1
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Crum J, Ronca F, Herbert G, Carmona E, Jones I, Hakim U, Hamer M, Hirsch J, Hamilton A, Tachtsidis I, Burgess PW. Body fat predictive of acute effects of exercise on prefrontal hemodynamics and speed. Neuropsychologia 2024; 196:108805. [PMID: 38340963 DOI: 10.1016/j.neuropsychologia.2024.108805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 01/15/2024] [Accepted: 01/24/2024] [Indexed: 02/12/2024]
Affiliation(s)
- James Crum
- Institute of Cognitive Neuroscience, University College London, London, UK; Institute of Cognitive Science, University of Colorado, 1777 Exposition Dr, Boulder, CO, USA.
| | - Flaminia Ronca
- Institute of Sport Exercise and Health, University College London, London, UK
| | - George Herbert
- Institute of Cognitive Neuroscience, University College London, London, UK
| | - Estela Carmona
- Institute of Cognitive Neuroscience, University College London, London, UK
| | - Isla Jones
- Institute of Cognitive Neuroscience, University College London, London, UK
| | - Uzair Hakim
- Department of Medical Physics and Biomedical Engineering, University College London, London, UK
| | - Mark Hamer
- Institute of Sport Exercise and Health, University College London, London, UK
| | - Joy Hirsch
- Department of Medical Physics and Biomedical Engineering, University College London, London, UK; Brain Function Laboratory, Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA; Department of Neuroscience, Yale School of Medicine, New Haven, CT, USA; Department of Comparative Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Antonia Hamilton
- Institute of Cognitive Neuroscience, University College London, London, UK
| | - Ilias Tachtsidis
- Department of Medical Physics and Biomedical Engineering, University College London, London, UK
| | - Paul W Burgess
- Institute of Cognitive Neuroscience, University College London, London, UK
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2
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Chang WL, Hen R. Adult Neurogenesis, Context Encoding, and Pattern Separation: A Pathway for Treating Overgeneralization. ADVANCES IN NEUROBIOLOGY 2024; 38:163-193. [PMID: 39008016 DOI: 10.1007/978-3-031-62983-9_10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
In mammals, the subgranular zone of the dentate gyrus is one of two brain regions (with the subventricular zone of the olfactory bulb) that continues to generate new neurons throughout adulthood, a phenomenon known as adult hippocampal neurogenesis (AHN) (Eriksson et al., Nat Med 4:1313-1317, 1998; García-Verdugo et al., J Neurobiol 36:234-248, 1998). The integration of these new neurons into the dentate gyrus (DG) has implications for memory encoding, with unique firing and wiring properties of immature neurons that affect how the hippocampal network encodes and stores attributes of memory. In this chapter, we will describe the process of AHN and properties of adult-born cells as they integrate into the hippocampal circuit and mature. Then, we will discuss some methodological considerations before we review evidence for the role of AHN in two major processes supporting memory that are performed by the DG. First, we will discuss encoding of contextual information for episodic memories and how this is facilitated by AHN. Second, will discuss pattern separation, a major role of the DG that reduces interference for the formation of new memories. Finally, we will review clinical and translational considerations, suggesting that stimulation of AHN may help decrease overgeneralization-a common endophenotype of mood, anxiety, trauma-related, and age-related disorders.
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Affiliation(s)
- Wei-Li Chang
- Departments of Psychiatry and Neuroscience, Columbia University, New York, NY, USA
- Division of Systems Neuroscience, New York State Psychiatric Institute, New York, NY, USA
| | - Rene Hen
- Departments of Psychiatry and Neuroscience, Columbia University, New York, NY, USA.
- Division of Systems Neuroscience, New York State Psychiatric Institute, New York, NY, USA.
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3
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González Ibáñez F, Halvorson T, Sharma K, McKee CG, Carrier M, Picard K, Vernoux N, Bisht K, Deslauriers J, Lalowski M, Tremblay MÈ. Ketogenic diet changes microglial morphology and the hippocampal lipidomic profile differently in stress susceptible versus resistant male mice upon repeated social defeat. Brain Behav Immun 2023; 114:383-406. [PMID: 37689276 DOI: 10.1016/j.bbi.2023.09.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 08/30/2023] [Accepted: 09/06/2023] [Indexed: 09/11/2023] Open
Abstract
Psychological stress confers an increased risk for several diseases including psychiatric conditions. The susceptibility to psychological stress is modulated by various factors, many of them being modifiable lifestyle choices. The ketogenic diet (KD) has emerged as a dietary regime that offers positive outcomes on mood and health status. Psychological stress and elevated inflammation are common features of neuropsychiatric disorders such as certain types of major depressive disorder. KD has been attributed anti-inflammatory properties that could underlie its beneficial consequences on the brain and behavior. Microglia are the main drivers of inflammation in the central nervous system. They are known to respond to both dietary changes and psychological stress, notably by modifying their production of cytokines and relationships among the brain parenchyma. To assess the interactions between KD and the stress response, including effects on microglia, we examined adult male mice on control diet (CD) versus KD that underwent 10 days of repeated social defeat (RSD) or remained non-stressed (controls; CTRLs). Through a social interaction test, stressed mice were classified as susceptible (SUS) or resistant (RES) to RSD. The mouse population fed a KD tended to have a higher proportion of individuals classified as RES following RSD. Microglial morphology and ultrastructure were then analyzed in the ventral hippocampus CA1, a brain region known to present structural alterations as a response to psychological stress. Distinct changes in microglial soma and arborization linked to the KD, SUS and RES phenotypes were revealed. Ultrastructural analysis by electron microscopy showed a clear reduction of cellular stress markers in microglia from KD fed animals. Furthermore, ultrastructural analysis showed that microglial contacts with synaptic elements were reduced in the SUS compared to the RES and CTRL groups. Hippocampal lipidomic analyses lastly identified a distinct lipid profile in SUS animals compared to CTRLs. These key differences, combined with the distinct microglial responses to diet and stress, indicate that unique metabolic changes may underlie the stress susceptibility phenotypes. Altogether, our results reveal novel mechanisms by which a KD might improve the resistance to psychological stress.
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Affiliation(s)
- Fernando González Ibáñez
- Axe Neurosciences, Centre de Recherche du CHU de Québec-Université Laval, Québec, Quebec, Canada; Département de Médecine Moléculaire, Université Laval, Québec, Quebec, Canada; Division of Medical Sciences, University of Victoria, Victoria, British Columbia, Canada
| | - Torin Halvorson
- Division of Medical Sciences, University of Victoria, Victoria, British Columbia, Canada; Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kaushik Sharma
- Axe Neurosciences, Centre de Recherche du CHU de Québec-Université Laval, Québec, Quebec, Canada; Département de Médecine Moléculaire, Université Laval, Québec, Quebec, Canada; Department of Chemistry, Purdue University, West Lafayette, Indiana, United States
| | - Chloe Grace McKee
- Division of Medical Sciences, University of Victoria, Victoria, British Columbia, Canada
| | - Micaël Carrier
- Axe Neurosciences, Centre de Recherche du CHU de Québec-Université Laval, Québec, Quebec, Canada; Département de Médecine Moléculaire, Université Laval, Québec, Quebec, Canada; Division of Medical Sciences, University of Victoria, Victoria, British Columbia, Canada
| | - Katherine Picard
- Axe Neurosciences, Centre de Recherche du CHU de Québec-Université Laval, Québec, Quebec, Canada; Département de Médecine Moléculaire, Université Laval, Québec, Quebec, Canada; Division of Medical Sciences, University of Victoria, Victoria, British Columbia, Canada
| | - Nathalie Vernoux
- Axe Neurosciences, Centre de Recherche du CHU de Québec-Université Laval, Québec, Quebec, Canada
| | - Kanchan Bisht
- Axe Neurosciences, Centre de Recherche du CHU de Québec-Université Laval, Québec, Quebec, Canada; Département de Médecine Moléculaire, Université Laval, Québec, Quebec, Canada; Department of Chemistry, Purdue University, West Lafayette, Indiana, United States
| | | | - Maciej Lalowski
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland; Biochemistry/Developmental Biology and HiLIFE, Meilahti Clinical Proteomics Core Facility, University of Helsinki, Finland
| | - Marie-Ève Tremblay
- Axe Neurosciences, Centre de Recherche du CHU de Québec-Université Laval, Québec, Quebec, Canada; Département de Médecine Moléculaire, Université Laval, Québec, Quebec, Canada; Division of Medical Sciences, University of Victoria, Victoria, British Columbia, Canada; Neurology and Neurosurgery Department, McGill University, Montréal, Quebec, Canada; Department of Biochemistry and Molecular Biology, The University of British Columbia, Vancouver, British Columbia, Canada; Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, British Columbia, Canada.
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4
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González Ibáñez F, Halvorson T, Sharma K, McKee C, Carrier M, Picard K, Vernoux N, Bisht K, Deslauriers J, Lalowski M, Tremblay MÈ. Ketogenic diet alters microglial morphology and changes the hippocampal lipidomic profile distinctively in stress susceptible versus resistant male mice upon repeated social defeat. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.28.555135. [PMID: 37693370 PMCID: PMC10491121 DOI: 10.1101/2023.08.28.555135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Psychological stress confers an increased risk for several diseases including psychiatric conditions. The susceptibility to psychological stress is modulated by various factors, many of them being modifiable lifestyle choices. The ketogenic diet (KD) has emerged as a dietary regime that offers positive outcomes on mood and health status. Psychological stress and elevated inflammation are common features of neuropsychiatric disorders such as certain types of major depressive disorder. KD has been attributed anti-inflammatory properties that could underlie its beneficial consequences on the brain and behavior. Microglia are the main drivers of inflammation in the central nervous system. They are known to respond to both dietary changes and psychological stress, notably by modifying their production of cytokines and relationships among the brain parenchyma. To assess the interactions between KD and the stress response, including effects on microglia, we examined adult male mice on control diet (CD) versus KD that underwent 10 days of repeated social defeat (RSD) or remained non-stressed (controls; CTRLs). Through a social interaction test, stressed mice were classified as susceptible (SUS) or resistant (RES) to RSD. The mouse population fed a KD tended to have a higher proportion of individuals classified as RES following RSD. Microglial morphology and ultrastructure were then analyzed in the ventral hippocampus CA1, a brain region known to present structural alterations as a response to psychological stress. Distinct changes in microglial soma and arborization linked to the KD, SUS and RES phenotypes were revealed. Ultrastructural analysis by electron microscopy showed a clear reduction of cellular stress markers in microglia from KD fed animals. Furthermore, ultrastructural analysis showed that microglial contacts with synaptic elements were reduced in the SUS compared to the RES and CTRL groups. Hippocampal lipidomic analyses lastly identified a distinct lipid profile in SUS animals compared to CTRLs. These key differences, combined with the distinct microglial responses to diet and stress, indicate that unique metabolic changes may underlie the stress susceptibility phenotypes. Altogether, our results reveal novel mechanisms by which a KD might improve the resistance to psychological stress.
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Affiliation(s)
- Fernando González Ibáñez
- Axe neurosciences, Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
- Département de médecine moléculaire, Université Laval, Québec City, QC, Canada
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
| | - Torin Halvorson
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
- Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Kaushik Sharma
- Axe neurosciences, Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
- Département de médecine moléculaire, Université Laval, Québec City, QC, Canada
- Department of Chemistry, Purdue University, West Lafayette, IN, United States of America
| | - Chloe McKee
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
| | - Micaël Carrier
- Axe neurosciences, Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
- Département de médecine moléculaire, Université Laval, Québec City, QC, Canada
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
| | - Katherine Picard
- Axe neurosciences, Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
- Département de médecine moléculaire, Université Laval, Québec City, QC, Canada
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
| | - Nathalie Vernoux
- Axe neurosciences, Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
| | - Kanchan Bisht
- Axe neurosciences, Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
- Département de médecine moléculaire, Université Laval, Québec City, QC, Canada
- Department of Chemistry, Purdue University, West Lafayette, IN, United States of America
| | | | - Maciej Lalowski
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
- Biochemistry/Developmental Biology, Meilahti Clinical Proteomics Core Facility, University of Helsinki, Finland
| | - Marie-Ève Tremblay
- Axe neurosciences, Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
- Département de médecine moléculaire, Université Laval, Québec City, QC, Canada
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
- Neurology and Neurosurgery Department, McGill University, Montréal, QC, Canada
- Department of Biochemistry and Molecular Biology, The University of British Columbia, Vancouver, BC, Canada
- Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, BC, Canada
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5
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Lee KY, Rhodes JS, Saif MTA. Astrocyte-mediated Transduction of Muscle Fiber Contractions Synchronizes Hippocampal Neuronal Network Development. Neuroscience 2023; 515:25-36. [PMID: 36736611 PMCID: PMC10023357 DOI: 10.1016/j.neuroscience.2023.01.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 01/08/2023] [Accepted: 01/24/2023] [Indexed: 02/05/2023]
Abstract
Exercise supports brain health in part by enhancing hippocampal function. The leading hypothesis is that muscles release factors when they contract (e.g., lactate, myokines, growth factors) that enter circulation and reach the brain where they enhance plasticity (e.g., increase neurogenesis and synaptogenesis). However, it remains unknown how the muscle signals are transduced by the hippocampal cells to modulate network activity and synaptic development. Thus, we established an in vitro model in which the media from contracting primary muscle cells (CM) is applied to developing primary hippocampal cell cultures on a microelectrode array. We found that the hippocampal neuronal network matures more rapidly (as indicated by synapse development and synchronous neuronal activity) when exposed to CM than regular media (RM). This was accompanied by a 4.4- and 1.4-fold increase in the proliferation of astrocytes and neurons, respectively. Further, experiments established that factors released by astrocytes inhibit neuronal hyper-excitability induced by muscle media, and facilitate network development. Results provide new insight into how exercise may support hippocampal function by regulating astrocyte proliferation and subsequent taming of neuronal activity into an integrated network.
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Affiliation(s)
- Ki Yun Lee
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| | - Justin S Rhodes
- Department of Psychology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| | - M Taher A Saif
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
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6
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Gao Y, Syed M, Zhao X. Mechanisms underlying the effect of voluntary running on adult hippocampal neurogenesis. Hippocampus 2023; 33:373-390. [PMID: 36892196 PMCID: PMC10566571 DOI: 10.1002/hipo.23520] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 02/11/2023] [Accepted: 02/17/2023] [Indexed: 03/10/2023]
Abstract
Adult hippocampal neurogenesis is important for preserving learning and memory-related cognitive functions. Physical exercise, especially voluntary running, is one of the strongest stimuli to promote neurogenesis and has beneficial effects on cognitive functions. Voluntary running promotes exit of neural stem cells (NSCs) from the quiescent stage, proliferation of NSCs and progenitors, survival of newborn cells, morphological development of immature neuron, and integration of new neurons into the hippocampal circuitry. However, the detailed mechanisms driving these changes remain unclear. In this review, we will summarize current knowledge with respect to molecular mechanisms underlying voluntary running-induced neurogenesis, highlighting recent genome-wide gene expression analyses. In addition, we will discuss new approaches and future directions for dissecting the complex cellular mechanisms driving change in adult-born new neurons in response to physical exercise.
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Affiliation(s)
- Yu Gao
- Waisman Center, University of Wisconsin-Madison, Madison, WI 53705, USA
- Department of Neuroscience, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Moosa Syed
- Waisman Center, University of Wisconsin-Madison, Madison, WI 53705, USA
- Department of Neuroscience, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Xinyu Zhao
- Waisman Center, University of Wisconsin-Madison, Madison, WI 53705, USA
- Department of Neuroscience, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
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7
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Yuk KH, Lee SM, Bae WR, Park JY, Woo SW, Song P, Jeong IC, Kim JS, Moon HY. Distinct effect of exercise modes on mood-related behavior in mice. Biochem Biophys Res Commun 2023; 646:36-43. [PMID: 36701893 DOI: 10.1016/j.bbrc.2023.01.047] [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: 11/30/2022] [Revised: 12/11/2022] [Accepted: 01/14/2023] [Indexed: 01/22/2023]
Abstract
Exercise can afford several benefits to combat mood disorders in both rodents and humans. Engagement in various physical activities upregulates levels of neurotrophic factors in several brain regions and improves mental health. However, the type of exercise that regulates mood and the underlying mechanisms in the brain remain elusive. Herein, we performed two distinct types of exercise and RNA sequencing analyses to investigate the effect of exercise on mood-related behaviors and explain the distinct patterns of gene expression. Specifically, resistance exercise exhibited reduced immobility time in the forced swim test when compared with both no exercise and treadmill exercise (in the aerobic training [AT] group). Interestingly, anxiety-like behaviors in the open field and nest-building tests were ameliorated in the AT group when compared with those in the control group; however, this was not observed in the RT group. To elucidate the mechanism underlying these different behavioral changes caused by distinct exercise types, we examined the shift in the gene expression pattern in the hippocampus, a brain region that plays a critical role in regulating mood. We discovered that 38 and 40 genes were altered in the AT and RT groups, respectively, compared with the control group. Both exercises regulated 16 common genes. Compared with the control group, mitogen-activated protein kinase (MAPK) was enriched in the AT group and phosphatidylinositol-3-kinase (PI3K)/AKT and neurotrophin signaling pathways were enriched in the RT group, as determined by bioinformatics pathway analysis. PCR results revealed that Cebpβ expression was increased in AT group, and Dcx expression was upregulated in both groups. Our findings indicate that different exercise types may exert substantially distinct effects on mood-like behaviors. Accordingly, appropriate types of exercise can be undertaken based on the mood disorder to be regulated.
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Affiliation(s)
- Ki Hoon Yuk
- Dept. of Physical Education, Seoul National University, South Korea
| | - Sun Min Lee
- Dept. of Physical Education, Seoul National University, South Korea
| | - Woo Ri Bae
- Dept. of Physical Education, Seoul National University, South Korea
| | - Jae Yeon Park
- Dept. of Physical Education, Seoul National University, South Korea
| | - Song Won Woo
- Dept. of Physical Education, Seoul National University, South Korea
| | - Parkyong Song
- Department of Convergence Medicine, Pusan National University School of Medicine, Yangsan, 50612, South Korea
| | - In Cheol Jeong
- School of Artificial Intelligence Convergence, Hallym University, Chuncheon, South Korea
| | - Ji-Seok Kim
- Department of Physical Education, Gyeongsang National University, Jinju, South Korea
| | - Hyo Youl Moon
- Dept. of Physical Education, Seoul National University, South Korea; Institute of Sport Science, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea; Institute on Aging, Seoul National University, Seoul, South Korea.
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8
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Noradrenaline activation of hippocampal dopamine D 1 receptors promotes antidepressant effects. Proc Natl Acad Sci U S A 2022; 119:e2117903119. [PMID: 35939697 PMCID: PMC9388128 DOI: 10.1073/pnas.2117903119] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Dopamine D1 receptors (D1Rs) in the hippocampal dentate gyrus (DG) are essential for antidepressant effects. However, the midbrain dopaminergic neurons, the major source of dopamine in the brain, only sparsely project to DG, suggesting possible activation of DG D1Rs by endogenous substances other than dopamine. We have examined this possibility using electrophysiological and biochemical techniques and found robust activation of D1Rs in mouse DG neurons by noradrenaline. Noradrenaline at the micromolar range potentiated synaptic transmission at the DG output and increased the phosphorylation of protein kinase A substrates in DG via activation of D1Rs and β adrenergic receptors. Neuronal excitation preferentially enhanced noradrenaline-induced synaptic potentiation mediated by D1Rs with minor effects on β-receptor-dependent potentiation. Increased voluntary exercise by wheel running also enhanced noradrenaline-induced, D1R-mediated synaptic potentiation, suggesting a distinct functional role of the noradrenaline-D1R signaling. We then examined the role of this signaling in antidepressant effects using mice exposed to chronic restraint stress. In the stressed mice, an antidepressant acting on the noradrenergic system induced a mature-to-immature change in the DG neuron phenotype, a previously proposed cellular substrate for antidepressant action. This effect was evident only in mice subjected to wheel running and blocked by a D1R antagonist. These results suggest a critical role of noradrenaline-induced activation of D1Rs in antidepressant effects in DG. Experience-dependent regulation of noradrenaline-D1R signaling may determine responsiveness to antidepressant drugs in depressive disorders.
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Kujach S, Chroboczek M, Jaworska J, Sawicka A, Smaruj M, Winklewski P, Laskowski R. Judo training program improves brain and muscle function and elevates the peripheral BDNF concentration among the elderly. Sci Rep 2022; 12:13900. [PMID: 35974038 PMCID: PMC9381784 DOI: 10.1038/s41598-022-17719-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 07/29/2022] [Indexed: 11/20/2022] Open
Abstract
Programmed exercise interventions modulating both physical fitness and cognitive functions have become a promising tool to support healthy aging. The aim of this experiment was to determine the effect of a 12-week judo training (JEX) on cognitive processing and muscle function among the elderly. Forty participants were divided into two groups: the JEX group and the control group (CTL). Before and after 12-week of JEX, participants performed a battery of physiological and psychological tests. The peripheral level of brain-derived neurotrophic factor (BDNF) was analyzed. A 12-week JEX intervention led to improved Stroop performance reflected by a shortening of the response time related to Stroop “naming” interference. In addition, the peripheral concentration of BDNF was significantly increased following the JEX compared with the CTL group. In response to JEX, balance and lower limb strength significantly increased. The current results suggest that JEX could have beneficial effects on cognitive functions, denoted by elevated peripheral BDNF, as well as on balance and strength abilities. A combination of positive effects with respect to movement and cognition makes JEX an ideal preventive lifestyle modification for the aging population.
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Affiliation(s)
- Sylwester Kujach
- Department of Human Physiology, Medical University of Gdańsk, Gdańsk, Poland. .,Department of Physiology, Gdansk University of Physical Education and Sport, Gdańsk, Poland.
| | - Maciej Chroboczek
- Department of Physiology, Gdansk University of Physical Education and Sport, Gdańsk, Poland
| | - Joanna Jaworska
- Department of Physiology, Medical University of Gdańsk, Gdańsk, Poland
| | - Angelika Sawicka
- Applied Cognitive Neuroscience Lab, Department of Human Physiology, Medical University of Gdańsk, Gdańsk, Poland
| | - Miroslaw Smaruj
- Department of Theory of Sport and Human Motorics, Gdansk University of Physical Education and Sport, Gdańsk, Poland
| | - Pawel Winklewski
- Department of Human Physiology, Medical University of Gdańsk, Gdańsk, Poland.,2nd Department of Radiology, Medical University of Gdańsk, Gdańsk, Poland
| | - Radoslaw Laskowski
- Department of Physiology, Gdansk University of Physical Education and Sport, Gdańsk, Poland
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10
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Morphogenesis of vascular and neuronal networks and the relationships between their remodeling processes. Brain Res Bull 2022; 186:62-69. [DOI: 10.1016/j.brainresbull.2022.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/18/2022] [Accepted: 05/29/2022] [Indexed: 11/21/2022]
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11
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Chang YS, Lin CL, Lee CW, Lin HC, Wu YT, Shih YH. Exercise Normalized the Hippocampal Renin-Angiotensin System and Restored Spatial Memory Function, Neurogenesis, and Blood-Brain Barrier Permeability in the 2K1C-Hypertensive Mouse. Int J Mol Sci 2022; 23:ijms23105531. [PMID: 35628344 PMCID: PMC9146761 DOI: 10.3390/ijms23105531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/14/2022] [Accepted: 05/14/2022] [Indexed: 02/04/2023] Open
Abstract
Hypertension is associated with blood-brain barrier alteration and brain function decline. Previously, we established the 2-kidney,1-clip (2K1C) hypertensive mice model by renin-angiotensin system (RAS) stimulating. We found that 2K1C-induced hypertension would impair hippocampus-related memory function and decrease adult hippocampal neurogenesis. Even though large studies have investigated the mechanism of hypertension affecting brain function, there remains a lack of efficient ways to halt this vicious effect. The previous study indicated that running exercise ameliorates neurogenesis and spatial memory function in aging mice. Moreover, studies showed that exercise could normalize RAS activity, which might be associated with neurogenesis impairment. Thus, we hypothesize that running exercise could ameliorate neurogenesis and spatial memory function impairment in the 2K1C-hypertension mice. In this study, we performed 2K1C surgery on eight-weeks-old C57BL/6 mice and put them on treadmill exercise one month after the surgery. The results indicate that running exercise improves the spatial memory and neurogenesis impairment of the 2K1C-mice. Moreover, running exercise normalized the activated RAS and blood-brain barrier leakage of the hippocampus, although the blood pressure was not decreased. In conclusion, running exercise could halt hypertension-induced brain impairment through RAS normalization.
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Affiliation(s)
- Ying-Shuang Chang
- Department of Anatomy, School of Medicine, College of Medicine, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Sanmin District, Kaohsiung 80708, Taiwan; (Y.-S.C.); (H.-C.L.)
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Sanmin District, Kaohsiung 80708, Taiwan;
| | - Chih-Lung Lin
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Sanmin District, Kaohsiung 80708, Taiwan;
- Department of Neurosurgery, Kaohsiung Medical University Hospital, 100, Tzyou 1st Road, Sanmin District, Kaohsiung 80756, Taiwan
| | - Chu-Wan Lee
- Department of Nursing, National Tainan Junior College of Nursing, 78, Section 2, Minzu Road, West Central District, Tainan 70043, Taiwan;
| | - Han-Chen Lin
- Department of Anatomy, School of Medicine, College of Medicine, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Sanmin District, Kaohsiung 80708, Taiwan; (Y.-S.C.); (H.-C.L.)
- Department of Medical Research, Kaohsiung Medical University Hospital, 100, Tzyou 1st Road, Sanmin District, Kaohsiung 80756, Taiwan
| | - Yi-Ting Wu
- Department of Nursing, Tzu Hui Institute of Technology, Pingtung County 92641, Taiwan;
| | - Yao-Hsiang Shih
- Department of Anatomy, School of Medicine, College of Medicine, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Sanmin District, Kaohsiung 80708, Taiwan; (Y.-S.C.); (H.-C.L.)
- Department of Medical Research, Kaohsiung Medical University Hospital, 100, Tzyou 1st Road, Sanmin District, Kaohsiung 80756, Taiwan
- Correspondence: ; Tel.: +886-7-3121101 (ext. 2144)
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12
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Jennen L, Mazereel V, Lecei A, Samaey C, Vancampfort D, van Winkel R. Exercise to spot the differences: a framework for the effect of exercise on hippocampal pattern separation in humans. Rev Neurosci 2022; 33:555-582. [PMID: 35172422 DOI: 10.1515/revneuro-2021-0156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 01/16/2022] [Indexed: 12/12/2022]
Abstract
Exercise has a beneficial effect on mental health and cognitive functioning, but the exact underlying mechanisms remain largely unknown. In this review, we focus on the effect of exercise on hippocampal pattern separation, which is a key component of episodic memory. Research has associated exercise with improvements in pattern separation. We propose an integrated framework mechanistically explaining this relationship. The framework is divided into three pathways, describing the pro-neuroplastic, anti-inflammatory and hormonal effects of exercise. The pathways are heavily intertwined and may result in functional and structural changes in the hippocampus. These changes can ultimately affect pattern separation through direct and indirect connections. The proposed framework might guide future research on the effect of exercise on pattern separation in the hippocampus.
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Affiliation(s)
- Lise Jennen
- KU Leuven, Department of Neurosciences, Center for Clinical Psychiatry, ON V Herestraat 49, bus 1029, 3000 Leuven, Belgium
| | - Victor Mazereel
- KU Leuven, Department of Neurosciences, Center for Clinical Psychiatry, ON V Herestraat 49, bus 1029, 3000 Leuven, Belgium.,University Psychiatric Center KU Leuven, Leuvensesteenweg 517, 3070 Leuven-Kortenberg, Belgium
| | - Aleksandra Lecei
- KU Leuven, Department of Neurosciences, Center for Clinical Psychiatry, ON V Herestraat 49, bus 1029, 3000 Leuven, Belgium
| | - Celine Samaey
- KU Leuven, Department of Neurosciences, Center for Clinical Psychiatry, ON V Herestraat 49, bus 1029, 3000 Leuven, Belgium
| | - Davy Vancampfort
- University Psychiatric Center KU Leuven, Leuvensesteenweg 517, 3070 Leuven-Kortenberg, Belgium.,KU Leuven Department of Rehabilitation Sciences, ON IV Herestraat 49, bus 1510, 3000, Leuven, Belgium
| | - Ruud van Winkel
- KU Leuven, Department of Neurosciences, Center for Clinical Psychiatry, ON V Herestraat 49, bus 1029, 3000 Leuven, Belgium.,University Psychiatric Center KU Leuven, Leuvensesteenweg 517, 3070 Leuven-Kortenberg, Belgium
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13
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Hendrikse J, Chye Y, Thompson S, Rogasch NC, Suo C, Coxon JP, Yücel M. Regular aerobic exercise is positively associated with hippocampal structure and function in young and middle-aged adults. Hippocampus 2021; 32:137-152. [PMID: 34961996 DOI: 10.1002/hipo.23397] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 11/03/2021] [Accepted: 12/05/2021] [Indexed: 01/21/2023]
Abstract
Regular exercise has numerous benefits for brain health, including the structure and function of the hippocampus. The hippocampus plays a critical role in memory function, and is altered in a number of psychiatric disorders associated with memory impairments (e.g., depression and schizophrenia), as well as healthy aging. While many studies have focused on how regular exercise may improve hippocampal integrity in older individuals, less is known about these effects in young to middle-aged adults. Therefore, we assessed the associations of regular exercise and cardiorespiratory fitness with hippocampal structure and function in these age groups. We recruited 40 healthy young to middle-aged adults, comprised of two groups (n = 20) who self-reported either high or low levels of exercise, according to World Health Organization guidelines. We assessed cardiorespiratory fitness using a graded exercise test (VO2 max) and hippocampal structure via manual tracing of T1-weighted magnetic resonance images. We also assessed hippocampal function using magnetic resonance spectroscopy to derive estimates of N-acetyl-aspartate concentration and hippocampal-dependent associative memory and pattern separation tasks. We observed evidence of increased N-acetyl-aspartate concentration and associative memory performance in individuals engaging in high levels of exercise. However, no differences in hippocampal volume or pattern separation capacity were observed between groups. Cardiorespiratory fitness was positively associated with left and right hippocampal volume and N-acetyl-aspartate concentration. However, no associations were observed between cardiorespiratory fitness and associative memory or pattern separation. Therefore, we provide evidence that higher levels of exercise and cardiorespiratory fitness are associated with improved hippocampal structure and function. Exercise may provide a low-risk, effective method of improving hippocampal integrity in an early-to-mid-life stage.
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Affiliation(s)
- Joshua Hendrikse
- Turner Institute for Brain and Mental Health and School of Psychological Sciences, Monash University, Melbourne, Victoria, Australia
| | - Yann Chye
- Turner Institute for Brain and Mental Health and School of Psychological Sciences, Monash University, Melbourne, Victoria, Australia
| | - Sarah Thompson
- Turner Institute for Brain and Mental Health and School of Psychological Sciences, Monash University, Melbourne, Victoria, Australia
| | - Nigel C Rogasch
- Turner Institute for Brain and Mental Health and School of Psychological Sciences, Monash University, Melbourne, Victoria, Australia.,Hopwood Centre for Neurobiology, Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, South Australia, Australia.,Discipline of Psychiatry, Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia
| | - Chao Suo
- Turner Institute for Brain and Mental Health and School of Psychological Sciences, Monash University, Melbourne, Victoria, Australia
| | - James P Coxon
- Turner Institute for Brain and Mental Health and School of Psychological Sciences, Monash University, Melbourne, Victoria, Australia
| | - Murat Yücel
- Turner Institute for Brain and Mental Health and School of Psychological Sciences, Monash University, Melbourne, Victoria, Australia
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14
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Consorti A, Di Marco I, Sansevero G. Physical Exercise Modulates Brain Physiology Through a Network of Long- and Short-Range Cellular Interactions. Front Mol Neurosci 2021; 14:710303. [PMID: 34489641 PMCID: PMC8417110 DOI: 10.3389/fnmol.2021.710303] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 07/23/2021] [Indexed: 12/14/2022] Open
Abstract
In the last decades, the effects of sedentary lifestyles have emerged as a critical aspect of modern society. Interestingly, recent evidence demonstrated that physical exercise plays an important role not only in maintaining peripheral health but also in the regulation of central nervous system function. Many studies have shown that physical exercise promotes the release of molecules, involved in neuronal survival, differentiation, plasticity and neurogenesis, from several peripheral organs. Thus, aerobic exercise has emerged as an intriguing tool that, on one hand, could serve as a therapeutic protocol for diseases of the nervous system, and on the other hand, could help to unravel potential molecular targets for pharmacological approaches. In the present review, we will summarize the cellular interactions that mediate the effects of physical exercise on brain health, starting from the factors released in myocytes during muscle contraction to the cellular pathways that regulate higher cognitive functions, in both health and disease.
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Affiliation(s)
- Alan Consorti
- Neuroscience Institute, National Research Council (CNR), Pisa, Italy.,NEUROFARBA, University of Florence, Florence, Italy
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15
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Yoo S, Stremlau M, Pinto A, Woo H, Curtis O, van Praag H. Effects of Combined Anti-Hypertensive and Statin Treatment on Memory, Fear Extinction, Adult Neurogenesis, and Angiogenesis in Adult and Middle-Aged Mice. Cells 2021; 10:1778. [PMID: 34359946 PMCID: PMC8304131 DOI: 10.3390/cells10071778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 07/10/2021] [Accepted: 07/12/2021] [Indexed: 01/02/2023] Open
Abstract
Hyperlipidemia and hypertension are modifiable risk factors for cognitive decline. About 25% of adults over age 65 use both antihypertensives (AHTs) and statins to treat these conditions. Recent research in humans suggests that their combined use may delay or prevent dementia onset. However, it is not clear whether and how combination treatment may benefit brain function. To begin to address this question, we examined effects of atorvastatin, a 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitor, and Captopril, an angiotensin-converting enzyme inhibitor (ACEI), administration on memory function, anxiety-like behavior, adult hippocampal neurogenesis and angiogenesis in adult and middle-aged male C57Bl/6J mice. In adult mice (3-months-old) combination (combo) treatment, as well as administration of each compound individually, for six weeks, accelerated memory extinction in contextual fear conditioning. However, pattern separation in the touchscreen-based location discrimination test, a behavior linked to adult hippocampal neurogenesis, was unchanged. In addition, dentate gyrus (DG) neurogenesis and vascularization were unaffected. In middle-aged mice (10-months-old) combo treatment had no effect on spatial memory in the Morris water maze, but did reduce anxiety in the open field test. A potential underlying mechanism may be the modest increase in new hippocampal neurons (~20%) in the combo as compared to the control group. DG vascularization was not altered. Overall, our findings suggest that statin and anti-hypertensive treatment may serve as a potential pharmacotherapeutic approach for anxiety, in particular for post-traumatic stress disorder (PTSD) patients who have impairments in extinction of aversive memories.
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Affiliation(s)
- Seungwoo Yoo
- Stiles-Nicholson Brain Institute and Charles E. Schmidt College of Medicine, Florida Atlantic University, Jupiter, FL 33458, USA; (S.Y.); (A.P.); (H.W.); (O.C.)
| | | | - Alejandro Pinto
- Stiles-Nicholson Brain Institute and Charles E. Schmidt College of Medicine, Florida Atlantic University, Jupiter, FL 33458, USA; (S.Y.); (A.P.); (H.W.); (O.C.)
| | - Hyewon Woo
- Stiles-Nicholson Brain Institute and Charles E. Schmidt College of Medicine, Florida Atlantic University, Jupiter, FL 33458, USA; (S.Y.); (A.P.); (H.W.); (O.C.)
| | - Olivia Curtis
- Stiles-Nicholson Brain Institute and Charles E. Schmidt College of Medicine, Florida Atlantic University, Jupiter, FL 33458, USA; (S.Y.); (A.P.); (H.W.); (O.C.)
| | - Henriette van Praag
- Stiles-Nicholson Brain Institute and Charles E. Schmidt College of Medicine, Florida Atlantic University, Jupiter, FL 33458, USA; (S.Y.); (A.P.); (H.W.); (O.C.)
- National Institute on Aging (NIA), Baltimore, MD 21224, USA;
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16
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Guzman J, Aguiñaga S, Balbim GM, Lamar M, Marques IG, Marquez DX. The effects of the BAILAMOS Dance Program on hippocampal volume in older Latinos: a randomized controlled pilot study. Transl Behav Med 2021; 11:1857-1862. [PMID: 33734418 DOI: 10.1093/tbm/ibab009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Hippocampal atrophy is associated with cognitive decline. Physical activity (PA) can reverse the hippocampal loss. This study investigated the effects of the 4 month BAILAMOS dance program on hippocampal volume and self-reported PA in Latinos. Participants were randomized to the BAILAMOS dance program or waitlist control group (N = 14, n = 10 intervention, n = 4 waitlist, 67 ± 6.1 years old, 70% female). Hippocampal volumes were derived from Magnetic Resonance Imaging whole-brain T1-weighted images. Participants self-reported PA through the Community Healthy Activities Model Program for Seniors Physical Activity Questionnaire for older adults. There were no statistically significant changes in hippocampal volume preintervention to postintervention (F[1, 8] = .077, p = .79, d = .05) and no associations between PA change and hippocampal volume (F[4, 13] = .71, p = .61). However, dance participants self-reported more PA (d = .54) compared to the control. These findings demonstrate that the BAILAMOS dance program did not decrease hippocampal atrophy; however, it increased self-reported PA. Future studies should include longer and more cognitively demanding interventions to determine whether dance can reduce cognitive decline through hippocampal changes.
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Affiliation(s)
- Jacqueline Guzman
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Susan Aguiñaga
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Guilherme M Balbim
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Melissa Lamar
- Department of Behavioral Sciences, Rush Medical College, Chicago, IL 60612, USA
| | - Isabela G Marques
- Faculty of Medicine, University of Sao Paulo, Sao Paulo, SP 01246903, Brazil
| | - David X Marquez
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612, USA
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17
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Kern KL, Storer TW, Schon K. Cardiorespiratory fitness, hippocampal subfield volumes, and mnemonic discrimination task performance in aging. Hum Brain Mapp 2020; 42:871-892. [PMID: 33325614 PMCID: PMC7856657 DOI: 10.1002/hbm.25259] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/03/2020] [Accepted: 10/12/2020] [Indexed: 12/14/2022] Open
Abstract
Aging and exercise have opposing effects on mnemonic discrimination task performance, which putatively taxes pattern separation mechanisms reliant on the dentate gyrus (DG) subfield of the hippocampus. In young adults, increasing cardiorespiratory fitness (CRF) has been shown to improve mnemonic discrimination task performance and increase left anterior DG/CA3 volume. It is unknown how these variables interact in cognitive aging, yet this knowledge is critical, given the established effects of aging on hippocampal plasticity. To investigate these relationships, 65 older adults (aged 55–85 years) completed a submaximal treadmill test to estimate CRF, a mnemonic discrimination task, and a high‐resolution MRI scan to determine hippocampal subfield volumes. Our older adult sample demonstrated the lowest task accuracy in the condition with the greatest stimuli similarity and left DG/CA3 body volume significantly predicted accuracy in this condition. Our results did not provide support for relationships between CRF and task accuracy or CRF and DG/CA3 volume as evidenced in studies of young adults. Instead, CRF predicted bilateral subiculum volume in older adult women, not men. Altogether, these findings provide further support for a role of the DG in behavioral pattern separation in humans and suggest that CRF may have differential effects on hippocampal subfield integrity in older adult men and women. ClinicalTrials.gov identifiers: (a) Neuroimaging Study of Exercise and Memory Function, NCT02057354; (b) The Entorhinal Cortex and Aerobic Exercise in Aging, NCT02775760; (c) Physical Activity and Cognition Study, NCT02773121.
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Affiliation(s)
- Kathryn L Kern
- Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, Massachusetts, USA.,Center for Systems Neuroscience, Boston University, Boston, Massachusetts, USA
| | - Thomas W Storer
- Men's Health, Aging, and Metabolism Unit, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Karin Schon
- Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, Massachusetts, USA.,Center for Systems Neuroscience, Boston University, Boston, Massachusetts, USA.,Department of Psychological and Brain Sciences, Boston University, Boston, Massachusetts, USA.,Center for Memory and Brain, Boston University, Boston, Massachusetts, USA
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18
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Post-learning micro- and macro-structural neuroplasticity changes with time and sleep. Biochem Pharmacol 2020; 191:114369. [PMID: 33338474 DOI: 10.1016/j.bcp.2020.114369] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/10/2020] [Accepted: 12/11/2020] [Indexed: 12/18/2022]
Abstract
Neuroplasticity refers to the fact that our brain can partially modify both structure and function to adequately respond to novel environmental stimulations. Neuroplasticity mechanisms are not only operating during the acquisition of novel information (i.e., online) but also during the offline periods that take place after the end of the actual learning episode. Structural brain changes as a consequence of learning have been consistently demonstrated on the long term using non-invasive neuroimaging methods, but short-term changes remained more elusive. Fortunately, the swift development of advanced MR methods over the last decade now allows tracking fine-grained cerebral changes on short timescales beyond gross volumetric modifications stretching over several days or weeks. Besides a mere effect of time, post-learning sleep mechanisms have been shown to play an important role in memory consolidation and promote long-lasting changes in neural networks. Sleep was shown to contribute to structural modifications over weeks of prolonged training, but studies evidencing more rapid post-training sleep structural effects linked to memory consolidation are still scarce in human. On the other hand, animal studies convincingly show how sleep might modulate synaptic microstructure. We aim here at reviewing the literature establishing a link between different types of training/learning and the resulting structural changes, with an emphasis on the role of post-training sleep and time in tuning these modifications. Open questions are raised such as the role of post-learning sleep in macrostructural changes, the links between different MR structural measurement-related modifications and the underlying microstructural brain processes, and bidirectional influences between structural and functional brain changes.
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19
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Gardner JC, Dvoretskiy SV, Yang Y, Venkataraman S, Lange DA, Li S, Boppart AL, Kim N, Rendeiro C, Boppart MD, Rhodes JS. Electrically stimulated hind limb muscle contractions increase adult hippocampal astrogliogenesis but not neurogenesis or behavioral performance in male C57BL/6J mice. Sci Rep 2020; 10:19319. [PMID: 33168868 PMCID: PMC7652861 DOI: 10.1038/s41598-020-76356-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 10/19/2020] [Indexed: 12/11/2022] Open
Abstract
Regular exercise is crucial for maintaining cognitive health throughout life. Recent evidence suggests muscle contractions during exercise release factors into the blood which cross into the brain and stimulate adult hippocampal neurogenesis. However, no study has tested whether muscle contractions alone are sufficient to increase adult hippocampal neurogenesis and improve behavioral performance. Adult male, C57BL/6J mice were anesthetized and exposed to bilateral hind limb muscle contractions (both concentric and eccentric) via electrical stimulation (e-stim) of the sciatic nerve twice a week for 8 weeks. Each session lasted approximately 20 min and consisted of a total of 40 muscle contractions. The control group was treated similarly except without e-stim (sham). Acute neuronal activation of the dentate gyrus (DG) using cFos immunohistochemistry was measured as a negative control to confirm that the muscle contractions did not activate the hippocampus, and in agreement, no DG activation was observed. Relative to sham, e-stim training increased DG volume by approximately 10% and astrogliogenesis by 75%, but no difference in neurogenesis was detected and no improvement in behavioral performance was observed. E-stim also increased astrogliogenesis in CA1/CA2 hippocampal subfields but not in the cortex. Results demonstrate that muscle contractions alone, in absence of DG activation, are sufficient to increase adult hippocampal astrogliogenesis, but not neurogenesis or behavioral performance in mice.
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Affiliation(s)
- Jennie C Gardner
- Department of Psychology, University of Illinois at Urbana-Champaign, Champaign, USA.,Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL, 61801, USA
| | - Svyatoslav V Dvoretskiy
- Department of Kinesiology and Community Health, University of Illinois at Urbana Champaign, Champaign, USA.,Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL, 61801, USA
| | - Yanyu Yang
- Department of Psychology, University of Illinois at Urbana-Champaign, Champaign, USA.,Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL, 61801, USA
| | - Sanjana Venkataraman
- Department of Psychology, University of Illinois at Urbana-Champaign, Champaign, USA.,Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL, 61801, USA
| | - Dominica A Lange
- Department of Psychology, University of Illinois at Urbana-Champaign, Champaign, USA.,Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL, 61801, USA
| | - Shiping Li
- Department of Psychology, University of Illinois at Urbana-Champaign, Champaign, USA.,Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL, 61801, USA
| | - Alexandria L Boppart
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL, 61801, USA
| | - Noah Kim
- Department of Kinesiology and Community Health, University of Illinois at Urbana Champaign, Champaign, USA.,Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL, 61801, USA
| | - Catarina Rendeiro
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL, 61801, USA.,School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, UK
| | - Marni D Boppart
- Department of Kinesiology and Community Health, University of Illinois at Urbana Champaign, Champaign, USA.,Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL, 61801, USA
| | - Justin S Rhodes
- Department of Psychology, University of Illinois at Urbana-Champaign, Champaign, USA. .,Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL, 61801, USA.
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20
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Aerobic exercise increases sprouting angiogenesis in the male rat motor cortex. Brain Struct Funct 2020; 225:2301-2314. [PMID: 32918614 DOI: 10.1007/s00429-020-02100-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 06/10/2020] [Indexed: 12/14/2022]
Abstract
Exercise is beneficial to brain health, and historically, the advantageous effects of exercise on the brain have been attributed to neuronal plasticity. However, it has also become clear that the brain vascular system also exhibits plasticity in response to exercise. This plasticity occurs in areas involved in movement, such as the motor cortex. This experiment aimed to further characterize the effects of exercise on structural vascular plasticity in the male rat motor cortex, by specifically identifying whether features of angiogenesis, the growth of new capillaries, or changes in vessel diameter were present. Male rats in the exercise group engaged in a 5-week bout of voluntary wheel running, while a second group of rats remained sedentary. After the exercise regimen, vascular corrosion casts, resin replicas of the brain vasculature, were made for all animals and imaged using a scanning electron microscope. Results indicate sprouting angiogenesis was the primary form of structural vascular plasticity detected in the motor cortex under these aerobic exercise parameters. Additionally, exercised rats displayed a slight increase in capillary diameter and expanded endothelial cell nuclei diameters in this region.
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21
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Bettio LEB, Thacker JS, Rodgers SP, Brocardo PS, Christie BR, Gil-Mohapel J. Interplay between hormones and exercise on hippocampal plasticity across the lifespan. Biochim Biophys Acta Mol Basis Dis 2020; 1866:165821. [PMID: 32376385 DOI: 10.1016/j.bbadis.2020.165821] [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: 11/20/2019] [Revised: 04/19/2020] [Accepted: 04/25/2020] [Indexed: 12/15/2022]
Abstract
The hippocampus is a brain structure known to play a central role in cognitive function (namely learning and memory) as well as mood regulation and affective behaviors due in part to its ability to undergo structural and functional changes in response to intrinsic and extrinsic stimuli. While structural changes are achieved through modulation of hippocampal neurogenesis as well as alterations in dendritic morphology and spine remodeling, functional (i.e., synaptic) changes can be noted through the strengthening (i.e., long-term potentiation) or weakening (i.e., long-term depression) of the synapses. While age, hormone homeostasis, and levels of physical activity are some of the factors known to module these forms of hippocampal plasticity, the exact mechanisms through which these factors interact with each other at a given moment in time are not completely understood. It is well known that hormonal levels vary throughout the lifespan of an individual and it is also known that physical exercise can impact hormonal homeostasis. Thus, it is reasonable to speculate that hormone modulation might be one of the various mechanisms through which physical exercise differently impacts hippocampal plasticity throughout distinct periods of an individual's life. The present review summarizes the potential relationship between physical exercise and different types of hormones (namely sex, metabolic, and stress hormones) and how this relationship may mediate the effects of physical activity during three distinct life periods, adolescence, adulthood, and senescence. Overall, the vast majority of studies support a beneficial role of exercise in maintaining hippocampal hormonal levels and consequently, hippocampal plasticity, cognition, and mood regulation.
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Affiliation(s)
- Luis E B Bettio
- Division of Medical Sciences and Neuroscience Graduate Program, University of Victoria, Victoria, BC, Canada
| | - Jonathan S Thacker
- Division of Medical Sciences and Neuroscience Graduate Program, University of Victoria, Victoria, BC, Canada
| | - Shaefali P Rodgers
- Developmental, Cognitive & Behavioral Neuroscience Program, Department of Psychology, Texas Institute for Measurement, Evaluation, and Statistics, University of Houston, TX, USA
| | - Patricia S Brocardo
- Department of Morphological Sciences, Centre of Biological Sciences, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Brian R Christie
- Division of Medical Sciences and Neuroscience Graduate Program, University of Victoria, Victoria, BC, Canada; Island Medical Program, Faculty of Medicine, University of British Columbia, Victoria, BC, Canada
| | - Joana Gil-Mohapel
- Division of Medical Sciences and Neuroscience Graduate Program, University of Victoria, Victoria, BC, Canada; Island Medical Program, Faculty of Medicine, University of British Columbia, Victoria, BC, Canada.
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22
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Li L, Zhang J, Cao M, Hu W, Zhou T, Huang T, Chen P, Quan M. The effects of chronic physical activity interventions on executive functions in children aged 3-7 years: A meta-analysis. J Sci Med Sport 2020; 23:949-954. [PMID: 32360243 DOI: 10.1016/j.jsams.2020.03.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 02/21/2020] [Accepted: 03/09/2020] [Indexed: 01/02/2023]
Abstract
OBJECTIVES To use a quantitative approach to examine the effects of chronic physical activity (PA) interventions on executive functions (EFs) in children aged 3-7 years. DESIGN Systematic review and meta-analysis. METHODS PubMed, EMBASE, Cochrane Central Register of Controlled Trials, PsycINFO, and the China National Knowledge Infrastructure were searched from their inception to December 2019. Intervention studies with a control group that examined the effects of chronic PA interventions on EFs among children aged 3-7 years were included in this meta-analysis. Lastly, subgroup analyses were conducted to examine the potential modifying effects of chronic PA intervention's characteristics and study quality. RESULTS A total of 10 studies were included in this meta-analysis with a total of 716 participants. The fixed-effects model was used to estimate the pooled effect sizes since heterogeneity across included studies was not significant. The summary effects revealed that chronic PA interventions have a small but positive effects on participants' overall EFs [standardized mean difference (SMD) = 0.35, 95% CI: 0.20-0.50] as well as inhibition (SMD = 0.37, 95% CI: 0.12-0.62) and working memory (SMD = 0.24, 95% CI: 0.02-0.46) domains and a moderate effect on the cognitive flexibility domain (SMD = 0.66, 95% CI: 0.28-1.05). Lastly, the pooled effect was not significantly modified by intervention duration, session length, or frequency. CONCLUSIONS Chronic PA interventions, especially PA plus cognitive challenges interventions, may be a promising way to promote the development of multiple aspects of EFs in children aged 3-7 years.
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Affiliation(s)
- Longkai Li
- School of Kinesiology, Shanghai University of Sport, China
| | - Jinming Zhang
- College of Sport Medicine and Rehabilitation, Shandong First Medical University & Shandong Academy of Medical Sciences, China
| | - Meng Cao
- School of Physical Education and Sports Training, Shanghai University of Sport, China
| | - Wenwen Hu
- School of Kinesiology, Shanghai University of Sport, China
| | - Tang Zhou
- School of Kinesiology, Shanghai University of Sport, China
| | - Tao Huang
- Department of Physical Education, Shanghai Jiao Tong University, China
| | - Peijie Chen
- School of Kinesiology, Shanghai University of Sport, China.
| | - Minghui Quan
- School of Kinesiology, Shanghai University of Sport, China.
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23
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Maclaine KD, Stebbings KA, Llano DA, Rhodes JS. Voluntary wheel running has no impact on brain and liver mitochondrial DNA copy number or mutation measures in the PolG mouse model of aging. PLoS One 2020; 15:e0226860. [PMID: 32119683 PMCID: PMC7051064 DOI: 10.1371/journal.pone.0226860] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 02/13/2020] [Indexed: 12/27/2022] Open
Abstract
The mitochondrial theory of aging attributes much of the aging process to mitochondrial DNA damage. The polymerase gamma (PolG) mutant mouse was designed to evaluate this theory and thus carries a mutated proofreading region of polymerase gamma (D257A) that exclusively transcribes the mitochondrial genome. As a result, PolGD257A mice accumulate mitochondrial DNA (mtDNA) mutations that lead to premature aging, as evidenced by hair loss, weight loss, kyphosis, increased rates of apoptosis, organ damage, and an early death, occurring around 12 months of age. Research has shown that exercise decreases skeletal muscle mtDNA mutations and normalizes protein levels in PolG mice. However, brain mtDNA changes with exercise in PolG mice have not been studied. We found no effects of exercise on mtDNA mutations or copy number in either the brain or liver of PolG mice, despite changes to body mass. Our results suggest that mitochondrial mutations play little role in exercise-brain interactions in the PolG model of accelerated aging. In addition to evaluating the effect of exercise on mtDNA outcomes, we also implemented novel methods for both extracting mtDNA and measuring mtDNA mutations, with aims for improving the efficiency and accuracy of these methods.
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MESH Headings
- Aging, Premature/genetics
- Aging, Premature/pathology
- Aging, Premature/physiopathology
- Aging, Premature/prevention & control
- Animals
- Brain/cytology
- Brain/metabolism
- Brain/pathology
- DNA Copy Number Variations
- DNA Damage/physiology
- DNA Polymerase gamma/genetics
- DNA Polymerase gamma/metabolism
- DNA, Mitochondrial/genetics
- DNA, Mitochondrial/isolation & purification
- DNA, Mitochondrial/metabolism
- Disease Models, Animal
- Humans
- Liver/cytology
- Liver/metabolism
- Liver/pathology
- Male
- Mice
- Mice, Transgenic
- Muscle, Skeletal/cytology
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/pathology
- Mutation
- Physical Conditioning, Animal/physiology
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Affiliation(s)
- Kendra D. Maclaine
- Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Kevin A. Stebbings
- Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
- Neuroscience Program, Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Daniel A. Llano
- Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
- Neuroscience Program, Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Justin S. Rhodes
- Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
- Neuroscience Program, Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
- Department of Psychology, University of Illinois at Urbana-Champaign, Champaign, Illinois, United States of America
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24
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Stevenson ME, Kay JJM, Atry F, Wickstrom AT, Krueger JR, Pashaie RE, Swain RA. Wheel running for 26 weeks is associated with sustained vascular plasticity in the rat motor cortex. Behav Brain Res 2020; 380:112447. [PMID: 31870777 DOI: 10.1016/j.bbr.2019.112447] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 12/17/2019] [Accepted: 12/19/2019] [Indexed: 10/25/2022]
Abstract
Vascular pathologies represent the leading causes of mortality worldwide. The nervous system has evolved mechanisms to compensate for the cerebral hypoxia caused by many of these conditions. Vessel dilation and growth of new vessels are two prominent responses to hypoxia, both of which play a critical role in maintaining cerebral homeostasis. One way to facilitate cerebrovascular plasticity, and develop neuroprotection against vascular pathologies, is through aerobic exercise. The present study explored the long-term consequences of aerobic exercise on vascular structure and function in the motor cortex. Rats were assigned to a sedentary condition or were provided access to running wheels for 26 weeks. Rats were then anesthetized, and angiograms were captured using spectral domain optical coherence tomography (SD-OCT) to explore cerebrovascular reactivity in response to altered oxygen and carbon dioxide status. Following this procedure, all rats were euthanized, and unbiased stereological quantification of blood vessel density was collected from sections of the primary motor cortex infused with India ink. Results demonstrated that chronic exercise increased capillary and arteriole surface area densities and enhanced arteriole reactivity in response to hypercapnia-hypoxia, as displayed by increased vasodilation within the motor cortex of exercised animals.
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Affiliation(s)
- Morgan E Stevenson
- Department of Psychology, University of Wisconsin-Milwaukee, United States
| | - Jacob J M Kay
- Department of Psychology, University of Wisconsin-Milwaukee, United States
| | - Farid Atry
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, United States
| | | | | | - Ramin E Pashaie
- Department of Electrical Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI, United States
| | - Rodney A Swain
- Department of Psychology, University of Wisconsin-Milwaukee, United States.
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25
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Exercise-Induced Adaptations to the Mouse Striatal Adenosine System. Neural Plast 2020; 2020:5859098. [PMID: 32399024 PMCID: PMC7204111 DOI: 10.1155/2020/5859098] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 12/18/2019] [Accepted: 12/27/2019] [Indexed: 12/13/2022] Open
Abstract
Adenosine acts as a key regulator of striatum activity, in part, through the antagonistic modulation of dopamine activity. Exercise can increase adenosine activity in the brain, which may impair dopaminergic functions in the striatum. Therefore, long-term repeated bouts of exercise may subsequently generate plasticity in striatal adenosine systems in a manner that promotes dopaminergic activity. This study investigated the effects of long-term voluntary wheel running on adenosine 1 (A1R), adenosine 2A (A2AR), dopamine 1 (D1R), and dopamine 2 (D2R) receptor protein expression in adult mouse dorsal and ventral striatum structures using immunohistochemistry. In addition, equilibrative nucleoside transporter 1 (ENT1) protein expression was examined after wheel running, as ENT1 regulates the bidirectional flux of adenosine between intra- and extracellular space. The results suggest that eight weeks of running wheel access spared age-related increases of A1R and A2AR protein concentrations across the dorsal and ventral striatal structures. Wheel running mildly reduced ENT1 protein levels in ventral striatum subregions. Moreover, wheel running mildly increased D2R protein density within striatal subregions in the dorsal medial striatum, nucleus accumbens core, and the nucleus accumbens shell. However, D1R protein expression in the striatum was unchanged by wheel running. These data suggest that exercise promotes adaptations to striatal adenosine systems. Exercise-reduced A1R and A2AR and exercise-increased D2R protein levels may contribute to improved dopaminergic signaling in the striatum. These findings may have implications for cognitive and behavioral processes, as well as motor and psychiatric diseases that involve the striatum.
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26
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Kujach S, Olek RA, Byun K, Suwabe K, Sitek EJ, Ziemann E, Laskowski R, Soya H. Acute Sprint Interval Exercise Increases Both Cognitive Functions and Peripheral Neurotrophic Factors in Humans: The Possible Involvement of Lactate. Front Neurosci 2020; 13:1455. [PMID: 32038149 PMCID: PMC6989590 DOI: 10.3389/fnins.2019.01455] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 12/31/2019] [Indexed: 12/18/2022] Open
Abstract
There is increasing attention to sprint interval exercise (SIE) training as a time-efficient exercise regime. Recent studies, including our own (Kujach et al., 2018), have shown that acute high-intensity intermittent exercise can improve cognitive function; however, the neurobiological mechanisms underlying the effect still remain unknown. We thus examined the effects of acute SIE on cognitive function by monitoring the peripheral levels of growth and neurotrophic factors as well as blood lactate (LA) as potential mechanisms. Thirty-six young males participated in the current study and were divided into two groups: SIE (n = 20; mean age: 21.0 ± 0.9 years) and resting control (CTR) (n = 16; mean age: 21.7 ± 1.3 years). The SIE session consisted of 5 min of warm-up exercise and six sets of 30 s of all-out cycling exercise followed by 4.5 min of rest on a cycling-ergometer. Blood samples to evaluate the changes of serum concentrations of brain-derived neurotrophic factor (BDNF), insulin-like growth factor-1 (IGF-1), vascular endothelial growth factor (VEGF), and blood LA were obtained at three time points: before, immediately after, and 60 min after each session. A Stroop task (ST) and trail making test (TMT) parts A and B were used to assess cognitive functions. Acute SIE shortened response times for both the ST and TMT A and B. Meanwhile, the peripheral levels of BDNF, IGF-1, and VEGF were significantly increased after an acute bout of SIE compared to those in CTR. In response to acute SIE, blood LA levels significantly increased and correlated with increased levels of BDNF, IGF-1, and VEGF. Furthermore, cognitive function and BDNF are found to be correlated. The current results suggest that SIE could have beneficial effects on cognitive functions with increased neuroprotective factors along with peripheral LA concentration in humans.
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Affiliation(s)
- Sylwester Kujach
- Department of Physiology, Faculty of Physical Education, Gdansk University of Physical Education and Sport, Gdańsk, Poland.,Department of Athletics, Strength and Conditioning, Poznań University of Physical Education, Poznań, Poland
| | - Robert Antoni Olek
- Department of Athletics, Strength and Conditioning, Poznań University of Physical Education, Poznań, Poland
| | - Kyeongho Byun
- Sports Neuroscience Division, Advanced Research Initiative for Human High Performance, Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba, Japan.,Division of Sport Science, Incheon National University, Incheon, South Korea
| | - Kazuya Suwabe
- Sports Neuroscience Division, Advanced Research Initiative for Human High Performance, Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba, Japan
| | - Emilia J Sitek
- Neurological and Psychiatric Nursing Department, Faculty of Health Sciences, Medical University of Gdańsk, Gdańsk, Poland.,Neurology Department, St. Adalbert's Hospital, Poznań, Poland
| | - Ewa Ziemann
- Department of Athletics, Strength and Conditioning, Poznań University of Physical Education, Poznań, Poland
| | - Radosław Laskowski
- Department of Physiology, Faculty of Physical Education, Gdansk University of Physical Education and Sport, Gdańsk, Poland
| | - Hideaki Soya
- Sports Neuroscience Division, Advanced Research Initiative for Human High Performance, Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba, Japan.,Laboratory of Exercise Biochemistry and Neuroendocrinology, Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba, Japan
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27
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Bogorad MI, DeStefano JG, Linville RM, Wong AD, Searson PC. Cerebrovascular plasticity: Processes that lead to changes in the architecture of brain microvessels. J Cereb Blood Flow Metab 2019; 39:1413-1432. [PMID: 31208241 PMCID: PMC6681538 DOI: 10.1177/0271678x19855875] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The metabolic demands of the brain are met by oxygen and glucose, supplied by a complex hierarchical network of microvessels (arterioles, capillaries, and venules). Transient changes in neural activity are accommodated by local dilation of arterioles or capillaries to increase cerebral blood flow and hence nutrient availability. Transport and communication between the circulation and the brain is regulated by the brain microvascular endothelial cells that form the blood-brain barrier. Under homeostatic conditions, there is very little turnover in brain microvascular endothelial cells, and the cerebrovascular architecture is largely static. However, changes in the brain microenvironment, due to environmental factors, disease, or trauma, can result in additive or subtractive changes in cerebrovascular architecture. Additions occur by angiogenesis or vasculogenesis, whereas subtractions occur by vascular pruning, injury, or endothelial cell death. Here we review the various processes that lead to changes in the cerebrovascular architecture, including sustained changes in the brain microenvironment, development and aging, and injury, disease, and repair.
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Affiliation(s)
- Max I Bogorad
- 1 Institute for Nanobiotechnology, Johns Hopkins University, Baltimore, MD, USA.,2 Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Jackson G DeStefano
- 1 Institute for Nanobiotechnology, Johns Hopkins University, Baltimore, MD, USA.,2 Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Raleigh M Linville
- 1 Institute for Nanobiotechnology, Johns Hopkins University, Baltimore, MD, USA.,3 Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Andrew D Wong
- 1 Institute for Nanobiotechnology, Johns Hopkins University, Baltimore, MD, USA.,2 Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Peter C Searson
- 1 Institute for Nanobiotechnology, Johns Hopkins University, Baltimore, MD, USA.,2 Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, USA.,3 Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
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28
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Algaidi SA, Eldomiaty MA, Elbastwisy YM, Almasry SM, Desouky MK, Elnaggar AM. Effect of voluntary running on expression of myokines in brains of rats with depression. Int J Immunopathol Pharmacol 2019; 33:2058738419833533. [PMID: 30834799 PMCID: PMC6407323 DOI: 10.1177/2058738419833533] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
This study aimed to demonstrate the histopathology and immunoexpression of exercise-derived myokines in dentate gyrus (DG), medial prefrontal cortex (mPFC) and cerebellum of depressed Wistar rats during depression and after practising voluntary running. Depression was developed by forced swimming for 2 weeks. Voluntary running was performed by voluntary running for 3 weeks. Brain sections were processed and immunostained to detect brain-derived neurotrophic factor (BDNF), macrophage migration inhibitory factor (MIF), vascular endothelial growth factor (VEGF) and interleukin-6 (IL-6). ImageJ software was used to measure the optical density (OD). BDNF was expressed in neurons in DG, mPFC and granular and Purkinje cells in cerebellum. MIF was expressed in neurons of sub-granular zone in DG, mPFC and Purkinje cells. VEGF was expressed in many neurons in DG, mPFC and Purkinje cells. IL-6 was expressed in some neurons in DG, in neuropil of mPFC and in Purkinje cells. In depression, the OD of studied myokines significantly decreased in all examined areas. After voluntary running, the OD of myokines significantly increased in all areas. This study defines the immunohistochemical expression of myokines in brain areas in depression and after voluntary running and reveals the involvement of the mPFC and cerebellum in the pathophysiology of depression.
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Affiliation(s)
- Sami A Algaidi
- 1 Department of Anatomy, Faculty of Medicine, Taibah University, Almadinah Almunawarah, Saudi Arabia
| | - Magda A Eldomiaty
- 1 Department of Anatomy, Faculty of Medicine, Taibah University, Almadinah Almunawarah, Saudi Arabia.,2 Department of Anatomy, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Yasser M Elbastwisy
- 1 Department of Anatomy, Faculty of Medicine, Taibah University, Almadinah Almunawarah, Saudi Arabia.,3 Department of Anatomy, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Shaima M Almasry
- 1 Department of Anatomy, Faculty of Medicine, Taibah University, Almadinah Almunawarah, Saudi Arabia.,3 Department of Anatomy, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Maha K Desouky
- 1 Department of Anatomy, Faculty of Medicine, Taibah University, Almadinah Almunawarah, Saudi Arabia.,4 Department of Anatomy, Faculty of Medicine, Minia University, Minia, Egypt
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29
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Wu C, Yang L, Tucker D, Dong Y, Zhu L, Duan R, Liu TCY, Zhang Q. Beneficial Effects of Exercise Pretreatment in a Sporadic Alzheimer's Rat Model. Med Sci Sports Exerc 2019; 50:945-956. [PMID: 29232315 DOI: 10.1249/mss.0000000000001519] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PURPOSE This study aimed to examine the effects of swimming exercise pretreatment on a streptozotocin (STZ)-induced sporadic Alzheimer's disease (AD) rat model and provide an initial understanding of related molecular mechanisms. METHODS Male 2.5-month-old Sprague-Dawley rats were divided into the following four groups: (a) control, (b) swim + vehicle, (c) STZ without swim, and (d) swim + STZ. The Barnes maze task and novel object recognition test were used to measure hippocampus-dependent spatial learning and working memory, respectively. Immunofluorescence staining, Western blot analysis, enzyme-linked immunosorbent assay (ELISA) analysis, and related assay kits were used to assess synaptic proteins, inflammatory cytokines, total antioxidant capacity, antioxidant enzymes, amyloid-beta production, and tau hyperphosphorylation. RESULTS Behavioral tests revealed that exercise pretreatment could significantly inhibit STZ-induced cognitive dysfunction (P < 0.05). STZ animals displayed significant loss of presynaptic/postsynaptic markers in the hippocampal CA1 that was reversed by exercise pretreatment (P < 0.05). STZ rats also displayed increased reactive gliosis, release of proinflammatory cytokines, and oxidative damage, effects attenuated by preexercise (P < 0.05, between-treatment changes). Likewise, preexercise significantly induced protein expression (P < 0.001) and DNA-binding activity (P = 0.015) of Nrf2 and downstream antioxidant gene expression in the hippocampal CA1 region (P < 0.05). STZ rats had increased levels of amyloid-beta (1-42) and tau hyperphosphorylation that were significantly ameliorated by exercise (P < 0.05). Histological studies showed that exercise imparted substantial neuroprotection (P < 0.001), suppressing neuronal apoptosis-like cell death in the hippocampal CA1 compared with the STZ control group (P < 0.001). CONCLUSIONS Exercise pretraining exerts multifactorial benefits on AD that support its use as a promising new therapeutic option for prevention of neurodegeneration in the elderly and/or AD population.
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Affiliation(s)
- Chongyun Wu
- Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, University Town, Guangzhou, CHINA
| | - Luodan Yang
- Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, University Town, Guangzhou, CHINA
| | - Donovan Tucker
- Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, University Town, Guangzhou, CHINA
| | - Yan Dong
- Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, University Town, Guangzhou, CHINA
| | - Ling Zhu
- Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, University Town, Guangzhou, CHINA
| | - Rui Duan
- Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, University Town, Guangzhou, CHINA
| | - Timon Cheng-Yi Liu
- Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, University Town, Guangzhou, CHINA
| | - Quanguang Zhang
- Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, University Town, Guangzhou, CHINA.,Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, University Town, Guangzhou, CHINA
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30
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Nilsson MI, Bourgeois JM, Nederveen JP, Leite MR, Hettinga BP, Bujak AL, May L, Lin E, Crozier M, Rusiecki DR, Moffatt C, Azzopardi P, Young J, Yang Y, Nguyen J, Adler E, Lan L, Tarnopolsky MA. Lifelong aerobic exercise protects against inflammaging and cancer. PLoS One 2019; 14:e0210863. [PMID: 30682077 PMCID: PMC6347267 DOI: 10.1371/journal.pone.0210863] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Accepted: 01/03/2019] [Indexed: 12/16/2022] Open
Abstract
Biological aging is associated with progressive damage accumulation, loss of organ reserves, and systemic inflammation ('inflammaging'), which predispose for a wide spectrum of chronic diseases, including several types of cancer. In contrast, aerobic exercise training (AET) reduces inflammation, lowers all-cause mortality, and enhances both health and lifespan. In this study, we examined the benefits of early-onset, lifelong AET on predictors of health, inflammation, and cancer incidence in a naturally aging mouse model (C57BL/J6). Lifelong, voluntary wheel-running (O-AET; 26-month-old) prevented age-related declines in aerobic fitness and motor coordination vs. age-matched, sedentary controls (O-SED). AET also provided partial protection against sarcopenia, dynapenia, testicular atrophy, and overall organ pathology, hence augmenting the 'physiologic reserve' of lifelong runners. Systemic inflammation, as evidenced by a chronic elevation in 17 of 18 pro- and anti-inflammatory cytokines and chemokines (P < 0.05 O-SED vs. 2-month-old Y-CON), was potently mitigated by lifelong AET (P < 0.05 O-AET vs. O-SED), including master regulators of the cytokine cascade and cancer progression (IL-1β, TNF-α, and IL-6). In addition, circulating SPARC, previously known to be upregulated in metabolic disease, was elevated in old, sedentary mice, but was normalized to young control levels in lifelong runners. Remarkably, malignant tumours were also completely absent in the O-AET group, whereas they were present in the brain (pituitary), liver, spleen, and intestines of sedentary mice. Collectively, our results indicate that early-onset, lifelong running dampens inflammaging, protects against multiple cancer types, and extends healthspan of naturally-aged mice.
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Affiliation(s)
- Mats I. Nilsson
- Department of Pathology and Molecular Medicine, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
- Exerkine Corporation, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Jacqueline M. Bourgeois
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Joshua P. Nederveen
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Marlon R. Leite
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Bart P. Hettinga
- Exerkine Corporation, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Adam L. Bujak
- Exerkine Corporation, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Linda May
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Ethan Lin
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Michael Crozier
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Daniel R. Rusiecki
- Exerkine Corporation, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Chris Moffatt
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Paul Azzopardi
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Jacob Young
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Yifan Yang
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Jenny Nguyen
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Ethan Adler
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Lucy Lan
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Mark A. Tarnopolsky
- Exerkine Corporation, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
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31
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Chaddock-Heyman L, Erickson KI, Kienzler C, Drollette ES, Raine LB, Kao SC, Bensken J, Weisshappel R, Castelli DM, Hillman CH, Kramer AF. Physical Activity Increases White Matter Microstructure in Children. Front Neurosci 2018; 12:950. [PMID: 30618578 PMCID: PMC6305717 DOI: 10.3389/fnins.2018.00950] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 11/30/2018] [Indexed: 02/04/2023] Open
Abstract
Children are becoming increasingly inactive, unfit, and overweight, yet there is relatively little causal evidence regarding the effects of physical activity on brain health during childhood. The present study examined the effects of an after-school physical activity program (FITKids2) on the microstructure of white matter tracts in 7- to 9-year-old children. We measured the microstructural properties of white matter via diffusion tensor imaging in 143 children before and after random assignment to either a 9-month after-school physical activity program (N = 76, mean age = 8.7 years) or a wait list control group (N = 67, mean age = 8.7 years). Our results demonstrate that children who participated in the physical activity program showed increased white matter microstructure in the genu of the corpus callosum, with no changes in white matter microstructure in the wait list control group which reflects typical development. Specifically, children in the physical activity program showed increases in fractional anisotropy (FA) and decreases in radial diffusivity (RD) in the genu from pre- to post-test, thereby suggesting more tightly bundled and structurally compact fibers (FA) and increased myelination (RD), with no changes in estimates of axonal fiber diameter (axial diffusivity, AD). The corpus callosum integrates cognitive, motor, and sensory information between the left and right hemispheres of the brain, and the white matter tract plays a role in cognition and behavior. Our findings reinforce the importance of physical activity for brain health during child development.
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Affiliation(s)
- Laura Chaddock-Heyman
- Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Kirk I. Erickson
- Department of Psychology, University of Pittsburgh, Pittsburgh, PA, United States
| | - Caitlin Kienzler
- Department of Psychology, University of Colorado, Denver, CO, United States
| | - Eric S. Drollette
- Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, NC, United States
| | - Lauren B. Raine
- Department of Psychology, Northeastern University, Boston, MA, United States
| | - Shih-Chun Kao
- Department of Psychology, Northeastern University, Boston, MA, United States
| | - Jeanine Bensken
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Robert Weisshappel
- Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Darla M. Castelli
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, TX, United States
| | - Charles H. Hillman
- Department of Psychology, Northeastern University, Boston, MA, United States
- Department of Physical Therapy, Movement, & Rehabilitation Sciences, Northeastern University, Boston, MA, United States
| | - Arthur F. Kramer
- Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL, United States
- Department of Psychology, Northeastern University, Boston, MA, United States
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32
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Baptista P, Andrade JP. Adult Hippocampal Neurogenesis: Regulation and Possible Functional and Clinical Correlates. Front Neuroanat 2018; 12:44. [PMID: 29922131 PMCID: PMC5996050 DOI: 10.3389/fnana.2018.00044] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Accepted: 05/11/2018] [Indexed: 01/19/2023] Open
Abstract
The formation of new neurons in the adult central nervous system (CNS) has been recognized as one of the major findings in neuroanatomical research. The hippocampal formation (HF), one of the main targets of these investigations, holds a neurogenic niche widely recognized among several mammalian species and whose existence in the human brain has sparked controversy and extensive debate. Many cellular features from this region emphasize that hippocampal neurogenesis suffers changes with normal aging and, among regulatory factors, physical exercise and chronic stress provoke opposite effects on cell proliferation, maturation and survival. Considering the numerous functions attributable to the HF, increasing or decreasing the integration of new neurons in the delicate neuronal network might be significant for modulation of cognition and emotion. The role that immature and mature adult-born neurons play in this circuitry is still mostly unknown but it could prove fundamental to understand hippocampal-dependent cognitive processes, the pathophysiology of depression, and the therapeutic effects of antidepressant medication in modulating behavior and mental health.
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Affiliation(s)
- Pedro Baptista
- Unit of Anatomy, Department of Biomedicine, Faculty of Medicine of University of Porto, Porto, Portugal
| | - José P Andrade
- Unit of Anatomy, Department of Biomedicine, Faculty of Medicine of University of Porto, Porto, Portugal.,Center of Health Technology and Services Research (CINTESIS), Faculty of Medicine of University of Porto, Porto, Portugal
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Rendeiro C, Rhodes JS. A new perspective of the hippocampus in the origin of exercise-brain interactions. Brain Struct Funct 2018; 223:2527-2545. [PMID: 29671055 DOI: 10.1007/s00429-018-1665-6] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 04/10/2018] [Indexed: 12/17/2022]
Abstract
Exercising regularly is a highly effective strategy for maintaining cognitive health throughout the lifespan. Over the last 20 years, many molecular, physiological and structural changes have been documented in response to aerobic exercise training in humans and animals, particularly in the hippocampus. However, how exercise produces such neurological changes remains elusive. A recent line of investigation has suggested that muscle-derived circulating factors cross into the brain and may be the key agents driving enhancement in synaptic plasticity and hippocampal neurogenesis from aerobic exercise. Alternatively, or concurrently, the signals might originate from within the brain itself. Physical activity also produces instantaneous and robust neuronal activation of the hippocampal formation and the generation of theta oscillations which are closely correlated with the force of movements. The repeated acute activation of the hippocampus during physical movement is likely critical for inducing the long-term neuroadaptations from exercise. Here we review the evidence which establishes the association between physical movement and hippocampal neuronal activation and discuss implications for long-term benefits of physical activity on brain function.
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Affiliation(s)
- Catarina Rendeiro
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 North Mathews Ave, Urbana, IL, 61801, USA.,School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, B15 2TT, UK
| | - Justin S Rhodes
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 North Mathews Ave, Urbana, IL, 61801, USA. .,Department of Psychology, University of Illinois at Urbana-Champaign, Urbana, USA.
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34
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Abstract
Accumulating research in rodents and humans indicates that exercise benefits brain function and may prevent or delay onset of neurodegenerative conditions. In particular, exercise modifies the structure and function of the hippocampus, a brain area important for learning and memory. This review addresses the central and peripheral mechanisms underlying the beneficial effects of exercise on the hippocampus. We focus on running-induced changes in adult hippocampal neurogenesis, neural circuitry, neurotrophins, synaptic plasticity, neurotransmitters, and vasculature. The role of peripheral factors in hippocampal plasticity is also highlighted. We discuss recent evidence that systemic factors released from peripheral organs such as muscle (myokines), liver (hepatokines), and adipose tissue (adipokines) during exercise contribute to hippocampal neurotrophin and neurogenesis levels, and memory function. A comprehensive understanding of the body-brain axis is needed to elucidate how exercise improves hippocampal plasticity and cognition.
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Affiliation(s)
- C'iana Cooper
- Neuroplasticity and Behavior Unit, Laboratory of Neurosciences, National Institute on Aging, National Institutes of Health, Biomedical Research Center, Baltimore, Maryland 21224
| | - Hyo Youl Moon
- Neuroplasticity and Behavior Unit, Laboratory of Neurosciences, National Institute on Aging, National Institutes of Health, Biomedical Research Center, Baltimore, Maryland 21224
- Institute of Sport Science, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Henriette van Praag
- Neuroplasticity and Behavior Unit, Laboratory of Neurosciences, National Institute on Aging, National Institutes of Health, Biomedical Research Center, Baltimore, Maryland 21224
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35
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Morgan JA, Singhal G, Corrigan F, Jaehne EJ, Jawahar MC, Baune BT. The effects of aerobic exercise on depression-like, anxiety-like, and cognition-like behaviours over the healthy adult lifespan of C57BL/6 mice. Behav Brain Res 2018; 337:193-203. [DOI: 10.1016/j.bbr.2017.09.022] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 09/08/2017] [Accepted: 09/11/2017] [Indexed: 12/20/2022]
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36
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Neuroinflammation and physical exercise as modulators of adult hippocampal neural precursor cell behavior. Rev Neurosci 2017; 29:1-20. [DOI: 10.1515/revneuro-2017-0024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 06/29/2017] [Indexed: 12/15/2022]
Abstract
Abstract
The dentate gyrus of the hippocampus is a plastic structure where adult neurogenesis constitutively occurs. Cell components of the neurogenic niche are source of paracrine as well as membrane-bound factors such as Notch, Bone Morphogenetic Proteins, Wnts, Sonic Hedgehog, cytokines, and growth factors that regulate adult hippocampal neurogenesis and cell fate decision. The integration and coordinated action of multiple extrinsic and intrinsic cues drive a continuous decision process: if adult neural stem cells remain quiescent or proliferate, if they take a neuronal or a glial lineage, and if new cells proliferate, undergo apoptotic death, or survive. The proper balance in the molecular milieu of this neurogenic niche leads to the production of neurons in a higher rate as that of astrocytes. But this rate changes in face of microenvironment modifications as those driven by physical exercise or with neuroinflammation. In this work, we first review the cellular and molecular components of the subgranular zone, focusing on the molecules, active signaling pathways and genetic programs that maintain quiescence, induce proliferation, or promote differentiation. We then summarize the evidence regarding the role of neuroinflammation and physical exercise in the modulation of adult hippocampal neurogenesis with emphasis on the activation of progression from adult neural stem cells to lineage-committed progenitors to their progeny mainly in murine models.
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37
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Decker Y, Müller A, Németh E, Schulz-Schaeffer WJ, Fatar M, Menger MD, Liu Y, Fassbender K. Analysis of the vasculature by immunohistochemistry in paraffin-embedded brains. Brain Struct Funct 2017; 223:1001-1015. [DOI: 10.1007/s00429-017-1595-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 12/12/2017] [Indexed: 01/23/2023]
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38
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Huntsman HD, Rendeiro C, Merritt JR, Pincu Y, Cobert A, De Lisio M, Kolyvas E, Dvoretskiy S, Dobrucki IT, Kemkemer R, Jensen T, Dobrucki LW, Rhodes JS, Boppart MD. The impact of mechanically stimulated muscle-derived stromal cells on aged skeletal muscle. Exp Gerontol 2017; 103:35-46. [PMID: 29269268 DOI: 10.1016/j.exger.2017.12.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 11/16/2017] [Accepted: 12/14/2017] [Indexed: 01/06/2023]
Abstract
Perivascular stromal cells, including mesenchymal stem/stromal cells (MSCs), secrete paracrine factor in response to exercise training that can facilitate improvements in muscle remodeling. This study was designed to test the capacity for muscle-resident MSCs (mMSCs) isolated from young mice to release regenerative proteins in response to mechanical strain in vitro, and subsequently determine the extent to which strain-stimulated mMSCs can enhance skeletal muscle and cognitive performance in a mouse model of uncomplicated aging. Protein arrays confirmed a robust increase in protein release at 24h following an acute bout of mechanical strain in vitro (10%, 1Hz, 5h) compared to non-strain controls. Aged (24month old), C57BL/6 mice were provided bilateral intramuscular injection of saline, non-strain control mMSCs, or mMSCs subjected to a single bout of mechanical strain in vitro (4×104). No significant changes were observed in muscle weight, myofiber size, maximal force, or satellite cell quantity at 1 or 4wks between groups. Peripheral perfusion was significantly increased in muscle at 4wks post-mMSC injection (p<0.05), yet no difference was noted between control and preconditioned mMSCs. Intramuscular injection of preconditioned mMSCs increased the number of new neurons and astrocytes in the dentate gyrus of the hippocampus compared to both control groups (p<0.05), with a trend toward an increase in water maze performance noted (p=0.07). Results from this study demonstrate that acute injection of exogenously stimulated muscle-resident stromal cells do not robustly impact aged muscle structure and function, yet increase the survival of new neurons in the hippocampus.
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Affiliation(s)
- Heather D Huntsman
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Catarina Rendeiro
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Center for Nutrition, Learning and Memory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| | - Jennifer R Merritt
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Psychology and Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Yair Pincu
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Adam Cobert
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Psychology and Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Michael De Lisio
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Emily Kolyvas
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Svyatoslav Dvoretskiy
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Iwona T Dobrucki
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Ralf Kemkemer
- Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems, Stuttgart, Germany
| | - Tor Jensen
- Division of Biomedical Sciences, Carle Hospital, Urbana, IL 61801, USA
| | - Lawrence W Dobrucki
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Justin S Rhodes
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Center for Nutrition, Learning and Memory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Psychology and Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Marni D Boppart
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Center for Nutrition, Learning and Memory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
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39
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von Holstein-Rathlou S, Petersen NC, Nedergaard M. Voluntary running enhances glymphatic influx in awake behaving, young mice. Neurosci Lett 2017; 662:253-258. [PMID: 29079431 DOI: 10.1016/j.neulet.2017.10.035] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 10/17/2017] [Accepted: 10/19/2017] [Indexed: 12/31/2022]
Abstract
Vascular pathology and protein accumulation contribute to cognitive decline, whereas exercise can slow vascular degeneration and improve cognitive function. Recent investigations suggest that glymphatic clearance measured in aged mice while anesthetized is enhanced following exercise. We predicted that exercise would also stimulate glymphatic activity in awake, young mice with higher baseline glymphatic function. Therefore, we assessed glymphatic function in young female C57BL/6J mice following five weeks voluntary wheel running and in sedentary mice. The active mice ran a mean distance of 6km daily. We injected fluorescent tracers in cisterna magna of awake behaving mice and in ketamine/xylazine anesthetized mice, and later assessed tracer distribution in coronal brain sections. Voluntary exercise consistently increased CSF influx during wakefulness, primarily in the hypothalamus and ventral parts of the cortex, but also in the middle cerebral artery territory. While glymphatic activity was higher under ketamine/xylazine anesthesia, we saw a decrease in glymphatic function during running in awake mice after five weeks of wheel running. In summary, daily running increases CSF flux in widespread areas of the mouse brain, which may contribute to the pro-cognitive effects of exercise.
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Affiliation(s)
| | | | - Maiken Nedergaard
- Center for Translational Neuromedicine, University of Copenhagen, 2200 Copenhagen, Denmark; Center for Translational Neuromedicine, Division of Glial Disease and Therapeutics, University of Rochester Medical Center, Rochester, New York 14642, USA
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40
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In Vivo Analysis of the Neurovascular Niche in the Developing Xenopus Brain. eNeuro 2017; 4:eN-NWR-0030-17. [PMID: 28795134 PMCID: PMC5548361 DOI: 10.1523/eneuro.0030-17.2017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 06/27/2017] [Accepted: 06/28/2017] [Indexed: 12/17/2022] Open
Abstract
The neurovascular niche is a specialized microenvironment formed by the interactions between neural progenitor cells (NPCs) and the vasculature. While it is thought to regulate adult neurogenesis by signaling through vascular-derived soluble cues or contacted-mediated cues, less is known about the neurovascular niche during development. In Xenopus laevis tadpole brain, NPCs line the ventricle and extend radial processes tipped with endfeet to the vascularized pial surface. Using in vivo labeling and time-lapse imaging in tadpoles, we find that intracardial injection of fluorescent tracers rapidly labels Sox2/3-expressing NPCs and that vascular-circulating molecules are endocytosed by NPC endfeet. Confocal imaging indicates that about half of the endfeet appear to appose the vasculature, and time-lapse analysis of NPC proliferation and endfeet-vascular interactions suggest that proliferative activity does not correlate with stable vascular apposition. Together, these findings characterize the neurovascular niche in the developing brain and suggest that, while signaling to NPCs may occur through vascular-derived soluble cues, stable contact between NPC endfeet and the vasculature is not required for developmental neurogenesis.
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41
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Rich B, Scadeng M, Yamaguchi M, Wagner PD, Breen EC. Skeletal myofiber vascular endothelial growth factor is required for the exercise training-induced increase in dentate gyrus neuronal precursor cells. J Physiol 2017; 595:5931-5943. [PMID: 28597506 DOI: 10.1113/jp273994] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2016] [Accepted: 05/16/2017] [Indexed: 11/08/2022] Open
Abstract
KEY POINTS Peripheral vascular endothelial growth factor (VEGF) is necessary for exercise to stimulate hippocampal neurogenesis. Here we report that skeletal myofiber VEGF directly or indirectly regulates exercise-signalled proliferation of neuronal precursor cells. Our results found skeletal myofiber VEGF to be necessary for maintaining blood flow through hippocampal regions independent of exercise training state. This study demonstrates that skeletal myofiber VEGF is required for the hippocampal VEGF response to acute exercise. These results help to establish the mechanisms by which exercise, through skeletal myofiber VEGF, affects the hippocampus. ABSTRACT Exercise signals neurogenesis in the dentate gyrus of the hippocampus. This phenomenon requires vascular endothelial growth factor (VEGF) originating from outside the blood-brain barrier, but no cellular source has been identified. Thus, we hypothesized that VEGF produced by skeletal myofibers plays a role in regulating hippocampal neuronal precursor cell proliferation following exercise training. This was tested in adult conditional skeletal myofiber-specific VEGF gene-ablated mice (VEGFHSA-/- ) by providing VEGFHSA-/- and non-ablated (VEGFf/f ) littermates with running wheels for 14 days. Following this training period, hippocampal cerebral blood flow (CBF) was measured by functional magnetic resonance imaging (fMRI), and neuronal precursor cells (BrdU+/Nestin+) were detected by immunofluorescence. The VEGFf/f trained group showed improvements in both speed and endurance capacity in acute treadmill running tests (P < 0.05). The VEGFHSA-/- group did not. The number of proliferating neuronal precursor cells was increased with training in VEGFf/f (P < 0.05) but not in VEGFHSA-/- mice. Endothelial cell (CD31+) number did not change in this region with exercise training or skeletal myofiber VEGF gene deletion. However, resting blood flow through the hippocampal region was lower in VEGFHSA-/- mice, both untrained and trained, than untrained VEGFf/f mice (P < 0.05). An acute hypoxic challenge decreased CBF (P < 0.05) in untrained VEGFf/f , untrained VEGFHSA-/- and trained VEGFHSA-/- mice, but not trained VEGFf/f mice. VEGFf/f , but not VEGFHSA-/- , mice were able to acutely run on a treadmill at an intensity sufficient to increase hippocampus VEGF levels. These data suggest that VEGF expressed by skeletal myofibers may directly or indirectly regulate both hippocampal blood flow and neurogenesis.
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Affiliation(s)
- Benjamin Rich
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Miriam Scadeng
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | | | - Peter D Wagner
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Ellen C Breen
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
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42
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Cahill LS, Bishop J, Gazdzinski LM, Dorr A, Stefanovic B, Sled JG. Altered cerebral blood flow and cerebrovascular function after voluntary exercise in adult mice. Brain Struct Funct 2017; 222:3395-3405. [PMID: 28391400 DOI: 10.1007/s00429-017-1409-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 03/20/2017] [Indexed: 01/06/2023]
Abstract
The beneficial effects of physical exercise on brain health are well documented, yet how exercise modulates cerebrovascular function is not well understood. This study used continuous arterial spin labeling magnetic resonance imaging with a hypercapnic challenge to examine changes in cerebral blood flow and vascular function after voluntary exercise in healthy, adult mice. Thirty exercise mice and twenty-one control mice were imaged prior to the start of the exercise regime (at 12 weeks of age) and after 4 weeks of voluntary exercise. After the second in vivo imaging session, we performed high-resolution ex vivo anatomical brain imaging to correlate the structural brain changes with functional measures of flow and vascular reserve. We found that exercise resulted in increases in the normocapnic and hypercapnic blood flow in the hippocampus. Moreover, the change in normocapnic blood flow between pre-exercise and post-exercise was positively correlated to the hippocampal structure volume following exercise. There was no overall effect of voluntary exercise on blood flow in the motor cortex. Surprisingly, the hypercapnic hippocampal blood flow when measured prior to the start of exercise was predictive of subsequent exercise activity. Moreover, exercise was found to normalize this pre-existing difference in hypercapnic blood flow between mice.
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Affiliation(s)
- Lindsay S Cahill
- Mouse Imaging Centre, The Hospital for Sick Children, 25 Orde Street, Toronto, ON, M5T 2H7, Canada.
| | - Jonathan Bishop
- Mouse Imaging Centre, The Hospital for Sick Children, 25 Orde Street, Toronto, ON, M5T 2H7, Canada
| | - Lisa M Gazdzinski
- Mouse Imaging Centre, The Hospital for Sick Children, 25 Orde Street, Toronto, ON, M5T 2H7, Canada
| | | | - Bojana Stefanovic
- Sunnybrook Research Institute, Toronto, ON, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
| | - John G Sled
- Mouse Imaging Centre, The Hospital for Sick Children, 25 Orde Street, Toronto, ON, M5T 2H7, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
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43
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Dorr A, Thomason LA, Koletar MM, Joo IL, Steinman J, Cahill LS, Sled JG, Stefanovic B. Effects of voluntary exercise on structure and function of cortical microvasculature. J Cereb Blood Flow Metab 2017; 37:1046-1059. [PMID: 27683451 PMCID: PMC5363487 DOI: 10.1177/0271678x16669514] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Aerobic activity has been shown highly beneficial to brain health, yet much uncertainty still surrounds the effects of exercise on the functioning of cerebral microvasculature. This study used two-photon fluorescence microscopy to examine cerebral hemodynamic alterations as well as accompanying geometric changes in the cortical microvascular network following five weeks of voluntary exercise in transgenic mice endogenously expressing tdTomato in vascular endothelial cells to allow visualization of microvessels irrespective of their perfusion levels. We found a diminished microvascular response to a hypercapnic challenge (10% FiCO2) in running mice when compared to that in nonrunning controls despite commensurate increases in transcutaneous CO2 tension. The flow increase to hypercapnia in runners was 70% lower than that in nonrunners (p = 0.0070) and the runners' arteriolar red blood cell speed changed by only half the amount seen in nonrunners (p = 0.0085). No changes were seen in resting hemodynamics or in the systemic physiological parameters measured. Although a few unperfused new vessels were observed on visual inspection, running did not produce significant morphological differences in the microvascular morphometric parameters, quantified following semiautomated tracking of the microvascular networks. We propose that voluntary running led to increased cortical microvascular efficiency and desensitization to CO2 elevation.
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Affiliation(s)
| | | | | | - Illsung L Joo
- 1 Sunnybrook Research Institute, Toronto, Canada.,2 Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Joe Steinman
- 2 Department of Medical Biophysics, University of Toronto, Toronto, Canada.,3 Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Canada
| | - Lindsay S Cahill
- 3 Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Canada
| | - John G Sled
- 2 Department of Medical Biophysics, University of Toronto, Toronto, Canada.,3 Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Canada
| | - Bojana Stefanovic
- 1 Sunnybrook Research Institute, Toronto, Canada.,2 Department of Medical Biophysics, University of Toronto, Toronto, Canada
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44
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Abstract
The functions of adult hippocampal neurogenesis have been extensively investigated during the past decade. Numerous studies have shown that adult neurogenesis may play an important role in the hippocampal-dependent learning and memory. This study evaluated the influence of exercise on hippocampal neurogenesis, neural plasticity, neurotrophic factors, and cognition. Areas of research focused on enhancing effect of exercise for adult hippocampal neurogenesis and protective role of exercise against brain diseases. The present study suggests that exercise improves brain functions and prevents decline of cognition across the lifespan. Understanding of neurobiological mechanisms of exercise on brain functions may lead to the development of novel therapeutic strategy for neurodegenerative disorders.
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Affiliation(s)
- Seung-Soo Baek
- Department of Sport & Health Science, College of Natural Science, Sangmyung University, Seoul, Korea
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45
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SCOTT SAMUELP, DE SOUZA MARYJANE, KOEHLER KARSTEN, PETKUS DYLANL, MURRAY-KOLB LAURAE. Cardiorespiratory Fitness Is Associated with Better Executive Function in Young Women. Med Sci Sports Exerc 2016; 48:1994-2002. [DOI: 10.1249/mss.0000000000000974] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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46
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Lipp HP, Bonfanti L. Adult Neurogenesis in Mammals: Variations and Confusions. BRAIN, BEHAVIOR AND EVOLUTION 2016; 87:205-221. [DOI: 10.1159/000446905] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Mammalian adult neurogenesis has remained enigmatic. Two lines of research have emerged. One focuses on a potential repair mechanism in the human brain. The other aims at elucidating its functional role in the hippocampal formation, chiefly in cognitive processes; however, thus far it has been unsuccessful. Here, we try to recognize the sources of errors and conceptual confusion in comparative studies and neurobehavioral approaches with a focus on mice. Evolutionarily, mammalian adult neurogenesis appears as protracted juvenile neurogenesis originating from precursor cells in the secondary proliferation zones, from where newly formed cells migrate to target regions in the forebrain. This late developmental process is downregulated differentially in various brain structures depending on species and age. Adult neurogenesis declines substantially during early adulthood and persists at low levels into senescence. Short-lasting episodes in proliferation or reduction of adult neurogenesis may reflect a multitude of factors, and have been studied chiefly in mice and rats. Comparative studies face both species-specific variations in staining and technical abilities of laboratories, lacking quantification of important reference measures (e.g. granule cell number) and evaluation of maturational markers whose persistence might be functionally more relevant than proliferation rates. Likewise, the confusion about the functional role of variations in adult hippocampal neurogenesis has many causes. Prominent is an inferential statistical approach, usually with low statistical power. Interpretation is complicated by multiple theories about hippocampal function, often unrealistically extrapolating from humans to rodents. We believe that the field of mammalian adult neurogenesis needs more critical thinking, more sophisticated hypotheses, better statistical, technical and behavioral approaches, and a broader conceptual perspective incorporating comparative aspects rather than neglecting them.
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47
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Hamilton GF, Bucko PJ, Miller DS, DeAngelis RS, Krebs CP, Rhodes JS. Behavioral deficits induced by third-trimester equivalent alcohol exposure in male C57BL/6J mice are not associated with reduced adult hippocampal neurogenesis but are still rescued with voluntary exercise. Behav Brain Res 2016; 314:96-105. [PMID: 27491590 DOI: 10.1016/j.bbr.2016.07.052] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 07/21/2016] [Accepted: 07/30/2016] [Indexed: 01/10/2023]
Abstract
Prenatal alcohol exposure can produce permanent alterations in brain structure and profound behavioral deficits. Mouse models can help discover mechanisms and identify potentially useful interventions. This study examined long-term influences of either a single or repeated alcohol exposure during the third-trimester equivalent on survival of new neurons in the hippocampus, behavioral performance on the Passive avoidance and Rotarod tasks, and the potential role of exercise as a therapeutic intervention. C57BL/6J male mice received either saline or 5g/kg ethanol split into two s.c. injections, two hours apart, on postnatal day (PD)7 (Experiment 1) or on PD5, 7 and 9 (Experiment 2). All mice were weaned on PD21 and received either a running wheel or remained sedentary from PD35-PD80/81. From PD36-45, mice received i.p. injections of 50mg/kg bromodeoxyuridine (BrdU) to label dividing cells. Behavioral testing occurred between PD72-79. Number of surviving BrdU+ cells and immature neurons (doublecortin; DCX+) was measured at PD80-81. Alcohol did not affect number of BrdU+ or DCX+ cells in either experiment. Running significantly increased number of BrdU+ and DCX+ cells in both treatment groups. Alcohol-induced deficits on Rotarod performance and acquisition of the Passive avoidance task (Day 1) were evident only in Experiment 2 and running rescued these deficits. These data suggest neonatal alcohol exposure does not result in long-term impairments in adult hippocampal neurogenesis in the mouse model. Three doses of ethanol were necessary to induce behavioral deficits. Finally, the mechanisms by which exercise ameliorated the neonatal alcohol induced behavioral deficits remain unknown.
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Affiliation(s)
- G F Hamilton
- Department of Psychology, The Beckman Institute, 405 N Mathews Ave, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
| | - P J Bucko
- Department of Psychology, The Beckman Institute, 405 N Mathews Ave, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - D S Miller
- Department of Psychology, The Beckman Institute, 405 N Mathews Ave, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - R S DeAngelis
- Department of Psychology, The Beckman Institute, 405 N Mathews Ave, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - C P Krebs
- Department of Psychology, The Beckman Institute, 405 N Mathews Ave, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - J S Rhodes
- Department of Psychology, The Beckman Institute, 405 N Mathews Ave, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
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48
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Kandola A, Hendrikse J, Lucassen PJ, Yücel M. Aerobic Exercise as a Tool to Improve Hippocampal Plasticity and Function in Humans: Practical Implications for Mental Health Treatment. Front Hum Neurosci 2016; 10:373. [PMID: 27524962 PMCID: PMC4965462 DOI: 10.3389/fnhum.2016.00373] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 07/11/2016] [Indexed: 12/24/2022] Open
Abstract
Aerobic exercise (AE) has been widely praised for its potential benefits to cognition and overall brain and mental health. In particular, AE has a potent impact on promoting the function of the hippocampus and stimulating neuroplasticity. As the evidence-base rapidly builds, and given most of the supporting work can be readily translated from animal models to humans, the potential for AE to be applied as a therapeutic or adjunctive intervention for a range of human conditions appears ever more promising. Notably, many psychiatric and neurological disorders have been associated with hippocampal dysfunction, which may underlie the expression of certain symptoms common to these disorders, including (aspects of) cognitive dysfunction. Augmenting existing treatment approaches using AE based interventions may promote hippocampal function and alleviate cognitive deficits in various psychiatric disorders that currently remain untreated. Incorporating non-pharmacological interventions into clinical treatment may also have a number of other benefits to patient well being, such as limiting the risk of adverse side effects. This review incorporates both animal and human literature to comprehensively detail how AE is associated with cognitive enhancements and stimulates a cascade of neuroplastic mechanisms that support improvements in hippocampal functioning. Using the examples of schizophrenia and major depressive disorder, the utility and implementation of an AE intervention to the clinical domain will be proposed, aimed to reduce cognitive deficits in these, and related disorders.
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Affiliation(s)
- Aaron Kandola
- Brain and Mental Health Lab, School of Psychological Sciences and Monash Institute of Cognitive and Clinical Neurosciences, Monash University, MelbourneVIC, Australia; Amsterdam Brain and Cognition, University of AmsterdamAmsterdam, Netherlands
| | - Joshua Hendrikse
- Brain and Mental Health Lab, School of Psychological Sciences and Monash Institute of Cognitive and Clinical Neurosciences, Monash University, Melbourne VIC, Australia
| | - Paul J Lucassen
- Centre for Neuroscience, Swammerdam Institute of Life Sciences, University of Amsterdam Amsterdam, Netherlands
| | - Murat Yücel
- Brain and Mental Health Lab, School of Psychological Sciences and Monash Institute of Cognitive and Clinical Neurosciences, Monash University, Melbourne VIC, Australia
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49
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Chaddock-Heyman L, Erickson KI, Chappell MA, Johnson CL, Kienzler C, Knecht A, Drollette ES, Raine LB, Scudder MR, Kao SC, Hillman CH, Kramer AF. Aerobic fitness is associated with greater hippocampal cerebral blood flow in children. Dev Cogn Neurosci 2016; 20:52-8. [PMID: 27419884 PMCID: PMC6987716 DOI: 10.1016/j.dcn.2016.07.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 06/30/2016] [Accepted: 07/01/2016] [Indexed: 11/22/2022] Open
Abstract
The present study is the first to investigate whether cerebral blood flow in the hippocampus relates to aerobic fitness in children. In particular, we used arterial spin labeling (ASL) perfusion MRI to provide a quantitative measure of blood flow in the hippocampus in 73 7- to 9-year-old preadolescent children. Indeed, aerobic fitness was found to relate to greater perfusion in the hippocampus, independent of age, sex, and hippocampal volume. Such results suggest improved microcirculation and cerebral vasculature in preadolescent children with higher levels of aerobic fitness. Further, aerobic fitness may influence how the brain regulates its metabolic demands via blood flow in a region of the brain important for learning and memory. To add specificity to the relationship of fitness to the hippocampus, we demonstrate no significant association between aerobic fitness and cerebral blood flow in the brainstem. Our results reinforce the importance of aerobic fitness during a critical period of child development.
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Affiliation(s)
| | - Kirk I Erickson
- Department of Psychology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Michael A Chappell
- Institute of Biomedical Engineering and Oxford Centre for Functional MRI of the Brain, University of Oxford, Oxford, United Kingdom
| | - Curtis L Johnson
- Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Caitlin Kienzler
- Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Anya Knecht
- Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Eric S Drollette
- Department of Kinesiology & Community Health, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Lauren B Raine
- Department of Kinesiology & Community Health, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Mark R Scudder
- Department of Kinesiology & Community Health, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Shih-Chun Kao
- Department of Kinesiology & Community Health, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Charles H Hillman
- Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL, USA; Department of Kinesiology & Community Health, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Arthur F Kramer
- Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL, USA
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50
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Ryan SM, Kelly ÁM. Exercise as a pro-cognitive, pro-neurogenic and anti-inflammatory intervention in transgenic mouse models of Alzheimer's disease. Ageing Res Rev 2016; 27:77-92. [PMID: 27039886 DOI: 10.1016/j.arr.2016.03.007] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 03/22/2016] [Accepted: 03/30/2016] [Indexed: 12/20/2022]
Abstract
It is now well established, at least in animal models, that exercise elicits potent pro-cognitive and pro-neurogenic effects. Alzheimer's disease (AD) is one of the leading causes of dementia and represents one of the greatest burdens on healthcare systems worldwide, with no effective treatment for the disease to date. Exercise presents a promising non-pharmacological option to potentially delay the onset of or slow down the progression of AD. Exercise interventions in mouse models of AD have been explored and have been found to reduce amyloid pathology and improve cognitive function. More recent studies have expanded the research question by investigating potential pro-neurogenic and anti-inflammatory effects of exercise. In this review we summarise studies that have examined exercise-mediated effects on AD pathology, cognitive function, hippocampal neurogenesis and neuroinflammation in transgenic mouse models of AD. Furthermore, we attempt to identify the optimum exercise conditions required to elicit the greatest benefits, taking into account age and pathology of the model, as well as type and duration of exercise.
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