Determination of 4-hydroxynonenal by high-performance liquid chromatography with electrochemical detection.
Lipids
; 28(2): 141-5, 1993 Feb.
Article
em En
| MEDLINE
| ID: mdl-8441339
ABSTRACT
4-Hydroxy-trans-2-nonenal (HNE) is a highly reactive product of lipid peroxidation originating from the break-down of phospholipid-bound polyunsaturated fatty acids of cellular membranes. Despite its biological relevance, this aldehyde is only occasionally determined due to the complexity of previously described procedures. Here we present a simple and very sensitive method for the detection of HNE in biological samples. The method is based on the measurement of the 2,4-dinitrophenylhydrazone (DNPH) of the aldehyde by electrochemical detection after separation by reverse-phase high-performance liquid chromatography (HPLC). The greater sensitivity of this procedure as compared to the ultraviolet detection method commonly employed to measure DNPH derivatives of aldehydes after HPLC will allow the detection of HNE below the pmol level. The detection of HNE is highly reproducible even in normal tissues and cells. Increased amounts of HNE were detected in the livers of animals intoxicated with prooxidant agents such as carbon tetrachloride, bromotrichloromethane or bromobenzene. An exponential increase in HNE (and in malondialdehyde) was measured in peroxidizing liver microsomes (in the NADPH/Fe-dependent system). The method is also suitable for the study of very small samples, since HNE could be detected in approximately 1 million cultured cells (polyoma virus-transformed baby hamster kidney fibroblasts); the level rose after exposure of the cells to a Fe3+/ADP prooxidant system.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cromatografia Líquida de Alta Pressão
/
Aldeídos
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
Idioma:
En
Revista:
Lipids
Ano de publicação:
1993
Tipo de documento:
Article