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van Heusden FC, van Nifterick AM, Souza BC, França ASC, Nauta IM, Stam CJ, Scheltens P, Smit AB, Gouw AA, van Kesteren RE. Neurophysiological alterations in mice and humans carrying mutations in APP and PSEN1 genes. Alzheimers Res Ther 2023; 15:142. [PMID: 37608393 PMCID: PMC10464047 DOI: 10.1186/s13195-023-01287-6] [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: 03/10/2023] [Accepted: 08/11/2023] [Indexed: 08/24/2023]
Abstract
BACKGROUND Studies in animal models of Alzheimer's disease (AD) have provided valuable insights into the molecular and cellular processes underlying neuronal network dysfunction. Whether and how AD-related neurophysiological alterations translate between mice and humans remains however uncertain. METHODS We characterized neurophysiological alterations in mice and humans carrying AD mutations in the APP and/or PSEN1 genes, focusing on early pre-symptomatic changes. Longitudinal local field potential recordings were performed in APP/PS1 mice and cross-sectional magnetoencephalography recordings in human APP and/or PSEN1 mutation carriers. All recordings were acquired in the left frontal cortex, parietal cortex, and hippocampus. Spectral power and functional connectivity were analyzed and compared with wildtype control mice and healthy age-matched human subjects. RESULTS APP/PS1 mice showed increased absolute power, especially at higher frequencies (beta and gamma) and predominantly between 3 and 6 moa. Relative power showed an overall shift from lower to higher frequencies over almost the entire recording period and across all three brain regions. Human mutation carriers, on the other hand, did not show changes in power except for an increase in relative theta power in the hippocampus. Mouse parietal cortex and hippocampal power spectra showed a characteristic peak at around 8 Hz which was not significantly altered in transgenic mice. Human power spectra showed a characteristic peak at around 9 Hz, the frequency of which was significantly reduced in mutation carriers. Significant alterations in functional connectivity were detected in theta, alpha, beta, and gamma frequency bands, but the exact frequency range and direction of change differed for APP/PS1 mice and human mutation carriers. CONCLUSIONS Both mice and humans carrying APP and/or PSEN1 mutations show abnormal neurophysiological activity, but several measures do not translate one-to-one between species. Alterations in absolute and relative power in mice should be interpreted with care and may be due to overexpression of amyloid in combination with the absence of tau pathology and cholinergic degeneration. Future studies should explore whether changes in brain activity in other AD mouse models, for instance, those also including tau pathology, provide better translation to the human AD continuum.
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Affiliation(s)
- Fran C van Heusden
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Vrije Universiteit Amsterdam, Amsterdam, 1081HV, The Netherlands
| | - Anne M van Nifterick
- Alzheimer Center Amsterdam, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC Location VUmc, Amsterdam, 1081HV, The Netherlands
- Clinical Neurophysiology and MEG Center, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC Location VUmc, Amsterdam, 1081HV, The Netherlands
| | - Bryan C Souza
- Donders Institute for Brain, Cognition and Behavior, Radboud University, Nijmegen, 6525AJ, The Netherlands
| | - Arthur S C França
- Donders Institute for Brain, Cognition and Behavior, Radboud University, Nijmegen, 6525AJ, The Netherlands
- Netherlands Institute for Neuroscience, Royal Netherlands Academy of Arts and Sciences, Amsterdam, 1105 BA, The Netherlands
| | - Ilse M Nauta
- MS Center Amsterdam, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC Location VUmc, Amsterdam, 1081HV, The Netherlands
| | - Cornelis J Stam
- Clinical Neurophysiology and MEG Center, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC Location VUmc, Amsterdam, 1081HV, The Netherlands
| | - Philip Scheltens
- Alzheimer Center Amsterdam, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC Location VUmc, Amsterdam, 1081HV, The Netherlands
| | - August B Smit
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Vrije Universiteit Amsterdam, Amsterdam, 1081HV, The Netherlands
| | - Alida A Gouw
- Alzheimer Center Amsterdam, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC Location VUmc, Amsterdam, 1081HV, The Netherlands
- Clinical Neurophysiology and MEG Center, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC Location VUmc, Amsterdam, 1081HV, The Netherlands
| | - Ronald E van Kesteren
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Vrije Universiteit Amsterdam, Amsterdam, 1081HV, The Netherlands.
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Saber Marouf B, Reboreda A, Theissen F, Kaushik R, Sauvage M, Dityatev A, Yoshida M. TRPC4 Channel Knockdown in the Hippocampal CA1 Region Impairs Modulation of Beta Oscillations in Novel Context. BIOLOGY 2023; 12:biology12040629. [PMID: 37106829 PMCID: PMC10135742 DOI: 10.3390/biology12040629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/17/2023] [Accepted: 04/17/2023] [Indexed: 04/29/2023]
Abstract
Hippocampal local field potentials (LFP) are highly related to behavior and memory functions. It has been shown that beta band LFP oscillations are correlated with contextual novelty and mnemonic performance. Evidence suggests that changes in neuromodulators, such as acetylcholine and dopamine, during exploration in a novel environment underlie changes in LFP. However, potential downstream mechanisms through which neuromodulators may alter the beta band oscillation in vivo remain to be fully understood. In this paper, we study the role of the membrane cationic channel TRPC4, which is modulated by various neuromodulators through G-protein-coupled receptors, by combining shRNA-mediated TRPC4 knockdown (KD) with LFP measurements in the CA1 region of the hippocampus in behaving mice. We demonstrate that the increased beta oscillation power seen in the control group mice in a novel environment is absent in the TRPC4 KD group. A similar loss of modulation was also seen in the low-gamma band oscillations in the TRPC4 KD group. These results demonstrate that TRPC4 channels are involved in the novelty-induced modulation of beta and low-gamma oscillations in the CA1 region.
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Affiliation(s)
- Babak Saber Marouf
- Institute of Physiology, Medical Faculty, Otto-Von-Guericke University, 39120 Magdeburg, Germany
- Cognitive Neurophysiology, German Center for Neurodegenerative Diseases (DZNE), 39120 Magdeburg, Germany
- FAM Department, Leibniz Institute for Neurobiology (LIN), 39118 Magdeburg, Germany
| | - Antonio Reboreda
- Cognitive Neurophysiology, German Center for Neurodegenerative Diseases (DZNE), 39120 Magdeburg, Germany
- FAM Department, Leibniz Institute for Neurobiology (LIN), 39118 Magdeburg, Germany
| | - Frederik Theissen
- Cognitive Neurophysiology, German Center for Neurodegenerative Diseases (DZNE), 39120 Magdeburg, Germany
- FAM Department, Leibniz Institute for Neurobiology (LIN), 39118 Magdeburg, Germany
| | - Rahul Kaushik
- Molecular Neuroplasticity Group, German Center for Neurodegenerative Diseases (DZNE), 39120 Magdeburg, Germany
| | - Magdalena Sauvage
- FAM Department, Leibniz Institute for Neurobiology (LIN), 39118 Magdeburg, Germany
- Medical Faculty, Otto-von-Guericke University (OvGU), 39120 Magdeburg, Germany
- Center for Behavioral Brain Sciences (CBBS), 39106 Magdeburg, Germany
| | - Alexander Dityatev
- Molecular Neuroplasticity Group, German Center for Neurodegenerative Diseases (DZNE), 39120 Magdeburg, Germany
- Medical Faculty, Otto-von-Guericke University (OvGU), 39120 Magdeburg, Germany
- Center for Behavioral Brain Sciences (CBBS), 39106 Magdeburg, Germany
| | - Motoharu Yoshida
- Cognitive Neurophysiology, German Center for Neurodegenerative Diseases (DZNE), 39120 Magdeburg, Germany
- FAM Department, Leibniz Institute for Neurobiology (LIN), 39118 Magdeburg, Germany
- Center for Behavioral Brain Sciences (CBBS), 39106 Magdeburg, Germany
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Leung LS, Moallem S, Prado MAM, Prado VF, Chu L. Muscarinic and N‐methyl‐D‐aspartate receptor blockade reveal differences in hippocampal local field potentials in mice with low cholinergic tone. Hippocampus 2022; 32:731-751. [DOI: 10.1002/hipo.23462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Revised: 06/11/2022] [Accepted: 07/24/2022] [Indexed: 11/07/2022]
Affiliation(s)
- L. Stan Leung
- Department of Physiology and Pharmacology University of Western Ontario London Ontario Canada
- Graduate Program in Neuroscience University of Western Ontario London Ontario Canada
| | - Shahin Moallem
- Graduate Program in Neuroscience University of Western Ontario London Ontario Canada
| | - Marco A. M. Prado
- Department of Physiology and Pharmacology University of Western Ontario London Ontario Canada
- Graduate Program in Neuroscience University of Western Ontario London Ontario Canada
- Department of Anatomy and Cell Biology University of Western Ontario London Ontario Canada
- Robarts Research Institute University of Western Ontario London Ontario Canada
| | - Vania F. Prado
- Department of Physiology and Pharmacology University of Western Ontario London Ontario Canada
- Graduate Program in Neuroscience University of Western Ontario London Ontario Canada
- Department of Anatomy and Cell Biology University of Western Ontario London Ontario Canada
- Robarts Research Institute University of Western Ontario London Ontario Canada
| | - Liangwei Chu
- Department of Physiology and Pharmacology University of Western Ontario London Ontario Canada
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Gattas S, Elias GA, Janecek J, Yassa MA, Fortin NJ. Proximal CA1 20-40 Hz power dynamics reflect trial-specific information processing supporting nonspatial sequence memory. eLife 2022; 11:e55528. [PMID: 35532116 PMCID: PMC9170241 DOI: 10.7554/elife.55528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 05/09/2022] [Indexed: 11/13/2022] Open
Abstract
The hippocampus is known to play a critical role in processing information about temporal context. However, it remains unclear how hippocampal oscillations are involved, and how their functional organization is influenced by connectivity gradients. We examined local field potential activity in CA1 as rats performed a nonspatial odor sequence memory task. We found that odor sequence processing epochs were characterized by distinct spectral profiles and proximodistal CA1 gradients of theta and 20-40 Hz power than track running epochs. We also discovered that 20-40 Hz power was predictive of sequence memory performance, particularly in proximal CA1 and during the plateau of high power observed in trials in which animals had to maintain their decision until instructed to respond. Altogether, these results provide evidence that dynamics of 20-40 Hz power along the CA1 axis are linked to trial-specific processing of nonspatial information critical to order judgments and are consistent with a role for 20-40 Hz power in gating information processing.
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Affiliation(s)
- Sandra Gattas
- Department of Electrical Engineering and Computer Science, University of CaliforniaIrvineUnited States
- Center for the Neurobiology of Learning and Memory, University of CaliforniaIrvineUnited States
| | - Gabriel A Elias
- Center for the Neurobiology of Learning and Memory, University of CaliforniaIrvineUnited States
- Department of Neurobiology and Behavior, University of CaliforniaIrvineUnited States
| | - John Janecek
- Center for the Neurobiology of Learning and Memory, University of CaliforniaIrvineUnited States
- Department of Neurobiology and Behavior, University of CaliforniaIrvineUnited States
| | - Michael A Yassa
- Center for the Neurobiology of Learning and Memory, University of CaliforniaIrvineUnited States
- Department of Neurobiology and Behavior, University of CaliforniaIrvineUnited States
| | - Norbert J Fortin
- Center for the Neurobiology of Learning and Memory, University of CaliforniaIrvineUnited States
- Department of Neurobiology and Behavior, University of CaliforniaIrvineUnited States
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Marinho AMDN, Lobão-Soares B, Targino HAS, Vasconcellos YJF, Guarnieri R, Carlotti CG. Decreased hippocampal serotonin 5HT 1A expression in mesial temporal lobe of epilepsy patients. Epilepsy Behav 2022; 129:108574. [PMID: 35189481 DOI: 10.1016/j.yebeh.2022.108574] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 01/10/2023]
Abstract
INTRODUCTION Mesial temporal lobe epilepsy related to hippocampal sclerosis (MTLE-HS) is a surgically remediable epilepsy with a relatively high prevalence and psychiatric comorbidities. Depressive disorders may occur in up to 25% of MTLE-HS patients suggesting a common molecular mechanism underlying both conditions. OBJECTIVE To compare the gene expression comprising serotonin 5HT1A and 5HT2A, noradrenaline (NA) ADRA1A, and ADRA2A receptors in the hippocampus of MTLE-HS patients with and without major depression. METHODS A cross-sectional study allocated 31 patients in three groups: MTLE-HS without psychiatric diagnosis (MTLE-HS group), MTLE-HS with major depression (MTLE-HS-D group) and a control group consisting of healthy volunteers without any neurological or psychiatric disorders. Demographic and clinical characteristics were compared among groups. Gene expression of receptors were analyzed using general linear mixed models (GLMM), with an unstructured matrix, normal link. RESULTS The three groups showed a similar distribution regarding age, gender (p > 0.16), history of initial precipitating injury, family history of epilepsy, monthly frequency of seizures, side of hippocampal sclerosis, interictal spike distribution and anti-seizure medications did not differ between MTLE-HS and MTLE-HS-D groups (p > 0.05). We observed a greater expression of the 5HT1A receptor in the control group when compared to the MTLE-HS (P = .004) and MTLE-HS-D (P = .007). Nevertheless, we did not observe any difference when MTLE-HS and MTLE-HS-D groups were compared to the controls for the ADRA1A (P = .931; P = .931), ADRA2A (P = .120; P = .121) and 5HT2A (P = .638; P = .318, respectively) gene expression. CONCLUSION Mesial temporal lobe epilepsy related to hippocampal sclerosis and MTLE-HS-D patients showed a lowered expression of the 5HT1A receptors when compared with the controls adjusted for age and schooling. Data suggest that temporal lobe epilepsy plasticity may affect serotonin receptors, which may lead to more frequent cases of major depression in this population. More studies comprising wider samples are necessary to confirm these results; they also should investigate serotonin reuptake drugs as an adjuvant therapeutic option for MTLE-HS disorder.
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Affiliation(s)
| | - Bruno Lobão-Soares
- Department of Biophysics and Pharmacology, Federal University of Rio Grande do Norte (DBF - UFRN), Brazil.
| | | | | | | | - Carlos Gilberto Carlotti
- Department of Surgery, Faculty of Medicine of Ribeirão Preto, Universidade de São Paulo, (FMRP-USP), Brazil
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Del Rio-Bermudez C, Blumberg MS. Sleep as a window on the sensorimotor foundations of the developing hippocampus. Hippocampus 2022; 32:89-97. [PMID: 33945190 PMCID: PMC9118132 DOI: 10.1002/hipo.23334] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 03/21/2021] [Indexed: 02/03/2023]
Abstract
The hippocampal formation plays established roles in learning, memory, and related cognitive functions. Recent findings also suggest that the hippocampus integrates sensory feedback from self-generated movements to modulate ongoing motor responses in a changing environment. Such findings support the view of Bland and Oddie (Behavioural Brain Research, 2001, 127, 119-136) that the hippocampus is a site of sensorimotor integration. In further support of this view, we review neurophysiological evidence in developing rats that hippocampal function is built on a sensorimotor foundation and that this foundation is especially evident early in development. Moreover, at those ages when the hippocampus is first establishing functional connectivity with distant sensory and motor structures, that connectivity is preferentially expressed during periods of active (or REM) sleep. These findings reinforce the notion that sleep, as the predominant state of early infancy, provides a critical context for sensorimotor development, including development of the hippocampus and its associated network.
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Affiliation(s)
| | - Mark S Blumberg
- Department of Psychological and Brain Sciences, University of Iowa, Iowa City, Iowa, USA.,Iowa Neuroscience Institute, University of Iowa, Iowa City, Iowa, USA
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7
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Manzella FM, Gulvezan BF, Maksimovic S, Useinovic N, Raol YH, Joksimovic SM, Jevtovic-Todorovic V, Todorovic SM. Neonatal Isoflurane Does Not Affect Sleep Architecture and Minimally Alters Neuronal Beta Oscillations in Adolescent Rats. Front Behav Neurosci 2021; 15:703859. [PMID: 34790103 PMCID: PMC8591236 DOI: 10.3389/fnbeh.2021.703859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 09/28/2021] [Indexed: 11/25/2022] Open
Abstract
General anesthetics are neurotoxic to the developing rodent and primate brains leading to neurocognitive and socio-affective impairment later in life. In addition, sleep patterns are important predictors of cognitive outcomes. Yet, little is known about how anesthetics affect sleep-wake behaviors and their corresponding oscillations. Here we examine how neonatal general anesthesia affects sleep and wake behavior and associated neuronal oscillations. We exposed male and female rat pups to either 6 h of continuous isoflurane or sham anesthesia (compressed air) at the peak of their brain development (postnatal day 7). One cohort of animals was used to examine neurotoxic insult 2 h post-anesthesia exposure. At weaning age, a second cohort of rats was implanted with cortical electroencephalogram electrodes and allowed to recover. During adolescence, we measured sleep architecture (divided into wake, non-rapid eye movement, and rapid eye movement sleep) and electroencephalogram power spectra over a 24 h period. We found that exposure to neonatal isoflurane caused extensive neurotoxicity but did not disrupt sleep architecture in adolescent rats. However, these animals had a small but significant reduction in beta oscillations, specifically in the 12-20 Hz beta 1 range, associated with wake behavior. Furthermore, beta oscillations play a critical role in cortical development, cognitive processing, and homeostatic sleep drive. We speculate that dysregulation of beta oscillations may be implicated in cognitive and socio-affective outcomes associated with neonatal anesthesia.
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Affiliation(s)
- Francesca M. Manzella
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
- Neuroscience Graduate Program, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Bethany F. Gulvezan
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Stefan Maksimovic
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Nemanja Useinovic
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Yogendra H. Raol
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Rockville, MD, United States
| | - Srdjan M. Joksimovic
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Division of Child Neurology, CHOP Research Institute, Children’s Hospital of Philadelphia, Philadelphia, PA, United States
| | - Vesna Jevtovic-Todorovic
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Slobodan M. Todorovic
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
- Neuroscience Graduate Program, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
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8
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Large-Scale and Multiscale Networks in the Rodent Brain during Novelty Exploration. eNeuro 2021; 8:ENEURO.0494-20.2021. [PMID: 33757983 PMCID: PMC8121262 DOI: 10.1523/eneuro.0494-20.2021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 01/27/2021] [Accepted: 02/10/2021] [Indexed: 11/21/2022] Open
Abstract
Neural activity is coordinated across multiple spatial and temporal scales, and these patterns of coordination are implicated in both healthy and impaired cognitive operations. However, empirical cross-scale investigations are relatively infrequent, because of limited data availability and to the difficulty of analyzing rich multivariate datasets. Here, we applied frequency-resolved multivariate source-separation analyses to characterize a large-scale dataset comprising spiking and local field potential (LFP) activity recorded simultaneously in three brain regions (prefrontal cortex, parietal cortex, hippocampus) in freely-moving mice. We identified a constellation of multidimensional, inter-regional networks across a range of frequencies (2-200 Hz). These networks were reproducible within animals across different recording sessions, but varied across different animals, suggesting individual variability in network architecture. The theta band (∼4-10 Hz) networks had several prominent features, including roughly equal contribution from all regions and strong inter-network synchronization. Overall, these findings demonstrate a multidimensional landscape of large-scale functional activations of cortical networks operating across multiple spatial, spectral, and temporal scales during open-field exploration.
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9
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Angrand L, Takillah S, Malissin I, Berriche A, Cervera C, Bel R, Gerard Q, Knoertzer J, Baati R, Kononchik JP, Megarbane B, Thibault K, Dal Bo G. Persistent brainwave disruption and cognitive impairment induced by acute sarin surrogate sub-lethal dose exposure. Toxicology 2021; 456:152787. [PMID: 33887375 DOI: 10.1016/j.tox.2021.152787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 04/11/2021] [Accepted: 04/15/2021] [Indexed: 11/15/2022]
Abstract
Warfare neurotoxicants such as sarin, soman or VX, are organophosphorus compounds which irreversibly inhibit cholinesterase. High-dose exposure with nerve agents (NA) is known to produce seizure activity and related brain damage, while less is known about the effects of acute sub-lethal dose exposure. The aim of this study was to characterize behavioral, brain activity and neuroinflammatory modifications at different time points after exposure to 4-nitrophenyl isopropyl methylphosphonate (NIMP), a sarin surrogate. In order to decipher the impacts of sub-lethal exposure, we chose 4 different doses of NIMP each corresponding to a fraction of the median lethal dose (LD50). First, we conducted a behavioral analysis of symptoms during the first hour following NIMP challenge and established a specific scoring scale for the intoxication severity. The intensity of intoxication signs was dose-dependent and proportional to the cholinesterase activity inhibition evaluated in mice brain. The lowest dose (0.3 LD50) did not induce significant behavioral, electrocorticographic (ECoG) nor cholinesterase activity changes. Animals exposed to one of the other doses (0.5, 0.7 and 0.9 LD50) exhibited substantial changes in behavior, significant cholinesterase activity inhibition, and a disruption of brainwave distribution that persisted in a dose-dependent manner. To evaluate long lasting changes, we conducted ECoG recording for 30 days on mice exposed to 0.5 or 0.9 LD50 of NIMP. Mice in both groups showed long-lasting impairment of theta rhythms, and a lack of restoration in hippocampal ChE activity after 1-month post-exposure. In addition, an increase in neuroinflammatory markers (IBA-1, TNF-α, NF-κB) and edema were transiently observed in mice hippocampus. Furthermore, a novel object recognition test showed an alteration of short-term memory in both groups, 1-month post-NIMP intoxication. Our findings identified both transient and long-term ECoG alterations and some long term cognitive impairments following exposure to sub-lethal doses of NIMP. These may further impact morphopathological alterations in the brain.
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Affiliation(s)
- Loïc Angrand
- Departement of Toxicology and Chemical Risks, French Armed Forces Biomedical Research Institute, Bretigny sur Orge, France; EnvA, IMRB, Maisons-Alfort, France; Université Paris-Est Créteil, INSERM, Team Relaix, Créteil, France
| | - Samir Takillah
- Departement of Neuroscience, Unit of Fatigue and Vigilance, French Armed Forces Biomedical Research Institute, Bretigny sur Orge, France; VIFASOM Team (EA 7330), Paris Descartes University, Sorbonne Paris Cité, Hôtel Dieu, Paris, France
| | - Isabelle Malissin
- Department of Medical and Toxicological Critical Care, Lariboisière Hospital, Federation of Toxicology APHP, Paris-Diderot University, INSERM UMRS-1144, Paris, France
| | - Asma Berriche
- Departement of Toxicology and Chemical Risks, French Armed Forces Biomedical Research Institute, Bretigny sur Orge, France; CEA, Fontenay aux roses, France
| | - Chloe Cervera
- Departement of Toxicology and Chemical Risks, French Armed Forces Biomedical Research Institute, Bretigny sur Orge, France
| | - Rosalie Bel
- Departement of Toxicology and Chemical Risks, French Armed Forces Biomedical Research Institute, Bretigny sur Orge, France
| | - Quentin Gerard
- Departement of Toxicology and Chemical Risks, French Armed Forces Biomedical Research Institute, Bretigny sur Orge, France; Normandie University, UNICAEN, INSERM, GIP Cyceron, Institut Blood and Brain @Caen-Normandie (BB@C), UMR-S U1237, Physiopathology and Imaging of Neurological Disorders (PhIND), Caen, France
| | - Julie Knoertzer
- Departement of Toxicology and Chemical Risks, French Armed Forces Biomedical Research Institute, Bretigny sur Orge, France
| | - Rachid Baati
- ICPEES UMR CNRS 7515, Institut de Chimie des Procédés, pour l'Energie, l'Environnement, et la Santé, Strasbourg, France
| | - Joseph P Kononchik
- Departement of Toxicology and Chemical Risks, French Armed Forces Biomedical Research Institute, Bretigny sur Orge, France
| | - Bruno Megarbane
- VIFASOM Team (EA 7330), Paris Descartes University, Sorbonne Paris Cité, Hôtel Dieu, Paris, France; Department of Medical and Toxicological Critical Care, Lariboisière Hospital, Federation of Toxicology APHP, Paris-Diderot University, INSERM UMRS-1144, Paris, France
| | - Karine Thibault
- Departement of Toxicology and Chemical Risks, French Armed Forces Biomedical Research Institute, Bretigny sur Orge, France.
| | - Gregory Dal Bo
- Departement of Toxicology and Chemical Risks, French Armed Forces Biomedical Research Institute, Bretigny sur Orge, France.
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10
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França ASC, Borgesius NZ, Souza BC, Cohen MX. Beta2 Oscillations in Hippocampal-Cortical Circuits During Novelty Detection. Front Syst Neurosci 2021; 15:617388. [PMID: 33664653 PMCID: PMC7921172 DOI: 10.3389/fnsys.2021.617388] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 01/18/2021] [Indexed: 01/03/2023] Open
Abstract
Novelty detection is a core feature of behavioral adaptation and involves cascades of neuronal responses-from initial evaluation of the stimulus to the encoding of new representations-resulting in the behavioral ability to respond to unexpected inputs. In the past decade, a new important novelty detection feature, beta2 (~20-30 Hz) oscillations, has been described in the hippocampus (HC). However, the interactions between beta2 and the hippocampal network are unknown, as well as the role-or even the presence-of beta2 in other areas involved with novelty detection. In this work, we combined multisite local field potential (LFP) recordings with novelty-related behavioral tasks in mice to describe the oscillatory dynamics associated with novelty detection in the CA1 region of the HC, parietal cortex, and mid-prefrontal cortex. We found that transient beta2 power increases were observed only during interaction with novel contexts and objects, but not with familiar contexts and objects. Also, robust theta-gamma phase-amplitude coupling was observed during the exploration of novel environments. Surprisingly, bursts of beta2 power had strong coupling with the phase of delta-range oscillations. Finally, the parietal and mid-frontal cortices had strong coherence with the HC in both theta and beta2. These results highlight the importance of beta2 oscillations in a larger hippocampal-cortical circuit, suggesting that beta2 plays a role in the mechanism for detecting and modulating behavioral adaptation to novelty.
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Affiliation(s)
- Arthur S. C. França
- Donders Institute for Brain, Cognition and Behavior, Radboud University, Nijmegen, Netherlands
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11
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Iwasaki S, Sasaki T, Ikegaya Y. Hippocampal beta oscillations predict mouse object-location associative memory performance. Hippocampus 2021; 31:503-511. [PMID: 33556218 DOI: 10.1002/hipo.23311] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/14/2020] [Accepted: 01/23/2021] [Indexed: 12/25/2022]
Abstract
Memorizing the locations of environmental cues is crucial for survival and depends on the hippocampus. We recorded local field potentials (LFPs) from the hippocampus of freely moving mice during an object location task. The power of beta-band (23-30 Hz) oscillations increased immediately before approaching objects in a memory-encoding phase. The exploration-induced beta oscillations gradually decreased during the memory-encoding session. Mice that exhibited stronger beta oscillation power exhibited better performance in the subsequent memory-retrieval test. These results suggest that beta oscillations in the hippocampal CA1 region are involved in the memory encoding of object-location associations.
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Affiliation(s)
- Satoshi Iwasaki
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan
| | - Takuya Sasaki
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Saitama, Japan
| | - Yuji Ikegaya
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan.,Center for Information and Neural Networks, National Institute of Information and Communications Technology, Suita City, Osaka, Japan
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12
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Chen KH, Gogia AS, Tang A, Martin Del Campo-Vera R, Sebastian R, Nune G, Wong J, Liu C, Kellis S, Lee B. Beta-band modulation in the human hippocampus during a conflict response task. J Neural Eng 2020; 17. [PMID: 33059331 DOI: 10.1088/1741-2552/abc1b8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 10/15/2020] [Indexed: 02/02/2023]
Abstract
Objective Identify the role of beta-band (13-30 Hz) power modulation in the human hippocampus during conflict processing. Approach We investigated changes in the spectral power of the beta band (13-30 Hz) as measured by depth electrode leads in the hippocampus during a modified Stroop task in six patients with medically-refractory epilepsy. Previous work done with direct electrophysiological recordings in humans has shown hippocampal theta-band (3-8 Hz) modulation during conflict processing. Local field potentials (LFP) sampled at 2k Hz were used for analysis and a non-parametric cluster-permutation t-test was used to identify the time period and frequency ranges of significant power change during cue processing (i.e. post-stimulus, pre-response). Main Results In five of the six patients, we observe a statistically significant increase in hippocampal beta-band power during successful conflict processing in the incongruent trial condition (cluster-based correction for multiple comparisons, p < 0.05). There was no significant beta-band power change observed during the cue processing period of the congruent condition in the hippocampus of these patients. Significance The beta-power changes during conflict processing represented here are consistent with previous studies suggesting that the hippocampus plays a role in conflict processing, but it is the first time that the beta band has been shown to be involved in humans with direct electrophysiological evidence. We propose that beta-band modulation plays a role in successful conflict detection and automatic response inhibition in the human hippocampus as studied during a conflict response task.
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Affiliation(s)
- Kuang-Hsuan Chen
- Neurological Surgery, University of Southern California Keck School of Medicine, Los Angeles, California, UNITED STATES
| | - Angad S Gogia
- University of Southern California Keck School of Medicine, Los Angeles, California, 90089-9034, UNITED STATES
| | - Austin Tang
- Neurological Surgery, University of Southern California Keck School of Medicine, Los Angeles, California, 90089-9034, UNITED STATES
| | | | - Rinu Sebastian
- Neurological Surgery, University of Southern California Keck School of Medicine, Los Angeles, California, UNITED STATES
| | - George Nune
- USC Keck School of Medicine, Los Angeles, California, UNITED STATES
| | - Janeline Wong
- University of Southern California, Los Angeles, 90089-0001, UNITED STATES
| | - Charles Liu
- Neuroresotoration Center and Department of Neurosurgery and Neurology, University of Southern California, Los Angeles, California, UNITED STATES
| | - Spencer Kellis
- Neurosurgery, USC Keck School of Medicine, Los Angeles, California, UNITED STATES
| | - Brian Lee
- Neuroresotoration Center and Department of Neurosurgery and Neurology, University of Southern California, Los Angeles, California, UNITED STATES
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13
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França AS, van Hulten JA, Cohen MX. Low-cost and versatile electrodes for extracellular chronic recordings in rodents. Heliyon 2020; 6:e04867. [PMID: 32984592 PMCID: PMC7492997 DOI: 10.1016/j.heliyon.2020.e04867] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 06/04/2020] [Accepted: 09/04/2020] [Indexed: 11/19/2022] Open
Abstract
Electrophysiological data are used to investigate fundamental properties of brain function, its relation to cognition, and its dysfunction in diseases. The development of reliable and open-source systems for electrophysiological data acquisition is decreasing the total cost of constructing and operating an electrophysiology laboratory, and facilitates low-cost methods to extract and analyze the data (Siegle et al., 2017). Here we detail our method of building custom-designed low-cost electrodes. These electrodes can be customized and manufactured by any researcher to address a broad set of research questions, further decreasing the final cost of an implanted animal. Finally, we present data showing such an electrode has a good signal quality to record LFP.
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14
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Del Campo-Vera RM, Gogia AS, Chen KH, Sebastian R, Kramer DR, Lee MB, Peng T, Tafreshi A, Barbaro MF, Liu CY, Kellis S, Lee B. Beta-band power modulation in the human hippocampus during a reaching task. J Neural Eng 2020; 17:036022. [PMID: 32413878 PMCID: PMC8544757 DOI: 10.1088/1741-2552/ab937f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
OBJECTIVE Characterize the role of the beta-band (13-30 Hz) in the human hippocampus during the execution of voluntary movement. APPROACH We recorded electrophysiological activity in human hippocampus during a reach task using stereotactic electroencephalography (SEEG). SEEG has previously been utilized to study the theta band (3-8 Hz) in conflict processing and spatial navigation, but most studies of hippocampal activity during movement have used noninvasive measures such as fMRI. We analyzed modulation in the beta band (13-30 Hz), which is known to play a prominent role throughout the motor system including the cerebral cortex and basal ganglia. We conducted the classic 'center-out' direct-reach experiment with nine patients undergoing surgical treatment for medically refractory epilepsy. MAIN RESULTS In seven of the nine patients, power spectral analysis showed a statistically significant decrease in power within the beta band (13-30 Hz) during the response phase, compared to the fixation phase, of the center-out direct-reach task using the Wilcoxon signed-rank hypothesis test (p < 0.05). SIGNIFICANCE This finding is consistent with previous literature suggesting that the hippocampus may be involved in the execution of movement, and it is the first time that changes in beta-band power have been demonstrated in the hippocampus using human electrophysiology. Our findings suggest that beta-band modulation in the human hippocampus may play a role in the execution of voluntary movement.
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15
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Del Rio-Bermudez C, Kim J, Sokoloff G, Blumberg MS. Active Sleep Promotes Coherent Oscillatory Activity in the Cortico-Hippocampal System of Infant Rats. Cereb Cortex 2020; 30:2070-2082. [PMID: 31922194 PMCID: PMC7175014 DOI: 10.1093/cercor/bhz223] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 08/09/2019] [Accepted: 08/28/2019] [Indexed: 12/12/2022] Open
Abstract
Active sleep (AS) provides a unique developmental context for synchronizing neural activity within and between cortical and subcortical structures. In week-old rats, sensory feedback from myoclonic twitches, the phasic motor activity that characterizes AS, promotes coherent theta oscillations (4-8 Hz) in the hippocampus and red nucleus, a midbrain motor structure. Sensory feedback from twitches also triggers rhythmic activity in sensorimotor cortex in the form of spindle bursts, which are brief oscillatory events composed of rhythmic components in the theta, alpha/beta (8-20 Hz), and beta2 (20-30 Hz) bands. Here we ask whether one or more of these spindle-burst components are communicated from sensorimotor cortex to hippocampus. By recording simultaneously from whisker barrel cortex and dorsal hippocampus in 8-day-old rats, we show that AS, but not other behavioral states, promotes cortico-hippocampal coherence specifically in the beta2 band. By cutting the infraorbital nerve to prevent the conveyance of sensory feedback from whisker twitches, cortical-hippocampal beta2 coherence during AS was substantially reduced. These results demonstrate the necessity of sensory input, particularly during AS, for coordinating rhythmic activity between these two developing forebrain structures.
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Affiliation(s)
- Carlos Del Rio-Bermudez
- Department of Psychological and Brain Sciences, University of Iowa, Iowa City, IA 52242, USA
| | - Jangjin Kim
- Department of Psychological and Brain Sciences, University of Iowa, Iowa City, IA 52242, USA
| | - Greta Sokoloff
- Department of Psychological and Brain Sciences, University of Iowa, Iowa City, IA 52242, USA
- Iowa Neuroscience Institute, University of Iowa, Iowa City, IA 52242, USA
| | - Mark S Blumberg
- Department of Psychological and Brain Sciences, University of Iowa, Iowa City, IA 52242, USA
- Iowa Neuroscience Institute, University of Iowa, Iowa City, IA 52242, USA
- Interdisciplinary Graduate Program in Neuroscience, University of Iowa, Iowa City, IA 52245, USA
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16
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Negrón-Oyarzo I, Espinosa N, Aguilar-Rivera M, Fuenzalida M, Aboitiz F, Fuentealba P. Coordinated prefrontal-hippocampal activity and navigation strategy-related prefrontal firing during spatial memory formation. Proc Natl Acad Sci U S A 2018; 115:7123-7128. [PMID: 29915053 PMCID: PMC6142212 DOI: 10.1073/pnas.1720117115] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Learning the location of relevant places in the environment is crucial for survival. Such capacity is supported by a distributed network comprising the prefrontal cortex and hippocampus, yet it is not fully understood how these structures cooperate during spatial reference memory formation. Hence, we examined neural activity in the prefrontal-hippocampal circuit in mice during acquisition of spatial reference memory. We found that interregional oscillatory coupling increased with learning, specifically in the slow-gamma frequency (20 to 40 Hz) band during spatial navigation. In addition, mice used both spatial and nonspatial strategies to navigate and solve the task, yet prefrontal neuronal spiking and oscillatory phase coupling were selectively enhanced in the spatial navigation strategy. Lastly, a representation of the behavioral goal emerged in prefrontal spiking patterns exclusively in the spatial navigation strategy. These results suggest that reference memory formation is supported by enhanced cortical connectivity and evolving prefrontal spiking representations of behavioral goals.
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Affiliation(s)
- Ignacio Negrón-Oyarzo
- Instituto de Fisiología, and Centro de Neurobiología y Fisiopatología Integrativa, Facultad de Ciencias, Universidad de Valparaíso, 2340000 Valparaíso, Chile
- Centro Integrativo de Neurociencias y Departamento de Psiquiatría, Pontificia Universidad Católica de Chile, 8330024 Santiago, Chile
| | - Nelson Espinosa
- Centro Integrativo de Neurociencias y Departamento de Psiquiatría, Pontificia Universidad Católica de Chile, 8330024 Santiago, Chile
| | - Marcelo Aguilar-Rivera
- Centro Integrativo de Neurociencias y Departamento de Psiquiatría, Pontificia Universidad Católica de Chile, 8330024 Santiago, Chile
| | - Marco Fuenzalida
- Instituto de Fisiología, and Centro de Neurobiología y Fisiopatología Integrativa, Facultad de Ciencias, Universidad de Valparaíso, 2340000 Valparaíso, Chile
| | - Francisco Aboitiz
- Centro Integrativo de Neurociencias y Departamento de Psiquiatría, Pontificia Universidad Católica de Chile, 8330024 Santiago, Chile
| | - Pablo Fuentealba
- Centro Integrativo de Neurociencias y Departamento de Psiquiatría, Pontificia Universidad Católica de Chile, 8330024 Santiago, Chile;
- Centro de Investigación en Nanotecnología y Materiales Avanzados, Pontificia Universidad Católica de Chile, 7820436 Santiago, Chile
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17
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Lockmann ALV, Laplagne DA, Tort ABL. Olfactory bulb drives respiration-coupled beta oscillations in the rat hippocampus. Eur J Neurosci 2017; 48:2663-2673. [DOI: 10.1111/ejn.13665] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 08/08/2017] [Accepted: 08/09/2017] [Indexed: 11/28/2022]
Affiliation(s)
- André L. V. Lockmann
- Brain Institute; Federal University of Rio Grande do Norte; Avenida Nascimento de Castro, 2155 Natal RN 59056-450 Brazil
| | - Diego A. Laplagne
- Brain Institute; Federal University of Rio Grande do Norte; Avenida Nascimento de Castro, 2155 Natal RN 59056-450 Brazil
| | - Adriano B. L. Tort
- Brain Institute; Federal University of Rio Grande do Norte; Avenida Nascimento de Castro, 2155 Natal RN 59056-450 Brazil
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18
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Hashimoto A, Sawada T, Natsume K. The change of picrotoxin-induced epileptiform discharges to the beta oscillation by carbachol in rat hippocampal slices. Biophys Physicobiol 2017; 14:137-146. [PMID: 28989834 PMCID: PMC5627988 DOI: 10.2142/biophysico.14.0_137] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 08/08/2017] [Indexed: 12/01/2022] Open
Abstract
The study aimed to determine whether and how the activation of the acetylcholine receptor affects epileptiform discharges in the CA3 region in a rat hippocampus. Picrotoxin (100 μM), a GABAA receptor antagonist, was applied to a hippocampal slice to induce epileptiform discharges. The effects of the cholinergic agonist, carbachol, on the discharges were examined at the several concentrations (1–30 μM). Carbachol had different impacts on epileptiform discharges at the different concentrations. Relatively low concentrations of carbachol (<10 μM) increased the frequency but decreased the amplitude of the discharges. At 10 μM, carbachol induced the discharges, including bursts of theta frequency oscillations. At 30 μM, carbachol could induce bursts of beta frequency oscillations instead of epileptiform discharges. The amplitudes of the oscillations were smaller than those of the discharges. Carbachol suppressed the evoked population EPSPs (pEPSPs) in a dose-dependent manner. These effects were blocked by the muscarinic cholinergic receptor antagonist atropine sulfate. The high level of muscarinic receptor activation can replace epileptiform discharges with theta or beta oscillation. These results suggest that the dose-dependent alternation of the acetylcholine receptor activation may provide the three different stages the epileptiform discharges, the bursts of theta oscillation, and the bursts of the beta oscillation.
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Affiliation(s)
- Ayumi Hashimoto
- Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu, Fukuoka 808-0196, Japan
| | - Toyohiro Sawada
- Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu, Fukuoka 808-0196, Japan
| | - Kiyohisa Natsume
- Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu, Fukuoka 808-0196, Japan
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19
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Fast Gamma Rhythms in the Hippocampus Promote Encoding of Novel Object-Place Pairings. eNeuro 2016; 3:eN-NWR-0001-16. [PMID: 27257621 PMCID: PMC4874540 DOI: 10.1523/eneuro.0001-16.2016] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Revised: 04/10/2016] [Accepted: 04/25/2016] [Indexed: 11/21/2022] Open
Abstract
Hippocampal gamma rhythms increase during mnemonic operations (Johnson and Redish, 2007; Montgomery and Buzsáki, 2007; Sederberg et al., 2007; Jutras et al., 2009; Trimper et al., 2014) and may affect memory encoding by coordinating activity of neurons that code related information (Jensen and Lisman, 2005). Here, a hippocampal-dependent, object–place association task (Clark et al., 2000; Broadbent et al., 2004; Eacott and Norman, 2004; Lee et al., 2005; Winters et al., 2008; Barker and Warburton, 2011) was used in rats to investigate how slow and fast gamma rhythms in the hippocampus relate to encoding of memories for novel object–place associations. In novel object tasks, the degree of hippocampal dependence has been reported to vary depending on the type of novelty (Eichenbaum et al., 2007; Winters et al., 2008). Therefore, gamma activity was examined during three novelty conditions: a novel object presented in a location where a familiar object had been (NO), a familiar object presented in a location where no object had been (NL), and a novel object presented in a location where no object had been (NO+NL). The strongest and most consistent effects were observed for fast gamma rhythms during the NO+NL condition. Fast gamma power, CA3–CA1 phase synchrony, and phase-locking of place cell spikes increased during exploration of novel, compared to familiar, object–place associations. Additionally, place cell spiking during exploration of novel object–place pairings was increased when fast gamma rhythms were present. These results suggest that fast gamma rhythms promote encoding of memories for novel object–place associations.
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20
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Baud MO, Parafita J, Nguyen A, Magistretti PJ, Petit JM. Sleep fragmentation alters brain energy metabolism without modifying hippocampal electrophysiological response to novelty exposure. J Sleep Res 2016; 25:583-590. [PMID: 27136914 DOI: 10.1111/jsr.12419] [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: 06/25/2015] [Accepted: 02/13/2016] [Indexed: 02/06/2023]
Abstract
Sleep is viewed as a fundamental restorative function of the brain, but its specific role in neural energy budget remains poorly understood. Sleep deprivation dampens brain energy metabolism and impairs cognitive functions. Intriguingly, sleep fragmentation, despite normal total sleep duration, has a similar cognitive impact, and in this paper we ask the question of whether it may also impair brain energy metabolism. To this end, we used a recently developed mouse model of 2 weeks of sleep fragmentation and measured 2-deoxy-glucose uptake and glycogen, glucose and lactate concentration in different brain regions. In order to homogenize mice behaviour during metabolic measurements, we exposed them to a novel environment for 1 h. Using an intra-hippocampal electrode, we first showed that hippocampal electroencephalograph (EEG) response to exploration was unaltered by 1 or 14 days of sleep fragmentation. However, after 14 days, sleep fragmented mice exhibited a lower uptake of 2-deoxy-glucose in cortex and hippocampus and lower cortical lactate levels than control mice. Our results suggest that long-term sleep fragmentation impaired brain metabolism to a similar extent as total sleep deprivation without affecting the neuronal responsiveness of hippocampus to a novel environment.
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Affiliation(s)
- Maxime O Baud
- LNDC, Brain Mind Institute, Faculté des Sciences de la Vie, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.,Department of Neurology, UCSF, San Francisco, CA, USA
| | - Julia Parafita
- LNDC, Brain Mind Institute, Faculté des Sciences de la Vie, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Audrey Nguyen
- LNDC, Brain Mind Institute, Faculté des Sciences de la Vie, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Pierre J Magistretti
- LNDC, Brain Mind Institute, Faculté des Sciences de la Vie, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.,BESE Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia.,Centre de Neurosciences Psychiatriques, Centre Hospitalier Universitaire Vaudois (CHUV), Prilly, Switzerland
| | - Jean-Marie Petit
- LNDC, Brain Mind Institute, Faculté des Sciences de la Vie, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland. .,Centre de Neurosciences Psychiatriques, Centre Hospitalier Universitaire Vaudois (CHUV), Prilly, Switzerland.
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21
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França ASC, Muratori L, Nascimento GC, Pereira CM, Ribeiro S, Lobão-Soares B. Object recognition impairment and rescue by a dopamine D2 antagonist in hyperdopaminergic mice. Behav Brain Res 2016; 308:211-6. [PMID: 27059337 DOI: 10.1016/j.bbr.2016.04.009] [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: 09/04/2015] [Revised: 03/29/2016] [Accepted: 04/04/2016] [Indexed: 12/12/2022]
Abstract
Genetically-modified mice without the dopamine transporter (DAT) are hyperdopaminergic, and serve as models for studies of addiction, mania and hyperactive disorders. Here we investigated the capacity for object recognition in mildly hyperdopaminergic mice heterozygous for DAT (DAT +/-), with synaptic dopaminergic levels situated between those shown by DAT -/- homozygous and wild-type (WT) mice. We used a classical dopamine D2 antagonist, haloperidol, to modulate the levels of dopaminergic transmission in a dose-dependent manner, before or after exploring novel objects. In comparison with WT mice, DAT +/- mice showed a deficit in object recognition upon subsequent testing 24h later. This deficit was compensated by a single 0.05mg/kg haloperidol injection 30min before training. In all mice, a 0.3mg/kg haloperidol injected immediately after training impaired object recognition. The results indicate that a mild enhancement of dopaminergic levels can be detrimental to object recognition, and that this deficit can be rescued by a low dose of a D2 dopamine receptor antagonist. This suggests that novel object recognition is optimal at intermediate levels of D2 receptor activity.
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Affiliation(s)
- Arthur S C França
- Brain Institute, Federal University of Rio Grande do Norte, RN 59056-450, Brazil
| | - Larissa Muratori
- Biochemistry Department, Federal University of Rio Grande do Norte, Brazil
| | | | | | - Sidarta Ribeiro
- Brain Institute, Federal University of Rio Grande do Norte, RN 59056-450, Brazil
| | - Bruno Lobão-Soares
- Biophysics and Pharmacology Department, Federal University of Rio Grande do Norte, RN 59078-970, Brazil.
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22
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Naderi M, Jamwal A, Chivers DP, Niyogi S. Modulatory effects of dopamine receptors on associative learning performance in zebrafish (Danio rerio). Behav Brain Res 2016; 303:109-19. [DOI: 10.1016/j.bbr.2016.01.034] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 01/14/2016] [Accepted: 01/15/2016] [Indexed: 12/14/2022]
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23
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Dinocourt C, Legrand M, Dublineau I, Lestaevel P. The neurotoxicology of uranium. Toxicology 2015; 337:58-71. [PMID: 26277741 DOI: 10.1016/j.tox.2015.08.004] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 08/05/2015] [Accepted: 08/11/2015] [Indexed: 11/26/2022]
Abstract
The brain is a target of environmental toxic pollutants that impair cerebral functions. Uranium is present in the environment as a result of natural deposits and release by human applications. The first part of this review describes the passage of uranium into the brain, and its effects on neurological functions and cognitive abilities. Very few human studies have looked at its cognitive effects. Experimental studies show that after exposure, uranium can reach the brain and lead to neurobehavioral impairments, including increased locomotor activity, perturbation of the sleep-wake cycle, decreased memory, and increased anxiety. The mechanisms underlying these neurobehavioral disturbances are not clearly understood. It is evident that there must be more than one toxic mechanism and that it might include different targets in the brain. In the second part, we therefore review the principal mechanisms that have been investigated in experimental models: imbalance of the anti/pro-oxidant system and neurochemical and neurophysiological pathways. Uranium effects are clearly specific according to brain area, dose, and time. Nonetheless, this review demonstrates the paucity of data about its effects on developmental processes and the need for more attention to the consequences of exposure during development.
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Affiliation(s)
- Céline Dinocourt
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Pôle de la Radioprotection de l'Homme, Service de Radiobiologie et d'Epidémiologie, Laboratoire de Radiotoxicologie Expérimentale, BP 17, F-92262 Fontenay-aux-Roses, France.
| | - Marie Legrand
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Pôle de la Radioprotection de l'Homme, Service de Radiobiologie et d'Epidémiologie, Laboratoire de Radiotoxicologie Expérimentale, BP 17, F-92262 Fontenay-aux-Roses, France.
| | - Isabelle Dublineau
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Pôle de la Radioprotection de l'Homme, Service de Radiobiologie et d'Epidémiologie, Laboratoire de Radiotoxicologie Expérimentale, BP 17, F-92262 Fontenay-aux-Roses, France.
| | - Philippe Lestaevel
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Pôle de la Radioprotection de l'Homme, Service de Radiobiologie et d'Epidémiologie, Laboratoire de Radiotoxicologie Expérimentale, BP 17, F-92262 Fontenay-aux-Roses, France.
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Biased mGlu5-Positive Allosteric Modulators Provide In Vivo Efficacy without Potentiating mGlu5 Modulation of NMDAR Currents. Neuron 2015; 86:1029-1040. [PMID: 25937172 DOI: 10.1016/j.neuron.2015.03.063] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 02/22/2015] [Accepted: 03/24/2015] [Indexed: 12/14/2022]
Abstract
Schizophrenia is associated with disruptions in N-methyl-D-aspartate glutamate receptor subtype (NMDAR)-mediated excitatory synaptic signaling. The metabotropic glutamate receptor subtype 5 (mGlu5) is a closely associated signaling partner with NMDARs and regulates NMDAR function in forebrain regions implicated in the pathology of schizophrenia. Efficacy of mGlu5 positive allosteric modulators (PAMs) in animal models of psychosis and cognition was previously attributed to potentiation of NMDAR function. To directly test this hypothesis, we identified VU0409551 as a novel mGlu5 PAM that exhibits distinct stimulus bias and selectively potentiates mGlu5 coupling to Gαq-mediated signaling but not mGlu5 modulation of NMDAR currents or NMDAR-dependent synaptic plasticity in the rat hippocampus. Interestingly, VU0409551 produced robust antipsychotic-like and cognition-enhancing activity in animal models. These data provide surprising new mechanistic insights into the actions of mGlu5 PAMs and suggest that modulation of NMDAR currents is not critical for in vivo efficacy. VIDEO ABSTRACT.
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25
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França ASC, Lobão-Soares B, Muratori L, Nascimento G, Winne J, Pereira CM, Jeronimo SMB, Ribeiro S. D2 dopamine receptor regulation of learning, sleep and plasticity. Eur Neuropsychopharmacol 2015; 25:493-504. [PMID: 25778861 DOI: 10.1016/j.euroneuro.2015.01.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 01/08/2015] [Accepted: 01/16/2015] [Indexed: 01/23/2023]
Abstract
Dopamine and sleep have been independently linked with hippocampus-dependent learning. Since D2 dopaminergic transmission is required for the occurrence of rapid-eye-movement (REM) sleep, it is possible that dopamine affects learning by way of changes in post-acquisition REM sleep. To investigate this hypothesis, we first assessed whether D2 dopaminergic modulation in mice affects novel object preference, a hippocampus-dependent task. Animals trained in the dark period, when sleep is reduced, did not improve significantly in performance when tested 24h after training. In contrast, animals trained in the sleep-rich light period showed significant learning after 24h. When injected with the D2 inverse agonist haloperidol immediately after the exploration of novel objects, animals trained in the light period showed reduced novelty preference upon retesting 24h later. Next we investigated whether haloperidol affected the protein levels of plasticity factors shown to be up-regulated in an experience-dependent manner during REM sleep. Haloperidol decreased post-exploration hippocampal protein levels at 3h, 6h and 12h for phosphorylated Ca(2+)/calmodulin-dependent protein kinase II, at 6h for Zif-268; and at 12h for the brain-derived neurotrophic factor. Electrophysiological and kinematic recordings showed a significant decrease in the amount of REM sleep following haloperidol injection, while slow-wave sleep remained unaltered. Importantly, REM sleep decrease across animals was strongly correlated with deficits in novelty preference (Rho=0.56, p=0.012). Altogether, the results suggest that the dopaminergic regulation of REM sleep affects learning by modulating post-training levels of calcium-dependent plasticity factors.
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Affiliation(s)
- A S C França
- Brain Institute, Federal University of Rio Grande do Norte (UFRN), 59056-450 Natal, RN, Brazil
| | - B Lobão-Soares
- Department of Biophysics and Pharmacology, Federal University of Rio Grande do Norte (UFRN), Brazil.
| | - L Muratori
- Brain Institute, Federal University of Rio Grande do Norte (UFRN), 59056-450 Natal, RN, Brazil; Department of Biochemistry, Federal University of Rio Grande do Norte (UFRN), Brazil
| | - G Nascimento
- Department of Biomedical Engineering, Federal University of Rio Grande do Norte (UFRN), Brazil; Edmond and Lily Safra International Institute of Neuroscience of Natal (ELS-IINN), Natal, RN, Brazil
| | - J Winne
- Edmond and Lily Safra International Institute of Neuroscience of Natal (ELS-IINN), Natal, RN, Brazil
| | - C M Pereira
- Edmond and Lily Safra International Institute of Neuroscience of Natal (ELS-IINN), Natal, RN, Brazil
| | - S M B Jeronimo
- Department of Biochemistry, Federal University of Rio Grande do Norte (UFRN), Brazil
| | - S Ribeiro
- Brain Institute, Federal University of Rio Grande do Norte (UFRN), 59056-450 Natal, RN, Brazil.
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The use of EEG parameters as predictors of drug effects on cognition. Eur J Pharmacol 2015; 759:163-8. [PMID: 25823806 DOI: 10.1016/j.ejphar.2015.03.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Revised: 03/06/2015] [Accepted: 03/12/2015] [Indexed: 11/22/2022]
Abstract
It has been shown to be difficult to predict whether cognition-enhancing effects of drugs in animal studies have the same effect in humans. Various issues in translating findings from animal to human studies can be identified. Here we discuss whether EEG could be considered as a possible tool to translate the effects of cognition enhancers across species. Three different aspects of EEG measures are evaluated: frequency bands, event-related potentials, and coherence analysis. On basis of the comparison of these measures between species, and effects of drugs that improve or impair memory performance (mainly cholinergic drugs), it appears that event-related potentials and coherence analyses could be considered as potential translational tools to study cognition-enhancing drug effects in rodents and animals.
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