1
|
Dhossche D, de Billy C, Laurent-Levinson C, Le Normand MT, Recasens C, Robel L, Philippe A. Early-onset catatonia associated with SHANK3 mutations: looking at the autism spectrum through the prism of psychomotor phenomena. Front Psychiatry 2023; 14:1186555. [PMID: 37810596 PMCID: PMC10557257 DOI: 10.3389/fpsyt.2023.1186555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 08/04/2023] [Indexed: 10/10/2023] Open
Abstract
Background Individuals with Phelan-McDermid syndrome (PMS) present with a wide range of diagnoses: autism spectrum disorder, intellectual disability, or schizophrenia. Differences in the genetic background could explain these different neurodevelopmental trajectories. However, a more parsimonious hypothesis is to consider that they may be the same phenotypic entity. Catatonic disturbances occasionally reported from adolescence onwards in PMS prompts exploration of the hypothesis that this clinical entity may be an early-onset form of catatonia. The largest cohort of children with childhood catatonia was studied by the Wernicke-Kleist-Leonhard school (WKL school), which regards catatonia as a collection of qualitative abnormalities of psychomotricity that predominantly affecting involuntary motricity (reactive and expressive). The aim of this study was to investigate the presence of psychomotor signs in three young adults carrying a mutation or intragenic deletion of the SHANK3 gene through the prism of the WKL school conception of catatonia. Methods This study was designed as an exploratory case study. Current and childhood psychomotor phenomena were investigated through semi-structured interviews with the parents, direct interaction with the participants, and the study of documents reporting observations of the participants at school or by other healthcare professionals. Results The findings show catatonic manifestations from childhood that evolved into a chronic form, with possible phases of sub-acute exacerbations starting from adolescence. Conclusion The presence of catatonic symptoms from childhood associated with autistic traits leads us to consider that this singular entity fundamentally related to SHANK3 mutations could be a form of early-onset catatonia. Further case studies are needed to confirm our observations.
Collapse
Affiliation(s)
- Dirk Dhossche
- Department of Adolescent Psychiatry, Inland Northwest Behavioral Health, Spokane, WA, United States
| | - Clément de Billy
- CEMNIS – Noninvasive Neuromodulation Center, University Hospital Strasbourg, Strasbourg, France
| | - Claudine Laurent-Levinson
- Faculté de Médecine Sorbonne Université, Groupe de Recherche Clinique no. 15 – Troubles Psychiatriques et Développement (PSYDEV), Paris, France
- Centre de Référence des Maladies Rares à Expression Psychiatrique, Département de Psychiatrie de l’enfant et l’adolescent, Hôpital Pitié-Salpétrière, Paris, France
| | - Marie T. Le Normand
- Institut de l’Audition, Institut Pasteur, Paris, France
- Laboratoire de Psychopathologie et Processus de Santé, Université de Paris Cité, Paris, France
| | - Christophe Recasens
- Service universitaire de Psychiatrie de l’Enfant et de l’Adolescent, Centre hospitalier Intercommunal de Créteil, Créteil, France
| | - Laurence Robel
- Unité de Psychopathologie de l’Enfant et de l’Adolescent, GHU Paris, Psychiatrie et Neurosciences, Hôpital Sainte Anne, Paris, France
| | - Anne Philippe
- Université Paris Cité, Paris, France
- INSERM U1163 Institut Imagine, Paris, France
| |
Collapse
|
2
|
Wang X, Tang R, Wei Z, Zhan Y, Lu J, Li Z. The enteric nervous system deficits in autism spectrum disorder. Front Neurosci 2023; 17:1101071. [PMID: 37694110 PMCID: PMC10484716 DOI: 10.3389/fnins.2023.1101071] [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: 11/17/2022] [Accepted: 08/08/2023] [Indexed: 09/12/2023] Open
Abstract
Gastrointestinal (GI) disorders are common comorbidities in individuals with autism spectrum disorder (ASD), and abnormalities in these issues have been found to be closely related to the severity of core behavioral deficits in autism. The enteric nervous system (ENS) plays a crucial role in regulating various aspects of gut functions, including gastrointestinal motility. Dysfunctional wiring in the ENS not only results in various gastrointestinal issues, but also correlates with an increasing number of central nervous system (CNS) disorders, such as ASD. However, it remains unclear whether the gastrointestinal dysfunctions are a consequence of ASD or if they directly contribute to its pathogenesis. This review focuses on the deficits in the ENS associated with ASD, and highlights several high-risk genes for ASD, which are expressed widely in the gut and implicated in gastrointestinal dysfunction among both animal models and human patients with ASD. Furthermore, we provide a brief overview of environmental factors associated with gastrointestinal tract in individuals with autism. This could offer fresh perspectives on our understanding of ASD.
Collapse
Affiliation(s)
- Xinnian Wang
- CAS Key Laboratory of Brain Connectome and Manipulation, The Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
- School of Life Science, USTC Life Sciences and Medicine, Hefei, China
| | - Ruijin Tang
- CAS Key Laboratory of Brain Connectome and Manipulation, The Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Zhen Wei
- Department of Child Psychiatry and Rehabilitation, Affiliated Shenzhen Maternity and Child Healthcare Hospital, Southern Medical University, Shenzhen, China
| | - Yang Zhan
- CAS Key Laboratory of Brain Connectome and Manipulation, The Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Jianping Lu
- Department of Child and Adolescent Psychiatry, Shenzhen Kangning Hospital, Shenzhen Mental Health Center, Shenzhen, China
| | - Zhiling Li
- CAS Key Laboratory of Brain Connectome and Manipulation, The Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| |
Collapse
|
3
|
Srivastava S, Sahin M, Buxbaum JD, Berry-Kravis E, Soorya LV, Thurm A, Bernstein JA, Asante-Otoo A, Bennett WE, Betancur C, Brickhouse TH, Passos Bueno MR, Chopra M, Christensen CK, Cully JL, Dies K, Friedman K, Gummere B, Holder JL, Jimenez-Gomez A, Kerins CA, Khan O, Kohlenberg T, Lacro RV, Levy LA, Levy T, Linnehan D, Loth E, Moshiree B, Neumeyer A, Paul SM, Phelan K, Persico A, Rapaport R, Rogers C, Saland J, Sethuram S, Shapiro J, Tarr PI, White KM, Wickstrom J, Williams KM, Winrow D, Wishart B, Kolevzon A. Updated consensus guidelines on the management of Phelan-McDermid syndrome. Am J Med Genet A 2023; 191:2015-2044. [PMID: 37392087 PMCID: PMC10524678 DOI: 10.1002/ajmg.a.63312] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 05/04/2023] [Accepted: 05/18/2023] [Indexed: 07/02/2023]
Abstract
Phelan-McDermid syndrome (PMS) is a genetic condition caused by SHANK3 haploinsufficiency and characterized by a wide range of neurodevelopmental and systemic manifestations. The first practice parameters for assessment and monitoring in individuals with PMS were published in 2014; recently, knowledge about PMS has grown significantly based on data from longitudinal phenotyping studies and large-scale genotype-phenotype investigations. The objective of these updated clinical management guidelines was to: (1) reflect the latest in knowledge in PMS and (2) provide guidance for clinicians, researchers, and the general community. A taskforce was established with clinical experts in PMS and representatives from the parent community. Experts joined subgroups based on their areas of specialty, including genetics, neurology, neurodevelopment, gastroenterology, primary care, physiatry, nephrology, endocrinology, cardiology, gynecology, and dentistry. Taskforce members convened regularly between 2021 and 2022 and produced specialty-specific guidelines based on iterative feedback and discussion. Taskforce leaders then established consensus within their respective specialty group and harmonized the guidelines. The knowledge gained over the past decade allows for improved guidelines to assess and monitor individuals with PMS. Since there is limited evidence specific to PMS, intervention mostly follows general guidelines for treating individuals with developmental disorders. Significant evidence has been amassed to guide the management of comorbid neuropsychiatric conditions in PMS, albeit mainly from caregiver report and the experience of clinical experts. These updated consensus guidelines on the management of PMS represent an advance for the field and will improve care in the community. Several areas for future research are also highlighted and will contribute to subsequent updates with more refined and specific recommendations as new knowledge accumulates.
Collapse
Affiliation(s)
- Siddharth Srivastava
- Department of Neurology, Boston Children’s Hospital, Boston, MA, USA
- Rosamund Stone Zander Translational Neuroscience Center, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Mustafa Sahin
- Department of Neurology, Boston Children’s Hospital, Boston, MA, USA
- Rosamund Stone Zander Translational Neuroscience Center, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Joseph D. Buxbaum
- Seaver Autism Center for Research and Treatment, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Elizabeth Berry-Kravis
- Department of Pediatrics, Rush University Medical Center, Chicago, IL, USA
- Department of Neurological Sciences, Rush University Medical Center, Chicago, IL, USA
- Department of Biochemistry, Rush University Medical Center, Chicago, IL, USA
| | | | - Audrey Thurm
- Neurodevelopmental and Behavioral Phenotyping Service, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
| | | | - Afua Asante-Otoo
- Rehabilitation Medicine Department, NIH Clinical Center, Bethesda, MD, USA
| | - William E. Bennett
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Catalina Betancur
- Sorbonne Université, INSERM, CNRS, Neuroscience Paris Seine, Institut de Biologie Paris Seine, Paris, France
| | - Tegwyn H. Brickhouse
- Department of Dental Public Health & Policy, School of Dentistry, Virginia Commonwealth University, Richmond, VA, USA
| | - Maria Rita Passos Bueno
- Departamento de Genética e Biologia Evolutiva, Centro de Estudos do Genoma Humano e Células-tronco, Instituto de Biociências, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Maya Chopra
- Department of Neurology, Boston Children’s Hospital, Boston, MA, USA
- Rosamund Stone Zander Translational Neuroscience Center, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Celanie K. Christensen
- Division of Developmental Medicine, Department of Pediatrics, Riley Children’s Health, Indianapolis, IN, USA
- Division of Child Neurology, Department of Neurology, Riley Children’s Health, Indianapolis, IN, USA
| | - Jennifer L. Cully
- Department of Pediatrics, College of Medicine and Division of Dentistry and Orthodontics, University of Cincinnati, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Kira Dies
- Department of Neurology, Boston Children’s Hospital, Boston, MA, USA
- Rosamund Stone Zander Translational Neuroscience Center, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Kate Friedman
- Seaver Autism Center for Research and Treatment, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - J. Lloyd Holder
- Department of Pediatrics-Neurology, Baylor College of Medicine, Houston, TX, USA
| | | | - Carolyn A. Kerins
- Department of Pediatric Dentistry, School of Dentistry, Texas A&M University, Dallas, TX, USA
| | - Omar Khan
- National Institute of Neurological Disease and Stroke, Bethesda, MD, USA
| | | | - Ronald V. Lacro
- Department of Cardiology, Boston Children’s Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA, USA
| | | | - Tess Levy
- Seaver Autism Center for Research and Treatment, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - Eva Loth
- Kings College London, London, UK
| | - Baharak Moshiree
- Department of Medicine, Wake Forest/Atrium Health, Charlotte, NC, USA
| | - Ann Neumeyer
- Lurie Center for Autism, Massachusetts General Hospital, Lexington MA, USA, Harvard Medical School, Boston, MA USA
| | - Scott M. Paul
- Rehabilitation Medicine Department, NIH Clinical Center, Bethesda, MD, USA
| | - Katy Phelan
- Genetics Laboratory, Florida Cancer Specialists and Research Institute, Fort Myers, FL, USA
| | - Antonio Persico
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Robert Rapaport
- Department of Pediatrics, Kravis Children’s Hospital, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - Jeffrey Saland
- Department of Pediatrics, Kravis Children’s Hospital, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Swathi Sethuram
- Department of Pediatrics, Massachusetts General Hospital, Boston, MA, USA
| | | | - Phillip I. Tarr
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
| | - Kerry M. White
- Division of Developmental Medicine, Department of Pediatrics, Riley Children’s Health, Indianapolis, IN, USA
- Department of Medical and Molecular Genetics, Riley Children’s Health, Indianapolis, IN, USA
| | - Jordan Wickstrom
- Sinai Rehabilitation Center, Lifebridge Health, Baltimore, MD, USA
| | - Kent M. Williams
- Department of Pediatrics, The Ohio State University School of Medicine, Columbus, OH, USA
| | | | | | - Alexander Kolevzon
- Seaver Autism Center for Research and Treatment, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Pediatrics, Kravis Children’s Hospital, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| |
Collapse
|
4
|
Vyas Y, Cheyne JE, Lee K, Jung Y, Cheung PY, Montgomery JM. Shankopathies in the Developing Brain in Autism Spectrum Disorders. Front Neurosci 2022; 15:775431. [PMID: 35002604 PMCID: PMC8727517 DOI: 10.3389/fnins.2021.775431] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 11/22/2021] [Indexed: 11/13/2022] Open
Abstract
The SHANK family of proteins play critical structural and functional roles in the postsynaptic density (PSD) at excitatory glutamatergic synapses. Through their multidomain structure they form a structural platform across the PSD for protein–protein interactions, as well as recruiting protein complexes to strengthen excitatory synaptic transmission. Mutations in SHANKs reflect their importance to synapse development and plasticity. This is evident in autism spectrum disorder (ASD), a neurodevelopmental disorder resulting in behavioural changes including repetitive behaviours, lack of sociability, sensory issues, learning, and language impairments. Human genetic studies have revealed ASD mutations commonly occur in SHANKs. Rodent models expressing these mutations display ASD behavioural impairments, and a subset of these deficits are rescued by reintroduction of Shank in adult animals, suggesting that lack of SHANK during key developmental periods can lead to permanent changes in the brain’s wiring. Here we explore the differences in synaptic function and plasticity from development onward in rodent Shank ASD models. To date the most explored brain regions, relate to the behavioural changes observed, e.g., the striatum, hippocampus, sensory, and prefrontal cortex. In addition, less-studied regions including the hypothalamus, cerebellum, and peripheral nervous system are also affected. Synaptic phenotypes include weakened but also strengthened synaptic function, with NMDA receptors commonly affected, as well as changes in the balance of excitation and inhibition especially in cortical brain circuits. The effects of shankopathies in activity-dependent brain wiring is an important target for therapeutic intervention. We therefore highlight areas of research consensus and identify remaining questions and challenges.
Collapse
Affiliation(s)
- Yukti Vyas
- Department of Physiology, Faculty of Medical and Health Sciences, Centre for Brain Research, University of Auckland, Auckland, New Zealand
| | - Juliette E Cheyne
- Department of Physiology, Faculty of Medical and Health Sciences, Centre for Brain Research, University of Auckland, Auckland, New Zealand
| | - Kevin Lee
- Department of Physiology, Faculty of Medical and Health Sciences, Centre for Brain Research, University of Auckland, Auckland, New Zealand.,Department of Pharmacology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Yewon Jung
- Department of Physiology, Faculty of Medical and Health Sciences, Centre for Brain Research, University of Auckland, Auckland, New Zealand.,Department of Pharmacology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Pang Ying Cheung
- Department of Physiology, Faculty of Medical and Health Sciences, Centre for Brain Research, University of Auckland, Auckland, New Zealand
| | - Johanna M Montgomery
- Department of Physiology, Faculty of Medical and Health Sciences, Centre for Brain Research, University of Auckland, Auckland, New Zealand
| |
Collapse
|
5
|
Riemersma IW, Havekes R, Kas MJH. Spatial and Temporal Gene Function Studies in Rodents: Towards Gene-Based Therapies for Autism Spectrum Disorder. Genes (Basel) 2021; 13:28. [PMID: 35052369 PMCID: PMC8774890 DOI: 10.3390/genes13010028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/06/2021] [Accepted: 12/20/2021] [Indexed: 12/26/2022] Open
Abstract
Autism spectrum disorder (ASD) is a complex neurodevelopmental condition that is characterized by differences in social interaction, repetitive behaviors, restricted interests, and sensory differences beginning early in life. Especially sensory symptoms are highly correlated with the severity of other behavioral differences. ASD is a highly heterogeneous condition on multiple levels, including clinical presentation, genetics, and developmental trajectories. Over a thousand genes have been implicated in ASD. This has facilitated the generation of more than two hundred genetic mouse models that are contributing to understanding the biological underpinnings of ASD. Since the first symptoms already arise during early life, it is especially important to identify both spatial and temporal gene functions in relation to the ASD phenotype. To further decompose the heterogeneity, ASD-related genes can be divided into different subgroups based on common functions, such as genes involved in synaptic function. Furthermore, finding common biological processes that are modulated by this subgroup of genes is essential for possible patient stratification and the development of personalized early treatments. Here, we review the current knowledge on behavioral rodent models of synaptic dysfunction by focusing on behavioral phenotypes, spatial and temporal gene function, and molecular targets that could lead to new targeted gene-based therapy.
Collapse
Affiliation(s)
| | | | - Martien J. H. Kas
- Groningen Institute for Evolutionary Life Sciences, Neurobiology, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands; (I.W.R.); (R.H.)
| |
Collapse
|
6
|
Delling JP, Boeckers TM. Comparison of SHANK3 deficiency in animal models: phenotypes, treatment strategies, and translational implications. J Neurodev Disord 2021; 13:55. [PMID: 34784886 PMCID: PMC8594088 DOI: 10.1186/s11689-021-09397-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 09/27/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Autism spectrum disorder (ASD) is a neurodevelopmental condition, which is characterized by clinical heterogeneity and high heritability. Core symptoms of ASD include deficits in social communication and interaction, as well as restricted, repetitive patterns of behavior, interests, or activities. Many genes have been identified that are associated with an increased risk for ASD. Proteins encoded by these ASD risk genes are often involved in processes related to fetal brain development, chromatin modification and regulation of gene expression in general, as well as the structural and functional integrity of synapses. Genes of the SH3 and multiple ankyrin repeat domains (SHANK) family encode crucial scaffolding proteins (SHANK1-3) of excitatory synapses and other macromolecular complexes. SHANK gene mutations are highly associated with ASD and more specifically the Phelan-McDermid syndrome (PMDS), which is caused by heterozygous 22q13.3-deletion resulting in SHANK3-haploinsufficiency, or by SHANK3 missense variants. SHANK3 deficiency and potential treatment options have been extensively studied in animal models, especially in mice, but also in rats and non-human primates. However, few of the proposed therapeutic strategies have translated into clinical practice yet. MAIN TEXT This review summarizes the literature concerning SHANK3-deficient animal models. In particular, the structural, behavioral, and neurological abnormalities are described and compared, providing a broad and comprehensive overview. Additionally, the underlying pathophysiologies and possible treatments that have been investigated in these models are discussed and evaluated with respect to their effect on ASD- or PMDS-associated phenotypes. CONCLUSIONS Animal models of SHANK3 deficiency generated by various genetic strategies, which determine the composition of the residual SHANK3-isoforms and affected cell types, show phenotypes resembling ASD and PMDS. The phenotypic heterogeneity across multiple models and studies resembles the variation of clinical severity in human ASD and PMDS patients. Multiple therapeutic strategies have been proposed and tested in animal models, which might lead to translational implications for human patients with ASD and/or PMDS. Future studies should explore the effects of new therapeutic approaches that target genetic haploinsufficiency, like CRISPR-mediated activation of promotors.
Collapse
Affiliation(s)
- Jan Philipp Delling
- Institute for Anatomy and Cell Biology, Ulm University, Albert-Einstein-Allee 11, Ulm, 89081, Germany.
| | - Tobias M Boeckers
- Institute for Anatomy and Cell Biology, Ulm University, Albert-Einstein-Allee 11, Ulm, 89081, Germany. .,Ulm Site, DZNE, Ulm, Germany.
| |
Collapse
|
7
|
Lutz AK, Pfaender S, Incearap B, Ioannidis V, Ottonelli I, Föhr KJ, Cammerer J, Zoller M, Higelin J, Giona F, Stetter M, Stoecker N, Alami NO, Schön M, Orth M, Liebau S, Barbi G, Grabrucker AM, Delorme R, Fauler M, Mayer B, Jesse S, Roselli F, Ludolph AC, Bourgeron T, Verpelli C, Demestre M, Boeckers TM. Autism-associated SHANK3 mutations impair maturation of neuromuscular junctions and striated muscles. Sci Transl Med 2021; 12:12/547/eaaz3267. [PMID: 32522805 DOI: 10.1126/scitranslmed.aaz3267] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 12/09/2019] [Accepted: 04/07/2020] [Indexed: 12/12/2022]
Abstract
Heterozygous mutations of the gene encoding the postsynaptic protein SHANK3 are associated with syndromic forms of autism spectrum disorders (ASDs). One of the earliest clinical symptoms in SHANK3-associated ASD is neonatal skeletal muscle hypotonia. This symptom can be critical for the early diagnosis of affected children; however, the mechanism mediating hypotonia in ASD is not completely understood. Here, we used a combination of patient-derived human induced pluripotent stem cells (hiPSCs), Shank3Δ11(-/-) mice, and Phelan-McDermid syndrome (PMDS) muscle biopsies from patients of different ages to analyze the role of SHANK3 on motor unit development. Our results suggest that the hypotonia in SHANK3 deficiency might be caused by dysfunctions in all elements of the voluntary motor system: motoneurons, neuromuscular junctions (NMJs), and striated muscles. We found that SHANK3 localizes in Z-discs in the skeletal muscle sarcomere and co-immunoprecipitates with α-ACTININ. SHANK3 deficiency lead to shortened Z-discs and severe impairment of acetylcholine receptor clustering in hiPSC-derived myotubes and in muscle from Shank3Δ11(-/-) mice and patients with PMDS, indicating a crucial role for SHANK3 in the maturation of NMJs and striated muscle. Functional motor defects in Shank3Δ11(-/-) mice could be rescued with the troponin activator Tirasemtiv that sensitizes muscle fibers to calcium. Our observations give insight into the function of SHANK3 besides the central nervous system and imply potential treatment strategies for SHANK3-associated ASD.
Collapse
Affiliation(s)
- Anne-Kathrin Lutz
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Stefanie Pfaender
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Berra Incearap
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Valentin Ioannidis
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Ilaria Ottonelli
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Karl J Föhr
- Department of Anesthesiology, Ulm University Hospital, 89081 Ulm, Germany
| | - Judith Cammerer
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Marvin Zoller
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Julia Higelin
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Federica Giona
- CNR Neuroscience Institute, University of Milan, 20129 Milan, Italy.,BIOMETRA University of Milan, 20129 Milan, Italy
| | - Maximilian Stetter
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Nicole Stoecker
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | | | - Michael Schön
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | | | - Stefan Liebau
- Institute of Neuroanatomy and Developmental Biology, Eberhard Karls University Tübingen, 72074 Tübingen, Germany
| | - Gotthold Barbi
- Institute for Human Genetics, Ulm University Hospital, 89081 Ulm, Germany
| | - Andreas M Grabrucker
- Cellular Neurobiology and Neuro-Nanotechnology Lab, Department of Biological Sciences, University of Limerick, V94PH61 Limerick, Ireland.,Bernal Institute, University of Limerick, V94T9PX Limerick, Ireland.,Health Research Institute (HRI), University of Limerick, V94T9PX Limerick, Ireland
| | - Richard Delorme
- Child and Adolescent Psychiatry Department, APHP, Robert-Debré Hospital, 750197 Paris, France
| | - Michael Fauler
- Institute of General Physiology, Ulm University, 89081 Ulm, Germany
| | - Benjamin Mayer
- Institute of Epidemiology and Medical Biometry, Ulm University, 89075 Ulm, Germany
| | | | | | | | - Thomas Bourgeron
- Génétique Humaine et Fonctions Cognitives, Université Paris Diderot, Institut Pasteur, 75015 Paris, France
| | - Chiara Verpelli
- CNR Neuroscience Institute, University of Milan, 20129 Milan, Italy.,BIOMETRA University of Milan, 20129 Milan, Italy
| | - Maria Demestre
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany.
| | - Tobias M Boeckers
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany. .,DZNE, Ulm Site, 89081 Ulm, Germany
| |
Collapse
|
8
|
Ricciardello A, Tomaiuolo P, Persico AM. Genotype-phenotype correlation in Phelan-McDermid syndrome: A comprehensive review of chromosome 22q13 deleted genes. Am J Med Genet A 2021; 185:2211-2233. [PMID: 33949759 PMCID: PMC8251815 DOI: 10.1002/ajmg.a.62222] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 03/28/2021] [Accepted: 04/04/2021] [Indexed: 12/19/2022]
Abstract
Phelan‐McDermid syndrome (PMS, OMIM #606232), also known as chromosome 22q13 deletion syndrome, is a rare genetic disorder characterized by intellectual disability, hypotonia, delayed or absent speech, motor impairment, autism spectrum disorder, behavioral anomalies, and minor aspecific dysmorphic features. Haploinsufficiency of SHANK3, due to intragenic deletions or point mutations, is sufficient to cause many neurobehavioral features of PMS. However, several additional genes located within larger 22q13 deletions can contribute to the great interindividual variability observed in the PMS phenotype. This review summarizes the phenotypic contributions predicted for 213 genes distributed along the largest 22q13.2‐q13.33 terminal deletion detected in our sample of 63 PMS patients by array‐CGH analysis, spanning 9.08 Mb. Genes have been grouped into four categories: (1) genes causing human diseases with an autosomal dominant mechanism, or (2) with an autosomal recessive mechanism; (3) morphogenetically relevant genes, either involved in human diseases with additive co‐dominant, polygenic, and/or multifactorial mechanisms, or implicated in animal models but not yet documented in human pathology; (4) protein coding genes either functionally nonrelevant, with unknown function, or pathogenic through mechanisms other than haploinsufficiency; piRNAs, noncoding RNAs, miRNAs, novel transcripts and pseudogenes. Our aim is to understand genotype–phenotype correlations in PMS patients and to provide clinicians with a conceptual framework to promote evidence‐based genetic work‐ups, clinical assessments, and therapeutic interventions.
Collapse
Affiliation(s)
- Arianna Ricciardello
- Interdepartmental Program "Autism 0-90", "Gaetano Martino" University Hospital, University of Messina, Messina, Italy
| | - Pasquale Tomaiuolo
- Interdepartmental Program "Autism 0-90", "Gaetano Martino" University Hospital, University of Messina, Messina, Italy
| | - Antonio M Persico
- Interdepartmental Program "Autism 0-90", "Gaetano Martino" University Hospital, University of Messina, Messina, Italy
| |
Collapse
|
9
|
Lanciego JL, Wouterlood FG. Neuroanatomical tract-tracing techniques that did go viral. Brain Struct Funct 2020; 225:1193-1224. [PMID: 32062721 PMCID: PMC7271020 DOI: 10.1007/s00429-020-02041-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Accepted: 01/31/2020] [Indexed: 12/29/2022]
Abstract
Neuroanatomical tracing methods remain fundamental for elucidating the complexity of brain circuits. During the past decades, the technical arsenal at our disposal has been greatly enriched, with a steady supply of fresh arrivals. This paper provides a landscape view of classical and modern tools for tract-tracing purposes. Focus is placed on methods that have gone viral, i.e., became most widespread used and fully reliable. To keep an historical perspective, we start by reviewing one-dimensional, standalone transport-tracing tools; these including today's two most favorite anterograde neuroanatomical tracers such as Phaseolus vulgaris-leucoagglutinin and biotinylated dextran amine. Next, emphasis is placed on several classical tools widely used for retrograde neuroanatomical tracing purposes, where Fluoro-Gold in our opinion represents the best example. Furthermore, it is worth noting that multi-dimensional paradigms can be designed by combining different tracers or by applying a given tracer together with detecting one or more neurochemical substances, as illustrated here with several examples. Finally, it is without any doubt that we are currently witnessing the unstoppable and spectacular rise of modern molecular-genetic techniques based on the use of modified viruses as delivery vehicles for genetic material, therefore, pushing the tract-tracing field forward into a new era. In summary, here, we aim to provide neuroscientists with the advice and background required when facing a choice on which neuroanatomical tracer-or combination thereof-might be best suited for addressing a given experimental design.
Collapse
Affiliation(s)
- Jose L Lanciego
- Neurosciences Department, Center for Applied Medical Research (CIMA), University of Navarra, Pio XII Avenue 55, 31008, Pamplona, Spain.
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CiberNed), Pamplona, Spain.
- Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain.
| | - Floris G Wouterlood
- Department of Anatomy and Neurosciences, Amsterdam University Medical Centers, Location VUmc, Neuroscience Campus Amsterdam, P.O. Box 7057, 1007 MB, Amsterdam, The Netherlands.
| |
Collapse
|
10
|
James DM, Kozol RA, Kajiwara Y, Wahl AL, Storrs EC, Buxbaum JD, Klein M, Moshiree B, Dallman JE. Intestinal dysmotility in a zebrafish ( Danio rerio) shank3a;shank3b mutant model of autism. Mol Autism 2019; 10:3. [PMID: 30733854 PMCID: PMC6357389 DOI: 10.1186/s13229-018-0250-4] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 11/26/2018] [Indexed: 02/06/2023] Open
Abstract
Background and aims Autism spectrum disorder (ASD) is currently estimated to affect more than 1% of the world population. For people with ASD, gastrointestinal (GI) distress is a commonly reported but a poorly understood co-occurring symptom. Here, we investigate the physiological basis for GI distress in ASD by studying gut function in a zebrafish model of Phelan-McDermid syndrome (PMS), a condition caused by mutations in the SHANK3 gene. Methods To generate a zebrafish model of PMS, we used CRISPR/Cas9 to introduce clinically related C-terminal frameshift mutations in shank3a and shank3b zebrafish paralogues (shank3abΔC). Because PMS is caused by SHANK3 haploinsufficiency, we assessed the digestive tract (DT) structure and function in zebrafish shank3abΔC+/− heterozygotes. Human SHANK3 mRNA was then used to rescue DT phenotypes in larval zebrafish. Results Significantly slower rates of DT peristaltic contractions (p < 0.001) with correspondingly prolonged passage time (p < 0.004) occurred in shank3abΔC+/− mutants. Rescue injections of mRNA encoding the longest human SHANK3 isoform into shank3abΔC+/− mutants produced larvae with intestinal bulb emptying similar to wild type (WT), but still deficits in posterior intestinal motility. Serotonin-positive enteroendocrine cells (EECs) were significantly reduced in both shank3abΔC+/− and shank3abΔC−/− mutants (p < 0.05) while enteric neuron counts and overall structure of the DT epithelium, including goblet cell number, were unaffected in shank3abΔC+/− larvae. Conclusions Our data and rescue experiments support mutations in SHANK3 as causal for GI transit and motility abnormalities. Reductions in serotonin-positive EECs and serotonin-filled ENS boutons suggest an endocrine/neural component to this dysmotility. This is the first study to date demonstrating DT dysmotility in a zebrafish single gene mutant model of ASD. Electronic supplementary material The online version of this article (10.1186/s13229-018-0250-4) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- David M James
- 1Department of Biology, University of Miami, Coral Gables, FL USA
| | - Robert A Kozol
- 1Department of Biology, University of Miami, Coral Gables, FL USA
| | - Yuji Kajiwara
- 2Seaver Autism Center for Research and Treatment, Department of Psychiatry, Friedman Brain Institute and Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY USA.,5Denali Therapeutics, South San Francisco, CA USA
| | - Adam L Wahl
- 1Department of Biology, University of Miami, Coral Gables, FL USA
| | - Emily C Storrs
- 1Department of Biology, University of Miami, Coral Gables, FL USA
| | - Joseph D Buxbaum
- 2Seaver Autism Center for Research and Treatment, Department of Psychiatry, Friedman Brain Institute and Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Mason Klein
- 3Department of Physics, University of Miami, Coral Gables, FL USA
| | - Baharak Moshiree
- Division of Gastroenterology, Atrium Health, University of North Carolina, Charlotte, NC USA
| | - Julia E Dallman
- 1Department of Biology, University of Miami, Coral Gables, FL USA
| |
Collapse
|
11
|
Tabouy L, Getselter D, Ziv O, Karpuj M, Tabouy T, Lukic I, Maayouf R, Werbner N, Ben-Amram H, Nuriel-Ohayon M, Koren O, Elliott E. Dysbiosis of microbiome and probiotic treatment in a genetic model of autism spectrum disorders. Brain Behav Immun 2018; 73:310-319. [PMID: 29787855 DOI: 10.1016/j.bbi.2018.05.015] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 05/08/2018] [Accepted: 05/18/2018] [Indexed: 02/06/2023] Open
Abstract
Recent studies have determined that the microbiome has direct effects on behavior, and may be dysregulated in neurodevelopmental conditions. Considering that neurodevelopmental conditions, such as autism, have a strong genetic etiology, it is necessary to understand if genes associated with neurodevelopmental disorders, such as Shank3, can influence the gut microbiome, and if probiotics can be a therapeutic tool. In this study, we have identified dysregulation of several genera and species of bacteria in the gut and colon of both male and female Shank3 KO mice. L. reuteri, a species with decreased relative abundance in the Shank3 KO mice, positively correlated with the expression of gamma-Aminobutyric acid (GABA) receptor subunits in the brain. Treatment of Shank3 KO mice with L. reuteri induced an attenuation of unsocial behavior specifically in male Shank3 mice, and a decrease in repetitive behaviors in both male and female Shank3 KO mice. In addition, L. reuteri treatment affected GABA receptor gene expression and protein levels in multiple brain regions. This study identifies bacterial species that are sensitive to an autism-related mutation, and further suggests a therapeutic potential for probiotic treatment.
Collapse
Affiliation(s)
- Laure Tabouy
- Molecular and Behavioral Neurosciences Lab, Faculty of Medicine in the Galilee, Bar-Ilan University, 1311502 Safed, Israel
| | - Dimitry Getselter
- Molecular and Behavioral Neurosciences Lab, Faculty of Medicine in the Galilee, Bar-Ilan University, 1311502 Safed, Israel
| | - Oren Ziv
- Microbiome Research Lab, Faculty of Medicine in the Galilee, Bar-Ilan University, 1311502 Safed, Israel
| | - Marcela Karpuj
- Genomic Center Faculty of Medicine in the Galilee, Bar-Ilan University, 1311502 Safed, Israel; Biotechnology Engineering Department, Orte Braude, 21616 Karmiel, Israel
| | - Timothée Tabouy
- UMR 518 Applied Mathematics and Informatics (MIA)-Paris, French National Institute for Agricultural Research INRA/AgroParisTech, Paris-Saclay University, 75005 Paris, France
| | - Iva Lukic
- Molecular and Behavioral Neurosciences Lab, Faculty of Medicine in the Galilee, Bar-Ilan University, 1311502 Safed, Israel
| | - Rasha Maayouf
- Molecular and Behavioral Neurosciences Lab, Faculty of Medicine in the Galilee, Bar-Ilan University, 1311502 Safed, Israel
| | - Nir Werbner
- Microbiome Research Lab, Faculty of Medicine in the Galilee, Bar-Ilan University, 1311502 Safed, Israel
| | - Hila Ben-Amram
- Microbiome Research Lab, Faculty of Medicine in the Galilee, Bar-Ilan University, 1311502 Safed, Israel
| | - Meital Nuriel-Ohayon
- Microbiome Research Lab, Faculty of Medicine in the Galilee, Bar-Ilan University, 1311502 Safed, Israel
| | - Omry Koren
- Microbiome Research Lab, Faculty of Medicine in the Galilee, Bar-Ilan University, 1311502 Safed, Israel
| | - Evan Elliott
- Molecular and Behavioral Neurosciences Lab, Faculty of Medicine in the Galilee, Bar-Ilan University, 1311502 Safed, Israel.
| |
Collapse
|
12
|
Li W, Huang L, Zeng J, Lin W, Li K, Sun J, Huang W, Chen J, Wang G, Ke Q, Duan J, Lai X, Chen R, Liu M, Liu Y, Wang T, Yang X, Chen Y, Xia H, Xiang AP. Characterization and transplantation of enteric neural crest cells from human induced pluripotent stem cells. Mol Psychiatry 2018; 23:499-508. [PMID: 27777423 PMCID: PMC5822467 DOI: 10.1038/mp.2016.191] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 08/07/2015] [Accepted: 09/14/2016] [Indexed: 12/30/2022]
Abstract
The enteric nervous system (ENS) is recognized as a second brain because of its complexity and its largely autonomic control of bowel function. Recent progress in studying the interactions between the ENS and the central nervous system (CNS) has implicated alterations of the gut/brain axis as a possible mechanism in the pathophysiology of autism spectrum disorders (ASDs), Parkinson's disease (PD) and other human CNS disorders, whereas the underlying mechanisms are largely unknown because of the lack of good model systems. Human induced pluripotent stem cells (hiPSCs) have the ability to proliferate indefinitely and differentiate into cells of all three germ layers, thus making iPSCs an ideal source of cells for disease modelling and cell therapy. Here, hiPSCs were induced to differentiate into neural crest stem cells (NCSCs) efficiently. When co-cultured with smooth muscle layers of ganglionic gut tissue, the NCSCs differentiated into different subtypes of mature enteric-like neurons expressing nitric oxide synthase (nNOS), vasoactive intestinal polypeptide (VIP), choline acetyltransferase (ChAT) or calretinin with typical electrophysiological characteristics of functional neurons. Furthermore, when they were transplanted into aneural or aganglionic chick, mouse or human gut tissues in ovo, in vitro or in vivo, hiPSC-derived NCSCs showed extensive migration and neural differentiation capacity, generating neurons and glial cells that expressed phenotypic markers characteristic of the enteric nervous system. Our results indicate that enteric NCSCs derived from hiPSCs supply a powerful tool for studying the pathogenesis of gastrointestinal disorders and brain/gut dysfunction and represent a potentially ideal cell source for enteric neural transplantation treatments.
Collapse
Affiliation(s)
- W Li
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China,Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China,Department of Biochemistry, Zhongshan Medical School, Sun Yat-sen University, Guangzhou, China,Guangdong Key Laboratory of Reproductive Medicine, Guangzhou, Guangdong, China
| | - L Huang
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China,Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - J Zeng
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China,Department of Pediatric Surgery, Guangzhou Women and Children's Medical Centre, Guangzhou, China
| | - W Lin
- Department of Blood Transfusion, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - K Li
- Department of Ultrasound, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - J Sun
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China,Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - W Huang
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China,Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - J Chen
- Department of Histology and Embryology, School of Medicine, Jinan University, Guangzhou, China
| | - G Wang
- Department of Histology and Embryology, School of Medicine, Jinan University, Guangzhou, China
| | - Q Ke
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China,Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China,Department of Cell Biology, Zhongshan Medical School, Sun Yat-sen University, Guangzhou, China
| | - J Duan
- Center for Neurobiology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - X Lai
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China,Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - R Chen
- Center for Reproductive Medicine, Key Laboratory for Reproductive Medicine of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - M Liu
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China,Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Y Liu
- Shenzhen Beike Cell Engineering Research Institute, Shenzhen, China
| | - T Wang
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China,Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China,Department of Biochemistry, Zhongshan Medical School, Sun Yat-sen University, Guangzhou, China
| | - X Yang
- Department of Histology and Embryology, School of Medicine, Jinan University, Guangzhou, China
| | - Y Chen
- Center for Neurobiology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - H Xia
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China,Department of Pediatric Surgery, Guangzhou Women and Children's Medical Centre, Guangzhou, China,Guangzhou Women and Children's Medical Centre, No. 9, Jinsui Road, Guangzhou, Guangdong 510623, China
| | - A P Xiang
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China,Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China,Department of Biochemistry, Zhongshan Medical School, Sun Yat-sen University, Guangzhou, China,Guangdong Key Laboratory of Reproductive Medicine, Guangzhou, Guangdong, China,Center for Stem Cell Biology and Tissue Engineering, Sun Yat-sen University, No. 74, Zhongshan 2nd Road, Guangzhou, Guangdong 510080, China. E-mail: or
| |
Collapse
|
13
|
Zimmermann J, Neuhuber WL, Raab M. Homer1 (VesL-1) in the rat esophagus: focus on myenteric plexus and neuromuscular junction. Histochem Cell Biol 2017; 148:189-206. [PMID: 28337539 DOI: 10.1007/s00418-017-1555-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/23/2017] [Indexed: 12/20/2022]
Abstract
Homer1, a scaffolding protein of the postsynaptic density (PSD), enriched at excitatory synapses is known to anchor and modulate group I metabotropic glutamate receptors (mGluRs) and different channel- and receptor-proteins. Homer proteins are expressed in neurons of different brain regions, but also in non-neuronal tissues like skeletal muscle. Occurrence and location of Homer1 and mGluR5 in myenteric plexus and neuromuscular junctions (NMJ) of rat esophagus have yet not been characterized. We located Homer1 and mGluR5 immunoreactivity (-iry) in rat esophagus and focused on myenteric neurons, intraganglionic laminar endings (IGLEs) and NMJs, using double- and triple-label immunohistochemistry and confocal laser scanning microscopy. Homer1-iry was found in a subpopulation of vesicular glutamate transporter 2 (VGLUT2) positive IGLEs and cholinergic varicosities within myenteric ganglia, but neither in nitrergic nor cholinergic myenteric neuronal cell bodies. Homer1-iry was detected in 63% of esophageal and, for comparison, in 35% of sternomastoid NMJs. Besides the location in the PSD, Homer1-iry colocalized with cholinergic markers, indicating a presynaptic location in coarse VAChT/CGRP/NF200- immunoreactive (-ir) terminals of nucleus ambiguus neurons supplying striated esophageal muscle. mGluR5-iry was found in subpopulations of myenteric neuronal cell bodies, VGLUT2-ir IGLEs and cholinergic varicosities within the myenteric neuropil and NMJs of esophagus and sternomastoid muscles. Thus, Homer1 may anchor mGluR5 at presynaptic sites of cholinergic boutons at esophageal motor endplates, in a small subpopulation of VGLUT2-ir IGLEs and cholinergic varicosities within myenteric ganglia possibly modulating Ca2+-currents and neurotransmitter release.
Collapse
Affiliation(s)
- J Zimmermann
- Institut für Anatomie, Lehrstuhl I, Friedrich-Alexander-Universität, Krankenhausstr. 9, 91054, Erlangen, Germany
| | - W L Neuhuber
- Institut für Anatomie, Lehrstuhl I, Friedrich-Alexander-Universität, Krankenhausstr. 9, 91054, Erlangen, Germany
| | - M Raab
- Institut für Anatomie, Lehrstuhl I, Friedrich-Alexander-Universität, Krankenhausstr. 9, 91054, Erlangen, Germany.
| |
Collapse
|
14
|
Extracerebral Dysfunction in Animal Models of Autism Spectrum Disorder. ADVANCES IN ANATOMY, EMBRYOLOGY, AND CELL BIOLOGY 2017; 224:159-187. [PMID: 28551756 DOI: 10.1007/978-3-319-52498-6_9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Genetic factors might be largely responsible for the development of autism spectrum disorder (ASD) that alone or in combination with specific environmental risk factors trigger the pathology. Multiple mutations identified in ASD patients that impair synaptic function in the central nervous system are well studied in animal models. How these mutations might interact with other risk factors is not fully understood though. Additionally, how systems outside of the brain are altered in the context of ASD is an emerging area of research. Extracerebral influences on the physiology could begin in utero and contribute to changes in the brain and in the development of other body systems and further lead to epigenetic changes. Therefore, multiple recent studies have aimed at elucidating the role of gene-environment interactions in ASD. Here we provide an overview on the extracerebral systems that might play an important associative role in ASD and review evidence regarding the potential roles of inflammation, trace metals, metabolism, genetic susceptibility, enteric nervous system function and the microbiota of the gastrointestinal (GI) tract on the development of endophenotypes in animal models of ASD. By influencing environmental conditions, it might be possible to reduce or limit the severity of ASD pathology.
Collapse
|
15
|
Torres EB, Nguyen J, Mistry S, Whyatt C, Kalampratsidou V, Kolevzon A. Characterization of the Statistical Signatures of Micro-Movements Underlying Natural Gait Patterns in Children with Phelan McDermid Syndrome: Towards Precision-Phenotyping of Behavior in ASD. Front Integr Neurosci 2016; 10:22. [PMID: 27445720 PMCID: PMC4921802 DOI: 10.3389/fnint.2016.00022] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 06/07/2016] [Indexed: 01/06/2023] Open
Abstract
Background: There is a critical need for precision phenotyping across neurodevelopmental disorders, especially in individuals who receive a clinical diagnosis of autism spectrum disorder (ASD). Phelan-McDermid deletion syndrome (PMS) is one such example, as it has a high penetrance of ASD. At present, no biometric characterization of the behavioral phenotype within PMS exists. Methods: We introduce a data-type and statistical framework that permits the personalized profiling of naturalistic behaviors. Walking patterns were assessed in 30 participants (16 PMS, 3 idiopathic-ASD and 11 age- and sex-matched controls). Each individual's micro-movement signatures were recorded at 240 Hz. We empirically estimated the parameters of the continuous Gamma family of probability distributions and calculated their ranges. These estimated stochastic signatures were then mapped on the Gamma plane to obtain several statistical indexes for each child. To help visualize complex patterns across the cohort, we introduce new tools that enable the assessment of connectivity and modularity indexes across the peripheral network of rotational joints. Results: Typical walking signatures are absent in all children with PMS as well as in the children with idiopathic-ASD (iASD). Underlying these patterns are atypical leg rotational acceleration signatures that render participants with PMS unstable with rotations that are much faster than controls. The median values of the estimated Gamma parameters serve as a cutoff to automatically separate children with PMS 5–7 years old from adolescents with PMS 12–16 years old, the former displaying more randomness and larger noise. The fluctuations in the arm's motions during the walking also have atypical statistics that separate males from females in PMS and show higher rates of noise accumulation in idiopathic ASD (iASD) children. Despite high heterogeneity, all iASD children have excess noise, a narrow range of probability-distribution shapes across the body joints and a distinct joint network connectivity pattern. Both PMS and iASD have systemic issues with noise in micro-motions across the body with specific signatures for each child that, as a cohort, selectively deviates from controls. Conclusions: We provide a new methodology for precision behavioral phenotyping with the potential to use micro-movement output noise as a natural classifier of neurodevelopmental disorders of known etiology. This approach may help us better understand idiopathic neurodevelopmental disorders and personalize the assessments of natural movements in these populations.
Collapse
Affiliation(s)
- Elizabeth B Torres
- Department of Psychology, Computer Science, Rutgers Center for Cognitive Sciences and Computational Biomedicine Imaging and Modelling Center of Computer Science, Rutgers The State University of New Jersey New Brunswick, NJ, USA
| | - Jillian Nguyen
- Graduate Program in Neuroscience, Rutgers The State University of New Jersey New Brunswick, NJ, USA
| | - Sejal Mistry
- Department of Mathematics, Rutgers The State University of New Jersey New Brunswick, NJ, USA
| | - Caroline Whyatt
- Department of Psychology, Rutgers The State University of New Jersey New Brunswick, NJ, USA
| | - Vilelmini Kalampratsidou
- Department of Computer Science, Rutgers The State University of New Jersey New Brunswick, NJ, USA
| | - Alexander Kolevzon
- Psychiatry, Seaver Autism Center for Research and Treatment, Icahn School of Medicine at Mount Sinai New York, NY, USA
| |
Collapse
|
16
|
Cellular Zinc Homeostasis Contributes to Neuronal Differentiation in Human Induced Pluripotent Stem Cells. Neural Plast 2016; 2016:3760702. [PMID: 27247802 PMCID: PMC4876239 DOI: 10.1155/2016/3760702] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 03/24/2016] [Indexed: 11/23/2022] Open
Abstract
Disturbances in neuronal differentiation and function are an underlying factor of many brain disorders. Zinc homeostasis and signaling are important mediators for a normal brain development and function, given that zinc deficiency was shown to result in cognitive and emotional deficits in animal models that might be associated with neurodevelopmental disorders. One underlying mechanism of the observed detrimental effects of zinc deficiency on the brain might be impaired proliferation and differentiation of stem cells participating in neurogenesis. Thus, to examine the molecular mechanisms regulating zinc metabolism and signaling in differentiating neurons, using a protocol for motor neuron differentiation, we characterized the expression of zinc homeostasis genes during neurogenesis using human induced pluripotent stem cells (hiPSCs) and evaluated the influence of altered zinc levels on the expression of zinc homeostasis genes, cell survival, cell fate, and neuronal function. Our results show that zinc transporters are highly regulated genes during neuronal differentiation and that low zinc levels are associated with decreased cell survival, altered neuronal differentiation, and, in particular, synaptic function. We conclude that zinc deficiency in a critical time window during brain development might influence brain function by modulating neuronal differentiation.
Collapse
|
17
|
Abstract
Phelan-McDermid syndrome (PMS), also called 22q13.3 deletion syndrome, is a neurodevelopmental disorder characterized by global developmental delay, intellectual disability, severe speech delays, poor motor tone and function, and autism spectrum disorder (ASD). Although the overall prevalence of PMS is unknown, there have been at least 1200 cases reported worldwide, according to the Phelan-McDermid Syndrome Foundation. PMS is now considered to be a relatively common cause of ASD and intellectual disability, accounting for between 0.5% and 2.0% of cases. The cause of PMS has been isolated to loss of function of one copy of SHANK3, which codes for a master scaffolding protein found in the postsynaptic density of excitatory synapses. Reduced expression of SH3 and multiple ankyrin repeat domains 3 (SHANK3) leads to reduced numbers of dendrites, and impaired synaptic transmission and plasticity. Recent mouse and human neuronal models of PMS have led to important opportunities to develop novel therapeutics, and at least 2 clinical trials are underway, one in the USA, and one in the Netherlands. The SHANK3 pathway may also be relevant to other forms of ASD, and many of the single-gene causes of ASD identified to date appear to converge on several common molecular pathways that underlie synaptic neurotransmission. As a result, treatments developed for PMS may also affect other forms of ASD.
Collapse
Affiliation(s)
- Jesse L. Costales
- />Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Alexander Kolevzon
- />Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY USA
- />Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY USA
- />Seaver Autism Center for Research and Treatment, Icahn School of Medicine at Mount Sinai, New York, NY USA
- />Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY USA
- />Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY USA
| |
Collapse
|
18
|
Ortiz R, Niciu MJ, Lukkahati N, Saligan LN, Nugent AC, Luckenbaugh DA, Machado-Vieira R, Zarate CA. Shank3 as a potential biomarker of antidepressant response to ketamine and its neural correlates in bipolar depression. J Affect Disord 2015; 172:307-11. [PMID: 25451430 PMCID: PMC4400209 DOI: 10.1016/j.jad.2014.09.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Accepted: 09/11/2014] [Indexed: 02/06/2023]
Abstract
BACKGROUND Shank3, a post-synaptic density protein involved in N-methyl-d-aspartate (NMDA) receptor tethering and dendritic spine rearrangement, is implicated in the pathophysiology of bipolar disorder. We hypothesized that elevated baseline plasma Shank3 levels might predict antidepressant response to the NMDA receptor antagonist ketamine. METHODS Twenty-nine subjects with bipolar depression received a double-blind, randomized, subanesthetic dose (.5 mg/kg) ketamine infusion. Of the patients for whom Shank3 levels were collected, 15 completed baseline 3-Tesla MRI and 17 completed post-ketamine [(18)F]-FDG PET. RESULTS Higher baseline Shank3 levels predicted antidepressant response at Days 1 (r=-.39, p=.047), 2 (r=-.45, p=.02), and 3 (r=-.42, p=.03) and were associated with larger average (r=.58, p=.02) and right amygdala volume (r=.65, p=.009). Greater baseline Shank3 also predicted increased glucose metabolism in the hippocampus (r=.51, p=.04) and amygdala (r=.58, p=.02). LIMITATIONS Limitations include the small sample size, inability to assess the source of peripheral Shank3, and the lack of a placebo group for baseline Shank3 levels and comparative structural/functional neuroimaging. CONCLUSIONS Shank3 is a potential biomarker of antidepressant response to ketamine that correlates with baseline amygdala volume and increased glucose metabolism in the amygdala and hippocampus.
Collapse
Affiliation(s)
- Robin Ortiz
- National Institute of Mental Health, Experimental Therapeutics and Pathophysiology Branch, Division of Intramural Research Programs, National Institutes of Health, Bethesda, MD, USA
| | - Mark J. Niciu
- National Institute of Mental Health, Experimental Therapeutics and Pathophysiology Branch, Division of Intramural Research Programs, National Institutes of Health, Bethesda, MD, USA
| | - Nada Lukkahati
- National Institute of Nursing Research, National Institutes of Health, Bethesda, MD, USA,School of Nursing, University of Nevada at Las Vegas, Las Vegas, NV, USA
| | - Leorey N. Saligan
- National Institute of Nursing Research, National Institutes of Health, Bethesda, MD, USA
| | - Allison C. Nugent
- National Institute of Mental Health, Experimental Therapeutics and Pathophysiology Branch, Division of Intramural Research Programs, National Institutes of Health, Bethesda, MD, USA
| | - David A. Luckenbaugh
- National Institute of Mental Health, Experimental Therapeutics and Pathophysiology Branch, Division of Intramural Research Programs, National Institutes of Health, Bethesda, MD, USA
| | - Rodrigo Machado-Vieira
- National Institute of Mental Health, Experimental Therapeutics and Pathophysiology Branch, Division of Intramural Research Programs, National Institutes of Health, Bethesda, MD, USA
| | - Carlos A. Zarate
- National Institute of Mental Health, Experimental Therapeutics and Pathophysiology Branch, Division of Intramural Research Programs, National Institutes of Health, Bethesda, MD, USA,Corresponding author Carlos A. Zarate Jr. M.D., National Institutes of Health/National Institute of Mental Health, Experimental Therapeutics & Pathophysiology Branch, Building 10/Clinical Research Center (CRC), 10 Center Dr., Room 7-5342, Bethesda, MD 20892, Phone: (301)-451-0861, Fax: (301)-480-8792,
| |
Collapse
|
19
|
Kim JH, Cheong HS, Sul JH, Seo JM, Kim DY, Oh JT, Park KW, Kim HY, Jung SM, Jung K, Cho MJ, Bae JS, Shin HD. A genome-wide association study identifies potential susceptibility loci for Hirschsprung disease. PLoS One 2014; 9:e110292. [PMID: 25310821 PMCID: PMC4195606 DOI: 10.1371/journal.pone.0110292] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Accepted: 09/11/2014] [Indexed: 12/30/2022] Open
Abstract
Hirschsprung disease (HSCR) is a congenital and heterogeneous disorder characterized by the absence of intramural nervous plexuses along variable lengths of the hindgut. Although RET is a well-established risk factor, a recent genome-wide association study (GWAS) of HSCR has identified NRG1 as an additional susceptibility locus. To discover additional risk loci, we performed a GWAS of 123 sporadic HSCR patients and 432 unaffected controls using a large-scale platform with coverage of over 1 million polymorphic markers. The result was that our study replicated the findings of RET-CSGALNACT2-RASGEF1A genomic region (rawP = 5.69×10−19 before a Bonferroni correction; corrP = 4.31×10−13 after a Bonferroni correction) and NRG1 as susceptibility loci. In addition, this study identified SLC6A20 (adjP = 2.71×10−6), RORA (adjP = 1.26×10−5), and ABCC9 (adjP = 1.86×10−5) as new potential susceptibility loci under adjusting the already known loci on the RET-CSGALNACT2-RASGEF1A and NRG1 regions, although none of the SNPs in these genes passed the Bonferroni correction. In further subgroup analysis, the RET-CSGALNACT2-RASGEF1A genomic region was observed to have different significance levels among subgroups: short-segment (S-HSCR, corrP = 1.71×10−5), long-segment (L-HSCR, corrP = 6.66×10−4), and total colonic aganglionosis (TCA, corrP>0.05). This differential pattern in the significance level suggests that other genomic loci or mechanisms may affect the length of aganglionosis in HSCR subgroups during enteric nervous system (ENS) development. Although functional evaluations are needed, our findings might facilitate improved understanding of the mechanisms of HSCR pathogenesis.
Collapse
Affiliation(s)
- Jeong-Hyun Kim
- Research Institute for Basic Science, Sogang University, Seoul, Republic of Korea; Department of Life Science, Sogang University, Seoul, Republic of Korea
| | - Hyun Sub Cheong
- Department of Genetic Epidemiology, SNP Genetics, Inc., Seoul, Republic of Korea
| | - Jae Hoon Sul
- Department of Computer Science, University of California Los Angeles, Los Angeles, California, United States of America
| | - Jeong-Meen Seo
- Division of Pediatric Surgery, Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Dae-Yeon Kim
- Department of Pediatric Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jung-Tak Oh
- Department of Pediatric Surgery, Severance Children's Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Kwi-Won Park
- Department of Pediatric Surgery, Seoul National University Children's Hospital, Seoul, Republic of Korea
| | - Hyun-Young Kim
- Department of Pediatric Surgery, Seoul National University Children's Hospital, Seoul, Republic of Korea
| | - Soo-Min Jung
- Division of Pediatric Surgery, Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Kyuwhan Jung
- Department of Surgery, Seoul National University Bundang Hospital, Seongnam, Gyeonggi, Republic of Korea
| | - Min Jeng Cho
- Department of Surgery, Konkuk University Medical Center, Seoul, Republic of Korea
| | - Joon Seol Bae
- Laboratory of Translational Genomics, Samsung Genome Institute, Samsung Medical Center, Seoul, Republic of Korea
| | - Hyoung Doo Shin
- Research Institute for Basic Science, Sogang University, Seoul, Republic of Korea; Department of Life Science, Sogang University, Seoul, Republic of Korea; Department of Genetic Epidemiology, SNP Genetics, Inc., Seoul, Republic of Korea
| |
Collapse
|
20
|
Chaudhury A. Molecular handoffs in nitrergic neurotransmission. Front Med (Lausanne) 2014; 1:8. [PMID: 25705621 PMCID: PMC4335390 DOI: 10.3389/fmed.2014.00008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 03/27/2014] [Indexed: 12/26/2022] Open
Abstract
Postsynaptic density (PSD) proteins in excitatory synapses are relatively immobile components, while there is a structured organization of mobile scaffolding proteins lying beneath the PSDs. For example, shank proteins are located further away from the membrane in the cytosolic faces of the PSDs, facing the actin cytoskeleton. The rationale of this organization may be related to important roles of these proteins as “exchange hubs” for the signaling proteins for their migration from the subcortical cytosol to the membrane. Notably, PSD95 have also been demonstrated in prejunctional nerve terminals of nitrergic neuronal varicosities traversing the gastrointestinal smooth muscles. It has been recently reported that motor proteins like myosin Va play important role in transcytosis of nNOS. In this review, the hypothesis is forwarded that nNOS delivered to subcortical cytoskeleton requires interactions with scaffolding proteins prior to docking at the membrane. This may involve significant role of “shank,” named for SRC-homology (SH3) and multiple ankyrin repeat domains, in nitric oxide synthesis. Dynein light chain LC8–nNOS from acto-myosin Va is possibly exchanged with shank, which thereafter facilitates transposition of nNOS for binding with palmitoyl-PSD95 at the nerve terminal membrane. Shank knockout mice, which present with features of autism spectrum disorders, may help delineate the role of shank in enteric nitrergic neuromuscular transmission. Deletion of shank3 in humans is a monogenic cause of autism called Phelan–McDermid syndrome. One fourth of these patients present with cyclical vomiting, which may be explained by junctionopathy resulting from shank deficit in enteric nitrergic nerve terminals.
Collapse
Affiliation(s)
- Arun Chaudhury
- Department of Surgery, Brigham and Women's Hospital, Harvard Medical School and VA Boston Healthcare System , Boston, MA , USA
| |
Collapse
|
21
|
Proepper C, Putz S, Russell R, Boeckers TM, Liebau S. The Kvβ2 subunit of voltage-gated potassium channels is interacting with ProSAP2/Shank3 in the PSD. Neuroscience 2013; 261:133-43. [PMID: 24211303 DOI: 10.1016/j.neuroscience.2013.10.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 10/21/2013] [Accepted: 10/22/2013] [Indexed: 01/18/2023]
Abstract
The postsynaptic density is an electron dense meshwork composed of a variety of molecules facilitating neuronal signal transmission. ProSAP2/Shank3 represents a crucial player at postsynaptic sites, assembling large multimeric platforms and anchoring numerous other molecules, thereby linking the functional synapse with the cytoskeleton. ProSAP2/Shank3 is also implicated in the pathogenesis of numerous diseases, including autism spectrum disorders. KvBeta2 (Kvβ2) on the other hand serves as a regulatory subunit of voltage-gated potassium channels. Kvβ2 is located at various sites in the neuron including the axon (binding to Kv1.2), the dendrites (binding to Kv4.2) and the synapse. Binding of Kvβ2 to either Kv1.2 or Kv4 modulates not only the channel conformation but directs targeting of the channel protein complex to distinct loci within the cell. Thus an interaction between ProSAP2 and Kvβ2 could have important roles at diverse cellular compartments and moreover during maturation stages. We report here on the direct protein-protein interaction of the postsynaptic density anchoring molecule ProSAP2 and the potassium channel subunit Kvβ2, initially identified in a yeast-two-hybrid-screen. Furthermore, we characterize this interaction at synapses using primary hippocampal neurons in vitro.
Collapse
Affiliation(s)
- C Proepper
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - S Putz
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - R Russell
- Department of Internal Medicine 1, Ulm University Hospital, Ulm, Germany
| | - T M Boeckers
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - S Liebau
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany; Institute of Neuroanatomy, University of Tuebingen, Tuebingen, Germany.
| |
Collapse
|
22
|
Hübsch M, Neuhuber WL, Raab M. Muscarinic acetylcholine receptors in the mouse esophagus: focus on intraganglionic laminar endings (IGLEs). Neurogastroenterol Motil 2013; 25:e560-73. [PMID: 23742744 DOI: 10.1111/nmo.12161] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 05/04/2013] [Indexed: 02/08/2023]
Abstract
BACKGROUND IGLEs represent the only low-threshold vagal mechanosensory terminals in the tunica muscularis of the esophagus. Previously, close relationships of vesicular glutamate transporter 2 (VGLUT2) immunopositive IGLEs and cholinergic varicosities suggestive for direct contacts were described in almost all mouse esophageal myenteric ganglia. Possible cholinergic influence on IGLEs requires specific acetylcholine receptors. In particular, the occurrence and location of neuronal muscarinic acetylcholine receptors (mAChR) in the esophagus were not yet characterized. METHODS This study aimed at specifying relationships of VGLUT2 immunopositive IGLEs and vesicular acetylcholine transporter (VAChT)-immunopositive varicosities using pre-embedding electron microscopy and the location of mAChR1-3 (M1-3) within esophagus and nodose ganglia using multilabel immunofluorescence and retrograde tracing. KEY RESULTS Electron microscopy confirmed synaptic contacts between cholinergic varicosities and IGLEs. M1- and M2-immunoreactivities (-iry; -iries) were colocalized with VGLUT2-iry in subpopulations of IGLEs. Retrograde Fast Blue tracing from the esophagus showed nodose ganglion neurons colocalizing tracer and M2-iry. M1-3-iries were detected in about 80% of myenteric ganglia and in about 67% of myenteric neurons. M1- and M2-iry were present in many fibers and varicosities within myenteric ganglia. Presynaptic M2-iry was detected in all, presynaptic M3-iry in one-fifth of motor endplates of striated esophageal muscles. M1-iry could not be detected in motor endplates of the esophagus, but in sternomastoid muscle. CONCLUSIONS & INFERENCES Acetylcholine probably released from varicosities of both extrinsic and intrinsic origin may influence a subpopulation of esophageal IGLEs via M2 and M1-receptors.
Collapse
Affiliation(s)
- M Hübsch
- Institute of Anatomy I, University of Erlangen-Nuremberg, Erlangen, Germany
| | | | | |
Collapse
|
23
|
Argyropoulos A, Gilby KL, Hill-Yardin EL. Studying autism in rodent models: reconciling endophenotypes with comorbidities. Front Hum Neurosci 2013; 7:417. [PMID: 23898259 PMCID: PMC3722572 DOI: 10.3389/fnhum.2013.00417] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Accepted: 07/12/2013] [Indexed: 12/19/2022] Open
Abstract
Autism spectrum disorder (ASD) patients commonly exhibit a variety of comorbid traits including seizures, anxiety, aggressive behavior, gastrointestinal problems, motor deficits, abnormal sensory processing, and sleep disturbances for which the cause is unknown. These features impact negatively on daily life and can exaggerate the effects of the core diagnostic traits (social communication deficits and repetitive behaviors). Studying endophenotypes relevant to both core and comorbid features of ASD in rodent models can provide insight into biological mechanisms underlying these disorders. Here we review the characterization of endophenotypes in a selection of environmental, genetic, and behavioral rodent models of ASD. In addition to exhibiting core ASD-like behaviors, each of these animal models display one or more endophenotypes relevant to comorbid features including altered sensory processing, seizure susceptibility, anxiety-like behavior, and disturbed motor functions, suggesting that these traits are indicators of altered biological pathways in ASD. However, the study of behaviors paralleling comorbid traits in animal models of ASD is an emerging field and further research is needed to assess altered gastrointestinal function, aggression, and disorders of sleep onset across models. Future studies should include investigation of these endophenotypes in order to advance our understanding of the etiology of this complex disorder.
Collapse
Affiliation(s)
- Andrew Argyropoulos
- Department of Medicine, The University of Melbourne , Parkville, VIC , Australia
| | | | | |
Collapse
|
24
|
Scaffold proteins at the postsynaptic density. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 970:29-61. [PMID: 22351050 DOI: 10.1007/978-3-7091-0932-8_2] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Scaffold proteins are abundant and essential components of the postsynaptic density (PSD). They play a major role in many synaptic functions including the trafficking, anchoring, and clustering of glutamate receptors and adhesion molecules. Moreover, they link postsynaptic receptors with their downstream signaling proteins and regulate the dynamics of cytoskeletal structures. By definition, PSD scaffold proteins do not have intrinsic enzymatic activities but are formed by modular and specific domains deputed to form large protein networks. Here, we will discuss the latest findings regarding the structure and functions of major PSD scaffold proteins. Given that scaffold proteins are central components of PSD architecture, it is not surprising that deletion or mutations in their human genes cause severe neuropsychiatric disorders including autism, mental retardation, and schizophrenia. Thus, their dynamic organization and regulation are directly correlated with the essential structure of the PSD and the normal physiology of neuronal synapses.
Collapse
|