title: Heteropteris aphrodisiaca O. Machado : effects of extract BST 0298 on the oxidative stress of young and old rat brains.
abstract: The plant Heteropteris aphrodisiaca O. Machado is widely employed in Brazilian popular medicine as a stimulant, a tonic and a remedy for nervous debility. Several other plant products with similar therapeutic applications may have such effects based on the antioxidant content of polyphenols (gallates, cathecols, etc.) and flavonoids. The aim of this work was to investigate the effects of Heteropteris aphrodisiaca O. Machado extracts on the antioxidant defences and oxidative stress of young and old rat brains. Tests of lipoperoxidation in vitro, comparing H. aphrodisiaca extracts with butylhydroxytoluene (BHT), a classic antioxidant, showed an efficient inhibition of lipoperoxidation (Q(1/2) = 3.3 microg/mL). Chronic treatment of young and old rats with 50 mg plant extract/kg body weight resulted in a significant increase in superoxide dismutase (SOD) activities (40%) in the brain of old rats, but no changes in catalase and glutathione peroxidase (GPX). No significant variations in antioxidant enzyme activities were observed in the brains of young rats. However, significantly lower levels of lipoperoxidation (30%) were detected in the brain of young rats upon plant extract administration, suggesting that H. aphrodisiaca extracts reduced the oxidative stress to brain lipids.
authors.affiliation: Departamento de Psicobiologia, Universidade Federal de São Paulo, UNIFESP, São Paulo, Brazil. mattei@psicobio.epm.br
authors.forename: R
authors.initials: R
authors.lastname: Mattei
authors.forename: M
authors.initials: M
authors.lastname: Paz Barros
authors.forename: S M
authors.initials: SM
authors.lastname: Galvão
authors.forename: E J
authors.initials: EJ
authors.lastname: Bechara
authors.forename: E L
authors.initials: EL
authors.lastname: de Araujo Carlini
mesh_terms: D000375:Aging; D000818:Animals; D001921:Brain / Q000187:drug effects* / Q000201:enzymology; D015227:Lipid Peroxidation / Q000187:drug effects*; D008297:Male; D018384:Oxidative Stress / Q000187:drug effects*; D008517:Phytotherapy; D010936:Plant Extracts / Q000494:pharmacology*; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal; D051381:Rats; D017208:Rats, Wistar; D013482:Superoxide Dismutase / Q000187:drug effects
chemical_list: C444599:BST 0298; D010936:Plant Extracts; D013482:Superoxide Dismutase