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Rgs4 is a regulator of mTOR activity required for motoneuron axon outgrowth and neuronal development in zebrafish. Sci Rep 2021; 11:13338. [PMID: 34172795 PMCID: PMC8233358 DOI: 10.1038/s41598-021-92758-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 06/15/2021] [Indexed: 12/21/2022] Open
Abstract
The Regulator of G protein signaling 4 (Rgs4) is a member of the RGS proteins superfamily that modulates the activity of G-protein coupled receptors. It is mainly expressed in the nervous system and is linked to several neuronal signaling pathways; however, its role in neural development in vivo remains inconclusive. Here, we generated and characterized a rgs4 loss of function model (MZrgs4) in zebrafish. MZrgs4 embryos showed motility defects and presented reduced head and eye sizes, reflecting defective motoneurons axon outgrowth and a significant decrease in the number of neurons in the central and peripheral nervous system. Forcing the expression of Rgs4 specifically within motoneurons rescued their early defective outgrowth in MZrgs4 embryos, indicating an autonomous role for Rgs4 in motoneurons. We also analyzed the role of Akt, Erk and mechanistic target of rapamycin (mTOR) signaling cascades and showed a requirement for these pathways in motoneurons axon outgrowth and neuronal development. Drawing on pharmacological and rescue experiments in MZrgs4, we provide evidence that Rgs4 facilitates signaling mediated by Akt, Erk and mTOR in order to drive axon outgrowth in motoneurons and regulate neuronal numbers.
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2
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Patel BB, Clark KL, Kozik EM, Dash L, Kuhlman JA, Sakaguchi DS. Isolation and culture of primary embryonic zebrafish neural tissue. J Neurosci Methods 2019; 328:108419. [PMID: 31472190 DOI: 10.1016/j.jneumeth.2019.108419] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 08/23/2019] [Accepted: 08/27/2019] [Indexed: 10/26/2022]
Abstract
BACKGROUND Primary cell culture is a valuable tool to utilize in parallel with in vivo studies in order to maximize our understanding of the mechanisms surrounding neurogenesis and central nervous system (CNS) regeneration and plasticity. The zebrafish is an important model for biomedical research and primary neural cells are readily obtainable from their embryonic stages viatissue dissociation. Further, transgenic reporter lines with cell type-specific expression allows for observation of distinct cell populations within the dissociated tissue. NEW METHOD Here, we define an efficient method for ex vivo quantification and characterization of neuronal and glial tissue dissociated from embryonic zebrafish. RESULTS Zebrafish brain dissociated cells have been documented to survive in culture for at least 9 days in vitro (div). Anti-HuC/D and anti-Acetylated Tubulin antibodies were used to identify neurons in culture; at 3 div approximately 48% of cells were HuC/D positive and 85% expressed serotonin, suggesting our protocol can efficiently isolate neurons from whole embryonic zebrafish brains. Live time-lapse imaging was also carried out to analyze cell migration in vitro. COMPARISON WITH EXISTING METHODS Primary cultures of zebrafish neural cells typically have low rates of survivability in vitro. We have developed a culture system that has long term cell viability, enabling direct analysis of cell-cell and cell-extracellular matrix interactions. CONCLUSIONS These results demonstrate a practical method for isolating, dissociating and culturing of embryonic zebrafish neural tissue. This approach could further be utilized to better understand zebrafish regeneration in vitro.
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Affiliation(s)
- Bhavika B Patel
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA 50011, United States; Neuroscience Program, United States
| | - Kendra L Clark
- Department of Animal Science, Iowa State University, Ames, IA 50011, United States; Genetics and Genomics Program, United States
| | - Emily M Kozik
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA 50011, United States
| | - Linkan Dash
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA 50011, United States; Genetics and Genomics Program, United States
| | - Julie A Kuhlman
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA 50011, United States.
| | - Donald S Sakaguchi
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA 50011, United States; Neuroscience Program, United States.
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Abstract
The neural crest is an embryonic cell population induced at the border of the neural plate from where it delaminates and migrates long distances across the embryo. Due to its extraordinary migratory capabilities, the neural crest has become a powerful system to study cellular and molecular aspects of collective and single cell migration both in vivo and in vitro. Here we provide detailed protocols used to perform quantitative analysis of molecular and cellular aspects of Xenopus laevis neural crest cell migration, both in vivo and in vitro.
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Ciarlo C, Kaufman CK, Kinikoglu B, Michael J, Yang S, D Amato C, Blokzijl-Franke S, den Hertog J, Schlaeger TM, Zhou Y, Liao E, Zon LI. A chemical screen in zebrafish embryonic cells establishes that Akt activation is required for neural crest development. eLife 2017; 6:29145. [PMID: 28832322 PMCID: PMC5599238 DOI: 10.7554/elife.29145] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 08/08/2017] [Indexed: 01/09/2023] Open
Abstract
The neural crest is a dynamic progenitor cell population that arises at the border of neural and non-neural ectoderm. The inductive roles of FGF, Wnt, and BMP at the neural plate border are well established, but the signals required for subsequent neural crest development remain poorly characterized. Here, we conducted a screen in primary zebrafish embryo cultures for chemicals that disrupt neural crest development, as read out by crestin:EGFP expression. We found that the natural product caffeic acid phenethyl ester (CAPE) disrupts neural crest gene expression, migration, and melanocytic differentiation by reducing Sox10 activity. CAPE inhibits FGF-stimulated PI3K/Akt signaling, and neural crest defects in CAPE-treated embryos are suppressed by constitutively active Akt1. Inhibition of Akt activity by constitutively active PTEN similarly decreases crestin expression and Sox10 activity. Our study has identified Akt as a novel intracellular pathway required for neural crest differentiation.
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Affiliation(s)
- Christie Ciarlo
- Stem Cell Program and Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, United States.,Harvard Medical School, Boston, United States
| | - Charles K Kaufman
- Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, United States.,Department of Developmental Biology, Washington University School of Medicine, St. Louis, United States
| | - Beste Kinikoglu
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, United States.,Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Boston, United States
| | - Jonathan Michael
- Stem Cell Program and Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, United States
| | - Song Yang
- Stem Cell Program and Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, United States
| | - Christopher D Amato
- Stem Cell Program and Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, United States
| | - Sasja Blokzijl-Franke
- Hubrecht Institute, Koninklijke Nederlandse Akademie van Wetenschappen, University Medical Center Utrecht, Utrecht, Netherlands
| | - Jeroen den Hertog
- Hubrecht Institute, Koninklijke Nederlandse Akademie van Wetenschappen, University Medical Center Utrecht, Utrecht, Netherlands
| | - Thorsten M Schlaeger
- Stem Cell Program and Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, United States
| | - Yi Zhou
- Stem Cell Program and Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, United States
| | - Eric Liao
- Harvard Medical School, Boston, United States.,Center for Regenerative Medicine, Massachusetts General Hospital, Boston, United States.,Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Boston, United States.,Harvard Stem Cell Institute, Cambridge, United States
| | - Leonard I Zon
- Stem Cell Program and Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, United States.,Harvard Medical School, Boston, United States.,Harvard Stem Cell Institute, Cambridge, United States
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5
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Ibrahim M, Richardson MK. Beyond organoids: In vitro vasculogenesis and angiogenesis using cells from mammals and zebrafish. Reprod Toxicol 2017; 73:292-311. [PMID: 28697965 DOI: 10.1016/j.reprotox.2017.07.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 06/12/2017] [Accepted: 07/05/2017] [Indexed: 12/24/2022]
Abstract
The ability to culture complex organs is currently an important goal in biomedical research. It is possible to grow organoids (3D organ-like structures) in vitro; however, a major limitation of organoids, and other 3D culture systems, is the lack of a vascular network. Protocols developed for establishing in vitro vascular networks typically use human or rodent cells. A major technical challenge is the culture of functional (perfused) networks. In this rapidly advancing field, some microfluidic devices are now getting close to the goal of an artificially perfused vascular network. Another development is the emergence of the zebrafish as a complementary model to mammals. In this review, we discuss the culture of endothelial cells and vascular networks from mammalian cells, and examine the prospects for using zebrafish cells for this objective. We also look into the future and consider how vascular networks in vitro might be successfully perfused using microfluidic technology.
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Affiliation(s)
- Muhammad Ibrahim
- Animal Science and Health Cluster, Institute of Biology Leiden, Leiden University, The Netherlands; Institute of Biotechnology and Genetic Engineering, The University of Agriculture, Peshawar, Pakistan
| | - Michael K Richardson
- Animal Science and Health Cluster, Institute of Biology Leiden, Leiden University, The Netherlands.
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Naylor RW, McGhee CNJ, Cowan CA, Davidson AJ, Holm TM, Sherwin T. Derivation of Corneal Keratocyte-Like Cells from Human Induced Pluripotent Stem Cells. PLoS One 2016; 11:e0165464. [PMID: 27792791 PMCID: PMC5085044 DOI: 10.1371/journal.pone.0165464] [Citation(s) in RCA: 22] [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: 06/19/2016] [Accepted: 10/12/2016] [Indexed: 12/11/2022] Open
Abstract
Corneal diseases such as keratoconus represent a relatively common disorder in the human population. However, treatment is restricted to corneal transplantation, which only occurs in the most advanced cases. Cell based therapies may offer an alternative approach given that the eye is amenable to such treatments and corneal diseases like keratoconus have been associated specifically with the death of corneal keratocytes. The ability to generate corneal keratocytes in vitro may enable a cell-based therapy to treat patients with keratoconus. Human induced pluripotent stem cells (hiPSCs) offer an abundant supply of cells from which any cell in the body can be derived. In the present study, hiPSCs were successfully differentiated into neural crest cells (NCCs), the embryonic precursor to keratocytes, and then cultured on cadaveric corneal tissue to promote keratocyte differentiation. The hiPSC-derived NCCs were found to migrate into the corneal stroma where they acquired a keratocyte-like morphology and an expression profile similar to corneal keratocytes in vivo. These results indicate that hiPSCs can be used to generate corneal keratocytes in vitro and lay the foundation for using these cells in cornea cell-based therapies.
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Affiliation(s)
- Richard W. Naylor
- Department of Ophthalmology, University of Auckland, Auckland 1142, New Zealand
| | | | - Chad A. Cowan
- Harvard Stem Cell Institute, Harvard University, Cambridge, Massachusetts 02138, United States of America
| | - Alan J. Davidson
- Department of Molecular Medicine and Pathology, University of Auckland, Auckland 1142, New Zealand
| | - Teresa M. Holm
- Harvard Stem Cell Institute, Harvard University, Cambridge, Massachusetts 02138, United States of America
- * E-mail: (TS); (TH)
| | - Trevor Sherwin
- Department of Ophthalmology, University of Auckland, Auckland 1142, New Zealand
- * E-mail: (TS); (TH)
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Lopez E, Berenguer M, Tingaud-Sequeira A, Marlin S, Toutain A, Denoyelle F, Picard A, Charron S, Mathieu G, de Belvalet H, Arveiler B, Babin PJ, Lacombe D, Rooryck C. Mutations in MYT1, encoding the myelin transcription factor 1, are a rare cause of OAVS. J Med Genet 2016; 53:752-760. [PMID: 27358179 DOI: 10.1136/jmedgenet-2016-103774] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 05/26/2016] [Accepted: 06/01/2016] [Indexed: 01/09/2023]
Abstract
BACKGROUND Oculo-auriculo-vertebral spectrum (OAVS) is a developmental disorder involving first and second branchial arches derivatives, mainly characterised by asymmetric ear anomalies, hemifacial microsomia, ocular defects and vertebral malformations. Although numerous chromosomal abnormalities have been associated with OAVS, no causative gene has been identified so far. OBJECTIVES We aimed to identify the first causative gene for OAVS. METHODS As sporadic cases are mostly described in Goldenhar syndrome, we have performed whole exome sequencing (WES) on selected affected individuals and their unaffected parents, looking for de novo mutations. Candidate gene was tested through transient knockdown experiment in zebrafish using a morpholino-based approach. A functional test was developed in cell culture in order to assess deleterious consequences of mutations. RESULTS By WES, we identified a heterozygous nonsense mutation in one patient in the myelin transcription factor 1 (MYT1) gene. Further, we detected one heterozygous missense mutation in another patient among a cohort of 169 patients with OAVS. This gene encodes the MYT1. Functional studies by transient knockdown of myt1a, homologue of MYT1 in zebrafish, led to specific craniofacial cartilage alterations. Treatment with all-trans retinoic acid (RA), a known teratogenic agent causing OAVS, led to an upregulation of cellular endogenous MYT1 expression. Additionally, cellular wild-type MYT1 overexpression induced a downregulation of RA receptor β (RARB), whereas mutated MYT1 did not. CONCLUSION We report MYT1 as the first gene implicated in OAVS, within the RA signalling pathway.
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Affiliation(s)
- Estelle Lopez
- University of Bordeaux, Maladies Rares: Génétique et Métabolisme (MRGM), U 1211 INSERM, Bordeaux, France
| | - Marie Berenguer
- University of Bordeaux, Maladies Rares: Génétique et Métabolisme (MRGM), U 1211 INSERM, Bordeaux, France
| | - Angèle Tingaud-Sequeira
- University of Bordeaux, Maladies Rares: Génétique et Métabolisme (MRGM), U 1211 INSERM, Bordeaux, France
| | - Sandrine Marlin
- Département de Génétique, Hôpital Universitaire Necker-Enfants-Malades, Centre de Référence des Surdités Génétiques, Paris, France
| | - Annick Toutain
- Service de Génétique, Hôpital Bretonneau, Centre Hospitalier Universitaire, Tours, France
| | - Françoise Denoyelle
- Service d'ORL pédiatrique et de chirurgie cervicofaciale, Hôpital Universitaire Necker-Enfants-Malades, Centre de Référence des malformations ORL rares, Paris, France
| | - Arnaud Picard
- Service de chirurgie maxillo-faciale, Hôpital Universitaire Necker-Enfants Malades, Paris, France
| | - Sabine Charron
- University of Bordeaux, Maladies Rares: Génétique et Métabolisme (MRGM), U 1211 INSERM, Bordeaux, France
| | - Guilaine Mathieu
- University of Bordeaux, Maladies Rares: Génétique et Métabolisme (MRGM), U 1211 INSERM, Bordeaux, France
| | - Harmony de Belvalet
- University of Bordeaux, Maladies Rares: Génétique et Métabolisme (MRGM), U 1211 INSERM, Bordeaux, France
| | - Benoit Arveiler
- University of Bordeaux, Maladies Rares: Génétique et Métabolisme (MRGM), U 1211 INSERM, Bordeaux, France.,Service de Génétique Médicale, CHU de Bordeaux, Centre de Référence Anomalies du Développement et Syndromes Malformatifs, Bordeaux, France
| | - Patrick J Babin
- University of Bordeaux, Maladies Rares: Génétique et Métabolisme (MRGM), U 1211 INSERM, Bordeaux, France
| | - Didier Lacombe
- University of Bordeaux, Maladies Rares: Génétique et Métabolisme (MRGM), U 1211 INSERM, Bordeaux, France.,Service de Génétique Médicale, CHU de Bordeaux, Centre de Référence Anomalies du Développement et Syndromes Malformatifs, Bordeaux, France
| | - Caroline Rooryck
- University of Bordeaux, Maladies Rares: Génétique et Métabolisme (MRGM), U 1211 INSERM, Bordeaux, France.,Service de Génétique Médicale, CHU de Bordeaux, Centre de Référence Anomalies du Développement et Syndromes Malformatifs, Bordeaux, France
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8
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Abstract
Zebrafish embryonic cell cultures have many useful properties that make them complementary to intact embryos for a wide range of studies. Embryonic cell cultures allow for maintenance of transient cell populations, control of chemical and mechanical cues received by cells, and facile chemical screening. Zebrafish cells can be cultured in either heterogeneous or homogeneous cultures from a wide range of developmental time points. Here we describe two methods with particular applicability to chemical screening: a method for the culture of blastomeres for directed differentiation toward the myogenic lineage and a method for the culture of neural crest cells in heterogeneous cultures from early somitogenesis embryos.
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Affiliation(s)
- C A Ciarlo
- Harvard Medical School and Children's Hospital, Boston, MA, United States
| | - L I Zon
- Children's Hospital and Dana Farber Cancer Institute, Boston, MA, United States; Harvard University, Cambridge, MA, United States
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9
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Oct4 overexpression facilitates proliferation of porcine fibroblasts and development of cloned embryos. ZYGOTE 2014; 23:704-11. [PMID: 25181424 DOI: 10.1017/s0967199414000355] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Octamer-binding transcription factor 4 (Oct4) is a critical molecule for the self-renewal and pluripotency of embryonic stem cells. Recent reports have shown that Oct4 also controls cell-cycle progression and enhances the proliferation of various types of cells. As the high proliferation of donor fibroblasts is critical to the production of transgenic pigs, using the somatic cell nuclear transfer technique, we analysed the effect of Oct4 overexpression on the proliferation of porcine fibroblasts and embryos. Porcine endogenous Oct4 cDNA was cloned, sequenced and inserted into an expression vector. The vector was transfected into porcine fibroblasts, and a stable Oct4-overexpressed cell line was established by antibiotic selection. Oct4 expression was validated by the immunostaining of Oct4. Cell morphology was changed to sharp, and both proliferation and migration abilities were enhanced in Oct4-overexpressed cells. Real-time RT-PCR results showed that p16, Bcl2 and Myc were upregulated in Oct4-overexpressed cells. Somatic cell nuclear transfer was performed using Oct4-overexpressed cells, and the development of Oct4 embryos was compared with that of wild-type cloned embryos. The cleavage and blastocyst formation rates were improved in the Oct4 embryos. Interestingly, blastocyst formation of the Oct4 embryos was observed as early as day 5 in culture, while blastocysts were observed from day 6 in wild-type cloned embryos. In conclusion, the overexpression of Oct4 enhanced the proliferation of both porcine fibroblasts and embryos.
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Han L, Yang L, Liu B, Cheng X. Trans-caryophyllene suppresses tumor necrosis factor (TNFα)-induced inflammation in human chondrocytes. Eur Food Res Technol 2014. [DOI: 10.1007/s00217-014-2302-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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The ECM-cell interaction of cartilage extracellular matrix on chondrocytes. BIOMED RESEARCH INTERNATIONAL 2014; 2014:648459. [PMID: 24959581 PMCID: PMC4052144 DOI: 10.1155/2014/648459] [Citation(s) in RCA: 170] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 04/24/2014] [Indexed: 12/21/2022]
Abstract
Cartilage extracellular matrix (ECM) is composed primarily of the network type II collagen (COLII) and an interlocking mesh of fibrous proteins and proteoglycans (PGs), hyaluronic acid (HA), and chondroitin sulfate (CS). Articular cartilage ECM plays a crucial role in regulating chondrocyte metabolism and functions, such as organized cytoskeleton through integrin-mediated signaling via cell-matrix interaction. Cell signaling through integrins regulates several chondrocyte functions, including differentiation, metabolism, matrix remodeling, responses to mechanical stimulation, and cell survival. The major signaling pathways that regulate chondrogenesis have been identified as wnt signal, nitric oxide (NO) signal, protein kinase C (PKC), and retinoic acid (RA) signal. Integrins are a large family of molecules that are central regulators in multicellular biology. They orchestrate cell-cell and cell-matrix adhesive interactions from embryonic development to mature tissue function. In this review, we emphasize the signaling molecule effect and the biomechanics effect of cartilage ECM on chondrogenesis.
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