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Yan J, Ton H, Yan J, Dong Y, Xie Z, Jiang H. Anesthetic Sevoflurane Induces Enlargement of Dendritic Spine Heads in Mouse Neurons via Tau-Dependent Mechanisms. Anesth Analg 2024:00000539-990000000-00796. [PMID: 38507523 DOI: 10.1213/ane.0000000000006941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
BACKGROUND Sevoflurane induces neuronal dysfunction and cognitive impairment. However, the underlying mechanism remains largely to be determined. Tau, cyclophilin D, and dendritic spine contribute to cognitive function. But whether changes in dendritic spines are involved in the effects of sevoflurane and the potential association with tau and cyclophilin D is not clear. METHODS We harvested hippocampal neurons from wild-type mice, tau knockout mice, and cyclophilin D knockout mice. We treated these neurons with sevoflurane at day in vitro 7 and measured the diameter of dendritic spine head and the number of dendritic spines. Moreover, we determined the effects of sevoflurane on the expression of excitatory amino acid transporter 3 (EAAT3), extracellular glutamate levels, and miniature excitatory postsynaptic currents (mEPSCs). Finally, we used lithium, cyclosporine A, and overexpression of EAAT3 in the interaction studies. RESULTS Sevoflurane-induced tau phosphgorylation increased the diameter of dendritic spine head and decreased the number of dendritic spines in neurons harvested from wild-type and cyclophilin D knockout mice, but not tau knockout mice. Sevoflurane decreased the expression of EAAT3, increased extracellular glutamate levels, and decreased the frequency of mEPSCs in the neurons. Overexpression of EAAT3 mitigated the effects of sevoflurane on dendritic spines. Lithium, but not cyclosporine A, attenuated the effects of sevoflurane on dendritic spines. Lithium also inhibited the effects of sevoflurane on EAAT3 expression and mEPSCs. CONCLUSIONS These data suggest that sevoflurane induces a tau phosphorylation-dependent demtrimental effect on dendritic spine via decreasing EAAT3 expression and increasing extracellular glutamate levels, leading to neuronal dysfunction.
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Affiliation(s)
- Jia Yan
- From the Department of Anesthesiology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts
| | - Hoai Ton
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts
| | - Jing Yan
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuanlin Dong
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts
| | - Zhongcong Xie
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts
| | - Hong Jiang
- From the Department of Anesthesiology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Huang B, Liang S, Li X, Xie Z, Yang R, Sun B, Xue J, Li B, Wang S, Shi H, Shi Y. Postweaning intermittent sleep deprivation enhances defensive attack in adult female mice via the microbiota-gut-brain axis. Prog Neuropsychopharmacol Biol Psychiatry 2024; 130:110915. [PMID: 38104921 DOI: 10.1016/j.pnpbp.2023.110915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 12/12/2023] [Indexed: 12/19/2023]
Abstract
Sleep is one of the most important physiological activities in life and promotes the growth and development of an individual. In modern society, sleep deprivation (SD), especially among adolescents, has become a common phenomenon. However, long-term SD severely affected adolescents' neurodevelopment leading to abnormal behavioral phenotypes. Clinical studies indicated that sleep problems caused increased aggressive behavior in adolescents. Aggressive behavior was subordinate to social behaviors, in which defensive attack was often the last line for survival. Meanwhile, increasing studies shown that gut microbiota regulated social behaviors by affecting specific brain regions via the gut-brain axis. However, whether postweaning intermittent SD is related to defensive attack in adulthood, and if so, whether it is mediated by the microbiota-gut-brain axis are still elusive. Combined with microbial sequencing and hippocampal metabolomics, the present study mainly investigated the long-term effects of postweaning intermittent SD on defensive attack in adult mice. Our study demonstrated that postweaning intermittent SD enhanced defensive attack and impaired long-term memory formation in adult female mice. Moreover, microbial sequencing and LC-MS analysis showed that postweaning intermittent SD altered the gut microbial composition and the hippocampal metabolic profile in female mice, respectively. Our attention has been drawn to the neuroactive ligand-receptor interaction pathway and related metabolites. In conclusion, our findings provide a new perspective on the relationship of early-life SD and defensive attack in adulthood, and also highlight the importance of sleep in early-life, especially in females.
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Affiliation(s)
- Boya Huang
- Neuroscience Research Center, Institute of Medical and Health Science, Hebei Medical University, Shijiazhuang 050017, China; Hebei Key Laboratory of Forensic Medicine, Hebei Medicinal University, Shijiazhuang 050017, China; Graduate School, Tianjin Medical University, Tianjin 300070, China
| | - Shihao Liang
- Neuroscience Research Center, Institute of Medical and Health Science, Hebei Medical University, Shijiazhuang 050017, China; Hebei Key Laboratory of Forensic Medicine, Hebei Medicinal University, Shijiazhuang 050017, China
| | - Xinrui Li
- Neuroscience Research Center, Institute of Medical and Health Science, Hebei Medical University, Shijiazhuang 050017, China; Hebei Key Laboratory of Forensic Medicine, Hebei Medicinal University, Shijiazhuang 050017, China
| | - Ziyu Xie
- Neuroscience Research Center, Institute of Medical and Health Science, Hebei Medical University, Shijiazhuang 050017, China
| | - Rui Yang
- Neuroscience Research Center, Institute of Medical and Health Science, Hebei Medical University, Shijiazhuang 050017, China; Hebei Key Laboratory of Forensic Medicine, Hebei Medicinal University, Shijiazhuang 050017, China
| | - Binhuang Sun
- Neuroscience Research Center, Institute of Medical and Health Science, Hebei Medical University, Shijiazhuang 050017, China; Hebei Key Laboratory of Forensic Medicine, Hebei Medicinal University, Shijiazhuang 050017, China
| | - Jiping Xue
- Neuroscience Research Center, Institute of Medical and Health Science, Hebei Medical University, Shijiazhuang 050017, China
| | - Bingyu Li
- Neuroscience Research Center, Institute of Medical and Health Science, Hebei Medical University, Shijiazhuang 050017, China
| | - Sheng Wang
- Hebei Key Laboratory of Forensic Medicine, Hebei Medicinal University, Shijiazhuang 050017, China
| | - Haishui Shi
- Neuroscience Research Center, Institute of Medical and Health Science, Hebei Medical University, Shijiazhuang 050017, China; Hebei Key Laboratory of Forensic Medicine, Hebei Medicinal University, Shijiazhuang 050017, China; Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang 050017, China; Nursing School, Hebei Medical University, Shijiazhuang 050031, China.
| | - Yun Shi
- Neuroscience Research Center, Institute of Medical and Health Science, Hebei Medical University, Shijiazhuang 050017, China; Department of Biochemistry and Molecular Biology, College of Basic Medicine, Hebei Medicinal University, Shijiazhuang 050017, China.
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Chegão A, Vicente Miranda H. Unveiling new secrets in Parkinson's disease: The glycatome. Behav Brain Res 2023; 442:114309. [PMID: 36706808 DOI: 10.1016/j.bbr.2023.114309] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 01/04/2023] [Accepted: 01/19/2023] [Indexed: 01/25/2023]
Abstract
We are witnessing a considerable increase in the incidence of Parkinson's disease (PD), which may be due to the general ageing of the population. While there is a plethora of therapeutic strategies for this disease, they still fail to arrest disease progression as they do not target and prevent the neurodegenerative process. The identification of disease-causing mutations allowed researchers to better dissect the underlying causes of this disease, highlighting, for example, the pathogenic role of alpha-synuclein. However, most PD cases are sporadic, which is making it hard to unveil the major causative mechanisms of this disease. In the recent years, epidemiological evidence suggest that type-2 diabetes mellitus (T2DM) individuals have higher risk and worst outcomes of PD, allowing to raise the hypothesis that some dysregulated processes in T2DM may contribute or even trigger the neurodegenerative process in PD. One major consequence of T2DM is the unprogrammed reaction between sugars, increased in T2DM, and proteins, a reaction named glycation. Pre-clinical reports show that alpha-synuclein is a target of glycation, and glycation potentiates its pathogenicity which contributes for the neurodegenerative process. Moreover, it triggers, anticipates, or aggravates several PD-like motor and non-motor complications. A given profile of proteins are differently glycated in diseased conditions, altering the brain proteome and leading to brain dysfunction and neurodegeneration. Herein we coin the term Glycatome as the profile of glycated proteins. In this review we report on the mechanisms underlying the association between T2DM and PD, with particular focus on the impact of protein glycation.
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Affiliation(s)
- Ana Chegão
- iNOVA4Health, NOVA Medical School, NMS, Universidade NOVA de Lisboa, Lisboa, Portugal
| | - Hugo Vicente Miranda
- iNOVA4Health, NOVA Medical School, NMS, Universidade NOVA de Lisboa, Lisboa, Portugal.
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Neonatal Isoflurane Exposure in Rats Impairs Short-Term Memory, Cell Viability, and Glutamate Uptake in Slices of the Frontal Cerebral Cortex, But Not the Hippocampus, in Adulthood. Neurotox Res 2022; 40:1924-1936. [PMID: 36441450 DOI: 10.1007/s12640-022-00607-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/10/2022] [Accepted: 11/16/2022] [Indexed: 11/29/2022]
Abstract
Neonatal exposure to general anesthetics has been associated with neurotoxicity and morphologic changes in the developing brain. Isoflurane is a volatile anesthetic widely used in pediatric patients to induce general anesthesia, analgesia, and perioperative sedation. In the present study, we investigated the effects of a single neonatal isoflurane (3% in oxygen, 2 h) exposure in rats at postnatal day (PND) 7, in short-term (24 h - PND8) and long-term (adulthood) protocols. In PND8, ex vivo analysis of hippocampal and frontal cortex slices evaluated cell viability and susceptibility to in vitro glutamate challenge. In adult rats, behavioral parameters related to anxiety-like behavior, short-term memory, and locomotor activity (PND60-62) and ex vivo analysis of cell viability, membrane permeability, glutamate uptake, and susceptibility to in vitro glutamate challenge in hippocampal and cortical slices from PND65. A single isoflurane (3%, 2 h) exposure at PND7 did not acutely alter cell viability in cortical and hippocampal slices of infant rats (PND8) per se and did not alter slice susceptibility to in vitro glutamate challenge. In rat's adulthood, behavioral analysis revealed that the neonatal isoflurane exposure did not alter anxiety-like behavior and locomotor activity (open field and rotarod tests). However, isoflurane exposure impaired short-term memory evaluated in the novel object recognition task. Ex vivo analysis of brain slices showed isoflurane neonatal exposure selectively decreased cell viability and glutamate uptake in cortical slices, but it did not alter hippocampal slice viability or glutamate uptake (PND65). Isoflurane exposure did not alter in vitro glutamate-induced neurotoxicity to slices, and isoflurane exposure caused no significant long-term damage to cell membranes in hippocampal or cortical slices. These findings indicate that a single neonatal isoflurane exposure did not promote acute damage; however, it reduced cortical, but not hippocampal, slice viability and glutamate uptake in the adulthood. Additionally, behavioral analysis showed neonatal isoflurane exposure induces short-term recognition memory impairment, consolidating that neonatal exposure to volatile anesthetics may lead to behavioral impairment in the adulthood, although it may damage brain regions differentially.
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Yuan Y, Zhao Y, Shen M, Wang C, Dong B, Xie K, Yu Y, Yu Y. Spinal NLRP3 inflammasome activation mediates IL-1β release and contributes to remifentanil-induced postoperative hyperalgesia by regulating NMDA receptor NR1 subunit phosphorylation and GLT-1 expression in rats. Mol Pain 2022; 18:17448069221093016. [PMID: 35322721 PMCID: PMC9703502 DOI: 10.1177/17448069221093016] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Trafficking and activation of N-methyl-D-aspartate (NMDA) receptors play an important role in initiating and maintaining postoperative remifentanil-induced hyperalgesia (RIH). Activation of the NOD-like receptor protein 3 (NLRP3) inflammasome has been linked to the development of inflammatory and neuropathic pain. We hypothesized that activation of NLRP3 inflammasome mediates IL-1β release and contributes to RIH in rats by increasing NMDA receptor NR1 (NR1) subunit phosphorylation and decreasing glutamate transporter-1 (GLT-1) expression. METHODS Acute exposure to remifentanil (1.2 μg/kg/min for 60 min) was used to establish RIH in rats. Thermal and mechanical hyperalgesia were tested at baseline (24 h before remifentanil infusion) and 2, 6, 24, and 48 h after remifentanil infusion. The levels of IL-1β, GLT-1, phosphorylated NR1 (phospho-NR1), and NLRP3 inflammasome activation indicators [NLRP3, Toll-like receptor 4 (TLR4), P2X purinoceptor 7 (P2X7R), and caspase-1] were measured after the last behavioral test. A selective IL-1β inhibitor (IL-1β inhibitor antagonist; IL-1ra) or three different selective NLRP3 inflammasome activation inhibitors [(+)-naloxone (a TLR4 inhibitor), A438079 (a P2X7R inhibitor), or ac-YVADcmk (a caspase-1 inhibitor)] were intrathecally administered immediately before remifentanil infusion into rats. RESULTS Remifentanil induced significant postoperative hyperalgesia, increased IL-1β and phospho-NR1 levels and activated the NLRP3 inflammasome by increasing TLR4, P2X7R, NLRP3, and caspase-1 expression, but it decreased GLT-1 expression in the L4-L6 spinal cord segments of rats, which was markedly improved by intrathecal administration of IL-1ra, (+)-naloxone, A438079, or ac-YVADcmk. CONCLUSION NLRP3 inflammasome activation mediates IL-1β release and contributes to RIH in rats by inducing NMDA receptor NR1 subunit phosphorylation and decreasing GLT-1 expression. Inhibiting the activation of the NLRP3 inflammasome may be an effective treatment for RIH.
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Affiliation(s)
- Yuan Yuan
- Department of Anesthesia, Tianjin Medical University General Hospital, Tianjin, China,Tianjin Institute of Anesthesiology, Tianjin, P.R. China
| | - Yue Zhao
- Department of Anesthesia, Tianjin Medical University General Hospital, Tianjin, China,Tianjin Institute of Anesthesiology, Tianjin, P.R. China
| | - Mengxi Shen
- Department of Anesthesia, Tianjin Medical University General Hospital, Tianjin, China,Tianjin Institute of Anesthesiology, Tianjin, P.R. China
| | - Chenxu Wang
- Department of Anesthesia, Tianjin Medical University General Hospital, Tianjin, China,Tianjin Institute of Anesthesiology, Tianjin, P.R. China
| | - Beibei Dong
- Department of Anesthesia, Tianjin Medical University General Hospital, Tianjin, China,Tianjin Institute of Anesthesiology, Tianjin, P.R. China
| | - Keliang Xie
- Department of Anesthesia, Tianjin Medical University General Hospital, Tianjin, China,Tianjin Institute of Anesthesiology, Tianjin, P.R. China
| | - Yang Yu
- Department of Anesthesia, Tianjin Medical University General Hospital, Tianjin, China,Tianjin Institute of Anesthesiology, Tianjin, P.R. China,Yang Yu, Department of Anesthesia, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin 300052, P.R. China.
| | - Yonghao Yu
- Department of Anesthesia, Tianjin Medical University General Hospital, Tianjin, China,Tianjin Institute of Anesthesiology, Tianjin, P.R. China,Yonghao Yu, Department of Anesthesia, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin 300052, P.R. China.
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Glycation modulates glutamatergic signaling and exacerbates Parkinson's disease-like phenotypes. NPJ Parkinsons Dis 2022; 8:51. [PMID: 35468899 PMCID: PMC9038780 DOI: 10.1038/s41531-022-00314-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 03/31/2022] [Indexed: 01/17/2023] Open
Abstract
Alpha-synuclein (aSyn) is a central player in the pathogenesis of synucleinopathies due to its accumulation in typical protein aggregates in the brain. However, it is still unclear how it contributes to neurodegeneration. Type-2 diabetes mellitus is a risk factor for Parkinson's disease (PD). Interestingly, a common molecular alteration among these disorders is the age-associated increase in protein glycation. We hypothesized that glycation-induced neuronal dysfunction is a contributing factor in synucleinopathies. Here, we dissected the impact of methylglyoxal (MGO, a glycating agent) in mice overexpressing aSyn in the brain. We found that MGO-glycation potentiates motor, cognitive, olfactory, and colonic dysfunction in aSyn transgenic (Thy1-aSyn) mice that received a single dose of MGO via intracerebroventricular injection. aSyn accumulates in the midbrain, striatum, and prefrontal cortex, and protein glycation is increased in the cerebellum and midbrain. SWATH mass spectrometry analysis, used to quantify changes in the brain proteome, revealed that MGO mainly increase glutamatergic-associated proteins in the midbrain (NMDA, AMPA, glutaminase, VGLUT and EAAT1), but not in the prefrontal cortex, where it mainly affects the electron transport chain. The glycated proteins in the midbrain of MGO-injected Thy1-aSyn mice strongly correlate with PD and dopaminergic pathways. Overall, we demonstrated that MGO-induced glycation accelerates PD-like sensorimotor and cognitive alterations and suggest that the increase of glutamatergic signaling may underly these events. Our study sheds new light into the enhanced vulnerability of the midbrain in PD-related synaptic dysfunction and suggests that glycation suppressors and anti-glutamatergic drugs may hold promise as disease-modifying therapies for synucleinopathies.
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Zhang Y, Chu JMT, Wong GTC. Cerebral Glutamate Regulation and Receptor Changes in Perioperative Neuroinflammation and Cognitive Dysfunction. Biomolecules 2022; 12:biom12040597. [PMID: 35454185 PMCID: PMC9029551 DOI: 10.3390/biom12040597] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 04/11/2022] [Accepted: 04/15/2022] [Indexed: 12/23/2022] Open
Abstract
Glutamate is the major excitatory neurotransmitter in the central nervous system and is intricately linked to learning and memory. Its activity depends on the expression of AMPA and NMDA receptors and excitatory amino transporters on neurons and glial cells. Glutamate transporters prevent the excess accumulation of glutamate in synapses, which can lead to aberrant synaptic signaling, excitotoxicity, or cell death. Neuroinflammation can occur acutely after surgical trauma and contributes to the development of perioperative neurocognitive disorders, which are characterized by impairment in multiple cognitive domains. In this review, we aim to examine how glutamate handling and glutamatergic function are affected by neuroinflammation and their contribution to cognitive impairment. We will first summarize the current data regarding glutamate in neurotransmission, its receptors, and their regulation and trafficking. We will then examine the impact of inflammation on glutamate handling and neurotransmission, focusing on changes in glial cells and the effect of cytokines. Finally, we will discuss these changes in the context of perioperative neuroinflammation and the implications they have for perioperative neurocognitive disorders.
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Sümer Coşkun A, Bedel HA, Munzuroğlu M, Derin N, Usta C. Does Resveratrol Prevent Sevoflurane Toxicity in Newborn Rats? J Med Food 2022; 25:557-563. [PMID: 35420459 DOI: 10.1089/jmf.2021.0154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Inhalation anesthetics have been shown to cause neurodevelopmental disorders and neurotoxic effects. In this study, we aimed to investigate the effect of resveratrol on the possible neurotoxic effect of sevoflurane and the brain-derived neurotrophic factor (BDNF) pathway in newborn rats. The animals were divided into four groups: control, sevoflurane, sevoflurane+resveratrol 25 mg/kg, and sevoflurane+resveratrol 50 mg/kg. The groups that received anesthesia were given 3% sevoflurane for 2 h on the postnatal seventh, eighth, and ninth days. Control gas was applied to the control group. The Morris water maze (MWM) test was performed on postnatal 35th day. After performing the open field test on the postnatal 41st day, the animals were dissected, and the hippocampal BDNF levels were determined by Western blot method. In the MWM test, there was a significant decrease in the time spent in the target quadrant in the sevoflurane anesthesia group compared with control group. This reduction was reversed with the resveratrol pretreatment. Sevoflurane exposure significantly decreased hippocampal BDNF levels compared with the control group. The resveratrol 25 mg/kg pretreatment did not reverse this reduction, whereas resveratrol 50 mg/kg ameliorated this impairment. Sevoflurane did not cause any significant difference in the rats' performance in the open field test. However, 50 mg/kg resveratrol pretreatment caused a statistically significant increase in this performance. Our results showed that sevoflurane impaired learning and memory functions in newborn rats and resveratrol reversed this deterioration. Also BDNF might play a role in this beneficial effect of resveratrol.
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Affiliation(s)
| | - Hatice Aslı Bedel
- Pharmacology Department, Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Mustafa Munzuroğlu
- Biophysics Department, Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Narin Derin
- Biophysics Department, Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Coşkun Usta
- Pharmacology Department, Akdeniz University Faculty of Medicine, Antalya, Turkey
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He T, Li N, Shi P, Xu X, Nie J, Lu X, Yu P, Fan Y, Ge F, Guan X. Electroacupuncture alleviates spatial memory deficits in METH withdrawal mice by enhancing astrocyte-mediated glutamate clearance in the dCA1. Addict Biol 2022; 27:e13068. [PMID: 34128302 DOI: 10.1111/adb.13068] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 04/03/2021] [Accepted: 05/17/2021] [Indexed: 02/06/2023]
Abstract
Methamphetamine (METH) elicits endogenous glutamate (Glu) in the brain, which could partially explain METH-induced memory deficits. Here, we investigated the therapeutic effects of electroacupuncture (EA) on spatial memory deficits in METH withdrawal mice and its potential synaptic mechanisms. We found that EA at acupoints 'Baihui' and 'Yintang' ameliorated the impaired spatial memory in METH withdrawal mice. In parallel, EA attenuated the Glu levels in vivo and suppressed the neuronal activities within dCA1 of METH withdrawal mice, as indicated by the decreasing c-Fos levels and the amplitude of mEPSP. In the dCA1, EA decreased A1-like astrocytes but increased astrocytic glutamatergic transporting molecules including glutamate transporter 1 and glutamine synthase. However, EA seemed to have no effects on presynaptic Glu transmission from the dCA3, as evidenced by the similiar levels of c-Fos in the dCA3 neurons, synaptic vesicular markers of dCA3 neural terminals and values of paired-pulse ratio in the dCA1 neurons between EA-treated and sham EA-treated METH withdrawal mice. These findings suggest that EA might normalize the dCA1 Glu levels at least in part through enhancing astrocyte-mediated Glu clearance. Taken together, astrocytes might be a novel target for developing therapeutic interventions against the impaired memory behaviours in METH users, and EA represents a promising non-invasive therapeutic strategy for the management of drug-caused memory deficits.
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Affiliation(s)
- Teng He
- Department of Human Anatomy and Histoembryology Nanjing University of Chinese Medicine Nanjing China
| | - Nanqin Li
- Department of Human Anatomy and Histoembryology Nanjing University of Chinese Medicine Nanjing China
| | - Pengbo Shi
- Department of Orthopedics The First Affiliated Hospital of Henan University of Chinese Medicine Zhengzhou China
| | - Xing Xu
- Department of Human Anatomy and Histoembryology Nanjing University of Chinese Medicine Nanjing China
| | - Jiaxun Nie
- Department of Human Anatomy and Histoembryology Nanjing University of Chinese Medicine Nanjing China
| | - Xue Lu
- Department of Human Anatomy and Histoembryology Nanjing University of Chinese Medicine Nanjing China
| | - Peiyao Yu
- Department of Human Anatomy and Histoembryology Nanjing University of Chinese Medicine Nanjing China
| | - Yu Fan
- Department of Human Anatomy and Histoembryology Nanjing University of Chinese Medicine Nanjing China
- Department of Physiology, College of Korean Medicine Daegu Haany University Gyeongsan South Korea
| | - Feifei Ge
- Department of Human Anatomy and Histoembryology Nanjing University of Chinese Medicine Nanjing China
| | - Xiaowei Guan
- Department of Human Anatomy and Histoembryology Nanjing University of Chinese Medicine Nanjing China
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Ozkan A, Aslan MA, Sinen O, Munzuroglu M, Derin N, Parlak H, Bulbul M, Agar A. Effects of adropin on learning and memory in rats tested in the Morris water maze. Hippocampus 2021; 32:253-263. [PMID: 34971006 DOI: 10.1002/hipo.23403] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 11/19/2021] [Accepted: 12/20/2021] [Indexed: 11/06/2022]
Abstract
Adropin is a secreted peptide, which is composed of 43 amino acids and shows an effective role in regulating energy metabolism and insulin resistance. Motor coordination and locomotor activity were improved by adropin in the cerebellum. However, it is not known whether adropin administration has an effect on spatial learning and memory. In this study, we investigated the effect of adropin on spatial learning and memory and characterized the biochemical properties of adropin in the hippocampus. Thirty male Sprague-Dawley rats were randomly divided into two groups as control and adropin groups. The control group received 0.9% NaCl intracerebroventricular for 6 days, while the adropin groups received 1 nmol of adropin dissolved in 0.9% NaCl (for 6 days). The Morris water maze, Y maze, and object location recognition tests were performed to evaluate learning and memory. Also, the locomotor activity tests were measured to assess the motor function. The expression of Akt, phospho-Akt, CREB, phospho-CREB, Erk1/2, phospho-Erk1/2, glycogen synthase kinase 3 β (GSK3β), phospho-GSK3β, brain-derived neurotrophic factor (BDNF), and N-methyl-d-aspartate receptor NR2B subunit were determined in the hippocampal tissues by using western blot. Behavior tests showed that adropin significantly increase spatial memory performance. Meanwhile, the western blot analyses revealed that the phosphorylated form of the Akt and CREB were enhanced with adropin administration in the hippocampus. Also, the expression of BDNF showed an enhancement in adropin group in comparison to the control group. In conclusion, we have shown for the first time that adropin exerts its enhancing effect on spatial memory capacity through Akt/CREB/BDNF signaling pathways.
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Affiliation(s)
- Ayse Ozkan
- Department of Physiology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Mutay Aydin Aslan
- Department of Medical Biochemistry, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Osman Sinen
- Department of Physiology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Mustafa Munzuroglu
- Department of Biophysics, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Narin Derin
- Department of Biophysics, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Hande Parlak
- Department of Physiology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Mehmet Bulbul
- Department of Physiology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Aysel Agar
- Department of Physiology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
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Wang HX, Chen Y, Haque Z, de Veer M, Egan G, Wang B. Sialylated milk oligosaccharides alter neurotransmitters and brain metabolites in piglets: an In vivo magnetic resonance spectroscopic (MRS) study. Nutr Neurosci 2021; 24:885-895. [PMID: 31746283 DOI: 10.1080/1028415x.2019.1691856] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Background: Human milk contains high concentrations and diversity of sialylated oligosaccharides that have multifunctional health benefits, however, their potential role in optimizing neurodevelopment remains unknown.Objective: To investigate the effect of sialylated milk oligosaccharides (SMOS) intervention on neurotransmitters and brain metabolites in piglets.Methods: 3-day-old piglets were randomly allocated to one of three groups and fed either standard sow milk replacer (SMR) alone (n = 15), SMR supplemented with sialyllactose 9.5 g/kg (SL, n = 16) or a combination of SL and 6'-sialyllactosamine 9.5 g/kg (SL/SLN, n = 15) for 35 days. Brain spectra were acquired using a 3T Magnetic Resonance Spectroscopic (MRS) system.Results: SMOS fed piglets were observed to have significantly increased the absolute levels of myo-inositol (mIns) and glutamate + glutamine (Glx), in particular, the SL/SLN group. Similar findings were found in the relative amount of these metabolites calculated as ratios to creatine (Cr), choline (Cho) and N-acetylaspartate (NAA) respectively (P < .05). In addition, there were significant positive correlations of brain NAA, total NAA (TNAA), mIns, total Cho (TCho), total Cr (TCr), scyllo-Inositol (SI) and glutathione (Glth) with total white matter volume; Glu and SI with whole brain volume; and SI with whole brain weight respectively (P < .01). SLN and 3'SL intake were closely correlated with the levels of brain Glu, mlns and Glx in the treatment groups only (P < .01-.05).Conclusions: We provide in vivo evidences that milk SMOS can alter many important brain metabolites and neurotransmitters required for optimizing neurodevelopment in piglets, an animal model of human infants.
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Affiliation(s)
- Hong Xin Wang
- Graham Centre for Agricultural Innovation, Charles Sturt University, Wagga Wagga, Australia
| | - Yue Chen
- Graham Centre for Agricultural Innovation, Charles Sturt University, Wagga Wagga, Australia
| | - Ziaul Haque
- Graham Centre for Agricultural Innovation, Charles Sturt University, Wagga Wagga, Australia
| | - Michael de Veer
- Monash Biomedical Imaging, Monash University, Melbourne, Australia
| | - Gary Egan
- Monash Biomedical Imaging, Monash University, Melbourne, Australia
| | - Bing Wang
- Graham Centre for Agricultural Innovation, Charles Sturt University, Wagga Wagga, Australia
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Desflurane and Surgery Exposure During Pregnancy Decrease Synaptic Integrity and Induce Functional Deficits in Juvenile Offspring Mice. Neurochem Res 2019; 45:418-427. [DOI: 10.1007/s11064-019-02932-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 11/06/2019] [Accepted: 12/12/2019] [Indexed: 12/27/2022]
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13
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Role of hydrogen sulfide in cognitive deficits: Evidences and mechanisms. Eur J Pharmacol 2019; 849:146-153. [DOI: 10.1016/j.ejphar.2019.01.072] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 01/11/2019] [Accepted: 01/17/2019] [Indexed: 11/23/2022]
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Antidotal effects of thymoquinone against neurotoxic agents. Interdiscip Toxicol 2019; 11:122-128. [PMID: 31719783 PMCID: PMC6829686 DOI: 10.2478/intox-2018-0008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 01/23/2018] [Indexed: 11/22/2022] Open
Abstract
Several plants which contain the active component thymoquinone (TQ) have been traditionally used in herbal medicine to treat various diseases. Several studies indicated the protective effects of TQ against neurotoxic agents. The present study was aimed to highlight the protective effects of TQ against neurotoxic agents. For this reason, the literature from 1998 to 2017 regarding the protective effects of TQ against neurotoxic agents and their involvement mechanisms has been studied. The present review suggests the protective effects of TQ against neurotoxic agents in experimental models. More clinical trial studies are however needed to confirm the antidotal effects of TQ in human intoxication.
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Wang X, Shan Y, Tang Z, Gao L, Liu H. Neuroprotective effects of dexmedetomidine against isoflurane-induced neuronal injury via glutamate regulation in neonatal rats. DRUG DESIGN DEVELOPMENT AND THERAPY 2018; 13:153-160. [PMID: 30613136 PMCID: PMC6306062 DOI: 10.2147/dddt.s163197] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Background Considerable evidences support the finding that the anesthesia reagent isoflurane increases neuronal cell death in young rats. Recent studies have shown that dexmedetomidine can reduce isoflurane-induced neuronal injury, but the mechanism remains unclear. We investigated whether isoflurane cause neurotoxicity to the central nervous system by regulating the N-methyl-D-aspartate receptor (NMDAR) and excitatory amino acid transporter1 (EAAT1) in young rats. Furthermore, we examined if dexmedetomidine could decrease isoflurane-induced neurotoxicity. Methods Neonatal rats (postnatal day 7, n=144) were randomly divided into four groups of 36 animals each: control (saline injection without isoflurane); isoflurane (2% for 4 h); isoflurane + single dose of dexmedetomidine (75 µg/kg, 20 min before the start of 2% isoflurane for 4 h); and isoflurane + dual doses of dexmedetomidine (25 µg/kg, 20 min before and 2 h after start of isoflurane at 2% for 4 h). Six neonates from each group were euthanatized at 2 h, 12 h, 24 h, 3 days, 7 days and 28 days post-anesthesia. Hippocampi were collected and processed for protein extraction. Expression levels of the NMDAR subunits NR2A and NR2B, EAAT1 and caspase-3 were measured by western blot analysis. Results Protein levels of NR2A, EAAT1 and caspase-3 were significantly increased in hippocampus of the isoflurane group from 2 h to 3 days, while NR2B levels were decreased. However, the -induced increase in NR2A, EAAT1 and caspase-3 and the decrease in NR2B in isoflurane-exposed rats were ameliorated in the rats treated with single or dual doses of dexmedetomidine. Isoflurane-induced neuronal damage in neonatal rats is due in part to the increase in NR2A and EAAT1 and the decrease in NR2B in the hippocampus. Conclusion Dexmedetomidine protects the brain against the use of isoflurane through the regulation of NR2A, NR2B and EAAT1. However, using the same amount of dexmedetomidine, the trend of protection is basically the same.
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Affiliation(s)
- Xue Wang
- Department of Anesthesiology, Shengjing Hospital, China Medical University, Shenyang 110004, China, .,Department of Anesthesiology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Sciences, Xiangyang 441000, China
| | - Yangyang Shan
- Department of Anesthesiology, Shengjing Hospital, China Medical University, Shenyang 110004, China,
| | - Zhiyin Tang
- Department of Anesthesiology, Shengjing Hospital, China Medical University, Shenyang 110004, China,
| | - Linlin Gao
- Department of Medical Research, Shengjing Hospital, China Medical University, Shenyang 110004, China
| | - Hongtao Liu
- Department of Anesthesiology, Shengjing Hospital, China Medical University, Shenyang 110004, China,
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Drugs to Alter Extracellular Concentration of Glutamate: Modulators of Glutamate Uptake Systems. ACTA ACUST UNITED AC 2017. [DOI: 10.1007/978-1-4939-7228-9_7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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17
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Abdel-Zaher AO, Farghaly HS, Farrag MM, Abdel-Rahman MS, Abdel-Wahab BA. A potential mechanism for the ameliorative effect of thymoquinone on pentylenetetrazole-induced kindling and cognitive impairments in mice. Biomed Pharmacother 2017; 88:553-561. [DOI: 10.1016/j.biopha.2017.01.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Revised: 12/28/2016] [Accepted: 01/02/2017] [Indexed: 02/01/2023] Open
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18
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Cascella M, Bimonte S. The role of general anesthetics and the mechanisms of hippocampal and extra-hippocampal dysfunctions in the genesis of postoperative cognitive dysfunction. Neural Regen Res 2017; 12:1780-1785. [PMID: 29239315 PMCID: PMC5745823 DOI: 10.4103/1673-5374.219032] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Postoperative cognitive dysfunction (POCD) is a multifactorial process with a huge number of predisposing, causal, and precipitating factors. In this scenario, the neuroinflammation and the microglial activation play a pivotal role by triggering and amplifying a complex cascade involving the immuno-hormonal activation, the micro circle alterations, the hippocampal oxidative stress activation and, finally, an increased blood-brain barrier's permeability. While the role of anesthetics in the POCD's genesis in humans is debated, a huge number of preclinical studies have been conducted on the topic and many mechanisms have been proposed to explain the potential neurodegenerative effects of general anesthetics. Probably, the problem concerns on what we are searching for and how we are searching and, surprisingly, preclinical studies showed that anesthetics may also manifest neuroprotective properties. The aim of this paper is to offer an overview on the potential impact of general anesthetics on POCD. Mechanisms of hippocampal and extra-hippocampal dysfunction due to neuroinflammation are discussed, whereas further research perspectives are also given.
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Affiliation(s)
- Marco Cascella
- Division of Anesthesia and Pain Medicine, Istituto Nazionale Tumori - IRCCS - Fondazione G. Pascale, Via Mariano Semmola, Naples, Italy
| | - Sabrina Bimonte
- Division of Anesthesia and Pain Medicine, Istituto Nazionale Tumori - IRCCS - Fondazione G. Pascale, Via Mariano Semmola, Naples, Italy
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Chen L, Zhang B, Shan S, Zhao X. Neuroprotective effects of vitexin against isoflurane-induced neurotoxicity by targeting the TRPV1 and NR2B signaling pathways. Mol Med Rep 2016; 14:5607-5613. [PMID: 27878303 DOI: 10.3892/mmr.2016.5948] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 07/12/2016] [Indexed: 11/05/2022] Open
Abstract
Vitexin is a bioactive compound extracted from hawthorn leaves, which reduces blood pressure and has anti‑inflammatory and potential anticancer effects. However, the mechanisms underlying the protective effects of vitexin against isoflurane‑induced neurotoxicity remain elusive. Therefore, the aim of the present study was to investigate these mechanisms further. Sprague Dawley rats received 1.4% isoflurane in a 100% oxygen environment for 2 h. Human PC12 pheochromocytoma neurosecretory cells were exposed to 2% isoflurane for 12 h before they were treated with 1, 10 or 100 µM vitexin for a further 24 h. Vitexin inhibited the isoflurane-induced cell cytotoxicity and weakened isoflurane-induced neuroinflammation and oxidative stress pathways in PC12 cells. In addition, treatment with vitexin suppressed isoflurane‑induced caspase‑3 activation and increased β-secretase 1 levels in PC12 cells. Furthermore, vitexin treatment decreased the levels of isoflurane‑induced cytosolic calcium and reactive oxygen species, and downregulated the expression of transient receptor potential cation channel subfamily V member 1 (TRPV1) and glutamate ionotropic receptor NMDA type subunit 2B (NR2B) protein expression in isoflurane-treated PC12 cells. These results suggest that vitexin mediates its protective effects against isoflurane-induced neurotoxicity by targeting the TRPV1 and NR2B signaling pathways.
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Affiliation(s)
- Linlin Chen
- Department of Anesthesiology, The Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
| | - Bin Zhang
- Department of Anesthesiology, The Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
| | - Shiqiang Shan
- Department of Anesthesiology, The Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
| | - Xin Zhao
- Department of Anesthesiology, The Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
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20
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Xanthohumol inhibits proliferation of laryngeal squamous cell carcinoma. Oncol Lett 2016; 12:5289-5294. [PMID: 28105237 DOI: 10.3892/ol.2016.5313] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 08/19/2016] [Indexed: 01/15/2023] Open
Abstract
Xanthohumol is a flavonoid compound that exhibits antioxidant and anticancer effects, and is used to treat atherosclerosis. The aim of the present study was to investigate the effect of xanthohumol on the cell proliferation of laryngeal squamous cell carcinoma and to understand the mechanism of its action. The effects of xanthohumol on the cell viability and apoptosis rate of laryngeal squamous cell carcinoma SCC4 cells were assessed by Annexin V-fluorescein isothiocyanate/propidium iodide staining. In addition, the expression levels of pro-apoptotic proteins, caspase-3, caspase-8, caspase-9, poly ADP ribose polymerase (PARP) p53 and apoptosis-inducing factor (AIF), as well as anti-apoptotic markers, B-cell lymphoma 2 (Bcl-2) and myeloid cell leukemia 1 (Mcl-1), were analyzed by western blotting. The results revealed that treatment with 40 µM xanthohumol significantly inhibited the proliferation of SCC4 cells. Furthermore, xanthohumol treatment (40 µM) induced SCC4 cell apoptosis, as indicated by the significant increase in activity and expression of caspase-3, caspase-8, caspase-9, PARP, p53 and AIF. By contrast, the protein expression of Bcl-2 and Mcl-1 was significantly decreased following treatment with 40 µM xanthohumol. Taken together, the results of the present study indicated that xanthohumol mediates growth suppression and apoptosis induction, which was mediated via the suppression of Bcl-2 and Mcl-1 and activation of PARP, p53 and AIF signaling pathways. Therefore, future studies that investigate xanthohumol as a potential therapeutic agent for laryngeal squamous cell carcinoma are required.
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Abdel-Zaher AO, Hamdy MM, Abdel-Rahman MS, Abd El-Hamid DH. Protective effect of citicoline against aluminum-induced cognitive impairments in rats. Toxicol Ind Health 2016; 33:308-317. [PMID: 27178312 DOI: 10.1177/0748233716641869] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The potential protective effect of citicoline on aluminum chloride-induced cognitive deficits was investigated in rats. In a Morris water maze, administration of aluminum chloride to rats for 90 days resulted in increased escape latency to reach the platform and decreased swimming speed in acquisition trials. Similarly, in probe trials, the time required to reach the hidden platform was increased and the time spent in the target quadrant was reduced. Also, administration of aluminum chloride to rats for 90 days increased the reference and working memory errors and time required to end the task in the radial arm maze. In addition, this treatment decreased the step-through latency in the passive avoidance test. Concurrently, treatment of rats with aluminum chloride for 90 days increased hippocampal glutamate, malondialdehyde, and nitrite levels and decreased intracellular reduced glutathione level. In the citicoline-treated group, aluminum chloride-induced learning and memory impairments as assessed by the Morris water maze, radial arm maze, and passive avoidance tests were inhibited. At the same time, treatment of rats with citicoline prevented the biochemical alterations induced by aluminum chloride in the hippocampus. It can be concluded that elevation of hippocampal glutamate level with consequent oxidative stress and nitric oxide (NO) overproduction may play an important role in aluminum-induced cognitive impairments. Also, our results suggest, for the first time, that citicoline can protect against the development of these cognitive deficits through inhibition of aluminum-induced elevation of glutamate level, oxidative stress, and NO overproduction in the hippocampus.
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Affiliation(s)
- Ahmed O Abdel-Zaher
- Department of Pharmacology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Mostafa M Hamdy
- Department of Pharmacology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | | | - Doaa H Abd El-Hamid
- Department of Pharmacology, Faculty of Medicine, Assiut University, Assiut, Egypt
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Wang W, Lu R, Feng DY, Zhang H. Sevoflurane Inhibits Glutamate-Aspartate Transporter and Glial Fibrillary Acidic Protein Expression in Hippocampal Astrocytes of Neonatal Rats Through the Janus Kinase/Signal Transducer and Activator of Transcription (JAK/STAT) Pathway. Anesth Analg 2016; 123:93-102. [DOI: 10.1213/ane.0000000000001238] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Liang B, Fang J. Postnatal Isoflurane Exposure Induces Cognitive Impairment and Abnormal Histone Acetylation of Glutamatergic Systems in the Hippocampus of Adolescent Rats. J Mol Neurosci 2016; 60:11-20. [PMID: 27307148 DOI: 10.1007/s12031-016-0756-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 04/11/2016] [Indexed: 12/19/2022]
Abstract
Isoflurane can elicit cognitive impairment. However, the pathogenesis in the brain remains inconclusive. The present study investigated the mechanism of glutamate neurotoxicity in adolescent male rats that underwent postnatal isoflurane exposure and the role of sodium butyrate (NaB) in cognitive impairment induced by isoflurane exposure. Seven-day-old rats were exposed to 1.7 % isoflurane for 35 min every day for four consecutive days, and then glutamate neurotoxicity was examined in the hippocampus. Morris water maze analysis showed cognitive impairments in isoflurane-exposed rats. High-performance liquid chromatography found higher hippocampal glutamate concentrations following in vitro and in vivo isoflurane exposure. The percentage of early apoptotic hippocampal neurons was markedly increased after isoflurane exposure. Decreased acetylation and increased HDAC2 activity were observed in the hippocampus of isoflurane-exposed rats and hippocampal neurons. Furthermore, postnatal isoflurane exposure decreased histone acetylation of hippocampal neurons in the promoter regions of GLT-1 and mGLuR1/5, but not mGLuR2/3. Treatment with NaB not only restored the histone acetylation of the GLT-1 and mGLuR1/5 promoter regions and glutamate excitatory neurotoxicity in hippocampal neurons, but also improved cognitive impairment in vivo. Moreover, NaB may be a potential therapeutic drug for cognitive impairment caused by isoflurane exposure. These results suggest that postnatal isoflurane exposure contributes to cognitive impairment via decreasing histone acetylation of glutamatergic systems in the hippocampus of adolescent rats.
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Affiliation(s)
- Bing Liang
- Department of Anesthesiology, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, Henan, 450000, China
| | - Jie Fang
- Department of Anesthesiology, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, Henan, 450000, China.
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Recent Advance in the Relationship between Excitatory Amino Acid Transporters and Parkinson's Disease. Neural Plast 2016; 2016:8941327. [PMID: 26981287 PMCID: PMC4769779 DOI: 10.1155/2016/8941327] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 01/05/2016] [Accepted: 01/18/2016] [Indexed: 01/12/2023] Open
Abstract
Parkinson's disease (PD) is the most common movement disorder disease in the elderly and is characterized by degeneration of dopamine neurons and formation of Lewy bodies. Glutamate is the major excitatory neurotransmitter in the central nervous system (CNS). If glutamate is not removed promptly in the synaptic cleft, it will excessively stimulate the glutamate receptors and induce excitotoxic effects on the CNS. With lack of extracellular enzyme to decompose glutamate, glutamate uptake in the synaptic cleft is mainly achieved by the excitatory amino acid transporters (EAATs, also known as high-affinity glutamate transporters). Current studies have confirmed that decreased expression and function of EAATs appear in PD animal models. Moreover, single unilateral administration of EAATs inhibitor in the substantia nigra mimics several PD features and this is a solid evidence supporting that decreased EAATs contribute to the process of PD. Drugs or treatments promoting the expression and function of EAATs are shown to attenuate dopamine neurons death in the substantia nigra and striatum, ameliorate the behavior disorder, and improve cognitive abilities in PD animal models. EAATs are potential effective drug targets in treatment of PD and thus study of relationship between EAATs and PD has predominant medical significance currently.
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25
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Xiao KQ, Xiao M, Meng L, Du XY, Hu J, Gao BF, Yu WQ, Wang XJ, Ban YL. Effect of subarachnoid nerve block anesthesia on glutamate transporter GLAST and GLT-1 expressions in rabbits. ASIAN PAC J TROP MED 2015; 8:565-8. [PMID: 26276289 DOI: 10.1016/j.apjtm.2015.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 05/20/2015] [Accepted: 06/15/2015] [Indexed: 10/23/2022] Open
Abstract
OBJECTIVE To observe the effect of subarachnoid nerve block anesthesia on glutamate transporter glutamate-aspartate transporter (GLAST) and GLT-1 expressions in rabbits, and to investigate the effect of peripheral nerve anesthesia on the morphology and function of the spinal cord. METHODS Twenty healthy New Zealand white rabbits were randomly divided into two groups: the experimental group and control group; with 10 rabbits in each group. For spinal nerve anesthesia, 5 g/L of bupivacaine was used in the experimental group, and sterile saline was used in the control group. After 30 min of cardiac perfusion, GLAST and GLT-1 protein expression in spinal neurons were detected by immunohistochemistry and immunofluorescence staining. RESULTS GLAST and GLT-1 protein-positive cells increased in neurons in the experimental group, compared with the control group (P < 0.05). CONCLUSIONS After subarachnoid nerve block anesthesia, rabbit glutamate transporter GLAST and GLT-1 expression is increased; and spinal cord nerve cell function is inhibited.
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Affiliation(s)
- Ke-Qing Xiao
- Department of Anesthesiology, Shandong Provincial Hospital, Jinan, Shandong 250031, China.
| | - Mei Xiao
- Division of Preventive Medicine, Third People's Hospital of Pingdu City, Qingdao, Shandong 266753, China
| | - Li Meng
- Department of Anesthesiology, Shandong Provincial Hospital, Jinan, Shandong 250031, China
| | - Xiang-Yang Du
- Department of Anesthesiology, Shandong Provincial Hospital, Jinan, Shandong 250031, China
| | - Jing Hu
- Department of Anesthesiology, Shandong Provincial Hospital, Jinan, Shandong 250031, China
| | - Bao-Feng Gao
- Department of Anesthesiology, Shandong Provincial Hospital, Jinan, Shandong 250031, China
| | - Wen-Qiang Yu
- Department of Anesthesiology, Shandong Provincial Hospital, Jinan, Shandong 250031, China
| | - Xin-Jie Wang
- Shandong Province Chest Hospital, Department of Respiratory Diseases of Jinan City, Shandong 250 013, China
| | - Yan-Lin Ban
- Department of Anesthesiology, Qianfoshan Hospital Affiliated to Shandong University in Shandong Province, Jinan, Shandong 250014, China
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Liu G, Liu C, Zhang XN. Comparison of the neuropsychological mechanisms of 2,6-diisopropylphenol and N-methyl-D-aspartate receptor antagonist against electroconvulsive therapy-induced learning and memory impairment in depressed rats. Mol Med Rep 2015; 12:3297-3308. [PMID: 25998151 PMCID: PMC4526078 DOI: 10.3892/mmr.2015.3803] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2014] [Accepted: 04/14/2015] [Indexed: 11/06/2022] Open
Abstract
The present study aimed to examine the neurophysiological mechanisms of the 2,6-diisopropylphenol and N-methyl-D-aspartate (NMDA) receptor antagonist against learning and memory impairment, induced by electroconvulsive therapy (ECT). A total of 48 adult depressed rats without olfactory bulbs were randomly divided into six experimental groups: i) saline; ii) 10 mg/kg MK‑801; iii) 10 mg/kg MK‑801 and a course of ECT; iv) 200 mg/kg 2,6‑diisopropylphenol; v) 200 mg/kg 2,6‑diisopropylphenol and a course of ECT; and vi) saline and a course of ECT. The learning and memory abilities of the rats were assessed using a Morris water maze 1 day after a course of ECT. The hippocampus was removed 1 day after assessment using the Morris water maze assessment. The content of glutamate in the hippocampus was detected using high‑performance liquid chromatography. The expression levels of p‑AT8Ser202 and GSK‑3β1H8 in the hippocampus were determined using immunohistochemical staining and western blot analysis. The results demonstrated that the 2,6‑diisopropylphenol NMDA receptor antagonist, MK‑801 and ECT induced learning and memory impairment in the depressed rats. The glutamate content was significantly upregulated by ECT, reduced by 2,6‑diisopropylphenol, and was unaffected by the NMDA receptor antagonist in the hippocampus of the depressed rats. Tau protein hyperphosphorylation in the hippocampus was upregulated by ECT, but was reduced by 2,6‑diisopropylphenol and the MK‑801 NMDA receptor antagonist. It was also demonstrated that 2,6‑diisopropylphenol prevented learning and memory impairment and reduced the hyperphosphorylation of the Tau protein, which was induced by eECT. GSK‑3β was found to be the key protein involved in this signaling pathway. The ECT reduced the learning and memory impairment, caused by hyperphosphorylation of the Tau protein, in the depressed rats by upregulating the glutamate content.
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Affiliation(s)
- Gang Liu
- Department of Anesthesiology, General Hospital of Beijing Military Area of PLA, Beijing 100700, P.R. China
| | - Chao Liu
- Department of Anesthesiology, Tianjin Chest Hospital, Tianjin 300222, P.R. China
| | - Xue-Ning Zhang
- Department of Radiology, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
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Neuroligin-associated microRNA-932 targets actin and regulates memory in the honeybee. Nat Commun 2014; 5:5529. [PMID: 25409902 DOI: 10.1038/ncomms6529] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 10/10/2014] [Indexed: 02/06/2023] Open
Abstract
Increasing evidence suggests small non-coding RNAs (ncRNAs) such as microRNAs (miRNAs) control levels of mRNA expression during experience-related remodelling of the brain. Here we use an associative olfactory learning paradigm in the honeybee Apis mellifera to examine gene expression changes in the brain during memory formation. Brain transcriptome analysis reveals a general downregulation of protein-coding genes, including asparagine synthetase and actin, and upregulation of ncRNAs. miRNA-mRNA network predictions together with PCR validation suggest miRNAs including miR-210 and miR-932 target the downregulated protein-coding genes. Feeding cholesterol-conjugated antisense RNA to bees results in the inhibition of miR-210 and of miR-932. Loss of miR-932 impairs long-term memory formation, but not memory acquisition. Functional analyses show that miR-932 interacts with Act5C, providing evidence for direct regulation of actin expression by an miRNA. An activity-dependent increase in miR-932 expression may therefore control actin-related plasticity mechanisms and affect memory formation in the brain.
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Giles EK, Lawrence AJ, Duncan JR. Exploring the Modulation of Hypoxia-Inducible Factor (HIF)-1α by Volatile Anesthetics as a Possible Mechanism Underlying Volatile Anesthetic-Induced CNS Injury. Neurochem Res 2014; 39:1640-7. [DOI: 10.1007/s11064-014-1379-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 06/26/2014] [Accepted: 06/30/2014] [Indexed: 12/11/2022]
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Matos-Ocasio F, Hernández-López A, Thompson KJ. Ceftriaxone, a GLT-1 transporter activator, disrupts hippocampal learning in rats. Pharmacol Biochem Behav 2014; 122:118-21. [PMID: 24650590 DOI: 10.1016/j.pbb.2014.03.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 03/05/2014] [Accepted: 03/12/2014] [Indexed: 10/25/2022]
Abstract
Glutamate transporters (GluTs) are important for maintaining optimal glutamate concentrations at the synapse. This allows proper synaptic response, plasticity and prevents neurotoxicity. It has been shown that the β-lactam antibiotic ceftriaxone (Rocephin) induces an up-regulation of the glutamate transporter GLT-1. This GLT-1 up-regulation blocks the metabotropic glutamate receptor (mGluR) dependent long-term depression (LTD) at the mossy fiber (MF)-CA3 hippocampal synapse. It also has negative effects on long-term potentiation (LTP). However, the effects of GLT-1 up-regulation on hippocampal learning in rats are not known. In this study, we examine the role of chronic administration of ceftriaxone on novel object recognition, which is a hippocampal-dependent spatial learning task. Male Sprague Dawley rats (2-3 months old) were administered ceftriaxone (via i.p. injections, 200 mg/kg) for 8 consecutive days prior to training and testing on a standard novel object recognition task. We found that rats administered with ceftriaxone display memory impairments in novel object recognition, when compared to control rats (p<0.05). Our findings show that a potential up-regulation of GLT-1 via ceftriaxone administration has detrimental effects on spatial learning and memory in rats. Our results further support the notion that glutamate transporters provide an essential regulatory role in hippocampal learning and memory.
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Affiliation(s)
- Félix Matos-Ocasio
- Department of Physiology and Pharmacology, Ponce School of Medicine and Health Sciences, Ponce 00732-7004 Puerto Rico.
| | - Anixa Hernández-López
- Department of Physiology and Pharmacology, Ponce School of Medicine and Health Sciences, Ponce 00732-7004 Puerto Rico.
| | - Kenira J Thompson
- Department of Physiology and Pharmacology, Ponce School of Medicine and Health Sciences, Ponce 00732-7004 Puerto Rico; Department of Psychiatry, Ponce School of Medicine and Health Sciences, Ponce 00732-7004, Puerto Rico; Department of Psychology, Ponce School of Medicine and Health Sciences, Ponce 00732-7004, Puerto Rico.
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Decreased Insulin-Like Growth Factor-I and Its Receptor Expression in the Hippocampus and Somatosensory Cortex of the Aged Mouse. Neurochem Res 2014; 39:770-6. [DOI: 10.1007/s11064-014-1269-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 02/22/2014] [Accepted: 02/25/2014] [Indexed: 10/25/2022]
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Daulatzai MA. Neurotoxic Saboteurs: Straws that Break the Hippo’s (Hippocampus) Back Drive Cognitive Impairment and Alzheimer’s Disease. Neurotox Res 2013; 24:407-59. [DOI: 10.1007/s12640-013-9407-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 06/06/2013] [Accepted: 06/17/2013] [Indexed: 12/29/2022]
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