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Shekarchian M, Peeri M, Azarbayjani MA. Physical activity in a swimming pool attenuates memory impairment by reducing glutamate and inflammatory cytokines and increasing BDNF in the brain of mice with type 2 diabetes. Brain Res Bull 2023; 201:110725. [PMID: 37543294 DOI: 10.1016/j.brainresbull.2023.110725] [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: 09/05/2022] [Revised: 07/01/2023] [Accepted: 08/02/2023] [Indexed: 08/07/2023]
Abstract
Type 2 diabetes is a risk factor for the development of cognitive impairment. Increasing evidence suggests that regular exercise is beneficial for the treatment of clinical symptoms in diabetic patients. The current study aimed to evaluate whether increasing physical activity through swimming training can reduce memory impairment in an animal model of type 2 diabetes. Diabetes and non-diabetes mice underwent swimming training for four weeks, and then working, spatial, and recognition memory were evaluated using three behavioral tests. Body weight, glucose, and insulin resistance were monitored. We also measured inflammatory cytokines (interleukin (IL)- 6, IL-1β, and tumor-necrosis-factor (TNF)-α), an anti-inflammatory cytokine (IL-10), and brain-derived-neurotrophic-factor (BDNF), and glutamate levels in the hippocampus or prefrontal cortex of mice. The findings showed that diabetes increased body weight, glucose, and insulin resistance, impaired working, spatial and recognition memory, increased levels of IL-6, IL-1β, TNF-α, and glutamate levels, and decreased BDNF in the hippocampus of diabetic mice. While higher physical activity was associated with reduced body weight, glucose, and insulin resistance, attenuated memory impairment, IL-6, IL-1β, TNF-α, and glutamate, and increased BDNF levels in the hippocampus and prefrontal cortex of diabetic mice. This study shows that swimming training can normalize body weight and glucose-insulin axis and reduce inflammation and glutamate in the hippocampus and enhance the neurotrophic system in both the hippocampus and prefrontal cortex of diabetic mice. This study also suggests that higher physical activity through swimming training can improve cognitive impairment in a mouse model of type 2 diabetes.
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Affiliation(s)
- Mandana Shekarchian
- Department of Exercise Physiology, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Maghsoud Peeri
- Department of Exercise Physiology, Central Tehran Branch, Islamic Azad University, Tehran, Iran.
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Mocci I, Casu MA, Sogos V, Liscia A, Angius R, Cadeddu F, Fanti M, Muroni P, Talani G, Diana A, Collu M, Setzu MD. Effects of memantine on mania-like phenotypes exhibited by Drosophila Shaker mutants. CNS Neurosci Ther 2023. [PMID: 36942502 DOI: 10.1111/cns.14145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 02/17/2023] [Accepted: 02/19/2023] [Indexed: 03/23/2023] Open
Abstract
INTRODUCTION Increased glutamate levels and electrolytic fluctuations have been observed in acutely manic patients. Despite some efficacy of the non-competitive NMDA receptor antagonist memantine (Mem), such as antidepressant-like and mood-stabilizer drugs in clinical studies, its specific mechanisms of action are still uncertain. The present study aims to better characterize the Drosophila melanogaster fly Shaker mutants (SH), as a translational model of manic episodes within bipolar disorder in humans, and to investigate the potential anti-manic properties of Mem. METHODS AND RESULTS Our findings showed typical behavioral abnormalities in SH, which mirrored with the overexpression of NMDAR-NR1 protein subunit, matched well to glutamate up-regulation. Such molecular features were associated to a significant reduction of SH brain volume in comparison to Wild Type strain flies (WT). Here we report on the ability of Mem treatment to ameliorate behavioral aberrations of SH (similar to that of Lithium), and its ability to reduce NMDAR-NR1 over-expression. CONCLUSIONS Our results show the involvement of the glutamatergic system in the SH, given the interaction between the Shaker channel and the NMDA receptor, suggesting this model as a promising tool for studying the neurobiology of bipolar disorders. Moreover, our results show Mem as a potential disease-modifying therapy, providing insight on new mechanisms of action.
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Affiliation(s)
- Ignazia Mocci
- Institute of Translational Pharmacology, National Research Council, Science and Technology Park of Sardinia, Cagliari, Italy
| | - Maria Antonietta Casu
- Institute of Translational Pharmacology, National Research Council, Science and Technology Park of Sardinia, Cagliari, Italy
| | - Valeria Sogos
- Department of Biomedical Sciences, University of Cagliari, Monserrato, Italy
| | - Anna Liscia
- Department of Biomedical Sciences, University of Cagliari, Monserrato, Italy
| | - Rossella Angius
- Unit of Biomedical Research Support, NMR Laboratory and Bioanalytical Technologies, Sardegna Ricerche, Science and Technology Park of Sardinia, Cagliari, Italy
| | - Francesca Cadeddu
- Department of Biomedical Sciences, University of Cagliari, Monserrato, Italy
| | - Maura Fanti
- Department of Biomedical Sciences, University of Cagliari, Monserrato, Italy
| | - Patrizia Muroni
- Department of Biomedical Sciences, University of Cagliari, Monserrato, Italy
| | - Giuseppe Talani
- Institute of Neuroscience, National Research Council, Monserrato, Italy
| | - Andrea Diana
- Department of Biomedical Sciences, University of Cagliari, Monserrato, Italy
| | - Maria Collu
- Department of Biomedical Sciences, University of Cagliari, Monserrato, Italy
| | - Maria Dolores Setzu
- Department of Biomedical Sciences, University of Cagliari, Monserrato, Italy
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Shang M, Tang M, Xue Y. Neurodevelopmental toxicity induced by airborne particulate matter. J Appl Toxicol 2023; 43:167-185. [PMID: 35995895 DOI: 10.1002/jat.4382] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 08/17/2022] [Accepted: 08/17/2022] [Indexed: 11/08/2022]
Abstract
Airborne particulate matter (PM), the primary component associated with health risks in air pollution, can negatively impact human health. Studies have shown that PM can enter the brain by inhalation, but data on the exact quantity of particles that reach the brain are unknown. Particulate matter exposure can result in neurotoxicity. Exposure to PM poses a greater health risk to infants and children because their nervous systems are not fully developed. This review paper highlights the association between PM and neurodevelopmental toxicity (NDT). Exposure to PM can induce oxidative stress and inflammation, potentially resulting in blood-brain barrier damage and increased susceptibility to development of neurodevelopmental disorders (NDD), such as autism spectrum disorders and attention deficit disorders. In addition, human and animal exposure to PM can induce microglia activation and epigenetic alterations and alter the neurotransmitter levels, which may increase risks for development of NDD. However, the systematic comparisons of the effects of PM on NDD at different ages of exposure are deficient. The elucidation of PM exposure risks and NDT in children during the early developmental stages are of great importance. The synthesis of current research may help to identify markers and mechanisms of PM-induced neurodevelopmental toxicity, allowing for the development of strategies to prevent permanent damage of developing brain.
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Affiliation(s)
- Mengting Shang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Meng Tang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Yuying Xue
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
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Gruenbaum BF, Zlotnik A, Fleidervish I, Frenkel A, Boyko M. Glutamate Neurotoxicity and Destruction of the Blood–Brain Barrier: Key Pathways for the Development of Neuropsychiatric Consequences of TBI and Their Potential Treatment Strategies. Int J Mol Sci 2022; 23:ijms23179628. [PMID: 36077024 PMCID: PMC9456007 DOI: 10.3390/ijms23179628] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/17/2022] [Accepted: 08/22/2022] [Indexed: 11/18/2022] Open
Abstract
Traumatic brain injury (TBI) is associated with significant cognitive and psychiatric conditions. Neuropsychiatric symptoms can persist for years following brain injury, causing major disruptions in patients’ lives. In this review, we examine the role of glutamate as an aftereffect of TBI that contributes to the development of neuropsychiatric conditions. We hypothesize that TBI causes long-term blood–brain barrier (BBB) dysfunction lasting many years and even decades. We propose that dysfunction in the BBB is the central factor that modulates increased glutamate after TBI and ultimately leads to neurodegenerative processes and subsequent manifestation of neuropsychiatric conditions. Here, we have identified factors that determine the upper and lower levels of glutamate concentration in the brain after TBI. Furthermore, we consider treatments of disruptions to BBB integrity, including repairing the BBB and controlling excess glutamate, as potential therapeutic modalities for the treatment of acute and chronic neuropsychiatric conditions and symptoms. By specifically focusing on the BBB, we hypothesize that restoring BBB integrity will alleviate neurotoxicity and related neurological sequelae.
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Affiliation(s)
- Benjamin F. Gruenbaum
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Jacksonville, FL 32224, USA
| | - Alexander Zlotnik
- Department of Anesthesiology and Critical Care, Soroka University Medical Center, Ben-Gurion of the Negev, Beer-Sheva 84105, Israel
| | - Ilya Fleidervish
- Department of Physiology and Cell Biology, Faculty of Health Sciences and Zlotowski Center for Neuroscience, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Amit Frenkel
- Department of Anesthesiology and Critical Care, Soroka University Medical Center, Ben-Gurion of the Negev, Beer-Sheva 84105, Israel
| | - Matthew Boyko
- Department of Anesthesiology and Critical Care, Soroka University Medical Center, Ben-Gurion of the Negev, Beer-Sheva 84105, Israel
- Correspondence:
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5
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AL-Nasser MN, Mellor IR, Carter WG. Is L-Glutamate Toxic to Neurons and Thereby Contributes to Neuronal Loss and Neurodegeneration? A Systematic Review. Brain Sci 2022; 12:brainsci12050577. [PMID: 35624964 PMCID: PMC9139234 DOI: 10.3390/brainsci12050577] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/26/2022] [Accepted: 04/26/2022] [Indexed: 01/27/2023] Open
Abstract
L-glutamate (L-Glu) is a nonessential amino acid, but an extensively utilised excitatory neurotransmitter with critical roles in normal brain function. Aberrant accumulation of L-Glu has been linked to neurotoxicity and neurodegeneration. To investigate this further, we systematically reviewed the literature to evaluate the effects of L-Glu on neuronal viability linked to the pathogenesis and/or progression of neurodegenerative diseases (NDDs). A search in PubMed, Medline, Embase, and Web of Science Core Collection was conducted to retrieve studies that investigated an association between L-Glu and pathology for five NDDs: Alzheimer’s disease (AD), Parkinson’s disease (PD), multiple sclerosis (MS), amyotrophic lateral sclerosis (ALS), and Huntington’s disease (HD). Together, 4060 studies were identified, of which 71 met eligibility criteria. Despite several inadequacies, including small sample size, employment of supraphysiological concentrations, and a range of administration routes, it was concluded that exposure to L-Glu in vitro or in vivo has multiple pathogenic mechanisms that influence neuronal viability. These mechanisms include oxidative stress, reduced antioxidant defence, neuroinflammation, altered neurotransmitter levels, protein accumulations, excitotoxicity, mitochondrial dysfunction, intracellular calcium level changes, and effects on neuronal histology, cognitive function, and animal behaviour. This implies that clinical and epidemiological studies are required to assess the potential neuronal harm arising from excessive intake of exogenous L-Glu.
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Affiliation(s)
- Maryam N. AL-Nasser
- Department of Biological Sciences, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia;
- School of Life Sciences, Faculty of Medicine and Health Sciences, University of Nottingham, Nottingham NG7 2RD, UK;
- School of Medicine, Royal Derby Hospital Centre, University of Nottingham, Derby DE22 3DT, UK
| | - Ian R. Mellor
- School of Life Sciences, Faculty of Medicine and Health Sciences, University of Nottingham, Nottingham NG7 2RD, UK;
| | - Wayne G. Carter
- School of Medicine, Royal Derby Hospital Centre, University of Nottingham, Derby DE22 3DT, UK
- Correspondence: ; Tel.: +44-(0)-1332-724738; Fax: +44-(0)-1332-724626
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Raghu SV, Kudva AK, Rao S, Prasad K, Mudgal J, Baliga MS. Dietary agents in mitigating chemotherapy-related cognitive impairment (chemobrain or chemofog): first review addressing the benefits, gaps, challenges and ways forward. Food Funct 2021; 12:11132-11153. [PMID: 34704580 DOI: 10.1039/d1fo02391h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Chemobrain or chemofog is one of the important but less investigated side effects, where the cancer survivors treated with chemotherapy develop long-term cognitive impairments, affecting their quality of life. The biological mechanisms triggering the development of chemobrain are largely unknown. However, a literature study suggests the generation of free radicals, oxidative stress, inflammatory cytokines, epigenetic chromatin remodeling, decreased neurogenesis, secretion of brain-derived neurotropic factor (BDNF), dendritic branching, and neurotransmitter release to be the cumulative contributions to the ailment. Unfortunately, there is no means to prevent/mitigate the development and intensity of chemobrain. Given the lack of effective prevention strategies or treatments, preclinical studies have been underway to ascertain the usefulness of natural products in mitigating chemobrain in the recent past. Natural products used in diets have been shown to provide beneficial effects by inhibition of free radicals, oxidative stress, inflammatory processes, and/or concomitant upregulation of various cell survival proteins. For the first time, this review focuses on the published effects of astaxanthin, omega-3 fatty acids, ginsenoside, cotinine, resveratrol, polydatin, catechin, rutin, naringin, curcumin, dehydrozingerone, berberine, C-phycocyanin, the higher fungi Cordyceps militaris, thyme (Thymus vulgaris) and polyherbal formulation Mulmina™ in mitigating cognitive impairments in preclinical models of study, and also addresses their potential neuro-therapeutic mechanisms and applications in preventing/ameliorating chemobrain.
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Affiliation(s)
- Shamprasad Varija Raghu
- Neurogenetics Laboratory, Department of Applied Zoology, Mangalore University, Mangalagangotri, Karnataka 574199, India
| | - Avinash Kundadka Kudva
- Department of Biochemistry, Mangalore University, Mangalagangotri, Karnataka 574199, India
| | - Suresh Rao
- Radiation Oncology, Mangalore Institute of Oncology, Mangalore, Karnataka 575002, India
| | - Krishna Prasad
- Medical Oncology, Mangalore Institute of Oncology, Mangalore, Karnataka 575002, India
| | - Jayesh Mudgal
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
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Ferrari CZ, Ribeiro R, Lima AM, Soares AM, Cavalcante WLG, Vieira LB. Gyroxin, a toxin from Crotalus durissus terrificus snake venom, induces a calcium dependent increase in glutamate release in mice brain cortical synaptosomes. Neuropeptides 2020; 83:102081. [PMID: 32839009 DOI: 10.1016/j.npep.2020.102081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 08/10/2020] [Accepted: 08/10/2020] [Indexed: 01/09/2023]
Abstract
Gyroxin is a thrombin-like toxin obtained from the venom of the South American rattlesnake, Crotalus durissus terrificus. Literature has reported "gyroxin syndrome" characterized, in mice, as series of aberrant motor behavior, known as barrel rotation, mainly after intraperitoneal administration. Despites several studies, a physiological mechanism of "gyroxin syndrome" are still not completely understood. In this context, alterations on the central nervous system (CNS), especially causing neurotoxic events, are pointed out as likely candidates. Then, we decided to investigate whether gyroxin induces alterations in glutamate release, one of the most important neurotransmitter involved in neurotoxicity. For that, we performed all experiments, in vitro, using a model of mice brain cortical synaptosomes. Notably, our results indicate that the administration of gyroxin on purified presynaptic brain cortical terminals resulted in an extracellular Ca2+- dependent raise in glutamate release. Indeed, our results also showed that gyroxin increases intrasynaptosomal calcium (Ca2+) levels through acting on voltage gated calcium channels (VGCC), specifically N and P/Q subtypes. Moreover, our data show that gyroxin increases exocytosis rate. Interestingly, these data suggest that gyroxin might induce neurotoxicity by increasing glutamate levels. However, future investigations are needed in order to elucidate the nature of the following events.
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Affiliation(s)
- C Z Ferrari
- Department of Pharmacology, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - R Ribeiro
- Department of Pharmacology, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - A M Lima
- Laboratório de Biotecnologia de Proteínas e Compostos Bioativos da Amazônia Ocidental, LaBioProt, Centro de Estudos de Biomoléculas Aplicadas à Saúde, CEBio, Fundação Oswaldo Cruz, FIOCRUZ, Fiocruz Rondônia e Universidade Federal de Rondônia, UNIR, Porto Velho, RO, Brazil
| | - A M Soares
- Laboratório de Biotecnologia de Proteínas e Compostos Bioativos da Amazônia Ocidental, LaBioProt, Centro de Estudos de Biomoléculas Aplicadas à Saúde, CEBio, Fundação Oswaldo Cruz, FIOCRUZ, Fiocruz Rondônia e Universidade Federal de Rondônia, UNIR, Porto Velho, RO, Brazil; Centro Universitário São Lucas, UniSL, Porto Velho, RO, Brazil
| | - W L G Cavalcante
- Department of Pharmacology, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
| | - L B Vieira
- Department of Pharmacology, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
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8
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Terzioğlu Bebitoğlu B, Oğuz E, Gökçe A. Effect of valproic acid on oxidative stress parameters of glutamate-induced excitotoxicity in SH-SY5Y cells. Exp Ther Med 2020; 20:1321-1328. [PMID: 32742366 PMCID: PMC7388284 DOI: 10.3892/etm.2020.8802] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 01/30/2020] [Indexed: 12/11/2022] Open
Abstract
Glutamate-induced excitotoxicity has been reported to be involved in the pathophysiology of neurodegenerative disorders. It has been proposed that valproic acid (VPA), which is used in epileptic and bipolar disorders, may be protective against excitotoxic insult. The aim of the present study was to investigate the effects of VPA against the glutamate excitotoxicity in the SH-SY5Y human neuroblastoma cell line and determine its anti-oxidant capacity by measuring oxidative and anti-oxidant biochemical parameters. SH-SY5Y human neuroblastoma cells were pre-treated with 1, 5 or 10 mM VPA prior to exposure to 15 mM glutamate. The MTT assay was performed to determine cell viability. To detect oxidative insult in glutamate toxicity and the potential anti-oxidant effect of VPA, the cell catalase (CAT), superoxide dismutase (SOD), malondialdehyde and hydrogen peroxide (H2O2) activity was determined. A progressive decline in cell viability was observed with increasing glutamate concentrations (1-50 mM). Treatment with 1 mM VPA was revealed to be effective in increasing the viability of cells exposed to glutamate for 24 h. Oxidative damage, including an increase in H2O2 and MDA, was observed in SH-SY5Y cells treated with glutamate and was reduced by pre-treatment with VPA. CAT activity was decreased following glutamate exposure, but VPA did not prevent this decrease. SOD activity was increased by treatment with VPA alone and was not affected by glutamate exposure. Overall, the present results confirmed the critical role of oxidative stress in glutamate-induced excitotoxicity. They also suggested that VPA may exert an anti-oxidant effect against glutamate-induced excitotoxicity by decreasing oxidative parameters, including H2O2 and MDA, but only had a slight effect on CAT and SOD activity, which have an anti-oxidant capacity.
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Affiliation(s)
- Berna Terzioğlu Bebitoğlu
- Department of Medical Pharmacology, İstanbul Medeniyet University School of Medicine, İstanbul 34700, Turkey
| | - Elif Oğuz
- Department of Medical Pharmacology, İstanbul Medeniyet University School of Medicine, İstanbul 34700, Turkey
| | - Acet Gökçe
- Department of Medical Pharmacology, İstanbul Medeniyet University School of Medicine, İstanbul 34700, Turkey
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9
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Kayser S, Hansen JC, Staudt M, Moroz A, Larsen Y, Temperini P, Yi F, Syrenne JT, Krogsgaard-Larsen N, Iliadis S, Nielsen B, Hansen KB, Pickering DS, Bunch L. Stereoselective Synthesis of New (2 S,3 R)-3-Carboxyphenyl)pyrrolidine-2-carboxylic Acid Analogues Utilizing a C(sp 3)-H Activation Strategy and Structure-Activity Relationship Studies at the Ionotropic Glutamate Receptors. ACS Chem Neurosci 2020; 11:674-701. [PMID: 32065744 DOI: 10.1021/acschemneuro.0c00003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Competitive antagonists for ionotropic glutamate receptors (iGluRs) are highly valuable tool compounds for studying health and disease states in the central nervous system. However, only few subtype selective tool compounds are available and the discovery of antagonists with novel iGluR subtype selectivity profiles remains a profound challenge. In this paper, we report an elaborate structure-activity relationship (SAR) study of the parental scaffold 2,3-trans-3-carboxy-3-phenyl-proline by the synthesis of 40 new analogues. Three synthetic strategies were employed with two new strategies of which one being a highly efficient and fully enantioselective strategy based on C(sp3)-H activation methodology. The SAR study led to the conclusion that selectivity for the NMDA receptors was a general trend when adding substituents in the 5'-position. Selective NMDA receptor antagonists were obtained with high potency (IC50 values as low as 200 nM) and 3-34-fold preference for GluN1/GluN2A over GluN1/GluN2B-D NMDA receptors.
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Affiliation(s)
- Silke Kayser
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - Jacob C. Hansen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - Markus Staudt
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - Aleksandra Moroz
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - Younes Larsen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - Piero Temperini
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - Feng Yi
- Department of Biomedical and Pharmaceutical Sciences, Center for Structural and Functional Neuroscience, and Center for Biomolecular Structure and Dynamics, University of Montana, Missoula, Montana 59812, United States
| | - Jed T. Syrenne
- Department of Biomedical and Pharmaceutical Sciences, Center for Structural and Functional Neuroscience, and Center for Biomolecular Structure and Dynamics, University of Montana, Missoula, Montana 59812, United States
| | - Niels Krogsgaard-Larsen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - Stylianos Iliadis
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - Birgitte Nielsen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - Kasper B. Hansen
- Department of Biomedical and Pharmaceutical Sciences, Center for Structural and Functional Neuroscience, and Center for Biomolecular Structure and Dynamics, University of Montana, Missoula, Montana 59812, United States
| | - Darryl S. Pickering
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - Lennart Bunch
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
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10
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Nꭃ-nitro-l-arginine methyl model of pre-eclampsia elicits differential IBA1 and EAAT1 expressions in brain. J Chem Neuroanat 2019; 100:101660. [DOI: 10.1016/j.jchemneu.2019.101660] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/21/2019] [Accepted: 06/24/2019] [Indexed: 02/07/2023]
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Effect of pioglitazone and simvastatin in lipopolysaccharide-induced amyloidogenesis and cognitive impairment in mice: possible role of glutamatergic pathway and oxidative stress. Behav Pharmacol 2019; 30:5-15. [PMID: 29659380 DOI: 10.1097/fbp.0000000000000407] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Neuroinflammation and β-amyloid (Aβ) deposition in the brain are well known characteristics of neurodegeneration. Diabetes and hypercholesterolemia are the main risk factors leading to memory loss and cognitive impairment. Recently, it was found that statins and thiazolidinediones have promising anti-inflammatory and neuroprotective effects that could delay neurodegeneration and neuronal loss in diabetic and hypercholesterolemic patients. The aim of the present study was to investigate the protective effect of simvastatin, pioglitazone, and their combination in lipopolysaccharide (LPS)-induced neuroinflammation and amyloidogenesis. Mice were divided into five groups: group 1 received 0.9% saline, group 2 received LPS (0.8 mg/kg in saline), group 3 received LPS (0.8 mgl kg)+simvastatin (5 mg/kg in saline), group 4 received LPS (0.8 mg/kg)+pioglitazone (20 mg/kg in saline), group 5 receiving LPS (0.8 mg/kg)+simvastatin (5 mg/kg)+pioglitazone (20 mg/kg). Y-maze and novel object recognition were used to assess the spatial and nonspatial behavioral changes. Nitric oxide levels and glutamate levels were measured to elucidate the anti-glutamatergic and anti-inflammatory effects of the tested drugs. Immunohistochemistry was performed to detect the presence of Aβ1-42 in the mice brain. LPS impaired memory, and increased Aβ deposition, nitric oxide, and glutamate brain levels. Both drugs produced a significant improvement in all parameters. We conclude that simvastatin and pioglitazone may have a protective effect against cognitive impairment induced by LPS, through targeting the glutamatergic and inflammatory pathways, especially in patients having hypercholesterolemia and diabetes.
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Improving Outcome in Infantile Autism with Folate Receptor Autoimmunity and Nutritional Derangements: A Self-Controlled Trial. AUTISM RESEARCH AND TREATMENT 2019; 2019:7486431. [PMID: 31316831 PMCID: PMC6604479 DOI: 10.1155/2019/7486431] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 04/20/2019] [Accepted: 05/15/2019] [Indexed: 12/21/2022]
Abstract
Background In contrast to multiple rare monogenetic abnormalities, a common biomarker among children with infantile autism and their parents is the discovery of serum autoantibodies directed to the folate receptor alpha (FRα) localized at blood-brain and placental barriers, impairing physiologic folate transfer to the brain and fetus. Since outcome after behavioral intervention remains poor, a trial was designed to treat folate receptor alpha (FRα) autoimmunity combined with correction of deficient nutrients due to abnormal feeding habits. Methods All participants with nonsyndromic infantile autism underwent a routine protocol measuring CBC, iron, vitamins, coenzyme Q10, metals, and trace elements. Serum FRα autoantibodies were assessed in patients, their parents, and healthy controls. A self-controlled therapeutic trial treated nutritional derangements with addition of high-dose folinic acid if FRα autoantibodies tested positive. The Childhood Autism Rating Scale (CARS) monitored at baseline and following 2 years of treatment was compared to the CARS of untreated autistic children serving as a reference. Results In this self-controlled trial (82 children; mean age ± SD: 4.4 ± 2.3 years; male:female ratio: 4.8:1), FRα autoantibodies were found in 75.6 % of the children, 34.1 % of mothers, and 29.4 % of fathers versus 3.3 % in healthy controls. Compared to untreated patients with autism (n=84) whose CARS score remained unchanged, a 2-year treatment decreased the initial CARS score from severe (mean ± SD: 41.34 ± 6.47) to moderate or mild autism (mean ± SD: 34.35 ± 6.25; paired t-test p<0.0001), achieving complete recovery in 17/82 children (20.7 %). Prognosis became less favorable with the finding of higher FRα autoantibody titers, positive maternal FRα autoantibodies, or FRα antibodies in both parents. Conclusions Correction of nutritional deficiencies combined with high-dose folinic acid improved outcome for autism, although the trend of a poor prognosis due to maternal FRα antibodies or FRα antibodies in both parents may warrant folinic acid intervention before conception and during pregnancy.
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Yu L, Scherlag BS, Dormer K, Rutel I, Huang B, Zhou X, Kuriakose AE, Nguyen KK, Po S. Targeted Ganglionated Plexi Denervation Using Magnetic Nanoparticles Carrying Calcium Chloride Payload. JACC Clin Electrophysiol 2018; 4:1347-1358. [PMID: 30336881 DOI: 10.1016/j.jacep.2018.06.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 06/11/2018] [Accepted: 06/13/2018] [Indexed: 11/28/2022]
Abstract
OBJECTIVES This study sought to develop a novel targeted delivery therapy to ablate the major atrial ganglionated plexi (GP) using magnetic nanoparticles carrying a CaCl2 payload. BACKGROUND Prior studies indicated the role of hyperactivity of the cardiac autonomic nervous system in the genesis of atrial fibrillation. METHODS Twenty-eight male mongrel dogs underwent a bilateral thoracotomy. CaCl2-encapsulated magnetic nanoparticles (Ca-MNP) included magnetite in a sphere of biocompatible, biodegradable poly(lactic-co-glycolic acid). A custom external electromagnet focusing the magnetic field gradient (2,600 G) on the epicardial surface of the targeted GP was used to pull Ca-MNP into and release CaCl2 within the GP. The ventricular rate slowing response to high frequency stimulation (20 Hz, 0.1 ms) of the GP was used to assess the GP function. RESULTS The minimal effective concentration of CaCl2 to inhibit the GP function was 0.5 mmol/l. Three weeks after CaCl2 (0.5 mmol/l, n = 18 GP) or saline (n = 18 GP) microinjection into GP, the increased GP function, neural activity, and atrial fibrillation inducibility, as well as shortened effective refractory period in response to 6 h of rapid atrial pacing (1,200 beats/min) were suppressed by CaCl2 microinjection. After intracoronary infusion of Ca-MNP, the external electromagnet pulled Ca-MNP to the targeted GP and suppressed the GP function (n = 6 GP) within 15 min. CONCLUSIONS Ca-MNP can be magnetically targeted to suppress GP function by calcium-mediated neurotoxicity. This novel approach may be used to treat arrhythmias related to hyperactivity of the cardiac autonomic nervous system, such as early stage of atrial fibrillation, with minimal myocardial injury.
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Affiliation(s)
- Lilei Yu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China; Cardiovascular Research Institute, Wuhan University, Wuhan, China
| | - Benjamin S Scherlag
- Section of Cardiovascular Diseases and Heart Rhythm Institute, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Kenneth Dormer
- Integrative Physiology and Pharmacology Department, College of Osteopathic Medicine, Liberty University, Lynchburg, Virginia
| | - Isaac Rutel
- Department of Radiological Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Bing Huang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China; Cardiovascular Research Institute, Wuhan University, Wuhan, China
| | - Xiaoya Zhou
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China; Cardiovascular Research Institute, Wuhan University, Wuhan, China
| | - Aneetta E Kuriakose
- Department of Bioengineering, the University of Texas at Arlington, Arlington, Texas
| | - Kytai K Nguyen
- Department of Bioengineering, the University of Texas at Arlington, Arlington, Texas
| | - Sunny Po
- Section of Cardiovascular Diseases and Heart Rhythm Institute, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.
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Fouad IA, Sharaf NM, Abdelghany RM, El Sayed NSED. Neuromodulatory Effect of Thymoquinone in Attenuating Glutamate-Mediated Neurotoxicity Targeting the Amyloidogenic and Apoptotic Pathways. Front Neurol 2018; 9:236. [PMID: 29706929 PMCID: PMC5908889 DOI: 10.3389/fneur.2018.00236] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 03/26/2018] [Indexed: 11/13/2022] Open
Abstract
Overexposure of the glutamatergic N-methyl-d-aspartate (NMDA) receptor to the excitatory neurotransmitter l-glutamic acid leads to neuronal cell death by excitotoxicity as a result of increased intracellular Ca2+, mitochondrial dysfunction, and apoptosis. Moreover, it was previously reported that prolonged activation of the NMDA receptor increased beta-amyloid (Aβ) levels in the brain. Thymoquinone (TQ), the active constituent of Nigella sativa seeds, has been shown to have potent antioxidant and antiapoptotic effects. The aim of the present study was to explore the neuromodulatory effects of different doses of TQ (2.5 and 10 mg/kg) against apoptotic cell death and Aβ formation resulting from glutamate administration in rats using vitamin E as a positive control. Behavioral changes were assessed using Y-maze and Morris water maze tests for evaluating spatial memory and cognitive functions. Caspase-3, Lactate dehydrogenase, Aβ-42, and cytochrome c gene expression were determined. TQ-treated groups showed significant decreases in the levels of all tested biochemical and behavioral parameters compared with the glutamate-treated group. These findings demonstrated that TQ has a promising neuroprotective activity against glutamate-induced neurotoxicity and this effect is mediated through its anti-amyloidogenic, antioxidant, and antiapoptotic activities.
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Affiliation(s)
- Ibram Amin Fouad
- Department of Pharmacology and Toxicology, German University in Cairo, New Cairo, Egypt
| | - Nadia Mohamed Sharaf
- Department of Pharmacology and Toxicology, German University in Cairo, New Cairo, Egypt
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Soeiro-de-Souza MG, Otaduy MCG, Machado-Vieira R, Moreno RA, Nery FG, Leite C, Lafer B. Anterior Cingulate Cortex Glutamatergic Metabolites and Mood Stabilizers in Euthymic Bipolar I Disorder Patients: A Proton Magnetic Resonance Spectroscopy Study. BIOLOGICAL PSYCHIATRY: COGNITIVE NEUROSCIENCE AND NEUROIMAGING 2018; 3:985-991. [PMID: 29789269 DOI: 10.1016/j.bpsc.2018.02.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 02/28/2018] [Accepted: 02/28/2018] [Indexed: 02/04/2023]
Abstract
BACKGROUND Bipolar disorder is a chronic and recurrent illness characterized by depressive and manic episodes. Proton magnetic resonance spectroscopy (1H-MRS) studies have demonstrated glutamate (Glu) system abnormalities in BD, but it is unclear how Glu varies among mood states and how medications modulate it. The objective of this study was to investigate the influence of mood stabilizers on anterior cingulate cortex Glu levels using 1H-MRS during euthymia. METHODS One hundred twenty-eight bipolar I disorder (BDI) euthymic subjects and 80 healthy control subjects underwent 3T brain 1H-MRS imaging examination including acquisition of an anterior cingulate cortex single voxel (8 cm3) 1H-MRS, based on a point resolved spectroscopy (PRESS) sequence with an echo time of 80 ms and a repetition time of 1500 ms (BIPUSP MRS study). The Glu system was described by measuring Glu and the sum of Glu and glutamine (Glx) using creatine (Cre) as a reference. RESULTS Euthymic BDI subjects presented with higher ratios of Glu/Cre and Glx/Cre compared to healthy control subjects. Glu/Cre ratios were lower among patients using anticonvulsants, while Glx/Cre did not differ between the two groups. Lithium, antipsychotics, and antidepressants did not influence Glu/Cre or Glx/Cre. CONCLUSIONS We reported Glu/Cre and Glx abnormalities in the largest sample of euthymic BDI patients studied by 1H-MRS to date. Our data indicate that both Glu/Cre and Glx/Cre are elevated in BDI during euthymia regardless of medication effects, reinforcing the hypothesis of glutamatergic abnormalities in BD. Furthermore, we found an effect of anticonvulsants on Glu/Cre during euthymia, which might indicate a mechanism of mood stabilization in BD.
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Affiliation(s)
- Marcio Gerhardt Soeiro-de-Souza
- Mood Disorders Unit, Department and Institute of Psychiatry, University of São Paulo, São Paulo, Brazil; Genetics and Pharmacogenetics Unit, Department and Institute of Psychiatry, University of São Paulo, São Paulo, Brazil.
| | | | | | - Ricardo Alberto Moreno
- Mood Disorders Unit, Department and Institute of Psychiatry, University of São Paulo, São Paulo, Brazil
| | - Fabiano G Nery
- Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Claudia Leite
- Laboratory of Magnetic Resonance, Department and Institute of Radiology, University of São Paulo, São Paulo, Brazil
| | - Beny Lafer
- Bipolar Disorders Program, Department and Institute of Psychiatry, University of São Paulo, São Paulo, Brazil
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Gibson CL, Balbona JT, Niedzwiecki A, Rodriguez P, Nguyen KCQ, Hall DH, Blakely RD. Glial loss of the metallo β-lactamase domain containing protein, SWIP-10, induces age- and glutamate-signaling dependent, dopamine neuron degeneration. PLoS Genet 2018; 14:e1007269. [PMID: 29590100 PMCID: PMC5891035 DOI: 10.1371/journal.pgen.1007269] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 04/09/2018] [Accepted: 02/22/2018] [Indexed: 12/24/2022] Open
Abstract
Across phylogeny, glutamate (Glu) signaling plays a critical role in regulating neural excitability, thus supporting many complex behaviors. Perturbed synaptic and extrasynaptic Glu homeostasis in the human brain has been implicated in multiple neuropsychiatric and neurodegenerative disorders including Parkinson's disease, where theories suggest that excitotoxic insults may accelerate a naturally occurring process of dopamine (DA) neuron degeneration. In C. elegans, mutation of the glial expressed gene, swip-10, results in Glu-dependent DA neuron hyperexcitation that leads to elevated DA release, triggering DA signaling-dependent motor paralysis. Here, we demonstrate that swip-10 mutations induce premature and progressive DA neuron degeneration, with light and electron microscopy studies demonstrating the presence of dystrophic dendritic processes, as well as shrunken and/or missing cell soma. As with paralysis, DA neuron degeneration in swip-10 mutants is rescued by glial-specific, but not DA neuron-specific expression of wildtype swip-10, consistent with a cell non-autonomous mechanism. Genetic studies implicate the vesicular Glu transporter VGLU-3 and the cystine/Glu exchanger homolog AAT-1 as potential sources of Glu signaling supporting DA neuron degeneration. Degeneration can be significantly suppressed by mutations in the Ca2+ permeable Glu receptors, nmr-2 and glr-1, in genes that support intracellular Ca2+ signaling and Ca2+-dependent proteolysis, as well as genes involved in apoptotic cell death. Our studies suggest that Glu stimulation of nematode DA neurons in early larval stages, without the protective actions of SWIP-10, contributes to insults that ultimately drive DA neuron degeneration. The swip-10 model may provide an efficient platform for the identification of molecular mechanisms that enhance risk for Parkinson's disease and/or the identification of agents that can limit neurodegenerative disease progression.
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Affiliation(s)
- Chelsea L. Gibson
- Department of Pharmacology, Vanderbilt University, Nashville, TN, United States of America
- Department of Biomedical Science, Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton, FL, United States of America
| | - Joseph T. Balbona
- Department of Pharmacology, Vanderbilt University, Nashville, TN, United States of America
| | - Ashlin Niedzwiecki
- Department of Pharmacology, Vanderbilt University, Nashville, TN, United States of America
| | - Peter Rodriguez
- Department of Biomedical Science, Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton, FL, United States of America
| | - Ken C. Q. Nguyen
- Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, United States of America
| | - David H. Hall
- Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, United States of America
| | - Randy D. Blakely
- Department of Pharmacology, Vanderbilt University, Nashville, TN, United States of America
- Department of Biomedical Science, Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton, FL, United States of America
- Department of Psychiatry, Vanderbilt University, Nashville, TN, United States of America
- The Brain Institute, Florida Atlantic University, Jupiter, FL, United States of America
- * E-mail:
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Horak M, Holubova K, Nepovimova E, Krusek J, Kaniakova M, Korabecny J, Vyklicky L, Kuca K, Stuchlik A, Ricny J, Vales K, Soukup O. The pharmacology of tacrine at N-methyl-d-aspartate receptors. Prog Neuropsychopharmacol Biol Psychiatry 2017; 75:54-62. [PMID: 28089695 DOI: 10.1016/j.pnpbp.2017.01.003] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 12/15/2016] [Accepted: 01/09/2017] [Indexed: 12/22/2022]
Abstract
The mechanism of tacrine as a precognitive drug has been considered to be complex and not fully understood. It has been reported to involve a wide spectrum of targets involving cholinergic, gabaergic, nitrinergic and glutamatergic pathways. Here, we review the effect of tacrine and its derivatives on the NMDA receptors (NMDAR) with a focus on the mechanism of action and biological consequences related to the Alzheimer's disease treatment. Our findings indicate that effect of tacrine on glutamatergic neurons is both direct and indirect. Direct NMDAR antagonistic effect is often reported by in vitro studies; however, it is achieved by high tacrine concentrations which are not likely to occur under clinical conditions. The impact on memory and behavioral testing can be ascribed to indirect effects of tacrine caused by influencing the NMDAR-mediated currents via M1 receptor activation, which leads to inhibition of Ca2+-activated potassium channels. Such inhibition prevents membrane repolarization leading to prolonged NMDAR activation and subsequently to long term potentiation. Considering these findings, we can conclude that tacrine-derivatives with dual cholinesterase and NMDARs modulating activity may represent a promising approach in the drug development for diseases associated with cognitive dysfunction, such as the Alzheimer disease.
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Affiliation(s)
- Martin Horak
- Institute of Physiology, Academy of Sciences of the Czech Republic v.v.i., Videnska 1083, 14220 Prague 4, Czech Republic
| | - Kristina Holubova
- National Institute of Mental Health, Topolova 748, 250 67 Klecany, Czech Republic
| | - Eugenie Nepovimova
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
| | - Jan Krusek
- Institute of Physiology, Academy of Sciences of the Czech Republic v.v.i., Videnska 1083, 14220 Prague 4, Czech Republic
| | - Martina Kaniakova
- Institute of Physiology, Academy of Sciences of the Czech Republic v.v.i., Videnska 1083, 14220 Prague 4, Czech Republic
| | - Jan Korabecny
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
| | - Ladislav Vyklicky
- Institute of Physiology, Academy of Sciences of the Czech Republic v.v.i., Videnska 1083, 14220 Prague 4, Czech Republic
| | - Kamil Kuca
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
| | - Ales Stuchlik
- Institute of Physiology, Academy of Sciences of the Czech Republic v.v.i., Videnska 1083, 14220 Prague 4, Czech Republic
| | - Jan Ricny
- National Institute of Mental Health, Topolova 748, 250 67 Klecany, Czech Republic
| | - Karel Vales
- National Institute of Mental Health, Topolova 748, 250 67 Klecany, Czech Republic
| | - Ondrej Soukup
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic.
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N-Adamantyl-4-Methylthiazol-2-Amine Attenuates Glutamate-Induced Oxidative Stress and Inflammation in the Brain. Neurotox Res 2017; 32:107-120. [PMID: 28285348 DOI: 10.1007/s12640-017-9717-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 02/25/2017] [Accepted: 02/28/2017] [Indexed: 12/15/2022]
Abstract
In this study, we explored the possible mechanisms underlying the neuroprotective and anti-oxidative effects of N-adamantyl-4-methylthiazol-2-amine (KHG26693) against in vivo glutamate-induced toxicity in the rat cerebral cortex. Our results showed that pretreatment with KHG26693 significantly attenuated glutamate-induced elevation of lipid peroxidation, tumor necrosis factor-α, interferon gamma, IFN-γ, interleukin-1β, nitric oxide, reactive oxygen species, NADPH oxidase, caspase-3, calpain activity, and Bax. Furthermore, KHG26693 pretreatment attenuated key antioxidant parameters such as levels of superoxide dismutase, catalase, glutathione, and glutathione reductase. KHG26693 also attenuated the protein levels of inducible nitric oxide synthase, neuronal nitric oxide synthase, nuclear factor erythroid 2-related factor 2, heme oxygenase-1, and glutamate cysteine ligase catalytic subunit caused by glutamate toxicity. Finally, KHG26693 mitigated glutamate-induced changes in mitochondrial ATP level and cytochrome oxidase c. Thus, KHG26693 functions as neuroprotective and anti-oxidative agent against glutamate-induced toxicity through its antioxidant and anti-inflammatory activities in rat brain at least in part.
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19
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Li J, Gao W, Gao J, Li H, Zhang X, Qin X, Li Z. Metabolomics reveal the protective effect of Farfarae Flos against asthma using an OVA-induced rat model. RSC Adv 2017. [DOI: 10.1039/c7ra05340a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A 1H NMR based metabolomics approach combined with biochemical assay and histopathological inspection has been employed to study the protective effect of PEFF against asthma on a rat model.
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Affiliation(s)
- Jing Li
- Modern Research Center for Traditional Chinese Medicine of Shanxi University
- Taiyuan 030006
- People's Republic of China
- College of Chemistry and Chemical Engineering of Shanxi University
- Taiyuan 030006
| | - Wei Gao
- Department of Otolaryngology
- Head & Neck Surgery
- The First Hospital Affiliated with Shanxi Medical University
- People's Republic of China
| | - Jining Gao
- Shanxi Hospital of Integrated Traditional and Western Medicine
- Taiyuan 030000
- People's Republic of China
| | - Hong Li
- Shanxi Hospital of Integrated Traditional and Western Medicine
- Taiyuan 030000
- People's Republic of China
| | - Xiang Zhang
- The Center for Regulatory Environmental Analytical Metabolomics
- University of Louisville
- USA
| | - Xuemei Qin
- Modern Research Center for Traditional Chinese Medicine of Shanxi University
- Taiyuan 030006
- People's Republic of China
| | - Zhenyu Li
- Modern Research Center for Traditional Chinese Medicine of Shanxi University
- Taiyuan 030006
- People's Republic of China
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Amir A, Oenzil F. Alteration Expression of Bax, Bcl-2 and VDAC1 Genes in Oligozoospermic and Fertile Subjects. Pak J Biol Sci 2016; 19:71-76. [PMID: 29023042 DOI: 10.3923/pjbs.2016.71.76] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
One of factors causing oligozoospermic circumstances is excessive apoptosis during spermatogenesis. Spermatogenesis known involves Bcl-2 family proteins in cytoplasm and Voltage Dependent Anion Channel 1 (VDAC1) in outer mitochondrial membrane to facilitate releasing of apoptosis factor such as cytochrome-c from inter-membrane space into cytoplasm. The study was aimed to analyze the mRNA expression of pro-apoptotic Bax, anti-apoptotic Bcl-2 and VDAC1 genes derived from 45 oligozoospermic subjects and 20 fertile subjects as control. Analysis of transcript expression was performed by two-steps real-time (PCR) and calculating by standard curve method. Stages of works were followed: Analysis of sperm basal characterization, isolation of spermatozoa to separate it from cement and resulted pellets. Pellets were saturated with PBS to obtain mRNA and reversed into cDNA. The cDNA were sequenced to investigate SNP of Bax, Bcl-2 and VDAC1 genes. Results showed that comparison of log mRNA copy number of Bax, Bcl-2 and VDAC1 genes for oligospemic and fertile subjects varied. The Bax, Bcl-2 and VDAC1 were significantly different between oligozoospermic and normozoospermic subjects (p = 0.000, p = 0.041, p = 0.000, respectively). It was suggested that oligozoospermia may be occurred by inducing the increase of Bax pro-apoptotic and VDAC1 genes expression and decreasing of Bcl-2 expression to lead the excessive of apoptosis.
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Affiliation(s)
- Arni Amir
- Department of Biology, Faculty of Medicine, Padang Andalas University, Indonesia
| | - Fadil Oenzil
- Department of Biochemistry, Faculty of Medicine, Padang Andalas University, Indonesia
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21
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Gao Y, Xu X, Chang S, Wang Y, Xu Y, Ran S, Huang Z, Li P, Li J, Zhang L, Saavedra JM, Liao H, Pang T. Totarol prevents neuronal injury in vitro and ameliorates brain ischemic stroke: Potential roles of Akt activation and HO-1 induction. Toxicol Appl Pharmacol 2015; 289:142-54. [PMID: 26440581 DOI: 10.1016/j.taap.2015.10.001] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 09/22/2015] [Accepted: 10/02/2015] [Indexed: 11/24/2022]
Abstract
The natural product totarol, a phenolic diterpenoid and a major constituent isolated from the sap of Podocarpus totara, has been reported to have a potent antimicrobial activity. In this study, we determined whether totarol possessed an additional neuroprotective activity in vitro and in vivo. We found that totarol prevented glutamate- and oxygen and glucose deprivation-induced neuronal death in primary rat cerebellar granule neuronal cells and cerebral cortical neurons. Totarol increased Akt and GSK-3β phosphorylation, Nrf2 and heme oxygenase-1 (HO-1) protein expressions and suppressed oxidative stress by increasing GSH and SOD activities. The PI3K/Akt inhibitor LY294002 prevented totarol neuroprotective effect by suppressing the totarol-induced changes in HO-1 expression and the activities of GSH and SOD. The HO-1 inhibitor ZnPPIX also prevented totarol-increased GSH and SOD activities. In a model of acute cerebral ischemic injury in Sprague-Dawley rats, produced by occlusion of the middle cerebral artery for 2h followed by 22 h or 46 h of reperfusion, totarol significantly reduced infarct volume and improved the neurological deficit. In this model, totarol increased HO-1 expression and the activities of GSH and SOD. These observations suggest that totarol may be a novel activator of the Akt/HO-1 pathway protecting against ischemic stroke through reduction of oxidative stress.
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Affiliation(s)
- Yuanxue Gao
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Xiaojun Xu
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Sai Chang
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Yunjie Wang
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Yazhou Xu
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Siqi Ran
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Zhangjian Huang
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, China Pharmaceutical University, Nanjing 210009, PR China
| | - Ping Li
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Jia Li
- National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 189 Guo Shoujing Road, Shanghai 201203, PR China
| | - Luyong Zhang
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Juan M Saavedra
- Department of Pharmacology and Physiology, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Hong Liao
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China.
| | - Tao Pang
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China; Department of Pharmacology and Physiology, Georgetown University Medical Center, Washington, DC 20057, USA.
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22
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Guida F, Luongo L, Marmo F, Romano R, Iannotta M, Napolitano F, Belardo C, Marabese I, D'Aniello A, De Gregorio D, Rossi F, Piscitelli F, Lattanzi R, de Bartolomeis A, Usiello A, Di Marzo V, de Novellis V, Maione S. Palmitoylethanolamide reduces pain-related behaviors and restores glutamatergic synapses homeostasis in the medial prefrontal cortex of neuropathic mice. Mol Brain 2015; 8:47. [PMID: 26260027 PMCID: PMC4532244 DOI: 10.1186/s13041-015-0139-5] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 08/02/2015] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Enhanced supraspinal glutamate levels following nerve injury are associated with pathophysiological mechanisms responsible for neuropathic pain. Chronic pain can interfere with specific brain areas involved in glutamate-dependent neuropsychological processes, such as cognition, memory, and decision-making. The medial prefrontal cortex (mPFC) is thought to play a critical role in pain-related depression and anxiety, which are frequent co-morbidities of chronic pain. Using an animal model of spared nerve injury (SNI) of the sciatic nerve, we assess bio-molecular modifications in glutamatergic synapses in the mPFC that underlie neuropathic pain-induced plastic changes at 30 days post-surgery. Moreover, we examine the effects of palmitoylethanolamide (PEA) administration on pain-related behaviours, as well as the cortical biochemical and morphological changes that occur in SNI animals. RESULTS At 1 month, SNI was associated with mechanical and thermal hypersensitivity, as well as depression-like behaviour, cognitive impairments, and obsessive-compulsive activities. Moreover, we observed an overall glutamate synapse modification in the mPFC, characterized by changes in synaptic density proteins and amino acid levels. Finally, with regard to the resolution of pain and depressive-like syndrome in SNI mice, PEA restored the glutamatergic synapse proteins and changes in amino acid release. CONCLUSIONS Given the potential role of the mPFC in pain mechanisms, our findings may provide novel insights into neuropathic pain forebrain processes and indicate PEA as a new pharmacological tool to treat neuropathic pain and the related negative affective states. Graphical Abstract Palmitoylethanolamide: a new pharmacological tool to treat neuropathic pain and the related negative affective states.
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Affiliation(s)
- F Guida
- Department of Experimental Medicine, Section of Pharmacology L. Donatelli, Second University of Naples, 80138, Naples, Italy
| | - L Luongo
- Department of Experimental Medicine, Section of Pharmacology L. Donatelli, Second University of Naples, 80138, Naples, Italy
| | - F Marmo
- Department of Neuroscience, Laboratory of Molecular and Translational Psychiatry, University School of Medicine "Federico II", Naples, Italy
| | - R Romano
- Department of Experimental Medicine, Section of Pharmacology L. Donatelli, Second University of Naples, 80138, Naples, Italy
| | - M Iannotta
- Department of Experimental Medicine, Section of Pharmacology L. Donatelli, Second University of Naples, 80138, Naples, Italy
| | - F Napolitano
- Behavioural Neuroscience Laboratory, CEINGE - Biotecnologie Avanzate, Via Comunale Margherita 482, 80145, Naples, Italy
| | - C Belardo
- Department of Experimental Medicine, Section of Pharmacology L. Donatelli, Second University of Naples, 80138, Naples, Italy
| | - I Marabese
- Department of Experimental Medicine, Section of Pharmacology L. Donatelli, Second University of Naples, 80138, Naples, Italy
| | - A D'Aniello
- Stazione Zoologica "Anton Dohrn", Naples, Italy
| | - D De Gregorio
- Department of Experimental Medicine, Section of Pharmacology L. Donatelli, Second University of Naples, 80138, Naples, Italy
| | - F Rossi
- Department of Women, Child and General and Specialistic Surgery, Second University of Naples, Naples, Italy
| | - F Piscitelli
- Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, 80078, Pozzuoli, NA, Italy
| | - R Lattanzi
- Department of Physiology and Pharmacology, Sapienza University of Rome, 00185, Rome, Italy
| | - A de Bartolomeis
- Department of Neuroscience, Laboratory of Molecular and Translational Psychiatry, University School of Medicine "Federico II", Naples, Italy
| | - A Usiello
- Behavioural Neuroscience Laboratory, CEINGE - Biotecnologie Avanzate, Via Comunale Margherita 482, 80145, Naples, Italy
| | - V Di Marzo
- Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, 80078, Pozzuoli, NA, Italy
| | - V de Novellis
- Department of Experimental Medicine, Section of Pharmacology L. Donatelli, Second University of Naples, 80138, Naples, Italy
| | - S Maione
- Department of Experimental Medicine, Section of Pharmacology L. Donatelli, Second University of Naples, 80138, Naples, Italy.
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23
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Krogsgaard-Larsen N, Storgaard M, Møller C, Demmer CS, Hansen J, Han L, Monrad RN, Nielsen B, Tapken D, Pickering DS, Kastrup JS, Frydenvang K, Bunch L. Structure–Activity Relationship Study of Ionotropic Glutamate Receptor Antagonist (2S,3R)-3-(3-Carboxyphenyl)pyrrolidine-2-carboxylic Acid. J Med Chem 2015. [DOI: 10.1021/acs.jmedchem.5b00750] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Niels Krogsgaard-Larsen
- Chemical Neuroscience Group, ‡Biostructural Research
Group, §Medicinal
Chemistry Group, ∥Molecular, Cellular Pharmacology Group, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - Morten Storgaard
- Chemical Neuroscience Group, ‡Biostructural Research
Group, §Medicinal
Chemistry Group, ∥Molecular, Cellular Pharmacology Group, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - Charlotte Møller
- Chemical Neuroscience Group, ‡Biostructural Research
Group, §Medicinal
Chemistry Group, ∥Molecular, Cellular Pharmacology Group, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - Charles S. Demmer
- Chemical Neuroscience Group, ‡Biostructural Research
Group, §Medicinal
Chemistry Group, ∥Molecular, Cellular Pharmacology Group, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - Jeanette Hansen
- Chemical Neuroscience Group, ‡Biostructural Research
Group, §Medicinal
Chemistry Group, ∥Molecular, Cellular Pharmacology Group, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - Liwei Han
- Chemical Neuroscience Group, ‡Biostructural Research
Group, §Medicinal
Chemistry Group, ∥Molecular, Cellular Pharmacology Group, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - Rune N. Monrad
- Chemical Neuroscience Group, ‡Biostructural Research
Group, §Medicinal
Chemistry Group, ∥Molecular, Cellular Pharmacology Group, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - Birgitte Nielsen
- Chemical Neuroscience Group, ‡Biostructural Research
Group, §Medicinal
Chemistry Group, ∥Molecular, Cellular Pharmacology Group, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - Daniel Tapken
- Chemical Neuroscience Group, ‡Biostructural Research
Group, §Medicinal
Chemistry Group, ∥Molecular, Cellular Pharmacology Group, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - Darryl S. Pickering
- Chemical Neuroscience Group, ‡Biostructural Research
Group, §Medicinal
Chemistry Group, ∥Molecular, Cellular Pharmacology Group, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - Jette S. Kastrup
- Chemical Neuroscience Group, ‡Biostructural Research
Group, §Medicinal
Chemistry Group, ∥Molecular, Cellular Pharmacology Group, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - Karla Frydenvang
- Chemical Neuroscience Group, ‡Biostructural Research
Group, §Medicinal
Chemistry Group, ∥Molecular, Cellular Pharmacology Group, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - Lennart Bunch
- Chemical Neuroscience Group, ‡Biostructural Research
Group, §Medicinal
Chemistry Group, ∥Molecular, Cellular Pharmacology Group, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
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24
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Naringin Abrogates Cisplatin-Induced Cognitive Deficits and Cholinergic Dysfunction Through the Down-Regulation of AChE Expression and iNOS Signaling Pathways in Hippocampus of Aged Rats. J Mol Neurosci 2015; 56:349-62. [DOI: 10.1007/s12031-015-0547-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 03/16/2015] [Indexed: 01/25/2023]
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25
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Zhang SN, Li XZ, wang Y, zhang N, Yang ZM, Liu SM, Lu F. Neuroprotection or neurotoxicity? new insights into the effects of Acanthopanax senticosus harms on nervous system through cerebral metabolomics analysis. JOURNAL OF ETHNOPHARMACOLOGY 2014; 156:290-300. [PMID: 25223591 DOI: 10.1016/j.jep.2014.08.037] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 08/30/2014] [Accepted: 08/31/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Acanthopanax senticosus harms (AS), also called "Ciwujia" in Chinese and "Siberian ginseng" in the Siberian Taiga region, is the herb used in traditional medicinal systems in China and Russia, which has been applied to the treatment of various nervous and cerebrovascular diseases, such as depression, mental fatigue, and transient global cerebral ischemia. The previous research works usually tended to focus on the neuroprotective effects of AS, but ignored its additional effects that are not entirely beneficial to the nervous system. Therefore, to discover the potential intervention targets of AS and evaluate their roles in the nervous system are the urgent problems. MATERIALS AND METHODS Ultra-performance liquid chromatography-quadrupole time-of-flight-mass spectrometry (UPLC-QTOF-MS) coupled with pattern recognition methods were integrated to investigate the metabolic profiles of AS-treated rats. The analysis of possible pathways influenced by AS was performed by ingenuity pathway analysis (IPA) with MetPA. RESULTS Treated with AS, 16 modulated metabolites were identified and considered as the potential intervention targets of AS, out of which 3 metabolites had protective effects on the nervous system, whereas 7 metabolites showed the neurotoxicity. CONCLUSION These results may reveal that the effects of AS on nervous system had two sides, and it could not only exert the neuroprotection but also produce some potential neurotoxicity.
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Affiliation(s)
- Shuai-nan Zhang
- Chinese Medicine Toxicological Laboratory, Institute of Traditional Chinese Medicine, Heilongjiang University of Chinese Medicine, He Ping Road 24, Harbin 150040, PR China
| | - Xu-zhao Li
- Chinese Medicine Toxicological Laboratory, Institute of Traditional Chinese Medicine, Heilongjiang University of Chinese Medicine, He Ping Road 24, Harbin 150040, PR China
| | - Yu wang
- Chinese Medicine Toxicological Laboratory, Institute of Traditional Chinese Medicine, Heilongjiang University of Chinese Medicine, He Ping Road 24, Harbin 150040, PR China
| | - Na zhang
- Chinese Medicine Toxicological Laboratory, Institute of Traditional Chinese Medicine, Heilongjiang University of Chinese Medicine, He Ping Road 24, Harbin 150040, PR China
| | - Zhi-ming Yang
- Chinese Medicine Toxicological Laboratory, Institute of Traditional Chinese Medicine, Heilongjiang University of Chinese Medicine, He Ping Road 24, Harbin 150040, PR China
| | - Shu-min Liu
- Chinese Medicine Toxicological Laboratory, Institute of Traditional Chinese Medicine, Heilongjiang University of Chinese Medicine, He Ping Road 24, Harbin 150040, PR China; Drug Safety Evaluation Center, Heilongjiang University of Chinese Medicine, He Ping Road 24, Harbin 150040, PR China.
| | - Fang Lu
- Chinese Medicine Toxicological Laboratory, Institute of Traditional Chinese Medicine, Heilongjiang University of Chinese Medicine, He Ping Road 24, Harbin 150040, PR China.
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26
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Ultrafine carbon black induces glutamate and ATP release by activating connexin and pannexin hemichannels in cultured astrocytes. Toxicology 2014; 323:32-41. [PMID: 24932759 DOI: 10.1016/j.tox.2014.06.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 05/21/2014] [Accepted: 06/11/2014] [Indexed: 12/22/2022]
Abstract
Ultrafine particles could enter central nervous system and were associated with brain damage. The underlying mechanisms have not been fully elucidated. Glutamate and ATP are important signaling molecules in brain physiology and pathology. We investigated whether ultrafine carbon black (ufCB) could regulate the release of glutamate and ATP from cultured cortical astrocytes and the involvement of hemichannels in the release mechanism. Our results showed that ufCB dose-dependently increased glutamate and ATP release and activated hemichannels in astrocytes. ufCB-activated hemichannels were attributed to the activation of both connexin 43 (Cx43) and pannexin1 (Panx1) hemichannels, which was based on the finding of increased protein expression and distribution on cell surface of Cx43 and Panx1, and the inhibiting effects of hemichannel inhibitor carbenoxolone, Cx43 hemichannel inhibitor (43)Gap27 and Panx1 hemichannel inhibitor (10)Panx1 on hemichannel activation. Furthermore, ufCB-induced glutamate and ATP release were dependent on Cx43 and Panx1 hemichannels, because carbenoxolone and (43)Gap27 inhibited ufCB-induced glutamate and ATP release, and (10)Panx1 inhibited ufCB-induced ATP release. Taken together, we demonstrated, for the first time, that ufCB could induce glutamate and ATP release by activating Cx43 and Panx1 hemchannels in astrocytes. Our findings suggest a novel mechanism for neurotoxicity caused by ultrafine particles.
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27
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MSTMP, a Stilbene Derivative, Protects SH-SY5Y Cells Against Oxidative Stress. Can J Neurol Sci 2014; 41:382-8. [PMID: 24718825 DOI: 10.1017/s0317167100017340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE the protective effects of a novel stilbene derivative, (e)-2-(3,4,5- trimethoxystyryl)-3,5,6-trimethylpyrazine (MStMp), on hydrogen peroxide (h2o2)-induced human derived neuroblastoma cell (Sh-Sy5y) damage and its molecular mechanisms were investigated. METHODS Sh-Sy5y cells were exposed to 200 μmol.l-1 h2o2 for 12 h. the effect of MStMp on cell viability and apoptosis was assessed by 3-(4,5-dimethyl- thiazol-2-yl)-2,5-diphenyl tetrazolium bromide (Mtt) assay and flow cytometry method. the activities of lactate dehydrogenase (ldh), superoxide dismutase (Sod) and nitric oxide synthetase (noS) and the content of malondialdehyde (Mda), reduced glutathione (gSh) and nitric oxide (no) in cells were determined by commercial kits. the expressions of pro-apoptotic factor caspase-3, caspase-9 and inducible noS (inoS) were detected by Western blotting. intracellular formation of reactive oxygen species (roS) was assessed using 6-carboxy-2’,7’-dichlorofluorescin diacetate (dCfh-da) fluorescent probe. RESULTS MStMp increased the Sh-Sy5y cell viability by inhibition of cell apoptosis induced by h2o2. these effects were accompanied by an increase of Sod activity, gSh level, and a decrease of Mda content. Moreover, MStMp showed stronger effects on inhibition of ldh leakage, apoptotic cells, intracellular roS level and the expression of caspase-3 and caspase-9 than tMp. furthermore, MStMp induced a decrease of no level and the activity of inoS, tnoS in a time-dependent manner. CONCLUSIONS MStMp prevents h2o2-induced cell injury through anti-oxidation and anti-apoptosis via roS-no pathway.
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28
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Chua B, Goldberg I. Neuroprotective agents in glaucoma therapy: recent developments and future directions. EXPERT REVIEW OF OPHTHALMOLOGY 2014. [DOI: 10.1586/eop.10.55] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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29
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Azevedo MI, Pereira AF, Nogueira RB, Rolim FE, Brito GAC, Wong DVT, Lima-Júnior RCP, de Albuquerque Ribeiro R, Vale ML. The antioxidant effects of the flavonoids rutin and quercetin inhibit oxaliplatin-induced chronic painful peripheral neuropathy. Mol Pain 2013; 9:53. [PMID: 24152430 PMCID: PMC3835704 DOI: 10.1186/1744-8069-9-53] [Citation(s) in RCA: 157] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 10/17/2013] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Oxaliplatin, the third-generation platinum compound, has evolved as one of the most important therapeutic agents in colorectal cancer chemotherapy. The main limiting factor in oxaliplatin treatment is painful neuropathy that is difficult to treat. This side effect has been studied for several years, but its full mechanism is still inconclusive, and effective treatment does not exist. Data suggest that oxaliplatin's initial neurotoxic effect is peripheral and oxidative stress-dependent. A spinal target is also suggested in its mechanism of action. The flavonoids rutin and quercetin have been described as cell-protecting agents because of their antioxidant, antinociceptive, and anti-inflammatory actions. We proposed a preventive effect of these agents on oxaliplatin-induced painful peripheral neuropathy based on their antioxidant properties. METHODS Oxaliplatin (1 mg/kg, i.v.) was injected in male Swiss mice, twice a week (total of nine injections). The development of sensory alterations, such as thermal and mechanical allodynia, was evaluated using the tail immersion test in cold water (10°C) and the von Frey test. Rutin and quercetin (25-100 mg/kg, i.p.) were injected 30 min before each oxaliplatin injection. The animals' spinal cords were removed for histopathological and immunohistochemical evaluation and malondialdehyde assay. RESULTS Oxaliplatin significantly increased thermal and mechanical nociceptive response, effects prevented by quercetin and rutin at all doses. Fos immunostaining in the dorsal horn of the spinal cord confirmed these results. The oxidative stress assays mainly showed that oxaliplatin induced peroxidation in the spinal cord and that rutin and quercetin decreased this effect. The flavonoids also decreased inducible nitric oxide synthase and nitrotyrosine immunostaining in the dorsal horn of the spinal cord. These results suggest that nitric oxide and peroxynitrite are also involved in the neurotoxic effect of oxaliplatin and that rutin and quercetin can inhibit their effect in the spinal cord. We also observed the preservation of dorsal horn structure using histopathological analyses. CONCLUSIONS Oxaliplatin induced painful peripheral neuropathy in mice, an effect that was prevented by rutin and quercetin. The mechanism of action of oxaliplatin appears to be, at least, partially oxidative stress-induced damage in dorsal horn neurons, with the involvement of lipid peroxidation and protein nitrosylation.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Mariana Lima Vale
- Medical Sciences Post-Graduation, Department of Clinical Medicine, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil.
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30
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Kim EA, Choi J, Han AR, Choi SY, Hahn HG, Cho SW. Anti-oxidative and anti-inflammatory effects of 2-cyclopropylimino-3-methyl-1,3-thiazoline hydrochloride on glutamate-induced neurotoxicity in rat brain. Neurotoxicology 2013; 38:106-14. [DOI: 10.1016/j.neuro.2013.07.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 07/04/2013] [Accepted: 07/05/2013] [Indexed: 01/13/2023]
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31
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Caspase-3 is Involved in IFN-γ- and TNF-α-Mediated MIN6 Cells Apoptosis via NF-κB/Bcl-2 Pathway. Cell Biochem Biophys 2013; 67:1239-48. [DOI: 10.1007/s12013-013-9642-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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32
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Pyrroloquinoline quinine protects rat brain cortex against acute glutamate-induced neurotoxicity. Neurochem Res 2013; 38:1661-71. [PMID: 23686346 DOI: 10.1007/s11064-013-1068-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 04/28/2013] [Accepted: 05/03/2013] [Indexed: 12/27/2022]
Abstract
To investigate possible protective effects of pyrroloquinoline quinone (PQQ) on the rat cortex with glutamate injection and to understand the mechanisms linking the in vivo neuroprotection of PQQ. Adult Sprague-Dawley rats received glutamate injection into the rat cortex. Terminal deoxynucleotidyl transferase biotin-dUTP nick end labeling assay was performed to observe influences of co-treatment with PQQ (simultaneous injection with PQQ and glutamate) on neural cell apoptosis in the rat cortex. The production of reactive oxygen species (ROS) in the rat cortex was detected by flow cytometry using 2',7'-dichlorofluorescin diacetate labeling, and the activity of superoxide dismutase, glutathione and malondialdehyde was respectively determined. Real time quantitative RT-PCR and Western blot were applied to measure the mRNA and protein expressions of Nrf1, Nrf2, HO-1 and GCLC in the rat cortex. Western blot was used to detect the phosphorylation of Akt and GSK3β in the rat cortex. Co-treatment with PQQ protected neural cells in the rat cortex from glutamate-induced apoptosis. PQQ decreased the ROS production induced by glutamate injection. PQQ increased the mRNA and protein expressions of Nrf2, HO-1 and GCLC and the phosphorylation of Akt and GSK3β in the cortex of glutamate-injected rats. PQQ could produce neuroprotective effects on the rat cortex. The antioxidant properties of PQQ and PQQ-induced activation of Akt/GSK3β signal pathway might be responsible for the in vivo neuroprotection of PQQ.
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Zhou L, Huang J, Wang H, Luo J, Zeng L, Xiong K, Chen D. Expression of Glutamate and GABA during the Process of Rat Retinal Synaptic Plasticity Induced by Acute High Intraocular Pressure. Acta Histochem Cytochem 2013; 46:11-8. [PMID: 23554535 PMCID: PMC3596602 DOI: 10.1267/ahc.12029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Accepted: 11/12/2012] [Indexed: 11/30/2022] Open
Abstract
Acute high intraocular pressure (HIOP) can induce plastic changes of retinal synapses during which the expression of the presynaptic marker synaptophysin (SYN) has a distinct spatiotemporal pattern from the inner plexiform layer to the outer plexiform layer. We identified the types of neurotransmitters in the retina that participated in this process and determined the response of these neurotransmitters to HIOP induction. The model of acute HIOP was established by injecting normal saline into the anterior chamber of the rat eye. We found that the number of glutamate-positive cells increased successively from the inner part to the outer part of the retina (from the ganglion cell layer to the inner nuclear layer to the outer nuclear layer) after HIOP, which was similar to the spatiotemporal pattern of SYN expression (internally to externally) following HIOP. However, the distribution and intensity of GABA immunoreactivity in the retina did not change significantly at different survival time post injury and had no direct correlation with SYN expression. Our results suggested that the excitatory neurotransmitter glutamate might participate in the plastic process of retinal synapses following acute HIOP, but no evidence was found for the role of the inhibitory neurotransmitter GABA.
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Affiliation(s)
- Lihong Zhou
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University
| | - Jufang Huang
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University
| | - Hui Wang
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University
| | - Jia Luo
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University
| | - Leping Zeng
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University
| | - Kun Xiong
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University
| | - Dan Chen
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University
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Quan Y, Jiang J, Dingledine R. EP2 receptor signaling pathways regulate classical activation of microglia. J Biol Chem 2013; 288:9293-302. [PMID: 23404506 DOI: 10.1074/jbc.m113.455816] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Activation of EP2 receptors by prostaglandin E2 (PGE2) promotes brain inflammation in neurodegenerative diseases, but the pathways responsible are unclear. EP2 receptors couple to Gαs and increase cAMP, which associates with protein kinase A (PKA) and cAMP-regulated guanine nucleotide exchange factors (Epacs). Here, we studied EP2 function and its signaling pathways in rat microglia in their resting state or undergoing classical activation in vitro following treatment with low concentrations of lipopolysaccharide and interferon-γ. Real time PCR showed that PGE2 had no effect on expression of CXCL10, TGF-β1, and IL-11 and exacerbated the rapid up-regulation of mRNAs encoding cyclooxygenase-2, inducible NOS, IL-6, and IL-1β but blunted the production of mRNAs encoding TNF-α, IL-10, CCL3, and CCL4. These effects were mimicked fully by the EP2 agonist butaprost but only weakly by the EP1/EP3 agonist 17-phenyl trinor PGE2 or the EP4 agonist CAY10598 and not at all by the EP3/EP1 agonist sulprostone and confirmed by protein measurements of cyclooxygenase-2, IL-6, IL-10, and TNF-α. In resting microglia, butaprost induced cAMP formation and altered the mRNA expression of inflammatory mediators, but protein expression was unchanged. The PKA inhibitor H89 had little or no effect on inflammatory mediators modulated by EP2, whereas the Epac activator 8-(4-chlorophenylthio)-2'-O-methyladenosine 3',5'-cyclic monophosphate acetoxymethyl ester mimicked all butaprost effects. These results indicate that EP2 activation plays a complex immune regulatory role during classical activation of microglia and that Epac pathways are prominent in this role.
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Affiliation(s)
- Yi Quan
- Department of Pharmacology, Emory University, Atlanta, GA 30322, USA
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35
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Bcl-2 rs956572 polymorphism is associated with increased anterior cingulate cortical glutamate in euthymic bipolar I disorder. Neuropsychopharmacology 2013; 38:468-75. [PMID: 23072837 PMCID: PMC3547197 DOI: 10.1038/npp.2012.203] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
B-cell lymphoma 2 (Bcl-2) is an important regulator of cellular plasticity and resilience. In bipolar disorder (BD), studies have shown a key role for a Bcl-2 gene single-nucleotide polymorphism (SNP) rs956572 in the regulation of intracellular calcium (Ca(2+)) dynamics, Bcl-2 expression/levels, and vulnerability to cellular apoptosis. At the same time, Bcl-2 decreases glutamate (Glu) toxicity in neural cells. Abnormalities in Glu function have been implicated in BD. In magnetic resonance spectroscopy (MRS) studies, anterior cingulated cortex (ACC) Glu levels have been reported to be increased in bipolar depression and mania, but no study specifically evaluated ACC Glu levels in BD-euthymia. Here, we compared ACC Glu levels in BD-euthymia compared with healthy subjects using (1)H-MRS and also evaluated the selective role of the rs956572 Bcl-2 SNP in modulating ACC Glu and Glx (sum of Glu and glutamine) in euthymic-BD. Forty euthymic subjects with BD type I and forty healthy controls aged 18-40 were evaluated. All participants were genotyped for Bcl-2 rs956572 and underwent a 3-Tesla brain magnetic resonance imaging examination including the acquisition of an in vivo PRESS single voxel (2 cm(3)) (1)H-MRS sequence to obtain metabolite levels from the ACC. Euthymic-BD subjects had higher Glu/Cre (creatine) and Glx/Cre compared with healthy controls. The Bcl-2 SNP AA genotype was associated with elevated ACC Glu/Cre and Glx/Cre ratio in the BD group but not in controls. The present study reports for the first time an increase in ACC Glu/Cre and Glx/Cre ratios in BD-euthymia. Also, Bcl-2 AA genotype, previously associated with lower Bcl-2 expression and increase intracellular Ca(2+), showed to be associated with increased ACC Glu and Glx levels in euthymic-BD subjects. The present findings reinforce a key role for glutamatergic system dysfunction in the pathophysiology of BD, potentially involving modulatory effects by Bcl-2 in the ACC.
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36
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Takaki J, Fujimori K, Miura M, Suzuki T, Sekino Y, Sato K. L-glutamate released from activated microglia downregulates astrocytic L-glutamate transporter expression in neuroinflammation: the 'collusion' hypothesis for increased extracellular L-glutamate concentration in neuroinflammation. J Neuroinflammation 2012; 9:275. [PMID: 23259598 PMCID: PMC3575281 DOI: 10.1186/1742-2094-9-275] [Citation(s) in RCA: 129] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Accepted: 12/01/2012] [Indexed: 01/08/2023] Open
Abstract
Background In the central nervous system, astrocytic L-glutamate (L-Glu) transporters maintain extracellular L-Glu below neurotoxic levels, but their function is impaired with neuroinflammation. Microglia become activated with inflammation; however, the correlation between activated microglia and the impairment of L-Glu transporters is unknown. Methods We used a mixed culture composed of astrocytes, microglia, and neurons. To quantify L-Glu transporter function, we measured the extracellular L-Glu that remained 30 min after an application of L-Glu to the medium (the starting concentration was 100 μM). We determined the optimal conditions of lipopolysaccharide (LPS) treatment to establish an inflammation model without cell death. We examined the predominant subtypes of L-Glu transporters and the changes in the expression levels of these transporters in this inflammation model. We then investigated the role of activated microglia in the changes in L-Glu transporter expression and the underlying mechanisms in this inflammation model. Results Because LPS (10 ng/mL, 72 h) caused a significant increase in the levels of L-Glu remaining but did not affect cell viability, we adopted this condition for our inflammation model without cell death. GLAST was the predominant L-Glu transporter subtype, and its expression decreased in this inflammation model. As a result of their release of L-Glu, activated microglia were shown to be essential for the significant decrease in L-Glu uptake. The serial application of L-Glu caused a significant decrease in L-Glu uptake and GLAST expression in the astrocyte culture. The hemichannel inhibitor carbenoxolone (CBX) inhibited L-Glu release from activated microglia and ameliorated the decrease in GLAST expression in the inflammation model. In addition, the elevation of the astrocytic intracellular L-Glu itself caused the downregulation of GLAST. Conclusions Our findings suggest that activated microglia trigger the elevation of extracellular L-Glu through their own release of L-Glu, and astrocyte L-Glu transporters are downregulated as a result of the elevation of astrocytic intracellular L-Glu levels, causing a further increase of extracellular L-Glu. Our data suggest the new hypothesis that activated microglia collude with astrocytes to cause the elevation of extracellular L-Glu in the early stages of neuroinflammation.
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Affiliation(s)
- Junpei Takaki
- Laboratory of Neuropharmacology, Division of Pharmacology, National Institute of Health Sciences, 1-18-1 Kamiyoga, Tokyo 158-8501, Japan
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Uzar E, Ozay R, Evliyaoglu O, Aktas A, Ulkay MB, Uyar ME, Ersoy A, Burakgazi AZ, Turkay C, Ilhan A. Hydroxycloroquine-induced oxidative stress on sciatic nerve and muscle tissue of rats. Hum Exp Toxicol 2012; 31:1066-73. [DOI: 10.1177/0960327111433183] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- E Uzar
- Department of Neurology, School of Medicine, Dicle University, Diyarbakır, Turkey
| | - R Ozay
- Department of Neurosurgery, Etlik Ihtisas Research and Educational Hospital, Ankara, Turkey
| | - O Evliyaoglu
- Department of Biochemistry, School of Medicine, Dicle University, Diyarbakır, Turkey
| | - A Aktas
- Faculty of Veterinary Medicine, Department of Histology and Embryology, Istanbul University, Istanbul, Turkey
| | - MB Ulkay
- Faculty of Veterinary Medicine, Department of Histology and Embryology, Istanbul University, Istanbul, Turkey
| | - ME Uyar
- Department of Internal Medicine, School of Medicine, Fatih University, Ankara, Turkey
| | - A Ersoy
- Department of Neurology, School of Medicine, Fatih University, Ankara, Turkey
| | - AZ Burakgazi
- Neuroscience Section, Virginia Tech Carilion School of Medicine, Roanoke, USA
| | - C Turkay
- Department of Internal Medicine, School of Medicine, Fatih University, Ankara, Turkey
| | - A Ilhan
- Department of Neurology, School of Medicine, Fatih University, Ankara, Turkey
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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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Sato K, Kuriwaki JI, Takahashi K, Saito Y, Oka JI, Otani Y, Sha Y, Nakazawa K, Sekino Y, Ohwada T. Discovery of a Tamoxifen-related compound that suppresses glial l-glutamate transport activity without interaction with estrogen receptors. ACS Chem Neurosci 2012; 3:105-13. [PMID: 22860180 DOI: 10.1021/cn200091w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Accepted: 11/14/2011] [Indexed: 11/28/2022] Open
Abstract
We recently found that tamoxifen suppresses l-glutamate transport activity of cultured astrocytes. Here, in an attempt to separate the l-glutamate transporter-inhibitory activity from the estrogen receptor-mediated genomic effects, we synthesized several compounds structurally related to tamoxifen. Among them, we identified two compounds, 1 (YAK01) and 3 (YAK037), which potently inhibited l-glutamate transporter activity. The inhibitory effect of 1 was found to be mediated through estrogen receptors and the mitogen-activated protein kinase (MAPK)/phosphatidylinositol 3-kinase (PI3K) pathway, though 1 showed greatly reduced transactivation activity compared with that of 17β-estradiol. On the other hand, compound 3 exerted its inhibitory effect through an estrogen receptor-independent and MAPK-independent, but PI3K-dependent pathway, and showed no transactivation activity. Compound 3 may represent a new platform for developing novel l-glutamate transporter inhibitors with higher brain transfer rates and reduced adverse effects.
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Affiliation(s)
- Kaoru Sato
- Laboratory of Neuropharmacology, Division of Pharmacology, National Institute of Health Sciences, 1-18-1 Kamiyoga,
Setagaya-ku, Tokyo 158-8501, Japan
| | - Jun-ichi Kuriwaki
- Laboratory of Neuropharmacology, Division of Pharmacology, National Institute of Health Sciences, 1-18-1 Kamiyoga,
Setagaya-ku, Tokyo 158-8501, Japan
| | - Kanako Takahashi
- Laboratory of Neuropharmacology, Division of Pharmacology, National Institute of Health Sciences, 1-18-1 Kamiyoga,
Setagaya-ku, Tokyo 158-8501, Japan
| | - Yoshihiko Saito
- Laboratory of Pharmacology, Faculty
of Pharmaceutical Sciences, Tokyo University of Science, 2541 Yamazaki, Noda-city, Chiba 278-8510, Japan
| | - Jun-ichiro Oka
- Laboratory of Pharmacology, Faculty
of Pharmaceutical Sciences, Tokyo University of Science, 2541 Yamazaki, Noda-city, Chiba 278-8510, Japan
| | - Yuko Otani
- Laboratory of Organic and Medicinal
Chemistry, Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
| | - Yu Sha
- Laboratory of Organic and Medicinal
Chemistry, Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
| | - Ken Nakazawa
- Laboratory of Neuropharmacology, Division of Pharmacology, National Institute of Health Sciences, 1-18-1 Kamiyoga,
Setagaya-ku, Tokyo 158-8501, Japan
| | - Yuko Sekino
- Laboratory of Neuropharmacology, Division of Pharmacology, National Institute of Health Sciences, 1-18-1 Kamiyoga,
Setagaya-ku, Tokyo 158-8501, Japan
| | - Tomohiko Ohwada
- Laboratory of Organic and Medicinal
Chemistry, Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
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Chtourou Y, Fetoui H, Garoui EM, Boudawara T, Zeghal N. Improvement of cerebellum redox states and cholinergic functions contribute to the beneficial effects of silymarin against manganese-induced neurotoxicity. Neurochem Res 2011; 37:469-79. [PMID: 22033861 DOI: 10.1007/s11064-011-0632-x] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 08/03/2011] [Accepted: 10/05/2011] [Indexed: 12/17/2022]
Abstract
Manganese (Mn) is a potent neurotoxin involved in the initiation and progression of various cognitive disorders. Oxidative stress is reported as one of accepted mechanisms of Mn toxicity. The present study was designed to explore the effects of silymarin, a natural antioxidant, in attenuating the toxicity induced by Mn in rat cerebellum. In this investigation, rats were treated orally with MnCl₂ (20 mg/ml) for 30 days, subsets of these animals were treated intraperitoneally daily with silymarin (100 mg/kg) along with respective controls. Mn exposure caused a marked oxidative stress in cerebellum as indicated by a significant decrease in the activities of enzymatic antioxidants like superoxide dismutase, catalase and glutathione peroxidase and in the levels of non-enzymatic antioxidants like reduced glutathione (GSH), total thiols and vitamin C. Conversely an increase was obtained in lipid and protein markers such as thiobarbituric reactive acid substances, lipid hydroperoxide and protein carbonyl products contents. A significant increase in acetylcholinesterase and a decrease in Na⁺/K⁺-ATPase activities were also shown, with a substantial rise in the expression of acetylcholinesterase and inducible nitric oxide synthase (iNOS), and nitric oxide levels. The potential effect of SIL to prevent Mn induced neurotoxicity was also reflected by histopathological observations. Rats exposed to Mn showed a reduced number and morphological alterations of cerebellar Purkinje cells. These phenomenons were completely reversed by SIL co-treatment. We concluded that silymarin may protect against Mn-induced oxidative stress in cerebellum by inhibiting both lipid and protein oxidation and by activating acetylcholinesterase and inducible nitric oxide synthase (iNOS) gene expression.
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Affiliation(s)
- Yassine Chtourou
- Animal Physiology Laboratory, Life Sciences Department, UR/08-73, Sfax Faculty of Sciences, University of Sfax, BP1171, 3000 Sfax, Tunisia
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Evaluation of the antioxidant, anti-inflammatory and hepatoprotective properties of vanillin in carbon tetrachloride-treated rats. Eur J Pharmacol 2011; 668:133-9. [PMID: 21777577 DOI: 10.1016/j.ejphar.2011.07.001] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 06/24/2011] [Accepted: 07/01/2011] [Indexed: 11/23/2022]
Abstract
The antioxidant and anti-inflammatory effects of vanillin are considered as important forces in the protection against liver injury and fibrosis. This study investigated the protective effects of vanillin against carbon tetrachoride (CCl(4))-induced hepatotoxicity in rat. Pretreatment with vanillin prior the administration of CCl(4) significantly prevented the decrease of protein synthesis and the increase in plasma alanine (ALT) and aspartate (AST) aminotransferases. Furthermore, it inhibited hepatic lipid peroxidation (MDA) and protein carbonyl (PCO) formation and attenuated the (CCl(4))-mediated depletion of antioxidant enzyme catalase and superoxide dismutase (SOD) activities and glutathione level (GSH) in the liver. In addition, vanillin markedly attenuated the expression levels of pro-inflammatory cytokines such as tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) and interleukin-6 (IL-6) and prevented CCl(4)-induced hepatic cell alteration and necrosis, as indicated by liver histopathology. These findings suggest that the antioxidant and anti-inflammatory effects of vanillin against CCl(4)-induced acute liver injury may involve its ability to block CCl(4)-generated free radicals.
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Chu SH, Lim JW, Kim DG, Lee ES, Kim KH, Kim H. Down-regulation of Bcl-2 is mediated by NF-κB activation in Helicobacter pylori-induced apoptosis of gastric epithelial cells. Scand J Gastroenterol 2011; 46:148-55. [PMID: 20969490 DOI: 10.3109/00365521.2010.525255] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE Bcl-2 family is involved in the regulation of apoptosis. NF-κB activation is associated with either the expression of Bcl-2 or down-regulation of Bcl-2 depending on cell types and stimuli. Previously, we showed NF-κB activation, decrease in the level of Bcl-2, and apoptosis in Helicobacter pylori (H. pylori)-infected gastric epithelial cells. The present study aims to investigate the relation of Bcl-2 expression and NF-κB activation in H. pylori-induced apoptotic cell death of AGS (gastric adenocarcinoma) cells. MATERIAL AND METHODS AGS cells were transfected with mutant IκBα to suppress NF-κB activation or Bcl-2 gene to induce overexpression of Bcl-2. mRNA expression of Bcl-2, p53 and Bax, DNA fragmentation, cell viability, and the numbers of apoptotic cells were determined. RESULTS H. pylori induced decrease in Bcl-2, but increase in p53 and Bax at the levels of mRNA and protein in AGS cells. H. pylori-induced increment of apoptotic cells and decrease in Bcl-2 level were inhibited in the cells transfected with mutant IκBα gene as compared with the cells transfected with control vector. H. pylori-induced apoptosis determined by apoptotic cells, DNA fragmentation, and cell viability was inhibited in the cells transfected with Bcl-2 gene. CONCLUSION Down-regulation of Bcl-2 is mediated by NF-κB activation, which may be the underlying mechanism of apoptosis in H. pylori-infected gastric epithelial cells.
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Affiliation(s)
- Sang Hui Chu
- Nursing Policy and Research Institute, Biobehavioral Research Center, Yonsei University College of Nursing, Seoul, Korea
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Yoon SW, Kang S, Ryu SE, Poo H. Identification of tyrosine-nitrated proteins in HT22 hippocampal cells during glutamate-induced oxidative stress. Cell Prolif 2010; 43:584-93. [PMID: 21039997 DOI: 10.1111/j.1365-2184.2010.00708.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVES Nitration of tyrosine residues in protein is a post-translational modification, which occurs under oxidative stress, and is associated with several neurodegenerative diseases. To understand the role of nitrated proteins in oxidative stress-induced cell death, we identified nitrated proteins and checked correlation of their nitration in glutamate-induced HT22 cell death. MATERIALS AND METHODS Nitrated proteins were detected by western blotting using an anti-nitrotyrosine antibody, extracted from matching reference 2-dimensional electrophoresis gels, and identified with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. RESULTS Glutamate treatment induced apoptosis in HT22 cells, while reactive oxygen species (ROS) inhibitor or neuronal nitric oxide synthase (nNOS) inhibitor blocked glutamate-induced HT22 cell death. Nitration levels of 13 proteins were increased after glutamate stimulation; six of them were involved in regulation of energy production and two were related to apoptosis. The other nitrated proteins were associated with calcium signal modulation, ER dysfunction, or were of unknown function. CONCLUSIONS The 13 tyrosine-nitrated proteins were detected in these glutamate-treated HT22 cells. Results demonstrated that cell death, ROS accumulation and nNOS expression were related to nitration of protein tyrosine in the glutamate-stimulated cells.
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Affiliation(s)
- S-W Yoon
- Viral Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejon, Korea
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