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Zhang J, Gong L, Zhu H, Sun W, Tian J, Zhang Y, Liu Q, Li X, Zhang F, Wang S, Zhu S, Ding D, Zhang W, Yang C. RICH2 decreases the mitochondrial number and affects mitochondrial localization in diffuse low-grade glioma-related epilepsy. Neurobiol Dis 2023; 188:106344. [PMID: 37926169 DOI: 10.1016/j.nbd.2023.106344] [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: 07/14/2023] [Revised: 10/26/2023] [Accepted: 11/01/2023] [Indexed: 11/07/2023] Open
Abstract
Epilepsy, a common complication of diffuse low-grade gliomas (DLGGs; diffuse oligodendroglioma and astrocytoma collectively), severely compromises the quality of life of patients. DLGG epileptogenicity may primarily be generated by interactions between the tumor and the neocortex. Neuronal uptake of dysfunctional mitochondria from the extracellular environment can lead to abnormal neuronal discharge. Mitochondrial dysfunction is frequently observed in gliomas that can transmigrate across the plasma membranes. Here, we examined the role of the Rho GTPase-activating protein 44 (RICH2) in mitochondrial dynamics and DLGG-related epilepsy. We investigated the association between mitochondrial and RICH2 expression in human DLGG tissues using immunohistochemistry. We examined the association between RICH2 and epilepsy in nude mouse glioma models by electrophysiology. The effect of RICH2 on mitochondrial morphology and calcium motility were assessed by single cell fluorescence microscopy. Quantitative RT-PCR (qRT-PCR) and Western blot analysis were performed to characterize RICH2 induced expression changes in the genes related to mitochondrial dynamics, mitogenesis and mitochondrial function. We found that RICH2 expression was higher in oligodendroglioma than in astrocytoma and was correlated with better prognosis and higher epilepsy rate in patients. The expression of mitochondria may be associated with clinical DLGG-related epilepsy and reduced by RICH2 overexpression. And RICH2 could promote DLGG-related epilepsy in tumorigenic nude mice. RICH2 overexpression decreased calcium flow and the mitochondria released from glioma cells (SW1088 and U251) into the extracellular environment, potentially via downregulation of MFN-1/MFN-2 levels which suggests reduced mitochondrial fusion. In addition, we observed decreased mitochondrial trafficking into neurons (released from glioma cells and trafficked into neurons), which could explain the higher incidence of DLGG-related epilepsy due to reduced neuroprotection. Furthermore, RICH2 downregulated MAPK/ERK/HIF-1 pathway. In conclusion, these results suggest that RICH2 could promote epilepsy by (i) inhibiting mitochondrial fusion via MFN downregulation and Drp-1 upregulation; (ii) altering the MAPK/ERK/Hif-1 signaling axis. RICH2 may be a potential target in the treatment of DLGG-related epilepsy.
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Affiliation(s)
- Jiarui Zhang
- Department of Pathology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China; Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Li Gong
- Department of Pathology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Huayu Zhu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Wei Sun
- Institute for Biomedical Sciences of Pain, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Jing Tian
- Department of Pathology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Yan Zhang
- Department of Pathology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Qiao Liu
- Department of Pathology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Xiaolan Li
- Department of Pathology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Fuqin Zhang
- Department of Pathology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Shumei Wang
- Department of Pathology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Shaojun Zhu
- Department of Pathology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Dongjing Ding
- Department of Pathology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Wei Zhang
- Department of Pathology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China.
| | - Chen Yang
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China.
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Ning B, Hang S, Zhang W, Mao C, Li D. An update on the bridging factors connecting autophagy and Nrf2 antioxidant pathway. Front Cell Dev Biol 2023; 11:1232241. [PMID: 37621776 PMCID: PMC10445655 DOI: 10.3389/fcell.2023.1232241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 07/24/2023] [Indexed: 08/26/2023] Open
Abstract
Macroautophagy/autophagy is a lysosome-dependent catabolic pathway for the degradation of intracellular proteins and organelles. Autophagy dysfunction is related to many diseases, including lysosomal storage diseases, cancer, neurodegenerative diseases, cardiomyopathy, and chronic metabolic diseases, in which increased reactive oxygen species (ROS) levels are also observed. ROS can randomly oxidize proteins, lipids, and DNA, causing oxidative stress and damage. Cells have developed various antioxidant pathways to reduce excessive ROS and maintain redox homeostasis. Treatment targeting only one aspect of diseases with autophagy dysfunction and oxidative stress shows very limited effects. Herein, identifying the bridging factors that can regulate both autophagy and antioxidant pathways is beneficial for dual-target therapies. This review intends to provide insights into the current identified bridging factors that connect autophagy and Nrf2 antioxidant pathway, as well as their tight interconnection with each other. These factors could be potential dual-purpose targets for the treatment of diseases implicated in both autophagy dysfunction and oxidative stress.
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Affiliation(s)
- Baike Ning
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
| | - Shuqi Hang
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
| | - Wenhe Zhang
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
| | - Caiwen Mao
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
| | - Dan Li
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI, United States
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Evaluation of the Antioxidant Activity of Levetiracetam in a Temporal Lobe Epilepsy Model. Biomedicines 2023; 11:biomedicines11030848. [PMID: 36979827 PMCID: PMC10045287 DOI: 10.3390/biomedicines11030848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 02/27/2023] [Accepted: 02/28/2023] [Indexed: 03/14/2023] Open
Abstract
Epilepsy is a neurological disorder in which it has been shown that the presence of oxidative stress (OS) is implicated in epileptogenesis. The literature has shown that some antiseizure drugs (ASD) have neuroprotective properties. Levetiracetam (LEV) is a drug commonly used as an ASD, and in some studies, it has been found to possess antioxidant properties. Because the antioxidant effects of LEV have not been demonstrated in the chronic phase of epilepsy, the objective of this study was to evaluate, for the first time, the effects of LEV on the oxidant–antioxidant status in the hippocampus of rats with temporal lobe epilepsy (TLE). The in vitro scavenging capacity of LEV was evaluated. LEV administration in rats with TLE significantly increased superoxide dismutase (SOD) activity, increased catalase (CAT) activity, but did not change glutathione peroxidase (GPx) activity, and significantly decreased glutathione reductase (GR) activity in comparison with epileptic rats. LEV administration in rats with TLE significantly reduced hydrogen peroxide (H2O2) levels but did not change lipoperoxidation and carbonylated protein levels in comparison with epileptic rats. In addition, LEV showed in vitro scavenging activity against hydroxyl radical (HO•). LEV showed significant antioxidant effects in relation to restoring the redox balance in the hippocampus of rats with TLE. In vitro, LEV demonstrated direct antioxidant activity against HO•.
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Zavala-Tecuapetla C, Luna-Munguia H, López-Meraz ML, Cuellar-Herrera M. Advances and Challenges of Cannabidiol as an Anti-Seizure Strategy: Preclinical Evidence. Int J Mol Sci 2022; 23:ijms232416181. [PMID: 36555823 PMCID: PMC9783044 DOI: 10.3390/ijms232416181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 11/24/2022] [Accepted: 12/16/2022] [Indexed: 12/23/2022] Open
Abstract
The use of Cannabis for medicinal purposes has been documented since ancient times, where one of its principal cannabinoids extracted from Cannabis sativa, cannabidiol (CBD), has emerged over the last few years as a promising molecule with anti-seizure potential. Here, we present an overview of recent literature pointing out CBD's pharmacological profile (solubility, metabolism, drug-drug interactions, etc.,), CBD's interactions with multiple molecular targets as well as advances in preclinical research concerning its anti-seizure effect on both acute seizure models and chronic models of epilepsy. We also highlight the recent attention that has been given to other natural cannabinoids and to synthetic derivatives of CBD as possible compounds with therapeutic anti-seizure potential. All the scientific research reviewed here encourages to continue to investigate the probable therapeutic efficacy of CBD and its related compounds not only in epilepsy but also and specially in drug-resistant epilepsy, since there is a dire need for new and effective drugs to treat this disease.
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Affiliation(s)
- Cecilia Zavala-Tecuapetla
- Laboratory of Physiology of Reticular Formation, National Institute of Neurology and Neurosurgery, Insurgentes Sur 3877, La Fama, Mexico City 14269, Mexico
- Correspondence:
| | - Hiram Luna-Munguia
- Departamento de Neurobiologia Conductual y Cognitiva, Instituto de Neurobiologia, Universidad Nacional Autonoma de Mexico, Campus UNAM-Juriquilla, Queretaro 76230, Mexico
| | - María-Leonor López-Meraz
- Instituto de Investigaciones Cerebrales, Universidad Veracruzana, Luis Castelazo Ayala s/n, Col. Industrial Ánimas, Xalapa 91190, Mexico
| | - Manola Cuellar-Herrera
- Epilepsy Clinic, Hospital General de México Dr. Eduardo Liceaga, Dr. Balmis 148, Doctores, Mexico City 06720, Mexico
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Li JJ, Meng XY, Men ZN, Chen X, Shen T, Liu JS. Electric and reactive oxygen species dual-responsive polymeric micelles improve the therapeutic efficacy of lamotrigine in pentylenetetrazole kindling rats. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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You J, Huang H, Chan CTY, Li L. Pathological Targets for Treating Temporal Lobe Epilepsy: Discoveries From Microscale to Macroscale. Front Neurol 2022; 12:779558. [PMID: 35069411 PMCID: PMC8777077 DOI: 10.3389/fneur.2021.779558] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Accepted: 11/30/2021] [Indexed: 12/15/2022] Open
Abstract
Temporal lobe epilepsy (TLE) is one of the most common and severe types of epilepsy, characterized by intractable, recurrent, and pharmacoresistant seizures. Histopathology of TLE is mostly investigated through observing hippocampal sclerosis (HS) in adults, which provides a robust means to analyze the related histopathological lesions. However, most pathological processes underlying the formation of these lesions remain elusive, as they are difficult to detect and observe. In recent years, significant efforts have been put in elucidating the pathophysiological pathways contributing to TLE epileptogenesis. In this review, we aimed to address the new and unrecognized neuropathological discoveries within the last 5 years, focusing on gene expression (miRNA and DNA methylation), neuronal peptides (neuropeptide Y), cellular metabolism (mitochondria and ion transport), cellular structure (microtubule and extracellular matrix), and tissue-level abnormalities (enlarged amygdala). Herein, we describe a range of biochemical mechanisms and their implication for epileptogenesis. Furthermore, we discuss their potential role as a target for TLE prevention and treatment. This review article summarizes the latest neuropathological discoveries at the molecular, cellular, and tissue levels involving both animal and patient studies, aiming to explore epileptogenesis and highlight new potential targets in the diagnosis and treatment of TLE.
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Affiliation(s)
- Jing You
- Department of Biomedical Engineering, University of North Texas, Denton, TX, United States
| | - Haiyan Huang
- Department of Nutrition and Food Science, Texas Women University, Denton, TX, United States
| | - Clement T Y Chan
- Department of Biomedical Engineering, University of North Texas, Denton, TX, United States
| | - Lin Li
- Department of Biomedical Engineering, University of North Texas, Denton, TX, United States.,Department of Neurology, University of California, Los Angeles, Los Angeles, CA, United States
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Inhibition of miR-134-5p protects against kainic acid-induced excitotoxicity through Sirt3-mediated preservation of mitochondrial function. Epilepsy Res 2021; 176:106722. [PMID: 34273723 DOI: 10.1016/j.eplepsyres.2021.106722] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 07/07/2021] [Accepted: 07/09/2021] [Indexed: 12/31/2022]
Abstract
Epilepsy is a neurological disorder which is characterized by brain hyper-excitability and manifests as seizure. Due to its complicated pathogenesis, treatment for epilepsy still remains a huge challenge for neurology in the whole world. MciroRNA-134 (miR-134) is one kind of miRNAs which was firstly found abundant in synapses. In this study, we tried to unveil the role of inhibiting MciroRNA-134-5p (miR-134-5p) in excitotoxicity induced by kainic acid (KA) in the hippocampal neurons (HT22) cells. The results showed that treatment of KA increased the expression of miR-134-5p significantly and caused marked neuron excitotoxicity, evidenced by risen cell death rate, higher LDH release and aggravated cell viability. After suppressing miR-134-5p expression via transfecting HT22 cells with miR-134-5p antisense (Anti-134), cell viability was promoted obviously, along with decreased LDH release and cell death rate. In addition, KA-induced lipid peroxidation, cytochrome c release and mitochondrial ROS generation were also attenuated by Anti-134. The level of Sirtuin 3 (Sirt3) and its downstream antioxidant enzymes, such as mitochondrial superoxide dismutase 2 (SOD2), isocitrate dehydrogenase 2 (IDH2) and glutathione peroxidase (GSH-Px), were significantly higher in Anti-134 group compared with the control and scramble group. After inhibiting Sirt3 expression with SiRNA targeting Sirt3 (Si-Sirt3) and 3-(1H-1,2,3-triazol-4-yl) pyridine (3-TYP), the positive role of Anti-134 was apparently reversed. In conclusion, this research highly suggests that inhibition of miR-134-5p could protect neurons from KA-induced excitotoxicity through Sirt3-mediated preservation of mitochondrial function.
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Luo Q, Xian P, Wang T, Wu S, Sun T, Wang W, Wang B, Yang H, Yang Y, Wang H, Liu W, Long Q. Antioxidant activity of mesenchymal stem cell-derived extracellular vesicles restores hippocampal neurons following seizure damage. Am J Cancer Res 2021; 11:5986-6005. [PMID: 33897894 PMCID: PMC8058724 DOI: 10.7150/thno.58632] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 03/15/2021] [Indexed: 12/24/2022] Open
Abstract
Oxidative stress is a critical event in neuronal damage following seizures. Mesenchymal stem cell-derived extracellular vesicles (MSC-EVs) have been shown to be promising nanotherapeutic agents in neurological disorders. However, the mechanism underlying MSC-EVs therapeutic efficacy for oxidative stress-induced neuronal damage remains poorly understood. Methods: We investigated the antioxidant and restoration activities of MSC-EVs on hippocampal neurons in response to H2O2 stimulation in vitro and seizures in vivo. We also explored the potential underlying mechanism by injecting adeno-associated virus (AAV)-nuclear factor erythroid-derived 2, like 2 (Nrf2), a key antioxidant mediator, in animal models. Results: MSC-EVs were enriched in antioxidant miRNAs and exhibited remarkable antioxidant activity evident by increased ferric ion-reducing antioxidant ability, catalase, superoxide dismutase, and glutathione peroxidase activities and decreased reactive oxygen species (ROS) generation, DNA/lipid/protein oxidation, and stress-associated molecular patterns in cultured cells and mouse models. Notably, EV administration exerted restorative effects on the hippocampal neuronal structure and associated functional impairments, including dendritic spine alterations, electrophysiological disturbances, calcium transients, mitochondrial changes, and cognitive decline after oxidative stress in vitro or in vivo. Mechanistically, we found that the Nrf2 signaling pathway was involved in the restorative effect of EV therapy against oxidative neuronal damage, while AAV-Nrf2 injection attenuated the antioxidant activity of MSC-EVs on the seizure-induced hippocampal injury. Conclusions: We have shown that MSC-EVs facilitate the reconstruction of hippocampal neurons associated with the Nrf2 defense system in response to oxidative insults. Our study highlights the clinical value of EV-therapy in neurological disorders such as seizures.
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Platanić Arizanović L, Nikolić-Kokić A, Brkljačić J, Tatalović N, Miler M, Oreščanin-Dušić Z, Vidonja Uzelac T, Nikolić M, Milošević V, Blagojević D, Spasić S, Miljević Č. Effects of several atypical antipsychotics closapine, sertindole or ziprasidone on hepatic antioxidant enzymes: Possible role in drug-induced liver dysfunction. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2021; 84:173-182. [PMID: 33234086 DOI: 10.1080/15287394.2020.1844827] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Chronic use of atypical antipsychotics may produce hepatic damage. Atypical antipsychotics, including clozapine, sertindole, and ziprasidone, are extensively metabolized by the liver and this process generates toxic-free radical metabolic intermediates which may contribute to liver damage. The aim of this study was to investigate whether clozapine, sertindole, or ziprasidone affected hepatic antioxidant defense enzymes which consequently led to disturbed redox homeostasis. The expression and activity of antioxidant enzymes superoxide dismutase (SOD), glutathione peroxidase (GPx), glutathione reductase (GR), catalase (CAT), and glutathione-S-transferases (GST) were measured in rat livers at doses corresponding to human antipsychotic therapy. Clozapine increased activity of SOD types 1 and 2, GR and GST, but reduced CAT activity. Sertindole elevated activities of both SODs. In ziprasidone-treated rats only decreased CAT activity was found. All three antipsychotics produced mild-to-moderate hepatic histopathological changes categorized as regenerative alterations. No apparent signs of immune cell infiltration, microvesicular or macrovesicular fatty change, or hepatocytes in mitosis were observed. In conclusion, a 4-week long daily treatment with clozapine, sertindole, or ziprasidone altered hepatic antioxidant enzyme activities and induced histopathological changes in liver. The most severe alterations were noted in clozapine-treated rats. Data indicate that redox disturbances may contribute to liver dysfunction after long-term atypical antipsychotic drug treatment.
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Affiliation(s)
| | - Aleksandra Nikolić-Kokić
- Department of Physiology, Institute for Biological Research "Siniša Stanković", National Institute of Republic of Serbia, University of Belgrade , Belgrade, Serbia
| | - Jelena Brkljačić
- Department of Biochemistry, Institute for Biological Research "Siniša Stanković", National Institute of Republic of Serbia, University of Belgrade , Belgrade, Serbia
| | - Nikola Tatalović
- Department of Physiology, Institute for Biological Research "Siniša Stanković", National Institute of Republic of Serbia, University of Belgrade , Belgrade, Serbia
| | - Marko Miler
- Department of Cytology, Institute for Biological Research "Siniša Stanković", National Institute of Republic of Serbia, University of Belgrade , Belgrade, Serbia
| | - Zorana Oreščanin-Dušić
- Department of Physiology, Institute for Biological Research "Siniša Stanković", National Institute of Republic of Serbia, University of Belgrade , Belgrade, Serbia
| | - Teodora Vidonja Uzelac
- Department of Physiology, Institute for Biological Research "Siniša Stanković", National Institute of Republic of Serbia, University of Belgrade , Belgrade, Serbia
| | - Milan Nikolić
- Department of Biochemistry, Faculty of Chemistry, University of Belgrade , Belgrade, Serbia
| | - Verica Milošević
- Department of Cytology, Institute for Biological Research "Siniša Stanković", National Institute of Republic of Serbia, University of Belgrade , Belgrade, Serbia
| | - Duško Blagojević
- Department of Biochemistry, Faculty of Chemistry, University of Belgrade , Belgrade, Serbia
| | - Snežana Spasić
- Department of Chemistry, Institute of Chemistry, Technology and Metallurgy - National Institute of Republic of Serbia, University of Belgrade , Belgrade, Serbia
| | - Čedo Miljević
- Outpatient Department, Institute of Mental Health, School of Medicine, University of Belgrade , Belgrade, Serbia
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Asia P, Sharma A, Kumar Ahirwar A, Garg S, Elgiva John J, Gopal N. The study of ischemia modified albumin as an early biomarker of epilepsy in adolescent population: a cross-sectional study. Horm Mol Biol Clin Investig 2021; 42:183-187. [PMID: 33544499 DOI: 10.1515/hmbci-2020-0060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 01/17/2021] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Epilepsy is one of the most common neurological disorders, diagnosis of which is challenging as many unrelated conditions may mimic seizure. Epilepsy impairs the quality of life of patients due to associated physical and psychological trauma. Epileptic patients are also at increased risk of premature death due to autonomic disturbance and fatal accidents. The aim of the present research work was to study ischemia modified albumin (IMA) as an early biomarker of epilepsy in the adolescent population. METHODS Twenty-five diagnosed cases of epilepsy and 25 healthy volunteers as control of adolescent group were recruited as study subjects. The study subjects were age and sex matched. Clinical evaluation, routine biochemical parameters and IMA estimation were carried out. Serum IMA was measured by spectrophotometric method. RESULTS The mean serum IMA levels were significantly raised in epileptic patients (0.69 ± 0.1 absorbance units [ABSU]) as compared to the healthy control group (0.52 ± 0.24 ABSU) (p=0.004). ROC curve of IMA predicted that at cut off of 0.59 ABSU, the IMA has 96% sensitivity and 52% specificity for diagnosing epilepsy. CONCLUSIONS IMA may be used as a biomarker for early diagnosis of epilepsy as well as to differentiate epileptic seizure from various non epileptic disorders in the adolescent population.
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Affiliation(s)
- Priyanka Asia
- Department of Biochemistry, All India Institute of Medical Sciences, Nagpur, Maharashtra, India
| | - Anuj Sharma
- All India Institute of Medical Sciences, Nagpur, Maharashtra, India
| | - Ashok Kumar Ahirwar
- Department of Biochemistry, All India Institute of Medical Sciences, Nagpur, Maharashtra, India
| | - Seema Garg
- Department of Biochemistry, All India Institute of Medical Sciences, Nagpur, Maharashtra, India
| | - Jyoti Elgiva John
- Department of Biochemistry, All India Institute of Medical Sciences, Nagpur, Maharashtra, India
| | - Niranjan Gopal
- Department of Biochemistry, All India Institute of Medical Sciences, Nagpur, Maharashtra, India
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Opačić M, Ristić AJ, Sokić D, Baščarević V, Raičević S, Savić S, Zorović M, Živin M, Šelih VS, Spasojević I, Savić D. Regional distribution of cytochrome c oxidase activity and copper in sclerotic hippocampi of epilepsy patients. Brain Behav 2021. [PMCID: PMC7882178 DOI: 10.1002/brb3.1986] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Introduction Disruption of copper homeostasis and dysfunction of mitochondria have been documented in sclerotic hippocampi (HS) of patients with mesial temporal lobe epilepsy (mTLE). However, a potential link between these pathological changes has not been tackled so far. Herein, we analyzed regional distribution of neuron somata density, copper concentration, and the activity of cytochrome c oxidase (CCO), a component of mitochondrial electron transport chain and copper‐containing metalloprotein, in HS. Methods Histochemical staining and laser ablation inductively coupled plasma mass spectrometry were carried out to construct comparable maps of these parameters in coronal sections of hippocampi of 3 mTLE‐HS patients and 3 control subjects. Results Copper levels were decreased in all regions of HS with pyramidal neuron somata. CCO activity was significantly reduced in stratum pyramidale (PY) 1 and cornu Ammonis field 4, the two regions with significant reduction in neuron somata density. CCO activity was also lower in layers that contain apical dendrites of pyramidal neurons and mossy fibers. It appears that copper deficiency in PY2 and PY3 comes before CCO activity reduction and neuronal loss. A strong positive correlation was found between neuron density, Cu concentration, and CCO activity. Conclusions Presented results imply that pathological alterations in Cu and energy metabolism could be involved in the development of HS. A limitation of this study was the relatively small number of patients. However, presented results underline copper deficiency as a component of pathological mechanisms of epilepsy and warrant further investigation of cuproproteins and members of copper transport machinery.
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Affiliation(s)
- Miloš Opačić
- Department of Life Sciences Institute for Multidisciplinary Research University of Belgrade Belgrade Serbia
| | - Aleksandar J. Ristić
- Centre for Epilepsy and Sleep Disorders Neurology Clinic Clinical Centre of Serbia Belgrade Serbia
| | - Dragoslav Sokić
- Centre for Epilepsy and Sleep Disorders Neurology Clinic Clinical Centre of Serbia Belgrade Serbia
| | | | - Savo Raičević
- Institute for Neurosurgery Clinical Centre of Serbia Belgrade Serbia
| | - Slobodan Savić
- Institute of Forensic Medicine ‘Milovan Milovanović’ Medical School University of Belgrade Belgrade Serbia
| | - Maja Zorović
- Brain Research Laboratory Institute of Pathophysiology Medical Faculty University of Ljubljana Ljubljana Slovenia
| | - Marko Živin
- Brain Research Laboratory Institute of Pathophysiology Medical Faculty University of Ljubljana Ljubljana Slovenia
| | - Vid Simon Šelih
- Department of Analytical Chemistry National Institute of Chemistry Ljubljana Slovenia
| | - Ivan Spasojević
- Department of Life Sciences Institute for Multidisciplinary Research University of Belgrade Belgrade Serbia
| | - Danijela Savić
- Department of Neurobiology Institute for Biological Research ‘Siniša Stanković’ – National Institute of Republic of Serbia University of Belgrade Belgrade Serbia
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Antioxidants Targeting Mitochondrial Oxidative Stress: Promising Neuroprotectants for Epilepsy. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:6687185. [PMID: 33299529 PMCID: PMC7710440 DOI: 10.1155/2020/6687185] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 11/13/2020] [Accepted: 11/16/2020] [Indexed: 12/14/2022]
Abstract
Mitochondria are major sources of reactive oxygen species (ROS) within the cell and are especially vulnerable to oxidative stress. Oxidative damage to mitochondria results in disrupted mitochondrial function and cell death signaling, finally triggering diverse pathologies such as epilepsy, a common neurological disease characterized with aberrant electrical brain activity. Antioxidants are considered as promising neuroprotective strategies for epileptic condition via combating the deleterious effects of excessive ROS production in mitochondria. In this review, we provide a brief discussion of the role of mitochondrial oxidative stress in the pathophysiology of epilepsy and evidences that support neuroprotective roles of antioxidants targeting mitochondrial oxidative stress including mitochondria-targeted antioxidants, polyphenols, vitamins, thiols, and nuclear factor E2-related factor 2 (Nrf2) activators in epilepsy. We point out these antioxidative compounds as effectively protective approaches for improving prognosis. In addition, we specially propose that these antioxidants exert neuroprotection against epileptic impairment possibly by modulating cell death interactions, notably autophagy-apoptosis, and autophagy-ferroptosis crosstalk.
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13
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Functional Nutrients for Epilepsy. Nutrients 2019; 11:nu11061309. [PMID: 31185666 PMCID: PMC6628163 DOI: 10.3390/nu11061309] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/05/2019] [Accepted: 06/06/2019] [Indexed: 12/11/2022] Open
Abstract
Epilepsy is a common neurological disorder of which seizures are a core symptom. Approximately one third of epileptic patients are resistant to antiepileptic drugs and therefore require alternative therapeutic options. Dietary and nutritional supplements can in some cases replace drugs, but with the exception of ketogenic diets, there are no officially recommended dietary considerations for patients with epilepsy. In this review we summarize a selection of nutritional suggestions that have proved beneficial in treating different types of epilepsy. We describe the types of seizures and epilepsy and follow this with an introduction to basic molecular mechanisms. We then examine several functional nutrients for which there is clinical evidence of therapeutic efficacy in reducing seizures or epilepsy-associated sudden death. We also discuss experimental results that demonstrate possible molecular mechanisms elicited by the administration of various nutrients. The availability of multiple dietary and nutritional candidates that show favorable outcomes in animals implies that assessing the clinical potential of these substances will improve translational medicine, ultimately benefitting epilepsy patients.
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Immunohistochemical Study of Antioxidant Enzymes Regulated by Nrf2 in the Models of Epileptic Seizures (KA and PTZ). OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:1327986. [PMID: 31019649 PMCID: PMC6451808 DOI: 10.1155/2019/1327986] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 01/10/2019] [Accepted: 02/17/2019] [Indexed: 12/31/2022]
Abstract
Epilepsy is a neurological disorder characterized by recurrent spontaneous seizures due to an imbalance between cerebral excitability and inhibition, with a tendency towards uncontrolled excitability. Epilepsy has been associated with oxidative and nitrosative stress due to prolonged neuronal hyperexcitation and loss neurons during seizures. The experimental animal models report level of ATP diminished and increase in lipid peroxidation, catalase, and glutathione altered activity in the brain. We studied the immunohistochemical expression and localization of antioxidant enzymes GPx, SOD, and CAT in the rat brains treated with KA and PTZ. A significant decrease was observed in the number of immunoreactive cells to GPx, without significant changes for SOD and CAT in KA-treated rats, and decrease in the number of immunoreactive cells to SOD, without significant changes for GPx and only CAT in PTZ-treated rats. Evident immunoreactivity of GPx, SOD, and CAT was observed mainly in astrocytes and neurons of the hippocampal brain region in rats exposed at KA; similar results were observed in rats treated with PTZ at the first hours. These results provide evidence supporting the role of activation of the Nrf2 antioxidant system pathway against oxidative stress effects in the experimental models of epileptic seizures.
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Genetic overexpression of glutathione peroxidase-1 attenuates microcystin-leucine-arginine-induced memory impairment in mice. Neurochem Int 2018; 118:152-165. [PMID: 29908255 DOI: 10.1016/j.neuint.2018.06.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 05/14/2018] [Accepted: 06/12/2018] [Indexed: 11/21/2022]
Abstract
Microcystin-leucine-arginine (MCLR) is the most common form of microcystins, which are environmental toxins produced by cyanobacteria, and its hepatotoxicity has been well-documented. However, the neurotoxic potential of MCLR remains to be further elucidated. In the present study, we investigated whether intracerebroventricular (i.c.v.) infusion of MCLR induces mortality and neuronal loss in the hippocampus of mice. Because we found that MCLR impairs memory function in the hippocampus at a low dose (4 ng/μl/mouse, i.c.v.) without a significant neuronal loss, we focused on this dose for further analyses. Results showed that MCLR (4 ng/μl/mouse, i.c.v.) significantly increased oxidative stress (i.e., malondialdehyde, protein carbonyl, and synaptosomal ROS) in the hippocampus. In addition, MCLR significantly increased superoxide dismutase (SOD) activity without corresponding induction of glutathione peroxidase (GPx) activity, and thus led to significant decrease in the ratio of GPx/SODs activity. The GSH/GSSG ratio was also significantly reduced after MCLR treatment. GPx-1 overexpressing transgenic mice (GPx-1 Tg) were significantly protected from MCLR-induced memory impairment and oxidative stress. The DNA binding activity of nuclear factor erythroid-derived 2-related factor 2 (Nrf2) in these mice was significantly enhanced, and the ratios of GPx/SODs activity and GSH/GSSG returned to near control levels in the hippocampus. Importantly, memory function exhibited a significant positive correlation with the ratios of GPx/SODs activity and GSH/GSSG in the hippocampus of MCLR-treated non-transgenic (non-Tg)- and GPx-1 Tg-mice. Combined, our results suggest that MCLR induces oxidative stress and memory impairment without significant neuronal loss, and that GPx-1 gene constitutes an important protectant against MCLR-induced memory impairment and oxidative stress via maintaining antioxidant defense system homeostasis, possibly through the induction of Nrf2 transcription factor.
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Pearson-Smith JN, Patel M. Metabolic Dysfunction and Oxidative Stress in Epilepsy. Int J Mol Sci 2017; 18:ijms18112365. [PMID: 29117123 PMCID: PMC5713334 DOI: 10.3390/ijms18112365] [Citation(s) in RCA: 165] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 10/27/2017] [Accepted: 10/30/2017] [Indexed: 01/17/2023] Open
Abstract
The epilepsies are a heterogeneous group of disorders characterized by the propensity to experience spontaneous recurrent seizures. Epilepsies can be genetic or acquired, and the underlying mechanisms of seizure initiation, seizure propagation, and comorbid conditions are incompletely understood. Metabolic changes including the production of reactive species are known to result from prolonged seizures and may also contribute to epilepsy development. In this review, we focus on the evidence that metabolic and redox disruption is both cause and consequence of epileptic seizures. Additionally, we discuss the promise of targeting redox processes as a therapeutic option in epilepsy.
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Affiliation(s)
- Jennifer N Pearson-Smith
- Department of Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA.
| | - Manisha Patel
- Department of Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA.
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Opačić M, Ristić AJ, Savić D, Šelih VS, Živin M, Sokić D, Raičević S, Baščarević V, Spasojević I. Metal maps of sclerotic hippocampi of patients with mesial temporal lobe epilepsy. Metallomics 2017; 9:141-148. [DOI: 10.1039/c6mt00293e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mitochondria-Targeted Antioxidants: Future Perspectives in Kidney Ischemia Reperfusion Injury. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:2950503. [PMID: 27313826 PMCID: PMC4894993 DOI: 10.1155/2016/2950503] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 04/28/2016] [Indexed: 02/03/2023]
Abstract
Kidney ischemia/reperfusion injury emerges in various clinical settings as a great problem complicating the course and outcome. Ischemia/reperfusion injury is still an unsolved puzzle with a great diversity of investigational approaches, putting the focus on oxidative stress and mitochondria. Mitochondria are both sources and targets of ROS. They participate in initiation and progression of kidney ischemia/reperfusion injury linking oxidative stress, inflammation, and cell death. The dependence of kidney proximal tubule cells on oxidative mitochondrial metabolism makes them particularly prone to harmful effects of mitochondrial damage. The administration of antioxidants has been used as a way to prevent and treat kidney ischemia/reperfusion injury for a long time. Recently a new method based on mitochondria-targeted antioxidants has become the focus of interest. Here we review the current status of results achieved in numerous studies investigating these novel compounds in ischemia/reperfusion injury which specifically target mitochondria such as MitoQ, Szeto-Schiller (SS) peptides (Bendavia), SkQ1 and SkQR1, and superoxide dismutase mimics. Based on the favorable results obtained in the studies that have examined myocardial ischemia/reperfusion injury, ongoing clinical trials investigate the efficacy of some novel therapeutics in preventing myocardial infarct. This also implies future strategies in preventing kidney ischemia/reperfusion injury.
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Griffin NG, Wang Y, Hulette CM, Halvorsen M, Cronin KD, Walley NM, Haglund MM, Radtke RA, Skene JHP, Sinha SR, Heinzen EL. Differential gene expression in dentate granule cells in mesial temporal lobe epilepsy with and without hippocampal sclerosis. Epilepsia 2016; 57:376-85. [PMID: 26799155 DOI: 10.1111/epi.13305] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/02/2015] [Indexed: 02/01/2023]
Abstract
OBJECTIVE Hippocampal sclerosis is the most common neuropathologic finding in cases of medically intractable mesial temporal lobe epilepsy. In this study, we analyzed the gene expression profiles of dentate granule cells of patients with mesial temporal lobe epilepsy with and without hippocampal sclerosis to show that next-generation sequencing methods can produce interpretable genomic data from RNA collected from small homogenous cell populations, and to shed light on the transcriptional changes associated with hippocampal sclerosis. METHODS RNA was extracted, and complementary DNA (cDNA) was prepared and amplified from dentate granule cells that had been harvested by laser capture microdissection from surgically resected hippocampi from patients with mesial temporal lobe epilepsy with and without hippocampal sclerosis. Sequencing libraries were sequenced, and the resulting sequencing reads were aligned to the reference genome. Differential expression analysis was used to ascertain expression differences between patients with and without hippocampal sclerosis. RESULTS Greater than 90% of the RNA-Seq reads aligned to the reference. There was high concordance between transcriptional profiles obtained for duplicate samples. Principal component analysis revealed that the presence or absence of hippocampal sclerosis was the main determinant of the variance within the data. Among the genes up-regulated in the hippocampal sclerosis samples, there was significant enrichment for genes involved in oxidative phosphorylation. SIGNIFICANCE By analyzing the gene expression profiles of dentate granule cells from surgically resected hippocampal specimens from patients with mesial temporal lobe epilepsy with and without hippocampal sclerosis, we have demonstrated the utility of next-generation sequencing methods for producing biologically relevant results from small populations of homogeneous cells, and have provided insight on the transcriptional changes associated with this pathology.
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Affiliation(s)
- Nicole G Griffin
- Institute for Genomic Medicine, Columbia University, New York, New York, U.S.A
| | - Yu Wang
- Department of Neurobiology, Duke University School of Medicine, Durham, North Carolina, U.S.A
| | - Christine M Hulette
- Department of Pathology, Duke University School of Medicine, Durham, North Carolina, U.S.A
| | - Matt Halvorsen
- Institute for Genomic Medicine, Columbia University, New York, New York, U.S.A
| | - Kenneth D Cronin
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, U.S.A
| | - Nicole M Walley
- Division of Medical Genetics, Department of Pediatrics, Duke University School of Medicine, Durham, North Carolina, U.S.A
| | - Michael M Haglund
- Department of Neurosurgery, Duke University School of Medicine, Durham, North Carolina, U.S.A
| | - Rodney A Radtke
- Department of Neurology, Duke University School of Medicine, Durham, North Carolina, U.S.A
| | - J H Pate Skene
- Department of Neurobiology, Duke University School of Medicine, Durham, North Carolina, U.S.A
| | - Saurabh R Sinha
- Department of Neurology, Duke University School of Medicine, Durham, North Carolina, U.S.A
| | - Erin L Heinzen
- Institute for Genomic Medicine, Columbia University, New York, New York, U.S.A.,Department of Pathology and Cell Biology, Columbia University, New York, New York, U.S.A
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Nikolić-Kokić A, Mijušković A, Tatalović N, Nestorov J, Miler M, Oreščanin-Dušić Z, Nikolić M, Milošević V, Blagojević D, Spasić M, Miljević Č. Effects of antipsychotic drug administration on antioxidative defense enzymes in male rat kidney. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2016; 79:905-911. [PMID: 27644343 DOI: 10.1080/15287394.2016.1201706] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 06/11/2016] [Indexed: 06/06/2023]
Abstract
The use of atypical antipsychotic drugs (APD) was reported to be associated with adverse effects on the kidneys. Thus, the aim of this study was to examine whether APD exerted their adverse effects by interfering with the renal antioxidant defense system. Male 3-mo-old Wistar rats were treated for 28 d with ziprasidone (ZIP), clozapine (CLO), or sertindole (SER) using a daily dose recommended for antipsychotic drug therapy. The expression and activities of antioxidant enzymes superoxide dismutase (SOD) type 1 and type 2, catalase (CAT), glutathione reductase (GR), and glutathione S-transferases (GSTs) activity were measured in the kidneys. Changes in the kidneys were also evaluated histologically. Ziprasidone, CLO, and SER reduced renal SOD type 1 and type 2 activities. Decreased CAT activity was observed only in SER-treated rats. An inhibition in GR activity and increased activity of GST was found only after treatment with CLO. Histological analysis showed dilatation of proximal tubules in kidneys with all three drugs. In conclusion, data indicate that redox disturbances may contribute to renal morphologic alterations in proximal tubules in rats treated with all APD.
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Affiliation(s)
- Aleksandra Nikolić-Kokić
- a Department of Physiology , Institute for Biological Research "Siniša Stanković," University of Belgrade , Belgrade , Serbia
| | - Ana Mijušković
- a Department of Physiology , Institute for Biological Research "Siniša Stanković," University of Belgrade , Belgrade , Serbia
| | - Nikola Tatalović
- a Department of Physiology , Institute for Biological Research "Siniša Stanković," University of Belgrade , Belgrade , Serbia
| | - Jelena Nestorov
- b Department of Biochemistry , Institute for Biological Research "Siniša Stanković," University of Belgrade , Belgrade , Serbia
| | - Marko Miler
- c Department of Cytology , Institute for Biological Research "Siniša Stanković," University of Belgrade , Belgrade , Serbia
| | - Zorana Oreščanin-Dušić
- a Department of Physiology , Institute for Biological Research "Siniša Stanković," University of Belgrade , Belgrade , Serbia
| | - Milan Nikolić
- d Department of Biochemistry, Faculty of Chemistry , University of Belgrade , Belgrade , Serbia
| | - Verica Milošević
- c Department of Cytology , Institute for Biological Research "Siniša Stanković," University of Belgrade , Belgrade , Serbia
| | - Duško Blagojević
- a Department of Physiology , Institute for Biological Research "Siniša Stanković," University of Belgrade , Belgrade , Serbia
| | - Mihajlo Spasić
- a Department of Physiology , Institute for Biological Research "Siniša Stanković," University of Belgrade , Belgrade , Serbia
| | - Čedo Miljević
- e Institute of Mental Health, School of Medicine , University of Belgrade , Belgrade , Serbia
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The role and potential mechanism of resveratrol in the prevention and control of epilepsy. Future Med Chem 2015; 7:2005-18. [PMID: 26505553 DOI: 10.4155/fmc.15.130] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Epilepsy is one of the most common diseases affecting the nervous system, with more than 50 million patients suffering from epilepsy worldwide. Although epilepsy has been prevalent for thousands of years, it is still not possible to completely control the disease. Despite an increase in the number of available antiepileptic drugs, the incidence of epilepsy and its cure rate have not been substantially improved; thus, there is an urgent need to identify new drugs that treat, cure or protect against epilepsy. Resveratrol is a polyphenol compound with a broad range of biological activity; not only it has considerable antiepileptic effects, but it is also neuroprotective and has functions to counter epileptic depression. Resveratrol has the potential to be a new antiepileptic drug, thus further studies are needed to better investigate its potential.
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