title: Pharmacological activity of South American plants: effects on spontaneous in vivo lipid peroxidation.
abstract: The in vivo protective effects of methanol extracts of eight South American medicinal plants traditionally used as antiinflammatory were determined by means of spontaneous lipid peroxidation of liver tissue in rats. The production of TBARS was reduced in a dose dependent manner for A. macrocarpa (IC50 = 132 mg/kg), A. urundeuva (IC50 = 176 mg/kg), C. reticulata (IC50 = 561mg/kg) and S. obtusifolium (IC50 = 918 mg/kg). The extracts of P. peltata and U. tomentosa were only effective at a high concentration (300 mg/kg), although these values were not significant. The lyophilized latex of C. lechleri decreased the production of TBARS at a 200 mg/kg dose, although pro-oxidant effects were observed at lower doses (50 mg/kg). The extract of H. pallida was pro-oxidant at lower concentrations (50 mg/kg).
authors.affiliation: Instituto de Química y Metabolismo del Fármaco (IQUIMEFA-CONICET), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956 (1113), Buenos Aires, Argentina.
authors.forename: Cristian J
authors.initials: CJ
authors.lastname: Desmarchelier
authors.forename: Silvia B
authors.initials: SB
authors.lastname: de Moraes Barros
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D001938:Brazil; D004305:Dose-Response Relationship, Drug; D020128:Inhibitory Concentration 50; D015227:Lipid Peroxidation / Q000187:drug effects*; D008099:Liver / Q000187:drug effects; D008519:Medicine, Traditional; D051379:Mice; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D010946:Plants, Medicinal; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism
chemical_list: D000975:Antioxidants; D010936:Plant Extracts; D017392:Thiobarbituric Acid Reactive Substances