The effect of melatonin and structural analogues on the lipid peroxidation of triglycerides enriched in omega-3 polyunsaturated fatty acids.
Life Sci
; 81(4): 299-305, 2007 Jul 04.
Article
em En
| MEDLINE
| ID: mdl-17603083
The lipid peroxidation of triglycerides enriched in polyunsaturated fatty acids was investigated by photoemission techniques and the TBARS assay. Butylated hydroxytoluene, 5-OH-tryptophan and N-acetylserotonin inhibited light emission and TBARS formation in a concentration dependent manner. However, it was enhanced in the presence of melatonin and 5-methoxytryptamine and was dependent on its concentration. The total relative luminic units were found to be lower in those systems incubated in the presence of butylated hydroxytoluene, N-acetylserotonin or 5-OH-tryptophan; this decreased proportionally to the concentration of the compound tested. The order of inhibition was 5-OH-tryptophan>N-acetylserotonin>butylated hydroxytoluene with the following IC50 values: 0.65, 6.5 and 9.0 mM respectively. The free-radical scavenging activity of the indole derivatives was also analyzed by the DPPH method, and the results indicate that 5-OH-tryptophan, and N-acetylserotonin exhibited a dose-dependent free-radical scavenging ability at all of the tested concentrations. Thus, at 10 microM concentration a decrease of 84.71% and 73.50% of initial DPPH was observed, compared to 51.00% of BHT. Melatonin and 5-methoxytriptamine decreased the initial concentration of DPPH only 1.85% and 5.0%, respectively. The possible formation of N(1)-acetyl-N(2) formyl-5-methoxykynuramine (AFMK) during lipid peroxidation of triglycerides enriched in PUFAs with cumene hydroperoxide in the presence of melatonin was also analyzed.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Triglicerídeos
/
Hidroxitolueno Butilado
/
Peroxidação de Lipídeos
/
Ácidos Graxos Ômega-3
/
Melatonina
Idioma:
En
Revista:
Life Sci
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Argentina
País de publicação:
Holanda