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Azizi F, Ghasemi R, EbrahimiBarough S, Ardalan M, Hadjighassem M. Effect of multifactorial therapeutic approach on axonal regeneration and cell viability in an in-vitro model of spinal-derived neural injury. Cell Tissue Bank 2023; 24:471-484. [PMID: 36396867 DOI: 10.1007/s10561-022-10047-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 10/23/2022] [Indexed: 11/18/2022]
Abstract
The highly debilitated nature of spinal cord injuries (SCI) creates an inhibitory repair environment that limits the recovery rate and therefore single interventional treatment has been resulted in incomplete recovery. A multifactorial approach that combines several therapeutic approaches may address diverse aspects of SCI pathology and enhance the recovery rate over single therapy. Accordingly, in this study, we aimed to investigate the effect of combined olfactory ensheathing cells (OECs) (to transport trophic factor, mediate immunomodulation, provide a suitable environment for cell survival), G-CSF (to establish a favorable environment for cell survival) and lipopolysaccharide (LPS) (to boost the protective activity of OEC) therapy on the cell viability after a scratch injury caused by a cataract knife on cells in an in-vitro model of spinal-derived neural injury. In this study, we used mixed neuronal-glial cultures, which are widely used for an in vitro study of neuronal damage. Scratch insult was made on cells using a cataract knife. The cells were divided into 8 groups (two control groups with and without olfactory ensheathing cells (OECs) treatment, injury group, three injury groups with single therapy by using super low dose of LPS (SLD-LPS) (100 pg/ml), OEC group, and G-CSF (100 ng/ml) group, and two injury groups with combined therapy (OEC with SLD-LPS and with all three treatments)). We found a significant decrease in the survival rate of injured cells (p < 0.001) 24 h after scratching insult. Our results indicated morphological alterations in cells in the acute phase (1, 2 and 6 h) after injury, with significant increased gap size at 6 h after induction of injury. Our combined therapy, significantly prevented cell death and decreased the size of the gap over time. We found that combined therapy promoted cell survival following spinal injury by providing a neuroprotective environment for cells. Therefore, our findings provide new insight into the combined therapy, which can be considered for promising preclinical therapeutic strategy for SCI toward clinical trials.
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Affiliation(s)
- Fateme Azizi
- Department of neuroscience and addiction studies, School of advanced technologies in medicine, Tehran University of medical sciences, Tehran, Iran
| | - Rasoul Ghasemi
- Department of Physiology and Neurophysiology research center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Somayeh EbrahimiBarough
- Department of Tissue Engineering and Applied cell Sciences, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Ardalan
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Translational Neuropsychiatry Unit, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Mahmoudreza Hadjighassem
- Brain and spinal cord research center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran.
- Department of neuroscience and addiction studies, School of advanced technologies in medicine, Tehran University of medical sciences, Tehran, Iran.
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2
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Karandikar P, Gerstl JVE, Kappel AD, Won SY, Dubinski D, Garcia-Segura ME, Gessler FA, See AP, Peruzzotti-Jametti L, Bernstock JD. SUMOtherapeutics for Ischemic Stroke. Pharmaceuticals (Basel) 2023; 16:ph16050673. [PMID: 37242456 DOI: 10.3390/ph16050673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/25/2023] [Accepted: 04/27/2023] [Indexed: 05/28/2023] Open
Abstract
The small, ubiquitin-like modifier (SUMO) is a post-translational modifier with a profound influence on several key biological processes, including the mammalian stress response. Of particular interest are its neuroprotective effects, first recognized in the 13-lined ground squirrel (Ictidomys tridecemlineatus), in the context of hibernation torpor. Although the full scope of the SUMO pathway is yet to be elucidated, observations of its importance in managing neuronal responses to ischemia, maintaining ion gradients, and the preconditioning of neural stem cells make it a promising therapeutic target for acute cerebral ischemia. Recent advances in high-throughput screening have enabled the identification of small molecules that can upregulate SUMOylation, some of which have been validated in pertinent preclinical models of cerebral ischemia. Accordingly, the present review aims to summarize current knowledge and highlight the translational potential of the SUMOylation pathway in brain ischemia.
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Affiliation(s)
- Paramesh Karandikar
- T. H. Chan School of Medicine, University of Massachusetts, Worcester, MA 01655, USA
| | - Jakob V E Gerstl
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02215, USA
| | - Ari D Kappel
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02215, USA
- Department of Neurosurgery, Boston Children's Hospital, Boston, MA 02215, USA
| | - Sae-Yeon Won
- Department of Neurosurgery, University Medicine Rostock, 18057 Rostock, Germany
| | - Daniel Dubinski
- Department of Neurosurgery, University Medicine Rostock, 18057 Rostock, Germany
| | - Monica Emili Garcia-Segura
- Department of Clinical Neurosciences, University of Cambridge, Cambridge CB2 0QQ, UK
- NIHR Biomedical Research Centre, University of Cambridge, Cambridge CB2 0QQ, UK
| | - Florian A Gessler
- Department of Neurosurgery, University Medicine Rostock, 18057 Rostock, Germany
| | - Alfred Pokmeng See
- Department of Neurosurgery, Boston Children's Hospital, Boston, MA 02215, USA
| | - Luca Peruzzotti-Jametti
- Department of Clinical Neurosciences, University of Cambridge, Cambridge CB2 0QQ, UK
- NIHR Biomedical Research Centre, University of Cambridge, Cambridge CB2 0QQ, UK
| | - Joshua D Bernstock
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02215, USA
- Department of Neurosurgery, University Medicine Rostock, 18057 Rostock, Germany
- Koch Institute for Integrated Cancer Research, MIT, Cambridge, MA 02142, USA
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3
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Bubley A, Erofeev A, Gorelkin P, Beloglazkina E, Majouga A, Krasnovskaya O. Tacrine-Based Hybrids: Past, Present, and Future. Int J Mol Sci 2023; 24:ijms24021717. [PMID: 36675233 PMCID: PMC9863713 DOI: 10.3390/ijms24021717] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 01/10/2023] [Accepted: 01/11/2023] [Indexed: 01/18/2023] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder which is characterized by β-amyloid (Aβ) aggregation, τ-hyperphosphorylation, and loss of cholinergic neurons. The other important hallmarks of AD are oxidative stress, metal dyshomeostasis, inflammation, and cell cycle dysregulation. Multiple therapeutic targets may be proposed for the development of anti-AD drugs, and the "one drug-multiple targets" strategy is of current interest. Tacrine (THA) was the first clinically approved cholinesterase (ChE) inhibitor, which was withdrawn due to high hepatotoxicity. However, its high potency in ChE inhibition, low molecular weight, and simple structure make THA a promising scaffold for developing multi-target agents. In this review, we summarized THA-based hybrids published from 2006 to 2022, thus providing an overview of strategies that have been used in drug design and approaches that have resulted in significant cognitive improvements and reduced hepatotoxicity.
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Affiliation(s)
- Anna Bubley
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia
| | - Alexaner Erofeev
- Department of Materials Science of Semiconductors and Dielectrics, National University of Science and Technology (MISIS), Leninskiy Prospect 4, Moscow 119049, Russia
| | - Peter Gorelkin
- Department of Materials Science of Semiconductors and Dielectrics, National University of Science and Technology (MISIS), Leninskiy Prospect 4, Moscow 119049, Russia
| | - Elena Beloglazkina
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia
| | - Alexander Majouga
- Department of Materials Science of Semiconductors and Dielectrics, National University of Science and Technology (MISIS), Leninskiy Prospect 4, Moscow 119049, Russia
| | - Olga Krasnovskaya
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia
- Department of Materials Science of Semiconductors and Dielectrics, National University of Science and Technology (MISIS), Leninskiy Prospect 4, Moscow 119049, Russia
- Correspondence:
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Ramli FF, Cowen PJ, Godlewska BR. The Potential Use of Ebselen in Treatment-Resistant Depression. Pharmaceuticals (Basel) 2022; 15:485. [PMID: 35455482 PMCID: PMC9030939 DOI: 10.3390/ph15040485] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/11/2022] [Accepted: 04/12/2022] [Indexed: 02/01/2023] Open
Abstract
Ebselen is an organoselenium compound developed as an antioxidant and subsequently shown to be a glutathione peroxidase (GPx) mimetic. Ebselen shows some efficacy in post-stroke neuroprotection and is currently in trial for the treatment and prevention of hearing loss, Meniere's Disease and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). In vitro screening studies show that ebselen is also an effective inhibitor of the enzyme inositol monophosphatase (IMPase), which is a key target of the mood-stabilising drug lithium. Further, in animal experimental studies, ebselen produces effects on the serotonin system very similar to those of lithium and also decreases behavioural impulsivity. The antidepressant effects of lithium in treatment-resistant depression (TRD) have been attributed to its ability to facilitate presynaptic serotonin activity; this suggests that ebselen might also have a therapeutic role in this condition. Human studies utilising magnetic resonance spectroscopy support the notion that ebselen, at therapeutic doses, inhibits IMPase in the human brain. Moreover, neuropsychological studies support an antidepressant profile for ebselen based on positive effects on emotional processing and reward seeking. Ebselen also lowers a human laboratory measure of impulsivity, a property that has been associated with lithium's anti-suicidal effects in patients with mood disorders. Current clinical studies are directed towards assessment of the neuropsychological effects of ebselen in TRD patients. It will also be important to ascertain whether ebselen is able to lower impulsivity and suicidal behaviour in clinical populations. The objective of this review is to summarise the developmental history, pre-clinical and clinical psychopharmacological properties of ebselen in psychiatric disorders and its potential application as a treatment for TRD.
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Affiliation(s)
- Fitri Fareez Ramli
- Clinical Psychopharmacology Research Group, Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford OX3 7JX, UK; (F.F.R.); (P.J.C.)
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
| | - Philip J. Cowen
- Clinical Psychopharmacology Research Group, Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford OX3 7JX, UK; (F.F.R.); (P.J.C.)
| | - Beata R. Godlewska
- Clinical Psychopharmacology Research Group, Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford OX3 7JX, UK; (F.F.R.); (P.J.C.)
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Fang J, Sheng R, Qin ZH. NADPH Oxidases in the Central Nervous System: Regional and Cellular Localization and the Possible Link to Brain Diseases. Antioxid Redox Signal 2021; 35:951-973. [PMID: 34293949 DOI: 10.1089/ars.2021.0040] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Significance: The significant role of reduced nicotinamide adenine dinucleotide phosphate (NADPH) oxidase (Nox) in signal transduction is mediated by the production of reactive oxygen species (ROS), especially in the central nervous system (CNS). The pathogenesis of some neurologic and psychiatric diseases is regulated by ROS, acting as a second messenger or pathogen. Recent Advances: In the CNS, the involvement of Nox-derived ROS has been implicated in the regulation of multiple signals, including cell survival/apoptosis, neuroinflammation, migration, differentiation, proliferation, and synaptic plasticity, as well as the integrity of the blood/brain barrier. In these processes, the intracellular signals mediated by the members of the Nox family vary among different tissues. The present review illuminates the regions and cellular, subcellular localization of Nox isoforms in the brain, the signal transduction, and the role of NOX enzymes in pathophysiology, respectively. Critical Issues: Different signal transduction cascades are coupled to ROS derived from various Nox homologues with varying degrees. Therefore, a critical issue worth noting is the varied role of the homologues of NOX enzymes in different signaling pathways and also they mediate different phenotypes in the diverse pathophysiological condition. This substantiates the effectiveness of selective Nox inhibitors in the CNS. Future Directions: Further investigation to elucidate the role of various homologues of NOX enzymes in acute and chronic brain diseases and signaling mechanisms, and the development of more specific NOX inhibitors for the treatment of CNS disease are urgently needed. Antioxid. Redox Signal. 35, 951-973.
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Affiliation(s)
- Jie Fang
- Department of Pharmacology and Laboratory of Aging and Nervous Diseases, Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, College of Pharmaceutical Science, Soochow University, Suzhou, China
| | - Rui Sheng
- Department of Pharmacology and Laboratory of Aging and Nervous Diseases, Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, College of Pharmaceutical Science, Soochow University, Suzhou, China
| | - Zheng-Hong Qin
- Department of Pharmacology and Laboratory of Aging and Nervous Diseases, Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, College of Pharmaceutical Science, Soochow University, Suzhou, China
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6
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Galant LS, Rafique J, Braga AL, Braga FC, Saba S, Radi R, da Rocha JBT, Santi C, Monsalve M, Farina M, de Bem AF. The Thiol-Modifier Effects of Organoselenium Compounds and Their Cytoprotective Actions in Neuronal Cells. Neurochem Res 2020; 46:120-130. [PMID: 32285377 DOI: 10.1007/s11064-020-03026-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 03/31/2020] [Accepted: 04/04/2020] [Indexed: 01/10/2023]
Abstract
Most pharmacological studies concerning the beneficial effects of organoselenium compounds have focused on their ability to mimic glutathione peroxidase (GPx). However, mechanisms other than GPx-like activity might be involved on their biological effects. This study was aimed to investigate and compare the protective effects of two well known [(PhSe)2 and PhSeZnCl] and two newly developed (MRK Picolyl and MRK Ester) organoselenium compounds against oxidative challenge in cultured neuronal HT22 cells. The thiol peroxidase and oxidase activities were performed using the glutathione reductase (GR)-coupled assay. In order to evaluate protective effects of the organoselenium compounds against oxidative challenge in neuronal HT22 cells, experiments based on glutamate-induced oxytosis and SIN-1-mediated peroxynitrite generation were performed. The thiol peroxidase activities of the studied organoselenium compounds were smaller than bovine erythrocytes GPx enzyme. Besides, (PhSe)2 and PhSeZnCl showed higher thiol peroxidase and lower thiol oxidase activities compared to the new compounds. MRK Picolyl and MRK Ester, which showed lower thiol peroxidase activity, showed higher thiol oxidase activity. Both pre- or co-treatment with (PhSe)2, PhSeZnCl, MRK Picolyl and MRK Ester protected HT22 cells against glutamate-induced cytotoxicity. (PhSe)2 and MRK Picolyl significantly prevented peroxinitrite-induced dihydrorhodamine oxidation, but this effect was observed only when HT22 were pre-treated with these compounds. The treatment with (PhSe)2 increased the protein expression of antioxidant defences (Prx3, CAT and GCLC) in HT22 cells. Taking together, our results suggest that the biological effects elicited by these compounds are not directly related to their GPx-mimetic and thiol oxidase activities, but might be linked to the up-regulation of endogenous antioxidant defences trough their thiol-modifier effects.
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Affiliation(s)
- Letícia Selinger Galant
- Biochemistry PhD Program, Department of Biochemistry, Federal University of Santa Catarina, Florianopolis, SC, Brazil
| | - Jamal Rafique
- Department of Chemistry, Center for Biological Sciences, Federal University of Santa Catarina, Florianópolis, Brazil.,Instituto de Química, Universidade Federal Do Mato Grosso Do Sul, Campo Grande, MS, 79074-460, Brazil
| | - Antônio Luiz Braga
- Department of Chemistry, Center for Biological Sciences, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Felipe Camargo Braga
- Instituto de Química, Universidade Federal Do Mato Grosso Do Sul, Campo Grande, MS, 79074-460, Brazil
| | - Sumbal Saba
- Centro de Ciências Naturais E Humanas-CCNH, Universidade Federal Do ABC, Santo André, SP, 09210-580, Brazil
| | - Rafael Radi
- Center for Free Radical and Biomedical Research (CEINBIO), Facultad de Medicina, Universidad de La República, Montevideo, Uruguay
| | | | - Claudio Santi
- Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy
| | - Maria Monsalve
- Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), Arturo Duperier 4, 28029, Madrid, Spain
| | - Marcelo Farina
- Biochemistry PhD Program, Department of Biochemistry, Federal University of Santa Catarina, Florianopolis, SC, Brazil.
| | - Andreza Fabro de Bem
- Biochemistry PhD Program, Department of Biochemistry, Federal University of Santa Catarina, Florianopolis, SC, Brazil. .,Departament of Physiological Science, Institute for Biological Sciences, University of Brasília, Brasília, Brazil.
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7
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Reductive Reprogramming: A Not-So-Radical Hypothesis of Neurodegeneration Linking Redox Perturbations to Neuroinflammation and Excitotoxicity. Cell Mol Neurobiol 2019; 39:577-590. [DOI: 10.1007/s10571-019-00672-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 03/18/2019] [Indexed: 12/12/2022]
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8
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Servaes S, Kara F, Glorie D, Stroobants S, Van Der Linden A, Staelens S. In Vivo Preclinical Molecular Imaging of Repeated Exposure to an N-methyl-d-aspartate Antagonist and a Glutaminase Inhibitor as Potential Glutamatergic Modulators. J Pharmacol Exp Ther 2018; 368:382-390. [PMID: 30552293 DOI: 10.1124/jpet.118.252635] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 11/19/2018] [Indexed: 12/30/2022] Open
Abstract
Glutamate is the principal excitatory neurotransmitter in the brain and is at the base of a wide variety of neuropathologies, including epilepsy, autism, Fragile X, and obsessive compulsive disorder. Glutamate has also become the target for novel drugs in treatment and in fundamental research settings. However, much remains unknown on the working mechanisms of these drugs and the effects of chronic administration on the glutamatergic system. This study investigated the chronic effects of two glutamate-modulating drugs with imaging techniques to further clarify their working mechanisms for future research opportunities. Animals were exposed to saline (1 ml/kg), (5S,10R)-(+)-5-Methyl-10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5,10-imine (MK-801) (0.3 mg/kg), or ebselen (10 mg/kg) for 7 consecutive days. At the sixth injection, animals underwent a positron emission tomography (PET)/computed tomography (CT) with (3-(6-methyl-pyridin-2-ylethynyl)-cyclohex-2-enone-O-11C-methyl-oxime) (ABP-688) to visualize the metabotropic G protein-coupled glutamate receptor 5 (mGluR5). After the seventh injection, animals underwent a magnetic resonance spectroscopy (MRS) scan to visualize glutamate and glutamine content. Afterward, results were verified by mGluR5 immunohistochemistry (IHC). PET/CT analysis revealed that animals receiving chronic MK-801 or ebselen had a significant (P < 0.05) higher binding potential (2.90 ± 0.47 and 2.87 ± 0.46, respectively) when compared with saline (1.97 ± 0.39) in the caudate putamen. This was confirmed by mGluR5 IHC, with 60.83% ± 6.30% of the area being highlighted for ebselen and 57.14% ± 9.23% for MK-801 versus 50.21% ± 5.71% for the saline group. MRS displayed significant changes on the glutamine level when comparing chronic ebselen (2.20 ± 0.40 µmol/g) to control (2.72 ± 0.34 µmol/g). Therefore, although no direct effects on glutamate were visualized, the changes in glutamine suggest changes in the total glutamate-glutamine pool. This highlights the potential of both drugs to modulate glutamatergic pathologies.
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Affiliation(s)
- Stijn Servaes
- Molecular Imaging Center Antwerp (Sti.S., D.G., Si.S., Ste.S.) and Bio-Imaging Laboratory (F.K., A.V.D.L.), University of Antwerp, Wilrijk, Antwerp, Belgium; and Department of Nuclear Medicine, University Hospital Antwerp, Edegem, Antwerp, Belgium (Si.S.)
| | - Firat Kara
- Molecular Imaging Center Antwerp (Sti.S., D.G., Si.S., Ste.S.) and Bio-Imaging Laboratory (F.K., A.V.D.L.), University of Antwerp, Wilrijk, Antwerp, Belgium; and Department of Nuclear Medicine, University Hospital Antwerp, Edegem, Antwerp, Belgium (Si.S.)
| | - Dorien Glorie
- Molecular Imaging Center Antwerp (Sti.S., D.G., Si.S., Ste.S.) and Bio-Imaging Laboratory (F.K., A.V.D.L.), University of Antwerp, Wilrijk, Antwerp, Belgium; and Department of Nuclear Medicine, University Hospital Antwerp, Edegem, Antwerp, Belgium (Si.S.)
| | - Sigrid Stroobants
- Molecular Imaging Center Antwerp (Sti.S., D.G., Si.S., Ste.S.) and Bio-Imaging Laboratory (F.K., A.V.D.L.), University of Antwerp, Wilrijk, Antwerp, Belgium; and Department of Nuclear Medicine, University Hospital Antwerp, Edegem, Antwerp, Belgium (Si.S.)
| | - Annemie Van Der Linden
- Molecular Imaging Center Antwerp (Sti.S., D.G., Si.S., Ste.S.) and Bio-Imaging Laboratory (F.K., A.V.D.L.), University of Antwerp, Wilrijk, Antwerp, Belgium; and Department of Nuclear Medicine, University Hospital Antwerp, Edegem, Antwerp, Belgium (Si.S.)
| | - Steven Staelens
- Molecular Imaging Center Antwerp (Sti.S., D.G., Si.S., Ste.S.) and Bio-Imaging Laboratory (F.K., A.V.D.L.), University of Antwerp, Wilrijk, Antwerp, Belgium; and Department of Nuclear Medicine, University Hospital Antwerp, Edegem, Antwerp, Belgium (Si.S.)
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9
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Chau EJ, Mostaid MS, Cropley V, McGorry P, Pantelis C, Bousman CA, Everall IP. Downregulation of plasma SELENBP1 protein in patients with recent-onset schizophrenia. Prog Neuropsychopharmacol Biol Psychiatry 2018; 85:1-6. [PMID: 29577944 DOI: 10.1016/j.pnpbp.2018.03.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 02/22/2018] [Accepted: 03/09/2018] [Indexed: 12/19/2022]
Abstract
Upregulation of selenium binding protein 1 (SELENBP1) mRNA expression has been reported in schizophrenia, primarily in the dorsolateral prefrontal cortex. However, peripheral blood studies are limited and results are inconsistent. In this study, we examined SELENBP1 mRNA expression in whole blood and protein expression in plasma from patients with recent-onset schizophrenia (n = 30), treatment-resistant schizophrenia (n = 71) and healthy controls (n = 57). We also examined the effects of SELENBP1 genetic variation on gene and protein expression. We found lower SELENBP1 plasma protein levels in patients with recent-onset schizophrenia (p = 0.042) but not in treatment-resistant schizophrenia (p = 0.81). Measurement of peripheral mRNA levels showed no difference between treatment-resistant schizophrenia and healthy controls (p = 0.234) but clozapine plasma levels (p = 0.036) and duration of illness (p = 0.028) were positively correlated with mRNA levels. Genetic variation was not associated with mRNA or protein expression. Our data represent the first peripheral proteomic study of SELENBP1 in schizophrenia and suggest that plasma SELENBP1 protein is downregulated in patients with recent-onset schizophrenia.
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Affiliation(s)
- Edith J Chau
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne & Melbourne Health, Carlton South, VIC, Australia
| | - Md Shaki Mostaid
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne & Melbourne Health, Carlton South, VIC, Australia; The Cooperative Research Centre (CRC) for Mental Health, Victoria, Australia
| | - Vanessa Cropley
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne & Melbourne Health, Carlton South, VIC, Australia
| | - Patrick McGorry
- Orygen, The National Centre of Excellence in Youth Mental Health, Parkville, VIC, Australia,; Centre for Youth Mental Health, The University of Melbourne, Parkville, VIC, Australia
| | - Christos Pantelis
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne & Melbourne Health, Carlton South, VIC, Australia; The Cooperative Research Centre (CRC) for Mental Health, Victoria, Australia; Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC, Australia; Centre for Neural Engineering, The University of Melbourne, Carlton, VIC, Australia; NorthWestern Mental Health, Melbourne, Victoria, Australia
| | - Chad A Bousman
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne & Melbourne Health, Carlton South, VIC, Australia; The Cooperative Research Centre (CRC) for Mental Health, Victoria, Australia; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada; Departments of Medical Genetics, Psychiatry, and Physiology and Pharmacology, University of Calgary, Calgary, AB, Canada
| | - Ian P Everall
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne & Melbourne Health, Carlton South, VIC, Australia; The Cooperative Research Centre (CRC) for Mental Health, Victoria, Australia; Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC, Australia; Centre for Neural Engineering, The University of Melbourne, Carlton, VIC, Australia; NorthWestern Mental Health, Melbourne, Victoria, Australia; Institute of Psychiatry, Psychology, and Neuroscience, King's College London, UK.
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10
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The cysteine-reactive small molecule ebselen facilitates effective SOD1 maturation. Nat Commun 2018; 9:1693. [PMID: 29703933 PMCID: PMC5923229 DOI: 10.1038/s41467-018-04114-x] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 04/04/2018] [Indexed: 11/20/2022] Open
Abstract
Superoxide dismutase-1 (SOD1) mutants, including those with unaltered enzymatic activity, are known to cause amyotrophic lateral sclerosis (ALS). Several destabilizing factors contribute to pathogenicity including a reduced ability to complete the normal maturation process which comprises folding, metal cofactor acquisition, intra-subunit disulphide bond formation and dimerization. Immature SOD1 forms toxic oligomers and characteristic large insoluble aggregates within motor system cells. Here we report that the cysteine-reactive molecule ebselen efficiently confers the SOD1 intra-subunit disulphide and directs correct SOD1 folding, depopulating the globally unfolded precursor associated with aggregation and toxicity. Assisted formation of the unusual SOD1 cytosolic disulphide bond could have potential therapeutic applications. In less reducing environments, ebselen forms a selenylsulphide with Cys111 and restores the monomer–dimer equilibrium of A4V SOD1 to wild-type. Ebselen is therefore a potent bifunctional pharmacological chaperone for SOD1 that combines properties of the SOD1 chaperone hCCS and the recently licenced antioxidant drug, edaravone. Mutations in superoxide dismutase-1 (SOD1) cause amyotrophic lateral sclerosis (ALS). Here the authors present the SOD1 crystal structure bound to the small cysteine-reactive molecule ebselen and show that ebselen is a chaperone for SOD1.
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Zborowski VA, Sari MH, Heck SO, Stangherlin EC, Neto JS, Nogueira CW, Zeni G. p-Chloro-diphenyl diselenide reverses memory impairment-related to stress caused by corticosterone and modulates hippocampal [3H]glutamate uptake in mice. Physiol Behav 2016; 164:25-33. [DOI: 10.1016/j.physbeh.2016.05.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 04/08/2016] [Accepted: 05/16/2016] [Indexed: 01/13/2023]
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12
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Masaki C, Sharpley AL, Godlewska BR, Berrington A, Hashimoto T, Singh N, Vasudevan SR, Emir UE, Churchill GC, Cowen PJ. Effects of the potential lithium-mimetic, ebselen, on brain neurochemistry: a magnetic resonance spectroscopy study at 7 tesla. Psychopharmacology (Berl) 2016; 233:1097-104. [PMID: 26758281 PMCID: PMC4759215 DOI: 10.1007/s00213-015-4189-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2015] [Accepted: 12/13/2015] [Indexed: 11/27/2022]
Abstract
RATIONALE Lithium is an effective treatment for bipolar disorder, but safety issues complicate its clinical use. The antioxidant drug, ebselen, may be a possible lithium-mimetic based on its ability to inhibit inositol monophosphatase (IMPase), an action which it shares with lithium. OBJECTIVES Our primary aim was to determine whether ebselen lowered levels of inositol in the human brain. We also assessed the effect of ebselen on other brain neurometabolites, including glutathione, glutamate, glutamine, and glutamate + glutamine (Glx) METHODS Twenty healthy volunteers were tested on two occasions receiving either ebselen (3600 mg over 24 h) or identical placebo in a double-blind, random-order, crossover design. Two hours after the final dose of ebselen/placebo, participants underwent proton magnetic resonance spectroscopy ((1)H MRS) at 7 tesla (T) with voxels placed in the anterior cingulate and occipital cortex. Neurometabolite levels were calculated using an unsuppressed water signal as a reference and corrected for individual cerebrospinal fluid content in the voxel. RESULTS Ebselen produced no effect on neurometabolite levels in the occipital cortex. In the anterior cingulate cortex, ebselen lowered concentrations of inositol (p = 0.028, Cohen's d = 0.60) as well as those of glutathione (p = 0.033, d = 0.58), glutamine (p = 0.024, d = 0.62), glutamate (p = 0.01, d = 0.73), and Glx (p = 0.001, d = 1.0). CONCLUSIONS The study suggests that ebselen produces a functional inhibition of IMPase in the human brain. The effect of ebselen to lower glutamate is consistent with its reported ability to inhibit the enzyme, glutaminase. Ebselen may have potential as a repurposed treatment for bipolar disorder.
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Affiliation(s)
- Charles Masaki
- Department of Psychiatry, Warneford Hospital, University of Oxford, Oxford, OX3 7JX, UK
| | - Ann L Sharpley
- Department of Psychiatry, Warneford Hospital, University of Oxford, Oxford, OX3 7JX, UK
| | - Beata R Godlewska
- Department of Psychiatry, Warneford Hospital, University of Oxford, Oxford, OX3 7JX, UK
| | - Adam Berrington
- The Oxford Centre for Functional MRI of the Brain, Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, University of Oxford, Oxford, OX3 9DU, UK
| | - Tasuku Hashimoto
- Department of Psychiatry, Warneford Hospital, University of Oxford, Oxford, OX3 7JX, UK
| | - Nisha Singh
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
- Current Address: Centre for Neuroimaging Studies, PO 089, De Crespigny Park, London, SE5 8AF, UK
| | - Sridhar R Vasudevan
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
| | - Uzay E Emir
- The Oxford Centre for Functional MRI of the Brain, Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, University of Oxford, Oxford, OX3 9DU, UK
| | - Grant C Churchill
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
| | - Philip J Cowen
- Department of Psychiatry, Warneford Hospital, University of Oxford, Oxford, OX3 7JX, UK.
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SELENBP1 expression in the prefrontal cortex of subjects with schizophrenia. Transl Psychiatry 2015; 5:e615. [PMID: 26241353 PMCID: PMC4564563 DOI: 10.1038/tp.2015.108] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 06/10/2015] [Accepted: 06/14/2015] [Indexed: 12/30/2022] Open
Abstract
Selenium binding protein 1 (SELENBP1) messenger RNA (mRNA) has previously been shown to be upregulated in the brain and blood from subjects with schizophrenia. We aimed to validate these findings in a new cohort using real-time PCR in Brodmann's Area (BA) 9, and to determine the disease specificity of increased SELENBP1 expression by measuring SELENBP1 mRNA in subjects with major depressive disorder and bipolar disorder. We then extended the study to include other cortical regions such as BA8 and BA44. SELENBP1 mRNA was higher in BA9 (P = 0.001), BA8 (P = 0.003) and BA44 (P = 0.0007) from subjects with schizophrenia. Conversely, in affective disorders, there was no significant difference in SELENBP1 mRNA in BA9 (P = 0.67), suggesting that the upregulation may be diagnosis specific. Measurement of SELENBP1 protein levels showed that changes in mRNA did not translate to changes in protein. In addition, chronic treatment of rats with antipsychotics did not significantly affect the expression of Selenbp1 in the cortex (P = 0.24). Our data show that elevated SELENBP1 transcript expression is widespread throughout the prefrontal cortex in schizophrenia, and confirm that this change is a consistent feature of schizophrenia and not a simple drug effect.
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Jia M, Njapo SAN, Rastogi V, Hedna VS. Taming glutamate excitotoxicity: strategic pathway modulation for neuroprotection. CNS Drugs 2015; 29:153-62. [PMID: 25633850 DOI: 10.1007/s40263-015-0225-3] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Much work has been carried out in recent years showing that elevated glutamate levels in the extracellular environment of the central nervous system play a pivotal role in neurodegeneration in acute CNS injuries. With the elucidation of the mechanism governing glutamate excitotoxicity, researchers are devising therapeutic strategies to target different parts of the pathway which begins with glutamate accumulation and ultimately results in neuronal cell death. In this article, we review some of the major classes of agents that are currently being investigated and highlight some of the key studies for each. Glutamate scavenging is a relatively new approach that directly decreases glutamate levels in the brain, thus preventing excitotoxicity. Nitric oxide inhibitors and free radical scavengers are more well-studied strategies that continue to yield promising results.
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Affiliation(s)
- Ming Jia
- University of Florida College of Medicine, Gainesville, FL, USA
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15
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Azad GK, Tomar RS. Ebselen, a promising antioxidant drug: mechanisms of action and targets of biological pathways. Mol Biol Rep 2014; 41:4865-79. [DOI: 10.1007/s11033-014-3417-x] [Citation(s) in RCA: 196] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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16
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Mao F, Chen J, Zhou Q, Luo Z, Huang L, Li X. Novel tacrine–ebselen hybrids with improved cholinesterase inhibitory, hydrogen peroxide and peroxynitrite scavenging activity. Bioorg Med Chem Lett 2013; 23:6737-42. [DOI: 10.1016/j.bmcl.2013.10.034] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2013] [Revised: 10/05/2013] [Accepted: 10/18/2013] [Indexed: 01/14/2023]
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17
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Adebayo OL, Adenuga GA, Sandhir R. Postnatal protein malnutrition induces neurochemical alterations leading to behavioral deficits in rats: Prevention by selenium or zinc supplementation. Nutr Neurosci 2013; 17:268-78. [DOI: 10.1179/1476830513y.0000000090] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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18
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Unsal C, Oran M, Albayrak Y, Aktas C, Erboga M, Topcu B, Uygur R, Tulubas F, Yanartas O, Ates O, Ozen OA. Neuroprotective effect of ebselen against intracerebroventricular streptozotocin-induced neuronal apoptosis and oxidative stress in rats. Toxicol Ind Health 2013; 32:730-40. [PMID: 24231787 DOI: 10.1177/0748233713509429] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The goal of this study was to examine the neuroprotective effect of ebselen against intracerebroventricular streptozotocin (ICV-STZ)-induced oxidative stress and neuronal apoptosis in rat brain. A total of 30 adult male Sprague-Dawley rats were randomly divided into 3 groups of 10 animals each: control, ICV-STZ, and ICV-STZ treated with ebselen. The ICV-STZ group rats were injected bilaterally with ICV-STZ (3 mg/kg) on days 1 and 3, and ebselen (10 mg/kg/day) was administered for 14 days starting from 1st day of ICV-STZ injection to day 14. Rats were killed at the end of the study and brain tissues were removed for biochemical and histopathological investigation. Our results demonstrated, for the first time, the neuroprotective effect of ebselen on Alzheimer's disease (AD) model in rats. Our present study, in ICV-STZ group, showed significant increase in tissue malondialdehyde levels and significant decrease in enzymatic antioxidants superoxide dismutase and glutathione peroxidase in the frontal cortex tissue. The histopathological studies in the brain of rats also supported that ebselen markedly reduced the ICV-STZ-induced histopathological changes and well preserved the normal histological architecture of the frontal cortex tissue. The number of apoptotic neurons was increased in frontal cortex tissue after ICV-STZ administration. Treatment of ebselen markedly reduced the number of degenerating apoptotic neurons. The study demonstrates the effectiveness of ebselen, as a powerful antioxidant, in preventing the oxidative damage and morphological changes caused by ICV-STZ in rats. Thus, ebselen may have a therapeutic value for the treatment of AD.
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Affiliation(s)
- Cuneyt Unsal
- Department of Psychiatry, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| | - Mustafa Oran
- Department of Internal Medicine, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| | - Yakup Albayrak
- Department of Psychiatry, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| | - Cevat Aktas
- Department of Histology and Embryology, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| | - Mustafa Erboga
- Department of Histology and Embryology, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| | - Birol Topcu
- Department of Biostatistics, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| | - Ramazan Uygur
- Department of Anatomy, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| | - Feti Tulubas
- Department of Biochemistry, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| | - Omer Yanartas
- Department of Psychiatry, The Ministry of Health of Turkey, Marmara University Hospital Pendik Training and Research Hospital, Istanbul, Turkey
| | - Ozkan Ates
- Department of Neurosurgery, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| | - Oguz Aslan Ozen
- Department of Anatomy, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
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Mendelev N, Mehta SL, Idris H, Kumari S, Li PA. Selenite stimulates mitochondrial biogenesis signaling and enhances mitochondrial functional performance in murine hippocampal neuronal cells. PLoS One 2012; 7:e47910. [PMID: 23110128 PMCID: PMC3478265 DOI: 10.1371/journal.pone.0047910] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 09/18/2012] [Indexed: 11/23/2022] Open
Abstract
Supplementation of selenium has been shown to protect cells against free radical mediated cell damage. The objectives of this study are to examine whether supplementation of selenium stimulates mitochondrial biogenesis signaling pathways and whether selenium enhances mitochondrial functional performance. Murine hippocampal neuronal HT22 cells were treated with sodium selenite for 24 hours. Mitochondrial biogenesis markers, mitochondrial respiratory rate and activities of mitochondrial electron transport chain complexes were measured and compared to non-treated cells. The results revealed that treatment of selenium to the HT22 cells elevated the levels of nuclear mitochondrial biogenesis regulators PGC-1α and NRF1, as well as mitochondrial proteins cytochrome c and cytochrome c oxidase IV (COX IV). These effects are associated with phosphorylation of Akt and cAMP response element-binding (CREB). Supplementation of selenium significantly increased mitochondrial respiration and improved the activities of mitochondrial respiratory complexes. We conclude that selenium activates mitochondrial biogenesis signaling pathway and improves mitochondrial function. These effects may be associated with modulation of AKT-CREB pathway.
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Affiliation(s)
- Natalia Mendelev
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, North Carolina, United States of America
| | - Suresh L. Mehta
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, North Carolina, United States of America
| | - Haza Idris
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, North Carolina, United States of America
| | - Santosh Kumari
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, North Carolina, United States of America
| | - P. Andy Li
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, North Carolina, United States of America
- Department of Pathology, Ningxia Medical University, Yinchuan, Ningxia, People's Republic of China
- * E-mail:
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20
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Filho CB, Del Fabbro L, Boeira SP, Furian AF, Savegnago L, Soares LC, Braga AL, Jesse CR. Hepatoprotective effect ofbis(4-methylbenzoyl) diselenide against CCl4-induced oxidative damage in mice. Cell Biochem Funct 2012; 31:152-8. [DOI: 10.1002/cbf.2869] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Revised: 08/07/2012] [Accepted: 08/08/2012] [Indexed: 12/12/2022]
Affiliation(s)
- Carlos Borges Filho
- Laboratório de Avaliações Farmacológicas e Toxicológicas Aplicadas às Moléculas Bioativas, LaftamBio Pampa; Universidade Federal do Pampa; CEP 97650-000; Itaqui; RS; Brazil
| | - Lucian Del Fabbro
- Laboratório de Avaliações Farmacológicas e Toxicológicas Aplicadas às Moléculas Bioativas, LaftamBio Pampa; Universidade Federal do Pampa; CEP 97650-000; Itaqui; RS; Brazil
| | - Silvana P. Boeira
- Laboratório de Avaliações Farmacológicas e Toxicológicas Aplicadas às Moléculas Bioativas, LaftamBio Pampa; Universidade Federal do Pampa; CEP 97650-000; Itaqui; RS; Brazil
| | - Ana Flávia Furian
- Laboratório de Avaliações Farmacológicas e Toxicológicas Aplicadas às Moléculas Bioativas, LaftamBio Pampa; Universidade Federal do Pampa; CEP 97650-000; Itaqui; RS; Brazil
| | - Lucielli Savegnago
- Centro de Desenvolvimento Tecnológico, Unidade Biotecnologia; Universidade Federal de Pelotas; Pelotas; RS; Brazil
| | - Letiére Cabreira Soares
- Departamento de Química, Centro de Ciências Naturais e Exatas; Universidade Federal de Santa Maria; Santa Maria; CEP 97105-900; RS; Brazil
| | - Antonio Luiz Braga
- Departamento de Química, Centro de Ciências Naturais e Exatas; Universidade Federal de Santa Maria; Santa Maria; CEP 97105-900; RS; Brazil
| | - Cristiano R. Jesse
- Laboratório de Avaliações Farmacológicas e Toxicológicas Aplicadas às Moléculas Bioativas, LaftamBio Pampa; Universidade Federal do Pampa; CEP 97650-000; Itaqui; RS; Brazil
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21
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Ebselen inhibits iron-induced tau phosphorylation by attenuating DMT1 up-regulation and cellular iron uptake. Neurochem Int 2012; 61:334-40. [DOI: 10.1016/j.neuint.2012.05.016] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Revised: 05/11/2012] [Accepted: 05/13/2012] [Indexed: 12/14/2022]
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22
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A new in vitro injury model of mouse neurons induced by mechanical scratching. Neurosci Lett 2012; 510:14-9. [PMID: 22245654 DOI: 10.1016/j.neulet.2011.12.061] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Revised: 12/28/2011] [Accepted: 12/29/2011] [Indexed: 01/03/2023]
Abstract
The mixed culture of neurons and glial cells has been widely used as a mechanical insult model for the study of neuron injury in vitro. However, a better model is desirable to eliminate the interference of glial cells during the study. Here we report a new model with exclusive cerebellar granule neurons (CGNs), which can be used for the study of in vitro neuron injury without involvement of glial cells. We found that after scratching insult, there was a decrease in both the survival rate and vitality of injured CGNs. Meanwhile, pathological changes were observed by electron microscopy. With this new model, we also tested the effects of neurotrophin-3 (NT-3) on neuroprotection. The result showed that the vitality of injured CGNs was enhanced by the administration of NT-3. These findings demonstrate that this new model is useful for investigation of the precise effect of mechanical damage on neurons excluding other factors, and to detect the neuroprotective effect of certain factors on mechanically injured neurons.
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Dalla Corte CL, Bastos LL, Dobrachinski F, Rocha JB, Soares FA. The combination of organoselenium compounds and guanosine prevents glutamate-induced oxidative stress in different regions of rat brains. Brain Res 2012; 1430:101-11. [DOI: 10.1016/j.brainres.2011.10.049] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Revised: 10/07/2011] [Accepted: 10/28/2011] [Indexed: 10/15/2022]
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24
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Toxicology and pharmacology of selenium: emphasis on synthetic organoselenium compounds. Arch Toxicol 2011; 85:1313-59. [DOI: 10.1007/s00204-011-0720-3] [Citation(s) in RCA: 330] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Accepted: 05/18/2011] [Indexed: 02/07/2023]
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25
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Yin Z, Lee E, Ni M, Jiang H, Milatovic D, Rongzhu L, Farina M, Rocha JBT, Aschner M. Methylmercury-induced alterations in astrocyte functions are attenuated by ebselen. Neurotoxicology 2011; 32:291-9. [PMID: 21300091 PMCID: PMC3079013 DOI: 10.1016/j.neuro.2011.01.004] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Revised: 12/21/2010] [Accepted: 01/08/2011] [Indexed: 12/26/2022]
Abstract
Methylmercury (MeHg) preferentially accumulates in glia of the central nervous system (CNS), but its toxic mechanisms have yet to be fully recognized. In the present study, we tested the hypothesis that MeHg induces neurotoxicity via oxidative stress mechanisms, and that these effects are attenuated by the antioxidant, ebselen. Rat neonatal primary cortical astrocytes were pretreated with or without 10 μM ebselen for 2h followed by MeHg (0, 1, 5, and 10 μM) treatments. MeHg-induced changes in astrocytic [(3)H]-glutamine uptake were assessed along with changes in mitochondrial membrane potential (ΔΨ(m)), using the potentiometric dye tetramethylrhodamine ethyl ester (TMRE). Western blot analysis was used to detect MeHg-induced ERK (extracellular-signal related kinase) phosphorylation and caspase-3 activation. MeHg treatment significantly decreased (p<0.05) astrocytic [(3)H]-glutamine uptake at all time points and concentrations. Ebselen fully reversed MeHg's (1 μM) effect on [(3)H]-glutamine uptake at 1 min. At higher MeHg concentrations, ebselen partially reversed the MeHg-induced astrocytic inhibition of [(3)H]-glutamine uptake [at 1 min (5 and 10 μM) (p<0.05); 5 min (1, 5 and 10 μM) (p<0.05)]. MeHg treatment (1h) significantly (p<0.05) dissipated the ΔΨ(m) in astrocytes as evidenced by a decrease in mitochondrial TMRE fluorescence. Ebselen fully reversed the effect of 1 μM MeHg treatment for 1h on astrocytic ΔΨ(m) and partially reversed the effect of 5 and 10 μM MeHg treatments for 1h on ΔΨ(m). In addition, ebselen inhibited MeHg-induced phosphorylation of ERK (p<0.05) and blocked MeHg-induced activation of caspase-3 (p<0.05-0.01). These results are consistent with the hypothesis that MeHg exerts its toxic effects via oxidative stress and that the phosphorylation of ERK and the dissipation of the astrocytic mitochondrial membrane potential are involved in MeHg toxicity. In addition, the protective effects elicited by ebselen reinforce the idea that organic selenocompounds represent promising strategies to counteract MeHg-induced neurotoxicity.
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MESH Headings
- Analysis of Variance
- Animals
- Animals, Newborn
- Antioxidants/pharmacology
- Astrocytes/drug effects
- Astrocytes/metabolism
- Astrocytes/pathology
- Azoles/pharmacology
- Blotting, Western
- Caspase 3/metabolism
- Cells, Cultured
- Cytoprotection
- Dose-Response Relationship, Drug
- Environmental Pollutants/toxicity
- Extracellular Signal-Regulated MAP Kinases/metabolism
- Glutamine/metabolism
- Isoindoles
- Membrane Potential, Mitochondrial/drug effects
- Mercury Poisoning, Nervous System/etiology
- Mercury Poisoning, Nervous System/metabolism
- Mercury Poisoning, Nervous System/pathology
- Methylmercury Compounds/toxicity
- Microscopy, Fluorescence
- Mitochondria/drug effects
- Mitochondria/metabolism
- Neuroprotective Agents/pharmacology
- Organoselenium Compounds/pharmacology
- Oxidative Stress/drug effects
- Phosphorylation
- Rats
- Rats, Sprague-Dawley
- Time Factors
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Affiliation(s)
- Zhaobao Yin
- Departments of Pediatrics and Pharmacology, the Kennedy Center for Research on Human Development, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Eunsook Lee
- Department of Physiology, Meharry Medical College, Nashville, Tennessee
| | - Mingwei Ni
- Departments of Pediatrics and Pharmacology, the Kennedy Center for Research on Human Development, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Haiyan Jiang
- Departments of Pediatrics and Pharmacology, the Kennedy Center for Research on Human Development, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Dejan Milatovic
- Departments of Pediatrics and Pharmacology, the Kennedy Center for Research on Human Development, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Lu Rongzhu
- Departments of Pediatrics and Pharmacology, the Kennedy Center for Research on Human Development, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Marcelo Farina
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Joao B. T. Rocha
- Departamento de Bioquímica, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Michael Aschner
- Departments of Pediatrics and Pharmacology, the Kennedy Center for Research on Human Development, Vanderbilt University Medical Center, Nashville, Tennessee
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KOIZUMI H, FUJISAWA H, SUEHIRO E, SHIRAO S, SUZUKI M. Neuroprotective Effects of Ebselen Following Forebrain Ischemia: Involvement of Glutamate and Nitric Oxide. Neurol Med Chir (Tokyo) 2011; 51:337-43. [DOI: 10.2176/nmc.51.337] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Hiroyasu KOIZUMI
- Department of Neurosurgery, Yamaguchi University School of Medicine
| | | | - Eiichi SUEHIRO
- Department of Neurosurgery, Yamaguchi University School of Medicine
| | - Satoshi SHIRAO
- Department of Neurosurgery, Yamaguchi University School of Medicine
| | - Michiyasu SUZUKI
- Department of Neurosurgery, Yamaguchi University School of Medicine
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27
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Luchese C, Prigol M, Acker CI, Nogueira CW. Antinociceptive effect of butyl (2-phenylethynyl) selenide on formalin test in mice: Evidences for the involvement of serotonergic and adenosinergic systems. Eur J Pharmacol 2010; 644:49-54. [DOI: 10.1016/j.ejphar.2010.06.047] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2009] [Revised: 06/01/2010] [Accepted: 06/24/2010] [Indexed: 01/22/2023]
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Ouertatani-Sakouhi H, El-Turk F, Fauvet B, Cho MK, Pinar Karpinar D, Le Roy D, Dewor M, Roger T, Bernhagen J, Calandra T, Zweckstetter M, Lashuel HA. Identification and characterization of novel classes of macrophage migration inhibitory factor (MIF) inhibitors with distinct mechanisms of action. J Biol Chem 2010; 285:26581-98. [PMID: 20516071 PMCID: PMC2924096 DOI: 10.1074/jbc.m110.113951] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2010] [Revised: 05/22/2010] [Indexed: 12/12/2022] Open
Abstract
Macrophage migration inhibitory factor (MIF), a proinflammatory cytokine, is considered an attractive therapeutic target in multiple inflammatory and autoimmune disorders. In addition to its known biologic activities, MIF can also function as a tautomerase. Several small molecules have been reported to be effective inhibitors of MIF tautomerase activity in vitro. Herein we employed a robust activity-based assay to identify different classes of novel inhibitors of the catalytic and biological activities of MIF. Several novel chemical classes of inhibitors of the catalytic activity of MIF with IC(50) values in the range of 0.2-15.5 microm were identified and validated. The interaction site and mechanism of action of these inhibitors were defined using structure-activity studies and a battery of biochemical and biophysical methods. MIF inhibitors emerging from these studies could be divided into three categories based on their mechanism of action: 1) molecules that covalently modify the catalytic site at the N-terminal proline residue, Pro(1); 2) a novel class of catalytic site inhibitors; and finally 3) molecules that disrupt the trimeric structure of MIF. Importantly, all inhibitors demonstrated total inhibition of MIF-mediated glucocorticoid overriding and AKT phosphorylation, whereas ebselen, a trimer-disrupting inhibitor, additionally acted as a potent hyperagonist in MIF-mediated chemotactic migration. The identification of biologically active compounds with known toxicity, pharmacokinetic properties, and biological activities in vivo should accelerate the development of clinically relevant MIF inhibitors. Furthermore, the diversity of chemical structures and mechanisms of action of our inhibitors makes them ideal mechanistic probes for elucidating the structure-function relationships of MIF and to further determine the role of the oligomerization state and catalytic activity of MIF in regulating the function(s) of MIF in health and disease.
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Affiliation(s)
- Hajer Ouertatani-Sakouhi
- From the Laboratory of Molecular Neurobiology and Functional Neuroproteomics, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Farah El-Turk
- From the Laboratory of Molecular Neurobiology and Functional Neuroproteomics, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Bruno Fauvet
- From the Laboratory of Molecular Neurobiology and Functional Neuroproteomics, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Min-Kyu Cho
- the Department of NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, 37077 Goettingen, Germany
| | - Damla Pinar Karpinar
- the Department of NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, 37077 Goettingen, Germany
| | - Didier Le Roy
- the Department of Medicine, Infectious Diseases Service, Centre Hospitalier Universitaire Vaudois and University of Lausanne, CH-1011 Lausanne, Switzerland, and
| | - Manfred Dewor
- the Department of Biochemistry and Molecular Cell Biology, Institute of Biochemistry and Molecular Biology, Rheinisch-Westfälische, Technische Hochschule (RWTH) Aachen University, Aachen 52074, Germany
| | - Thierry Roger
- the Department of Medicine, Infectious Diseases Service, Centre Hospitalier Universitaire Vaudois and University of Lausanne, CH-1011 Lausanne, Switzerland, and
| | - Jürgen Bernhagen
- the Department of Biochemistry and Molecular Cell Biology, Institute of Biochemistry and Molecular Biology, Rheinisch-Westfälische, Technische Hochschule (RWTH) Aachen University, Aachen 52074, Germany
| | - Thierry Calandra
- the Department of Medicine, Infectious Diseases Service, Centre Hospitalier Universitaire Vaudois and University of Lausanne, CH-1011 Lausanne, Switzerland, and
| | - Markus Zweckstetter
- the Department of NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, 37077 Goettingen, Germany
| | - Hilal A. Lashuel
- From the Laboratory of Molecular Neurobiology and Functional Neuroproteomics, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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Amar S, Ovadia O, Maier W, Ebstein R, Belmaker RH, Mishmar D, Agam G. Copy number variation of the SELENBP1 gene in schizophrenia. Behav Brain Funct 2010; 6:40. [PMID: 20615253 PMCID: PMC2915948 DOI: 10.1186/1744-9081-6-40] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Accepted: 07/08/2010] [Indexed: 12/12/2022] Open
Abstract
Background Schizophrenia is associated with rare copy-number (CN) mutations. Screening for such alleles genome-wide, though comprehensive, cannot study in-depth the causality of particular loci, therefore cannot provide the functional interpretation for the disease etiology. We hypothesized that CN mutations in the SELENBP1 locus could associate with the disorder and that these mutations could alter the gene product's activity in patients. Methods We analyzed SELENBP1 CN variation (CNV) in blood DNA from 49 schizophrenia patients and 49 controls (cohort A). Since CN of genes may vary among tissues, we investigated SELENBP1 CN in age- sex- and postmortem interval-matched cerebellar DNA samples from 14 patients and 14 controls (cohort B). Since CNV may either be de-novo or inherited we analyzed CNV of the SELENBP1 locus in blood DNA from 26 trios of schizophrenia probands and their healthy parents (cohort C). SELENBP1 mRNA levels were measured by real-time PCR. Results In cohort A reduced CN of the SELENBP1 locus was found in four patients but in none of the controls. In cohort B we found reduced CN of the SELENBP1 locus in two patients but in none of the controls. In cohort C three patients exhibited drastic CN reduction, not present in their parents, indicating de-novo mutation. A reduction in SELENBP1 mRNA levels in the postmortem cerebellar samples of schizophrenia patients was found. Conclusions We report a focused study of CN mutations in the selenium binding-protein1 (SELENBP1) locus previously linked with schizophrenia. We provide evidence for recurrence of decreased CN of the SELENBP1 locus in three unrelated patients' cohorts but not in controls, raising the possibility of functional involvement of these mutations in the etiology of the disease.
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Affiliation(s)
- Shirly Amar
- Psychiatry Research Unit, Faculty of Health Sciences, Ben-Gurion University of the Negev, and Mental Health Center, Beersheva, Israel
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Wilhelm EA, Jesse CR, Prigol M, Alves D, Schumacher RF, Nogueira CW. 3-Alkynyl selenophene protects against carbon-tetrachloride-induced and 2-nitropropane-induced hepatic damage in rats. Cell Biol Toxicol 2010; 26:569-77. [PMID: 20397041 DOI: 10.1007/s10565-010-9164-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2009] [Accepted: 03/31/2010] [Indexed: 11/24/2022]
Abstract
The aim of this study was to investigate the protective effect of 3-alkynyl selenophene (3-ASP) on acute liver injury induced by carbon tetrachloride (CCl(4)) and 2-nitropropane (2-NP) in rats. On the first day of treatment, the animals received 3-ASP (25 mg/kg, p.o.). On the second day, the rats received CCl(4) (1 mg/kg, i.p.) or 2-NP (100 mg/kg, p.o.). Twenty-four hours after CCl(4) or 2-NP administration, the animals were euthanized, and their plasma and liver were removed for biochemical and histological analyses. The histological analysis revealed extensive injury in the liver of CCl(4)-exposed and 2-NP-exposed rats, which was attenuated by 3-ASP. 3-ASP significantly attenuated (1) the increase in plasmatic aspartate and alanine aminotransferase activities and lipid peroxidation levels induced by CCl(4) and 2-NP; (2) the inhibition of δ-aminolevulinic dehydratase activity caused by 2-NP; and (3) the decrease in ascorbic acid (AA) levels and catalase (CAT) activity caused by CCl(4). AA levels and CAT activity remained unaltered in the liver of rats exposed to 2-NP. The protective effect of 3-ASP on acute liver injury induced by CCl(4) and 2-NP in rats was demonstrated.
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Affiliation(s)
- Ethel Antunes Wilhelm
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, CEP 97105-900, RS, Brazil
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Da Rocha JT, Sperança A, Nogueira CW, Zeni G. Hypolipidaemic activity of orally administered diphenyl diselenide in Triton WR-1339-induced hyperlipidaemia in mice. J Pharm Pharmacol 2010. [DOI: 10.1211/jpp.61.12.0013] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Abstract
Objectives
A significant association between the trace element selenium and hyper-cholesterolaemia has been reported. This study was designed to investigate a potential hypolipidaemic effect of diphenyl diselenide ((PhSe)2) in Triton WR-1339-induced hyperlipidaemia in mice.
Methods
Triton was administered intraperitoneally (400 mg/kg) to overnight-fasted mice to develop acute hyperlipidaemia. (PhSe)2 was administered orally (10 mg/kg) 30 min before Triton. At 24 h after Triton injection, blood samples were collected to measure plasma lipid levels. The hepatic thiobarbituric acid reactive substances and ascorbic acid levels as well as catalase and glutathione peroxidase activity were recorded.
Key findings
(PhSe)2 administration significantly lowered total cholesterol, non-high-density lipoprotein-cholesterol and triglycerides, whilst it increased high-density lipoprotein-cholesterol levels in plasma of hyperlipidaemic mice. Neither oxidative stress nor the antioxidant effect of (PhSe)2 was observed in the mouse liver in this experimental protocol.
Conclusions
These findings indicated that (PhSe)2 was able to lower plasma lipid concentrations. Further studies are needed to elucidate the exact mechanism by which (PhSe)2 exerted its hypolipidaemic effect in the management of hyperlipidaemia and atherosclerosis.
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Affiliation(s)
- Juliana Trevisan Da Rocha
- Laboratório de Síntese, Reatividade e Avaliação Farmacológica e Toxicológica de Organocalcogênios, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Adriane Sperança
- Laboratório de Síntese, Reatividade e Avaliação Farmacológica e Toxicológica de Organocalcogênios, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Cristina Wayne Nogueira
- Laboratório de Síntese, Reatividade e Avaliação Farmacológica e Toxicológica de Organocalcogênios, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Gilson Zeni
- Laboratório de Síntese, Reatividade e Avaliação Farmacológica e Toxicológica de Organocalcogênios, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, Brazil
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Ardais AP, Viola GG, Costa MS, Nunes F, Behr GA, Klamt F, Moreira JCF, Souza DO, Rocha JBT, Porciúncula LO. Acute Treatment with Diphenyl Diselenide Inhibits Glutamate Uptake into Rat Hippocampal Slices and Modifies Glutamate Transporters, SNAP-25, and GFAP Immunocontent. Toxicol Sci 2009; 113:434-43. [DOI: 10.1093/toxsci/kfp282] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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Goudarzvand M, Javan M, Mirnajafi-Zadeh J, Mozafari S, Tiraihi T. Vitamins E and D3 Attenuate Demyelination and Potentiate Remyelination Processes of Hippocampal Formation of Rats Following Local Injection of Ethidium Bromide. Cell Mol Neurobiol 2009; 30:289-99. [DOI: 10.1007/s10571-009-9451-x] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2009] [Accepted: 08/26/2009] [Indexed: 01/21/2023]
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Ben Amara I, Fetoui H, Guermazi F, Zeghal N. Dietary selenium addition improves cerebrum and cerebellum impairments induced by methimazole in suckling rats. Int J Dev Neurosci 2009; 27:719-26. [DOI: 10.1016/j.ijdevneu.2009.07.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2009] [Revised: 07/03/2009] [Accepted: 07/06/2009] [Indexed: 10/20/2022] Open
Affiliation(s)
- Ibtissem Ben Amara
- Animal Physiology LaboratorySfax Faculty of ScienceBP 11713000SfaxTunisia
| | - Hamadi Fetoui
- Animal Physiology LaboratorySfax Faculty of ScienceBP 11713000SfaxTunisia
| | - Fadhel Guermazi
- Nuclear Medicine Service, CHU Habib Bourguiba3029SfaxTunisia
| | - Najiba Zeghal
- Animal Physiology LaboratorySfax Faculty of ScienceBP 11713000SfaxTunisia
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Tripathi DN, Jena GB. Ebselen attenuates cyclophosphamide-induced oxidative stress and DNA damage in mice. Free Radic Res 2009; 42:966-77. [DOI: 10.1080/10715760802566558] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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37
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Corte CLD, Fachinetto R, Puntel R, Wagner C, Nogueira CW, Soares FAA, Rocha JBT. Chronic Treatment with Fluphenazine Alters Parameters of Oxidative Stress in Liver and Kidney of Rats. Basic Clin Pharmacol Toxicol 2009; 105:51-7. [DOI: 10.1111/j.1742-7843.2009.00417.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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38
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Wilhelm EA, Jesse CR, Nogueira CW, Savegnago L. Introduction of trifluoromethyl group into diphenyl diselenide molecule alters its toxicity and protective effect against damage induced by 2-nitropropane in rats. ACTA ACUST UNITED AC 2009; 61:197-203. [DOI: 10.1016/j.etp.2008.08.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2008] [Revised: 08/18/2008] [Accepted: 08/27/2008] [Indexed: 10/21/2022]
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39
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Posser T, Kaster MP, Baraúna SC, Rocha JB, Rodrigues ALS, Leal RB. Antidepressant-like effect of the organoselenium compound ebselen in mice: Evidence for the involvement of the monoaminergic system. Eur J Pharmacol 2009; 602:85-91. [DOI: 10.1016/j.ejphar.2008.10.055] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2007] [Revised: 10/13/2008] [Accepted: 10/31/2008] [Indexed: 01/13/2023]
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40
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Pre‐treatment with ebselen and vitamin E modulate acetylcholinesterase activity: interaction with demyelinating agents. Int J Dev Neurosci 2008; 27:73-80. [DOI: 10.1016/j.ijdevneu.2008.09.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2008] [Revised: 09/05/2008] [Accepted: 09/23/2008] [Indexed: 11/23/2022] Open
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41
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Meotti FC, Borges VC, Perottoni J, Nogueira CW. Toxicological evaluation of subchronic exposure to diphenyl diselenide in rats. J Appl Toxicol 2008; 28:638-44. [DOI: 10.1002/jat.1315] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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42
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The effects of selenium against cerebral ischemia-reperfusion injury in rats. Neurosci Lett 2008; 438:265-9. [DOI: 10.1016/j.neulet.2008.03.091] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2008] [Revised: 02/27/2008] [Accepted: 03/07/2008] [Indexed: 11/17/2022]
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43
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Yamagata K, Ichinose S, Miyashita A, Tagami M. Protective effects of ebselen, a seleno-organic antioxidant on neurodegeneration induced by hypoxia and reperfusion in stroke-prone spontaneously hypertensive rat. Neuroscience 2008; 153:428-35. [DOI: 10.1016/j.neuroscience.2008.02.028] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2007] [Revised: 02/04/2008] [Accepted: 02/18/2008] [Indexed: 12/17/2022]
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44
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Ghisleni G, Porciúncula LO, Mioranzza S, Boeck CR, Rocha JBT, Souza DO. Selenium compounds counteract the stimulation of ecto-nucleotidase activities in rat cultured cerebellar granule cells: putative correlation with neuroprotective effects. Brain Res 2008; 1221:134-40. [PMID: 18554575 DOI: 10.1016/j.brainres.2008.04.033] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2008] [Revised: 04/15/2008] [Accepted: 04/17/2008] [Indexed: 11/18/2022]
Abstract
Glutamate is the main excitatory neurotransmitter in brain involved in pathophysiology of several brain injuries. In this context, glutamate showed to stimulate ecto-nucleotidase activities in cerebellar granule cells increasing extracellular adenosine levels, an important neuromodulator in the CNS able to prevent cell damage. The organoselenium compounds, such as ebselen and diphenyl diselenide [(PhSe)(2)], display neuroprotective activities mediated at least in part by their antioxidant and anti-inflammatory properties. Ebselen was described to prevent glutamate-induced lipid peroxidation and cell death in cerebellar granule cells and (PhSe)(2) modify glutamatergic synapse parameters in vitro and in vivo. In the present study, we investigated the effects of ebselen or (PhSe)(2) on glutamate-induced stimulation of ecto-nucleotidase activities in rat cultured cerebellar granule cells. Glutamate increased nucleotide hydrolysis at lower concentrations (10 and 100 microM) than described in the literature and this effect was counteracted by both organoselenium compounds tested. Based on these results, we investigated the association of organoselenium effects with their antioxidant properties searching for redox site modulation by using the alkylant agent N-ethylmaleimide (NEM). Our results suggest that selenium compounds, as well as the well-known antioxidant trolox, can avoid the increase on glutamate-induced stimulation of ecto-nucleotidase activities probably due to their antioxidant properties.
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Affiliation(s)
- Gabriele Ghisleni
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
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Posser T, Franco JL, dos Santos DA, Rigon AP, Farina M, Dafré AL, Teixeira Rocha JB, Leal RB. Diphenyl diselenide confers neuroprotection against hydrogen peroxide toxicity in hippocampal slices. Brain Res 2008; 1199:138-47. [DOI: 10.1016/j.brainres.2008.01.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2007] [Revised: 12/28/2007] [Accepted: 01/03/2008] [Indexed: 01/05/2023]
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46
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Stangherlin EC, Luchese C, Pinton S, Rocha JBT, Nogueira CW. Sub-chronical exposure to diphenyl diselenide enhances acquisition and retention of spatial memory in rats. Brain Res 2008; 1201:106-13. [DOI: 10.1016/j.brainres.2008.01.061] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2007] [Revised: 11/19/2007] [Accepted: 01/20/2008] [Indexed: 11/16/2022]
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47
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Ardais AP, Santos FW, Nogueira CW. Ebselen attenuates cadmium-induced testicular damage in mice. J Appl Toxicol 2008; 28:322-8. [PMID: 17624921 DOI: 10.1002/jat.1282] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This study was designed to examine if ebselen, an organoselenium compound with antioxidant and glutathione peroxidase-mimetic properties, attenuates testicular injury caused by intraperitoneal administration of CdCl(2). A number of toxicological parameters were evaluated in the testes of mice, such as delta-aminolevulinic acid dehydratase (delta-ALA-D) activity, lipid peroxidation, ascorbic acid levels and alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activities. Ebselen attenuated lipid peroxidation levels altered by CdCl(2). delta-ALA-D activity inhibited by the highest dose of CdCl(2) was attenuated by ebselen. A significant negative correlation between lipid peroxidation levels and delta-ALA-D activity was observed. Ebselen restored ascorbic acid levels reduced by CdCl(2). A significant negative correlation between ascorbic acid levels and delta-ALA-D activity reinforces the idea that ebselen attenuated the damage induced by CdCl(2) via its antioxidant property. The significant correlation between ALT and delta-ALA-D activity supports the assumption that ebselen prevented damage caused by CdCl(2). The results show that ebselen attenuated oxidative stress, a process important for CdCl(2) toxicity.
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Affiliation(s)
- Ana P Ardais
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, CEP 97105-900, RS, Brazil
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Golombieski RM, Graichen DÂS, Rocha JBTD, Valente VLDS, Loreto ÉLDS. Over-activation of the Drosophila melanogaster hsp83 gene by selenium intoxication. Genet Mol Biol 2008. [DOI: 10.1590/s1415-47572008000100022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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49
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Moretto MB, Boff B, Franco J, Posser T, Roessler TM, Souza DO, Nogueira CW, Wofchuk S, Rocha JBT. 45Ca2+ Influx in Rat Brain: Effect of Diorganylchalcogenides Compounds. Toxicol Sci 2007; 99:566-71. [PMID: 17656489 DOI: 10.1093/toxsci/kfm187] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In nervous tissue, the calcium (Ca(2+)) release induces neurotransmitter exocytosis and synaptic plasticity in neurons and is essential for Ca(2+) waves and oscillations in astrocytes. In this work, we have investigated the effect of organocalchogens on calcium influx in synaptosomal preparations under basal and depolarizing conditions. Acute administration of ebselen caused a significant increase of 34% (p < 0.05) Ca(2+) influx, when under basal conditions but showed no effect on potassium stimulated calcium conditions by brain synaptosomes. Diphenyl ditelluride (PhTe)(2) increased (45)Ca(2+) influx by 40% (p < 0.05) under depolarizing conditions, while diphenyl diselenide (PhSe)(2) had no effect on the brain synaptosomes studied. In addition, we characterized an "in vitro" model with the purpose of studying Ca(2+) movements in slices. In this model, we examined the effect of diorganylchalcogenides using brain hippocampal slices, which showed the decrease of calcium influx with the three drugs studied. These findings showed that there are different effects of diorganylchalcogenides in the different models evaluated. It is possible that these differential effects result from the action of neural signal transduction pathways at different levels, possibly involving neurotransmitter release and channel targeting.
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Affiliation(s)
- Maria B Moretto
- Departamento de Análises Clínicas e Toxicológicas, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, 97105-900-Santa Maria, RS, Brasil.
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50
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Moretto MB, Thomazi AP, Godinho G, Roessler TM, Nogueira CW, Souza DO, Wofchuk S, Rocha JBT. Ebselen and diorganylchalcogenides decrease in vitro glutamate uptake by RAT brain slices: Prevention by DTT and GSH. Toxicol In Vitro 2007; 21:639-45. [PMID: 17321101 DOI: 10.1016/j.tiv.2006.12.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2006] [Revised: 12/01/2006] [Accepted: 12/26/2006] [Indexed: 10/23/2022]
Abstract
The purpose of this study was to investigate the possible involvement of the glutamatergic system in the neurotoxicity of diorganylchalcogenides or organochalcogenides from slices of cerebral cortex in different ages of development: 12- and 60-day-old rats. Glutamate uptake was evaluated in cortical slices of 12 and 60 days old rats. Cortex slices were incubated with three different organochalcogenides with or without reduced glutathione or dithiothreitol. At 100 microM, ebselen, diphenyl diselenide (PhSe)2 and diphenyl ditelluride (PhTe)2 in vitro inhibited the [3H]glutamate uptake in both age. Both 60-day-old rats and for 12-day-old rats, GSH and DTT prevented the (PhTe)2-induced inhibition of glutamate uptake but did not protect the inhibition caused by ebselen and (PhSe)2. These findings suggest that the neurotoxicity of organochalcogenides could be related to their effects on brain glutamate uptake, conceivably involving a redox modulation of reactive amino acids from the glutamate transporter proteins.
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Affiliation(s)
- M B Moretto
- Departamento de Análises Clínicas e Toxicológicas, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
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