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Delwing-de Lima D, Sasso S, Delwing-Dal Magro D, Pereira NR, Rodrigues AF, Schmitz F, Manoel Pereira E, Schramm do Nascimento MA, Wyse ATS. In vitro galactose impairs energy metabolism in the brain of young rats: protective role of antioxidants. NUCLEOSIDES, NUCLEOTIDES & NUCLEIC ACIDS 2023; 42:967-985. [PMID: 37317977 DOI: 10.1080/15257770.2023.2222776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 06/04/2023] [Indexed: 06/16/2023]
Abstract
We, herein, investigated the in vitro effects of galactose on the activity of pyruvate kinase, succinate dehydrogenase (SDH), complex II and IV (cytochrome c oxidase) of the respiratory chain and Na+K+-ATPase in the cerebral cortex, cerebellum and hippocampus of 30-day-old rats. We also determined the influence of the antioxidants, trolox, ascorbic acid and glutathione, on the effects elicited by galactose. Galactose was added to the assay at concentrations of 0.1, 3.0, 5.0 and 10.0 mM. Control experiments were performed without galactose. Galactose, at 3.0, 5.0 and 10.0 mM, decreased pyruvate kinase activity in the cerebral cortex and at 10.0 mM in the hippocampus. Galactose, at 10.0 mM, reduced SDH and complex II activities in the cerebellum and hippocampus, and reduced cytochrome c oxidase activity in the hippocampus. Additionally, decreased Na+K+-ATPase activity in the cerebral cortex and hippocampus; conversely, galactose, at 3.0 and 5.0 mM, increased this enzyme's activity in the cerebellum. Data show that galactose disrupts energy metabolism and trolox, ascorbic acid and glutathione addition prevented the majority of alterations in the parameters analyzed, suggesting the use of antioxidants as an adjuvant therapy in Classic galactosemia.
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Affiliation(s)
- Daniela Delwing-de Lima
- Department of Medicine, University of Joinville Region, Joinville, Santa Catarina, Brazil
- Post-Graduation Program in Health and Environment, University of Joinville Region, Joinville, Santa Catarina, Brazil
| | - Simone Sasso
- Post-Graduation Program in Health and Environment, University of Joinville Region, Joinville, Santa Catarina, Brazil
| | - Débora Delwing-Dal Magro
- Department of Natural Sciences, Center of Exact and Natural Sciences, Regional University of Blumenau, Blumenau, Santa Catarina, Brazil
| | - Nariana Regina Pereira
- Department of Pharmacy, University of Joinville Region, Joinville, Santa Catarina, Brazil
| | - André Felipe Rodrigues
- Department of Biochemistry, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
- Max Delbrück Center (MDC), Berlin, Germany
| | - Felipe Schmitz
- Department of Biochemistry, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Eduardo Manoel Pereira
- Department of Pharmacy, University of Joinville Region, Joinville, Santa Catarina, Brazil
| | | | - Angela T S Wyse
- Department of Biochemistry, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
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Delwing-de Lima D, Fröhlich M, Dalmedico L, Aurélio JGM, Delwing-Dal Magro D, Pereira EM, Wyse ATS. Galactose alters markers of oxidative stress and acetylcholinesterase activity in the cerebrum of rats: protective role of antioxidants. Metab Brain Dis 2017; 32:359-368. [PMID: 27714582 DOI: 10.1007/s11011-016-9915-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 09/23/2016] [Indexed: 12/27/2022]
Abstract
We evaluated the in vitro effects of galactose at 0.1, 3.0, 5.0 and 10.0 mM on thiobarbituric acid-reactive substances (TBA-RS), total sulfhydryl content, protein carbonyl content, on the activities of the antioxidant enzymes catalase (CAT), superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) and on acetylcholinesterase (AChE) activity in the cerebral cortex, cerebellum and hippocampus of rats. We also investigated the influence of the antioxidants (each at 1 mM), α-tocopherol, ascorbic acid and glutathione, on the effects elicited by galactose on the parameters tested. Results showed that galactose, at a concentration of 3.0 mM, enhanced TBA-RS levels in the hippocampus, cerebral cortex and cerebellum of rats. In the cerebral cortex, galactose at concentrations of 5.0 and 10.0 mM increased TBA-RS and protein carbonyl content, and at 10.0 mM increased CAT activity and decreased AChE activity. In the cerebellum, galactose at concentrations of 5.0 and 10.0 mM increased TBA-RS, SOD and GSH-Px activities. In the hippocampus, galactose at concentrations of 5.0 and 10.0 mM increased TBA-RS and CAT activity and at 10.0 mM decreased GSH-Px. Data showed that at the pathologically high concentration (greater than 5.0 mM), galactose induces lipid peroxidation, protein carbonylation, alters antioxidant defenses in the cerebrum, and also alters cholinesterase activity. Trolox, ascorbic acid and glutathione addition prevented the majority of alterations in oxidative stress parameters and the decrease in AChE activity that were caused by galactose. Our findings lend support to a potential therapeutic strategy for this condition, which may include the use of appropriate antioxidants for ameliorating the damage caused by galactose.
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Affiliation(s)
- Daniela Delwing-de Lima
- Departamento de Medicina, Universidade da Região de Joinville- UNIVILLE, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, SC, CEP 89201-972, Brazil
- Programa de Pós-Graduação em Saúde e Meio Ambiente, Universidade da Região de Joinville- UNIVILLE, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, SC, CEP 89201-972, Brazil
| | - Monique Fröhlich
- Programa de Pós-Graduação em Saúde e Meio Ambiente, Universidade da Região de Joinville- UNIVILLE, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, SC, CEP 89201-972, Brazil
| | - Leticia Dalmedico
- Departamento de Farmácia, Universidade da Região de Joinville- UNIVILLE, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, SC, CEP 89201-972, Brazil
| | - Juliana Gruenwaldt Maia Aurélio
- Departamento de Farmácia, Universidade da Região de Joinville- UNIVILLE, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, SC, CEP 89201-972, Brazil
| | - Débora Delwing-Dal Magro
- Departamento de Ciências Naturais, Centro de Ciências Exatas e Naturais, Universidade Regional de Blumenau, Rua Antônio da Veiga, 140, Blumenau, SC, CEP 89012-900, Brazil
| | - Eduardo Manoel Pereira
- Departamento de Farmácia, Universidade da Região de Joinville- UNIVILLE, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, SC, CEP 89201-972, Brazil
| | - Angela T S Wyse
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, Brazil
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3
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Delwing-de Lima D, Hennrich SB, Delwing-Dal Magro D, Aurélio JGM, Serpa AP, Augusto TW, Pereira NR. The effect of d-galactose induced oxidative stress on in vitro redox homeostasis in rat plasma and erythrocytes. Biomed Pharmacother 2017; 86:686-693. [DOI: 10.1016/j.biopha.2016.12.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 11/23/2016] [Accepted: 12/05/2016] [Indexed: 10/20/2022] Open
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4
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Manosso LM, Neis VB, Moretti M, Daufenbach JF, Freitas AE, Colla AR, Rodrigues ALS. Antidepressant-like effect of α-tocopherol in a mouse model of depressive-like behavior induced by TNF-α. Prog Neuropsychopharmacol Biol Psychiatry 2013; 46:48-57. [PMID: 23816813 DOI: 10.1016/j.pnpbp.2013.06.012] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 06/17/2013] [Accepted: 06/18/2013] [Indexed: 02/07/2023]
Abstract
Taking into account that pro-inflammatory cytokines and oxidative and nitrosative stress are implicated in the pathogenesis of depression and that α-tocopherol has antidepressant, anti-inflammatory and antioxidant properties, this study investigated the ability of α-tocopherol to abolish the depressive-like behavior induced by i.c.v. administration of TNF-α in the mouse TST. Additionally, we investigated the occurrence of changes in the levels of Bcl2 and Bax and phosphorylation of GSK-3β (Ser9) in the hippocampus of mice. The administration of TNF-α (0.001fg/site, i.c.v.) increased the immobility time in the TST, which was prevented by the administration of α-tocopherol at the doses of 10, 30 and 100mg/kg (p.o.). Subeffective doses of α-tocopherol (10mg/kg, p.o.) and/or the antidepressants fluoxetine (5mg/kg, p.o.), imipramine (0.1mg/kg, p.o.) and bupropion (1mg/kg, p.o.), the NMDA receptor antagonist MK-801 (0.001mg/kg, p.o.) or the neuronal nitric oxide synthase inhibitor 7-nitroindazole (25mg/kg, i.p.) prevented the depressive-like effect induced by TNF-α. None of the treatments altered the locomotor activity of mice. Treatment with TNF-α and/or α-tocopherol did not alter the levels of Bax and Bcl2 or the phosphorylation of GSK-3β in the hippocampus of mice. Together, our results show a synergistic antidepressant-like effect of α-tocopherol with antidepressants against the depressive-like behavior induced by an inflammatory insult, suggesting that this vitamin may be useful to optimize conventional pharmacotherapy of depression, including depressive states associated with inflammatory conditions.
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Affiliation(s)
- Luana M Manosso
- Department of Biochemistry, Center of Biological Sciences, Universidade Federal de Santa Catarina, Florianópolis, 88040-900, SC, Brazil
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Exposure to low dose of cinnabar (a naturally occurring mercuric sulfide (HgS)) caused neurotoxicological effects in offspring mice. J Biomed Biotechnol 2012; 2012:254582. [PMID: 22888198 PMCID: PMC3408718 DOI: 10.1155/2012/254582] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Accepted: 05/24/2012] [Indexed: 11/17/2022] Open
Abstract
Cinnabar, a naturally occurring mercuric sulfide (HgS), has long been used in Chinese mineral medicine for more than 2000 years. Although mercury is well-known for its toxicity, whether cinnabar induces neurotoxicity, especially in infants and children, is unknown. The purpose of this study was to explore the neurotoxic effects of low-dose of cinnabar (10 mg/kg/day) on developing mice. The results revealed neurobehavioral defects in F1-C-Cin group, which were associated with Hg accumulation, increased NO(x) levels in whole blood, and Na(+)/K(+)-ATPase activities in brain tissues. F1- and F2-Cin-V groups were found to increase brain Hg contents and prominent neurobehavioral defects compared with F1-C-V group, suggesting that the fetal brain was more susceptible to irreversible effects for cinnabar-induced damage. Moreover, F1- and F2-Cin-Cin groups had severely neurobehavioral dysfunctions, closely correlated with the further alteration of NO(x) levels and Na(+)/K(+)-ATPase activities than F1- and F2-C-Cin groups. Effects in F2-Cin-Cin group were more significant than those in F1-Cin-Cin group. In conclusion, this study demonstrates that exposure to low-dose of cinnabar during the perinatal and developmental stages results in irreversible and severe injuries of the neurotoxicity in offspring, and NO(x) and Na(+)/K(+)-ATPase activities may exist potential and useful biomarkers for neurotoxicity-induced by low-doses of mercuric compounds.
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Spermidine decreases Na⁺,K⁺-ATPase activity through NMDA receptor and protein kinase G activation in the hippocampus of rats. Eur J Pharmacol 2012; 684:79-86. [PMID: 22497998 DOI: 10.1016/j.ejphar.2012.03.046] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Revised: 03/19/2012] [Accepted: 03/23/2012] [Indexed: 11/22/2022]
Abstract
Spermidine is an endogenous polyamine with a polycationic structure present in the central nervous system of mammals. Spermidine regulates biological processes, such as Ca(2+) influx by glutamatergic N-methyl-d-aspartate receptor (NMDA receptor), which has been associated with nitric oxide synthase (NOS) and cGMP/PKG pathway activation and a decrease of Na(+),K(+)-ATPase activity in rats' cerebral cortex synaptosomes. Na(+),K(+)-ATPase establishes Na(+) and K(+) gradients across membranes of excitable cells and by this means maintains membrane potential and controls intracellular pH and volume. However, it has not been defined whether spermidine modulates Na(+),K(+)-ATPase activity in the hippocampus. In this study we investigated whether spermidine alters Na(+),K(+)-ATPase activity in slices of hippocampus from rats, and possible underlying mechanisms. Hippocampal slices and homogenates were incubated with spermidine (0.05-10 μM) for 30 min. Spermidine (0.5 and 1 μM) decreased Na(+),K(+)-ATPase activity in slices, but not in homogenates. MK-801 (100 and 10 μM), a non-competitive antagonist of NMDA receptor, arcaine (0.5μM), an antagonist of the polyamine binding site at the NMDA receptor, and L-NAME (100μM), a NOS inhibitor, prevented the inhibitory effect of spermidine (0.5 μM). ODQ (10 μM), a guanylate cyclase inhibitor, and KT5823 (2 μM), a protein kinase G inhibitor, also prevented the inhibitory effect of spermidine on Na(+),K(+)-ATPase activity. Spermidine (0.5 and 1.0 μM) increased NO(2) plus NO(3) (NOx) levels in slices, and MK-801 (100 μM) and arcaine (0.5 μM) prevented the effect of spermidine (0.5 μM) on the NOx content. These results suggest that spermidine-induced decrease of Na(+),K(+)-ATPase activity involves NMDA receptor/NOS/cGMP/PKG pathway.
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7
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Alekseenko AV, Lemeshchenko VV, Pekun TG, Waseem TV, Fedorovich SV. Glutamate-induced free radical formation in rat brain synaptosomes is not dependent on intrasynaptosomal mitochondria membrane potential. Neurosci Lett 2012; 513:238-42. [PMID: 22387155 DOI: 10.1016/j.neulet.2012.02.051] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 02/07/2012] [Accepted: 02/14/2012] [Indexed: 10/28/2022]
Abstract
Glutamate induces reactive oxygen species formation (ROS) in neurons. Free radicals can potentially be synthesized by NADPH oxidase or mitochondria. The primary source of ROS origin has yet to be identified. In addition, pro-oxidant action of glutamate receptors on neuronal presynaptic terminals is still not characterized. We investigated the influence of glutamate and agonists of its ionotropic receptors on ROS formation detected by fluorescent dye DCFDA in rat brain synaptosomes. Glutamate in concentration 10 and 100μM led to an increase of probe fluorescence pointing to free radical accumulation. This effect was mimicked by 100μM of NMDA or 100μM of kainate. Glutamate-induced ROS formation was sensitive to NMDA inhibitors MK-801 (10μM), NO synthase (NOS) inhibitor l-NAME (100μM) and NADPH oxidase inhibitors DPI (30μM) and not affected by mitochondrial uncoupler CCCP (10μM) and mitochondrial toxins rotenone (10μM)+oligomycin (5μg/ml). We also showed that 100μM of glutamate leads to a decrease of intrasynaptosomal mitochondrial potential monitored by fluorescent dye Rhodamine-123. Hence, the depolarization of intrasynaptosomal mitochondria is not a primary cause of glutamate-induced ROS formation in neuronal presynaptic terminals. Activation of NMDA receptors might be responsible for a certain part of glutamate pro-oxidant action. Most likely, sources of glutamate-induced ROS formation in neuronal presynaptic terminals are NADPH oxidase and NOS activation.
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Affiliation(s)
- Aleksandra V Alekseenko
- Laboratory of Biophysics and Engineering of Cell, Institute of Biophysics and Cell Engineering, Akademicheskaya St., 27, Minsk 220072, Belarus
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8
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The Role of Nitric Oxide in Homocysteine Thiolactone-Induced Seizures in Adult Rats. Cell Mol Neurobiol 2009; 30:219-31. [DOI: 10.1007/s10571-009-9444-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Accepted: 08/11/2009] [Indexed: 12/24/2022]
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9
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Ototoxicity induced by cinnabar (a naturally occurring HgS) in mice through oxidative stress and down-regulated Na+/K+-ATPase activities. Neurotoxicology 2008; 29:386-96. [DOI: 10.1016/j.neuro.2008.01.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2007] [Revised: 01/11/2008] [Accepted: 01/25/2008] [Indexed: 11/22/2022]
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10
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Delwing D, Stefanello FM, Perry MLS, Wyse ATS. Inhibition of CO(2) production from glucose by arginine in brain slices of rats. Metab Brain Dis 2007; 22:145-55. [PMID: 17516157 DOI: 10.1007/s11011-007-9053-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2006] [Accepted: 03/08/2007] [Indexed: 10/23/2022]
Abstract
In the present study we evaluated the in vivo effect of arginine on CO(2) production from glucose in a medium with physiological and high extracellular K(+) concentrations. We also tested the influence of the nitric oxide synthase inhibitor, N(omega)-nitro-L-arginine methyl ester (L-NAME), on the effects elicited by arginine in order to investigate the possible participation of NO and/or its derivatives on the effects of arginine on CO(2) production from glucose. Sixty-day-old rats were treated with a single intraperitoneal injection of saline (control; group I), arginine (0.8 g/kg; group II), L-NAME (2.0 mg/kg; group III) or arginine (0.8 g/kg) plus L-NAME (2.0 mg/kg; group IV) and were killed 1 h later. Results showed that arginine administration inhibited CO(2) production from glucose at physiological extracellular K(+) concentration and L-NAME prevented such effect. In contrast, arginine administration had no effect on CO(2) production from glucose at high extracellular K(+) concentration. Based on these data, we also investigated the in vitro effect of arginine on CO(2) production from glucose in a medium with physiological extracellular K(+) concentration in hippocampus slices. Results showed that arginine (0.1-1.5 mM) when added to the incubation medium did not alter CO(2) production from glucose in hippocampus slices of untreated rats. In addition, we also demonstrated that arginine inhibits Na(+), K(+)-ATPase activity. The data indicate that the reduction of CO(2) production by arginine was probably mediated by NO and/or its derivatives, which could act inhibiting the activity of Na(+), K(+)-ATPase. The results suggest that arginine impairs energy metabolism in hippocampus slices of rats.
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Affiliation(s)
- Débora Delwing
- Departamento de Bioquímica, ICBS, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, CEP 90035-003 Porto Alegre, Rio Grande do Sul, Brazil
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11
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Streck EL, Feier G, Búrigo M, Franzon R, Dal-Pizzol F, Quevedo J, Wyse ATS. Effects of electroconvulsive seizures on Na+,K+-ATPase activity in the rat hippocampus. Neurosci Lett 2006; 404:254-7. [PMID: 16797841 DOI: 10.1016/j.neulet.2006.06.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2006] [Revised: 05/23/2006] [Accepted: 06/01/2006] [Indexed: 11/25/2022]
Abstract
Although several advances have occurred concerning the use of electroconvulsive therapy, little progress has been made in understanding the mechanisms underlying its therapeutic or side effects. Na(+),K(+)-ATPase is an important enzyme of central nervous system, responsible for ionic gradient maintenance and consumption of approximately 40-50% of brain ATP. This work was performed in order to determine Na(+),K(+)-ATPase activity after acute and chronic electroconvulsive shock. Results showed an inhibition of Na(+),K(+)-ATPase activity in the hippocampus 48 h, 7, 30, 60 and 90 days after a single electroconvulsive shock. Chronic treatment diminished the enzyme activity in the hippocampus 7 and 30 days after electroconvulsive (ECS) sessions. Our findings demonstrated that Na(+),K(+)-ATPase activity is altered by ECS.
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Affiliation(s)
- Emilio L Streck
- Laboratório de Bioquímica Experimental, Universidade do Extremo Sul Catarinense, 88806-000 Criciúma, SC, Brazil.
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12
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Effects of two-vessel forebrain ischemia and of administration of indomethacin and quinacrine on Na+, K+-ATPase activity in various rat brain areas. J EVOL BIOCHEM PHYS+ 2005. [DOI: 10.1007/s10893-005-0033-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Zugno AI, Franzon R, Chiarani F, Bavaresco CS, Wannmacher CMD, Wajner M, Wyse ATS. Evaluation of the mechanism underlying the inhibitory effect of guanidinoacetate on brain Na
+
, K
+
‐ATPase activity. Int J Dev Neurosci 2004; 22:191-6. [PMID: 15245754 DOI: 10.1016/j.ijdevneu.2004.05.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2004] [Revised: 05/03/2004] [Accepted: 05/04/2004] [Indexed: 11/15/2022] Open
Abstract
Guanidinoacetate methyltransferase deficiency (GAMT-deficiency) is an inherited neurometabolic disorder clinically characterized by epilepsy and mental retardation and biochemically by accumulation of guanidinoacetate (GAA) and depletion of creatine. Although the neurological symptoms are predominant, the pathogenesis of the brain dysfunction in this disorder is not yet established. In the present study we investigated the in vitro effect of GAA on Na+, K+-ATPase and Mg2+-ATPase activities in synaptic plasma membrane from hippocampus of young rats. Results showed that GAA significantly inhibited Na+, K+-ATPase activity without affecting Mg2+-ATPase activity. We also evaluated the effect of glutathione (GSH), trolox, Nomega-nitro-L-arginine methyl ester (L-NAME) and taurine (Tau) on the inhibition elicited by GAA on Na+, K+-ATPase activity. GSH, trolox, L-NAME and Tau per se did not alter Na+, K+-ATPase activity. However, L-NAME and taurine prevented the inhibitory effect of GAA on this enzyme activity. Our findings suggest that the inhibition of Na+, K+-ATPase activity caused by GAA is possibly mediated by nitric oxide (NO) formation and/or synaptic membrane alteration. The present data may contribute to the understanding of the neurological dysfunction characteristic of GAMT-deficient patients.
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Affiliation(s)
- Alexandra I Zugno
- Departamento de Bioquímica, ICBS, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, CEP 90035-003, Porto Alegre, RS, Brazil
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14
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Franzon R, Lamers ML, Stefanello FM, Wannmacher CMD, Wajner M, Wyse ATS. Evidence that oxidative stress is involved in the inhibitory effect of proline on Na(+),K(+)-ATPase activity in synaptic plasma membrane of rat hippocampus. Int J Dev Neurosci 2003; 21:303-7. [PMID: 12927578 DOI: 10.1016/s0736-5748(03)00076-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
In the present study, we investigated the effect of Vitamins E and C on the inhibition of Na(+),K(+)-ATPase activity provoked by proline (Pro) administration in rat hippocampus. Five-day-old rats were pretreated for 1 week with daily i.p. administration of saline (control) or Vitamin E (40 mg/kg) and Vitamin C (100 mg/kg). Twelve hours after the last injection, animals received one single injection of Pro (12.8 micromol/g of body weight) or saline and were killed 1h later. Results showed that Na(+),K(+)-ATPase activity was decreased in the Pro-treated rats and that the pretreatment with Vitamins E and C prevented this effect. In another set of experiments, we investigated the in vitro effect of 1.0 mM Pro on Na(+),K(+)-ATPase activity from synaptic membranes of hippocampus of rats. Pro significantly inhibited (30%) Na(+),K(+)-ATPase activity. We also evaluated the effect of preincubating glutathione, trolox and N(pi)-nitro-L-arginine methyl ester (L-NAME) alone or combined with Pro on Na(+),K(+)-ATPase activity. Tested drugs did not alter Na(+),K(+)-ATPase activity, but glutathione prevented the inhibitory effect of Pro on this enzyme activity. These results suggest that the in vivo and in vitro inhibitory effect of Pro on Na(+),K(+)-ATPase activity is probably mediated by free radicals that may be involved in the neurological dysfunction found in hyperprolinemic patients.
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Affiliation(s)
- Renata Franzon
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo CEP 90035-003, Porto Alegre, RS, Brazil
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15
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dos Reis EA, de Oliveira LS, Lamers ML, Netto CA, Wyse ATDS. Arginine administration inhibits hippocampal Na+,K+-ATPase activity and impairs retention of an inhibitory avoidance task in rats. Brain Res 2002; 951:151-7. [PMID: 12270492 DOI: 10.1016/s0006-8993(02)03077-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
In the present study we investigated the effect of acute administration of L-arginine (Arg) on hippocampal Na(+),K(+)-ATPase activity and on retrieval of step-down inhibitory avoidance in adult rats. The action of L-NAME on the effects produced by Arg was also tested. Sixty-day-old rats were treated with a single intraperitoneal injection of saline (group I, control), arginine (0.8 g/kg) (group II), L-NAME (2 mg/kg) (group III) or arginine (0.8 g/kg) plus L-NAME (2 mg/kg) (group IV). Na(+),K(+)-ATPase activity was significantly reduced in arginine-treated rats; this effect was prevented by L-NAME. Retrieval of the avoidance task was also significantly impaired by arginine, whereas the simultaneous injection of L-NAME prevented this effect. Present data strongly indicate that in vivo Arg administration reduces both Na(+),K(+)-ATPase activity and memory modulation in rats probably through NO formation.
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Affiliation(s)
- Eleonora Araújo dos Reis
- Departamento de Bioquímica, ICBS, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, CEP 90035-003, RS, Porto Alegre, Brazil
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16
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Avrova NF, Zakharova IO, Tyurin VA, Tyurina YY, Gamaley IA, Schepetkin IA. Different metabolic effects of ganglioside GM1 in brain synaptosomes and phagocytic cells. Neurochem Res 2002; 27:751-9. [PMID: 12374210 DOI: 10.1023/a:1020296605444] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The metabolic effects of ganglioside GM1 were found to be quite different in brain synaptosomes and phagocytic cells. Incubation of rat brain cortex synaptosomes with GM1 was shown to decrease the production of reactive oxygen species induced by Fe2+-H2O2 system and measured by chemiluminometric method in the presence of luminol. Gangliosides GM1, GD1a, and GT1b significantly diminished the induced accumulation of lipid peroxidation product in brain synaptosomes, but protein kinase inhibitor (polymyxin B) abolished this effect. Incubation with antioxidants or GM1 significantly diminished the increase of 45Ca2+ influx and oxidative inactivation of Na+,K+-ATPase in brain synaptosomes exposed to glutamate, the effect of GM1 was concentration-dependent in the range 10(-11)-10(-8) M. But the incubation of human neutrophils and mouse peritoneal macrophages with 10(-11)-10(-10) M GM1, on the contrary, increased several times the luminol-dependent chemiluminescence response of these cells to activation by low concentrations of 12-myristate-13-acetate phorbol ester. The opposite effects of GM1 in the nerve endings and phagocytic cells seem to be protective in both cases as the inhibition of reactive oxygen species production in the nerve cells may enhance their viability in damaged brain, while the intensification of their production in phagocytic cells may promote the resistance of organism to infection.
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Affiliation(s)
- N F Avrova
- Department of Comparative Neurochemistry, I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry of Russian Ac. Sci., Saint-Petersburg, Russian Federation.
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Wyse AT, Bavaresco CS, Bandinelli C, Streck EL, Franzon R, Dutra-Filho CS, Wajner M. Nitric oxide synthase inhibition by L-NAME prevents the decrease of Na+,K+-ATPase activity in midbrain of rats subjected to arginine administration. Neurochem Res 2001; 26:515-20. [PMID: 11513478 DOI: 10.1023/a:1010912929042] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In the present study we investigated the effect of acute administration of L-arginine on Na(+),K(+)-ATPase and Mg(2+)-ATPase activities and on some parameters of oxidative stress (chemiluminescence and total radical-trapping antioxidant parameter-TRAP) in midbrain of adult rats. We also tested the effect of L-NAME on the effects produced by arginine. Sixty-day-old rats were treated with an acute intraperitoneal injection of saline (group I, control), arginine (0.8 g/kg) (group II), L-NAME (2 mg/kg) (group III) or arginine (0.8 g/kg) plus L-NAME (2 mg/kg) (group IV). Na(+),K(+)-ATPase activity was significantly reduced in the arginine-treated rats, but was not affected by other treatments. In contrast, Mg(2+)-ATPase activity was not altered by any treatment. Furthermore, chemiluminescence was significantly increased and TRAP was significantly decreased in arginine-treated rats, whereas the simultaneous injection of L-NAME prevented these effects. These results demonstrate that in vivo arginine administration reduces Na(+),K(+)-ATPase activity possibly through free radical generation induced by NO formation.
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Affiliation(s)
- A T Wyse
- Departamento de Bioquímica, ICBS, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
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