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Ding SS, Fox JL, Gordus A, Joshi A, Liao JC, Scholz M. Fantastic beasts and how to study them: rethinking experimental animal behavior. J Exp Biol 2024; 227:jeb247003. [PMID: 38372042 PMCID: PMC10911175 DOI: 10.1242/jeb.247003] [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] [Indexed: 02/20/2024]
Abstract
Humans have been trying to understand animal behavior at least since recorded history. Recent rapid development of new technologies has allowed us to make significant progress in understanding the physiological and molecular mechanisms underlying behavior, a key goal of neuroethology. However, there is a tradeoff when studying animal behavior and its underlying biological mechanisms: common behavior protocols in the laboratory are designed to be replicable and controlled, but they often fail to encompass the variability and breadth of natural behavior. This Commentary proposes a framework of 10 key questions that aim to guide researchers in incorporating a rich natural context into their experimental design or in choosing a new animal study system. The 10 questions cover overarching experimental considerations that can provide a template for interspecies comparisons, enable us to develop studies in new model organisms and unlock new experiments in our quest to understand behavior.
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Affiliation(s)
- Siyu Serena Ding
- Max Planck Institute of Animal Behavior, 78464 Konstanz, Germany
- Centre for the Advanced Study of Collective Behaviour, University of Konstanz, 78464 Konstanz, Germany
| | - Jessica L. Fox
- Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Andrew Gordus
- Department of Biology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Abhilasha Joshi
- Departments of Physiology and Psychiatry, University of California, San Francisco, CA 94158, USA
| | - James C. Liao
- Department of Biology, The Whitney Laboratory for Marine Bioscience, University of Florida, St. Augustine, FL 32080, USA
| | - Monika Scholz
- Max Planck Research Group Neural Information Flow, Max Planck Institute for Neurobiology of Behavior – caesar, 53175 Bonn, Germany
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2
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Naveed M, Chao OY, Hill JW, Yang YM, Huston JP, Cao R. Circadian neurogenetics and its implications in neurophysiology, behavior, and chronomedicine. Neurosci Biobehav Rev 2024; 157:105523. [PMID: 38142983 PMCID: PMC10872425 DOI: 10.1016/j.neubiorev.2023.105523] [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: 09/05/2023] [Revised: 12/13/2023] [Accepted: 12/20/2023] [Indexed: 12/26/2023]
Abstract
The circadian rhythm affects multiple physiological processes, and disruption of the circadian system can be involved in a range of disease-related pathways. The genetic underpinnings of the circadian rhythm have been well-studied in model organisms. Significant progress has been made in understanding how clock genes affect the physiological functions of the nervous system. In addition, circadian timing is becoming a key factor in improving drug efficacy and reducing drug toxicity. The circadian biology of the target cell determines how the organ responds to the drug at a specific time of day, thus regulating pharmacodynamics. The current review brings together recent advances that have begun to unravel the molecular mechanisms of how the circadian clock affects neurophysiological and behavioral processes associated with human brain diseases. We start with a brief description of how the ubiquitous circadian rhythms are regulated at the genetic, cellular, and neural circuit levels, based on knowledge derived from extensive research on model organisms. We then summarize the latest findings from genetic studies of human brain disorders, focusing on the role of human clock gene variants in these diseases. Lastly, we discuss the impact of common dietary factors and medications on human circadian rhythms and advocate for a broader application of the concept of chronomedicine.
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Affiliation(s)
- Muhammad Naveed
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN 55812, USA; Department of Physiology and Pharmacology, College of Medicine and Life Sciences, The University of Toledo, Toledo, OH 43614, USA
| | - Owen Y Chao
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN 55812, USA
| | - Jennifer W Hill
- Department of Physiology and Pharmacology, College of Medicine and Life Sciences, The University of Toledo, Toledo, OH 43614, USA
| | - Yi-Mei Yang
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN 55812, USA; Department of Neuroscience, University of Minnesota Medical School, Minneapolis, MN 55455, USA
| | - Joseph P Huston
- Center for Behavioral Neuroscience, Institute of Experimental Psychology, Heinrich-Heine University, 40225 Düsseldorf, Germany
| | - Ruifeng Cao
- Department of Neuroscience and Cell Biology, Robert Wood Johnson Medical School, Rutgers University, Piscataway, NJ 08854, USA; Department of Neurology, Robert Wood Johnson Medical School, Rutgers University, Piscataway, NJ 08854, USA.
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3
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Fuchs F, Robin-Choteau L, Schneider A, Hugueny L, Ciocca D, Serchov T, Bourgin P. Delaying circadian sleep phase under ultradian light cycle causes time-of-day-dependent alteration of cognition and mood. Sci Rep 2023; 13:20313. [PMID: 37985784 PMCID: PMC10662432 DOI: 10.1038/s41598-023-44931-9] [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: 04/18/2023] [Accepted: 10/13/2023] [Indexed: 11/22/2023] Open
Abstract
Light exerts powerful and pervasive effects on physiology and behaviour. These effects can be indirect, through clock synchronization and phase adjustment of circadian rhythms, or direct, independent of the circadian process. Exposure to light at inappropriate times, as commonly experienced in today's society, leads to increased prevalence of circadian, sleep and mood disorders as well as cognitive impairments. In mice, exposure to an ultradian 3.5 h light/3.5 h dark cycle (T7) for several days has been shown to impair behaviour through direct, non-circadian, photic effects, a claim we challenge here. We first confirmed that T7 cycle induces a lengthening of the circadian period resulting in a day by day phase-delay of both activity and sleep rhythms. Spatial novelty preference test performed at different circadian time points in mice housed under T7 cycle demonstrated that cognitive deficit was restrained to the subjective night. Mice under the same condition also showed a modification of stress-induced despair-like behaviour in the forced swim test. Therefore, our data demonstrate that ultradian light cycles cause time-of-day-dependent alteration of cognition and mood through clock period lengthening delaying circadian sleep phase, and not through a direct photic influence. These results are of critical importance for the clinical applications of light therapy in the medical field and for today's society to establish lighting recommendations for shift work, schools, hospitals and homes.
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Affiliation(s)
- Fanny Fuchs
- Institute for Cellular and Integrative Neurosciences (INCI)-UPR 3212-CNRS/University of Strasbourg, 8 allée du Général Rouvillois, 67000, Strasbourg, France
- Sleep Disorders Center and CIRCSom (International Research Center for ChronoSomnology), Strasbourg University Hospital, 1 place de l'Hôpital, 67000, Strasbourg, France
| | - Ludivine Robin-Choteau
- Institute for Cellular and Integrative Neurosciences (INCI)-UPR 3212-CNRS/University of Strasbourg, 8 allée du Général Rouvillois, 67000, Strasbourg, France
- European Center for Diabetes Studies (CEED), Strasbourg, France
| | - Aline Schneider
- Institute for Cellular and Integrative Neurosciences (INCI)-UPR 3212-CNRS/University of Strasbourg, 8 allée du Général Rouvillois, 67000, Strasbourg, France
| | - Laurence Hugueny
- Institute for Cellular and Integrative Neurosciences (INCI)-UPR 3212-CNRS/University of Strasbourg, 8 allée du Général Rouvillois, 67000, Strasbourg, France
- Sleep Disorders Center and CIRCSom (International Research Center for ChronoSomnology), Strasbourg University Hospital, 1 place de l'Hôpital, 67000, Strasbourg, France
| | - Dominique Ciocca
- Chronobiotron-UMS3415-CNRS/University of Strasbourg, Strasbourg, France
| | - Tsvetan Serchov
- Institute for Cellular and Integrative Neurosciences (INCI)-UPR 3212-CNRS/University of Strasbourg, 8 allée du Général Rouvillois, 67000, Strasbourg, France
| | - Patrice Bourgin
- Institute for Cellular and Integrative Neurosciences (INCI)-UPR 3212-CNRS/University of Strasbourg, 8 allée du Général Rouvillois, 67000, Strasbourg, France.
- Sleep Disorders Center and CIRCSom (International Research Center for ChronoSomnology), Strasbourg University Hospital, 1 place de l'Hôpital, 67000, Strasbourg, France.
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4
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Bellfy L, Smies CW, Bernhardt AR, Bodinayake KK, Sebastian A, Stuart EM, Wright DS, Lo CY, Murakami S, Boyd HM, von Abo MJ, Albert I, Kwapis JL. The clock gene Per1 may exert diurnal control over hippocampal memory consolidation. Neuropsychopharmacology 2023; 48:1789-1797. [PMID: 37264172 PMCID: PMC10579262 DOI: 10.1038/s41386-023-01616-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 05/17/2023] [Accepted: 05/19/2023] [Indexed: 06/03/2023]
Abstract
The circadian system influences many different biological processes, including memory performance. While the suprachiasmatic nucleus (SCN) functions as the brain's central pacemaker, downstream "satellite clocks" may also regulate local functions based on the time of day. Within the dorsal hippocampus (DH), for example, local molecular oscillations may contribute to time-of-day effects on memory. Here, we used the hippocampus-dependent Object Location Memory task to determine how memory is regulated across the day/night cycle in mice. First, we systematically determined which phase of memory (acquisition, consolidation, or retrieval) is modulated across the 24 h day. We found that mice show better long-term memory performance during the day than at night, an effect that was specifically attributed to diurnal changes in memory consolidation, as neither memory acquisition nor memory retrieval fluctuated across the day/night cycle. Using RNA-sequencing we identified the circadian clock gene Period1 (Per1) as a key mechanism capable of supporting this diurnal fluctuation in memory consolidation, as learning-induced Per1 oscillates in tandem with memory performance in the hippocampus. We then show that local knockdown of Per1 within the DH impairs spatial memory without affecting either the circadian rhythm or sleep behavior. Thus, Per1 may independently function within the DH to regulate memory in addition to its known role in regulating the circadian system within the SCN. Per1 may therefore exert local diurnal control over memory consolidation within the DH.
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Affiliation(s)
- Lauren Bellfy
- Department of Biology, Pennsylvania State University, University Park, PA, 16802, USA
- Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Chad W Smies
- Department of Biology, Pennsylvania State University, University Park, PA, 16802, USA
| | - Alicia R Bernhardt
- Department of Biology, Pennsylvania State University, University Park, PA, 16802, USA
| | - Kasuni K Bodinayake
- Department of Biology, Pennsylvania State University, University Park, PA, 16802, USA
| | - Aswathy Sebastian
- Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Emily M Stuart
- Department of Biology, Pennsylvania State University, University Park, PA, 16802, USA
| | - Destiny S Wright
- Department of Biology, Pennsylvania State University, University Park, PA, 16802, USA
| | - Chen-Yu Lo
- Department of Biology, Pennsylvania State University, University Park, PA, 16802, USA
| | - Shoko Murakami
- Department of Biology, Pennsylvania State University, University Park, PA, 16802, USA
| | - Hannah M Boyd
- Department of Biology, Pennsylvania State University, University Park, PA, 16802, USA
- Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Megan J von Abo
- Department of Biology, Pennsylvania State University, University Park, PA, 16802, USA
| | - Istvan Albert
- Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802, USA
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Janine L Kwapis
- Department of Biology, Pennsylvania State University, University Park, PA, 16802, USA.
- Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802, USA.
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5
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Watt G, Karl T, Chesworth R. Light phase does not affect operant sucrose self-administration in adult male C57BL/6JAbr mice. Behav Brain Res 2023; 454:114650. [PMID: 37640271 DOI: 10.1016/j.bbr.2023.114650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 08/11/2023] [Accepted: 08/25/2023] [Indexed: 08/31/2023]
Abstract
Circadian rhythm can have significant impacts on several physiological domains relevant to the expression of behaviour in mice, including body temperature, corticosterone levels, hormones and immune function. Mice are nocturnal; yet many behavioural studies are performed during the light phase, when mice are naturally inactive. Not surprisingly, the time of day when mice are behaviourally tested can significantly impact on domains such as locomotor activity, e.g. dark phase testing results in higher locomotion rates than light phase testing. However, effects on other behavioural domains, such as cognition, are not well-established, with inconsistent reports on improved cognition during dark phase testing compared to light phase testing in mice. Importantly, the impact of circadian rhythm on operant responding, a common task relevant to research into drug abuse and cognitive disorders, has rarely been investigated in mice. Here we evaluated if testing adult male C57BL/6JAbr mice in operant chambers during the light or dark phase affects acquisition of lever responding, lever discrimination under different fixed ratio (FR) schedules (FR1, FR2, FR4), and/or motivation under a progressive ratio schedule for 10% oral sucrose. We found no effect of circadian rhythm on levels of active and inactive lever pressing, or lever discrimination for oral sucrose at any stage of the experiment. These results may be due to high levels of motivation for sucrose under food restriction and low levels of task complexity limiting detection of any effect of light phase on operant behaviour.
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Affiliation(s)
- Georgia Watt
- School of Medicine, Western Sydney University, Campbelltown, NSW, Australia
| | - Tim Karl
- School of Medicine, Western Sydney University, Campbelltown, NSW, Australia
| | - Rose Chesworth
- School of Medicine, Western Sydney University, Campbelltown, NSW, Australia.
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Barros CFD, Guarnieri LDO, Mansk LMZ, Secio-Silva A, Emrich F, Ferreira M, Silva WND, Peliciari-Garcia RA, Pereira GS, Bargi-Souza P. The memory impairment by hypothyroidism in mice is dependent on time-of-day and sex. Behav Brain Res 2023; 452:114595. [PMID: 37482305 DOI: 10.1016/j.bbr.2023.114595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 07/18/2023] [Accepted: 07/20/2023] [Indexed: 07/25/2023]
Abstract
Hypothyroidism is an endocrine-metabolic disorder, and as such it compromises a wide range of physiological functions. Memory deficits and, the most recently described, circadian rhythm disruption are among the impairments caused by thyroid dysfunctions. However, although highly likely, there is no evidence connecting these two effects of hypothyroidism. Here, we hypothesized the time-of-day interferes with the memory deficit caused by hypothyroidism. C57BL/6 J mice from both sexes were subjected to novel object recognition (NOR) task during the rest and active phases, corresponding to ZT 2-4 and 14-16, respectively (ZT: Zeitgeber time; ZT 0: lights on at 07:00 am). First, we showed that neither sex nor ZT altered object recognition memory (ORM) in euthyroid mice. Next, animals were divided into control (euthyroid) and hypothyroid [induced with methimazole (0.01%) and perchlorate (0.1%) treatment in the drinking water for 21 days] groups. Under euthyroid conditions, male and female mice recognized the novel object regardless of the time-of-day. However, hypothyroidism impaired ORM at rest phase (ZT 2-4) in both sexes. Surprisingly, in the active phase (ZT 14-16), the hypothyroid males performed the NOR, though a longer time to execute the task was required. In contrast, female hypothyroid mice showed a greater impairment in ORM. Our results suggest that hypothyroidism may disrupt the circadian rhythm in brain areas related to mnemonic processes since in euthyroid condition ORM is not affected by the time-of-day. Furthermore, our findings in an animal model indicate a pronounced deleterious effect of hypothyroidism in women.
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Affiliation(s)
- Carolina Fonseca de Barros
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Leonardo de Oliveira Guarnieri
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil; Centro de Tecnologia e Pesquisa em Magneto Ressonância, Programa de Pós-Graduação em Engenharia Elétrica, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Lara Monteiro Zanetti Mansk
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Ayla Secio-Silva
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Felipe Emrich
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Maíza Ferreira
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Walison Nunes da Silva
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Rodrigo Antonio Peliciari-Garcia
- Departamento de Ciências Biológicas, Setor de Morfofisiologia e Patologia, Universidade Federal de São Paulo (UNIFESP), Diadema, SP, Brazil
| | - Grace Schenatto Pereira
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil.
| | - Paula Bargi-Souza
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil.
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Shimizu K, Inoue KI, Oishi T, Takada M, Fukada Y, Imai H. Diurnal variation in declarative memory and the involvement of SCOP in cognitive functions in nonhuman primates. Mol Brain 2023; 16:31. [PMID: 36966302 PMCID: PMC10039603 DOI: 10.1186/s13041-023-01022-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 03/22/2023] [Indexed: 03/27/2023] Open
Abstract
Cognitive functions depend on the time of day in various organisms. Previously, we found that 24-h recognition memory performance of nocturnal mice changes diurnally through SCOP protein-dependent regulation. It remains unknown whether diurnal change and SCOP-dependent regulation of memory performance are conserved across species with diurnal/nocturnal habits. We tested whether the memory performance of diurnal Japanese macaques depends on the time of day. The memory association between bitter taste of drinking water and the nozzle color of the water bottle was established during the light period of the day to evaluate of memory performance for macaques. Here we found diurnal variation of declarative memory in Japanese macaques. The middle of the daytime is the most effective time for memory performance during the light period. To assess whether SCOP is involved in declarative memory performance, we interfered with SCOP expression by using lentiviral vector expressing shRNA against Scop in the hippocampus of Japanese macaques. Scop knockdown in the hippocampus abrogated the memory performance in the middle of the daytime. Our results implicate that SCOP in the hippocampus is necessary for the diurnal rhythm of the memory system and that the SCOP-dependent memory regulation system may be conserved in mammals.
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Affiliation(s)
- Kimiko Shimizu
- Department of Biological Sciences, School of Science, The University of Tokyo, Tokyo, 113-0033, Japan.
- Department of Pathological Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan.
- Laboratory of Animal Resources, Graduate School of Medicine, Center for Disease Biology and Integrative Medicine, The University of Tokyo, Tokyo, 113-0033, Japan.
| | - Ken-Ichi Inoue
- Systems Neuroscience Section, Center for the Evolutionary Origins of Human Behavior, Kyoto University, Inuyama, Aichi, 484-8506, Japan
| | - Takao Oishi
- Systems Neuroscience Section, Center for the Evolutionary Origins of Human Behavior, Kyoto University, Inuyama, Aichi, 484-8506, Japan
| | - Masahiko Takada
- Systems Neuroscience Section, Center for the Evolutionary Origins of Human Behavior, Kyoto University, Inuyama, Aichi, 484-8506, Japan
| | - Yoshitaka Fukada
- Department of Biological Sciences, School of Science, The University of Tokyo, Tokyo, 113-0033, Japan.
- Laboratory of Animal Resources, Graduate School of Medicine, Center for Disease Biology and Integrative Medicine, The University of Tokyo, Tokyo, 113-0033, Japan.
| | - Hiroo Imai
- Molecular Biology Section, Center for the Evolutionary Origins of Human Behavior, Kyoto University, Inuyama, Aichi, 484-8506, Japan.
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Foakes C, Lawrence-Sidebottom D, Dralega AT, Harvey DO, Schmidt MA, Davis CJ. The rat Lux Actuating Search Task (LAST) and effects of sleep deprivation on task reversal performance. Neurobiol Sleep Circadian Rhythms 2022; 13:100081. [PMID: 35989719 PMCID: PMC9388875 DOI: 10.1016/j.nbscr.2022.100081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 08/10/2022] [Accepted: 08/10/2022] [Indexed: 11/30/2022] Open
Abstract
Sleep deprivation (SD) causes significant deficits in multiple aspects of cognition, including sustained attention and working memory. Investigating the neural processes underpinning these cognitive losses has proven challenging due to the confounds of current animal tasks; many employ appetitive or aversive stimuli to motivate behavior, while others lack task complexity that translates to human studies of executive function. We established the Lux Actuating Search Task (LAST) to circumvent these issues. The LAST is performed in a circular, open-field arena that requires rats to find an unmarked, quasi-randomly positioned target. Constant low-level floor vibrations motivate ambulation, while light intensity (determined by the rodent's proximity to the target destination) provides continuous visual feedback. The task has two paradigms that differ based on the relationship between the light intensity and target proximity: the Low Lux Target (LLT) paradigm and the High Lux Target paradigm (HLT). In this study, on days 1–6, the rats completed nine trials per day on one of the two paradigms. On day 7, the rats were either sleep deprived by gentle handling or were left undisturbed before undertaking the opposite (reversal) paradigm on days 7–9. Our results showed that SD significantly impeded the ability of Long Evans rats to learn the reversal paradigm, as indicated by increased times to target and increased failure percentages compared to rats whose sleep was undisturbed. Rats also showed reduced learning with the HLT paradigm, as the initial task or as the reversal task, likely due to the rodents' photophobia limiting their motivation to navigate toward a bright light, which is required to succeed. A continuous feedback paradigm examining the effects of sleep loss on cognitive flexibility in rats is introduced. Floor vibrations motivate and variable light intensity directs navigation to an unmarked location in an open field arena. The reversal of light intensity cues from light to dark and vice versa is disrupted by sleep deprivation.
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Affiliation(s)
- Callum Foakes
- Elson S. Floyd College of Medicine and Sleep and Performance Research Center, Washington State University, Spokane, WA, USA
| | - Darian Lawrence-Sidebottom
- Elson S. Floyd College of Medicine and Sleep and Performance Research Center, Washington State University, Spokane, WA, USA
| | - Aseru T Dralega
- Elson S. Floyd College of Medicine and Sleep and Performance Research Center, Washington State University, Spokane, WA, USA
| | - Daniel O Harvey
- Elson S. Floyd College of Medicine and Sleep and Performance Research Center, Washington State University, Spokane, WA, USA
| | - Michelle A Schmidt
- Elson S. Floyd College of Medicine and Sleep and Performance Research Center, Washington State University, Spokane, WA, USA
| | - Christopher J Davis
- Elson S. Floyd College of Medicine and Sleep and Performance Research Center, Washington State University, Spokane, WA, USA
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Murphy HM, Kalinina AI, Wideman CH. Effects of Chronic Oral Administration of Midazolam on Memory and Circadian Rhythms in Rats. Drug Res (Stuttg) 2022; 73:40-45. [PMID: 36302539 PMCID: PMC9810437 DOI: 10.1055/a-1937-9064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Studies have shown the ability of benzodiazepine drugs to cause memory loss in animals and humans. Midazolam is a benzodiazepine commonly administered intravenously during surgical procedures because it reacts rapidly, causes anterograde amnesia, and has few side effects. It has also been used in palliative medicine where, among others, an oral route has been employed for chronic administration of the drug. The current study evaluated the effects of chronic orally administered midazolam on spatial working memory and procedural memory in control and experimental female rats over a three-week experimental period utilizing the Morris water maze. Sample and test run times to a submerged platform in the maze were recorded daily. In addition, activity wheels attached to each cage were employed to monitor daily circadian activity of the animals. Spatial working memory was not impaired in either group. However, procedural memory amnesia occurred in animals receiving the drug indicative of a consolidation or retrieval problem. Concerning circadian rhythms, a phase-shift was noted in experimental animals possibly indicating that time of day of drug administration is important. The findings of the present study could shed insight into altered reactions observed in humans who have received midazolam as a component of treatment in palliative medicine.
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Affiliation(s)
- Helen M. Murphy
- John Carroll University, University Heights, OH, USA,Corresponding Dr. Helen M.
Murphy Neuroscience Program, John Carroll University 1
John Carroll Blvd, University Heights44118
OHUSA(216) 397-4359(216)
397-1633
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10
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Jiang L, Liu C, Zhao B, Ma C, Yin Y, Zhou Q, Xu L, Mao R. Time of Day-Dependent Alteration of Hippocampal Rac1 Activation Regulates Contextual Fear Memory in Rats. Front Mol Neurosci 2022; 15:871679. [PMID: 35782392 PMCID: PMC9245039 DOI: 10.3389/fnmol.2022.871679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 05/13/2022] [Indexed: 12/03/2022] Open
Abstract
Fear memory in species varies according to the time of the day. Although the underlying molecular mechanisms have been extensively explored, they remain largely unknown. Here, we report that hippocampal Rac1 activity undergoes a time of day-dependent alteration both in nocturnal rats and diurnal tree shrews and that training at the lower hippocampal Rac1 activation period during the night leads to better contextual fear memory in rats. Furthermore, day and night reversion by 24 h darkness/24 h light housing inverses the external clock time of hippocampal Rac1 activation, but the better contextual fear memory still coincides with the lower Rac1 activation in rats during the night. Interestingly, exogenous melatonin treatment promotes hippocampal Rac1 activity and impairs better contextual fear memory acquired at the lower Rac1 activation period during the night, and Rac1-specific inhibitor NSC23766 compromises the effect of melatonin. These results suggest that the time of day-dependent alteration of hippocampal Rac1 activation regulates contextual fear memory in rats by forgetting.
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Affiliation(s)
- Lizhu Jiang
- CAS Key Laboratory of Animal Models and Human Disease Mechanisms, KIZ-SU Joint Laboratory of Animal Model and Drug Development, Laboratory of Learning and Memory, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Department of Clinical Psychology, The Third People’s Hospital of Yunnan Province, Kunming, China
- Department of Neuropsychopathy, Clinical Medical School, Dali University, Dali, China
| | - Chao Liu
- CAS Key Laboratory of Animal Models and Human Disease Mechanisms, KIZ-SU Joint Laboratory of Animal Model and Drug Development, Laboratory of Learning and Memory, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, China
| | - Baizhen Zhao
- CAS Key Laboratory of Animal Models and Human Disease Mechanisms, KIZ-SU Joint Laboratory of Animal Model and Drug Development, Laboratory of Learning and Memory, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, China
| | - Chen Ma
- CAS Key Laboratory of Animal Models and Human Disease Mechanisms, KIZ-SU Joint Laboratory of Animal Model and Drug Development, Laboratory of Learning and Memory, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, China
| | - Yan Yin
- Department of Clinical Psychology, The Third People’s Hospital of Yunnan Province, Kunming, China
| | - Qixin Zhou
- CAS Key Laboratory of Animal Models and Human Disease Mechanisms, KIZ-SU Joint Laboratory of Animal Model and Drug Development, Laboratory of Learning and Memory, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, China
| | - Lin Xu
- CAS Key Laboratory of Animal Models and Human Disease Mechanisms, KIZ-SU Joint Laboratory of Animal Model and Drug Development, Laboratory of Learning and Memory, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, China
- CAS Centre for Excellence in Brain Science and Intelligent Technology, Shanghai, China
- *Correspondence: Lin Xu,
| | - RongRong Mao
- Department of Pathology and Pathophysiology, School of Basic Medical Science, Kunming Medical University, Kunming, China
- RongRong Mao,
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11
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Butler-Struben HM, Kentner AC, Trainor BC. What's wrong with my experiment?: The impact of hidden variables on neuropsychopharmacology research. Neuropsychopharmacology 2022; 47:1285-1291. [PMID: 35338255 PMCID: PMC9117327 DOI: 10.1038/s41386-022-01309-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 02/22/2022] [Accepted: 03/10/2022] [Indexed: 12/24/2022]
Abstract
The field of neuropsychopharmacology relies on behavioral assays to quantify behavioral processes related to mental illness and substance use disorders. Although these assays have been highly informative, sometimes laboratories have unpublished datasets from experiments that "didn't work". Often this is because expected outcomes were not observed in positive or negative control groups. While this can be due to experimenter error, an important alternative is that under-appreciated environmental factors can have a major impact on results. "Hidden variables" such as circadian cycles, husbandry, and social environments are often omitted in methods sections, even though there is a strong body of literature documenting their impact on physiological and behavioral outcomes. Applying this knowledge in a more critical manner could provide behavioral neuroscientists with tools to develop better testing methods, improve the external validity of behavioral techniques, and make better comparisons of experimental data across institutions. Here we review the potential impact of "hidden variables" that are commonly overlooked such as light-dark cycles, transport stress, cage ventilation, and social housing structure. While some of these conditions may not be under direct control of investigators, it does not diminish the potential impact of these variables on experimental results. We provide recommendations to investigators on which variables to report in publications and how to address "hidden variables" that impact their experimental results.
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Affiliation(s)
| | - Amanda C Kentner
- School of Arts & Sciences, Massachusetts College of Pharmacy and Health Sciences, Boston, MA, 02115, USA
| | - Brian C Trainor
- Animal Behavior Graduate Group, University of California, Davis, CA, 95616, USA.
- Department of Psychology, University of California, Davis, CA, 95616, USA.
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12
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Tsao CH, Flint J, Huang GJ. Influence of diurnal phase on behavioral tests of sensorimotor performance, anxiety, learning and memory in mice. Sci Rep 2022; 12:432. [PMID: 35013366 PMCID: PMC8748730 DOI: 10.1038/s41598-021-03155-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 11/24/2021] [Indexed: 12/16/2022] Open
Abstract
Behavioral measurements in mice are critical tools used to evaluate the effects of interventions. Whilst mice are nocturnal animals, many studies conduct behavioral tests during the day. To better understand the effects of diurnal rhythm on mouse behaviors, we compared the results from behavioral tests conducted in the active and inactive phases. C57BL/6 mice were used in this study; we focus on sensorimotor performance, anxiety, learning and memory. Overall, our results show mice exhibit slightly higher cutaneous sensitivity, better long-term contextual memory, and a greater active avoidance escape response during the active phase. We did not observe significant differences in motor coordination, anxiety, or spatial learning and memory. Furthermore, apart from the elevated-O-maze, there was no remarkable sex effect among these tests. This study provides information on the effects of different diurnal phases on types of behavior and demonstrates the importance of the circadian cycle on learning and memory. Although we did not detect differences in anxiety and spatial learning/memory, diurnal rhythm may interact with other factors to influence these behaviors.
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Affiliation(s)
- Chi-Hui Tsao
- Department and Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, 33302, Taiwan
| | - Jonathan Flint
- Center for Neurobehavioral Genetics, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Guo-Jen Huang
- Department and Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, 33302, Taiwan.
- Department of Neurology, Chang Gung Memorial Hospital-Linkou Medical Center, Taoyuan 333, Taiwan.
- Healthy Aging Research Center, Chang Gung University, Taoyuan, 33302, Taiwan.
- Molecular Medicine Research Center, Chang Gung University, Taoyuan, 33302, Taiwan.
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13
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Spatial working memory is disparately interrelated with social status through different developmental stages in rats. Behav Brain Res 2022; 416:113547. [PMID: 34437940 DOI: 10.1016/j.bbr.2021.113547] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 08/15/2021] [Accepted: 08/21/2021] [Indexed: 02/02/2023]
Abstract
Social life necessitates cognitive competence to meet the dynamic demands of social development. The formation of dominance hierarchy is a general phenomenon in social groups. As an essential element of executive and cognitive function, working memory could influence and be influenced by social status in a dominance hierarchy. However, the direction and degree of the association between them through different developmental stages remain unclear. To address this issue and clarify the "cause or consequence" problem, we investigated the spatial working memory performance in a Y-maze and Morris water maze in home-caged sibling Wistar rats (N = 26 cages, three rats/cage) through three stages of their life: before (week 7), during (week 10), and after (week 20) assumed timings of the social dominance hierarchy formation (SDHF). We used the social dominance tube test during the assumed time of hierarchy formation (weeks 9-11) to measure the relative dominance status in each cage. Here, we found that higher working memory index before SDHF could be predictive of later acquisition of higher social status. Working memory performance declined for all animals during SDHF, in which agonistic conflicts are increased. However, living within an established hierarchical social network for several weeks deteriorated the working memory performance of dominant and middle-ranked animals, while the performance of subordinates improved and got significantly better than higher-ranked animals. In conclusion, while working memory and social status were correlated positively before dominance hierarchy formation, there was a trade-off between them after the formation of it. In contrast to the common view, these results highlight the adverse effect of higher social status on cognitive behavior.
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14
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Asadian N, Parsaie H, Vafaei AA, Dadkhah M, Omoumi S, Sedaghat K. Chronic light deprivation induces different effects on spatial and fear memory and hippocampal BDNF/TRKB expression during light and dark phases of rat diurnal rhythm. Behav Brain Res 2021; 418:113638. [PMID: 34695541 DOI: 10.1016/j.bbr.2021.113638] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 09/11/2021] [Accepted: 10/18/2021] [Indexed: 11/02/2022]
Abstract
Disruptions in light/dark cycle have been associated with an altered ability to form and retrieve memory in human and animals. Animal studies have shown that chronic light deprivation disrupts the light/dark cycle and alters the neural connections that mediate hippocampal memory formation. In order to better understand how light deprivation affects the formation and retrieval of memory in adult rats, we examined the effect of total darkness on spatial and auditory fear learning and memory formation and BDNF/TRKB protein levels during the light and dark phases of the rat circadian cycle. Male Wistar rats (n = 60), were randomly divided into two main groups: normal rearing (NR, 12 h light/dark cycle for 3 weeks) and dark rearing (DR, kept in constant darkness for 3 weeks); and each of these groups had a "light (day)" and "dark (night)" sub-group. After 3 weeks, the Morris Water maze and auditory fear conditioning were used to assess spatial and fear memory acquisition and retrieval, respectively. BDNF and TRKB protein levels in the hippocampus of rats from the four sub-groups were measured by Western blot, at the completion of the 3 week constant darkness exposure and after the behavioral experiments. These studies revealed that DR for 3 weeks impaired spatial memory retrieval and enhanced extinction of auditory fear memory specifically during the light (day) phase. DR also eliminated the normal fluctuations in BDNF/TRKB levels observed in the hippocampus across the light/dark cycle.
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Affiliation(s)
- Nader Asadian
- Department of Biophysics, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran.
| | - Houman Parsaie
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Abbas Ali Vafaei
- Research Center of Physiology, Semnan University of Medical Sciences, Semnan, Iran.
| | - Masoumeh Dadkhah
- Research Center of Physiology, Semnan University of Medical Sciences, Semnan, Iran.
| | - Samira Omoumi
- Research Center of Physiology, Semnan University of Medical Sciences, Semnan, Iran.
| | - Katayoun Sedaghat
- Research Center of Physiology, Semnan University of Medical Sciences, Semnan, Iran.
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15
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Nelson RJ, Bumgarner JR, Walker WH, DeVries AC. Time-of-day as a critical biological variable. Neurosci Biobehav Rev 2021; 127:740-746. [PMID: 34052279 PMCID: PMC8504485 DOI: 10.1016/j.neubiorev.2021.05.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 04/20/2021] [Accepted: 05/17/2021] [Indexed: 12/13/2022]
Abstract
Time-of-day is a crucial, yet often overlooked, biological variable in biomedical research. We examined the top 25 most cited papers in several domains of behavioral neuroscience to determine whether time-of-day information was reported. The majority of studies report behavioral testing conducted during the day, which does not coincide with the optimal time to perform the testing from an functional perspective of the animals being tested. The majority of animal models used in biomedical research are nocturnal rodents; thus, testing during the light phase (i.e. animals' rest period) may alter the results and introduce variability across studies. Time-of-day is rarely considered in analyses or reported in publications; the majority of publications fail to include temporal details when describing their experimental methods, and those few that report testing during the dark rarely report whether measures are in place to protect from exposure to extraneous light. We propose that failing to account for time-of-day may compromise replication of findings across behavioral studies and reduce their value when extrapolating results to diurnal humans.
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Affiliation(s)
- Randy J Nelson
- Department of Neuroscience, Rockefeller Neuroscience Institute, Morgantown, WV, 26506, USA; West Virginia Clinical and Translational Science Institute, West Virginia University, Morgantown, WV, 26506, USA.
| | - Jacob R Bumgarner
- Department of Neuroscience, Rockefeller Neuroscience Institute, Morgantown, WV, 26506, USA
| | - William H Walker
- Department of Neuroscience, Rockefeller Neuroscience Institute, Morgantown, WV, 26506, USA; West Virginia Clinical and Translational Science Institute, West Virginia University, Morgantown, WV, 26506, USA
| | - A Courtney DeVries
- Department of Neuroscience, Rockefeller Neuroscience Institute, Morgantown, WV, 26506, USA; Department of Medicine, Division of Hematology and Oncology, Morgantown, WV, 26506, USA; WVU Cancer Institute, Morgantown, WV, 26506, USA; West Virginia Clinical and Translational Science Institute, West Virginia University, Morgantown, WV, 26506, USA
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16
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Effect of uremic toxins on hippocampal cell damage: analysis in vitro and in rat model of chronic kidney disease. Heliyon 2021; 7:e06221. [PMID: 33659745 PMCID: PMC7892929 DOI: 10.1016/j.heliyon.2021.e06221] [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: 09/04/2020] [Revised: 10/16/2020] [Accepted: 02/04/2021] [Indexed: 12/15/2022] Open
Abstract
One third of the patients with chronic kidney disease (CKD) develop cognitive impairment, which is also an independent risk factor for mortality. However, the concise mechanism of cerebro-renal interaction has not been clarified. The present study examines the effects of uremic toxins on neuronal cells and analyzes the pathological condition of the brain using mouse hippocampal neuronal HT-22 cells and adenine-induced CKD model rats. Among the uremic toxins analyzed, indoxyl sulfate, indole, 3-indoleacetate, and methylglyoxal significantly decreased viability and glutathione level in HT-22 cells. The mixture of these uremic toxins also decreased viability and glutathione level at a lower dose. Adenine-induced CKD rat showed marked renal damage, increased urinary oxidative stress markers, and increased numbers of pyknotic neuronal cells in hippocampus. CKD rats with damaged hippocampus demonstrated poor learning process when tested using the Morris water maze test. Our results suggest that uremic toxins have a toxic effect on hippocampal neuronal cells and uremic CKD rats shows pyknosis in hippocampus.
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17
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Daily oscillation of cognitive factors is modified in the temporal cortex of an amyloid β(1-42)-induced rat model of Alzheimer's disease. Brain Res Bull 2021; 170:106-114. [PMID: 33508401 DOI: 10.1016/j.brainresbull.2021.01.014] [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: 10/06/2020] [Revised: 12/28/2020] [Accepted: 01/20/2021] [Indexed: 01/06/2023]
Abstract
Alzheimer's disease (AD) is a devastating disease characterized by loss of synapses and neurons in the elderly. Accumulation of the β-amyloid peptide (Aβ) in the brain is thought to be central to the pathogenesis of AD. ApoE plays a key role in normal and physiological clearance of Aß, since it facilitates the peptide intra- and extracellular proteolytic degradation. Besides the cognitive deficit, AD patients also show alterations in their circadian rhythms. The objective of this study was to investigate the effects of an i.c.v. injection of Aβ (1-42) peptide on the 24 h rhythms of Apo E, BMAL1, RORα, Bdnf and trkB mRNA and Aβ levels in the rat temporal cortex. We found that an i.c.v. injection of Aβ aggregates phase shifts daily Bdnf expression as well as Apo E, BMAL1, RORα, Aβ and decreased the mesor of TrkB rhythms. Thus, elevated Aβ peptide levels might modify the temporal patterns of cognition-related factors, probably; by affecting the clock factors rhythms as well as in the 24 h rhythms of Apo E.
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18
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Garrigos D, Martínez-Morga M, Toval A, Kutsenko Y, Barreda A, Do Couto BR, Navarro-Mateu F, Ferran JL. A Handful of Details to Ensure the Experimental Reproducibility on the FORCED Running Wheel in Rodents: A Systematic Review. Front Endocrinol (Lausanne) 2021; 12:638261. [PMID: 34040580 PMCID: PMC8141847 DOI: 10.3389/fendo.2021.638261] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 04/16/2021] [Indexed: 12/21/2022] Open
Abstract
A well-documented method and experimental design are essential to ensure the reproducibility and reliability in animal research. Experimental studies using exercise programs in animal models have experienced an exponential increase in the last decades. Complete reporting of forced wheel and treadmill exercise protocols would help to ensure the reproducibility of training programs. However, forced exercise programs are characterized by a poorly detailed methodology. Also, current guidelines do not cover the minimum data that must be included in published works to reproduce training programs. For this reason, we have carried out a systematic review to determine the reproducibility of training programs and experimental designs of published research in rodents using a forced wheel system. Having determined that most of the studies were not detailed enough to be reproducible, we have suggested guidelines for animal research using FORCED exercise wheels, which could also be applicable to any form of forced exercise.
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Affiliation(s)
- Daniel Garrigos
- Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of Murcia, Murcia, Spain
- Institute of Biomedical Research of Murcia—IMIB, Virgen de la Arrixaca University Hospital, University of Murcia, Murcia, Spain
| | - Marta Martínez-Morga
- Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of Murcia, Murcia, Spain
- Institute of Biomedical Research of Murcia—IMIB, Virgen de la Arrixaca University Hospital, University of Murcia, Murcia, Spain
| | - Angel Toval
- Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of Murcia, Murcia, Spain
- Institute of Biomedical Research of Murcia—IMIB, Virgen de la Arrixaca University Hospital, University of Murcia, Murcia, Spain
| | - Yevheniy Kutsenko
- Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of Murcia, Murcia, Spain
- Institute of Biomedical Research of Murcia—IMIB, Virgen de la Arrixaca University Hospital, University of Murcia, Murcia, Spain
| | - Alberto Barreda
- Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of Murcia, Murcia, Spain
- Institute of Biomedical Research of Murcia—IMIB, Virgen de la Arrixaca University Hospital, University of Murcia, Murcia, Spain
| | - Bruno Ribeiro Do Couto
- Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of Murcia, Murcia, Spain
- Institute of Biomedical Research of Murcia—IMIB, Virgen de la Arrixaca University Hospital, University of Murcia, Murcia, Spain
- Faculty of Psychology, University of Murcia, Murcia, Spain
| | - Fernando Navarro-Mateu
- Institute of Biomedical Research of Murcia—IMIB, Virgen de la Arrixaca University Hospital, University of Murcia, Murcia, Spain
- Unidad de Docencia, Investigación y Formación en Salud Mental (UDIF-SM), Servicio Murciano de Salud, Murcia, Spain
- CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Departamento de Psicología Básica y Metodología, Universidad de Murcia, Murcia, Spain
| | - José Luis Ferran
- Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of Murcia, Murcia, Spain
- Institute of Biomedical Research of Murcia—IMIB, Virgen de la Arrixaca University Hospital, University of Murcia, Murcia, Spain
- *Correspondence: José Luis Ferran,
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19
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Davis JA, Paul JR, McMeekin LJ, Nason SR, Antipenko JP, Yates SD, Cowell RM, Habegger KM, Gamble KL. High-Fat and High-Sucrose Diets Impair Time-of-Day Differences in Spatial Working Memory of Male Mice. Obesity (Silver Spring) 2020; 28:2347-2356. [PMID: 33043637 PMCID: PMC7686286 DOI: 10.1002/oby.22983] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 07/10/2020] [Accepted: 07/16/2020] [Indexed: 11/10/2022]
Abstract
OBJECTIVE This study aimed to investigate both the long-term and short-term impacts of high-fat diets (HFD) or high-sucrose diets (HSD) on the normal diurnal pattern of cognitive function, protein expression, and the molecular clock in mice. METHODS This study used both 6-month and 4-week feeding strategies by providing male C57BL/6J mice access to either a standard chow, HFD, or HSD. Spatial working memory and synaptic plasticity were assessed both day and night, and hippocampal tissue was measured for changes in NMDA and AMPA receptor subunits (GluN2B, GluA1), as well as molecular clock gene expression. RESULTS HFD and HSD both disrupted normal day/night fluctuations in spatial working memory and synaptic plasticity. Mice fed HFD altered their food intake to consume more calories during the day. Both diets disrupted normal hippocampal clock gene expression, and HFD reduced GluN2B levels in hippocampal tissue. CONCLUSIONS Taken together, these results suggest that both HFD and HSD induce a loss of day/night performance in spatial working memory and synaptic plasticity as well as trigger a cascade of changes that include disruption to the hippocampal molecular clock.
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Affiliation(s)
- Jennifer A. Davis
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Jodi R. Paul
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, Birmingham, AL, USA
| | | | - Shelly R. Nason
- Department of Medicine, Division of Endocrinology, Diabetes& Metabolism, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Jessica P. Antipenko
- Department of Medicine, Division of Endocrinology, Diabetes& Metabolism, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Stefani D. Yates
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Rita M. Cowell
- Department of Neuroscience, Southern Research, Birmingham, AL
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL
| | - Kirk M. Habegger
- Department of Medicine, Division of Endocrinology, Diabetes& Metabolism, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Karen L. Gamble
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, Birmingham, AL, USA
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20
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Marti AR, Pedersen TT, Wisor JP, Mrdalj J, Holmelid Ø, Patil S, Meerlo P, Bramham CR, Grønli J. Cognitive function and brain plasticity in a rat model of shift work: role of daily rhythms, sleep and glucocorticoids. Sci Rep 2020; 10:13141. [PMID: 32753733 PMCID: PMC7403587 DOI: 10.1038/s41598-020-69969-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 07/14/2020] [Indexed: 02/06/2023] Open
Abstract
Many occupations require operations during the night-time when the internal circadian clock promotes sleep, in many cases resulting in impairments in cognitive performance and brain functioning. Here, we use a rat model to attempt to identify the biological mechanisms underlying such impaired performance. Rats were exposed to forced activity, either in their rest-phase (simulating night-shift work; rest work) or in their active-phase (simulating day-shift work; active work). Sleep, wakefulness and body temperature rhythm were monitored throughout. Following three work shifts, spatial memory performance was tested on the Morris Water Maze task. After 4 weeks washout, the work protocol was repeated, and blood and brain tissue collected. Simulated night-shift work impaired spatial memory and altered biochemical markers of cerebral cortical protein synthesis. Measures of daily rhythm strength were blunted, and sleep drive increased. Individual variation in the data suggested differences in shift work tolerance. Hierarchical regression analyses revealed that type of work, changes in daily rhythmicity and changes in sleep drive predict spatial memory performance and expression of brain protein synthesis regulators. Moreover, serum corticosterone levels predicted expression of brain protein synthesis regulators. These findings open new research avenues into the biological mechanisms that underlie individual variation in shift work tolerance.
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Affiliation(s)
- Andrea R Marti
- Bergen Stress and Sleep Group, Department of Biological and Medical Psychology, Faculty of Psychology, University of Bergen, Jonas Liesvei 91, 5009, Bergen, Norway. .,Bergen Stress and Sleep Group, Department of Biological and Medical Psychology, Faculty of Psychology, University of Bergen, Jonas Liesvei 91, 5009, Bergen, Norway.
| | - Torhild T Pedersen
- Bergen Stress and Sleep Group, Department of Biological and Medical Psychology, Faculty of Psychology, University of Bergen, Jonas Liesvei 91, 5009, Bergen, Norway
| | - Jonathan P Wisor
- College of Medicine, Washington State University, Spokane, WA, USA
| | - Jelena Mrdalj
- Bergen Stress and Sleep Group, Department of Biological and Medical Psychology, Faculty of Psychology, University of Bergen, Jonas Liesvei 91, 5009, Bergen, Norway
| | - Øystein Holmelid
- Bergen Stress and Sleep Group, Department of Biological and Medical Psychology, Faculty of Psychology, University of Bergen, Jonas Liesvei 91, 5009, Bergen, Norway
| | - Sudarshan Patil
- Department of Biomedicine, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Peter Meerlo
- Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands
| | - Clive R Bramham
- Department of Biomedicine, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Janne Grønli
- Bergen Stress and Sleep Group, Department of Biological and Medical Psychology, Faculty of Psychology, University of Bergen, Jonas Liesvei 91, 5009, Bergen, Norway
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21
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He Y, Li Y, Zhou F, Qi J, Wu M. Decreased circadian fluctuation in cognitive behaviors and synaptic plasticity in APP/PS1 transgenic mice. Metab Brain Dis 2020; 35:343-352. [PMID: 31879834 DOI: 10.1007/s11011-019-00531-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Accepted: 12/16/2019] [Indexed: 12/28/2022]
Abstract
Cognitive decline, memory impairment and circadian rhythm disturbance are iconic manifestations of Alzheimer's disease (AD). APPswe/PS1dE9 (APP/PS1) mice, a model of AD, show deficits in multiple learning and memory abilities, synaptic plasticity, and behavioral circadian rhythm, but whether circadian differences in cognitive performance and synaptic plasticity could be affected in AD remain unclear. Here, the cognitive behaviors of 6-month-old APP/PS1 mice were assessed by multiple behavior tests in the rest phase (light period) or active phase (dark period) of the day. The possible electrophysiological mechanism was subsequently investigated by in vivo hippocampal long-term potentiation (LTP) recording, and the locomotor activity rhythm of the mice was detected using wheel-running activities. Compared to wild-type (WT) mice, APP/PS1 mice exhibited long-term spatial memory impairment and in vivo hippocampal LTP suppression. In addition, in APP/PS1 mice, circadian differences in new object recognition memory and LTP were lost, and the circadian difference in long-term spatial memory was decreased, accompanied by a less robust locomotor activity rhythm. These results indicate that the loss of circadian differences in new object recognition memory and the decrease in the circadian difference in long-term spatial memory in APP/PS1 mice, which are closely associated with the loss of the circadian difference in LTP and less robust locomotor activity, might occur early in the course of AD.
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Affiliation(s)
- Yexin He
- Department of Radiology, Affiliated Provincial People's Hospital of Shanxi Medical University, Shanxi Provincial People's Hospital, Taiyuan, 030012, China
| | - Yiying Li
- Department of Physiology, Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China
| | - Fang Zhou
- Department of Physiology, Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China
| | - Jinshun Qi
- Department of Physiology, Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China
| | - Meina Wu
- Department of Physiology, Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China.
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22
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Sankowski R, Huerta TS, Kalra R, Klein TJ, Strohl JJ, Al-Abed Y, Robbiati S, Huerta PT. Large-Scale Validation of the Paddling Pool Task in the Clockmaze for Studying Hippocampus-Based Spatial Cognition in Mice. Front Behav Neurosci 2019; 13:121. [PMID: 31231197 PMCID: PMC6568215 DOI: 10.3389/fnbeh.2019.00121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 05/20/2019] [Indexed: 11/30/2022] Open
Abstract
Rationally designed behavioral tests are important tools to assess the function of specific brain regions. The hippocampus is a crucial neural substrate for spatial cognition, and many studies have linked hippocampal dysfunction with defects on spatial learning and memory in neurological conditions ranging from Alzheimer's disease to autoimmune syndromes, such as neuropsychiatric lupus. While our understanding of hippocampal function, from the molecular to the system levels, has increased dramatically over the last decades, this effort has not yet translated into efficacious therapies for cognitive impairment. We think that the availability of highly validated behavioral paradigms to measure cognition in mouse models is likely to enhance the potential success of preclinical therapeutic modalities. Here, we present an extensive study of the paddling pool task (PPT), first reported by Deacon and Rawlins, in which mice learn to escape from shallow water through a peripheral exit in a circular arena dubbed the clockmaze. We show that the PPT provides highly reliable results when assaying spatial cognition in C57/BL6 mice (120 males, 40 females) and BALB/c mice (40 males, 90 females). Additionally, we develop a robust algorithm for the assessment of escape strategies with clearly quantifiable readouts, enabling fine-granular phenotyping. Notably, the use of spatial strategy increases linearly across trials in the PPT. In a separate cohort of mice, we apply muscimol injections to silence the dorsal CA1 region of the hippocampus and show that the use of the spatial strategy in the PPT relies on the integrity of the dorsal hippocampus. Additionally, we compare directly the PPT and the Morris water maze (MWM) task in C57/BL6 mice (20 males, 20 females) and BALB/c mice (20 males, 20 females) and we find that the PPT induces significantly lower anxiety, exhaustion and hypothermia than the MWM. We conclude that the PPT provides a robust assessment of spatial cognition in mice, which can be applied in conjunction with other tests, to facilitate hypothesis testing and drug development to combat cognitive impairment.
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Affiliation(s)
- Roman Sankowski
- Laboratory of Immune & Neural Networks, Institute of Molecular Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Institute of Bioelectronic Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Elmezzi Graduate School of Molecular Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Faculty of Medicine, Institute of Neuropathology, University of Freiburg, Freiburg, Germany
| | - Tomás S. Huerta
- Laboratory of Immune & Neural Networks, Institute of Molecular Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Department of Molecular Medicine, Zucker School of Medicine at Hofstra/Northwell, Manhasset, NY, United States
| | - Rishi Kalra
- Laboratory of Immune & Neural Networks, Institute of Molecular Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
| | - Toby J. Klein
- Laboratory of Immune & Neural Networks, Institute of Molecular Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
| | - Joshua J. Strohl
- Laboratory of Immune & Neural Networks, Institute of Molecular Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Department of Molecular Medicine, Zucker School of Medicine at Hofstra/Northwell, Manhasset, NY, United States
| | - Yousef Al-Abed
- Institute of Bioelectronic Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Elmezzi Graduate School of Molecular Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Department of Molecular Medicine, Zucker School of Medicine at Hofstra/Northwell, Manhasset, NY, United States
| | - Sergio Robbiati
- Laboratory of Immune & Neural Networks, Institute of Molecular Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
| | - Patricio T. Huerta
- Laboratory of Immune & Neural Networks, Institute of Molecular Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Institute of Bioelectronic Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Elmezzi Graduate School of Molecular Medicine, Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, United States
- Department of Molecular Medicine, Zucker School of Medicine at Hofstra/Northwell, Manhasset, NY, United States
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Jilg A, Bechstein P, Saade A, Dick M, Li TX, Tosini G, Rami A, Zemmar A, Stehle JH. Melatonin modulates daytime-dependent synaptic plasticity and learning efficiency. J Pineal Res 2019; 66:e12553. [PMID: 30618149 PMCID: PMC6405292 DOI: 10.1111/jpi.12553] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 11/27/2018] [Accepted: 12/25/2018] [Indexed: 12/15/2022]
Abstract
Mechanisms of hippocampus-related memory formation are time-of-day-dependent. While the circadian system and clock genes are related to timing of hippocampal mnemonic processes (acquisition, consolidation, and retrieval of long-term memory [LTM]) and long-term potentiation (LTP), little is known about temporal gating mechanisms. Here, the role of the neurohormone melatonin as a circadian time cue for hippocampal signaling and memory formation was investigated in C3H/He wildtype (WT) and melatonin receptor-knockout ( MT 1 / 2 - / - ) mice. Immunohistochemical and immunoblot analyses revealed the presence of melatonin receptors on mouse hippocampal neurons. Temporal patterns of time-of-day-dependent clock gene protein levels were profoundly altered in MT 1 / 2 - / - mice compared to WT animals. On the behavioral level, WT mice displayed better spatial learning efficiency during daytime as compared to nighttime. In contrast, high error scores were observed in MT 1 / 2 - / - mice during both, daytime and nighttime acquisition. Day-night difference in LTP, as observed in WT mice, was absent in MT 1 / 2 - / - mice and in WT animals, in which the sympathetic innervation of the pineal gland was surgically removed to erase rhythmic melatonin synthesis. In addition, treatment of melatonin-deficient C57BL/6 mice with melatonin at nighttime significantly improved their working memory performance at daytime. These results illustrate that melatonin shapes time-of-day-dependent learning efficiency in parallel to consolidating expression patterns of clock genes in the mouse hippocampus. Our data suggest that melatonin imprints a time cue on mouse hippocampal signaling and gene expression to foster better learning during daytime.
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Affiliation(s)
- Antje Jilg
- Juha Hernesniemi International Neurosurgery Center, Henan Provincial People’s Hospital, School of Medicine, Henan University, Zhengzhou 450003, China
- Institute of Cellular and Molecular Anatomy, Goethe-University Frankfurt, Germany
| | - Philipp Bechstein
- Institute of Cellular and Molecular Anatomy, Goethe-University Frankfurt, Germany
| | - Anastasia Saade
- Institute of Cellular and Molecular Anatomy, Goethe-University Frankfurt, Germany
| | - Moritz Dick
- Institute of Cellular and Molecular Anatomy, Goethe-University Frankfurt, Germany
| | - Tian Xiao Li
- Juha Hernesniemi International Neurosurgery Center, Henan Provincial People’s Hospital, School of Medicine, Henan University, Zhengzhou 450003, China
| | - Gianluca Tosini
- Morehouse School of Medicine, Pharmacology & Toxicology, 720 Westview Drive SW, Atlanta, GA 30310-1495, USA
| | - Abdelhaq Rami
- Institute of Cellular and Molecular Anatomy, Goethe-University Frankfurt, Germany
| | - Ajmal Zemmar
- Juha Hernesniemi International Neurosurgery Center, Henan Provincial People’s Hospital, School of Medicine, Henan University, Zhengzhou 450003, China
- Brain Research Institute, University of Zurich, 8057 Zurich, Switzerland
- Department of Biology and Department of Health Sciences and Technology, ETH Zurich, CH-8057 Zurich, Switzerland
| | - Jörg H. Stehle
- Juha Hernesniemi International Neurosurgery Center, Henan Provincial People’s Hospital, School of Medicine, Henan University, Zhengzhou 450003, China
- Institute of Cellular and Molecular Anatomy, Goethe-University Frankfurt, Germany
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Mehla J, Deibel SH, Faraji J, Saito T, Saido TC, Mohajerani MH, McDonald RJ. Looking beyond the standard version of the Morris water task in the assessment of mouse models of cognitive deficits. Hippocampus 2018; 29:3-14. [DOI: 10.1002/hipo.22999] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 06/01/2018] [Accepted: 06/06/2018] [Indexed: 12/23/2022]
Affiliation(s)
- Jogender Mehla
- Canadian Center for Behavioural Neuroscience; University of Lethbridge, Lethbridge Alberta Canada
| | - Scott H. Deibel
- Canadian Center for Behavioural Neuroscience; University of Lethbridge, Lethbridge Alberta Canada
| | - Jamshid Faraji
- Canadian Center for Behavioural Neuroscience; University of Lethbridge, Lethbridge Alberta Canada
- Golestan University of Medical Sciences; Faculty of Nursing & Midwifery; Gorgan Islamic Republic of Iran
| | - Takashi Saito
- Laboratory for Proteolytic Neuroscience; RIKEN Brain Science Institute; Saitama Japan
| | - Takaomi C Saido
- Laboratory for Proteolytic Neuroscience; RIKEN Brain Science Institute; Saitama Japan
| | - Majid H. Mohajerani
- Canadian Center for Behavioural Neuroscience; University of Lethbridge, Lethbridge Alberta Canada
| | - Robert J. McDonald
- Canadian Center for Behavioural Neuroscience; University of Lethbridge, Lethbridge Alberta Canada
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25
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Richetto J, Polesel M, Weber-Stadlbauer U. Effects of light and dark phase testing on the investigation of behavioural paradigms in mice: Relevance for behavioural neuroscience. Pharmacol Biochem Behav 2018; 178:19-29. [PMID: 29782942 DOI: 10.1016/j.pbb.2018.05.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 05/07/2018] [Accepted: 05/18/2018] [Indexed: 01/08/2023]
Abstract
Different timing and light phases are critical factors in behavioural neuroscience, which can greatly affect the experimental outcomes of the performed tests. Despite the fact that time of testing is one of the most common factors that varies across behavioural laboratories, knowledge about the consequences of testing time on behavioural readouts is limited. Thus, in this study we systematically assessed the effect of this factor on the readout of a variety of elementary and recurrent behavioural paradigms in C57Bl/6 mice. Furthermore, we investigated potential neuronal correlates of this phenomenon by analysing how testing time influences the expression pattern of genes relevant for neuronal activation functions and the control of brain circadian rhythms. We show that animals tested in the light phase display reduced social approach behaviour and sensorimotor gating and increased locomotor activity, whereas anxiety-related behaviour and working memory are not affected. In addition, animals tested in the light phase also exhibit increased locomotor response to systemic amphetamine treatment, which is paralleled by alterations in the expression patterns of tyrosine hydroxylase (TH) and dopamine transporter (DAT) in the Nucleus Accumbens (NAc) and/or Midbrain (Mid). Lastly, we observed that neuronal activation, indexed by the gene expression levels of cFos, was increased in the NAc and Mid of animals tested during the light phase. Our data thus suggest that daily alterations in gene expression in mesolimbic brain structures might be involved in the different behavioural responses of mice tested in the light- versus the dark-phase. At the same time, our study adds further weight to the notion that the specific timing of testing can indeed strongly affect the readout of a given test. As comparison and reproducibility of findings is pivotal in science, experimental protocols should be clarified in detail to allow appropriate data comparison across different laboratories.
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Affiliation(s)
- Juliet Richetto
- Institute of Pharmacology and Toxicology, University of Zurich-Vetsuisse, Zurich, Switzerland.
| | | | - Ulrike Weber-Stadlbauer
- Institute of Pharmacology and Toxicology, University of Zurich-Vetsuisse, Zurich, Switzerland
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26
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Clocking In Time to Gate Memory Processes: The Circadian Clock Is Part of the Ins and Outs of Memory. Neural Plast 2018; 2018:6238989. [PMID: 29849561 PMCID: PMC5925033 DOI: 10.1155/2018/6238989] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 01/22/2018] [Accepted: 02/05/2018] [Indexed: 01/11/2023] Open
Abstract
Learning, memory consolidation, and retrieval are processes known to be modulated by the circadian (circa: about; dies: day) system. The circadian regulation of memory performance is evolutionarily conserved, independent of the type and complexity of the learning paradigm tested, and not specific to crepuscular, nocturnal, or diurnal organisms. In mammals, long-term memory (LTM) formation is tightly coupled to de novo gene expression of plasticity-related proteins and posttranslational modifications and relies on intact cAMP/protein kinase A (PKA)/protein kinase C (PKC)/mitogen-activated protein kinase (MAPK)/cyclic adenosine monophosphate response element-binding protein (CREB) signaling. These memory-essential signaling components cycle rhythmically in the hippocampus across the day and night and are clearly molded by an intricate interplay between the circadian system and memory. Important components of the circadian timing mechanism and its plasticity are members of the Period clock gene family (Per1, Per2). Interestingly, Per1 is rhythmically expressed in mouse hippocampus. Observations suggest important and largely unexplored roles of the clock gene protein PER1 in synaptic plasticity and in the daytime-dependent modulation of learning and memory. Here, we review the latest findings on the role of the clock gene Period 1 (Per1) as a candidate molecular and mechanistic blueprint for gating the daytime dependency of memory processing.
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27
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Chi-Castañeda D, Ortega A. Glial Cells in the Genesis and Regulation of Circadian Rhythms. Front Physiol 2018; 9:88. [PMID: 29483880 PMCID: PMC5816069 DOI: 10.3389/fphys.2018.00088] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 01/26/2018] [Indexed: 12/26/2022] Open
Abstract
Circadian rhythms are biological oscillations with a period of ~24 h. These rhythms are orchestrated by a circadian timekeeper in the suprachiasmatic nucleus of the hypothalamus, the circadian "master clock," which exactly adjusts clock outputs to solar time via photic synchronization. At the molecular level, circadian rhythms are generated by the interaction of positive and negative feedback loops of transcriptional and translational processes of the so-called "clock genes." A large number of clock genes encode numerous proteins that regulate their own transcription and that of other genes, collectively known as "clock-controlled genes." In addition to the sleep/wake cycle, many cellular processes are regulated by circadian rhythms, including synaptic plasticity in which an exquisite interplay between neurons and glial cells takes place. In particular, there is compelling evidence suggesting that glial cells participate in and regulate synaptic plasticity in a circadian fashion, possibly representing the missing cellular and physiological link between circadian rhythms with learning and cognition processes. Here we review recent studies in support of this hypothesis, focusing on the interplay between glial cells, synaptic plasticity, and circadian rhythmogenesis.
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Affiliation(s)
- Donají Chi-Castañeda
- Laboratorio de Neurotoxicología, Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de Mexico, Mexico.,Soluciones para un México Verde S.A. de C.V., Ciudad de Mexico, Mexico
| | - Arturo Ortega
- Laboratorio de Neurotoxicología, Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de Mexico, Mexico
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28
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Fisk AS, Tam SKE, Brown LA, Vyazovskiy VV, Bannerman DM, Peirson SN. Light and Cognition: Roles for Circadian Rhythms, Sleep, and Arousal. Front Neurol 2018; 9:56. [PMID: 29479335 PMCID: PMC5811463 DOI: 10.3389/fneur.2018.00056] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 01/22/2018] [Indexed: 01/12/2023] Open
Abstract
Light exerts a wide range of effects on mammalian physiology and behavior. As well as synchronizing circadian rhythms to the external environment, light has been shown to modulate autonomic and neuroendocrine responses as well as regulating sleep and influencing cognitive processes such as attention, arousal, and performance. The last two decades have seen major advances in our understanding of the retinal photoreceptors that mediate these non-image forming responses to light, as well as the neural pathways and molecular mechanisms by which circadian rhythms are generated and entrained to the external light/dark (LD) cycle. By contrast, our understanding of the mechanisms by which lighting influences cognitive processes is more equivocal. The effects of light on different cognitive processes are complex. As well as the direct effects of light on alertness, indirect effects may also occur due to disrupted circadian entrainment. Despite the widespread use of disrupted LD cycles to study the role circadian rhythms on cognition, the different experimental protocols used have subtly different effects on circadian function which are not always comparable. Moreover, these protocols will also disrupt sleep and alter physiological arousal, both of which are known to modulate cognition. Studies have used different assays that are dependent on different cognitive and sensory processes, which may also contribute to their variable findings. Here, we propose that studies addressing the effects of different lighting conditions on cognitive processes must also account for their effects on circadian rhythms, sleep, and arousal if we are to fully understand the physiological basis of these responses.
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Affiliation(s)
- Angus S Fisk
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom
| | - Shu K E Tam
- Department of Experimental Psychology, University of Oxford, Oxford, United Kingdom
| | - Laurence A Brown
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom
| | - Vladyslav V Vyazovskiy
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, United Kingdom
| | - David M Bannerman
- Department of Experimental Psychology, University of Oxford, Oxford, United Kingdom
| | - Stuart N Peirson
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom
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29
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Recording Field Potentials and Synaptic Plasticity From Freely Behaving Rodents. HANDBOOK OF BEHAVIORAL NEUROSCIENCE 2018. [DOI: 10.1016/b978-0-12-812028-6.00001-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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30
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Albeit nocturnal, rats subjected to traumatic brain injury do not differ in neurobehavioral performance whether tested during the day or night. Neurosci Lett 2017; 665:212-216. [PMID: 29229396 DOI: 10.1016/j.neulet.2017.12.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 12/06/2017] [Accepted: 12/07/2017] [Indexed: 01/06/2023]
Abstract
Behavioral assessments in rats are overwhelmingly conducted during the day, albeit that is when they are least active. This incongruity may preclude optimal performance. Hence, the goal of this study was to determine if differences in neurobehavior exist in traumatic brain injured (TBI) rats when assessed during the day vs. night. The hypothesis was that the night group would perform better than the day group on all behavioral tasks. Anesthetized adult male rats received either a cortical impact or sham injury and then were randomly assigned to either Day (1:00-3:00p.m.) or Night (7:30-9:30p.m.) testing. Motor function (beam-balance/walk) was conducted on post-operative days 1-5 and cognitive performance (spatial learning) was assessed on days 14-18. Corticosterone (CORT) levels were quantified at 24h and 21days after TBI. No significant differences were revealed between the TBI rats tested during the Day vs. Night for motor or cognition (p's<0.05). CORT levels were higher in the Night-tested TBI and sham groups at 24h (p<0.05), but returned to baseline and were no longer different by day 21 (p>0.05), suggesting an initial, but transient, stress response that did not affect neurobehavioral outcome. These data suggest that the time rats are tested has no noticeable impact on their performance, which does not support the hypothesis. The finding validates the interpretations from numerous studies conducted when rats were tested during the day vs. their natural active period.
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Abstract
The small GTPase Ras is a universal eukaryotic cytoplasmic membrane-anchored protein, which regulates diverse downstream signal transduction pathways that play an important role in the proper functioning of neurons. Ras activity is a central regulator of structural and functional synaptic plasticity in the adult nervous system, where it channels neuronal responses to various extracellular cues allowing the organism to adapt to complex environmental stimuli. The suprachiasmatic nucleus (SCN) is the principle pacemaker of the circadian clock, and the circadian and photic regulation of Ras activity in the SCN is an important modulator of the clockwork. We have generated transgenic mouse expressing constitutively active V12-H-Ras selectively in neurons via a synapsin I promoter (synRas mice), which serves as a suitable model to study the role of neuronal Ras signaling. Modulation of Ras activity affects ERK1,2/CREB signaling and glycogen synthase kinase-3 beta expression in the SCN, which in turn modify the photoentrainment of the clock and the fine tuning the circadian period length. The main focus of this review is to offer an overview of the function of Ras signaling in the circadian rhythm and its potential role in learning and memory consolidation.
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Affiliation(s)
- Tsvetan Serchov
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | - Rolf Heumann
- Biochemistry II, Molecular Neurobiochemistry, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Bochum, Germany
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32
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Shimizu K, Kobayashi Y, Nakatsuji E, Yamazaki M, Shimba S, Sakimura K, Fukada Y. SCOP/PHLPP1β mediates circadian regulation of long-term recognition memory. Nat Commun 2016; 7:12926. [PMID: 27686624 PMCID: PMC5056436 DOI: 10.1038/ncomms12926] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2015] [Accepted: 08/16/2016] [Indexed: 01/07/2023] Open
Abstract
Learning and memory depend on the time of day in various organisms, but it is not clear whether and how the circadian clock regulates memory performance. Here we show that consolidation of long-term recognition memory is a circadian-regulated process, which is blunted by disruption of the hippocampal clock. We focused on SCOP, a key molecule regulating hippocampus-dependent long-term memory for objects. The amounts of SCOP and its binding partner K-Ras in the hippocampal membrane rafts exhibit robust circadian changes, and SCOP knockdown in the hippocampal CA1 impairs long-term memory at night. Circadian changes in stimulus-dependent activation of ERK in the hippocampal neurons are dependent on the SCOP levels in the membrane rafts, while Scop knockout abrogates the activation rhythm. We conclude that long-term memory formation is regulated by the circadian clock through SCOP dynamics in the membrane rafts of the hippocampal CA1. Learning and memory are subject to circadian variation, though the molecular mechanisms behind this are unclear. Here, the authors show SCOP, a regulator of hippocampal memory, undergoes circadian changes in CA1 membrane raft dynamics and contributes to time-dependent changes in long-term memory.
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Affiliation(s)
- Kimiko Shimizu
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Yodai Kobayashi
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Erika Nakatsuji
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Maya Yamazaki
- Department of Cellular Neurobiology, Brain Research Institute, Niigata University, Niigata 951-8585, Japan
| | - Shigeki Shimba
- Department of Health Science, School of Pharmacology, Nihon University, Chiba 274-8555, Japan
| | - Kenji Sakimura
- Department of Cellular Neurobiology, Brain Research Institute, Niigata University, Niigata 951-8585, Japan
| | - Yoshitaka Fukada
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
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Price KH, Dziema H, Aten S, Loeser J, Norona FE, Hoyt K, Obrietan K. Modulation of learning and memory by the targeted deletion of the circadian clock gene Bmal1 in forebrain circuits. Behav Brain Res 2016; 308:222-35. [PMID: 27091299 PMCID: PMC5344043 DOI: 10.1016/j.bbr.2016.04.027] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 03/27/2016] [Accepted: 04/14/2016] [Indexed: 02/06/2023]
Abstract
A large body of literature has shown that the disruption of circadian clock timing has profound effects on mood, memory and complex thinking. Central to this time keeping process is the master circadian pacemaker located within the suprachiasmatic nucleus (SCN). Of note, within the central nervous system, clock timing is not exclusive to the SCN, but rather, ancillary oscillatory capacity has been detected in a wide range of cell types and brain regions, including forebrain circuits that underlie complex cognitive processes. These observations raise questions about the hierarchical and functional relationship between the SCN and forebrain oscillators, and, relatedly, about the underlying clock-gated synaptic circuitry that modulates cognition. Here, we utilized a clock knockout strategy in which the essential circadian timing gene Bmal1 was selectively deleted from excitatory forebrain neurons, whilst the SCN clock remained intact, to test the role of forebrain clock timing in learning, memory, anxiety, and behavioral despair. With this model system, we observed numerous effects on hippocampus-dependent measures of cognition. Mice lacking forebrain Bmal1 exhibited deficits in both acquisition and recall on the Barnes maze. Notably, loss of forebrain Bmal1 abrogated time-of-day dependent novel object location memory. However, the loss of Bmal1 did not alter performance on the elevated plus maze, open field assay, and tail suspension test, indicating that this phenotype specifically impairs cognition but not affect. Together, these data suggest that forebrain clock timing plays a critical role in shaping the efficiency of learning and memory retrieval over the circadian day.
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Affiliation(s)
- Kaiden H Price
- Department of Neuroscience, Ohio State University, Columbus, OH, USA
| | - Heather Dziema
- Department of Neuroscience, Ohio State University, Columbus, OH, USA
| | - Sydney Aten
- Department of Neuroscience, Ohio State University, Columbus, OH, USA
| | - Jacob Loeser
- Department of Neuroscience, Ohio State University, Columbus, OH, USA
| | - Frances E Norona
- Department of Neuroscience, Ohio State University, Columbus, OH, USA
| | - Kari Hoyt
- Division of Pharmacology, Ohio State University, Columbus, OH, USA
| | - Karl Obrietan
- Department of Neuroscience, Ohio State University, Columbus, OH, USA.
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Behavioral Phenotype of Fmr1 Knock-Out Mice during Active Phase in an Altered Light/Dark Cycle. eNeuro 2016; 3:eN-NWR-0035-16. [PMID: 27294193 PMCID: PMC4901146 DOI: 10.1523/eneuro.0035-16.2016] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 03/14/2016] [Accepted: 03/26/2016] [Indexed: 12/14/2022] Open
Abstract
Fragile X syndrome (FXS) is the most commonly inherited form of intellectual disability and is a disorder that is also highly associated with autism. FXS occurs as a result of an expanded CGG repeat sequence leading to transcriptional silencing. In an animal model of FXS in which Fmr1 is knocked out (Fmr1 KO), many physical, physiological, and behavioral characteristics of the human disease are recapitulated. Prior characterization of the mouse model was conducted during the day, the inactive phase of the circadian cycle. Circadian rhythms are an important contributor to behavior and may play a role in the study of disease phenotype. Moreover, changes in the parameters of circadian rhythm are known to occur in FXS animal models. We conducted an investigation of key behavioral phenotypes in Fmr1 KO mice during their active phase. We report that phase did not alter the Fmr1 KO phenotype in open field activity, anxiety, and learning and memory. There was a slight effect of phase on social behavior as measured by time in chamber, but not by time spent sniffing. Our data strengthen the existing data characterizing the phenotype of Fmr1 KO mice, indicating that it is independent of circadian phase.
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35
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Miguel MAL, Menna-Barreto L. Immunomodulation by classical conditioning in NZB/W (F1) mice: Lifespan and diurnal variation. Sleep Sci 2016; 9:40-6. [PMID: 27226820 PMCID: PMC4867937 DOI: 10.1016/j.slsci.2015.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 11/15/2015] [Accepted: 12/09/2015] [Indexed: 11/09/2022] Open
Abstract
Systemic Lupus Eritematosus (SLE) is a systemic inflammatory disease often treated with the agent cyclophosphamide (CY), known by provoking important adverse reactions to the organism. Ader and Cohen have demonstrated an alternative way of administrating this agent based on pavlovian conditioning, in order to reduce the aggression caused by CY. Considering the influence of the temporal organization on learning and memory processes, the purpose of this study was to understand the temporal aspects involved in the conditioned immunomodulation. In a search for circadian modulation, we selected NZB/W (F1) female mice, a strain that spontaneously develop SLE. Divided into two major groups, the animals were submitted, in different phases of day, to a classical conditioning immunomodulation protocol, consisting in weekly parings of saccharin solution and CY injections. The success of the paradigm was evaluated by comparing lifespan among the groups. Simultaneously, it was monitored the water intake behavior, in order to correlate the stability of two rhythmic parameters, amplitude and spectral power density of the 24-h rhythm, with the progression of SLE. Our results indicate that mice could benefit from the conditioning task performed either in the light phase or in the dark phase of the LD cycle, as expressed by an increased lifespan. Concerning the rhythmic parameters, there was evidence of association between the rhythmic stability and the evolution of SLE, demonstrated by the maintenance of healthy levels of amplitude and spectral potency of the 24-h rhythm in animals exposed to the conditioning paradigm.
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Affiliation(s)
- Mario André Leocadio Miguel
- Departamento de Fisiologia, Universidade Federal do Rio Grande do Norte, Avenida Salgado Filho, S/N, 59078-970, Brazil
| | - Luiz Menna-Barreto
- Escola de Artes, Ciências e Humanidades, Universidade de São Paulo, Rua Arlindo Betio, 1000, 03828-000, Brazil
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Krishnan HC, Lyons LC. Synchrony and desynchrony in circadian clocks: impacts on learning and memory. ACTA ACUST UNITED AC 2015; 22:426-37. [PMID: 26286653 PMCID: PMC4561405 DOI: 10.1101/lm.038877.115] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 06/29/2015] [Indexed: 12/11/2022]
Abstract
Circadian clocks evolved under conditions of environmental variation, primarily alternating light dark cycles, to enable organisms to anticipate daily environmental events and coordinate metabolic, physiological, and behavioral activities. However, modern lifestyle and advances in technology have increased the percentage of individuals working in phases misaligned with natural circadian activity rhythms. Endogenous circadian oscillators modulate alertness, the acquisition of learning, memory formation, and the recall of memory with examples of circadian modulation of memory observed across phyla from invertebrates to humans. Cognitive performance and memory are significantly diminished when occurring out of phase with natural circadian rhythms. Disruptions in circadian regulation can lead to impairment in the formation of memories and manifestation of other cognitive deficits. This review explores the types of interactions through which the circadian clock modulates cognition, highlights recent progress in identifying mechanistic interactions between the circadian system and the processes involved in memory formation, and outlines methods used to remediate circadian perturbations and reinforce circadian adaptation.
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Affiliation(s)
- Harini C Krishnan
- Department of Biological Science, Program in Neuroscience, Florida State University, Tallahassee, Florida 32306, USA
| | - Lisa C Lyons
- Department of Biological Science, Program in Neuroscience, Florida State University, Tallahassee, Florida 32306, USA
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Martin-Fairey CA, Nunez AA. Circadian modulation of memory and plasticity gene products in a diurnal species. Brain Res 2014; 1581:30-9. [PMID: 25063362 PMCID: PMC4157103 DOI: 10.1016/j.brainres.2014.07.020] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 07/11/2014] [Accepted: 07/14/2014] [Indexed: 01/30/2023]
Abstract
Cognition is modulated by circadian rhythms, in both nocturnal and diurnal species. Rhythms of clock gene expression occur in brain regions that are outside the master circadian oscillator of the suprachiasmatic nucleus and that control cognitive functions, perhaps by regulating the expression neural-plasticity genes such as brain derived neurotrophic factor (BDNF) and its high affinity receptor, tyrosine kinase B (TrkB). In the diurnal grass rat (Arvicanthis niloticus), the hippocampus shows rhythms of clock genes that are 180° out of phase with those of nocturnal rodents. Here, we examined the hypothesis that this reversal extends to the optimal phase for learning a hippocampal-dependent task and to the phase of hippocampal rhythms in BDNF/TrkB expression. We used the Morris water maze (MWM) to test for time of day differences in reference memory and monitored daily patterns of hippocampal BDNF/TrkB expression in grass rats. Grass rats showed superior long-term retention of the MWM, when the training and testing occurred during the day as compared to the night, at a time when nocturnal laboratory rats show superior retention; acquisition of the MWM was not affected by time of day. BDNF/TrkB expression was rhythmic in the hippocampus of grass rats, and the phase of the rhythms was reversed compared to that of nocturnal rodents. Our findings provide correlational evidence for the claim that the circadian regulation of cognition may involve rhythms of BDNF/TrkB expression in the hippocampus and that their phase may contribute to species differences in the optimal phase for learning.
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Affiliation(s)
| | - Antonio A Nunez
- Department of Psychology, Michigan State University, East Lansing, MI 48824, USA; Neuroscience Program, Michigan State University, East Lansing, MI 48824, USA.
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38
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Lee JY, Harvey AG. Memory for therapy in bipolar disorder and comorbid insomnia. J Consult Clin Psychol 2014; 83:92-102. [PMID: 25222800 DOI: 10.1037/a0037911] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE To examine the extent to which patients recall the contents of therapy from 1 session to the next and to determine whether recall is associated with treatment outcome. METHOD Thirty interepisode individuals with bipolar disorder and comorbid insomnia (ages 21-62 years, 56.7% women, 56.7% Caucasian) participated in a randomized controlled trial of psychotherapies. Patients received either cognitive behavior therapy for insomnia (CBTI-BP; n = 17) or psychoeducation (PE; n = 13). At the beginning of each weekly session, patients freely recalled as many therapy points (i.e., distinct ideas, principles, and experiences) as they could from their previous session. After each session, therapists recorded a list of all therapy points delivered. Treatment outcome was measured via the Insomnia Severity Index (ISI), Pittsburgh Sleep Quality Index, Patient-Reported Outcome Measurement Info System-Sleep, and Quality of Life-Sleep (QOL-Sleep), administered pre- and posttreatment, and treatment evaluation questions administered posttreatment. RESULTS Patients recalled 19.6% to 36.9% of therapy points listed by therapists. Raw numbers of therapy points recalled were positively correlated with reductions in ISI scores and gains in QOL-Sleep and with most treatment evaluation questions. Percentages of therapy points recalled were positively correlated with gains in QOL-Sleep but with no other sleep outcome measures or any of the treatment evaluation questions. Patients in CBTI-BP recalled more therapy points than did those in PE but did not differ in the percentages of points recalled. CONCLUSIONS Memory for therapy is poor. The amount of content recalled is positively associated with treatment outcome. Enhancing memory for therapy might play a key role in improving treatment outcome.
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Affiliation(s)
- Jason Y Lee
- Department of Psychology, University of California
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Rakai BD, Chrusch MJ, Spanswick SC, Dyck RH, Antle MC. Survival of adult generated hippocampal neurons is altered in circadian arrhythmic mice. PLoS One 2014; 9:e99527. [PMID: 24941219 PMCID: PMC4062413 DOI: 10.1371/journal.pone.0099527] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 05/15/2014] [Indexed: 01/25/2023] Open
Abstract
The subgranular zone of the hippocampal formation gives rise to new neurons that populate the dentate gyrus throughout life. Cells in the hippocampus exhibit rhythmic clock gene expression and the circadian clock is known to regulate the cycle of cell division in other areas of the body. These facts suggest that the circadian clock may regulate adult neurogenesis in the hippocampus as well. In the present study, neurogenesis in the hippocampal subgranular zone was examined in arrhythmic Bmal1 knockout (-KO) mice and their rhythmic heterozygous and wildtype littermates. Proliferation and survival of newly generated subgranular zone cells were examined using bromodeoxyuridine labelling, while pyknosis (a measure of cell death) and hippocampal volume were examined in cresyl violet stained sections. There was no significant difference in cellular proliferation between any of the groups, yet survival of proliferating cells, 6 weeks after the bromodeoxyuridine injection, was significantly greater in the BMAL1-KO animals. The number of pyknotic cells was significantly decreased in Bmal1-KO animals, yet hippocampal volume remained the same across genotypes. These findings suggest that while a functional circadian clock is not necessary for normal proliferation of neuronal precursor cells, the normal pruning of newly generated neurons in the hippocampus may require a functional circadian clock.
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Affiliation(s)
- Brooke D. Rakai
- Department of Psychology, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
| | - Michael J. Chrusch
- Department of Psychology, University of Calgary, Calgary, Alberta, Canada
- Department of Neuroscience, University of Calgary, Calgary, Alberta, Canada
| | - Simon C. Spanswick
- Department of Psychology, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
| | - Richard H. Dyck
- Department of Psychology, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
| | - Michael C. Antle
- Department of Psychology, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Pharmacology & Therapeutics, University of Calgary, Calgary, Alberta, Canada
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Smarr BL, Jennings KJ, Driscoll JR, Kriegsfeld LJ. A time to remember: the role of circadian clocks in learning and memory. Behav Neurosci 2014; 128:283-303. [PMID: 24708297 PMCID: PMC4385793 DOI: 10.1037/a0035963] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The circadian system has pronounced influence on learning and memory, manifesting as marked changes in memory acquisition and recall across the day. From a mechanistic perspective, the majority of studies have investigated mammalian hippocampal-dependent learning and memory, as this system is highly tractable. The hippocampus plays a major role in learning and memory, and has the potential to integrate circadian information in many ways, including information from local, independent oscillators, and through circadian modulation of neurogenesis, synaptic remodeling, intracellular cascades, and epigenetic regulation of gene expression. These local processes are combined with input from other oscillatory systems to synergistically augment hippocampal rhythmic function. This overview presents an account of the current state of knowledge on circadian interactions with learning and memory circuitry and provides a framework for those interested in further exploring these interactions.
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Affiliation(s)
- Benjamin L. Smarr
- Department of Psychology, University of California, Berkeley, CA, 94720 USA
| | | | - Joseph R. Driscoll
- The Helen Wills Neuroscience Institute, University of California, Berkeley, CA, 94720 USA
| | - Lance J. Kriegsfeld
- Department of Psychology, University of California, Berkeley, CA, 94720 USA
- The Helen Wills Neuroscience Institute, University of California, Berkeley, CA, 94720 USA
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Chen J, Liang L, Zhan L, Zhou Y, Zheng L, Sun X, Gong J, Sui H, Jiang R, Zhang F, Zhang L. ZiBuPiYin recipe protects db/db mice from diabetes-associated cognitive decline through improving multiple pathological changes. PLoS One 2014; 9:e91680. [PMID: 24614172 PMCID: PMC3948870 DOI: 10.1371/journal.pone.0091680] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Accepted: 02/14/2014] [Indexed: 11/18/2022] Open
Abstract
Multiple organ systems, including the brain, which undergoes changes that may increase the risk of cognitive decline, are adversely affected by diabetes mellitus (DM). Here, we demonstrate that type 2 diabetes mellitus (T2DM) db/db mice exhibited hippocampus-dependent memory impairment, which might associate with a reduction in dendritic spine density in the pyramidal neurons of brain, Aβ1-42 deposition in the prefrontal cortex (PFC) and hippocampus, and a decreased expression of neurostructural proteins including microtubule-associated protein (MAP2), a marker of dendrites, and postsynaptic density 95 (PSD95), a marker of excitatory synapses. To investigate the effects of the ZiBuPiYin recipe (ZBPYR), a traditional Chinese medicine recipe, on diabetes-related cognitive decline (DACD), db/db mice received daily administration of ZBPYR over an experimental period of 6 weeks. We then confirmed that ZBPYR rescued learning and memory performance impairments, reversed dendritic spine loss, reduced Aβ1-42 deposition and restored the expression levels of MAP2 and PSD95. The present study also revealed that ZBPYR strengthened brain leptin and insulin signaling and inhibited GSK3β overactivity, which may be the potential mechanism or underlying targets of ZBPYR. These findings conclude that ZBPYR prevents DACD, most likely by improving dendritic spine density and attenuating brain leptin and insulin signaling pathway injury. Our findings provide further evidence for the effects of ZBPYR on DACD.
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Affiliation(s)
- Jing Chen
- The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Lina Liang
- College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Libin Zhan
- The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
- College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Yan Zhou
- The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Luping Zheng
- College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Xiaoxin Sun
- College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Jin Gong
- Anatomy department of Dalian Medical University, Dalian, Liaoning, China
| | - Hua Sui
- College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Rujiao Jiang
- College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Fuliang Zhang
- Public Health department of Dalian Medical University, Dalian, Liaoning, China
| | - Lin Zhang
- College (Institute) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
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Ikeno T, Weil ZM, Nelson RJ. Photoperiod affects the diurnal rhythm of hippocampal neuronal morphology of siberian hamsters. Chronobiol Int 2013; 30:1089-100. [DOI: 10.3109/07420528.2013.800090] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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43
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Protein phosphatase-dependent circadian regulation of intermediate-term associative memory. J Neurosci 2013; 33:4605-13. [PMID: 23467376 DOI: 10.1523/jneurosci.4534-12.2013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
The endogenous circadian clock is a principal factor modulating memory across species. Determining the processes through which the circadian clock modulates memory formation is a key issue in understanding and identifying mechanisms to improve memory. We used the marine mollusk Aplysia californica to investigate circadian modulation of intermediate-term memory (ITM) and the mechanisms through which the circadian clock phase specifically suppresses memory using the operant learning paradigm, learning that food is inedible. We found that ITM, a temporally and mechanistically distinct form of memory, is rhythmically expressed under light-dark and constant conditions when induced by either massed or spaced training. Strong circadian regulation of ITM occurs with memory exhibited only by animals trained during the early subjective day; no apparent memory is expressed when training occurs during the late subjective day or night. Given the necessity of multiple persistent kinase cascades for ITM, we investigated whether protein phosphatase activity affected circadian modulation. Inhibition of protein phosphatases 1 and 2A blocked ITM when animals were trained during the early (subjective) day while resulting in phase-specific memory rescue when animals were trained late in the subjective day and early night. In contrast, inhibition of calcineurin did not block ITM when animals were trained during the early day and permitted ITM when animals were trained during the late subjective day, early evening, and throughout the night. These results demonstrate that levels of protein phosphatase activity are critical regulators of ITM and one mechanism through which the circadian clock regulates memory formation.
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Ralph MR, Sam K, Rawashdeh OA, Cain SW, Ko CH. Memory for Time of Day (Time Memory) Is Encoded by a Circadian Oscillator and Is Distinct From Other Context Memories. Chronobiol Int 2013; 30:540-7. [DOI: 10.3109/07420528.2012.754449] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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45
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Aberrant light directly impairs mood and learning through melanopsin-expressing neurons. Nature 2012; 491:594-8. [PMID: 23151476 DOI: 10.1038/nature11673] [Citation(s) in RCA: 351] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Accepted: 10/11/2012] [Indexed: 11/09/2022]
Abstract
The daily solar cycle allows organisms to synchronize their circadian rhythms and sleep-wake cycles to the correct temporal niche. Changes in day-length, shift-work, and transmeridian travel lead to mood alterations and cognitive function deficits. Sleep deprivation and circadian disruption underlie mood and cognitive disorders associated with irregular light schedules. Whether irregular light schedules directly affect mood and cognitive functions in the context of normal sleep and circadian rhythms remains unclear. Here we show, using an aberrant light cycle that neither changes the amount and architecture of sleep nor causes changes in the circadian timing system, that light directly regulates mood-related behaviours and cognitive functions in mice. Animals exposed to the aberrant light cycle maintain daily corticosterone rhythms, but the overall levels of corticosterone are increased. Despite normal circadian and sleep structures, these animals show increased depression-like behaviours and impaired hippocampal long-term potentiation and learning. Administration of the antidepressant drugs fluoxetine or desipramine restores learning in mice exposed to the aberrant light cycle, suggesting that the mood deficit precedes the learning impairments. To determine the retinal circuits underlying this impairment of mood and learning, we examined the behavioural consequences of this light cycle in animals that lack intrinsically photosensitive retinal ganglion cells. In these animals, the aberrant light cycle does not impair mood and learning, despite the presence of the conventional retinal ganglion cells and the ability of these animals to detect light for image formation. These findings demonstrate the ability of light to influence cognitive and mood functions directly through intrinsically photosensitive retinal ganglion cells.
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Cain SW, Chalmers JA, Ralph MR. Circadian modulation of passive avoidance is not eliminated in arrhythmic hamsters with suprachiasmatic nucleus lesions. Behav Brain Res 2012; 230:288-90. [DOI: 10.1016/j.bbr.2012.02.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Revised: 02/08/2012] [Accepted: 02/09/2012] [Indexed: 11/17/2022]
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Golini RS, Delgado SM, Navigatore Fonzo LS, Ponce IT, Lacoste MG, Anzulovich AC. Daily patterns of clock and cognition-related factors are modified in the hippocampus of vitamin A-deficient rats. Hippocampus 2012; 22:1720-32. [PMID: 22434687 DOI: 10.1002/hipo.22007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/18/2011] [Indexed: 01/30/2023]
Abstract
The circadian expression of clock and clock-controlled cognition-related genes in the hippocampus would be essential to achieve an optimal daily cognitive performance. There is some evidence that retinoid nuclear receptors (RARs and RXRs) can regulate circadian gene expression in different tissues. In this study, Holtzman male rats from control and vitamin A-deficient groups were sacrificed throughout a 24-h period and hippocampus samples were isolated every 4 or 5 h. RARα and RXRβ expression level was quantified and daily expression patterns of clock BMAL1, PER1, RORα, and REVERB genes, RORα and REVERB proteins, as well as temporal expression of cognition-related RC3 and BDNF genes were determined in the hippocampus of the two groups of rats. Our results show significant daily variations of BMAL1, PER1, RORα, and REVERB genes, RORα and REVERB proteins and, consequently, daily oscillating expression of RC3 and BDNF genes in the rat hippocampus. Vitamin A deficiency reduced RXRβ mRNA level as well as the amplitude of PER1, REVERB gene, and REVERB protein rhythms, and phase-shifted the daily peaks of BMAL1 and RORα mRNA, RORα protein, and RC3 and BDNF mRNA levels. Thus, nutritional factors, such as vitamin A and its derivatives the retinoids, might modulate daily patterns of BDNF and RC3 expression in the hippocampus, and they could be essential to maintain an optimal daily performance at molecular level in this learning-and-memory-related brain area.
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Affiliation(s)
- Rebeca S Golini
- Laboratory of Chronobiology, Multidisciplinary Institute of Biological Research - San Luis, Argentina
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Gritton HJ, Kantorowski A, Sarter M, Lee TM. Bidirectional interactions between circadian entrainment and cognitive performance. Learn Mem 2012; 19:126-41. [PMID: 22383380 DOI: 10.1101/lm.023499.111] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Circadian rhythms influence a variety of physiological and behavioral processes; however, little is known about how circadian rhythms interact with the organisms' ability to acquire and retain information about their environment. These experiments tested whether rats trained outside their endogenous active period demonstrate the same rate of acquisition, daily performance, and remote memory ability as their nocturnally trained counterparts in tasks of sustained attention and spatial memory. Furthermore, we explored how daily task training influenced circadian patterns of activity. We found that rats demonstrate better acquisition and performance on an operant task requiring attentional effort when trained during the dark-phase. Time of day did not affect acquisition or performance on the Morris water maze; however, when animals were retested 2 wk after their last day of training, they showed better remote memory if training originally occurred during the dark-phase. Finally, attentional, but not spatial, task performance during the light-phase promotes a shift toward diurnality and the synchronization of activity to the time of daily training; this shift was most robust when the demands on the cognitive control of attention were highest. Our findings support a theory of bidirectional interactions between cognitive performance and circadian processes and are consistent with the view that the circadian abnormalities associated with shift-work, aging, and neuropsychiatric illnesses may contribute to the deleterious effects on cognition often present in these populations. Furthermore, these findings suggest that time of day should be an important consideration for a variety of cognitive tasks principally used in psychological and neuroscience research.
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Affiliation(s)
- Howard J Gritton
- Department of Psychology, University of Michigan, Ann Arbor, Michigan 48109-1043, USA
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Geng YQ, Li TT, Liu XY, Li ZH, Fu YC. SIRT1 and SIRT5 activity expression and behavioral responses to calorie restriction. J Cell Biochem 2011; 112:3755-61. [DOI: 10.1002/jcb.23315] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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50
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Frenkel L, Fernanda Ceriani M. Circadian Plasticity: From Structure to Behavior. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2011; 99:107-38. [DOI: 10.1016/b978-0-12-387003-2.00005-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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