1
|
Kesner AJ, Mozaffarilegha M, Thirtamara Rajamani K, Arima Y, Harony-Nicolas H, Hashimotodani Y, Ito HT, Song J, Ikemoto S. Hypothalamic Supramammillary Control of Cognition and Motivation. J Neurosci 2023; 43:7538-7546. [PMID: 37940587 PMCID: PMC10634554 DOI: 10.1523/jneurosci.1320-23.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/07/2023] [Accepted: 08/21/2023] [Indexed: 11/10/2023] Open
Abstract
The supramammillary nucleus (SuM) is a small region in the ventromedial posterior hypothalamus. The SuM has been relatively understudied with much of the prior focus being on its connection with septo-hippocampal circuitry. Thus, most studies conducted until the 21st century examined its role in hippocampal processes, such as theta rhythm and learning/memory. In recent years, the SuM has been "rediscovered" as a crucial hub for several behavioral and cognitive processes, including reward-seeking, exploration, and social memory. Additionally, it has been shown to play significant roles in hippocampal plasticity and adult neurogenesis. This review highlights findings from recent studies using cutting-edge systems neuroscience tools that have shed light on these fascinating roles for the SuM.
Collapse
Affiliation(s)
- Andrew J Kesner
- Unit on Motivation and Arousal, Laboratory for Integrative Neuroscience, National Institute on Alcohol Abuse and Alcoholism, Intramural Research Program, National Institutes of Health, Bethesda, Maryland 20892
| | | | - Keerthi Thirtamara Rajamani
- Appel Alzheimer's Disease Research Institute, Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, New York 10021
| | - Yosuke Arima
- Neurocircuitry of Motivation Section, Behavioral Neuroscience Research Branch, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, Maryland 21224
- Center on Compulsive Behaviors, Intramural Research Program, National Institutes of Health, Bethesda, Maryland 20894
| | - Hala Harony-Nicolas
- Department of Psychiatry, Department of Neuroscience, Seaver Autism Center for Research and Treatment, Friedman Brain Institute, Mindich Child Health and Development Institute at the Icahn School of Medicine at Mount Sinai, New York, New York 10029
| | - Yuki Hashimotodani
- Graduate School of Brain Science, Doshisha University, Kyotanabe, Kyoto Japan 610-0394
| | - Hiroshi T Ito
- Max Planck Institute for Brain Research, Frankfurt am Main, Germany 60438
| | - Juan Song
- Department of Pharmacology, University of North Carolina, Chapel Hill, North Carolina 27599
- Neuroscience Center, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Satoshi Ikemoto
- Neurocircuitry of Motivation Section, Behavioral Neuroscience Research Branch, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, Maryland 21224
| |
Collapse
|
2
|
Coray R, Quednow BB. The role of serotonin in declarative memory: A systematic review of animal and human research. Neurosci Biobehav Rev 2022; 139:104729. [PMID: 35691469 DOI: 10.1016/j.neubiorev.2022.104729] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 05/13/2022] [Accepted: 06/06/2022] [Indexed: 10/18/2022]
Abstract
The serotonergic system is involved in diverse cognitive functions including memory. Of particular importance to daily life are declarative memories that contain information about personal experiences, general facts, and events. Several psychiatric or neurological diseases, such as depression, attention-deficit-hyperactivity disorder (ADHD), and dementia, show alterations in serotonergic signalling and attendant memory disorders. Nevertheless, understanding serotonergic neurotransmission and its influence on memory remained a challenge until today. In this systematic review, we summarize recent psychopharmacological studies in animals and humans from a psychological memory perspective, in consideration of task-specific requirements. This approach has the advantage that comparisons between serotonin (5-HT)-related neurochemical mechanisms and manipulations are each addressing specific mnemonic circuits. We conclude that applications of the same 5-HT-related treatments can differentially affect unrelated tasks of declarative memories. Moreover, the analysis of specific mnemonic phases (e.g., encoding vs. consolidation) reveals opposing impacts of increased or decreased 5-HT tones, with low 5-HT supporting spatial encoding but impairing the consolidation of objects and verbal memories. Promising targets for protein synthesis-dependent consolidation enhancements include 5-HT4 receptor agonists and 5-HT6 receptor antagonists, with the latter being of special interest for the treatment of age-related decline. Further implications are pointed out as base for the development of novel therapeutic targets for memory impairment of neuropsychiatric disorders.
Collapse
Affiliation(s)
- Rebecca Coray
- Experimental and Clinical Pharmacopsychology, Department of Psychiatry, Psychotherapy, and Psychosomatics, Psychiatric University Hospital Zurich, University of Zurich, Switzerland; Neuroscience Center Zurich, University of Zurich and Swiss Federal Institute of Technology Zurich, Switzerland.
| | - Boris B Quednow
- Experimental and Clinical Pharmacopsychology, Department of Psychiatry, Psychotherapy, and Psychosomatics, Psychiatric University Hospital Zurich, University of Zurich, Switzerland; Neuroscience Center Zurich, University of Zurich and Swiss Federal Institute of Technology Zurich, Switzerland
| |
Collapse
|
3
|
Aguggia JP, Cornejo MP, Fernandez G, De Francesco PN, Mani BK, Cassano D, Cabral A, Valdivia S, García Romero G, Reynaldo M, Fehrentz JA, Zigman JM, Perello M. Growth hormone secretagogue receptor signaling in the supramammillary nucleus targets nitric oxide-producing neurons and controls recognition memory in mice. Psychoneuroendocrinology 2022; 139:105716. [PMID: 35290931 DOI: 10.1016/j.psyneuen.2022.105716] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 02/21/2022] [Accepted: 03/07/2022] [Indexed: 11/27/2022]
Abstract
Ghrelin is a stomach-derived hormone that acts via the growth hormone secretagogue receptor (GHSR). Recent evidence suggests that some of ghrelin's actions may be mediated via the supramammillary nucleus (SuM). Not only does ghrelin bind to cells within the mouse SuM, but ghrelin also activates SuM cells and intra-SuM ghrelin administration induces feeding in rats. In the current study, we aimed to further characterize ghrelin action in the SuM. We first investigated a mouse model expressing enhanced green fluorescent protein (eGFP) under the promoter of GHSR (GHSR-eGFP mice). We found that the SuM of GHSR-eGFP mice contains a significant amount of eGFP cells, some of which express neuronal nitric oxide synthase. Centrally-, but not systemically-, injected ghrelin reached the SuM, where it induced c-Fos expression. Furthermore, a 5-day 40% calorie restriction protocol, but not a 2-day fast, increased c-Fos expression in non-eGFP+ cells of the SuM of GHSR-eGFP mice, whereas c-Fos induction by calorie restriction was not observed in GHSR-deficient mice. Exposure of satiated mice to a binge-like eating protocol also increased c-Fos expression in non-eGFP+ cells of the SuM of GHSR-eGFP mice in a GHSR-dependent manner. Finally, intra-SuM-injected ghrelin did not acutely affect food intake, locomotor activity, behavioral arousal or spatial memory but increased recognition memory. Thus, we provide a compelling neuroanatomical characterization of GHSR SuM neurons and its behavioral implications in mice.
Collapse
Affiliation(s)
- Julieta P Aguggia
- Laboratory of Neurophysiology of the Multidisciplinary Institute of Cell Biology [IMBICE, Argentine Research Council (CONICET) and Scientific Research Commission, Province of Buenos Aires (CIC-PBA), National University of La Plata], La Plata, Buenos Aires, Argentina
| | - María P Cornejo
- Laboratory of Neurophysiology of the Multidisciplinary Institute of Cell Biology [IMBICE, Argentine Research Council (CONICET) and Scientific Research Commission, Province of Buenos Aires (CIC-PBA), National University of La Plata], La Plata, Buenos Aires, Argentina
| | - Gimena Fernandez
- Laboratory of Neurophysiology of the Multidisciplinary Institute of Cell Biology [IMBICE, Argentine Research Council (CONICET) and Scientific Research Commission, Province of Buenos Aires (CIC-PBA), National University of La Plata], La Plata, Buenos Aires, Argentina
| | - Pablo N De Francesco
- Laboratory of Neurophysiology of the Multidisciplinary Institute of Cell Biology [IMBICE, Argentine Research Council (CONICET) and Scientific Research Commission, Province of Buenos Aires (CIC-PBA), National University of La Plata], La Plata, Buenos Aires, Argentina
| | - Bharath K Mani
- Center for Hypothalamic Research, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX, USA
| | - Daniela Cassano
- Laboratory of Neurophysiology of the Multidisciplinary Institute of Cell Biology [IMBICE, Argentine Research Council (CONICET) and Scientific Research Commission, Province of Buenos Aires (CIC-PBA), National University of La Plata], La Plata, Buenos Aires, Argentina
| | - Agustina Cabral
- Laboratory of Neurophysiology of the Multidisciplinary Institute of Cell Biology [IMBICE, Argentine Research Council (CONICET) and Scientific Research Commission, Province of Buenos Aires (CIC-PBA), National University of La Plata], La Plata, Buenos Aires, Argentina
| | - Spring Valdivia
- Laboratory of Neurophysiology of the Multidisciplinary Institute of Cell Biology [IMBICE, Argentine Research Council (CONICET) and Scientific Research Commission, Province of Buenos Aires (CIC-PBA), National University of La Plata], La Plata, Buenos Aires, Argentina
| | - Guadalupe García Romero
- Laboratory of Neurophysiology of the Multidisciplinary Institute of Cell Biology [IMBICE, Argentine Research Council (CONICET) and Scientific Research Commission, Province of Buenos Aires (CIC-PBA), National University of La Plata], La Plata, Buenos Aires, Argentina
| | - Mirta Reynaldo
- Laboratory of Neurophysiology of the Multidisciplinary Institute of Cell Biology [IMBICE, Argentine Research Council (CONICET) and Scientific Research Commission, Province of Buenos Aires (CIC-PBA), National University of La Plata], La Plata, Buenos Aires, Argentina
| | - Jean-Alain Fehrentz
- Institut des Biomolécules Max Mousseron, UMR 5247 CNRS-Université Montpellier-ENSCM, Faculté de Pharmacie, Montpellier, France
| | - Jeffrey M Zigman
- Center for Hypothalamic Research, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX, USA
| | - Mario Perello
- Laboratory of Neurophysiology of the Multidisciplinary Institute of Cell Biology [IMBICE, Argentine Research Council (CONICET) and Scientific Research Commission, Province of Buenos Aires (CIC-PBA), National University of La Plata], La Plata, Buenos Aires, Argentina; Department of Surgical Sciences, Functional Pharmacology and Neuroscience, University of Uppsala, Uppsala, Sweden.
| |
Collapse
|
4
|
Hones VI, Mizumori SJY. Response Flexibility: The Role of the Lateral Habenula. Front Behav Neurosci 2022; 16:852235. [PMID: 35444521 PMCID: PMC9014270 DOI: 10.3389/fnbeh.2022.852235] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 03/01/2022] [Indexed: 01/13/2023] Open
Abstract
The ability to make appropriate decisions that result in an optimal outcome is critical for survival. This process involves assessing the environment as well as integrating prior knowledge about the environment with information about one's current internal state. There are many neural structures that play critical roles in mediating these processes, but it is not yet known how such information coalesces to influence behavioral output. The lateral habenula (LHb) has often been cited as a structure critical for adaptive and flexible responding when environmental contexts and internal state changes. A challenge, however, has been understanding how LHb promotes response flexibility. In this review, we hypothesize that the LHb enables flexible responding following the integration of context memory and internal state information by signaling downstream brainstem structures known to drive hippocampal theta. In this way, animals respond more flexibly in a task situation not because the LHb selects a particular action, but rather because LHb enhances a hippocampal neural state that is often associated with greater attention, arousal, and exploration. In freely navigating animals, these are essential conditions that are needed to discover and implement appropriate alternative choices and behaviors. As a corollary to our hypothesis, we describe short- and intermediate-term functions of the LHb. Finally, we discuss the effects on the behavior of LHb dysfunction in short- and intermediate-timescales, and then suggest that new therapies may act on the LHb to alleviate the behavioral impairments following long-term LHb disruption.
Collapse
Affiliation(s)
- Victoria I. Hones
- Department of Psychology, University of Washington, Seattle, WA, United States
| | - Sheri J. Y. Mizumori
- Department of Psychology, University of Washington, Seattle, WA, United States
- Graduate Program in Neuroscience, University of Washington, Seattle, WA, United States
| |
Collapse
|
5
|
The Role of the Posterior Hypothalamus in the Modulation and Production of Rhythmic Theta Oscillations. Neuroscience 2021; 470:100-115. [PMID: 34271089 DOI: 10.1016/j.neuroscience.2021.07.001] [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] [Received: 03/01/2021] [Revised: 06/18/2021] [Accepted: 07/05/2021] [Indexed: 11/24/2022]
Abstract
Theta rhythm recorded as an extracellular synchronous field potential is generated in a number of brain sites including the hippocampus. The physiological occurrence of hippocampal theta rhythm is associated with the activation of a number of structures forming the ascending brainstem-hippocampal synchronizing pathway. Experimental evidence indicates that the supramammillary nucleus and posterior hypothalamic nuclei, considered as the posterior hypothalamic area, comprise a critical node of this ascending pathway. The posterior hypothalamic area plays an important role in movement control, place-learning, memory processing, emotion and arousal. In the light of multiplicity of functions of the posterior hypothalamic area and the influence of theta field oscillations on a number of neural processes, it is the authors' intent to summarize the data concerning the involvement of the supramammillary nucleus and posterior hypothalamic nuclei in the modulation of limbic theta rhythmicity as well as the ability of these brain structures to independently generate theta rhythmicity.
Collapse
|
6
|
Staszelis A, Kowalczyk T. The role of the posterior hypothalamic area
in the generation of theta rhythm. POSTEP HIG MED DOSW 2021. [DOI: 10.5604/01.3001.0014.9333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Theta rhythm is one of the best synchronized patterns of the oscillatory activity recorded in
the mammalian brain. In humans, this rhythm is associated with REM sleep, spatial navigation,
memory functions, analytical and language processes. On the other hand, it can be treated as
a non-specific marker of such pathological states of the central nervous system as Alzheimer’s
disease or epilepsy. The hippocampal formation is the key structure involved in the generation
of this bioelectric phenomenon, both in humans and rodents (the most commonly studied laboratory
animals). Theta rhythm appearance in the hippocampus is dependent on the interaction
of multiple different structures of the nervous system. One of them is the posterior hypothalamic
area (PHa), which constitutes a crucial part of the neuronal system modulating the ability
of the hippocampal formation to generate theta rhythm. Although the research results encompassed
in this paper emphasize the essential role of the PHa as a modulator of the hippocampal
theta rhythm, it was the authors’ intent to indicate that this area is also capable of generating
local rhythmical theta oscillations, independently of the influence of other brain structures.
Collapse
Affiliation(s)
- Agata Staszelis
- Katedra Neurobiologii, Wydział Biologii i Ochrony Środowiska, Uniwersytet Łódzki, Łódź
| | - Tomasz Kowalczyk
- Katedra Neurobiologii, Wydział Biologii i Ochrony Środowiska, Uniwersytet Łódzki, Łódź
| |
Collapse
|
7
|
Carvalho MM, Tanke N, Kropff E, Witter MP, Moser MB, Moser EI. A Brainstem Locomotor Circuit Drives the Activity of Speed Cells in the Medial Entorhinal Cortex. Cell Rep 2021; 32:108123. [PMID: 32905779 PMCID: PMC7487772 DOI: 10.1016/j.celrep.2020.108123] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 05/26/2020] [Accepted: 08/18/2020] [Indexed: 12/12/2022] Open
Abstract
Locomotion activates an array of sensory inputs that may help build the self-position map of the medial entorhinal cortex (MEC). In this map, speed-coding neurons are thought to dynamically update representations of the animal’s position. A possible origin for the entorhinal speed signal is the mesencephalic locomotor region (MLR), which is critically involved in the activation of locomotor programs. Here, we describe, in rats, a circuit connecting the pedunculopontine tegmental nucleus (PPN) of the MLR to the MEC via the horizontal limb of the diagonal band of Broca (HDB). At each level of this pathway, locomotion speed is linearly encoded in neuronal firing rates. Optogenetic activation of PPN cells drives locomotion and modulates activity of speed-modulated neurons in HDB and MEC. Our results provide evidence for a pathway by which brainstem speed signals can reach cortical structures implicated in navigation and higher-order dynamic representations of space. A speed-coding multisynaptic circuit connects PPN to MEC via HDB Each level of the PPN-HDB-MEC pathway contains cells with linear speed coding Optogenetic stimulation of PPN elicits activity in HDB and MEC speed cells In MEC, locomotor inputs from PPN mainly target speed-modulated interneurons
Collapse
Affiliation(s)
- Miguel M Carvalho
- Kavli Institute for Systems Neuroscience and Centre for Neural Computation, Norwegian University of Science and Technology, Olav Kyrres Gate 9, 7491 Trondheim, Norway
| | - Nouk Tanke
- Kavli Institute for Systems Neuroscience and Centre for Neural Computation, Norwegian University of Science and Technology, Olav Kyrres Gate 9, 7491 Trondheim, Norway
| | - Emilio Kropff
- Leloir Institute, IIBBA - CONICET, Av. Patricias Argentinas 435, Buenos Aires CP C1405BWE, Argentina
| | - Menno P Witter
- Kavli Institute for Systems Neuroscience and Centre for Neural Computation, Norwegian University of Science and Technology, Olav Kyrres Gate 9, 7491 Trondheim, Norway
| | - May-Britt Moser
- Kavli Institute for Systems Neuroscience and Centre for Neural Computation, Norwegian University of Science and Technology, Olav Kyrres Gate 9, 7491 Trondheim, Norway
| | - Edvard I Moser
- Kavli Institute for Systems Neuroscience and Centre for Neural Computation, Norwegian University of Science and Technology, Olav Kyrres Gate 9, 7491 Trondheim, Norway.
| |
Collapse
|
8
|
Robert V, Therreau L, Chevaleyre V, Lepicard E, Viollet C, Cognet J, Huang AJ, Boehringer R, Polygalov D, McHugh TJ, Piskorowski RA. Local circuit allowing hypothalamic control of hippocampal area CA2 activity and consequences for CA1. eLife 2021; 10:63352. [PMID: 34003113 PMCID: PMC8154026 DOI: 10.7554/elife.63352] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 05/17/2021] [Indexed: 12/28/2022] Open
Abstract
The hippocampus is critical for memory formation. The hypothalamic supramammillary nucleus (SuM) sends long-range projections to hippocampal area CA2. While the SuM-CA2 connection is critical for social memory, how this input acts on the local circuit is unknown. Using transgenic mice, we found that SuM axon stimulation elicited mixed excitatory and inhibitory responses in area CA2 pyramidal neurons (PNs). Parvalbumin-expressing basket cells were largely responsible for the feedforward inhibitory drive of SuM over area CA2. Inhibition recruited by the SuM input onto CA2 PNs increased the precision of action potential firing both in conditions of low and high cholinergic tone. Furthermore, SuM stimulation in area CA2 modulated CA1 activity, indicating that synchronized CA2 output drives a pulsed inhibition in area CA1. Hence, the network revealed here lays basis for understanding how SuM activity directly acts on the local hippocampal circuit to allow social memory encoding.
Collapse
Affiliation(s)
- Vincent Robert
- INSERM UMR1266, Institute of Psychiatry and Neuroscience of Paris, Team Synaptic Plasticity and Neural Networks, Université de Paris, Paris, France
| | - Ludivine Therreau
- INSERM UMR1266, Institute of Psychiatry and Neuroscience of Paris, Team Synaptic Plasticity and Neural Networks, Université de Paris, Paris, France
| | - Vivien Chevaleyre
- INSERM UMR1266, Institute of Psychiatry and Neuroscience of Paris, Team Synaptic Plasticity and Neural Networks, Université de Paris, Paris, France.,GHU Paris Psychiatrie and Neurosciences, Paris, France
| | - Eude Lepicard
- INSERM UMR1266, Institute of Psychiatry and Neuroscience of Paris, Team Synaptic Plasticity and Neural Networks, Université de Paris, Paris, France
| | - Cécile Viollet
- INSERM UMR1266, Institute of Psychiatry and Neuroscience of Paris, Team Synaptic Plasticity and Neural Networks, Université de Paris, Paris, France
| | - Julie Cognet
- INSERM UMR1266, Institute of Psychiatry and Neuroscience of Paris, Team Synaptic Plasticity and Neural Networks, Université de Paris, Paris, France
| | - Arthur Jy Huang
- Laboratory for Circuit and Behavioral Physiology, RIKEN Center for Brain Science, Saitama, Japan
| | - Roman Boehringer
- Laboratory for Circuit and Behavioral Physiology, RIKEN Center for Brain Science, Saitama, Japan
| | - Denis Polygalov
- Laboratory for Circuit and Behavioral Physiology, RIKEN Center for Brain Science, Saitama, Japan
| | - Thomas J McHugh
- Laboratory for Circuit and Behavioral Physiology, RIKEN Center for Brain Science, Saitama, Japan
| | - Rebecca Ann Piskorowski
- INSERM UMR1266, Institute of Psychiatry and Neuroscience of Paris, Team Synaptic Plasticity and Neural Networks, Université de Paris, Paris, France.,GHU Paris Psychiatrie and Neurosciences, Paris, France
| |
Collapse
|
9
|
Yu X, Zhang R, Wei C, Gao Y, Yu Y, Wang L, Jiang J, Zhang X, Li J, Chen X. MCT2 overexpression promotes recovery of cognitive function by increasing mitochondrial biogenesis in a rat model of stroke. Anim Cells Syst (Seoul) 2021; 25:93-101. [PMID: 34234890 PMCID: PMC8118516 DOI: 10.1080/19768354.2021.1915379] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 02/07/2021] [Accepted: 03/26/2021] [Indexed: 10/27/2022] Open
Abstract
Monocarboxylate transporter 2 (MCT2) is the predominant monocarboxylate transporter expressed by neurons. MCT2 plays an important role in brain energy metabolism. Stroke survivors are at high risk of cognitive impairment. We reported previously that stroke-induced cognitive impairment was related to impaired energy metabolism. In the present study, we report that cognitive function was impaired after stroke in rats. We found that MCT2 expression, but not that of MCT1 or MCT4, was markedly decreased in the rat hippocampus at 7 and 28 days after transient middle cerebral artery occlusion (tMCAO). Moreover, MCT2 overexpression promoted recovery of cognitive function after stroke. The molecular mechanism underlying these effects may be related to an increase in adenosine monophosphate-activated protein kinase-mediated mitochondrial biogenesis induced by overexpression of MCT2. Our findings suggest that MCT2 activation ameliorates cognitive impairment after stroke.
Collapse
Affiliation(s)
- Xiaorong Yu
- Department of Neurology, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, People's Republic of China
| | - Rui Zhang
- Department of Neurology, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, People's Republic of China
| | - Cunsheng Wei
- Department of Neurology, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, People's Republic of China
| | - Yuanyuan Gao
- Department of General Practice, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, People's Republic of China
| | - Yanhua Yu
- Department of Neurology, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, People's Republic of China
| | - Lin Wang
- Department of Neurology, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, People's Republic of China
| | - Junying Jiang
- Department of Neurology, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, People's Republic of China
| | - Xuemei Zhang
- Department of Neurology, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, People's Republic of China
| | - Junrong Li
- Department of Neurology, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, People's Republic of China
| | - Xuemei Chen
- Department of Neurology, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, People's Republic of China
| |
Collapse
|
10
|
Silkis IG, Markevich VA. Possible Mechanisms of the Influence of the Supramillary Nucleus on the Functioning of the Dentate Gyrus and the CA2 Field of the Hippocamsus (Role of Disinhibition). NEUROCHEM J+ 2020. [DOI: 10.1134/s181971242004011x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
11
|
Billwiller F, Castillo L, Elseedy H, Ivanov AI, Scapula J, Ghestem A, Carponcy J, Libourel PA, Bras H, Abdelmeguid NE, Krook-Magnuson E, Soltesz I, Bernard C, Luppi PH, Esclapez M. GABA-glutamate supramammillary neurons control theta and gamma oscillations in the dentate gyrus during paradoxical (REM) sleep. Brain Struct Funct 2020; 225:2643-2668. [PMID: 32970253 PMCID: PMC7674372 DOI: 10.1007/s00429-020-02146-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 09/08/2020] [Indexed: 12/25/2022]
Abstract
Several studies suggest that neurons from the lateral region of the SuM (SuML) innervating the dorsal dentate gyrus (DG) display a dual GABAergic and glutamatergic transmission and are specifically activated during paradoxical (REM) sleep (PS). The objective of the present study is to characterize the anatomical, neurochemical and electrophysiological properties of the SuML-DG projection neurons and to determine how they control DG oscillations and neuronal activation during PS and other vigilance states. For this purpose, we combine structural connectivity techniques using neurotropic viral vectors (rabies virus, AAV), neurochemical anatomy (immunohistochemistry, in situ hybridization) and imaging (light, electron and confocal microscopy) with in vitro (patch clamp) and in vivo (LFP, EEG) optogenetic and electrophysiological recordings performed in transgenic VGLUT2-cre male mice. At the cellular level, we show that the SuML-DG neurons co-release GABA and glutamate on dentate granule cells and increase the activity of a subset of DG granule cells. At the network level, we show that activation of the SuML-DG pathway increases theta power and frequency during PS as well as gamma power during PS and waking in the DG. At the behavioral level, we show that the activation of this pathway does not change animal behavior during PS, induces awakening during slow wave sleep and increases motor activity during waking. These results suggest that the SuML-DG pathway is capable of supporting the increase of theta and gamma power in the DG observed during PS and plays an important modulatory role of DG network activity during this state.
Collapse
Affiliation(s)
- Francesca Billwiller
- UMR 5292 CNRS/U1028 INSERM, Centre hospitalier le vinatier, Neurocampus, University Lyon I, Bron, France
| | - Laura Castillo
- INSERM, INS, Institut de Neurosciences des Systèmes, Aix-Marseille Univ, Marseille, France
| | - Heba Elseedy
- INSERM, INS, Institut de Neurosciences des Systèmes, Aix-Marseille Univ, Marseille, France
- Zoology Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Anton Ivanovich Ivanov
- INSERM, INS, Institut de Neurosciences des Systèmes, Aix-Marseille Univ, Marseille, France
| | - Jennyfer Scapula
- INSERM, INS, Institut de Neurosciences des Systèmes, Aix-Marseille Univ, Marseille, France
| | - Antoine Ghestem
- INSERM, INS, Institut de Neurosciences des Systèmes, Aix-Marseille Univ, Marseille, France
| | - Julien Carponcy
- UMR 5292 CNRS/U1028 INSERM, Centre hospitalier le vinatier, Neurocampus, University Lyon I, Bron, France
| | - Paul Antoine Libourel
- UMR 5292 CNRS/U1028 INSERM, Centre hospitalier le vinatier, Neurocampus, University Lyon I, Bron, France
| | - Hélène Bras
- CNRS, INT, Institut de Neurosciences Timone, Aix-Marseille Univ, Marseille, France
| | | | | | - Ivan Soltesz
- Department of Neurosurgery, Stanford University, Stanford, USA
| | - Christophe Bernard
- INSERM, INS, Institut de Neurosciences des Systèmes, Aix-Marseille Univ, Marseille, France
| | - Pierre-Hervé Luppi
- UMR 5292 CNRS/U1028 INSERM, Centre hospitalier le vinatier, Neurocampus, University Lyon I, Bron, France
| | - Monique Esclapez
- INSERM, INS, Institut de Neurosciences des Systèmes, Aix-Marseille Univ, Marseille, France.
| |
Collapse
|
12
|
Phospholipase Cβ3 in the hippocampus may mediate impairment of memory by long-term blockade of orexin 1 receptors assessed by the Morris water maze. Life Sci 2020; 257:118046. [PMID: 32622948 DOI: 10.1016/j.lfs.2020.118046] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/19/2020] [Accepted: 06/30/2020] [Indexed: 11/23/2022]
Abstract
Orexin-A is an endogenous peptide with receptors throughout the brain. According to some recent research, learning and memory are affected by the central administration of orexin; however, no study so far has investigated the long-term inhibition of the orexinergic system. The present study has evaluated the effect of pretraining administration of orexin 1 receptor (OXR1) antagonist, SB-334867, on the acquisition of memory. The Morris water maze (MWM) task was used for training and trial purposes in all groups. Memory performance was analyzed by measuring escape latency, traveled distance, and time spent in the target quadrant. Moreover, the effect of SB-334867 on phospholipase Cβ3 (PLCβ3) levels in the CA1 region of hippocampus slices was examined. Hippocampus slices were prepared using an immunohistochemistry (IHC) approach. SB-334867 (20 mg/kg) increased escape latency in SB-treated rats compared to SB-vehicle group (P < 0.01). SB-treated rats spent less time in the target quadrant compared to the SB-vehicle group (P < 0.001). Distance traveled in the target quadrant was significantly more in SB-treated rats compared to the SB-vehicle group (P < 0.001). Furthermore, SB-334867 decreased PLCβ3 levels in the CA1 of the hippocampus (P < 0.01 and P < 0.05, respectively). Put together, our results suggest that the long-term inhibition of OXR1 plays a prominent role in spatial learning and memory, probably by attenuating PLCβ3 in CA1 neurons.
Collapse
|
13
|
Vicente AF, Slézia A, Ghestem A, Bernard C, Quilichini PP. In Vivo Characterization of Neurophysiological Diversity in the Lateral Supramammillary Nucleus during Hippocampal Sharp-wave Ripples of Adult Rats. Neuroscience 2020; 435:95-111. [PMID: 32222556 DOI: 10.1016/j.neuroscience.2020.03.034] [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] [Received: 12/25/2019] [Revised: 02/13/2020] [Accepted: 03/22/2020] [Indexed: 01/12/2023]
Abstract
The extent of the networks that control the genesis and modulation of hippocampal sharp-wave ripples (SPW-Rs), which are involved in memory consolidation, remains incompletely understood. Here, we performed a detailed in vivo analysis of single cell firing in the lateral supramammillary nucleus (lSuM) during theta and slow oscillations, including SPW-Rs, in anesthetized rats. We classified neurons as SPW-R-active and SPW-R-unchanged according to whether or not they increased their firing during SPW-Rs. We show that lSuM SPW-R-active neurons increase their firing prior to SPW-Rs peak power and prior to hippocampal excitatory cell activation. Moreover, lSuM SPW-R-active neurons show increased firing activity during theta and slow oscillations as compared to unchanged neurons. These results suggest that a sub-population of lSuM neurons can interact with the hippocampus during SPW-Rs, raising the possibility that the lSuM may modulate memory consolidation.
Collapse
Affiliation(s)
- Ana F Vicente
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France.
| | - Andrea Slézia
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France
| | - Antoine Ghestem
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France
| | | | | |
Collapse
|
14
|
Hashimotodani Y, Karube F, Yanagawa Y, Fujiyama F, Kano M. Supramammillary Nucleus Afferents to the Dentate Gyrus Co-release Glutamate and GABA and Potentiate Granule Cell Output. Cell Rep 2019; 25:2704-2715.e4. [PMID: 30517859 DOI: 10.1016/j.celrep.2018.11.016] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 08/28/2018] [Accepted: 10/31/2018] [Indexed: 10/27/2022] Open
Abstract
The supramammillary nucleus (SuM) of the hypothalamus projects to the dentate gyrus (DG) and the CA2 region of the hippocampus. Although the SuM-to-hippocampus circuits have been implicated in spatial and emotional memory formation, little is known about precise neural connections between the SuM and hippocampus. Here, we report that axons of SuM neurons make monosynaptic connections to granule cells (GCs) and GABAergic interneurons, but not to hilar mossy cells, in the DG and co-release glutamate and γ-aminobutyric acid (GABA) at these synapses. Although inputs from the SuM can excite some interneurons, the inputs alone fail to generate spikes in GCs. However, despite the insufficient excitatory drive and GABAergic co-transmission, SuM inputs have net excitatory effects on GCs and can potentiate GC firing when temporally associated with perforant path inputs. Our results indicate that the SuM influences DG information processing by modulating GC outputs.
Collapse
Affiliation(s)
- Yuki Hashimotodani
- Department of Neurophysiology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan; Laboratory of Molecular Synaptic Function, Graduate School of Brain Science, Doshisha University, Kyotanabe 610-0394, Japan.
| | - Fuyuki Karube
- Laboratory of Neural Circuitry, Graduate School of Brain Science, Doshisha University, Kyotanabe 610-0394, Japan
| | - Yuchio Yanagawa
- Department of Genetic and Behavioral Neuroscience, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
| | - Fumino Fujiyama
- Laboratory of Neural Circuitry, Graduate School of Brain Science, Doshisha University, Kyotanabe 610-0394, Japan
| | - Masanobu Kano
- Department of Neurophysiology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan; International Research Center for Neurointelligence (WPI-IRCN), The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo, Tokyo 113-0033, Japan.
| |
Collapse
|
15
|
Tzakis N, Holahan MR. Social Memory and the Role of the Hippocampal CA2 Region. Front Behav Neurosci 2019; 13:233. [PMID: 31632251 PMCID: PMC6779725 DOI: 10.3389/fnbeh.2019.00233] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 09/17/2019] [Indexed: 01/02/2023] Open
Abstract
The CA2 region of the hippocampus is a somewhat obscure area lacking in an understanding of its form and function. Until recently, the CA2 has been thought of as merely an extension of the CA3, with some referring to it as the CA3a region. Recent investigations into this area have not only delineated the CA2, but also defined it as a region distinct from both CA1 and CA3, with a unique set of cortical inputs and outputs and contributions to cognitive processes. One such process that has been shown to depend on the CA2 is the ability to recognize a novel or familiar conspecific, known as social recognition memory. Here, we review these findings and discuss the parallels between CA2 dysfunction and social impairments.
Collapse
Affiliation(s)
- Nikolaos Tzakis
- Department of Neuroscience, Carleton University, Ottawa, ON, Canada
| | | |
Collapse
|
16
|
Khatami L, Khodagholi F, Motamedi F. Reversible inactivation of interpeduncular nucleus impairs memory consolidation and retrieval but not learning in rats: A behavioral and molecular study. Behav Brain Res 2018; 342:79-88. [PMID: 29355671 DOI: 10.1016/j.bbr.2018.01.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 01/11/2018] [Accepted: 01/11/2018] [Indexed: 12/15/2022]
Abstract
The Interpedundular nucleus (IPN) is a small midbrain structure located deeply between the two cerebral peduncles. The strategic placement of this nucleus makes it a possible relay between structures involved in the modulation of hippocampal theta rhythm activity. In this study we aimed to investigate how reversible inactivation of IPN could affect the acquisition, consolidation and retrieval phases of memory in passive avoidance (PA) and Morris water maze (MWM) tasks. To support our data, molecular studies were performed in order to detect possible changes in the expression of proteins related to learning and memory in the hippocampus. To address this issue rats' IPN was reversibly inactivated by microinjection of lidocaine hydrochloride (4%). After the behavioral studies, the phosphorylation of CREB and P70, and c-fos expression levels in the hippocampus were determined using western blotting and immunohistochemistry respectively. Our results in the PA and MWM tasks showed that IPN reversible inactivation could impair immediate post training consolidation and retrieval while it had no effect on the acquisition phase. In addition, there was a deficit in the retention of the MWM working memory. Our data showed the ratio of pCREB/CREB, pP70/P70 and c-fos expression in the hippocampus significantly decreased after IPN reversible inactivation. Collectively, the results show that behaviorally defined changes could be due to what happens molecularly in the hippocampus after IPN reversible inactivation. It is concluded that IPN not only makes part of a network involved in the modulation of hippocampal theta rhythm activity, but also is actively engaged in hippocampal memory formation.
Collapse
Affiliation(s)
- Leila Khatami
- School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM), P.O. Box 1954851167, Tehran, Iran.
| | - Fariba Khodagholi
- Neurobiology Research Center, Shahid Beheshti University of Medical Sciences, P.O. Box 19615-1178, Tehran, Iran.
| | - Fereshteh Motamedi
- School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM), P.O. Box 1954851167, Tehran, Iran; Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, P.O. Box 19615-1178, Tehran, Iran.
| |
Collapse
|
17
|
Pedersen NP, Ferrari L, Venner A, Wang JL, Abbott SBG, Vujovic N, Arrigoni E, Saper CB, Fuller PM. Supramammillary glutamate neurons are a key node of the arousal system. Nat Commun 2017; 8:1405. [PMID: 29123082 PMCID: PMC5680228 DOI: 10.1038/s41467-017-01004-6] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 08/10/2017] [Indexed: 12/27/2022] Open
Abstract
Basic and clinical observations suggest that the caudal hypothalamus comprises a key node of the ascending arousal system, but the cell types underlying this are not fully understood. Here we report that glutamate-releasing neurons of the supramammillary region (SuMvglut2) produce sustained behavioral and EEG arousal when chemogenetically activated. This effect is nearly abolished following selective genetic disruption of glutamate release from SuMvglut2 neurons. Inhibition of SuMvglut2 neurons decreases and fragments wake, also suppressing theta and gamma frequency EEG activity. SuMvglut2 neurons include a subpopulation containing both glutamate and GABA (SuMvgat/vglut2) and another also expressing nitric oxide synthase (SuMNos1/Vglut2). Activation of SuMvgat/vglut2 neurons produces minimal wake and optogenetic stimulation of SuMvgat/vglut2 terminals elicits monosynaptic release of both glutamate and GABA onto dentate granule cells. Activation of SuMNos1/Vglut2 neurons potently drives wakefulness, whereas inhibition reduces REM sleep theta activity. These results identify SuMvglut2 neurons as a key node of the wake−sleep regulatory system. Supramammillary nucleus (SuM) neurons have been studied in the context of REM sleep but their possible role in mediating wakefulness is not known. Here the authors elucidate the distinct functional contributions of three subpopulations in the SuM on electrographical and behavioral arousal in mice using genetically targeted approaches.
Collapse
Affiliation(s)
- Nigel P Pedersen
- Department of Neurology and Epilepsy Service, Emory University, Atlanta, GA, 30322, USA.
| | - Loris Ferrari
- Department of Neurology, Beth Israel Deaconess Medical Center, Bostan, MA, 02215, USA.,Division of Sleep Medicine, Harvard Medical School, Bostan, MA, 02215, USA
| | - Anne Venner
- Department of Neurology, Beth Israel Deaconess Medical Center, Bostan, MA, 02215, USA.,Division of Sleep Medicine, Harvard Medical School, Bostan, MA, 02215, USA
| | - Joshua L Wang
- Department of Neurology, Beth Israel Deaconess Medical Center, Bostan, MA, 02215, USA
| | - Stephen B G Abbott
- Department of Neurology, Beth Israel Deaconess Medical Center, Bostan, MA, 02215, USA
| | - Nina Vujovic
- Division of Sleep Medicine, Harvard Medical School, Bostan, MA, 02215, USA
| | - Elda Arrigoni
- Department of Neurology, Beth Israel Deaconess Medical Center, Bostan, MA, 02215, USA.,Division of Sleep Medicine, Harvard Medical School, Bostan, MA, 02215, USA
| | - Clifford B Saper
- Department of Neurology, Beth Israel Deaconess Medical Center, Bostan, MA, 02215, USA.,Division of Sleep Medicine, Harvard Medical School, Bostan, MA, 02215, USA
| | - Patrick M Fuller
- Department of Neurology, Beth Israel Deaconess Medical Center, Bostan, MA, 02215, USA. .,Division of Sleep Medicine, Harvard Medical School, Bostan, MA, 02215, USA.
| |
Collapse
|
18
|
Young CK, Ruan M, McNaughton N. A Critical Assessment of Directed Connectivity Estimates with Artificially Imposed Causality in the Supramammillary-Septo-Hippocampal Circuit. Front Syst Neurosci 2017; 11:72. [PMID: 29033799 PMCID: PMC5627232 DOI: 10.3389/fnsys.2017.00072] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 09/19/2017] [Indexed: 11/23/2022] Open
Abstract
Algorithms for estimating directed connectivity have become indispensable to further understand the neurodynamics between functionally coupled brain areas. The evaluation of directed connectivity on the propagation of brain activity has largely been based on simulated data or toy models, where various hidden properties of neurophysiological data may not be fully recapitulated. In this study, directionality was unequivocally manipulated in the freely moving rat in a unique dataset, where normal oscillatory interactions between the supramammillary nucleus (SuM) and hippocampus (HPC) were attenuated by temporary medial septal (MS) inactivation, and replaced by electrical stimulation of the fornix to evaluate the performance of several directed connectivity assessment methods. The directed transfer function, partial directed coherence, directed coherence, pair-wise Geweke-Granger causality, phase slope index, and phase transfer entropy, all found SuM to HPC theta propagation when the MS is inactivated, and HPC activity was driven by peaks of simultaneously recorded SuM theta. As expected from theoretical expectations and simulated data, signal features including coupling strength, signal-to-noise ratio, and stationarity all weakly affected directed connectivity measures. We conclude that all the examined directed connectivity estimates correctly identify artificially imposed uni-directionality of brain oscillations in freely moving animals. Non-auto-regressive modeling based methods appear to be the most robust, and are least affected by inherent features in data such as signal-to-noise ratio and stationarity.
Collapse
Affiliation(s)
- Calvin K Young
- Department of Psychology and Brain Health Research Centre, University of Otago, Dunedin, New Zealand
| | - Ming Ruan
- Department of Psychology and Brain Health Research Centre, University of Otago, Dunedin, New Zealand.,Wuhan Asia Heart Hospital, Wuhan, China
| | - Neil McNaughton
- Department of Psychology and Brain Health Research Centre, University of Otago, Dunedin, New Zealand
| |
Collapse
|
19
|
Requiring collaboration: Hippocampal-prefrontal networks needed in spatial working memory and ageing. A multivariate analysis approach. Neurobiol Learn Mem 2017; 140:33-42. [DOI: 10.1016/j.nlm.2017.02.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 02/12/2017] [Indexed: 11/21/2022]
|
20
|
Mohammadi M, Guan J, Khodagholi F, Yans A, Khalaj S, Gholami M, Taghizadeh GH, Aliaghaei A, Abdollahi M, Ghahremani MH, Sharifzadeh M. Reduction of autophagy markers mediated protective effects of JNK inhibitor and bucladesine on memory deficit induced by Aβ in rats. Naunyn Schmiedebergs Arch Pharmacol 2016; 389:501-10. [PMID: 26899864 DOI: 10.1007/s00210-016-1222-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 02/10/2016] [Indexed: 12/15/2022]
Abstract
Autophagy, the process of self-degradation of cellular components, has an important role in neurodegenerative diseases, such as Alzheimer's disease. In this study, we investigated the effects of SP600125 as c-Jun N-terminal kinase (JNK) inhibitor and bucladesine as a cyclic adenosine 3',5'-monophosphate (cAMP) analog on spatial memory and expression of autophagic factors in Aβ-injected rats. Male Wistar rats were used. Rats were randomly allocated into five groups as following: amyloid beta (Aβ)-only group, Aβ + SP600125 (30 μg/1 μ/side, n = 7) and/or bucladesine (100 μM/1 μl/side, n = 7), and the normal control (vehicle only) group. The treatments were administered bilaterally to the CA1 sub-region of the hippocampus stereotaxically. Spatial reference memory was performed using Morris Water Maze 21 days later. The expression of authophagy markers (beclin1, Atg7, Atg12, and LC3 II/LC3 I) in the hippocampus was evaluated using western blotting. Compared to the vehicle group, Aβ administration reduced spatial reference learning (P < 0.001) and memory (P < 0.01) and upregulated the expression of beclin1, Atg7, Atg12, and LC3 II/I (P < 0.0001). Compare to Aβ-only group, the administration of SP600125 and/or bucladesine improved spatial reference learning (P < 0.001) and memory (P < 0.01). Compared to the Aβ-only group, the treatment with SP600125 and/or bucladesine also reduced beclin1, Atg7, Atg12, and LC3 II/I (P < 0.0001) which was similar to amount of normal rats. In summary, it seems that the improvement of spatial memory by SP600125 and/or bucladesine in Aβ-injected rats is in relation with normalizing of autophagy to the physiologic level, possibly through neuroprotection and/or neuroplasticity.
Collapse
Affiliation(s)
- M Mohammadi
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, Iran
| | - J Guan
- Liggins Institute, University of Auckland, 85 Park Road, Grafton, Auckland, New Zealand.,Centre for Brain Research, Faculty of Medicine and Health Sciences, University of Auckland, 85 Park Road, Grafton, Auckland, New Zealand.,Gravida National Centre for Growth and Development, University of Auckland, Auckland, New Zealand
| | - F Khodagholi
- Neuroscience Research Centre, ShahidBeheshti University of Medical Sciences, Tehran, Iran.,Neurobiology Research Centre, ShahidBeheshti University of Medical Sciences, Tehran, Iran
| | - A Yans
- Neuroscience Research Centre, ShahidBeheshti University of Medical Sciences, Tehran, Iran.,Neurobiology Research Centre, ShahidBeheshti University of Medical Sciences, Tehran, Iran
| | - S Khalaj
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, Iran
| | - M Gholami
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, Iran
| | - G H Taghizadeh
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, Iran.,Department of Neuroscience, Faculty of Advanced Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - A Aliaghaei
- Department of Anatomy and Cell Biology, School of Medicine, ShahidBeheshti University of Medical Sciences, Tehran, Iran
| | - M Abdollahi
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, Iran
| | - M H Ghahremani
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, Iran
| | - M Sharifzadeh
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, Iran. .,Department of Neuroscience, Faculty of Advanced Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
| |
Collapse
|
21
|
Hernández-Pérez JJ, Gutiérrez-Guzmán BE, López-Vázquez MÁ, Olvera-Cortés ME. Supramammillary serotonin reduction alters place learning and concomitant hippocampal, septal, and supramammillar theta activity in a Morris water maze. Front Pharmacol 2015; 6:250. [PMID: 26578960 PMCID: PMC4625187 DOI: 10.3389/fphar.2015.00250] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 10/14/2015] [Indexed: 11/29/2022] Open
Abstract
Hippocampal theta activity is related to spatial information processing, and high-frequency theta activity, in particular, has been linked to efficient spatial memory performance. Theta activity is regulated by the synchronizing ascending system (SAS), which includes mesencephalic and diencephalic relays. The supramamillary nucleus (SUMn) is located between the reticularis pontis oralis and the medial septum (MS), in close relation with the posterior hypothalamic nucleus (PHn), all of which are part of this ascending system. It has been proposed that the SUMn plays a role in the modulation of hippocampal theta-frequency; this could occur through direct connections between the SUMn and the hippocampus or through the influence of the SUMn on the MS. Serotonergic raphe neurons prominently innervate the hippocampus and several components of the SAS, including the SUMn. Serotonin desynchronizes hippocampal theta activity, and it has been proposed that serotonin may regulate learning through the modulation of hippocampal synchrony. In agreement with this hypothesis, serotonin depletion in the SUMn/PHn results in deficient spatial learning and alterations in CA1 theta activity-related learning in a Morris water maze. Because it has been reported that SUMn inactivation with lidocaine impairs the consolidation of reference memory, we asked whether changes in hippocampal theta activity related to learning would occur through serotonin depletion in the SUMn, together with deficiencies in memory. We infused 5,7-DHT bilaterally into the SUMn in rats and evaluated place learning in the standard Morris water maze task. Hippocampal (CA1 and dentate gyrus), septal and SUMn EEG were recorded during training of the test. The EEG power in each region and the coherence between the different regions were evaluated. Serotonin depletion in the SUMn induced deficient spatial learning and altered the expression of hippocampal high-frequency theta activity. These results provide evidence in support of a role for serotonin as a modulator of hippocampal learning, acting through changes in the synchronicity evoked in several relays of the SAS.
Collapse
Affiliation(s)
- J. Jesús Hernández-Pérez
- Laboratorio de Neurofisiología Experimental, División de Neurociencias, Centro de Investigación Biomédica de Michoacán, Instituto Mexicano del Seguro SocialMorelia, México
| | - Blanca E. Gutiérrez-Guzmán
- Laboratorio de Neurofisiología Experimental, División de Neurociencias, Centro de Investigación Biomédica de Michoacán, Instituto Mexicano del Seguro SocialMorelia, México
| | - Miguel Á. López-Vázquez
- Laboratorio de Neuroplasticidad de los Procesos Cognitivos, División de Neurociencias, Centro de Investigación Biomédica de Michoacán, Instituto Mexicano del Seguro SocialMorelia, México
- Instituto de Física y Matemáticas, Universidad Michoacana de San Nicolás de HidalgoMorelia, México
| | - María E. Olvera-Cortés
- Laboratorio de Neurofisiología Experimental, División de Neurociencias, Centro de Investigación Biomédica de Michoacán, Instituto Mexicano del Seguro SocialMorelia, México
- *Correspondence: María E. Olvera-Cortés
| |
Collapse
|
22
|
Vertes RP. Major diencephalic inputs to the hippocampus: supramammillary nucleus and nucleus reuniens. Circuitry and function. PROGRESS IN BRAIN RESEARCH 2015; 219:121-44. [PMID: 26072237 DOI: 10.1016/bs.pbr.2015.03.008] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The hippocampus receives two major external inputs from the diencephalon, that is, from the supramammillary nucleus (SUM) and nucleus reuniens (RE) of the midline thalamus. These two afferents systems project to separate, nonoverlapping, regions of the hippocampus. Specifically, the SUM distributes to the dentate gyrus (DG) and to CA2 of the dorsal and ventral hippocampus, whereas RE projects to CA1 of the dorsal and ventral hippocampus and to the subiculum. SUM and RE fibers to the hippocampus participate in common as well as in separate functions. Both systems would appear to amplify signals from other sources to their respective hippocampal targets. SUM amplifies signals from the entorhinal cortex (EC) to DG, whereas RE may amplify them from CA3 (and EC) to CA1 of the hippocampus. This "amplification" may serve to promote the transfer, encoding, and possibly storage of information from EC to DG and from CA3 and EC to CA1. Regarding their unique actions on the hippocampus, the SUM is a vital part of an ascending brainstem to hippocampal system generating the theta rhythm of the hippocampus, whereas RE importantly routes information from the medial prefrontal cortex to the hippocampus to thereby mediate functions involving both structures. In summary, although, to date, SUM and RE afferents to the hippocampus have not been extensively explored, the SUM and RE exert a profound influence on the hippocampus in processes of learning and memory.
Collapse
Affiliation(s)
- Robert P Vertes
- Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton, FL, USA.
| |
Collapse
|
23
|
Olvera-Cortés ME, Gutiérrez-Guzmán BE, López-Loeza E, Hernández-Pérez JJ, López-Vázquez MÁ. Serotonergic modulation of hippocampal theta activity in relation to hippocampal information processing. Exp Brain Res 2013; 230:407-26. [DOI: 10.1007/s00221-013-3679-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Accepted: 08/07/2013] [Indexed: 10/26/2022]
|
24
|
Similarities and differences between the brain networks underlying allocentric and egocentric spatial learning in rat revealed by cytochrome oxidase histochemistry. Neuroscience 2012; 223:174-82. [DOI: 10.1016/j.neuroscience.2012.07.066] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Revised: 07/27/2012] [Accepted: 07/30/2012] [Indexed: 11/18/2022]
|
25
|
Caruana DA, Alexander GM, Dudek SM. New insights into the regulation of synaptic plasticity from an unexpected place: hippocampal area CA2. Learn Mem 2012; 19:391-400. [PMID: 22904370 DOI: 10.1101/lm.025304.111] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The search for molecules that restrict synaptic plasticity in the brain has focused primarily on sensory systems during early postnatal development, as critical periods for inducing plasticity in sensory regions are easily defined. The recent discovery that Schaffer collateral inputs to hippocampal area CA2 do not readily support canonical activity-dependent long-term potentiation (LTP) serves as a reminder that the capacity for synaptic modification is also regulated anatomically across different brain regions. Hippocampal CA2 shares features with other similarly "LTP-resistant" brain areas in that many of the genes linked to synaptic function and the associated proteins known to restrict synaptic plasticity are expressed there. Add to this a rich complement of receptors and signaling molecules permissive for induction of atypical forms of synaptic potentiation, and area CA2 becomes an ideal model system for studying specific modulators of brain plasticity. Additionally, recent evidence suggests that hippocampal CA2 is instrumental for certain forms of learning, memory, and social behavior, but the links between CA2-enriched molecules and putative CA2-dependent behaviors are only just beginning to be made. In this review, we offer a detailed look at what is currently known about the synaptic plasticity in this important, yet largely overlooked component of the hippocampus and consider how the study of CA2 may provide clues to understanding the molecular signals critical to the modulation of synaptic function in different brain regions and across different stages of development.
Collapse
Affiliation(s)
- Douglas A Caruana
- Laboratory of Neurobiology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709, USA
| | | | | |
Collapse
|
26
|
Attenuating the effect of Ghrelin on memory storage via bilateral reversible inactivation of the basolateral amygdale. Behav Brain Res 2012; 232:391-4. [DOI: 10.1016/j.bbr.2012.03.035] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Revised: 03/18/2012] [Accepted: 03/22/2012] [Indexed: 11/23/2022]
|
27
|
Gutiérrez-Guzmán BE, Hernández-Pérez JJ, López-Vázquez MÁ, Fregozo CS, Guevara MÁ, Olvera-Cortés ME. Serotonin depletion of supramammillary/posterior hypothalamus nuclei produces place learning deficiencies and alters the concomitant hippocampal theta activity in rats. Eur J Pharmacol 2012; 682:99-109. [PMID: 22387092 DOI: 10.1016/j.ejphar.2012.02.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 02/10/2012] [Accepted: 02/15/2012] [Indexed: 11/25/2022]
Abstract
Hippocampal theta activity is important for the acquisition of spatial information and is strongly influenced and regulated by extra-hippocampal inputs from the synchronising ascending system (SAS), which includes the supramammillary nucleus (SUMn) and the posterior hypothalamic nucleus (PHn). Together these nuclei play an important role in controlling the frequency encoding of theta activity and are innervated by serotonin synapses, which also regulate theta activity and learning abilities. The participation of the SUMn in place learning and modulation of hippocampal theta activity were recently shown; thus, we questioned whether serotonin acting on SUMn/PHn could modulate place learning ability and concurrent hippocampal theta activity. The serotonergic terminals of the SUMn/PHn in rats were lesioned through 5,7-dihydroxytryptamine (5,7-DHT) infusion, and hippocampal theta activity during the Morris water maze test was recorded. Rats in the vehicle group learned the task efficiently and showed learning-related theta changes in the CA1 and dentate gyrus regions throughout the training. The 5-HT-depleted rats were deficient in the Morris water maze task and showed theta activity in the CA1 and dentate gyrus that were unrelated to the processing of learning. We conclude that serotonin can regulate the hippocampal theta activity acting on the SUMn/PHn relay of the SAS and that the influence of 5-HT in these nuclei is required for the learning-related changes in hippocampal theta activity that underlie the successful resolution of the Morris water maze task.
Collapse
Affiliation(s)
- Blanca Erika Gutiérrez-Guzmán
- Laboratorio de Neurofisiología Experimental, Centro de Investigación Biomédica de Michoacán, Instituto Mexicano del Seguro Social, Camino de la Arboleda # 300, Ex-hacienda de San José de la Huerta, C.P. 58341, Morelia, Mich., México.
| | | | | | | | | | | |
Collapse
|
28
|
Choi WK, Wirtshafter D, Park HJ, Lee MS, Her S, Shim I. The characteristics of supramammillary cells projecting to the hippocampus in stress response in the rat. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2012; 16:17-24. [PMID: 22416215 PMCID: PMC3298821 DOI: 10.4196/kjpp.2012.16.1.17] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 12/20/2011] [Accepted: 12/25/2011] [Indexed: 01/03/2023]
Abstract
The hypothalamus-pituitary-adrenocortex (HPA) axis is the central mediator of the stress response. The supramammillary (SuM) region is relatively unique among the hypothalamic structures in that it sends a large, direct projection to the hippocampal formation. It has been shown that mild stress could activate the SuM cells that project to the hippocampus. However, the role of these cell populations in modulating the stress response is not known. The present study examined the effect of stress on different populations of SuM cells that project to the hippocampus by injecting the fluorescent retrograde tracer, fluorogold (FG), into the hippocampus and utilizing the immunohistochemistry of choline acetyltransferase (ChAT), corticotrophin releasing factor (CRF), serotonin (5-HT), glutamate decarboxylase (GAD), tyrosine hydroxylase (TH) and NADPH-d reactivity. Immobilization (IMO) stress (2 hr) produced an increase in the expression of ChAT-immunoreactivity, and tended to increase in CRF, 5-HT, GAD, TH-immunoreactivity and nitric oxide (NO)-reactivity in the SuM cells. Fifty-three percent of 5-HT, 31% of ChAT and 56% of CRF cells were double stained with retrograde cells from the hippocampus. By contrast, a few retrogradely labeled cells projecting to the hippocampus were immunoreactive for dopamine, γ-aminobutyric acid (GABA) and NO. These results suggest that the SuM region contains distinct cell populations that differentially respond to stress. In addition, the findings suggest that serotonergic, cholinergic and corticotropin releasing cells projecting to the hippocampus within the SuM nucleus may play an important role in modulating stress-related behaviors.
Collapse
Affiliation(s)
- Woong Ki Choi
- Acupuncture & Meridian Science Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
| | - David Wirtshafter
- Department of Psychology, The University of Illinois at Chicago, Chicago, IL 60607-7137, USA
| | - Hyun-Jung Park
- Acupuncture & Meridian Science Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
- Department of Integrative Medicine and Research Center of Behavioral Medicine, College of Medicine, The Catholic University of Korea, Seoul 137-701, Korea
| | - Mi-Sook Lee
- Acupuncture & Meridian Science Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
- Division of Bio-Imaging, Chuncheon Center, Korea Basic Science Institute, Chuncheon 200-701, Korea
| | - Song Her
- Division of Bio-Imaging, Chuncheon Center, Korea Basic Science Institute, Chuncheon 200-701, Korea
| | - Insop Shim
- Acupuncture & Meridian Science Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
| |
Collapse
|
29
|
Inhibition of JNK phosphorylation reverses memory deficit induced by β-amyloid (1–42) associated with decrease of apoptotic factors. Behav Brain Res 2011; 217:424-31. [DOI: 10.1016/j.bbr.2010.11.017] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Revised: 10/25/2010] [Accepted: 11/05/2010] [Indexed: 01/11/2023]
|
30
|
Ruan M, Young CK, McNaughton N. Minimal driving of hippocampal theta by the supramammillary nucleus during water maze learning. Hippocampus 2010; 21:1074-81. [PMID: 20865741 DOI: 10.1002/hipo.20821] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/30/2010] [Indexed: 11/05/2022]
Abstract
Previous studies have shown only modest effects of supramammillary nucleus (SuM) dysfunction on theta frequency and learning in the water maze (WM), with larger effects in other tasks. However, theta recorded from SuM, and used to trigger the production of theta-like oscillations in the hippocampus, produced reversal of the deficit in WM learning produced by theta blocking. We explored this apparent inconsistency by analyzing the relationship between SuM and hippocampal theta in the control group of this theta-blocking experiment using coherence, phase analysis, and the directed transfer function. We found little evidence of an influence of SuM on the hippocampus in the bulk of WM learning-with some possibility of SuM becoming involved briefly later in learning. A learning-related increase in coherence was observed in conjunction with gradual phase reorganization of hippocampal theta in relation to SuM theta. This change in phase dynamics between the two structures was also correlated with a relative increase of the estimated direction of theta propagation from the SuM to the hippocampus. These results are consistent with the previous weak effects of SuM lesions and suggest that the use of SuM as a source to trigger hippocampal theta and recover function is likely to be due to coherence between SuM and some other structure that normally controls hippocampal theta during WM learning.
Collapse
Affiliation(s)
- Ming Ruan
- Department of Psychology and the Neuroscience Research Centre, University of Otago, Dunedin, New Zealand
| | | | | |
Collapse
|
31
|
Ito M, Shirao T, Doya K, Sekino Y. Three-dimensional distribution of Fos-positive neurons in the supramammillary nucleus of the rat exposed to novel environment. Neurosci Res 2009; 64:397-402. [DOI: 10.1016/j.neures.2009.04.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2009] [Revised: 04/16/2009] [Accepted: 04/17/2009] [Indexed: 11/28/2022]
|
32
|
Miller SM, Lonstein JS. Dopaminergic projections to the medial preoptic area of postpartum rats. Neuroscience 2009; 159:1384-96. [PMID: 19409227 DOI: 10.1016/j.neuroscience.2009.01.060] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2008] [Revised: 01/19/2009] [Accepted: 01/27/2009] [Indexed: 11/19/2022]
Abstract
Dopamine receptor activity in the rodent medial preoptic area (mPOA) is crucial for the display of maternal behaviors, as well as numerous other physiological and behavioral functions. However, the origin of dopaminergic input to the mPOA has not been identified through neuroanatomical tracing. To accomplish this, the retrograde tracer Fluorogold was iontophoretically applied to the mPOA of postpartum laboratory rats, and dual-label immunocytochemistry for Fluorogold and tyrosine hydroxylase later performed to identify dopaminergic cells of the forebrain and midbrain projecting to the mPOA. Results indicate that the number of dopaminergic cells projecting to the mPOA is moderate ( approximately 90 cells to one hemisphere), and that these cells have an unexpectedly wide distribution. Even so, more than half of the dual-labeled cells were found in either what has been considered extensions of the A10 dopamine group (particularly the ventrocaudal posterior hypothalamus and adjacent medial supramammillary nucleus), or in the A10 group of the ventral tegmental area. The rostral hypothalamus and surrounding region also contained numerous dual-labeled cells, with the greatest number found within the mPOA itself (including in the anteroventral preoptic area and preoptic periventricular nucleus). Notably, dual-labeled cells were rare in the zona incerta (A13), a site previously suggested to provide dopaminergic input to the mPOA. This study is the first to use anatomical tracing to detail the dopaminergic projections to the mPOA in the laboratory rat, and indicates that much of this projection originates more caudally than previously suggested.
Collapse
Affiliation(s)
- S M Miller
- Department of Psychology, Michigan State University, East Lansing, MI 48824, USA
| | | |
Collapse
|
33
|
Khakpour-Taleghani B, Lashgari R, Motamedi F, Naghdi N. Effect of reversible inactivation of locus ceruleus on spatial reference and working memory. Neuroscience 2009; 158:1284-91. [DOI: 10.1016/j.neuroscience.2008.11.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2008] [Revised: 10/06/2008] [Accepted: 11/03/2008] [Indexed: 11/17/2022]
|
34
|
Salehi A, Wu C, Zhan K, Mobley WC. Axonal Transport of Neurotrophic Signals: An Achilles' Heel for Neurodegeneration? INTRACELLULAR TRAFFIC AND NEURODEGENERATIVE DISORDERS 2009. [DOI: 10.1007/978-3-540-87941-1_7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
35
|
Davoodi FG, Motamedi F, Naghdi N, Akbari E. Effect of reversible inactivation of the reuniens nucleus on spatial learning and memory in rats using Morris water maze task. Behav Brain Res 2008; 198:130-5. [PMID: 19038291 DOI: 10.1016/j.bbr.2008.10.037] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2008] [Revised: 10/15/2008] [Accepted: 10/20/2008] [Indexed: 11/24/2022]
Abstract
The involvement of thalamic midline nuclei (MLN) in early stage of Alzheimer's disease and in diencephalic amnesia has drawn attention to the connectivity between the nucleus reuniens (RE) and structures of medial temporal lobe. RE is major source of thalamic afferents to the hippocampus and has been shown to exert powerful excitatory action on CA1 of hippocampus, which is supposed to be involved in learning and memory processes. However, the role of the RE on spatial memory is a controversial issue. The present study was designed to evaluate the role of the RE in acquisition, consolidation and retrieval of spatial reference memory (RM) and working memory (WM). We assessed the effect of reversible inactivation of RE with tetracaine (0.5 microl, 2%) on different stages of memory. Rats were trained on RM and WM versions of the Morris water maze (MWM) task. RE was inactivated before or immediately after training or before the probe trial of retrieval tests. The data showed that reversible inactivation of the RE significantly impaired both RM and WM versions of MWM. Therefore, it seems that nucleus reuniens of thalamus plays a role in spatial RM and WM version of the MWM task in rats.
Collapse
Affiliation(s)
- Farzaneh Ghiafeh Davoodi
- Neuroscience Research Center and Department of Physiology, Faculty of medicine, Shahid Beheshti University (Medical Sciences), Tehran, Iran
| | | | | | | |
Collapse
|
36
|
Aranda L, Begega A, Sánchez-López J, Aguirre JA, Arias JL, Santín LJ. Temporary inactivation of the supramammillary area impairs spatial working memory and spatial reference memory retrieval. Physiol Behav 2008; 94:322-30. [DOI: 10.1016/j.physbeh.2008.01.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2007] [Revised: 01/17/2008] [Accepted: 01/23/2008] [Indexed: 10/22/2022]
|
37
|
Shahidi S, Komaki A, Mahmoodi M, Lashgari R. The role of GABAergic transmission in the dentate gyrus on acquisition, consolidation and retrieval of an inhibitory avoidance learning and memory task in the rat. Brain Res 2008; 1204:87-93. [DOI: 10.1016/j.brainres.2008.02.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2007] [Revised: 01/30/2008] [Accepted: 02/03/2008] [Indexed: 11/15/2022]
|
38
|
Cumbers MR, Chung ST, Wakerley JB. A neuromodulatory role for oxytocin within the supramammillary nucleus. Neuropeptides 2007; 41:217-26. [PMID: 17568668 DOI: 10.1016/j.npep.2007.04.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2006] [Revised: 03/05/2007] [Accepted: 04/10/2007] [Indexed: 10/23/2022]
Abstract
Oxytocin functions as both a neurohypophysial hormone and central neuromodulatory peptide, and has been implicated in reproductive behaviours, anxiety and reward, as well as facilitation of the neuroendocrine milk-ejection reflex. A potential substrate for oxytocin is the supramammillary nucleus (SuM), a structure that contains oxytocin binding sites and serves as an important relay within the limbic system. Hence, this study investigated the neuromodulatory role of oxytocin within the SuM. Firstly, the effect of oxytocin on neuronal firing within the SuM was studied, using in vitro brain slices from virgin female rats. Oxytocin (10(-6)M) excited approximately 50% of SuM neurones, and similar results were obtained with the selective oxytocin agonist, Thr(4) Gly(7) oxytocin (TGOT) (10(-6) and 10(-7)M). The remaining neurones were unaffected. The TGOT response was blocked by application of the oxytocin antagonist, [d(CH(2))51,Tyr(Me)(2),Thr(4),Orn(8),Tyr-NH29]-vasotocin. Repeat doses of TGOT caused diminution of the response, indicative of desensitisation. In the second series of experiments, immunocytochemical techniques were used to study the oxytocinergic innervation of the SuM. The supramammillary decussation was found to contain numerous oxytocinergic fibres, and some could be seen coursing ventrally to enter the SuM. Whereas, some were clearly "en passant" fibres innervating the neurohypophysis, others followed a more convoluted and branching course, and appeared to terminate within the nucleus. Finally, in vivo microinfusion studies investigated whether oxytocin injected into the SuM facilitated the milk-ejection reflex, a well known action of central oxytocin. Oxytocin microinfusion in the region of the SuM caused a pronounced facilitation of the reflex, contrasting with the much smaller effects of microinfusions made rostral or caudal to the nucleus. Collectively, these results strongly support a neuromodulatory role for oxytocin within the SuM. This could have important implications for understanding the diverse neuroendocrine and behavioural functions of central oxytocin, including its role in reward.
Collapse
Affiliation(s)
- M R Cumbers
- Department of Anatomy, University of Bristol, School of Medical Sciences, University Walk, Bristol BS8 1TD, UK
| | | | | |
Collapse
|
39
|
Akbari E, Naghdi N, Motamedi F. The selective orexin 1 receptor antagonist SB-334867-A impairs acquisition and consolidation but not retrieval of spatial memory in Morris water maze. Peptides 2007; 28:650-6. [PMID: 17161886 DOI: 10.1016/j.peptides.2006.11.002] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2006] [Revised: 11/08/2006] [Accepted: 11/09/2006] [Indexed: 11/28/2022]
Abstract
The novel neuropeptides orexin-A and orexin-B derive from a common 130-amino acid precursor molecule (prepro-orexin), are mainly localized to neurons within and around the lateral hypothalamus, and exhibit high affinity to the closely related G-Protein-coupled receptors orexin 1 and 2 receptor (OX1R, OX2R). Orexinergic neurons send their axons to the hippocampal formation (CA1, CA2 and dentate gyrus), which expresses OX1Rs. Recent studies have shown that central administration of orexin-A and orexin-B have effects on learning and memory but literature concerning the role of orexinergic system in cognition remains controversial. More recently, antagonists have been described. The most potent and selective is SB-334867-A, which has an affinity of 40 nM at OX1R which is at least 50-fold selective over OX2R. It is likely that the intracerebroventricular (i.c.v.) administration may block OX1Rs in many brain regions. Previously we have shown that intra-CA1 injection of SB-334867-A impairs acquisition, consolidation and retrieval of spatial memory in MWM task. In the present study, the effect of pre-training, post-training and pre-probe of trial intra-DG (dentate gyrus) administration of SB-334867-A (1.5, 3, 6 microg/0.5 microl) on acquisition, consolidation and retrieval in a single-day testing version of MWM (Morris water maze) task was examined. Our results show impaired acquisition and consolidation of MWM task for SB-334867-A as compared with the control group. However, SB-334867-A had no effect on retrieval in spatial memory. Also, this antagonist had no effect on escape latency of a non-spatial visual discrimination task. Therefore, it seems that endogenous orexin-A and orexin-B, through DG OX1Rs, play an important role in spatial learning and memory in the rat.
Collapse
Affiliation(s)
- Esmaeil Akbari
- Department of Physiology and Neuroscience Research Center, School of Medicine, Shaheed Beheshti University of Medical Sciences, Tehran, Iran
| | | | | |
Collapse
|
40
|
Elvander-Tottie E, Eriksson TM, Sandin J, Ogren SO. N-methyl-d-aspartate receptors in the medial septal area have a role in spatial and emotional learning in the rat. Neuroscience 2006; 142:963-78. [PMID: 16952425 DOI: 10.1016/j.neuroscience.2006.07.043] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2006] [Revised: 07/02/2006] [Accepted: 07/17/2006] [Indexed: 10/24/2022]
Abstract
Cholinergic and GABAergic neurons in the medial septal/vertical limb of the diagonal band of Broca (MS/vDB) area project to the hippocampus and constitute the septohippocampal pathway, which has been implicated in learning and memory. There is also evidence for extrinsic and intrinsic glutamatergic neurons in the MS/vDB, which by regulating septohippocampal neurons can influence hippocampal functions. The potential role of glutamatergic N-methyl-D-aspartate (NMDA) receptors within the MS/vDB for spatial and emotional learning was studied using the water maze and step-through passive avoidance (PA) tasks, which are both hippocampal-dependent. Blockade of septal NMDA receptors by infusion of the competitive NMDA receptor antagonist D-(-)-2-amino-5-phosphonopentanoic acid (D-AP5) (0.3-5 microg/rat), infused 15 min prior to training, impaired spatial learning and memory at the 5 microg dose of D-AP5, while doses of 0.3 and 1 microg per rat had no effect. The impairment in spatial learning appears not to be caused by sensorimotor or motivational disturbances, or anxiogenic-like behavior. Thus, d-AP5-treated rats were not impaired in swim performance or visuospatial abilities and spent more time in the open arms of the elevated plus-maze. In the PA task, intraseptal D-AP5 infused 15 min before training impaired retention as examined 24 h after training. This impairment was observed already at the 0.3 microg dose, suggesting that NMDA receptors within the MS/vDB may be more important for emotional than spatial memory. In summary, the present data indicate that changes in septal glutamate transmission and NMDA receptor activity can influence activity-dependent synaptic plasticity in the hippocampus and thereby learning and memory.
Collapse
Affiliation(s)
- E Elvander-Tottie
- Department of Neuroscience, Division of Behavioral Neuroscience, Karolinska Institutet, Retzius väg 8, S-171 77 Stockholm, Sweden.
| | | | | | | |
Collapse
|
41
|
Dombrowski PA, Andreatini R. Reversible inactivation of the dorsal raphe nucleus blocked the antipanic-like effect of chronic imipramine in the elevated T-maze. Neurosci Lett 2006; 407:80-5. [PMID: 16959426 DOI: 10.1016/j.neulet.2006.08.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2006] [Revised: 07/07/2006] [Accepted: 08/03/2006] [Indexed: 11/17/2022]
Abstract
Antidepressant drugs are effective in the treatment of panic in human panic disorder patients. One hypothesis is that the anti-panic effects of antidepressant drugs are mediated by an increase in the activity of serotonergic neurons within dorsal raphe nucleus (DRN) leading to an increase in serotonin-mediated inhibition of the dorsal periaqueductal gray (DPAG). In order to test this hypothesis, we investigated the effects of reversible inhibition of the DRN on behavior in the elevated T-maze (ETM) in control rats and rats chronically treated with imipramine. Rats were injected daily with imipramine (15 mg/kg i.p.) or saline for 24 days. A guide cannula was implanted in the DRN on day 14. Lidocaine (4%, 0.2 microL) or saline was injected into the DRN 10 min before the test in the ETM followed immediately by the open-field test (day 21). Three days later, the infusions were crossed-over, rats microinjected into the DRN with saline in the first trial received lidocaine and vice versa, and the behavioral tests were repeated (day 24). Chronic saline plus lidocaine in the DRN and chronic imipramine (plus saline or lidocaine in the DRN) impaired inhibitory avoidance, indicating an anxiolytic effect. In the one-way escape, lidocaine facilitated it, suggesting a panicogenic effect, while chronic imipramine impaired it, which is indicative of a panicolytic effect. Moreover, lidocaine blocked the facilitatory effect of chronic imipramine. The locomotor activity in the open field was not changed by any treatment compared to the control group. These effects were congruent with the hypothesis that the DRN has a dual effect on anxiety: increasing learned anxiety and decreasing innate anxiety. Moreover, they suggest that the DRN exerts a crucial role in the antipanic-like effect of chronic imipramine in the ETM.
Collapse
Affiliation(s)
- Patrícia Andréia Dombrowski
- Laboratório de Fisiologia e Farmacologia do Sistema Nervoso Central, Departamento de Farmacologia, Setor de Ciências Biológicas, Universidade Federal do Paraná, Centro Politécnico, P.O. Box 19031, 81531-990, Curitiba, PR, Brazil
| | | |
Collapse
|
42
|
Aranda L, Santín LJ, Begega A, Aguirre JA, Arias JL. Supramammillary and adjacent nuclei lesions impair spatial working memory and induce anxiolitic-like behavior. Behav Brain Res 2006; 167:156-64. [PMID: 16236369 DOI: 10.1016/j.bbr.2005.09.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2005] [Revised: 08/31/2005] [Accepted: 09/05/2005] [Indexed: 11/25/2022]
Abstract
The present study assesses the involvement of the supramammillary and adjacent nuclei in spatial memory and anxiety-like behaviors. Rats with electrolytic lesions in the supramammillary nucleus were pre- and post-operatively trained in two spatial memory tasks and two anxiety tasks. Spatial memory tasks were performed in an open field with seven different goal positions containing the reward. Anxiety-like behaviors were tested in the elevated T-maze. In the spatial reference memory task, neither lesioned nor sham-lesioned groups were impaired. In the working memory task, lesioned animals were permanently impaired in their ability to solve the delayed-matching-to-position task. This working memory deficit is not related to increased proactive interference. It could be related to impairment of the rats ability to reorganize spatial stimuli. Consequently, rats were not able to achieve an optimal performance level to solve spatial tasks with continuous changes in the place location. In the elevated T-maze, lesioned rats reduced passive avoidance response but no changes in the escape response were observed. These results suggest a clear involvement of the supramammillary nucleus in working memory and behavioral inhibition but not in either spatial reference memory or in escape responses.
Collapse
Affiliation(s)
- Lourdes Aranda
- Dpto. Psicobiología y Metodología de las CC, Facultad de Psicología, Universidad de Málaga, Campus de Teatinos s/n, 29071 Málaga, Spain
| | | | | | | | | |
Collapse
|