Sampling and HPLC analysis procedures for CSF amino acid determinations were evaluated. In order to increase sensitivity, a precolumn derivatization of amino acids by o-phthalaldehyde-mercaptoethanoi reagent was used. By using fluorimetric and electrochemical detection in series, positive peak identification can be obtained in a single chromatographic run. It is recommended to analyze freshly collected CSF. Amino acids are stable for short periods over a wide range of temperature, but storage at -80°C is recommended. The CSF samples for the calculation of the reference values were taken from 40 healthy subjects, hospitalized for lumbar disk herniation, placed on the same diet and kept drug-free for at least 1 week. The mean values (μmol/l) and the ranges (in parentheses) were: 0.27 (0.09-0.63), 0.62 (0.18-1.15), 5.32 (3.05-11.50), 6.16 (2.90-13.30), 0.16 (0.03-0.22) for aspartic acid, glutamic acid, glycine, taurine and γ-aminobutyric acid respectively.
Reference values of neuroactive amino acids in the cerebrospinal fluid by high-performance liquid chromatography with electrochemical and fluorescence detection. / Rizzo V, Anesi A, Montalbetti L, Bellantoni G, Trotti R, Melzi d'Eril GV.. - In: JOURNAL OF CHROMATOGRAPHY A. - ISSN 0021-9673. - 729:1-2(1996 Apr), pp. 181-188.
|Titolo:||Reference values of neuroactive amino acids in the cerebrospinal fluid by high-performance liquid chromatography with electrochemical and fluorescence detection.|
|Parole Chiave:||Amino acids; Neurotransmitters|
|Settore Scientifico Disciplinare:||Settore BIO/12 - Biochimica Clinica e Biologia Molecolare Clinica|
|Data di pubblicazione:||apr-1996|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/0021-9673(95)01170-6|
|Appare nelle tipologie:||01 - Articolo su periodico|