Identification and measurement of kynurenic acid in the rat brain and other organs.
Anal Biochem
; 169(1): 89-94, 1988 Feb 15.
Article
em En
| MEDLINE
| ID: mdl-3369691
ABSTRACT
Kynurenic acid, a biologically active tryptophan metabolite, has been identified and measured in the rat brain and other organs using HPLC and GC/MS. Both the described methods required extraction of the compound in alkaline ethanol and initial purification on Dowex ion-exchange resins. The GC/MS approach used 3-hydroxy-2-naphthoic acid as an internal standard and a derivatization procedure with diazomethane and trifluoroacetic anhydride. The HPLC procedure was performed on a reverse-phase column using a spectrophotometric detector. Both the GC/MS and the HPLC methods had the lowest detection limit in the range of 10 pmol/injection, but the variability of the results was lower when HPLC was used. HPLC analysis showed the content of kynurenic acid to be 14 +/- 2 pmol/g wet wt in the brain, 75 +/- 7 in the heart, 87 +/- 8 in the liver, and 298 +/- 10 in the kidneys. Comparable but variable values were obtained with GC/MS.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Química Encefálica
/
Ácido Cinurênico
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Anal Biochem
Ano de publicação:
1988
Tipo de documento:
Article
País de afiliação:
Itália