Simultaneous determination of total and extracellular concentrations of the amino acid neurotransmitters in cat visual cortex by microbore liquid chromatography and electrochemical detection

Journal of Chromatography. a
Y QuF Vandesande

Abstract

To investigate the influence of a partial sensory deprivation on the total and extracellular concentration of the amino acid neurotransmitters in cat visual cortex, two microbore HPLC methods were developed for the simultaneous determination of aspartate, glutamate, glycine, taurine and gamma-aminobutyric acid in cat brain extracts or microdialysis samples. For the determination of the total neurotransmitter concentrations in the visual cortex, the brains were quickly frozen and 200-microns cryostat sections were made. From these sections tissue samples of 2 x 2 mm2 containing the six cortical layers were dissected out of the central and peripheral parts of area 17. After homogenisation and centrifugation, the supernatants were used for quantitative amino acid analysis using an o-phthalaldehyde-tert.-butylthiol pre-column derivatisation HPLC gradient elution method on a microbore column (100 x 1 mm I.D.; C8) and single electrochemical detection. Microdialysis samples from area 17 were obtained every 15 min using 2-mm probes perfused with synthetic cerebrospinal fluid at a flow-rate of 1 microliter/min. After o-phthalaldehyde-tert.-butylthiol derivatisation they were analysed on a microbore column by isocratic elution and dual e...Continue Reading

Citations

Oct 15, 2013·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Patrizia VoehringerBoris Ferger
Mar 29, 2001·Brain Research. Brain Research Protocols·Y QuE Vandenbussche
Nov 27, 2002·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Shifen MouYongjian Liu
Apr 23, 2003·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·M Y Khuhawar, A D Rajper
Dec 21, 2000·The European Journal of Neuroscience·L ArckensG A Orban

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