1
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de Jaime-Soguero A, Hattemer J, Bufe A, Haas A, van den Berg J, van Batenburg V, Das B, di Marco B, Androulaki S, Böhly N, Landry JJM, Schoell B, Rosa VS, Villacorta L, Baskan Y, Trapp M, Benes V, Chabes A, Shahbazi M, Jauch A, Engel U, Patrizi A, Sotillo R, van Oudenaarden A, Bageritz J, Alfonso J, Bastians H, Acebrón SP. Developmental signals control chromosome segregation fidelity during pluripotency and neurogenesis by modulating replicative stress. Nat Commun 2024; 15:7404. [PMID: 39191776 DOI: 10.1038/s41467-024-51821-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 08/09/2024] [Indexed: 08/29/2024] Open
Abstract
Human development relies on the correct replication, maintenance and segregation of our genetic blueprints. How these processes are monitored across embryonic lineages, and why genomic mosaicism varies during development remain unknown. Using pluripotent stem cells, we identify that several patterning signals-including WNT, BMP, and FGF-converge into the modulation of DNA replication stress and damage during S-phase, which in turn controls chromosome segregation fidelity in mitosis. We show that the WNT and BMP signals protect from excessive origin firing, DNA damage and chromosome missegregation derived from stalled forks in pluripotency. Cell signalling control of chromosome segregation declines during lineage specification into the three germ layers, but re-emerges in neural progenitors. In particular, we find that the neurogenic factor FGF2 induces DNA replication stress-mediated chromosome missegregation during the onset of neurogenesis, which could provide a rationale for the elevated chromosomal mosaicism of the developing brain. Our results highlight roles for morphogens and cellular identity in genome maintenance that contribute to somatic mosaicism during mammalian development.
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Affiliation(s)
| | - Janina Hattemer
- Centre for Organismal Studies (COS), Heidelberg University, Heidelberg, Germany
| | - Anja Bufe
- Centre for Organismal Studies (COS), Heidelberg University, Heidelberg, Germany
| | - Alexander Haas
- Department of Molecular Oncology, Section for Cellular Oncology, University Medical Center Göttingen (UMG), Göttingen, Germany
| | - Jeroen van den Berg
- Oncode Institute, Utrecht, The Netherlands
- Hubrecht Institute, Utrecht, The Netherlands
- KNAW (Royal Netherlands Academy of Arts and Sciences), Utrecht, The Netherlands
- University Medical Center Utrecht, Utrecht, The Netherlands
| | - Vincent van Batenburg
- Oncode Institute, Utrecht, The Netherlands
- Hubrecht Institute, Utrecht, The Netherlands
- KNAW (Royal Netherlands Academy of Arts and Sciences), Utrecht, The Netherlands
- University Medical Center Utrecht, Utrecht, The Netherlands
| | - Biswajit Das
- Department of Medical Biochemistry and Biophysics, Umeå University, Umeå, Sweden
| | - Barbara di Marco
- Department of Clinical Neurobiology, University Hospital Heidelberg and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Stefania Androulaki
- Centre for Organismal Studies (COS), Heidelberg University, Heidelberg, Germany
| | - Nicolas Böhly
- Department of Molecular Oncology, Section for Cellular Oncology, University Medical Center Göttingen (UMG), Göttingen, Germany
| | - Jonathan J M Landry
- Genomics Core Facility, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
| | - Brigitte Schoell
- Institute of Human Genetics, Heidelberg University, Heidelberg, Germany
| | | | - Laura Villacorta
- Genomics Core Facility, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
| | - Yagmur Baskan
- Centre for Organismal Studies (COS), Heidelberg University, Heidelberg, Germany
| | - Marleen Trapp
- Schaller Research Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Vladimir Benes
- Genomics Core Facility, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
| | - Andrei Chabes
- Department of Medical Biochemistry and Biophysics, Umeå University, Umeå, Sweden
| | | | - Anna Jauch
- Institute of Human Genetics, Heidelberg University, Heidelberg, Germany
| | - Ulrike Engel
- Nikon Imaging Center at the University of Heidelberg, Bioquant, Heidelberg, Germany
| | - Annarita Patrizi
- Schaller Research Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Rocio Sotillo
- Division of Molecular Thoracic Oncology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Alexander van Oudenaarden
- Oncode Institute, Utrecht, The Netherlands
- Hubrecht Institute, Utrecht, The Netherlands
- KNAW (Royal Netherlands Academy of Arts and Sciences), Utrecht, The Netherlands
- University Medical Center Utrecht, Utrecht, The Netherlands
| | - Josephine Bageritz
- Centre for Organismal Studies (COS), Heidelberg University, Heidelberg, Germany
| | - Julieta Alfonso
- Department of Clinical Neurobiology, University Hospital Heidelberg and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Holger Bastians
- Department of Molecular Oncology, Section for Cellular Oncology, University Medical Center Göttingen (UMG), Göttingen, Germany
| | - Sergio P Acebrón
- Centre for Organismal Studies (COS), Heidelberg University, Heidelberg, Germany.
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2
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Gupta I, Yeung J, Rahimi-Balaei M, Wu SR, Goldowitz D. Msx genes delineate a novel molecular map of the developing cerebellar neuroepithelium. Front Mol Neurosci 2024; 17:1356544. [PMID: 38742226 PMCID: PMC11089253 DOI: 10.3389/fnmol.2024.1356544] [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: 12/15/2023] [Accepted: 04/12/2024] [Indexed: 05/16/2024] Open
Abstract
In the early cerebellar primordium, there are two progenitor zones, the ventricular zone (VZ) residing atop the IVth ventricle and the rhombic lip (RL) at the lateral edges of the developing cerebellum. These zones give rise to the several cell types that form the GABAergic and glutamatergic populations of the adult cerebellum, respectively. Recently, an understanding of the molecular compartmentation of these zones has emerged. To add to this knowledge base, we report on the Msx genes, a family of three transcription factors, that are expressed downstream of Bone Morphogenetic Protein (BMP) signaling in these zones. Using fluorescent RNA in situ hybridization, we have characterized the Msx (Msh Homeobox) genes and demonstrated that their spatiotemporal pattern segregates specific regions within the progenitor zones. Msx1 and Msx2 are compartmentalized within the rhombic lip (RL), while Msx3 is localized within the ventricular zone (VZ). The relationship of the Msx genes with an early marker of the glutamatergic lineage, Atoh1, was examined in Atoh1-null mice and it was found that the expression of Msx genes persisted. Importantly, the spatial expression of Msx1 and Msx3 altered in response to the elimination of Atoh1. These results point to the Msx genes as novel early markers of cerebellar progenitor zones and more importantly to an updated view of the molecular parcellation of the RL with respect to the canonical marker of the RL, Atoh1.
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Affiliation(s)
- Ishita Gupta
- British Columbia Children’s Hospital, Vancouver, BC, Canada
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Joanna Yeung
- British Columbia Children’s Hospital, Vancouver, BC, Canada
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Maryam Rahimi-Balaei
- British Columbia Children’s Hospital, Vancouver, BC, Canada
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Sih-Rong Wu
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, United States
| | - Dan Goldowitz
- British Columbia Children’s Hospital, Vancouver, BC, Canada
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
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3
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Schilling K. Revisiting the development of cerebellar inhibitory interneurons in the light of single-cell genetic analyses. Histochem Cell Biol 2024; 161:5-27. [PMID: 37940705 PMCID: PMC10794478 DOI: 10.1007/s00418-023-02251-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/12/2023] [Indexed: 11/10/2023]
Abstract
The present review aims to provide a short update of our understanding of the inhibitory interneurons of the cerebellum. While these cells constitute but a minority of all cerebellar neurons, their functional significance is increasingly being recognized. For one, inhibitory interneurons of the cerebellar cortex are now known to constitute a clearly more diverse group than their traditional grouping as stellate, basket, and Golgi cells suggests, and this diversity is now substantiated by single-cell genetic data. The past decade or so has also provided important information about interneurons in cerebellar nuclei. Significantly, developmental studies have revealed that the specification and formation of cerebellar inhibitory interneurons fundamentally differ from, say, the cortical interneurons, and define a mode of diversification critically dependent on spatiotemporally patterned external signals. Last, but not least, in the past years, dysfunction of cerebellar inhibitory interneurons could also be linked with clinically defined deficits. I hope that this review, however fragmentary, may stimulate interest and help focus research towards understanding the cerebellum.
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Affiliation(s)
- Karl Schilling
- Anatomisches Institut - Anatomie und Zellbiologie, Rheinische Friedrich-Wilhelms-Universität Bonn, Nussallee 10, 53115, Bonn, Germany.
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4
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Coltogirone RA, Sherfinski EI, Dobler ZA, Peterson SN, Andlinger AR, Fadel LC, Patrick RL, Bergeron SA. Gsx2, but not Gsx1, is necessary for early forebrain patterning and long-term survival in zebrafish. Dev Dyn 2023; 252:377-399. [PMID: 36184733 PMCID: PMC9992111 DOI: 10.1002/dvdy.542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 07/23/2022] [Accepted: 08/10/2022] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Homeobox transcription factor encoding genes, genomic screen homeobox 1 and 2 (gsx1 and gsx2), are expressed during neurodevelopment in multiple vertebrates. However, we have limited knowledge of the dynamic expression of these genes through developmental time and the gene networks that they regulate in zebrafish. RESULTS We confirmed that gsx1 is expressed initially in the hindbrain and diencephalon and later in the optic tectum, pretectum, and cerebellar plate. gsx2 is expressed in the early telencephalon and later in the pallium and olfactory bulb. gsx1 and gsx2 are co-expressed in the hypothalamus, preoptic area, and hindbrain, however, rarely co-localize in the same cells. gsx1 and gsx2 mutant zebrafish were made with TALENs. gsx1 mutants exhibit stunted growth, however, they survive to adulthood and are fertile. gsx2 mutants experience swim bladder inflation failure that prevents survival. We also observed significantly reduced expression of multiple forebrain patterning distal-less homeobox genes in mutants, and expression of foxp2 was not significantly affected. CONCLUSIONS This work provides novel tools with which other target genes and functions of Gsx1 and Gsx2 can be characterized across the central nervous system to better understand the unique and overlapping roles of these highly conserved transcription factors.
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Affiliation(s)
| | - Emma I. Sherfinski
- Department of Biology, West Virginia University, Morgantown, West, Virginia, USA
| | - Zoë A. Dobler
- Department of Biology, West Virginia University, Morgantown, West, Virginia, USA
| | - Sarah N. Peterson
- Department of Biology, West Virginia University, Morgantown, West, Virginia, USA
| | | | - Lindsay C. Fadel
- Department of Biology, West Virginia University, Morgantown, West, Virginia, USA
| | - Regina L. Patrick
- Department of Biology, West Virginia University, Morgantown, West, Virginia, USA
| | - Sadie A. Bergeron
- Department of Biology, West Virginia University, Morgantown, West, Virginia, USA
- Department of Neuroscience, West Virginia University, Morgantown, West, Virginia, USA
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5
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Jasonowicz AJ, Simeon A, Zahm M, Cabau C, Klopp C, Roques C, Iampietro C, Lluch J, Donnadieu C, Parrinello H, Drinan DP, Hauser L, Guiguen Y, Planas JV. Generation of a chromosome‐level genome assembly for Pacific halibut (
Hippoglossus stenolepis
) and characterization of its sex‐determining genomic region. Mol Ecol Resour 2022; 22:2685-2700. [PMID: 35569134 PMCID: PMC9541706 DOI: 10.1111/1755-0998.13641] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 04/22/2022] [Accepted: 05/11/2022] [Indexed: 12/01/2022]
Abstract
The Pacific halibut (Hippoglossus stenolepis) is a key species in the North Pacific Ocean and Bering Sea ecosystems, where it also supports important fisheries. However, the lack of genomic resources limits our understanding of evolutionary, environmental and anthropogenic forces affecting key life history characteristics of Pacific halibut and prevents the application of genomic tools in fisheries management and conservation efforts. In the present study, we report on the first generation of a high‐quality chromosome‐level assembly of the Pacific halibut genome, with an estimated size of 602 Mb, 24 chromosome‐length scaffolds that contain 99.8% of the assembly and a N50 scaffold length of 27.3 Mb. In the first application of this important resource, we conducted genome‐wide analyses of sex‐specific genetic variation by pool sequencing and characterized a potential sex‐determining region in chromosome 9 with a high density of female‐specific SNPs. Within this region, we identified the bmpr1ba gene as a potential candidate for master sex‐determining (MSD) gene. bmpr1ba is a member of the TGF‐β family that in teleosts has provided the largest number of MSD genes, including a paralogue of this gene in Atlantic herring. The genome assembly constitutes an essential resource for future studies on Pacific halibut population structure and dynamics, evolutionary history and responses to environmental and anthropogenic influences. Furthermore, the genomic location of the sex‐determining region in Pacific halibut has been identified and a putative candidate MSD gene has been proposed, providing further support for the rapid evolution of sex‐determining mechanisms in teleost fish.
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Affiliation(s)
| | - Anna Simeon
- International Pacific Halibut Commission Seattle, WA 98199 USA
- Present address: School of Aquatic and Fishery Science University of Washington Seattle WA
| | - Margot Zahm
- SIGENAE, Bioinfo Genotoul, UMIAT, INRAE Castanet‐Tolosan France
| | - Cédric Cabau
- SIGENAE, GenPhySE Université de Toulouse INRAE, ENVT, 31326 Castanet‐Tolosan France
| | | | - Céline Roques
- INRAE, GeT‐PlaGe, Genotoul, 31326 Castanet‐Tolosan France
| | | | - Jérôme Lluch
- INRAE, GeT‐PlaGe, Genotoul, 31326 Castanet‐Tolosan France
| | | | - Hugues Parrinello
- MGX‐Montpellier GenomiX, Univ. Montpellier, CNRS, INSERM Montpellier France
| | - Daniel P. Drinan
- School of Aquatic and Fishery Science University of Washington Seattle, WA 98105 USA
| | - Lorenz Hauser
- School of Aquatic and Fishery Science University of Washington Seattle, WA 98105 USA
| | | | - Josep V. Planas
- International Pacific Halibut Commission Seattle, WA 98199 USA
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6
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Katada S, Takouda J, Nakagawa T, Honda M, Igarashi K, Imamura T, Ohkawa Y, Sato S, Kurumizaka H, Nakashima K. Neural stem/precursor cells dynamically change their epigenetic landscape to differentially respond to BMP signaling for fate switching during brain development. Genes Dev 2021; 35:1431-1444. [PMID: 34675062 PMCID: PMC8559679 DOI: 10.1101/gad.348797.121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 09/28/2021] [Indexed: 11/24/2022]
Abstract
In this study, Katada et al. investigated NPC fate regulation and, using multiple genome-wide analyses, they demonstrate that Smads, transcription factors that act downstream from BMP signaling, target dramatically different genomic regions in neurogenic and gliogenic NPCs. Their results show the regulation of NPC property change mediated by the interplay between cell-extrinsic cues and -intrinsic epigenetic programs during cortical development. During neocortical development, tight regulation of neurogenesis-to-astrogenesis switching of neural precursor cells (NPCs) is critical to generate a balanced number of each neural cell type for proper brain functions. Accumulating evidence indicates that a complex array of epigenetic modifications and the availability of extracellular factors control the timing of neuronal and astrocytic differentiation. However, our understanding of NPC fate regulation is still far from complete. Bone morphogenetic proteins (BMPs) are renowned as cytokines that induce astrogenesis of gliogenic late-gestational NPCs. They also promote neurogenesis of mid-gestational NPCs, although the underlying mechanisms remain elusive. By performing multiple genome-wide analyses, we demonstrate that Smads, transcription factors that act downstream from BMP signaling, target dramatically different genomic regions in neurogenic and gliogenic NPCs. We found that histone H3K27 trimethylation and DNA methylation around Smad-binding sites change rapidly as gestation proceeds, strongly associated with the alteration of accessibility of Smads to their target binding sites. Furthermore, we identified two lineage-specific Smad-interacting partners—Sox11 for neurogenic and Sox8 for astrocytic differentiation—that further ensure Smad-regulated fate-specific gene induction. Our findings illuminate an exquisite regulation of NPC property change mediated by the interplay between cell-extrinsic cues and -intrinsic epigenetic programs during cortical development.
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Affiliation(s)
- Sayako Katada
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
| | - Jun Takouda
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
| | - Takumi Nakagawa
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
| | - Mizuki Honda
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
| | - Katsuhide Igarashi
- Institute for Advanced Life Sciences, Hoshi University, Shinagawa-ku, Tokyo 142-8501, Japan
| | - Takuya Imamura
- Program of Biomedical Science, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Yasuyuki Ohkawa
- Division of Transcriptomics, Medical Institute of Bioregulation, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
| | - Shoko Sato
- Laboratory of Chromatin Structure and Function, Institute for Quantitative Biosciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-0032, Japan
| | - Hitoshi Kurumizaka
- Laboratory of Chromatin Structure and Function, Institute for Quantitative Biosciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-0032, Japan
| | - Kinichi Nakashima
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
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7
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Wind M, Gogolou A, Manipur I, Granata I, Butler L, Andrews PW, Barbaric I, Ning K, Guarracino MR, Placzek M, Tsakiridis A. Defining the signalling determinants of a posterior ventral spinal cord identity in human neuromesodermal progenitor derivatives. Development 2021; 148:dev194415. [PMID: 33658223 PMCID: PMC8015249 DOI: 10.1242/dev.194415] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 02/23/2021] [Indexed: 12/14/2022]
Abstract
The anteroposterior axial identity of motor neurons (MNs) determines their functionality and vulnerability to neurodegeneration. Thus, it is a crucial parameter in the design of strategies aiming to produce MNs from human pluripotent stem cells (hPSCs) for regenerative medicine/disease modelling applications. However, the in vitro generation of posterior MNs corresponding to the thoracic/lumbosacral spinal cord has been challenging. Although the induction of cells resembling neuromesodermal progenitors (NMPs), the bona fide precursors of the spinal cord, offers a promising solution, the progressive specification of posterior MNs from these cells is not well defined. Here, we determine the signals guiding the transition of human NMP-like cells toward thoracic ventral spinal cord neurectoderm. We show that combined WNT-FGF activities drive a posterior dorsal pre-/early neural state, whereas suppression of TGFβ-BMP signalling pathways promotes a ventral identity and neural commitment. Based on these results, we define an optimised protocol for the generation of thoracic MNs that can efficiently integrate within the neural tube of chick embryos. We expect that our findings will facilitate the comparison of hPSC-derived spinal cord cells of distinct axial identities.
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Affiliation(s)
- Matthew Wind
- Centre for Stem Cell Biology, Department of Biomedical Science, The University of Sheffield, Sheffield S10 2TN, UK
- Department of Biomedical Science and Bateson Centre, University of Sheffield, Sheffield S10 2TN, UK
- Department of Neuroscience, Neuroscience Institute, University of Sheffield, Western Bank, Sheffield S10 2TN, UK
| | - Antigoni Gogolou
- Centre for Stem Cell Biology, Department of Biomedical Science, The University of Sheffield, Sheffield S10 2TN, UK
- Department of Biomedical Science and Bateson Centre, University of Sheffield, Sheffield S10 2TN, UK
- Department of Neuroscience, Neuroscience Institute, University of Sheffield, Western Bank, Sheffield S10 2TN, UK
| | - Ichcha Manipur
- Computational and Data Science Laboratory, High Performance Computing and Networking Institute, National Research Council of Italy, Napoli 80131, Italy
| | - Ilaria Granata
- Computational and Data Science Laboratory, High Performance Computing and Networking Institute, National Research Council of Italy, Napoli 80131, Italy
| | - Larissa Butler
- Centre for Stem Cell Biology, Department of Biomedical Science, The University of Sheffield, Sheffield S10 2TN, UK
| | - Peter W Andrews
- Centre for Stem Cell Biology, Department of Biomedical Science, The University of Sheffield, Sheffield S10 2TN, UK
| | - Ivana Barbaric
- Centre for Stem Cell Biology, Department of Biomedical Science, The University of Sheffield, Sheffield S10 2TN, UK
| | - Ke Ning
- Department of Neuroscience, Neuroscience Institute, University of Sheffield, Western Bank, Sheffield S10 2TN, UK
- Sheffield Institute for Translational Neuroscience, Department of Neuroscience, University of Sheffield, Sheffield S10 2HQ, UK
| | | | - Marysia Placzek
- Department of Biomedical Science and Bateson Centre, University of Sheffield, Sheffield S10 2TN, UK
| | - Anestis Tsakiridis
- Centre for Stem Cell Biology, Department of Biomedical Science, The University of Sheffield, Sheffield S10 2TN, UK
- Department of Biomedical Science and Bateson Centre, University of Sheffield, Sheffield S10 2TN, UK
- Department of Neuroscience, Neuroscience Institute, University of Sheffield, Western Bank, Sheffield S10 2TN, UK
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8
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Vong KI, Ma TC, Li B, Leung TCN, Nong W, Ngai SM, Hui JHL, Jiang L, Kwan KM. SOX9-COL9A3-dependent regulation of choroid plexus epithelial polarity governs blood-cerebrospinal fluid barrier integrity. Proc Natl Acad Sci U S A 2021; 118:e2009568118. [PMID: 33526661 PMCID: PMC8017668 DOI: 10.1073/pnas.2009568118] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
The choroid plexus (CP) is an extensively vascularized neuroepithelial tissue that projects into the brain ventricles. The restriction of transepithelial transport across the CP establishes the blood-cerebrospinal fluid (CSF) barrier that is fundamental to the homeostatic regulation of the central nervous system microenvironment. However, the molecular mechanisms that control this process remain elusive. Here we show that the genetic ablation of Sox9 in the hindbrain CP results in a hyperpermeable blood-CSF barrier that ultimately upsets the CSF electrolyte balance and alters CSF protein composition. Mechanistically, SOX9 is required for the transcriptional up-regulation of Col9a3 in the CP epithelium. The reduction of Col9a3 expression dramatically recapitulates the blood-CSF barrier defects of Sox9 mutants. Loss of collagen IX severely disrupts the structural integrity of the epithelial basement membrane in the CP, leading to progressive loss of extracellular matrix components. Consequently, this perturbs the polarized microtubule dynamics required for correct orientation of apicobasal polarity and thereby impedes tight junction assembly in the CP epithelium. Our findings reveal a pivotal cascade of SOX9-dependent molecular events that is critical for construction of the blood-CSF barrier.
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Affiliation(s)
- Keng Ioi Vong
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
| | - Tsz Ching Ma
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
| | - Baiying Li
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
| | - Thomas Chun Ning Leung
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
- State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
| | - Wenyan Nong
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
| | - Sai Ming Ngai
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
- State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
- AoE Centre for Genomic Studies on Plant-Environment Interaction for Sustainable Agriculture and Food Security, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
| | - Jerome Ho Lam Hui
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
- State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
| | - Liwen Jiang
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
- State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
- Centre for Cell and Developmental Biology, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
| | - Kin Ming Kwan
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, People's Republic of China;
- State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
- Centre for Cell and Developmental Biology, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
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9
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Najas S, Pijuan I, Esteve-Codina A, Usieto S, Martinez JD, Zwijsen A, Arbonés ML, Martí E, Le Dréau G. A SMAD1/5-YAP signalling module drives radial glia self-amplification and growth of the developing cerebral cortex. Development 2020; 147:dev.187005. [PMID: 32541003 DOI: 10.1242/dev.187005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 06/02/2020] [Indexed: 12/19/2022]
Abstract
The growth and evolutionary expansion of the cerebral cortex are defined by the spatial-temporal production of neurons, which itself depends on the decision of radial glial cells (RGCs) to self-amplify or to switch to neurogenic divisions. The mechanisms regulating these RGC fate decisions are still incompletely understood. Here, we describe a novel and evolutionarily conserved role of the canonical BMP transcription factors SMAD1/5 in controlling neurogenesis and growth during corticogenesis. Reducing the expression of both SMAD1 and SMAD5 in neural progenitors at early mouse cortical development caused microcephaly and an increased production of early-born cortical neurons at the expense of late-born ones, which correlated with the premature differentiation and depletion of the pool of cortical progenitors. Gain- and loss-of-function experiments performed during early cortical neurogenesis in the chick revealed that SMAD1/5 activity supports self-amplifying RGC divisions and restrains the neurogenic ones. Furthermore, we demonstrate that SMAD1/5 stimulate RGC self-amplification through the positive post-transcriptional regulation of the Hippo signalling effector YAP. We anticipate this SMAD1/5-YAP signalling module to be fundamental in controlling growth and evolution of the amniote cerebral cortex.
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Affiliation(s)
- Sonia Najas
- Department of Developmental Biology, Instituto de Biología Molecular de Barcelona, CSIC, Parc Científic de Barcelona, C/ Baldiri Reixac 10-15, 08028 Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Barcelona, Spain
| | - Isabel Pijuan
- Department of Developmental Biology, Instituto de Biología Molecular de Barcelona, CSIC, Parc Científic de Barcelona, C/ Baldiri Reixac 10-15, 08028 Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Barcelona, Spain
| | - Anna Esteve-Codina
- CNAG-CRG, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology (BIST), Baldiri i Reixac 4, 08028 Barcelona, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Susana Usieto
- Department of Developmental Biology, Instituto de Biología Molecular de Barcelona, CSIC, Parc Científic de Barcelona, C/ Baldiri Reixac 10-15, 08028 Barcelona, Spain
| | - Juan D Martinez
- Department of Developmental Biology, Instituto de Biología Molecular de Barcelona, CSIC, Parc Científic de Barcelona, C/ Baldiri Reixac 10-15, 08028 Barcelona, Spain
| | - An Zwijsen
- Department of Cardiovascular Sciences, KU Leuven, Leuven 3000, Belgium
| | - Maria L Arbonés
- Department of Developmental Biology, Instituto de Biología Molecular de Barcelona, CSIC, Parc Científic de Barcelona, C/ Baldiri Reixac 10-15, 08028 Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Barcelona, Spain
| | - Elisa Martí
- Department of Developmental Biology, Instituto de Biología Molecular de Barcelona, CSIC, Parc Científic de Barcelona, C/ Baldiri Reixac 10-15, 08028 Barcelona, Spain
| | - Gwenvael Le Dréau
- Department of Developmental Biology, Instituto de Biología Molecular de Barcelona, CSIC, Parc Científic de Barcelona, C/ Baldiri Reixac 10-15, 08028 Barcelona, Spain
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