
authors.forename: R
authors.initials: R
authors.lastname: Scheremet
authors.forename: K
authors.initials: K
authors.lastname: Müller
authors.forename: T J
authors.initials: TJ
authors.lastname: Feuerstein
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging / Q000378:metabolism; D001344:Autopsy; D001706:Biopsy; D002540:Cerebral Cortex / Q000737:chemistry* / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D018377:Neurotransmitter Agents / Q000378:metabolism*; D011180:Postmortem Changes; D013048:Specimen Handling; D009764:o-Phthalaldehyde
chemical_list: D018377:Neurotransmitter Agents; D009764:o-Phthalaldehyde