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Stepwise fate conversion of supporting cells to sensory hair cells in the chick auditory epithelium. iScience 2023; 26:106046. [PMID: 36818302 PMCID: PMC9932131 DOI: 10.1016/j.isci.2023.106046] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 12/17/2022] [Accepted: 01/20/2023] [Indexed: 01/26/2023] Open
Abstract
In contrast to mammals, the avian cochlea, specifically the basilar papilla, can regenerate sensory hair cells, which involves fate conversion of supporting cells to hair cells. To determine the mechanisms for converting supporting cells to hair cells, we used single-cell RNA sequencing during hair cell regeneration in explant cultures of chick basilar papillae. We identified dynamic changes in the gene expression of supporting cells, and the pseudotime trajectory analysis demonstrated the stepwise fate conversion from supporting cells to hair cells. Initially, supporting cell identity was erased and transition to the precursor state occurred. A subsequent gain in hair cell identity progressed together with downregulation of precursor-state genes. Transforming growth factor β receptor 1-mediated signaling was involved in induction of the initial step, and its inhibition resulted in suppression of hair cell regeneration. Our data provide new insights for understanding fate conversion from supporting cells to hair cells in avian basilar papillae.
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2
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Cristobal CD, Lee HK. Development of myelinating glia: An overview. Glia 2022; 70:2237-2259. [PMID: 35785432 PMCID: PMC9561084 DOI: 10.1002/glia.24238] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 06/24/2022] [Accepted: 06/24/2022] [Indexed: 01/07/2023]
Abstract
Myelin is essential to nervous system function, playing roles in saltatory conduction and trophic support. Oligodendrocytes (OLs) and Schwann cells (SCs) form myelin in the central and peripheral nervous systems respectively and follow different developmental paths. OLs are neural stem-cell derived and follow an intrinsic developmental program resulting in a largely irreversible differentiation state. During embryonic development, OL precursor cells (OPCs) are produced in distinct waves originating from different locations in the central nervous system, with a subset developing into myelinating OLs. OPCs remain evenly distributed throughout life, providing a population of responsive, multifunctional cells with the capacity to remyelinate after injury. SCs derive from the neural crest, are highly dependent on extrinsic signals, and have plastic differentiation states. SC precursors (SCPs) are produced in early embryonic nerve structures and differentiate into multipotent immature SCs (iSCs), which initiate radial sorting and differentiate into myelinating and non-myelinating SCs. Differentiated SCs retain the capacity to radically change phenotypes in response to external signals, including becoming repair SCs, which drive peripheral regeneration. While several transcription factors and myelin components are common between OLs and SCs, their differentiation mechanisms are highly distinct, owing to their unique lineages and their respective environments. In addition, both OLs and SCs respond to neuronal activity and regulate nervous system output in reciprocal manners, possibly through different pathways. Here, we outline their basic developmental programs, mechanisms regulating their differentiation, and recent advances in the field.
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Affiliation(s)
- Carlo D. Cristobal
- Integrative Program in Molecular and Biomedical SciencesBaylor College of MedicineHoustonTexasUSA,Jan and Dan Duncan Neurological Research InstituteTexas Children's HospitalHoustonTexasUSA
| | - Hyun Kyoung Lee
- Integrative Program in Molecular and Biomedical SciencesBaylor College of MedicineHoustonTexasUSA,Jan and Dan Duncan Neurological Research InstituteTexas Children's HospitalHoustonTexasUSA,Department of PediatricsBaylor College of MedicineHoustonTexasUSA,Department of NeuroscienceBaylor College of MedicineHoustonTexasUSA
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3
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Kastriti ME, Faure L, Von Ahsen D, Bouderlique TG, Boström J, Solovieva T, Jackson C, Bronner M, Meijer D, Hadjab S, Lallemend F, Erickson A, Kaucka M, Dyachuk V, Perlmann T, Lahti L, Krivanek J, Brunet J, Fried K, Adameyko I. Schwann cell precursors represent a neural crest-like state with biased multipotency. EMBO J 2022; 41:e108780. [PMID: 35815410 PMCID: PMC9434083 DOI: 10.15252/embj.2021108780] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/14/2022] [Accepted: 06/15/2022] [Indexed: 12/29/2022] Open
Abstract
Schwann cell precursors (SCPs) are nerve-associated progenitors that can generate myelinating and non-myelinating Schwann cells but also are multipotent like the neural crest cells from which they originate. SCPs are omnipresent along outgrowing peripheral nerves throughout the body of vertebrate embryos. By using single-cell transcriptomics to generate a gene expression atlas of the entire neural crest lineage, we show that early SCPs and late migratory crest cells have similar transcriptional profiles characterised by a multipotent "hub" state containing cells biased towards traditional neural crest fates. SCPs keep diverging from the neural crest after being primed towards terminal Schwann cells and other fates, with different subtypes residing in distinct anatomical locations. Functional experiments using CRISPR-Cas9 loss-of-function further show that knockout of the common "hub" gene Sox8 causes defects in neural crest-derived cells along peripheral nerves by facilitating differentiation of SCPs towards sympathoadrenal fates. Finally, specific tumour populations found in melanoma, neurofibroma and neuroblastoma map to different stages of SCP/Schwann cell development. Overall, SCPs resemble migrating neural crest cells that maintain multipotency and become transcriptionally primed towards distinct lineages.
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Affiliation(s)
- Maria Eleni Kastriti
- Department of Molecular Neuroscience, Center for Brain ResearchMedical University ViennaViennaAustria
- Department of Physiology and PharmacologyKarolinska InstitutetStockholmSweden
- Department of Neuroimmunology, Center for Brain ResearchMedical University ViennaViennaAustria
| | - Louis Faure
- Department of Neuroimmunology, Center for Brain ResearchMedical University ViennaViennaAustria
| | - Dorothea Von Ahsen
- Department of Neuroimmunology, Center for Brain ResearchMedical University ViennaViennaAustria
| | | | - Johan Boström
- Department of Neuroimmunology, Center for Brain ResearchMedical University ViennaViennaAustria
| | - Tatiana Solovieva
- Division of Biology and Biological EngineeringCalifornia Institute of TechnologyPasadenaCAUSA
| | - Cameron Jackson
- Division of Biology and Biological EngineeringCalifornia Institute of TechnologyPasadenaCAUSA
| | - Marianne Bronner
- Division of Biology and Biological EngineeringCalifornia Institute of TechnologyPasadenaCAUSA
| | - Dies Meijer
- Centre for Discovery Brain SciencesUniversity of EdinburghEdinburghUK
| | - Saida Hadjab
- Department of NeuroscienceKarolinska InstitutetStockholmSweden
| | | | - Alek Erickson
- Department of Physiology and PharmacologyKarolinska InstitutetStockholmSweden
| | - Marketa Kaucka
- Max Planck Institute for Evolutionary BiologyPlönGermany
| | | | - Thomas Perlmann
- Department of Cell and Molecular BiologyKarolinska InstitutetStockholmSweden
| | - Laura Lahti
- Department of Cell and Molecular BiologyKarolinska InstitutetStockholmSweden
| | - Jan Krivanek
- Department of Histology and Embryology, Faculty of MedicineMasaryk UniversityBrnoCzech Republic
| | - Jean‐Francois Brunet
- Institut de Biologie de l'ENS (IBENS), INSERM, CNRS, École Normale SupérieurePSL Research UniversityParisFrance
| | - Kaj Fried
- Department of NeuroscienceKarolinska InstitutetStockholmSweden
| | - Igor Adameyko
- Department of Physiology and PharmacologyKarolinska InstitutetStockholmSweden
- Department of Neuroimmunology, Center for Brain ResearchMedical University ViennaViennaAustria
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Bonnamour G, Charrier B, Sallis S, Leduc E, Pilon N. NR2F1 regulates a Schwann cell precursor-vs-melanocyte cell fate switch in a mouse model of Waardenburg syndrome type IV. Pigment Cell Melanoma Res 2022; 35:506-516. [PMID: 35816394 DOI: 10.1111/pcmr.13054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 06/30/2022] [Accepted: 07/08/2022] [Indexed: 11/27/2022]
Abstract
Waardenburg syndrome type 4 (WS4) combines abnormal development of neural crest cell (NCC)-derived melanocytes (causing depigmentation and inner ear dysfunction) and enteric nervous system (causing aganglionic megacolon). The full spectrum of WS4 phenotype is present in Spot mice, in which an insertional mutation close to a silencer element leads to NCC-specific upregulation of the transcription factor-coding gene Nr2f1. These mice were previously found to develop aganglionic megacolon because of NR2F1-induced premature differentiation of enteric neural progenitors into enteric glia. Intriguingly, this prior work also showed that inner ear dysfunction in Spot mutants specifically affects balance but not hearing, consistent with the absence of melanocytes in the vestibule only. Here, we report an analysis of the effect of Nr2f1 upregulation on the development of both inner ear and skin melanocytes, also taking in consideration their origin relative to the dorsolateral and ventral NCC migration pathways. In the trunk, we found that NR2F1 overabundance in Spot NCCs forces dorso-laterally migrating melanoblasts to abnormally adopt a Schwann cell precursor (SCP) fate and conversely prevents ventrally migrating SCPs to normally adopt a melanoblast fate. In the head, Nr2f1 upregulation appears not to be uniform, which might explain why SCP-derived melanocytes do colonize the cochlea while non-SCP-derived melanocytes cannot reach the vestibule. Collectively, these data point to a key role for NR2F1 in the control of SCP-vs-melanocyte fate choice and unveil a new pathogenic mechanism for WS4. Moreover, our data argue against the proposed existence of a transit-amplifying compartment of melanocyte precursors in hair follicles.
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Affiliation(s)
- Grégoire Bonnamour
- Molecular Genetics of Development Laboratory, Département des Sciences Biologiques, Université du Québec à Montréal (UQAM), Montréal, Canada.,Centre d'Excellence en Recherche sur les Maladies Orphelines-Fondation Courtois (CERMO-FC), Université du Québec à Montréal, Montréal, Canada
| | - Baptiste Charrier
- Molecular Genetics of Development Laboratory, Département des Sciences Biologiques, Université du Québec à Montréal (UQAM), Montréal, Canada.,Centre d'Excellence en Recherche sur les Maladies Orphelines-Fondation Courtois (CERMO-FC), Université du Québec à Montréal, Montréal, Canada
| | - Sephora Sallis
- Molecular Genetics of Development Laboratory, Département des Sciences Biologiques, Université du Québec à Montréal (UQAM), Montréal, Canada.,Centre d'Excellence en Recherche sur les Maladies Orphelines-Fondation Courtois (CERMO-FC), Université du Québec à Montréal, Montréal, Canada
| | - Elizabeth Leduc
- Molecular Genetics of Development Laboratory, Département des Sciences Biologiques, Université du Québec à Montréal (UQAM), Montréal, Canada.,Centre d'Excellence en Recherche sur les Maladies Orphelines-Fondation Courtois (CERMO-FC), Université du Québec à Montréal, Montréal, Canada
| | - Nicolas Pilon
- Molecular Genetics of Development Laboratory, Département des Sciences Biologiques, Université du Québec à Montréal (UQAM), Montréal, Canada.,Centre d'Excellence en Recherche sur les Maladies Orphelines-Fondation Courtois (CERMO-FC), Université du Québec à Montréal, Montréal, Canada.,Département de Pédiatrie, Université de Montréal, Montréal, Canada
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Sardella-Silva G, Mietto BS, Ribeiro-Resende VT. Four Seasons for Schwann Cell Biology, Revisiting Key Periods: Development, Homeostasis, Repair, and Aging. Biomolecules 2021; 11:1887. [PMID: 34944531 PMCID: PMC8699407 DOI: 10.3390/biom11121887] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 12/08/2021] [Accepted: 12/10/2021] [Indexed: 01/28/2023] Open
Abstract
Like the seasons of the year, all natural things happen in stages, going through adaptations when challenged, and Schwann cells are a great example of that. During maturation, these cells regulate several steps in peripheral nervous system development. The Spring of the cell means the rise and bloom through organized stages defined by time-dependent regulation of factors and microenvironmental influences. Once matured, the Summer of the cell begins: a high energy stage focused on maintaining adult homeostasis. The Schwann cell provides many neuron-glia communications resulting in the maintenance of synapses. In the peripheral nervous system, Schwann cells are pivotal after injuries, balancing degeneration and regeneration, similarly to when Autumn comes. Their ability to acquire a repair phenotype brings the potential to reconnect axons to targets and regain function. Finally, Schwann cells age, not only by growing old, but also by imposed environmental cues, like loss of function induced by pathologies. The Winter of the cell presents as reduced activity, especially regarding their role in repair; this reflects on the regenerative potential of older/less healthy individuals. This review gathers essential information about Schwann cells in different stages, summarizing important participation of this intriguing cell in many functions throughout its lifetime.
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Affiliation(s)
- Gabriela Sardella-Silva
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil;
- Núcleo Multidisciplinar de Pesquisa em Biologia (Numpex-Bio), Campus de Duque de Caxias Geraldo Guerra Cidade, Universidade Federal do Rio de Janeiro, Duque de Caxias 25255-030, RJ, Brazil
| | - Bruno Siqueira Mietto
- Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Juiz de Fora 36036-900, MG, Brazil;
| | - Victor Túlio Ribeiro-Resende
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil;
- Núcleo Multidisciplinar de Pesquisa em Biologia (Numpex-Bio), Campus de Duque de Caxias Geraldo Guerra Cidade, Universidade Federal do Rio de Janeiro, Duque de Caxias 25255-030, RJ, Brazil
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Chen KC, Chen KC, Song ZM, Croaker GD. Structural heart defects associated with ET B mutation, a cause of Hirschsprung disease. BMC Cardiovasc Disord 2021; 21:475. [PMID: 34600481 PMCID: PMC8487587 DOI: 10.1186/s12872-021-02281-2] [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] [Received: 06/15/2020] [Accepted: 09/23/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND HSCR, a colonic neurocristopathy affecting 1/5000 births, is suggested to associate with cardiac septal defects and conotruncal malformations. However, we question subtle cardiac changes maybe more commonly present due to multi-regulations by HSCR candidate genes, in this instance, ETB. To investigate, we compared the cardiac morphology and quantitative measurements of sl/sl rat to those of the control group. METHODS Eleven neonatal rats were generated from heterozygote (ETB+/-) crossbreeding. Age and bodyweight were recorded at time of sacrifice. Diffusion-staining protocols with 1.5% iodine solution was completed prior to micro-CT scanning. All rats were scanned using an in vivo micro-CT scanner, Caliper Quantum FX, followed by two quality-control scans using a custom-built ex vivo micro-CT system. All scans were reviewed for gross cardiac dysmorphology. Micro-CT data were segmented semi-automatically post-NLM filtering for: whole-heart, LV, RV, LA, RA, and aortic arch. Measurements were taken with Drishti. Following image analysis, PCR genotyping of rats was performed: five sl/sl rats, three wildtype, and three heterozygotes. Statistical comparisons on organ volume, growth rate, and organ volume/bodyweight ratios were made between sl/sl and the control group. RESULTS Cardiac morphology and constituents were preserved. However, significant volumetric reductions were recorded in sl/sl rats with respect to the control: whole heart (38.70%, p value = 0.02); LV (41.22%, p value = 0.01), RV (46.15%, p value = 0.02), LA (44.93%, p value = 0.06), and RA (39.49%, p value = 0.02). Consistent trend was observed in growth rate (~ 20%) and organ-volume/bodyweight ratios (~ 25%). On the contrary, measurements on aortic arch demonstrated no significant difference among the two groups. CONCLUSION Despite the presence of normal morphology, significant cardiac growth retardation was detected in sl/sl rat, supporting the likely association of cardiac anomalies with HSCR, at least in ETB-/- subtype. Structural reduction was likely due to a combination of failure to thrive from enteric dysfunction, alterations to CaNCC colonization, and importantly coronary hypoperfusion from elevated ET-1/ETA-mediated hypervasoconstriction. Little correlation was detected between aortic arch development and sl/sl rat, supporting minor ETB role in large vessels. Although further clinical study is warranted, HSCR patients may likely require cardiac assessment in view of potential congenital cardiac defects.
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Affiliation(s)
- Ko-Chin Chen
- Australian National University Medical School, Florey Building 54 Mills Road, Acton, ACT 2601 Australia
| | - Ko-Chien Chen
- MD Anderson Cancer Centre, University of Texas, Houston, TX 77030 USA
| | - Zan-Min Song
- The John Curtin School of Medical Research, Australian National University Medical School, Acton, ACT 2601 Australia
| | - Geoffrey D. Croaker
- Australian National University Medical School, Florey Building 54 Mills Road, Acton, ACT 2601 Australia
- Paediatric Surgery, The Canberra Hospital, Garran, ACT Australia
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7
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Previtali SC. Peripheral Nerve Development and the Pathogenesis of Peripheral Neuropathy: the Sorting Point. Neurotherapeutics 2021; 18:2156-2168. [PMID: 34244926 PMCID: PMC8804061 DOI: 10.1007/s13311-021-01080-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2021] [Indexed: 12/12/2022] Open
Abstract
Nerve development requires a coordinated sequence of events and steps to be accomplished for the generation of functional peripheral nerves to convey sensory and motor signals. Any abnormality during development may result in pathological structure and function of the nerve, which evolves in peripheral neuropathy. In this review, we will briefly describe different steps of nerve development while we will mostly focus on the molecular mechanisms involved in radial sorting of axons, one of these nerve developmental steps. We will summarize current knowledge of molecular pathways so far reported in radial sorting and their possible interactions. Finally, we will describe how disruption of these pathways may result in human neuropathies.
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Affiliation(s)
- Stefano C Previtali
- Neuromuscular Repair Unit, InSpe (Institute of Experimental Neurology) and Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy.
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8
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Spatial variation in gene expression of Tasmanian devil facial tumors despite minimal host transcriptomic response to infection. BMC Genomics 2021; 22:698. [PMID: 34579650 PMCID: PMC8477496 DOI: 10.1186/s12864-021-07994-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 09/08/2021] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Transmissible cancers lie at the intersection of oncology and infectious disease, two traditionally divergent fields for which gene expression studies are particularly useful for identifying the molecular basis of phenotypic variation. In oncology, transcriptomics studies, which characterize the expression of thousands of genes, have identified processes leading to heterogeneity in cancer phenotypes and individual prognoses. More generally, transcriptomics studies of infectious diseases characterize interactions between host, pathogen, and environment to better predict population-level outcomes. Tasmanian devils have been impacted dramatically by a transmissible cancer (devil facial tumor disease; DFTD) that has led to widespread population declines. Despite initial predictions of extinction, populations have persisted at low levels, due in part to heterogeneity in host responses, particularly between sexes. However, the processes underlying this variation remain unknown. RESULTS We sequenced transcriptomes from healthy and DFTD-infected devils, as well as DFTD tumors, to characterize host responses to DFTD infection, identify differing host-tumor molecular interactions between sexes, and investigate the extent to which tumor gene expression varies among host populations. We found minimal variation in gene expression of devil lip tissues, either with respect to DFTD infection status or sex. However, 4088 genes were differentially expressed in tumors among our sampling localities. Pathways that were up- or downregulated in DFTD tumors relative to normal tissues exhibited the same patterns of expression with greater intensity in tumors from localities that experienced DFTD for longer. No mRNA sequence variants were associated with expression variation. CONCLUSIONS Expression variation among localities may reflect morphological differences in tumors that alter ratios of normal-to-tumor cells within biopsies. Phenotypic variation in tumors may arise from environmental variation or differences in host immune response that were undetectable in lip biopsies, potentially reflecting variation in host-tumor coevolutionary relationships among sites that differ in the time since DFTD arrival.
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9
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Tasdemir-Yilmaz OE, Druckenbrod NR, Olukoya OO, Dong W, Yung AR, Bastille I, Pazyra-Murphy MF, Sitko AA, Hale EB, Vigneau S, Gimelbrant AA, Kharchenko PV, Goodrich LV, Segal RA. Diversity of developing peripheral glia revealed by single-cell RNA sequencing. Dev Cell 2021; 56:2516-2535.e8. [PMID: 34469751 DOI: 10.1016/j.devcel.2021.08.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 05/31/2021] [Accepted: 08/06/2021] [Indexed: 12/22/2022]
Abstract
The peripheral nervous system responds to a wide variety of sensory stimuli, a process that requires great neuronal diversity. These diverse neurons are closely associated with glial cells originating from the neural crest. However, the molecular nature and diversity among peripheral glia are not understood. Here, we used single-cell RNA sequencing to profile developing and mature glia from somatosensory dorsal root ganglia and auditory spiral ganglia. We found that glial precursors (GPs) in these two systems differ in their transcriptional profiles. Despite their unique features, somatosensory and auditory GPs undergo convergent differentiation to generate molecularly uniform myelinating and non-myelinating Schwann cells. By contrast, somatosensory and auditory satellite glial cells retain system-specific features. Lastly, we identified a glial signature gene set, providing new insights into commonalities among glia across the nervous system. This survey of gene expression in peripheral glia constitutes a resource for understanding functions of glia across different sensory modalities.
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Affiliation(s)
- Ozge E Tasdemir-Yilmaz
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA
| | - Noah R Druckenbrod
- Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA
| | | | - Weixiu Dong
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA 02115, USA
| | - Andrea R Yung
- Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA
| | - Isle Bastille
- Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA
| | - Maria F Pazyra-Murphy
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA
| | - Austen A Sitko
- Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA
| | - Evan B Hale
- Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA
| | - Sébastien Vigneau
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | | | - Peter V Kharchenko
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA 02115, USA
| | - Lisa V Goodrich
- Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.
| | - Rosalind A Segal
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.
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10
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Nerve-associated Schwann cell precursors contribute extracutaneous melanocytes to the heart, inner ear, supraorbital locations and brain meninges. Cell Mol Life Sci 2021; 78:6033-6049. [PMID: 34274976 PMCID: PMC8316242 DOI: 10.1007/s00018-021-03885-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/07/2021] [Accepted: 06/18/2021] [Indexed: 02/07/2023]
Abstract
Melanocytes are pigmented cells residing mostly in the skin and hair follicles of vertebrates, where they contribute to colouration and protection against UV-B radiation. However, the spectrum of their functions reaches far beyond that. For instance, these pigment-producing cells are found inside the inner ear, where they contribute to the hearing function, and in the heart, where they are involved in the electrical conductivity and support the stiffness of cardiac valves. The embryonic origin of such extracutaneous melanocytes is not clear. We took advantage of lineage-tracing experiments combined with 3D visualizations and gene knockout strategies to address this long-standing question. We revealed that Schwann cell precursors are recruited from the local innervation during embryonic development and give rise to extracutaneous melanocytes in the heart, brain meninges, inner ear, and other locations. In embryos with a knockout of the EdnrB receptor, a condition imitating Waardenburg syndrome, we observed only nerve-associated melanoblasts, which failed to detach from the nerves and to enter the inner ear. Finally, we looked into the evolutionary aspects of extracutaneous melanocytes and found that pigment cells are associated mainly with nerves and blood vessels in amphibians and fish. This new knowledge of the nerve-dependent origin of extracutaneous pigment cells might be directly relevant to the formation of extracutaneous melanoma in humans.
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11
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Uesaka T, Okamoto M, Nagashimada M, Tsuda Y, Kihara M, Kiyonari H, Enomoto H. Enhanced enteric neurogenesis by Schwann cell precursors in mouse models of Hirschsprung disease. Glia 2021; 69:2575-2590. [PMID: 34272903 DOI: 10.1002/glia.24059] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 04/21/2021] [Accepted: 07/05/2021] [Indexed: 12/31/2022]
Abstract
Hirschsprung disease (HSCR) is characterized by congenital absence of enteric neurons in distal portions of the gut. Although recent studies identified Schwann cell precursors (SCPs) as a novel cellular source of enteric neurons, it is unknown how SCPs contribute to the disease phenotype of HSCR. Using Schwann cell-specific genetic labeling, we investigated SCP-derived neurogenesis in two mouse models of HSCR; Sox10 haploinsufficient mice exhibiting distal colonic aganglionosis and Ednrb knockout mice showing small intestinal aganglionosis. We also examined Ret dependency in SCP-derived neurogenesis using mice displaying intestinal aganglionosis in which Ret expression was conditionally removed in the Schwann cell lineage. SCP-derived neurons were abundant in the transition zone lying between the ganglionated and aganglionic segments, although SCP-derived neurogenesis was scarce in the aganglionic region. In the transition zone, SCPs mainly gave rise to nitrergic neurons that are rarely observed in the SCP-derived neurons under the normal condition. Enhanced SCP-derived neurogenesis was also detected in the transition zone of mice lacking RET expression in the Schwann cell lineage. Increased SCP-derived neurogenesis in the transition zone suggests that reduction in the vagal neural crest-derived enteric neurons promotes SCP-derived neurogenesis. SCPs may adopt a neuronal subtype by responding to changes in the gut environment. Robust SCP-derived neurogenesis can occur in a Ret-independent manner, which suggests that SCPs are a cellular source to compensate for missing enteric neurons in HSCR.
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Affiliation(s)
- Toshihiro Uesaka
- Division for Neural Differentiation and Regeneration, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - Mitsumasa Okamoto
- Division for Neural Differentiation and Regeneration, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.,Department of Pediatric Surgery, Japanese Red Cross Society, Himeji Hospital, Himeji, Hyogo, Japan
| | - Mayumi Nagashimada
- Division for Neural Differentiation and Regeneration, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.,Division of Health Science, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Yoshihiro Tsuda
- Division for Neural Differentiation and Regeneration, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - Miho Kihara
- Laboratory for Animal Resources and Genetic Engineering, RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo, Japan
| | - Hiroshi Kiyonari
- Laboratory for Animal Resources and Genetic Engineering, RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo, Japan
| | - Hideki Enomoto
- Division for Neural Differentiation and Regeneration, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
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Cordelli DM, Di Pisa V, Fetta A, Garavelli L, Maltoni L, Soliani L, Ricci E. Neurological Phenotype of Mowat-Wilson Syndrome. Genes (Basel) 2021; 12:genes12070982. [PMID: 34199024 PMCID: PMC8305916 DOI: 10.3390/genes12070982] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/22/2021] [Accepted: 06/24/2021] [Indexed: 02/01/2023] Open
Abstract
Mowat-Wilson Syndrome (MWS) (OMIM # 235730) is a rare disorder due to ZEB2 gene defects (heterozygous mutation or deletion). The ZEB2 gene is a widely expressed regulatory gene, extremely important for the proper prenatal development. MWS is characterized by a specific facial gestalt and multiple musculoskeletal, cardiac, gastrointestinal, and urogenital anomalies. The nervous system involvement is extensive and constitutes one of the main features in MWS, heavily affecting prognosis and life quality of affected individuals. This review aims to comprehensively organize and discuss the neurological and neurodevelopmental phenotype of MWS. First, we will describe the role of ZEB2 in the formation and development of the nervous system by reviewing the preclinical studies in this regard. ZEB2 regulates the neural crest cell differentiation and migration, as well as in the modulation of GABAergic transmission. This leads to different degrees of structural and functional impairment that have been explored and deepened by various authors over the years. Subsequently, the different neurological aspects of MWS (head and brain malformations, epilepsy, sleep disorders, and enteric and peripheral nervous system involvement, as well as developmental, cognitive, and behavioral features) will be faced one at a time and extensively examined from both a clinical and etiopathogenetic point of view, linking them to the ZEB2 related pathways.
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Affiliation(s)
- Duccio Maria Cordelli
- IRCCS Istituto delle Scienze Neurologiche di Bologna, UOC Neuropsichiatria dell’Età Pediatrica, 40139 Bologna, Italy; (V.D.P.); (A.F.); (L.M.); (L.S.)
- Correspondence:
| | - Veronica Di Pisa
- IRCCS Istituto delle Scienze Neurologiche di Bologna, UOC Neuropsichiatria dell’Età Pediatrica, 40139 Bologna, Italy; (V.D.P.); (A.F.); (L.M.); (L.S.)
| | - Anna Fetta
- IRCCS Istituto delle Scienze Neurologiche di Bologna, UOC Neuropsichiatria dell’Età Pediatrica, 40139 Bologna, Italy; (V.D.P.); (A.F.); (L.M.); (L.S.)
| | - Livia Garavelli
- Medical Genetics Unit, Department of Mother and Child, Azienda USL-IRCCS di Reggio Emilia, 42123 Reggio Emilia, Italy;
| | - Lucia Maltoni
- IRCCS Istituto delle Scienze Neurologiche di Bologna, UOC Neuropsichiatria dell’Età Pediatrica, 40139 Bologna, Italy; (V.D.P.); (A.F.); (L.M.); (L.S.)
| | - Luca Soliani
- IRCCS Istituto delle Scienze Neurologiche di Bologna, UOC Neuropsichiatria dell’Età Pediatrica, 40139 Bologna, Italy; (V.D.P.); (A.F.); (L.M.); (L.S.)
| | - Emilia Ricci
- Child Neuropsychiatry Unit, Epilepsy Center, San Paolo Hospital, Department of Health Sciences, University of Milan, 20142 Milan, Italy;
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13
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Chen KC, Song ZM, Croaker GD. Brain size reductions associated with endothelin B receptor mutation, a cause of Hirschsprung's disease. BMC Neurosci 2021; 22:42. [PMID: 34147087 PMCID: PMC8214790 DOI: 10.1186/s12868-021-00646-z] [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] [Received: 06/20/2020] [Accepted: 06/08/2021] [Indexed: 01/03/2023] Open
Abstract
Background ETB has been reported to regulate neurogenesis and vasoregulation in foetal development. Its dysfunction was known to cause HSCR, an aganglionic colonic disorder with syndromic forms reported to associate with both small heads and developmental delay. We therefore asked, "is CNS maldevelopment a more general feature of ETB mutation?" To investigate, we reviewed the micro-CT scans of an ETB−/− model animal, sl/sl rat, and quantitatively evaluated the structural changes of its brain constituents. Methods Eleven neonatal rats generated from ETB+/− cross breeding were sacrificed. Micro-CT scans were completed following 1.5% iodine-staining protocols. All scans were reviewed for morphological changes. Selected organs were segmented semi-automatically post-NLM filtering: TBr, T-CC, T-CP, OB, Med, Cer, Pit, and S&I Col. Volumetric measurements were made using Drishti rendering software. Rat genotyping was completed following analysis. Statistical comparisons on organ volume, organ growth rate, and organ volume/bodyweight ratios were made between sl/sl and the control groups based on autosomal recessive inheritance. One-way ANOVA was also performed to evaluate potential dose-dependent effect. Results sl/sl rat has 16.32% lower body weight with 3.53% lower growth rate than the control group. Gross intracranial morphology was preserved in sl/sl rats. However, significant volumetric reduction of 20.33% was detected in TBr; similar reductions were extended to the measurements of T-CC, T-CP, OB, Med, and Pit. Consistently, lower brain and selected constituent growth rates were detected in sl/sl rat, ranging from 6.21% to 11.51% reduction. Lower organ volume/bodyweight ratio was detected in sl/sl rats, reflecting disproportional neural changes with respect to body size. No consistent linear relationships exist between ETB copies and intracranial organ size or growth rates. Conclusion Although ETB−/− mutant has a normal CNS morphology, significant size reductions in brain and constituents were detected. These structural changes likely arise from a combination of factors secondary to dysfunctional ET-1/ET-3/ETB signalling, including global growth impairment from HSCR-induced malnutrition and dysregulations in the neurogenesis, angiogenesis, and cerebral vascular control. These changes have important clinical implications, such as autonomic dysfunction or intellectual delay. Although further human study is warranted, our study suggested comprehensive managements are required for HSCR patients, at least in ETB−/− subtype. Supplementary Information The online version contains supplementary material available at 10.1186/s12868-021-00646-z.
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Affiliation(s)
- Ko-Chin Chen
- Medical School, Australian National University, Canberra, ACT, 2601, Australia.
| | - Zan-Min Song
- Medical School, Australian National University, Canberra, ACT, 2601, Australia
| | - Geoffrey D Croaker
- Medical School, Australian National University, Canberra, ACT, 2601, Australia.,The Canberra Hospital, Yamba Drive, Garran, ACT, 2605, Australia
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14
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Vasudevan HN, Lucas CHG, Villanueva-Meyer JE, Theodosopoulos PV, Raleigh DR. Genetic Events and Signaling Mechanisms Underlying Schwann Cell Fate in Development and Cancer. Neurosurgery 2021; 88:234-245. [PMID: 33094349 DOI: 10.1093/neuros/nyaa455] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 08/08/2020] [Indexed: 01/08/2023] Open
Abstract
In this review, we describe Schwann cell development from embryonic neural crest cells to terminally differentiated myelinated and nonmyelinated mature Schwann cells. We focus on the genetic drivers and signaling mechanisms mediating decisions to proliferate versus differentiate during Schwann cell development, highlighting pathways that overlap with Schwann cell development and are dysregulated in tumorigenesis. We conclude by considering how our knowledge of the events underlying Schwann cell development and mouse models of schwannoma, neurofibroma, and malignant peripheral nerve sheath tumor can inform novel therapeutic strategies for patients with cancers derived from Schwann cell lineages.
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Affiliation(s)
- Harish N Vasudevan
- Department of Radiation Oncology, University of California, San Francisco, San Francisco, California.,Department of Neurological Surgery, University of California, San Francisco, San Francisco, California
| | - Calixto-Hope G Lucas
- Department of Anatomic Pathology, University of California, San Francisco, San Francisco, California
| | - Javier E Villanueva-Meyer
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California
| | - Philip V Theodosopoulos
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, California
| | - David R Raleigh
- Department of Radiation Oncology, University of California, San Francisco, San Francisco, California.,Department of Neurological Surgery, University of California, San Francisco, San Francisco, California
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15
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Muppirala AN, Limbach LE, Bradford EF, Petersen SC. Schwann cell development: From neural crest to myelin sheath. WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY 2020; 10:e398. [PMID: 33145925 DOI: 10.1002/wdev.398] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 10/06/2020] [Accepted: 10/07/2020] [Indexed: 12/16/2022]
Abstract
Vertebrate nervous system function requires glial cells, including myelinating glia that insulate axons and provide trophic support that allows for efficient signal propagation by neurons. In vertebrate peripheral nervous systems, neural crest-derived glial cells known as Schwann cells (SCs) generate myelin by encompassing and iteratively wrapping membrane around single axon segments. SC gliogenesis and neurogenesis are intimately linked and governed by a complex molecular environment that shapes their developmental trajectory. Changes in this external milieu drive developing SCs through a series of distinct morphological and transcriptional stages from the neural crest to a variety of glial derivatives, including the myelinating sublineage. Cues originate from the extracellular matrix, adjacent axons, and the developing SC basal lamina to trigger intracellular signaling cascades and gene expression changes that specify stages and transitions in SC development. Here, we integrate the findings from in vitro neuron-glia co-culture experiments with in vivo studies investigating SC development, particularly in zebrafish and mouse, to highlight critical factors that specify SC fate. Ultimately, we connect classic biochemical and mutant studies with modern genetic and visualization tools that have elucidated the dynamics of SC development. This article is categorized under: Signaling Pathways > Cell Fate Signaling Nervous System Development > Vertebrates: Regional Development.
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Affiliation(s)
- Anoohya N Muppirala
- Program in Neuroscience, Harvard Medical School, Boston, Massachusetts, USA.,Department of Neuroscience, Kenyon College, Gambier, Ohio, USA
| | | | | | - Sarah C Petersen
- Department of Neuroscience, Kenyon College, Gambier, Ohio, USA.,Department of Biology, Kenyon College, Gambier, Ohio, USA
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16
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Adams KL, Riparini G, Banerjee P, Breur M, Bugiani M, Gallo V. Endothelin-1 signaling maintains glial progenitor proliferation in the postnatal subventricular zone. Nat Commun 2020; 11:2138. [PMID: 32358570 PMCID: PMC7195367 DOI: 10.1038/s41467-020-16028-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 04/06/2020] [Indexed: 12/18/2022] Open
Abstract
Signaling molecules that regulate neurodevelopmental processes in the early postnatal subventricular zone (SVZ) are critical for proper brain development yet remain poorly characterized. Here, we report that Endothelin-1 (ET-1), a molecular component of the postnatal SVZ, promotes radial glial cell maintenance and proliferation in an autocrine manner via Notch signaling. Loss of ET-1 signaling increases neurogenesis and reduces oligodendrocyte progenitor cell proliferation (OPC) in the developing SVZ, thereby altering cellular output of the stem cell niche. We also show that ET-1 is required for increased neural stem cell and OPC proliferation in the adult mouse SVZ following demyelination. Lastly, high levels of ET-1 in the SVZ of patients with Cathepsin A-related arteriopathy with strokes and leukoencephalopathy correlate with an increased number of SVZ OPCs, suggesting ET-1's role as a regulator of glial progenitor proliferation may be conserved in humans. ET-1 signaling therefore presents a potential new therapeutic target for promoting SVZ-mediated cellular repair.
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Affiliation(s)
- Katrina L Adams
- Center for Neuroscience Research, Children's National Research Institute, Children's National Hospital, Washington, DC, 20010, USA
| | - Giulia Riparini
- Center for Neuroscience Research, Children's National Research Institute, Children's National Hospital, Washington, DC, 20010, USA
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy
| | - Payal Banerjee
- Children's National Research Institute Bioinformatics Unit, Children's National Hospital, Washington, DC, 20010, USA
| | - Marjolein Breur
- Department of Child Neurology, VU University Medical Center, Amsterdam, The Netherlands
| | - Marianna Bugiani
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands
| | - Vittorio Gallo
- Center for Neuroscience Research, Children's National Research Institute, Children's National Hospital, Washington, DC, 20010, USA.
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17
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Fledrich R, Kungl T, Nave KA, Stassart RM. Axo-glial interdependence in peripheral nerve development. Development 2019; 146:146/21/dev151704. [PMID: 31719044 DOI: 10.1242/dev.151704] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
During the development of the peripheral nervous system, axons and myelinating Schwann cells form a unique symbiotic unit, which is realized by a finely tuned network of molecular signals and reciprocal interactions. The importance of this complex interplay becomes evident after injury or in diseases in which aspects of axo-glial interaction are perturbed. This Review focuses on the specific interdependence of axons and Schwann cells in peripheral nerve development that enables axonal outgrowth, Schwann cell lineage progression, radial sorting and, finally, formation and maintenance of the myelin sheath.
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Affiliation(s)
- Robert Fledrich
- Institute of Anatomy, Leipzig University, 04103 Leipzig, Germany .,Department of Neurogenetics, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany
| | - Theresa Kungl
- Institute of Anatomy, Leipzig University, 04103 Leipzig, Germany.,Department of Neurogenetics, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany
| | - Klaus-Armin Nave
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany
| | - Ruth M Stassart
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany .,Department of Neuropathology, University Clinic Leipzig, 04103 Leipzig, Germany
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18
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Jessen KR, Mirsky R. Schwann Cell Precursors; Multipotent Glial Cells in Embryonic Nerves. Front Mol Neurosci 2019; 12:69. [PMID: 30971890 PMCID: PMC6443887 DOI: 10.3389/fnmol.2019.00069] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 03/04/2019] [Indexed: 12/20/2022] Open
Abstract
The cells of the neural crest, often referred to as neural crest stem cells, give rise to a number of sub-lineages, one of which is Schwann cells, the glial cells of peripheral nerves. Crest cells transform to adult Schwann cells through the generation of two well defined intermediate stages, the Schwann cell precursors (SCP) in early embryonic nerves, and immature Schwann cells (iSch) in late embryonic and perinatal nerves. SCP are formed when neural crest cells enter nascent nerves and form intimate relationships with axons, a diagnostic feature of glial cells. This involves large-scale changes in gene expression, including the activation of established glial cell markers. Like early glia in the CNS, radial glia, SCP retain developmental multipotency and contribute to other crest-derived lineages during embryonic development. SCP, as well as closely related cells termed boundary cap cells, and later stages of the Schwann cell lineage have all been implicated as the tumor initiating cell in NF1 associated neurofibromas. iSch are formed from SCP in a process that involves the appearance of additional differentiation markers, autocrine survival circuits, cellular elongation, a formation of endoneurial connective tissue and basal lamina. Finally, in peri- and post-natal nerves, iSch are reversibly induced by axon-associated signals to form the myelin and non-myelin Schwann cells of adult nerves. This review article discusses early Schwann cell development in detail and describes a large number of molecular signaling systems that control glial development in embryonic nerves.
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Affiliation(s)
- Kristjan R Jessen
- Department of Cell and Developmental Biology, University College London, London, United Kingdom
| | - Rhona Mirsky
- Department of Cell and Developmental Biology, University College London, London, United Kingdom
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19
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Bondurand N, Dufour S, Pingault V. News from the endothelin-3/EDNRB signaling pathway: Role during enteric nervous system development and involvement in neural crest-associated disorders. Dev Biol 2018; 444 Suppl 1:S156-S169. [PMID: 30171849 DOI: 10.1016/j.ydbio.2018.08.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/27/2018] [Accepted: 08/27/2018] [Indexed: 01/08/2023]
Abstract
The endothelin system is a vertebrate-specific innovation with important roles in regulating the cardiovascular system and renal and pulmonary processes, as well as the development of the vertebrate-specific neural crest cell population and its derivatives. This system is comprised of three structurally similar 21-amino acid peptides that bind and activate two G-protein coupled receptors. In 1994, knockouts of the Edn3 and Ednrb genes revealed their crucial function during development of the enteric nervous system and melanocytes, two neural-crest derivatives. Since then, human and mouse genetics, combined with cellular and developmental studies, have helped to unravel the role of this signaling pathway during development and adulthood. In this review, we will summarize the known functions of the EDN3/EDNRB pathway during neural crest development, with a specific focus on recent scientific advances, and the enteric nervous system in normal and pathological conditions.
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Affiliation(s)
- Nadege Bondurand
- Laboratory of Embryology and Genetics of Congenital Malformations, INSERM U1163, Institut Imagine, Paris, France; Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France.
| | - Sylvie Dufour
- INSERM, U955, Equipe 06, Créteil 94000, France; Université Paris Est, Faculté de Médecine, Créteil 94000, France
| | - Veronique Pingault
- Laboratory of Embryology and Genetics of Congenital Malformations, INSERM U1163, Institut Imagine, Paris, France; Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France; Service de Génétique Moléculaire, Hôpital Necker-Enfants Malades, Assistance Publique - Hôpitaux de Paris, Paris, France
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20
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Gomis-Coloma C, Velasco-Aviles S, Gomez-Sanchez JA, Casillas-Bajo A, Backs J, Cabedo H. Class IIa histone deacetylases link cAMP signaling to the myelin transcriptional program of Schwann cells. J Cell Biol 2018; 217:1249-1268. [PMID: 29472387 PMCID: PMC5881490 DOI: 10.1083/jcb.201611150] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 10/06/2017] [Accepted: 01/17/2018] [Indexed: 12/11/2022] Open
Abstract
Schwann cells respond to cyclic adenosine monophosphate (cAMP) halting proliferation and expressing myelin proteins. Here we show that cAMP signaling induces the nuclear shuttling of the class IIa histone deacetylase (HDAC)-4 in these cells, where it binds to the promoter and blocks the expression of c-Jun, a negative regulator of myelination. To do it, HDAC4 does not interfere with the transcriptional activity of MEF2. Instead, by interacting with NCoR1, it recruits HDAC3 and deacetylates histone 3 in the promoter of c-Jun, blocking gene expression. Importantly, this is enough to up-regulate Krox20 and start Schwann cell differentiation program-inducing myelin gene expression. Using conditional knockout mice, we also show that HDAC4 together with HDAC5 redundantly contribute to activate the myelin transcriptional program and the development of myelin sheath in vivo. We propose a model in which cAMP signaling shuttles class IIa HDACs into the nucleus of Schwann cells to regulate the initial steps of myelination in the peripheral nervous system.
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Affiliation(s)
- Clara Gomis-Coloma
- Instituto de Neurociencias de Alicante, Universidad Miguel Hernández and Consejo Superior de Investigaciones Científicas, Sant Joan, Alicante, Spain
- Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL) and Fundación para el Fomento de la Investigación Saniatria y Biomédica de la Comunidad Valenciana (FISABIO), Alicante, Spain
| | - Sergio Velasco-Aviles
- Instituto de Neurociencias de Alicante, Universidad Miguel Hernández and Consejo Superior de Investigaciones Científicas, Sant Joan, Alicante, Spain
- Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL) and Fundación para el Fomento de la Investigación Saniatria y Biomédica de la Comunidad Valenciana (FISABIO), Alicante, Spain
| | - Jose A Gomez-Sanchez
- Instituto de Neurociencias de Alicante, Universidad Miguel Hernández and Consejo Superior de Investigaciones Científicas, Sant Joan, Alicante, Spain
- Department of Cell and Developmental Biology, University College London, London, England, UK
| | - Angeles Casillas-Bajo
- Instituto de Neurociencias de Alicante, Universidad Miguel Hernández and Consejo Superior de Investigaciones Científicas, Sant Joan, Alicante, Spain
- Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL) and Fundación para el Fomento de la Investigación Saniatria y Biomédica de la Comunidad Valenciana (FISABIO), Alicante, Spain
| | - Johannes Backs
- Department of Molecular Cardiology and Epigenetics, University of Heidelberg, Heidelberg, Germany
- German Center for Cardiovascular Research, Partner Site Heidelberg/Mannheim, Germany
| | - Hugo Cabedo
- Instituto de Neurociencias de Alicante, Universidad Miguel Hernández and Consejo Superior de Investigaciones Científicas, Sant Joan, Alicante, Spain
- Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL) and Fundación para el Fomento de la Investigación Saniatria y Biomédica de la Comunidad Valenciana (FISABIO), Alicante, Spain
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21
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Elevated serum levels of endothelin-1 in patients with chronic inflammatory demyelinating polyneuropathy. Clin Chim Acta 2018; 476:49-53. [DOI: 10.1016/j.cca.2017.11.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 11/11/2017] [Indexed: 12/18/2022]
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22
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Aquino JB, Sierra R. Schwann cell precursors in health and disease. Glia 2017; 66:465-476. [PMID: 29124786 DOI: 10.1002/glia.23262] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 10/07/2017] [Accepted: 10/26/2017] [Indexed: 12/25/2022]
Abstract
Schwann cell precursors (SCPs) are frequently regarded as neural crest-derived cells (NCDCs) found in contact with axons during nerve formation. Nevertheless, cells with SCPs properties can be found up to the adulthood. They are well characterized with regard to both gene expression profile and cellular behavior -for instance, proliferation, migratory capabilities and survival requirements-. They differ in origin regarding their anatomic location: even though most of them are derived from migratory NCCs, there is also contribution of the boundary cap neural crest cells (bNCCs) to the skin and other tissues. Many functions are known for SCPs in normal development, including nerve fasciculation and target innervation, arterial branching patterning and differentiation, and other morphogenetic processes. In addition, SCPs are now known to be a source of many neural (glia, endoneural fibroblasts, melanocytes, visceral neurons, and chromaffin cells) and non-neural-like (mesenchymal stromal cells, able e.g., to generate dentine-producing odontoblasts) cell types. Until now no reports of endoderm-like derivatives were reported so far. Interestingly, in the Schwann cell lineage only early SCPs are likely able to differentiate into melanocytes and bone marrow mesenchymal stromal cells. We have also herein discussed the literature regarding their role in repair as well as in disease mechanisms, such as in diverse cancers. Moreover, many caveats in our knowledge of SCPs biology are highlighted all through this article. Future research should expand more into the relevance of SCPs in pathologies and in other regenerative mechanisms which might bring new unexpected clinically-relevant knowledge.
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Affiliation(s)
- Jorge B Aquino
- Developmental Biology & Regenerative Medicine Laboratory, Instituto de Investigaciones en Medicina Traslacional (IIMT), CONICET-Universidad Austral, Derqui-Pilar, Buenos Aires, Argentina
| | - Romina Sierra
- Developmental Biology & Regenerative Medicine Laboratory, Instituto de Investigaciones en Medicina Traslacional (IIMT), CONICET-Universidad Austral, Derqui-Pilar, Buenos Aires, Argentina
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23
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Kim HS, Lee J, Lee DY, Kim YD, Kim JY, Lim HJ, Lim S, Cho YS. Schwann Cell Precursors from Human Pluripotent Stem Cells as a Potential Therapeutic Target for Myelin Repair. Stem Cell Reports 2017; 8:1714-1726. [PMID: 28506533 PMCID: PMC5469943 DOI: 10.1016/j.stemcr.2017.04.011] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 04/08/2017] [Accepted: 04/10/2017] [Indexed: 01/18/2023] Open
Abstract
Schwann cells play a crucial role in successful nerve repair and regeneration by supporting both axonal growth and myelination. However, the sources of human Schwann cells are limited both for studies of Schwann cell development and biology and for the development of treatments for Schwann cell-associated diseases. Here, we provide a rapid and scalable method to produce self-renewing Schwann cell precursors (SCPs) from human pluripotent stem cells (hPSCs), using combined sequential treatment with inhibitors of the TGF-β and GSK-3 signaling pathways, and with neuregulin-1 for 18 days under chemically defined conditions. Within 1 week, hPSC-derived SCPs could be differentiated into immature Schwann cells that were functionally confirmed by their secretion of neurotrophic factors and their myelination capacity in vitro and in vivo. We propose that hPSC-derived SCPs are a promising, unlimited source of functional Schwann cells for treating demyelination disorders and injuries to the peripheral nervous system. hPSC-SCPs are highly expandable under chemically defined medium condition hPSC-SCPs can rapidly and efficiently differentiate into functional Schwann cells SCP-SCs myelinate axon and secrete various neurotrophic factors SCP-SCs promote axonal regeneration in sciatic nerve-damaged mice
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Affiliation(s)
- Han-Seop Kim
- Stem Cell Research Laboratory, Immunotherapy Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Jungwoon Lee
- Stem Cell Research Laboratory, Immunotherapy Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Da Yong Lee
- Rare Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Young-Dae Kim
- Stem Cell Research Laboratory, Immunotherapy Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Jae Yun Kim
- Stem Cell Research Laboratory, Immunotherapy Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Bioscience, KRIBB School, University of Science & Technology, 113 Gwahak-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Hyung Jin Lim
- Stem Cell Research Laboratory, Immunotherapy Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Bioscience, KRIBB School, University of Science & Technology, 113 Gwahak-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Sungmin Lim
- Stem Cell Research Laboratory, Immunotherapy Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Bioscience, KRIBB School, University of Science & Technology, 113 Gwahak-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Yee Sook Cho
- Stem Cell Research Laboratory, Immunotherapy Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Bioscience, KRIBB School, University of Science & Technology, 113 Gwahak-ro, Yuseong-gu, Daejeon 34113, Republic of Korea.
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Brinkmann BG, Quintes S. Zeb2: Inhibiting the inhibitors in Schwann cells. NEUROGENESIS 2017; 4:e1271495. [PMID: 28203609 DOI: 10.1080/23262133.2016.1271495] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 12/02/2016] [Accepted: 12/06/2016] [Indexed: 10/20/2022]
Abstract
Development of Schwann cells is tightly regulated by concerted action of activating and inhibiting factors. Most of the regulatory feedback loops identified to date are transcriptional activators promoting induction of genes coding for integral myelin proteins and lipids. The mechanisms by which inhibitory factors are silenced during Schwann cell maturation are less well understood. We could recently show a pivotal function for the transcription factor zinc finger E-box binding homeobox 2 (Zeb2) during Schwann cell development and myelination as a transcriptional repressor of maturation inhibitors. Zeb2 belongs to a family of highly conserved 2-handed zinc-finger proteins and represses gene transcription by binding to E-box sequences in the regulatory region of target genes. The protein is known to repress E-cadherin during epithelial to mesenchymal transition (EMT) in tumor malignancy and mediates its functions by interacting with multiple co-factors. During nervous system development, Zeb2 is expressed in neural crest cells, the precursors of Schwann cells, the myelinating glial cells of peripheral nerves. Schwann cells lacking Zeb2 fail to fully differentiate and are unable to sort and myelinate peripheral nerve axons. The maturation inhibitors Sox2, Ednrb and Hey2 emerge as targets for Zeb2-mediated transcriptional repression and show persistent aberrant expression in Zeb2-deficient Schwann cells. While dispensible for adult Schwann cells, re-activation of Zeb2 is essential after nerve injury to allow remyelination and functional recovery. In summary, Zeb2 emerges as an "inhibitor of inhibitors," a novel concept in Schwann cell development and nerve repair.
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Affiliation(s)
- Bastian G Brinkmann
- Max Planck Institute of Experimental Medicine, Department of Neurogenetics , Göttingen, Germany
| | - Susanne Quintes
- Max Planck Institute of Experimental Medicine, Department of Neurogenetics, Göttingen, Germany; University Medical Center Göttingen (UMG), Department of Clinical Neurophysiology, Göttingen, Germany
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Quintes S, Brinkmann BG. Transcriptional inhibition in Schwann cell development and nerve regeneration. Neural Regen Res 2017; 12:1241-1246. [PMID: 28966633 PMCID: PMC5607813 DOI: 10.4103/1673-5374.213537] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Schwann cells, the myelinating glial cells of the peripheral nervous system are remarkably plastic after nerve trauma. Their transdifferentiation into specialized repair cells after injury shares some features with their development from the neural crest. Both processes are governed by a tightly regulated balance between activators and inhibitors to ensure timely lineage progression and allow re-maturation after nerve injury. Functional recovery after injury is very successful in rodents, however, in humans, lack of regeneration after nerve trauma and loss of function as the result of peripheral neuropathies represents a significant problem. Our understanding of the basic molecular machinery underlying Schwann cell maturation and plasticity has made significant progress in recent years and novel players have been discovered. While the transcriptional activators of Schwann cell development and nerve repair have been well defined, the mechanisms counteracting negative regulation of (re-)myelination are less well understood. Recently, transcriptional inhibition has emerged as a new regulatory mechanism in Schwann cell development and nerve repair. This mini-review summarizes some of the regulatory mechanisms controlling both processes and the novel concept of “inhibiting the inhibitors” in the context of Schwann cell plasticity.
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Affiliation(s)
- Susanne Quintes
- Max-Planck-Institute of Experimental Medicine, Department of Neurogenetics, Göttingen, Germany.,Department of Clinical Neurophysiology, University Medical Center Göttingen (UMG), Göttingen, Germany
| | - Bastian G Brinkmann
- Max-Planck-Institute of Experimental Medicine, Department of Neurogenetics, Göttingen, Germany
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26
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Quintes S, Brinkmann BG, Ebert M, Fröb F, Kungl T, Arlt FA, Tarabykin V, Huylebroeck D, Meijer D, Suter U, Wegner M, Sereda MW, Nave KA. Zeb2 is essential for Schwann cell differentiation, myelination and nerve repair. Nat Neurosci 2016; 19:1050-1059. [PMID: 27294512 PMCID: PMC4964942 DOI: 10.1038/nn.4321] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Accepted: 05/04/2016] [Indexed: 12/12/2022]
Abstract
Schwann cell development and peripheral nerve myelination require the serial expression of transcriptional activators, such as Sox10, Oct6 (also called Scip or Pou3f1) and Krox20 (also called Egr2). Here we show that transcriptional repression, mediated by the zinc-finger protein Zeb2 (also known as Sip1), is essential for differentiation and myelination. Mice lacking Zeb2 in Schwann cells develop a severe peripheral neuropathy, caused by failure of axonal sorting and virtual absence of myelin membranes. Zeb2-deficient Schwann cells continuously express repressors of lineage progression. Moreover, genes for negative regulators of maturation such as Sox2 and Ednrb emerge as Zeb2 target genes, supporting its function as an 'inhibitor of inhibitors' in myelination control. When Zeb2 is deleted in adult mice, Schwann cells readily dedifferentiate following peripheral nerve injury and become repair cells. However, nerve regeneration and remyelination are both perturbed, demonstrating that Zeb2, although undetectable in adult Schwann cells, has a latent function throughout life.
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Affiliation(s)
- Susanne Quintes
- Max Planck Institute of Experimental Medicine, Department of
Neurogenetics, Göttingen, Germany
- University Medical Center Göttingen (UMG), Department of
Clinical Neurophysiology, Göttingen, Germany
| | - Bastian G Brinkmann
- Max Planck Institute of Experimental Medicine, Department of
Neurogenetics, Göttingen, Germany
| | - Madlen Ebert
- Max Planck Institute of Experimental Medicine, Department of
Neurogenetics, Göttingen, Germany
| | - Franziska Fröb
- Institut für Biochemie, Emil-Fischer-Zentrum,
Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen,
Germany
| | - Theresa Kungl
- Max Planck Institute of Experimental Medicine, Department of
Neurogenetics, Göttingen, Germany
| | - Friederike A Arlt
- Max Planck Institute of Experimental Medicine, Department of
Neurogenetics, Göttingen, Germany
| | - Victor Tarabykin
- Institute for Cell and Neurobiology, Center for Anatomy,
Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Danny Huylebroeck
- Laboratory of Molecular Biology (Celgen), Department of Development
and Regeneration, KU Leuven, Leuven, Belgium
- Department of Cell Biology, Erasmus University Medical Center,
Rotterdam, The Netherlands
| | - Dies Meijer
- Centre for Neuroregeneration, University of Edinburgh, Edinburgh,
United Kingdom
| | - Ueli Suter
- Institute of Molecular Health Sciences, Department of Biology, ETH
Zürich, Zürich, Switzerland
| | - Michael Wegner
- Institut für Biochemie, Emil-Fischer-Zentrum,
Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen,
Germany
| | - Michael W Sereda
- Max Planck Institute of Experimental Medicine, Department of
Neurogenetics, Göttingen, Germany
- University Medical Center Göttingen (UMG), Department of
Clinical Neurophysiology, Göttingen, Germany
| | - Klaus-Armin Nave
- Max Planck Institute of Experimental Medicine, Department of
Neurogenetics, Göttingen, Germany
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Uesaka T, Young HM, Pachnis V, Enomoto H. Development of the intrinsic and extrinsic innervation of the gut. Dev Biol 2016; 417:158-67. [PMID: 27112528 DOI: 10.1016/j.ydbio.2016.04.016] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 04/09/2016] [Accepted: 04/21/2016] [Indexed: 12/16/2022]
Abstract
The gastrointestinal (GI) tract is innervated by intrinsic enteric neurons and by extrinsic efferent and afferent nerves. The enteric (intrinsic) nervous system (ENS) in most regions of the gut consists of two main ganglionated layers; myenteric and submucosal ganglia, containing numerous types of enteric neurons and glial cells. Axons arising from the ENS and from extrinsic neurons innervate most layers of the gut wall and regulate many gut functions. The majority of ENS cells are derived from vagal neural crest cells (NCCs), which proliferate, colonize the entire gut, and first populate the myenteric region. After gut colonization by vagal NCCs, the extrinsic nerve fibers reach the GI tract, and Schwann cell precursors (SCPs) enter the gut along the extrinsic nerves. Furthermore, a subpopulation of cells in myenteric ganglia undergoes a radial (inward) migration to form the submucosal plexus, and the intrinsic and extrinsic innervation to the mucosal region develops. Here, we focus on recent progress in understanding the developmental processes that occur after the gut is colonized by vagal ENS precursors, and provide an up-to-date overview of molecular mechanisms regulating the development of the intrinsic and extrinsic innervation of the GI tract.
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Affiliation(s)
- Toshihiro Uesaka
- Division of Neural Differentiation and Regeneration, Department of Physiology and Cell Biology, Graduate School of Medicine, Kobe University, Kobe 650-0017, Japan; Laboratory for Neuronal Differentiation and Regeneration, RIKEN Center for Developmental Biology, Kobe 650-0047, Japan; Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Saitama 332-0012, Japan.
| | - Heather M Young
- Department of Anatomy and Neuroscience, University of Melbourne, 3010 VIC, Australia
| | - Vassilis Pachnis
- Division of Molecular Neurobiology, MRC National Institute for Medical Research, The Ridgeway, Mill Hill, London NW7 1AA, United Kingdom
| | - Hideki Enomoto
- Division of Neural Differentiation and Regeneration, Department of Physiology and Cell Biology, Graduate School of Medicine, Kobe University, Kobe 650-0017, Japan; Laboratory for Neuronal Differentiation and Regeneration, RIKEN Center for Developmental Biology, Kobe 650-0047, Japan; Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Saitama 332-0012, Japan
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Hotta R, Cheng L, Graham H, Pan W, Nagy N, Belkind-Gerson J, Goldstein AM. Isogenic enteric neural progenitor cells can replace missing neurons and glia in mice with Hirschsprung disease. Neurogastroenterol Motil 2016; 28:498-512. [PMID: 26685978 PMCID: PMC4808355 DOI: 10.1111/nmo.12744] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 11/04/2015] [Indexed: 12/22/2022]
Abstract
BACKGROUND Transplanting autologous patient-derived enteric neuronal stem/progenitor cells (ENSCs) is an innovative approach to replacing missing enteric neurons in patients with Hirschsprung disease (HSCR). Using autologous cells eliminates immunologic and ethical concerns raised by other cell sources. However, whether postnatal aganglionic bowel is permissive for transplanted ENSCs and whether ENSCs from HSCR patients can be successfully isolated, cultured, and transplanted in vivo remains unknown. METHODS ENSCs isolated from the ganglionic intestine of Ednrb(-/-) mice (HSCR-ENSCs) were characterized immunohistochemically and evaluated for their capacity to proliferate and differentiate in vitro. Fluorescently labeled ENSCs were co-cultured ex vivo with aganglionic Ednrb(-/-) colon. For in vivo transplantation, HSCR-ENSCs were labeled with lentivirus expressing green fluorescent protein (GFP) and implanted into aganglionic embryonic chick gut in ovo and postnatal aganglionic Ednrb(-/-) rectum in vivo. KEY RESULTS HSCR-ENSCs maintain normal capacity self-renewal and neuronal differentiation. Moreover, the Ednrb(-/-) aganglionic environment is permissive to engraftment by wild-type ENSCs ex vivo and supports migratrion and neuroglial differentiation of these cells following transplantation in vivo. Lentiviral GFP-labeled HSCR-ENSCs populated embryonic chick hindgut and postnatal colon of Ednrb(-/-) HSCR, with cells populating the intermuscular layer and forming enteric neurons and glia. CONCLUSIONS & INFERENCES ENSCs can be isolated and cultured from mice with HSCR, and transplanted into the aganglionic bowel of HSCR littermates to generate enteric neuronal networks. These results in an isogenic model establish the potential of using autologous-derived stem cells to treat HSCR and other intestinal neuropathies.
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Affiliation(s)
| | | | | | | | | | | | - Allan M. Goldstein
- ,Corresponding Author: Allan M. Goldstein, Massachusetts General Hospital, Warren 1153, Boston, MA 02114, Tel: 617-726-0270, Fax: 617-726-2167,
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Xie D, Croaker GDH, Li J, Song ZM. Reduced cell proliferation and increased apoptosis in the hippocampal formation in a rat model of Hirschsprung's disease. Brain Res 2016; 1642:79-86. [PMID: 27017960 DOI: 10.1016/j.brainres.2016.03.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 02/26/2016] [Accepted: 03/15/2016] [Indexed: 12/22/2022]
Abstract
Hirschsprung's disease (HSCR) is a congenital malformation characterized by the absence of enteric ganglia in the distal intestine and gut obstruction. Some HSCR patients also have associated neurological symptoms. We studied a rat model of HSCR, also known as spotting lethal (sl/sl) rat, which carries a spontaneous deletion in the gene of endothelin receptor B (EDNRB) and a similar phenotype as humans with HSCR. We focused on the changes in cell proliferation and apoptosis in the hippocampal formation of the sl/sl rat. Proliferating cells in wildtype (+/+), heterozygous (+/sl) and homozygous (sl/sl) rats were labelled by intraperitoneal injection of 5-bromo-2'-deoxyuridine (BrdU) at postnatal day 2. The density of proliferating cells in the CA1 and CA3 regions of the hippocampus and dentate gyrus of sl/sl rats was significantly reduced compared to +/+ rats. The effect of EDNRB mutation on cell apoptosis was examined by using terminal deoxynucleotidyl transferase-mediated dUTP nick end-labelling assay. This showed that the density of apoptotic cells in the hippocampal formation, particularly in the CA1 region of sl/sl rats, was significantly increased compared to +/+ rats. The expression of brain derived neurotrophic factor (BDNF) and glial cell line-derived neurotrophic factor (GDNF) was measured with ELISA in the hippocampal formation, but no difference was revealed between genotypes. These results suggest that EDNRB mutation reduces cell proliferation and increases apoptosis in the hippocampal formation of the sl/sl rat, but does not alter the levels of BDNF and GDNF. Our findings provide an insight into the cellular changes in the brains of HSCR patients caused by EDNRB mutation.
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Affiliation(s)
- Dan Xie
- Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; Eccles Institute of Neuroscience, John Curtin School of Medical Research, the Australian National University, Canberra, ACT, Australia
| | - G David H Croaker
- Department of Paediatric Surgery, The Canberra Hospital, Canberra, ACT, Australia
| | - Jimei Li
- Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Zan-Min Song
- Eccles Institute of Neuroscience, John Curtin School of Medical Research, the Australian National University, Canberra, ACT, Australia; Medical School, the Australian National University, Canberra, ACT, Australia.
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Abstract
Schwann cells develop from the neural crest in a well-defined sequence of events. This involves the formation of the Schwann cell precursor and immature Schwann cells, followed by the generation of the myelin and nonmyelin (Remak) cells of mature nerves. This review describes the signals that control the embryonic phase of this process and the organogenesis of peripheral nerves. We also discuss the phenotypic plasticity retained by mature Schwann cells, and explain why this unusual feature is central to the striking regenerative potential of the peripheral nervous system (PNS).
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Affiliation(s)
- Kristján R Jessen
- Department of Cell and Developmental Biology, University College London, London WC1E 6BT, United Kingdom
| | - Rhona Mirsky
- Department of Cell and Developmental Biology, University College London, London WC1E 6BT, United Kingdom
| | - Alison C Lloyd
- MRC Laboratory for Molecular Cell Biology, University College London, London WC1E 6BT, United Kingdom
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Schmid D, Zeis T, Schaeren-Wiemers N. Transcriptional regulation induced by cAMP elevation in mouse Schwann cells. ASN Neuro 2014; 6:137-57. [PMID: 24641305 PMCID: PMC4834722 DOI: 10.1042/an20130031] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 01/16/2014] [Accepted: 02/05/2014] [Indexed: 12/23/2022] Open
Abstract
In peripheral nerves, Schwann cell development is regulated by a variety of signals. Some of the aspects of Schwann cell differentiation can be reproduced in vitro in response to forskolin, an adenylyl cyclase activator elevating intracellular cAMP levels. Herein, the effect of forskolin treatment was investigated by a comprehensive genome-wide expression study on primary mouse Schwann cell cultures. Additional to myelin-related genes, many so far unconsidered genes were ascertained to be modulated by forskolin. One of the strongest differentially regulated gene transcripts was the transcription factor Olig1 (oligodendrocyte transcription factor 1), whose mRNA expression levels were reduced in treated Schwann cells. Olig1 protein was localized in myelinating and nonmyelinating Schwann cells within the sciatic nerve as well as in primary Schwann cells, proposing it as a novel transcription factor of the Schwann cell lineage. Data analysis further revealed that a number of differentially expressed genes in forskolin-treated Schwann cells were associated with the ECM (extracellular matrix), underlining its importance during Schwann cell differentiation in vitro. Comparison of samples derived from postnatal sciatic nerves and from both treated and untreated Schwann cell cultures showed considerable differences in gene expression between in vivo and in vitro, allowing us to separate Schwann cell autonomous from tissue-related changes. The whole data set of the cell culture microarray study is provided to offer an interactive search tool for genes of interest.
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Key Words
- camp
- forskolin
- in vitro
- microarray
- schwann cell differentiation
- bmp, bone morphogenetic protein
- camp, cyclic adenosine monophosphate
- cns, central nervous system
- creb, camp-response-element-binding protein
- david, database for annotation, visualization and integrated discovery
- dgc, dystrophin–glycoprotein complex
- ecm, extracellular matrix
- fdr, false discovery rate
- go, gene ontology
- ipa, ingenuity pathway analysis
- mag, myelin-associated glycoprotein
- mapk, mitogen-activated protein kinase
- mbp, myelin basic protein
- mpz/p0, myelin protein zero
- nf-κb, nuclear factor κb
- olig1, oligodendrocyte transcription factor 1
- pca, principal component analysis
- pfa, paraformaldehyde
- pka, protein kinase a
- pns, peripheral nervous system
- qrt–pcr, quantitative rt–pcr
- s.d., standard deviation
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Affiliation(s)
- Daniela Schmid
- *Neurobiology, Department of Biomedicine, University Hospital Basel,
University of Basel, Hebelstrasse 20, CH-4031 Basel, Switzerland
| | - Thomas Zeis
- *Neurobiology, Department of Biomedicine, University Hospital Basel,
University of Basel, Hebelstrasse 20, CH-4031 Basel, Switzerland
| | - Nicole Schaeren-Wiemers
- *Neurobiology, Department of Biomedicine, University Hospital Basel,
University of Basel, Hebelstrasse 20, CH-4031 Basel, Switzerland
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Gisser JM, Cohen AR, Yin H, Gariepy CE. A novel bidirectional interaction between endothelin-3 and retinoic acid in rat enteric nervous system precursors. PLoS One 2013; 8:e74311. [PMID: 24040226 PMCID: PMC3767828 DOI: 10.1371/journal.pone.0074311] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 08/02/2013] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND Signaling through the endothelin receptor B (EDNRB) is critical for the development of the enteric nervous system (ENS) and mutations in endothelin system genes cause Hirschsprung's aganglionosis in humans. Penetrance of the disease is modulated by other genetic factors. Mutations affecting retinoic acid (RA) signaling also produce aganglionosis in mice. Thus, we hypothesized that RA and endothelin signaling pathways may interact in controlling development of the ENS. METHODS Rat immunoselected ENS precursor cells were cultured with the EDNRB ligand endothelin-3, an EDNRB-selective antagonist (BQ-788), and/or RA for 3 or 14 days. mRNA levels of genes related to ENS development, RA- and EDNRB-signaling were measured at 3 days. Proliferating cells and cells expressing neuronal, glial, and myofibroblast markers were quantified. RESULTS Culture of isolated ENS precursors for 3 days with RA decreases expression of the endothelin-3 gene and that of its activation enzyme. These changes are associated with glial proliferation, a higher percentage of glia, and a lower percentage of neurons compared to cultures without RA. These changes are independent of EDNRB signaling. Conversely, EDNRB activation in these cultures decreases expression of RA receptors β and γ mRNA and affects the expression of the RA synthetic and degradative enzymes. These gene expression changes are associated with reduced glial proliferation and a lower percentage of glia in the culture. Over 14 days in the absence of EDNRB signaling, RA induces the formation of a heterocellular plexus replete with ganglia, glia and myofibroblasts. CONCLUSIONS A complex endothelin-RA interaction exists that coordinately regulates the development of rat ENS precursors in vitro. These results suggest that environmental RA may modulate the expression of aganglionosis in individuals with endothelin mutations.
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Affiliation(s)
- Jonathan M. Gisser
- The Center for Molecular and Human Genetics, the Research Institute at Nationwide Children’s Hospital, Columbus, Ohio, United States of America
- Department of Pediatrics, the Ohio State University, Columbus, Ohio, United States of America
| | - Ariella R. Cohen
- The Center for Molecular and Human Genetics, the Research Institute at Nationwide Children’s Hospital, Columbus, Ohio, United States of America
| | - Han Yin
- The Biostatistics Shared Resources, Nationwide Children’s Hospital, Columbus, Ohio, United States of America
| | - Cheryl E. Gariepy
- The Center for Molecular and Human Genetics, the Research Institute at Nationwide Children’s Hospital, Columbus, Ohio, United States of America
- Department of Pediatrics, the Ohio State University, Columbus, Ohio, United States of America
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Abstract
The fundamental roles of Schwann cells during peripheral nerve formation and regeneration have been recognized for more than 100 years, but the cellular and molecular mechanisms that integrate Schwann cell and axonal functions continue to be elucidated. Derived from the embryonic neural crest, Schwann cells differentiate into myelinating cells or bundle multiple unmyelinated axons into Remak fibers. Axons dictate which differentiation path Schwann cells follow, and recent studies have established that axonal neuregulin1 signaling via ErbB2/B3 receptors on Schwann cells is essential for Schwann cell myelination. Extracellular matrix production and interactions mediated by specific integrin and dystroglycan complexes are also critical requisites for Schwann cell-axon interactions. Myelination entails expansion and specialization of the Schwann cell plasma membrane over millimeter distances. Many of the myelin-specific proteins have been identified, and transgenic manipulation of myelin genes have provided novel insights into myelin protein function, including maintenance of axonal integrity and survival. Cellular events that facilitate myelination, including microtubule-based protein and mRNA targeting, and actin based locomotion, have also begun to be understood. Arguably, the most remarkable facet of Schwann cell biology, however, is their vigorous response to axonal damage. Degradation of myelin, dedifferentiation, division, production of axonotrophic factors, and remyelination all underpin the substantial regenerative capacity of the Schwann cells and peripheral nerves. Many of these properties are not shared by CNS fibers, which are myelinated by oligodendrocytes. Dissecting the molecular mechanisms responsible for the complex biology of Schwann cells continues to have practical benefits in identifying novel therapeutic targets not only for Schwann cell-specific diseases but other disorders in which axons degenerate.
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Affiliation(s)
- Grahame J Kidd
- Department of Neuroscience, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA.
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Critical period of axoglial signaling between neuregulin-1 and brain-derived neurotrophic factor required for early Schwann cell survival and differentiation. J Neurosci 2011; 31:9630-40. [PMID: 21715628 DOI: 10.1523/jneurosci.1659-11.2011] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
During peripheral nervous system development, successful communication between axons and Schwann cells is required for proper function of both myelinated and nonmyelinated nerve fibers. Alternatively spliced proteins belonging to the neuregulin1 (NRG1) gene family of growth and differentiation factors are essential for Schwann cell survival and peripheral nerve development. Although recent studies have strongly implicated membrane-bound NRG1 forms (type III) in the myelination at late stages, little is known about the role of soluble, heparin-binding forms of NRG1 (type I/II) in regulating early Schwann cell development in vivo. These forms are rapidly released from axons in vitro by Schwann-cell-secreted neurotrophic factors and, unlike membrane-bound forms, have a unique ability to diffuse and adhere to heparan sulfate-rich cell surfaces. Here, we show that axon-derived soluble NRG1 translocates from axonal to Schwann cell surfaces in the embryonic chick between days 5 and 7, corresponding to the critical period of Schwann cell survival. Downregulating endogenous type I/II NRG1 signaling either with a targeted NRG1 antagonist or by shRNA blocks their differentiation from precursors into immature Schwann cells and increases programmed cell death, whereas upregulating NRG1 rescues Schwann cells. Exogenous BDNF also promotes Schwann cell survival through promoting the local release of axonal NRG1. Consistently, increased Schwann cell death occurs both in trkB knock-out mice and after knocking down axonal trkB in chick embryos, which can then be rescued with soluble NRG1. These findings suggest a localized, axoglial feedback loop through soluble NRG1 and BDNF critical for early Schwann cell survival and differentiation.
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35
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Adameyko I, Lallemend F. Glial versus melanocyte cell fate choice: Schwann cell precursors as a cellular origin of melanocytes. Cell Mol Life Sci 2010; 67:3037-55. [PMID: 20454996 PMCID: PMC11115498 DOI: 10.1007/s00018-010-0390-y] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2010] [Revised: 04/20/2010] [Accepted: 04/26/2010] [Indexed: 12/12/2022]
Abstract
Melanocytes and Schwann cells are derived from the multipotent population of neural crest cells. Although both cell types were thought to be generated through completely distinct pathways and molecular processes, a recent study has revealed that these different cell types are intimately interconnected far beyond previously postulated limits in that they share a common post-neural crest progenitor, i.e. the Schwann cell precursor. This finding raises interesting questions about the lineage relationships of hitherto unrelated cell types such as melanocytes and Schwann cells, and may provide clinical insights into mechanisms of pigmentation disorders and for cancer involving Schwann cells and melanocytes.
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Affiliation(s)
- Igor Adameyko
- Unit of Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institute, Scheeles väg 1-A1-plan2, 171 77 Stockholm, Sweden
| | - Francois Lallemend
- Unit of Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institute, Scheeles väg 1-A1-plan2, 171 77 Stockholm, Sweden
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36
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Abstract
In the postnatal brain, oligodendrocyte progenitor cells (OPCs) arise from the subventricular zone (SVZ) and migrate into the developing white matter, where they differentiate into oligodendrocytes and myelinate axons. The mechanisms regulating OPC migration and differentiation are not fully defined. The present study demonstrates that endothelin-1 (ET-1) is an astrocyte-derived signal that regulates OPC migration and differentiation. OPCs in vivo and in culture express functional ET(A) and ET(B) receptors, which mediate ET-1-induced ERK (extracellular signal-regulated kinase) and CREB (cAMP response element-binding protein) phosphorylation. ET-1 exerts both chemotactic and chemokinetic effects on OPCs to enhance cell migration; it also prevents lineage progression from the O4(+) to the O1(+) stage without affecting cell proliferation. Astrocyte-conditioned medium stimulates OPC migration in culture through ET receptor activation, whereas multiphoton time-lapse imaging shows that selective ET receptor antagonists or anti-ET-1 antibodies inhibit OPC migration from the SVZ. Inhibition of ET receptor activity also derepresses OPC differentiation in the corpus callosum in slice cultures. Our findings indicate that ET-1 is a soluble astrocyte-derived signal that regulates OPC migration and differentiation during development.
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Woodhoo A, Alonso MBD, Droggiti A, Turmaine M, D'Antonio M, Parkinson DB, Wilton DK, Al-Shawi R, Simons P, Shen J, Guillemot F, Radtke F, Meijer D, Feltri ML, Wrabetz L, Mirsky R, Jessen KR. Notch controls embryonic Schwann cell differentiation, postnatal myelination and adult plasticity. Nat Neurosci 2009; 12:839-47. [PMID: 19525946 PMCID: PMC2782951 DOI: 10.1038/nn.2323] [Citation(s) in RCA: 239] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2009] [Accepted: 03/30/2009] [Indexed: 11/09/2022]
Abstract
Notch signaling is central to vertebrate development, and analysis of Notch has provided important insights into pathogenetic mechanisms in the CNS and many other tissues. However, surprisingly little is known about the role of Notch in the development and pathology of Schwann cells and peripheral nerves. Using transgenic mice and cell cultures, we found that Notch has complex and extensive regulatory functions in Schwann cells. Notch promoted the generation of Schwann cells from Schwann cell precursors and regulated the size of the Schwann cell pool by controlling proliferation. Notch inhibited myelination, establishing that myelination is subject to negative transcriptional regulation that opposes forward drives such as Krox20. Notably, in the adult, Notch dysregulation resulted in demyelination; this finding identifies a signaling pathway that induces myelin breakdown in vivo. These findings are relevant for understanding the molecular mechanisms that control Schwann cell plasticity and underlie nerve pathology, including demyelinating neuropathies and tumorigenesis.
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Affiliation(s)
- Ashwin Woodhoo
- Department of Cell and Developmental Biology, University College London, UK
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Woodhoo A, Sommer L. Development of the Schwann cell lineage: from the neural crest to the myelinated nerve. Glia 2009; 56:1481-1490. [PMID: 18803317 DOI: 10.1002/glia.20723] [Citation(s) in RCA: 162] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The myelinating and nonmyelinating Schwann cells in peripheral nerves are derived from the neural crest, which is a transient and multipotent embryonic structure that also generates the other main glial subtypes of the peripheral nervous system (PNS). Schwann cell development occurs through a series of transitional embryonic and postnatal phases, which are tightly regulated by a number of signals. During the early embryonic phases, neural crest cells are specified to give rise to Schwann cell precursors, which represent the first transitional stage in the Schwann cell lineage, and these then generate the immature Schwann cells. At birth, the immature Schwann cells differentiate into either the myelinating or nonmyelinating Schwann cells that populate the mature nerve trunks. In this review, we will discuss the biology of the transitional stages in embryonic and early postnatal Schwann cell development, including the phenotypic differences between them and the recently identified signaling pathways, which control their differentiation and maintenance. In addition, the role and importance of the microenvironment in which glial differentiation takes place will be discussed.
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Affiliation(s)
- Ashwin Woodhoo
- Department of Anatomy and Developmental Biology, University College London, London, United Kingdom.
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Mirsky R, Woodhoo A, Parkinson DB, Arthur-Farraj P, Bhaskaran A, Jessen KR. Novel signals controlling embryonic Schwann cell development, myelination and dedifferentiation. J Peripher Nerv Syst 2008; 13:122-35. [PMID: 18601657 DOI: 10.1111/j.1529-8027.2008.00168.x] [Citation(s) in RCA: 147] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Immature Schwann cells found in perinatal rodent nerves are generated from Schwann cell precursors (SCPs) that originate from the neural crest. Immature Schwann cells generate the myelinating and non-myelinating Schwann cells of adult nerves. When axons degenerate following injury, Schwann cells demyelinate, proliferate and dedifferentiate to assume a molecular phenotype similar to that of immature cells, a process essential for successful nerve regeneration. Increasing evidence indicates that Schwann cell dedifferentiation involves activation of specific receptors, intracellular signalling pathways and transcription factors in a manner analogous to myelination. We have investigated the roles of Notch and the transcription factor c-Jun in development and after nerve transection. In vivo, Notch signalling regulates the transition from SCP to Schwann cell, times Schwann cell generation, controls Schwann cell proliferation and acts as a brake on myelination. Notch is elevated in injured nerves where it accelerates the rate of dedifferentiation. Likewise, the transcription factor c-Jun is required for Schwann cell proliferation and death and is down-regulated by Krox-20 on myelination. Forced expression of c-Jun in Schwann cells prevents myelination, and in injured nerves, c-Jun is required for appropriate dedifferentiation, the re-emergence of the immature Schwann cell state and nerve regeneration. Thus, both Notch and c-Jun are negative regulators of myelination. The growing realisation that myelination is subject to negative as well as positive controls and progress in molecular identification of negative regulators is likely to impact on our understanding of demyelinating disease and mechanisms that control nerve repair.
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Affiliation(s)
- Rhona Mirsky
- Department of Cell and Developmental Biology, University College London, London, UK.
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40
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Vidovic M, Chen MM, Lu QY, Kalloniatis KF, Martin BM, Tan AHY, Lynch C, Croaker GDH, Cass DT, Song ZM. Deficiency in endothelin receptor B reduces proliferation of neuronal progenitors and increases apoptosis in postnatal rat cerebellum. Cell Mol Neurobiol 2008; 28:1129-38. [PMID: 18683040 DOI: 10.1007/s10571-008-9292-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2007] [Accepted: 06/17/2008] [Indexed: 12/19/2022]
Abstract
Endothelins regulate cellular functions in the mammalian brain through the endothelin receptors A and B (EDNRA and EDNRB). In this study, we investigated the role of EDNRB on cell proliferation in the cerebellum by using the spotting lethal (sl) rat, which carries a naturally occurring deletion in the EDNRB gene. Proliferating cells in the three genotypes, wild-type (+/+), heterozygous (+/sl) and homozygous mutant (sl/sl) rats were labelled by intraperitoneal injection of 5-bromo-2'-deoxyuridine (BrdU) at postnatal day 2. The density of BrdU-positive cells (per mm(2)) in the external germinal layer of sl/sl rats (Mean +/- SEM, 977 +/- 388) was significantly reduced compared to +/+ (4915 +/- 631) and +/sl (2304 +/- 557) rats. Subsequently, we examined the effects of EDNRB mutation on neural apoptosis by terminal deoxynucleotidyltransferase-mediated dUTP nick end-labelling assay. This showed that the density of apoptotic cells in the cerebella of sl/sl rats (9.3 +/- 0.5/mm(2)) was significantly more increased than +/+ rats (4 +/- 0.7). The expression of brain-derived neurotrophic factor (BDNF) and glial cell line-derived neurotrophic factor (GDNF) were measured with standard ELISA, but were unchanged in all genotypes. These results suggest that ENDRB mediates neural proliferation and have anti-apoptotic effects in the cerebellum of the postnatal rat, and that these effects are independent of changes in the expression of BDNF and GDNF. Our findings will lead to better understanding of the morphological changes in the cerebellum of Hirschsprung's disease patients with congenital EDNRB mutation.
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Affiliation(s)
- Maria Vidovic
- Division of Neuroscience, John Curtin School of Medical Research, Australian National University, Canberra, ACT 0200, Australia
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41
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Lehmann C, Eisner F, Engele J. Role of endothelins as mediators of injury-induced alterations of glial glutamate turnover. J Neurosci Res 2008; 86:660-7. [PMID: 17893916 DOI: 10.1002/jnr.21512] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Astroglia terminate glutamatergic neurotransmission and prevent excitotoxic extracellular glutamate concentration by clearing synaptically released glutamate through the high-affinity, sodium-dependent glutamate transporters GLT-1 and GLAST. Many brain injures are associated with the disturbed expression of glial glutamate transporters and a subsequent increase of extracellular glutamate to neurotoxic levels. We have now followed up initial hints pointing to endothelins, a family of injury-regulated peptides, as mediators of this injury-induced loss of glial glutamate transporter expression. We observed that, in line with such a role, endothelins not only act as potent inhibitors of basal and exogenously (dbcAMP)-induced expression of GLT-1 in cortical astrocytes as shown before, but likewise inhibit expression of GLT-1 or GLAST in astrocytes cultured from the diencephalon, mesencephalon, cerebellum, and spinal cord. We further demonstrate that endothelins equally inhibit GLT-1 expression in cortical slice cultures, a culture system closely resembling the in vivo situation. Although brain injuries are usually associated with an increase in the expression of the glutamate-converting enzyme glutamine synthetase, cultured cortical astrocytes maintained with endothelins showed an almost complete loss of glutamine synthetase. Interestingly, the inhibitory effects of endothelins on the expression of glutamine synthetase, but not of glutamate transporters, was overridden by high extracellular glutamate, indicating that the primarily inhibitory action of endothelins on the various components of glial glutamate turnover dissociates in the injured brain.
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Affiliation(s)
- Claudia Lehmann
- Institute of Anatomy, University of Leipzig, Medical Faculty, Leipzig, Germany
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42
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Loreti S, Vilaró MT, Visentin S, Rees H, Levey AI, Tata AM. Rat Schwann cells express M1-M4 muscarinic receptor subtypes. J Neurosci Res 2006; 84:97-105. [PMID: 16634060 DOI: 10.1002/jnr.20874] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The expression of different muscarinic receptor subtypes was analyzed in immature Schwann cells obtained from sciatic nerve of 2-day neonatal rats. By using RT-PCR analysis, we demonstrated the presence of M1, M2, M3, and M4 receptor subtypes in cultured Schwann cells, with M2 displaying the highest expression levels. Muscarinic subtypes were also quantified by immunoprecipitation and [3H]QNB binding. With this approach, we found the levels of receptor expression to be M2 > M3 > M1. M4 is expressed at very low levels, and M5 receptor was not detectable. Moreover, we also demonstrated that stimulation of the receptors by muscarinic agonists activates previously described signal transduction pathways, leading to a decrease of cAMP and an increase of IP3 levels not associated with an efficient intracellular Ca2+ release. The presence and activity of particular muscarinic receptors in immature Schwann cells suggest that ACh may play an important role in Schwann cell development.
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MESH Headings
- Analysis of Variance
- Animals
- Animals, Newborn
- Blotting, Northern/methods
- Calcium/metabolism
- Cells, Cultured
- Colforsin/pharmacology
- Gene Expression/drug effects
- Gene Expression/physiology
- Immunoprecipitation/methods
- In Situ Hybridization/methods
- Inositol 1,4,5-Trisphosphate/metabolism
- RNA, Messenger/metabolism
- Rats
- Rats, Wistar
- Receptors, Muscarinic/classification
- Receptors, Muscarinic/genetics
- Receptors, Muscarinic/metabolism
- Reverse Transcriptase Polymerase Chain Reaction/methods
- Schwann Cells/drug effects
- Schwann Cells/metabolism
- Sciatic Nerve/cytology
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Affiliation(s)
- Simona Loreti
- Department of Cell and Developmental Biology, University La Sapienza, Rome, Italy
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Ohno N, Terada N, Yamakawa H, Komada M, Ohara O, Trapp BD, Ohno S. Expression of protein 4.1G in Schwann cells of the peripheral nervous system. J Neurosci Res 2006; 84:568-77. [PMID: 16752423 DOI: 10.1002/jnr.20949] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The membrane-associated cytoskeletal proteins, including protein 4.1 family, play important roles in membrane integrity, protein targeting, and signal transduction. Although protein 4.1G (4.1G) is expressed ubiquitously in mammalian tissues, it can have very discrete distributions within cells. The present study investigated the expression and distributions of 4.1G in rodent sciatic nerve. Northern and Western blot analysis detected abundant 4.1G mRNA and protein in rat sciatic nerve extracts. Immunohistochemical staining with a 4.1G-specific antibody and double immunolabeling with E-cadherin, betaIV spectrin, and connexin 32 detected 4.1G in paranodal loops, Schmidt-Lanterman incisures, and periaxonal, mesaxonal, and abaxonal membranes of rodent sciatic nerve. Immunoelectron microscopy confirmed the immunodistribution of 4.1G in Schwann cells. In developing mouse sciatic nerves, 4.1G was diffusely distributed in immature Schwann cells and gradually localized at paranodes, incisures, and periaxonal and mesaxonal membranes during their maturation. These data support the concept that 4.1G plays an important role in the membrane expansion and specialization that occurs during formation and maintenance of myelin internodes in the peripheral nervous system.
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Affiliation(s)
- Nobuhiko Ohno
- Department of Anatomy, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo-City, Yamanashi, Japan
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Bhatheja K, Field J. Schwann cells: origins and role in axonal maintenance and regeneration. Int J Biochem Cell Biol 2006; 38:1995-9. [PMID: 16807057 DOI: 10.1016/j.biocel.2006.05.007] [Citation(s) in RCA: 204] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2006] [Revised: 05/17/2006] [Accepted: 05/18/2006] [Indexed: 11/18/2022]
Abstract
The Schwann cell plays a vital role in maintaining the peripheral nervous system (PNS). Schwann cells are derived from neural crest cells, and come in two types either myelinating or non-myelinating Schwann cells. Both play a pivotal role in the maintenance and regeneration of axons of the neurons in the PNS. The regulation of Schwann cells is mediated a number of different neurotrophic factors which signal to transcription factors such as Krox-20, Oct-6 and Sox-10. Schwann cells are affected in a number of demyelinating disorders, such as Charcot-Marie-Tooth disease and Guillain-Barré Syndrome, infected by Mycobacterium leprae to cause leprosy and are responsible for the tumors seen in patients with neurofibromatosis type 1 and neurofibromatosis type 2. The Schwann cell is under investigation as a therapeutic agent for demyelinating diseases and spinal cord injuries. Further research on Schwann cells will help understand these diseases and perhaps lead to new treatments.
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Affiliation(s)
- Kanav Bhatheja
- Department of Pharmacology, University of Pennsylvania School of Medicine, Philadelphia, PA 19041, USA
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45
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Stanchina L, Baral V, Robert F, Pingault V, Lemort N, Pachnis V, Goossens M, Bondurand N. Interactions between Sox10, Edn3 and Ednrb during enteric nervous system and melanocyte development. Dev Biol 2006; 295:232-49. [PMID: 16650841 DOI: 10.1016/j.ydbio.2006.03.031] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2005] [Revised: 03/20/2006] [Accepted: 03/21/2006] [Indexed: 12/11/2022]
Abstract
The requirement for SOX10 and endothelin-3/EDNRB signalling pathway during enteric nervous system (ENS) and melanocyte development, as well as their alterations in Waardenburg-Hirschsprung disease (hypopigmentation, deafness and absence of enteric ganglia) are well established. Here, we analysed the genetic interactions between these genes during ENS and melanocyte development. Through phenotype analysis of Sox10;Ednrb and Sox10;Edn3 double mutants, we show that a coordinate and balanced interaction between these molecules is required for normal ENS and melanocyte development. Indeed, double mutants present with a severe increase in white spotting, absence of melanocytes within the inner ear, and in the stria vascularis in particular, and more severe ENS defects. Moreover, we show that partial loss of Ednrb in Sox10 heterozygous mice impairs colonisation of the gut by enteric crest cells at all stages observed. However, compared to single mutants, we detected no apoptosis, cell proliferation or overall neuronal or glial differentiation defects in neural crest cells within the stomach of double mutants, but apoptosis was increased in vagal neural crest cells outside of the gut. These data will contribute to the understanding of the molecular basis of ENS, pigmentation and hearing defects observed in mouse mutants and patients carrying SOX10, EDN3 and EDNRB mutations.
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Affiliation(s)
- Laure Stanchina
- INSERM, U654, Bases moléculaires et cellulaires des maladies génétiques, Hôpital Henri Mondor, Creteil, F-94000, France; Université Paris 12, Faculté de Médecine, IFR10, Créteil, F-94000, France
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46
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Liu S, Tian Y, Chlenski A, Yang Q, Salwen HR, Cohn SL. ‘Cross-talk’ between Schwannian stroma and neuroblasts promotes neuroblastoma tumor differentiation and inhibits angiogenesis. Cancer Lett 2005; 228:125-31. [PMID: 15935552 DOI: 10.1016/j.canlet.2005.01.056] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2004] [Accepted: 01/12/2005] [Indexed: 11/30/2022]
Abstract
Neuroblastoma (NB) tumors with abundant Schwannian stroma have a differentiated phenotype, low vascularity, and are associated with a favorable prognosis. These observations have led to the hypothesis that 'cross-talk' between Schwann cells and neuroblasts influences the biology and clinical behavior of NB tumors. In support of this hypothesis, laboratory studies have shown that factors secreted by Schwann cells are capable of promoting NB differentiation, inhibiting angiogenesis, and impairing NB growth. Recently, using a novel NB xenograft model that was designed to directly investigate the affects of infiltrating Schwann cells, we demonstrated that infiltrating mouse Schwann cells can directly impact the phenotype of human NB xenografts in vivo. Taken together, these studies indicate that tumor-stroma interactions are critical in determining the biology of NB tumors. Further research investigating the molecules involved in the 'cross-talk' between Schwann cells and neuroblasts may lead to new treatment strategies that will modify tumor biology and alter the clinically aggressive nature of Schwannian stroma-poor NB tumors.
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Affiliation(s)
- Shuqing Liu
- Department of Pediatrics, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL, USA
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Abstract
During the development of peripheral nerves, neural crest cells generate myelinating and non-myelinating glial cells in a process that parallels gliogenesis from the germinal layers of the CNS. Unlike central gliogenesis, neural crest development involves a protracted embryonic phase devoted to the generation of, first, the Schwann cell precursor and then the immature Schwann cell, a cell whose fate as a myelinating or non-myelinating cell has yet to be determined. Embryonic nerves therefore offer a particular opportunity to analyse the early steps of gliogenesis from transient multipotent stem cells, and to understand how this process is integrated with organogenesis of peripheral nerves.
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Affiliation(s)
- Kristjan R Jessen
- Department of Anatomy and Developmental Biology, University College London, Gower Street, London WC1E 6BT, UK.
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48
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Abstract
Compressive neuropathies are highly prevalent, debilitating conditions with variable functional recovery after surgical decompression. Chronic nerve compression injury induces concurrent Schwann cell proliferation and apoptosis in the early stages of the disorder, independent of axonal injury. These proliferating Schwann cells locally demyelinate and remyelinate in the region of injury. Furthermore, Schwann cells upregulate vascular endothelial growth factor secondary to chronic nerve compression injury and induce neovascularization to facilitate the recruitment of macrophages. In contrast to Wallerian degeneration, macrophage recruitment occurs gradually with chronic nerve compression injury and continues for a longer time. Schwann cells change their gene and protein expression in response to mechanical stimuli as shear stress decreases the expression of myelin associated glycoprotein and myelin basic protein mRNA and protein for in vitro promyelinating Schwann cells. The local down-regulation of myelin associated glycoprotein in the region of compression injury creates an environment allowing axonal sprouting that may be reversed with intraneural injections of purified myelin associated glycoprotein. These studies suggest that while the reciprocal relationship between neurons and glial cells is maintained, chronic nerve compression injury is a Schwann cell-mediated disease.
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Affiliation(s)
- Ranjan Gupta
- Department of Orthopaedic Surgery, Center for Biomedical Engineering in the Henry Samueli School of Engineering, University of California, Irvine, CA 92697, USA.
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49
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Rozyczka J, Figiel M, Engele J. Chronic endothelin exposure inhibits connexin43 expression in cultured cortical astroglia. J Neurosci Res 2005; 79:303-9. [PMID: 15605384 DOI: 10.1002/jnr.20355] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Severe brain lesions are accompanied by sustained increases in endothelin (ET) levels, which in turn profoundly affect brain microcirculation and neural cell function. A known response of astrocytes to acute increases in ET levels is the rapid and transient closure of gap junctions and the subsequent decrease of gap junction-mediated intercellular communication (GJIC). Because evidence exists that the loss of GJIC alters astrocytic gene expression, we analyzed the effects of chronic ET exposure on astrocytic gap junction coupling. We found that within 24 hr, cultured cortical astrocytes respond to low nanomolar concentrations (2-10 nM) of either ET-1 or ET-3 with a robust inhibition of connexin (Cx)43 expression, the major junctional protein in astrocytes, and a subsequent decline of GIJC. We further observed that in the continuous presence of ETs, Cx43 expression remained inhibited for at least 7 days. In addition, a similar decrease of Cx43 expression occurred in cultured spinal cord astrocytes maintained with ET-1 for 3 days. Applying ETs in combination with the highly selective ETA and ETB receptor antagonists, BQ123 and BQ788, respectively, revealed that the inhibitory influences on astrocytic Cx43 expression depend on activation of ETB receptors. We suggest that the observed ET-dependent inhibition of Cx43 expression and the resulting decline of GJIC might represent a major pathway by which ETs regulate astrocytic gene expression in the injured brain.
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Affiliation(s)
- Joanna Rozyczka
- Institute of Anatomy, University of Leipzig, Medical Faculty, Leipzig, Germany
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50
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Loesch A, Gajkowska B, Dashwood MR, Fioretto ET, Gagliardo KM, Lima ARD, Ribeiro AACM. Endothelin-1 and endothelin receptors in the basilar artery of the capybara. J Mol Histol 2005; 36:25-34. [PMID: 15703996 DOI: 10.1007/s10735-004-2912-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2004] [Revised: 09/02/2004] [Indexed: 11/26/2022]
Abstract
Little is known about cerebral vasculature of capybara, which seems may serve as a natural model of studying changes in cerebral circulation due to internal carotid artery atrophy at animal sexual maturation. This is the first study of the light- and electron-immunocytochemical localisation of endothelin-1 (ET-1) and ETA and ETB endothelin receptors in the basilar artery of capybaras (6 to 12-month-old females and males) using an ExtrAvidin detection method. All animals examined showed similar patterns of immunoreactivity. Immunoreactivity for ET-1 was detected in the endothelium and adventitial fibroblasts, whilst immunoreactivity for ETA and ETB receptors was present in the endothelium, vascular smooth muscle, perivascular nerves and fibroblasts. In endothelial cells immunoreactivity to ET-1 was pronounced in the cytoplasm or on the granular endoplasmic reticulum. Similar patterns of immunolabelling were observed for ETA and ETB receptors, though cytoplasmic location of clusters of immunoprecipitate seems dominant. These results suggest that the endothelin system is present throughout the wall of the basilar artery of capybara.
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Affiliation(s)
- Andrzej Loesch
- Department of Anatomy and Developmental Biology (Royal Free Campus), Royal Free and University College Medical School, University College London, Rowland Hill Street, London, UK, NW3 2PF,
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