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Munoz-Gualan AP, Güngör A, Cezayirli PC, Rahmanov S, Gurses ME, Puelles L, Türe U. Human Adapted Prosomeric Model: A Future for Brainstem Tumor Classification. Brain Res 2024; 1837:148961. [PMID: 38679312 DOI: 10.1016/j.brainres.2024.148961] [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: 12/12/2023] [Revised: 03/30/2024] [Accepted: 04/24/2024] [Indexed: 05/01/2024]
Abstract
This study reevaluates the conventional understanding of midbrain anatomy and neuroanatomical nomenclature in the context of recent genetic and anatomical discoveries. The authors assert that the midbrain should be viewed as an integral part of the forebrain due to shared genetic determinants and evolutionary lineage. The isthmo-mesencephalic boundary is recognized as a significant organizer for both the caudal midbrain and the isthmo-cerebellar area. The article adopts the prosomeric model, redefining the whole brain as neuromeres, offering a more precise depiction of brain development, including processes like proliferation, neurogenesis, cell migration, and differentiation. This shift in understanding challenges traditional definitions of the midbrain based on external brain morphology. The study also delves into the historical context of neuroanatomical models, including the columnar model proposed by Herrick in 1910, which has influenced our understanding of brain structure. Furthermore, the study has clinical implications, affecting neuroanatomy, neurodevelopmental studies, and the diagnosis and treatment of brain disorders. It emphasizes the need to integrate molecular research into human neuroanatomical studies and advocates for updating neuroanatomical terminology to reflect modern genetic and molecular insights. The authors propose two key revisions. First, we suggest reclassifying the isthmo-cerebellar prepontine region as part of the hindbrain, due to its role in cerebellar development and distinct location caudal to the genetically-defined midbrain. Second, we recommend redefining the anterior boundary of the genetically-defined midbrain to align with genetic markers. In conclusion, the authors highlight the importance of harmonizing neuroanatomical nomenclature with current scientific knowledge, promoting a more precise and informed understanding of brain structure, which is crucial for both research and clinical applications related to the human brain.
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Affiliation(s)
| | - Abuzer Güngör
- Department of Neurosurgery, Yeditepe University School of Medicine, Istanbul, Turkey; Department of Neurosurgery, Istinye University, Istanbul, Turkey
| | - Phillip Cem Cezayirli
- Department of Neurosurgery, Yeditepe University School of Medicine, Istanbul, Turkey; Haynes Neurosurgical Group, Birmingham, AL, United States
| | - Serdar Rahmanov
- Department of Neurosurgery, Yeditepe University School of Medicine, Istanbul, Turkey
| | - Muhammet Enes Gurses
- Department of Neurosurgery, Yeditepe University School of Medicine, Istanbul, Turkey; Department of Neurosurgery, Miller School of Medicine, University of Miami, Miami, FL, United States
| | - Luis Puelles
- Department of Human Anatomy and Psychobiology, School of Medicine, University of Murcia, Murcia, Spain; Institute of Biomedical Research of Murcia -IMIB, Virgen de la Arrixaca University Hospital, Murcia, Spain
| | - Uğur Türe
- Department of Neurosurgery, Yeditepe University School of Medicine, Istanbul, Turkey.
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2
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Wang Y, Liu W, Jiao Y, Yang Y, Shan D, Ji X, Zhang R, Zhan Z, Tang Y, Guo D, Yan C, Liu F. Advances in the Differentiation of hiPSCs into Cerebellar Neuronal Cells. Stem Cell Rev Rep 2024:10.1007/s12015-024-10763-x. [PMID: 39023738 DOI: 10.1007/s12015-024-10763-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/10/2024] [Indexed: 07/20/2024]
Abstract
The cerebellum has historically been primarily associated with the regulation of precise motor functions. However, recent findings suggest that it also plays a pivotal role in the development of advanced cognitive functions, including learning, memory, and emotion regulation. Pathological changes in the cerebellum, whether congenital hereditary or acquired degenerative, can result in a diverse spectrum of disorders, ranging from genetic spinocerebellar ataxias to psychiatric conditions such as autism, and schizophrenia. While studies in animal models have significantly contributed to our understanding of the genetic networks governing cerebellar development, it is important to note that the human cerebellum follows a protracted developmental timeline compared to the neocortex. Consequently, employing animal models to uncover human-specific molecular events in cerebellar development presents significant challenges. The emergence of human induced pluripotent stem cells (hiPSCs) has provided an invaluable tool for creating human-based culture systems, enabling the modeling and analysis of cerebellar physiology and pathology. hiPSCs and their differentiated progenies can be derived from patients with specific disorders or carrying distinct genetic variants. Importantly, they preserve the unique genetic signatures of the individuals from whom they originate, allowing for the elucidation of human-specific molecular and cellular processes involved in cerebellar development and related disorders. This review focuses on the technical advancements in the utilization of hiPSCs for the generation of both 2D cerebellar neuronal cells and 3D cerebellar organoids.
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Affiliation(s)
- Yingxin Wang
- Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
- Research Institute of Neuromuscular and Neurodegenerative Diseases, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
| | - Wenzhu Liu
- Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
- Research Institute of Neuromuscular and Neurodegenerative Diseases, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
| | - Yichang Jiao
- Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
- Research Institute of Neuromuscular and Neurodegenerative Diseases, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
| | - Yitong Yang
- School of Nursing, Jining Medical University, Jining, Shandong, 272067, China
| | - Didi Shan
- Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
- Research Institute of Neuromuscular and Neurodegenerative Diseases, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
| | - Xinbo Ji
- Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
- Research Institute of Neuromuscular and Neurodegenerative Diseases, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
| | - Rui Zhang
- Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
- Research Institute of Neuromuscular and Neurodegenerative Diseases, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
| | - Zexin Zhan
- Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
- Research Institute of Neuromuscular and Neurodegenerative Diseases, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
| | - Yao Tang
- Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
- Research Institute of Neuromuscular and Neurodegenerative Diseases, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
| | - Dandan Guo
- Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
- Research Institute of Neuromuscular and Neurodegenerative Diseases, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China
| | - Chuanzhu Yan
- Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China.
- Research Institute of Neuromuscular and Neurodegenerative Diseases, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China.
- Brain Science Research Institute, Shandong University, Jinan, Shandong, 250012, China.
- Mitochondrial Medicine Laboratory, Qilu Hospital (Qingdao), Shandong University, Qingdao, 266103, China.
| | - Fuchen Liu
- Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China.
- Research Institute of Neuromuscular and Neurodegenerative Diseases, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, Shandong, 250012, China.
- Brain Science Research Institute, Shandong University, Jinan, Shandong, 250012, China.
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3
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Bock M, Hong SJ, Zhang S, Yu Y, Lee S, Shin H, Choi BH, Han I. Morphogenetic Designs, and Disease Models in Central Nervous System Organoids. Int J Mol Sci 2024; 25:7750. [PMID: 39062993 PMCID: PMC11276855 DOI: 10.3390/ijms25147750] [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: 06/24/2024] [Revised: 07/11/2024] [Accepted: 07/12/2024] [Indexed: 07/28/2024] Open
Abstract
Since the emergence of the first cerebral organoid (CO) in 2013, advancements have transformed central nervous system (CNS) research. Initial efforts focused on studying the morphogenesis of COs and creating reproducible models. Numerous methodologies have been proposed, enabling the design of the brain organoid to represent specific regions and spinal cord structures. CNS organoids now facilitate the study of a wide range of CNS diseases, from infections to tumors, which were previously difficult to investigate. We summarize the major advancements in CNS organoids, concerning morphogenetic designs and disease models. We examine the development of fabrication procedures and how these advancements have enabled the generation of region-specific brain organoids and spinal cord models. We highlight the application of these organoids in studying various CNS diseases, demonstrating the versatility and potential of organoid models in advancing our understanding of complex conditions. We discuss the current challenges in the field, including issues related to reproducibility, scalability, and the accurate recapitulation of the in vivo environment. We provide an outlook on prospective studies and future directions. This review aims to provide a comprehensive overview of the state-of-the-art CNS organoid research, highlighting key developments, current challenges, and prospects in the field.
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Affiliation(s)
- Minsung Bock
- Department of Neurosurgery, CHA Bundang Medical Center, CHA University, Seongnam-si 13496, Republic of Korea; (M.B.); (S.Z.); (Y.Y.); (S.L.); (H.S.)
| | - Sung Jun Hong
- Research Competency Milestones Program, School of Medicine, CHA University, Seongnam-si 13488, Republic of Korea;
- Department of Medicine, School of Medicine, CHA University, Seongnam-si 13496, Republic of Korea
| | - Songzi Zhang
- Department of Neurosurgery, CHA Bundang Medical Center, CHA University, Seongnam-si 13496, Republic of Korea; (M.B.); (S.Z.); (Y.Y.); (S.L.); (H.S.)
| | - Yerin Yu
- Department of Neurosurgery, CHA Bundang Medical Center, CHA University, Seongnam-si 13496, Republic of Korea; (M.B.); (S.Z.); (Y.Y.); (S.L.); (H.S.)
| | - Somin Lee
- Department of Neurosurgery, CHA Bundang Medical Center, CHA University, Seongnam-si 13496, Republic of Korea; (M.B.); (S.Z.); (Y.Y.); (S.L.); (H.S.)
| | - Haeeun Shin
- Department of Neurosurgery, CHA Bundang Medical Center, CHA University, Seongnam-si 13496, Republic of Korea; (M.B.); (S.Z.); (Y.Y.); (S.L.); (H.S.)
| | - Byung Hyune Choi
- Department of Biomedical Science, Inha University College of Medicine, Incheon 22212, Republic of Korea;
| | - Inbo Han
- Department of Neurosurgery, CHA Bundang Medical Center, CHA University, Seongnam-si 13496, Republic of Korea; (M.B.); (S.Z.); (Y.Y.); (S.L.); (H.S.)
- Advanced Regenerative Medicine Research Center, CHA Future Medicine Research Institute, Seongnam-si 13488, Republic of Korea
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4
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Göbel C, Schoof M, Holdhof D, Spohn M, Schüller U. SMARCA4 Loss and Mutated β-Catenin Induce Proliferative Lesions in the Murine Embryonic Cerebellum. J Neurosci 2024; 44:e1605232024. [PMID: 38383496 PMCID: PMC11007475 DOI: 10.1523/jneurosci.1605-23.2024] [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: 08/24/2023] [Revised: 01/26/2024] [Accepted: 01/31/2024] [Indexed: 02/23/2024] Open
Abstract
Almost all medulloblastomas (MB) of the Wingless/Int-1 (WNT) type are characterized by hotspot mutations in CTNNB1, and mouse models have convincingly demonstrated the tumor-initiating role of these mutations. Additional alterations in SMARCA4 are detected in ∼20% of WNT MB, but their functional role is mostly unknown. We, therefore, amended previously described brain lipid binding protein (Blbp)-cre::Ctnnb1(ex3)fl/wt mice by the introduction of floxed Smarca4 alleles. Unexpectedly, mutated and thereby stabilized β-catenin on its own induced severe developmental phenotypes in male and female Blbp-cre::Ctnnb1(ex3)fl/wt mice in our hands, including a thinned cerebral cortex, hydrocephalus, missing cerebellar layering, and cell accumulations in the brainstem and cerebellum. An additional loss of SMARCA4 even resulted in prenatal death for most mice. Respective Blbp-cre::Ctnnb1(ex3)fl/wt::Smarca4fl/rec mutants (male and female) developed large proliferative lesions in the cerebellum evolving from E13.5 to E16.5. Histological and molecular analysis of these lesions by DNA methylation profiling and single-cell RNA sequencing suggested an origin in early undifferentiated SOX2-positive cerebellar progenitors. Furthermore, upregulated WNT signaling, altered actin/cytoskeleton organization, and reduced neuronal differentiation were evident in mutant cells. In vitro, cells harboring alterations in both Ctnnb1 and Smarca4 were negatively selected and did not show tumorigenic potential after transplantation in adult female recipient mice. However, in cerebellar explant cultures, mutant cells displayed significantly increased proliferation, suggesting an important role of the embryonic microenvironment in the development of lesions. Altogether, these results represent an important first step toward the unraveling of tumorigenic mechanisms induced by aberrant WNT signaling and SMARCA4 deficiency.
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Affiliation(s)
- Carolin Göbel
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg D-20251, Germany
- Research Institute Children's Cancer Center Hamburg, Hamburg D-20251, Germany
| | - Melanie Schoof
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg D-20251, Germany
- Research Institute Children's Cancer Center Hamburg, Hamburg D-20251, Germany
| | - Dörthe Holdhof
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg D-20251, Germany
- Research Institute Children's Cancer Center Hamburg, Hamburg D-20251, Germany
| | - Michael Spohn
- Research Institute Children's Cancer Center Hamburg, Hamburg D-20251, Germany
- Bioinformatics Core, University Medical Center Hamburg-Eppendorf, Hamburg D-20251, Germany
| | - Ulrich Schüller
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg D-20251, Germany
- Research Institute Children's Cancer Center Hamburg, Hamburg D-20251, Germany
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg D-20251, Germany
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5
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Offen N, Filatova A, Nuber UA. Enrichment of FGF8-expressing cells from neurally induced human pluripotent stem cell cultures. Stem Cell Reports 2023; 18:2240-2253. [PMID: 37922914 PMCID: PMC10679777 DOI: 10.1016/j.stemcr.2023.10.007] [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: 01/30/2023] [Revised: 10/05/2023] [Accepted: 10/09/2023] [Indexed: 11/07/2023] Open
Abstract
In early vertebrate development, organizer regions-groups of cells that signal to and thereby influence neighboring cells by secreted morphogens-play pivotal roles in the establishment and maintenance of cell identities within defined tissue territories. The midbrain-hindbrain organizer drives regionalization of neural tissue into midbrain and hindbrain territories with fibroblast growth factor 8 (FGF8) acting as a key morphogen. This organizer has been extensively studied in chicken, mouse, and zebrafish. Here, we demonstrate the enrichment of FGF8-expressing cells from human pluripotent stem cells (hPSCs), cultured as attached embryoid bodies using antibodies that recognize "Similar Expression to Fgf" (SEF) and Frizzled proteins. The arrangement of cells in embryoid body subsets of these cultures and the gene expression profile of the FGF8-expressing population show certain similarities to the midbrain-hindbrain organizer in animal models. In the embryonic chick brain, the enriched cell population induces formation of midbrain structures, consistent with FGF8-organizing capability.
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Affiliation(s)
- Nils Offen
- Stem Cell and Developmental Biology, Technical University of Darmstadt, 64287 Darmstadt, Germany
| | - Alina Filatova
- Stem Cell and Developmental Biology, Technical University of Darmstadt, 64287 Darmstadt, Germany
| | - Ulrike A Nuber
- Stem Cell and Developmental Biology, Technical University of Darmstadt, 64287 Darmstadt, Germany.
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Lobón-Iglesias MJ, Andrianteranagna M, Han ZY, Chauvin C, Masliah-Planchon J, Manriquez V, Tauziede-Espariat A, Turczynski S, Bouarich-Bourimi R, Frah M, Dufour C, Blauwblomme T, Cardoen L, Pierron G, Maillot L, Guillemot D, Reynaud S, Bourneix C, Pouponnot C, Surdez D, Bohec M, Baulande S, Delattre O, Piaggio E, Ayrault O, Waterfall JJ, Servant N, Beccaria K, Dangouloff-Ros V, Bourdeaut F. Imaging and multi-omics datasets converge to define different neural progenitor origins for ATRT-SHH subgroups. Nat Commun 2023; 14:6669. [PMID: 37863903 PMCID: PMC10589300 DOI: 10.1038/s41467-023-42371-7] [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: 06/10/2022] [Accepted: 10/09/2023] [Indexed: 10/22/2023] Open
Abstract
Atypical teratoid rhabdoid tumors (ATRT) are divided into MYC, TYR and SHH subgroups, suggesting diverse lineages of origin. Here, we investigate the imaging of human ATRT at diagnosis and the precise anatomic origin of brain tumors in the Rosa26-CreERT2::Smarcb1flox/flox model. This cross-species analysis points to an extra-cerebral origin for MYC tumors. Additionally, we clearly distinguish SHH ATRT emerging from the cerebellar anterior lobe (CAL) from those emerging from the basal ganglia (BG) and intra-ventricular (IV) regions. Molecular characteristics point to the midbrain-hindbrain boundary as the origin of CAL SHH ATRT, and to the ganglionic eminence as the origin of BG/IV SHH ATRT. Single-cell RNA sequencing on SHH ATRT supports these hypotheses. Trajectory analyses suggest that SMARCB1 loss induces a de-differentiation process mediated by repressors of the neuronal program such as REST, ID and the NOTCH pathway.
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Affiliation(s)
- María-Jesús Lobón-Iglesias
- INSERM U830, Laboratory of Translational Research In Pediatric Oncology, PSL Research University, SIREDO Oncology center, Institut Curie Research Center, Paris, France
| | - Mamy Andrianteranagna
- INSERM U830, Laboratory of Translational Research In Pediatric Oncology, PSL Research University, SIREDO Oncology center, Institut Curie Research Center, Paris, France
- INSERM U900, Bioinformatics, Biostatistics, Epidemiology and Computational Systems Unit, Institut Curie, Mines Paris Tech, PSL Research University, Institut Curie Research Center, Paris, France
| | - Zhi-Yan Han
- INSERM U830, Laboratory of Translational Research In Pediatric Oncology, PSL Research University, SIREDO Oncology center, Institut Curie Research Center, Paris, France
| | - Céline Chauvin
- INSERM U830, Laboratory of Translational Research In Pediatric Oncology, PSL Research University, SIREDO Oncology center, Institut Curie Research Center, Paris, France
| | - Julien Masliah-Planchon
- Somatic Genetic Unit, Department of Pathology and Diagnostic and Theranostic Medecine, Institut Curie Hospital, Paris, France
| | - Valeria Manriquez
- INSERM U932, Immunity and Cancer, PSL Research University, Institut Curie Research Center, Paris, France
| | - Arnault Tauziede-Espariat
- Department of Neuropathology, GHU Paris-Psychiatry and Neurosciences, Sainte-Anne Hospital, Paris, France
- Paris Psychiatry and Neurosciences Institute (IPNP), UMR S1266, INSERM, IMA-BRAIN, Paris, France
| | - Sandrina Turczynski
- INSERM U830, Laboratory of Translational Research In Pediatric Oncology, PSL Research University, SIREDO Oncology center, Institut Curie Research Center, Paris, France
| | - Rachida Bouarich-Bourimi
- INSERM U830, Laboratory of Translational Research In Pediatric Oncology, PSL Research University, SIREDO Oncology center, Institut Curie Research Center, Paris, France
| | - Magali Frah
- INSERM U830, Laboratory of Translational Research In Pediatric Oncology, PSL Research University, SIREDO Oncology center, Institut Curie Research Center, Paris, France
| | - Christelle Dufour
- Department of Children and Adolescents Oncology, Gustave Roussy, Paris Saclay University, Villejuif, France
| | - Thomas Blauwblomme
- Department of Pediatric Neurosurgery-AP-HP, Necker Sick Kids Hospital, Université de Paris, Paris, France
| | | | - Gaelle Pierron
- Somatic Genetic Unit, Department of Pathology and Diagnostic and Theranostic Medecine, Institut Curie Hospital, Paris, France
| | - Laetitia Maillot
- Somatic Genetic Unit, Department of Pathology and Diagnostic and Theranostic Medecine, Institut Curie Hospital, Paris, France
| | - Delphine Guillemot
- Somatic Genetic Unit, Department of Pathology and Diagnostic and Theranostic Medecine, Institut Curie Hospital, Paris, France
| | - Stéphanie Reynaud
- Somatic Genetic Unit, Department of Pathology and Diagnostic and Theranostic Medecine, Institut Curie Hospital, Paris, France
| | - Christine Bourneix
- Somatic Genetic Unit, Department of Pathology and Diagnostic and Theranostic Medecine, Institut Curie Hospital, Paris, France
| | - Célio Pouponnot
- CNRS UMR 3347, INSERM U1021, Institut Curie, PSL Research University, Université Paris-Saclay, Orsay, France
| | - Didier Surdez
- INSERM U830, Diversity and Plasticity of Childhood Tumors Lab, PSL Research University, SIREDO Oncology Center, Institut Curie Research Center, Paris, France
- Balgrist University Hospital, Faculty of Medicine, University of Zurich (UZH), Zurich, Switzerland
| | - Mylene Bohec
- Institut Curie, PSL University, Single Cell Initiative, ICGex Next-Generation Sequencing Platform, PSL University, 75005, Paris, France
| | - Sylvain Baulande
- Institut Curie, PSL University, Single Cell Initiative, ICGex Next-Generation Sequencing Platform, PSL University, 75005, Paris, France
| | - Olivier Delattre
- Somatic Genetic Unit, Department of Pathology and Diagnostic and Theranostic Medecine, Institut Curie Hospital, Paris, France
- INSERM U830, Diversity and Plasticity of Childhood Tumors Lab, PSL Research University, SIREDO Oncology Center, Institut Curie Research Center, Paris, France
| | - Eliane Piaggio
- INSERM U932, Immunity and Cancer, PSL Research University, Institut Curie Research Center, Paris, France
| | - Olivier Ayrault
- CNRS UMR 3347, INSERM U1021, Institut Curie, PSL Research University, Université Paris-Saclay, Orsay, France
| | - Joshua J Waterfall
- INSERM U830, Integrative Functional Genomics of Cancer Lab, PSL Research University, Institut Curie Research Center, Paris, France
- Department of Translational Research, PSL Research University, Institut Curie Research Center, Paris, France
| | - Nicolas Servant
- INSERM U900, Bioinformatics, Biostatistics, Epidemiology and Computational Systems Unit, Institut Curie, Mines Paris Tech, PSL Research University, Institut Curie Research Center, Paris, France
| | - Kevin Beccaria
- Department of Pediatric Neurosurgery-AP-HP, Necker Sick Kids Hospital, Université de Paris, Paris, France
| | - Volodia Dangouloff-Ros
- Pediatric Radiology Department, AP-HP, Necker Sick Kids Hospital and Paris Cite Universiy INSERM 1299 and UMR 1163, Institut Imagine, Paris, France
| | - Franck Bourdeaut
- INSERM U830, Laboratory of Translational Research In Pediatric Oncology, PSL Research University, SIREDO Oncology center, Institut Curie Research Center, Paris, France.
- Department of Pediatric Oncology, SIREDO Oncology Center, Institut Curie Hospital, Paris, and Université de Paris, Paris, France.
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7
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Lowenstein ED, Cui K, Hernandez-Miranda LR. Regulation of early cerebellar development. FEBS J 2023; 290:2786-2804. [PMID: 35262281 DOI: 10.1111/febs.16426] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/13/2022] [Accepted: 03/07/2022] [Indexed: 12/27/2022]
Abstract
The study of cerebellar development has been at the forefront of neuroscience since the pioneering work of Wilhelm His Sr., Santiago Ramón y Cajal and many others since the 19th century. They laid the foundation to identify the circuitry of the cerebellum, already revealing its stereotypic three-layered cortex and discerning several of its neuronal components. Their work was fundamental in the acceptance of the neuron doctrine, which acknowledges the key role of individual neurons in forming the basic units of the nervous system. Increasing evidence shows that the cerebellum performs a variety of homeostatic and higher order neuronal functions beyond the mere control of motor behaviour. Over the last three decades, many studies have revealed the molecular machinery that regulates distinct aspects of cerebellar development, from the establishment of a cerebellar anlage in the posterior brain to the identification of cerebellar neuron diversity at the single cell level. In this review, we focus on summarizing our current knowledge on early cerebellar development with a particular emphasis on the molecular determinants that secure neuron specification and contribute to the diversity of cerebellar neurons.
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Affiliation(s)
| | - Ke Cui
- Institut für Zell- and Neurobiologie, Charité Universitätsmedizin Berlin corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Germany
| | - Luis Rodrigo Hernandez-Miranda
- Institut für Zell- and Neurobiologie, Charité Universitätsmedizin Berlin corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Germany
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8
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Ciapponi C, Li Y, Osorio Becerra DA, Rodarie D, Casellato C, Mapelli L, D’Angelo E. Variations on the theme: focus on cerebellum and emotional processing. Front Syst Neurosci 2023; 17:1185752. [PMID: 37234065 PMCID: PMC10206087 DOI: 10.3389/fnsys.2023.1185752] [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: 03/13/2023] [Accepted: 04/18/2023] [Indexed: 05/27/2023] Open
Abstract
The cerebellum operates exploiting a complex modular organization and a unified computational algorithm adapted to different behavioral contexts. Recent observations suggest that the cerebellum is involved not just in motor but also in emotional and cognitive processing. It is therefore critical to identify the specific regional connectivity and microcircuit properties of the emotional cerebellum. Recent studies are highlighting the differential regional localization of genes, molecules, and synaptic mechanisms and microcircuit wiring. However, the impact of these regional differences is not fully understood and will require experimental investigation and computational modeling. This review focuses on the cellular and circuit underpinnings of the cerebellar role in emotion. And since emotion involves an integration of cognitive, somatomotor, and autonomic activity, we elaborate on the tradeoff between segregation and distribution of these three main functions in the cerebellum.
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Affiliation(s)
- Camilla Ciapponi
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
| | - Yuhe Li
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
| | | | - Dimitri Rodarie
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
- Centro Ricerche Enrico Fermi, Rome, Italy
| | - Claudia Casellato
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
| | - Lisa Mapelli
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
| | - Egidio D’Angelo
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
- Brain Connectivity Center, IRCCS Mondino Foundation, Pavia, Italy
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9
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Liu F, Li S, Zhao X, Xue S, Li H, Yang G, Li Y, Wu Y, Zhu L, Chen L, Wu H. O-GlcNAcylation Is Required for the Survival of Cerebellar Purkinje Cells by Inhibiting ROS Generation. Antioxidants (Basel) 2023; 12:antiox12040806. [PMID: 37107182 PMCID: PMC10135177 DOI: 10.3390/antiox12040806] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/21/2023] [Accepted: 03/24/2023] [Indexed: 03/29/2023] Open
Abstract
Purkinje cells (PCs), as a unique type of neurons output from the cerebellar cortex, are essential for the development and physiological function of the cerebellum. However, the intricate mechanisms underlying the maintenance of Purkinje cells are unclear. The O-GlcNAcylation (O-GlcNAc) of proteins is an emerging regulator of brain function that maintains normal development and neuronal circuity. In this study, we demonstrate that the O-GlcNAc transferase (OGT) in PCs maintains the survival of PCs. Furthermore, a loss of OGT in PCs induces severe ataxia, extensor rigidity and posture abnormalities in mice. Mechanistically, OGT regulates the survival of PCs by inhibiting the generation of intracellular reactive oxygen species (ROS). These data reveal a critical role of O-GlcNAc signaling in the survival and maintenance of cerebellar PCs.
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10
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Zanin JP, Friedman WJ. p75NTR prevents the onset of cerebellar granule cell migration via RhoA activation. eLife 2022; 11:e79934. [PMID: 36040414 PMCID: PMC9427104 DOI: 10.7554/elife.79934] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 08/07/2022] [Indexed: 12/20/2022] Open
Abstract
Neuronal migration is one of the fundamental processes during brain development. Several neurodevelopmental disorders can be traced back to dysregulated migration. Although substantial efforts have been placed in identifying molecular signals that stimulate migration, little is known about potential mechanisms that restrict migration. These restrictive mechanisms are essential for proper development since it helps coordinate the timing for each neuronal population to arrive and establish proper connections. Moreover, preventing migration away from a proliferative niche is necessary in maintaining a pool of proliferating cells until the proper number of neuronal progenitors is attained. Here, using mice and rats, we identify an anti-migratory role for the p75 neurotrophin receptor (p75NTR) in cerebellar development. Our results show that granule cell precursors (GCPs) robustly express p75NTR in the external granule layer (EGL) when they are proliferating during postnatal development, however, they do not express p75NTR when they migrate either from the rhombic lip during embryonic development or from the EGL during postnatal development. We show that p75NTR prevented GCP migration by maintaining elevated levels of active RhoA. The expression of p75NTR was sufficient to prevent the migration of the granule cells even in the presence of BDNF (brain-derived neurotrophic factor), a well-established chemotactic signal for this cell population. Our findings suggest that the expression of p75NTR might be a critical signal that stops and maintains the GCPs in the proliferative niche of the EGL, by promoting the clonal expansion of cerebellar granule neurons.
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Affiliation(s)
- Juan P Zanin
- Department of Biological Sciences, Rutgers UniversityNewarkUnited States
| | - Wilma J Friedman
- Department of Biological Sciences, Rutgers UniversityNewarkUnited States
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11
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Chang CY, Ting HC, Liu CA, Su HL, Chiou TW, Harn HJ, Lin SZ, Ho TJ. Differentiation of Human Pluripotent Stem Cells Into Specific Neural Lineages. Cell Transplant 2021; 30:9636897211017829. [PMID: 34665040 PMCID: PMC8529300 DOI: 10.1177/09636897211017829] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Human pluripotent stem cells (hPSCs) are sources of several somatic cell
types for human developmental studies, in vitro disease modeling, and
cell transplantation therapy. Improving strategies of derivation of
high-purity specific neural and glial lineages from hPSCs is critical
for application to the study and therapy of the nervous system. Here,
we will focus on the principles behind establishment of neuron and
glia differentiation methods according to developmental studies. We
will also highlight the limitations and challenges associated with the
differentiation of several “difficult” neural lineages and delay in
neuronal maturation and functional integration. To overcome these
challenges, we will introduce strategies and novel technologies aimed
at improving the differentiation of various neural lineages to expand
the application potential of hPSCs to the study of the nervous
system.
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Affiliation(s)
- Chia-Yu Chang
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan.,Department of Medical Research, Hualien Tzu Chi Hospital, Hualien, Taiwan.,Neuroscience Center, Hualien Tzu Chi Hospital, Hualien, Taiwan
| | - Hsiao-Chien Ting
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
| | - Ching-Ann Liu
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan.,Department of Medical Research, Hualien Tzu Chi Hospital, Hualien, Taiwan.,Neuroscience Center, Hualien Tzu Chi Hospital, Hualien, Taiwan
| | - Hong-Lin Su
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Tzyy-Wen Chiou
- Department of Life Science, National Dong Hwa University, Hualien, Taiwan
| | - Horng-Jyh Harn
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan.,Department of Pathology, Hualien Tzu Chi Hospital and Tzu Chi University, Hualien, Taiwan
| | - Shinn-Zong Lin
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan.,Department of Neurosurgery, Hualien Tzu Chi Hospital, Hualien, Taiwan
| | - Tsung-Jung Ho
- Department of Chinese Medicine, Hualien Tzu Chi Hospital, Hualien, Taiwan.,Integration Center of Traditional Chinese and Modern Medicine, Hualien Tzu Chi Hospital, Hualien, Taiwan.,School of Post-Baccalaureate Chinese Medicine, Tzu Chi University, Hualien, Taiwan
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12
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Reddy NC, Majidi SP, Kong L, Nemera M, Ferguson CJ, Moore M, Goncalves TM, Liu HK, Fitzpatrick JAJ, Zhao G, Yamada T, Bonni A, Gabel HW. CHARGE syndrome protein CHD7 regulates epigenomic activation of enhancers in granule cell precursors and gyrification of the cerebellum. Nat Commun 2021; 12:5702. [PMID: 34588434 PMCID: PMC8481233 DOI: 10.1038/s41467-021-25846-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 09/01/2021] [Indexed: 12/16/2022] Open
Abstract
Regulation of chromatin plays fundamental roles in the development of the brain. Haploinsufficiency of the chromatin remodeling enzyme CHD7 causes CHARGE syndrome, a genetic disorder that affects the development of the cerebellum. However, how CHD7 controls chromatin states in the cerebellum remains incompletely understood. Using conditional knockout of CHD7 in granule cell precursors in the mouse cerebellum, we find that CHD7 robustly promotes chromatin accessibility, active histone modifications, and RNA polymerase recruitment at enhancers. In vivo profiling of genome architecture reveals that CHD7 concordantly regulates epigenomic modifications associated with enhancer activation and gene expression of topologically-interacting genes. Genome and gene ontology studies show that CHD7-regulated enhancers are associated with genes that control brain tissue morphogenesis. Accordingly, conditional knockout of CHD7 triggers a striking phenotype of cerebellar polymicrogyria, which we have also found in a case of CHARGE syndrome. Finally, we uncover a CHD7-dependent switch in the preferred orientation of granule cell precursor division in the developing cerebellum, providing a potential cellular basis for the cerebellar polymicrogyria phenotype upon loss of CHD7. Collectively, our findings define epigenomic regulation by CHD7 in granule cell precursors and identify abnormal cerebellar patterning upon CHD7 depletion, with potential implications for our understanding of CHARGE syndrome. CHARGE syndrome that affects cerebellar development can be caused by haploinsufficiency of the chromatin remodeling enzyme CHD7; however the precise role of CHD7 remains unknown. Here the authors show CHD7 promotes chromatin accessibility and enhancer activity in granule cell precursors and regulates morphogenesis of the cerebellar cortex, where loss of CHD7 triggers cerebellar polymicrogyria.
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Affiliation(s)
- Naveen C Reddy
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Shahriyar P Majidi
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA.,MD-PhD Program, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Lingchun Kong
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Mati Nemera
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Cole J Ferguson
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Michael Moore
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Tassia M Goncalves
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Hai-Kun Liu
- Division of Molecular Neurogenetics, DKFZ-ZMBH Alliance, German Cancer Research Center Im Neunheimer Feld 280, 69120, Heidelberg, Germany
| | - James A J Fitzpatrick
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA.,Department of Cell Biology & Physiology, Washington University School of Medicine, St. Louis, MO, 63110, USA.,Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA.,Washington University Center for Cellular Imaging, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Guoyan Zhao
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Tomoko Yamada
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA.,Department of Neurobiology, Northwestern University, Evanston, IL, 60201, USA
| | - Azad Bonni
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA.
| | - Harrison W Gabel
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA.
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13
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Zhang T, Liu T, Hassan BA. Induction of granule and Purkinje cells from primary cultured mouse cerebellar progenitors. STAR Protoc 2021; 2:100760. [PMID: 34467229 PMCID: PMC8384916 DOI: 10.1016/j.xpro.2021.100760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The architecturally stereotypical structure of cerebellum is ideal for investigating the generation of neuronal diversity, but in vitro models for assessing early cerebellar progenitor differentiation were lacking. Here, we report a detailed protocol for long-term in vitro generation of Pax6+ granule cells and Calbindin+ Purkinje cells from common Sox2+ embryonic cerebellar progenitors. We describe the procedure for dissecting mouse cerebellar anlage, cell seeding, and tamoxifen-induced labeling of progenitor cells, followed by time-lapse video recording of clonal expansion and neuronal differentiation. For complete details on the use and execution of this protocol, please refer to Zhang et al. (2021).
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Affiliation(s)
- Tingting Zhang
- Institut du Cerveau – Paris Brain Institute – ICM, Sorbonne Université, Inserm, CNRS, Hôpital Pitié-Salpêtrière, Paris, France
- Doctoral School of Biomedical Sciences, KU Leuven, 3000 Leuven, Belgium
| | - Tengyuan Liu
- Institut du Cerveau – Paris Brain Institute – ICM, Sorbonne Université, Inserm, CNRS, Hôpital Pitié-Salpêtrière, Paris, France
- Doctoral School of Biomedical Sciences, KU Leuven, 3000 Leuven, Belgium
| | - Bassem A. Hassan
- Institut du Cerveau – Paris Brain Institute – ICM, Sorbonne Université, Inserm, CNRS, Hôpital Pitié-Salpêtrière, Paris, France
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14
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Wang F, Wang Q, Liu B, Mei L, Ma S, Wang S, Wang R, Zhang Y, Niu C, Xiong Z, Zheng Y, Zhang Z, Shi J, Song X. The long noncoding RNA Synage regulates synapse stability and neuronal function in the cerebellum. Cell Death Differ 2021; 28:2634-2650. [PMID: 33762741 PMCID: PMC8408218 DOI: 10.1038/s41418-021-00774-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 03/07/2021] [Accepted: 03/10/2021] [Indexed: 02/01/2023] Open
Abstract
The brain is known to express many long noncoding RNAs (lncRNAs); however, whether and how these lncRNAs function in modulating synaptic stability remains unclear. Here, we report a cerebellum highly expressed lncRNA, Synage, regulating synaptic stability via at least two mechanisms. One is through the function of Synage as a sponge for the microRNA miR-325-3p, to regulate expression of the known cerebellar synapse organizer Cbln1. The other function is to serve as a scaffold for organizing the assembly of the LRP1-HSP90AA1-PSD-95 complex in PF-PC synapses. Although somewhat divergent in its mature mRNA sequence, the locus encoding Synage is positioned adjacent to the Cbln1 loci in mouse, rhesus macaque, and human, and Synage is highly expressed in the cerebella of all three species. Synage deletion causes a full-spectrum cerebellar ablation phenotype that proceeds from cerebellar atrophy, through neuron loss, on to synapse density reduction, synaptic vesicle loss, and finally to a reduction in synaptic activity during cerebellar development; these deficits are accompanied by motor dysfunction in adult mice, which can be rescued by AAV-mediated Synage overexpression from birth. Thus, our study demonstrates roles for the lncRNA Synage in regulating synaptic stability and function during cerebellar development.
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Affiliation(s)
- Fei Wang
- grid.59053.3a0000000121679639Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Brain Function and Disease, School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui China
| | - Qianqian Wang
- grid.59053.3a0000000121679639Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Brain Function and Disease, School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui China
| | - Baowei Liu
- grid.59053.3a0000000121679639Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Brain Function and Disease, School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui China
| | - Lisheng Mei
- grid.59053.3a0000000121679639Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Brain Function and Disease, School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui China
| | - Sisi Ma
- grid.506261.60000 0001 0706 7839National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, CAMS and PUMC, Beijing, China
| | - Shujuan Wang
- grid.419611.a0000 0004 0457 9072State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China
| | - Ruoyu Wang
- grid.59053.3a0000000121679639Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Brain Function and Disease, School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui China ,grid.240145.60000 0001 2291 4776Graduate School of Biomedical Sciences, University of Texas MD Anderson Cancer Center and UTHealth, Houston, TX USA
| | - Yan Zhang
- grid.59053.3a0000000121679639Stroke Center & Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui China
| | - Chaoshi Niu
- grid.59053.3a0000000121679639Department of Neurosurgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui China
| | - Zhiqi Xiong
- grid.9227.e0000000119573309Institute of Neuroscience, State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China
| | - Yong Zheng
- grid.419611.a0000 0004 0457 9072State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China
| | - Zhi Zhang
- grid.59053.3a0000000121679639Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Brain Function and Disease, School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui China
| | - Juan Shi
- grid.506261.60000 0001 0706 7839National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, CAMS and PUMC, Beijing, China
| | - Xiaoyuan Song
- grid.59053.3a0000000121679639MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Brain Function and Disease, School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
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15
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Gao FJ, Klinedinst D, Fernandez FX, Cheng B, Savonenko A, Devenney B, Li Y, Wu D, Pomper MG, Reeves RH. Forebrain Shh overexpression improves cognitive function and locomotor hyperactivity in an aneuploid mouse model of Down syndrome and its euploid littermates. Acta Neuropathol Commun 2021; 9:137. [PMID: 34399854 PMCID: PMC8365939 DOI: 10.1186/s40478-021-01237-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 08/01/2021] [Indexed: 11/10/2022] Open
Abstract
Down syndrome (DS) is the leading genetic cause of intellectual disability and causes early-onset dementia and cerebellar hypoplasia. The prevalence of attention deficit hyperactivity disorder is elevated in children with DS. The aneuploid DS mouse model "Ts65Dn" shows prominent brain phenotypes, including learning and memory deficits, cerebellar hypoplasia, and locomotor hyperactivity. Previous studies indicate that impaired Sonic hedgehog (Shh) signaling contributes to neurological phenotypes associated with DS and neurodegenerative diseases. However, because of a lack of working inducible Shh knock-in mice, brain region-specific Shh overexpression and its effects on cognitive function have not been studied in vivo. Here, with Gli1-LacZ reporter mice, we demonstrated that Ts65Dn had reduced levels of Gli1, a sensitive readout of Shh signaling, in both hippocampus and cerebellum at postnatal day 6. Through site-specific transgenesis, we generated an inducible human Shh knock-in mouse, TRE-bi-hShh-Zsgreen1 (TRE-hShh), simultaneously expressing dually-lipidated Shh-Np and Zsgreen1 marker in the presence of transactivator (tTA). Double transgenic mice "Camk2a-tTA;TRE-hShh" and "Pcp2-tTA;TRE-hShh" induced Shh overexpression and activated Shh signaling in a forebrain and cerebellum, respectively, specific manner from the perinatal period. Camk2a-tTA;TRE-hShh normalized locomotor hyperactivity and improved learning and memory in 3-month-old Ts65Dn, mitigated early-onset severe cognitive impairment in 7-month-old Ts65Dn, and enhanced spatial cognition in euploid mice. Camk2a-tTA;TRE-hShh cohort maintained until 600days old showed that chronic overexpression of Shh in forebrain from the perinatal period had no effect on longevity of euploid or Ts65Dn. Pcp2-tTA;TRE-hShh did not affect cognition but mitigated the phenotype of cerebellar hypoplasia in Ts65Dn. Our study provides the first in vivo evidence that Shh overexpression from the perinatal period protects DS brain integrity and enhances learning and memory in normal mice, indicating the broad therapeutic potential of Shh ligand for other neurological conditions. Moreover, the first inducible hShh site-specific knock-in mouse could be widely used for spatiotemporal Shh signaling regulation.
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Affiliation(s)
- Feng J Gao
- Department of Physiology, Johns Hopkins University, Baltimore, MD, 21205, USA.
- Department of Genetic Medicine, John Hopkins University, Baltimore, MD, 21205, USA.
| | - Donna Klinedinst
- Department of Physiology, Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Fabian-Xosé Fernandez
- Department of Psychology, University of Arizona, Tucson, AZ, USA
- Department of Neurology, University of Arizona, Tucson, AZ, USA
- BIO5 and McKnight Brain Research Institutes, Tucson, AZ, USA
| | - Bei Cheng
- Department of Radiology, Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Alena Savonenko
- Department of Pathology and Neurology, John Hopkins University, Baltimore, MD, 21205, USA
| | - Benjamin Devenney
- Department of Physiology, Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Yicong Li
- Department of Physiology, Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Dan Wu
- Department of Biomedical Engineering, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Martin G Pomper
- Department of Radiology, Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Roger H Reeves
- Department of Physiology, Johns Hopkins University, Baltimore, MD, 21205, USA.
- Department of Genetic Medicine, John Hopkins University, Baltimore, MD, 21205, USA.
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16
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Hua T(T, Bejoy J, Song L, Wang Z, Zeng Z, Zhou Y, Li Y, Sang QXA. Cerebellar Differentiation from Human Stem Cells Through Retinoid, Wnt, and Sonic Hedgehog Pathways. Tissue Eng Part A 2021; 27:881-893. [PMID: 32873223 PMCID: PMC8336229 DOI: 10.1089/ten.tea.2020.0135] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 08/28/2020] [Indexed: 01/06/2023] Open
Abstract
Differentiating cerebellar organoids can be challenging due to complex cell organization and structure in the cerebellum. Different approaches were investigated to recapitulate differentiation process of the cerebellum from human-induced pluripotent stem cells (hiPSCs) without high efficiency. This study was carried out to test the hypothesis that the combination of different signaling factors including retinoic acid (RA), Wnt activator, and sonic hedgehog (SHH) activator promotes the cerebellar differentiation of hiPSCs. Wnt, RA, and SHH pathways were activated by CHIR99021 (CHIR), RA, and purmorphamine (PMR), respectively. Different combinations of the morphogens (RA/CHIR, RA/PMR, CHIR/PMR, and RA/CHIR/PMR) were utilized, and the spheroids (day 35) were characterized for the markers of three cerebellum layers (the molecular layer, the Purkinje cell layer, and the granule cell layer). Of all the combinations tested, RA/CHIR/PMR promoted both the Purkinje cell layer and the granule cell layer differentiation. The cells also exhibited electrophysiological characteristics using whole-cell patch clamp recording, especially demonstrating Purkinje cell electrophysiology. This study should advance the understanding of different signaling pathways during cerebellar development to engineer cerebellum organoids for drug screening and disease modeling. Impact statement This study investigated the synergistic effects of retinoic acid, Wnt activator, and sonic hedgehog activator on cerebellar patterning of human-induced pluripotent stem cell (hiPSC) spheroids and organoids. The results indicate that the combination promotes the differentiation of the Purkinje cell layer and the granule cell layer. The cells also exhibit electrophysiological characteristics using whole-cell patch clamp recording, especially demonstrating Purkinje cell electrophysiology. The findings are significant for understanding the biochemical signaling of three-dimensional microenvironment on neural patterning of hiPSCs for applications in organoid engineering, disease modeling, and drug screening.
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Affiliation(s)
- Thien (Timothy) Hua
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, USA
| | - Julie Bejoy
- Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, Florida, USA
| | - Liqing Song
- Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, Florida, USA
| | - Zhe Wang
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, USA
| | - Ziwei Zeng
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, USA
- Department of Colorectal Surgery, the Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Yi Zhou
- Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, Florida, USA
| | - Yan Li
- Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, Florida, USA
- Institute of Molecular Biophysics, Florida State University, Tallahassee, Florida, USA
| | - Qing-Xiang Amy Sang
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, USA
- Institute of Molecular Biophysics, Florida State University, Tallahassee, Florida, USA
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17
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Younes ST, Herrington B. In silico analysis identifies a putative cell-of-origin for BRAF fusion-positive cerebellar pilocytic astrocytoma. PLoS One 2020; 15:e0242521. [PMID: 33206716 PMCID: PMC7673500 DOI: 10.1371/journal.pone.0242521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 11/04/2020] [Indexed: 11/19/2022] Open
Abstract
Childhood cancers are increasingly recognized as disorders of cellular development. This study sought to identify the cellular and developmental origins of cerebellar pilocytic astrocytoma, the most common brain tumor of childhood. Using publicly available gene expression data from pilocytic astrocytoma tumors and controlling for driver mutation, a set of developmental-related genes which were overexpressed in cerebellar pilocytic astrocytoma was identified. These genes were then mapped onto several developmental atlases in order to identify normal cells with similar gene expression patterns and the developmental trajectory of those cells was interrogated. Eight known neuro-developmental genes were identified as being expressed in cerebellar pilocytic astrocytoma. Mapping those genes or their orthologs onto mouse neuro-developmental atlases identified overlap in their expression within the ventricular zone of the cerebellar anlage. Further analysis with a single cell RNA-sequencing atlas of the developing mouse cerebellum defined this overlap as occurring in ventricular zone progenitor cells at the division point between GABA-ergic neuronal and glial lineages, a developmental trajectory which closely mirrors that previously described to occur within pilocytic astrocytoma cells. Furthermore, ventricular zone progenitor cells and their progeny exhibited evidence of MAPK pathway activation, the paradigmatic oncogenic cascade known to be active in cerebellar pilocytic astrocytoma. Gene expression from developing human brain atlases recapitulated the same anatomic localizations and developmental trajectories as those found in mice. Taken together, these data suggest this population of ventricular zone progenitor cells as the cell-of-origin for BRAF fusion-positive cerebellar pilocytic astrocytoma.
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Affiliation(s)
- Subhi Talal Younes
- MD/PhD Program, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
| | - Betty Herrington
- Division of Pediatric Hematology/Oncology, Department of Pediatrics, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
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18
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Vijayalingam S, Ezekiel UR, Xu F, Subramanian T, Geerling E, Hoelscher B, San K, Ganapathy A, Pemberton K, Tycksen E, Pinto AK, Brien JD, Beck DB, Chung WK, Gurnett CA, Chinnadurai G. Human iPSC-Derived Neuronal Cells From CTBP1-Mutated Patients Reveal Altered Expression of Neurodevelopmental Gene Networks. Front Neurosci 2020; 14:562292. [PMID: 33192249 PMCID: PMC7653094 DOI: 10.3389/fnins.2020.562292] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 10/01/2020] [Indexed: 11/17/2022] Open
Abstract
A recurrent de novo mutation in the transcriptional corepressor CTBP1 is associated with neurodevelopmental disabilities in children (Beck et al., 2016, 2019; Sommerville et al., 2017). All reported patients harbor a single recurrent de novo heterozygous missense mutation (p.R342W) within the cofactor recruitment domain of CtBP1. To investigate the transcriptional activity of the pathogenic CTBP1 mutant allele in physiologically relevant human cell models, we generated induced pluripotent stem cells (iPSC) from the dermal fibroblasts derived from patients and normal donors. The transcriptional profiles of the iPSC-derived “early” neurons were determined by RNA-sequencing. Comparison of the RNA-seq data of the neurons from patients and normal donors revealed down regulation of gene networks involved in neurodevelopment, synaptic adhesion and anti-viral (interferon) response. Consistent with the altered gene expression patterns, the patient-derived neurons exhibited morphological and electrophysiological abnormalities, and susceptibility to viral infection. Taken together, our studies using iPSC-derived neuron models provide novel insights into the pathological activities of the CTBP1 p.R342W allele.
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Affiliation(s)
- S Vijayalingam
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, Edward A. Doisy Research Center, St. Louis, MO, United States
| | - Uthayashanker R Ezekiel
- Department of Clinical Health Sciences, Doisy College of Health Science, Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Fenglian Xu
- Department of Biology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University, St. Louis, MO, United States
| | - T Subramanian
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, Edward A. Doisy Research Center, St. Louis, MO, United States
| | - Elizabeth Geerling
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, Edward A. Doisy Research Center, St. Louis, MO, United States
| | - Brittany Hoelscher
- Department of Biology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University, St. Louis, MO, United States
| | - KayKay San
- Department of Clinical Health Sciences, Doisy College of Health Science, Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Aravinda Ganapathy
- Department of Clinical Health Sciences, Doisy College of Health Science, Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Kyle Pemberton
- Department of Biology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University, St. Louis, MO, United States
| | - Eric Tycksen
- McDonnell Genome Institute, Washington University School of Medicine, St. Louis, MO, United States
| | - Amelia K Pinto
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, Edward A. Doisy Research Center, St. Louis, MO, United States
| | - James D Brien
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, Edward A. Doisy Research Center, St. Louis, MO, United States
| | - David B Beck
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, United States
| | - Wendy K Chung
- Department of Pediatrics and Medicine, Columbia University Medical Center, New York, NY, United States
| | - Christina A Gurnett
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, United States
| | - G Chinnadurai
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, Edward A. Doisy Research Center, St. Louis, MO, United States
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19
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Macrì S, Di-Poï N. Heterochronic Developmental Shifts Underlying Squamate Cerebellar Diversity Unveil the Key Features of Amniote Cerebellogenesis. Front Cell Dev Biol 2020; 8:593377. [PMID: 33195265 PMCID: PMC7642464 DOI: 10.3389/fcell.2020.593377] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 09/25/2020] [Indexed: 11/13/2022] Open
Abstract
Despite a remarkable conservation of architecture and function, the cerebellum of vertebrates shows extensive variation in morphology, size, and foliation pattern. These features make this brain subdivision a powerful model to investigate the evolutionary developmental mechanisms underlying neuroanatomical complexity both within and between anamniote and amniote species. Here, we fill a major evolutionary gap by characterizing the developing cerebellum in two non-avian reptile species-bearded dragon lizard and African house snake-representative of extreme cerebellar morphologies and neuronal arrangement patterns found in squamates. Our data suggest that developmental strategies regarded as exclusive hallmark of birds and mammals, including transit amplification in an external granule layer (EGL) and Sonic hedgehog expression by underlying Purkinje cells (PCs), contribute to squamate cerebellogenesis independently from foliation pattern. Furthermore, direct comparison of our models suggests the key importance of spatiotemporal patterning and dynamic interaction between granule cells and PCs in defining cortical organization. Especially, the observed heterochronic shifts in early cerebellogenesis events, including upper rhombic lip progenitor activity and EGL maintenance, are strongly expected to affect the dynamics of molecular interaction between neuronal cell types in snakes. Altogether, these findings help clarifying some of the morphogenetic and molecular underpinnings of amniote cerebellar corticogenesis, but also suggest new potential molecular mechanisms underlying cerebellar complexity in squamates. Furthermore, squamate models analyzed here are revealed as key animal models to further understand mechanisms of brain organization.
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Affiliation(s)
- Simone Macrì
- Program in Developmental Biology, Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Nicolas Di-Poï
- Program in Developmental Biology, Institute of Biotechnology, University of Helsinki, Helsinki, Finland
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20
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Wilson AM, Schalek R, Suissa-Peleg A, Jones TR, Knowles-Barley S, Pfister H, Lichtman JW. Developmental Rewiring between Cerebellar Climbing Fibers and Purkinje Cells Begins with Positive Feedback Synapse Addition. Cell Rep 2020; 29:2849-2861.e6. [PMID: 31775050 PMCID: PMC6914268 DOI: 10.1016/j.celrep.2019.10.081] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 09/20/2019] [Accepted: 10/21/2019] [Indexed: 12/31/2022] Open
Abstract
During postnatal development, cerebellar climbing fibers alter their innervation strengths onto supernumerary Purkinje cell targets, generating a one-to-few connectivity pattern in adulthood. To get insight about the processes responsible for this remapping, we reconstructed serial electron microscopy datasets from mice during the first postnatal week. Between days 3 and 7, individual climbing fibers selectively add many synapses onto a subset of Purkinje targets in a positive-feedback manner, without pruning synapses from other targets. Active zone sizes of synapses associated with powerful versus weak inputs are indistinguishable. Changes in synapse number are thus the predominant form of early developmental plasticity. Finally, the numbers of climbing fibers and Purkinje cells in a local region nearly match. Initial over-innervation of Purkinje cells by climbing fibers is therefore economical: the number of axons entering a region is enough to assure that each ultimately retains a postsynaptic target and that none branched there in vain. Wilson et al. use electron microscopy to reveal that developmental rewiring in the cerebellum begins with significant synapse addition by climbing fibers onto a few preferred Purkinje cells. They also find that rewiring is economical: all climbing fibers initially entering a cerebellar region play a role in final connectivity there.
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Affiliation(s)
| | - Richard Schalek
- Center for Brain Science, Harvard University, Cambridge, MA 02138, USA
| | - Adi Suissa-Peleg
- Center for Brain Science, Harvard University, Cambridge, MA 02138, USA; School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | | | | | - Hanspeter Pfister
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Jeff William Lichtman
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA.
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21
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Investigating developmental and disease mechanisms of the cerebellum with pluripotent stem cells. Mol Cell Neurosci 2020; 107:103530. [PMID: 32693017 DOI: 10.1016/j.mcn.2020.103530] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 04/15/2020] [Accepted: 07/15/2020] [Indexed: 01/02/2023] Open
Abstract
The cerebellum is a brain region located in the dorsal part of the anterior hindbrain, composed of a highly stereotyped neural circuit structure with small sets of neurons. The cerebellum is involved in a wide variety of functions such as motor control, learning, cognition and others. Damage to the cerebellum often leads to impairments in motor skills (cerebellar ataxia). Cerebellar ataxia can occur as a result of neurodegenerative diseases such as spinocerebellar ataxia. Recent advances in technologies related to pluripotent stem cells and their neural differentiation has enabled researchers to investigate the mechanisms of development and of disease in the human brain. Here, we review recent applications of leading-edge stem cell technologies to the mechanistic investigation of human cerebellar development and neurological diseases affecting the cerebellum.
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22
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Li L, Fu F, Li R, Xiao W, Yu Q, Wang D, Jing X, Zhang Y, Yang X, Pan M, Liu Z, Liao C. Genetic tests aid in counseling of fetuses with cerebellar vermis defects. Prenat Diagn 2020; 40:1228-1238. [PMID: 32386258 DOI: 10.1002/pd.5732] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 05/06/2020] [Accepted: 05/06/2020] [Indexed: 12/19/2022]
Abstract
OBJECTIVE To assess the value of chromosome microarray analysis (CMA) and whole exome sequencing (WES) in fetuses with cerebellar vermis defects (CVD). METHODS From 2013 to 2019, we performed CMA on 43 fetuses with CVD, who were divided into cerebellar vermis hypoplasia (CVH) group and Dandy-Walker malformation (DWM) group according to morphological subtypes. Subsequently, WES was performed on 19 fetuses with normal CMA results to identify diagnostic genetic variants (DGVs). RESULTS Chromosome aneuploidies and clinically significant copy number variants were identified in 23.3% (10/43) of fetuses, and a significantly higher positive rate was found in fetuses with multiple compared with isolated malformations (36% vs 5.6%, P = .028). STAG2 genes related to Xq25 duplication syndrome was possibly a novel candidate gene for CVD. WES detected eight DGVs in seven genes among the 19 fetuses tested. Autosomal recessive ciliopathies (4/8) caused by TMEM231, CSPP1, and CEP290 mutations, were the most frequent monogenetic diseases, followed by Opitz GBBB syndrome (2/8) caused by MID1 and SPECC1L variants. CONCLUSION The combined use of CMA and WES has the potential to provide genetic diagnoses in 42% (18/43) of fetal CVD. WES should be offered when CMA results are normal.
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Affiliation(s)
- Lushan Li
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Fang Fu
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Ru Li
- Eugenic and Perinatal Institute, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Weiqiang Xiao
- Radiation department, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Qiuxia Yu
- Eugenic and Perinatal Institute, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Dan Wang
- Eugenic and Perinatal Institute, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Xiangyi Jing
- Eugenic and Perinatal Institute, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Yongning Zhang
- Eugenic and Perinatal Institute, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Xin Yang
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Min Pan
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Zequn Liu
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Can Liao
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
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23
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Ahmad F, Haque S, Ravinayagam V, Ahmad A, Kamli MR, Barreto GE, Ghulam Md Ashraf. Developmental lead (Pb)-induced deficits in redox and bioenergetic status of cerebellar synapses are ameliorated by ascorbate supplementation. Toxicology 2020; 440:152492. [PMID: 32407874 DOI: 10.1016/j.tox.2020.152492] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 04/08/2020] [Accepted: 05/07/2020] [Indexed: 10/24/2022]
Abstract
Neurotoxicity induced by exposure to heavy metal lead (Pb) is a concern of utmost importance particularly for countries with industrial-based economies. The developing brain is especially sensitive to exposure to even minute quantities of Pb which can alter neurodevelopmental trajectory with irreversible effects on motor, emotive-social and cognitive attributes even into later adulthood. Chemical synapses form the major pathway of inter-neuronal communications and are prime candidates for higher order brain (motor, memory and behavior) functions and determine the resistance/susceptibility for neurological disorders, including neuropsychopathologies. The synaptic pathways and mechanisms underlying Pb-mediated alterations in neuronal signaling and plasticity are not completely understood. Employing a biochemically isolated synaptosomal fraction which is enriched in synaptic terminals and synaptic mitochondria, this study aimed to analyze the alterations in bioenergetic and redox/antioxidant status of cerebellar synapses induced by developmental exposure to Pb (0.2 %). Moreover, we test the efficacy of vitamin C (ascorbate; 500 mg/kg body weight), a neuroprotective and neuromodulatory antioxidant, in mitigation of Pb-induced neuronal deficits. Our results implicate redox and bioenergetic disruptions as an underlying feature of the synaptic dysfunction observed in developmental Pb neurotoxicity, potentially contributing to consequent deficits in motor, behavioral and psychological attributes of the organisms. In addition, we establish ascorbate as a key ingredient for therapeutic approach against Pb induced neurotoxicity, particularly for early-life exposures.
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Affiliation(s)
- Faraz Ahmad
- Department of Anatomy, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand.
| | - Shafiul Haque
- Research and Scientific Studies Unit, College of Nursing & Allied Health Sciences, Jazan University, Jazan, 45142, Saudi Arabia
| | - Vijaya Ravinayagam
- Deanship of Scientific Research, Department of Nano-medicine Research, Institute for Research and Medical Consultations, Imam Abdulrahman Bin Faisal University, Dammam, 31441, Saudi Arabia
| | - Aqeel Ahmad
- Department of Medical Biochemistry, College of Medicine, Shaqra University, Shaqra, 11961, Saudi Arabia
| | - Majid Rasool Kamli
- Center of Excellence in Bionanoscience Research, King Abdulaziz University, Jeddah, 21589, Saudi Arabia; Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - George E Barreto
- Department of Biological Sciences, University of Limerick, Limerick, Ireland; Health Research Institute, University of Limerick, Limerick, Ireland
| | - Ghulam Md Ashraf
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
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24
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Biswas S, Cottarelli A, Agalliu D. Neuronal and glial regulation of CNS angiogenesis and barriergenesis. Development 2020; 147:dev182279. [PMID: 32358096 PMCID: PMC7197727 DOI: 10.1242/dev.182279] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Neurovascular pathologies of the central nervous system (CNS), which are associated with barrier dysfunction, are leading causes of death and disability. The roles that neuronal and glial progenitors and mature cells play in CNS angiogenesis and neurovascular barrier maturation have been elucidated in recent years. Yet how neuronal activity influences these processes remains largely unexplored. Here, we discuss our current understanding of how neuronal and glial development affects CNS angiogenesis and barriergenesis, and outline future directions to elucidate how neuronal activity might influence these processes. An understanding of these mechanisms is crucial for developing new interventions to treat neurovascular pathologies.
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Affiliation(s)
- Saptarshi Biswas
- Departments of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Azzurra Cottarelli
- Departments of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Dritan Agalliu
- Departments of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
- Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
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25
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Xiao R, Zhong H, Li X, Ma Y, Zhang R, Wang L, Zang Z, Fan X. Abnormal Cerebellar Development Is Involved in Dystonia-Like Behaviors and Motor Dysfunction of Autistic BTBR Mice. Front Cell Dev Biol 2020; 8:231. [PMID: 32318573 PMCID: PMC7154340 DOI: 10.3389/fcell.2020.00231] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 03/18/2020] [Indexed: 12/12/2022] Open
Abstract
Motor control and learning impairments are common complications in individuals with autism spectrum disorder (ASD). Abnormal cerebellar development during critical phases may disrupt these motor functions and lead to autistic motor dysfunction. However, the underlying mechanisms behind these impairments are not clear. Here, we utilized BTBR T+ Itprtf/J (BTBR) mice, an animal model of autism, to investigate the involvement of abnormal cerebellar development in motor performance. We found BTBR mice exhibited severe dystonia-like behavior and motor coordination or motor learning impairments. The onset of these abnormal movements coincided with the increased proliferation of granule neurons and enhanced foliation, and Purkinje cells displayed morphological hypotrophy with increased dendritic spine formation but suppressed maturation. The migration of granule neurons seemed unaffected. Transcriptional analyses confirmed the differential expression of genes involved in abnormal neurogenesis and revealed TRPC as a critical regulator in proliferation and synaptic formation. Taken together, these findings indicate that abnormal cerebellar development is closely related to dystonia-like behavior and motor dysfunction of BTBR mice and that TRPC may be a novel risk gene for ASD that may participate in the pathological process of autistic movement disorders.
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Affiliation(s)
- Rui Xiao
- Department of Military Cognitive Psychology, School of Psychology, Army Medical University, Chongqing, China
| | - Hongyu Zhong
- Department of Military Cognitive Psychology, School of Psychology, Army Medical University, Chongqing, China
| | - Xin Li
- Department of Military Cognitive Psychology, School of Psychology, Army Medical University, Chongqing, China
| | - Yuanyuan Ma
- Department of Military Cognitive Psychology, School of Psychology, Army Medical University, Chongqing, China.,Department of Basic Nursing, School of Nursing, Army Medical University, Chongqing, China
| | - Ruiyu Zhang
- Department of Military Cognitive Psychology, School of Psychology, Army Medical University, Chongqing, China
| | - Lian Wang
- Department of Military Cognitive Psychology, School of Psychology, Army Medical University, Chongqing, China
| | - Zhenle Zang
- Department of Military Cognitive Psychology, School of Psychology, Army Medical University, Chongqing, China
| | - Xiaotang Fan
- Department of Military Cognitive Psychology, School of Psychology, Army Medical University, Chongqing, China
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26
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Nam SM, Seo JS, Nahm SS, Chang BJ. Effects of ascorbic acid treatment on developmental alterations in calcium-binding proteins and gamma-aminobutyric acid transporter 1 in the cerebellum of lead-exposed rats during pregnancy and lactation. J Toxicol Sci 2020; 44:799-809. [PMID: 31708536 DOI: 10.2131/jts.44.799] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
In the present study, we investigated the effects of lead (Pb) and ascorbic acid co-administration on rat cerebellar development. Female rats were randomly divided into the following groups: control, Pb, and Pb plus ascorbic acid (PA) groups. From one week prior to mating, female rats were administered Pb (0.3% Pb acetate in drinking water) and ascorbic acid (100 mg/kg, oral intubation). The chemical administration was stopped on postnatal day 21 when the morphology of the offspring's cerebellum is similar to that of the adult brain. The blood Pb level was significantly increased following long-term Pb exposure. Ascorbic acid reduced Pb levels in the dams and offspring. Nissl staining demonstrated that the number of Purkinje cells was significantly reduced following Pb exposure, while ascorbic acid ameliorated this effect in the cerebellum of the offspring. Calcium-binding proteins, such as calbindin, calretinin, and parvalbumin were commonly expressed in Purkinje cells, and Pb exposure and ascorbic acid treatment resulted in similar patterns of change, namely Pb-induced impairment and ascorbic acid-mediated amelioration. The gamma-aminobutyric acid transporter 1 (GABAT1) is expressed in the pinceau structure where the somata of Purkinje cells are entwined in inhibitory synapses. The number of GABAT1-immunoreactive synapses was reduced following Pb exposure, and ascorbic acid co-treatment prevented this effect in the cerebellar cortex. Therefore, it can be concluded that ascorbic acid supplementation to mothers during gestation and lactation may have potential preventive effects against Pb-induced impairments in the developing cerebellum via protection of inhibitory neurons and synapses.
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Affiliation(s)
- Sung Min Nam
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, Korea.,College of Veterinary Medicine and Veterinary Science Research Institute, Konkuk University, Korea
| | - Jin Seok Seo
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, Korea
| | - Sang-Soep Nahm
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, Korea.,College of Veterinary Medicine and Veterinary Science Research Institute, Konkuk University, Korea
| | - Byung-Joon Chang
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, Korea.,College of Veterinary Medicine and Veterinary Science Research Institute, Konkuk University, Korea
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27
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Jackson TW, Bendfeldt GA, Beam KA, Rock KD, Belcher SM. Heterozygous mutation of sonic hedgehog receptor (Ptch1) drives cerebellar overgrowth and sex-specifically alters hippocampal and cortical layer structure, activity, and social behavior in female mice. Neurotoxicol Teratol 2020; 78:106866. [PMID: 32113901 DOI: 10.1016/j.ntt.2020.106866] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 02/12/2020] [Accepted: 02/21/2020] [Indexed: 02/07/2023]
Abstract
Sonic hedgehog (SHH) signaling is essential for the differentiation and migration of early stem cell populations during cerebellar development. Dysregulation of SHH-signaling can result in cerebellar overgrowth and the formation of the brain tumor medulloblastoma. Treatment for medulloblastoma is extremely aggressive and patients suffer life-long side effects including behavioral deficits. Considering that other behavioral disorders including autism spectrum disorders, holoprosencephaly, and basal cell nevus syndrome are known to present with cerebellar abnormalities, it is proposed that some behavioral abnormalities could be inherent to the medulloblastoma sequalae rather than treatment. Using a haploinsufficient SHH receptor knockout mouse model (Ptch1+/-), a partner preference task was used to explore activity, social behavior and neuroanatomical changes resulting from dysregulated SHH signaling. Compared to wild-type, Ptch1+/- females displayed increased activity by traveling a greater distance in both open-field and partner preference tasks. Social behavior was also sex-specifically modified in Ptch1+/- females that interacted more with both novel and familiar animals in the partner preference task compared to same-sex wild-type controls. Haploinsufficiency of PTCH1 resulted in cerebellar overgrowth in lobules IV/V and IX of both sexes, and female-specific decreases in hippocampal size and isocortical layer thickness. Taken together, neuroanatomical changes related to deficient SHH signaling may alter social behavior.
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Affiliation(s)
- Thomas W Jackson
- Center for Human Health and the Environment, Department of Biological Sciences, North Carolina State University, 127 David Clark Labs, Campus Box 7617, Raleigh, NS, USA.
| | - Gabriel A Bendfeldt
- Center for Human Health and the Environment, Department of Biological Sciences, North Carolina State University, 127 David Clark Labs, Campus Box 7617, Raleigh, NS, USA.
| | - Kelby A Beam
- Center for Human Health and the Environment, Department of Biological Sciences, North Carolina State University, 127 David Clark Labs, Campus Box 7617, Raleigh, NS, USA.
| | - Kylie D Rock
- Center for Human Health and the Environment, Department of Biological Sciences, North Carolina State University, 127 David Clark Labs, Campus Box 7617, Raleigh, NS, USA.
| | - Scott M Belcher
- Center for Human Health and the Environment, Department of Biological Sciences, North Carolina State University, 127 David Clark Labs, Campus Box 7617, Raleigh, NS, USA.
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28
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Devlin LA, Ramsbottom SA, Overman LM, Lisgo SN, Clowry G, Molinari E, Powell L, Miles CG, Sayer JA. Embryonic and foetal expression patterns of the ciliopathy gene CEP164. PLoS One 2020; 15:e0221914. [PMID: 31990917 PMCID: PMC6986751 DOI: 10.1371/journal.pone.0221914] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 01/03/2020] [Indexed: 01/20/2023] Open
Abstract
Nephronophthisis-related ciliopathies (NPHP-RC) are a group of inherited genetic disorders that share a defect in the formation, maintenance or functioning of the primary cilium complex, causing progressive cystic kidney disease and other clinical manifestations. Mutations in centrosomal protein 164 kDa (CEP164), also known as NPHP15, have been identified as a cause of NPHP-RC. Here we have utilised the MRC-Wellcome Trust Human Developmental Biology Resource (HDBR) to perform immunohistochemistry studies on human embryonic and foetal tissues to determine the expression patterns of CEP164 during development. Notably expression is widespread, yet defined, in multiple organs including the kidney, retina and cerebellum. Murine studies demonstrated an almost identical Cep164 expression pattern. Taken together, these data support a conserved role for CEP164 throughout the development of numerous organs, which, we suggest, accounts for the multi-system disease phenotype of CEP164-mediated NPHP-RC.
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Affiliation(s)
- L. A. Devlin
- Institute of Genetic Medicine, Newcastle University, Central Parkway, Newcastle upon Tyne, England, United Kingdom
| | - S. A. Ramsbottom
- Institute of Genetic Medicine, Newcastle University, Central Parkway, Newcastle upon Tyne, England, United Kingdom
| | - L. M. Overman
- MRC-Wellcome Trust Human Developmental Biology Resource, Institute of Genetic Medicine, International Centre for Life, Newcastle upon Tyne, England, United Kingdom
| | - S. N. Lisgo
- MRC-Wellcome Trust Human Developmental Biology Resource, Institute of Genetic Medicine, International Centre for Life, Newcastle upon Tyne, England, United Kingdom
| | - G. Clowry
- Institute of Neuroscience, The Medical School, Newcastle University, Framlington Place, Newcastle upon Tyne, England, United Kingdom
| | - E. Molinari
- Institute of Genetic Medicine, Newcastle University, Central Parkway, Newcastle upon Tyne, England, United Kingdom
| | - L. Powell
- Institute of Genetic Medicine, Newcastle University, Central Parkway, Newcastle upon Tyne, England, United Kingdom
| | - C. G. Miles
- Institute of Genetic Medicine, Newcastle University, Central Parkway, Newcastle upon Tyne, England, United Kingdom
| | - J. A. Sayer
- Institute of Genetic Medicine, Newcastle University, Central Parkway, Newcastle upon Tyne, England, United Kingdom
- The Newcastle upon Tyne Hospitals NHS Foundation Trust, Freeman Road, Newcastle upon Tyne, England, United Kingdom
- National Institute for Health Research Newcastle Biomedical Research Centre, Newcastle upon Tyne, England, United Kingdom
- * E-mail:
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29
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Močenić I, Kolić I, Nišević JR, Belančić A, Tratnik JS, Mazej D, Falnoga I, Vlašić-Cicvarić I, Štimac T, Špirić Z, Horvat M, Prpić I. Prenatal selenium status, neonatal cerebellum measures and child neurodevelopment at the age of 18 months. ENVIRONMENTAL RESEARCH 2019; 176:108529. [PMID: 31255949 DOI: 10.1016/j.envres.2019.108529] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 06/06/2019] [Accepted: 06/07/2019] [Indexed: 05/10/2023]
Abstract
OBJECTIVES The aim of this study was to evaluate the association of maternal blood selenium (Se) levels and cord blood Se levels with neonatal cerebellum measures and child neurodevelopment at the age of 18 months. Moreover, to investigate whether the neonatal cerebellum measures could be used as a potential biomarker for selenium homeostasis during pregnancy. STUDY GROUP AND METHODS The study population consisted of 205 mother-child pairs from Croatian Mother and Child Cohort. Maternal blood and cord blood were obtained at delivery and selenium level was analyzed by Inductively Coupled Plasma Mass Spectrometry. Cranial ultrasonography examination was performed on 49 newborns - cerebellum length and width have been measured. Neurodevelopmental assessment of cognitive, language and motor skills were conducted on 154 children, using The Bayley Scales of Infant and Toddler Development, Third Edition (BSID-III), at the age of 18 months. RESULTS The mean levels of selenium in maternal blood and cord blood were 92.6 ng/g and 97.0 ng/g, respectively. Maternal blood selenium levels were moderately and negatively correlated (r = -0.372; p = 0.008) with cerebellum length, while cord blood selenium levels were positively correlated with cerebellum width (r = 0.613; p = 0.007) among female children group. Maternal blood selenium levels were weakly and positively correlated (r = 0.176; p = 0.029) with child's cognitive abilities. CONCLUSION To the best of our knowledge, our study is the first one investigating the association between neonatal brain measures and selenium levels in mother-child pairs. Our results indicate that prenatal selenium intake correlated with cerebellum length and width measured by cranial ultrasonography. Hence, cerebellum may be used as a potential biomarker and a target "organ" for early detection of possible adverse effects of prenatal status to various micronutrients.
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Affiliation(s)
- Ivona Močenić
- Department of Pediatrics, General Hospital Pula, Zagrebačka 30, 52100, Pula, Croatia
| | - Ivana Kolić
- University Hospital Centre Rijeka, Department of Pediatrics, Istarska 43, 51000, Rijeka, Croatia
| | - Jelena Radić Nišević
- University Hospital Centre Rijeka, Department of Pediatrics, Istarska 43, 51000, Rijeka, Croatia; University of Rijeka, Faculty of Medicine, Braće Branchetta 20, 51000, Rijeka, Croatia
| | - Andrej Belančić
- University of Rijeka, Faculty of Medicine, Braće Branchetta 20, 51000, Rijeka, Croatia
| | - Janja Snoj Tratnik
- Institute "Jožef Stefan", Department of Environmental Sciences, Jamova 39, 1000, Ljubljana, Slovenia
| | - Darja Mazej
- Institute "Jožef Stefan", Department of Environmental Sciences, Jamova 39, 1000, Ljubljana, Slovenia
| | - Ingrid Falnoga
- Institute "Jožef Stefan", Department of Environmental Sciences, Jamova 39, 1000, Ljubljana, Slovenia
| | - Inge Vlašić-Cicvarić
- University Hospital Centre Rijeka, Centre for Clinical, Health and Organizational Psychology, Istarska 43, 51000, Rijeka, Croatia
| | - Tea Štimac
- University of Rijeka, Faculty of Medicine, Braće Branchetta 20, 51000, Rijeka, Croatia; University Hospital Centre Rijeka, Department of Gynecology and Obstetrics, Krešimirova 42, 51000, Rijeka, Croatia
| | - Zdravko Špirić
- University of Rijeka, Faculty of Medicine, Braće Branchetta 20, 51000, Rijeka, Croatia; Green Infrastructure Ltd., Fallerovo šetalište 22, 10000, Zagreb, Croatia
| | - Milena Horvat
- Institute "Jožef Stefan", Department of Environmental Sciences, Jamova 39, 1000, Ljubljana, Slovenia
| | - Igor Prpić
- University Hospital Centre Rijeka, Department of Pediatrics, Istarska 43, 51000, Rijeka, Croatia; University of Rijeka, Faculty of Medicine, Braće Branchetta 20, 51000, Rijeka, Croatia; Corresponding author. University Hospital Centre Rijeka, Department of Pediatrics, Istarska 43, 51000, Rijeka, Croatia.
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Nam SM, Seo JS, Go TH, Nahm SS, Chang BJ. Ascorbic Acid Supplementation Prevents the Detrimental Effects of Prenatal and Postnatal Lead Exposure on the Purkinje Cell and Related Proteins in the Cerebellum of Developing Rats. Biol Trace Elem Res 2019; 190:446-456. [PMID: 30488169 DOI: 10.1007/s12011-018-1572-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 11/07/2018] [Indexed: 02/06/2023]
Abstract
We investigated the effects of lead (Pb) and ascorbic acid co-administration on rat cerebellar development. Prior to mating, rats were randomly divided into control, Pb, and Pb plus ascorbic acid (PA) groups. Pregnant rats were administered Pb in drinking water (0.3% Pb acetate), and ascorbic acid (100 mg/kg) via oral intubation until the end of the experiment. Offspring were sacrificed at postnatal day 21, the age at which the morphology of the cerebellar cortex in developing pups is similar to that of the adult brain. In the cerebellum, Pb exposure significantly reduced Purkinje cells and ascorbic acid prevented their reduction. Along with the change of the Purkinje cells, long-term Pb exposure significantly reduced the expression of the synaptic marker (synaptophysin), γ-aminobutyric acid (GABA)-synthesizing enzyme (glutamic acid decarboxylase 67), and axonal myelin basic protein while ascorbic acid co-treatment attenuated Pb-mediated reduction of these proteins in the cerebellum of pups. However, glutamatergic N-methyl-D-aspartate receptor subtype 1 (NMDAR1), anchoring postsynaptic density protein 95 (PSD95), and antioxidant superoxide dismutases (SODs) were adversely changed; Pb exposure increased the expression of NMDAR1, PSD95, and SODs while ascorbic acid co-administration attenuated Pb-mediated induction. Although further studies are required about the neurotoxicity of the Pb exposure, the results presented here suggest that developmental Pb exposure disrupted normal development of Purkinje cells by increasing glutamatergic and oxidative stress in the cerebellum. Additionally, ascorbic acid co-treatment is beneficial in attenuating prenatal and postnatal Pb exposure-induced maldevelopment of Purkinje cells in the developing cerebellum.
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Affiliation(s)
- Sung Min Nam
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05030, Republic of Korea
- College of Veterinary Medicine and Veterinary Science Research Institute, Konkuk University, Seoul, 05030, Republic of Korea
| | - Jin Seok Seo
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05030, Republic of Korea
| | - Tae-Hun Go
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05030, Republic of Korea
| | - Sang-Soep Nahm
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05030, Republic of Korea
- College of Veterinary Medicine and Veterinary Science Research Institute, Konkuk University, Seoul, 05030, Republic of Korea
| | - Byung-Joon Chang
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05030, Republic of Korea.
- College of Veterinary Medicine and Veterinary Science Research Institute, Konkuk University, Seoul, 05030, Republic of Korea.
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López JM, Morona R, Moreno N, Lozano D, Jiménez S, González A. Pax6 expression highlights regional organization in the adult brain of lungfishes, the closest living relatives of land vertebrates. J Comp Neurol 2019; 528:135-159. [PMID: 31299095 DOI: 10.1002/cne.24744] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 06/27/2019] [Accepted: 07/05/2019] [Indexed: 12/15/2022]
Abstract
The Pax6 gene encodes a regulatory transcription factor that is key in brain development. The molecular structure of Pax6, the roles it plays and its patterns of expression in the brain have been highly conserved during vertebrate evolution. As neurodevelopment proceeds, the Pax6 expression changes from the mitotic germinal zone in the ventricular zone to become distributed in cell groups in the adult brain. Studies in various vertebrates, from fish to mammals, found that the Pax6 expression is maintained in adults in most regions that express it during development. Specifically, in amphibians, Pax6 is widely expressed in the adult brain and its distribution pattern serves to highlight regional organization of the brain. In the present study, we analyzed the detailed distribution of Pax6 cells in the adult central nervous system of lungfishes, the closest living relatives of all tetrapods. Immunohistochemistry performed using double labeling techniques with several neuronal markers of known distribution patterns served to evaluate the actual location of Pax6 cells. Our results show that the Pax6 expression is maintained in the adult brain of lungfishes, in distinct regions of the telencephalon (pallium and subpallium), diencephalon, mesencephalon, hindbrain, spinal cord, and retina. The pattern of Pax6 expression is largely shared with amphibians and helps to understand the primitive condition that would have characterized the common ancestors to all sarcopterygians (lobe-finned fishes and tetrapods), in which Pax6 would be needed to maintain specific entities of subpopulations of neurons.
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Affiliation(s)
- Jesús M López
- Department of Cell Biology, Faculty of Biology, University Complutense of Madrid, Madrid, Spain
| | - Ruth Morona
- Department of Cell Biology, Faculty of Biology, University Complutense of Madrid, Madrid, Spain
| | - Nerea Moreno
- Department of Cell Biology, Faculty of Biology, University Complutense of Madrid, Madrid, Spain
| | - Daniel Lozano
- Department of Cell Biology, Faculty of Biology, University Complutense of Madrid, Madrid, Spain
| | - Sara Jiménez
- Department of Cell Biology, Faculty of Biology, University Complutense of Madrid, Madrid, Spain
| | - Agustín González
- Department of Cell Biology, Faculty of Biology, University Complutense of Madrid, Madrid, Spain
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Muguruma K. Self-Organized Cerebellar Tissue from Human Pluripotent Stem Cells and Disease Modeling with Patient-Derived iPSCs. THE CEREBELLUM 2019; 17:37-41. [PMID: 29196977 DOI: 10.1007/s12311-017-0905-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Recent advances in the techniques that differentiate induced pluripotent stem cells (iPSCs) into specific types of cells enabled us to establish in vitro cell-based models as a platform for drug discovery. iPSC-derived disease models are advantageous to generation of a large number of cells required for high-throughput screening. Furthermore, disease-relevant cells differentiated from patient-derived iPSCs are expected to recapitulate the disorder-specific pathogenesis and physiology in vitro. Such disease-relevant cells will be useful for developing effective therapies. We demonstrated that cerebellar tissues are generated from human PSCs (hPSCs) in 3D culture systems that recapitulate the in vivo microenvironments associated with the isthmic organizer. Recently, we have succeeded in generation of spinocerebellar ataxia (SCA) patient-derived Purkinje cells by combining the iPSC technology and the self-organizing stem cell 3D culture technology. We demonstrated that SCA6-derived Purkinje cells exhibit vulnerability to triiodothyronine depletion, which is suppressed by treatment with thyrotropin-releasing hormone and Riluzole. We further discuss applications of patient-specific iPSCs to intractable cerebellar disease.
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Affiliation(s)
- Keiko Muguruma
- Laboratory for Cell Asymmetry, RIKEN Center for Developmental Biology, 2-2-3 Minatojima-minamimachi, Chuo Kobe, 650-0047, Japan.
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Gano D, Barkovich AJ. Cerebellar hypoplasia of prematurity: Causes and consequences. HANDBOOK OF CLINICAL NEUROLOGY 2019; 162:201-216. [PMID: 31324311 DOI: 10.1016/b978-0-444-64029-1.00009-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
As magnetic resonance imaging has been increasingly used to study brain injury and brain development in premature newborns, the prevalence of cerebellar abnormalities is increasingly recognized. The preterm cerebellum is highly vulnerable to a number of insults during its critical phase of growth and development throughout the period of prematurity and beyond. Direct cerebellar injury and additional factors such as supratentorial brain injury and glucocorticoid exposure adversely impact cerebellar growth and, consequently, increase the risk of neurodevelopmental disabilities. In this chapter the causes and consequences of cerebellar hypoplasia of prematurity are reviewed.
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Affiliation(s)
- Dawn Gano
- Department of Neurology, University of California, San Francisco, CA, United States.
| | - A James Barkovich
- Department of Radiology, University of California, San Francisco, CA, United States
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Fraser J, Essebier A, Brown AS, Davila RA, Sengar AS, Tu Y, Ensbey KS, Day BW, Scott MP, Gronostajski RM, Wainwright BJ, Boden M, Harvey TJ, Piper M. Granule neuron precursor cell proliferation is regulated by NFIX and intersectin 1 during postnatal cerebellar development. Brain Struct Funct 2018; 224:811-827. [PMID: 30511336 DOI: 10.1007/s00429-018-1801-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 11/24/2018] [Indexed: 01/06/2023]
Abstract
Cerebellar granule neurons are the most numerous neuronal subtype in the central nervous system. Within the developing cerebellum, these neurons are derived from a population of progenitor cells found within the external granule layer of the cerebellar anlage, namely the cerebellar granule neuron precursors (GNPs). The timely proliferation and differentiation of these precursor cells, which, in rodents occurs predominantly in the postnatal period, is tightly controlled to ensure the normal morphogenesis of the cerebellum. Despite this, our understanding of the factors mediating how GNP differentiation is controlled remains limited. Here, we reveal that the transcription factor nuclear factor I X (NFIX) plays an important role in this process. Mice lacking Nfix exhibit reduced numbers of GNPs during early postnatal development, but elevated numbers of these cells at postnatal day 15. Moreover, Nfix-/- GNPs exhibit increased proliferation when cultured in vitro, suggestive of a role for NFIX in promoting GNP differentiation. At a mechanistic level, profiling analyses using both ChIP-seq and RNA-seq identified the actin-associated factor intersectin 1 as a downstream target of NFIX during cerebellar development. In support of this, mice lacking intersectin 1 also displayed delayed GNP differentiation. Collectively, these findings highlight a key role for NFIX and intersectin 1 in the regulation of cerebellar development.
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Affiliation(s)
- James Fraser
- The School of Biomedical Sciences, The University of Queensland, Brisbane, 4072, Australia
| | - Alexandra Essebier
- The School of Chemistry and Molecular Bioscience, The University of Queensland, Brisbane, 4072, Australia
| | - Alexander S Brown
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Raul Ayala Davila
- The School of Biomedical Sciences, The University of Queensland, Brisbane, 4072, Australia
| | - Ameet S Sengar
- Program in Neurosciences & Mental Health, The Hospital for Sick Children, Toronto, M5G 0A8, Canada
| | - YuShan Tu
- Program in Neurosciences & Mental Health, The Hospital for Sick Children, Toronto, M5G 0A8, Canada
| | - Kathleen S Ensbey
- Cell and Molecular Biology Department, Translational Brain Cancer Research Laboratory, QIMR Berghofer MRI, Brisbane, QLD, 4006, Australia
| | - Bryan W Day
- Cell and Molecular Biology Department, Translational Brain Cancer Research Laboratory, QIMR Berghofer MRI, Brisbane, QLD, 4006, Australia
| | - Matthew P Scott
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Richard M Gronostajski
- Department of Biochemistry, Program in Genetics, Genomics and Bioinformatics, Center of Excellence in Bioinformatics and Life Sciences, State University of New York at Buffalo, Buffalo, NY, USA
| | - Brandon J Wainwright
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, 4072, Australia
| | - Mikael Boden
- The School of Chemistry and Molecular Bioscience, The University of Queensland, Brisbane, 4072, Australia
| | - Tracey J Harvey
- The School of Biomedical Sciences, The University of Queensland, Brisbane, 4072, Australia.
| | - Michael Piper
- The School of Biomedical Sciences, The University of Queensland, Brisbane, 4072, Australia. .,Queensland Brain Institute, The University of Queensland, Brisbane, 4072, Australia.
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Feng W, Herbst L, Lichter P, Pfister SM, Liu HK, Kawauchi D. CRISPR-mediated Loss of Function Analysis in Cerebellar Granule Cells Using In Utero Electroporation-based Gene Transfer. J Vis Exp 2018. [PMID: 29939173 DOI: 10.3791/57311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Brain malformation is often caused by genetic mutations. Deciphering the mutations in patient-derived tissues has identified potential causative factors of the diseases. To validate the contribution of a dysfunction of the mutated genes to disease development, the generation of animal models carrying the mutations is one obvious approach. While germline genetically engineered mouse models (GEMMs) are popular biological tools and exhibit reproducible results, it is restricted by time and costs. Meanwhile, non-germline GEMMs often enable exploring gene function in a more feasible manner. Since some brain diseases (e.g., brain tumors) appear to result from somatic but not germline mutations, non-germline chimeric mouse models, in which normal and abnormal cells coexist, could be helpful for disease-relevant analysis. In this study, we report a method for the induction of CRISPR-mediated somatic mutations in the cerebellum. Specifically, we utilized conditional knock-in mice, in which Cas9 and GFP are chronically activated by the CAG (CMV enhancer/chicken ß-actin) promoter after Cre-mediated recombination of the genome. The self-designed single-guide RNAs (sgRNAs) and the Cre recombinase sequence, both encoded in a single plasmid construct, were delivered into cerebellar stem/progenitor cells at an embryonic stage using in utero electroporation. Consequently, transfected cells and their daughter cells were labeled with green fluorescent protein (GFP), thus facilitating further phenotypic analyses. Hence, this method is not only showing electroporation-based gene delivery into embryonic cerebellar cells but also proposing a novel quantitative approach to assess CRISPR-mediated loss-of-function phenotypes.
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Affiliation(s)
- Weijun Feng
- Division of Molecular Neurogenetics, German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance
| | - Lena Herbst
- Division of Molecular Genetics, German Cancer Research Center (DKFZ), and German Cancer Consortium (DKTK)
| | - Peter Lichter
- Division of Molecular Genetics, German Cancer Research Center (DKFZ), and German Cancer Consortium (DKTK)
| | - Stefan M Pfister
- Hopp-Children's Cancer Center at the NCT Heidelberg (KiTZ); Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ), and German Cancer Consortium (DKTK); Department of Pediatric Hematology and Oncology, Heidelberg University Hospital
| | - Hai-Kun Liu
- Division of Molecular Neurogenetics, German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance
| | - Daisuke Kawauchi
- Hopp-Children's Cancer Center at the NCT Heidelberg (KiTZ); Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ), and German Cancer Consortium (DKTK);
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Cerrato V, Mercurio S, Leto K, Fucà E, Hoxha E, Bottes S, Pagin M, Milanese M, Ngan CY, Concina G, Ottolenghi S, Wei CL, Bonanno G, Pavesi G, Tempia F, Buffo A, Nicolis SK. Sox2 conditional mutation in mouse causes ataxic symptoms, cerebellar vermis hypoplasia, and postnatal defects of Bergmann glia. Glia 2018; 66:1929-1946. [PMID: 29732603 DOI: 10.1002/glia.23448] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 04/09/2018] [Accepted: 04/11/2018] [Indexed: 11/07/2022]
Abstract
Sox2 is a transcription factor active in the nervous system, within different cell types, ranging from radial glia neural stem cells to a few specific types of differentiated glia and neurons. Mutations in the human SOX2 transcription factor gene cause various central nervous system (CNS) abnormalities, involving hippocampus and eye defects, as well as ataxia. Conditional Sox2 mutation in mouse, with different Cre transgenes, previously recapitulated different essential features of the disease, such as hippocampus and eye defects. In the cerebellum, Sox2 is active from early embryogenesis in the neural progenitors of the cerebellar primordium; Sox2 expression is maintained, postnatally, within Bergmann glia (BG), a differentiated cell type essential for Purkinje neurons functionality and correct motor control. By performing Sox2 Cre-mediated ablation in the developing and postnatal mouse cerebellum, we reproduced ataxia features. Embryonic Sox2 deletion (with Wnt1Cre) leads to reduction of the cerebellar vermis, known to be commonly related to ataxia, preceded by deregulation of Otx2 and Gbx2, critical regulators of vermis development. Postnatally, BG is progressively disorganized, mislocalized, and reduced in mutants. Sox2 postnatal deletion, specifically induced in glia (with GLAST-CreERT2), reproduces the BG defect, and causes (milder) ataxic features. Our results define a role for Sox2 in cerebellar function and development, and identify a functional requirement for Sox2 within postnatal BG, of potential relevance for ataxia in mouse mutants, and in human patients.
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Affiliation(s)
- Valentina Cerrato
- Department of Neuroscience Rita Levi-Montalcini, University of Torino, Neuroscience Institute Cavalieri Ottolenghi (NICO), Regione Gonzole, 10, Orbassano, (Torino), 10043, Italy
| | - Sara Mercurio
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, piazza della Scienza 2, Milano, 20126, Italy
| | - Ketty Leto
- Department of Neuroscience Rita Levi-Montalcini, University of Torino, Neuroscience Institute Cavalieri Ottolenghi (NICO), Regione Gonzole, 10, Orbassano, (Torino), 10043, Italy
| | - Elisa Fucà
- Department of Neuroscience Rita Levi-Montalcini, University of Torino, Neuroscience Institute Cavalieri Ottolenghi (NICO), Regione Gonzole, 10, Orbassano, (Torino), 10043, Italy
| | - Eriola Hoxha
- Department of Neuroscience Rita Levi-Montalcini, University of Torino, Neuroscience Institute Cavalieri Ottolenghi (NICO), Regione Gonzole, 10, Orbassano, (Torino), 10043, Italy
| | - Sara Bottes
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, piazza della Scienza 2, Milano, 20126, Italy
| | - Miriam Pagin
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, piazza della Scienza 2, Milano, 20126, Italy
| | - Marco Milanese
- Department of Pharmacy, Pharmacology and Toxicology Unit and Center of Excellence for Biomedical Research, University of Genova, Viale Cembrano 4, Genoa, 16148, Italy
| | - Chew-Yee Ngan
- The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut
| | - Giulia Concina
- Department of Neuroscience Rita Levi-Montalcini, University of Torino, Neuroscience Institute Cavalieri Ottolenghi (NICO), Regione Gonzole, 10, Orbassano, (Torino), 10043, Italy
| | - Sergio Ottolenghi
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, piazza della Scienza 2, Milano, 20126, Italy
| | - Chia-Lin Wei
- The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut
| | - Giambattista Bonanno
- Department of Pharmacy, Pharmacology and Toxicology Unit and Center of Excellence for Biomedical Research, University of Genova, Viale Cembrano 4, Genoa, 16148, Italy
| | - Giulio Pavesi
- Department of Biosciences, University of Milano, 20100, Italy
| | - Filippo Tempia
- Department of Neuroscience Rita Levi-Montalcini, University of Torino, Neuroscience Institute Cavalieri Ottolenghi (NICO), Regione Gonzole, 10, Orbassano, (Torino), 10043, Italy
| | - Annalisa Buffo
- Department of Neuroscience Rita Levi-Montalcini, University of Torino, Neuroscience Institute Cavalieri Ottolenghi (NICO), Regione Gonzole, 10, Orbassano, (Torino), 10043, Italy
| | - Silvia K Nicolis
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, piazza della Scienza 2, Milano, 20126, Italy
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Nedelescu H, Abdelhack M, Pritchard AT. Regional differences in Purkinje cell morphology in the cerebellar vermis of male mice. J Neurosci Res 2018; 96:1476-1489. [PMID: 29319237 DOI: 10.1002/jnr.24206] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 11/18/2017] [Accepted: 11/20/2017] [Indexed: 12/19/2022]
Abstract
Regional differences in dendritic architecture can influence connectivity and dendritic signal integration, with possible consequences for neuronal computation. In the cerebellum, analyses of Purkinje cells (PCs), which are functionally critical as they provide the sole output of the cerebellar cortex, have suggested that the cerebellar cortex is not uniform in structure as traditionally assumed. However, the limitations of traditional staining methods and microscopy capabilities have presented difficulties in investigating possible local variations in PC morphology. To address this question, we used male mice expressing green fluorescent protein selectively in PCs. Using Neurolucida 360 with confocal image stacks, we reconstructed dendritic arbors of PCs residing in lobule V (anterior) and lobule IX (posterior) of the vermis. We then analyzed morphologies of individual arbors and the structure of the assembled "jungle," comparing these features across anatomical locations and age groups. Strikingly, we found that in lobule IX, half of the reconstructed PCs had two primary dendrites emanating from their soma, whereas fewer than a quarter showed this characteristic in lobule V. Furthermore, PCs in lobule V showed more efficient spatial occupancy compared to lobule IX, as well as greater packing density and increased arbor overlap in the adult. When analyzing complete ensembles of PC arbors, we also observed "hot spots" of increased dendritic density in lobule V, whereas lobule IX showed a more homogeneous spread of dendrites. These differences suggest that input patterns and/or physiology of PCs could likewise differ along the vermis, with possible implications for cerebellar function.
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Affiliation(s)
- Hermina Nedelescu
- Department of Systems Neurophysiology, Tokyo Medical and Dental University, Tokyo, Japan
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Rodríguez-Vázquez L, Martí J. Effects of Hydroxyurea Exposure on the Rat Cerebellar Neuroepithelium: an Immunohistochemical and Electron Microscopic Study Along the Anteroposterior and Mediolateral Axes. Neurotox Res 2017; 32:671-682. [PMID: 28744838 DOI: 10.1007/s12640-017-9785-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 07/11/2017] [Accepted: 07/12/2017] [Indexed: 12/31/2022]
Abstract
We present a histological study of the cell death of cerebellar neuroepithelial neuroblasts following treatment with the cytotoxic agent hydroxyurea (HU) during the embryonic life. Pregnant rats were treated with a single dose of HU (300 mg/kg) at embryonic days 13, 14, or 15 of gestation, and their fetuses were studied from 5 to 35 h after treatment to elucidate the mechanisms of HU-induced fetotoxicity. Quantification of several parameters such as the density of pyknotic, mitotic, and PCNA-immunoreactive cells indicated that HU compromises the survival of the cerebellar neuroepithelium neuroblasts. On the other hand, our light and electron microscopic investigations during the course of prenatal development indicated that HU leads to two types of cell death: apoptosis and cells presenting cytoplasmic vacuolization, altered organelles, and a recognizable cell nucleus. Both modalities of cell death resulted in a substantial loss of cerebellar neuroepithelium cells. Current results suggest that HU exposure during gestation is toxic to the cerebellar neuroepithelium. Moreover, they allow to examine the mechanisms of HU-induced toxicity during the early development of the central nervous system. Our data also suggest that it is essential to avoid underestimating the adverse effects of HU when administered during early prenatal life.
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Affiliation(s)
- Lucía Rodríguez-Vázquez
- Unidad de Citología e Histología, Facultad de Biociencias, Universidad Autónoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Joaquín Martí
- Unidad de Citología e Histología, Facultad de Biociencias, Universidad Autónoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
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Molina V, Rodríguez-Vázquez L, Owen D, Valero O, Martí J. Cell cycle analysis in the rat external granular layer evaluated by several bromodeoxyuridine immunoperoxidase staining protocols. Histochem Cell Biol 2017; 148:477-488. [PMID: 28681271 DOI: 10.1007/s00418-017-1593-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/01/2017] [Indexed: 10/19/2022]
Abstract
An important step in bromodeoxyuridine (BrdU) immunohistochemistry is the production of single-stranded DNA to make the incorporated BrdU accessible to the antibodies. This paper examines the effect of distinct DNA denaturation pretreatments (DNase I, sodium citrate buffer, endonuclease Eco RI and exonuclease III, and HCl hydrolysis) on detection of BrdU. We found that all the methods used in the partial denaturation of DNA combined good nuclear immunostaining with acceptable tissue integrity. We also observed that these immunohistochemical protocols revealed a spatial pattern in the distribution of DNA-synthesizing cells within the cerebellar external granular layer (EGL) of 10-day-old rats, allowing us to estimate the fraction of S-phase cells. Our results indicate that detection of BrdU-stained cells is affected by the distinct histological procedures used in such detection. Additionally, as the duration and phases of the cell cycle in EGL neuroblasts are estimated in accordance with BrdU detection, an effect on this detection can render the measurement of cell cycle inaccurate. The present work shows that DNase I and citrate buffer, at appropriate conditions, may be good alternatives for acid denaturation. However, they are less sensitive than autoradiographic techniques that use 3H-thymidine administration. Finally, current data reveal that short survival times after a single BrdU exposure do not seem to affect the cell cycle progression of the EGL neuroblasts.
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Affiliation(s)
- Vanesa Molina
- Unidad de Citología e Histología, Facultad de Biociencias, Universidad Autónoma de Barcelona, Bellaterra, 08193, Barcelona, Spain
| | - Lucía Rodríguez-Vázquez
- Unidad de Citología e Histología, Facultad de Biociencias, Universidad Autónoma de Barcelona, Bellaterra, 08193, Barcelona, Spain
| | - David Owen
- Departament de Filologia Anglesa i de Germanística, Àrea de Filologia Anglesa, Bellaterra, 08193, Barcelona, Spain
| | - Oliver Valero
- Servei d'Estadística Aplicada, Universidad Autónoma de Barcelona, Bellaterra, 08193, Barcelona, Spain
| | - Joaquín Martí
- Unidad de Citología e Histología, Facultad de Biociencias, Universidad Autónoma de Barcelona, Bellaterra, 08193, Barcelona, Spain.
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Morris G, Barichello T, Stubbs B, Köhler CA, Carvalho AF, Maes M. Zika Virus as an Emerging Neuropathogen: Mechanisms of Neurovirulence and Neuro-Immune Interactions. Mol Neurobiol 2017; 55:4160-4184. [PMID: 28601976 DOI: 10.1007/s12035-017-0635-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 05/23/2017] [Indexed: 01/08/2023]
Abstract
Zika virus (ZIKV) is an emerging arbovirus of the genus Flaviviridae, which causes a febrile illness and has spread from across the Pacific to the Americas in a short timeframe. Convincing evidence has implicated the ZIKV to incident cases of neonatal microcephaly and a set of neurodevelopmental abnormalities referred to as the congenital Zika virus syndrome. In addition, emerging data points to an association with the ZIKV and the development of the so-called Guillain-Barre syndrome, an acute autoimmune polyneuropathy. Accumulating knowledge suggests that neurovirulent strains of the ZIKV have evolved from less pathogenic lineages of the virus. Nevertheless, mechanisms of neurovirulence and host-pathogen neuro-immune interactions remain incompletely elucidated. This review provides a critical discussion of genetic and structural alterations in the ZIKV which could have contributed to the emergence of neurovirulent strains. In addition, a mechanistic framework of neuro-immune mechanisms related to the emergence of neuropathology after ZIKV infection is discussed. Recent advances in knowledge point to avenues for the development of a putative vaccine as well as novel therapeutic strategies. Nevertheless, there are unique unmet challenges that need to be addressed in this regard. Finally, a research agenda is proposed.
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Affiliation(s)
- Gerwyn Morris
- Tir Na Nog, Bryn Road seaside 87, Llanelli, Wales, SA15 2LW, UK
| | - Tatiana Barichello
- Laboratory of Experimental Microbiology, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil.,Translational Psychiatry Program, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA.,Neuroscience Graduate Program, The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX, USA
| | - Brendon Stubbs
- Physiotherapy Department, South London and Maudsley NHS Foundation Trust, Denmark Hill, London, SE5 8AZ, UK.,Health Service and Population Research Department, Institute of Psychiatry, Psychology and Neuroscience, King's College London, De Crespigny Park, London, SE5 8AF, UK.,Faculty of Health, Social Care and Education, Anglia Ruskin University, Bishop Hall Lane, Chelmsford, CM1 1SQ, UK
| | - Cristiano A Köhler
- Department of Clinical Medicine and Translational Psychiatry Research Group, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - André F Carvalho
- Department of Clinical Medicine and Translational Psychiatry Research Group, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Michael Maes
- IMPACT Strategic Research Centre, School of Medicine, Barwon Health, Deakin University, P.O. Box 291, Geelong, VIC, 3220, Australia. .,Health Sciences Postgraduate Program, Health Sciences Center, State University of Londrina, Londrina, Parana, Brazil. .,Department of Psychiatry, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand. .,Revitalis, Waalre, The Netherlands. .,Department of Psychiatry, Medical University of Plovdiv, Plovdiv, Bulgaria.
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Watson C, Shimogori T, Puelles L. Mouse Fgf8-Cre-LacZ lineage analysis defines the territory of the postnatal mammalian isthmus. J Comp Neurol 2017; 525:2782-2799. [PMID: 28510270 DOI: 10.1002/cne.24242] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 04/19/2017] [Accepted: 05/05/2017] [Indexed: 12/17/2022]
Abstract
The isthmus is recognized as the most rostral segment of the hindbrain in non-mammalian vertebrates. In mammalian embryos, transient Fgf8 expression defines the developing isthmic region, lying between the midbrain and the first rhombomere, but there has been uncertainty about the existence of a distinct isthmic segment in postnatal mammals. We attempted to find if the region of early embryonic Fgf8 expression (which is considered to involve the entire extent of the prospective isthmus initially) might help to identify the boundaries of the isthmus in postnatal animals. By creating an Fgf8-Cre-LacZ lineage in mice, we were able to show that Fgf8-Cre reporter expression in postnatal mice is present in the same nuclei that characterize the isthmic region in birds. The 'signature' isthmic structures in birds include the trochlear nucleus, the dorsal raphe nucleus, the microcellular tegmental nuclei, the pedunculotegmental nucleus, the vermis of the cerebellum, rostral parts of the parabrachial complex and locus coeruleus, and the caudal parts of the substantia nigra and VTA. We found that all of these structures were labeled with the Fgf8-Cre reporter in the mouse brain, and we conclude that the isthmus is a distinct segment of the mammalian brain lying caudal to the midbrain and rostral to rhombomere 1 of the hindbrain.
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Affiliation(s)
| | | | - Luis Puelles
- Faculty of Medicine and IMIB-Arrixaca, University of Murcia, Murcia, Spain
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Lobular homology in cerebellar hemispheres of humans, non-human primates and rodents: a structural, axonal tracing and molecular expression analysis. Brain Struct Funct 2017; 222:2449-2472. [PMID: 28508291 DOI: 10.1007/s00429-017-1436-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Accepted: 04/28/2017] [Indexed: 02/07/2023]
Abstract
Comparative neuroanatomy provides insights into the evolutionary functional adaptation of specific mammalian cerebellar lobules, in which the lobulation pattern and functional localization are conserved. However, accurate identification of homologous lobules among mammalian species is challenging. In this review, we discuss the inter-species homology of crus I and II lobules which occupy a large volume in the posterior cerebellar hemisphere, particularly in humans. Both crus I/II in humans are homologous to crus I/II in non-human primates, according to Paxinos and colleagues; however, this area has been defined as crus I alone in non-human primates, according to Larsell and Brodal. Our neuroanatomical analyses in humans, macaques, marmosets, rats, and mice demonstrate that both crus I/II in humans are homologous to crus I/II or crus I alone in non-human primates, depending on previous definitions, and to crus I alone in rodents. Here, we refer to the region homologous to human crus I/II lobules as "ansiform area (AA)" across animals. Our results show that the AA's olivocerebellar climbing fiber and Purkinje cell projections as well as aldolase C gene expression patterns are both distinct and conserved in marmosets and rodents. The relative size of the AA, as represented by the AA volume fraction in the whole cerebellum was 0.34 in human, 0.19 in macaque, and approximately 0.1 in marmoset and rodents. These results indicate that the AA reflects an evolutionarily conserved structure in the mammalian cerebellum, which is characterized by distinct connectivity from neighboring lobules and a massive expansion in skillful primates.
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Hibi M, Matsuda K, Takeuchi M, Shimizu T, Murakami Y. Evolutionary mechanisms that generate morphology and neural-circuit diversity of the cerebellum. Dev Growth Differ 2017; 59:228-243. [DOI: 10.1111/dgd.12349] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 03/10/2017] [Accepted: 03/13/2017] [Indexed: 01/10/2023]
Affiliation(s)
- Masahiko Hibi
- Bioscience and Biotechnology Center; Nagoya University; Nagoya 464-8601 Japan
- Graduate School of Science; Nagoya University; Nagoya Aichi 464-8602 Japan
| | - Koji Matsuda
- Bioscience and Biotechnology Center; Nagoya University; Nagoya 464-8601 Japan
- Graduate School of Science; Nagoya University; Nagoya Aichi 464-8602 Japan
| | - Miki Takeuchi
- Bioscience and Biotechnology Center; Nagoya University; Nagoya 464-8601 Japan
| | - Takashi Shimizu
- Bioscience and Biotechnology Center; Nagoya University; Nagoya 464-8601 Japan
- Graduate School of Science; Nagoya University; Nagoya Aichi 464-8602 Japan
| | - Yasunori Murakami
- Graduate School of Science and Engineering; Ehime University; Matsuyama 790-8577 Japan
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Leto K, Arancillo M, Becker EBE, Buffo A, Chiang C, Ding B, Dobyns WB, Dusart I, Haldipur P, Hatten ME, Hoshino M, Joyner AL, Kano M, Kilpatrick DL, Koibuchi N, Marino S, Martinez S, Millen KJ, Millner TO, Miyata T, Parmigiani E, Schilling K, Sekerková G, Sillitoe RV, Sotelo C, Uesaka N, Wefers A, Wingate RJT, Hawkes R. Consensus Paper: Cerebellar Development. CEREBELLUM (LONDON, ENGLAND) 2016; 15:789-828. [PMID: 26439486 PMCID: PMC4846577 DOI: 10.1007/s12311-015-0724-2] [Citation(s) in RCA: 250] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The development of the mammalian cerebellum is orchestrated by both cell-autonomous programs and inductive environmental influences. Here, we describe the main processes of cerebellar ontogenesis, highlighting the neurogenic strategies used by developing progenitors, the genetic programs involved in cell fate specification, the progressive changes of structural organization, and some of the better-known abnormalities associated with developmental disorders of the cerebellum.
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Affiliation(s)
- Ketty Leto
- Department of Neuroscience Rita Levi Montalcini, University of Turin, via Cherasco 15, 10026, Turin, Italy.
- Neuroscience Institute Cavalieri-Ottolenghi, University of Turin, Regione Gonzole 10, 10043, Orbassano, Torino, Italy.
| | - Marife Arancillo
- Departments of Pathology & Immunology and Neuroscience, Baylor College of Medicine, Jan and Dan Duncan Neurological Research Institute of Texas Children's Hospital, 1250 Moursund Street, Suite 1325, Houston, TX, 77030, USA
| | - Esther B E Becker
- Medical Research Council Functional Genomics Unit, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3PT, UK
| | - Annalisa Buffo
- Department of Neuroscience Rita Levi Montalcini, University of Turin, via Cherasco 15, 10026, Turin, Italy
- Neuroscience Institute Cavalieri-Ottolenghi, University of Turin, Regione Gonzole 10, 10043, Orbassano, Torino, Italy
| | - Chin Chiang
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, 4114 MRB III, Nashville, TN, 37232, USA
| | - Baojin Ding
- Department of Microbiology and Physiological Systems and Program in Neuroscience, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA, 01605-2324, USA
| | - William B Dobyns
- Seattle Children's Research Institute, Center for Integrative Brain Research, Seattle, WA, USA
- Department of Pediatrics, Genetics Division, University of Washington, Seattle, WA, USA
| | - Isabelle Dusart
- Sorbonne Universités, Université Pierre et Marie Curie Univ Paris 06, Institut de Biologie Paris Seine, France, 75005, Paris, France
- Centre National de la Recherche Scientifique, CNRS, UMR8246, INSERM U1130, Neuroscience Paris Seine, France, 75005, Paris, France
| | - Parthiv Haldipur
- Seattle Children's Research Institute, Center for Integrative Brain Research, Seattle, WA, USA
| | - Mary E Hatten
- Laboratory of Developmental Neurobiology, The Rockefeller University, New York, NY, 10065, USA
| | - Mikio Hoshino
- Department of Biochemistry and Cellular Biology, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo, 187-8502, Japan
| | - Alexandra L Joyner
- Developmental Biology Program, Sloan Kettering Institute, New York, NY, 10065, USA
| | - Masanobu Kano
- Department of Neurophysiology, Graduate School of Medicine, The University of Tokyo, Tokyo, 113-0033, Japan
| | - Daniel L Kilpatrick
- Department of Microbiology and Physiological Systems and Program in Neuroscience, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA, 01605-2324, USA
| | - Noriyuki Koibuchi
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Silvia Marino
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, 4 Newark Street, London, E1 2AT, UK
| | - Salvador Martinez
- Department Human Anatomy, IMIB-Arrixaca, University of Murcia, Murcia, Spain
| | - Kathleen J Millen
- Seattle Children's Research Institute, Center for Integrative Brain Research, Seattle, WA, USA
| | - Thomas O Millner
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, 4 Newark Street, London, E1 2AT, UK
| | - Takaki Miyata
- Department of Anatomy and Cell Biology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Elena Parmigiani
- Department of Neuroscience Rita Levi Montalcini, University of Turin, via Cherasco 15, 10026, Turin, Italy
- Neuroscience Institute Cavalieri-Ottolenghi, University of Turin, Regione Gonzole 10, 10043, Orbassano, Torino, Italy
| | - Karl Schilling
- Anatomie und Zellbiologie, Anatomisches Institut, Rheinische Friedrich-Wilhelms-Universität, Bonn, Germany
| | - Gabriella Sekerková
- Department of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Roy V Sillitoe
- Departments of Pathology & Immunology and Neuroscience, Baylor College of Medicine, Jan and Dan Duncan Neurological Research Institute of Texas Children's Hospital, 1250 Moursund Street, Suite 1325, Houston, TX, 77030, USA
| | - Constantino Sotelo
- Institut de la Vision, UPMC Université de Paris 06, Paris, 75012, France
| | - Naofumi Uesaka
- Department of Neurophysiology, Graduate School of Medicine, The University of Tokyo, Tokyo, 113-0033, Japan
| | - Annika Wefers
- Center for Neuropathology, Ludwig-Maximilians-University, Munich, Germany
| | - Richard J T Wingate
- MRC Centre for Developmental Neurobiology, King's College London, London, UK
| | - Richard Hawkes
- Department of Cell Biology & Anatomy and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, T2N 4NI, AB, Canada
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Differential timing of granule cell production during cerebellum development underlies generation of the foliation pattern. Neural Dev 2016; 11:17. [PMID: 27609139 PMCID: PMC5017010 DOI: 10.1186/s13064-016-0072-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Accepted: 08/27/2016] [Indexed: 12/02/2022] Open
Abstract
Background The mouse cerebellum (Cb) has a remarkably complex foliated three-dimensional (3D) structure, but a stereotypical cytoarchitecture and local circuitry. Little is known of the cellular behaviors and genes that function during development to determine the foliation pattern. In the anteroposterior axis the mammalian cerebellum is divided by lobules with distinct sizes, and the foliation pattern differs along the mediolateral axis defining a medial vermis and two lateral hemispheres. In the vermis, lobules are further grouped into four anteroposterior zones (anterior, central, posterior and nodular zones) based on genetic criteria, and each has distinct lobules. Since each cerebellar afferent group projects to particular lobules and zones, it is critical to understand how the 3D structure of the Cb is acquired. During cerebellar development, the production of granule cells (gcs), the most numerous cell type in the brain, is required for foliation. We hypothesized that the timing of gc accumulation is different in the four vermal zones during development and contributes to the distinct lobule morphologies. Methods and Results In order to test this idea, we used genetic inducible fate mapping to quantify accumulation of gcs in each lobule during the first two postnatal weeks in mice. The timing of gc production was found to be particular to each lobule, and delayed in the central zone lobules relative to the other zones. Quantification of gc proliferation and differentiation at three time-points in lobules representing different zones, revealed the delay involves a later onset of maximum differentiation and prolonged proliferation of gc progenitors in the central zone. Similar experiments in Engrailed mutants (En1−/+;En2−/−), which have a smaller Cb and altered foliation pattern preferentially outside the central zone, showed that gc production, proliferation and differentiation are altered such that the differences between zones are attenuated compared to wild-type mice. Conclusions Our results reveal that gc production is differentially regulated in each zone of the cerebellar vermis, and our mutant analysis indicates that the dynamics of gc production plays a role in determining the 3D structure of the Cb. Electronic supplementary material The online version of this article (doi:10.1186/s13064-016-0072-z) contains supplementary material, which is available to authorized users.
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Martí J, Molina V, Santa-Cruz MC, Hervás JP. Developmental Injury to the Cerebellar Cortex Following Hydroxyurea Treatment in Early Postnatal Life: An Immunohistochemical and Electron Microscopic Study. Neurotox Res 2016; 31:187-203. [PMID: 27601242 DOI: 10.1007/s12640-016-9666-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 08/17/2016] [Accepted: 08/30/2016] [Indexed: 11/30/2022]
Abstract
Postnatal development of the cerebellar cortex was studied in rats administered with a single dose (2 mg/g) of the cytotoxic agent hydroxyurea (HU) on postnatal day (P) 9 and collected at appropriate times ranging from 6 h to 45 days. Quantification of several parameters such as the density of pyknotic, mitotic, BrdU-positive, and vimentin-stained cells revealed that HU compromises the survival of the external granular layer (EGL) cells. Moreover, vimentin immunocytochemistry revealed overexpression and thicker immunoreactive glial processes in HU-treated rats. On the other hand, we also show that HU leads to the activation of apoptotic cellular events, resulting in a substantial number of dying EGL cells, as revealed by TUNEL staining and at the electron microscope level. Additionally, we quantified several features of the cerebellar cortex of rats exposed to HU in early postnatal life and collected in adulthood. Data analysis indicated that the analyzed parameters were less pronounced in rats administered with this agent. Moreover, we observed several alterations in the cerebellar cortex cytoarchitecture of rats injected with HU. Anomalies included ectopic placement of Purkinje cells and abnormities in the dendritic arbor of these macroneurons. Ectopic granule cells were also found in the molecular layer. These findings provide a clue for investigating the mechanisms of HU-induced toxicity during the development of the central nervous system. Our results also suggest that it is essential to avoid underestimating the adverse effects of this hydroxylated analog of urea when administered during early postnatal life.
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Affiliation(s)
- Joaquín Martí
- Unidad de Citología e Histología, Facultad de Biociencias, Universidad Autónoma de Barcelona, Bellaterra, 08193, Barcelona, Spain.
| | - Vanesa Molina
- Unidad de Citología e Histología, Facultad de Biociencias, Universidad Autónoma de Barcelona, Bellaterra, 08193, Barcelona, Spain
| | - M C Santa-Cruz
- Unidad de Citología e Histología, Facultad de Biociencias, Universidad Autónoma de Barcelona, Bellaterra, 08193, Barcelona, Spain
| | - José P Hervás
- Unidad de Citología e Histología, Facultad de Biociencias, Universidad Autónoma de Barcelona, Bellaterra, 08193, Barcelona, Spain
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Ferguson R, Serafeimidou-Pouliou E, Subramanian V. Dynamic expression of the mouse orthologue of the human amyotropic lateral sclerosis associated gene C9orf72 during central nervous system development and neuronal differentiation. J Anat 2016; 229:871-891. [PMID: 27476503 DOI: 10.1111/joa.12526] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/27/2016] [Indexed: 12/12/2022] Open
Abstract
The hexanucleotide repeat in the first intron of the C9orf72 gene is the most significant cause of amyotropic lateral sclerosis as well as some forms of fronto-temporal dementia. The C9orf72 protein has been previously reported to be expressed in post-mortem human brain as well as in late embryonic and some postnatal stages in mice. Herein, we present a detailed study of the distribution of C9orf72 protein in the embryonic, postnatal and adult mouse brain, spinal cord as well as during the differentiation of P19 embryonal carcinoma cells to neurons including motor neurons. We show that the expression levels of the C9orf72 transcripts in the developing and adult mouse brain as well as in differentiating neurons, are dynamic. Besides the strong expression in the cerebellum and motor cortex reported previously, we show for the first time that C9orf72 is expressed strongly in the olfactory bulb and also in the hippocampus. Our immunostaining data also reveal a hitherto unreported switch in the cellular distribution of C9orf72 from a predominantly cytoplasmic to a nucleo-cytoplasmic distribution during corticogenesis. This switch in distribution was also observed during differentiation of the pluripotent embryonal carcinoma P19 cell line to mature neurons. Our findings have implications for interpreting the pathophysiology caused by the repeat expansions in C9orf72 in mouse models.
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Affiliation(s)
- Ross Ferguson
- Department of Biology and Biochemistry, University of Bath, BA2 7AY, Bath, UK
| | | | - Vasanta Subramanian
- Department of Biology and Biochemistry, University of Bath, BA2 7AY, Bath, UK
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Fiorino A, Manenti G, Gamba B, Bucci G, De Cecco L, Sardella M, Buscemi G, Ciceri S, Radice MT, Radice P, Perotti D. Retina-derived POU domain factor 1 coordinates expression of genes relevant to renal and neuronal development. Int J Biochem Cell Biol 2016; 78:162-172. [PMID: 27425396 DOI: 10.1016/j.biocel.2016.07.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 03/18/2016] [Accepted: 07/14/2016] [Indexed: 12/19/2022]
Abstract
Retina-derived POU domain Factor 1 (RPF-1), a member of POU transcription factor family, is encoded by POU6F2 gene, addressed by interstitial deletions at chromosome 7p14 in Wilms tumor (WT). Its expression has been detected in developing kidney and nervous system, suggesting an early role for this gene in regulating development of these organs. To investigate into its functions and determine its role in transcriptional regulation, we generated an inducible stable transfectant from HEK293 cells. RPF-1 showed nuclear localization, elevated stability, and transactivation of promoters featuring POU consensus sites, and led to reduced cell proliferation and in vivo tumor growth. By addressing the whole transcriptome regulated by its induction, we could detect a gross alteration of gene expression that is consistent with promoter occupancy predicted by genome-wide Chip-chip analysis. Comparison of bound regulatory regions with differentially expressed genes allowed identification of 217 candidate targets. Enrichment of divergent octamers in predicted regulatory regions revealed promiscuous binding to bipartite POUS and POUH consensus half-sites with intervening spacers. Gel-shift competition assay confirmed the specificity of RPF-1 binding to consensus motifs, and demonstrated that the Ser-rich region upstream of the POU domain is indispensable to achieve DNA-binding. Promoter-reporter activity addressing a few target genes indicated a dependence by RPF-1 on transcriptional response. In agreement with its expression in developing kidney and nervous system, the induced transcriptome appears to indicate a function for this protein in early renal differentiation and neuronal cell fate, providing a resource for understanding its role in the processes thereby regulated.
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Affiliation(s)
- Antonio Fiorino
- Department of Predictive & Preventive Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Italy.
| | - Giacomo Manenti
- Department of Predictive & Preventive Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Italy
| | - Beatrice Gamba
- Department of Predictive & Preventive Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Italy
| | - Gabriele Bucci
- Cogentech, Consortium for Genomic Technologies, IFOM-IEO Campus, Italy
| | - Loris De Cecco
- Functional Genomic Core Facility, Fondazione IRCCS Istituto Nazionale dei Tumori, Italy
| | - Michele Sardella
- Department of Predictive & Preventive Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Italy
| | | | - Sara Ciceri
- Department of Predictive & Preventive Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Italy
| | - Maria T Radice
- Experimental Oncology & Molecular Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Italy
| | - Paolo Radice
- Department of Predictive & Preventive Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Italy
| | - Daniela Perotti
- Department of Predictive & Preventive Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Italy
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49
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Martí J, Santa-Cruz MC, Serra R, Hervás JP. Hydroxyurea Treatment and Development of the Rat Cerebellum: Effects on the Neurogenetic Profiles and Settled Patterns of Purkinje Cells and Deep Cerebellar Nuclei Neurons. Neurotox Res 2016; 30:563-580. [PMID: 27401826 DOI: 10.1007/s12640-016-9649-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 06/28/2016] [Accepted: 06/29/2016] [Indexed: 12/17/2022]
Abstract
The current paper analyzes the development of the male and female rat cerebellum exposed to hydroxyurea (HU) (300 or 600 mg/kg) as embryo and collected at postnatal day 90. Our study reveals that the administration of this drug compromises neither the cytoarchitecture of the cerebellar cortex nor deep nuclei (DCN). However, in comparison with the saline group, we observed that several cerebellar parameters were lower in the HU injected groups. These parameters included area of the cerebellum, cerebellar cortex length, molecular layer area, Purkinje cell number, granule cell counts, internal granular layer, white matter and cerebellar nuclei areas, and number of deep cerebellar nuclei neurons. These features were larger in the rats injected with saline, smaller in those exposed to 300 mg/kg of HU and smallest in the group receiving 600 mg/kg of this agent. No sex differences in the effect of the HU were observed. In addition, we infer the neurogenetic timetables and the neurogenetic gradients of PCs and DCN neurons in rats exposed to either saline or HU as embryos. For this purpose, 5-bromo-2'-deoxyuridine was injected into pregnant rats previously administered with saline or HU. This thymidine analog was administered following a progressively delayed cumulative labeling method. The data presented here show that systematic differences exist in the pattern of neurogenesis and in the spatial location of cerebellar neurons between rats injected with saline or HU. No sex differences in the effect of the HU were observed. These findings have implications for the administration of this compound to women in gestation as the effects of HU on the development of the cerebellum might persist throughout their offsprings' life.
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Affiliation(s)
- Joaquín Martí
- Unidad de Citología e Histología, Facultad de Biociencias, Universidad Autónoma de Barcelona, 08193, Bellaterra, Barcelona, Spain.
| | - M C Santa-Cruz
- Unidad de Citología e Histología, Facultad de Biociencias, Universidad Autónoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Roger Serra
- Unidad de Citología e Histología, Facultad de Biociencias, Universidad Autónoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - José P Hervás
- Unidad de Citología e Histología, Facultad de Biociencias, Universidad Autónoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
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Lejeune E, Javili A, Weickenmeier J, Kuhl E, Linder C. Tri-layer wrinkling as a mechanism for anchoring center initiation in the developing cerebellum. SOFT MATTER 2016; 12:5613-5620. [PMID: 27252048 DOI: 10.1039/c6sm00526h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
During cerebellar development, anchoring centers form at the base of each fissure and remain fixed in place while the rest of the cerebellum grows outward. Cerebellar foliation has been extensively studied; yet, the mechanisms that control anchoring center initiation and position remain insufficiently understood. Here we show that a tri-layer model can predict surface wrinkling as a potential mechanism to explain anchoring center initiation and position. Motivated by the cerebellar microstructure, we model the developing cerebellum as a tri-layer system with an external molecular layer and an internal granular layer of similar stiffness and a significantly softer intermediate Purkinje cell layer. Including a weak intermediate layer proves key to predicting surface morphogenesis, even at low stiffness contrasts between the top and bottom layers. The proposed tri-layer model provides insight into the hierarchical formation of anchoring centers and establishes an essential missing link between gene expression and evolution of shape.
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Affiliation(s)
- Emma Lejeune
- Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305, USA.
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