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Song C, Zhao J, Hao J, Mi D, Zhang J, Liu Y, Wu S, Gao F, Jiang W. Aminoprocalcitonin protects against hippocampal neuronal death via preserving oxidative phosphorylation in refractory status epilepticus. Cell Death Discov 2023; 9:144. [PMID: 37142587 PMCID: PMC10160063 DOI: 10.1038/s41420-023-01445-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 04/19/2023] [Accepted: 04/21/2023] [Indexed: 05/06/2023] Open
Abstract
Refractory status epilepticus (RSE) is a neurological emergency where sustaining seizure causes severe neuronal death. Currently, there is no available neuroprotectant effective in RSE. Aminoprocalcitonin (NPCT) is a conserved peptide cleaved from procalcitonin, but its distribution and function in the brain remain enigmatic. Survival of neurons relies on sufficient energy supply. Recently, we found that NPCT was extensively distributed in the brain and had potent modulations on neuronal oxidative phosphorylation (OXPHOS), suggesting that NPCT might be involved in neuronal death by regulating energy status. In the present study, combining biochemical and histological methods, high-throughput RNA-sequence, Seahorse XFe analyser, an array of mitochondria function assays, and behavior-electroencephalogram (EEG) monitoring, we investigated the roles and translational values of NPCT in neuronal death after RSE. We found that NPCT was extensively distributed throughout gray matters in rat brain while RSE triggered NPCT overexpression in hippocampal CA3 pyramidal neurons. High-throughput RNA-sequence demonstrated that the influences of NPCT on primary hippocampal neurons were enriched in OXPHOS. Further function assays verified that NPCT facilitated ATP production, enhanced the activities of mitochondrial respiratory chain complexes I, IV, V, and increased neuronal maximal respiration capacity. NPCT exerted multiple neurotrophic effects including facilitating synaptogenesis, neuritogenesis, spinogenesis, and suppression of caspase-3. A polyclonal NPCT immunoneutralization antibody was developed to antagonize NPCT. In the in vitro 0-Mg2+ seizure model, immunoneutralization of NPCT caused more neuronal death, while exogenous NPCT supplementation, though did not reverse death outcomes, preserved mitochondrial membrane potential. In rat RSE model, both peripheral and intracerebroventricular immunoneutralization of NPCT exacerbated hippocampal neuronal death and peripheral immunoneutralization increased mortality. Intracerebroventricular immunoneutralization of NPCT further led to more serious hippocampal ATP depletion, and significant EEG power exhaustion. We conclude that NPCT is a neuropeptide regulating neuronal OXPHOS. During RSE, NPCT was overexpressed to protect hippocampal neuronal survival via facilitating energy supply.
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Affiliation(s)
- Changgeng Song
- Department of Neurology, Xijing Hospital, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, 710032, Shaanxi, China
| | - Jingjing Zhao
- Department of Neurology, Xijing Hospital, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, 710032, Shaanxi, China
| | - Jianmin Hao
- Department of Neurology, Xijing Hospital, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, 710032, Shaanxi, China
| | - Dan Mi
- Department of Neurology, Xijing Hospital, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, 710032, Shaanxi, China
| | - Jiajia Zhang
- National Translational Science Centre for Molecular Medicine & Department of Cell Biology, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, 710032, Shaanxi, China
| | - Yingying Liu
- Department of Neurobiology, Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, 710032, Shaanxi, China
| | - Shengxi Wu
- Department of Neurobiology, Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, 710032, Shaanxi, China
| | - Fang Gao
- Department of Neurobiology, Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, 710032, Shaanxi, China.
| | - Wen Jiang
- Department of Neurology, Xijing Hospital, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, 710032, Shaanxi, China.
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Zhang X, Ye Y, Sun J, Wang JS, Tang L, Xu Y, Ji J, Sun X. Abnormal neurotransmission of GABA and serotonin in Caenorhabditis elegans induced by Fumonisin B1. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 304:119141. [PMID: 35301029 DOI: 10.1016/j.envpol.2022.119141] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 03/07/2022] [Accepted: 03/11/2022] [Indexed: 06/14/2023]
Abstract
Fumonisin B1 (FB1) is a neurodegenerative mycotoxin synthesized by Fusarium spp., but the potential neurobehavioral toxicity effects in organisms have not been characterized clearly. Caenorhabditis elegans (C. elegans) has emerged as a promising model organism for neurotoxicological studies due to characteristics such as well-functioning nervous system and rich behavioral phenotypes. To investigate whether FB1 has neurobehavioral toxicity effects on C. elegans, the motor behavior, neuronal structure, neurotransmitter content, and gene expression related with neurotransmission of C. elegans were determined after exposed to 20-200 μg/mL FB1 for 24 h and 48 h, respectively. Results showed that FB1 caused behavioral defects, including body bends, head thrashes, crawling distance, mean speed, mean amplitude, mean wavelength, foraging behavior, and chemotaxis learning ability in a dose-, and time-dependent manner. In addition, when C. elegans was exposed to FB1 at a concentration of 200 μg/mL for 24 h and above 100 μg/mL for 48 h, the GABAergic and serotonergic neurons were damaged, but no effect on dopaminergic, glutamatergic, and cholinergic neurons. The relative content of GABA and serotonin decreased significantly. Furthermore, abnormal expression of mRNA levels associated with GABA and serotonin were found in nematodes treated with FB1, such as unc-30, unc-47, unc-49, exp-1, mod-5, cat-1, and tph-1. The neurobehavioral toxicity effect of FB1 may be mediated by abnormal neurotransmission of GABA and serotonin. This study provides useful information for understanding the neurotoxicity of FB1.
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Affiliation(s)
- Xiaojuan Zhang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu, 214122, PR China
| | - Yongli Ye
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu, 214122, PR China
| | - Jiadi Sun
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu, 214122, PR China
| | - Jia-Sheng Wang
- Department of Environmental Health Science, College of Public Health, University of Georgia, Athens, GA, USA
| | - Lili Tang
- Department of Environmental Health Science, College of Public Health, University of Georgia, Athens, GA, USA
| | - Yida Xu
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu, 214122, PR China
| | - Jian Ji
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu, 214122, PR China
| | - Xiulan Sun
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu, 214122, PR China.
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Nguyen VTT, König S, Eggert S, Endres K, Kins S. The role of mycotoxins in neurodegenerative diseases: current state of the art and future perspectives of research. Biol Chem 2021; 403:3-26. [PMID: 34449171 DOI: 10.1515/hsz-2021-0214] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 08/16/2021] [Indexed: 01/02/2023]
Abstract
Mycotoxins are fungal metabolites that can cause various diseases in humans and animals. The adverse health effects of mycotoxins such as liver failure, immune deficiency, and cancer are well-described. However, growing evidence suggests an additional link between these fungal metabolites and neurodegenerative diseases. Despite the wealth of these initial reports, reliable conclusions are still constrained by limited access to human patients and availability of suitable cell or animal model systems. This review summarizes knowledge on mycotoxins associated with neurodegenerative diseases and the assumed underlying pathophysiological mechanisms. The limitations of the common in vivo and in vitro experiments to identify the role of mycotoxins in neurotoxicity and thereby in neurodegenerative diseases are elucidated and possible future perspectives to further evolve this research field are presented.
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Affiliation(s)
- Vu Thu Thuy Nguyen
- Department of Psychiatry and Psychotherapy, University Medical Center of the Johannes Gutenberg-University Mainz, Untere Zahlbacher Str. 8, D-55131 Mainz, Germany
| | - Svenja König
- Department of Human Biology and Human Genetics, University of Kaiserslautern, Erwin-Schrödinger-Straße 13, D-67663 Kaiserslautern, Germany
| | - Simone Eggert
- Department of Human Biology and Human Genetics, University of Kaiserslautern, Erwin-Schrödinger-Straße 13, D-67663 Kaiserslautern, Germany
| | - Kristina Endres
- Department of Psychiatry and Psychotherapy, University Medical Center of the Johannes Gutenberg-University Mainz, Untere Zahlbacher Str. 8, D-55131 Mainz, Germany
| | - Stefan Kins
- Department of Human Biology and Human Genetics, University of Kaiserslautern, Erwin-Schrödinger-Straße 13, D-67663 Kaiserslautern, Germany
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Paul S, Jakhar R, Bhardwaj M, Chauhan AK, Kang SC. Fumonisin B1 induces poly (ADP-ribose) (PAR) polymer-mediated cell death (parthanatos) in neuroblastoma. Food Chem Toxicol 2021; 154:112326. [PMID: 34111490 DOI: 10.1016/j.fct.2021.112326] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 06/01/2021] [Accepted: 06/02/2021] [Indexed: 12/25/2022]
Abstract
Fumonisin B1 (FB1) is a well-known mycotoxin produced by Fusarium spp. and has a wide range of dose-dependent toxic effects, including nephrotoxicity, hepatotoxicity, and neurotoxicity. This research illustrated that FB1 exerts its toxicity in the neuroblastoma cell line through a distinct cell-death pathway called parthanatos. FB1 can cause excessive DNA strand breaks, leading to poly (ADP-ribose) polymerase-1 (PARP-1) overactivation and cell death. In this study, we used 50 μM FB1-treated SH-SY5Y neuroblastoma cells to elucidate the signaling pathway of FB1-induced parthanatos. We observed that FB1-induced cell death is caspase-independent and accompanied by rapid activation of PARP-1, c-Jun N-terminal kinase activation, reactive oxygen species (ROS) generation, and intracellular calcium increase. FB1 treatment also increased endoplasmic reticulum stress due to the rapid increase of calcium ions and ROS levels. In addition, FB1 induced massive DNA damage and chromatin decondensation. We also observed that apoptosis-inducing factor nuclear translocation and PAR accumulation were associated with the necroptosis signal.
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Affiliation(s)
- Souren Paul
- The Hormel Institute, University of Minnesota, 801 16th Ave NE, Austin, MN, 55912, USA; Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook, 38453, Republic of Korea
| | - Rekha Jakhar
- Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook, 38453, Republic of Korea
| | - Monika Bhardwaj
- Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook, 38453, Republic of Korea
| | - Anil Kumar Chauhan
- Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook, 38453, Republic of Korea
| | - Sun Chul Kang
- Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook, 38453, Republic of Korea.
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Sheik Abdul N, Marnewick JL. Fumonisin B 1 -induced mitochondrial toxicity and hepatoprotective potential of rooibos: An update. J Appl Toxicol 2020; 40:1602-1613. [PMID: 32667064 DOI: 10.1002/jat.4036] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/27/2020] [Accepted: 06/23/2020] [Indexed: 12/18/2022]
Abstract
Fumonisins are a family of potentially carcinogenic mycotoxins produced by Fusarium verticillioides. Several fumonisins have been identified with fumonisin B1 (FB1 ) being the most toxic. The canonical mechanism of FB1 toxicity is centered on its structural resemblance with sphinganine and consequent competitive inhibition of ceramide synthase and disruption of lipidomic profiles. Recent and emerging evidence at the molecular level has identified the disruption of mitochondria and excessive generation of toxic reactive oxygen species (ROS) as alternative/additional mechanisms of toxicity. The understanding of how these pathways contribute to FB1 toxicity can lead to the identification of novel, effective approaches to protecting vulnerable populations. Natural compounds with antioxidant properties seem to protect against the induced toxic effects of FB1 . Rooibos (Aspalathus linearis), endemic to South Africa, has traditionally been used as a medicinal herbal tea with strong scientific evidence supporting its anecdotal claims. The unique composition of phytochemicals and combination of metabolic activators, adaptogens and antioxidants make rooibos an attractive yet underappreciated intervention for FB1 toxicoses. In the search for a means to address FB1 toxicoses as a food safety problem in developing countries, phytomedicine and traditional knowledge systems must play an integral part. This review aims to summarize the growing body of evidence succinctly, which highlights mitochondrial dysfunction as a secondary toxic effect responsible for the FB1 -induced generation of ROS. We further propose the potential of rooibos to combat this induced toxicity based on its integrated bioactive properties, as a socio-economically viable strategy to prevent and/or repair cellular damage caused by FB1 .
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Affiliation(s)
- Naeem Sheik Abdul
- Applied Microbial and Health Biotechnology Institute, Cape Peninsula University of Technology, Bellville, South Africa
| | - Jeanine L Marnewick
- Applied Microbial and Health Biotechnology Institute, Cape Peninsula University of Technology, Bellville, South Africa
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Short-term neuronal effects of fumonisin B1 on neuronal activity in rodents. Neurotoxicology 2020; 80:41-51. [PMID: 32561249 DOI: 10.1016/j.neuro.2020.06.007] [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] [Received: 12/03/2019] [Revised: 06/05/2020] [Accepted: 06/15/2020] [Indexed: 11/24/2022]
Abstract
Fumonisin B1 (FB1) is a mycotoxin produced by microscopic fungi (mostly Fusarium species), which may infect our major crops. The toxin inhibits the development of these plants and may also have harmful effects on animals and humans consuming the infected crops. FB1 inhibits sphingolipid biosynthesis which leads to altered membrane characteristics and consequently, altered cellular functions. There are some indications that the toxin has inhibitory effects on neuronal activity in case of repeated consumption, presumably due to sphingolipid depletion. However, according to new literature data, FB1 may have acute excitatory neural effects, too, via different mechanisms of action. Therefore, in the present study, we addressed the neuronal network effects of FB1 following acute treatment, using different electrophysiological techniques in vitro and in vivo. Acute treatments with FB1 (10-100 μM) were carried out on brain slices, tissue cultures and live animals. After direct treatment of samples, electrically evoked or spontaneous field potentials were examined in the hippocampus and the neocortex of rat brain slices and in hippocampal cell cultures. In the hippocampus, a short-term increase in the excitability of neuronal networks and individual cells was observed in response to FB1 treatment. In some cases, the initially enhanced excitation was reversed presumably due to overactivation of neuronal networks. Normal spontaneous activity was found to be stimulated in hippocampal cell cultures. Seizure susceptibility was not affected in the neocortex of brain slices. For the verification of the results caused by direct treatment, effects of systemic administration of FB1 (7.5 mg/kg, i.p.) were also examined. Evoked field potentials recorded in vivo from the somatosensory cortex and cell activation measured by the c-fos technique in hippocampus and somatosensory cortex were analyzed. However, the hippocampal and cortical stimulatory effect detected in vitro could not be demonstrated by these in vivo assays. Altogether, the toxin enhanced the basic excitability of neurons and neuronal networks after direct treatment but there were no effects on the given brain areas after systemic treatment in vivo. Based on the observed in vitro FB1 effects and the lack of data on the penetration of FB1 across the blood-brain barrier, we assume that in vivo consequences of FB1 administration can be more prominent in case of perturbed blood-brain barrier functions.
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Cellular mechanisms of complex I-associated pathology. Biochem Soc Trans 2020; 47:1963-1969. [PMID: 31769488 DOI: 10.1042/bst20191042] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 11/08/2019] [Accepted: 11/08/2019] [Indexed: 11/17/2022]
Abstract
Mitochondria control vitally important functions in cells, including energy production, cell signalling and regulation of cell death. Considering this, any alteration in mitochondrial metabolism would lead to cellular dysfunction and the development of a disease. A large proportion of disorders associated with mitochondria are induced by mutations or chemical inhibition of the mitochondrial complex I - the entry point to the electron transport chain. Subunits of the enzyme NADH: ubiquinone oxidoreductase, are encoded by both nuclear and mitochondrial DNA and mutations in these genes lead to cardio and muscular pathologies and diseases of the central nervous system. Despite such a clear involvement of complex I deficiency in numerous disorders, the molecular and cellular mechanisms leading to the development of pathology are not very clear. In this review, we summarise how lack of activity of complex I could differentially change mitochondrial and cellular functions and how these changes could lead to a pathology, following discrete routes.
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Islam MT, Mishra SK, Tripathi S, de Alencar MVOB, e Sousa JMDC, Rolim HML, de Medeiros MDGF, Ferreira PMP, Rouf R, Uddin SJ, Mubarak MS, Melo-Cavalcante AADC. Mycotoxin-assisted mitochondrial dysfunction and cytotoxicity: Unexploited tools against proliferative disorders. IUBMB Life 2018; 70:1084-1092. [DOI: 10.1002/iub.1932] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 05/30/2018] [Accepted: 07/26/2018] [Indexed: 12/26/2022]
Affiliation(s)
- Muhammad Torequl Islam
- Department for Management of Science and Technology Development; Ton Duc Thang University; Ho Chi Minh City 700000 Vietnam
- Faculty of Pharmacy; Ton Duc Thang University; Ho Chi Minh City 700000 Vietnam
| | - Siddhartha Kumar Mishra
- Cancer Biology Laboratory; School of Biological Sciences (Zoology), Dr. Harisingh Gour Central University; Sagar 470003 Madhya Pradesh India
| | - Swati Tripathi
- Amity Institute of Microbial Technology; Amity University; Noida 201313 Uttar Pradesh India
| | | | - João Marcelo de Castro e Sousa
- Postgraduate Program in Pharmaceutical Sciences; Federal University of Piaui; Teresina 64 049-550 Brazil
- Department of Biological Sciences; Federal University of Piauí; Picos Piauí 64 067-670 Brazil
| | - Hercília Maria Lins Rolim
- Postgraduate Program in Pharmaceutical Sciences; Federal University of Piaui; Teresina 64 049-550 Brazil
| | - Maria das Graças Freire de Medeiros
- Department for Management of Science and Technology Development; Ton Duc Thang University; Ho Chi Minh City 700000 Vietnam
- Department of Biological Sciences; Federal University of Piauí; Picos Piauí 64 067-670 Brazil
| | - Paulo Michel Pinheiro Ferreira
- Postgraduate Program in Pharmaceutical Sciences; Federal University of Piaui; Teresina 64 049-550 Brazil
- Department of Biophysics and Physiology; Laboratory of Experimental Cancerology, Federal University of Piauí; Teresina Piauí 64 049-550 Brazil
| | - Razina Rouf
- Department of Pharmacy; Bangabandhu Sheikh Mujibur Rahman Science & Technology University; Gopalganj Bangladesh
| | - Shaikh Jamal Uddin
- Pharmacy Discipline; Life Science School, Khulna University; Khulna Bangladesh
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Angelova PR, Vinogradova D, Neganova ME, Serkova TP, Sokolov VV, Bachurin SO, Shevtsova EF, Abramov AY. Pharmacological Sequestration of Mitochondrial Calcium Uptake Protects Neurons Against Glutamate Excitotoxicity. Mol Neurobiol 2018; 56:2244-2255. [PMID: 30008072 PMCID: PMC6394642 DOI: 10.1007/s12035-018-1204-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 06/26/2018] [Indexed: 12/14/2022]
Abstract
Neuronal excitotoxicity which is induced by exposure to excessive extracellular glutamate is shown to be involved in neuronal cell death in acute brain injury and a number of neurological diseases. High concentration of glutamate induces calcium deregulation which results in mitochondrial calcium overload and mitochondrial depolarization that triggers the mechanism of cell death. Inhibition of mitochondrial calcium uptake could be potentially neuroprotective but complete inhibition of mitochondrial calcium uniporter could result in the loss of some physiological processes linked to Ca2+ in mitochondria. Here, we found that a novel compound, TG-2112x, can inhibit only the lower concentrations mitochondrial calcium uptake (induced by 100 nM-5 μM) but not the uptake induced by higher concentrations of calcium (10 μM and higher). This effect was not associated with changes in mitochondrial membrane potential and cellular respiration. However, a pre-treatment of neurons with TG-2112x protected the neurons against calcium overload upon application of toxic concentrations of glutamate. Thus, sequestration of mitochondrial calcium uptake protected the neurons against glutamate-induced mitochondrial depolarization and cell death. In our hands, TG-2112x was also protective against ionomycin-induced cell death. Hence, low rate mitochondrial calcium uptake plays an underestimated role in mitochondrial function, and its inhibition could protect neurons against calcium overload and cell death in glutamate excitotoxicity.
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Affiliation(s)
- Plamena R Angelova
- Department of Molecular Neuroscience, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Darya Vinogradova
- Institute of Physiologically Active Compounds Russian Academy of Sciences, Chernogolovka, 142432, Russia
| | - Margarita E Neganova
- Institute of Physiologically Active Compounds Russian Academy of Sciences, Chernogolovka, 142432, Russia
| | - Tatiana P Serkova
- Institute of Physiologically Active Compounds Russian Academy of Sciences, Chernogolovka, 142432, Russia
| | - Vladimir V Sokolov
- Institute of Physiologically Active Compounds Russian Academy of Sciences, Chernogolovka, 142432, Russia
| | - Sergey O Bachurin
- Institute of Physiologically Active Compounds Russian Academy of Sciences, Chernogolovka, 142432, Russia
| | - Elena F Shevtsova
- Institute of Physiologically Active Compounds Russian Academy of Sciences, Chernogolovka, 142432, Russia.
| | - Andrey Y Abramov
- Department of Molecular Neuroscience, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK.
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Neginskaya M, Berezhnaya E, Uzdensky AB, Abramov AY. Reactive Oxygen Species Produced by a Photodynamic Effect Induced Calcium Signal in Neurons and Astrocytes. Mol Neurobiol 2017; 55:96-102. [DOI: 10.1007/s12035-017-0721-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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11
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Zhang H, Zhang L, Diao X, Li N, Liu C. Toxicity of the mycotoxin fumonisin B 1 on the insect Sf9 cell line. Toxicon 2017; 129:20-27. [DOI: 10.1016/j.toxicon.2017.01.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Revised: 01/21/2017] [Accepted: 01/23/2017] [Indexed: 12/19/2022]
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Poersch AB, Trombetta F, Souto NS, de Oliveira Lima C, Braga ACM, Dobrachinski F, Ribeiro LR, Soares FAA, Fighera MR, Royes LFF, Oliveira MS, Furian AF. Fumonisin B1 facilitates seizures induced by pentylenetetrazol in mice. Neurotoxicol Teratol 2015; 51:61-7. [PMID: 26342287 DOI: 10.1016/j.ntt.2015.08.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 08/24/2015] [Accepted: 08/26/2015] [Indexed: 10/23/2022]
Abstract
Fumonisin B1 (FB1) is a Fusarium spp. mycotoxin which constitutes a major public health issue because of its worldwide distribution and diversity of toxic effects.While the liver and kidney are considered the major target organs of FB1 toxicity in several species, evidence indicates that FB1 may be toxic to the brain. To further investigate the effects of FB1 on the central nervous system the present study aimed to test the hypothesis that acute FB1 exposure causes brain hyperexcitability and the potential underlying mechanisms. For these purposes, adult male C57BL/6 mice were injected with FB1 (8 mg/kg, i.p.) or its vehicle and 30 min thereafter received with a low dose of the classical convulsant pentylenetetrazol (PTZ, 30 mg/kg, i.p.) or its vehicle. After behavioral evaluation the cerebral cortex and the hippocampus were collected for analysis of Na(+),K(+)-ATPase activity, mitochondrial membrane potential (ΔΨm) and mitochondrial complex I and II activities. We found that FB1 reduced the latency for PTZ-induced myoclonic jerks and increased the number of these events. After exposure to FB1 total and α1 Na(+),K(+)-ATPase activities increased in cerebral cortex, whereas the same enzyme activities decreased in the hippocampus. Although no changes in mitochondrial complex I and II activities were found, acute exposure to FB1 increased ΔΨm in the cerebral cortex. Altogether, present results indicate that FB1 causes brain hyperexcitability in vivo, and that mitochondrial dysfunction may represent a potential underlying mechanism.
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Affiliation(s)
- Alice Bertotto Poersch
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil
| | - Francielle Trombetta
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil
| | - Naiéli Schiefelbein Souto
- Programa de Pós Graduação em Ciência e Tecnologia dos Alimentos, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil
| | - Camilla de Oliveira Lima
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil
| | - Ana Cláudia Monteiro Braga
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil
| | - Fernando Dobrachinski
- Programa de Pós Graduação em Bioquímica Toxicológica, Universidade Federal de Santa Maria, Campus UFSM, Santa Maria, RS 97105-900, Brazil
| | - Leandro Rodrigo Ribeiro
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil
| | - Félix Alexandre Antunes Soares
- Programa de Pós Graduação em Bioquímica Toxicológica, Universidade Federal de Santa Maria, Campus UFSM, Santa Maria, RS 97105-900, Brazil
| | - Michele Rechia Fighera
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil
| | - Luiz Fernando Freire Royes
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil; Programa de Pós Graduação em Bioquímica Toxicológica, Universidade Federal de Santa Maria, Campus UFSM, Santa Maria, RS 97105-900, Brazil
| | - Mauro Schneider Oliveira
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil; Programa de Pós Graduação em Bioquímica Toxicológica, Universidade Federal de Santa Maria, Campus UFSM, Santa Maria, RS 97105-900, Brazil
| | - Ana Flávia Furian
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil; Programa de Pós Graduação em Ciência e Tecnologia dos Alimentos, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil.
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Krivoi II. Functional interactions of Na,K-ATPase with molecular environment. Biophysics (Nagoya-shi) 2014. [DOI: 10.1134/s000635091405011x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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Yu N, Liu H, Di Q. Modulation of Immunity and the Inflammatory Response: A New Target for Treating Drug-resistant Epilepsy. Curr Neuropharmacol 2013; 11:114-27. [PMID: 23814544 PMCID: PMC3580785 DOI: 10.2174/157015913804999540] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Revised: 07/16/2012] [Accepted: 11/17/2012] [Indexed: 12/11/2022] Open
Abstract
Until recently, epilepsy medical therapy is usually limited to anti-epileptic drugs (AEDs). However, approximately 1/3 of epilepsy patients, described as drug-resistant epilepsy (DRE) patients, still suffer from continuous frequent seizures despite receiving adequate AEDs treatment of sufficient duration. More recently, with the remarkable progress of immunology, immunity and inflammation are considered to be key elements of the pathobiology of epilepsy. Activation of inflammatory processes in brain tissue has been observed in both experimental seizure animal models and epilepsy patients. Anti-inflammatory and immunotherapies also showed significant anticonvulsant properties both in clinical and in experimental settings. The above emerging evidence indicates that modulation of immunity and inflammatory processes could serve as novel specific targets to achieve potential anticonvulsant effects for the patients with epilepsy, especially DRE. Herein we review the recent evidence supporting the role of inflammation in the development and perpetuation of seizures, and also discuss the recent achievements in modulation of inflammation and immunotherapy applied to the treatment of epilepsy. Apart from medical therapy, we also discuss the influences of surgery, ketogenic diet, and electroconvulsive therapy on immunity and inflammation in DRE patients. Taken together, a promising perspective is suggested for future immunomodulatory therapies in the treatment of patients with DRE.
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Affiliation(s)
- Nian Yu
- Department of Neurology, Nanjing Brain Hospital affiliated to Nanjing Medical University, Nanjing, Jiangsu, China
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Suwanjang W, Holmström KM, Chetsawang B, Abramov AY. Glucocorticoids reduce intracellular calcium concentration and protects neurons against glutamate toxicity. Cell Calcium 2013; 53:256-63. [PMID: 23340218 PMCID: PMC4208294 DOI: 10.1016/j.ceca.2012.12.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Revised: 12/14/2012] [Accepted: 12/24/2012] [Indexed: 10/27/2022]
Abstract
Glucocorticoids are steroid hormones which act through the glucocorticoid receptor. They regulate a wide variety of biological processes. Two glucocorticoids, the naturally occurring corticosterone and chemically produced dexamethasone, have been used to investigate the effect of glucocorticoids on Ca(2+)-signalling in cortical co-cultures of neurons and astrocytes. Dexamethasone and to a lesser degree corticosterone both induced a decrease in cytosolic Ca(2+) concentration in neurons and astrocytes. The effect of both compounds can be blocked by inhibition of the plasmamembrane ATPase, calmodulin and by application of a glucocorticoid receptor antagonist, while inhibition of NMDA receptors or the endoplasmic reticulum calcium pump had no effect. Glucocorticoid treatment further protects against detrimental calcium signalling and cell death by modulating the delayed calcium deregulation in response to glutamate toxicity. At the concentrations used dexamethasone and corticosterone did not show cell toxicity of their own. Thus, these results indicate that dexamethasone and corticosterone might be used for protection of the cells from calcium overload.
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Affiliation(s)
- Wilasinee Suwanjang
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Nakhonpathom, Thailand
| | - Kira M. Holmström
- Department of Molecular Neuroscience, Queen Square, London WC1N 3BG, UK
| | - Banthit Chetsawang
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Nakhonpathom, Thailand
| | - Andrey Y. Abramov
- Department of Molecular Neuroscience, Queen Square, London WC1N 3BG, UK
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Hendriks HS, van Kleef RGDM, Westerink RHS. Modulation of human α4β2 nicotinic acetylcholine receptors by brominated and halogen-free flame retardants as a measure for in vitro neurotoxicity. Toxicol Lett 2012; 213:266-74. [PMID: 22750351 DOI: 10.1016/j.toxlet.2012.06.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 06/18/2012] [Accepted: 06/20/2012] [Indexed: 11/16/2022]
Abstract
Brominated flame retardants (BFRs) are abundant persistent organic pollutants with well-studied toxicity. The toxicological and ecological concern associated with BFRs argues for replacement by safer alternatives. However, the (neuro)toxic potential of alternative halogen-free flame retardants (HFFRs) is unknown. Previous research identified the nervous system as a sensitive target organ for BFRs, with modulation of excitatory nicotinic acetylcholine (nACh) receptors as one of the modes of action. Since it is essential to assess the (neuro)toxic potential of HFFRs before large scale use, we measured the effects of three BFRs and 13 HFFRs on the function of human α(4)β(2) nACh receptors, expressed in Xenopus oocytes, using the two-electrode voltage-clamp technique. The results demonstrate that some BFRs (TBBPA and to a lesser extent BDE-209) and HFFRs (TPP, Alpi, APP, MMT and to a lesser extent ATH, ATO, MHO, MPP, RDP and ZHS) act as nACh receptor antagonists. Contrary, BPS, BDP, DOPO and ZS were unable to modulate nACh receptors. Despite the lack of toxicological data on HFFRs and the need for additional studies to perform a full (neuro)toxic risk assessment, the current data on antagonistic effects on nACh receptors could be an important step in prioritizing viable HFFRs for substitution of BFRs.
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Affiliation(s)
- Hester S Hendriks
- Neurotoxicology Research Group, Toxicology Division, Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, P.O. Box 80.177, NL-3508 TD Utrecht, The Netherlands
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