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Ivanova E, Matyushkin A, Sorokina A, Alexeeva S, Miroshkina I, Kachalov K, Voronina T, Durnev A. Low-Affinity NMDA Receptor Antagonist Hemantane in a Topical Formulation Attenuates Arthritis Induced by Freund's Complete Adjuvant in Rats. Adv Pharm Bull 2024; 14:241-252. [PMID: 38585463 PMCID: PMC10997923 DOI: 10.34172/apb.2024.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 04/12/2023] [Accepted: 07/14/2023] [Indexed: 04/09/2024] Open
Abstract
Purpose N-methyl-D-aspartate (NMDA) receptors that are expressed by T-cells modulate T-cell proliferation, cytotoxicity and cell migration toward chemokines. Several studies have shown an anti-inflammatory effect of NMDA receptor antagonists. This study compares the effect of the noncompetitive low-affinity NMDA receptor antagonist N-(2-adamantyl)-hexamethyleneimine hydrochloride (hemantane) in a topical formulation (gel) with the cyclooxygenase (COX) inhibitor diclofenac in a topical formulation (gel) in rats with arthritis induced by Freund's Complete Adjuvant (FCA). Methods On day 14 after an FCA injection into the left hind paw, rats with contralateral hind paw edema were selected for further investigation (29/65). They were treated with 5% hemantane gel or 1% diclofenac gel applied locally to hind paws daily for 2 weeks starting 14 days after the FCA injection. Rats with arthritis were examined hind paw edema, hyperalgesia, and motor deficits; their body weight and hematological parameters were recorded. The rats were euthanized on day 28, followed by histological examination of the ankle joint (HE stain). Results Rats with arthritis exhibited hind paw inflammation and hyperalgesia, motor deficits, changes of hematological parameters, reduced weight gain and spleen hypertrophy. Histological examination of the ankle joint revealed degenerative-dystrophic lesions of the cartilaginous tissue, proliferative inflammation of the synovium, edema and lymphocytic/macrophage infiltration of periarticular tissues. Hemantane gel reduced hind paw edema, pain, motor deficits and histological signs of inflammation; its effect was comparable to diclofenac gel. Conclusion Hemantane gel alleviates FCA-induced arthritis in rats, and its effect is comparable to diclofenac gel.
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Affiliation(s)
- Elena Ivanova
- Laboratory of Psychopharmacology, FSBI Zakusov Institute of Pharmacology, Moscow, Russia
| | - Alexander Matyushkin
- Laboratory of Psychopharmacology, FSBI Zakusov Institute of Pharmacology, Moscow, Russia
| | - Alexandra Sorokina
- Laboratory of Drug toxicology, FSBI Zakusov Institute of Pharmacology, Moscow, Russia
| | - Svetlana Alexeeva
- Laboratory of Drug toxicology, FSBI Zakusov Institute of Pharmacology, Moscow, Russia
| | - Irina Miroshkina
- Laboratory of Drug toxicology, FSBI Zakusov Institute of Pharmacology, Moscow, Russia
| | - Kirill Kachalov
- Laboratory of Drug toxicology, FSBI Zakusov Institute of Pharmacology, Moscow, Russia
| | - Tatyana Voronina
- Laboratory of Psychopharmacology, FSBI Zakusov Institute of Pharmacology, Moscow, Russia
| | - Andrey Durnev
- Laboratory of Drug toxicology, FSBI Zakusov Institute of Pharmacology, Moscow, Russia
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Kim J, Yoo ID, Lim J, Moon JS. Pathological phenotypes of astrocytes in Alzheimer's disease. Exp Mol Med 2024; 56:95-99. [PMID: 38172603 PMCID: PMC10834520 DOI: 10.1038/s12276-023-01148-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 10/30/2023] [Accepted: 11/01/2023] [Indexed: 01/05/2024] Open
Abstract
Astrocytes are involved in various processes in the central nervous system (CNS). As the most abundant cell type in the CNS, astrocytes play an essential role in neuronal maintenance and support, synaptic activity, neuronal metabolism, and amyloid-beta (Aβ) clearance. Alzheimer's disease (AD) is a neurodegenerative disorder associated with cognitive and behavioral impairment. The transformation of astrocytes is involved in various neurodegenerative diseases, such as AD. Since astrocytes have functional diversity and morphological and physiological heterogeneity in the CNS, AD-related astrocytes might show various pathological phenotypes during AD. Astrocytes developing pathological phenotypes could contribute to AD progression. In this review, we provide an overview of the pathological phenotypes of astrocytes in the context of AD, highlighting recent findings in human and mouse AD.
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Affiliation(s)
- Junhyung Kim
- Department of Integrated Biomedical Science, Soonchunhyang Institute of Medi-bio Science (SIMS), Soonchunhyang University, Cheonan, 31151, Chungcheongnam-do, South Korea
| | - Ik Dong Yoo
- Department of Nuclear Medicine, Soonchunhyang University Hospital Cheonan, Cheonan, 31151, Chungcheongnam-do, South Korea
| | - Jaejoon Lim
- Department of Neurosurgery, Bundang CHA Medical Center, CHA University, Yatap-dong 59, Seongnam, 13496, South Korea.
| | - Jong-Seok Moon
- Department of Integrated Biomedical Science, Soonchunhyang Institute of Medi-bio Science (SIMS), Soonchunhyang University, Cheonan, 31151, Chungcheongnam-do, South Korea.
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Wang X, Yang J, Huang P, Wang D, Zhang Z, Zhou Z, Liang L, Yao R, Yang L. Cytisine: State of the art in pharmacological activities and pharmacokinetics. Biomed Pharmacother 2024; 171:116210. [PMID: 38271893 DOI: 10.1016/j.biopha.2024.116210] [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: 11/14/2023] [Revised: 01/02/2024] [Accepted: 01/22/2024] [Indexed: 01/27/2024] Open
Abstract
Cytisine is a naturally occurring bioactive compound, an alkaloid mainly isolated from legume plants. In recent years, various biological activities of cytisine have been explored, showing certain effects in smoking cessation, reducing drinking behavior, anti-tumor, cardiovascular protection, blood sugar regulation, neuroprotection, osteoporosis prevention and treatment, etc. At the same time, cytisine has the advantages of high efficiency, safety, and low cost, has broad development prospects, and is a drug of great application value. However, a summary of cytisine's biological activities is currently lacking. Therefore, this paper summarizes the pharmacological action, mechanism, and pharmacokinetics of cytisine by referring to numerous databases, and analyzes the new and core targets of cytisine with the help of computer simulation technology, to provide reference for doctors.
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Affiliation(s)
- Xuezhen Wang
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Jiaming Yang
- Research Center for Infectious Diseases, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Peifeng Huang
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Dong Wang
- The First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Zhibin Zhang
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Zehua Zhou
- Research Center for Infectious Diseases, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Leiqin Liang
- Research Center for Infectious Diseases, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China.
| | - Rongmei Yao
- Research Center for Infectious Diseases, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China.
| | - Long Yang
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China; Research Center for Infectious Diseases, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China; School of Public Health, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China.
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Köhler S, Winkler U, Junge T, Lippmann K, Eilers J, Hirrlinger J. Gray and white matter astrocytes differ in basal metabolism but respond similarly to neuronal activity. Glia 2023; 71:229-244. [PMID: 36063073 DOI: 10.1002/glia.24268] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 07/12/2022] [Accepted: 08/22/2022] [Indexed: 11/10/2022]
Abstract
Astrocytes are a heterogeneous population of glial cells in the brain, which adapt their properties to the requirements of the local environment. Two major groups of astrocytes are protoplasmic astrocytes residing in gray matter as well as fibrous astrocytes of white matter. Here, we compared the energy metabolism of astrocytes in the cortex and corpus callosum as representative gray matter and white matter regions, in acute brain slices taking advantage of genetically encoded fluorescent nanosensors for the NADH/NAD+ redox ratio and for ATP. Astrocytes of the corpus callosum presented a more reduced basal NADH/NAD+ redox ratio, and a lower cytosolic concentration of ATP compared to cortical astrocytes. In cortical astrocytes, the neurotransmitter glutamate and increased extracellular concentrations of K+ , typical correlates of neuronal activity, induced a more reduced NADH/NAD+ redox ratio. While application of glutamate decreased [ATP], K+ as well as the combination of glutamate and K+ resulted in an increase of ATP levels. Strikingly, a very similar regulation of metabolism by K+ and glutamate was observed in astrocytes in the corpus callosum. Finally, strong intrinsic neuronal activity provoked by application of bicuculline and withdrawal of Mg2+ caused a shift of the NADH/NAD+ redox ratio to a more reduced state as well as a slight reduction of [ATP] in gray and white matter astrocytes. In summary, the metabolism of astrocytes in cortex and corpus callosum shows distinct basal properties, but qualitatively similar responses to neuronal activity, probably reflecting the different environment and requirements of these brain regions.
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Affiliation(s)
- Susanne Köhler
- Faculty of Medicine, Carl-Ludwig-Institute for Physiology, Leipzig University, Leipzig, Germany
| | - Ulrike Winkler
- Faculty of Medicine, Carl-Ludwig-Institute for Physiology, Leipzig University, Leipzig, Germany
| | - Tabea Junge
- Faculty of Medicine, Carl-Ludwig-Institute for Physiology, Leipzig University, Leipzig, Germany
| | - Kristina Lippmann
- Faculty of Medicine, Carl-Ludwig-Institute for Physiology, Leipzig University, Leipzig, Germany
| | - Jens Eilers
- Faculty of Medicine, Carl-Ludwig-Institute for Physiology, Leipzig University, Leipzig, Germany
| | - Johannes Hirrlinger
- Faculty of Medicine, Carl-Ludwig-Institute for Physiology, Leipzig University, Leipzig, Germany.,Department of Neurogenetics, Max-Planck-Institute for Multidisciplinary Sciences, Göttingen, Germany
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da Silva Lemos I, Wessler LB, Duarte MB, da Silva GL, Bernardo HT, Candiotto G, Torres CA, Petronilho F, Rico EP, Streck EL. Exposure to leucine alters glutamate levels and leads to memory and social impairment in zebrafish. Metab Brain Dis 2022; 37:2925-2935. [PMID: 36040712 DOI: 10.1007/s11011-022-01070-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 08/08/2022] [Indexed: 10/14/2022]
Abstract
Maple Syrup Urine Disease (MSUD) is a metabolic disorder characterized by high levels in blood and urine of branched-chain amino acids leucine, isoleucine, and valine and their alpha-ketoacids, by a partial or total blockade in the activity of branched-chain complex alpha-keto acids dehydrogenase. The main symptoms in MSUD occur in the central nervous system, including cognitive deficits, locomotor, poor feeding, seizures, psychomotor delay, and mental retardation, but the mechanisms of neurotoxicity and behavior alteration due to this disease are poorly understood, thus this study aimed at showing the effects of leucine exposure on glutamate levels and behavior in zebrafish. For this, we analyzed the behavior using the social preference test and novel object recognition test, moreover, we analyse the glutamate levels and uptake using scintillation and high-performance liquid chromatography methods. Our results demonstrated a decrease in glutamate levels and uptake, accompanied by memory and social impairment. In conclusion, these results suggest that alterations in glutamate levels can be associated with behavior impairment, however, more studies are necessary to understand the mechanisms for brain damage in MSUD.
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Affiliation(s)
- Isabela da Silva Lemos
- Laboratório de Doenças Neurometabólicas, Programa de Pós-graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000, Criciúma, SC, Brasil
| | - Leticia Burato Wessler
- Laboratório de Doenças Neurometabólicas, Programa de Pós-graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000, Criciúma, SC, Brasil
| | - Mariane Bernardo Duarte
- Laboratório de Doenças Neurometabólicas, Programa de Pós-graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000, Criciúma, SC, Brasil
| | - Guilherme Lodetti da Silva
- Laboratório de Psiquiatria Translacional, Programa de Pós-graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000, Criciúma, SC, Brasil
| | - Henrique Teza Bernardo
- Laboratório de Psiquiatria Translacional, Programa de Pós-graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000, Criciúma, SC, Brasil
| | - Gabriela Candiotto
- Laboratório de Doenças Neurometabólicas, Programa de Pós-graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000, Criciúma, SC, Brasil
| | - Carolina Antunes Torres
- Laboratório de Doenças Neurometabólicas, Programa de Pós-graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000, Criciúma, SC, Brasil
| | - Fabricia Petronilho
- Laboratório de Neurologia Experimental, Programa de Pós-graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000, Criciúma, SC, Brasil
| | - Eduardo Pacheco Rico
- Laboratório de Psiquiatria Translacional, Programa de Pós-graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000, Criciúma, SC, Brasil
| | - Emilio Luiz Streck
- Laboratório de Doenças Neurometabólicas, Programa de Pós-graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000, Criciúma, SC, Brasil.
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Ando M, Mok WJ, Maeda Y, Miki R, Fukuda T, Tsukamasa Y. Quality assessment of yellowtail (
Seriola quinqueradiata
) meat cultured in an offshore floating flexible facility. FOOD SCIENCE & NUTRITION 2022; 10:3024-3033. [PMID: 36171766 PMCID: PMC9469846 DOI: 10.1002/fsn3.2898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 03/29/2022] [Accepted: 04/07/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Masashi Ando
- Department of Fisheries Faculty of Agriculture Kindai University Nara Japan
| | - Wen Jye Mok
- Institute of Marine Biotechnology Universiti Malaysia Terengganu Terengganu Malaysia
| | - Yuji Maeda
- Nippon Steel Engineering Co., Ltd. Business Solution Center Fukuoka Japan
| | - Ryoji Miki
- Nippon Steel Engineering Co., Ltd. Business Solution Center Fukuoka Japan
| | - Takashi Fukuda
- Department of Fisheries Faculty of Agriculture Kindai University Nara Japan
| | - Yasuyuki Tsukamasa
- Department of Fisheries Faculty of Agriculture Kindai University Nara Japan
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Becic A, Leifeld J, Shaukat J, Hollmann M. Tetraspanins as Potential Modulators of Glutamatergic Synaptic Function. Front Mol Neurosci 2022; 14:801882. [PMID: 35046772 PMCID: PMC8761850 DOI: 10.3389/fnmol.2021.801882] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 12/07/2021] [Indexed: 12/16/2022] Open
Abstract
Tetraspanins (Tspans) comprise a membrane protein family structurally defined by four transmembrane domains and intracellular N and C termini that is found in almost all cell types and tissues of eukaryotes. Moreover, they are involved in a bewildering multitude of diverse biological processes such as cell adhesion, motility, protein trafficking, signaling, proliferation, and regulation of the immune system. Beside their physiological roles, they are linked to many pathophysiological phenomena, including tumor progression regulation, HIV-1 replication, diabetes, and hepatitis. Tetraspanins are involved in the formation of extensive protein networks, through interactions not only with themselves but also with numerous other specific proteins, including regulatory proteins in the central nervous system (CNS). Interestingly, recent studies showed that Tspan7 impacts dendritic spine formation, glutamatergic synaptic transmission and plasticity, and that Tspan6 is correlated with epilepsy and intellectual disability (formerly known as mental retardation), highlighting the importance of particular tetraspanins and their involvement in critical processes in the CNS. In this review, we summarize the current knowledge of tetraspanin functions in the brain, with a particular focus on their impact on glutamatergic neurotransmission. In addition, we compare available resolved structures of tetraspanin family members to those of auxiliary proteins of glutamate receptors that are known for their modulatory effects.
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Combination of Geniposide and Eleutheroside B Exerts Antidepressant-like Effect on Lipopolysaccharide-Induced Depression Mice Model. Chin J Integr Med 2019; 27:534-541. [PMID: 31784933 DOI: 10.1007/s11655-019-3051-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/22/2019] [Indexed: 12/17/2022]
Abstract
OBJECTIVE To study the antidepressant-like effect and action mechanism of geniposide and eleutheroside B combination treatment on the lipopolysaccharide (LPS)-induced depression mice model. METHODS Depression mice model was established by lipopolysaccharide (LPS) injection. Totally 48 mice were randomly divided into 6 groups (8 rats per group) according to a random number table, including normal, model, fluoxetine (20 mg/kg), geniposide (100 mg/kg) + eleutheroside B (100 mg/kg), geniposide + eleutheroside B + WAY 100635 (0.03 mg/kg), geniposide + eleutheroside B+ N-methyl-D-aspartic acid receptor (NMDA, 75 mg/kg) groups, respectively. After continuous administration for 10 days, autonomic activity tests after 30 min of administration were performed on the 10th day. On the 11th day, except for the normal group, the mice in the other groups were intraperitoneally injected with LPS (1 mg/kg), and the behavioral tests were performed 4 h later. Enzyme linked immunosorbent assay was used to detect tumor necrosis factor alpha (TNF- α) and interleukin-1 β (IL-1 β) levels in mice serum. The mRNA expression of indoleamine 2,3-dioxygenase (IDO) and nuclear transcription factor (NF- κB) were detected by real-time quantitative polymerase chain reaction. Western-blot analysis was used to detect IDO and NF- κB protein expressions in hippocampus tissue. RESULTS Compared with the normal group, a single administration of LPS increased the immobility time in the forced swimming test (FST) and tail suspension test (TST, P<0.01), without affecting autonomous activity. Compared with the model group, fluoxetine and geniposide + eleutheroside B administration significantly improved the immobility time of depressed mice in the FST and TST, decreased serum IL-1 β content, inhibited the expression levels of NF- κ B gene and protein in hippocampus tissues (P<0.05 or P<0.01). Compared with the model group, geniposide + eleutheroside B treatment significantly reduced serum TNF-α content and inhibited IDO mRNA and protein expressions in hippocampus (P<0.05 or P<0.01). In addition, NMDA partly prevented the inhibition of IDO mRNA expression by geniposide + eleutheroside B; NMDA and WAY-100635 also partly prevented the reduction of IL-1 ß content induced by geniposide + eleutheroside B treatment (P<0.05 or P<0.01). CONCLUSIONS The combination of geniposide and eleutheroside B showed a certain antidepression-like effect. Its main mechanism of action may be contributed to inhibiting the activation of NF- κB, decreasing the proinflammatory cytokines such as TNF-α, IL-1 β, and inhibiting in the neuroinflammatory reaction. Additionally, it also affects tryptophan metabolism, reduces the expression of a key enzyme of tryptophan metabolism, IDO. And this antidepressant-like effect may be mediated by 5-hydroxytryptamine and glutamate systems.
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Interneuron dysfunction in epilepsy: An experimental approach using immature brain insults to induce neuronal migration disorders. Epilepsy Res 2019; 156:106185. [DOI: 10.1016/j.eplepsyres.2019.106185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 07/13/2019] [Accepted: 08/02/2019] [Indexed: 01/16/2023]
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Abdanipour A, Moradi F, Fakheri F, Ghorbanlou M, Nejatbakhsh R. The effect of lithium chloride on BDNF, NT3, and their receptor mRNA levels in the spinal contusion rat models. Neurol Res 2019; 41:577-583. [DOI: 10.1080/01616412.2019.1588507] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Alireza Abdanipour
- Department of Anatomy, School of Medicine, Zanjan University of Medical Sciences (ZUMS), Zanjan, Iran
| | - Fatemeh Moradi
- Department of Anatomy, School of Medicine, Zanjan University of Medical Sciences (ZUMS), Zanjan, Iran
| | - Farzaneh Fakheri
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
- Young Researchers and Elite Club, Zanjan Branch, Islamic Azad University, Zanjan, Iran
| | - Mehrdad Ghorbanlou
- Department of Anatomy, School of Medicine, Zanjan University of Medical Sciences (ZUMS), Zanjan, Iran
| | - Reza Nejatbakhsh
- Department of Anatomy, School of Medicine, Zanjan University of Medical Sciences (ZUMS), Zanjan, Iran
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Cheong SH, Lee DS. Taurine Chloramine Prevents Neuronal HT22 Cell Damage Through Nrf2-Related Heme Oxygenase-1. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 975 Pt 1:145-157. [PMID: 28849451 DOI: 10.1007/978-94-024-1079-2_13] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Oxidative cell damages are able to contribute to neuronal degeneration in several diseases of the central nervous system (CNS) including stroke as well as ischemia. Heme oxygenase (HO)-1 plays a major role in the pathogenesis of neuronal disorder. Taurine chloramine (TauCl) has been shown to possess strong neuronal activities; however, the direct effects of TauCl on neuronal cell death remain to be determined. Therefore, this study was designed to assess the neuroprotective effect of TauCl using oxidative stress-stimulated mouse hippocampal HT22 cells. TauCl showed protective effects against oxidative stress-induced neurotoxicity and inhibited the reactive oxygen species (ROS) production by inducing the heme oxygenase (HO)-1 expression in HT22 cells. TauCl upregulated HO-1 expression and it also increased the nuclear factor E2-related factor 2 (Nrf2) translocation to nuclear. Using an inhibitor of HO-1 activity, we verified that the oxidative stress-related HT22 cell death was significantly suppressed by TauCl. In addition, we found reduced TauCl-induced HO-1 expression and cytoprotection following treatment of the cells with an extracellular signal-regulated kinase (ERK) inhibitor (PD98059) or a p38 inhibitor (SB203580), but not following treatment with a SP600125 as a c-Jun NH2-terminal kinase (JNK) inhibitor. These findings suggest that TauCl improves cellular damage induced by glutamate or H2O2 through ERK and p38, Nrf2, and HO-1 pathways in HT22 cells.
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Affiliation(s)
- Sun Hee Cheong
- Department of Marine Bio Food Science, College of Fisheries and Ocean Science, Chonnam National University, Yeosu, 550-749, South Korea.
| | - Dong-Sung Lee
- College of Pharmacy, Chosun University, Dong-gu, Gwangju, 61452, South Korea.
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Tambasco N, Romoli M, Calabresi P. Selective basal ganglia vulnerability to energy deprivation: Experimental and clinical evidences. Prog Neurobiol 2018; 169:55-75. [DOI: 10.1016/j.pneurobio.2018.07.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 07/24/2018] [Accepted: 07/27/2018] [Indexed: 02/07/2023]
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13
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Han C, Nie S, Chen G, Ma K, Xiong N, Zhang Z, Xu Y, Wang T, Papa SM, Cao X. Intrastriatal injection of ionomycin profoundly changes motor response to l-DOPA and its underlying molecular mechanisms. Neuroscience 2016; 340:23-33. [PMID: 27771532 DOI: 10.1016/j.neuroscience.2016.10.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 10/08/2016] [Accepted: 10/11/2016] [Indexed: 10/20/2022]
Abstract
Long-term l-DOPA treatment of Parkinson's disease is accompanied with fluctuations of motor responses and l-DOPA-induced dyskinesia (LID). Phosphorylation of the dopamine and c-AMP regulated phosphoprotein of 32kDa (DARPP-32) plays a role in the pathogenesis of LID, and thus dephosphorylation of this protein by activated calcineurin may help reduce LID. One important activator of calcineurin is the Ca2+ ionophore ionomycin. Here, we investigated whether intrastriatal injection of ionomycin to hemiparkinsonian rats produced changes in l-DOPA responses including LID. We also analyzed the effects of ionomycin on key molecular mediators of LID. Results confirmed our hypothesis that ionomycin could downregulate the phosphorylation of DARPP32 at Thr-34 and reduce LID. Besides, ionomycin decreased two established molecular markers of LID, FosB/ΔFosB and phosphorylated ERK1/2. Ionomycin also decreased the phosphorylation of three main subunits of the NMDA receptor, NR1 phosphorylated at ser896, NR2A phosphorylated at Tyr-1325, and NR2B phosphorylated at Tyr-1472. Furthermore, the anti-LID effect of striatally injected ionomycin was not accompanied by reduction of the antiparkinsonian action of l-DOPA. These data indicate that ionomycin largely interacts with striatal mechanisms that are critical to the l-DOPA motor response highlighting the role of protein dephosphorylation by calcineurin.
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Affiliation(s)
- Chao Han
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Shuke Nie
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Guiqin Chen
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Kai Ma
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Nian Xiong
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Zhentao Zhang
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Yan Xu
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
| | - Tao Wang
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Stella M Papa
- Yerkes National Primate Research Center, Department of Neurology, Emory University School of Medicine, Atlanta, GA 30329, USA
| | - Xuebing Cao
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
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Abstract
Glutamatergic synaptic transmission provides the major excitatory drive to neurons within the mammalian central nervous system, and the consequent activation of glutamate re ceptors participates in a variety of physiological and pathophysiological processes. There are several classes of ligand-gated glutamate receptors that express characteristic elec trophysiological properties. Glutamate receptors are multimeric proteins encoded by a large family of glutamate receptor genes, and individual genes are expressed by restricted populations of cells. One source of the functional diversity of glutamate receptors is the assembly of subunits into hetero-oligomeric complexes. An additional source of diversity comes from splice variants of individual subunits and editing of the messenger RNA se quence of some subunits at critical sites. Glutamate receptor subunit gene expression is dynamically regulated during development and in response to physiological and patho logical stimuli. Particular combinations of glutamate receptor subunits may express elec trophysiological properties that promote neuronal plasticity, whereas other combinations may have neurotoxic effects. The linkage of particular glutamate receptors to specific neuronal functions may provide an avenue for therapeutic intervention. The Neuroscientist 1:60-63, 1995
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Gill S, Veinot J, Kavanagh M, Pulido O. Human Heart Glutamate Receptors—Implications for Toxicology, Food Safety, and Drug Discovery. Toxicol Pathol 2016; 35:411-7. [PMID: 17455090 DOI: 10.1080/01926230701230361] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Excitatory amino acids (EAAs) mediate their effects through the glutamate receptors (GluRs) in the brain. GluRs play an important role in the treatment of a variety of neuropsychiatric conditions and are central to the neurotoxicity of EAAs such as domoic and kainic acid. Unstained histological preparations of human heart tissues were used for the histopathological assessment, the anatomical identification of specific cardiac structures and the presence of the GluRs. Immunohistochemical stains with the biomarkers protein gene product (PGP 9.5) and the neurofilaments (NF 160 and NF 200) were used to identify neural structures and the components of the conducting system. Several subtypes of GluRs were differentially expressed and each had a specific distribution. In contrast to nonhuman primates, GluRs are more widely expressed in humans, where the working myocardium and the wall of blood vessels stained for GluRs. The immunolabelling was observed within the specialized structures of the conducting system, intramural nerves, and ganglia cells. These receptors may be involved in important cardiac functions such as contraction, rhythm, coronary circulation, and thus may be implicated in the pathobiology of some cardiac disease. The GluRs in the heart could be targets for the effects of excitatory compounds and is therefore an important consideration for the safety evaluation of foods and therapeutic products.
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Affiliation(s)
- Santokh Gill
- Toxicology Research Division, Bureau of Chemical Safety, Food Directorate, HPFB, Health Canada, Ottawa, Ontario, K1A-OL2, P.L. 2202D2, Canada
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Saikusa T, Cai Y, Higuchi K, Ishikawa T, Ishida M. Selection of Lactic Acid Bacterium Lactococcus lactis RO50 which Produced High γ-Aminobutyric Acid (GABA) to Rice Flour Fermentation and Method for Producing of GABA-Enriched Rice Flour Using RO50. J JPN SOC FOOD SCI 2016. [DOI: 10.3136/nskkk.63.339] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Takayo Saikusa
- NARO Agricultural Research Center
- Present address : NARO headquarters
| | - Yimin Cai
- NARO Institute of Livestock and Grassland Science
| | | | - Tetsuya Ishikawa
- NARO Agricultural Research Center
- Present address : NARO headquarters
| | - Motohiko Ishida
- NARO Agricultural Research Center
- Present address : Bioresource and Environmental Science, Ishikawa Prefecture University
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Abstract
This review compares the biological and physiological function of Sigma receptors [σRs] and their potential therapeutic roles. Sigma receptors are widespread in the central nervous system and across multiple peripheral tissues. σRs consist of sigma receptor one (σ1R) and sigma receptor two (σ2R) and are expressed in numerous regions of the brain. The sigma receptor was originally proposed as a subtype of opioid receptors and was suggested to contribute to the delusions and psychoses induced by benzomorphans such as SKF-10047 and pentazocine. Later studies confirmed that σRs are non-opioid receptors (not an µ opioid receptor) and play a more diverse role in intracellular signaling, apoptosis and metabolic regulation. σ1Rs are intracellular receptors acting as chaperone proteins that modulate Ca2+ signaling through the IP3 receptor. They dynamically translocate inside cells, hence are transmembrane proteins. The σ1R receptor, at the mitochondrial-associated endoplasmic reticulum membrane, is responsible for mitochondrial metabolic regulation and promotes mitochondrial energy depletion and apoptosis. Studies have demonstrated that they play a role as a modulator of ion channels (K+ channels; N-methyl-d-aspartate receptors [NMDAR]; inositol 1,3,5 triphosphate receptors) and regulate lipid transport and metabolism, neuritogenesis, cellular differentiation and myelination in the brain. σ1R modulation of Ca2+ release, modulation of cardiac myocyte contractility and may have links to G-proteins. It has been proposed that σ1Rs are intracellular signal transduction amplifiers. This review of the literature examines the mechanism of action of the σRs, their interaction with neurotransmitters, pharmacology, location and adverse effects mediated through them.
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Affiliation(s)
- Colin G Rousseaux
- a Department of Pathology and Laboratory Medicine , University of Ottawa , Ottawa , ON , Canada and
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Takano T, Matsui K. Increased expression of GAP43 in interneurons in a rat model of experimental polymicrogyria. J Child Neurol 2015; 30:716-28. [PMID: 25061039 DOI: 10.1177/0883073814541476] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 06/01/2014] [Indexed: 12/15/2022]
Abstract
To investigate seizure susceptibility in polymicrogyria, the seizure threshold and growth-associated protein GAP43 expression were analyzed in a rat experimental model of polymicrogyria induced by intracerebral injection of ibotenate. A total of 72 neonates from 9 pregnant rats were used. Intraperitoneal pentylenetetrazole injection did not induce any seizure activity in the control rats, although it elicited seizures of variable severity in the polymicrogyria rats. Fluoro-Jade B-positive degenerating interneurons were found in the polymicrogyria brains; however, no such neurons were detected in the control brains. In the polymicrogyria rats, the GAP43 expression was significantly and widely distributed in the brain, and the percentage of parvalbumin-positive interneurons in the GAP43-positive cells was significantly higher than that observed in the nonphosphorylated neurofilament-positive pyramidal cells. We conclude that the relatively selective vulnerability of inhibitory interneurons constitutes the basis for the decreased seizure threshold observed in this model of polymicrogyria.
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Affiliation(s)
- Tomoyuki Takano
- Department of Pediatrics, Shiga University of Medical Science, Seta-Tsukinowa, Otsu, Japan
| | - Katsuyuki Matsui
- Department of Pediatrics, Shiga University of Medical Science, Seta-Tsukinowa, Otsu, Japan
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Souza GV, Simas AS, Bastos-Pereira AL, Frois GRA, Ribas JLC, Verdan MH, Kassuya CAL, Stefanello ME, Zampronio AR. Antinociceptive activity of the ethanolic extract, fractions, and aggregatin D isolated from Sinningia aggregata tubers. PLoS One 2015; 10:e0117501. [PMID: 25719394 PMCID: PMC4342217 DOI: 10.1371/journal.pone.0117501] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 12/26/2014] [Indexed: 01/06/2023] Open
Abstract
The present study investigated the effects of the ethanolic extract (ESa), fractions, and compounds isolated from Sinningia aggregata in male Swiss mice on carrageenan-induced paw edema, neutrophil migration, mechanical hyperalgesia, formalin-induced nociception, and lipopolysaccharide-induced fever. The ESa did not alter edema, neutrophil migration, or fever at any of the doses tested. However, the ESa reduced phase II of formalin-induced nociception and carrageenan-induced mechanical hyperalgesia. The petroleum ether (PE) and ethyl acetate (EA) fractions and aggregatin D (AgD; isolated from the EA fraction) reduced formalin-induced nociception. Anthraquinones from the PE fraction were ineffective. AgD also inhibited carrageenan-induced mechanical hyperalgesia. Neither the ESa nor AgD altered thermal nociception or motor performance. Local administration of AgD also reduced hyperalgesia induced by carrageenan, bradykinin, tumor necrosis factor-α, interleukin-1β, cytokine-induced neutrophil chemoattractant, prostaglandin E2, and dopamine but not hyperalgesia induced by forskolin or dibutyryl cyclic adenosine monophosphate. The positive control dipyrone reduced the response induced by all of the stimuli. Additionally, glibenclamide abolished the analgesic effect of dipyrone but not the one induced by AgD. AgD did not change lipopolysaccharide-induced nitric oxide production by macrophages or the nociception induced by capsaicin, cinnamaldehyde, acidified saline, or menthol. These results suggest that the ESa has important antinociceptive activity, and this activity results at least partially from the presence of AgD. AgD reduced mechanical hyperalgesia induced by several inflammatory mediators through mechanisms that are different from classic analgesic drugs.
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Affiliation(s)
- Geórgea V. Souza
- Department of Pharmacology, Federal University of Paraná, Centro Politécnico, PO Box 19031, Curitiba, PR, 81531-980, Brazil
| | - Alex S. Simas
- Department of Pharmacology, Federal University of Paraná, Centro Politécnico, PO Box 19031, Curitiba, PR, 81531-980, Brazil
| | - Amanda L. Bastos-Pereira
- Department of Pharmacology, Federal University of Paraná, Centro Politécnico, PO Box 19031, Curitiba, PR, 81531-980, Brazil
| | - Gisele R. A. Frois
- Department of Pharmacology, Federal University of Paraná, Centro Politécnico, PO Box 19031, Curitiba, PR, 81531-980, Brazil
| | - João L. C. Ribas
- Department of Pharmacology, Federal University of Paraná, Centro Politécnico, PO Box 19031, Curitiba, PR, 81531-980, Brazil
| | - Maria H. Verdan
- Department of Chemistry, Federal University of Paraná, Centro Politécnico, PO Box 19081, Curitiba, PR, 81530-900, Brazil
| | - Cândida A. L. Kassuya
- Department of Pharmacology, Federal University of Paraná, Centro Politécnico, PO Box 19031, Curitiba, PR, 81531-980, Brazil
| | - Maria E. Stefanello
- Department of Chemistry, Federal University of Paraná, Centro Politécnico, PO Box 19081, Curitiba, PR, 81530-900, Brazil
| | - Aleksander R. Zampronio
- Department of Pharmacology, Federal University of Paraná, Centro Politécnico, PO Box 19031, Curitiba, PR, 81531-980, Brazil
- * E-mail:
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Baicalin reverse AMPA receptor expression and neuron apoptosis in chronic unpredictable mild stress rats. Biochem Biophys Res Commun 2014; 451:467-72. [DOI: 10.1016/j.bbrc.2014.07.041] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 07/07/2014] [Indexed: 11/18/2022]
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Zakowski W, Bogus-Nowakowska K, Robak A. Embryonic and postnatal development of calcium-binding proteins immunoreactivity in the anterior thalamus of the guinea pig. J Chem Neuroanat 2013; 53:25-32. [PMID: 24060609 DOI: 10.1016/j.jchemneu.2013.09.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Revised: 08/20/2013] [Accepted: 09/15/2013] [Indexed: 10/26/2022]
Abstract
Our recent studies have shown that the distribution of calretinin (CR) in the anterior thalamic nuclei (ATN) changes significantly during the development of the guinea pig. The present study was designed to reveal the distribution pattern of calcium-binding proteins, i.e. calbindin (CB) and parvalbumin (PV), as well as the colocalization pattern of all three proteins, including CR, in the ATN of guinea pigs ranging from the 40th embryonic day (E40) to the 80th postnatal day (P80). According to these patterns, CB appears exclusively in the perikarya of the anteromedial nucleus (AM) not before P20 and always colocalizes with CR. Moreover, CB and CR colocalize in fibers of thin bundles traversing the anteroventral nucleus (AV) since E50. The ATN also display CB-positive neuropil in all studied stages, especially a strong one in the ventral part of the AV. PV was not observed in the perikarya of the ATN in all the stages, but was abundantly present in the neuropil of the anterodorsal nucleus (AD). No colocalizations exist between PV and the rest of the studied proteins. In conclusion, our study reveals that the distribution of the studied proteins differs greatly. Nevertheless, the postnatal coexistence of CB and CR in the AM perikarya may indicate the cooperation of both of the proteins in some functions of the nucleus. Parvalbumin is limited mostly to the neuropil of the AD, suggesting different functions in comparison to CB and CR.
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Affiliation(s)
- Witold Zakowski
- Department of Comparative Anatomy, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Pl. Łódzki 3, 10-727 Olsztyn, Poland.
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Hu S, Cui W, Mak S, Tang J, Choi C, Pang Y, Han Y. Bis(propyl)-cognitin protects against glutamate-induced neuro-excitotoxicity via concurrent regulation of NO, MAPK/ERK and PI3-K/Akt/GSK3β pathways. Neurochem Int 2013; 62:468-77. [DOI: 10.1016/j.neuint.2013.01.022] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Revised: 01/14/2013] [Accepted: 01/19/2013] [Indexed: 02/02/2023]
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Li YJ, Yang Q, Zhang K, Guo YY, Li XB, Yang L, Zhao MG, Wu YM. Cytisine confers neuronal protection against excitotoxic injury by down-regulating GluN2B-containing NMDA receptors. Neurotoxicology 2013; 34:219-25. [DOI: 10.1016/j.neuro.2012.09.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2012] [Revised: 09/08/2012] [Accepted: 09/18/2012] [Indexed: 11/15/2022]
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Dexamethasone induces different morphological changes in the dorsal and ventral hippocampus of rats. J Chem Neuroanat 2013; 47:71-8. [DOI: 10.1016/j.jchemneu.2012.12.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Revised: 12/14/2012] [Accepted: 12/17/2012] [Indexed: 01/12/2023]
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Gupta R, Palchaudhuri S, Chattopadhyay D. Glutamate induces neutrophil cell migration by activating class I metabotropic glutamate receptors. Amino Acids 2012; 44:757-67. [DOI: 10.1007/s00726-012-1400-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2012] [Accepted: 09/05/2012] [Indexed: 12/11/2022]
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Borgens RB, Liu-Snyder P. Understanding secondary injury. QUARTERLY REVIEW OF BIOLOGY 2012; 87:89-127. [PMID: 22696939 DOI: 10.1086/665457] [Citation(s) in RCA: 137] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Secondary injury is a term applied to the destructive and self-propagating biological changes in cells and tissues that lead to their dysfunction or death over hours to weeks after the initial insult (the "primary injury"). In most contexts, the initial injury is usually mechanical. The more destructive phase of secondary injury is, however, more responsible for cell death and functional deficits. This subject is described and reviewed differently in the literature. To biomedical researchers, systemic and tissue-level changes such as hemorrhage, edema, and ischemia usually define this subject. To cell and molecular biologists, "secondary injury" refers to a series of predominately molecular events and an increasingly restricted set of aberrant biochemical pathways and products. These biochemical and ionic changes are seen to lead to death of the initially compromised cells and "healthy" cells nearby through necrosis or apoptosis. This latter process is called "bystander damage." These viewpoints have largely dominated the recent literature, especially in studies of the central nervous system (CNS), often without attempts to place the molecular events in the context of progressive systemic and tissue-level changes. Here we provide a more comprehensive and inclusive discussion of this topic.
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Affiliation(s)
- Richard Ben Borgens
- Center for Paralysis Research, School of Veterinary Medicine, Department of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, USA.
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Investigation on quantitative structure activity relationships and pharmacophore modeling of a series of mGluR2 antagonists. Int J Mol Sci 2011; 12:5999-6023. [PMID: 22016641 PMCID: PMC3189765 DOI: 10.3390/ijms12095999] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 09/01/2011] [Accepted: 09/09/2011] [Indexed: 11/30/2022] Open
Abstract
MGluR2 is G protein-coupled receptor that is targeted for diseases like anxiety, depression, Parkinson’s disease and schizophrenia. Herein, we report the three-dimensional quantitative structure–activity relationship (3D-QSAR) studies of a series of 1,3-dihydrobenzo[ b][1,4]diazepin-2-one derivatives as mGluR2 antagonists. Two series of models using two different activities of the antagonists against rat mGluR2, which has been shown to be very similar to the human mGluR2, (activity I: inhibition of [3H]-LY354740; activity II: mGluR2 (1S,3R)-ACPD inhibition of forskolin stimulated cAMP.) were derived from datasets composed of 137 and 69 molecules respectively. For activity I study, the best predictive model obtained from CoMFA analysis yielded a Q2 of 0.513, R2ncv of 0.868, R2pred = 0.876, while the CoMSIA model yielded a Q2 of 0.450, R2ncv = 0.899, R2pred = 0.735. For activity II study, CoMFA model yielded statistics of Q2 = 0.5, R2ncv = 0.715, R2pred = 0.723. These results prove the high predictability of the models. Furthermore, a combined analysis between the CoMFA, CoMSIA contour maps shows that: (1) Bulky substituents in R7, R3 and position A benefit activity I of the antagonists, but decrease it when projected in R8 and position B; (2) Hydrophilic groups at position A and B increase both antagonistic activity I and II; (3) Electrostatic field plays an essential rule in the variance of activity II. In search for more potent mGluR2 antagonists, two pharmacophore models were developed separately for the two activities. The first model reveals six pharmacophoric features, namely an aromatic center, two hydrophobic centers, an H-donor atom, an H-acceptor atom and an H-donor site. The second model shares all features of the first one and has an additional acceptor site, a positive N and an aromatic center. These models can be used as guidance for the development of new mGluR2 antagonists of high activity and selectivity. This work is the first report on 3D-QSAR modeling of these mGluR2 antagonists. All the conclusions may lead to a better understanding of the mechanism of antagonism and be helpful in the design of new potent mGluR2 antagonists.
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Li MH, Inoue K, Si HF, Xiong ZG. Calcium-permeable ion channels involved in glutamate receptor-independent ischemic brain injury. Acta Pharmacol Sin 2011; 32:734-40. [PMID: 21552295 DOI: 10.1038/aps.2011.47] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Brain ischemia is a leading cause of death and long-term disabilities worldwide. Unfortunately, current treatment is limited to thrombolysis, which has limited success and a potential side effect of intracerebral hemorrhage. Searching for new cell injury mechanisms and therapeutic interventions has become a major challenge in the field. It has been recognized for many years that intracellular Ca(2+) overload in neurons is essential for neuronal injury associated with brain ischemia. However, the exact pathway(s) underlying the toxic Ca(2+) loading remained elusive. This review discusses the role of two Ca(2+)-permeable cation channels, TRPM7 and acid-sensing channels, in glutamate-independent Ca(2+) toxicity associated with brain ischemia.
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Limitations of PET and lesion studies in defining the role of the human cerebellum in motor learning. Behav Brain Sci 2011. [DOI: 10.1017/s0140525x00081899] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Eyeblink conditioning, motor control, and the analysis of limbic-cerebellar interactions. Behav Brain Sci 2011. [DOI: 10.1017/s0140525x00081929] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Grasping cerebellar function depends on our understanding the principles of sensorimotor integration: The frame of reference hypothesis. Behav Brain Sci 2011. [DOI: 10.1017/s0140525x00081607] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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36
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Dysmetria of thought: Correlations and conundrums in the relationship between the cerebellum, learning, and cognitive processing. Behav Brain Sci 2011. [DOI: 10.1017/s0140525x00081851] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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39
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Q: Is the cerebellum an adaptive combiner of motor and mental/motor activities? A: Yes, maybe, certainly not, who can say? Behav Brain Sci 2011. [DOI: 10.1017/s0140525x00082017] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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40
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What behavioral benefit does stiffness control have? An elaboration of Smith's proposal. Behav Brain Sci 2011. [DOI: 10.1017/s0140525x00081917] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Mao QQ, Zhong XM, Feng CR, Pan AJ, Li ZY, Huang Z. Protective effects of paeoniflorin against glutamate-induced neurotoxicity in PC12 cells via antioxidant mechanisms and Ca(2+) antagonism. Cell Mol Neurobiol 2010; 30:1059-66. [PMID: 20577899 DOI: 10.1007/s10571-010-9537-5] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Accepted: 06/10/2010] [Indexed: 02/07/2023]
Abstract
Preclinical and clinical investigations have shown hippocampal neuronal atrophy and destruction were observed in patients with depression, which could be ameliorated by the treatment with antidepressants. Therefore, neuroprotection has been proposed to be one of the acting mechanisms of antidepressant. Paeoniflorin, a monoterpene glycoside, has been reported to display antidepressant-like effects in animal models of behavioral despair. The present study aimed to examine the protective effect of paeoniflorin on glutamate-induced neurotoxicity in cultured rat pheochromocytoma (PC12) cells. The results showed that pretreatment with paeoniflorin elevated cell viability, inhibited apoptosis, decreased levels of intracellular reactive oxygen species and malondialdehyde, and enhanced activity of superoxide dismutase in glutamate-treated PC12 cells. Pretreatment with paeoniflorin also reversed the increased intracellular Ca(2+) concentration and the reduced Calbindin-D28K mRNA level caused by glutamate in PC12 cells. The results suggest that paeoniflorin exerts a neuroprotective effect on glutamate-induced neurotoxicity in PC12 cells, at least in part, via inhibiting oxidative stress and Ca(2+) overload. This neuroprotective effect may be one of the action pathways accounting for the in vivo antidepressant activity of paeoniflorin.
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Affiliation(s)
- Qing-Qiu Mao
- School of Chinese Medicine, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
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Changes of AMPA receptors in MPTP monkeys with levodopa-induced dyskinesias. Neuroscience 2010; 167:1160-7. [PMID: 20303391 DOI: 10.1016/j.neuroscience.2010.03.022] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2009] [Revised: 03/10/2010] [Accepted: 03/10/2010] [Indexed: 11/22/2022]
Abstract
Overactivity of glutamate neurotransmission is suspected to be implicated in Parkinson's disease and levodopa-induced dyskinesia. The fast glutamatergic transmission in the striatum from the cortex is mediated mainly by non-n-methyl-d-aspartate (non-NMDA) receptors. Animal models of Parkinson's disease reveal conflicting data concerning striatal glutamate AMPA receptors. The present study thus sought to shed light on the relationship of striatal AMPA receptors to the development of levodopa-induced dyskinesia. [(3)H]Ro 48-8587, a highly potent and selective-specific antagonist ligand for AMPA receptors, was used to investigate, by autoradiography, striatal AMPA receptors in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-lesioned monkeys treated for 1 month with levodopa alone, levodopa+CI-1041 (NMDA receptor antagonist) or levodopa+cabergoline (D2 receptor agonist). Levodopa-treated MPTP monkeys developed dyskinesias while those that received levodopa+CI-1041 or levodopa+cabergoline did not. In the anterior caudate nucleus and putamen, specific binding of [(3)H]Ro 48-8587 was reduced in all MPTP-treated monkeys compared to control monkeys, but no significant effect of MPTP was measured in the posterior striatum. In dyskinetic monkeys, specific binding of [(3)H]Ro 48-8587 was elevated in subregions of the posterior caudate nucleus and putamen as compared to saline-treated MPTP monkeys. Levodopa+CI-1041 treatment left unchanged specific binding of [(3)H]Ro 48-8587 whereas levodopa+cabergoline treatment reduced it in subregions of the posterior caudate nucleus and putamen compared to control and levodopa-treated MPTP monkeys. Specific binding of [(3)H]Ro 48-8587 was low in the globus pallidus and remained unchanged following both lesion and treatments. In conclusion, the elevated values of AMPA receptors in dyskinetic monkeys (and their prevention through treatments) were only observed in subregions of the striatum.
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Han I, You Y, Kordower JH, Brady ST, Morfini GA. Differential vulnerability of neurons in Huntington's disease: the role of cell type-specific features. J Neurochem 2010; 113:1073-91. [PMID: 20236390 DOI: 10.1111/j.1471-4159.2010.06672.x] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Abnormal expansion of a polyglutamine tract in huntingtin (Htt) protein results in Huntington's disease (HD), an autosomal dominant neurodegenerative disorder involving progressive loss of motor and cognitive function. Contrasting with the ubiquitous tissue expression of polyglutamine-expanded Htt, HD pathology is characterized by the increased vulnerability of specific neuronal populations within the striatum and the cerebral cortex. Morphological, biochemical, and functional characteristics of neurons affected in HD that might render these cells more vulnerable to the toxic effects of polyglutamine-Htt are covered in this review. The differential vulnerability of neurons observed in HD is discussed in the context of various major pathogenic mechanisms proposed to date, and in line with evidence showing a 'dying-back' pattern of degeneration in affected neuronal populations.
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Affiliation(s)
- Ina Han
- Department of Anatomy and Cell Biology. University of Illinois at Chicago, Chicago, Illinois 60612, USA
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Gu B, Nakamichi N, Zhang WS, Nakamura Y, Kambe Y, Fukumori R, Takuma K, Yamada K, Takarada T, Taniura H, Yoneda Y. Possible protection by notoginsenoside R1 against glutamate neurotoxicity mediated by N-methyl-D-aspartate receptors composed of an NR1/NR2B subunit assembly. J Neurosci Res 2009; 87:2145-56. [PMID: 19224577 DOI: 10.1002/jnr.22021] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Notoginsenoside R1 (NTR1) is the main active ingredient in Panax notoginseng, a herbal medicine widely used in Asia for years. The purpose of this study was to investigate pharmacological properties of NTR1 on neurotoxicity of glutamate (Glu) in primary cultured mouse cortical neurons along with its possible mechanism of action. We found that NTR1 significantly protected neurons from the loss of cellular viability caused by brief exposure to 10 microM Glu for 1 hr in a dose-dependent manner at concentrations from 0.1 to 10 microM, without affecting the viability alone. NTR1 significantly inhibited the increased number of cells positive to propidium iodide (PI) staining, increase of intracellular free Ca(2+) ions, overproduction of intracellular reactive oxygen species, and depolarization of mitochondrial membrane potential in cultured neurons exposed to Glu, in addition to blocking decreased Bcl-2 and increased Bax expression levels. We further evaluated the target site at which NTR1 protects neurons from Glu toxicity by using the acquired expression strategy of N-methyl-D-aspartate (NMDA) receptor subunits in human embryonic kidney 293 cells. We found that 10 microM NTR1 protected NR1/NR2B subunit expressing cells from cell death by 100 microM NMDA, but not cells expressing NR1/NR2A subunits, when determined by PI staining. These results suggest that NTR1 may preferentially protect neurons from Glu excitotoxicity mediated by NMDA receptor composed of an NR1/NR2B subunit assembly in the brain.
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Affiliation(s)
- Bin Gu
- Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Natural Science and Technology, Kanazawa, Japan
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Lin LH. Glutamatergic neurons say NO in the nucleus tractus solitarii. J Chem Neuroanat 2009; 38:154-65. [PMID: 19778681 DOI: 10.1016/j.jchemneu.2009.02.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2008] [Revised: 02/06/2009] [Accepted: 02/09/2009] [Indexed: 01/13/2023]
Abstract
Both glutamate and nitric oxide (NO) may play an important role in cardiovascular reflex and respiratory signal transmission in the nucleus tractus solitarii (NTS). Pharmacological and physiological data have shown that glutamate and NO may be linked in mediating cardiovascular regulation by the NTS. Through tract tracing, multiple-label immunofluorescent staining, confocal microscopic, and electronic microscopic methods, we and other investigators have provided anatomical evidence that supports a role for glutamate and NO as well as an interaction between glutamate and NO in cardiovascular regulation in the NTS. This review article focuses on summarizing and discussing these anatomical findings. We utilized antibodies to markers of glutamatergic neurons and to neuronal NO synthase (nNOS), the enzyme that synthesizes NO in NTS neurons, to study the anatomical relationship between glutamate and NO in rats. Not only were glutamatergic markers and nNOS both found in similar subregions of the NTS and in vagal afferents, they were also frequently colocalized in the same neurons and fibers in the NTS. In addition, glutamatergic markers and nNOS were often present in fibers that were in close apposition to each other. Furthermore, N-methyl-d-aspartate (NMDA) type glutamate receptors and nNOS were often found on the same NTS neurons. Similarly, alpha-amino-3-hydroxy-5-methylisoxozole-proprionic acid (AMPA) type glutamate receptors also frequently colocalized with nNOS in NTS neurons. These findings support the suggestion that the interaction between glutamate and NO may be mediated both through NMDA and AMPA receptors. Finally, by applying tracer to the cut aortic depressor nerve (ADN) to identify nodose ganglion (NG) neurons that transmit cardiovascular signals to the NTS, we observed colocalization of vesicular glutamate transporters (VGluT) and nNOS in the ADN neurons. Thus, taken together, these neuroanatomical data support the hypothesis that glutamate and NO may interact with each other to regulate cardiovascular and likely other visceral functions through the NTS.
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Affiliation(s)
- Li-Hsien Lin
- Department of Neurology, University of Iowa, Iowa City, IA 52242, USA.
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Hong CH, Lee HY, Jin MH, Noh JY, Lee BH, Han SW. The effect of intravesical electrical stimulation on bladder function and synaptic neurotransmission in the rat spinal cord after spinal cord injury. BJU Int 2008; 103:1136-41. [PMID: 19021629 DOI: 10.1111/j.1464-410x.2008.08189.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To investigate the effects of intravesical electrical stimulation (IVES) on bladder function and synaptic neurotransmission in the lumbosacral spinal cord in the spinalized rat, as the clinical benefits of IVES in patients with increased residual urine or reduced bladder capacity have been reported but studies on the mechanism of IVES have mainly focused on bladder A delta afferents in central nervous system-intact rats. MATERIALS AND METHODS In all, 30 female Sprague-Dawley rats were divided equally into three groups: normal control rats, sham-stimulated spinalized rats and IVES-treated spinalized rats. IVES was started 5 weeks after spinal cord injury (SCI) and was performed 20 min a day for 5 consecutive days. At 7 days after IVES, conscious filling cystometry was performed. Sections from the L6 and S1 spinal cord segments were examined for n-methyl-d-aspartic acid receptor 1 (NMDAR1) subunit and gamma-aminobutyric acid (GABA) immunoactivity. RESULTS In IVES-treated spinalized rats, the number and maximal pressure of nonvoiding detrusor contractions were significantly less than in sham-stimulated spinalized rats. The mean maximal voiding pressure was also lower in IVES-treated than in sham-stimulated spinalized rats. IVES significantly reduced the interval between voiding contractions compared with the untreated spinalized rats. There was an overall increase in NMDAR1 immunoactivity after SCI, which was significantly lower in IVES-treated spinalized rats. Immunoactivity of GABA after SCI was significantly lower than in the control group and was significantly higher in IVES-treated spinalized rats. CONCLUSION Our results suggest that IVES might affect voiding contractions in addition to inhibiting C-fibre activity and that IVES seems to have a more complex effect on the bladder control pathway. For synaptic neurotransmission in the spinal cord, IVES could possibly shift the balance between excitation and inhibition towards inhibition.
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Affiliation(s)
- Chang Hee Hong
- Departments of Urology, Yonsei University College of Medicine, Seoul, Korea
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Loring RH. The Molecular Basis of Curaremimetic Snake Neurotoxin Specificity for Neuronal Nicotinic Receptor Subtypes. ACTA ACUST UNITED AC 2008. [DOI: 10.3109/15569549309033109] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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50
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Arce CA, Casale CH, Barra HS. Submembraneous microtubule cytoskeleton: regulation of ATPases by interaction with acetylated tubulin. FEBS J 2008; 275:4664-74. [DOI: 10.1111/j.1742-4658.2008.06615.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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