51
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Qiu X, Ping S, Kyle M, Longo J, Chin L, Zhao LR. S100 Calcium-Binding Protein A9 Knockout Contributes to Neuroprotection and Functional Improvement after Traumatic Brain Injury. J Neurotrauma 2019; 37:950-965. [PMID: 31621496 DOI: 10.1089/neu.2018.6170] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
S100 calcium-binding protein A9 (S100a9), a proinflammatory protein, has been shown to be involved in the development of neuroinflammatory disorders and neurodegenerative diseases. Upregulation of S100a9 in the brain during acute brain injury has been proposed to be associated with acute neuroinflammation. However, it remains unclear whether eliminating S100a9 expression will show beneficial outcomes after traumatic brain injury (TBI). Using S100a9 knockout mice, this study has demonstrated that S100a9 deletion ameliorates post-TBI anxiety, improves TBI-impaired motor and cognitive function, reduces lesion size, prevents perilesional neuron loss and neurodegeneration, diminishes neuroinflammation and TBI-induced neurogenesis, and enhances perilesional expression of neuroplasticity protein. These findings suggest that S100a9 plays a detrimental role in TBI. Genetic deletion of S100a9 enhances neuroprotection and improves functional outcome after TBI. This study sheds light on the pathological involvement of S100a9 in TBI, which would provide a new therapeutic target to minimize TBI-induced brain damage.
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Affiliation(s)
- Xuecheng Qiu
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, New York
| | - Suning Ping
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, New York
| | - Michele Kyle
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, New York
| | - John Longo
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, New York
| | - Lawrence Chin
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, New York
| | - Li-Ru Zhao
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, New York.,VA Health Care Upstate New York, Syracuse VA Medical Center, Syracuse, New York
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52
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Zhan Y, Li MZ, Yang L, Feng XF, Zhang QX, Zhang N, Zhao YY, Zhao H. An MRI Study of Neurovascular Restorative After Combination Treatment With Xiaoshuan Enteric-Coated Capsule and Enriched Environment in Rats After Stroke. Front Neurosci 2019; 13:701. [PMID: 31354412 PMCID: PMC6630081 DOI: 10.3389/fnins.2019.00701] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 06/20/2019] [Indexed: 12/13/2022] Open
Abstract
Xiaoshuan enteric-coated capsule (XSEC) is a Chinese medicinal compound widely used for treatment of ischemic cerebrovascular diseases. Enriched environment (EE) is an effective rehabilitative protocol designed to enhance sensorimotor, cognitive and social stimulation. This study aimed to apply magnetic resonance imaging (MRI) to non-invasively assess whether EE could augment the therapeutic benefits of XSEC on post-ischemic neurovascular remodeling. Male Sprague–Dawley rats were subjected to permanent middle cerebral artery occlusion (MCAO) and treated with XSEC and EE alone or combination for 30 consecutive days. Beam walking test and Morris water maze (MWM) test were performed to evaluate motor and cognitive function, respectively. Multimodal MRI was applied to examine alterations to brain structures, intracranial vessels, and cerebral perfusion on the 31st day after MCAO. Double-immunofluorescent staining was used to evaluate neurogenesis and angiogenesis. Western blot and RT-PCR were used to detect the expressions of vascular endothelial growth factor (VEGF), angiopoietin-1 (Ang-1), angiopoietin-2 (Ang-2), and the axon guidance molecules. Combination therapy with XSEC and EE significantly reduced cystic volume compared with XSEC and EE monotherapies. In line with this, combination treated rats performed better in the beam walking test and exhibited improved spatial memory in the probe trial of the MWM. Moreover, XSEC and EE combination treatment improved cerebral blood flow (CBF), amplified angiogenesis and upregulated VEGF protein levels. This proangiogenic effect was consistent with the increased progenitor cell proliferation and neuronal differentiation in the peri-infarct cortex and striatum. Specifically, the combined therapy of XSEC and EE markedly increased the Netrin-1 and Robo-1 protein expression levels compared with vehicle group, while no difference was observed between XSEC or EE monotherapy and vehicle group. Together, these findings indicate that the combination of XSEC and EE benefits neurovascular reorganization. This correlates with restoration of CBF, promotion of neurogenesis and angiogenesis, and activation of the intrinsic axonal guidance molecules, thereby facilitating greater physical rehabilitation after ischemic stroke.
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Affiliation(s)
- Yu Zhan
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, China.,Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, China
| | - Man-Zhong Li
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, China.,Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, China
| | - Le Yang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, China.,Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, China
| | - Xue-Feng Feng
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, China.,Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, China
| | - Qiu-Xia Zhang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, China.,Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, China
| | - Nan Zhang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, China.,Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, China
| | - Yuan-Yuan Zhao
- Medical Imaging Laboratory of Core Facility Center, Capital Medical University, Beijing, China
| | - Hui Zhao
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, China.,Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, China
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53
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Bhatt RR, Gupta A, Rapkin A, Kilpatrick LA, Hamadani K, Pazmany E, Van Oudenhove L, Stains J, Aerts L, Enzlin P, Tillisch K, Mayer EA, Labus JS. Altered gray matter volume in sensorimotor and thalamic regions associated with pain in localized provoked vulvodynia: a voxel-based morphometry study. Pain 2019; 160:1529-1540. [PMID: 30817440 PMCID: PMC6586504 DOI: 10.1097/j.pain.0000000000001532] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Multimodal neuroimaging studies provide support for a role of alterations in sensory processing circuits and endogenous pain modulatory systems in provoked vestibulodynia (PVD). In this study, we tested the hypotheses that PVD compared with healthy controls (HCs) would demonstrate gray matter volume (GMV) alterations in regions associated with sensorimotor, corticothalamic, and basal ganglia circuits. We also tested the replicability of previously reported gray matter increases in basal ganglia and hippocampal volumes in PVD vs HCs. In addition, disease specificity of GMV alterations were examined by comparing PVD with another chronic pain disorder. Finally, we examine whether GMV alterations are correlated with symptom measures. Structural magnetic resonance imaging was obtained in 119 premenopausal women (45 PVD, 45 HCs, and 29 irritable bowel syndrome [IBS]). A voxel-based morphometry analysis was applied to determine group differences in the hypothesized regions of interest. Compared with HCs, PVD women exhibited greater GMV in the basal ganglia, hippocampus, and sensorimotor cortices. Compared to patients with IBS, women with PVD had greater GMV in the hippocampus, and sensorimotor network, but lower GMV in the thalamus and precentral gyrus. Regional GMV alterations were associated with patient reports of pain during intercourse and muscle tenderness. The current findings provide further evidence that GMV is increased in PVD compared with HCs in several regions of the sensorimotor network and the hippocampus in patients with PVD. In addition, GMV distinct alterations in the sensorimotor network were identified between 2 pelvic pain disorders, PVD compared with IBS.
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Affiliation(s)
- Ravi R. Bhatt
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, UCLA
- Pediatric Pain and Palliative Care Program, UCLA
| | - Arpana Gupta
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, UCLA
- David Geffen School of Medicine, UCLA
- UCLA Vatche & Tamar Manoukian Division of Digestive Diseases, UCLA
| | - Andrea Rapkin
- David Geffen School of Medicine, UCLA
- Department of Obstetrics and Gynecology, UCLA
| | - Lisa A. Kilpatrick
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, UCLA
- David Geffen School of Medicine, UCLA
- UCLA Vatche & Tamar Manoukian Division of Digestive Diseases, UCLA
| | - Kareem Hamadani
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, UCLA
| | - Els Pazmany
- Institute for Family and Sexuality Studies, KU Leuven
| | - Lukas Van Oudenhove
- Translational Research Center for Gastrointestinal Disorders, University of Leuven
| | - Jean Stains
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, UCLA
- David Geffen School of Medicine, UCLA
- UCLA Vatche & Tamar Manoukian Division of Digestive Diseases, UCLA
| | - Leen Aerts
- Institute for Family and Sexuality Studies, KU Leuven
- Geneva University Hospitals
| | - Paul Enzlin
- Institute for Family and Sexuality Studies, KU Leuven
| | - Kirsten Tillisch
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, UCLA
- David Geffen School of Medicine, UCLA
- UCLA Vatche & Tamar Manoukian Division of Digestive Diseases, UCLA
| | - Emeran A. Mayer
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, UCLA
- David Geffen School of Medicine, UCLA
- UCLA Vatche & Tamar Manoukian Division of Digestive Diseases, UCLA
- Brain Research Institute, UCLA
| | - Jennifer S. Labus
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, UCLA
- David Geffen School of Medicine, UCLA
- UCLA Vatche & Tamar Manoukian Division of Digestive Diseases, UCLA
- Brain Research Institute, UCLA
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54
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Aumont É, Arguin M, Bohbot V, West GL. Increased flanker task and forward digit span performance in caudate-nucleus-dependent response strategies. Brain Cogn 2019; 135:103576. [PMID: 31203022 DOI: 10.1016/j.bandc.2019.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 05/28/2019] [Accepted: 05/28/2019] [Indexed: 11/28/2022]
Abstract
One of two memory systems can be used to navigate in a new environment. Hippocampus-dependent spatial strategy consists of creating a cognitive map of an environment and caudate nucleus-dependent response strategy consists of memorizing a rigid sequence of turns. Spontaneous use of the response strategy is associated with greater activity and grey matter within the caudate nucleus while the spatial strategy is associated with greater activity and grey matter in the hippocampus. The caudate nucleus is involved in executive functions such as working memory, cognitive control and certain aspects of attention such as attentional disengaging. This study therefore aimed to investigate whether response learners would display better performance on tests of executive and attention functioning compared to spatial learners. Fifty participants completed the 4/8 virtual maze to assess navigational strategy, the forward and backward visual digit span and the Attention Network Test - Revised to assess both attention disengagement and cognitive control. Results revealed that response learners showed significantly higher working memory capacity, more efficient attention disengagement and better cognitive control. Results suggest that response learners, who putatively display more grey matter and activity in the caudate nucleus, are associated with better working memory span, cognitive control and attentional disengagement.
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Affiliation(s)
- Étienne Aumont
- Center of Research in Neuropsychology and Cognition, Department of Psychology, University of Montreal, Montreal, Quebec, Canada.
| | - Martin Arguin
- Center of Research in Neuropsychology and Cognition, Department of Psychology, University of Montreal, Montreal, Quebec, Canada
| | - Véronique Bohbot
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Verdun, Quebec, Canada
| | - Greg L West
- Center of Research in Neuropsychology and Cognition, Department of Psychology, University of Montreal, Montreal, Quebec, Canada
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55
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Fong S, Buechel SD, Boussard A, Kotrschal A, Kolm N. Plastic changes in brain morphology in relation to learning and environmental enrichment in the guppy ( Poecilia reticulata). ACTA ACUST UNITED AC 2019; 222:jeb.200402. [PMID: 31053644 DOI: 10.1242/jeb.200402] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 04/26/2019] [Indexed: 12/19/2022]
Abstract
Despite the common assumption that the brain is malleable to surrounding conditions mainly during ontogeny, plastic neural changes can occur also in adulthood. One of the driving forces responsible for alterations in brain morphology is increasing environmental complexity that may demand enhanced cognitive abilities (e.g. attention, memory and learning). However, studies looking at the relationship between brain morphology and learning are scarce. Here, we tested the effects of both learning and environmental enrichment on neural plasticity in guppies (Poecilia reticulata), by means of either a reversal-learning test or a spatial-learning test. Given considerable evidence supporting environmentally induced plastic alterations, two separate control groups that were not subjected to any cognitive test were included to account for potential changes induced by the experimental setup alone. We did not find any effect of learning on any of our brain measurements. However, we found strong evidence for an environmental effect, where fish given access to the spatial-learning environment had larger relative brain size and optic tectum size in relation to those exposed to the reversal-learning environment. Our results demonstrate the plasticity of the adult brain to respond adaptively mainly to environmental conditions, providing support for the environmental enhancement theory.
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Affiliation(s)
- Stephanie Fong
- Department of Zoology, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Séverine D Buechel
- Department of Zoology, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Annika Boussard
- Department of Zoology, Stockholm University, SE-106 91 Stockholm, Sweden
| | | | - Niclas Kolm
- Department of Zoology, Stockholm University, SE-106 91 Stockholm, Sweden
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56
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Badea A, Ng KL, Anderson RJ, Zhang J, Miller MI, O’Brien RJ. Magnetic resonance imaging of mouse brain networks plasticity following motor learning. PLoS One 2019; 14:e0216596. [PMID: 31067263 PMCID: PMC6505950 DOI: 10.1371/journal.pone.0216596] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 04/24/2019] [Indexed: 12/12/2022] Open
Abstract
We do not have a full understanding of the mechanisms underlying plasticity in the human brain. Mouse models have well controlled environments and genetics, and provide tools to help dissect the mechanisms underlying the observed responses to therapies devised for humans recovering from injury of ischemic nature or trauma. We aimed to detect plasticity following learning of a unilateral reaching movement, and relied on MRI performed with a rapid structural protocol suitable for in vivo brain imaging, and a longer diffusion tensor imaging (DTI) protocol executed ex vivo. In vivo MRI detected contralateral volume increases in trained animals (reachers), in circuits involved in motor control, sensory processing, and importantly, learning and memory. The temporal association area, parafascicular and mediodorsal thalamic nuclei were also enlarged. In vivo MRI allowed us to detect longitudinal effects over the ~25 days training period. The interaction between time and group (trained versus not trained) supported a role for the contralateral, but also the ipsilateral hemisphere. While ex vivo imaging was affected by shrinkage due to the fixation, it allowed for superior resolution and improved contrast to noise ratios, especially for subcortical structures. We examined microstructural changes based on DTI, and identified increased fractional anisotropy and decreased apparent diffusion coefficient, predominantly in the cerebellum and its connections. Cortical thickness differences did not survive multiple corrections, but uncorrected statistics supported the contralateral effects seen with voxel based volumetric analysis, showing thickening in the somatosensory, motor and visual cortices. In vivo and ex vivo analyses identified plasticity in circuits relevant to selecting actions in a sensory-motor context, through exploitation of learned association and decision making. By mapping a connectivity atlas into our ex vivo template we revealed that changes due to skilled motor learning occurred in a network of 35 regions, including the primary and secondary motor (M1, M2) and sensory cortices (S1, S2), the caudate putamen (CPu), visual (V1) and temporal association cortex. The significant clusters intersected tractography based networks seeded in M1, M2, S1, V1 and CPu at levels > 80%. We found that 89% of the significant cluster belonged to a network seeded in the contralateral M1, and 85% to one seeded in the contralateral M2. Moreover, 40% of the M1 and S1 cluster by network intersections were in the top 80th percentile of the tract densities for their respective networks. Our investigation may be relevant to studies of rehabilitation and recovery, and points to widespread network changes that accompany motor learning that may have potential applications to designing recovery strategies following brain injury.
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Affiliation(s)
- Alexandra Badea
- Center for In Vivo Microscopy, Department of Radiology, Duke University Medical Center, Durham, NC, United States of America
- Department of Neurology, Duke University Medical Center, Durham, NC, United States of America
- Brain Imaging and Analysis Center, Duke University, Durham, NC, United States of America
- * E-mail:
| | - Kwan L. Ng
- Department of Neurology, UC Davis School of Medicine, Davis, CA, United States of America
| | - Robert J. Anderson
- Center for In Vivo Microscopy, Department of Radiology, Duke University Medical Center, Durham, NC, United States of America
| | - Jiangyang Zhang
- Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University School of Medicine, New York, NY, United States of America
| | - Michael I. Miller
- Center for Imaging Science, Johns Hopkins University; Institute for Computational Medicine, Johns Hopkins University, Baltimore, MD, United States of America
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, United States of America
| | - Richard J. O’Brien
- Department of Neurology, Duke University Medical Center, Durham, NC, United States of America
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57
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Rahmati M, Kazemi A. Various exercise intensities differentially regulate GAP-43 and CAP-1 expression in the rat hippocampus. Gene 2019; 692:185-194. [PMID: 30682386 DOI: 10.1016/j.gene.2019.01.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 12/20/2018] [Accepted: 01/13/2019] [Indexed: 02/07/2023]
Abstract
Exercise intensity is known to affect neuroplasticity. Although corticosterone and lactate levels have been linked to neuroplasticity, the effect of different endurance exercise intensity-dependent production of these biochemicals on the behaviour of hippocampal growth cone markers remains incompletely explored. Here, we investigated the effects of three different endurance treadmill training episodes for six weeks on GAP-43 and CAP-1 expression in the hippocampus of adult male Wistar rats. Our findings showed that mild exercise intensity (MEI) with a lactate production slightly higher than the lactate threshold (LT) is the optimal form of physical activity for elevating GAP-43 without changing CAP-1 expression. It was further observed that high exercise intensity (HEI) with the highest level of corticosterone and lactate production, reduced GAP-43 expression, yet increased CAP-1 expression in the hippocampus. Like HEI, we further identified similar expression patterns for these markers in low exercise intensity (LEI) with blood lactate production below LT and corticosterone level similar to MEI. The findings suggested that in high-intensity exercise, the negative pattern of hippocampal neuroplasticity depends on both corticosterone and lactate levels, whereas in low-intensity exercise, the most important factor determining this negative pattern is the lactate level. Generally, MEI with a lactate production of slightly higher than LT is the most optimal intensity for improving hippocampal neuroplasticity.
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Affiliation(s)
- Masoud Rahmati
- Department of Physical Education and Sport Sciences, Faculty of Literature and Human Sciences, Lorestan University, Khorramabad, Iran.
| | - Abdolreza Kazemi
- Department of Physical Education and Sports Sciences, Faculty of Literature and Human Sciences, Vali E Asr University of Rafsanjan, Rafsanjan, Iran
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58
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Aumont É, Blanchette CA, Bohbot VD, West GL. Caudate nucleus-dependent navigation strategies are associated with increased risk-taking and set-shifting behavior. ACTA ACUST UNITED AC 2019; 26:101-108. [PMID: 30898972 PMCID: PMC6432169 DOI: 10.1101/lm.048306.118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 02/07/2019] [Indexed: 01/12/2023]
Abstract
When people navigate, they use strategies dependent on one of two memory systems. The hippocampus-based spatial strategy consists of using multiple landmarks to create a cognitive map of the environment. In contrast, the caudate nucleus-based response strategy is based on the memorization of a series of turns. Importantly, response learners display more gray matter and functional activity in the caudate nucleus and less gray matter in the hippocampus. In parallel, the caudate nucleus is involved in decision-making by mediating attention toward rewards and in set-shifting by mediating preparatory actions. The present study, therefore, examined the link between navigational strategy use, that are associated with gray matter differences in the caudate nucleus and hippocampus, and decision-making and set-shifting performance. Fifty-three participants completed the 4 on 8 virtual maze, the Iowa Gambling Task (IGT), the Wisconsin Card Sorting Test-64 (WCST-64), and a task-switching test. The results revealed that people who use response strategies displayed increased risk-taking behavior in the IGT compared to the people using hippocampus-dependent spatial strategies. Response strategy was also associated with enhanced set-shifting performance in the WCST-64 and task-switching test. These results confirm that risk-taking and set-shifting behavior, that are differentially impacted by the caudate nucleus and hippocampus memory systems, can be predicted by navigational strategy.
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Affiliation(s)
- Étienne Aumont
- Centre de Recherche en Neuropsychologie et Cognition, University of Montreal, Montreal, Quebec H3C 3J7, Canada
| | - Caroll-Ann Blanchette
- Centre de Recherche en Neuropsychologie et Cognition, University of Montreal, Montreal, Quebec H3C 3J7, Canada
| | - Veronique D Bohbot
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Verdun, Québec H4H 1R3, Canada
| | - Greg L West
- Centre de Recherche en Neuropsychologie et Cognition, University of Montreal, Montreal, Quebec H3C 3J7, Canada
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59
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Hess A, Hinz R, Keliris GA, Boehm-Sturm P. On the Usage of Brain Atlases in Neuroimaging Research. Mol Imaging Biol 2019; 20:742-749. [PMID: 30094652 DOI: 10.1007/s11307-018-1259-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Brain atlases play a key role in modern neuroimaging analysis of brain structure and function. We review available atlas databases for humans and animals and illustrate common state-of-the-art workflows in neuroimaging research based on image registration. Advances in noninvasive imaging methods, 3D ex vivo microscopy, and image processing are summarized which will eventually close the current resolution gap between brain atlases based on conventional 2D histology and those based on 3D in vivo imaging.
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Affiliation(s)
- Andreas Hess
- Institute for Experimental Pharmacology, Friedrich Alexander University Erlangen Nuremberg, Fahrstraße 17, 91054, Erlangen, Germany.
| | - Rukun Hinz
- Bio-Imaging Lab, University of Antwerp, Antwerp, Belgium
| | | | - Philipp Boehm-Sturm
- Department of Experimental Neurology and Center for Stroke Research Berlin, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany. .,NeuroCure Cluster of Excellence and Charité Core Facility 7T Experimental MRIs, Charité - Universitätsmedizin Berlin, Berlin, Germany.
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60
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Zapara TA, Romashchenko AV, Proskura AL, Ratushnyak AS. Effect of physical activity on structural asymmetry of mouse hippocampus. Vavilovskii Zhurnal Genet Selektsii 2019. [DOI: 10.18699/vj18.454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The relevance of studies of adult neurogenesis is evident in connection with the potential use of these new neurons to replace neurons lost in the process of life. Despite considerable efforts, little is known about the fnal fate of these cells, the functional signifcance of their connections and the regulation of their development. It is known that physical activity signifcantly increases the number of fssile progenitors, the precursors of new neurons in the dentate gyrus of the hippocampus. The existing immunohistochemical methods for labeling new neurons do not allow tracing the temporal dynamics of changes in the volume of brain structures in the same animal, induced by external impacts, such as voluntary exercise. This makes it an urgent task to develop and improve methods for longterm control of changes that occur in the adult hippocampus due to the induction of neurogenesis. The main purpose of this work was to noninvasively track, by using magnetic resonance imaging (MRI), the temporal dynamics of changes in the volume of the hippocampus in the same animals that had voluntary physical activity. It was found that voluntary exercise did not change the total volume of the mouse hippocampus. However, the difference in the volume ratio between the right and left parts of the hippocampus was signifcantly lower compared with the control group. The reconstruction and analysis of proteinprotein interactions that ensure the survival of a large number of new neurons and their integration into existing neural networks in the hippocampus have been carried out. The proposed approach allows the noninvasive registration of changes in the ratio of the volumes of these paired brain structures.
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Affiliation(s)
- T. A. Zapara
- The Institute of Computational Technologies, SB RAS
| | - A. V. Romashchenko
- The Institute of Computational Technologies, SB RAS; Institute of Cytology and Genetics, SB RAS
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61
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Crespi C, Laureiro-Martínez D, Dodich A, Cappa SF, Brusoni S, Zollo M, Falini A, Canessa N. Improving innovative decision-making: Training-induced changes in fronto-parietal networks. Brain Cogn 2018; 128:46-55. [DOI: 10.1016/j.bandc.2018.11.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 08/01/2018] [Accepted: 11/06/2018] [Indexed: 01/09/2023]
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62
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Spencer Noakes TL, Przybycien TS, Forwell A, Nicholls C, Zhou YQ, Butcher DT, Weksberg R, Guger SL, Spiegler BJ, Schachar RJ, Hitzler J, Ito S, van der Plas E, Nieman BJ. Brain Development and Heart Function after Systemic Single-Agent Chemotherapy in a Mouse Model of Childhood Leukemia Treatment. Clin Cancer Res 2018; 24:6040-6052. [PMID: 30054283 DOI: 10.1158/1078-0432.ccr-18-0551] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 06/19/2018] [Accepted: 07/24/2018] [Indexed: 11/16/2022]
Abstract
PURPOSE Chemotherapy for childhood acute lymphoblastic leukemia (ALL) can cause late-appearing side effects in survivors that affect multiple organs, including the heart and brain. However, the complex ALL treatment regimen makes it difficult to isolate the causes of these side effects and impossible to separate the contributions of individual chemotherapy agents by clinical observation. Using a mouse model, we therefore assessed each of eight representative, systemically-administered ALL chemotherapy agents for their impact on postnatal brain development and heart function. EXPERIMENTAL DESIGN Mice were treated systemically with a single chemotherapy agent at an infant equivalent age, then allowed to age to early adulthood (9 weeks). Cardiac structure and function were assessed using in vivo high-frequency ultrasound, and brain anatomy was assessed using high-resolution volumetric ex vivo MRI. In addition, longitudinal in vivo MRI was used to determine the time course of developmental change after vincristine treatment. RESULTS Vincristine, doxorubicin, and methotrexate were observed to produce the greatest deficiencies in brain development as determined by volumes measured on MRI, whereas doxorubicin, methotrexate, and l-asparaginase altered heart structure or function. Longitudinal studies of vincristine revealed widespread volume loss immediately following treatment and impaired growth over time in several brain regions. CONCLUSIONS Multiple ALL chemotherapy agents can affect postnatal brain development or heart function. This study provides a ranking of agents based on potential toxicity, and thus highlights a subset likely to cause side effects in early adulthood for further study.
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Affiliation(s)
- T Leigh Spencer Noakes
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.
- Translational Medicine, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
| | - Thomas S Przybycien
- Haematology/Oncology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Amanda Forwell
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
- The University of Waterloo, Waterloo, Ontario, Canada
| | - Connor Nicholls
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
- The University of Waterloo, Waterloo, Ontario, Canada
| | - Yu-Qing Zhou
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
- Ted Rogers Centre for Heart Research, Translational Biology and Engineering Program, The University of Toronto, Ontario, Canada
| | - Darci T Butcher
- Genetics & Genome Biology, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
| | - Rosanna Weksberg
- Haematology/Oncology, The Hospital for Sick Children, Toronto, Ontario, Canada
- Genetics & Genome Biology, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
- Clinical and Metabolic Genetics, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
- Department of Molecular Genetics, The University of Toronto, Toronto, Ontario, Canada
- Institute of Medical Sciences, The University of Toronto, Toronto, Ontario, Canada
| | - Sharon L Guger
- Department of Molecular Genetics, The University of Toronto, Toronto, Ontario, Canada
| | - Brenda J Spiegler
- Department of Psychology, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Pediatrics, Faculty of Medicine, The University of Toronto, Toronto, Ontario, Canada
| | - Russell J Schachar
- Department of Psychiatry, The Hospital for Sick Children, Toronto, Ontario, Canada
- Psychiatry Research, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Johann Hitzler
- Translational Medicine, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
- Department of Pediatrics, Faculty of Medicine, The University of Toronto, Toronto, Ontario, Canada
- Development and Stem Cell Biology, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
| | - Shinya Ito
- Translational Medicine, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
- Clinical Pharmacology and Toxicology, The Hospital for Sick Children, Toronto, Ontario, Canada
- Pharmacology and Toxicology, Faculty of Medicine, The University of Toronto, Toronto, Ontario, Canada
| | - Ellen van der Plas
- Department of Psychiatry, The University of Iowa Hospital and Clinics, Iowa City, Iowa
| | - Brian J Nieman
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
- Translational Medicine, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
- Neurosciences and Mental Health, The Hospital for Sick Children, Toronto, Ontario, Canada
- Ontario Institute for Cancer Research, Toronto, Ontario, Canada
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63
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Bernardoni F, King JA, Geisler D, Birkenstock J, Tam FI, Weidner K, Roessner V, White T, Ehrlich S. Nutritional Status Affects Cortical Folding: Lessons Learned From Anorexia Nervosa. Biol Psychiatry 2018; 84:692-701. [PMID: 29910027 DOI: 10.1016/j.biopsych.2018.05.008] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 04/11/2018] [Accepted: 05/01/2018] [Indexed: 01/01/2023]
Abstract
BACKGROUND Cortical folding is thought to remain relatively invariant after birth. Therefore, differences seen in psychiatric disorders have been proposed as early biomarkers or used as intermediate phenotypes in imaging genetics studies. Anorexia nervosa (AN) is associated with drastic and rapid structural brain alterations and thus may be an ideal model disorder to study environmental influences on cortical folding. METHODS To date, the only two studies in AN applied different methods (local gyrification index and mean curvature) and found seemingly discordant results. We computed both vertexwise measures in a sizable sample of acutely underweight female AN patients (n = 87, mean age 16.5 years), long-term recovered patients (n = 58, mean age 22 years), and healthy control participants (n = 141, mean age 19.5 years). The majority of acutely ill patients were scanned longitudinally (n = 57) again after partial weight normalization (>14% body mass index increase). RESULTS While gyrification was broadly reduced in acutely ill patients, normal values were restored in most brain regions after partial weight restoration (≈3 months), and after full recovery no significant differences were evident relative to control participants. Increased gyrification was largely predicted by weight restoration alone. Results for absolute mean curvature analyses complemented those obtained using the local gyrification index. CONCLUSIONS Together, these findings indicate that nutritional status affects cortical folding and suggest that gyrification studies may need to better control for environmental factors. Moreover, they provide novel support for the likelihood that macroscopic changes in the cortical organization in AN are more reflective of nutritional state than premorbid trait markers or permanent scars.
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Affiliation(s)
- Fabio Bernardoni
- Division of Psychological and Social Medicine and Developmental Neuroscience, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Joseph A King
- Division of Psychological and Social Medicine and Developmental Neuroscience, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Daniel Geisler
- Division of Psychological and Social Medicine and Developmental Neuroscience, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Julian Birkenstock
- Division of Psychological and Social Medicine and Developmental Neuroscience, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Friederike I Tam
- Division of Psychological and Social Medicine and Developmental Neuroscience, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Kerstin Weidner
- Department of Psychotherapy and Psychosomatic Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Veit Roessner
- Department of Child and Adolescent Psychiatry, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Tonya White
- Department of Child and Adolescent Psychiatry, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Stefan Ehrlich
- Division of Psychological and Social Medicine and Developmental Neuroscience, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany; Translational Developmental Neuroscience Section, Eating Disorder Research and Treatment Center, Department of Child and Adolescent Psychiatry, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.
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64
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Blanchette CA, Amirova J, Bohbot VD, West GL. Autistic traits in neurotypical individuals are associated with increased landmark use during navigation. Psych J 2018; 8:137-146. [PMID: 30294869 DOI: 10.1002/pchj.230] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Revised: 06/08/2018] [Accepted: 07/12/2018] [Indexed: 11/07/2022]
Abstract
People adopt two distinct learning strategies during navigation. "Spatial learners" navigate by building a cognitive map using environmental landmarks, and display more grey matter in the hippocampus. Conversely, "response learners" memorize a series of rigid turns to navigate and display more grey matter in the caudate nucleus of the striatum. Evidence has linked these two structures with autism spectrum disorder (ASD) and autistic traits in non-clinical populations. Both people with ASD and neurotypical people with higher levels of autistic traits have been shown to display more grey matter in the hippocampus and less functional activity in the caudate nucleus. We therefore tested 56 healthy participants who completed the Autism Quotient (AQ) Scale and the 4-on-8 Virtual Maze (4/8 VM), which determines the reliance on landmarks during navigation. We found that people who relied on landmarks during navigation also displayed significantly higher scores on the AQ Scale. Because spatial strategies are associated with increased attention to environmental landmark use and are supported by the hippocampus, our results provide a potential behavioral mechanism linking higher autistic traits (e.g., increased attention to detail and increased sensory processes) to increased hippocampal grey matter.
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Affiliation(s)
| | - Jamila Amirova
- Department of Psychology, University of Montreal, Montreal, Canada
| | - Veronique D Bohbot
- Department of Psychiatry, Douglas Hospital Research Centre, McGill University, Verdun, Canada
| | - Greg L West
- Department of Psychology, University of Montreal, Montreal, Canada
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65
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Aumont É, Bohbot VD, West GL. Spatial learners display enhanced oculomotor performance. JOURNAL OF COGNITIVE PSYCHOLOGY 2018. [DOI: 10.1080/20445911.2018.1526178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Étienne Aumont
- Department of Psychology, University of Montreal, Montreal, Canada
| | | | - Gregory L. West
- Department of Psychology, University of Montreal, Montreal, Canada
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66
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Wang M, Dong G, Wang L, Zheng H, Potenza MN. Brain responses during strategic online gaming of varying proficiencies: Implications for better gaming. Brain Behav 2018; 8:e01076. [PMID: 30020566 PMCID: PMC6085917 DOI: 10.1002/brb3.1076] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 06/21/2018] [Accepted: 06/25/2018] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Online gaming is a complex and competitive activity. However, little attention has been paid to brain activities relating to gaming proficiency. METHODS In the current study, fMRI data were obtained from 70 subjects while they were playing online games. Based on their playing, we selected 24 clips from each subject for three levels of gaming proficiency (good, poor, and average), with each clip lasting for 8 seconds. RESULTS When comparing the brain responses during the three conditions, good-play trials, relative to poor- or average-play trials, were associated with greater activation of the declive, postcentral gyrus, and striatum. In post-hoc analyses taking the identified clusters as regions of interest to calculate their functional connectivity, activation of the declive during good-play conditions was associated with that in the precentral gyrus and thalamus, and activation in the striatum was associated with that in the inferior frontal gyrus and middle frontal cortex. CONCLUSIONS Taken together, findings suggest specific regional brain activations and functional connectivity patterns involving brain regions and circuits involved in sensory, motor, automatic and executive functioning and their coordination are associated with better gaming. Specifically, for basic functions, such as simple reaction, motor control, and motor coordination, people need to perform them automatically; for highly cognitive functions, such as plan and strategic playing, people need to engage more executive functions in finishing these works. The automatically processed basic functions spare cognitive resources for the highly cognitive functions, which facilitates their gaming behaviors.
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Affiliation(s)
- Min Wang
- Department of Psychology, Zhejiang Normal University, Jinhua, China
| | - Guangheng Dong
- Department of Psychology, Zhejiang Normal University, Jinhua, China.,Institute of Psychological and Brain Sciences, Zhejiang Normal University, Jinhua, China
| | - Lingxiao Wang
- CAS Key Laboratory of Behavioral Science, Institute of Psychology, Beijing, China
| | - Hui Zheng
- Department of Psychology, Zhejiang Normal University, Jinhua, China
| | - Marc N Potenza
- Department of Psychiatry, Department of Neurobiology, Child Study Center, and National Center on Addiction and Substance Abuse, Yale University School of Medicine, New Haven, Connecticut.,Connecticut Mental Health Center, New Haven, Connecticut
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67
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Sampaio-Baptista C, Sanders ZB, Johansen-Berg H. Structural Plasticity in Adulthood with Motor Learning and Stroke Rehabilitation. Annu Rev Neurosci 2018; 41:25-40. [DOI: 10.1146/annurev-neuro-080317-062015] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The development of advanced noninvasive techniques to image the human brain has enabled the demonstration of structural plasticity during adulthood in response to motor learning. Understanding the basic mechanisms of structural plasticity in the context of motor learning is essential to improve motor rehabilitation in stroke patients. Here, we review and discuss the emerging evidence for motor-learning-related structural plasticity and the implications for stroke rehabilitation. In the clinical context, a few studies have started to assess the effects of rehabilitation on structural measures to understand recovery poststroke and additionally to predict intervention outcomes. Structural imaging will likely have a role in the future in providing measures that inform patient stratification for optimal outcomes.
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Affiliation(s)
- Cassandra Sampaio-Baptista
- Wellcome Centre for Integrative Neuroimaging, Oxford Centre for Functional MRI of the Brain, Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, United Kingdom;,
| | - Zeena-Britt Sanders
- Wellcome Centre for Integrative Neuroimaging, Oxford Centre for Functional MRI of the Brain, Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, United Kingdom;,
| | - Heidi Johansen-Berg
- Wellcome Centre for Integrative Neuroimaging, Oxford Centre for Functional MRI of the Brain, Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, United Kingdom;,
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68
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Mouse MRI shows brain areas relatively larger in males emerge before those larger in females. Nat Commun 2018; 9:2615. [PMID: 29976930 PMCID: PMC6033927 DOI: 10.1038/s41467-018-04921-2] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 06/04/2018] [Indexed: 01/08/2023] Open
Abstract
Sex differences exist in behaviors, disease and neuropsychiatric disorders. Sexual dimorphisms however, have yet to be studied across the whole brain and across a comprehensive time course of postnatal development. Here, we use manganese-enhanced MRI (MEMRI) to longitudinally image male and female C57BL/6J mice across 9 time points, beginning at postnatal day 3. We recapitulate findings on canonically dimorphic areas, demonstrating MEMRI’s ability to study neuroanatomical sex differences. We discover, upon whole-brain volume correction, that neuroanatomical regions larger in males develop earlier than those larger in females. Groups of areas with shared sexually dimorphic developmental trajectories reflect behavioral and functional networks, and expression of genes involved with sex processes. Also, post-pubertal neuroanatomy is highly individualized, and individualization occurs earlier in males. Our results demonstrate the ability of MEMRI to reveal comprehensive developmental differences between male and female brains, which will improve our understanding of sex-specific predispositions to various neuropsychiatric disorders. Sex differences occur in various aspects of neurodevelopment. Here the authors use manganese-enhanced MRI at nine different postnatal stages to detail the development of structural sex differences in the mouse brain.
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69
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Impact of video games on plasticity of the hippocampus. Mol Psychiatry 2018; 23:1566-1574. [PMID: 28785110 DOI: 10.1038/mp.2017.155] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 06/05/2017] [Accepted: 06/07/2017] [Indexed: 01/18/2023]
Abstract
The hippocampus is critical to healthy cognition, yet results in the current study show that action video game players have reduced grey matter within the hippocampus. A subsequent randomised longitudinal training experiment demonstrated that first-person shooting games reduce grey matter within the hippocampus in participants using non-spatial memory strategies. Conversely, participants who use hippocampus-dependent spatial strategies showed increased grey matter in the hippocampus after training. A control group that trained on 3D-platform games displayed growth in either the hippocampus or the functionally connected entorhinal cortex. A third study replicated the effect of action video game training on grey matter in the hippocampus. These results show that video games can be beneficial or detrimental to the hippocampal system depending on the navigation strategy that a person employs and the genre of the game.
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70
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Momi D, Smeralda C, Sprugnoli G, Ferrone S, Rossi S, Rossi A, Di Lorenzo G, Santarnecchi E. Acute and long-lasting cortical thickness changes following intensive first-person action videogame practice. Behav Brain Res 2018; 353:62-73. [PMID: 29944915 DOI: 10.1016/j.bbr.2018.06.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 06/01/2018] [Accepted: 06/18/2018] [Indexed: 12/16/2022]
Abstract
Recent evidence shows how an extensive gaming experience might positively impact cognitive and perceptual functioning, leading to brain structural changes observed in cross-sectional studies. Importantly, changes seem to be game-specific, reflecting gameplay styles and therefore opening to the possibility of tailoring videogames according to rehabilitation and enhancement purposes. However, whether if such brain effects can be induced even with limited gaming experience, and whether if they can outlast the gaming period, is still unknown. Here we quantified both cognitive and grey matter thickness changes following 15 daily gaming sessions based on a modified version of a 3D first-person shooter (FPS) played in laboratory settings. Twenty-nine healthy participants were randomly assigned to a control or a gaming group and underwent a cognitive assessment, an in-game performance evaluation and structural magnetic resonance imaging before (T0), immediately after (T1) and three months after the end of the experiment (T2). At T1, a significant increase in thickness of the bilateral parahippocampal cortex (PHC), somatosensory cortex (S1), superior parietal lobule (SPL) and right insula were observed. Changes in S1 matched the hand representation bilaterally, while PHC changes corresponded to the parahippocampal place area (PPA). Surprisingly, changes in thickness were still present at T2 for S1, PHC, SPL and right insula as compared to T0. Finally, surface-based regression identified the lingual gyrus as the best predictor of changes in game performance at T1. Results stress the specific impact of core game elements, such as spatial navigation and visuomotor coordination on structural brain properties, with effects outlasting even a short intensive gaming period.
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Affiliation(s)
- Davide Momi
- Brain Investigation & Neuromodulation Lab, Department of Medicine, Surgery and Neuroscience, Neurology and Clinical Neurophysiology Section, University of Siena, Italy
| | - Carmelo Smeralda
- Brain Investigation & Neuromodulation Lab, Department of Medicine, Surgery and Neuroscience, Neurology and Clinical Neurophysiology Section, University of Siena, Italy
| | - Giulia Sprugnoli
- Brain Investigation & Neuromodulation Lab, Department of Medicine, Surgery and Neuroscience, Neurology and Clinical Neurophysiology Section, University of Siena, Italy
| | - Salvatore Ferrone
- Brain Investigation & Neuromodulation Lab, Department of Medicine, Surgery and Neuroscience, Neurology and Clinical Neurophysiology Section, University of Siena, Italy
| | - Simone Rossi
- Brain Investigation & Neuromodulation Lab, Department of Medicine, Surgery and Neuroscience, Neurology and Clinical Neurophysiology Section, University of Siena, Italy; Siena Robotics and Systems Lab (SIRS-Lab), Engineering and Mathematics Department, University of Siena, Italy; Human Physiology Section, Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy; Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy
| | - Alessandro Rossi
- Brain Investigation & Neuromodulation Lab, Department of Medicine, Surgery and Neuroscience, Neurology and Clinical Neurophysiology Section, University of Siena, Italy; Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy
| | - Giorgio Di Lorenzo
- Laboratory of Psychophysiology, Chair of Psychiatry, Department of Systems Medicine, University of Rome "Tor Vergata", Rome, Italy
| | - Emiliano Santarnecchi
- Brain Investigation & Neuromodulation Lab, Department of Medicine, Surgery and Neuroscience, Neurology and Clinical Neurophysiology Section, University of Siena, Italy; Berenson-Allen Center for Non-Invasive Brain Stimulation, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
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71
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Early effects of a high-caloric diet and physical exercise on brain volumetry and behavior: a combined MRI and histology study in mice. Brain Imaging Behav 2018; 11:1385-1396. [PMID: 27734300 PMCID: PMC5653704 DOI: 10.1007/s11682-016-9638-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Excessive intake of high-caloric diets as well as subsequent development of obesity and diabetes mellitus may exert a wide range of unfavorable effects on the central nervous system (CNS) in the long-term. The potentially harmful effects of such diets were suggested to be mitigated by physical exercise. Here, we conducted a study investigating early effects of a cafeteria-diet on gray and white brain matter volume by means of voxel-based morphometry (VBM) and region-of-interest (ROI) analysis. Half of the mice performed voluntary wheel running to study if regular physical exercise prevents unfavorable effects of a cafeteria-diet. In addition, histological analyses for myelination and neurogenesis were performed. As expected, wheel running resulted in a significant increase of gray matter volume in the CA1-3 areas, the dentate gyrus and stratum granulosum of the hippocampus in the VBM analysis, while a positive effect of the cafeteria-diet was shown for the whole hippocampal CA1-3 area only in the ROI analysis, indicating a regional volume effect. It was earlier found that hippocampal neurogenesis may be related to volume increases after exercise. Interestingly, while running resulted in a significant increase in neurogenesis assessed by doublecortin (DCX)-labeling, this was not true for cafeteria diet. This indicates different underlying mechanisms for gray matter increase. Moreover, animals receiving cafeteria diet only showed mild deficits in long-term memory assessed by the puzzle-box paradigm, while executive functioning and short term memory were not affected. Our data therefore highlight that high caloric diet impacts on the brain and behavior. Physical exercise seems not to interact with these mechanisms.
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72
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Kodama M, Ono T, Yamashita F, Ebata H, Liu M, Kasuga S, Ushiba J. Structural Gray Matter Changes in the Hippocampus and the Primary Motor Cortex on An-Hour-to-One- Day Scale Can Predict Arm-Reaching Performance Improvement. Front Hum Neurosci 2018; 12:209. [PMID: 29988447 PMCID: PMC6024594 DOI: 10.3389/fnhum.2018.00209] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 05/04/2018] [Indexed: 11/13/2022] Open
Abstract
Recent studies have revealed rapid (e.g., hours to days) training-induced cortical structural changes using magnetic resonance imaging (MRI). Currently, there is great interest in studying how such a rapid brain structural change affects behavioral improvement. Structural reorganization contributes to memory or enhanced information processing in the brain and may increase its capability of skill learning. If the gray matter (GM) is capable of such rapid structural reorganization upon training, the extent of volume increase may characterize the learning process. To shed light on this issue, we conducted a case series study of 5-day visuomotor learning using neuroanatomical imaging, and analyzed the effect of rapid brain structural change on motor performance improvement via regression analysis. Participants performed an upper-arm reaching task under left-right mirror-reversal for five consecutive days; T1-weighted MR imaging was performed before training, after the first and fifth days, and 1 week and 1 month after training. We detected increase in GM volume on the first day (i.e., a few hours after the first training session) in the primary motor cortex (M1), primary sensory cortex (S1), and in the hippocampal areas. Notably, regression analysis revealed that individual differences in such short-term increases were associated with the learning levels after 5 days of training. These results suggest that GM structural changes are not simply a footprint of previous motor learning but have some relationship with future motor learning. In conclusion, the present study provides new insight into the role of structural changes in causing functional changes during motor learning.
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Affiliation(s)
- Midori Kodama
- Graduate School of Science and Technology, Keio University, Yokohama, Japan
| | - Takashi Ono
- Saiseikai Higashikanagawa Rehabilitation Hospital, Yokohama, Japan
| | - Fumio Yamashita
- Institute for Biomedical Sciences, Iwate Medical University, Iwate, Japan
| | - Hiroki Ebata
- Saiseikai Higashikanagawa Rehabilitation Hospital, Yokohama, Japan
| | - Meigen Liu
- Department of Rehabilitation Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Shoko Kasuga
- Graduate School of Science and Technology, Keio University, Yokohama, Japan.,Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada.,Keio Institute of Pure and Applied Sciences, Yokohama, Japan
| | - Junichi Ushiba
- Department of Rehabilitation Medicine, Keio University School of Medicine, Tokyo, Japan.,Keio Institute of Pure and Applied Sciences, Yokohama, Japan.,Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, Yokohama, Japan
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73
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Yee Y, Fernandes DJ, French L, Ellegood J, Cahill LS, Vousden DA, Spencer Noakes L, Scholz J, van Eede MC, Nieman BJ, Sled JG, Lerch JP. Structural covariance of brain region volumes is associated with both structural connectivity and transcriptomic similarity. Neuroimage 2018; 179:357-372. [PMID: 29782994 DOI: 10.1016/j.neuroimage.2018.05.028] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 04/13/2018] [Accepted: 05/10/2018] [Indexed: 12/14/2022] Open
Abstract
An organizational pattern seen in the brain, termed structural covariance, is the statistical association of pairs of brain regions in their anatomical properties. These associations, measured across a population as covariances or correlations usually in cortical thickness or volume, are thought to reflect genetic and environmental underpinnings. Here, we examine the biological basis of structural volume covariance in the mouse brain. We first examined large scale associations between brain region volumes using an atlas-based approach that parcellated the entire mouse brain into 318 regions over which correlations in volume were assessed, for volumes obtained from 153 mouse brain images via high-resolution MRI. We then used a seed-based approach and determined, for 108 different seed regions across the brain and using mouse gene expression and connectivity data from the Allen Institute for Brain Science, the variation in structural covariance data that could be explained by distance to seed, transcriptomic similarity to seed, and connectivity to seed. We found that overall, correlations in structure volumes hierarchically clustered into distinct anatomical systems, similar to findings from other studies and similar to other types of networks in the brain, including structural connectivity and transcriptomic similarity networks. Across seeds, this structural covariance was significantly explained by distance (17% of the variation, up to a maximum of 49% for structural covariance to the visceral area of the cortex), transcriptomic similarity (13% of the variation, up to maximum of 28% for structural covariance to the primary visual area) and connectivity (15% of the variation, up to a maximum of 36% for structural covariance to the intermediate reticular nucleus in the medulla) of covarying structures. Together, distance, connectivity, and transcriptomic similarity explained 37% of structural covariance, up to a maximum of 63% for structural covariance to the visceral area. Additionally, this pattern of explained variation differed spatially across the brain, with transcriptomic similarity playing a larger role in the cortex than subcortex, while connectivity explains structural covariance best in parts of the cortex, midbrain, and hindbrain. These results suggest that both gene expression and connectivity underlie structural volume covariance, albeit to different extents depending on brain region, and this relationship is modulated by distance.
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Affiliation(s)
- Yohan Yee
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada; Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.
| | - Darren J Fernandes
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada; Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Leon French
- Centre for Addiction and Mental Health, Toronto, Ontario, Canada; Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada; Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
| | - Jacob Ellegood
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Lindsay S Cahill
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Dulcie A Vousden
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada; Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | | | - Jan Scholz
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Matthijs C van Eede
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Brian J Nieman
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada; Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - John G Sled
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada; Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Jason P Lerch
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada; Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
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74
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Repairing the brain with physical exercise: Cortical thickness and brain volume increases in long-term pediatric brain tumor survivors in response to a structured exercise intervention. NEUROIMAGE-CLINICAL 2018; 18:972-985. [PMID: 29876282 PMCID: PMC5987848 DOI: 10.1016/j.nicl.2018.02.021] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 12/23/2017] [Accepted: 02/21/2018] [Indexed: 12/03/2022]
Abstract
There is growing evidence that exercise induced experience dependent plasticity may foster structural and functional recovery following brain injury. We examined the efficacy of exercise training for neural and cognitive recovery in long-term pediatric brain tumor survivors treated with radiation. We conducted a controlled clinical trial with crossover of exercise training (vs. no training) in a volunteer sample of 28 children treated with cranial radiation for brain tumors (mean age = 11.5 yrs.; mean time since diagnosis = 5.7 yrs). The endpoints were anatomical T1 MRI data and multiple behavioral outcomes presenting a broader analysis of structural MRI data across the entire brain. This included an analysis of changes in cortical thickness and brain volume using automated, user unbiased approaches. A series of general linear mixed effects models evaluating the effects of exercise training on cortical thickness were performed in a voxel and vertex-wise manner, as well as for specific regions of interest. In exploratory analyses, we evaluated the relationship between changes in cortical thickness after exercise with multiple behavioral outcomes, as well as the relation of these measures at baseline. Exercise was associated with increases in cortical thickness within the right pre and postcentral gyri. Other notable areas of increased thickness related to training were present in the left pre and postcentral gyri, left temporal pole, left superior temporal gyrus, and left parahippocampal gyrus. Further, we observed that compared to a separate cohort of healthy children, participants displayed multiple areas with a significantly thinner cortex prior to training and fewer differences following training, indicating amelioration of anatomical deficits. Partial least squares analysis (PLS) revealed specific patterns of relations between cortical thickness and various behavioral outcomes both after training and at baseline. Overall, our results indicate that exercise training in pediatric brain tumor patients treated with radiation has a beneficial impact on brain structure. We argue that exercise training should be incorporated into the development of neuro-rehabilitative treatments for long-term pediatric brain tumor survivors and other populations with acquired brain injury. (ClinicalTrials.gov, NCT01944761) Exercise training in pediatric brain tumor patients treated with radiation results in changes in brain structure Exercise was associated with increased cortical thickness in several areas including motor and somatosensory cortex Fewer differences between patients and healthy controls in cortical thickness were seen following exercise training Specific patterns of relations between cortical thickness and behavior at a baseline and after exercise training were seen
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75
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Structural Neuroimaging of Anorexia Nervosa: Future Directions in the Quest for Mechanisms Underlying Dynamic Alterations. Biol Psychiatry 2018; 83:224-234. [PMID: 28967386 PMCID: PMC6053269 DOI: 10.1016/j.biopsych.2017.08.011] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 07/21/2017] [Accepted: 08/14/2017] [Indexed: 02/07/2023]
Abstract
Anorexia nervosa (AN) is a serious eating disorder characterized by self-starvation and extreme weight loss. Pseudoatrophic brain changes are often readily visible in individual brain scans, and AN may be a valuable model disorder to study structural neuroplasticity. Structural magnetic resonance imaging studies have found reduced gray matter volume and cortical thinning in acutely underweight patients to normalize following successful treatment. However, some well-controlled studies have found regionally greater gray matter and persistence of structural alterations following long-term recovery. Findings from diffusion tensor imaging studies of white matter integrity and connectivity are also inconsistent. Furthermore, despite the severity of AN, the number of existing structural neuroimaging studies is still relatively low, and our knowledge of the underlying cellular and molecular mechanisms for macrostructural brain changes is rudimentary. We critically review the current state of structural neuroimaging in AN and discuss the potential neurobiological basis of structural brain alterations in the disorder, highlighting impediments to progress, recent developments, and promising future directions. In particular, we argue for the utility of more standardized data collection, adopting a connectomics approach to understanding brain network architecture, employing advanced magnetic resonance imaging methods that quantify biomarkers of brain tissue microstructure, integrating data from multiple imaging modalities, strategic longitudinal observation during weight restoration, and large-scale data pooling. Our overarching objective is to motivate carefully controlled research of brain structure in eating disorders, which will ultimately help predict therapeutic response and improve treatment.
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76
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Pfuhl G, King JA, Geisler D, Roschinski B, Ritschel F, Seidel M, Bernardoni F, Müller DK, White T, Roessner V, Ehrlich S. Preserved white matter microstructure in young patients with anorexia nervosa? Hum Brain Mapp 2018; 37:4069-4083. [PMID: 27400772 DOI: 10.1002/hbm.23296] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 06/13/2016] [Accepted: 06/15/2016] [Indexed: 02/06/2023] Open
Abstract
A massive but reversible reduction of cortical thickness and subcortical gray matter (GM) volumes in Anorexia Nervosa (AN) has been recently reported. However, the literature on alterations in white matter (WM) volume and microstructure changes in both acutely underweight AN (acAN) and after recovery (recAN) is sparse and results are inconclusive. Here, T1-weighted and diffusion-weighted MRI data in a sizable sample of young and medication-free acAN (n = 35), recAN (n = 32), and age-matched female healthy controls (HC, n = 62) were obtained. For analysis, a well-validated global probabilistic tractography reconstruction algorithm including rigorous motion correction implemented in FreeSurfer: TRACULA (TRActs Constrained by UnderLying Anatomy) were used. Additionally, a clustering algorithm and a multivariate pattern classification technique to WM metrics to predict group membership were applied. No group differences in either WM volume or WM microstructure were detected with standard analysis procedures either in acAN or recAN relative to HC after controlling for the number of performed statistical tests. These findings were not affected by age, IQ, or psychiatric symptoms. While cluster analysis was unsuccessful at discriminating between groups, multivariate pattern classification showed some ability to separate acAN from HC (but not recAN from HC). However, these results were not compatible with a straightforward hypothesis of impaired WM microstructure. The current findings suggest that WM integrity is largely preserved in non-chronic AN. This finding stands in contrast to findings in GM, but may help to explain the relatively intact cognitive performance of young patients with AN and provide the basis for the fast recovery of GM structures. Hum Brain Mapp 37:4069-4083, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Gerit Pfuhl
- Eating Disorders Research and Treatment Center at the Dept. of Child and Adolescent Psychiatry, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.,Department of Psychology, UiT the Arctic University of Norway & Department of Psychology, Norwegian University of Science and Technology, Trondheim, Norway
| | - Joseph A King
- Eating Disorders Research and Treatment Center at the Dept. of Child and Adolescent Psychiatry, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.,Division of Psychological and Social Medicine and Developmental Neurosciences, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Daniel Geisler
- Eating Disorders Research and Treatment Center at the Dept. of Child and Adolescent Psychiatry, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.,Division of Psychological and Social Medicine and Developmental Neurosciences, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Benjamin Roschinski
- Eating Disorders Research and Treatment Center at the Dept. of Child and Adolescent Psychiatry, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Franziska Ritschel
- Eating Disorders Research and Treatment Center at the Dept. of Child and Adolescent Psychiatry, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.,Division of Psychological and Social Medicine and Developmental Neurosciences, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Maria Seidel
- Eating Disorders Research and Treatment Center at the Dept. of Child and Adolescent Psychiatry, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.,Division of Psychological and Social Medicine and Developmental Neurosciences, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Fabio Bernardoni
- Eating Disorders Research and Treatment Center at the Dept. of Child and Adolescent Psychiatry, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.,Division of Psychological and Social Medicine and Developmental Neurosciences, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Dirk K Müller
- Department of Psychiatry and Neuroimaging Center, Technische Universität Dresden, Dresden, Germany
| | - Tonya White
- Department of Child and Adolescent Psychiatry & Department of Radiology, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - Veit Roessner
- Eating Disorders Research and Treatment Center at the Dept. of Child and Adolescent Psychiatry, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Stefan Ehrlich
- Eating Disorders Research and Treatment Center at the Dept. of Child and Adolescent Psychiatry, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany. .,Division of Psychological and Social Medicine and Developmental Neurosciences, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany. .,MGH/MIT/HMS Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts. .,Harvard Medical School, Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts.
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Szabó N, Faragó P, Király A, Veréb D, Csete G, Tóth E, Kocsis K, Kincses B, Tuka B, Párdutz Á, Szok D, Tajti J, Vécsei L, Kincses ZT. Evidence for Plastic Processes in Migraine with Aura: A Diffusion Weighted MRI Study. Front Neuroanat 2018; 11:138. [PMID: 29387002 PMCID: PMC5776127 DOI: 10.3389/fnana.2017.00138] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2017] [Accepted: 12/26/2017] [Indexed: 01/03/2023] Open
Abstract
Background: Formerly white matter abnormalities in a mixed group of migraine patients with and without aura were shown. Here, we aimed to explore white matter alterations in a homogeneous group of migraineurs with aura and to delineate possible relationships between white matter changes and clinical variables. Methods: Eighteen patients with aura, 25 migraine patients without aura and 28 controls were scanned on a 1.5T MRI scanner. Diffusivity parameters of the white matter were estimated and compared between patients’ groups and controls using whole-brain tract-based spatial statistics. Results: Decreased radial diffusivity (p < 0.036) was found bilaterally in the parieto-occipital white matter, the corpus callosum, and the cingular white matter of migraine with aura (MwA) patients compared to controls. Migraine without aura (MwoA) patients showed no alteration compared to controls. MwA compared to MwoA showed increased fractional anisotropy (p < 0.048) in the left parieto-occipital white matter. In MwA a negative correlation was found between axial diffusivity and disease duration in the left superior longitudinal fascicle (left parieto-occipital region) and in the left corticospinal tract (p < 0.036) and with the number of the attacks in the right superior longitudinal fascicle (p < 0.048). Conclusion: We showed for the first time that there are white matter microstructural differences between these two subgroups of migraine and hence it is important to handle the two groups separately in further researches. We propose that degenerative and maladaptive plastic changes coexist in the disease and the diffusion profile is a result of these processes.
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Affiliation(s)
- Nikoletta Szabó
- Neuroimaging Research Group, Department of Neurology, Albert Szent-Györgyi Clinical Center, University of Szeged, Szeged, Hungary.,Central European Institute of Technology, Brno, Czechia
| | - Péter Faragó
- Neuroimaging Research Group, Department of Neurology, Albert Szent-Györgyi Clinical Center, University of Szeged, Szeged, Hungary.,Central European Institute of Technology, Brno, Czechia
| | - András Király
- Neuroimaging Research Group, Department of Neurology, Albert Szent-Györgyi Clinical Center, University of Szeged, Szeged, Hungary.,Central European Institute of Technology, Brno, Czechia
| | - Dániel Veréb
- Neuroimaging Research Group, Department of Neurology, Albert Szent-Györgyi Clinical Center, University of Szeged, Szeged, Hungary
| | - Gergő Csete
- Neuroimaging Research Group, Department of Neurology, Albert Szent-Györgyi Clinical Center, University of Szeged, Szeged, Hungary
| | - Eszter Tóth
- Neuroimaging Research Group, Department of Neurology, Albert Szent-Györgyi Clinical Center, University of Szeged, Szeged, Hungary
| | - Krisztián Kocsis
- Neuroimaging Research Group, Department of Neurology, Albert Szent-Györgyi Clinical Center, University of Szeged, Szeged, Hungary
| | - Bálint Kincses
- Neuroimaging Research Group, Department of Neurology, Albert Szent-Györgyi Clinical Center, University of Szeged, Szeged, Hungary
| | | | - Árpád Párdutz
- Neuroimaging Research Group, Department of Neurology, Albert Szent-Györgyi Clinical Center, University of Szeged, Szeged, Hungary
| | - Délia Szok
- Neuroimaging Research Group, Department of Neurology, Albert Szent-Györgyi Clinical Center, University of Szeged, Szeged, Hungary
| | - János Tajti
- Neuroimaging Research Group, Department of Neurology, Albert Szent-Györgyi Clinical Center, University of Szeged, Szeged, Hungary
| | - László Vécsei
- Neuroimaging Research Group, Department of Neurology, Albert Szent-Györgyi Clinical Center, University of Szeged, Szeged, Hungary.,MTA-SZTE Neuroscience Research Group, Szeged, Hungary
| | - Zsigmond T Kincses
- Neuroimaging Research Group, Department of Neurology, Albert Szent-Györgyi Clinical Center, University of Szeged, Szeged, Hungary
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Reversal of age-related cognitive impairments in mice by an extremely low dose of tetrahydrocannabinol. Neurobiol Aging 2018; 61:177-186. [DOI: 10.1016/j.neurobiolaging.2017.09.025] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 09/18/2017] [Accepted: 09/23/2017] [Indexed: 01/28/2023]
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79
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Playing Super Mario 64 increases hippocampal grey matter in older adults. PLoS One 2017; 12:e0187779. [PMID: 29211727 PMCID: PMC5718432 DOI: 10.1371/journal.pone.0187779] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 10/25/2017] [Indexed: 01/23/2023] Open
Abstract
Maintaining grey matter within the hippocampus is important for healthy cognition. Playing 3D-platform video games has previously been shown to promote grey matter in the hippocampus in younger adults. In the current study, we tested the impact of 3D-platform video game training (i.e., Super Mario 64) on grey matter in the hippocampus, cerebellum, and the dorsolateral prefrontal cortex (DLPFC) of older adults. Older adults who were 55 to 75 years of age were randomized into three groups. The video game experimental group (VID; n = 8) engaged in a 3D-platform video game training over a period of 6 months. Additionally, an active control group took a series of self-directed, computerized music (piano) lessons (MUS; n = 12), while a no-contact control group did not engage in any intervention (CON; n = 13). After training, a within-subject increase in grey matter within the hippocampus was significant only in the VID training group, replicating results observed in younger adults. Active control MUS training did, however, lead to a within-subject increase in the DLPFC, while both the VID and MUS training produced growth in the cerebellum. In contrast, the CON group displayed significant grey matter loss in the hippocampus, cerebellum and the DLPFC.
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80
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Wenger E, Brozzoli C, Lindenberger U, Lövdén M. Expansion and Renormalization of Human Brain Structure During Skill Acquisition. Trends Cogn Sci 2017; 21:930-939. [PMID: 29149999 PMCID: PMC5697733 DOI: 10.1016/j.tics.2017.09.008] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 09/13/2017] [Accepted: 09/14/2017] [Indexed: 12/17/2022]
Abstract
Research on human brain changes during skill acquisition has revealed brain volume expansion in task-relevant areas. However, the large number of skills that humans acquire during ontogeny militates against plasticity as a perpetual process of volume growth. Building on animal models and available theories, we promote the expansion-renormalization model for plastic changes in humans. The model predicts an initial increase of gray matter structure, potentially reflecting growth of neural resources like neurons, synapses, and glial cells, which is followed by a selection process operating on this new tissue leading to a complete or partial return to baseline of the overall volume after selection has ended. The model sheds new light on available evidence and current debates and fosters the search for mechanistic explanations.
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Affiliation(s)
- Elisabeth Wenger
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany.
| | - Claudio Brozzoli
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden; ImpAct Team, Neuroscience Research Centre of Lyon (CRNL), Lyon, France
| | - Ulman Lindenberger
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany; Max Planck UCL Centre for Computational Psychiatry and Ageing Research, Berlin, Germany; European University Institute, San Domenico di Fiesole (FI), Italy
| | - Martin Lövdén
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
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81
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Lee J, Choi S, Kang J, Won E, Tae WS, Lee MS, Ham BJ. Structural characteristics of the brain reward circuit regions in patients with bipolar I disorder: A voxel-based morphometric study. Psychiatry Res Neuroimaging 2017; 269:82-89. [PMID: 28963911 DOI: 10.1016/j.pscychresns.2017.09.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Revised: 08/11/2017] [Accepted: 09/18/2017] [Indexed: 12/30/2022]
Abstract
Bipolar I disorder (BD-I) is often misdiagnosed, leading to inadequate treatment and significant disability along with reduced quality of life. Recent neural models suggest that the reward circuitry is affected in bipolar disorder. The purpose of the present study was to identify structural abnormalities in the brain reward-processing neural circuitry among patients with BD-I. 21 patients with BD-I and 21 healthy controls (HC) participated in this study. Structural magnetic resonance imaging was performed. Region-of-interest (ROI) voxel-based morphometry analysis was applied to assess the presence of structural changes between the BD-I patient group and the control group. The results of the reward circuitry ROI analysis revealed lower gray matter volumes in the left ventromedial prefrontal cortex (VMPFC), left dorsomedial prefrontal cortex (DMPFC), and left ventrolateral prefrontal cortex (VLPFC) in patients with BD-I compared to HC. Our results suggest that abnormalities in the brain reward-processing neural circuitry, especially those in the left VMPFC, left DMPFC, and left VLPFC, may play an important role in the pathophysiology of BD-I.
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Affiliation(s)
- Junyong Lee
- Department of Psychiatry, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Sunyoung Choi
- Department of Brain and Cognitive Engineering, Korea University, Seoul, Republic of Korea
| | - June Kang
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea
| | - Eunsoo Won
- Department of Psychiatry, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Woo-Suk Tae
- Brain Convergence Research Center, Korea University Anam Hospital, Seoul, Republic of Korea
| | - Min-Soo Lee
- Department of Psychiatry, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea.
| | - Byung-Joo Ham
- Department of Psychiatry, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea; Brain Convergence Research Center, Korea University Anam Hospital, Seoul, Republic of Korea.
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82
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Hawkins PCT, Wood TC, Vernon AC, Bertolino A, Sambataro F, Dukart J, Merlo-Pich E, Risterucci C, Silber-Baumann H, Walsh E, Mazibuko N, Zelaya FO, Mehta MA. An investigation of regional cerebral blood flow and tissue structure changes after acute administration of antipsychotics in healthy male volunteers. Hum Brain Mapp 2017; 39:319-331. [PMID: 29058358 DOI: 10.1002/hbm.23844] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 09/13/2017] [Accepted: 10/02/2017] [Indexed: 01/05/2023] Open
Abstract
Chronic administration of antipsychotic drugs has been linked to structural brain changes observed in patients with schizophrenia. Recent MRI studies have shown rapid changes in regional brain volume following just a single dose of these drugs. However, it is not clear if these changes represent real volume changes or are artefacts ("apparent" volume changes) due to drug-induced physiological changes, such as increased cerebral blood flow (CBF). To address this, we examined the effects of a single, clinical dose of three commonly prescribed antipsychotics on quantitative measures of T1 and regional blood flow of the healthy human brain. Males (n = 42) were randomly assigned to one of two parallel groups in a double-blind, placebo-controlled, randomized, three-period cross-over study design. One group received a single oral dose of either 0.5 or 2 mg of risperidone or placebo during each visit. The other received olanzapine (7.5 mg), haloperidol (3 mg), or placebo. MR measures of quantitative T1, CBF, and T1-weighted images were acquired at the estimated peak plasma concentration of the drug. All three drugs caused localized increases in striatal blood flow, although drug and region specific effects were also apparent. In contrast, all assessments of T1 and brain volume remained stable across sessions, even in those areas experiencing large changes in CBF. This illustrates that a single clinically relevant oral dose of an antipsychotic has no detectable acute effect on T1 in healthy volunteers. We further provide a methodology for applying quantitative imaging methods to assess the acute effects of other compounds on structural MRI metrics. Hum Brain Mapp 39:319-331, 2018. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Peter C T Hawkins
- Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom
| | - Tobias C Wood
- Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom
| | - Anthony C Vernon
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom.,MRC Centre for Neurodevelopmental Disorders, King's College London, London, United Kingdom
| | - Alessandro Bertolino
- Department of Basic Medical Science, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari BA, Italy
| | - Fabio Sambataro
- Department of Experimental and Clinical Medical Sciences, University of Udine, Udine, Italy
| | - Juergen Dukart
- Translational Medicine Neuroscience and Biomarkers, F. Hoffmann-La Roche Ltd, Basel, Switzerland
| | - Emilio Merlo-Pich
- CNS Therapeutic Area Unit, Takeda Development Centre Europe, London, United Kingdom
| | - Celine Risterucci
- Pharma Research and Early Development, F. Hoffmann-La Roche Ltd, Basel, Switzerland
| | - Hanna Silber-Baumann
- Pharma Research and Early Development, F. Hoffmann-La Roche Ltd, Basel, Switzerland
| | - Eamonn Walsh
- Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, United Kingdom
| | - Ndabezinhle Mazibuko
- Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom
| | - Fernando O Zelaya
- Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom
| | - Mitul A Mehta
- Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom
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Spatial gene expression analysis of neuroanatomical differences in mouse models. Neuroimage 2017; 163:220-230. [PMID: 28882630 DOI: 10.1016/j.neuroimage.2017.08.065] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Revised: 08/08/2017] [Accepted: 08/29/2017] [Indexed: 02/06/2023] Open
Abstract
MRI is a powerful modality to detect neuroanatomical differences that result from mutations and treatments. Knowing which genes drive these differences is important in understanding etiology, but candidate genes are often difficult to identify. We tested whether spatial gene expression data from the Allen Brain Institute can be used to inform us about genes that cause neuroanatomical differences. For many single-gene-mutation mouse models, we found that affected neuroanatomy was not strongly associated with the spatial expression of the altered gene and there are specific caveats for each model. However, among models with significant neuroanatomical differences from their wildtype controls, the mutated genes had preferential spatial expression in affected neuroanatomy. In mice exposed to environmental enrichment, candidate genes could be identified by a genome-wide search for genes with preferential spatial expression in the altered neuroanatomical regions. These candidates have functions related to learning and plasticity. We demonstrate that spatial gene expression of single-genes is a poor predictor of altered neuroanatomy, but altered neuroanatomy can identify candidate genes responsible for neuroanatomical phenotypes.
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Seminowicz DA, Moayedi M. The Dorsolateral Prefrontal Cortex in Acute and Chronic Pain. THE JOURNAL OF PAIN 2017; 18:1027-1035. [PMID: 28400293 PMCID: PMC5581265 DOI: 10.1016/j.jpain.2017.03.008] [Citation(s) in RCA: 259] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 03/15/2017] [Accepted: 03/20/2017] [Indexed: 02/06/2023]
Abstract
The dorsolateral prefrontal cortex (DLPFC) is a functionally and structurally heterogeneous region and a key node of several brain networks, implicated in cognitive, affective, and sensory processing. As such, the DLPFC is commonly activated in experimental pain studies, and shows abnormally increased function in chronic pain populations. Furthermore, several studies have shown that some chronic pains are associated with decreased left DLPFC gray matter and that successful interventions can reverse this structural abnormality. In addition, studies have indicated that noninvasive stimulation of the left DLPFC effectively treats some chronic pains. In this article, we review the neuroimaging literature regarding the role of the DLPFC and its potential as a therapeutic target for chronic pain conditions, including studies showing the involvement of the DLPFC in encoding and modulating acute pain and studies demonstrating the reversal of DLPFC functional and structural abnormalities after successful interventions for chronic pain. We also review studies of noninvasive brain stimulation of the DLPFC showing acute pain modulation and some effectiveness as a treatment for certain chronic pain conditions. We further discuss the network architecture of the DLPFC, and postulate mechanisms by which DLPFC stimulation alleviates chronic pain. Future work testing these mechanisms will allow for more effective therapies. PERSPECTIVE The structure and function of the DLPFC is abnormal in some chronic pain conditions. Upon successful resolution of pain, these abnormalities are reversed. Understanding the underlying mechanisms and the role of this region can lead to the development of an effective therapeutic target for some chronic pain conditions.
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Affiliation(s)
- David A Seminowicz
- Department of Neural and Pain Sciences, University of Maryland, School of Dentistry, Baltimore, Maryland; Center to Advance Chronic Pain Research, University of Maryland Baltimore, Baltimore, Maryland.
| | - Massieh Moayedi
- Faculty of Dentistry, and University of Toronto Centre for the Study of Pain, University of Toronto, Toronto, Ontario, Canada
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85
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Holahan MR. A Shift from a Pivotal to Supporting Role for the Growth-Associated Protein (GAP-43) in the Coordination of Axonal Structural and Functional Plasticity. Front Cell Neurosci 2017; 11:266. [PMID: 28912688 PMCID: PMC5583208 DOI: 10.3389/fncel.2017.00266] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 08/18/2017] [Indexed: 11/14/2022] Open
Abstract
In a number of animal species, the growth-associated protein (GAP), GAP-43 (aka: F1, neuromodulin, B-50, G50, pp46), has been implicated in the regulation of presynaptic vesicular function and axonal growth and plasticity via its own biochemical properties and interactions with a number of other presynaptic proteins. Changes in the expression of GAP-43 mRNA or distribution of the protein coincide with axonal outgrowth as a consequence of neuronal damage and presynaptic rearrangement that would occur following instances of elevated patterned neural activity including memory formation and development. While functional enhancement in GAP-43 mRNA and/or protein activity has historically been hypothesized as a central mediator of axonal neuroplastic and regenerative responses in the central nervous system, it does not appear to be the crucial substrate sufficient for driving these responses. This review explores the historical discovery of GAP-43 (and associated monikers), its transcriptional, post-transcriptional and post-translational regulation and current understanding of protein interactions and regulation with respect to its role in axonal function. While GAP-43 itself appears to have moved from a pivotal to a supporting factor, there is no doubt that investigations into its functions have provided a clearer understanding of the biochemical underpinnings of axonal plasticity.
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86
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Lerch JP, van der Kouwe AJW, Raznahan A, Paus T, Johansen-Berg H, Miller KL, Smith SM, Fischl B, Sotiropoulos SN. Studying neuroanatomy using MRI. Nat Neurosci 2017; 20:314-326. [PMID: 28230838 DOI: 10.1038/nn.4501] [Citation(s) in RCA: 159] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 01/13/2017] [Indexed: 12/20/2022]
Abstract
The study of neuroanatomy using imaging enables key insights into how our brains function, are shaped by genes and environment, and change with development, aging and disease. Developments in MRI acquisition, image processing and data modeling have been key to these advances. However, MRI provides an indirect measurement of the biological signals we aim to investigate. Thus, artifacts and key questions of correct interpretation can confound the readouts provided by anatomical MRI. In this review we provide an overview of the methods for measuring macro- and mesoscopic structure and for inferring microstructural properties; we also describe key artifacts and confounds that can lead to incorrect conclusions. Ultimately, we believe that, although methods need to improve and caution is required in interpretation, structural MRI continues to have great promise in furthering our understanding of how the brain works.
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Affiliation(s)
- Jason P Lerch
- Program in Neuroscience and Mental Health, The Hospital for Sick Children, Toronto, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - André J W van der Kouwe
- Athinoula A. Martinos Center for Biomedical Research, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts, USA.,Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Armin Raznahan
- Developmental Neurogenomics Unit, Child Psychiatry Branch, National Institute of Mental Health, Bethesda, Maryland, USA
| | - Tomáš Paus
- Rotman Research Institute, Baycrest, Toronto, Canada.,Departments of Psychology and Psychiatry, University of Toronto, Toronto, Canada.,Center for the Developing Brain, Child Mind Institute, New York, New York, USA
| | - Heidi Johansen-Berg
- Oxford Centre for Functional MRI of the Brain (FMRIB), University of Oxford, Oxford, UK
| | - Karla L Miller
- Oxford Centre for Functional MRI of the Brain (FMRIB), University of Oxford, Oxford, UK
| | - Stephen M Smith
- Oxford Centre for Functional MRI of the Brain (FMRIB), University of Oxford, Oxford, UK
| | - Bruce Fischl
- Athinoula A. Martinos Center for Biomedical Research, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts, USA.,Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA.,Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
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87
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At least eighty percent of brain grey matter is modifiable by physical activity: A review study. Behav Brain Res 2017; 332:204-217. [DOI: 10.1016/j.bbr.2017.06.002] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 05/27/2017] [Accepted: 06/03/2017] [Indexed: 12/12/2022]
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88
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Allemang-Grand R, Ellegood J, Spencer Noakes L, Ruston J, Justice M, Nieman BJ, Lerch JP. Neuroanatomy in mouse models of Rett syndrome is related to the severity of Mecp2 mutation and behavioral phenotypes. Mol Autism 2017; 8:32. [PMID: 28670438 PMCID: PMC5485541 DOI: 10.1186/s13229-017-0138-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 04/26/2017] [Indexed: 01/25/2023] Open
Abstract
Background Rett syndrome (RTT) is a neurodevelopmental disorder that predominantly affects girls. The majority of RTT cases are caused by de novo mutations in methyl-CpG-binding protein 2 (MECP2), and several mouse models have been created to further understand the disorder. In the current literature, many studies have focused their analyses on the behavioral abnormalities and cellular and molecular impairments that arise from Mecp2 mutations. However, limited efforts have been placed on understanding how Mecp2 mutations disrupt the neuroanatomy and networks of the brain. Methods In this study, we examined the neuroanatomy of male and female mice from the Mecp2tm1Hzo, Mecp2tm1.1Bird/J, and Mecp2tm2Bird/J mouse lines using high-resolution magnetic resonance imaging (MRI) paired with deformation-based morphometry to determine the brain regions susceptible to Mecp2 disruptions. Results We found that many cortical and subcortical regions were reduced in volume within the brains of mutant mice regardless of mutation type, highlighting regions that are susceptible to Mecp2 disruptions. We also found that the volume within these regions correlated with behavioral metrics. Conversely, regions of the cerebellum were differentially affected by the type of mutation, showing an increase in volume in the mutant Mecp2tm1Hzo brain relative to controls and a decrease in the Mecp2tm1.1Bird/J and Mecp2tm2Bird/J lines. Conclusions Our findings demonstrate that the direction and magnitude of the neuroanatomical differences between control and mutant mice carrying Mecp2 mutations are driven by the severity of the mutation and the stage of behavioral impairments.
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Affiliation(s)
- Rylan Allemang-Grand
- Mouse Imaging Centre, 25 Orde Street, Toronto, M5T 3H7 Ontario Canada.,Neurosciences and Mental Health, Hospital for Sick Children, 555 University Ave, Toronto, M5G 1X8 Ontario Canada.,Department of Medical Biophysics, Faculty of Medicine, University of Toronto, 101 College Street, Suite 15-701, Toronto, M5G 1L7 Ontario Canada
| | - Jacob Ellegood
- Mouse Imaging Centre, 25 Orde Street, Toronto, M5T 3H7 Ontario Canada.,Neurosciences and Mental Health, Hospital for Sick Children, 555 University Ave, Toronto, M5G 1X8 Ontario Canada
| | - Leigh Spencer Noakes
- Mouse Imaging Centre, 25 Orde Street, Toronto, M5T 3H7 Ontario Canada.,Physiology and Experimental Medicine, Hospital for Sick Children, 555 University Ave, Toronto, M5G 1X8 Ontario Canada
| | - Julie Ruston
- Genetics and Genome Biology, Hospital for Sick Children, 555 University Ave, Toronto, M5G 1X8 Ontario Canada
| | - Monica Justice
- Genetics and Genome Biology, Hospital for Sick Children, 555 University Ave, Toronto, M5G 1X8 Ontario Canada
| | - Brian J Nieman
- Mouse Imaging Centre, 25 Orde Street, Toronto, M5T 3H7 Ontario Canada.,Department of Medical Biophysics, Faculty of Medicine, University of Toronto, 101 College Street, Suite 15-701, Toronto, M5G 1L7 Ontario Canada.,Ontario Institute of Cancer Research, 661 University Ave, Toronto, Suite 510, M5G 0A3 Ontario Canada
| | - Jason P Lerch
- Mouse Imaging Centre, 25 Orde Street, Toronto, M5T 3H7 Ontario Canada.,Neurosciences and Mental Health, Hospital for Sick Children, 555 University Ave, Toronto, M5G 1X8 Ontario Canada.,Department of Medical Biophysics, Faculty of Medicine, University of Toronto, 101 College Street, Suite 15-701, Toronto, M5G 1L7 Ontario Canada
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89
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Snyder JS, Cahill SP, Frankland PW. Running promotes spatial bias independently of adult neurogenesis. Hippocampus 2017; 27:871-882. [DOI: 10.1002/hipo.22737] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 04/07/2017] [Accepted: 04/12/2017] [Indexed: 01/09/2023]
Affiliation(s)
- Jason S. Snyder
- Department of Psychology & Djavad Mowafaghian Centre for Brain Health; University of British Columbia; Vancouver British Columbia Canada
| | - Shaina P. Cahill
- Department of Psychology & Djavad Mowafaghian Centre for Brain Health; University of British Columbia; Vancouver British Columbia Canada
| | - Paul W. Frankland
- Hospital for Sick Children; Program in Neurosciences & Mental Health, Peter Gilgan Centre for Research and Learning; Toronto Ontario Canada
- Department of Psychology; University of Toronto; Ontario Canada
- Department of Physiology; University of Toronto; Ontario Canada
- Institute of Medical Sciences; University of Toronto; Ontario Canada
- Child & Brain Development Program; Canadian Institute for Advanced Research; Toronto Ontario Canada
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90
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de Azevedo PC, Guimarães RP, Piccinin CC, Piovesana LG, Campos LS, Zuiani JR, Tamashiro EM, Pinheiro G, Amato-Filho AC, Cendes F, Lopes-Cendes I, D’Abreu A. Cerebellar Gray Matter Alterations in Huntington Disease: A Voxel-Based Morphometry Study. THE CEREBELLUM 2017; 16:923-928. [DOI: 10.1007/s12311-017-0865-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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91
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Hofstetter S, Assaf Y. The rapid development of structural plasticity through short water maze training: A DTI study. Neuroimage 2017; 155:202-208. [PMID: 28476661 DOI: 10.1016/j.neuroimage.2017.04.056] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 04/21/2017] [Accepted: 04/25/2017] [Indexed: 10/19/2022] Open
Abstract
Diffusion MRI is sensitive to the microstructure of tissue and allows the study of structural plasticity over short time scales of only hours. The initial temporal and spatial progression of this process, however, has yet to be elucidated. With the aim of examining early temporal progression of structural plasticity, we subjected rats to short training periods on a task in the Morris water maze (MWM), a paradigm previously shown to induce rapid changes in diffusion tensor imaging (DTI) indices. Two groups of rats were each divided into subgroups that consecutively completed 1, 2 or 3 sets of short trials (up to 60s) in the MWM. Each set comprised 4 trials (1 from each quadrant of the WMW), with a specific time interval between sets. To assess the effect of the duration of the task on the evolving changes in DTI indices, we allowed a rest of 45min between sets in one group of rats and a 2-h rest in the other. All rats were scanned with a DTI protocol before and 45min after their last trial. We found that a few minutes of training in a new task sufficed to generate changes in diffusion indices. The earliest changes in DTI (measured after one set of trials) progressed with further training (measured after two sets), but within a few more minutes (after three sets) they reached a plateau. Lengthening the duration of the overall task by prolonging the time interval between sessions did not alter this pattern of change, suggesting that at least within this short time scale such changes are task-dependent, but not time dependent. Our results demonstrate the progression of structural neuroplasticity at different stages of exposure to a novel experience, and show that DTI can be used to trace, in vivo, the localization of structural plasticity induced by training.
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Affiliation(s)
- Shir Hofstetter
- Sagol School of Neuroscience, Tel Aviv University, Tel Aviv 69978, Israel
| | - Yaniv Assaf
- Sagol School of Neuroscience, Tel Aviv University, Tel Aviv 69978, Israel; Department of Neurobiology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel.
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92
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West GL, Konishi K, Bohbot VD. Video Games and Hippocampus-Dependent Learning. CURRENT DIRECTIONS IN PSYCHOLOGICAL SCIENCE 2017. [DOI: 10.1177/0963721416687342] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Research examining the impact of video games on neural systems has largely focused on visual attention and motor control. Recent evidence now shows that video games can also impact the hippocampal memory system. Further, action and 3D-platform video-game genres are thought to have differential impacts on this system. In this review, we examine the specific design elements unique to either action or 3D-platform video games and break down how they could either favor or discourage use of the hippocampal memory system during gameplay. Analysis is based on well-established principles of hippocampus-dependent and non-hippocampus-dependent forms of learning from the human and rodent literature.
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Affiliation(s)
- Greg L. West
- Centre de Recherche en Neuropsychologie et Cognition, University of Montreal
| | - Kyoko Konishi
- Douglas Hospital Research Centre, Montreal, Canada
- Department of Psychiatry, McGill University
| | - Veronique D. Bohbot
- Douglas Hospital Research Centre, Montreal, Canada
- Department of Psychiatry, McGill University
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93
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Holmes HE, Powell NM, Ma D, Ismail O, Harrison IF, Wells JA, Colgan N, O'Callaghan JM, Johnson RA, Murray TK, Ahmed Z, Heggenes M, Fisher A, Cardoso MJ, Modat M, O'Neill MJ, Collins EC, Fisher EMC, Ourselin S, Lythgoe MF. Comparison of In Vivo and Ex Vivo MRI for the Detection of Structural Abnormalities in a Mouse Model of Tauopathy. Front Neuroinform 2017; 11:20. [PMID: 28408879 PMCID: PMC5374887 DOI: 10.3389/fninf.2017.00020] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 02/27/2017] [Indexed: 11/15/2022] Open
Abstract
With increasingly large numbers of mouse models of human disease dedicated to MRI studies, compromises between in vivo and ex vivo MRI must be fully understood in order to inform the choice of imaging methodology. We investigate the application of high resolution in vivo and ex vivo MRI, in combination with tensor-based morphometry (TBM), to uncover morphological differences in the rTg4510 mouse model of tauopathy. The rTg4510 mouse also offers a novel paradigm by which the overexpression of mutant tau can be regulated by the administration of doxycycline, providing us with a platform on which to investigate more subtle alterations in morphology with morphometry. Both in vivo and ex vivo MRI allowed the detection of widespread bilateral patterns of atrophy in the rTg4510 mouse brain relative to wild-type controls. Regions of volume loss aligned with neuronal loss and pathological tau accumulation demonstrated by immunohistochemistry. When we sought to investigate more subtle structural alterations in the rTg4510 mice relative to a subset of doxycycline-treated rTg4510 mice, ex vivo imaging enabled the detection of more regions of morphological brain changes. The disadvantages of ex vivo MRI may however mitigate this increase in sensitivity: we observed a 10% global shrinkage in brain volume of the post-mortem tissues due to formalin fixation, which was most notable in the cerebellum and olfactory bulbs. However, many central brain regions were not adversely affected by the fixation protocol, perhaps due to our “in-skull” preparation. The disparity between our TBM findings from in vivo and ex vivo MRI underlines the importance of appropriate study design, given the trade-off between these two imaging approaches. We support the utility of in vivo MRI for morphological phenotyping of mouse models of disease; however, for subtler phenotypes, ex vivo offers enhanced sensitivity to discrete morphological changes.
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Affiliation(s)
- Holly E Holmes
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK
| | - Nick M Powell
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK.,Centre for Medical Image Computing, University College LondonLondon, UK
| | - Da Ma
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK.,Centre for Medical Image Computing, University College LondonLondon, UK
| | - Ozama Ismail
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK
| | - Ian F Harrison
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK
| | - Jack A Wells
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK
| | - Niall Colgan
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK
| | - James M O'Callaghan
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK
| | - Ross A Johnson
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate CenterIndianapolis, IN, USA
| | | | - Zeshan Ahmed
- Molecular Pathology, Eli Lilly & Co. LtdWindlesham, UK
| | | | - Alice Fisher
- Molecular Pathology, Eli Lilly & Co. LtdWindlesham, UK
| | - M Jorge Cardoso
- Centre for Medical Image Computing, University College LondonLondon, UK
| | - Marc Modat
- Centre for Medical Image Computing, University College LondonLondon, UK
| | | | - Emily C Collins
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate CenterIndianapolis, IN, USA
| | - Elizabeth M C Fisher
- Department of Neurodegenerative Disease, Institute of Neurology, University College LondonLondon, UK
| | | | - Mark F Lythgoe
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK
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94
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Kraus C, Castrén E, Kasper S, Lanzenberger R. Serotonin and neuroplasticity - Links between molecular, functional and structural pathophysiology in depression. Neurosci Biobehav Rev 2017; 77:317-326. [PMID: 28342763 DOI: 10.1016/j.neubiorev.2017.03.007] [Citation(s) in RCA: 254] [Impact Index Per Article: 36.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Revised: 02/23/2017] [Accepted: 03/12/2017] [Indexed: 12/26/2022]
Abstract
Serotonin modulates neuroplasticity, especially during early life, and dysfunctions in both systems likewise contribute to pathophysiology of depression. Recent findings demonstrate that serotonin reuptake inhibitors trigger reactivation of juvenile-like neuroplasticity. How these findings translate to clinical antidepressant treatment in major depressive disorder remains unclear. With this review, we link preclinical with clinical work on serotonin and neuroplasticity to bring two pathophysiologic models in clinical depression closer together. Dysfunctional developmental plasticity impacts on later-life cognitive and emotional functions, changes of synaptic serotonin levels and receptor levels are coupled with altered synaptic plasticity and neurogenesis. Structural magnetic resonance imaging in patients reveals disease-state-specific reductions of gray matter, a marker of neuroplasticity, and reversibility upon selective serotonin reuptake inhibitor treatment. Translational evidence from magnetic resonance imaging in animals support that reduced densities and sizes of neurons and reduced hippocampal volumes in depressive patients could be attributable to changes of serotonergic neuroplasticity. Since ketamine, physical exercise or learning enhance neuroplasticity, combinatory paradigms with selective serotonin reuptake inhibitors could enhance clinical treatment of depression.
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Affiliation(s)
- Christoph Kraus
- NEUROIMAGING LABs (NIL) - PET & MRI & EEG & Chemical Lab Department of Psychiatry and Psychotherapy Medical University of Vienna
| | - Eero Castrén
- Neuroscience Center, University of Helsinki, Helsinki, Finland
| | - Siegfried Kasper
- Department of Psychiatry and Psychotherapy, Medical University of Vienna, Vienna, Austria(1)
| | - Rupert Lanzenberger
- NEUROIMAGING LABs (NIL) - PET & MRI & EEG & Chemical Lab Department of Psychiatry and Psychotherapy Medical University of Vienna.
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95
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Avivi-Arber L, Seltzer Z, Friedel M, Lerch JP, Moayedi M, Davis KD, Sessle BJ. Widespread Volumetric Brain Changes following Tooth Loss in Female Mice. Front Neuroanat 2017; 10:121. [PMID: 28119577 PMCID: PMC5220047 DOI: 10.3389/fnana.2016.00121] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 12/01/2016] [Indexed: 12/19/2022] Open
Abstract
Tooth loss is associated with altered sensory, motor, cognitive and emotional functions. These changes vary highly in the population and are accompanied by structural and functional changes in brain regions mediating these functions. It is unclear to what extent this variability in behavior and function is caused by genetic and/or environmental determinants and which brain regions undergo structural plasticity that mediates these changes. Thus, the overall goal of our research program is to identify genetic variants that control structural and functional plasticity following tooth loss. As a step toward this goal, here our aim was to determine whether structural magnetic resonance imaging (sMRI) is sensitive to detect quantifiable volumetric differences in the brains of mice of different genetic background receiving tooth extraction or sham operation. We used 67 adult female mice of 7 strains, comprising the A/J (A) and C57BL/6J (B) strains and a randomly selected sample of 5 of the 23 AXB-BXA strains (AXB1, AXB4, AXB24, BXA14, BXA24) that were produced from the A and B parental mice by recombinations and inbreeding. This panel of 25 inbred strains of genetically diverse inbred strains of mice is used for mapping chromosomal intervals throughout the genome that harbor candidate genes controlling the phenotypic variance of any trait under study. Under general anesthesia, 39 mice received extraction of 3 right maxillary molar teeth and 28 mice received sham operation. On post-extraction day 21, post-mortem whole-brain high-resolution sMRI was used to quantify the volume of 160 brain regions. Compared to sham operation, tooth extraction was associated with a significantly reduced regional and voxel-wise volumes of cortical brain regions involved in processing somatosensory, motor, cognitive and emotional functions, and increased volumes in subcortical sensorimotor and temporal limbic forebrain regions including the amygdala. Additionally, comparison of the 10 BXA14 and 21 BXA24 mice revealed significant volumetric differences between the two strains in several brain regions. These findings highlight the utility of high-resolution sMRI for studying tooth loss-induced structural brain plasticity in mice, and provide a foundation for further phenotyping structural brain changes following tooth loss in the full AXB-BXA panel to facilitate mapping genes that control brain plasticity following orofacial injury.
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Affiliation(s)
- Limor Avivi-Arber
- University of Toronto Centre for the Study of Pain, University of TorontoToronto, ON, Canada
- Faculty of Dentistry, University of TorontoToronto, ON, Canada
| | - Ze'ev Seltzer
- University of Toronto Centre for the Study of Pain, University of TorontoToronto, ON, Canada
- Faculty of Dentistry, University of TorontoToronto, ON, Canada
- Department of Physiology, Faculty of Medicine, University of TorontoToronto, ON, Canada
- Department of Anesthesiology, University Health NetworkToronto, ON, Canada
- Central Institute of Mental Health, University of HeidelbergMannheim, Germany
| | - Miriam Friedel
- Mouse Imaging Centre, Hospital for Sick ChildrenToronto, ON, Canada
| | - Jason P. Lerch
- Mouse Imaging Centre, Hospital for Sick ChildrenToronto, ON, Canada
- Medical Biophysics, Faculty of Medicine, University of TorontoToronto, ON, Canada
| | - Massieh Moayedi
- University of Toronto Centre for the Study of Pain, University of TorontoToronto, ON, Canada
- Faculty of Dentistry, University of TorontoToronto, ON, Canada
| | - Karen D. Davis
- University of Toronto Centre for the Study of Pain, University of TorontoToronto, ON, Canada
- Department of Surgery, University of TorontoToronto, ON, Canada
- Institute of Medical Science, University of TorontoToronto, ON, Canada
- Division of Brain, Imaging and Behaviour - Systems Neuroscience, Krembil Research Institute, Toronto Western Hospital, University Health NetworkToronto, ON, Canada
| | - Barry J. Sessle
- University of Toronto Centre for the Study of Pain, University of TorontoToronto, ON, Canada
- Faculty of Dentistry, University of TorontoToronto, ON, Canada
- Department of Physiology, Faculty of Medicine, University of TorontoToronto, ON, Canada
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96
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Magalhães R, Bourgin J, Boumezbeur F, Marques P, Bottlaender M, Poupon C, Djemaï B, Duchesnay E, Mériaux S, Sousa N, Jay TM, Cachia A. White matter changes in microstructure associated with a maladaptive response to stress in rats. Transl Psychiatry 2017; 7:e1009. [PMID: 28117841 PMCID: PMC5545740 DOI: 10.1038/tp.2016.283] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 11/30/2016] [Indexed: 12/29/2022] Open
Abstract
In today's society, every individual is subjected to stressful stimuli with different intensities and duration. This exposure can be a key trigger in several mental illnesses greatly affecting one's quality of life. Yet not all subjects respond equally to the same stimulus and some are able to better adapt to them delaying the onset of its negative consequences. The neural specificities of this adaptation can be essential to understand the true dynamics of stress as well as to design new approaches to reduce its consequences. In the current work, we employed ex vivo high field diffusion magnetic resonance imaging (MRI) to uncover the differences in white matter properties in the entire brain between Fisher 344 (F344) and Sprague-Dawley (SD) rats, known to present different responses to stress, and to examine the effects of a 2-week repeated inescapable stress paradigm. We applied a tract-based spatial statistics (TBSS) analysis approach to a total of 25 animals. After exposure to stress, SD rats were found to have lower values of corticosterone when compared with F344 rats. Overall, stress was found to lead to an overall increase in fractional anisotropy (FA), on top of a reduction in mean and radial diffusivity (MD and RD) in several white matter bundles of the brain. No effect of strain on the white matter diffusion properties was observed. The strain-by-stress interaction revealed an effect on SD rats in MD, RD and axial diffusivity (AD), with lower diffusion metric levels on stressed animals. These effects were localized on the left side of the brain on the external capsule, corpus callosum, deep cerebral white matter, anterior commissure, endopiriform nucleus, dorsal hippocampus and amygdala fibers. The results possibly reveal an adaptation of the SD strain to the stressful stimuli through synaptic and structural plasticity processes, possibly reflecting learning processes.
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Affiliation(s)
- R Magalhães
- Physiopathologie des Maladies Psychiatriques, UMR_S 894 Inserm, Centre de Psychiatrie et Neurosciences, Paris, France,Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga, Portugal,ICVS/3B’s—PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - J Bourgin
- Physiopathologie des Maladies Psychiatriques, UMR_S 894 Inserm, Centre de Psychiatrie et Neurosciences, Paris, France,Université Paris Descartes, Sorbonne Paris Cité, Paris, France,Faculté de Médecine Paris Descartes, Service Hospitalo Universitaire, Centre Hospitalier Sainte-Anne, Paris, France
| | | | - P Marques
- Physiopathologie des Maladies Psychiatriques, UMR_S 894 Inserm, Centre de Psychiatrie et Neurosciences, Paris, France,Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga, Portugal,ICVS/3B’s—PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | | | - C Poupon
- Neurospin, I2BM, CEA, Gif/Yvette, France
| | - B Djemaï
- Neurospin, I2BM, CEA, Gif/Yvette, France
| | | | - S Mériaux
- Neurospin, I2BM, CEA, Gif/Yvette, France
| | - N Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga, Portugal,ICVS/3B’s—PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - T M Jay
- Physiopathologie des Maladies Psychiatriques, UMR_S 894 Inserm, Centre de Psychiatrie et Neurosciences, Paris, France,Université Paris Descartes, Sorbonne Paris Cité, Paris, France,Faculté de Médecine Paris Descartes, Service Hospitalo Universitaire, Centre Hospitalier Sainte-Anne, Paris, France
| | - A Cachia
- Physiopathologie des Maladies Psychiatriques, UMR_S 894 Inserm, Centre de Psychiatrie et Neurosciences, Paris, France,Université Paris Descartes, Sorbonne Paris Cité, Paris, France,Laboratoire de Psychologie du développement et de l’Education de l’Enfant, CNRS UMR 8240, Paris, France,Institut Universitaire de France, Paris, France,Centre de Psychiatrie et Neurosciences, INSERM UMR_S 894, 2 ter rue d’Alésia, Paris 75014, France. E-mail:
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97
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Histological Underpinnings of Grey Matter Changes in Fibromyalgia Investigated Using Multimodal Brain Imaging. J Neurosci 2016; 37:1090-1101. [PMID: 27986927 DOI: 10.1523/jneurosci.2619-16.2016] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 11/24/2016] [Accepted: 12/05/2016] [Indexed: 12/14/2022] Open
Abstract
Chronic pain patients present with cortical gray matter alterations, observed with anatomical magnetic resonance (MR) imaging. Reduced regional gray matter volumes are often interpreted to reflect neurodegeneration, but studies investigating the cellular origin of gray matter changes are lacking. We used multimodal imaging to compare 26 postmenopausal women with fibromyalgia with 25 healthy controls (age range: 50-75 years) to test whether regional gray matter volume decreases in chronic pain are associated with compromised neuronal integrity. Regional gray matter decreases were largely explained by T1 relaxation times in gray matter, a surrogate measure of water content, and not to any substantial degree by GABAA receptor concentration, an indirect marker of neuronal integrity measured with [18F] flumazenil PET. In addition, the MR spectroscopy marker of neuronal viability, N-acetylaspartate, did not differ between patients and controls. These findings suggest that decreased gray matter volumes are not explained by compromised neuronal integrity. Alternatively, a decrease in neuronal matter could be compensated for by an upregulation of GABAA receptors. The relation between regional gray matter and T1 relaxation times suggests decreased tissue water content underlying regional gray matter decreases. In contrast, regional gray matter increases were explained by GABAA receptor concentration in addition to T1 relaxation times, indicating perhaps increased neuronal matter or GABAA receptor upregulation and inflammatory edema. By providing information on the histological origins of cerebral gray matter alterations in fibromyalgia, this study advances the understanding of the neurobiology of chronic widespread pain. SIGNIFICANCE STATEMENT Regional gray matter alterations in chronic pain, as detected with voxel-based morphometry of anatomical magnetic resonance images, are commonly interpreted to reflect neurodegeneration, but this assumption has not been tested. We found decreased gray matter in fibromyalgia to be associated with T1 relaxation times, a surrogate marker of water content, but not with GABAA receptor concentration, a surrogate of neuronal integrity. In contrast, regional gray matter increases were partly explained by GABAA receptor concentration, indicating some form of neuronal plasticity. The study emphasizes that voxel-based morphometry is an exploratory measure, demonstrating the need to investigate the histological origin of gray matter alterations for every distinct clinical entity, and advances the understanding of the neurobiology of chronic (widespread) pain.
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Kawamichi H, Sugawara SK, Hamano YH, Makita K, Matsunaga M, Tanabe HC, Ogino Y, Saito S, Sadato N. Being in a Romantic Relationship Is Associated with Reduced Gray Matter Density in Striatum and Increased Subjective Happiness. Front Psychol 2016; 7:1763. [PMID: 27895606 PMCID: PMC5107565 DOI: 10.3389/fpsyg.2016.01763] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 10/26/2016] [Indexed: 11/13/2022] Open
Abstract
Romantic relationship, a widespread feature of human society, is one of the most influential factors in daily life. Although stimuli related to romantic love or being in a romantic relationship commonly result in enhancement of activation or functional connectivity of the reward system, including the striatum, the structure underlying romantic relationship-related regions remain unclear. Because individual experiences can alter gray matter within the adult human brain, we hypothesized that romantic relationship is associated with structural differences in the striatum related to the positive subjective experience of being in a romantic relationship. Because intimate romantic relationships contribute to perceived subjective happiness, this subjective enhancement of happiness might be accompanied by the experience of positive events related to being in a romantic relationship. To test this hypothesis and elucidate the structure involved, we compared subjective happiness, an indirect measure of the existence of positive experiences caused by being in a romantic relationship, of participants with or without romantic partners (N = 68). Furthermore, we also conducted a voxel-based morphometry study of the effects of being in a romantic relationship (N = 113). Being in a romantic relationship was associated with greater subjective happiness and reduced gray matter density within the right dorsal striatum. These results suggest that being in a romantic relationship enhances perceived subjective happiness via positive experiences. Furthermore, the observed reduction in gray matter density in the right dorsal striatum may reflect an increase in saliency of social reward within a romantic relationship. Thus, being in a romantic relationship is associated with positive experiences and a reduction of gray matter density in the right dorsal striatum, representing a modulation of social reward.
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Affiliation(s)
- Hiroaki Kawamichi
- Division of Cerebral Integration, Department of Cerebral Research, National Institute for Physiological SciencesOkazaki, Japan; School of Medicine, Faculty of Medicine, Gunma UniversityMaebashi, Japan; Graduate School of Human Health Sciences, Tokyo Metropolitan UniversityTokyo, Japan
| | - Sho K Sugawara
- Division of Cerebral Integration, Department of Cerebral Research, National Institute for Physiological Sciences Okazaki, Japan
| | - Yuki H Hamano
- Division of Cerebral Integration, Department of Cerebral Research, National Institute for Physiological SciencesOkazaki, Japan; Department of Physiological Sciences, SOKENDAI (The Graduate University for Advanced Studies)Hayama, Japan
| | - Kai Makita
- Division of Cerebral Integration, Department of Cerebral Research, National Institute for Physiological Sciences Okazaki, Japan
| | - Masahiro Matsunaga
- Department of Health and Psychosocial Medicine, School of Medicine, Aichi Medical University Nagakute, Japan
| | - Hiroki C Tanabe
- Department of Social and Human Environment, Graduate School of Environmental Studies, Nagoya University Nagoya, Japan
| | - Yuichi Ogino
- Department of Anesthesiology, Graduate School of Medicine, Gunma University Maebashi, Japan
| | - Shigeru Saito
- Department of Anesthesiology, Graduate School of Medicine, Gunma University Maebashi, Japan
| | - Norihiro Sadato
- Division of Cerebral Integration, Department of Cerebral Research, National Institute for Physiological SciencesOkazaki, Japan; Department of Physiological Sciences, SOKENDAI (The Graduate University for Advanced Studies)Hayama, Japan
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de Guzman AE, Wong MD, Gleave JA, Nieman BJ. Variations in post-perfusion immersion fixation and storage alter MRI measurements of mouse brain morphometry. Neuroimage 2016; 142:687-695. [DOI: 10.1016/j.neuroimage.2016.06.028] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 05/20/2016] [Accepted: 06/16/2016] [Indexed: 11/15/2022] Open
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Variability of brain anatomy for three common mouse strains. Neuroimage 2016; 142:656-662. [DOI: 10.1016/j.neuroimage.2016.03.069] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 03/24/2016] [Accepted: 03/26/2016] [Indexed: 11/23/2022] Open
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