title: Melatonin prevents changes in microsomal membrane fluidity during induced lipid peroxidation.
abstract: We tested the effect of melatonin on membrane fluidity in microsomes of a rat liver model in which lipid peroxidation was induced by the addition of FeCl3, ADP and NADPH. Membrane fluidity was monitored using fluorescence spectroscopy and lipid peroxidation was estimated by quantifying malonaldehyde (MDA)+4-hydroxyalkenals (4-HDA) concentrations following the induction of lipid peroxidation with and without pre-incubation with melatonin (1 microM-3 mM). Membrane rigidity increased during induced lipid peroxidation while melatonin reduced in a concentration-dependent manner both membrane rigidity and MDA+4-HDA generation. Melatonin's protective effect may relate to its known ability to scavenge free radicals and function as an antioxidant.
authors.affiliation: Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, 78284-7762, USA.
authors.forename: J J
authors.initials: JJ
authors.lastname: García
authors.forename: R J
authors.initials: RJ
authors.lastname: Reiter
authors.forename: J M
authors.initials: JM
authors.lastname: Guerrero
authors.forename: G
authors.initials: G
authors.lastname: Escames
authors.forename: B P
authors.initials: BP
authors.lastname: Yu
authors.forename: C S
authors.initials: CS
authors.lastname: Oh
authors.forename: A
authors.initials: A
authors.lastname: Muñoz-Hoyos
mesh_terms: D000244:Adenosine Diphosphate / Q000378:metabolism; D000818:Animals; D002712:Chlorides; D005290:Ferric Compounds / Q000494:pharmacology; D007425:Intracellular Membranes / Q000187:drug effects / Q000378:metabolism*; D007700:Kinetics; D015227:Lipid Peroxidation / Q000187:drug effects*; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism; D008550:Melatonin / Q000494:pharmacology*; D008560:Membrane Fluidity / Q000187:drug effects*; D008862:Microsomes, Liver / Q000378:metabolism*; D009249:NADP / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D002712:Chlorides; D005290:Ferric Compounds; D008315:Malondialdehyde; D009249:NADP; D000244:Adenosine Diphosphate; D008550:Melatonin; C024555:ferric chloride