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Caffarra S, Joo SJ, Bloom D, Kruper J, Rokem A, Yeatman JD. Development of the visual white matter pathways mediates development of electrophysiological responses in visual cortex. Hum Brain Mapp 2021; 42:5785-5797. [PMID: 34487405 PMCID: PMC8559498 DOI: 10.1002/hbm.25654] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 08/23/2021] [Accepted: 08/27/2021] [Indexed: 12/24/2022] Open
Abstract
The latency of neural responses in the visual cortex changes systematically across the lifespan. Here, we test the hypothesis that development of visual white matter pathways mediates maturational changes in the latency of visual signals. Thirty-eight children participated in a cross-sectional study including diffusion magnetic resonance imaging (MRI) and magnetoencephalography (MEG) sessions. During the MEG acquisition, participants performed a lexical decision and a fixation task on words presented at varying levels of contrast and noise. For all stimuli and tasks, early evoked fields were observed around 100 ms after stimulus onset (M100), with slower and lower amplitude responses for low as compared to high contrast stimuli. The optic radiations and optic tracts were identified in each individual's brain based on diffusion MRI tractography. The diffusion properties of the optic radiations predicted M100 responses, especially for high contrast stimuli. Higher optic radiation fractional anisotropy (FA) values were associated with faster and larger M100 responses. Over this developmental window, the M100 responses to high contrast stimuli became faster with age and the optic radiation FA mediated this effect. These findings suggest that the maturation of the optic radiations over childhood accounts for individual variations observed in the developmental trajectory of visual cortex responses.
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Affiliation(s)
- Sendy Caffarra
- Division of Developmental‐Behavioral PediatricsStanford University School of MedicineStanfordCalifornia
- Stanford University Graduate School of EducationStanfordCalifornia
- Basque Center on Cognition Brain and LanguageSan SebastianSpain
- Department of Biomedical, Metabolic and Neural SciencesUniversity of Modena and Reggio EmiliaModenaItaly
| | - Sung Jun Joo
- Department of PsychologyPusan National UniversityPusanRepublic of Korea
| | - David Bloom
- Department of PsychologyUniversity of WashingtonSeattleWashington
- eScience InstituteUniversity of WashingtonSeattleWashington
| | - John Kruper
- Department of PsychologyUniversity of WashingtonSeattleWashington
- eScience InstituteUniversity of WashingtonSeattleWashington
| | - Ariel Rokem
- Department of PsychologyUniversity of WashingtonSeattleWashington
- eScience InstituteUniversity of WashingtonSeattleWashington
| | - Jason D. Yeatman
- Division of Developmental‐Behavioral PediatricsStanford University School of MedicineStanfordCalifornia
- Stanford University Graduate School of EducationStanfordCalifornia
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2
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Klimmasch L, Schneider J, Lelais A, Fronius M, Shi BE, Triesch J. The development of active binocular vision under normal and alternate rearing conditions. eLife 2021; 10:e56212. [PMID: 34402429 PMCID: PMC8445622 DOI: 10.7554/elife.56212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 08/04/2021] [Indexed: 12/18/2022] Open
Abstract
The development of binocular vision is an active learning process comprising the development of disparity tuned neurons in visual cortex and the establishment of precise vergence control of the eyes. We present a computational model for the learning and self-calibration of active binocular vision based on the Active Efficient Coding framework, an extension of classic efficient coding ideas to active perception. Under normal rearing conditions with naturalistic input, the model develops disparity tuned neurons and precise vergence control, allowing it to correctly interpret random dot stereograms. Under altered rearing conditions modeled after neurophysiological experiments, the model qualitatively reproduces key experimental findings on changes in binocularity and disparity tuning. Furthermore, the model makes testable predictions regarding how altered rearing conditions impede the learning of precise vergence control. Finally, the model predicts a surprising new effect that impaired vergence control affects the statistics of orientation tuning in visual cortical neurons.
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Affiliation(s)
- Lukas Klimmasch
- Frankfurt Institute for Advanced Studies (FIAS)Frankfurt am MainGermany
| | - Johann Schneider
- Frankfurt Institute for Advanced Studies (FIAS)Frankfurt am MainGermany
| | - Alexander Lelais
- Frankfurt Institute for Advanced Studies (FIAS)Frankfurt am MainGermany
| | - Maria Fronius
- Department of Ophthalmology, Child Vision Research Unit, Goethe UniversityFrankfurt am MainGermany
| | - Bertram Emil Shi
- Department of Electronic and Computer Engineering, Hong Kong University of Science and TechnologyHong KongChina
| | - Jochen Triesch
- Frankfurt Institute for Advanced Studies (FIAS)Frankfurt am MainGermany
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3
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Leighton AH, Cheyne JE, Houwen GJ, Maldonado PP, De Winter F, Levelt CN, Lohmann C. Somatostatin interneurons restrict cell recruitment to retinally driven spontaneous activity in the developing cortex. Cell Rep 2021; 36:109316. [PMID: 34233176 DOI: 10.1016/j.celrep.2021.109316] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 04/11/2021] [Accepted: 06/06/2021] [Indexed: 12/16/2022] Open
Abstract
During early development, before the eyes open, synaptic refinement of sensory networks depends on activity generated by developing neurons themselves. In the mouse visual system, retinal cells spontaneously depolarize and recruit downstream neurons to bursts of activity, where the number of recruited cells determines the resolution of synaptic retinotopic refinement. Here we show that during the second post-natal week in mouse visual cortex, somatostatin (SST)-expressing interneurons control the recruitment of cells to retinally driven spontaneous activity. Suppressing SST interneurons increases cell participation and allows events to spread farther along the cortex. During the same developmental period, a second type of high-participation, retina-independent event occurs. During these events, cells receive such large excitatory charge that inhibition is overwhelmed and large parts of the cortex participate in each burst. These results reveal a role of SST interneurons in restricting retinally driven activity in the visual cortex, which may contribute to the refinement of retinotopy.
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Affiliation(s)
- Alexandra H Leighton
- Department of Synapse and Network Development, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, the Netherlands
| | - Juliette E Cheyne
- Department of Synapse and Network Development, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, the Netherlands
| | - Gerrit J Houwen
- Department of Synapse and Network Development, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, the Netherlands
| | - Paloma P Maldonado
- Department of Synapse and Network Development, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, the Netherlands
| | - Fred De Winter
- Department of Neuroregeneration, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, the Netherlands
| | - Christiaan N Levelt
- Department of Molecular Visual Plasticity, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, the Netherlands; Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, VU University Amsterdam, Amsterdam, the Netherlands
| | - Christian Lohmann
- Department of Synapse and Network Development, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, the Netherlands; Department of Functional Genomics, Center for Neurogenomics and Cognitive Research, VU University Amsterdam, Amsterdam, the Netherlands.
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4
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Crodelle J, McLaughlin DW. Modeling the role of gap junctions between excitatory neurons in the developing visual cortex. PLoS Comput Biol 2021; 17:e1007915. [PMID: 34228707 PMCID: PMC8284639 DOI: 10.1371/journal.pcbi.1007915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 07/16/2021] [Accepted: 06/16/2021] [Indexed: 11/23/2022] Open
Abstract
Recent experiments in the developing mammalian visual cortex have revealed that gap junctions couple excitatory cells and potentially influence the formation of chemical synapses. In particular, cells that were coupled by a gap junction during development tend to share an orientation preference and are preferentially coupled by a chemical synapse in the adult cortex, a property that is diminished when gap junctions are blocked. In this work, we construct a simplified model of the developing mouse visual cortex including spike-timing-dependent plasticity of both the feedforward synaptic inputs and recurrent cortical synapses. We use this model to show that synchrony among gap-junction-coupled cells underlies their preference to form strong recurrent synapses and develop similar orientation preference; this effect decreases with an increase in coupling density. Additionally, we demonstrate that gap-junction coupling works, together with the relative timing of synaptic development of the feedforward and recurrent synapses, to determine the resulting cortical map of orientation preference. Gap junctions, or sites of direct electrical connections between neurons, have a significant presence in the cortex, both during development and in adulthood. Their primary function during either of these periods, however, is still poorly understood. In the adult cortex, gap junctions between local, inhibitory neurons have been shown to promote synchronous firing, a network characteristic thought to be important for learning, attention, and memory. During development, gap junctions between excitatory, pyramidal cells, have been conjectured to play a role in synaptic plasticity and the formation of cortical circuits. In the visual cortex, where neurons exhibit tuned responses to properties of visual input such as orientation and direction, recent experiments show that excitatory cells are coupled by gap junctions during the first postnatal week and are replaced by chemical synapses during the second week. In this work, we explore the possible contribution of gap-junction coupling during development to the formation of chemical synapses between the visual cortex from the thalamus and between cortical cells within the visual cortex. Specifically, using a mathematical model of the visual cortex during development, we identify the response properties of gap-junction-coupled cells and their influence on the formation of the cortical map of orientation preference.
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Affiliation(s)
- Jennifer Crodelle
- Middlebury College, Middlebury, Vermont, United States of America
- Courant Institute of Mathematical Sciences, NYU, New York, New York, United States of America
- * E-mail:
| | - David W. McLaughlin
- Courant Institute of Mathematical Sciences, NYU, New York, New York, United States of America
- Center for Neural Science, NYU, New York, New York, United States of America
- Neuroscience Institute of NYU Langone Health, New York, New York, United States of America
- New York University Shanghai, Shanghai, China
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5
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Kita Y, Nishibe H, Wang Y, Hashikawa T, Kikuchi SS, U M, Yoshida AC, Yoshida C, Kawase T, Ishii S, Skibbe H, Shimogori T. Cellular-resolution gene expression profiling in the neonatal marmoset brain reveals dynamic species- and region-specific differences. Proc Natl Acad Sci U S A 2021; 118:e2020125118. [PMID: 33903237 PMCID: PMC8106353 DOI: 10.1073/pnas.2020125118] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Precise spatiotemporal control of gene expression in the developing brain is critical for neural circuit formation, and comprehensive expression mapping in the developing primate brain is crucial to understand brain function in health and disease. Here, we developed an unbiased, automated, large-scale, cellular-resolution in situ hybridization (ISH)-based gene expression profiling system (GePS) and companion analysis to reveal gene expression patterns in the neonatal New World marmoset cortex, thalamus, and striatum that are distinct from those in mice. Gene-ontology analysis of marmoset-specific genes revealed associations with catalytic activity in the visual cortex and neuropsychiatric disorders in the thalamus. Cortically expressed genes with clear area boundaries were used in a three-dimensional cortical surface mapping algorithm to delineate higher-order cortical areas not evident in two-dimensional ISH data. GePS provides a powerful platform to elucidate the molecular mechanisms underlying primate neurobiology and developmental psychiatric and neurological disorders.
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Affiliation(s)
- Yoshiaki Kita
- Laboratory for Molecular Mechanisms of Brain Development, Center for Brain Science, RIKEN, Saitama 351-0198, Japan
| | - Hirozumi Nishibe
- Laboratory for Molecular Mechanisms of Brain Development, Center for Brain Science, RIKEN, Saitama 351-0198, Japan
| | - Yan Wang
- Laboratory for Molecular Mechanisms of Brain Development, Center for Brain Science, RIKEN, Saitama 351-0198, Japan
| | - Tsutomu Hashikawa
- Laboratory for Molecular Mechanisms of Brain Development, Center for Brain Science, RIKEN, Saitama 351-0198, Japan
| | - Satomi S Kikuchi
- Laboratory for Molecular Mechanisms of Brain Development, Center for Brain Science, RIKEN, Saitama 351-0198, Japan
| | - Mami U
- Laboratory for Molecular Mechanisms of Brain Development, Center for Brain Science, RIKEN, Saitama 351-0198, Japan
| | - Aya C Yoshida
- Laboratory for Molecular Mechanisms of Brain Development, Center for Brain Science, RIKEN, Saitama 351-0198, Japan
| | - Chihiro Yoshida
- Laboratory for Molecular Mechanisms of Brain Development, Center for Brain Science, RIKEN, Saitama 351-0198, Japan
| | - Takashi Kawase
- Integrated Systems Biology Laboratory, Department of Systems Science, Graduate School of Informatics, Kyoto University, Kyoto 606-8501, Japan
| | - Shin Ishii
- Integrated Systems Biology Laboratory, Department of Systems Science, Graduate School of Informatics, Kyoto University, Kyoto 606-8501, Japan
| | - Henrik Skibbe
- Brain Image Analysis Unit, Center for Brain Science, RIKEN, Saitama 351-0198, Japan
| | - Tomomi Shimogori
- Laboratory for Molecular Mechanisms of Brain Development, Center for Brain Science, RIKEN, Saitama 351-0198, Japan;
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6
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Salinas KJ, Huh CYL, Zeitoun JH, Gandhi SP. Functional Differentiation of Mouse Visual Cortical Areas Depends upon Early Binocular Experience. J Neurosci 2021; 41:1470-1488. [PMID: 33376158 PMCID: PMC7896022 DOI: 10.1523/jneurosci.0548-20.2020] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 12/15/2020] [Accepted: 12/17/2020] [Indexed: 11/21/2022] Open
Abstract
The mammalian visual cortex contains multiple retinotopically defined areas that process distinct features of the visual scene. Little is known about what guides the functional differentiation of visual cortical areas during development. Recent studies in mice have revealed that visual input from the two eyes provides spatiotemporally distinct signals to primary visual cortex (V1), such that contralateral eye-dominated V1 neurons respond to higher spatial frequencies than ipsilateral eye-dominated neurons. To test whether binocular visual input drives the differentiation of visual cortical areas, we used two-photon calcium imaging to characterize the effects of juvenile monocular deprivation (MD) on the responses of neurons in V1 and two higher visual areas, LM (lateromedial) and PM (posteromedial). In adult mice of either sex, we find that MD prevents the emergence of distinct spatiotemporal tuning in V1, LM, and PM. We also find that, within each of these areas, MD reorganizes the distinct spatiotemporal tuning properties driven by the two eyes. Moreover, we find a relationship between speed tuning and ocular dominance in all three areas that MD preferentially disrupts in V1, but not in LM or PM. Together, these results reveal that balanced binocular vision during development is essential for driving the functional differentiation of visual cortical areas. The higher visual areas of mouse visual cortex may provide a useful platform for investigating the experience-dependent mechanisms that set up the specialized processing within neocortical areas during postnatal development.SIGNIFICANCE STATEMENT Little is known about the factors guiding the emergence of functionally distinct areas in the brain. Using in vivo Ca2+ imaging, we recorded visually evoked activity from cells in V1 and higher visual areas LM (lateromedial) and PM (posteromedial) of mice. Neurons in these areas normally display distinct spatiotemporal tuning properties. We found that depriving one eye of normal input during development prevents the functional differentiation of visual areas. Deprivation did not disrupt the degree of speed tuning, a property thought to emerge in higher visual areas. Thus, some properties of visual cortical neurons are shaped by binocular experience, while others are resistant. Our study uncovers the fundamental role of binocular experience in the formation of distinct areas in visual cortex.
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Affiliation(s)
- Kirstie J Salinas
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, California 92697
| | - Carey Y L Huh
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, California 92697
| | - Jack H Zeitoun
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, California 92697
| | - Sunil P Gandhi
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, California 92697
- Center for the Neurobiology of Learning and Memory, University of California, Irvine, Irvine, California 92697
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7
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Wang BS, Bernardez Sarria MS, An X, He M, Alam NM, Prusky GT, Crair MC, Huang ZJ. Retinal and Callosal Activity-Dependent Chandelier Cell Elimination Shapes Binocularity in Primary Visual Cortex. Neuron 2021; 109:502-515.e7. [PMID: 33290732 PMCID: PMC7943176 DOI: 10.1016/j.neuron.2020.11.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 09/23/2020] [Accepted: 11/04/2020] [Indexed: 12/21/2022]
Abstract
In mammals with binocular vision, integration of the left and right visual scene relies on information in the center visual field, which are relayed from each retina in parallel and merge in the primary visual cortex (V1) through the convergence of ipsi- and contralateral geniculocortical inputs as well as transcallosal projections between two visual cortices. The developmental assembly of this binocular circuit, especially the transcallosal pathway, remains incompletely understood. Using genetic methods in mice, we found that several days before eye-opening, retinal and callosal activities drive massive apoptosis of GABAergic chandelier cells (ChCs) in the binocular region of V1. Blockade of ChC elimination resulted in a contralateral eye-dominated V1 and deficient binocular vision. As pre-vision retinal activities convey the left-right organization of the visual field, their regulation of ChC density through the transcallosal pathway may prime a nascent binocular territory for subsequent experience-driven tuning during the post-vision critical period.
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Affiliation(s)
- Bor-Shuen Wang
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA
| | - Maria Sol Bernardez Sarria
- Department of Neuroscience, Yale University School of Medicine, New Haven, CT, USA; Interdepartmental Neuroscience Program, Yale University, New Haven, CT, USA
| | - Xu An
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA
| | - Miao He
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA; Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China
| | - Nazia M Alam
- The Burke Neurological Institute, White Plains, NY 10605, USA; Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA
| | - Glen T Prusky
- The Burke Neurological Institute, White Plains, NY 10605, USA; Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA
| | - Michael C Crair
- Department of Neuroscience, Yale University School of Medicine, New Haven, CT, USA
| | - Z Josh Huang
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA; Department of Neurobiology, Duke University Medical Center, Durham, NC, USA.
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8
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Maldonado PP, Nuno-Perez A, Kirchner JH, Hammock E, Gjorgjieva J, Lohmann C. Oxytocin Shapes Spontaneous Activity Patterns in the Developing Visual Cortex by Activating Somatostatin Interneurons. Curr Biol 2021; 31:322-333.e5. [PMID: 33157028 PMCID: PMC7846278 DOI: 10.1016/j.cub.2020.10.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 08/28/2020] [Accepted: 10/09/2020] [Indexed: 01/15/2023]
Abstract
Spontaneous network activity shapes emerging neuronal circuits during early brain development prior to sensory perception. However, how neuromodulation influences this activity is not fully understood. Here, we report that the neuromodulator oxytocin differentially shapes spontaneous activity patterns across sensory cortices. In vivo, oxytocin strongly decreased the frequency and pairwise correlations of spontaneous activity events in the primary visual cortex (V1), but it did not affect the frequency of spontaneous network events in the somatosensory cortex (S1). Patch-clamp recordings in slices and RNAscope showed that oxytocin affects S1 excitatory and inhibitory neurons similarly, whereas in V1, oxytocin targets only inhibitory neurons. Somatostatin-positive (SST+) interneurons expressed the oxytocin receptor and were activated by oxytocin in V1. Accordingly, pharmacogenetic silencing of V1 SST+ interneurons fully blocked oxytocin's effect on inhibition in vitro as well its effect on spontaneous activity patterns in vivo. Thus, oxytocin decreases the excitatory/inhibitory (E/I) ratio by recruiting SST+ interneurons and modulates specific features of V1 spontaneous activity patterns that are crucial for the wiring and refining of developing sensory circuits.
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Affiliation(s)
- Paloma P Maldonado
- Department of Synapse and Network Development, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, the Netherlands.
| | - Alvaro Nuno-Perez
- Department of Synapse and Network Development, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, the Netherlands.
| | - Jan H Kirchner
- Max Planck Institute for Brain Research, Computation in Neural Circuits, 60438 Frankfurt am Main, Germany; TUM School of Life Sciences, Technical University of Munich, 85354 Freising, Germany.
| | - Elizabeth Hammock
- Program in Neuroscience, The Florida State University, Tallahassee, FL 32306, USA; Department of Psychology, The Florida State University, Tallahassee, FL 32306, USA.
| | - Julijana Gjorgjieva
- Max Planck Institute for Brain Research, Computation in Neural Circuits, 60438 Frankfurt am Main, Germany; TUM School of Life Sciences, Technical University of Munich, 85354 Freising, Germany.
| | - Christian Lohmann
- Department of Synapse and Network Development, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, the Netherlands; Department of Functional Genomics, Center for Neurogenomics and Cognitive Research, VU University Amsterdam, 1081 HV Amsterdam, the Netherlands.
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Negwer M, Piera K, Hesen R, Lütje L, Aarts L, Schubert D, Nadif Kasri N. EHMT1 regulates Parvalbumin-positive interneuron development and GABAergic input in sensory cortical areas. Brain Struct Funct 2020; 225:2701-2716. [PMID: 32975655 PMCID: PMC7674571 DOI: 10.1007/s00429-020-02149-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 09/10/2020] [Indexed: 02/08/2023]
Abstract
Mutations in the Euchromatic Histone Methyltransferase 1 (EHMT1) gene cause Kleefstra syndrome, a rare form of intellectual disability (ID) with strong autistic traits and sensory processing deficits. Proper development of inhibitory interneurons is crucial for sensory function. Here we report a timeline of Parvalbumin-positive (PV+) interneuron development in the three most important sensory cortical areas in the Ehmt1+/- mouse. We find a hitherto unreported delay of PV+ neuron maturation early in sensory development, with layer- and region-specific variability later in development. The delayed PV+ maturation is also reflected in a delayed maturation of GABAergic transmission in Ehmt1+/- auditory cortex, where we find a reduced GABA release probability specifically in putative PV+ synapses. Together with earlier reports of excitatory impairments in Ehmt1+/- neurons, we propose a shift in excitatory-inhibitory balance towards overexcitability in Ehmt1+/- sensory cortices as a consequence of early deficits in inhibitory maturation.
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Affiliation(s)
- Moritz Negwer
- Department of Human Genetics, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB, Nijmegen, The Netherlands
| | - Karol Piera
- Department of Human Genetics, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB, Nijmegen, The Netherlands
| | - Rick Hesen
- Department of Human Genetics, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB, Nijmegen, The Netherlands
| | - Lukas Lütje
- Department of Human Genetics, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB, Nijmegen, The Netherlands
| | - Lynn Aarts
- Department of Human Genetics, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB, Nijmegen, The Netherlands
| | - Dirk Schubert
- Department of Cognitive Neuroscience, Radboudumc, Donders Institute for Brain, Cognition and Behaviour, 6500 HB, Nijmegen, The Netherlands
| | - Nael Nadif Kasri
- Department of Human Genetics, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB, Nijmegen, The Netherlands.
- Department of Cognitive Neuroscience, Radboudumc, Donders Institute for Brain, Cognition and Behaviour, 6500 HB, Nijmegen, The Netherlands.
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10
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Gray DT, De La Peña NM, Umapathy L, Burke SN, Engle JR, Trouard TP, Barnes CA. Auditory and Visual System White Matter Is Differentially Impacted by Normative Aging in Macaques. J Neurosci 2020; 40:8913-8923. [PMID: 33051354 PMCID: PMC7659446 DOI: 10.1523/jneurosci.1163-20.2020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 08/06/2020] [Accepted: 10/04/2020] [Indexed: 11/21/2022] Open
Abstract
Deficits in auditory and visual processing are commonly encountered by older individuals. In addition to the relatively well described age-associated pathologies that reduce sensory processing at the level of the cochlea and eye, multiple changes occur along the ascending auditory and visual pathways that further reduce sensory function in each domain. One fundamental question that remains to be directly addressed is whether the structure and function of the central auditory and visual systems follow similar trajectories across the lifespan or sustain the impacts of brain aging independently. The present study used diffusion magnetic resonance imaging and electrophysiological assessments of auditory and visual system function in adult and aged macaques to better understand how age-related changes in white matter connectivity at multiple levels of each sensory system might impact auditory and visual function. In particular, the fractional anisotropy (FA) of auditory and visual system thalamocortical and interhemispheric corticocortical connections was estimated using probabilistic tractography analyses. Sensory processing and sensory system FA were both reduced in older animals compared with younger adults. Corticocortical FA was significantly reduced only in white matter of the auditory system of aged monkeys, while thalamocortical FA was lower only in visual system white matter of the same animals. Importantly, these structural alterations were significantly associated with sensory function within each domain. Together, these results indicate that age-associated deficits in auditory and visual processing emerge in part from microstructural alterations to specific sensory white matter tracts, and not from general differences in white matter condition across the aging brain.SIGNIFICANCE STATEMENT Age-associated deficits in sensory processing arise from structural and functional alterations to both peripheral sensory organs and central brain regions. It remains unclear whether different sensory systems undergo similar or distinct trajectories in function across the lifespan. To provide novel insights into this question, this study combines electrophysiological assessments of auditory and visual function with diffusion MRI in aged macaques. The results suggest that age-related sensory processing deficits in part result from factors that impact the condition of specific white matter tracts, and not from general decreases in connectivity between sensory brain regions. Such anatomic specificity argues for a framework aimed at understanding vulnerabilities with relatively local influence and brain region specificity.
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Affiliation(s)
- Daniel T Gray
- Division of Neural System, Memory and Aging, University of Arizona, Tucson, Arizona 85724
- Evelyn F. McKnight Brain Institute, University of Arizona, Tucson, Arizona 85724
| | - Nicole M De La Peña
- Division of Neural System, Memory and Aging, University of Arizona, Tucson, Arizona 85724
- Evelyn F. McKnight Brain Institute, University of Arizona, Tucson, Arizona 85724
| | - Lavanya Umapathy
- Electrical and Computer Engineering, University of Arizona, Tucson, Arizona 85724
| | - Sara N Burke
- Evelyn F. McKnight Brain Institute, University of Florida, Gainesville, Florida 32609
| | - James R Engle
- Division of Neural System, Memory and Aging, University of Arizona, Tucson, Arizona 85724
- Evelyn F. McKnight Brain Institute, University of Arizona, Tucson, Arizona 85724
| | - Theodore P Trouard
- Evelyn F. McKnight Brain Institute, University of Arizona, Tucson, Arizona 85724
- Department of Biomedical Engineering, University of Arizona, Tucson, Arizona 85724
| | - Carol A Barnes
- Division of Neural System, Memory and Aging, University of Arizona, Tucson, Arizona 85724
- Evelyn F. McKnight Brain Institute, University of Arizona, Tucson, Arizona 85724
- Departments of Psychology, Neurology and Neuroscience, University of Arizona, Tucson, Arizona 85724
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Tomorsky J, Parker PRL, Doe CQ, Niell CM. Precise levels of nectin-3 are required for proper synapse formation in postnatal visual cortex. Neural Dev 2020; 15:13. [PMID: 33160402 PMCID: PMC7648993 DOI: 10.1186/s13064-020-00150-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 09/22/2020] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Developing cortical neurons express a tightly choreographed sequence of cytoskeletal and transmembrane proteins to form and strengthen specific synaptic connections during circuit formation. Nectin-3 is a cell-adhesion molecule with previously described roles in synapse formation and maintenance. This protein and its binding partner, nectin-1, are selectively expressed in upper-layer neurons of mouse visual cortex, but their role in the development of cortical circuits is unknown. METHODS Here we block nectin-3 expression (via shRNA) or overexpress nectin-3 in developing layer 2/3 visual cortical neurons using in utero electroporation. We then assay dendritic spine densities at three developmental time points: eye opening (postnatal day (P)14), one week following eye opening after a period of heightened synaptogenesis (P21), and at the close of the critical period for ocular dominance plasticity (P35). RESULTS Knockdown of nectin-3 beginning at E15.5 or ~ P19 increased dendritic spine densities at P21 or P35, respectively. Conversely, overexpressing full length nectin-3 at E15.5 decreased dendritic spine densities when all ages were considered together. The effects of nectin-3 knockdown and overexpression on dendritic spine densities were most significant on proximal secondary apical dendrites. Interestingly, an even greater decrease in dendritic spine densities, particularly on basal dendrites at P21, was observed when we overexpressed nectin-3 lacking its afadin binding domain. CONCLUSION These data collectively suggest that the proper levels and functioning of nectin-3 facilitate normal synapse formation after eye opening on apical and basal dendrites in layer 2/3 of visual cortex.
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Affiliation(s)
- Johanna Tomorsky
- Institute of Neuroscience, University of Oregon, Eugene, OR, 97403, USA.
- Department of Biology, University of Oregon, Eugene, OR, 97403, USA.
- Stanford University, 318 Campus Drive, Stanford, CA, 94305, USA.
| | - Philip R L Parker
- Institute of Neuroscience, University of Oregon, Eugene, OR, 97403, USA
- Department of Biology, University of Oregon, Eugene, OR, 97403, USA
| | - Chris Q Doe
- Institute of Neuroscience, University of Oregon, Eugene, OR, 97403, USA
- Department of Biology, University of Oregon, Eugene, OR, 97403, USA
- Institute of Molecular Biology, University of Oregon, Eugene, OR, 97403, USA
- Howard Hughes Medical Institute, University of Oregon, Eugene, OR, 97403, USA
| | - Cristopher M Niell
- Institute of Neuroscience, University of Oregon, Eugene, OR, 97403, USA.
- Department of Biology, University of Oregon, Eugene, OR, 97403, USA.
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12
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Ma X, Chen K, Cui Y, Huang G, Nehme A, Zhang L, Li H, Wei J, Liong K, Liu Q, Shi L, Wu J, Qiu S. Depletion of microglia in developing cortical circuits reveals its critical role in glutamatergic synapse development, functional connectivity, and critical period plasticity. J Neurosci Res 2020; 98:1968-1986. [PMID: 32594561 DOI: 10.1002/jnr.24641] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 04/23/2020] [Accepted: 04/25/2020] [Indexed: 02/05/2023]
Abstract
Microglia populate the early developing brain and mediate pruning of the central synapses. Yet, little is known on their functional significance in shaping the developing cortical circuits. We hypothesize that the developing cortical circuits require microglia for proper circuit maturation and connectivity, and as such, ablation of microglia during the cortical critical period may result in a long-lasting circuit abnormality. We administered PLX3397, a colony-stimulating factor 1 receptor inhibitor, to mice starting at postnatal day 14 and through P28, which depletes >75% of microglia in the visual cortex (VC). This treatment largely covers the critical period (P19-32) of VC maturation and plasticity. Patch clamp recording in VC layer 2/3 (L2/3) and L5 neurons revealed increased mEPSC frequency and reduced amplitude, and decreased AMPA/NMDA current ratio, indicative of altered synapse maturation. Increased spine density was observed in these neurons, potentially reflecting impaired synapse pruning. In addition, VC intracortical circuit functional connectivity, assessed by laser scanning photostimulation combined with glutamate uncaging, was dramatically altered. Using two photon longitudinal dendritic spine imaging, we confirmed that spine elimination/pruning was diminished during VC critical period when microglia were depleted. Reduced spine pruning thus may account for increased spine density and disrupted connectivity of VC circuits. Lastly, using single-unit recording combined with monocular deprivation, we found that ocular dominance plasticity in the VC was obliterated during the critical period as a result of microglia depletion. These data establish a critical role of microglia in developmental cortical synapse pruning, maturation, functional connectivity, and critical period plasticity.
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Affiliation(s)
- Xiaokuang Ma
- Department of Pharmacology, Shantou University Medical College, Shantou, China
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Ke Chen
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Yuehua Cui
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Guanqun Huang
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
- Guangdong-Hongkong-Macau Institute of CNS Regeneration, Ministry of Education CNS Regeneration Collaborative Joint Laboratory, Jinan University, Guangzhou, China
| | - Antoine Nehme
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Le Zhang
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Handong Li
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Jing Wei
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Katerina Liong
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Qiang Liu
- Barrow Neurological Institute, St. Joseph's Hospital Medical Center, Phoenix, AZ, USA
| | - Lingling Shi
- Guangdong-Hongkong-Macau Institute of CNS Regeneration, Ministry of Education CNS Regeneration Collaborative Joint Laboratory, Jinan University, Guangzhou, China
| | - Jie Wu
- Department of Pharmacology, Shantou University Medical College, Shantou, China
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
- Barrow Neurological Institute, St. Joseph's Hospital Medical Center, Phoenix, AZ, USA
| | - Shenfeng Qiu
- Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
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Roy A, Osik JJ, Meschede-Krasa B, Alford WT, Leman DP, Van Hooser SD. Synaptic and intrinsic mechanisms underlying development of cortical direction selectivity. eLife 2020; 9:e58509. [PMID: 32701059 PMCID: PMC7440916 DOI: 10.7554/elife.58509] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 07/23/2020] [Indexed: 02/02/2023] Open
Abstract
Modifications of synaptic inputs and cell-intrinsic properties both contribute to neuronal plasticity and development. To better understand these mechanisms, we undertook an intracellular analysis of the development of direction selectivity in the ferret visual cortex, which occurs rapidly over a few days after eye opening. We found strong evidence of developmental changes in linear spatiotemporal receptive fields of simple cells, implying alterations in circuit inputs. Further, this receptive field plasticity was accompanied by increases in near-spike-threshold excitability and input-output gain that resulted in dramatically increased spiking responses in the experienced state. Increases in subthreshold membrane responses induced by the receptive field plasticity and the increased input-output spiking gain were both necessary to explain the elevated firing rates in experienced ferrets. These results demonstrate that cortical direction selectivity develops through a combination of plasticity in inputs and in cell-intrinsic properties.
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Affiliation(s)
- Arani Roy
- Department of Biology, Brandeis UniversityWalthamUnited States
- Volen Center for Complex Systems, Brandeis UniversityWalthamUnited States
| | - Jason J Osik
- Department of Biology, Brandeis UniversityWalthamUnited States
- Volen Center for Complex Systems, Brandeis UniversityWalthamUnited States
| | | | - Wesley T Alford
- Department of Biology, Brandeis UniversityWalthamUnited States
| | - Daniel P Leman
- Department of Biology, Brandeis UniversityWalthamUnited States
| | - Stephen D Van Hooser
- Department of Biology, Brandeis UniversityWalthamUnited States
- Volen Center for Complex Systems, Brandeis UniversityWalthamUnited States
- Sloan-Swartz Center for Theoretical Neurobiology Brandeis UniversityWalthamUnited States
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14
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Siok WT, Jia F, Liu CY, Perfetti CA, Tan LH. A Lifespan fMRI Study of Neurodevelopment Associated with Reading Chinese. Cereb Cortex 2020; 30:4140-4157. [PMID: 32108219 PMCID: PMC7264688 DOI: 10.1093/cercor/bhaa038] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/14/2020] [Accepted: 02/01/2020] [Indexed: 11/14/2022] Open
Abstract
We used functional magnetic resonance imaging (fMRI) to map the neural systems involved in reading Chinese in 125 participants 6-74 years old to examine two theoretical issues: how brain structure and function are related in the context of the lifetime neural development of human cognition and whether the neural network for reading is universal or different across languages. Our findings showed that a common network of left frontal and occipital regions typically involved in reading Chinese was recruited across all participants. Crucially, activation in left mid-inferior frontal regions, fusiform and striate-extrastriate sites, premotor cortex, right inferior frontal gyrus, bilateral insula, and supplementary motor area all showed linearly decreasing changes with age. These findings differ from previous findings on alphabetic reading development and suggest that early readers at age 6-7 are already using the same cortical network to process printed words as adults, though the connections among these regions are modulated by reading proficiency, and cortical regions for reading are tuned by experience toward reduced and more focused activation. This fMRI study has demonstrated, for the first time, the neurodevelopment of reading across the lifespan and suggests that learning experience, instead of pre-existing brain structures, determines reading acquisition.
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Affiliation(s)
- Wai Ting Siok
- Department of Linguistics, The University of Hong Kong, Hong Kong
| | - Fanlu Jia
- School of Education and Psychology, University of Jinan, Jinan 250022, China
- Center for Language and Brain, Shenzhen Institute of Neuroscience, Shenzhen 518060, China
| | - Chun Yin Liu
- Department of Linguistics, The University of Hong Kong, Hong Kong
| | - Charles A Perfetti
- Learning Research and Development Center, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Li Hai Tan
- Center for Language and Brain, Shenzhen Institute of Neuroscience, Shenzhen 518060, China
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15
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Natu VS, Gomez J, Barnett M, Jeska B, Kirilina E, Jaeger C, Zhen Z, Cox S, Weiner KS, Weiskopf N, Grill-Spector K. Apparent thinning of human visual cortex during childhood is associated with myelination. Proc Natl Acad Sci U S A 2019; 116:20750-20759. [PMID: 31548375 PMCID: PMC6789966 DOI: 10.1073/pnas.1904931116] [Citation(s) in RCA: 164] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Human cortex appears to thin during childhood development. However, the underlying microstructural mechanisms are unknown. Using functional magnetic resonance imaging (fMRI), quantitative MRI (qMRI), and diffusion MRI (dMRI) in children and adults, we tested what quantitative changes occur to gray and white matter in ventral temporal cortex (VTC) from childhood to adulthood, and how these changes relate to cortical thinning. T1 relaxation time from qMRI and mean diffusivity (MD) from dMRI provide independent and complementary measurements of microstructural properties of gray and white matter tissue. In face- and character-selective regions in lateral VTC, T1 and MD decreased from age 5 to adulthood in mid and deep cortex, as well as in their adjacent white matter. T1 reduction also occurred longitudinally in children's brain regions. T1 and MD decreases 1) were consistent with tissue growth related to myelination, which we verified with adult histological myelin stains, and 2) were correlated with apparent cortical thinning. In contrast, in place-selective cortex in medial VTC, we found no development of T1 or MD after age 5, and thickness was related to cortical morphology. These findings suggest that lateral VTC likely becomes more myelinated from childhood to adulthood, affecting the contrast of MR images and, in turn, the apparent gray-white boundary. These findings are important because they suggest that VTC does not thin during childhood but instead gets more myelinated. Our data have broad ramifications for understanding both typical and atypical brain development using advanced in vivo quantitative measurements and clinical conditions implicating myelin.
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Affiliation(s)
- Vaidehi S Natu
- Department of Psychology, Stanford University, Stanford, CA 94305;
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | - Jesse Gomez
- Neurosciences Program, Stanford University School of Medicine, Stanford, CA 94305
| | - Michael Barnett
- Department of Psychology, University of Pennsylvania, Philadelphia, PA 19104
| | - Brianna Jeska
- Department of Psychology, Stanford University, Stanford, CA 94305
| | - Evgeniya Kirilina
- Department of Neurophysics, Max Planck Institute for Human Cognitive and Brain Sciences, 04103 Leipzig, Germany
- Center for Cognitive Neuroscience Berlin, Free University Berlin, 14195 Berlin, Germany
| | - Carsten Jaeger
- Department of Neurophysics, Max Planck Institute for Human Cognitive and Brain Sciences, 04103 Leipzig, Germany
| | - Zonglei Zhen
- Department of Psychology, Stanford University, Stanford, CA 94305
| | - Siobhan Cox
- Department of Psychology, Stanford University, Stanford, CA 94305
| | - Kevin S Weiner
- Department of Psychology, University of California, Berkeley, CA 94720
- Helen Wills Neuroscience Institute, University of California, Berkeley, CA 94720
| | - Nikolaus Weiskopf
- Department of Neurophysics, Max Planck Institute for Human Cognitive and Brain Sciences, 04103 Leipzig, Germany
| | - Kalanit Grill-Spector
- Department of Psychology, Stanford University, Stanford, CA 94305
- Neurosciences Program, Stanford University School of Medicine, Stanford, CA 94305
- Wu Tsai Neurosciences Institute, Stanford University, Stanford, CA 94305
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16
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Rosen ML, Amso D, McLaughlin KA. The role of the visual association cortex in scaffolding prefrontal cortex development: A novel mechanism linking socioeconomic status and executive function. Dev Cogn Neurosci 2019; 39:100699. [PMID: 31446376 PMCID: PMC6783336 DOI: 10.1016/j.dcn.2019.100699] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 07/22/2019] [Accepted: 08/05/2019] [Indexed: 11/29/2022] Open
Abstract
Socioeconomic status (SES) is associated with executive function (EF) and prefrontal cortex (PFC) development. However, understanding of the specific aspects of SES that influence development of EF and the PFC remains limited. We briefly review existing literature on proposed mechanisms linking SES with EF. Then, we present a novel conceptual model arguing that early cognitive stimulation shapes EF and PFC development. We propose that cognitive stimulation drives lower-level sensory and perceptual processes that may impact EF and PFC development through reciprocal connections between the ventral visual stream and PFC. We argue that caregivers guide attention and associative learning, which provides children the opportunity to regulate attention and gain semantic knowledge. This experience in turn allows for opportunities to train the PFC to resolve conflict between stimuli with overlapping features and engage in increasingly complex computations as visual processing systems develop; this may lay the groundwork for development of EF. We review existing evidence for this model and end by highlighting how this conceptual model could launch future research questions.
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Affiliation(s)
- Maya L Rosen
- Department of Psychology, University of Washington, United States; Department of Psychology, Harvard University, United States.
| | - Dima Amso
- Cognitive, Linguistics, and Psychological Sciences, Brown University, United States
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17
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Abstract
Our assignment was to review the development of the face-processing network, an assignment that carries the presupposition that a face-specific developmental program exists. We hope to cast some doubt on this assumption and instead argue that the development of face processing is guided by the same ubiquitous rules that guide the development of cortex in general.
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Affiliation(s)
- Michael J Arcaro
- Department of Neurobiology, Harvard Medical School, Boston, Massachusetts 02115, USA;
| | - Peter F Schade
- Department of Neurobiology, Harvard Medical School, Boston, Massachusetts 02115, USA;
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18
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Buck JM, O'Neill HC, Stitzel JA. Developmental nicotine exposure elicits multigenerational disequilibria in proBDNF proteolysis and glucocorticoid signaling in the frontal cortices, striata, and hippocampi of adolescent mice. Biochem Pharmacol 2019; 168:438-451. [PMID: 31404529 DOI: 10.1016/j.bcp.2019.08.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 08/07/2019] [Indexed: 01/03/2023]
Abstract
Maternal smoking of conventional or vapor cigarettes during pregnancy, a form of developmental nicotine exposure (DNE), enhances the risk of neurodevelopmental disorders such as ADHD, autism, and schizophrenia in children. Modeling the multigenerational effects of smoking during pregnancy and nursing in the first- (F1) and second- (F2) generation adolescent offspring of oral nicotine-treated female C57BL/6J mice, we have previously reported that DNE precipitates intergenerational transmission of nicotine preference, hyperactivity and impulsivity-like behaviors, altered rhythmicity of home cage activity, corticostriatal nicotinic acetylcholine receptor and dopamine transporter dysfunction, and corticostriatal global DNA methylome deficits. In aggregate, these DNE-evoked behavioral, neuropharmacological, and epigenomic anomalies mirror fundamental etiological aspects of neurodevelopmental disorders including ADHD, autism, and schizophrenia. Expanding this line of research, the current study profiled the multigenerational neurotrophic and neuroendocrine consequences of DNE. Results reveal impaired proBDNF proteolysis as indicated by proBDNF-BDNF imbalance, downregulation of the proBDNF processing enzyme furin, atypical glucocorticoid receptor (GR) activity as implied by decreased relative nuclear GR localization, and deficient basal plasma corticosterone (CORT) levels in adolescent DNE offspring and grandoffspring. Collectively, these data recapitulate the BDNF deficits and HPA axis dysregulation characteristic of neurodevelopmental disorders such as ADHD, autism, and schizophrenia as well as the children of maternal smokers. Notably, as BDNF is a quintessential mediator of neurodevelopment, our prior findings of multigenerational DNE-induced behavioral and neuropharmacological abnormalities may stem from neurodevelopmental insults conferred by the proBDNF-BDNF imbalance detected in DNE mice. Similarly, our findings of multigenerational GR hypoactivity may contribute to the increased risk-taking behaviors and aberrant circadian rhythmicity of home cage activity that we previously documented in first- and second-generation DNE mice.
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Affiliation(s)
- Jordan M Buck
- Institute for Behavioral Genetics, University of Colorado, Boulder, United States; Department of Integrative Physiology, University of Colorado, Boulder, United States.
| | - Heidi C O'Neill
- Institute for Behavioral Genetics, University of Colorado, Boulder, United States
| | - Jerry A Stitzel
- Institute for Behavioral Genetics, University of Colorado, Boulder, United States; Department of Integrative Physiology, University of Colorado, Boulder, United States
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19
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Mohan V, Wade SD, Sullivan CS, Kasten MR, Sweetman C, Stewart R, Truong Y, Schachner M, Manis PB, Maness PF. Close Homolog of L1 Regulates Dendritic Spine Density in the Mouse Cerebral Cortex Through Semaphorin 3B. J Neurosci 2019; 39:6233-6250. [PMID: 31182634 PMCID: PMC6687901 DOI: 10.1523/jneurosci.2984-18.2019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 04/30/2019] [Accepted: 05/30/2019] [Indexed: 02/05/2023] Open
Abstract
Dendritic spines in the developing mammalian neocortex are initially overproduced and then eliminated during adolescence to achieve appropriate levels of excitation in mature networks. We show here that the L1 family cell adhesion molecule Close Homolog of L1 (CHL1) and secreted repellent ligand Semaphorin 3B (Sema3B) function together to induce dendritic spine pruning in developing cortical pyramidal neurons. Loss of CHL1 in null mutant mice in both genders resulted in increased spine density and a greater proportion of immature spines on apical dendrites in the prefrontal and visual cortex. Electron microscopy showed that excitatory spine synapses with postsynaptic densities were increased in the CHL1-null cortex, and electrophysiological recording in prefrontal slices from mutant mice revealed deficiencies in excitatory synaptic transmission. Mechanistically, Sema3B protein induced elimination of spines on apical dendrites of cortical neurons cultured from wild-type but not CHL1-null embryos. Sema3B was secreted by the cortical neuron cultures, and its levels increased when cells were treated with the GABA antagonist gabazine. In vivo CHL1 was coexpressed with Sema3B in pyramidal neuron subpopulations and formed a complex with Sema3B receptor subunits Neuropilin-2 and PlexinA4. CHL1 and NrCAM, a closely related L1 adhesion molecule, localized primarily to distinct spines and promoted spine elimination to Sema3B or Sema3F, respectively. These results support a new concept in which selective spine elimination is achieved through different secreted semaphorins and L1 family adhesion molecules to sculpt functional neural circuits during postnatal maturation.SIGNIFICANCE STATEMENT Dendritic spines in the mammalian neocortex are initially overproduced and then pruned in adolescent life through unclear mechanisms to sculpt maturing cortical circuits. Here, we show that spine and excitatory synapse density of pyramidal neurons in the developing neocortex is regulated by the L1 adhesion molecule, Close Homolog of L1 (CHL1). CHL1 mediated spine pruning in response to the secreted repellent ligand Semaphorin 3B and associated with receptor subunits Neuropilin-2 and PlexinA4. CHL1 and related L1 adhesion molecule NrCAM localized to distinct spines, and promoted spine elimination to Semaphorin 3B and -3F, respectively. These results support a new concept in which selective elimination of individual spines and nascent synapses can be achieved through the action of distinct secreted semaphorins and L1 adhesion molecules.
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Affiliation(s)
| | | | | | - Michael R Kasten
- Department of Otolaryngology/Head and Neck Surgery
- Department of Cell Biology and Physiology
| | | | | | - Young Truong
- Department of Biostatistics, School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Melitta Schachner
- Keck Center for Collaborative Neuroscience, Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, New Jersey 08854, and
- Center for Neuroscience, Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Paul B Manis
- Department of Otolaryngology/Head and Neck Surgery
- Department of Cell Biology and Physiology
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20
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Jack A, Hamad MIK, Gonda S, Gralla S, Pahl S, Hollmann M, Wahle P. Development of Cortical Pyramidal Cell and Interneuronal Dendrites: a Role for Kainate Receptor Subunits and NETO1. Mol Neurobiol 2019; 56:4960-4979. [PMID: 30421168 DOI: 10.1007/s12035-018-1414-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 10/25/2018] [Indexed: 12/18/2022]
Abstract
During neuronal development, AMPA receptors (AMPARs) and NMDA receptors (NMDARs) are important for neuronal differentiation. Kainate receptors (KARs) are closely related to AMPARs and involved in the regulation of cortical network activity. However, their role for neurite growth and differentiation of cortical neurons is unclear. Here, we used KAR agonists and overexpression of selected KAR subunits and their auxiliary neuropilin and tolloid-like proteins, NETOs, to investigate their influence on dendritic growth and network activity in organotypic cultures of rat visual cortex. Kainate at 500 nM enhanced network activity and promoted development of dendrites in layer II/III pyramidal cells, but not interneurons. GluK2 overexpression promoted dendritic growth in pyramidal cells and interneurons. GluK2 transfectants were highly active and acted as drivers for network activity. GluK1 and NETO1 specifically promoted dendritic growth of interneurons. Our study provides new insights for the roles of KARs and NETOs in the morphological and physiological development of the visual cortex.
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Affiliation(s)
- Alexander Jack
- Faculty for Biology and Biotechnology ND 6/72, Developmental Neurobiology, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Mohammad I K Hamad
- Faculty for Biology and Biotechnology ND 6/72, Developmental Neurobiology, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
- Medical Faculty, Neuroanatomy and Molecular Brain Research, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Steffen Gonda
- Faculty for Biology and Biotechnology ND 6/72, Developmental Neurobiology, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Sebastian Gralla
- Faculty for Biology and Biotechnology ND 6/72, Developmental Neurobiology, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Steffen Pahl
- Faculty of Chemistry and Biochemistry, Biochemistry I-Receptor Biochemistry, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Michael Hollmann
- Faculty of Chemistry and Biochemistry, Biochemistry I-Receptor Biochemistry, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Petra Wahle
- Faculty for Biology and Biotechnology ND 6/72, Developmental Neurobiology, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany.
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21
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Baho E, Chattopadhyaya B, Lavertu-Jolin M, Mazziotti R, Awad PN, Chehrazi P, Groleau M, Jahannault-Talignani C, Vaucher E, Ango F, Pizzorusso T, Baroncelli L, Di Cristo G. p75 Neurotrophin Receptor Activation Regulates the Timing of the Maturation of Cortical Parvalbumin Interneuron Connectivity and Promotes Juvenile-like Plasticity in Adult Visual Cortex. J Neurosci 2019; 39:4489-4510. [PMID: 30936240 PMCID: PMC6554620 DOI: 10.1523/jneurosci.2881-18.2019] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 02/22/2019] [Accepted: 03/14/2019] [Indexed: 01/09/2023] Open
Abstract
By virtue of their extensive axonal arborization and perisomatic synaptic targeting, cortical inhibitory parvalbumin (PV) cells strongly regulate principal cell output and plasticity and modulate experience-dependent refinement of cortical circuits during development. An interesting aspect of PV cell connectivity is its prolonged maturation time course, which is completed only by end of adolescence. The p75 neurotrophin receptor (p75NTR) regulates numerous cellular functions; however, its role on cortical circuit development and plasticity remains elusive, mainly because localizing p75NTR expression with cellular and temporal resolution has been challenging. By using RNAscope and a modified version of the proximity ligation assay, we found that p75NTR expression in PV cells decreases between the second and fourth postnatal week, at a time when PV cell synapse numbers increase dramatically. Conditional knockout of p75NTR in single PV neurons in vitro and in PV cell networks in vivo causes precocious formation of PV cell perisomatic innervation and perineural nets around PV cell somata, therefore suggesting that p75NTR expression modulates the timing of maturation of PV cell connectivity in the adolescent cortex. Remarkably, we found that PV cells still express p75NTR in adult mouse cortex of both sexes and that its activation is sufficient to destabilize PV cell connectivity and to restore cortical plasticity following monocular deprivation in vivo Together, our results show that p75NTR activation dynamically regulates PV cell connectivity, and represent a novel tool to foster brain plasticity in adults.SIGNIFICANCE STATEMENT In the cortex, inhibitory, GABA-releasing neurons control the output and plasticity of excitatory neurons. Within this diverse group, parvalbumin-expressing (PV) cells form the larger inhibitory system. PV cell connectivity develops slowly, reaching maturity only at the end of adolescence; however, the mechanisms controlling the timing of its maturation are not well understood. We discovered that the expression of the neurotrophin receptor p75NTR in PV cells inhibits the maturation of their connectivity in a cell-autonomous fashion, both in vitro and in vivo, and that p75NTR activation in adult PV cells promotes their remodeling and restores cortical plasticity. These results reveal a new p75NTR function in the regulation of the time course of PV cell maturation and in limiting cortical plasticity.
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Affiliation(s)
- Elie Baho
- Department of Neurosciences, Université de Montréal, Montréal, Québec H3T 1J4, Canada
- Centre de Recherche, Centre Hospitalier Universitaire Sainte-Justine, Montréal, Québec H3T 1C5, Canada
| | - Bidisha Chattopadhyaya
- Department of Neurosciences, Université de Montréal, Montréal, Québec H3T 1J4, Canada
- Centre de Recherche, Centre Hospitalier Universitaire Sainte-Justine, Montréal, Québec H3T 1C5, Canada
| | - Marisol Lavertu-Jolin
- Department of Neurosciences, Université de Montréal, Montréal, Québec H3T 1J4, Canada
- Centre de Recherche, Centre Hospitalier Universitaire Sainte-Justine, Montréal, Québec H3T 1C5, Canada
| | - Raffaele Mazziotti
- Institute of Neuroscience Consiglio Nazionale delle Ricerche, 56124 Pisa, Italy
| | - Patricia N Awad
- Department of Neurosciences, Université de Montréal, Montréal, Québec H3T 1J4, Canada
- Centre de Recherche, Centre Hospitalier Universitaire Sainte-Justine, Montréal, Québec H3T 1C5, Canada
| | - Pegah Chehrazi
- Department of Neurosciences, Université de Montréal, Montréal, Québec H3T 1J4, Canada
- Centre de Recherche, Centre Hospitalier Universitaire Sainte-Justine, Montréal, Québec H3T 1C5, Canada
| | - Marianne Groleau
- École d'Optométrie, Université de Montréal, Montréal, Québec H3T 1P1, Canada
| | - Celine Jahannault-Talignani
- Institut de Génomique Fonctionnelle, université de Montpellier, Centre National de la Recherche Scientifique, Institut National de la Santé Et de la Recherche Médicale, 34090 Montpellier, France, and
| | - Elvire Vaucher
- École d'Optométrie, Université de Montréal, Montréal, Québec H3T 1P1, Canada
| | - Fabrice Ango
- Institut de Génomique Fonctionnelle, université de Montpellier, Centre National de la Recherche Scientifique, Institut National de la Santé Et de la Recherche Médicale, 34090 Montpellier, France, and
| | - Tommaso Pizzorusso
- Institute of Neuroscience Consiglio Nazionale delle Ricerche, 56124 Pisa, Italy
- Department of Neuroscience, Psychology, Drug Research and Child Health Neurofarba, University of Florence, 50139 Firenze, Italy
| | - Laura Baroncelli
- Institute of Neuroscience Consiglio Nazionale delle Ricerche, 56124 Pisa, Italy
| | - Graziella Di Cristo
- Department of Neurosciences, Université de Montréal, Montréal, Québec H3T 1J4, Canada,
- Centre de Recherche, Centre Hospitalier Universitaire Sainte-Justine, Montréal, Québec H3T 1C5, Canada
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22
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Gomez J, Drain A, Jeska B, Natu VS, Barnett M, Grill-Spector K. Development of population receptive fields in the lateral visual stream improves spatial coding amid stable structural-functional coupling. Neuroimage 2019; 188:59-69. [PMID: 30508682 PMCID: PMC6413531 DOI: 10.1016/j.neuroimage.2018.11.056] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 11/25/2018] [Accepted: 11/30/2018] [Indexed: 12/27/2022] Open
Abstract
Human visual cortex encompasses more than a dozen visual field maps across three major processing streams. One of these streams is the lateral visual stream, which extends from V1 to lateral-occipital (LO) and temporal-occipital (TO) visual field maps and plays a prominent role in shape as well as motion perception. However, it is unknown if and how population receptive fields (pRFs) in the lateral visual stream develop from childhood to adulthood, and what impact this development may have on spatial coding. Here, we used functional magnetic resonance imaging and pRF modeling in school-age children and adults to investigate the development of the lateral visual stream. Our data reveal four main findings: 1) The topographic organization of eccentricity and polar angle maps of the lateral stream is stable after age five. 2) In both age groups there is a reliable relationship between eccentricity map transitions and cortical folding: the middle occipital gyrus predicts the transition between the peripheral representation of LO and TO maps. 3) pRFs in LO and TO maps undergo differential development from childhood to adulthood, resulting in increasing coverage of the central visual field in LO and of the peripheral visual field in TO. 4) Model-based decoding shows that the consequence of pRF and visual field coverage development is improved spatial decoding from LO and TO distributed responses in adults vs. children. Together, these results explicate both the development and topography of the lateral visual stream. Our data show that the general structural-functional organization is laid out early in development, but fine-scale properties, such as pRF distribution across the visual field and consequently, spatial precision, become fine-tuned across childhood development. These findings advance understanding of the development of the human visual system from childhood to adulthood and provide an essential foundation for understanding developmental deficits.
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Affiliation(s)
- Jesse Gomez
- Neurosciences Program, Stanford University School of Medicine, CA, 94305, USA.
| | - Alexis Drain
- Psychology Department, Stanford University, CA, 94305, USA
| | - Brianna Jeska
- Psychology Department, Stanford University, CA, 94305, USA
| | - Vaidehi S Natu
- Psychology Department, Stanford University, CA, 94305, USA
| | - Michael Barnett
- Psychology Department, Stanford University, CA, 94305, USA; Psychology Department, University of Pennsylvania, PA, USA
| | - Kalanit Grill-Spector
- Psychology Department, Stanford University, CA, 94305, USA; Stanford Neurosciences Institute, Stanford University, CA, 94305, USA
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23
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Ribic A, Crair MC, Biederer T. Synapse-Selective Control of Cortical Maturation and Plasticity by Parvalbumin-Autonomous Action of SynCAM 1. Cell Rep 2019; 26:381-393.e6. [PMID: 30625321 PMCID: PMC6345548 DOI: 10.1016/j.celrep.2018.12.069] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 11/05/2018] [Accepted: 12/17/2018] [Indexed: 12/20/2022] Open
Abstract
Cortical plasticity peaks early in life and tapers in adulthood, as exemplified in the primary visual cortex (V1), wherein brief loss of vision in one eye reduces cortical responses to inputs from that eye during the critical period but not in adulthood. The synaptic locus of cortical plasticity and the cell-autonomous synaptic factors determining critical periods remain unclear. We here demonstrate that the immunoglobulin protein Synaptic Cell Adhesion Molecule 1 (SynCAM 1/Cadm1) is regulated by visual experience and limits V1 plasticity. Loss of SynCAM 1 selectively reduces the number of thalamocortical inputs onto parvalbumin (PV+) interneurons, impairing the maturation of feedforward inhibition in V1. SynCAM 1 acts in PV+ interneurons to actively restrict cortical plasticity, and brief PV+-specific knockdown of SynCAM 1 in adult visual cortex restores juvenile-like plasticity. These results identify a synapse-specific, cell-autonomous mechanism for thalamocortical visual circuit maturation and closure of the visual critical period.
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Affiliation(s)
- Adema Ribic
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA 02111, USA.
| | - Michael C Crair
- Department of Neuroscience, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Thomas Biederer
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA 02111, USA.
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24
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Zhang H, Mu L, Wang D, Xia D, Salmon A, Liu Q, Wong‐Riley MTT. Uncovering a critical period of synaptic imbalance during postnatal development of the rat visual cortex: role of brain-derived neurotrophic factor. J Physiol 2018; 596:4511-4536. [PMID: 30055019 PMCID: PMC6138289 DOI: 10.1113/jp275814] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 07/26/2018] [Indexed: 01/17/2023] Open
Abstract
KEY POINTS With daily electrophysiological recordings and neurochemical analysis, we uncovered a transient period of synaptic imbalance between enhanced inhibition and suppressed excitation in rat visual cortical neurons from the end of the fourth toward the end of the fifth postnatal weeks. The expression of brain-derived neurotrophic factor (BDNF), which normally enhances excitation and suppresses inhibition, was down-regulated during that time, suggesting that this may contribute to the inhibition/excitation imbalance. An agonist of the BDNF receptor tropomyosin-related kinase B (TrkB) partially reversed the imbalance, whereas a TrkB antagonist accentuated the imbalance during the transient period. Monocular lid suture during the transient period is more detrimental to the function and neurochemical properties of visual cortical neurons than before or after this period. We regard the period of synaptic imbalance as the peak critical period of vulnerability, and its existence is necessary for neurons to transition from immaturity to a more mature state of functioning. ABSTRACT The mammalian visual cortex is immature at birth and undergoes postnatal structural and functional adjustments. The exact timing of the vulnerable period in rodents remains unclear. The critical period is characterized by inhibitory GABAergic maturation reportedly dependent on brain-derived neurotrophic factor (BDNF). However, most of the studies were performed on experimental/transgenic animals, questioning the relationship in normal animals. The present study aimed to conduct in-depth analyses of the synaptic and neurochemical development of visual cortical neurons in normal and monocularly-deprived rats and to determine specific changes, if any, during the critical period. We found that (i) against a gradual increase in excitation and inhibition with age, a transient period of synaptic and neurochemical imbalance existed with suppressed excitation and enhanced inhibition at postnatal days 28 to 33/34; (ii) during this window, the expression of BDNF and tropomyosin-related kinase B (TrkB) receptors decreased, along with glutamatergic GluN1 and GluA1 receptors and the metabolic marker cytochrome oxidase, whereas that of GABAA Rα1 receptors continued to rise; (iii) monocular deprivation reduced both excitatory and inhibitory synaptic activity and neurochemicals mainly during this period; and (iv) in vivo TrkB agonist partially reversed the synaptic imbalance in normal and monocularly-deprived neurons during this time, whereas a TrkB antagonist accentuated the imbalance. Thus, our findings highlight a transitory period of synaptic imbalance with a negative relationship between BDNF and inhibitory GABA. This brief critical period may be necessary in transitioning from an immature to a more mature state of visual cortical functioning.
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Affiliation(s)
- Hanmeng Zhang
- Department of Cell Biology, Neurobiology and AnatomyMedical College of WisconsinMilwaukeeWIUSA
| | - Lianwei Mu
- Department of Cell Biology, Neurobiology and AnatomyMedical College of WisconsinMilwaukeeWIUSA
| | - Dandan Wang
- Department of Cell Biology, Neurobiology and AnatomyMedical College of WisconsinMilwaukeeWIUSA
| | - Dongdong Xia
- Department of Cell Biology, Neurobiology and AnatomyMedical College of WisconsinMilwaukeeWIUSA
| | - Alexander Salmon
- Department of Cell Biology, Neurobiology and AnatomyMedical College of WisconsinMilwaukeeWIUSA
| | - Qiuli Liu
- Department of Cell Biology, Neurobiology and AnatomyMedical College of WisconsinMilwaukeeWIUSA
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25
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Abstract
These are only a few examples of how learning occurs during development by a process of sculpturing, selecting among the possible variations, combinations and sequences of actions. This is how we build up what may be called programs in the brain (Young 1978). The physiologist will say that these are only, as it were, metaphorical statements, not detailed descriptions of known brain actions. ‘The programmes of elaborate sequences of movement, built up over the course of many years, are not yet on the agenda of practical neurophysiology’ (Phillips & Porter 1978, p 333). Perhaps this statement may prove to be over-pessimistic, as I am sure the authors would hope. Studies of learning, of which I have tried to give a small sample, do begin to show us how programs are assembled by selecting from the vast number of possibilities that are available and then increasing the reliability of the chosen actions. It is particularly pleasing to find that we can begin to understand the various principles that are involved. In Aplysia we see something of them due to the cellular changes. In Octopus we see how learning involves different pieces of neuronal machinery. One serves to distribute signals to allow access to the full repertoire of possibilities. Another part distributes and balances rewards and penalties. In a third the actual learning change occurs and the many minute cells suggest that we may look for the origin of learning among reciprocal reflexes. In the vertebrate brain we see the multiplication of neuronal patterns and centres greatly increased. We get glimpses of how various parts of the brain cooperate in building and executing the programs. Learning involves many parts of the brain, each contributing in a different way. The cerebellum perhaps provides the repertoire of small variations in muscular contraction out of which those are selected that perform the acts that prove necessary. Perhaps the motivations to do these correctly come partly from the aminergic pathways such as those of the locus ceruleus, while the hippocampus provides the power to seek to make new ones. And of course the cerebral cortex and its attendant input and output centres provides the biggest repertoire of all, selection among whose modules has allowed us to build and use a program that studies itself. Surely John Hughlings Jackson would have rejoiced that there has been some advance in understanding of the ‘Relations of Different Divisions of the Central Nervous System to One Another and to Parts of the Body’, which was the title of the first Hughlings Jackson lecture, which he himself gave in 1897.
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26
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Jenks KR, Kim T, Pastuzyn ED, Okuno H, Taibi AV, Bito H, Bear MF, Shepherd JD. Arc restores juvenile plasticity in adult mouse visual cortex. Proc Natl Acad Sci U S A 2017; 114:9182-9187. [PMID: 28790183 PMCID: PMC5576785 DOI: 10.1073/pnas.1700866114] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The molecular basis for the decline in experience-dependent neural plasticity over age remains poorly understood. In visual cortex, the robust plasticity induced in juvenile mice by brief monocular deprivation during the critical period is abrogated by genetic deletion of Arc, an activity-dependent regulator of excitatory synaptic modification. Here, we report that augmenting Arc expression in adult mice prolongs juvenile-like plasticity in visual cortex, as assessed by recordings of ocular dominance (OD) plasticity in vivo. A distinguishing characteristic of juvenile OD plasticity is the weakening of deprived-eye responses, believed to be accounted for by the mechanisms of homosynaptic long-term depression (LTD). Accordingly, we also found increased LTD in visual cortex of adult mice with augmented Arc expression and impaired LTD in visual cortex of juvenile mice that lack Arc or have been treated in vivo with a protein synthesis inhibitor. Further, we found that although activity-dependent expression of Arc mRNA does not change with age, expression of Arc protein is maximal during the critical period and declines in adulthood. Finally, we show that acute augmentation of Arc expression in wild-type adult mouse visual cortex is sufficient to restore juvenile-like plasticity. Together, our findings suggest a unifying molecular explanation for the age- and activity-dependent modulation of synaptic sensitivity to deprivation.
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Affiliation(s)
- Kyle R Jenks
- Department of Neurobiology and Anatomy, University of Utah, Salt Lake City, UT 84112
| | - Taekeun Kim
- The Picower Institute for Learning and Memory, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Elissa D Pastuzyn
- Department of Neurobiology and Anatomy, University of Utah, Salt Lake City, UT 84112
| | - Hiroyuki Okuno
- Medical Innovation Center, Kyoto University Graduate School of Medicine, Sakyo-ku, Kyoto 606-8507, Japan
- Department of Neurochemistry, Graduate School of Medicine, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Andrew V Taibi
- Department of Neurobiology and Anatomy, University of Utah, Salt Lake City, UT 84112
| | - Haruhiko Bito
- Department of Neurochemistry, Graduate School of Medicine, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Mark F Bear
- The Picower Institute for Learning and Memory, Massachusetts Institute of Technology, Cambridge, MA 02139;
| | - Jason D Shepherd
- Department of Neurobiology and Anatomy, University of Utah, Salt Lake City, UT 84112;
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27
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Abstract
Two distinct areas along the ventral visual stream of monkeys, the primary visual (V1) and inferior temporal (TE) cortices, exhibit different projection patterns of intrinsic horizontal axons with patchy terminal fields in adult animals. The differences between the patches in these 2 areas may reflect differences in cortical representation and processing of visual information. We studied the postnatal development of patches by injecting an anterograde tracer into TE and V1 in monkeys of various ages. At 1 week of age, labeled patches with distribution patterns reminiscent of those in adults were already present in both areas. The labeling intensity of patches decayed exponentially with projection distance in monkeys of all ages in both areas, but this trend was far less evident in TE. The number and extent of patches gradually decreased with age in V1, but not in TE. In V1, axonal and bouton densities increased postnatally only in patches with short projection distances, whereas in TE this density change occurred in patches with various projection distances. Thus, patches with area-specific distribution patterns are formed early in life, and area-specific postnatal developmental processes shape the connectivity of patches into adulthood.
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Affiliation(s)
- Quanxin Wang
- Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Corporation, Toyonaka, Osaka 560-8537, Japan
- The Allen Institute for Brain Science, Seattle, WA 98109, USA
| | - Hisashi Tanigawa
- Department of Cognitive Neuroscience, Osaka University Medical School, Suita, Osaka 565-0871, Japan
- Center for Transdisciplinary Research, Niigata University, Niigata, Niigata 950-2181, Japan
| | - Ichiro Fujita
- Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Corporation, Toyonaka, Osaka 560-8537, Japan
- Department of Cognitive Neuroscience, Osaka University Medical School, Suita, Osaka 565-0871, Japan
- Graduate School of Frontier Biosciences and Center for Information and Neural Networks, Osaka University and National Institute of Information and Communications Technology, Suita, Osaka 565-0871, Japan
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28
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Baroncelli L, Cenni MC, Melani R, Deidda G, Landi S, Narducci R, Cancedda L, Maffei L, Berardi N. Early IGF-1 primes visual cortex maturation and accelerates developmental switch between NKCC1 and KCC2 chloride transporters in enriched animals. Neuropharmacology 2017; 113:167-177. [PMID: 26924708 DOI: 10.1016/j.neuropharm.2016.02.034] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 02/01/2016] [Accepted: 02/24/2016] [Indexed: 12/17/2022]
Abstract
Environmental enrichment (EE) has a remarkable impact on brain development. Continuous exposure to EE from birth determines a significant acceleration of visual system maturation both at retinal and cortical levels. A pre-weaning enriched experience is sufficient to trigger the accelerated maturation of the visual system, suggesting that factors affected by EE during the first days of life might prime visual circuits towards a faster development. The search for such factors is crucial not only to gain a better understanding of the molecular hierarchy of brain development but also to identify molecular pathways amenable to be targeted to correct atypical brain developmental trajectories. Here, we showed that IGF-1 levels are increased in the visual cortex of EE rats as early as P6 and this is a crucial event for setting in motion the developmental program induced by EE. Early intracerebroventricular (i.c.v.) infusion of IGF-1 in standard rats was sufficient to mimic the action of EE on visual acuity development, whereas blocking IGF-1 signaling by i.c.v. injections of the IGF-1 receptor antagonist JB1 prevented the deployment of EE effects. Early IGF-1 decreased the ratio between the expression of NKCC1 and KCC2 cation/chloride transporters, and the reversal potential for GABAAR-driven Cl- currents (ECl) was shifted toward more negative potentials, indicating that IGF-1 is a crucial factor in accelerating the maturation of GABAergic neurotransmission and promoting the developmental switch of GABA polarity from excitation to inhibition. In addition, early IGF-1 promoted a later occurring increase in its own expression, suggesting a priming effect of early IGF-1 in driving post-weaning cortical maturation.
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Affiliation(s)
- Laura Baroncelli
- Institute of Neuroscience CNR, via Moruzzi 1, I-56124, Pisa, Italy.
| | | | - Riccardo Melani
- Institute of Neuroscience CNR, via Moruzzi 1, I-56124, Pisa, Italy; Department of Neuroscience, Psychology, Drug Research, Child Health (NEUROFARBA), University of Florence, Piazza San Marco 4, I-50121, Florence, Italy
| | - Gabriele Deidda
- Department of Neuroscience and Brain Technologies, Istituto Italiano di Tecnologia, Via Morego 30, I-16163, Genoa, Italy
| | - Silvia Landi
- Institute of Neuroscience CNR, via Moruzzi 1, I-56124, Pisa, Italy
| | - Roberta Narducci
- Department of Neuroscience, Psychology, Drug Research, Child Health (NEUROFARBA), University of Florence, Piazza San Marco 4, I-50121, Florence, Italy
| | - Laura Cancedda
- Department of Neuroscience and Brain Technologies, Istituto Italiano di Tecnologia, Via Morego 30, I-16163, Genoa, Italy
| | - Lamberto Maffei
- Institute of Neuroscience CNR, via Moruzzi 1, I-56124, Pisa, Italy; Laboratory of Neurobiology, Scuola Normale Superiore, Piazza Cavalieri 7, I-56126, Pisa, Italy
| | - Nicoletta Berardi
- Institute of Neuroscience CNR, via Moruzzi 1, I-56124, Pisa, Italy; Department of Neuroscience, Psychology, Drug Research, Child Health (NEUROFARBA), University of Florence, Piazza San Marco 4, I-50121, Florence, Italy
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29
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Tong L, Xie Y, Yu H. The temporal-spatial dynamics of feature maps during monocular deprivation revealed by chronic imaging and self-organization model simulation. Neuroscience 2016; 339:571-586. [PMID: 27746342 DOI: 10.1016/j.neuroscience.2016.10.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 09/30/2016] [Accepted: 10/03/2016] [Indexed: 11/18/2022]
Abstract
Experiments on the adult visual cortex of cats, ferrets and monkeys have revealed organized spatial relationships between multiple feature maps which can also be reproduced by the Kohonen and elastic net self-organization models. However, attempts to apply these models to simulate the temporal kinetics of monocular deprivation (MD) during the critical period, and their effects on the spatial arrangement of feature maps, have led to conflicting results. In this study, we performed MD and chronic imaging in the ferret visual cortex during the critical period of ocular dominance (OD) plasticity. We also used the Kohonen model to simulate the effects of MD on OD and orientation map development. Both the experiments and simulations demonstrated two general parameter-insensitive findings. Specifically, our first finding demonstrated that the OD index shift resulting from MD, and its subsequent recovery during binocular vision (BV), were both nonlinear, with a significantly stronger shift occurring during the initial period. Meanwhile, spatial reorganization of feature maps led to globally unchanged but locally shifted map patterns. In detail, we found that the periodicity of OD and orientation maps remained unchanged during, and after, deprivation. Relationships between OD and orientation maps remained similar but were significantly weakened due to OD border shifts. These results indicate that orthogonal gradient relationships between maps may be preset and are only mildly modifiable during the critical period. The Kohonen model was able to reproduce these experimental results, hence its role is further extended to the description of cortical feature map dynamics during development.
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Affiliation(s)
- Lei Tong
- School of Life Sciences and the State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Fudan University, 2005 Songhu Road, Shanghai, China
| | - Yang Xie
- School of Life Sciences and the State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Fudan University, 2005 Songhu Road, Shanghai, China
| | - Hongbo Yu
- School of Life Sciences and the State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Fudan University, 2005 Songhu Road, Shanghai, China.
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30
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Merkulyeva NS, Bugrova VS, Bondar IV. [CAT’S VISUAL AREA 18 INTERMODULAR INTERACTIONS DEVELOPMENT UNDER DIFFERENT VISUAL ENVIRONMENT]. Ross Fiziol Zh Im I M Sechenova 2016; 102:1156-1164. [PMID: 30193433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Primary visual cortex contains a set of modules, and their postnatal development depends on a combination of internal genetic and external (defined by visual environment) factors. In order to examine a development of intermodular interactions in visual cortex of kittens subjected to rhythmic light stimulation (15 Hz and 50 Hz frequencies, groups RLS-15 and RLS-50), we investigate an intermodular signal correlation by mean of optical imaging technique. Data was compared with control kittens and with kittens reared with no visual experience in total darkness (group DARK). A significant reduction of the intermodular correlation coefficient was obtained in the group RLS-15; the correlation coefficient values in the groups RLS-50 and DARK was not affected. Thus 15 Hz rhythmic light stimulation during sensitive periods of development disrupts an efficacy of intermodular neuronal connections.
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31
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Abstract
A key goal of behavioral and cognitive neuroscience is to link brain mechanisms to behavioral functions. The present article describes recent progress toward explaining how the visual cortex sees. Visual cortex, like many parts of perceptual and cognitive neocortex, is organized into six main layers of cells, as well as characteristic sublamina. Here it is proposed how these layered circuits help to realize processes of development, learning, perceptual grouping, attention, and 3-D vision through a combination of bottom-up, horizontal, and top-down interactions. A main theme is that the mechanisms which enable development and learning to occur in a stable way imply properties of adult behavior. These results thus begin to unify three fields: infant cortical development, adult cortical neurophysiology and anatomy, and adult visual perception. The identified cortical mechanisms promise to generalize to explain how other perceptual and cognitive processes work.
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32
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Shanks JA, Ito S, Schaevitz L, Yamada J, Chen B, Litke A, Feldheim DA. Corticothalamic Axons Are Essential for Retinal Ganglion Cell Axon Targeting to the Mouse Dorsal Lateral Geniculate Nucleus. J Neurosci 2016. [PMID: 27170123 DOI: 10.6080/k07d2s2f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2023] Open
Abstract
UNLABELLED Retinal ganglion cells (RGCs) relay information about the outside world to multiple subcortical targets within the brain. This information is either used to dictate reflexive behaviors or relayed to the visual cortex for further processing. Many subcortical visual nuclei also receive descending inputs from projection neurons in the visual cortex. Most areas receive inputs from layer 5 cortical neurons in the visual cortex but one exception is the dorsal lateral geniculate nucleus (dLGN), which receives layer 6 inputs and is also the only RGC target that sends direct projections to the cortex. Here we ask how visual system development and function changes in mice that develop without a cortex. We find that the development of a cortex is essential for RGC axons to terminate in the dLGN, but is not required for targeting RGC axons to other subcortical nuclei. RGC axons also fail to target to the dLGN in mice that specifically lack cortical layer 6 projections to the dLGN. Finally, we show that when mice develop without a cortex they can still perform a number of vision-dependent tasks. SIGNIFICANCE STATEMENT The dorsal lateral geniculate nucleus (dLGN) is a sensory thalamic relay area that receives feedforward inputs from retinal ganglion cells (RGCs) in the retina, and feed back inputs from layer 6 neurons in the visual cortex. In this study we examined genetically manipulated mice that develop without a cortex or without cortical layer 6 axonal projections, and find that RGC axons fail to project to the dLGN. Other RGC recipient areas, such as the superior colliculus and suprachiasmatic nucleus, are targeted normally. These results provide support for a new mechanism of target selection that may be specific to the thalamus, whereby descending cortical axons provide an activity that promotes feedforward targeting of RGC axons to the dLGN.
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Affiliation(s)
- James A Shanks
- Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, California 95064
| | - Shinya Ito
- Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, Santa Cruz, California 95064, and
| | - Laura Schaevitz
- Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, California 95064, Department of Biology, Trinity College, Hartford, Connecticut 06106
| | - Jena Yamada
- Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, California 95064
| | - Bin Chen
- Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, California 95064
| | - Alan Litke
- Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, Santa Cruz, California 95064, and
| | - David A Feldheim
- Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, California 95064,
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Crawford MA, Wang Y, Forsyth S, Brenna JT. The European Food Safety Authority recommendation for polyunsaturated fatty acid composition of infant formula overrules breast milk, puts infants at risk, and should be revised. Prostaglandins Leukot Essent Fatty Acids 2015; 102-103:1-3. [PMID: 26432509 DOI: 10.1016/j.plefa.2015.07.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 07/20/2015] [Accepted: 07/20/2015] [Indexed: 11/17/2022]
Abstract
The European Food Safety Authority (EFSA) has concluded from a limited review of the literature that although docosahexaenoic acid (DHA) is required for infant formula, arachidonic acid is not required "even in the presence of DHA" (EFSA Journal, 12 (2014) 3760). This flawed opinion is grounded in human trials which tested functionality of DHA in neural outcomes and included arachidonic acid ostensibly to support growth. The EFSA report mistakes a nutrient ubiquitous in the diets of newborn infants, through breast milk and with wide-ranging health and neurodevelopmental effects, for an optional drug targeted to a particular outcome that is properly excluded when no benefit is found for that particular outcome. Arachidonic acid has very different biological functions compared to DHA, for example, arachidonic acid has unique functions in the vasculature and in specific aspects of immunity. Indeed, the overwhelming majority of trials include both DHA and arachidonic acid, and test development specific to DHA such as neural and visual development. DHA suppresses membrane arachidonic acid concentrations and its function. An infant formula with DHA and no arachidonic acid runs the risk of cardio and cerebrovascular morbidity and even mortality through suppression of the favorable oxylipin derivatives of arachidonic acid. The EFSA recommendation overruling breast milk composition should be revised forthwith, otherwise being unsafe, ungrounded in most of the evidence, and risking lifelong disability.
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Affiliation(s)
- Michael A Crawford
- Reproductive Physiology, Chelsea and Westminster Hospital Campus of Imperial College, London SW10 9NH, UK.
| | - Yiqun Wang
- Reproductive Physiology, Chelsea and Westminster Hospital Campus of Imperial College, London SW10 9NH, UK
| | - Stewart Forsyth
- Honorary Professor of Paediatrics, University of Dundee, West Ferry, Dundee, UK.
| | - J Thomas Brenna
- Division of Nutritional Sciences, Cornell University, Ithaca, NY 14853, USA.
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Takeda-Uchimura Y, Uchimura K, Sugimura T, Yanagawa Y, Kawasaki T, Komatsu Y, Kadomatsu K. Requirement of keratan sulfate proteoglycan phosphacan with a specific sulfation pattern for critical period plasticity in the visual cortex. Exp Neurol 2015; 274:145-55. [PMID: 26277687 DOI: 10.1016/j.expneurol.2015.08.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 07/16/2015] [Accepted: 08/06/2015] [Indexed: 01/23/2023]
Abstract
Proteoglycans play important roles in regulating the development and functions of the brain. They consist of a core protein and glycosaminoglycans, which are long sugar chains of repeating disaccharide units with sulfation. A recent study demonstrated that the sulfation pattern of chondroitin sulfate on proteoglycans contributes to regulation of the critical period of experience-dependent plasticity in the mouse visual cortex. In the present study, we investigated the role of keratan sulfate (KS), another glycosaminoglycan, in critical period plasticity in the mouse visual cortex. Immunohistochemical analyses demonstrated the presence of KS containing disaccharide units of N-acetylglucosamine (GlcNAc)-6-sulfate and nonsulfated galactose during the critical period, although KS containing disaccharide units of GlcNAc-6-sulfate and galactose-6-sulfate was already known to disappear before that period. The KS chains were distributed diffusely in the extracellular space and densely around the soma of a large population of excitatory and inhibitory neurons. Electron microscopic analysis revealed that the KS was localized within the perisynaptic spaces and dendrites but not in presynaptic sites. KS was mainly located on phosphacan. In mice deficient in GlcNAc-6-O-sulfotransferase 1, which is one of the enzymes necessary for the synthesis of KS chains, the expression of KS was one half that in wild-type mice. In the knockout mice, monocular deprivation during the critical period resulted in a depression of deprived-eye responses but failed to produce potentiation of nondeprived-eye responses. In addition, T-type Ca(2+) channel-dependent long-term potentiation (LTP), which occurs only during the critical period, was not observed. These results suggest that regulation by KS-phosphacan with a specific sulfation pattern is necessary for the generation of LTP and hence the potentiation of nondeprived-eye responses after monocular deprivation.
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Affiliation(s)
- Yoshiko Takeda-Uchimura
- Department of Biochemistry, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan; Department of Neuroscience, Research Institute of Environmental Medicine, Nagoya University, Nagoya 464-8601, Japan
| | - Kenji Uchimura
- Department of Biochemistry, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Taketoshi Sugimura
- Department of Neuroscience, Research Institute of Environmental Medicine, Nagoya University, Nagoya 464-8601, Japan
| | - Yuchio Yanagawa
- Department of Genetic and Behavioral Neuroscience, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Toshisuke Kawasaki
- Research Center for Glycobiotechnology, Ritsumeikan University, Noji-Higashi 1-1-1, Kusatsu, Shiga 525-8577, Japan
| | - Yukio Komatsu
- Department of Neuroscience, Research Institute of Environmental Medicine, Nagoya University, Nagoya 464-8601, Japan.
| | - Kenji Kadomatsu
- Department of Biochemistry, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan.
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Davis MF, Figueroa Velez DX, Guevarra RP, Yang MC, Habeeb M, Carathedathu MC, Gandhi SP. Inhibitory Neuron Transplantation into Adult Visual Cortex Creates a New Critical Period that Rescues Impaired Vision. Neuron 2015; 86:1055-1066. [PMID: 25937171 DOI: 10.1016/j.neuron.2015.03.062] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 02/06/2015] [Accepted: 03/23/2015] [Indexed: 11/19/2022]
Abstract
The maturation of inhibitory circuits in juvenile visual cortex triggers a critical period in the development of the visual system. Although several manipulations of inhibition can alter the timing of the critical period, none have demonstrated the creation of a new critical period in adulthood. We developed a transplantation method to reactivate critical period plasticity in the adult visual cortex. Transplanted embryonic inhibitory neurons from the medial ganglionic eminence reinstate ocular dominance plasticity in adult recipients. Transplanted inhibitory cells develop cell-type-appropriate molecular characteristics and visually evoked responses. In adult mice impaired by deprivation during the juvenile critical period, transplantation also recovers both visual cortical responses and performance on a behavioral test of visual acuity. Plasticity and recovery are induced when the critical period would have occurred in the donor animal. These results reveal that the focal reactivation of visual cortical plasticity using inhibitory cell transplantation creates a new critical period that restores visual perception after childhood deprivation.
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Affiliation(s)
- Melissa F Davis
- Department of Neurobiology and Behavior, University of California, Irvine, CA 92697, USA
| | - Dario X Figueroa Velez
- Department of Neurobiology and Behavior, University of California, Irvine, CA 92697, USA
| | - Roblen P Guevarra
- Department of Neurobiology and Behavior, University of California, Irvine, CA 92697, USA
| | - Michael C Yang
- Department of Neurobiology and Behavior, University of California, Irvine, CA 92697, USA
| | - Mariyam Habeeb
- Department of Neurobiology and Behavior, University of California, Irvine, CA 92697, USA
| | - Mathew C Carathedathu
- Department of Neurobiology and Behavior, University of California, Irvine, CA 92697, USA
| | - Sunil P Gandhi
- Department of Neurobiology and Behavior, University of California, Irvine, CA 92697, USA.
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Abstract
Circadian rhythms control a variety of physiological processes, but whether they may also time brain development remains largely unknown. Here, we show that circadian clock genes control the onset of critical period plasticity in the neocortex. Within visual cortex of Clock-deficient mice, the emergence of circadian gene expression was dampened, and the maturation of inhibitory parvalbumin (PV) cell networks slowed. Loss of visual acuity in response to brief monocular deprivation was concomitantly delayed and rescued by direct enhancement of GABAergic transmission. Conditional deletion of Clock or Bmal1 only within PV cells recapitulated the results of total Clock-deficient mice. Unique downstream gene sets controlling synaptic events and cellular homeostasis for proper maturation and maintenance were found to be mis-regulated by Clock deletion specifically within PV cells. These data demonstrate a developmental role for circadian clock genes outside the suprachiasmatic nucleus, which may contribute mis-timed brain plasticity in associated mental disorders.
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Affiliation(s)
- Yohei Kobayashi
- Center for Brain Science, Department of Molecular Cellular Biology, Harvard University, 52 Oxford Street, Cambridge, MA 02138, USA; F.M. Kirby Neurobiology Center, Department of Neurology, Boston Children's Hospital, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA
| | - Zhanlei Ye
- Center for Brain Science, Department of Molecular Cellular Biology, Harvard University, 52 Oxford Street, Cambridge, MA 02138, USA
| | - Takao K Hensch
- Center for Brain Science, Department of Molecular Cellular Biology, Harvard University, 52 Oxford Street, Cambridge, MA 02138, USA; F.M. Kirby Neurobiology Center, Department of Neurology, Boston Children's Hospital, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA.
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Stettler O, Moya KL. Distinct roles of homeoproteins in brain topographic mapping and in neural circuit formation. Semin Cell Dev Biol 2014; 35:165-72. [PMID: 25042849 DOI: 10.1016/j.semcdb.2014.07.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 07/07/2014] [Indexed: 01/02/2023]
Abstract
The construction of the brain is a highly regulated process, requiring coordination of various cellular and molecular mechanisms that together ensure the stability of the cerebrum architecture and functions. The mature brain is an organ that performs complex computational operations using specific sensory information from the outside world and this requires precise organization within sensory networks and a separation of sensory modalities during development. We review here the role of homeoproteins in the arealization of the brain according to sensorimotor functions, the micropartition of its cytoarchitecture, and the maturation of its sensory circuitry. One of the most interesting observation about homeoproteins in recent years concerns their ability to act both in a cell-autonomous and non-cell-autonomous manner. The highlights in the present review collectively show how these two modes of action of homeoproteins confer various functions in shaping cortical maps.
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Affiliation(s)
- Olivier Stettler
- Laboratoire CRRET EAC 7149, Université Paris-Est Créteil, 61, Av. du Général de Gaulle, 94010 Créteil Cedex, France.
| | - Kenneth L Moya
- Collège de France, Center for Interdisciplinary Research in Biology, UMR CNRS 7241/INSERM U1050, 11 place Marcelin Berthelot, 75005 Paris, France; Labex Memolife, PSL Research University, France
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38
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Van Hooser SD, Escobar GM, Maffei A, Miller P. Emerging feed-forward inhibition allows the robust formation of direction selectivity in the developing ferret visual cortex. J Neurophysiol 2014; 111:2355-73. [PMID: 24598528 PMCID: PMC4099478 DOI: 10.1152/jn.00891.2013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 03/03/2014] [Indexed: 11/22/2022] Open
Abstract
The computation of direction selectivity requires that a cell respond to joint spatial and temporal characteristics of the stimulus that cannot be separated into independent components. Direction selectivity in ferret visual cortex is not present at the time of eye opening but instead develops in the days and weeks following eye opening in a process that requires visual experience with moving stimuli. Classic Hebbian or spike timing-dependent modification of excitatory feed-forward synaptic inputs is unable to produce direction-selective cells from unselective or weakly directionally biased initial conditions because inputs eventually grow so strong that they can independently drive cortical neurons, violating the joint spatial-temporal activation requirement. Furthermore, without some form of synaptic competition, cells cannot develop direction selectivity in response to training with bidirectional stimulation, as cells in ferret visual cortex do. We show that imposing a maximum lateral geniculate nucleus (LGN)-to-cortex synaptic weight allows neurons to develop direction-selective responses that maintain the requirement for joint spatial and temporal activation. We demonstrate that a novel form of inhibitory plasticity, postsynaptic activity-dependent long-term potentiation of inhibition (POSD-LTPi), which operates in the developing cortex at the time of eye opening, can provide synaptic competition and enables robust development of direction-selective receptive fields with unidirectional or bidirectional stimulation. We propose a general model of the development of spatiotemporal receptive fields that consists of two phases: an experience-independent establishment of initial biases, followed by an experience-dependent amplification or modification of these biases via correlation-based plasticity of excitatory inputs that compete against gradually increasing feed-forward inhibition.
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Affiliation(s)
- Stephen D Van Hooser
- Department of Biology, Brandeis University, Waltham, Massachusetts; Sloan-Swartz Center for Theoretical Neurobiology, Brandeis University, Waltham, Massachusetts; Volen Center for Complex Systems, Brandeis University, Waltham, Massachusetts;
| | - Gina M Escobar
- Department of Biology, Brandeis University, Waltham, Massachusetts; Sloan-Swartz Center for Theoretical Neurobiology, Brandeis University, Waltham, Massachusetts; Volen Center for Complex Systems, Brandeis University, Waltham, Massachusetts
| | - Arianna Maffei
- Department of Neurobiology and Behavior, State University of New York-Stony Brook, Stony Brook, New York; and SUNY Eye Institute, State University of New York-Stony Brook, Stony Brook, New York
| | - Paul Miller
- Department of Biology, Brandeis University, Waltham, Massachusetts; Sloan-Swartz Center for Theoretical Neurobiology, Brandeis University, Waltham, Massachusetts; Volen Center for Complex Systems, Brandeis University, Waltham, Massachusetts
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Burger KS, Stice E. Neural responsivity during soft drink intake, anticipation, and advertisement exposure in habitually consuming youth. Obesity (Silver Spring) 2014; 22:441-50. [PMID: 23836764 PMCID: PMC4005612 DOI: 10.1002/oby.20563] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 06/17/2013] [Indexed: 11/09/2022]
Abstract
OBJECTIVE Although soft drinks are heavily advertised, widely consumed, and have been associated with obesity, little is understood regarding neural responsivity to soft drink intake, anticipated intake, and advertisements. DESIGN AND METHODS Functional MRI was used to assess examine neural response to carbonated soft drink intake, anticipated intake and advertisement exposure as well as milkshake intake in 27 adolescents that varied on soft drink consumer status. RESULTS Intake and anticipated intake of carbonated Coke® activated regions implicated in gustatory, oral somatosensory, and reward processing, yet high-fat/sugar milkshake intake elicited greater activation in these regions vs. Coke intake. Advertisements highlighting the Coke product vs. nonfood control advertisements, but not the Coke logo, activated gustatory and visual brain regions. Habitual Coke consumers vs. nonconsumers showed greater posterior cingulate responsivity to Coke logo ads, suggesting that the logo is a conditioned cue. Coke consumers exhibited less ventrolateral prefrontal cortex responsivity during anticipated Coke intake relative to nonconsumers. CONCLUSIONS Results indicate that soft drinks activate reward and gustatory regions, but are less potent in activating these regions than high-fat/sugar beverages, and imply that habitual soft drink intake promotes hyper-responsivity of regions encoding salience/attention toward brand specific cues and hypo-responsivity of inhibitory regions while anticipating intake.
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Tinelli F, Bulgheroni S, Mazzotti S, Vago C, Groppo M, Scaramuzzo RT, Riva D, Cioni G. Ventral stream sensitivity in "healthy" preterm-born adolescents: psychophysical and neuropsychological evaluation. Early Hum Dev 2014; 90:45-9. [PMID: 24284081 DOI: 10.1016/j.earlhumdev.2013.10.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 10/23/2013] [Accepted: 10/23/2013] [Indexed: 11/19/2022]
Abstract
BACKGROUND Deficits of motion processing have been reported in premature and very low birth-weight subjects during infancy, childhood and adolescence. Less is known about ventral stream functioning in preterms. AIM The aim of this study is to investigate ventral stream functioning in a sample of "healthy" adolescents born preterm with normal outcome and without brain damage. STUDY DESIGN We enrolled thirty preterm-born adolescents (mean age: 14.2years, mean gestational age 28.9weeks, mean birth weight 1097g), and 34 age-matched term-born controls (mean age: 14.5years). All subjects were administered a psychophysical test known as "Form Coherence Task" and a comprehensive standardized battery of neuropsychological tests suitable for investigating ventral stream functioning including Street Completion Test, Poppelreuter-Ghent Test and the first part of the Visual Object and Space Perception (VOSP) battery. Dorsal stream visual functioning was investigated by the second part of the VOSP. RESULTS Preterm (PT) subjects showed the same results in all "ventral" tasks with respect to full-term controls without any correlation to gestational age or birth weight. We found a significant negative correlation between Form Coherence Task and Letters Task (p=.014) and between Form Coherence and Silhouette Tasks (p=.017). No correlation was observed between Form Coherence Task and Street and Ghent Tests. A statistical difference was instead found between PTs and controls in two tasks of the VOSP battery that mostly involve the dorsal stream. CONCLUSIONS Preterm birth per se (in absence of evident brain lesions) is not sufficient to compromise the development of ventral pathway.
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Affiliation(s)
- Francesca Tinelli
- Department of Developmental Neuroscience, Stella Maris Scientific Institute, Pisa, Italy
| | - Sara Bulgheroni
- Developmental Neurology Division, IRCCS Foundation, C. Besta Neurological Institute, Milan, Italy
| | - Sara Mazzotti
- Department of Developmental Neuroscience, Stella Maris Scientific Institute, Pisa, Italy
| | - Chiara Vago
- Developmental Neurology Division, IRCCS Foundation, C. Besta Neurological Institute, Milan, Italy
| | - Michela Groppo
- NICU, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, University of Milan, Milan, Italy
| | - Rosa Teresa Scaramuzzo
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy; Division of Neonatology, S. Chiara Hospital, University of Pisa, Pisa, Italy
| | - Daria Riva
- Developmental Neurology Division, IRCCS Foundation, C. Besta Neurological Institute, Milan, Italy
| | - Giovanni Cioni
- Department of Developmental Neuroscience, Stella Maris Scientific Institute, Pisa, Italy; Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy.
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Horiuchi-Hirose M, Saito S, Sato C, Aoyama J, Kobayashi T, Sawada K. Cerebral cortical hypoplasia with abnormal morphology of pyramidal neuron in growth-retarded mouse (grt/grt). Acta Neurobiol Exp (Wars) 2014; 74:242-56. [PMID: 25231844 DOI: 10.55782/ane-2014-1990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
The purpose of this study was to quantitatively characterize structural abnormalities of the cerebrum in a growth-retarded mouse (grt/grt) with a tyrosylprotein sulfotransferase 2 gene defect. Three-dimensional computed tomography (CT) images were obtained from fixed brains of male homogenous grt/grt (n=5) and heterozygous grt/+ (n=5) mice at 15 weeks of age, and volumes of representative cerebral regions were calculated on the basis of those images. Following CT measurements, cryosections of the brain were made, and immunohistochemistry for NeuN and SMI-32 was carried out. By CT-based volumetry, region-specific reductions in volumes were marked in the cerebral cortex and white matter, but not in other cerebral regions of grt/grt. When quantitatively evaluating the shape of the cerebral cortex, the frontooccipital length of the cortex was significantly smaller in grt/grt than in grt/+, whereas the cortical width was not altered in grt/grt. On the other hand, both cortical thickness and density of NeuN-immunopositive neurons in three distinctive cortical regions, i.e., the primary motor cortex, barrel field of primary somatosensory cortex and primary visual cortex, were not different between grt/grt and grt/+. By semi-quantitative immunohistochemical analysis, the intensity of SMI-32 immunostaining was significantly weaker in grt/grt than in grt/+ in the three cortical areas examined. SMI-32 staining was reduced, particularly in layer III pyramidal neurons in grt/grt, while it was sustained in multipolar neurons. The present results suggest that cerebral abnormalities in grt/grt mice are characterized by cortical hypoplasia at the frontooccipital axis with immature pyramidal neurons and insufficient development of callosal fibers.
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Affiliation(s)
- Miwa Horiuchi-Hirose
- Department of Nutrition, Faculty of Medical and Health Sciences, Tsukuba International University, Tsuchiura, Ibaraki, Japan,
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Malyshevskaya O, Shiraishi Y, Kimura F, Yamamoto N. Role of electrical activity in horizontal axon growth in the developing cortex: a time-lapse study using optogenetic stimulation. PLoS One 2013; 8:e82954. [PMID: 24376616 PMCID: PMC3871609 DOI: 10.1371/journal.pone.0082954] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Accepted: 10/29/2013] [Indexed: 11/21/2022] Open
Abstract
During development, layer 2/3 neurons in the neocortex extend their axons horizontally, within the same layers, and stop growing at appropriate locations to form branches and synaptic connections. Firing and synaptic activity are thought to be involved in this process, but how neuronal activity regulates axonal growth is not clear. Here, we studied axonal growth of layer 2/3 neurons by exciting cell bodies or axonal processes in organotypic slice cultures of the rat cortex. For neuronal stimulation and morphological observation, plasmids encoding channelrhodopsin-2 (ChR2) and DsRed were coelectroporated into a small number of layer 2/3 cells. Firing activity induced by photostimulation (475 nm) was confirmed by whole-cell patch recording. Axonal growth was observed by time-lapse confocal microscopy, using a different excitation wavelength (560 nm), at 10–20-min intervals for several hours. During the first week in vitro, when spontaneous neuronal activity is low, DsRed- and ChR2-expressing axons grew at a constant rate. When high-frequency photostimulation (4 or 10 Hz) for 1 min was applied to the soma or axon, most axons paused in their growth. In contrast, lower-frequency stimulation did not elicit this pause behavior. Moreover, in the presence of tetrodotoxin, even high-frequency stimulation did not cause axonal growth to pause. These results indicate that increasing firing activity during development suppresses axon growth, suggesting the importance of neuronal activity for the formation of horizontal connections.
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Affiliation(s)
- Olga Malyshevskaya
- Laboratory of Cellular and Molecular Neurobiology, Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka, Japan
| | - Yoshihiro Shiraishi
- Laboratory of Cellular and Molecular Neurobiology, Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka, Japan
| | - Fumitaka Kimura
- Department of Molecular Neuroscience, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Nobuhiko Yamamoto
- Laboratory of Cellular and Molecular Neurobiology, Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka, Japan
- * E-mail:
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Yoneda T, Kameyama K, Esumi K, Daimyo Y, Watanabe M, Hata Y. Developmental and visual input-dependent regulation of the CB1 cannabinoid receptor in the mouse visual cortex. PLoS One 2013; 8:e53082. [PMID: 23308141 PMCID: PMC3540079 DOI: 10.1371/journal.pone.0053082] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Accepted: 11/23/2012] [Indexed: 11/18/2022] Open
Abstract
The mammalian visual system exhibits significant experience-induced plasticity in the early postnatal period. While physiological studies have revealed the contribution of the CB1 cannabinoid receptor (CB1) to developmental plasticity in the primary visual cortex (V1), it remains unknown whether the expression and localization of CB1 is regulated during development or by visual experience. To explore a possible role of the endocannabinoid system in visual cortical plasticity, we examined the expression of CB1 in the visual cortex of mice. We found intense CB1 immunoreactivity in layers II/III and VI. CB1 mainly localized at vesicular GABA transporter-positive inhibitory nerve terminals. The amount of CB1 protein increased throughout development, and the specific laminar pattern of CB1 appeared at P20 and remained until adulthood. Dark rearing from birth to P30 decreased the amount of CB1 protein in V1 and altered the synaptic localization of CB1 in the deep layer. Dark rearing until P50, however, did not influence the expression of CB1. Brief monocular deprivation for 2 days upregulated the localization of CB1 at inhibitory nerve terminals in the deep layer. Taken together, the expression and the localization of CB1 are developmentally regulated, and both parameters are influenced by visual experience.
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Affiliation(s)
- Taisuke Yoneda
- Division of Integrative Bioscience, Institute of Regenerative Medicine and Biofunction, Tottori University Graduate School of Medical Sciences, Yonago, Japan
| | - Katsuro Kameyama
- Division of Integrative Bioscience, Institute of Regenerative Medicine and Biofunction, Tottori University Graduate School of Medical Sciences, Yonago, Japan
| | - Kazusa Esumi
- Division of Integrative Bioscience, Institute of Regenerative Medicine and Biofunction, Tottori University Graduate School of Medical Sciences, Yonago, Japan
| | - Yohei Daimyo
- Division of Neurobiology, School of Life Sciences, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Masahiko Watanabe
- Department of Anatomy, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Yoshio Hata
- Division of Integrative Bioscience, Institute of Regenerative Medicine and Biofunction, Tottori University Graduate School of Medical Sciences, Yonago, Japan
- Division of Neurobiology, School of Life Sciences, Faculty of Medicine, Tottori University, Yonago, Japan
- * E-mail:
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Zueva MV. [Maturation and plasticity of visual system: neurogenesis, synaptogenesis, and myelogenesis. Report 2. Visual cortex and optic radiations]. Vestn Oftalmol 2012; 128:70-74. [PMID: 22994113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Current conceptions of visual cortex synaptogenesis and mielination are reviewed. Human brain undergoes significant morphological and functional changes during prenatal period and the fist year of life that reflexes in height, latency and configuration of visual evoked potentials. The stages of neural modification are genetically predetermined, but it keeps developing under the influence of altered sensory experience. Period of accelerated development of nerve cells and formation of synaptic contacts is followed by global gradual elimination of exuberant neurons and their ineffective contacts, that promotes greater specificity of neuronal tissue and fine functional tuning. The importance of up-to-date functional and morphometric methods of brain maturation and plasticity research such as diffuse tractography is emphasized.
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Lee J, Birtles D, Wattam-Bell J, Atkinson J, Braddick O. Orientation-reversal VEP: comparison of phase and peak latencies in adults and infants. Vision Res 2012; 63:50-7. [PMID: 22575338 DOI: 10.1016/j.visres.2012.04.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 04/18/2012] [Accepted: 04/20/2012] [Indexed: 11/19/2022]
Abstract
The peak latency of pattern-reversal (PR)-VEP has been found to develop rapidly, reaching the adult level around 15 weeks of age. However, the development of orientation-reversal (OR)-VEP, reflecting the specific spatial organization of cortical receptive fields, still remains unknown. OR-VEP was tested in 81 adults at 1-12 reversals/sec (r/s) and 94 infants (age 4-79 weeks) at 2-8r/s. OR data at 4r/s from an additional 123 infants (age 4.0-20.3 weeks) studied previously were also analyzed. In addition to peak transient latencies at 1-4r/s, latency values derived from the gradient of phase against temporal frequency in steady-state recording were also calculated. For both adults and infants, no significant latency differences in the initial positive peaks were found among the low reversal rates. The calculated latency was statistically longer than the transient latency in both groups. While the transient latency asymptoted to adult value of 102 ms at around 50 weeks of age, the calculated latency, unlike that for PR-VEP, showed little variation across the age span. The data suggest a dominant effect of transmission delay on the initial peak in infancy, which reduces with age. However, the overall timing of the cortical response to orientation change remains slower than for pattern reversal in the fully developed visual cortex. Upon reaching maturity, the latencies of the initial positive peak in both pattern and orientation VEPs may arise from the same level of cortical processing in V1, but the overall time course reflected in the steady-state phase continues to show a much more prolonged response to orientation change than the transmission delay seen in the transient VEPs.
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Affiliation(s)
- Jin Lee
- Visual Development Unit, Department of Experimental Psychology, University of Oxford, UK.
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Shaffery JP, Lopez J, Roffwarg HP. Brain-derived neurotrophic factor (BDNF) reverses the effects of rapid eye movement sleep deprivation (REMSD) on developmentally regulated, long-term potentiation (LTP) in visual cortex slices. Neurosci Lett 2012; 513:84-8. [PMID: 22361363 PMCID: PMC3307368 DOI: 10.1016/j.neulet.2012.02.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 01/27/2012] [Accepted: 02/04/2012] [Indexed: 10/28/2022]
Abstract
Work in this laboratory demonstrated a role for rapid eye movement sleep (REMS) in critical period (CP), postnatal days (P) 17-30, synaptic plasticity in visual cortex. Studies in adolescent rats showed that REMS deprivation (REMSD) reinitiates a developmentally regulated form of synaptic plasticity that otherwise is observed only in CP animals. Subsequent work added that REMSD affects inhibitory mechanisms that are thought to be involved in terminating the CP. Neurotrophins are implicated in the synaptic plasticity that underlies CP maturation and also final closure of the CP in visual cortex. Expression of brain-derived neurotrophic factor (BDNF) is dependent upon neuronal activity, and REMSD may block BDNF expression. We propose that REMS contributes to the maturation of visual cortex through regulation of BDNF expression and consequent, downstream increase in cortical inhibitory tone. In this study, osmotic minipumps delivered BDNF into visual cortex on one side of brain. The opposite hemisphere was not implanted and served as an internal control. We tested the hypothesis that BDNF is blocked by REMSD in late-adolescent rats and investigated whether replacing BDNF prevents induction of LTPWM-III by theta burst stimulation (TBS). We also assessed relative inhibitory tone in visual cortex with paired-pulse stimulation (PPS) in animals that were similarly REMSD- and BDNF-infused. After REMSD, both hemispheres were prepared in parallel for in vitro synaptic plasticity studies (LTPWM-III or PPS). In visual cortex of REMSD rats on the side receiving BDNF infusions (8 of 8 animals), TBS consistently failed to induce LTPWM-III. In contrast, LTPWM-III was obtained (5 of 5 animals) in the matched, non-infused hemisphere, as expected in rats of this age. REMSD animals that were unilaterally infused with saline produced LTPWM-III in both hemispheres. PPS studies in another group of REMSD animals that were unilaterally BDNF-infused displayed age-appropriate inhibition of the second response on the BDNF-infused side (5/5), whereas on the non-infused side facilitation was observed (3/3). Intracortical infusion of BDNF in REMSD adolescent rats appears to restore neurochemical processes necessary for termination of the CP for developmentally regulated synaptic plasticity in visual cortex. The results suggest that REMSD blocks BDNF expression and also maturation of inhibitory processes in adolescent visual cortex. These data support REMS' function in brain development.
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Affiliation(s)
- James P Shaffery
- University of Mississippi Medical Center School of Medicine, Department of Psychiatry and Human Behavior, Jackson, MS 39216-4505, USA.
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Abstract
During mammalian development the cerebral metabolic rate correlates qualitatively with synaptogenesis, and both often exhibit bimodal temporal profiles. Despite these non-monotonic dependencies, it is found based on empirical data for different mammals that regional metabolic rate per synapse is approximately conserved from birth to adulthood for a given species (with a slight deviation from this constancy for human visual and temporal cortices during adolescence). A typical synapse uses about glucose molecules per second in primate cerebral cortex, and about five times of that amount in cat and rat visual cortices. A theoretical model for brain metabolic expenditure is used to estimate synaptic signaling and neural spiking activity during development. It is found that synaptic efficacy is generally inversely correlated with average firing rate, and, additionally, synapses consume a bulk of metabolic energy, roughly during most of the developmental process (except human temporal cortex ). Overall, these results suggest a tight regulation of brain electrical and chemical activities during the formation and consolidation of neural connections. This presumably reflects strong energetic constraints on brain development.
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Affiliation(s)
- Jan Karbowski
- Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Warsaw, Poland.
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Merkul'eva NS, Mikhalkin AA, Nikitina NI, Makarov FN. [Development of primary visual cortex connections with the motion processing center: the role of visual environment]. Morfologiia 2011; 140:24-31. [PMID: 22506347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Development of axonal connections between cat primary visual area 17 and visual motion processing center was studied to investigate cortico-cortical connection plasticity in ontogenesis as affected by an experimental modification of visual environment (flickering light stimulation). By using a retrograde axonal labeling by horseradish peroxidase, a distribution of initial neurons in area 17 that send afferent projections to PMLS (posterior medial part of lateral suprasylvian sulcus) was analyzed. Sixteen 5-week-old and 12-14-week-old kittens, than were reared in normal visual environment or were subjected to a flickering light of 15 Hz frequency, were examined. It was shown that session stimulation by flickering light led to an impairment of normal development of regular organization of the connections between these visual areas including the decrease of labeled surface area and labeled initial neuron density in area 17. The data obtained elucidate the structural bases of cortical mechanisms that underlie motion processing disturbances in kittens stimulated by a flickering light.
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Chen X, Chen J, Tian CH, Lin JY, Wang YC. [Study of CPG15 expression in the visual cortex of normal and monocular form deprived development rats]. Zhonghua Yan Ke Za Zhi 2010; 46:978-983. [PMID: 21211292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
OBJECTIVE To explore the expression of CPG15 mRNA and protein the visual cortex of normal and monocular form deprived development rats, To explore the association CPG15 with visual development. METHODS It was an experimental research. one hundred healthy Wistar rats were divided into 10 groups: the time-point for normal group is postnatal 7, 14, 21, 28, 45 days. The time-point for MD group is postnatal 21, 28, 45 days, 10 in every group. MD groups were sutured right eyelid at postnatal 14 days, and to make the model of monocular form deprived. Rats were housed in alike environment. To detect the expression of Neuritin mRNA and immuno-positive neurons protein in the visual cortex of normal and monocular form deprived rats by SYBR green I real-time fluorescent polymerase chain reaction and immunohistochemistry stain methods. RESULT We found that: (1) The expression of normal and MD rats visual cortex CPG15 mRNA and immuno-positive neurons and the IOD of protein, significant deviation existed among different ages with one-factor analysis of variance (P < 0.05), and reached its climax in P28 and MD28. (2) The expression of CPG15 mRNA and immuno-positive neurons and the IOD of protein in MD group obviously lower than the normal group in postnatal 21, 28, 45 days, there was statistically different in that ages (P < 0.05). CONCLUSION The expression of CPG15 mRNA and immuno-positive neurons and the IOD of protein in the development normal and MD rats show that the stage change by development vision. Its expression correlated with visual experience and age factor, and there was a high expression in critical period, and obviously influence by monocular form deprived. So we supposed that CPG15 may affect development and maturation in the visual cortical neuron. It may be the one of molecular basis to participated in visual developmental plasticity.
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Affiliation(s)
- Xia Chen
- Tianjin Eye Hospital, Tianjin 300020, China.
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Merkul'eva NS, Makarov FN. [Ontogenetic specifics of organisation of the cortico-cortical connections of the cat primary visual cortex and lateral suprasylvian area]. Ross Fiziol Zh Im I M Sechenova 2010; 96:217-225. [PMID: 20535992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A quantitative and qualitative analysis of distribution of initial cells that organize the cortico-cortical connections between area 17 and posterior-medial lateral suprasylvian area (PMLS) was carried out in 10 kittens (5- and 12-week old). A horseradish peroxidase labeling technique was used. PMLS area is the highest center of moving visual stimuli information processing. Certain ontogenetic peculiarities of the area 17 initial neurons regular (clustered) organization were revealed. An age-related decreasing of the area 17 initial neurons packing density was shown (from 125.19 +/- 69.75 cells/mm2, in 5-week kittens to 34.67 +/- 17.38 cells/mm2--in 12-week kittens (p = 0.05)). It was shown also that an increasing of striate cortex locus that contained a gross majority of marked neurons occurs from 5-th to 12-th postnatal week. Possible morpho-functional aspects of ontogenetic formation of connections between area 17 and area PMLS clustered structure and its possible relation to development of visual moving stimuli perception are discussed.
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