Scavenging Capacity of Marine Carotenoids against Reactive Oxygen and Nitrogen Species in a Membrane-Mimicking SystemReportar como inadecuado




Scavenging Capacity of Marine Carotenoids against Reactive Oxygen and Nitrogen Species in a Membrane-Mimicking System - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Department of Food Science, Faculty of Food Engineering, University of Campinas UNICAMP, Rua Monteiro Lobato, 80, CEP 13083-862, Campinas, São Paulo 13083-970, Brazil





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Abstract Carotenoid intake has been associated with the decrease of the incidence of some chronic diseases by minimizing the in vivo oxidative damages induced by reactive oxygen ROS and nitrogen species RNS. The carotenoids are well-known singlet oxygen quenchers; however, their capacity to scavenge other reactive species, such as peroxyl radical ROO•, hydroxyl radical HO•, hypochlorous acid HOCl and anion peroxynitrite ONOO−, still needs to be more extensively studied, especially using membrane-mimicking systems, such as liposomes. Moreover, the identification of carotenoids possessing high antioxidant capacity can lead to new alternatives of drugs or nutritional supplements for prophylaxis or therapy of pathological conditions related to oxidative damages, such as cardiovascular diseases. The capacity to scavenge ROO•, HO•, HOCl and ONOO− of seven carotenoids found in marine organisms was determined in liposomes based on the fluorescence loss of a fluorescent lipid C11-BODIPY581-591 due to its oxidation by these reactive species. The carotenoid-bearing hydroxyl groups were generally more potent ROS scavengers than the carotenes, whilst β-carotene was the most efficient ONOO− scavenger. The role of astaxanthin as an antioxidant should be highlighted, since it was a more potent scavenger of ROO•, HOCl and ONOO− than α-tocopherol. View Full-Text

Keywords: liposomes; astaxanthin; carotenoids; ROS; RNS liposomes; astaxanthin; carotenoids; ROS; RNS





Autor: Eliseu Rodrigues, Lilian R. B. Mariutti and Adriana Z. Mercadante *

Fuente: http://mdpi.com/



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