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Cabrera Y, Koymans KJ, Poe GR, Kessels HW, Van Someren EJW, Wassing R. Overnight neuronal plasticity and adaptation to emotional distress. Nat Rev Neurosci 2024; 25:253-271. [PMID: 38443627 DOI: 10.1038/s41583-024-00799-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/01/2024] [Indexed: 03/07/2024]
Abstract
Expressions such as 'sleep on it' refer to the resolution of distressing experiences across a night of sound sleep. Sleep is an active state during which the brain reorganizes the synaptic connections that form memories. This Perspective proposes a model of how sleep modifies emotional memory traces. Sleep-dependent reorganization occurs through neurophysiological events in neurochemical contexts that determine the fates of synapses to grow, to survive or to be pruned. We discuss how low levels of acetylcholine during non-rapid eye movement sleep and low levels of noradrenaline during rapid eye movement sleep provide a unique window of opportunity for plasticity in neuronal representations of emotional memories that resolves the associated distress. We integrate sleep-facilitated adaptation over three levels: experience and behaviour, neuronal circuits, and synaptic events. The model generates testable hypotheses for how failed sleep-dependent adaptation to emotional distress is key to mental disorders, notably disorders of anxiety, depression and post-traumatic stress with the common aetiology of insomnia.
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Affiliation(s)
- Yesenia Cabrera
- Department of Integrative Biology and Physiology, Brain Research Institute, University of California Los Angeles, Los Angeles, CA, USA
| | - Karin J Koymans
- Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
| | - Gina R Poe
- Department of Integrative Biology and Physiology, Brain Research Institute, University of California Los Angeles, Los Angeles, CA, USA
| | - Helmut W Kessels
- Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
- Department of Synaptic Plasticity and Behaviour, Netherlands Institute for Neuroscience, An Institute of the Royal Netherlands Society for Arts and Sciences, Amsterdam, Netherlands
| | - Eus J W Van Someren
- Department of Sleep and Cognition, Netherlands Institute for Neuroscience, An Institute of the Royal Netherlands Society for Arts and Sciences, Amsterdam, Netherlands
- Department of Integrative Neurophysiology and Psychiatry, VU University, Amsterdam UMC, Amsterdam, Netherlands
- Center for Neurogenomics and Cognitive Research, VU University, Amsterdam UMC, Amsterdam, Netherlands
| | - Rick Wassing
- Sleep and Circadian Research, Woolcock Institute of Medical Research, Macquarie University, Sydney, New South Wales, Australia.
- School of Psychological Sciences, Faculty of Medicine Health and Human Sciences, Macquarie University, Sydney, New South Wales, Australia.
- Sydney Local Health District, Sydney, New South Wales, Australia.
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2
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Liao MH, Lin YK, Gau FY, Tseng CC, Wu DC, Hsu CY, Chung KH, Li RC, Hu CJ, Then CK, Shen SC. Antidepressant sertraline increases thioflavin-S and Congo red deposition in APPswe/PSEN1dE9 transgenic mice. Front Pharmacol 2024; 14:1260838. [PMID: 38259283 PMCID: PMC10800414 DOI: 10.3389/fphar.2023.1260838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 12/14/2023] [Indexed: 01/24/2024] Open
Abstract
Introduction: Depression is strongly associated with Alzheimer's disease (AD). Antidepressants are commonly used in patients before and after their diagnosis of AD. To date, the relationship between antidepressants and AD remains unclear. Methods: In our study, we administered sertraline or paroxetine to wild type (WT) and APPswe/PSEN1dE9 (APP/PSEN1) transgenic mouse models for up to 12 months. We quantified the drug concentrations using LC-MS/MS analysis and measured serum serotonin level using an ELISA assay. Additionally, we evaluated the amyloid burdens through thioflavin-S and Congo red stainings, and recognition memory using the novel object recognition test. Results: Our findings revealed that mice treated with paroxetine exhibited a significantly higher level of weight gain compared to the control group and increased mortality in APP/PSEN1 mice. After 12 months of antidepressant treatment, the sertraline level was measured at 289.8 ng/g for cerebellum, while the paroxetine level was 792.9 ng/g for cerebellum. Sertraline significantly increased thioflavin-S and Congo red depositions, along with gliosis, in both isocortex and hippocampus of APP/PSEN1 mice compared to the control group. Both antidepressants also led to a decreased recognition index in APP/PSEN1 mice. Conclusion: These findings suggest a potential role of sertraline in AD pathogenesis, emphasizing the need to reassess the use of these antidepressants in patients with AD.
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Affiliation(s)
- Ming-Hsuan Liao
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yen-Kuang Lin
- Graduate Institute of Athletics and Coaching Science, National Taiwan Sport University, Taoyuan, Taiwan
| | - Fong-Ying Gau
- School of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan
| | - Chun-Che Tseng
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Da-Chih Wu
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chu-Yuan Hsu
- School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei, Taiwan
| | - Kuo-Hsuan Chung
- Department of Psychiatry and Psychiatric Research Center, Taipei Medical University Hospital, Taipei, Taiwan
- Department of Psychiatry, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Rung-Chi Li
- Division of Allergy and Immunology, University of Virginia, Charlottesville, VA, United States
| | - Chaur-Jong Hu
- Department of Neurology, Shuang Ho Hospital, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chee Kin Then
- MRC Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, United Kingdom
- Department of Radiation Oncology, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
| | - Shing-Chuan Shen
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
- International Master/Ph.D. Program in Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Department of Dermatology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
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3
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Netherby-Winslow C, Thompson B, Lotta L, Gallagher M, Van Haute P, Yang R, Hott D, Hasan H, Bachmann K, Bautista J, Gerber S, Cory-Slechta DA, Janelsins M. Effects of mammary cancer and chemotherapy on neuroimmunological markers and memory function in a preclinical mouse model. Brain Behav Immun Health 2023; 34:100699. [PMID: 38058985 PMCID: PMC10695847 DOI: 10.1016/j.bbih.2023.100699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 10/26/2023] [Accepted: 10/28/2023] [Indexed: 12/08/2023] Open
Abstract
Treatment modalities for breast cancer, including cyclophosphamide chemotherapy, have been associated with the development of cognitive decline (CRCD), which is characterized by impairments in memory, concentration, attention, and executive functions. We and others have identified a link between inflammation and decreased cognitive performance in patients with breast cancer receiving chemotherapy. In order to better understand the inflammation-associated molecular changes within the brain related to tumor alone or in combination with chemotherapy, we orthotopically implanted mouse mammary tumors (E0771) into female C57BL/6 mice and administered clinically relevant doses of cyclophosphamide and doxorubicin intravenously at weekly intervals for four weeks. We measured serum cytokines and markers of neuroinflammation at 48 h and up to one month post-treatment and tested memory using a reward-based delayed spatial alternation paradigm. We found that breast tumors and chemotherapy altered systemic inflammation and neuroinflammation. We further found that the presence of tumor and chemotherapy led to a decline in memory over time at the longest delay, when memory was the most taxed, compared to shorter delay times. These findings in a clinically relevant mouse model shed light on possible biomarkers for CRCD and add to the growing evidence that anti-inflammatory strategies have the potential to mitigate cancer- or treatment-related side effects.
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Affiliation(s)
- Colleen Netherby-Winslow
- Department of Surgery, Division of Supportive Care in Cancer, University of Rochester, Rochester, NY, United States
| | - Bryan Thompson
- Department of Surgery, Division of Supportive Care in Cancer, University of Rochester, Rochester, NY, United States
| | - Louis Lotta
- Department of Surgery, Division of Supportive Care in Cancer, University of Rochester, Rochester, NY, United States
| | - Mark Gallagher
- Department of Surgery, Division of Supportive Care in Cancer, University of Rochester, Rochester, NY, United States
| | - Paige Van Haute
- Department of Surgery, Division of Supportive Care in Cancer, University of Rochester, Rochester, NY, United States
| | - Rachel Yang
- Department of Surgery, Division of Supportive Care in Cancer, University of Rochester, Rochester, NY, United States
| | - Devin Hott
- Department of Surgery, Division of Supportive Care in Cancer, University of Rochester, Rochester, NY, United States
| | - Hamza Hasan
- Department of Surgery, Division of Supportive Care in Cancer, University of Rochester, Rochester, NY, United States
| | - Katherine Bachmann
- Department of Environmental Medicine, University of Rochester, Rochester, NY, United States
| | - Javier Bautista
- Department of Surgery, Division of Supportive Care in Cancer, University of Rochester, Rochester, NY, United States
| | - Scott Gerber
- Department of Surgery, Division of Surgical Oncology, Rochester, NY, United States
| | | | - Michelle Janelsins
- Department of Surgery, Division of Supportive Care in Cancer, University of Rochester, Rochester, NY, United States
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4
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Yang L, Zhang Q, Wu XQ, Qiu XY, Fei F, Lai NX, Zheng YY, Zhang MD, Zhang QY, Wang Y, Wang F, Xu CL, Ruan YP, Wang Y, Chen Z. Chemogenetic inhibition of subicular seizure-activated neurons alleviates cognitive deficit in male mouse epilepsy model. Acta Pharmacol Sin 2023; 44:2376-2387. [PMID: 37488426 PMCID: PMC10692337 DOI: 10.1038/s41401-023-01129-z] [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: 04/07/2023] [Accepted: 06/28/2023] [Indexed: 07/26/2023] Open
Abstract
Cognitive deficit is a common comorbidity in temporal lobe epilepsy (TLE) and is not well controlled by current therapeutics. How epileptic seizure affects cognitive performance remains largely unclear. In this study we investigated the role of subicular seizure-activated neurons in cognitive impairment in TLE. A bipolar electrode was implanted into hippocampal CA3 in male mice for kindling stimulation and EEG recording; a special promoter with enhanced synaptic activity-responsive element (E-SARE) was used to label seizure-activated neurons in the subiculum; the activity of subicular seizure-activated neurons was manipulated using chemogenetic approach; cognitive function was assessed in object location memory (OLM) and novel object recognition (NOR) tasks. We showed that chemogenetic inhibition of subicular seizure-activated neurons (mainly CaMKIIα+ glutamatergic neurons) alleviated seizure generalization and improved cognitive performance, but inhibition of seizure-activated GABAergic interneurons had no effect on seizure and cognition. For comparison, inhibition of the whole subicular CaMKIIα+ neuron impaired cognitive function in naïve mice in basal condition. Notably, chemogenetic inhibition of subicular seizure-activated neurons enhanced the recruitment of cognition-responsive c-fos+ neurons via increasing neural excitability during cognition tasks. Our results demonstrate that subicular seizure-activated neurons contribute to cognitive impairment in TLE, suggesting seizure-activated neurons as the potential therapeutic target to alleviate cognitive impairment in TLE.
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Affiliation(s)
- Lin Yang
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Qi Zhang
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Xue-Qing Wu
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Xiao-Yun Qiu
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Fan Fei
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
- Zhejiang Rehabilitation Medical Center, The Third Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310013, China
| | - Nan-Xi Lai
- Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, School of Medicine, Zhejiang University, Hangzhou, 310058, China
| | - Yu-Yi Zheng
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Meng-di Zhang
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Qing-Yang Zhang
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Yu Wang
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Fei Wang
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Ceng-Lin Xu
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Ye-Ping Ruan
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Yi Wang
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China.
- Zhejiang Rehabilitation Medical Center, The Third Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310013, China.
- Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, School of Medicine, Zhejiang University, Hangzhou, 310058, China.
| | - Zhong Chen
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China.
- Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, School of Medicine, Zhejiang University, Hangzhou, 310058, China.
- Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China.
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Fmr1-KO mice failure to detect object novelty associates with a post-test decrease of structural and synaptic plasticity upstream of the hippocampus. Sci Rep 2023; 13:755. [PMID: 36641518 PMCID: PMC9840621 DOI: 10.1038/s41598-023-27991-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 01/11/2023] [Indexed: 01/15/2023] Open
Abstract
Mice with deletion of the FMR1 gene show episodic memory impairments and exhibit dendritic spines and synaptic plasticity defects prevalently identified in non-training conditions. Based on evidence that synaptic changes associated with normal or abnormal memory emerge when mice are cognitively challenged, here we examine whether, and how, fragile entorhinal and hippocampal synapses are remodeled when mice succeed or fail to learn. We trained Fmr1 knockout (KO) and wild-type C57BL/6J (WT) mice in the novel object recognition (NOR) paradigm with 1 h or 24 h training-to-test intervals and then assessed whether varying the time between the presentation of similar and different objects modulates NOR performance and plasticity along the entorhinal cortex-hippocampus axis. At the 1 h-interval, KO mice failed to discriminate the novel object, showed a collapse of spines in the lateral entorhinal cortex (LEC), and of long-term potentiation (LTP) in the lateral perforant path (LPP), but a normal increase in hippocampal spines. At the 24 h, they exhibited intact NOR performance, typical LEC and hippocampal spines, and exaggerated LPP-LTP. Our findings reveal that the inability of mice to detect object novelty primarily stands in their impediment to elaborate, and convey to the hippocampus, sensory/perceptive object representations.
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6
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Robinson JC, Brandon MP. Skipping ahead: A circuit for representing the past, present, and future. eLife 2021; 10:e68795. [PMID: 34647521 PMCID: PMC8516414 DOI: 10.7554/elife.68795] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 09/28/2021] [Indexed: 01/02/2023] Open
Abstract
Envisioning the future is intuitively linked to our ability to remember the past. Within the memory system, substantial work has demonstrated the involvement of the prefrontal cortex and the hippocampus in representing the past and present. Recent data shows that both the prefrontal cortex and the hippocampus encode future trajectories, which are segregated in time by alternating cycles of the theta rhythm. Here, we discuss how information is temporally organized by these brain regions supported by the medial septum, nucleus reuniens, and parahippocampal regions. Finally, we highlight a brain circuit that we predict is essential for the temporal segregation of future scenarios.
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Affiliation(s)
- Jennifer C Robinson
- Department of Psychological and Brain Sciences, Rajen Kilachand Center for Integrated Life Sciences and Engineering, Boston UniversityBostonUnited States
| | - Mark P Brandon
- Department of Psychiatry, Douglas Hospital Research Centre, McGill UniversityMontrealCanada
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7
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Brault V, Nguyen TL, Flores-Gutiérrez J, Iacono G, Birling MC, Lalanne V, Meziane H, Manousopoulou A, Pavlovic G, Lindner L, Selloum M, Sorg T, Yu E, Garbis SD, Hérault Y. Dyrk1a gene dosage in glutamatergic neurons has key effects in cognitive deficits observed in mouse models of MRD7 and Down syndrome. PLoS Genet 2021; 17:e1009777. [PMID: 34587162 PMCID: PMC8480849 DOI: 10.1371/journal.pgen.1009777] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 08/16/2021] [Indexed: 12/03/2022] Open
Abstract
Perturbation of the excitation/inhibition (E/I) balance leads to neurodevelopmental diseases including to autism spectrum disorders, intellectual disability, and epilepsy. Loss-of-function mutations in the DYRK1A gene, located on human chromosome 21 (Hsa21,) lead to an intellectual disability syndrome associated with microcephaly, epilepsy, and autistic troubles. Overexpression of DYRK1A, on the other hand, has been linked with learning and memory defects observed in people with Down syndrome (DS). Dyrk1a is expressed in both glutamatergic and GABAergic neurons, but its impact on each neuronal population has not yet been elucidated. Here we investigated the impact of Dyrk1a gene copy number variation in glutamatergic neurons using a conditional knockout allele of Dyrk1a crossed with the Tg(Camk2-Cre)4Gsc transgenic mouse. We explored this genetic modification in homozygotes, heterozygotes and combined with the Dp(16Lipi-Zbtb21)1Yey trisomic mouse model to unravel the consequence of Dyrk1a dosage from 0 to 3, to understand its role in normal physiology, and in MRD7 and DS. Overall, Dyrk1a dosage in postnatal glutamatergic neurons did not impact locomotor activity, working memory or epileptic susceptibility, but revealed that Dyrk1a is involved in long-term explicit memory. Molecular analyses pointed at a deregulation of transcriptional activity through immediate early genes and a role of DYRK1A at the glutamatergic post-synapse by deregulating and interacting with key post-synaptic proteins implicated in mechanism leading to long-term enhanced synaptic plasticity. Altogether, our work gives important information to understand the action of DYRK1A inhibitors and have a better therapeutic approach. The Dual Specificity Tyrosine Phosphorylation Regulated Kinase 1A, DYRK1A, drives cognitive alterations with increased dose in Down syndrome (DS) or with reduced dose in DYRK1A-related intellectual disability syndromes (ORPHA:268261; ORPHA:464311) also known as mental retardation, autosomal dominant disease 7 (MRD7; OMIM #614104). Here we report that specific and complete loss of Dyrk1a in glutamatergic neurons induced a range of specific cognitive phenotypes and alter the expression of genes involved in neurotransmission in the hippocampus. We further explored the consequences of Dyrk1a dosage in glutamatergic neurons on the cognitive phenotypes observed respectively in MRD7 and DS mouse models and we found specific roles in long-term explicit memory with no impact on motor activity, short-term working memory, and susceptibility to epilepsy. Then we demonstrated that DYRK1A is a component of the glutamatergic post-synapse and interacts with several component such as NR2B and PSD95. Altogether our work describes a new role of DYRK1A at the glutamatergic synapse that must be considered to understand the consequence of treatment targeting DYRK1A in disease.
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Affiliation(s)
- Véronique Brault
- Université de Strasbourg, CNRS, INSERM, Institut de Génétique et de Biologie Moléculaire et Cellulaire, IGBMC, Illkirch, France
| | - Thu Lan Nguyen
- Université de Strasbourg, CNRS, INSERM, Institut de Génétique et de Biologie Moléculaire et Cellulaire, IGBMC, Illkirch, France
| | - Javier Flores-Gutiérrez
- Université de Strasbourg, CNRS, INSERM, Institut de Génétique et de Biologie Moléculaire et Cellulaire, IGBMC, Illkirch, France
| | - Giovanni Iacono
- Department of Molecular Biology, Radboud Institute for Molecular Life Sciences, Radboud University, Nijmegen, the Netherlands
| | - Marie-Christine Birling
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris, Illkirch, France
| | - Valérie Lalanne
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris, Illkirch, France
| | - Hamid Meziane
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris, Illkirch, France
| | - Antigoni Manousopoulou
- Institute for Life Sciences, University of Southampton, School of Medicine, Southampton, United Kingdom
| | - Guillaume Pavlovic
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris, Illkirch, France
| | - Loïc Lindner
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris, Illkirch, France
| | - Mohammed Selloum
- Université de Strasbourg, CNRS, INSERM, Institut de Génétique et de Biologie Moléculaire et Cellulaire, IGBMC, Illkirch, France
| | - Tania Sorg
- Université de Strasbourg, CNRS, INSERM, Institut de Génétique et de Biologie Moléculaire et Cellulaire, IGBMC, Illkirch, France
| | - Eugene Yu
- The Children’s Guild Foundation Down Syndrome Research Program, Genetics and Genomics Program and Department of Cancer Genetics and Genomics, Roswell Park Comprehensive Cancer Center, Buffalo, New York, United States of America
- Genetics, Genomics and Bioinformatics Program, State University of New York At Buffalo, Buffalo, New York, United States of America
| | - Spiros D. Garbis
- Institute for Life Sciences, University of Southampton, School of Medicine, Southampton, United Kingdom
| | - Yann Hérault
- Université de Strasbourg, CNRS, INSERM, Institut de Génétique et de Biologie Moléculaire et Cellulaire, IGBMC, Illkirch, France
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris, Illkirch, France
- * E-mail:
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8
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Frank D, Kafkas A. Expectation-driven novelty effects in episodic memory. Neurobiol Learn Mem 2021; 183:107466. [PMID: 34048914 DOI: 10.1016/j.nlm.2021.107466] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 04/22/2021] [Accepted: 05/23/2021] [Indexed: 12/14/2022]
Abstract
Novel and unexpected stimuli are often prioritised in memory, given their inherent salience. Nevertheless, not all forms of novelty show such an enhancement effect. Here, we discuss the role expectation plays in modulating the way novelty affects memory processes, circuits, and subsequent performance. We first review independent effects of expectation on memory, and then consider how different types of novelty are characterised by expectation. We argue that different types of novelty defined by expectation implicate differential neurotransmission in memory formation brain regions and may also result in the creation of different types of memory. Contextual novelty, which is unexpected by definition, is often associated with better recollection, supported by dopaminergic-hippocampal interactions. On the other hand, expected stimulus novelty is supported by engagement of medial temporal cortices, as well as the hippocampus, through cholinergic modulation. Furthermore, when expected stimulus novelty results in enhanced memory, it is predominantly driven by familiarity. The literature reviewed here highlights the complexity of novelty-sensitive memory systems, the distinction between types of novelty, and how they are differentially affected by expectancy.
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Affiliation(s)
- Darya Frank
- Laboratory for Clinical Neuroscience, Centre for Biomedical Technology, Universidad Politécnica de Madrid, Spain; Division of Neuroscience and Experimental Psychology, School of Biological Sciences, The University of Manchester, UK.
| | - Alex Kafkas
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, The University of Manchester, UK.
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9
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Ameen-Ali KE, Sivakumaran MH, Eacott MJ, O'Connor AR, Ainge JA, Easton A. Perirhinal cortex and the recognition of relative familiarity. Neurobiol Learn Mem 2021; 182:107439. [PMID: 33862223 DOI: 10.1016/j.nlm.2021.107439] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 03/10/2021] [Accepted: 04/09/2021] [Indexed: 01/11/2023]
Abstract
Spontaneous object recognition (SOR) is a widely used task of recognition memory in rodents which relies on their propensity to explore novel (or relatively novel) objects. Network models typically define perirhinal cortex as a region required for recognition of previously seen objects largely based on findings that lesions or inactivations of this area produce SOR deficits. However, relatively little is understood about the relationship between the activity of cells in the perirhinal cortex that signal novelty and familiarity and the behavioural responses of animals in the SOR task. Previous studies have used objects that are either highly familiar or absolutely novel, but everyday memory is for objects that sit on a spectrum of familiarity which includes objects that have been seen only a few times, or objects that are similar to objects which have been previously experienced. We present two studies that explore cellular activity (through c-fos imaging) within perirhinal cortex of rats performing SOR where the familiarity of objects has been manipulated. Despite robust recognition memory performance, we show no significant changes in perirhinal activity related to the level of familiarity of the objects. Reasons for this lack of familiarity-related modulation in perirhinal cortex activity are discussed. The current findings support emerging evidence that perirhinal responses to novelty are complex and that task demands are critical to the involvement of perirhinal cortex in the control of object recognition memory.
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Affiliation(s)
- Kamar E Ameen-Ali
- Institute of Neuroscience and Psychology, University of Glasgow, G51 4TF, UK; Department of Psychology, Durham University, DH1 3LE, UK
| | | | - Madeline J Eacott
- Department of Psychology, University of Essex, Colchester CO4 3SQ, UK
| | - Akira R O'Connor
- School of Psychology & Neuroscience, University of St Andrews, KY16 9JP, UK
| | - James A Ainge
- School of Psychology & Neuroscience, University of St Andrews, KY16 9JP, UK
| | - Alexander Easton
- Department of Psychology, Durham University, DH1 3LE, UK; Centre for Learning and Memory Processes, Durham University, DH1 3LE, UK
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10
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Verma MK, Goel RN, Bokare AM, Dandekar MP, Koul S, Desai S, Tota S, Singh N, Nigade PB, Patil VB, Modi D, Mehta M, Gundu J, Walunj SS, Karche NP, Sinha N, Kamboj RK, Palle VP. LL-00066471, a novel positive allosteric modulator of α7 nicotinic acetylcholine receptor ameliorates cognitive and sensorimotor gating deficits in animal models: Discovery and preclinical characterization. Eur J Pharmacol 2021; 891:173685. [PMID: 33127363 DOI: 10.1016/j.ejphar.2020.173685] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 10/21/2020] [Accepted: 10/26/2020] [Indexed: 01/20/2023]
Abstract
α7 nicotinic acetylcholine receptor (α7 nAChR) is an extensively validated target for several neurological and psychiatric conditions namely, dementia and schizophrenia, owing to its vital roles in cognition and sensorimotor gating. Positive allosteric modulation (PAM) of α7 nAChR represents an innovative approach to amplify endogenous cholinergic signaling in a temporally restricted manner in learning and memory centers of brain. α7 nAChR PAMs are anticipated to side-step burgeoning issues observed with several clinical-stage orthosteric α7 nAChR agonists, related to selectivity, tolerance/tachyphylaxis, thus providing a novel dimension in therapeutic strategy and pharmacology of α7 nAChR ion-channel. Here we describe a novel α7 nAChR PAM, LL-00066471, which potently amplified agonist-induced Ca2+ fluxes in neuronal IMR-32 neuroblastoma cells in a α-bungarotoxin (α-BTX) sensitive manner. LL-00066471 showed excellent oral bioavailability across species (mouse, rat and dog), low clearance and good brain penetration (B/P ratio > 1). In vivo, LL-00066471 robustly attenuated cognitive deficits in both procognitive and antiamnesic paradigms of short-term episodic and recognition memory in novel object recognition task (NORT) and social recognition task (SRT), respectively. Additionally, LL-00066471 mitigated apomorphine-induced sensorimotor gating deficits in acoustic startle reflex (ASR) and enhanced antipsychotic efficacy of olanzapine in conditioned avoidance response (CAR) task. Further, LL-00066471 corrected redox-imbalances and reduced cortico-striatal infarcts in stroke model. These finding together suggest that LL-00066471 has potential to symptomatically alleviate cognitive deficits associated with dementias, attenuate sensorimotor gating deficits in schizophrenia and correct redox-imbalances in cerebrovascular disorders. Therefore, LL-00066471 presents potential for management of cognitive impairments associated with neurological and psychiatric conditions.
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MESH Headings
- Animals
- Behavior, Animal/drug effects
- Brain/drug effects
- Brain/metabolism
- Brain/physiopathology
- Cell Line, Tumor
- Cholinergic Agents/pharmacokinetics
- Cholinergic Agents/pharmacology
- Cognition/drug effects
- Cognitive Dysfunction/metabolism
- Cognitive Dysfunction/physiopathology
- Cognitive Dysfunction/prevention & control
- Cognitive Dysfunction/psychology
- Disease Models, Animal
- Dogs
- Exploratory Behavior/drug effects
- Gait Disorders, Neurologic/metabolism
- Gait Disorders, Neurologic/physiopathology
- Gait Disorders, Neurologic/prevention & control
- Gait Disorders, Neurologic/psychology
- Ischemic Stroke/drug therapy
- Ischemic Stroke/metabolism
- Ischemic Stroke/physiopathology
- Male
- Mice, Inbred BALB C
- Open Field Test/drug effects
- Oxidative Stress/drug effects
- Rats, Sprague-Dawley
- Rats, Wistar
- Reflex, Startle/drug effects
- Sensory Gating/drug effects
- Signal Transduction
- Social Behavior
- alpha7 Nicotinic Acetylcholine Receptor/drug effects
- alpha7 Nicotinic Acetylcholine Receptor/metabolism
- Mice
- Rats
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Affiliation(s)
- Mahip K Verma
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India.
| | - Rajan N Goel
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Anand M Bokare
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Manoj P Dandekar
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Sarita Koul
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Sagar Desai
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Santoshkumar Tota
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Nilendra Singh
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Prashant B Nigade
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Vinod B Patil
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Dipak Modi
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Maneesh Mehta
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Jayasagar Gundu
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Sameer S Walunj
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Navnath P Karche
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Neelima Sinha
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Rajender K Kamboj
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
| | - Venkata P Palle
- Department of Pharmacology, Novel Drug Discovery and Development, Lupin Limited, Lupin Research Park, Pune, Maharashtra, 412115, India
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11
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Sethumadhavan N, Hoang TH, Strauch C, Manahan-Vaughan D. Involvement of the Postrhinal and Perirhinal Cortices in Microscale and Macroscale Visuospatial Information Encoding. Front Behav Neurosci 2020; 14:556645. [PMID: 33192363 PMCID: PMC7584114 DOI: 10.3389/fnbeh.2020.556645] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 08/28/2020] [Indexed: 11/29/2022] Open
Abstract
Whereas the postrhinal cortex (POR) is a critical center for the integration of egocentric and allocentric spatial information, the perirhinal cortex (PRC) plays an important role in the encoding of objects that supports spatial learning. The POR and PRC send afferents to the hippocampus, a structure that builds complex associative memories from the spatial experience. Hippocampal encoding of item-place experience is accompanied by the nuclear expression of immediate early gene (IEGs). Subfields of the Cornus ammonius and subregions of the hippocampus exhibit differentiated and distinct encoding responses, depending on whether the spatial location and relationships of large highly visible items (macroscale encoding) or small partially concealed items (microscale encoding), is learned. But to what extent the PRC and POR support hippocampal processing of different kinds of item-place representations is unclear. Using fluorescence in situ hybridization (FISH), we examined the effect of macroscale (overt, landmark) and microscale (subtle, discrete) item-place learning on the nuclear expression of the IEG, Arc. We observed an increase in Arc mRNA in the caudal part of PRC area 35 and the caudal part of the POR after macroscale, but not microscale item-place learning. The caudal part of PRC area 36, the rostral and middle parts of PRC areas 35 and 36, as well as the middle part of the POR responded to neither type of item. These results suggest that macroscale items may contain a strong identity component that is processed by specific compartments of the PRC and POR. In contrast small, microscale items are not encoded by the POR or PRC, indicating that item dimensions may play a role in the involvement of these structures in item processing.
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Affiliation(s)
- Nithya Sethumadhavan
- Department of Neurophysiology, Medical Faculty, Ruhr University Bochum, Bochum, Germany.,International Graduate School of Neuroscience, Ruhr University Bochum, Bochum, Germany
| | - Thu-Huong Hoang
- Department of Neurophysiology, Medical Faculty, Ruhr University Bochum, Bochum, Germany.,International Graduate School of Neuroscience, Ruhr University Bochum, Bochum, Germany
| | - Christina Strauch
- Department of Neurophysiology, Medical Faculty, Ruhr University Bochum, Bochum, Germany
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12
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Dolleman-van der Weel MJ, Witter MP. The thalamic midline nucleus reuniens: potential relevance for schizophrenia and epilepsy. Neurosci Biobehav Rev 2020; 119:422-439. [PMID: 33031816 DOI: 10.1016/j.neubiorev.2020.09.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 09/03/2020] [Accepted: 09/28/2020] [Indexed: 01/08/2023]
Abstract
Anatomical, electrophysiological and behavioral studies in rodents have shown that the thalamic midline nucleus reuniens (RE) is a crucial link in the communication between hippocampal formation (HIP, i.e., CA1, subiculum) and medial prefrontal cortex (mPFC), important structures for cognitive and executive functions. A common feature in neurodevelopmental and neurodegenerative brain diseases is a dysfunctional connectivity/communication between HIP and mPFC, and disturbances in the cognitive domain. Therefore, it is assumed that aberrant functioning of RE may contribute to behavioral/cognitive impairments in brain diseases characterized by cortico-thalamo-hippocampal circuit dysfunctions. In the human brain the connections of RE are largely unknown. Yet, recent studies have found important similarities in the functional connectivity of HIP-mPFC-RE in humans and rodents, making cautious extrapolating experimental findings from animal models to humans justifiable. The focus of this review is on a potential involvement of RE in schizophrenia and epilepsy.
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Affiliation(s)
- M J Dolleman-van der Weel
- Kavli Institute for Systems Neuroscience and Centre for Neural Computation, NTNU Norwegian University of Science and Technology, Trondheim NO-7491, Norway.
| | - M P Witter
- Kavli Institute for Systems Neuroscience and Centre for Neural Computation, NTNU Norwegian University of Science and Technology, Trondheim NO-7491, Norway.
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13
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Aggleton JP, Nelson AJD. Distributed interactive brain circuits for object-in-place memory: A place for time? Brain Neurosci Adv 2020; 4:2398212820933471. [PMID: 32954003 PMCID: PMC7479857 DOI: 10.1177/2398212820933471] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 05/15/2020] [Indexed: 12/23/2022] Open
Abstract
Rodents will spontaneously learn the location of an individual object, an
ability captured by the object-in-place test. This review considers
the network of structures supporting this behavioural test, as well as
some potential confounds that may affect interpretation. A
hierarchical approach is adopted, as we first consider those brain
regions necessary for two simpler, ‘precursor’ tests (object
recognition and object location). It is evident that performing the
object-in-place test requires an array of areas additional to those
required for object recognition or object location. These additional
areas include the rodent medial prefrontal cortex and two thalamic
nuclei (nucleus reuniens and the medial dorsal nucleus), both densely
interconnected with prefrontal areas. Consequently, despite the need
for object and location information to be integrated for the
object-in-place test, for example, via the hippocampus, other
contributions are necessary. These contributions stem from how
object-in-place is a test of associative recognition, as none of the
individual elements in the test phase are novel. Parallels between the
structures required for object-in-place and for recency
discriminations, along with a re-examination of the demands of the
object-in-place test, signal the integration of temporal information
within what is usually regarded as a spatial-object test.
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Affiliation(s)
- John P Aggleton
- School of Psychology, Cardiff University, Cardiff, Wales, UK
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14
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Role of HMGB1 in an Animal Model of Vascular Cognitive Impairment Induced by Chronic Cerebral Hypoperfusion. Int J Mol Sci 2020; 21:ijms21062176. [PMID: 32245271 PMCID: PMC7139598 DOI: 10.3390/ijms21062176] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 03/20/2020] [Indexed: 01/10/2023] Open
Abstract
The pathophysiology of vascular cognitive impairment (VCI) is associated with chronic cerebral hypoperfusion (CCH). Increased high-mobility group box protein 1 (HMGB1), a nonhistone protein involved in injury and inflammation, has been established in the acute phase of CCH. However, the role of HMGB1 in the chronic phase of CCH remains unclear. We developed a novel animal model of CCH with a modified bilateral common carotid artery occlusion (BCCAO) in C57BL/6 mice. Cerebral blood flow (CBF) reduction, the expression of HMGB1 and its proinflammatory cytokines (tumor necrosis factor-alpha [TNF-α], interleukin [IL]-1β, and IL-6), and brain pathology were assessed. Furthermore, we evaluated the effect of HMGB1 suppression through bilateral intrahippocampus injection with the CRISPR/Cas9 knockout plasmid. Three months after CCH induction, CBF decreased to 30–50% with significant cognitive decline in BCCAO mice. The 7T-aMRI showed hippocampal atrophy, but amyloid positron imaging tomography showed nonsignificant amyloid-beta accumulation. Increased levels of HMGB1, TNF-α, IL-1β, and IL-6 were observed 3 months after BCCAO. HMGB1 suppression with CRISPR/Cas9 knockout plasmid restored TNF-α, IL-1β, and IL-6 and attenuated hippocampal atrophy and cognitive decline. We believe that HMGB1 plays a pivotal role in CCH-induced VCI pathophysiology and can be a potential therapeutic target of VCI.
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15
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Trigiani LJ, Lacalle-Aurioles M, Bourourou M, Li L, Greenhalgh AD, Zarruk JG, David S, Fehlings MG, Hamel E. Benefits of physical exercise on cognition and glial white matter pathology in a mouse model of vascular cognitive impairment and dementia. Glia 2020; 68:1925-1940. [PMID: 32154952 DOI: 10.1002/glia.23815] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 02/06/2020] [Accepted: 02/24/2020] [Indexed: 12/16/2022]
Abstract
White matter (WM) pathology is a clinically predictive feature of vascular cognitive impairment and dementia (VCID). Mice overexpressing transforming growth factor-β1 (TGF) with an underlying cerebrovascular pathology when fed a high cholesterol diet (HCD) develop cognitive deficits (VCID mice) that we recently found could be prevented by physical exercise (EX). Here, we further investigated cognitive and WM pathology in VCID mice and examined the cellular substrates of the protective effects of moderate aerobic EX focusing on WM alterations. Six groups were studied: Wild-type (WT) and TGF mice (n = 20-24/group) fed standard lab chow or a 2% HCD, with two HCD-fed groups given concurrent access to running wheels. HCD had a significant negative effect in TGF mice that was prevented by EX on working and object recognition memory, the latter also altered in WT HCD mice. Whisker-evoked increases in cerebral blood flow (CBF) were reduced in HCD-fed mice, deficits that were countered by EX, and baseline WM CBF was similarly affected. VCID mice displayed WM functional deficits characterized by lower compound action potential amplitude not found in EX groups. Moreover, there was an increased number of collapsing capillaries, galectin-3-expressing microglial cells, as well as a reduced number of oligodendrocytes in the WM of VCID mice; all of which were prevented by EX. Our findings indicate that a compromised cerebral circulation precedes reduced WM vascularization, enhanced WM inflammation and impaired oligodendrogenesis that all likely account for the increased susceptibility to memory impairments in VCID mice, which can be prevented by EX. MAIN POINTS: A compromised cerebral circulation increases susceptibility to anatomical and functional white matter changes that develop alongside cognitive deficits when challenged with a high cholesterol diet; preventable by a translational regimen of exercise.
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Affiliation(s)
- Lianne J Trigiani
- Laboratory of Cerebrovascular Research, Montreal Neurological Institute, McGill University, Montréal, Quebec, Canada
| | - María Lacalle-Aurioles
- Laboratory of Cerebrovascular Research, Montreal Neurological Institute, McGill University, Montréal, Quebec, Canada
| | - Miled Bourourou
- Laboratory of Cerebrovascular Research, Montreal Neurological Institute, McGill University, Montréal, Quebec, Canada
| | - Lijun Li
- Division of Genetics and Development, Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Andrew D Greenhalgh
- Center for Research in Neuroscience, The Research Institute of the McGill University Health Center, Montreal, Quebec, Canada
| | - Juan G Zarruk
- Center for Research in Neuroscience, The Research Institute of the McGill University Health Center, Montreal, Quebec, Canada
| | - Samuel David
- Center for Research in Neuroscience, The Research Institute of the McGill University Health Center, Montreal, Quebec, Canada
| | - Michael G Fehlings
- Division of Genetics and Development, Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Edith Hamel
- Laboratory of Cerebrovascular Research, Montreal Neurological Institute, McGill University, Montréal, Quebec, Canada
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16
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Hamlett ED, Ledreux A, Gilmore A, Vazey EM, Aston-Jones G, Boger HA, Paredes D, Granholm ACE. Inhibitory designer receptors aggravate memory loss in a mouse model of down syndrome. Neurobiol Dis 2019; 134:104616. [PMID: 31678403 DOI: 10.1016/j.nbd.2019.104616] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 08/06/2019] [Accepted: 09/17/2019] [Indexed: 12/20/2022] Open
Abstract
The pontine nucleus locus coeruleus (LC) is the primary source of noradrenergic (NE) projections to the brain and is important for working memory, attention, and cognitive flexibility. Individuals with Down syndrome (DS) develop Alzheimer's disease (AD) with high penetrance and often exhibit working memory deficits coupled with degeneration of LC-NE neurons early in the progression of AD pathology. Designer receptors exclusively activated by designer drugs (DREADDs) are chemogenetic tools that allow targeted manipulation of discrete neuronal populations in the brain without the confounds of off-target effects. We utilized male Ts65Dn mice (a mouse model for DS), and male normosomic (NS) controls to examine the effects of inhibitory DREADDs delivered via an AAV vector under translational control of the synthetic PRSx8, dopamine β hydroxylase (DβH) promoter. This chemogenetic tool allowed LC inhibition upon administration of the inert DREADD ligand, clozapine-N-oxide (CNO). DREADD-mediated LC inhibition impaired performance in a novel object recognition task and reversal learning in a spatial task. DREADD-mediated LC inhibition gave rise to an elevation of α-adrenoreceptors both in NS and in Ts65Dn mice. Further, microglial markers showed that the inhibitory DREADD stimulation led to increased microglial activation in the hippocampus in Ts65Dn but not in NS mice. These findings strongly suggest that LC signaling is important for intact memory and learning in Ts65Dn mice and disruption of these neurons leads to increased inflammation and dysregulation of adrenergic receptors.
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Affiliation(s)
- Eric D Hamlett
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC 29425, USA.
| | - Aurélie Ledreux
- Knoebel Institute for Healthy Aging, University of Denver, Denver, CO 80208, USA
| | - Anah Gilmore
- Knoebel Institute for Healthy Aging, University of Denver, Denver, CO 80208, USA
| | - Elena M Vazey
- Department of Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Gary Aston-Jones
- Rutgers Brain Health Institute, Rutgers University, Piscataway, NJ 08854, USA
| | - Heather A Boger
- Department of Neurosciences, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Daniel Paredes
- Knoebel Institute for Healthy Aging, University of Denver, Denver, CO 80208, USA
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17
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Doostdar N, Kim E, Grayson B, Harte MK, Neill JC, Vernon AC. Global brain volume reductions in a sub-chronic phencyclidine animal model for schizophrenia and their relationship to recognition memory. J Psychopharmacol 2019; 33:1274-1287. [PMID: 31060435 DOI: 10.1177/0269881119844196] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Cognitive deficits and structural brain changes co-occur in patients with schizophrenia. Improving our understanding of the relationship between these is important to develop improved therapeutic strategies. Back-translation of these findings into rodent models for schizophrenia offers a potential means to achieve this goal. AIMS The purpose of this study was to determine the extent of structural brain changes and how these relate to cognitive behaviour in a sub-chronic phencyclidine rat model. METHODS Performance in the novel object recognition task was examined in female Lister Hooded rats at one and six weeks after sub-chronic phencyclidine (2 mg/kg intra-peritoneal, n=15) and saline controls (1 ml/kg intra-peritoneal, n=15). Locomotor activity following acute phencyclidine challenge was also measured. Brain volume changes were assessed in the same animals using ex vivo structural magnetic resonance imaging and computational neuroanatomical analysis at six weeks. RESULTS Female sub-chronic phencyclidine-treated Lister Hooded rats spent significantly less time exploring novel objects (p<0.05) at both time-points and had significantly greater locomotor activity response to an acute phencyclidine challenge (p<0.01) at 3-4 weeks of washout. At six weeks, sub-chronic phencyclidine-treated Lister Hooded rats displayed significant global brain volume reductions (p<0.05; q<0.05), without apparent regional specificity. Relative volumes of the perirhinal cortex however were positively correlated with novel object exploration time only in sub-chronic phencyclidine rats at this time-point. CONCLUSION A sustained sub-chronic phencyclidine-induced cognitive deficit in novel object recognition is accompanied by global brain volume reductions in female Lister Hooded rats. The relative volumes of the perirhinal cortex however are positively correlated with novel object exploration, indicating some functional relevance.
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Affiliation(s)
- Nazanin Doostdar
- Division of Pharmacy and Optometry, School of Health Sciences, Faculty of Medicine, Biology and Health, University of Manchester, Manchester, UK
| | - Eugene Kim
- Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Ben Grayson
- Division of Pharmacy and Optometry, School of Health Sciences, Faculty of Medicine, Biology and Health, University of Manchester, Manchester, UK
| | - Michael K Harte
- Division of Pharmacy and Optometry, School of Health Sciences, Faculty of Medicine, Biology and Health, University of Manchester, Manchester, UK
| | - Joanna C Neill
- Division of Pharmacy and Optometry, School of Health Sciences, Faculty of Medicine, Biology and Health, University of Manchester, Manchester, UK
| | - Anthony C Vernon
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
- MRC Centre for Neurodevelopmental Disorders, King's College London, London, UK
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18
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Zhao W, Gao X, Qiu S, Gao B, Gao S, Zhang X, Kang D, Han W, Dai P, Yuan Y. A subunit of V-ATPases, ATP6V1B2, underlies the pathology of intellectual disability. EBioMedicine 2019; 45:408-421. [PMID: 31257146 PMCID: PMC6642280 DOI: 10.1016/j.ebiom.2019.06.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 06/06/2019] [Accepted: 06/18/2019] [Indexed: 01/21/2023] Open
Abstract
Background Dominant deafness-onychodystrophy (DDOD) syndrome is a rare disorder mainly characterized by severe deafness, onychodystrophy and brachydactyly. We previously identified c.1516C > T (p.Arg506X) in ATP6V1B2 as cause of DDOD syndrome, accounting for all cases of this genetic disorder. Clinical follow-up of DDOD syndrome patients with cochlear implantation revealed the language rehabilitation was unsatisfactory although the implanted cochlea worked well, which indicates there might be learning and memory problems in DDOD syndrome patients. However, the underlying mechanisms were unknown. Methods atp6v1b2 knockdown zebrafish and Atp6v1b2 c.1516C > T knockin mice were constructed to explore the phenotypes and related mechanism. In mutant mice, auditory brainstem response test and cochlear morphology analysis were performed to evaluate the auditory function. Behavioral tests were used to investigate various behavioral and cognitive domains. Resting-state functional magnetic resonance imaging was used to evaluate functional connectivity in the mouse brain. Immunofluorescence, Western blot, and co-immunoprecipitation were performed to examine the expression and interactions between the subunits of V-ATPases. Findings atp6v1b2 knockdown zebrafish showed developmental defects in multiple organs and systems. However, Atp6v1b2 c.1516C > T knockin mice displayed obvious cognitive defects but normal hearing and cochlear morphology. Impaired hippocampal CA1 region and weaker interaction between the V1E and B2 subunits in Atp6v1b2Arg506X//Arg506X mice were observed. Interpretation Our study extends the phenotypic range of DDOD syndrome. The impaired hippocampal CA1 region may be the pathological basis of the behavioral defects in mutant mice. The molecular mechanism underlying V-ATPases dysfunction involves a weak interaction between subunits, although the assembly of V-ATPases can still take place.
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Affiliation(s)
- Weihao Zhao
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA General Hospital, 28# Fuxing Road, Beijing 100853, China; Department of Otolaryngology General Hospital of Tibet Military Region, Lhasa 850007, China
| | - Xue Gao
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA General Hospital, 28# Fuxing Road, Beijing 100853, China; Department of Otolaryngology, PLA Rocket Force Characteristic Medical Center, 16# XinWai Da Jie, Beijing 100088, China
| | - Shiwei Qiu
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA General Hospital, 28# Fuxing Road, Beijing 100853, China
| | - Bo Gao
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA General Hospital, 28# Fuxing Road, Beijing 100853, China
| | - Song Gao
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA General Hospital, 28# Fuxing Road, Beijing 100853, China
| | - Xin Zhang
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA General Hospital, 28# Fuxing Road, Beijing 100853, China
| | - Dongyang Kang
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA General Hospital, 28# Fuxing Road, Beijing 100853, China
| | - Weiju Han
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA General Hospital, 28# Fuxing Road, Beijing 100853, China.
| | - Pu Dai
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA General Hospital, 28# Fuxing Road, Beijing 100853, China.
| | - Yongyi Yuan
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA General Hospital, 28# Fuxing Road, Beijing 100853, China.
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19
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Walker AK, Chang A, Ziegler AI, Dhillon HM, Vardy JL, Sloan EK. Low dose aspirin blocks breast cancer-induced cognitive impairment in mice. PLoS One 2018; 13:e0208593. [PMID: 30532184 PMCID: PMC6287899 DOI: 10.1371/journal.pone.0208593] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Accepted: 11/20/2018] [Indexed: 12/28/2022] Open
Abstract
Cancer patients with non-central nervous system tumors often suffer from cognitive impairment. While chemotherapy has long been attributed as the cause of these memory, learning and concentration difficulties, we recently observed cognitive impairment in cancer patients prior to treatment. This suggests the cancer alone may be sufficient to induce cognitive impairment, however the mechanisms are unknown. Here, we show that we can experimentally replicate the clinical phenomenon of cancer-associated cognitive impairment and we identify inflammation as a causal mechanism. We demonstrate that a peripheral tumor is sufficient to induce memory loss. Using an othotopic mouse model of breast cancer, we found that mice with 4T1.2 or EO771 mammary tumors had significantly poorer memory than mice without tumors. Memory impairment was independent of cancer-induced sickness behavior, which was only observed during the later stage of cancer progression in mice with high metastatic burden. Tumor-secreted factors were sufficient to induce memory impairment and pro-inflammatory cytokines were elevated in the plasma of tumor-bearing mice. Oral treatment with low-dose aspirin completely blocked tumor-induced memory impairment without affecting tumor-induced sickness or tumor growth, demonstrating a causal role for inflammation in cognitive impairment. These findings suggest that anti-inflammatories may be a safe and readily translatable strategy that could be used to prevent cancer-associated cognitive impairment in patients.
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Affiliation(s)
- Adam K. Walker
- Drug Discovery Biology Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
- Neuroscience Research Australia, Randwick, New South Wales, Australia
- School of Psychiatry, University of New South Wales, Randwick, New South Wales, Australia
- Division of Cancer Surgery, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia
- * E-mail:
| | - Aeson Chang
- Drug Discovery Biology Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Alexandra I. Ziegler
- Drug Discovery Biology Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Haryana M. Dhillon
- Centre for Medical Psychology & Evidence-based Decision-Making, School of Psychology, Faculty of Science, University of Sydney, Camperdown, New South Wales, Australia
| | - Janette L. Vardy
- Concord Clinical School, Sydney Medical School, University of Sydney, Camperdown, New South Wales, Australia
- Concord Cancer Centre, Concord Repatriation General Hospital, Concord, New South Wales, Australia
| | - Erica K. Sloan
- Drug Discovery Biology Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
- Division of Cancer Surgery, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia
- Cousins Center for PNI, UCLA Semel Institute, Jonsson Comprehensive Cancer Center, and UCLA AIDS Institute, University of California Los Angeles, Los Angeles, California, United states of America
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20
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Wang H, Xie K, Xie L, Li X, Li M, Lyu C, Chen H, Chen Y, Liu X, Tsien J, Liu T. Functional Brain Connectivity Revealed by Sparse Coding of Large-Scale Local Field Potential Dynamics. Brain Topogr 2018; 32:255-270. [PMID: 30341589 DOI: 10.1007/s10548-018-0682-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 10/08/2018] [Indexed: 10/28/2022]
Abstract
Exploration of brain dynamics patterns has attracted increasing attention due to its fundamental significance in understanding the working mechanism of the brain. However, due to the lack of effective modeling methods, how the simultaneously recorded LFP can inform us about the brain dynamics remains a general challenge. In this paper, we propose a novel sparse coding based method to investigate brain dynamics of freely-behaving mice from the perspective of functional connectivity, using super-long local field potential (LFP) recordings from 13 distinct regions of the mouse brain. Compared with surrogate datasets, six and four reproducible common functional connectivities were discovered to represent the space of brain dynamics in the frequency bands of alpha and theta respectively. Modeled by a finite state machine, temporal transition framework of functional connectivities was inferred for each frequency band, and evident preference was discovered. Our results offer a novel perspective for analyzing neural recording data at such high temporal resolution and recording length, as common functional connectivities and their transition framework discovered in this work reveal the nature of the brain dynamics in freely behaving mice.
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Affiliation(s)
- Han Wang
- College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, China
| | - Kun Xie
- Brain and Behavior Discovery Institute, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Li Xie
- The State Key Laboratory of Industrial Control Technology, Zhejiang University, Hangzhou, China
| | - Xiang Li
- Cortical Architecture Imaging and Discovery Lab, Department of Computer Science and Bioimaging Research Center, University of Georgia, Athens, GA, USA
| | - Meng Li
- Brain and Behavior Discovery Institute, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Cheng Lyu
- Cortical Architecture Imaging and Discovery Lab, Department of Computer Science and Bioimaging Research Center, University of Georgia, Athens, GA, USA
| | - Hanbo Chen
- Cortical Architecture Imaging and Discovery Lab, Department of Computer Science and Bioimaging Research Center, University of Georgia, Athens, GA, USA
| | - Yaowu Chen
- Zhejiang University Embedded System Engineering Research Center, Ministry of Education of China, Hangzhou, China
| | - Xuesong Liu
- Zhejiang Provincial Key Laboratory for Network Multimedia Technologies, Zhejiang University, Hangzhou, China
| | - Joe Tsien
- Brain and Behavior Discovery Institute, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Tianming Liu
- Cortical Architecture Imaging and Discovery Lab, Department of Computer Science and Bioimaging Research Center, University of Georgia, Athens, GA, USA.
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21
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Aberrant cardiolipin metabolism is associated with cognitive deficiency and hippocampal alteration in tafazzin knockdown mice. Biochim Biophys Acta Mol Basis Dis 2018; 1864:3353-3367. [PMID: 30055293 DOI: 10.1016/j.bbadis.2018.07.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 06/14/2018] [Accepted: 07/19/2018] [Indexed: 12/17/2022]
Abstract
Cardiolipin (CL) is a key mitochondrial phospholipid essential for mitochondrial energy production. CL is remodeled from monolysocardiolipin (MLCL) by the enzyme tafazzin (TAZ). Loss-of-function mutations in the gene which encodes TAZ results in a rare X-linked disorder called Barth Syndrome (BTHS). The mutated TAZ is unable to maintain the physiological CL:MLCL ratio, thus reducing CL levels and affecting mitochondrial function. BTHS is best known as a cardiac disease, but has been acknowledged as a multi-syndrome disorder, including cognitive deficits. Since reduced CL levels has also been reported in numerous neurodegenerative disorders, we examined how TAZ-deficiency impacts cognitive abilities, brain mitochondrial respiration and the function of hippocampal neurons and glia in TAZ knockdown (TAZ kd) mice. We have identified for the first time the profile of changes that occur in brain phospholipid content and composition of TAZ kd mice. The brain of TAZ kd mice exhibited reduced TAZ protein expression, reduced total CL levels and a 19-fold accumulation of MLCL compared to wild-type littermate controls. TAZ kd brain exhibited a markedly distinct profile of CL and MLCL molecular species. In mitochondria, the activity of complex I was significantly elevated in the monomeric and supercomplex forms with TAZ-deficiency. This corresponded with elevated mitochondrial state I respiration and attenuated spare capacity. Furthermore, the production of reactive oxygen species was significantly elevated in TAZ kd brain mitochondria. While motor function remained normal in TAZ kd mice, they showed significant memory deficiency based on novel object recognition test. These results correlated with reduced synaptophysin protein levels and derangement of the neuronal CA1 layer in hippocampus. Finally, TAZ kd mice had elevated activation of brain immune cells, microglia compared to littermate controls. Collectively, our findings demonstrate that TAZ-mediated remodeling of CL contributes significantly to the expansive distribution of CL molecular species in the brain, plays a key role in mitochondria respiratory activity, maintains normal cognitive function, and identifies the hippocampus as a potential therapeutic target for BTHS.
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22
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Belblidia H, Leger M, Abdelmalek A, Quiedeville A, Calocer F, Boulouard M, Jozet-Alves C, Freret T, Schumann-Bard P. Characterizing age-related decline of recognition memory and brain activation profile in mice. Exp Gerontol 2018. [PMID: 29524468 DOI: 10.1016/j.exger.2018.03.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Episodic memory decline is one of the earlier deficits occurring during normal aging in humans. The question of spatial versus non-spatial sensitivity to age-related memory decline is of importance for a full understanding of these changes. Here, we characterized the effect of normal aging on both non-spatial (object) and spatial (object location) memory performances as well as on associated neuronal activation in mice. Novel-object (NOR) and object-location (OLR) recognition tests, respectively assessing the identity and spatial features of object memory, were examined at different ages. We show that memory performances in both tests were altered by aging as early as 15 months of age: NOR memory was partially impaired whereas OLR memory was found to be fully disrupted at 15 months of age. Brain activation profiles were assessed for both tests using immunohistochemical detection of c-Fos (neuronal activation marker) in 3and 15 month-old mice. Normal performances in NOR task by 3 month-old mice were associated to an activation of the hippocampus and a trend towards an activation in the perirhinal cortex, in a way that did significantly differ with 15 month-old mice. During OLR task, brain activation took place in the hippocampus in 3 month-old but not significantly in 15 month-old mice, which were fully impaired at this task. These differential alterations of the object- and object-location recognition memory may be linked to differential alteration of the neuronal networks supporting these tasks.
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Affiliation(s)
- Hassina Belblidia
- Université de Caen Normandie, UFR SANTE, Faculté des Sciences Pharmaceutiques, INSERM UMR 1075, COMETE-MOBILITES "Vieillissement, Pathologie, Santé", 14032 Caen, France; Université des Sciences et de la Technologie Houari Boumediene USTHB, Département de biologie, Laboratoire de Neurosciences Comportementales et Cognitives, 16111 Alger, Algeria; Université M'hamed Bougara UMBB, Faculté des Sciences, 35000 Boumerdès, Algeria
| | - Marianne Leger
- Université de Caen Normandie, UFR SANTE, Faculté des Sciences Pharmaceutiques, INSERM UMR 1075, COMETE-MOBILITES "Vieillissement, Pathologie, Santé", 14032 Caen, France
| | - Abdelouadoud Abdelmalek
- Université des Sciences et de la Technologie Houari Boumediene USTHB, Département de biologie, Laboratoire de Neurosciences Comportementales et Cognitives, 16111 Alger, Algeria
| | - Anne Quiedeville
- Université de Caen Normandie, UFR SANTE, Faculté des Sciences Pharmaceutiques, INSERM UMR 1075, COMETE-MOBILITES "Vieillissement, Pathologie, Santé", 14032 Caen, France
| | - Floriane Calocer
- Université de Caen Normandie, UFR SANTE, Faculté des Sciences Pharmaceutiques, INSERM UMR 1075, COMETE-MOBILITES "Vieillissement, Pathologie, Santé", 14032 Caen, France
| | - Michel Boulouard
- Université de Caen Normandie, UFR SANTE, Faculté des Sciences Pharmaceutiques, INSERM UMR 1075, COMETE-MOBILITES "Vieillissement, Pathologie, Santé", 14032 Caen, France
| | | | - Thomas Freret
- Université de Caen Normandie, UFR SANTE, Faculté des Sciences Pharmaceutiques, INSERM UMR 1075, COMETE-MOBILITES "Vieillissement, Pathologie, Santé", 14032 Caen, France
| | - Pascale Schumann-Bard
- Université de Caen Normandie, UFR SANTE, Faculté des Sciences Pharmaceutiques, INSERM UMR 1075, COMETE-MOBILITES "Vieillissement, Pathologie, Santé", 14032 Caen, France.
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23
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Kafkas A, Montaldi D. How do memory systems detect and respond to novelty? Neurosci Lett 2018; 680:60-68. [PMID: 29408218 PMCID: PMC6565889 DOI: 10.1016/j.neulet.2018.01.053] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 01/25/2018] [Accepted: 01/27/2018] [Indexed: 12/22/2022]
Abstract
The efficiency of the memory system lies not only in its readiness to detect and retrieve old stimuli but also in its ability to detect and integrate novel information. In this review, we discuss recent evidence suggesting that the neural substrates sensitive to detecting familiarity and novelty are not entirely overlapping. Instead, these partially distinct familiarity and novelty signals are integrated to support recognition memory decisions. We propose here that the mediodorsal thalamus is critical for familiarity detection, and for combining novelty signals from the medial temporal lobe cortex with the relative familiarity outputs of computations performed in other cortical structures, especially the prefrontal cortex. Importantly, we argue that the anterior hippocampus has a prominent role in detecting novelty and in communicating this with midbrain and striatal structures. We argue that different types of novelty (absolute or contextual) engage different neurotransmitter systems that converge in the hippocampus. We suggest that contextual or unexpected novelty triggers dopaminergic hippocampal-midbrain coupling and noradrenergic-mediated pupil dilation. In contrast, absolute novelty triggers cholinergic-mediated hippocampal encoding accompanied by diminished pupil dilation. These two, distinct hippocampal encoding mechanisms both lead to later recollection but are sensitive to different types of novelty. We conclude that this neurotransmitter-mediated hippocampal encoding establishes the hippocampus in an encoding mode that briefly prevents the engagement of retrieval.
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Affiliation(s)
- Alex Kafkas
- Memory Research Unit, School of Biological Sciences, Division of Neuroscience & Experimental Psychology, University of Manchester, UK.
| | - Daniela Montaldi
- Memory Research Unit, School of Biological Sciences, Division of Neuroscience & Experimental Psychology, University of Manchester, UK
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24
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Geist PA, Dulka BN, Barnes A, Totty M, Datta S. RETRACTED: BNDF heterozygosity is associated with memory deficits and alterations in cortical and hippocampal EEG power. Behav Brain Res 2017; 332:154-163. [PMID: 28576309 PMCID: PMC5534188 DOI: 10.1016/j.bbr.2017.05.039] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 05/02/2017] [Accepted: 05/11/2017] [Indexed: 12/31/2022]
Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of the Editor-in-Chief, the Corresponding Author and the Institutional Research Integrity office at the University of Tennessee due to data mis-management of the project, including inappropriate removal of animals from analyses and use of unapproved euthanasia.
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Affiliation(s)
- Phillip A Geist
- Department of Anesthesiology, Graduate School of Medicine, The University of Tennessee, 1924 Alcoa Highway, Knoxville, TN 37920, United States
| | - Brooke N Dulka
- Department of Psychology, College of Arts and Sciences, 1404 Circle Drive, United States
| | - Abigail Barnes
- Department of Anesthesiology, Graduate School of Medicine, The University of Tennessee, 1924 Alcoa Highway, Knoxville, TN 37920, United States; Department of Psychology, College of Arts and Sciences, 1404 Circle Drive, United States
| | - Michael Totty
- Department of Anesthesiology, Graduate School of Medicine, The University of Tennessee, 1924 Alcoa Highway, Knoxville, TN 37920, United States
| | - Subimal Datta
- Department of Anesthesiology, Graduate School of Medicine, The University of Tennessee, 1924 Alcoa Highway, Knoxville, TN 37920, United States; Department of Psychology, College of Arts and Sciences, 1404 Circle Drive, United States; Program in Comparative and Experimental Medicine, 2407 River Drive, RM A102, The University of Tennessee, Knoxville, TN 37996, United States.
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25
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Hauser MJ, Isbrandt D, Roeper J. Disturbances of novel object exploration and recognition in a chronic ketamine mouse model of schizophrenia. Behav Brain Res 2017. [PMID: 28634108 DOI: 10.1016/j.bbr.2017.06.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Schizophrenia is a chronic and devastating disease with an overall lifetime risk of 1%. While positive symptoms of schizophrenia such as hallucinations and delusions are reduced by antipsychotic medication based on the inhibition of type 2 dopaminergic receptors (D2R), negative symptoms (e.g. reduced motivation) and cognitive symptoms (e.g. impaired working memory) of schizophrenia are not effectively treated by current medication. This dichotomy might arise in part because of our limited understanding of the pathophysiology of negative and cognitive symptoms in schizophrenia. In addition to genetic approaches, chronic systemic application of NMDA inhibitors such as ketamine have been used to generate rodent models, which displayed several relevant endophenotypes related to negative and cognitive symptoms and might thus facilitate mechanistic studies into the underlying pathophysiology. In this context, previous behavioral testing identified impairments in novel object recognition memory as a key feature in chronic NMDA-inhibitor schizophrenia rodent models. Using a chronic ketamine mouse model, we have however identified are more complex behavioral phenotype including deficits in novel space and novel object exploration in combination deficits in short-term novel object recognition memory. These impairments in novelty discrimination are in line with prefrontal and hippocampal reductions in parvalbumin-expression as well as reduced expression of the early immediate gene c-fos after novel-object exploration in hippocampal areas in our model. Our results indicate that adult C57Bl6N mice chronically treated with ketamine display combined impairments in novelty exploration and recognition, which might represent both motivational (negative) and cognitive symptoms of schizophrenia.
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Affiliation(s)
- Maria Jelena Hauser
- Institute of Neurophysiology, Neuroscience Center, Goethe University Frankfurt, Germany
| | - Dirk Isbrandt
- DZNE Research Team Experimental Neurophysiology, University Hospital Cologne, Germany
| | - Jochen Roeper
- Institute of Neurophysiology, Neuroscience Center, Goethe University Frankfurt, Germany.
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26
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Vuong B, Odero G, Rozbacher S, Stevenson M, Kereliuk SM, Pereira TJ, Dolinsky VW, Kauppinen TM. Exposure to gestational diabetes mellitus induces neuroinflammation, derangement of hippocampal neurons, and cognitive changes in rat offspring. J Neuroinflammation 2017; 14:80. [PMID: 28388927 PMCID: PMC5384149 DOI: 10.1186/s12974-017-0859-9] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 03/30/2017] [Indexed: 12/18/2022] Open
Abstract
Background Birth cohort studies link gestational diabetes mellitus (GDM) with impaired cognitive performance in the offspring. However, the mechanisms involved are unknown. We tested the hypothesis that obesity-associated GDM induces chronic neuroinflammation and disturbs the development of neuronal circuitry resulting in impaired cognitive abilities in the offspring. Methods In rats, GDM was induced by feeding dams a diet high in sucrose and fatty acids. Brains of neonatal (E20) and young adult (15-week-old) offspring of GDM and lean dams were analyzed by immunohistochemistry, cytokine assay, and western blotting. Young adult offspring of GDM and lean dams went also through cognitive assessment. Cultured microglial responses to elevated glucose and/or fatty acids levels were analyzed. Results In rats, impaired recognition memory was observed in the offspring of GDM dams. GDM exposure combined with a postnatal high-fat and sucrose diet resulted in atypical inattentive behavior in the offspring. These cognitive changes correlated with reduced density and derangement of Cornu Ammonis 1 pyramidal neuronal layer, decreased hippocampal synaptic integrity, increased neuroinflammatory status, and reduced expression of CX3CR1, the microglial fractalkine receptor regulating microglial pro-inflammatory responses and synaptic pruning. Primary microglial cultures that were exposed to high concentrations of glucose and/or palmitate were transformed into an activated, amoeboid morphology with increased nitric oxide and superoxide production, and altered their cytokine release profile. Conclusions These findings demonstrate that GDM stimulates microglial activation and chronic inflammatory responses in the brain of the offspring that persist into young adulthood. Reactive gliosis correlates positively with hippocampal synaptic decline and cognitive impairments. The elevated pro-inflammatory cytokine expression at the critical period of hippocampal synaptic maturation suggests that neuroinflammation might drive the synaptic and cognitive decline in the offspring of GDM dams. The importance of microglia in this process is supported by the reduced Cx3CR1 expression as an indication of the loss of microglial control of inflammatory responses and phagocytosis and synaptic pruning in GDM offspring.
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Affiliation(s)
- Billy Vuong
- Department of Pharmacology and Therapeutics, University of Manitoba, 753 McDermot Avenue, Winnipeg, Manitoba, R3E 0T6, Canada.,Neuroscience Research Program, Kleysen Institute for Advanced Medicine, Health Sciences Center, SR434 - 710 William Avenue, Winnipeg, Manitoba, R3E 0Z3, Canada
| | - Gary Odero
- Department of Pharmacology and Therapeutics, University of Manitoba, 753 McDermot Avenue, Winnipeg, Manitoba, R3E 0T6, Canada.,Neuroscience Research Program, Kleysen Institute for Advanced Medicine, Health Sciences Center, SR434 - 710 William Avenue, Winnipeg, Manitoba, R3E 0Z3, Canada
| | - Stephanie Rozbacher
- Neuroscience Research Program, Kleysen Institute for Advanced Medicine, Health Sciences Center, SR434 - 710 William Avenue, Winnipeg, Manitoba, R3E 0Z3, Canada
| | - Mackenzie Stevenson
- Neuroscience Research Program, Kleysen Institute for Advanced Medicine, Health Sciences Center, SR434 - 710 William Avenue, Winnipeg, Manitoba, R3E 0Z3, Canada
| | - Stephanie M Kereliuk
- Department of Pharmacology and Therapeutics, University of Manitoba, 753 McDermot Avenue, Winnipeg, Manitoba, R3E 0T6, Canada.,The Children's Hospital Research Institute of Manitoba, 601 John Buhler Research Centre, 715 McDermott Avenue, Winnipeg, Manitoba, R3E 3P4, Canada
| | - Troy J Pereira
- Department of Pharmacology and Therapeutics, University of Manitoba, 753 McDermot Avenue, Winnipeg, Manitoba, R3E 0T6, Canada.,The Children's Hospital Research Institute of Manitoba, 601 John Buhler Research Centre, 715 McDermott Avenue, Winnipeg, Manitoba, R3E 3P4, Canada
| | - Vernon W Dolinsky
- Department of Pharmacology and Therapeutics, University of Manitoba, 753 McDermot Avenue, Winnipeg, Manitoba, R3E 0T6, Canada.,The Children's Hospital Research Institute of Manitoba, 601 John Buhler Research Centre, 715 McDermott Avenue, Winnipeg, Manitoba, R3E 3P4, Canada
| | - Tiina M Kauppinen
- Department of Pharmacology and Therapeutics, University of Manitoba, 753 McDermot Avenue, Winnipeg, Manitoba, R3E 0T6, Canada. .,Neuroscience Research Program, Kleysen Institute for Advanced Medicine, Health Sciences Center, SR434 - 710 William Avenue, Winnipeg, Manitoba, R3E 0Z3, Canada. .,The Children's Hospital Research Institute of Manitoba, 601 John Buhler Research Centre, 715 McDermott Avenue, Winnipeg, Manitoba, R3E 3P4, Canada.
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27
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Kinnavane L, Amin E, Olarte-Sánchez CM, Aggleton JP. Medial temporal pathways for contextual learning: Network c- fos mapping in rats with or without perirhinal cortex lesions. Brain Neurosci Adv 2017; 1:2398212817694167. [PMID: 28685167 PMCID: PMC5496664 DOI: 10.1177/2398212817694167] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 01/25/2017] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND In the rat brain, context information is thought to engage network interactions between the postrhinal cortex, medial entorhinal cortex, and the hippocampus. In contrast, object information is thought to be more reliant on perirhinal cortex and lateral entorhinal cortex interactions with the hippocampus. METHOD The 'context network' was explored by mapping expression of the immediate-early gene, c-fos, after exposure to a new spatial environment. RESULTS Structural equation modelling of Fos counts produced networks of good fit that closely matched prior predictions based on anatomically-grounded functional models. These same models did not, however, fit the Fos data from home-cage controls nor did they fit the corresponding data from a previous study exploring object recognition. These additional analyses highlight the specificity of the context network. The home-cage controls, meanwhile, showed raised levels of inter-area Fos correlations between the many sites examined, i.e., their changes in Fos levels lacked anatomical specificity. Two additional groups of rats received perirhinal cortex lesions. While the loss of perirhinal cortex reduced lateral entorhinal c-fos activity, it did not affect mean levels of hippocampal c-fos expression. Similarly, overall c-fos expression in the prelimbic cortex, retrosplenial cortex and nucleus reuniens of the thalamus appeared unaffected by the perirhinal cortex lesions. CONCLUSION The perirhinal cortex lesions disrupted network interactions involving the medial entorhinal cortex and the hippocampus, highlighting ways in which perirhinal cortex might affect specific aspects of context learning.
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Affiliation(s)
| | - Eman Amin
- School of Psychology, Cardiff University, Cardiff, UK
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28
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Weilbächer RA, Gluth S. The Interplay of Hippocampus and Ventromedial Prefrontal Cortex in Memory-Based Decision Making. Brain Sci 2016; 7:brainsci7010004. [PMID: 28036071 PMCID: PMC5297293 DOI: 10.3390/brainsci7010004] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 12/16/2016] [Accepted: 12/23/2016] [Indexed: 12/21/2022] Open
Abstract
Episodic memory and value-based decision making are two central and intensively studied research domains in cognitive neuroscience, but we are just beginning to understand how they interact to enable memory-based decisions. The two brain regions that have been associated with episodic memory and value-based decision making are the hippocampus and the ventromedial prefrontal cortex, respectively. In this review article, we first give an overview of these brain–behavior associations and then focus on the mechanisms of potential interactions between the hippocampus and ventromedial prefrontal cortex that have been proposed and tested in recent neuroimaging studies. Based on those possible interactions, we discuss several directions for future research on the neural and cognitive foundations of memory-based decision making.
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Affiliation(s)
| | - Sebastian Gluth
- Department of Psychology, University of Basel, Basel 4055, Switzerland.
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