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6-methoxytryptophol reduces lipopolysaccharide-induced lipid peroxidation in vitro more effectively than melatonin.
MedLine Citation:
PMID:  22314571     Owner:  NLM     Status:  In-Data-Review    
Bacterial lipopolysaccharide (LPS) causes lipid peroxidation (LPO). We have found that LPS induces LPO in tissue homogenates in vitro in a concentration-dependent manner, the concentration of 400 μg/ml demonstrating the most efficient lipid damaging effect. Antioxidant properties of melatonin are unquestionable and have been proved both in vivo and in vitro. It has been demonstrated that also melatonin metabolites and derivatives inhibit oxidative stress. The aim of our study was to compare the effects of melatonin (MEL) and indole compound: 6-methoxytryptophol, on LPS-induced LPO in vitro. Malondialdehyde (MDA) plus 4-hydroxyalkenal (4-HDA) concentrations were measured as the indicators of induced membrane peroxidative damage in brain, liver and kidney homogenates. Both melatonin and 6-methoxytryptophol were used at increasing concentrations, starting from 0.01-5 mM, together with LPS at one concentration of 400 μg/ml. In all the examined tissues, LPS stimulated LPO, while both melatonin and 6-methoxytryptophol released LPS-stimulated LPO. Furthermore, the capacity of 6-methoxytryptophol reducing LPO was higher than that of melatonin. The results of the reported study clearly indicate that 6-methoxytryptophol is a much stronger antioxidant in vitro than melatonin in terms of reducing oxidative damage to lipid membranes. However, it remains still unclear how the features relate to in vivo circumstances.
E Sewerynek; J A Wiktorska; M Stuss
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of physiology and pharmacology : an official journal of the Polish Physiological Society     Volume:  62     ISSN:  1899-1505     ISO Abbreviation:  J. Physiol. Pharmacol.     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2012-02-08     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9114501     Medline TA:  J Physiol Pharmacol     Country:  Poland    
Other Details:
Languages:  eng     Pagination:  677-83     Citation Subset:  IM    
Department of Endocrine Disorders and Bone Metabolism, Medical University of Lodz, Lodz, Poland.
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