title: Chronic lithium treatment has antioxidant properties but does not prevent oxidative damage induced by chronic variate stress.
abstract: This study evaluated the effects of chronic stress and lithium treatments on oxidative stress parameters in hippocampus, hypothalamus, and frontal cortex. Adult male Wistar rats were divided into two groups: control and submitted to chronic variate stress, and subdivided into treated or not with LiCl. After 40 days, rats were killed, and lipoperoxidation, production free radicals, total antioxidant reactivity (TAR) levels, and superoxide dismutase (SOD) and glutathione peroxidase (GPx) activities were evaluated. The results showed that stress increased lipoperoxidation and that lithium decreased free radicals production in hippocampus; both treatments increased TAR. In hypothalamus, lithium increased TAR and no effect was observed in the frontal cortex. Stress increased SOD activity in hippocampus; while lithium increased GPx in hippocampus and SOD in hypothalamus. We concluded that lithium presented antioxidant properties, but is not able to prevent oxidative damage induced by chronic variate stress.
authors.affiliation: Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas da Saúde, UFRGS, Porto Alegre, RS, Brazil. anavasco21@hotmail.com
authors.forename: Ana Paula Santana
authors.initials: AP
authors.lastname: de Vasconcellos
authors.forename: Fabiane Battistela
authors.initials: FB
authors.lastname: Nieto
authors.forename: Leonardo Machado
authors.initials: LM
authors.lastname: Crema
authors.forename: Luisa Amália
authors.initials: LA
authors.lastname: Diehl
authors.forename: Lúcia Maria
authors.initials: LM
authors.lastname: de Almeida
authors.forename: Martha Elisa
authors.initials: ME
authors.lastname: Prediger
authors.forename: Elizabete Rocha
authors.initials: ER
authors.lastname: da Rocha
authors.forename: Carla
authors.initials: C
authors.lastname: Dalmaz
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D005625:Frontal Lobe / Q000378:metabolism; D005979:Glutathione Peroxidase / Q000378:metabolism; D006624:Hippocampus / Q000378:metabolism; D007031:Hypothalamus / Q000378:metabolism; D015227:Lipid Peroxidation; D018020:Lithium Compounds / Q000008:administration & dosage / Q000378:metabolism; D008297:Male; D018384:Oxidative Stress; D051381:Rats; D017208:Rats, Wistar; D017382:Reactive Oxygen Species / Q000378:metabolism; D013315:Stress, Psychological / Q000378:metabolism*; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D000975:Antioxidants; D018020:Lithium Compounds; D017382:Reactive Oxygen Species; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase