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Lisboa JRF, Costa O, Pakes GH, Colodete DAE, Gomes FV. Perineuronal net density in schizophrenia: A systematic review of postmortem brain studies. Schizophr Res 2024; 271:100-109. [PMID: 39018984 DOI: 10.1016/j.schres.2024.07.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 05/07/2024] [Accepted: 07/07/2024] [Indexed: 07/19/2024]
Abstract
BACKGROUND The onset of schizophrenia is concurrent with multiple key processes of brain development, such as the maturation of inhibitory networks. Some of these processes are proposed to depend on the development of perineuronal nets (PNNs), a specialized extracellular matrix structure that surrounds preferentially parvalbumin-containing GABAergic interneurons (PVIs). PNNs are fundamental to the postnatal experience-dependent maturation of inhibitory brain circuits. PNN abnormalities have been proposed as a core pathophysiological finding in SCZ, being linked to widespread consequences on circuit disruptions underlying SCZ symptoms. OBJECTIVE Here, we systematically evaluate PNN density in postmortem brain studies of subjects with SCZ. METHODS A systematic search in 3 online databases (PubMed, Embase, and Scopus) and qualitative review analysis of case-control studies reporting on PNN density in the postmortem brain of subjects with SCZ were performed. RESULTS Results consisted of 7 studies that were included in the final analysis. The specific brain regions investigated in the studies varied, with most attention given to the dorsolateral prefrontal cortex (DLPFC; 3 studies) and amygdala (2 studies). Findings were mostly positive for reduced PNN density in SCZ, with 6 of the 7 studies reporting significant reductions and one reporting a tendency towards reduced PNN density. Overall, tissue processing methodologies were heterogeneous. CONCLUSIONS Despite few studies, PNN density was consistently reduced in SCZ across different brain regions. These findings support evidence that implicates deficits in PNN density in the pathophysiology of SCZ. However, more studies, preferably using similar methodological approaches as well as replication of findings, are needed.
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Affiliation(s)
- João Roberto F Lisboa
- Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.
| | - Olga Costa
- Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Gustavo Henrique Pakes
- Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Debora Akemi E Colodete
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Felipe V Gomes
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
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2
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Sethi MK, Maccioni R, Hogan JD, Kawamura T, Repunte-Canonigo V, Chen J, Zaia J, Sanna PP. Comprehensive Glycomic and Proteomic Analysis of Mouse Striatum and Lateral Hypothalamus Following Repeated Exposures to Cocaine or Methamphetamine. Mol Cell Proteomics 2024; 23:100803. [PMID: 38880242 PMCID: PMC11324981 DOI: 10.1016/j.mcpro.2024.100803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 05/23/2024] [Accepted: 06/13/2024] [Indexed: 06/18/2024] Open
Abstract
Substance use disorder is a major concern, with few therapeutic options. Heparan sulfate (HS) and chondroitin sulfate (CS) interact with a plethora of growth factors and their receptors and have profound effects on cellular signaling. Thus, targeting these dynamic interactions might represent a potential novel therapeutic modality. In the present study, we performed mass spectrometry-based glycomic and proteomic analysis to understand the effects of cocaine and methamphetamine (METH) on HS, CS, and the proteome of two brain regions critically involved in drug addiction: the lateral hypothalamus and the striatum. We observed that cocaine and METH significantly alter HS and CS abundances as well as sulfate contents and composition. In particular, repeated METH or cocaine treatments reduced CS 4-O-sulfation and increased CS 6-O-sulfation. Since C4S and C6S exercise differential effects on axon growth, regeneration, and plasticity, these changes likely contribute to drug-induced neural plasticity in these brain regions. Notably, we observed that restoring these alterations by increasing CS 4-0 levels in the lateral hypothalamus by adeno-associated virus delivery of an shRNA to arylsulfatase B (N-acetylgalactosamine-4-sulfatase) ameliorated anxiety and prevented the expression of preference for cocaine in a novelty induced conditioned place preference test during cocaine withdrawal. Finally, proteomics analyses revealed a number of aberrant proteins in METH- and cocaine-treated versus saline-treated mice, including myelin proteolipid protein, calcium/calmodulin-dependent protein kinase type II subunit alpha, synapsin-2, tenascin-R, calnexin, annexin A7, hepatoma-derived growth factor, neurocan, and CSPG5, and oxidative phosphorylation among the top perturbed pathway. Taken together, these data support the role of HS, CS, and associated proteins in stimulants abuse and suggest that manipulation of HSPGs can represent a novel therapeutic strategy.
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Affiliation(s)
- Manveen K Sethi
- Center for Biomedical Mass Spectrometry, Department of Biochemistry and Cell Biology, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Riccardo Maccioni
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, California, USA
| | - John D Hogan
- Bioinformatics Program, Boston University, Boston, Massachusetts, USA
| | - Tomoya Kawamura
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, California, USA
| | - Vez Repunte-Canonigo
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, California, USA
| | - Jihuan Chen
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, California, USA
| | - Joseph Zaia
- Center for Biomedical Mass Spectrometry, Department of Biochemistry and Cell Biology, Boston University School of Medicine, Boston, Massachusetts, USA; Bioinformatics Program, Boston University, Boston, Massachusetts, USA.
| | - Pietro Paolo Sanna
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, California, USA.
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3
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Belliveau C, Théberge S, Netto S, Rahimian R, Fakhfouri G, Hosdey C, Davoli MA, Hendrickson A, Hao K, Giros B, Turecki G, Alonge KM, Mechawar N. Chondroitin sulfate glycan sulfation patterns influence histochemical labeling of perineuronal nets: a comparative study of interregional distribution in human and mouse brain. Glycobiology 2024; 34:cwae049. [PMID: 38995945 PMCID: PMC11257773 DOI: 10.1093/glycob/cwae049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 07/02/2024] [Indexed: 07/14/2024] Open
Abstract
Perineuronal nets (PNNs) are a condensed subtype of extracellular matrix that form a net-like coverings around certain neurons in the brain. PNNs are primarily composed of chondroitin sulfate (CS) proteoglycans from the lectican family that consist of CS-glycosaminoglycan side chains attached to a core protein. CS disaccharides can exist in various isoforms with different sulfation patterns. Literature suggests that CS disaccharide sulfation patterns can influence the function of PNNs as well as their labeling. This study was conducted to characterize such interregional CS disaccharide sulfation pattern differences in adult human (n = 81) and mouse (n = 19) brains. Liquid chromatography tandem mass spectrometry was used to quantify five different CS disaccharide sulfation patterns, which were then compared to immunolabeling of PNNs using Wisteria Floribunda Lectin (WFL) to identify CS-glycosaminoglycans and anti-aggrecan to identify CS proteoglycans. In healthy brains, significant regional and species-specific differences in CS disaccharide sulfation and single versus double-labeling pattern were identified. A secondary analysis to investigate how early-life stress impacts these PNN features discovered that although early-life stress increases WFL+ PNN density, the CS-glycosaminoglycan sulfation code and single versus double PNN-labeling distributions remained unaffected in both species. These results underscore PNN complexity in traditional research, emphasizing the need to consider their heterogeneity in future experiments.
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Affiliation(s)
- Claudia Belliveau
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, 6875 Blvd LaSalle, H4H 1R3, Montreal, QC, Canada
- Integrated Program in Neuroscience, McGill University, 1033 Av des Pins Ouest, H3A 1A1, Montreal, QC, Canada
| | - Stéphanie Théberge
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, 6875 Blvd LaSalle, H4H 1R3, Montreal, QC, Canada
- Integrated Program in Neuroscience, McGill University, 1033 Av des Pins Ouest, H3A 1A1, Montreal, QC, Canada
| | - Stefanie Netto
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, 6875 Blvd LaSalle, H4H 1R3, Montreal, QC, Canada
| | - Reza Rahimian
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, 6875 Blvd LaSalle, H4H 1R3, Montreal, QC, Canada
| | - Gohar Fakhfouri
- Department of Psychiatry, McGill University, 1033 Av des Pins Ouest, H3A 1A1, Montreal, QC, Canada
| | - Clémentine Hosdey
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, 6875 Blvd LaSalle, H4H 1R3, Montreal, QC, Canada
- Integrated Program in Neuroscience, McGill University, 1033 Av des Pins Ouest, H3A 1A1, Montreal, QC, Canada
| | - Maria Antonietta Davoli
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, 6875 Blvd LaSalle, H4H 1R3, Montreal, QC, Canada
| | - Aarun Hendrickson
- Department of Medicinal Chemistry, University of Washington, 1959 NE Pacific Street, Box 357610, Seattle, WA 98195, United States
| | - Kathryn Hao
- Health and Human Sciences, University of Southern California, Zonal Avenue, Biggy St, Los Angeles, CA 90033, United States
| | - Bruno Giros
- Department of Psychiatry, McGill University, 1033 Av des Pins Ouest, H3A 1A1, Montreal, QC, Canada
| | - Gustavo Turecki
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, 6875 Blvd LaSalle, H4H 1R3, Montreal, QC, Canada
- Integrated Program in Neuroscience, McGill University, 1033 Av des Pins Ouest, H3A 1A1, Montreal, QC, Canada
- Department of Psychiatry, McGill University, 1033 Av des Pins Ouest, H3A 1A1, Montreal, QC, Canada
| | - Kimberly M Alonge
- Department of Medicinal Chemistry, University of Washington, 1959 NE Pacific Street, Box 357610, Seattle, WA 98195, United States
| | - Naguib Mechawar
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, 6875 Blvd LaSalle, H4H 1R3, Montreal, QC, Canada
- Integrated Program in Neuroscience, McGill University, 1033 Av des Pins Ouest, H3A 1A1, Montreal, QC, Canada
- Department of Psychiatry, McGill University, 1033 Av des Pins Ouest, H3A 1A1, Montreal, QC, Canada
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4
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Belliveau C, Théberge S, Netto S, Rahimian R, Fakhfouri G, Hosdey C, Davoli MA, Hendrickson A, Hao K, Giros B, Turecki G, Alonge KM, Mechawar N. Chondroitin sulfate glycan sulfation patterns influence histochemical labeling of perineuronal nets: a comparative study of interregional distribution in human and mouse brain. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.09.579711. [PMID: 38948769 PMCID: PMC11212934 DOI: 10.1101/2024.02.09.579711] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
Perineuronal nets (PNNs) are a condensed subtype of extracellular matrix that form a net-like coverings around certain neurons in the brain. PNNs are primarily composed of chondroitin sulfate (CS) proteoglycans from the lectican family that consist of CS-glycosaminoglycan (CS-GAG) side chains attached to a core protein. CS disaccharides can exist in various isoforms with different sulfation patterns. Literature suggests that CS disaccharide sulfation patterns can influence the function of PNNs as well as their labeling. This study was conducted to characterize such interregional CS disaccharide sulfation pattern differences in adult human (N = 81) and mouse (N = 19) brains. Liquid chromatography tandem mass spectrometry was used to quantify five different CS disaccharide sulfation patterns, which were then compared to immunolabeling of PNNs using Wisteria Floribunda Lectin (WFL) to identify CS-GAGs and anti-aggrecan to identify CS proteoglycans. In healthy brains, significant regional and species-specific differences in CS disaccharide sulfation and single versus double-labeling pattern were identified. A secondary analysis to investigate how early-life stress (ELS) impacts these PNN features discovered that although ELS increases WFL+ PNN density, the CS-GAG sulfation code and single versus double PNN-labeling distributions remained unaffected in both species. These results underscore PNN complexity in traditional research, emphasizing the need to consider their heterogeneity in future experiments.
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Affiliation(s)
- Claudia Belliveau
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Montreal, Qc, Canada
- Integrated Program in Neuroscience, McGill University, Montreal, Qc, Canada
| | - Stéphanie Théberge
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Montreal, Qc, Canada
- Integrated Program in Neuroscience, McGill University, Montreal, Qc, Canada
| | - Stefanie Netto
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Montreal, Qc, Canada
| | - Reza Rahimian
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Montreal, Qc, Canada
| | - Gohar Fakhfouri
- Department of Psychiatry, McGill University, Montreal, Qc, Canada
| | - Clémentine Hosdey
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Montreal, Qc, Canada
- Integrated Program in Neuroscience, McGill University, Montreal, Qc, Canada
| | - Maria Antonietta Davoli
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Montreal, Qc, Canada
| | - Aarun Hendrickson
- Department of Medicinal Chemistry, University of Washington, Seattle, USA
| | - Kathryn Hao
- Health and Human Sciences, University of Southern California, Los Angeles, USA
| | - Bruno Giros
- Department of Psychiatry, McGill University, Montreal, Qc, Canada
| | - Gustavo Turecki
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Montreal, Qc, Canada
- Integrated Program in Neuroscience, McGill University, Montreal, Qc, Canada
- Department of Psychiatry, McGill University, Montreal, Qc, Canada
| | - Kimberly M. Alonge
- Department of Medicinal Chemistry, University of Washington, Seattle, USA
| | - Naguib Mechawar
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Montreal, Qc, Canada
- Integrated Program in Neuroscience, McGill University, Montreal, Qc, Canada
- Department of Psychiatry, McGill University, Montreal, Qc, Canada
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5
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Chelini G, Mirzapourdelavar H, Durning P, Baidoe-Ansah D, Sethi MK, O'Donovan SM, Klengel T, Balasco L, Berciu C, Boyer-Boiteau A, McCullumsmith R, Ressler KJ, Zaia J, Bozzi Y, Dityatev A, Berretta S. Focal clusters of peri-synaptic matrix contribute to activity-dependent plasticity and memory in mice. Cell Rep 2024; 43:114112. [PMID: 38676925 PMCID: PMC11251421 DOI: 10.1016/j.celrep.2024.114112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 11/09/2023] [Accepted: 03/28/2024] [Indexed: 04/29/2024] Open
Abstract
Recent findings show that effective integration of novel information in the brain requires coordinated processes of homo- and heterosynaptic plasticity. In this work, we hypothesize that activity-dependent remodeling of the peri-synaptic extracellular matrix (ECM) contributes to these processes. We show that clusters of the peri-synaptic ECM, recognized by CS56 antibody, emerge in response to sensory stimuli, showing temporal and spatial coincidence with dendritic spine plasticity. Using CS56 co-immunoprecipitation of synaptosomal proteins, we identify several molecules involved in Ca2+ signaling, vesicle cycling, and AMPA-receptor exocytosis, thus suggesting a role in long-term potentiation (LTP). Finally, we show that, in the CA1 hippocampal region, the attenuation of CS56 glycoepitopes, through the depletion of versican as one of its main carriers, impairs LTP and object location memory in mice. These findings show that activity-dependent remodeling of the peri-synaptic ECM regulates the induction and consolidation of LTP, contributing to hippocampal-dependent memory.
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Affiliation(s)
- Gabriele Chelini
- Translational Neuroscience Laboratory, McLean Hospital, Belmont, MA 02478, USA; Department of Psychiatry, Harvard Medical School, Boston, MA 02215, USA; Center for Mind/Brain Sciences, University of Trento, Rovereto 38068 Trento, Italy
| | - Hadi Mirzapourdelavar
- Molecular Neuroplasticity Group, German Center for Neurodegenerative Diseases, Magdeburg 39120 Saxony-Anhalt, Germany
| | - Peter Durning
- Translational Neuroscience Laboratory, McLean Hospital, Belmont, MA 02478, USA
| | - David Baidoe-Ansah
- Molecular Neuroplasticity Group, German Center for Neurodegenerative Diseases, Magdeburg 39120 Saxony-Anhalt, Germany
| | - Manveen K Sethi
- Center for Biomedical Mass Spectrometry, Department of Biochemistry and Cell Biology, Boston University School of Medicine, Boston, MA 02118, USA
| | - Sinead M O'Donovan
- Cognitive Disorders Research Laboratory, University of Toledo, Toledo, OH 43606, USA
| | - Torsten Klengel
- Department of Psychiatry, Harvard Medical School, Boston, MA 02215, USA; Translational Molecular Genomics Laboratory, Mclean Hospital, Belmont, MA 02478, USA; Department of Psychiatry, University Medical Center Göttingen, 37075 Göttingen, Germany
| | - Luigi Balasco
- Center for Mind/Brain Sciences, University of Trento, Rovereto 38068 Trento, Italy
| | - Cristina Berciu
- Translational Neuroscience Laboratory, McLean Hospital, Belmont, MA 02478, USA
| | - Anne Boyer-Boiteau
- Translational Neuroscience Laboratory, McLean Hospital, Belmont, MA 02478, USA
| | - Robert McCullumsmith
- Cognitive Disorders Research Laboratory, University of Toledo, Toledo, OH 43606, USA
| | - Kerry J Ressler
- Department of Psychiatry, Harvard Medical School, Boston, MA 02215, USA; Program in Neuroscience, Harvard Medical School, Boston, MA 02215, USA; Neurobiology of Fear Laboratory, McLean Hospital, Belmont, MA 02478, USA
| | - Joseph Zaia
- Center for Biomedical Mass Spectrometry, Department of Biochemistry and Cell Biology, Boston University School of Medicine, Boston, MA 02118, USA; Bioinformatics Program, Boston University, Boston, MA 02215, USA
| | - Yuri Bozzi
- Center for Mind/Brain Sciences, University of Trento, Rovereto 38068 Trento, Italy; CNR Neuroscience Institute Pisa, 56124 Pisa, Italy
| | - Alexander Dityatev
- Molecular Neuroplasticity Group, German Center for Neurodegenerative Diseases, Magdeburg 39120 Saxony-Anhalt, Germany; Medical Faculty, Otto von Guericke University, Magdeburg 39106 Saxony-Anhalt, Germany; Center for Behavioral Brain Sciences, Otto von Guericke University, Magdeburg 39106 Saxony-Anhalt, Germany
| | - Sabina Berretta
- Translational Neuroscience Laboratory, McLean Hospital, Belmont, MA 02478, USA; Department of Psychiatry, Harvard Medical School, Boston, MA 02215, USA; Program in Neuroscience, Harvard Medical School, Boston, MA 02215, USA.
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6
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Francis KL, Zheng HB, Suskind DL, Murphree TA, Phan BA, Quah E, Hendrickson AS, Zhou X, Nuding M, Hudson AS, Guttman M, Morton GJ, Schwartz MW, Alonge KM, Scarlett JM. Characterizing the human intestinal chondroitin sulfate glycosaminoglycan sulfation signature in inflammatory bowel disease. Sci Rep 2024; 14:11839. [PMID: 38782973 PMCID: PMC11116513 DOI: 10.1038/s41598-024-60959-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 04/29/2024] [Indexed: 05/25/2024] Open
Abstract
The intestinal extracellular matrix (ECM) helps maintain appropriate tissue barrier function and regulate host-microbial interactions. Chondroitin sulfate- and dermatan sulfate-glycosaminoglycans (CS/DS-GAGs) are integral components of the intestinal ECM, and alterations in CS/DS-GAGs have been shown to significantly influence biological functions. Although pathologic ECM remodeling is implicated in inflammatory bowel disease (IBD), it is unknown whether changes in the intestinal CS/DS-GAG composition are also linked to IBD in humans. Our aim was to characterize changes in the intestinal ECM CS/DS-GAG composition in intestinal biopsy samples from patients with IBD using mass spectrometry. We characterized intestinal CS/DS-GAGs in 69 pediatric and young adult patients (n = 13 control, n = 32 active IBD, n = 24 IBD in remission) and 6 adult patients. Here, we report that patients with active IBD exhibit a significant decrease in the relative abundance of CS/DS isomers associated with matrix stability (CS-A and DS) compared to controls, while isomers implicated in matrix instability and inflammation (CS-C and CS-E) were significantly increased. This imbalance of intestinal CS/DS isomers was restored among patients in clinical remission. Moreover, the abundance of pro-stabilizing CS/DS isomers negatively correlated with clinical disease activity scores, whereas both pro-inflammatory CS-C and CS-E content positively correlated with disease activity scores. Thus, pediatric patients with active IBD exhibited increased pro-inflammatory and decreased pro-stabilizing CS/DS isomer composition, and future studies are needed to determine whether changes in the CS/DS-GAG composition play a pathogenic role in IBD.
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Affiliation(s)
- Kendra L Francis
- Department of Pediatric Gastroenterology and Hepatology, Seattle Children's Hospital, Seattle, WA, USA
- Department of Medicine, University of Washington Medicine Diabetes Institute, 750 Republican St, Box 358062, Seattle, WA, 98195, USA
| | - Hengqi B Zheng
- Department of Pediatric Gastroenterology and Hepatology, Seattle Children's Hospital, Seattle, WA, USA
| | - David L Suskind
- Department of Pediatric Gastroenterology and Hepatology, Seattle Children's Hospital, Seattle, WA, USA
| | - Taylor A Murphree
- Department of Medicinal Chemistry, University of Washington, Seattle, WA, USA
| | - Bao Anh Phan
- Department of Medicine, University of Washington Medicine Diabetes Institute, 750 Republican St, Box 358062, Seattle, WA, 98195, USA
| | - Emily Quah
- Department of Medicine, University of Washington Medicine Diabetes Institute, 750 Republican St, Box 358062, Seattle, WA, 98195, USA
| | - Aarun S Hendrickson
- Department of Medicine, University of Washington Medicine Diabetes Institute, 750 Republican St, Box 358062, Seattle, WA, 98195, USA
| | - Xisheng Zhou
- Department of Medicinal Chemistry, University of Washington, Seattle, WA, USA
| | - Mason Nuding
- Department of Pediatric Gastroenterology and Hepatology, Seattle Children's Hospital, Seattle, WA, USA
| | - Alexandra S Hudson
- Department of Pediatric Gastroenterology and Hepatology, Seattle Children's Hospital, Seattle, WA, USA
| | - Miklos Guttman
- Department of Medicinal Chemistry, University of Washington, Seattle, WA, USA
| | - Gregory J Morton
- Department of Medicine, University of Washington Medicine Diabetes Institute, 750 Republican St, Box 358062, Seattle, WA, 98195, USA
| | - Michael W Schwartz
- Department of Medicine, University of Washington Medicine Diabetes Institute, 750 Republican St, Box 358062, Seattle, WA, 98195, USA
| | - Kimberly M Alonge
- Department of Medicine, University of Washington Medicine Diabetes Institute, 750 Republican St, Box 358062, Seattle, WA, 98195, USA
- Department of Medicinal Chemistry, University of Washington, Seattle, WA, USA
| | - Jarrad M Scarlett
- Department of Pediatric Gastroenterology and Hepatology, Seattle Children's Hospital, Seattle, WA, USA.
- Department of Medicine, University of Washington Medicine Diabetes Institute, 750 Republican St, Box 358062, Seattle, WA, 98195, USA.
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7
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Mattioni L, Barbieri A, Grigoli A, Balasco L, Bozzi Y, Provenzano G. Alterations of Perineuronal Net Expression and Abnormal Social Behavior and Whisker-dependent Texture Discrimination in Mice Lacking the Autism Candidate Gene Engrailed 2. Neuroscience 2024; 546:63-74. [PMID: 38537894 DOI: 10.1016/j.neuroscience.2024.03.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 02/27/2024] [Accepted: 03/19/2024] [Indexed: 04/06/2024]
Abstract
GABAergic interneurons and perineuronal nets (PNNs) are important regulators of plasticity throughout life and their dysfunction has been implicated in the pathogenesis of several neuropsychiatric conditions, including autism spectrum disorders (ASD). PNNs are condensed portions of the extracellular matrix (ECM) that are crucial for neural development and proper formation of synaptic connections. We previously showed a reduced expression of GABAergic interneuron markers in the hippocampus and somatosensory cortex of adult mice lacking the Engrailed2 gene (En2-/- mice), a mouse model of ASD. Since alterations in PNNs have been proposed as a possible pathogenic mechanism in ASD, we hypothesized that the PNN dysfunction may contribute to the neural and behavioral abnormalities of En2-/- mice. Here, we show an increase in the PNN fluorescence intensity, evaluated by Wisteria floribunda agglutinin, in brain regions involved in social behavior and somatosensory processing. In addition, we found that En2-/- mice exhibit altered texture discrimination through whiskers and display a marked decrease in the preference for social novelty. Our results raise the possibility that altered expression of PNNs, together with defects of GABAergic interneurons, might contribute to the pathogenesis of social and sensory behavioral abnormalities.
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Affiliation(s)
- Lorenzo Mattioni
- Department of Cellular, Computational, and Integrative Biology (CIBIO), University of Trento, via Sommarive 9, 38123 Trento, Italy.
| | - Anna Barbieri
- Department of Cellular, Computational, and Integrative Biology (CIBIO), University of Trento, via Sommarive 9, 38123 Trento, Italy
| | - Andrea Grigoli
- Department of Cellular, Computational, and Integrative Biology (CIBIO), University of Trento, via Sommarive 9, 38123 Trento, Italy
| | - Luigi Balasco
- CIMeC - Center for Mind/Brain Sciences, University of Trento, Piazza della Manifattura 1, 38068 Rovereto, Trento, Italy
| | - Yuri Bozzi
- CIMeC - Center for Mind/Brain Sciences, University of Trento, Piazza della Manifattura 1, 38068 Rovereto, Trento, Italy; CNR Neuroscience Institute, via Moruzzi 1, 56124 Pisa, Italy
| | - Giovanni Provenzano
- Department of Cellular, Computational, and Integrative Biology (CIBIO), University of Trento, via Sommarive 9, 38123 Trento, Italy.
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8
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Palmisano A, Pandit S, Smeralda CL, Demchenko I, Rossi S, Battelli L, Rivolta D, Bhat V, Santarnecchi E. The Pathophysiological Underpinnings of Gamma-Band Alterations in Psychiatric Disorders. Life (Basel) 2024; 14:578. [PMID: 38792599 PMCID: PMC11122172 DOI: 10.3390/life14050578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 04/04/2024] [Accepted: 04/06/2024] [Indexed: 05/26/2024] Open
Abstract
Investigating the biophysiological substrates of psychiatric illnesses is of great interest to our understanding of disorders' etiology, the identification of reliable biomarkers, and potential new therapeutic avenues. Schizophrenia represents a consolidated model of γ alterations arising from the aberrant activity of parvalbumin-positive GABAergic interneurons, whose dysfunction is associated with perineuronal net impairment and neuroinflammation. This model of pathogenesis is supported by molecular, cellular, and functional evidence. Proof for alterations of γ oscillations and their underlying mechanisms has also been reported in bipolar disorder and represents an emerging topic for major depressive disorder. Although evidence from animal models needs to be further elucidated in humans, the pathophysiology of γ-band alteration represents a common denominator for different neuropsychiatric disorders. The purpose of this narrative review is to outline a framework of converging results in psychiatric conditions characterized by γ abnormality, from neurochemical dysfunction to alterations in brain rhythms.
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Affiliation(s)
- Annalisa Palmisano
- Chair of Lifespan Developmental Neuroscience, Faculty of Psychology, TUD Dresden University of Technology, 01069 Dresden, Germany
- Precision Neuroscience and Neuromodulation Program, Gordon Center for Medical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02115, USA (E.S.)
- Department of Education, Psychology, and Communication, University of Bari Aldo Moro, 70121 Bari, Italy;
| | - Siddhartha Pandit
- Precision Neuroscience and Neuromodulation Program, Gordon Center for Medical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02115, USA (E.S.)
| | - Carmelo L. Smeralda
- Precision Neuroscience and Neuromodulation Program, Gordon Center for Medical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02115, USA (E.S.)
- Siena Brain Investigation and Neuromodulation (SI-BIN) Laboratory, Department of Medicine, Surgery and Neuroscience, Neurology and Clinical Neurophysiology Section, University of Siena, 53100 Siena, Italy;
| | - Ilya Demchenko
- Interventional Psychiatry Program, St. Michael’s Hospital—Unity Health Toronto, Toronto, ON M5B 1W8, Canada; (I.D.)
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A1, Canada
| | - Simone Rossi
- Siena Brain Investigation and Neuromodulation (SI-BIN) Laboratory, Department of Medicine, Surgery and Neuroscience, Neurology and Clinical Neurophysiology Section, University of Siena, 53100 Siena, Italy;
| | - Lorella Battelli
- Berenson-Allen Center for Noninvasive Brain Stimulation, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
- Center for Neuroscience and Cognitive Systems@UniTn, Istituto Italiano di Tecnologia, 38068 Rovereto, Italy
| | - Davide Rivolta
- Department of Education, Psychology, and Communication, University of Bari Aldo Moro, 70121 Bari, Italy;
| | - Venkat Bhat
- Interventional Psychiatry Program, St. Michael’s Hospital—Unity Health Toronto, Toronto, ON M5B 1W8, Canada; (I.D.)
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A1, Canada
- Department of Psychiatry, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A1, Canada
| | - Emiliano Santarnecchi
- Precision Neuroscience and Neuromodulation Program, Gordon Center for Medical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02115, USA (E.S.)
- Department of Neurology and Radiology, Massachusetts General Hospital, Boston, MA 02114, USA
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9
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Parise EM, Gyles TM, Godino A, Sial OK, Browne CJ, Parise LF, Torres-Berrío A, Salery M, Durand-de Cuttoli R, Rivera MT, Cardona-Acosta AM, Holt L, Markovic T, van der Zee YY, Lorsch ZS, Cathomas F, Garon JB, Teague C, Issler O, Hamilton PJ, Bolaños-Guzmán CA, Russo SJ, Nestler EJ. Sex-Specific Regulation of Stress Susceptibility by the Astrocytic Gene Htra1. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.12.588724. [PMID: 38659771 PMCID: PMC11042238 DOI: 10.1101/2024.04.12.588724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Major depressive disorder (MDD) is linked to impaired structural and synaptic plasticity in limbic brain regions. Astrocytes, which regulate synapses and are influenced by chronic stress, likely contribute to these changes. We analyzed astrocyte gene profiles in the nucleus accumbens (NAc) of humans with MDD and mice exposed to chronic stress. Htra1 , which encodes an astrocyte-secreted protease targeting the extracellular matrix (ECM), was significantly downregulated in the NAc of males but upregulated in females in both species. Manipulating Htra1 in mouse NAc astrocytes bidirectionally controlled stress susceptibility in a sex-specific manner. Such Htra1 manipulations also altered neuronal signaling and ECM structural integrity in NAc. These findings highlight astroglia and the brain's ECM as key mediators of sex-specific stress vulnerability, offering new approaches for MDD therapies.
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10
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Carceller H, Gramuntell Y, Klimczak P, Nacher J. Perineuronal Nets: Subtle Structures with Large Implications. Neuroscientist 2023; 29:569-590. [PMID: 35872660 DOI: 10.1177/10738584221106346] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Abstract
Perineuronal nets (PNNs) are specialized structures of the extracellular matrix that surround the soma and proximal dendrites of certain neurons in the central nervous system, particularly parvalbumin-expressing interneurons. Their appearance overlaps the maturation of neuronal circuits and the closure of critical periods in different regions of the brain, setting their connectivity and abruptly reducing their plasticity. As a consequence, the digestion of PNNs, as well as the removal or manipulation of their components, leads to a boost in this plasticity and can play a key role in the functional recovery from different insults and in the etiopathology of certain neurologic and psychiatric disorders. Here we review the structure, composition, and distribution of PNNs and their variation throughout the evolutive scale. We also discuss methodological approaches to study these structures. The function of PNNs during neurodevelopment and adulthood is discussed, as well as the influence of intrinsic and extrinsic factors on these specialized regions of the extracellular matrix. Finally, we review current data on alterations in PNNs described in diseases of the central nervous system (CNS), focusing on psychiatric disorders. Together, all the data available point to the PNNs as a promising target to understand the physiology and pathologic conditions of the CNS.
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Affiliation(s)
- Héctor Carceller
- Neurobiology Unit, Institute for Biotechnology and Biomedicine (BIOTECMED), University of Valencia, Spain
- CIBERSAM, Spanish National Network for Research in Mental Health, Instituto de Salud Carlos III, Madrid, Spain
- Biomedical Imaging Unit FISABIO-CIPF, Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunidad Valenciana, Valencia, Spain
| | - Yaiza Gramuntell
- Neurobiology Unit, Institute for Biotechnology and Biomedicine (BIOTECMED), University of Valencia, Spain
| | - Patrycja Klimczak
- Neurobiology Unit, Institute for Biotechnology and Biomedicine (BIOTECMED), University of Valencia, Spain
- CIBERSAM, Spanish National Network for Research in Mental Health, Instituto de Salud Carlos III, Madrid, Spain
| | - Juan Nacher
- Neurobiology Unit, Institute for Biotechnology and Biomedicine (BIOTECMED), University of Valencia, Spain
- CIBERSAM, Spanish National Network for Research in Mental Health, Instituto de Salud Carlos III, Madrid, Spain
- Fundación Investigación Hospital Clínico de Valencia, INCLIVA, Valencia, Spain
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11
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Corsi GI, Gadekar VP, Haukedal H, Doncheva NT, Anthon C, Ambardar S, Palakodeti D, Hyttel P, Freude K, Seemann SE, Gorodkin J. The transcriptomic landscape of neurons carrying PSEN1 mutations reveals changes in extracellular matrix components and non-coding gene expression. Neurobiol Dis 2023; 178:105980. [PMID: 36572121 DOI: 10.1016/j.nbd.2022.105980] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 12/12/2022] [Accepted: 12/22/2022] [Indexed: 12/24/2022] Open
Abstract
Alzheimer's disease (AD) is a progressive and irreversible brain disorder, which can occur either sporadically, due to a complex combination of environmental, genetic, and epigenetic factors, or because of rare genetic variants in specific genes (familial AD, or fAD). A key hallmark of AD is the accumulation of amyloid beta (Aβ) and Tau hyperphosphorylated tangles in the brain, but the underlying pathomechanisms and interdependencies remain poorly understood. Here, we identify and characterise gene expression changes related to two fAD mutations (A79V and L150P) in the Presenilin-1 (PSEN1) gene. We do this by comparing the transcriptomes of glutamatergic forebrain neurons derived from fAD-mutant human induced pluripotent stem cells (hiPSCs) and their individual isogenic controls generated via precision CRISPR/Cas9 genome editing. Our analysis of Poly(A) RNA-seq data detects 1111 differentially expressed coding and non-coding genes significantly altered in fAD. Functional characterisation and pathway analysis of these genes reveal profound expression changes in constituents of the extracellular matrix, important to maintain the morphology, structural integrity, and plasticity of neurons, and in genes involved in calcium homeostasis and mitochondrial oxidative stress. Furthermore, by analysing total RNA-seq data we reveal that 30 out of 31 differentially expressed circular RNA genes are significantly upregulated in the fAD lines, and that these may contribute to the observed protein-coding gene expression changes. The results presented in this study contribute to a better understanding of the cellular mechanisms impacted in AD neurons, ultimately leading to neuronal damage and death.
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Affiliation(s)
- Giulia I Corsi
- Center for non-coding RNA in Technology and Health, University of Copenhagen, Frederiksberg 1871, Denmark; Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg 1870, Denmark
| | - Veerendra P Gadekar
- Center for non-coding RNA in Technology and Health, University of Copenhagen, Frederiksberg 1871, Denmark; Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg 1870, Denmark
| | - Henriette Haukedal
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg 1870, Denmark
| | - Nadezhda T Doncheva
- Center for non-coding RNA in Technology and Health, University of Copenhagen, Frederiksberg 1871, Denmark; Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg 1870, Denmark; Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Copenhagen 2200, Denmark
| | - Christian Anthon
- Center for non-coding RNA in Technology and Health, University of Copenhagen, Frederiksberg 1871, Denmark; Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg 1870, Denmark
| | - Sheetal Ambardar
- Institute for Stem Cell Science and Regenerative Medicine, Bangalore 560065, India; School of Biotechnology, University of Jammu, Jammu and Kashmir 180001, India
| | - Dasaradhi Palakodeti
- Institute for Stem Cell Science and Regenerative Medicine, Bangalore 560065, India
| | - Poul Hyttel
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg 1870, Denmark
| | - Kristine Freude
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg 1870, Denmark
| | - Stefan E Seemann
- Center for non-coding RNA in Technology and Health, University of Copenhagen, Frederiksberg 1871, Denmark; Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg 1870, Denmark
| | - Jan Gorodkin
- Center for non-coding RNA in Technology and Health, University of Copenhagen, Frederiksberg 1871, Denmark; Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg 1870, Denmark.
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12
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Štěpánková K, Mareková D, Kubášová K, Sedláček R, Turnovcová K, Vacková I, Kubinová Š, Makovický P, Petrovičová M, Kwok JCF, Jendelová P, Machová Urdzíková L. 4-Methylumbeliferone Treatment at a Dose of 1.2 g/kg/Day Is Safe for Long-Term Usage in Rats. Int J Mol Sci 2023; 24:3799. [PMID: 36835210 PMCID: PMC9959083 DOI: 10.3390/ijms24043799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/06/2023] [Accepted: 02/09/2023] [Indexed: 02/17/2023] Open
Abstract
4-methylumbelliferone (4MU) has been suggested as a potential therapeutic agent for a wide range of neurological diseases. The current study aimed to evaluate the physiological changes and potential side effects after 10 weeks of 4MU treatment at a dose of 1.2 g/kg/day in healthy rats, and after 2 months of a wash-out period. Our findings revealed downregulation of hyaluronan (HA) and chondroitin sulphate proteoglycans throughout the body, significantly increased bile acids in blood samples in weeks 4 and 7 of the 4MU treatment, as well as increased blood sugars and proteins a few weeks after 4MU administration, and significantly increased interleukins IL10, IL12p70 and IFN gamma after 10 weeks of 4MU treatment. These effects, however, were reversed and no significant difference was observed between control treated and 4MU-treated animals after a 9-week wash-out period.
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Affiliation(s)
- Kateřina Štěpánková
- Institute of Experimental Medicine, Czech Academy of Sciences, 14220 Prague, Czech Republic
- Department of Neuroscience, Second Faculty of Medicine, Charles University, 15006 Prague, Czech Republic
| | - Dana Mareková
- Institute of Experimental Medicine, Czech Academy of Sciences, 14220 Prague, Czech Republic
- Department of Neuroscience, Second Faculty of Medicine, Charles University, 15006 Prague, Czech Republic
| | - Kristýna Kubášová
- Department of Mechanics, Biomechanics and Mechatronics, Faculty of Mechanical Engineering, Czech Technical University in Prague, 16000 Prague, Czech Republic
| | - Radek Sedláček
- Department of Mechanics, Biomechanics and Mechatronics, Faculty of Mechanical Engineering, Czech Technical University in Prague, 16000 Prague, Czech Republic
| | - Karolína Turnovcová
- Institute of Experimental Medicine, Czech Academy of Sciences, 14220 Prague, Czech Republic
| | - Irena Vacková
- Institute of Experimental Medicine, Czech Academy of Sciences, 14220 Prague, Czech Republic
- Institute of Physiology, Czech Academy of Sciences, 14220 Prague, Czech Republic
| | - Šárka Kubinová
- Institute of Experimental Medicine, Czech Academy of Sciences, 14220 Prague, Czech Republic
- Institute of Physics, Czech Academy of Sciences, 18221 Prague, Czech Republic
| | - Pavol Makovický
- Department of Biology, Faculty of Education, J. Seyle University, SK-94501 Komarno, Slovakia
| | - Michaela Petrovičová
- Institute of Experimental Medicine, Czech Academy of Sciences, 14220 Prague, Czech Republic
| | - Jessica C. F. Kwok
- Institute of Experimental Medicine, Czech Academy of Sciences, 14220 Prague, Czech Republic
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK
| | - Pavla Jendelová
- Institute of Experimental Medicine, Czech Academy of Sciences, 14220 Prague, Czech Republic
- Department of Neuroscience, Second Faculty of Medicine, Charles University, 15006 Prague, Czech Republic
| | - Lucia Machová Urdzíková
- Institute of Experimental Medicine, Czech Academy of Sciences, 14220 Prague, Czech Republic
- Department of Neuroscience, Second Faculty of Medicine, Charles University, 15006 Prague, Czech Republic
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13
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Singh AP, Jain VS, Yu JPJ. Diffusion radiomics for subtyping and clustering in autism spectrum disorder: A preclinical study. Magn Reson Imaging 2023; 96:116-125. [PMID: 36496097 PMCID: PMC9815912 DOI: 10.1016/j.mri.2022.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/24/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022]
Abstract
Autism spectrum disorder (ASD) is a highly prevalent, heterogenous neurodevelopmental disorder. Neuroimaging methods such as functional, structural, and diffusion MRI have been used to identify candidate imaging biomarkers for ASD, but current findings remain non-specific and likely arise from the heterogeneity present in ASD. To account for this, efforts to subtype ASD have emerged as a potential strategy for both the study of ASD and advancement of tailored behavioral therapies and therapeutics. Towards these ends, to improve upon current neuroimaging methods, we propose combining biologically sensitive neurite orientation dispersion and density index (NODDI) diffusion MR imaging with radiomics image processing to create a new methodological approach that, we hypothesize, can sensitively and specifically capture neurobiology. We demonstrate this method can sensitively distinguish differences between four genetically distinct rat models of ASD (Fmr1, Pten, Nrxn1, Disc1). Further, we demonstrate diffusion radiomic analyses hold promise for subtyping in ASD as we show unsupervised clustering of NODDI radiomic data generates clusters specific to the underlying genetic differences between the animal models. Taken together, our findings suggest the unique application of radiomic analysis on NODDI diffusion MRI may have the capacity to sensitively and specifically disambiguate the neurobiological heterogeneity present in the ASD population.
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Affiliation(s)
- Ajay P Singh
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53705, USA.; Medical Scientist Training Program, University of Wisconsin School of Medicine and Public Health, Madison, WI 53705, USA; Graduate Program in Cellular and Molecular Biology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Vansh S Jain
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53705, USA
| | - John-Paul J Yu
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53705, USA.; Graduate Program in Cellular and Molecular Biology, University of Wisconsin-Madison, Madison, WI 53706, USA; Neuroscience Training Program, Wisconsin Institutes for Medical Research, University of Wisconsin-Madison, Madison, WI 53705, USA; Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA; Department of Psychiatry, University of Wisconsin School of Medicine and Public Health, Madison, WI 53705, USA.
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14
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HS, an Ancient Molecular Recognition and Information Storage Glycosaminoglycan, Equips HS-Proteoglycans with Diverse Matrix and Cell-Interactive Properties Operative in Tissue Development and Tissue Function in Health and Disease. Int J Mol Sci 2023; 24:ijms24021148. [PMID: 36674659 PMCID: PMC9867265 DOI: 10.3390/ijms24021148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/23/2022] [Accepted: 12/27/2022] [Indexed: 01/11/2023] Open
Abstract
Heparan sulfate is a ubiquitous, variably sulfated interactive glycosaminoglycan that consists of repeating disaccharides of glucuronic acid and glucosamine that are subject to a number of modifications (acetylation, de-acetylation, epimerization, sulfation). Variable heparan sulfate chain lengths and sequences within the heparan sulfate chains provide structural diversity generating interactive oligosaccharide binding motifs with a diverse range of extracellular ligands and cellular receptors providing instructional cues over cellular behaviour and tissue homeostasis through the regulation of essential physiological processes in development, health, and disease. heparan sulfate and heparan sulfate-PGs are integral components of the specialized glycocalyx surrounding cells. Heparan sulfate is the most heterogeneous glycosaminoglycan, in terms of its sequence and biosynthetic modifications making it a difficult molecule to fully characterize, multiple ligands also make an elucidation of heparan sulfate functional properties complicated. Spatio-temporal presentation of heparan sulfate sulfate groups is an important functional determinant in tissue development and in cellular control of wound healing and extracellular remodelling in pathological tissues. The regulatory properties of heparan sulfate are mediated via interactions with chemokines, chemokine receptors, growth factors and morphogens in cell proliferation, differentiation, development, tissue remodelling, wound healing, immune regulation, inflammation, and tumour development. A greater understanding of these HS interactive processes will improve therapeutic procedures and prognoses. Advances in glycosaminoglycan synthesis and sequencing, computational analytical carbohydrate algorithms and advanced software for the evaluation of molecular docking of heparan sulfate with its molecular partners are now available. These advanced analytic techniques and artificial intelligence offer predictive capability in the elucidation of heparan sulfate conformational effects on heparan sulfate-ligand interactions significantly aiding heparan sulfate therapeutics development.
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15
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Mueller-Buehl C, Wegrzyn D, Bauch J, Faissner A. Regulation of the E/I-balance by the neural matrisome. Front Mol Neurosci 2023; 16:1102334. [PMID: 37143468 PMCID: PMC10151766 DOI: 10.3389/fnmol.2023.1102334] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 03/27/2023] [Indexed: 05/06/2023] Open
Abstract
In the mammalian cortex a proper excitatory/inhibitory (E/I) balance is fundamental for cognitive functions. Especially γ-aminobutyric acid (GABA)-releasing interneurons regulate the activity of excitatory projection neurons which form the second main class of neurons in the cortex. During development, the maturation of fast-spiking parvalbumin-expressing interneurons goes along with the formation of net-like structures covering their soma and proximal dendrites. These so-called perineuronal nets (PNNs) represent a specialized form of the extracellular matrix (ECM, also designated as matrisome) that stabilize structural synapses but prevent the formation of new connections. Consequently, PNNs are highly involved in the regulation of the synaptic balance. Previous studies revealed that the formation of perineuronal nets is accompanied by an establishment of mature neuronal circuits and by a closure of critical windows of synaptic plasticity. Furthermore, it has been shown that PNNs differentially impinge the integrity of excitatory and inhibitory synapses. In various neurological and neuropsychiatric disorders alterations of PNNs were described and aroused more attention in the last years. The following review gives an update about the role of PNNs for the maturation of parvalbumin-expressing interneurons and summarizes recent findings about the impact of PNNs in different neurological and neuropsychiatric disorders like schizophrenia or epilepsy. A targeted manipulation of PNNs might provide an interesting new possibility to indirectly modulate the synaptic balance and the E/I ratio in pathological conditions.
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16
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Ruzicka J, Dalecka M, Safrankova K, Peretti D, Jendelova P, Kwok JCF, Fawcett JW. Perineuronal nets affect memory and learning after synapse withdrawal. Transl Psychiatry 2022; 12:480. [PMID: 36379919 PMCID: PMC9666654 DOI: 10.1038/s41398-022-02226-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 09/08/2022] [Accepted: 10/19/2022] [Indexed: 11/16/2022] Open
Abstract
Perineuronal nets (PNNs) enwrap mature neurons, playing a role in the control of plasticity and synapse dynamics. PNNs have been shown to have effects on memory formation, retention and extinction in a variety of animal models. It has been proposed that the cavities in PNNs, which contain synapses, can act as a memory store and that they remain stable after events that cause synaptic withdrawal such as anoxia or hibernation. We examine this idea by monitoring place memory before and after synaptic withdrawal caused by acute hibernation-like state (HLS). Animals lacking hippocampal PNNs due to enzymatic digestion by chondroitinase ABC or knockout of the PNN component aggrecan were compared with wild type controls. HLS-induced synapse withdrawal caused a memory deficit, but not to the level of untreated naïve animals and not worsened by PNN attenuation. After HLS, only animals lacking PNNs showed memory restoration or relearning. Absence of PNNs affected the restoration of excitatory synapses on PNN-bearing neurons. The results support a role for hippocampal PNNs in learning, but not in long-term memory storage for correction of deficits.
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Affiliation(s)
- Jiri Ruzicka
- grid.424967.a0000 0004 0404 6946Institute of Experimental Medicine, CAS, Prague, Czech Republic
| | - Marketa Dalecka
- grid.418095.10000 0001 1015 3316Imaging Methods Core Facility, BIOCEV, CAS, Vestec, Czech Republic
| | - Kristyna Safrankova
- grid.424967.a0000 0004 0404 6946Institute of Experimental Medicine, CAS, Prague, Czech Republic
| | - Diego Peretti
- grid.5335.00000000121885934UK Dementia Research Institute and Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - Pavla Jendelova
- grid.424967.a0000 0004 0404 6946Institute of Experimental Medicine, CAS, Prague, Czech Republic
| | - Jessica C. F. Kwok
- grid.424967.a0000 0004 0404 6946Institute of Experimental Medicine, CAS, Prague, Czech Republic ,grid.9909.90000 0004 1936 8403Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - James W. Fawcett
- grid.424967.a0000 0004 0404 6946Institute of Experimental Medicine, CAS, Prague, Czech Republic ,grid.5335.00000000121885934John van Geest Centre for Brain Repair, University of Cambridge, Cambridge, UK
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17
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Brandenburg C, Griswold AJ, Van Booven DJ, Kilander MBC, Frei JA, Nestor MW, Dykxhoorn DM, Pericak-Vance MA, Blatt GJ. Transcriptomic analysis of isolated and pooled human postmortem cerebellar Purkinje cells in autism spectrum disorders. Front Genet 2022; 13:944837. [PMID: 36437953 PMCID: PMC9683032 DOI: 10.3389/fgene.2022.944837] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Accepted: 08/11/2022] [Indexed: 11/29/2023] Open
Abstract
At present, the neuronal mechanisms underlying the diagnosis of autism spectrum disorder (ASD) have not been established. However, studies from human postmortem ASD brains have consistently revealed disruptions in cerebellar circuitry, specifically reductions in Purkinje cell (PC) number and size. Alterations in cerebellar circuitry would have important implications for information processing within the cerebellum and affect a wide range of human motor and non-motor behaviors. Laser capture microdissection was performed to obtain pure PC populations from a cohort of postmortem control and ASD cases and transcriptional profiles were compared. The 427 differentially expressed genes were enriched for gene ontology biological processes related to developmental organization/connectivity, extracellular matrix organization, calcium ion response, immune function and PC signaling alterations. Given the complexity of PCs and their far-ranging roles in response to sensory stimuli and motor function regulation, understanding transcriptional differences in this subset of cerebellar cells in ASD may inform on convergent pathways that impact neuronal function.
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Affiliation(s)
- Cheryl Brandenburg
- Hussman Institute for Autism, Baltimore, MD, United States
- University of Maryland School of Medicine, Baltimore, MD, United States
| | - Anthony J. Griswold
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, United States
| | - Derek J. Van Booven
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, United States
| | | | | | | | - Derek M. Dykxhoorn
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, United States
| | | | - Gene J. Blatt
- Hussman Institute for Autism, Baltimore, MD, United States
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18
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John U, Patro N, Patro I. Perineuronal nets: Cruise from a honeycomb to the safety nets. Brain Res Bull 2022; 190:179-194. [DOI: 10.1016/j.brainresbull.2022.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 09/17/2022] [Accepted: 10/05/2022] [Indexed: 11/30/2022]
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19
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Catale C, Martini A, Piscitelli RM, Senzasono B, Iacono LL, Mercuri NB, Guatteo E, Carola V. Early-life social stress induces permanent alterations in plasticity and perineuronal nets in the mouse anterior cingulate cortex. Eur J Neurosci 2022; 56:5763-5783. [PMID: 36117291 DOI: 10.1111/ejn.15825] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 08/13/2022] [Accepted: 09/15/2022] [Indexed: 12/29/2022]
Abstract
Child maltreatment disrupts trajectories of brain development, but the underlying pathways are unclear. Stressful stimuli in early life interfere with maturation of local inhibitory circuitry and deposition of perineuronal nets (PNNs), specialized extracellular matrix structures involved in the closure of critical periods of development. Alterations in cortical PNN and parvalbumin (PV) following early-life stress (ELS) have been detected in human and animal studies. Aberrations in the anterior cingulate cortex (ACC) are the most consistent neuroimaging findings in maltreated people, but the molecular mechanisms linking ELS with ACC dysfunctions are unknown. Here, we employed a mouse model of early social threat to test whether ELS experienced in a sensitive period for ACC maturation could induce long-term aberrations of PNN and PV development in the ACC, with consequences on plasticity and ACC-dependent behavior. We found that ELS increased PNN but not PV expression in the ACC of young adult mice. This was associated with reduced frequency of inhibitory postsynaptic currents and long-term potentiation impairments and expression of intense object phobia. Our findings provide information on the long-term effects of ELS on ACC functionality and PNN formation and present evidence for a novel neurobiological pathway underlying the impact of early adversity on the brain.
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Affiliation(s)
- Clarissa Catale
- Division of Experimental Neuroscience, Neurobiology of Behavior Laboratory, IRCCS Santa Lucia Foundation, Rome, Italy
| | - Alessandro Martini
- Division of Experimental Neuroscience, Experimental Neurology Laboratory, IRCCS Santa Lucia Foundation, Rome, Italy
| | - Rosa Maria Piscitelli
- Division of Experimental Neuroscience, Experimental Neurology Laboratory, IRCCS Santa Lucia Foundation, Rome, Italy.,Department of Motor Science and Wellness, Parthenope University of Naples, Naples, Italy
| | | | - Luisa Lo Iacono
- Department of Dynamic and Clinical Psychology, and Health Studies, Sapienza University of Rome, Rome, Italy
| | - Nicola B Mercuri
- Division of Experimental Neuroscience, Experimental Neurology Laboratory, IRCCS Santa Lucia Foundation, Rome, Italy.,Department of Systems Medicine, University of Tor Vergata, Rome, Italy
| | - Ezia Guatteo
- Division of Experimental Neuroscience, Experimental Neurology Laboratory, IRCCS Santa Lucia Foundation, Rome, Italy.,Department of Motor Science and Wellness, Parthenope University of Naples, Naples, Italy
| | - Valeria Carola
- Division of Experimental Neuroscience, Neurobiology of Behavior Laboratory, IRCCS Santa Lucia Foundation, Rome, Italy.,Department of Dynamic and Clinical Psychology, and Health Studies, Sapienza University of Rome, Rome, Italy
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20
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Tewari BP, Chaunsali L, Prim CE, Sontheimer H. A glial perspective on the extracellular matrix and perineuronal net remodeling in the central nervous system. Front Cell Neurosci 2022; 16:1022754. [PMID: 36339816 PMCID: PMC9630365 DOI: 10.3389/fncel.2022.1022754] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 09/23/2022] [Indexed: 11/18/2022] Open
Abstract
A structural scaffold embedding brain cells and vasculature is known as extracellular matrix (ECM). The physical appearance of ECM in the central nervous system (CNS) ranges from a diffused, homogeneous, amorphous, and nearly omnipresent matrix to highly organized distinct morphologies such as basement membranes and perineuronal nets (PNNs). ECM changes its composition and organization during development, adulthood, aging, and in several CNS pathologies. This spatiotemporal dynamic nature of the ECM and PNNs brings a unique versatility to their functions spanning from neurogenesis, cell migration and differentiation, axonal growth, and pathfinding cues, etc., in the developing brain, to stabilizing synapses, neuromodulation, and being an active partner of tetrapartite synapses in the adult brain. The malleability of ECM and PNNs is governed by both intrinsic and extrinsic factors. Glial cells are among the major extrinsic factors that facilitate the remodeling of ECM and PNN, thereby acting as key regulators of diverse functions of ECM and PNN in health and diseases. In this review, we discuss recent advances in our understanding of PNNs and how glial cells are central to ECM and PNN remodeling in normal and pathological states of the CNS.
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Perineuronal Nets in the Dorsomedial Striatum Contribute to Behavioral Dysfunction in Mouse Models of Excessive Repetitive Behavior. BIOLOGICAL PSYCHIATRY GLOBAL OPEN SCIENCE 2022; 2:460-469. [PMID: 36324654 PMCID: PMC9616293 DOI: 10.1016/j.bpsgos.2021.11.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 10/29/2021] [Accepted: 11/03/2021] [Indexed: 11/25/2022] Open
Abstract
Background Excessive repetitive behavior is a debilitating symptom of several neuropsychiatric disorders. Parvalbumin-positive inhibitory interneurons in the dorsal striatum have been linked to repetitive behavior, and a sizable portion of these cells are surrounded by perineuronal nets (PNNs), specialized extracellular matrix structures. Although PNNs have been associated with plasticity and neuropsychiatric disease, no previous studies have investigated their involvement in excessive repetitive behavior. Methods We used histochemistry and confocal imaging to investigate PNNs surrounding parvalbumin-positive cells in the dorsal striatum of 4 mouse models of excessive repetitive behavior (BTBR, Cntnap2, Shank3, prenatal valproate treatment). We then investigated one of these models, the BTBR mouse, in detail, with DiI labeling, in vivo and in vitro recordings, and behavioral analyses. We next degraded PNNs in the dorsomedial striatum (DMS) using the enzyme chondroitinase ABC and assessed dendritic spine density, electrophysiology, and repetitive behavior. Results We found a greater percentage of parvalbumin-positive interneurons with PNNs in the DMS of all 4 mouse models of excessive repetitive behavior compared with control mice. In BTBR mice, we found fewer dendritic spines on medium spiny neurons (targets of parvalbumin-positive interneurons) and differences in neuronal oscillations as well as inhibitory postsynaptic potentials compared with control mice. Reduction of DMS PNNs in BTBR mice altered dendritic spine density and inhibitory responses and normalized repetitive behavior. Conclusions These findings suggest that cellular abnormalities in the DMS are associated with maladaptive repetitive behaviors and that manipulating PNNs can restore normal levels of repetitive behavior while altering DMS dendritic spines and inhibitory signaling.
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22
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Association of preoperative vitamin D deficiency with the risk of postoperative delirium and cognitive dysfunction: A meta-analysis. J Clin Anesth 2022; 79:110681. [DOI: 10.1016/j.jclinane.2022.110681] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/24/2022] [Accepted: 02/06/2022] [Indexed: 12/26/2022]
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23
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Atypical perineuronal nets in the CA2 region interfere with social memory in a mouse model of social dysfunction. Mol Psychiatry 2022; 27:3520-3531. [PMID: 34183768 PMCID: PMC8712624 DOI: 10.1038/s41380-021-01174-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 05/04/2021] [Accepted: 05/12/2021] [Indexed: 12/16/2022]
Abstract
Social memory dysfunction is an especially devastating symptom of many neuropsychiatric disorders, which makes understanding the cellular and molecular processes that contribute to such abnormalities important. Evidence suggests that the hippocampus, particularly the CA2 region, plays an important role in social memory. We sought to identify potential mechanisms of social memory dysfunction in the hippocampus by investigating features of neurons, glia, and the extracellular matrix (ECM) of BTBR mice, an inbred mouse strain with deficient social memory. The CA2 is known to receive inputs from dentate gyrus adult-born granule cells (abGCs), neurons known to participate in social memory, so we examined this cell population and found fewer abGCs, as well as fewer axons from abGCs in the CA2 of BTBR mice compared to controls. We also found that BTBR mice had fewer pyramidal cell dendritic spines, in addition to fewer microglia and astrocytes, in the CA2 compared to controls. Along with diminished neuronal and glial elements, we found atypical perineuronal nets (PNNs), specialized ECM structures that regulate plasticity, in the CA2 of BTBR mice. By diminishing PNNs in the CA2 of BTBR mice to control levels, we observed a partial restoration of social memory. Our findings suggest that the CA2 region of BTBR mice exhibits multiple cellular and extracellular abnormalities and identify atypical PNNs as one mechanism producing social memory dysfunction, although the contribution of reduced abGC afferents, pyramidal cell dendritic spine, and glial cell numbers remains unexplored.
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24
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Reorganization of the Brain Extracellular Matrix in Hippocampal Sclerosis. Int J Mol Sci 2022; 23:ijms23158197. [PMID: 35897768 PMCID: PMC9332352 DOI: 10.3390/ijms23158197] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 07/21/2022] [Accepted: 07/23/2022] [Indexed: 11/17/2022] Open
Abstract
The extracellular matrix (ECM) is an important regulator of excitability and synaptic plasticity, especially in its highly condensed form, the perineuronal nets (PNN). In patients with drug-resistant mesial temporal lobe epilepsy (MTLE), hippocampal sclerosis type 1 (HS1) is the most common histopathological finding. This study aimed to evaluate the ECM profile of HS1 in surgically treated drug-resistant patients with MTLE in correlation to clinical findings. Hippocampal sections were immunohistochemically stained for aggrecan, neurocan, versican, chondroitin-sulfate (CS56), fibronectin, Wisteria floribunda agglutinin (WFA), a nuclear neuronal marker (NeuN), parvalbumin (PV), and glial-fibrillary-acidic-protein (GFAP). In HS1, besides the reduced number of neurons and astrogliosis, we found a significantly changed expression pattern of versican, neurocan, aggrecan, WFA-specific glycosylation, and a reduced number of PNNs. Patients with a lower number of epileptic episodes had a less intense diffuse WFA staining in Cornu Ammonis (CA) fields. Our findings suggest that PNN reduction, changed ECM protein, and glycosylation expression pattern in HS1 might be involved in the pathogenesis and persistence of drug-resistant MTLE by contributing to the increase of CA pyramidal neurons’ excitability. This research corroborates the validity of ECM molecules and their modulators as a potential target for the development of new therapeutic approaches to drug-resistant epilepsy.
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25
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McKenna M, Filteau JR, Butler B, Sluis K, Chungyoun M, Schimek N, Nance E. Organotypic whole hemisphere brain slice models to study the effects of donor age and oxygen-glucose-deprivation on the extracellular properties of cortical and striatal tissue. J Biol Eng 2022; 16:14. [PMID: 35698088 PMCID: PMC9195469 DOI: 10.1186/s13036-022-00293-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 05/21/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The brain extracellular environment is involved in many critical processes associated with neurodevelopment, neural function, and repair following injury. Organization of the extracellular matrix and properties of the extracellular space vary throughout development and across different brain regions, motivating the need for platforms that provide access to multiple brain regions at different stages of development. We demonstrate the utility of organotypic whole hemisphere brain slices as a platform to probe regional and developmental changes in the brain extracellular environment. We also leverage whole hemisphere brain slices to characterize the impact of cerebral ischemia on different regions of brain tissue. RESULTS Whole hemisphere brain slices taken from postnatal (P) day 10 and P17 rats retained viable, metabolically active cells through 14 days in vitro (DIV). Oxygen-glucose-deprivation (OGD), used to model a cerebral ischemic event in vivo, resulted in reduced slice metabolic activity and elevated cell death, regardless of slice age. Slices from P10 and P17 brains showed an oligodendrocyte and microglia-driven proliferative response after OGD exposure, higher than the proliferative response seen in DIV-matched normal control slices. Multiple particle tracking in oxygen-glucose-deprived brain slices revealed that oxygen-glucose-deprivation impacts the extracellular environment of brain tissue differently depending on brain age and brain region. In most instances, the extracellular space was most difficult to navigate immediately following insult, then gradually provided less hindrance to extracellular nanoparticle diffusion as time progressed. However, changes in diffusion were not universal across all brain regions and ages. CONCLUSIONS We demonstrate whole hemisphere brain slices from P10 and P17 rats can be cultured up to two weeks in vitro. These brain slices provide a viable platform for studying both normal physiological processes and injury associated mechanisms with control over brain age and region. Ex vivo OGD impacted cortical and striatal brain tissue differently, aligning with preexisting data generated in in vivo models. These data motivate the need to account for both brain region and age when investigating mechanisms of injury and designing potential therapies for cerebral ischemia.
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Affiliation(s)
- Michael McKenna
- Department of Chemical Engineering, University of Washington, 105 Benson Hall, Box 351750, Seattle, WA, 98195-1750, USA
| | - Jeremy R Filteau
- Department of Chemical Engineering, University of Washington, 105 Benson Hall, Box 351750, Seattle, WA, 98195-1750, USA
| | - Brendan Butler
- Department of Chemical Engineering, University of Washington, 105 Benson Hall, Box 351750, Seattle, WA, 98195-1750, USA
| | - Kenneth Sluis
- Department of Chemical Engineering, University of Washington, 105 Benson Hall, Box 351750, Seattle, WA, 98195-1750, USA
| | - Michael Chungyoun
- Department of Chemical Engineering, University of Washington, 105 Benson Hall, Box 351750, Seattle, WA, 98195-1750, USA
| | - Nels Schimek
- Department of Chemistry, University of Washington, Seattle, WA, USA
| | - Elizabeth Nance
- Department of Chemical Engineering, University of Washington, 105 Benson Hall, Box 351750, Seattle, WA, 98195-1750, USA. .,e-Science Institute, University of Washington, Seattle, WA, USA. .,Department of Bioengineering, University of Washington, Seattle, WA, USA.
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26
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Lipachev N, Melnikova A, Fedosimova S, Arnst N, Kochneva A, Shaikhutdinov N, Dvoeglazova A, Titova A, Mavlikeev M, Aganov A, Osin Y, Kiyasov A, Paveliev M. Postnatal development of the microstructure of cortical GABAergic synapses and perineuronal nets requires sensory input. Neurosci Res 2022; 182:32-40. [PMID: 35710035 DOI: 10.1016/j.neures.2022.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 06/04/2022] [Accepted: 06/09/2022] [Indexed: 11/25/2022]
Abstract
The brain synaptic circuitry is formed as a result of pre-defined genetic programs and sensory experience during postnatal development. Perineuronal nets ensheath synaptic boutons and control several crucial features of the synapse physiology. Formation of the perineuronal net microstructure during the brain development remains largely unstudied. Here we provide a detailed quantitative description of the 3-dimensional geometry of the synapse and the surrounding perineuronal net in the mouse somatosensory cortex layer IV. We compare the morphology of the synapse+perineuronal net complex in the adult brain formed under normal conditions or in the whisker shaving model of somatosensory deprivation. We demonstrate that the sensory deprivation causes flattening of the 3D PNN mesh geometry and reduction of the VGAT-positive cluster volume in presynaptic boutons. These results reveal a mechanism of the sensory input-dependent synapse morphogenesis during the brain development.
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Affiliation(s)
- Nikita Lipachev
- Neuroscience Center, University of Helsinki, Viikinkaari 4, P.O. Box 56, 00790 Helsinki, Finland; Institute of Physics, Kazan Federal University, Kremlyovskaya 16a, 420111 Kazan, Tatarstan, Russia
| | - Anastasia Melnikova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Karl Marx 74, 420012 Kazan, Tatarstan, Russia
| | - Svetlana Fedosimova
- Interdisciplinary Center for Analytic Microscopy, Kazan Federal University, Parizhskoy Kommuny 9, 420021 Kazan, Tatarstan, Russia
| | - Nikita Arnst
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Karl Marx 74, 420012 Kazan, Tatarstan, Russia; Department of Biomedical Sciences, University of Padua, via U. Bassi 58/B, 35131 Padua, Italy
| | - Anastasia Kochneva
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Karl Marx 74, 420012 Kazan, Tatarstan, Russia
| | - Nurislam Shaikhutdinov
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Karl Marx 74, 420012 Kazan, Tatarstan, Russia; Center of Life Sciences, Skolkovo Institute of Science and Technology, Moscow, Russia
| | - Anastasia Dvoeglazova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Karl Marx 74, 420012 Kazan, Tatarstan, Russia
| | - Angelina Titova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Karl Marx 74, 420012 Kazan, Tatarstan, Russia
| | - Mikhail Mavlikeev
- Department of Pathological Anatomy, North-Western State Medical University named after I.I.Mechnikov, Piskarevskiy prospect 47, Build. 23, 195067 Saint-Petersburg, Russia
| | - Albert Aganov
- Institute of Physics, Kazan Federal University, Kremlyovskaya 16a, 420111 Kazan, Tatarstan, Russia
| | - Yuri Osin
- Interdisciplinary Center for Analytic Microscopy, Kazan Federal University, Parizhskoy Kommuny 9, 420021 Kazan, Tatarstan, Russia
| | - Andrei Kiyasov
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Karl Marx 74, 420012 Kazan, Tatarstan, Russia
| | - Mikhail Paveliev
- Neuroscience Center, University of Helsinki, Viikinkaari 4, P.O. Box 56, 00790 Helsinki, Finland.
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27
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Westacott LJ, Wilkinson LS. Complement Dependent Synaptic Reorganisation During Critical Periods of Brain Development and Risk for Psychiatric Disorder. Front Neurosci 2022; 16:840266. [PMID: 35600620 PMCID: PMC9120629 DOI: 10.3389/fnins.2022.840266] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 03/09/2022] [Indexed: 12/12/2022] Open
Abstract
We now know that the immune system plays a major role in the complex processes underlying brain development throughout the lifespan, carrying out a number of important homeostatic functions under physiological conditions in the absence of pathological inflammation or infection. In particular, complement-mediated synaptic pruning during critical periods of early life may play a key role in shaping brain development and subsequent risk for psychopathology, including neurodevelopmental disorders such as schizophrenia and autism spectrum disorders. However, these disorders vary greatly in their onset, disease course, and prevalence amongst sexes suggesting complex interactions between the immune system, sex and the unique developmental trajectories of circuitries underlying different brain functions which are yet to be fully understood. Perturbations of homeostatic neuroimmune interactions during different critical periods in which regional circuits mature may have a plethora of long-term consequences for psychiatric phenotypes, but at present there is a gap in our understanding of how these mechanisms may impact on the structural and functional changes occurring in the brain at different developmental stages. In this article we will consider the latest developments in the field of complement mediated synaptic pruning where our understanding is beginning to move beyond the visual system where this process was first described, to brain areas and developmental periods of potential relevance to psychiatric disorders.
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Affiliation(s)
- Laura J. Westacott
- Neuroscience and Mental Health Innovation Institute, MRC Centre for Neuropsychiatric Genetic and Genomics, School of Medicine, Cardiff University, Cardiff, United Kingdom
- Hodge Centre for Neuropsychiatric Immunology, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Lawrence S. Wilkinson
- Neuroscience and Mental Health Innovation Institute, MRC Centre for Neuropsychiatric Genetic and Genomics, School of Medicine, Cardiff University, Cardiff, United Kingdom
- Hodge Centre for Neuropsychiatric Immunology, School of Medicine, Cardiff University, Cardiff, United Kingdom
- Behavioural Genetics Group, Schools of Psychology and Medicine, Cardiff University, Cardiff, United Kingdom
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28
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Brandenburg C, Blatt GJ. Region-Specific Alterations of Perineuronal Net Expression in Postmortem Autism Brain Tissue. Front Mol Neurosci 2022; 15:838918. [PMID: 35493330 PMCID: PMC9043328 DOI: 10.3389/fnmol.2022.838918] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Accepted: 03/03/2022] [Indexed: 11/13/2022] Open
Abstract
Genetic variance in autism spectrum disorder (ASD) is often associated with mechanisms that broadly fall into the category of neuroplasticity. Parvalbumin positive neurons and their surrounding perineuronal nets (PNNs) are important factors in critical period plasticity and have both been implicated in ASD. PNNs are found in high density within output structures of the cerebellum and basal ganglia, two regions that are densely connected to many other brain areas and have the potential to participate in the diverse array of symptoms present in an ASD diagnosis. The dentate nucleus (DN) and globus pallidus (GP) were therefore assessed for differences in PNN expression in human postmortem ASD brain tissue. While Purkinje cell loss is a consistent neuropathological finding in ASD, in this cohort, the Purkinje cell targets within the DN did not show differences in number of cells with or without a PNN. However, the density of parvalbumin positive neurons with a PNN were significantly reduced in the GP internus and externus of ASD cases, which was not dependent on seizure status. It is unclear whether these alterations manifest during development or are a consequence of activity-dependent mechanisms that lead to altered network dynamics later in life.
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Affiliation(s)
- Cheryl Brandenburg
- Hussman Institute for Autism, Baltimore, MD, United States
- Department of Pharmacology, University of Maryland School of Medicine, Baltimore, MD, United States
- *Correspondence: Cheryl Brandenburg,
| | - Gene J. Blatt
- Hussman Institute for Autism, Baltimore, MD, United States
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29
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Härtig W, Meinicke A, Michalski D, Schob S, Jäger C. Update on Perineuronal Net Staining With Wisteria floribunda Agglutinin (WFA). Front Integr Neurosci 2022; 16:851988. [PMID: 35431825 PMCID: PMC9011100 DOI: 10.3389/fnint.2022.851988] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 02/02/2022] [Indexed: 11/13/2022] Open
Abstract
As chemically specialized forms of the extracellular matrix in the central nervous system, polyanionic perineuronal nets (PNs) contain diverse constituents, including chondroitin sulfate proteoglycans (CSPGs), hyaluronic acid, and tenascins. They are detectable by various histological approaches such as colloidal iron binding and immunohistochemical staining to reveal, for instance, the CSPGs aggrecan, neurocan, phosphacan, and versican. Moreover, biotin, peroxidase, or fluorescein conjugates of the lectins Vicia villosa agglutinin and soybean agglutinin enable the visualization of PNs. At present, the N-acetylgalactosamine-binding Wisteria floribunda agglutinin (WFA) is the most widely applied marker for PNs. Therefore, this article is largely focused on methodological aspects of WFA staining. Notably, fluorescent WFA labeling allows, after its conversion into electron-dense adducts, electron microscopic analyses. Furthermore, the usefulness of WFA conjugates for the oftentimes neglected in vivo and in vitro labeling of PNs is emphasized. Subsequently, we discuss impaired WFA-staining sites after long-lasting experiments in vitro, especially in autoptic brain samples with long postmortem delay and partial enzymatic degradation, while immunolabeling of aggrecan and CSPG link proteins under such conditions has proven more robust. In some hippocampal regions from perfusion-fixed mice, more PNs are aggrecan immunoreactive than WFA positive, whereas the retrosplenial cortex displays many WFA-binding PNs devoid of visible aggrecan immunoreactivity. Additional multiple fluorescence labeling exemplarily revealed in ischemic tissue diminished staining of WFA-binding sites and aquaporin 4 and concomitantly upregulated immunolabeling of neurofilament, light chains, and collagen IV. Finally, we briefly discuss possible future staining approaches based on nanobodies to facilitate novel technologies revealing details of net morphology.
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Affiliation(s)
- Wolfgang Härtig
- Paul Flechsig Institute for Brain Research, University of Leipzig, Leipzig, Germany
- *Correspondence: Wolfgang Härtig,
| | - Anton Meinicke
- Paul Flechsig Institute for Brain Research, University of Leipzig, Leipzig, Germany
| | | | - Stefan Schob
- Department of Neuroradiology, Clinic and Policlinic of Radiology, University Hospital Halle, Halle (Saale), Germany
| | - Carsten Jäger
- Paul Flechsig Institute for Brain Research, University of Leipzig, Leipzig, Germany
- Department of Neurophysics, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
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30
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Dankovich TM, Rizzoli SO. Extracellular Matrix Recycling as a Novel Plasticity Mechanism With a Potential Role in Disease. Front Cell Neurosci 2022; 16:854897. [PMID: 35431813 PMCID: PMC9008140 DOI: 10.3389/fncel.2022.854897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 02/09/2022] [Indexed: 11/13/2022] Open
Abstract
The extracellular matrix (ECM) stabilizes neural circuits and synapses in the healthy brain, while also retaining the ability to be remodeled, to allow synapses to be plastic. A well-described mechanism for ECM remodeling is through the regulated secretion of proteolytic enzymes at the synapse, together with the synthesis of new ECM molecules. The importance of this process is evidenced by the large number of brain disorders that are associated with a dysregulation of ECM-cleaving protease activity. While most of the brain ECM molecules are indeed stable for remarkable time periods, evidence in other cell types, as cancer cells, suggests that at least a proportion of the ECM molecules may be endocytosed regularly, and could even be recycled back to the ECM. In this review, we discuss the involvement of such a mechanism in the brain, under physiological activity conditions and in relation to synapse and brain disease.
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Affiliation(s)
- Tal M. Dankovich
- Institute of Neuro- and Sensory Physiology, University Medical Center Göttingen, Göttingen, Germany
- International Max Planck Research School for Neurosciences, Göttingen, Germany
- *Correspondence: Tal M. Dankovich,
| | - Silvio O. Rizzoli
- Institute of Neuro- and Sensory Physiology, University Medical Center Göttingen, Göttingen, Germany
- Biostructural Imaging of Neurodegeneration (BIN) Center & Multiscale Bioimaging Excellence Center, Göttingen, Germany
- Silvio O. Rizzoli,
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31
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Li H, Sheng Z, Khan S, Zhang R, Liu Y, Zhang Y, Yong VW, Xue M. Matrix Metalloproteinase-9 as an Important Contributor to the Pathophysiology of Depression. Front Neurol 2022; 13:861843. [PMID: 35370878 PMCID: PMC8971905 DOI: 10.3389/fneur.2022.861843] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 02/21/2022] [Indexed: 11/13/2022] Open
Abstract
Matrix metalloproteinases (MMPs) are physiologically expressed in the central nervous system in neurons, astrocytes and microglia, and their aberrant elevation contributes to a number of diseases. Amongst the MMP members, MMP−9 has generated considerable attention because of its possible involvement in inflammatory responses, blood-brain barrier permeability, the regulation of perineuronal nets, demyelination, and synaptic long-term potentiation. Emerging evidence indicate an association between MMP−9 and the syndrome of depression. This review provides an updated and comprehensive summary of the probable roles of MMP−9 in depression with an emphasis on the mechanisms and potential of MMP−9 as a biomarker of depression.
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Affiliation(s)
- Hongmin Li
- The Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- The Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, Zhengzhou, China
| | - Zhaofu Sheng
- The Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- The Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, Zhengzhou, China
| | - Suliman Khan
- The Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- The Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, Zhengzhou, China
| | - Ruiyi Zhang
- The Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- The Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, Zhengzhou, China
| | - Yang Liu
- The Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- The Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, Zhengzhou, China
| | - Yan Zhang
- The Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- The Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, Zhengzhou, China
| | - V. Wee Yong
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
- Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada
- *Correspondence: V. Wee Yong
| | - Mengzhou Xue
- The Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- The Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, Zhengzhou, China
- Mengzhou Xue
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32
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Dankovich TM, Rizzoli SO. The Synaptic Extracellular Matrix: Long-Lived, Stable, and Still Remarkably Dynamic. Front Synaptic Neurosci 2022; 14:854956. [PMID: 35350469 PMCID: PMC8957932 DOI: 10.3389/fnsyn.2022.854956] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 02/16/2022] [Indexed: 01/09/2023] Open
Abstract
In the adult brain, synapses are tightly enwrapped by lattices of the extracellular matrix that consist of extremely long-lived molecules. These lattices are deemed to stabilize synapses, restrict the reorganization of their transmission machinery, and prevent them from undergoing structural or morphological changes. At the same time, they are expected to retain some degree of flexibility to permit occasional events of synaptic plasticity. The recent understanding that structural changes to synapses are significantly more frequent than previously assumed (occurring even on a timescale of minutes) has called for a mechanism that allows continual and energy-efficient remodeling of the extracellular matrix (ECM) at synapses. Here, we review recent evidence for such a process based on the constitutive recycling of synaptic ECM molecules. We discuss the key characteristics of this mechanism, focusing on its roles in mediating synaptic transmission and plasticity, and speculate on additional potential functions in neuronal signaling.
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Affiliation(s)
- Tal M. Dankovich
- University Medical Center Göttingen, Institute for Neuro- and Sensory Physiology, Göttingen, Germany
- International Max Planck Research School for Neuroscience, Göttingen, Germany
- *Correspondence: Tal M. Dankovich Silvio O. Rizzoli
| | - Silvio O. Rizzoli
- University Medical Center Göttingen, Institute for Neuro- and Sensory Physiology, Göttingen, Germany
- Biostructural Imaging of Neurodegeneration (BIN) Center & Multiscale Bioimaging Excellence Center, Göttingen, Germany
- *Correspondence: Tal M. Dankovich Silvio O. Rizzoli
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Abstract
Brain disease remains a significant health, social, and economic burden with a high failure rate of translation of therapeutics to the clinic. Nanotherapeutics have represented a promising area of technology investment to improve drug bioavailability and delivery to the brain, with several successes for nanotherapeutic use for central nervous system disease that are currently in the clinic. However, renewed and continued research on the treatment of neurological disorders is critically needed. We explore the challenges of drug delivery to the brain and the ways in which nanotherapeutics can overcome these challenges. We provide a summary and overview of general design principles that can be applied to nanotherapeutics for uptake and penetration in the brain. We next highlight remaining questions that limit the translational potential of nanotherapeutics for application in the clinic. Lastly, we provide recommendations for ongoing preclinical research to improve the overall success of nanotherapeutics against neurological disease. Expected final online publication date for the Annual Review of Chemical and Biomolecular Engineering, Volume 13 is October 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Andrea Joseph
- Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, Pennsylvania, USA;
| | - Elizabeth Nance
- Department of Chemical Engineering, University of Washington, Seattle, Washington, USA;
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Dubisova J, Burianova JS, Svobodova L, Makovicky P, Martinez-Varea N, Cimpean A, Fawcett JW, Kwok JCF, Kubinova S. Oral treatment of 4-methylumbelliferone reduced perineuronal nets and improved recognition memory in mice. Brain Res Bull 2022; 181:144-156. [PMID: 35066096 PMCID: PMC8867078 DOI: 10.1016/j.brainresbull.2022.01.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 01/15/2022] [Accepted: 01/19/2022] [Indexed: 12/30/2022]
Abstract
Hyaluronan (HA) is a core constituent of perineuronal nets (PNNs) that surround subpopulations of neurones. The PNNs control synaptic stabilization in both the developing and adult central nervous system, and disruption of PNNs has shown to reactivate neuroplasticity. We investigated the possibility of memory prolongation by attenuating PNN formation using 4-methylumbelliferone (4-MU), an inhibitor of HA synthesis. Adult C57BL/6 mice were fed with chow containing 5% (w/w) 4-MU for 6 months, at a dose ~6.7 mg/g/day. The oral administration of 4-MU reduced the glycosaminoglycan level in the brain to 72% and the spinal cord to 50% when compared to the controls. Spontaneous object recognition test (SOR) performed at 2, 3, 6 and 7 months showed a significant increase in SOR score in the 6-months treatment group 24 h after object presentation. The effect however did not persist in the washout group (1-month post treatment). Immunohistochemistry confirmed a reduction of PNNs, with shorter and less arborization of aggrecan staining around dendrites in hippocampus after 6 months of 4-MU treatment. Histopathological examination revealed mild atrophy in articular cartilage but it did not affect the motor performance as demonstrated in rotarod test. In conclusion, systemic oral administration of 4-MU for 6 months reduced PNN formation around neurons and enhanced memory retention in mice. However, the memory enhancement was not sustained despite the reduction of PNNs, possibly due to the lack of memory enhancement training during the washout period. Our results suggest that 4-MU treatment might offer a strategy for PNN modulation in memory enhancement. Removal of perineuronal nets (PNNs) reactivates neuroplasticity. Oral administration of 4-methylumbelliferone (4-MU) reduces PNNs. PNN reduction leads to enhancement in recognition memory in mice. The memory effect is not sustained likely due to a lack of memory training.
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Affiliation(s)
- Jana Dubisova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; 2nd Medical Faculty, Charles University, V Úvalu 84, 150 06 Prague, Czech Republic
| | - Jana Svobodova Burianova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic
| | - Lucie Svobodova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic
| | - Pavol Makovicky
- Department of Biology, Faculty of Education, J. Selye University, Slovakia
| | - Noelia Martinez-Varea
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; 2nd Medical Faculty, Charles University, V Úvalu 84, 150 06 Prague, Czech Republic
| | - Anda Cimpean
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; 2nd Medical Faculty, Charles University, V Úvalu 84, 150 06 Prague, Czech Republic
| | - James W Fawcett
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; John Van Geest Centre for Brain Repair, University of Cambridge, Cambridge, United Kingdom
| | - Jessica C F Kwok
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, United Kingdom.
| | - Sarka Kubinova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic; Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic.
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Crapser JD, Arreola MA, Tsourmas KI, Green KN. Microglia as hackers of the matrix: sculpting synapses and the extracellular space. Cell Mol Immunol 2021; 18:2472-2488. [PMID: 34413489 PMCID: PMC8546068 DOI: 10.1038/s41423-021-00751-3] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 07/26/2021] [Indexed: 02/08/2023] Open
Abstract
Microglia shape the synaptic environment in health and disease, but synapses do not exist in a vacuum. Instead, pre- and postsynaptic terminals are surrounded by extracellular matrix (ECM), which together with glia comprise the four elements of the contemporary tetrapartite synapse model. While research in this area is still just beginning, accumulating evidence points toward a novel role for microglia in regulating the ECM during normal brain homeostasis, and such processes may, in turn, become dysfunctional in disease. As it relates to synapses, microglia are reported to modify the perisynaptic matrix, which is the diffuse matrix that surrounds dendritic and axonal terminals, as well as perineuronal nets (PNNs), specialized reticular formations of compact ECM that enwrap neuronal subsets and stabilize proximal synapses. The interconnected relationship between synapses and the ECM in which they are embedded suggests that alterations in one structure necessarily affect the dynamics of the other, and microglia may need to sculpt the matrix to modify the synapses within. Here, we provide an overview of the microglial regulation of synapses, perisynaptic matrix, and PNNs, propose candidate mechanisms by which these structures may be modified, and present the implications of such modifications in normal brain homeostasis and in disease.
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Affiliation(s)
- Joshua D. Crapser
- grid.266093.80000 0001 0668 7243Department of Neurobiology and Behavior, University of California, Irvine, CA USA
| | - Miguel A. Arreola
- grid.266093.80000 0001 0668 7243Department of Neurobiology and Behavior, University of California, Irvine, CA USA
| | - Kate I. Tsourmas
- grid.266093.80000 0001 0668 7243Department of Neurobiology and Behavior, University of California, Irvine, CA USA
| | - Kim N. Green
- grid.266093.80000 0001 0668 7243Department of Neurobiology and Behavior, University of California, Irvine, CA USA
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Sultana R, Brooks CB, Shrestha A, Ogundele OM, Lee CC. Perineuronal Nets in the Prefrontal Cortex of a Schizophrenia Mouse Model: Assessment of Neuroanatomical, Electrophysiological, and Behavioral Contributions. Int J Mol Sci 2021; 22:11140. [PMID: 34681799 PMCID: PMC8538055 DOI: 10.3390/ijms222011140] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 10/06/2021] [Accepted: 10/11/2021] [Indexed: 01/01/2023] Open
Abstract
Schizophrenia is a neurodevelopmental disorder whose etiopathogenesis includes changes in cellular as well as extracellular structures. Perineuronal nets (PNNs) associated with parvalbumin-positive interneurons (PVs) in the prefrontal cortex (PFC) are dysregulated in schizophrenia. However, the postnatal development of these structures along with their associated neurons in the PFC is unexplored, as is their effects on behavior and neural activity. Therefore, in this study, we employed a DISC1 (Disruption in Schizophrenia) mutation mouse model of schizophrenia to assess these developmental changes and tested whether enzymatic digestion of PNNs in the PFC affected schizophrenia-like behaviors and neural activity. Developmentally, we found that the normal formation of PNNs, PVs, and colocalization of these two in the PFC, peaked around PND 22 (postnatal day 22). However, in DISC1, mutation animals from PND 0 to PND 60, both PNNs and PVs were significantly reduced. After enzymatic digestion of PNNs with chondroitinase in adult animals, the behavioral pattern of control animals mimicked that of DISC1 mutation animals, exhibiting reduced sociability, novelty and increased ultrasonic vocalizations, while there was very little change in other behaviors, such as working memory (Y-maze task involving medial temporal lobe) or depression-like behavior (tail-suspension test involving processing via the hypothalamic pituitary adrenal (HPA) axis). Moreover, following chondroitinase treatment, electrophysiological recordings from the PFC exhibited a reduced proportion of spontaneous, high-frequency firing neurons, and an increased proportion of irregularly firing neurons, with increased spike count and reduced inter-spike intervals in control animals. These results support the proposition that the aberrant development of PNNs and PVs affects normal neural operations in the PFC and contributes to the emergence of some of the behavioral phenotypes observed in the DISC1 mutation model of schizophrenia.
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Affiliation(s)
- Razia Sultana
- Department of Comparative Biomedical Sciences, LSU School of Veterinary Medicine, Baton Rouge, LA 70803, USA; (C.B.B.); (A.S.); (O.M.O.)
| | | | | | | | - Charles Chulsoo Lee
- Department of Comparative Biomedical Sciences, LSU School of Veterinary Medicine, Baton Rouge, LA 70803, USA; (C.B.B.); (A.S.); (O.M.O.)
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37
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Bicker F, Nardi L, Maier J, Vasic V, Schmeisser MJ. Criss-crossing autism spectrum disorder and adult neurogenesis. J Neurochem 2021; 159:452-478. [PMID: 34478569 DOI: 10.1111/jnc.15501] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 08/05/2021] [Accepted: 08/28/2021] [Indexed: 12/19/2022]
Abstract
Autism spectrum disorder (ASD) comprises a group of multifactorial neurodevelopmental disorders primarily characterized by deficits in social interaction and repetitive behavior. Although the onset is typically in early childhood, ASD poses a lifelong challenge for both patients and caretakers. Adult neurogenesis (AN) is the process by which new functional neurons are created from neural stem cells existing in the post-natal brain. The entire event is based on a sequence of cellular processes, such as proliferation, specification of cell fate, maturation, and ultimately, synaptic integration into the existing neural circuits. Hence, AN is implicated in structural and functional brain plasticity throughout life. Accumulating evidence shows that impaired AN may underlie some of the abnormal behavioral phenotypes seen in ASD. In this review, we approach the interconnections between the molecular pathways related to AN and ASD. We also discuss existing therapeutic approaches targeting such pathways both in preclinical and clinical studies. A deeper understanding of how ASD and AN reciprocally affect one another could reveal important converging pathways leading to the emergence of psychiatric disorders.
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Affiliation(s)
- Frank Bicker
- Institute for Microscopic Anatomy and Neurobiology, University Medical Center of the Johannes Gutenberg-University, Mainz, Germany
| | - Leonardo Nardi
- Institute for Microscopic Anatomy and Neurobiology, University Medical Center of the Johannes Gutenberg-University, Mainz, Germany
| | - Jannik Maier
- Institute for Microscopic Anatomy and Neurobiology, University Medical Center of the Johannes Gutenberg-University, Mainz, Germany
| | - Verica Vasic
- Institute for Microscopic Anatomy and Neurobiology, University Medical Center of the Johannes Gutenberg-University, Mainz, Germany
| | - Michael J Schmeisser
- Institute for Microscopic Anatomy and Neurobiology, University Medical Center of the Johannes Gutenberg-University, Mainz, Germany.,Focus Program Translational Neurosciences (FTN), University Medical Center of the Johannes Gutenberg-University, Mainz, Germany
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Perineuronal Nets and Metal Cation Concentrations in the Microenvironments of Fast-Spiking, Parvalbumin-Expressing GABAergic Interneurons: Relevance to Neurodevelopment and Neurodevelopmental Disorders. Biomolecules 2021; 11:biom11081235. [PMID: 34439901 PMCID: PMC8391699 DOI: 10.3390/biom11081235] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/11/2021] [Accepted: 08/14/2021] [Indexed: 12/31/2022] Open
Abstract
Because of their abilities to catalyze generation of toxic free radical species, free concentrations of the redox reactive metals iron and copper are highly regulated. Importantly, desired neurobiological effects of these redox reactive metal cations occur within very narrow ranges of their local concentrations. For example, synaptic release of free copper acts locally to modulate NMDA receptor-mediated neurotransmission. Moreover, within the developing brain, iron is critical to hippocampal maturation and the differentiation of parvalbumin-expressing neurons, whose soma and dendrites are surrounded by perineuronal nets (PNNs). The PNNs are a specialized component of brain extracellular matrix, whose polyanionic character supports the fast-spiking electrophysiological properties of these parvalbumin-expressing GABAergic interneurons. In addition to binding cations and creation of the Donnan equilibrium that support the fast-spiking properties of this subset of interneurons, the complex architecture of PNNs also binds metal cations, which may serve a protective function against oxidative damage, especially of these fast-spiking neurons. Data suggest that pathological disturbance of the population of fast-spiking, parvalbumin-expressing GABAergic inhibitory interneurons occur in at least some clinical presentations, which leads to disruption of the synchronous oscillatory output of assemblies of pyramidal neurons. Increased expression of the GluN2A NMDA receptor subunit on parvalbumin-expressing interneurons is linked to functional maturation of both these neurons and the perineuronal nets that surround them. Disruption of GluN2A expression shows increased susceptibility to oxidative stress, reflected in redox dysregulation and delayed maturation of PNNs. This may be especially relevant to neurodevelopmental disorders, including autism spectrum disorder. Conceivably, binding of metal redox reactive cations by the perineuronal net helps to maintain safe local concentrations, and also serves as a reservoir buffering against second-to-second fluctuations in their concentrations outside of a narrow physiological range.
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Li ZZ, Han WJ, Sun ZC, Chen Y, Sun JY, Cai GH, Liu WN, Wang TZ, Xie YD, Mao HH, Wang F, Ma SB, Wang FD, Xie RG, Wu SX, Luo C. Extracellular matrix protein laminin β1 regulates pain sensitivity and anxiodepression-like behaviors in mice. J Clin Invest 2021; 131:e146323. [PMID: 34156983 DOI: 10.1172/jci146323] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 06/16/2021] [Indexed: 01/11/2023] Open
Abstract
Patients with neuropathic pain often experience comorbid psychiatric disorders. Cellular plasticity in the anterior cingulate cortex (ACC) is assumed to be a critical interface for pain perception and emotion. However, substantial efforts have thus far been focused on the intracellular mechanisms of plasticity rather than the extracellular alterations that might trigger and facilitate intracellular changes. Laminin, a key element of the extracellular matrix (ECM), consists of one α-, one β-, and one γ-chain and is implicated in several pathophysiological processes. Here, we showed in mice that laminin β1 (LAMB1) in the ACC was significantly downregulated upon peripheral neuropathy. Knockdown of LAMB1 in the ACC exacerbated pain sensitivity and induced anxiety and depression. Mechanistic analysis revealed that loss of LAMB1 caused actin dysregulation via interaction with integrin β1 and the subsequent Src-dependent RhoA/LIMK/cofilin pathway, leading to increased presynaptic transmitter release probability and abnormal postsynaptic spine remodeling, which in turn orchestrated the structural and functional plasticity of pyramidal neurons and eventually resulted in pain hypersensitivity and anxiodepression. This study sheds new light on the functional capability of ECM LAMB1 in modulating pain plasticity and identifies a mechanism that conveys extracellular alterations to intracellular plasticity. Moreover, we identified cingulate LAMB1/integrin β1 signaling as a promising therapeutic target for the treatment of neuropathic pain and associated anxiodepression.
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Affiliation(s)
- Zhen-Zhen Li
- Department of Neurobiology, School of Basic Medicine.,Department of Neurosurgery, Xijing Hospital, and
| | - Wen-Juan Han
- Department of Neurobiology, School of Basic Medicine
| | - Zhi-Chuan Sun
- Department of Neurobiology, School of Basic Medicine
| | - Yun Chen
- The Second Regiment, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Jun-Yi Sun
- The Second Regiment, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Guo-Hong Cai
- Department of Neurobiology, School of Basic Medicine
| | - Wan-Neng Liu
- Department of Neurobiology, School of Basic Medicine.,College of Life Sciences, Northwest University, Xi'an, China
| | - Tao-Zhi Wang
- Department of Neurobiology, School of Basic Medicine.,Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, China
| | - Yang-Dan Xie
- The Second Regiment, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Hong-Hui Mao
- Department of Neurobiology, School of Basic Medicine
| | - Fei Wang
- Department of Neurobiology, School of Basic Medicine.,Medical Experiment Center, Shaanxi University of Chinese Medicine, China
| | - Sui-Bin Ma
- Department of Neurobiology, School of Basic Medicine
| | - Fu-Dong Wang
- Department of Neurobiology, School of Basic Medicine
| | - Rou-Gang Xie
- Department of Neurobiology, School of Basic Medicine
| | - Sheng-Xi Wu
- Department of Neurobiology, School of Basic Medicine
| | - Ceng Luo
- Department of Neurobiology, School of Basic Medicine
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40
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McKenna M, Shackelford D, Ferreira Pontes H, Ball B, Nance E. Multiple Particle Tracking Detects Changes in Brain Extracellular Matrix and Predicts Neurodevelopmental Age. ACS NANO 2021; 15:8559-8573. [PMID: 33969999 PMCID: PMC8281364 DOI: 10.1021/acsnano.1c00394] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Brain extracellular matrix (ECM) structure mediates many aspects of neural development and function. Probing structural changes in brain ECM could thus provide insights into mechanisms of neurodevelopment, the loss of neural function in response to injury, and the detrimental effects of pathological aging and neurological disease. We demonstrate the ability to probe changes in brain ECM microstructure using multiple particle tracking (MPT). We performed MPT of colloidally stable polystyrene nanoparticles in organotypic rat brain slices collected from rats aged 14-70 days old. Our analysis revealed an inverse relationship between nanoparticle diffusive ability in the brain extracellular space and age. Additionally, the distribution of effective ECM pore sizes in the cortex shifted to smaller pores throughout development. We used the raw data and features extracted from nanoparticle trajectories to train a boosted decision tree capable of predicting chronological age with high accuracy. Collectively, this work demonstrates the utility of combining MPT with machine learning for measuring changes in brain ECM structure and predicting associated complex features such as chronological age. This will enable further understanding of the roles brain ECM play in development and aging and the specific mechanisms through which injuries cause aberrant neuronal function. Additionally, this approach has the potential to develop machine learning models capable of detecting the presence of injury or indicating the extent of injury based on changes in the brain microenvironment microstructure.
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Affiliation(s)
- Michael McKenna
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - David Shackelford
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Hugo Ferreira Pontes
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Brendan Ball
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Elizabeth Nance
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
- Department of Radiology, University of Washington, Seattle, Washington 98195, United States
- Center on Human Development and Disability, University of Washington, Seattle, Washington 98195, United States
- eScience Institute, University of Washington, Seattle, Washington 98195, United States
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Wingert JC, Sorg BA. Impact of Perineuronal Nets on Electrophysiology of Parvalbumin Interneurons, Principal Neurons, and Brain Oscillations: A Review. Front Synaptic Neurosci 2021; 13:673210. [PMID: 34040511 PMCID: PMC8141737 DOI: 10.3389/fnsyn.2021.673210] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 04/14/2021] [Indexed: 12/11/2022] Open
Abstract
Perineuronal nets (PNNs) are specialized extracellular matrix structures that surround specific neurons in the brain and spinal cord, appear during critical periods of development, and restrict plasticity during adulthood. Removal of PNNs can reinstate juvenile-like plasticity or, in cases of PNN removal during early developmental stages, PNN removal extends the critical plasticity period. PNNs surround mainly parvalbumin (PV)-containing, fast-spiking GABAergic interneurons in several brain regions. These inhibitory interneurons profoundly inhibit the network of surrounding neurons via their elaborate contacts with local pyramidal neurons, and they are key contributors to gamma oscillations generated across several brain regions. Among other functions, these gamma oscillations regulate plasticity associated with learning, decision making, attention, cognitive flexibility, and working memory. The detailed mechanisms by which PNN removal increases plasticity are only beginning to be understood. Here, we review the impact of PNN removal on several electrophysiological features of their underlying PV interneurons and nearby pyramidal neurons, including changes in intrinsic and synaptic membrane properties, brain oscillations, and how these changes may alter the integration of memory-related information. Additionally, we review how PNN removal affects plasticity-associated phenomena such as long-term potentiation (LTP), long-term depression (LTD), and paired-pulse ratio (PPR). The results are discussed in the context of the role of PV interneurons in circuit function and how PNN removal alters this function.
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Affiliation(s)
- Jereme C Wingert
- Program in Neuroscience, Robert S. Dow Neurobiology Laboratories, Legacy Research Institute, Portland, OR, United States
| | - Barbara A Sorg
- Program in Neuroscience, Robert S. Dow Neurobiology Laboratories, Legacy Research Institute, Portland, OR, United States
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42
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Fitzgerald E, Boardman JP, Drake AJ. Early life stress and LPS interact to modify the mouse cortical transcriptome in the neonatal period. Brain Behav Immun Health 2021; 13:100219. [PMID: 34589738 PMCID: PMC8474587 DOI: 10.1016/j.bbih.2021.100219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 02/08/2021] [Accepted: 02/09/2021] [Indexed: 02/04/2023] Open
Abstract
INTRODUCTION Preterm birth (PTB) is closely associated with atypical cerebral cortical development and cognitive impairment. Early exposure to extrauterine life often results in atypical environmental and biological experiences that co-occur, including early life stress (ELS) and systemic inflammation. Understanding how these experiences interact to shape cortical development is an essential prerequisite to developing therapeutic interventions that will work in the complex postnatal environment of the preterm infant. Here, we studied the effects of a murine model of infection and ELS on the neonatal cortex transcriptome. METHODS We used a mouse model of infection (1 mg/kg LPS at postnatal day (P)3) +/- ELS (modified maternal separation; MMS on days P4-P6) at timepoints with neurodevelopmental relevance to PTB. We used 4 groups: control, LPS, MMS and LPS + MMS. Cortices were dissected at P6 for 3'RNA sequencing. RESULTS LPS exposure resulted in reduced weight gain and increased expression of inflammation-associated genes in the brain. More genes were differentially expressed following LPS (15) and MMS (29) than with LPS + MMS (8). There was significant overlap between the LPS and MMS datasets, particularly amongst upregulated genes, and when comparing LPS and MMS datasets with LPS + MMS. Gene Ontology terms related to the extracellular matrix and cytokine response were enriched following MMS, but not following LPS or LPS + MMS. 26 Reactome pathways were enriched in the LPS group, none of which were enriched in the LPS + MMS group. Finally, a rank-rank hypergeometric overlap test showed similarities, particularly in upregulated genes, in the LPS and MMS conditions, indicating shared mechanisms. CONCLUSION LPS and MMS interact to modify the cortical transcriptome in the neonatal period. This has important implications for understanding the neural basis of atypical cortical development associated with early exposure to extrauterine life.
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Affiliation(s)
- Eamon Fitzgerald
- University/British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, The Queen’s Medical Research Institute, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - James P. Boardman
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen’s Medical Research Institute, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
- Centre for Clinical Brain Sciences, University of Edinburgh, Chancellor’s Building, 49 Little France Crescent, Edinburgh, EH16 4SB, UK
| | - Amanda J. Drake
- University/British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, The Queen’s Medical Research Institute, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
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Postnatal Fluoxetine Treatment Alters Perineuronal Net Formation and Maintenance in the Hippocampus. eNeuro 2021; 8:ENEURO.0424-20.2021. [PMID: 33622703 PMCID: PMC8046023 DOI: 10.1523/eneuro.0424-20.2021] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 01/27/2021] [Accepted: 01/28/2021] [Indexed: 01/20/2023] Open
Abstract
Elevation of serotonin via postnatal fluoxetine (PNFlx) treatment during critical temporal windows is hypothesized to perturb the development of limbic circuits thus establishing a substratum for persistent disruption of mood-related behavior. We examined the impact of PNFlx treatment on the formation and maintenance of perineuronal nets (PNNs), extracellular matrix (ECM) structures that deposit primarily around inhibitory interneurons, and mark the closure of critical period plasticity. PNFlx treatment evoked a significant decline in PNN number, with a robust reduction in PNNs deposited around parvalbumin (PV) interneurons, within the CA1 and CA3 hippocampal subfields at postnatal day (P)21 in Sprague Dawley rat pups. While the reduction in CA1 subfield PNN number was still observed in adulthood, we observed no change in colocalization of PV-positive interneurons with PNNs in the hippocampi of adult PNFlx animals. PNFlx treatment did not alter hippocampal PV, calretinin (CalR), or Reelin-positive neuron numbers in PNFlx animals at P21 or in adulthood. We did observe a small, but significant increase in somatostatin (SST)-positive interneurons in the DG subfield of PNFlx-treated animals in adulthood. This was accompanied by altered GABA-A receptor subunit composition, increased dendritic complexity of apical dendrites of CA1 pyramidal neurons, and enhanced neuronal activation revealed by increased c-Fos-positive cell numbers within hippocampi of PNFlx-treated animals in adulthood. These results indicate that PNFlx treatment alters the formation of PNNs within the hippocampus, raising the possibility of a disruption of excitation-inhibition (E/I) balance within this key limbic brain region.
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44
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Xia D, Li L, Yang B, Zhou Q. Altered Relationship Between Parvalbumin and Perineuronal Nets in an Autism Model. Front Mol Neurosci 2021; 14:597812. [PMID: 33912009 PMCID: PMC8072465 DOI: 10.3389/fnmol.2021.597812] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 03/16/2021] [Indexed: 12/26/2022] Open
Abstract
Altered function or presence of inhibitory neurons is documented in autism spectrum disorders (ASD), but the mechanism underlying this alternation is poorly understood. One major subtype of inhibitory neurons altered is the parvalbumin (PV)-containing neurons with reduced density and intensity in ASD patients and model mice. A subpopulation of PV+ neurons expresses perineuronal nets (PNN). To better understand whether the relationship between PV and PNN is altered in ASD, we measured quantitatively the intensities of PV and PNN in single PV+ neurons in the prelimbic prefrontal cortex (PrL-PFC) of a valproic acid (VPA) model of ASD at different ages. We found a decreased PV intensity but increased PNN intensity in VPA mice. The relationship between PV and PNN intensities is altered in VPA mice, likely due to an "abnormal" subpopulation of neurons with an altered PV-PNN relationship. Furthermore, reducing PNN level using in vivo injection of chondroitinase ABC corrects the PV expression in adult VPA mice. We suggest that the interaction between PV and PNN is disrupted in PV+ neurons in VPA mice which may contribute to the pathology in ASD.
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Affiliation(s)
- Dan Xia
- Key Laboratory of Chemical Genome, State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, China.,Center for Child Care and Mental Health, Shenzhen Children's Hospital, Shenzhen, China
| | - Li Li
- State Key Laboratory of Organ Failure Research, Department of Biostatistics, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Binrang Yang
- Center for Child Care and Mental Health, Shenzhen Children's Hospital, Shenzhen, China
| | - Qiang Zhou
- Key Laboratory of Chemical Genome, State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, China
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Sinha P, Cree SL, Miller AL, Pearson JF, Kennedy MA. Transcriptional analysis of sodium valproate in a serotonergic cell line reveals gene regulation through both HDAC inhibition-dependent and independent mechanisms. THE PHARMACOGENOMICS JOURNAL 2021; 21:359-375. [PMID: 33649518 DOI: 10.1038/s41397-021-00215-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/17/2021] [Accepted: 01/27/2021] [Indexed: 11/09/2022]
Abstract
Sodium valproate (VPA) is a histone deacetylase (HDAC) inhibitor, widely prescribed in the treatment of bipolar disorder, and yet the precise modes of therapeutic action for this drug are not fully understood. After exposure of the rat serotonergic cell line RN46A to VPA, RNA-sequencing (RNA-Seq) analysis showed widespread changes in gene expression. Analysis by four bioinformatic pipelines revealed as many as 230 genes were significantly upregulated and 72 genes were significantly downregulated. A subset of 23 differentially expressed genes was selected for validation using the nCounter® platform, and of these we obtained robust validation for ADAM23, LSP1, MAOB, MMP13, PAK3, SERPINB2, SNAP91, WNT6, and ZCCHC12. We investigated the effect of lithium on this subset and found four genes, CDKN1C, LSP1, SERPINB2, and WNT6 co-regulated by lithium and VPA. We also explored the effects of other HDAC inhibitors and the VPA analogue valpromide on the subset of 23 selected genes. Expression of eight of these genes, CDKN1C, MAOB, MMP13, NGFR, SHANK3, VGF, WNT6 and ZCCHC12, was modified by HDAC inhibition, whereas others did not appear to respond to several HDAC inhibitors tested. These results suggest VPA may regulate genes through both HDAC-dependent and independent mechanisms. Understanding the broader gene regulatory effects of VPA in this serotonergic cell model should provide insights into how this drug works and whether other HDAC inhibitor compounds may have similar gene regulatory effects, as well as highlighting molecular processes that may underlie regulation of mood.
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Affiliation(s)
- Priyanka Sinha
- Department of Pathology and Biomedical Science, University of Otago, Christchurch, New Zealand.,Carney Centre for Pharmacogenomics, University of Otago, Christchurch, New Zealand
| | - Simone L Cree
- Department of Pathology and Biomedical Science, University of Otago, Christchurch, New Zealand.,Carney Centre for Pharmacogenomics, University of Otago, Christchurch, New Zealand
| | - Allison L Miller
- Department of Pathology and Biomedical Science, University of Otago, Christchurch, New Zealand.,Carney Centre for Pharmacogenomics, University of Otago, Christchurch, New Zealand
| | - John F Pearson
- Department of Pathology and Biomedical Science, University of Otago, Christchurch, New Zealand.,Carney Centre for Pharmacogenomics, University of Otago, Christchurch, New Zealand.,Biostatistics and Computational Biology Unit, University of Otago, Christchurch, New Zealand
| | - Martin A Kennedy
- Department of Pathology and Biomedical Science, University of Otago, Christchurch, New Zealand. .,Carney Centre for Pharmacogenomics, University of Otago, Christchurch, New Zealand.
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An Extracellular Perspective on CNS Maturation: Perineuronal Nets and the Control of Plasticity. Int J Mol Sci 2021; 22:ijms22052434. [PMID: 33670945 PMCID: PMC7957817 DOI: 10.3390/ijms22052434] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/24/2021] [Accepted: 02/24/2021] [Indexed: 02/07/2023] Open
Abstract
During restricted time windows of postnatal life, called critical periods, neural circuits are highly plastic and are shaped by environmental stimuli. In several mammalian brain areas, from the cerebral cortex to the hippocampus and amygdala, the closure of the critical period is dependent on the formation of perineuronal nets. Perineuronal nets are a condensed form of an extracellular matrix, which surrounds the soma and proximal dendrites of subsets of neurons, enwrapping synaptic terminals. Experimentally disrupting perineuronal nets in adult animals induces the reactivation of critical period plasticity, pointing to a role of the perineuronal net as a molecular brake on plasticity as the critical period closes. Interestingly, in the adult brain, the expression of perineuronal nets is remarkably dynamic, changing its plasticity-associated conditions, including memory processes. In this review, we aimed to address how perineuronal nets contribute to the maturation of brain circuits and the regulation of adult brain plasticity and memory processes in physiological and pathological conditions.
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Diurnal changes in perineuronal nets and parvalbumin neurons in the rat medial prefrontal cortex. Brain Struct Funct 2021; 226:1135-1153. [PMID: 33585984 DOI: 10.1007/s00429-021-02229-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 01/21/2021] [Indexed: 01/08/2023]
Abstract
Perineuronal nets (PNNs) surrounding fast-spiking, parvalbumin (PV) interneurons provide excitatory:inhibitory balance, which is impaired in several disorders associated with altered diurnal rhythms, yet few studies have examined diurnal rhythms of PNNs or PV cells. We measured the intensity and number of PV cells and PNNs labeled with Wisteria floribunda agglutinin (WFA) and also the oxidative stress marker 8-oxo-deoxyguanosine (8-oxo-dG) in rat prelimbic medial prefrontal cortex (mPFC) at Zeitgeber times (ZT) ZT0 (lights-on, inactive phase), ZT6 (mid-inactive phase), ZT12 (lights-off, active phase), and ZT18 (mid-active phase). Relative to ZT0, the intensities of PNN and PV labeling were increased in the dark (active) phase compared with the light (inactive) phase. The intensity of 8-oxo-dG was decreased from ZT0 at all times (ZT6,12,18). We also measured GAD 65/67 and vGLUT1 puncta apposed to PV cells with and without PNNs. There were more excitatory puncta on PV cells with PNNs at ZT18 vs. ZT6, but no changes in PV cells without PNNs and no changes in inhibitory puncta. Whole-cell slice recordings in fast-spiking (PV) cells with PNNs showed an increased ratio of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor:N-methyl-D-aspartate receptor (AMPA: NMDA) at ZT18 vs. ZT6. The number of PV cells and PV/PNN cells containing orthodenticle homeobox 2 (OTX2), which maintains PNNs, showed a strong trend toward an increase from ZT6 to ZT18. Diurnal fluctuations in PNNs and PV cells are expected to alter cortical excitatory:inhibitory balance and provide new insights into treatments for diseases impacted by disturbances in sleep and circadian rhythms.
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Duncan BW, Murphy KE, Maness PF. Molecular Mechanisms of L1 and NCAM Adhesion Molecules in Synaptic Pruning, Plasticity, and Stabilization. Front Cell Dev Biol 2021; 9:625340. [PMID: 33585481 PMCID: PMC7876315 DOI: 10.3389/fcell.2021.625340] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 01/04/2021] [Indexed: 11/13/2022] Open
Abstract
Mammalian brain circuits are wired by dynamic formation and remodeling during development to produce a balance of excitatory and inhibitory synapses. Synaptic regulation is mediated by a complex network of proteins including immunoglobulin (Ig)- class cell adhesion molecules (CAMs), structural and signal-transducing components at the pre- and post-synaptic membranes, and the extracellular protein matrix. This review explores the current understanding of developmental synapse regulation mediated by L1 and NCAM family CAMs. Excitatory and inhibitory synapses undergo formation and remodeling through neuronal CAMs and receptor-ligand interactions. These responses result in pruning inactive dendritic spines and perisomatic contacts, or synaptic strengthening during critical periods of plasticity. Ankyrins engage neural adhesion molecules of the L1 family (L1-CAMs) to promote synaptic stability. Chondroitin sulfates, hyaluronic acid, tenascin-R, and linker proteins comprising the perineuronal net interact with L1-CAMs and NCAM, stabilizing synaptic contacts and limiting plasticity as critical periods close. Understanding neuronal adhesion signaling and synaptic targeting provides insight into normal development as well as synaptic connectivity disorders including autism, schizophrenia, and intellectual disability.
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Affiliation(s)
- Bryce W Duncan
- Department of Biochemistry and Biophysics, Neuroscience Research Center, Carolina Institute for Developmental Disabilities, University of North Carolina School of Medicine, Chapel Hill, NC, United States
| | - Kelsey E Murphy
- Department of Biochemistry and Biophysics, Neuroscience Research Center, Carolina Institute for Developmental Disabilities, University of North Carolina School of Medicine, Chapel Hill, NC, United States
| | - Patricia F Maness
- Department of Biochemistry and Biophysics, Neuroscience Research Center, Carolina Institute for Developmental Disabilities, University of North Carolina School of Medicine, Chapel Hill, NC, United States
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Bertocchi I, Mele P, Ferrero G, Oberto A, Carulli D, Eva C. NPY-Y1 receptor signaling controls spatial learning and perineuronal net expression. Neuropharmacology 2020; 184:108425. [PMID: 33285203 DOI: 10.1016/j.neuropharm.2020.108425] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 11/24/2020] [Accepted: 12/01/2020] [Indexed: 12/17/2022]
Abstract
Perineuronal nets (PNNs) are extracellular matrix structures that form around some types of neurons at the end of critical periods, limiting neuronal plasticity. In the adult brain, PNNs play a crucial role in the regulation of learning and cognitive processes. Neuropeptide Y (NPY) is involved in the regulation of many physiological functions, including learning and memory abilities, via activation of Y1 receptors (Y1Rs). Here we demonstrated that the conditional depletion of the gene encoding the Y1R for NPY in adult forebrain excitatory neurons (Npy1rrfb mutant mice), induces a significant slowdown in spatial learning, which is associated with a robust intensification of PNN expression and an increase in the number of c-Fos expressing cells in the cornus ammonis 1 (CA1) of the dorsal hippocampus. Importantly, the enzymatic digestion of PNNs in CA1 normalizes c-Fos activity and completely rescues learning abilities of Npy1rrfb mice. These data highlight a previously unknown functional link between NPY-Y1R transmission and PNNs, which may play a role in the control of dorsal hippocampal excitability and related cognitive functions.
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Affiliation(s)
- Ilaria Bertocchi
- Neuroscience Institute of the Cavalieri-Ottolenghi Foundation, 10043, Orbassano, Turin, Italy; Department of Neuroscience, University of Turin, 10126, Turin, Italy; Neuroscience Institute of Turin (NIT), Italy
| | - Paolo Mele
- Neuroscience Institute of the Cavalieri-Ottolenghi Foundation, 10043, Orbassano, Turin, Italy; Department of Neuroscience, University of Turin, 10126, Turin, Italy
| | - Giuliano Ferrero
- Neuroscience Institute of the Cavalieri-Ottolenghi Foundation, 10043, Orbassano, Turin, Italy
| | - Alessandra Oberto
- Neuroscience Institute of the Cavalieri-Ottolenghi Foundation, 10043, Orbassano, Turin, Italy; Department of Neuroscience, University of Turin, 10126, Turin, Italy; Neuroscience Institute of Turin (NIT), Italy
| | - Daniela Carulli
- Neuroscience Institute of the Cavalieri-Ottolenghi Foundation, 10043, Orbassano, Turin, Italy; Department of Neuroscience, University of Turin, 10126, Turin, Italy; Neuroscience Institute of Turin (NIT), Italy; Netherlands Institute for Neuroscience, 1105 BA, Amsterdam, Netherlands
| | - Carola Eva
- Neuroscience Institute of the Cavalieri-Ottolenghi Foundation, 10043, Orbassano, Turin, Italy; Department of Neuroscience, University of Turin, 10126, Turin, Italy; Neuroscience Institute of Turin (NIT), Italy.
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Aberrant glycosylation in schizophrenia: a review of 25 years of post-mortem brain studies. Mol Psychiatry 2020; 25:3198-3207. [PMID: 32404945 PMCID: PMC8081047 DOI: 10.1038/s41380-020-0761-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 04/18/2020] [Accepted: 04/24/2020] [Indexed: 02/06/2023]
Abstract
Glycosylation, the enzymatic attachment of carbohydrates to proteins and lipids, regulates nearly all cellular processes and is critical in the development and function of the nervous system. Axon pathfinding, neurite outgrowth, synaptogenesis, neurotransmission, and many other neuronal processes are regulated by glycans. Over the past 25 years, studies analyzing post-mortem brain samples have found evidence of aberrant glycosylation in individuals with schizophrenia. Proteins involved in both excitatory and inhibitory neurotransmission display altered glycans in the disease state, including AMPA and kainate receptor subunits, glutamate transporters EAAT1 and EAAT2, and the GABAA receptor. Polysialylated NCAM (PSA-NCAM) and perineuronal nets, highly glycosylated molecules critical for axonal migration and synaptic stabilization, are both downregulated in multiple brain regions of individuals with schizophrenia. In addition, enzymes spanning several pathways of glycan synthesis show differential expression in brains of individuals with schizophrenia. These changes may be due to genetic predisposition, environmental perturbations, medication use, or a combination of these factors. However, the recent association of several enzymes of glycosylation with schizophrenia by genome-wide association studies underscores the importance of glycosylation in this disease. Understanding how glycosylation is dysregulated in the brain will further our understanding of how this pathway contributes to the development and pathophysiology of schizophrenia.
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