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Kowalczyk T, Staszelis A, Bocian R, Siwiec M, Sowa JE, Tokarski K, Kaźmierska-Grębowska P, Caban B. Posterior hypothalamic theta rhythm: Electrophysiological basis and involvement of glutamatergic receptors. Hippocampus 2023; 33:844-861. [PMID: 36688619 DOI: 10.1002/hipo.23500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 12/20/2022] [Accepted: 12/29/2022] [Indexed: 01/24/2023]
Abstract
The posterior hypothalamic area (PHa), including the supramammillary nucleus (SuM) and posterior hypothalamic nuclei, forms a crucial part of the ascending brainstem hippocampal synchronizing pathway, that is involved in the frequency programming and modulation of rhythmic theta activity generated in limbic structures. Recent investigations show that in addition to being a modulator of limbic theta activity, the PHa is capable of producing well-synchronized local theta field potentials by itself. The purpose of this study was to examine the ability of the PHa to generate theta field potentials and accompanying cell discharges in response to glutamatergic stimulation under both in vitro and in vivo conditions. The second objective was to examine the electrophysiological properties of neurons located in the SuM and posterior hypothalamic nuclei. Extracellular in vivo and in vitro as well as intracellular in vitro experiments revealed that glutamatergic stimulation of PHa with kainic acid induces well-synchronized local theta field oscillations in both the supramammillary and posterior hypothalamic nuclei. Furthermore, the glutamatergic PHa theta rhythm recorded extracellularly was accompanied by the activity of specific subtypes of theta-related neurons. We identify, for the first time, a subpopulation of supramammillary and posterior hypothalamic neurons that express clear subthreshold membrane potential oscillations in the theta frequency range.
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Affiliation(s)
- Tomasz Kowalczyk
- Department of Neurobiology, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
| | - Agata Staszelis
- Department of Neurobiology, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
| | - Renata Bocian
- Department of Neurobiology, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
| | - Marcin Siwiec
- Department of Physiology, Maj Institute of Pharmacology Polish Academy of Sciences, Krakow, Poland
| | - Joanna E Sowa
- Department of Physiology, Maj Institute of Pharmacology Polish Academy of Sciences, Krakow, Poland
| | - Krzysztof Tokarski
- Department of Physiology, Maj Institute of Pharmacology Polish Academy of Sciences, Krakow, Poland
| | | | - Bartosz Caban
- Department of Neurobiology, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
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Lamotrigine Attenuates Neuronal Excitability, Depresses GABA Synaptic Inhibition, and Modulates Theta Rhythms in Rat Hippocampus. Int J Mol Sci 2021; 22:ijms222413604. [PMID: 34948401 PMCID: PMC8705017 DOI: 10.3390/ijms222413604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/29/2021] [Accepted: 12/05/2021] [Indexed: 12/03/2022] Open
Abstract
Theta oscillations generated in hippocampal (HPC) and cortical neuronal networks are involved in various aspects of brain function, including sensorimotor integration, movement planning, memory formation and attention. Disruptions of theta rhythms are present in individuals with brain disorders, including epilepsy and Alzheimer’s disease. Theta rhythm generation involves a specific interplay between cellular (ion channel) and network (synaptic) mechanisms. HCN channels are theta modulators, and several medications are known to enhance their activity. We investigated how different doses of lamotrigine (LTG), an HCN channel modulator, and antiepileptic and neuroprotective agent, would affect HPC theta rhythms in acute HPC slices (in vitro) and anaesthetized rats (in vivo). Whole-cell patch clamp recordings revealed that LTG decreased GABAA-fast transmission in CA3 cells, in vitro. In addition, LTG directly depressed CA3 and CA1 pyramidal neuron excitability. These effects were partially blocked by ZD 7288, a selective HCN blocker, and are consistent with decreased excitability associated with antiepileptic actions. Lamotrigine depressed HPC theta oscillations in vitro, also consistent with its neuronal depressant effects. In contrast, it exerted an opposite, enhancing effect, on theta recorded in vivo. The contradictory in vivo and in vitro results indicate that LTG increases ascending theta activating medial septum/entorhinal synaptic inputs that over-power the depressant effects seen in HPC neurons. These results provide new insights into LTG actions and indicate an opportunity to develop more precise therapeutics for the treatment of dementias, memory disorders and epilepsy.
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A Model of the CA1 Field Rhythms. eNeuro 2021; 8:ENEURO.0192-21.2021. [PMID: 34670820 PMCID: PMC8577063 DOI: 10.1523/eneuro.0192-21.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 08/23/2021] [Accepted: 09/19/2021] [Indexed: 12/03/2022] Open
Abstract
We propose a model of the main rhythms in the hippocampal CA1 field: theta rhythm; slow, middle, and fast gamma rhythms; and ripple oscillations. We have based this on data obtained from animals behaving freely. We have considered the modes of neuronal discharges and the occurrence of local field potential oscillations in the theta and non-theta states at different inputs from the CA3 field, the medial entorhinal cortex, and the medial septum. In our work, we tried to reproduce the main experimental phenomena about rhythms in the CA1 field: the coupling of neurons to the phase of rhythms, cross-rhythm phase–phase coupling, and phase–amplitude coupling. Using computational experiments, we have proved the hypothesis that the descending phase of the theta rhythm in the CA1 field is formed by the input from the CA3 field via the Shaffer collaterals, and the ascending phase of the theta rhythm is formed by the IPSPs from CCK basket cells. The slow gamma rhythm is coupled to the descending phase of the theta rhythm, since it also depends on the arrival of the signal via the Shaffer collaterals. The middle gamma rhythm is formed by the EPSPs of the principal neurons of the third layer of the entorhinal cortex, corresponds to experimental data. We were able to unite in a single mathematical model several theoretical ideas about the mechanisms of rhythmic processes in the CA1 field of the hippocampus.
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Xu X, Xiang S, Zhang Q, Yin T, Kong W, Zhang T. rTMS alleviates cognitive and neural oscillatory deficits induced by hindlimb unloading in mice via maintaining balance between glutamatergic and GABAergic systems. Brain Res Bull 2021; 172:98-107. [PMID: 33895272 DOI: 10.1016/j.brainresbull.2021.04.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 03/26/2021] [Accepted: 04/19/2021] [Indexed: 11/26/2022]
Abstract
Microgravity, as a part of the stress of space flight, has several negative effects on cognitive functions. Repetitive transcranial magnetic stimulation (rTMS), as a novel non-invasive technique, could be an effective approach to alleviated cognitive decline, applied in both preclinical and clinical studies. Neural oscillations and their interactions are involved in cognitive functions and support the communication of neural information. The neural oscillation could be a window from which we may understand what happens in the brain. The current study aimed to explore if 15 Hz rTMS plays a neural modulation role in a mouse model of hindlimb unloading. We hypothezed that rTMS can improve the cognitive and neural oscillatory deficits induced by hindlimb unloading via maintaining the balance between glutamatergic and GABAergic systems. Our data show that rTMS can significantly alleviate behavior deficits, modulate theta oscillation, improve the disturbed power distribution of theta oscillation and the decreased strength of Cross-Frequency Coupling in the dentate gyrus region, and effectively mitigated the blocked communication of neural information in the perforant pathway (PP)-dentate gyrus (DG) neural pathway in Hu mice. Furthermore, biochemical analysis using high-performance liquid chromatography and Western blot assay confirmed that rTMS increases the low expression of glutamate (Glu) and N-Methyl d-Aspartate receptor subtype 2B (NR2B) and decreases the high expression of γ-aminobutyric acid (GABA), 67 KDa isoform of glutamate decarboxylase (GAD67), and GABA type A receptor subunit alpha1 (GABAARα1) in the hippocampus of Hu mice. Taken together, the results suggest that rTMS plays a significant neural modulation role in the hippocampal neural activity disorders induced by Hu, which possibly depends on rTMS maintaining the balance of glutamatergic and gamma-aminobutyric acidergic (GABAergic) systems.
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Affiliation(s)
- Xinxin Xu
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071, Tianjin, PR China
| | - Shitong Xiang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071, Tianjin, PR China
| | - Qiyue Zhang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071, Tianjin, PR China
| | - Tao Yin
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, PR China
| | - Wanzeng Kong
- Key Laboratory of Brain Machine Collaborative Intelligence of Zhejiang Province, Hangzhou Dianzi University, 310018, Hangzhou, PR China.
| | - Tao Zhang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071, Tianjin, PR China.
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Yang Z, Xiao X, Chen R, Xu X, Kong W, Zhang T. Disc1 gene down-regulation impaired synaptic plasticity and recognition memory via disrupting neural activity in mice. Brain Res Bull 2021; 171:84-90. [PMID: 33745948 DOI: 10.1016/j.brainresbull.2021.03.011] [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: 10/02/2020] [Revised: 02/25/2021] [Accepted: 03/15/2021] [Indexed: 10/21/2022]
Abstract
The gene of Disrupted-in-schizophrenia 1 (Disc1) is closely related to mental diseases with cognitive deficits, but there are few studies on the changes in neural oscillations and recognition memory. Neural oscillations plays a key role in the nervous system in a dynamic form, which is closely related to advanced cognitive activities such as information processing and memory consolidation. Hence, we aimed to investigate if Disc1 knockdown disrupted the normal pattern of neural activities in the mouse hippocampus network, and determined if quantitative neural oscillation approach could be a potential diagnostic tool for mental disorders. In the study, we reported that Disc1 gene, downregulated by short-hairpin RNA (shRNA), not only induced anxiety-like behavior and sociability impairment but also damaged both synaptic plasticity and recognition memory in mice. Moreover, Disc1 knockdown mice exhibited evidently abnormal power spectral distributions, reduced phase synchronizations, and decreased phase-amplitude coupling strength compared to that of normal animals. In addition, transcriptome analyses showed that there were clearly transcriptional changes in Disc1 knockdown mice. Altogether, our findings suggest that the abnormal pattern of neural activities in the hippocampus network disrupts information processing and finally leads to the impairments of synaptic plasticity and recognition in Disc1 knockdown mice, which are possibly associated with the obstruction of neurotransmitter transmission. Importantly, the data imply that the analysis of neural oscillation pattern provides a potential diagnosis approach for mental disorders.
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Affiliation(s)
- Ze Yang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071, Tianjin, PR China
| | - Xi Xiao
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071, Tianjin, PR China; Tianjin International Joint Research Center for Neural Engineering, Academy of Medical Engineering and Translational Medicine, Tianjin University, 300072, Tianjin, PR China
| | - Runwen Chen
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071, Tianjin, PR China
| | - Xinxin Xu
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071, Tianjin, PR China
| | - Wanzeng Kong
- Key Laboratory of Brain Machine Collaborative Intelligence of Zhejiang Province, Hangzhou Dianzi University, 310018, Hangzhou, PR China.
| | - Tao Zhang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071, Tianjin, PR China.
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Nuñez A, Buño W. The Theta Rhythm of the Hippocampus: From Neuronal and Circuit Mechanisms to Behavior. Front Cell Neurosci 2021; 15:649262. [PMID: 33746716 PMCID: PMC7970048 DOI: 10.3389/fncel.2021.649262] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 01/28/2021] [Indexed: 11/17/2022] Open
Abstract
This review focuses on the neuronal and circuit mechanisms involved in the generation of the theta (θ) rhythm and of its participation in behavior. Data have accumulated indicating that θ arises from interactions between medial septum-diagonal band of Broca (MS-DbB) and intra-hippocampal circuits. The intrinsic properties of MS-DbB and hippocampal neurons have also been shown to play a key role in θ generation. A growing number of studies suggest that θ may represent a timing mechanism to temporally organize movement sequences, memory encoding, or planned trajectories for spatial navigation. To accomplish those functions, θ and gamma (γ) oscillations interact during the awake state and REM sleep, which are considered to be critical for learning and memory processes. Further, we discuss that the loss of this interaction is at the base of various neurophatological conditions.
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Affiliation(s)
- Angel Nuñez
- Departamento de Anatomía, Histología y Neurociencia, Facultad de Medicina, Universidad Autonoma de Madrid, Madrid, Spain
| | - Washington Buño
- Instituto Cajal, Consejo Superior de Investigaciones Cientificas, Madrid, Spain
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Xiang S, Zhang Y, Jiang T, Ke Z, Shang Y, Ning W, Yang Z, Zhang T. Knockdown of Follistatin-like 1 disrupts synaptic transmission in hippocampus and leads to cognitive impairments. Exp Neurol 2020; 333:113412. [PMID: 32721453 DOI: 10.1016/j.expneurol.2020.113412] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 07/10/2020] [Accepted: 07/17/2020] [Indexed: 01/11/2023]
Abstract
Follistatin-like 1 (FSTL1), also named transforming growth factor (TGF)-β1-inducible gene, is a secreted extracellular glycoprotein expressing widely in nervous system. Several recent studies have revealed that FSTL1 plays an essential role in neurological diseases including neuropathic pain and ischemic stroke. It proves that FSTL1 suppresses synaptic transmission by activating Na/K-ATPase in DRG neurons and inhibits neuronal apoptosis by phosphorylation AKT signaling. However, it is not clear whether FSTL1 can play a role in other type of neuron or neurodegenerative diseases. In this study, we found that the mice with Fstl1 genetic knockdown showed not only the impairments of learning and memory abilities, but also abnormal neural oscillations and synaptic plasticity in the hippocampus. Subsequently, we identified broad transcriptional changes including 55 up-regulated and 184 down-regulated genes in Fstl1 knockdown mice by RNA-Seq analysis, as well as neurotransmitter transport, synaptic transmission and disease-related genes. The expression changes of some DEGs were further validated via quantitative Realtime PCR (qRT-PCR). Further patch-clamp whole cell recording showed that Fstl1+/- mice displayed a significant decrease in glutamatergic synaptic transmission and increase in GABAergic synaptic transmission, which were consistent with the RNA-Seq analysis. Taken together, our results provide an evidence and a possibly underlying mechanism for the critical role of FSTL1 in the hippocampus on learning and memory and normal neural oscillations, suggesting that FSTL1 may plays an important role in neurodegenerative diseases related to cognitive impairments.
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Affiliation(s)
- Shitong Xiang
- School of Medicine, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, PR China; College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin 300071, PR China
| | - Yuying Zhang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin 300071, PR China
| | - Tianyue Jiang
- School of Medicine, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, PR China
| | - Ziying Ke
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin 300071, PR China
| | - Yingchun Shang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin 300071, PR China
| | - Wen Ning
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin 300071, PR China.
| | - Zhuo Yang
- School of Medicine, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, PR China.
| | - Tao Zhang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin 300071, PR China.
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Xing H, Xu S, Xie X, Wang Y, Lu C, Han X. Levetiracetam induction of theta frequency oscillations in rodent hippocampus in vitro. Can J Physiol Pharmacol 2020; 98:725-732. [PMID: 32516556 DOI: 10.1139/cjpp-2019-0727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Levetiracetam (LEV) has been demonstrated to improve cognitive function. Hippocampal theta rhythm (4-12 Hz) is associated with a variety of cognitively related behaviors, such as exploration in both humans and animal models. We investigated the effects of LEV on the theta rhythm in the rat hippocampal CA3 in hippocampal slices in vitro. We found that LEV increased the theta power in a dose-dependent manner. The increase in theta power can be blocked by GABAA receptor (GABAAR) or NMDA receptor (NMDAR) antagonists but not by AMPA receptor antagonist, indicating the involvement of GABAAR and NMDAR in the induction of theta activity. Interestingly, LEV enhancement of theta power can be also blocked by taurine or GABA-A agonist THIP, indicating that LEV induction of theta may be related to the indirect boosting of GABA action via reduction of extrasynaptic GABAAR activation. Furthermore, the increased theta power can be partially reduced by the mACh receptor (mAChR) antagonist atropine but not by nACh receptor antagonists, suggesting that mAChR activation provides excitatory input into local network responsible for LEV-induced theta. Our study demonstrated that LEV induced a novel theta oscillation in vitro, which may have implications in the treatment of the neuronal disorders with impaired theta oscillation and cognitive function.
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Affiliation(s)
- Hang Xing
- Key Lab of Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Henan, 453000, P.R. China.,Department of Neurology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, 450000, P.R. China
| | - Sihan Xu
- Key Lab of Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Henan, 453000, P.R. China
| | - Xin'e Xie
- Key Lab of Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Henan, 453000, P.R. China
| | - Yuan Wang
- Key Lab of Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Henan, 453000, P.R. China
| | - Chengbiao Lu
- Key Lab of Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Henan, 453000, P.R. China
| | - Xiong Han
- Department of Neurology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, 450000, P.R. China
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Mysin IE, Kitchigina VF, Kazanovich YB. Phase relations of theta oscillations in a computer model of the hippocampal CA1 field: Key role of Schaffer collaterals. Neural Netw 2019; 116:119-138. [DOI: 10.1016/j.neunet.2019.04.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 03/29/2019] [Accepted: 04/02/2019] [Indexed: 02/04/2023]
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Mizrak E, Kim K, Roberts B, Ragland DJ, Carter C, Ranganath C. Impact of oscillatory tDCS targeting left prefrontal cortex on source memory retrieval. Cogn Neurosci 2018; 9:194-207. [DOI: 10.1080/17588928.2018.1512480] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Eda Mizrak
- Department of Psychology, University of California at Davis, Davis, CA, USA
| | - Kamin Kim
- Department of Psychology, University of California at Davis, Davis, CA, USA
| | - Brooke Roberts
- Department of Psychology, University of California at Davis, Davis, CA, USA
| | | | - Cameron Carter
- Department of Psychology, University of California at Davis, Davis, CA, USA
- Center for Neuroscience, University of California at Davis, Davis, CA, USA
- Department of Psychiatry and Behavioral Sciences, University of California, Davis, CA, USA
| | - Charan Ranganath
- Department of Psychology, University of California at Davis, Davis, CA, USA
- Department of Psychiatry and Behavioral Sciences, University of California, Davis, CA, USA
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Kazmierska-Grebowska P, Kobrzycka A, Bocian R, Kowalczyk T, Krokosz A, Grebowski J. Fullerenol C 60(OH) 36 at relatively high concentrations impairs hippocampal theta oscillations (in vivo and in vitro) and triggers epilepsy (in vitro) - A dose response study. Exp Mol Pathol 2018; 105:98-109. [PMID: 29909157 DOI: 10.1016/j.yexmp.2018.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/22/2018] [Accepted: 06/13/2018] [Indexed: 11/29/2022]
Abstract
Since the first identification of fullerenes (C60) and their synthesis in 1985, those compounds have been extensively studied in the biomedical field. In particular, their water-soluble derivatives, fullerenols (C60(OH)n, n = 2-48), have recently been the subject of numerous investigations concerning their antioxidant and prooxidant properties in biological systems. A small fraction of that research has focused on the possible use of C60 and C60(OH)n in neuroscience and the therapy of pathologies such as dementia, amyloid-β (Aβ) formation, and Parkinson's disease. However, only a few studies have focused on their direct effects on neuronal network viability and excitability, especially with the use of electrophysiological and electrochemical approaches. Therefore, we addressed the issue of the direct effect of hydroxylated fullerene nanoparticles C60(OH)36 on local field potentials at the hippocampal formation (HPC) level. With the use of in vitro hippocampal formation slices as a stable model of inducing theta oscillations, and an in vivo model of an anesthetized rat, herein we provide the first convergent electropharmacological evidence that C60(OH)36 at relatively high concentrations (60 μM and 80 μM in vitro; 0.2 μg/μl in vivo) is capable of attenuating the amplitude, power, and frequency of theta oscillations in the HPC neuronal network. At the same time, lower concentrations did not induce any apparent changes. Theta band oscillations constitute a key physiological phenotypic property, which served here as a sensitive assay enabling the study of neural network excitability. Moreover, we report that C60(OH)36 at the concentrations of 60 μM and 80 μM is capable of producing epilepsy in the HPC in vitro, which suggests that C60(OH)n, when applied at higher doses, may have a deleterious effect on the functioning of neuronal networks.
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Affiliation(s)
- Paulina Kazmierska-Grebowska
- Department of Neurobiology, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska Street No 141/143, 90-236 Lodz, Poland.
| | - Anna Kobrzycka
- Department of Neurobiology, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska Street No 141/143, 90-236 Lodz, Poland
| | - Renata Bocian
- Department of Neurobiology, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska Street No 141/143, 90-236 Lodz, Poland
| | - Tomasz Kowalczyk
- Department of Neurobiology, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska Street No 141/143, 90-236 Lodz, Poland
| | - Anita Krokosz
- Department of Molecular Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska Street No 141/143, 90-236 Lodz, Poland
| | - Jacek Grebowski
- Department of Molecular Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska Street No 141/143, 90-236 Lodz, Poland; The Military Medical Training Center, 6 Sierpnia Street No 92, 90-646 Lodz, Poland
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12
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Sardinha VM, Guerra-Gomes S, Caetano I, Tavares G, Martins M, Reis JS, Correia JS, Teixeira-Castro A, Pinto L, Sousa N, Oliveira JF. Astrocytic signaling supports hippocampal-prefrontal theta synchronization and cognitive function. Glia 2017; 65:1944-1960. [PMID: 28885722 DOI: 10.1002/glia.23205] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 07/14/2017] [Accepted: 07/31/2017] [Indexed: 12/18/2022]
Abstract
Astrocytes interact with neurons at the cellular level through modulation of synaptic formation, maturation, and function, but the impact of such interaction into behavior remains unclear. Here, we studied the dominant negative SNARE (dnSNARE) mouse model to dissect the role of astrocyte-derived signaling in corticolimbic circuits, with implications for cognitive processing. We found that the blockade of gliotransmitter release in astrocytes triggers a critical desynchronization of neural theta oscillations between dorsal hippocampus and prefrontal cortex. Moreover, we found a strong cognitive impairment in tasks depending on this network. Importantly, the supplementation with d-serine completely restores hippocampal-prefrontal theta synchronization and rescues the spatial memory and long-term memory of dnSNARE mice. We provide here novel evidence of long distance network modulation by astrocytes, with direct implications to cognitive function.
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Affiliation(s)
- Vanessa Morais Sardinha
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, Braga 4710-057, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Sónia Guerra-Gomes
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, Braga 4710-057, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Inês Caetano
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, Braga 4710-057, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Gabriela Tavares
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, Braga 4710-057, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Manuella Martins
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, Braga 4710-057, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Joana Santos Reis
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, Braga 4710-057, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Joana Sofia Correia
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, Braga 4710-057, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Andreia Teixeira-Castro
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, Braga 4710-057, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Luísa Pinto
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, Braga 4710-057, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Nuno Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, Braga 4710-057, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - João Filipe Oliveira
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, Braga 4710-057, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal.,DIGARC, Polytechnic Institute of Cávado and Ave, Barcelos 4750-810, Portugal
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Alleviation by GABA B Receptors of Neurotoxicity Mediated by Mitochondrial Permeability Transition Pore in Cultured Murine Cortical Neurons Exposed to N-Methyl-D-aspartate. Neurochem Res 2017; 43:79-88. [PMID: 28608233 DOI: 10.1007/s11064-017-2311-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 05/19/2017] [Accepted: 05/24/2017] [Indexed: 01/25/2023]
Abstract
Mitochondrial permeability transition pore (PTP) is supposed to at least in part participate in molecular mechanisms underlying the neurotoxicity seen after overactivation of N-methyl-D-aspartate (NMDA) receptor (NMDAR) in neurons. In this study, we have evaluated whether activation of GABAB receptor (GABABR), which is linked to membrane G protein-coupled inwardly-rectifying K+ ion channels (GIRKs), leads to protection of the NMDA-induced neurotoxicity in a manner relevant to mitochondrial membrane depolarization in cultured embryonic mouse cortical neurons. The cationic fluorescent dye 3,3'-dipropylthiacarbocyanine was used for determination of mitochondrial membrane potential. The PTP opener salicylic acid induced a fluorescence increase with a vitality decrease in a manner sensitive to the PTP inhibitor ciclosporin, while ciclosporin alone was effective in significantly preventing both fluorescence increase and viability decrease by NMDA as seen with an NMDAR antagonist. The NMDA-induced fluorescence increase and viability decrease were similarly prevented by pretreatment with the GABABR agonist baclofen, but not by the GABAAR agonist muscimol, in a fashion sensitive to a GABABR antagonist. Moreover, the GIRK inhibitor tertiapin canceled the inhibition by baclofen of the NMDA-induced fluorescence increase. These results suggest that GABABR rather than GABAAR is protective against the NMDA-induced neurotoxicity mediated by mitochondrial PTP through a mechanism relevant to opening of membrane GIRKs in neurons.
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Kazmierska P, Konopacki J. Development of theta rhythm in hippocampal formation slices perfused with 5-HT1A antagonist, (S)WAY 100135. Brain Res 2015; 1625:142-50. [DOI: 10.1016/j.brainres.2015.08.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 07/28/2015] [Accepted: 08/28/2015] [Indexed: 12/01/2022]
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Brisch R, Bernstein HG, Dobrowolny H, Krzyżanowska M, Jankowski Z, Bogerts B, Gos T. Volumetric analysis of the diagonal band of Broca in patients with schizophrenia and affective disorders: A post-mortem study. Clin Anat 2015; 29:466-72. [PMID: 26457806 DOI: 10.1002/ca.22656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 10/05/2015] [Accepted: 10/09/2015] [Indexed: 11/09/2022]
Abstract
The human diagonal band of Broca is connected to other parts of the limbic system, such as the hippocampus, that are involved in the pathology of schizophrenia. This study aimed to characterize the volume and anterior-to-posterior distance of the human diagonal band of Broca (vertical limb) from post-mortem brains obtained from three groups: healthy control subjects (N = 17), patients with schizophrenia (N = 26), and patients with affective disorders (N = 12). There were no significant differences in the volume or anterior-to-posterior distance in the patients with schizophrenia or affective disorders compared with the healthy control subjects. To date, this is the first post-mortem investigation measuring the volume and the anterior-to-posterior distance of the diagonal band of Broca (vertical limb) in patients with schizophrenia or affective disorders compared with healthy control subjects.
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Affiliation(s)
- Ralf Brisch
- Department of Forensic Medicine, Ul. Dębowa 23, Medical University of Gdańsk, Gdańsk, Poland
| | - Hans-Gert Bernstein
- Department of Psychiatry and Psychotherapy, Otto-von-Guericke-University of Magdeburg, Magdeburg, Germany
| | - Henrik Dobrowolny
- Department of Psychiatry and Psychotherapy, Otto-von-Guericke-University of Magdeburg, Magdeburg, Germany
| | - Marta Krzyżanowska
- Department of Forensic Medicine, Ul. Dębowa 23, Medical University of Gdańsk, Gdańsk, Poland
| | - Zbigniew Jankowski
- Department of Forensic Medicine, Ul. Dębowa 23, Medical University of Gdańsk, Gdańsk, Poland
| | - Bernhard Bogerts
- Department of Psychiatry and Psychotherapy, Otto-von-Guericke-University of Magdeburg, Magdeburg, Germany.,Center for Behavioral Brain Sciences, Magdeburg, Germany
| | - Tomasz Gos
- Department of Forensic Medicine, Ul. Dębowa 23, Medical University of Gdańsk, Gdańsk, Poland
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Bocian R, Kazmierska P, Kłos-Wojtczak P, Kowalczyk T, Konopacki J. Orexinergic theta rhythm in the rat hippocampal formation: In vitro and in vivo findings. Hippocampus 2015; 25:1393-406. [PMID: 25820995 DOI: 10.1002/hipo.22459] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/17/2015] [Indexed: 02/02/2023]
Abstract
Previous in vivo data suggested that orexin neuropeptides (ORX(A) and ORX(B) ) synthetized in hypothalamic neurons were involved in the mechanism of generation of the hippocampal formation theta rhythm. Surprisingly, this suggestion has never been directly proved by experiments using intraseptal or intrahippocampal administration of orexins. In this study, involving the use of in vitro hippocampal formation slices and in vivo model of anesthetized rat, we provide the first convergent electropharmacological evidence that in the presence of both ORX(A) and ORX(B) the hippocampal formation neuronal network is capable of producing oscillations in the theta band. This effect of orexin peptides was antagonized by selective blockers of orexin receptors (OX1 R and OX2 R), SB 334867 and TCS OX2 29, respectively. These results provide evidence for a novel, orexinergic mechanism responsible for the production of theta rhythm in the hippocampal formation neuronal network.
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Affiliation(s)
- Renata Bocian
- Department of Neurobiology, Faculty of Biology and Environmental Protection, University of Lodz, Poland
| | - Paulina Kazmierska
- Department of Neurobiology, Faculty of Biology and Environmental Protection, University of Lodz, Poland
| | - Paulina Kłos-Wojtczak
- Department of Neurobiology, Faculty of Biology and Environmental Protection, University of Lodz, Poland
| | - Tomasz Kowalczyk
- Department of Neurobiology, Faculty of Biology and Environmental Protection, University of Lodz, Poland
| | - Jan Konopacki
- Department of Neurobiology, Faculty of Biology and Environmental Protection, University of Lodz, Poland
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