Oxidative status of stressed Caenorhabditis elegans treated with epicatechin.
The aim of this work was to examine the mechanisms involved in the in vivo antioxidant effects of epicatechin (EC), a major flavonoid in the human diet. The influence of EC in different oxidative biomarkers (reactive oxygen species (ROS) production, intracellular glutathione, activity of catalase (CAT), glutathione peroxidase (GPx), and superoxide dismutase (SOD)) was studied in the model organism  Caenorhabditis elegans . Under thermal stress condition, exposure of the worms (wild type N2 strains) to EC (200 μM) significantly reduced ROS levels (up to 28%) and enhanced the production of reduced glutathione (GSH). However, no significant changes were appreciated in the activities of GPx, CAT, and SOD, suggesting that further activation of these antioxidant enzymes was not required once the concentration of ROS in the EC-treated worms was restored to what could be considered physiological levels.
Grupo de Investigación en Polifenoles, Unidad de Nutrición y Bromatología, Facultad de Farmacia, Universidad de Salamanca, Campus Miguel de Unamuno, 37007 Salamanca, Spain.
Susana
S
González-Manzano
Ana M
AM
González-Paramás
Laura
L
Delgado
Simone
S
Patianna
Felipe
F
Surco-Laos
Montserrat
M
Dueñas
Celestino
C
Santos-Buelga
D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D017173:Caenorhabditis elegans / Q000187:drug effects* / Q000201:enzymology / Q000235:genetics / Q000378:metabolism; D029742:Caenorhabditis elegans Proteins / Q000235:genetics / Q000378:metabolism; D002392:Catechin / Q000494:pharmacology*; D005978:Glutathione / Q000378:metabolism; D005979:Glutathione Peroxidase / Q000235:genetics / Q000378:metabolism; D006801:Humans; D023421:Models, Animal; D010084:Oxidation-Reduction; D018384:Oxidative Stress / Q000187:drug effects*; D017382:Reactive Oxygen Species / Q000378:metabolism; D013482:Superoxide Dismutase / Q000235:genetics / Q000378:metabolism
D000975:Antioxidants; D029742:Caenorhabditis elegans Proteins; D017382:Reactive Oxygen Species; D002392:Catechin; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D005978:Glutathione