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Influence of season and pollution on the antioxidant defenses of the cichlid fish acará (Geophagus brasiliensis) BJMBR
Wilhelm Filho,D.; Torres,M.A.; Tribess,T.B.; Pedrosa,R.C.; Soares,C.H.L..
The livers of Geophagus brasiliensis collected from both a non-polluted site and a polluted site were analyzed for different antioxidant defenses, O2 consumption, thiobarbituric acid-reactive substance (TBARS) levels, and histological damage. Compared to controls (116.6 ± 26.1 nmol g-1), TBARS levels were enhanced at the polluted site (284.2 ± 25.6 nmol g-1), as also was oxygen consumption (86.6 ± 11.3 and 128.5 ± 9.8 µmol O2 min-1 g-1, respectively). With respect to enzymatic antioxidants, increased catalase activities (8.7 ± 1.3 and 29.2 ± 2.4 mmol min-1 g-1, respectively), unchanged superoxide dismutase activities (767.2 ± 113.3 and 563.3 ± 70.2 U g-1, respectively), and diminished glutathione S-transferase activities (29.0 ± 3.2 and 14.9 ± 3.2 µmol...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oxyradicals; Antioxidant defenses; Fish; Acará; Season; Pollution; Adaptation.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000600004
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Long-term melatonin treatment reduces ovarian mass and enhances tissue antioxidant defenses during ovulation in the rat BJMBR
Chuffa,L.G.A.; Amorim,J.P.A.; Teixeira,G.R.; Mendes,L.O.; Fioruci,B.A.; Pinheiro,P.F.F.; Seiva,F.R.F.; Novelli,E.L.B.; Mello Júnior,W.; Martinez,M.; Martinez,F.E..
Melatonin regulates the reproductive cycle, energy metabolism and may also act as a potential antioxidant indoleamine. The present study was undertaken to investigate whether long-term melatonin treatment can induce reproductive alterations and if it can protect ovarian tissue against lipid peroxidation during ovulation. Twenty-four adult female Wistar rats, 60 days old (± 250-260 g), were randomly divided into two equal groups. The control group received 0.3 mL 0.9% NaCl + 0.04 mL 95% ethanol as vehicle, and the melatonin-treated group received vehicle + melatonin (100 µg·100 g body weight-1·day-1) both intraperitoneally daily for 60 days. All animals were killed by decapitation during the morning estrus at 4:00 am. Body weight gain and body mass index...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Melatonin; Ovary mass; Lipid peroxidation; Antioxidant defenses; Superoxide dismutase.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000300007
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The essential oil from Lippia alba induces biochemical stress in the silver catfish (Rhamdia quelen) after transportation Neotropical Ichthyology
Salbego,Joseânia; Becker,Alexssandro G.; Gonçalves,Jamile F.; Menezes,Charlene C.; Heldwein,Clarissa G.; Spanevello,Rosélia M.; Loro,Vania L.; Schetinger,Maria Rosa C.; Morsch,Vera M.; Heinzmann,Berta M.; Baldisserotto,Bernardo.
This study investigated the effects of the essential oil (EO) from Lippia alba on biochemical parameters related to oxidative stress in the brain and liver of silver catfish (Rhamdia quelen) after six hours of transport. Fish were transported in plastic bags and divided into three treatments groups: control, 30 µL L- 1 EO from L.alba and 40 µL L-1 EO from L.alba. Prior to transport, the fish were treated with the EO from L. alba (200 µL L -1 for three minutes), except for the control group. Fish transported in bags containing the EO did not have any alterations in acetylcholinesterase, ecto -nucleoside triphosphate diphosphohydrolase and 5'nucleotidase activity in the brain or superoxide dismutase activity in the liver. The hepatic catalase (CAT),...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anesthetics; Antioxidant defenses; Biochemical parameters; Fish transport; Oxidative stress.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000400811
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