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Brooks PM, Lewis P, Million-Perez S, Yandulskaya AS, Khalil M, Janes M, Porco J, Walker E, Meyers JR. Pharmacological reprogramming of zebrafish lateral line supporting cells to a migratory progenitor state. Dev Biol 2024; 512:70-88. [PMID: 38729405 DOI: 10.1016/j.ydbio.2024.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 04/17/2024] [Accepted: 05/07/2024] [Indexed: 05/12/2024]
Abstract
In the zebrafish lateral line, non-sensory supporting cells readily re-enter the cell cycle to generate new hair cells and supporting cells during homeostatic maintenance and following damage to hair cells. This contrasts with supporting cells from mammalian vestibular and auditory sensory epithelia which rarely re-enter the cell cycle, and hence loss of hair cells results in permanent sensory deficit. Lateral line supporting cells are derived from multipotent progenitor cells that migrate down the trunk midline as a primordium and are deposited to differentiate into a neuromast. We have found that we can revert zebrafish support cells back to a migratory progenitor state by pharmacologically altering the signaling environment to mimic that of the migratory primordium, with active Wnt signaling and repressed FGF signaling. The reverted supporting cells migrate anteriorly and posteriorly along the horizontal myoseptum and will re-epithelialize to form an increased number of neuromasts along the midline when the pharmacological agents are removed. These data demonstrate that supporting cells can be readily reprogrammed to a migratory multipotent progenitor state that can form new sensory neuromasts, which has important implications for our understanding of how the lateral line system matures and expands in fish and also suggest avenues for returning mammalian supporting cells back to a proliferative state.
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Affiliation(s)
- Paige M Brooks
- Dept. of Biology and Program in Neuroscience, Colgate University, 13 Oak Drive, Hamilton, NY, 13346, USA
| | - Parker Lewis
- Dept. of Biology and Program in Neuroscience, Colgate University, 13 Oak Drive, Hamilton, NY, 13346, USA
| | - Sara Million-Perez
- Dept. of Biology and Program in Neuroscience, Colgate University, 13 Oak Drive, Hamilton, NY, 13346, USA
| | - Anastasia S Yandulskaya
- Dept. of Biology and Program in Neuroscience, Colgate University, 13 Oak Drive, Hamilton, NY, 13346, USA
| | - Mahmoud Khalil
- Dept. of Biology and Program in Neuroscience, Colgate University, 13 Oak Drive, Hamilton, NY, 13346, USA
| | - Meredith Janes
- Dept. of Biology and Program in Neuroscience, Colgate University, 13 Oak Drive, Hamilton, NY, 13346, USA
| | - Joseph Porco
- Dept. of Biology and Program in Neuroscience, Colgate University, 13 Oak Drive, Hamilton, NY, 13346, USA
| | - Eleanor Walker
- Dept. of Biology and Program in Neuroscience, Colgate University, 13 Oak Drive, Hamilton, NY, 13346, USA
| | - Jason R Meyers
- Dept. of Biology and Program in Neuroscience, Colgate University, 13 Oak Drive, Hamilton, NY, 13346, USA.
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2
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Tuz-Sasik MU, Manuel R, Boije H. Efferent axons in the zebrafish lateral line degenerate following sensory hair cell ablation. Mol Cell Neurosci 2023; 127:103900. [PMID: 37714280 DOI: 10.1016/j.mcn.2023.103900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 09/05/2023] [Accepted: 09/07/2023] [Indexed: 09/17/2023] Open
Abstract
The zebrafish lateral line is a frequently used model to study the mechanisms behind peripheral neuronal innervation of sensory organs and the regeneration thereof. The lateral line system consists of neuromasts, a cluster of protruding hair cells, which are innervated by sensory afferent and modulatory efferent neurons. These flow-sensing hair cells are similar to the hair cells in the mammalian ear. Though, while hair cell loss in humans is irreversible, the zebrafish neuromasts are regarded as the fastest regenerating structure in vertebrates, making them an ideal model to study regeneration. However, one component of the lateral line system, the efferent projections, has largely been omitted in regenerative studies. Here, for the first time, we bring insights into the fate of efferent axons during ablation and regeneration of the hair cells in the zebrafish lateral line. Our behavioral analysis showed functional recovery of hair cells and sensory transmission within 48 h and their regeneration were in line with previous studies. Analysis of the inhibitory efferent projections revealed that in approximately half the cases the inhibitory efferent axons degenerated, which was never observed for the sensory afferent axons. Quantification of hair cells following ablation suggests that the presence of mature hair cells in the neuromast may prevent axon degeneration. Within 120 h, degenerated efferent axons regenerated along the axonal tract of the lateral line. Reanalysis of published single cell neuromast data hinted to a role for Bdnf in the survival of efferent axons. However, sequestering Bdnf, blocking the Trk-receptors, and inhibiting the downstream ERK-signaling, did not induce axon degeneration, indicating that efferent survival is not mediated through neurotrophic factors. To further explore the relation between hair cells and efferent projections, we generated atoh1a mutants, where mature hair cells never form. In larvae lacking hair cells, inhibitory efferent projections were still present, following the tract of the sensory afferent without displaying any innervation. Our study reveal the fate of efferent innervation following hair cell ablation and provide insights into the inherent differences in regeneration between neurons in the peripheral and central nervous system.
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Affiliation(s)
- Melek Umay Tuz-Sasik
- Department of Immunology, Genetics and Pathology, Cell and Neurobiology, Uppsala University, Uppsala, Sweden
| | - Remy Manuel
- Department of Immunology, Genetics and Pathology, Cell and Neurobiology, Uppsala University, Uppsala, Sweden
| | - Henrik Boije
- Department of Immunology, Genetics and Pathology, Cell and Neurobiology, Uppsala University, Uppsala, Sweden.
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3
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Lin MJ, Lee CM, Hsu WL, Chen BC, Lee SJ. Macrophages Break Interneuromast Cell Quiescence by Intervening in the Inhibition of Schwann Cells in the Zebrafish Lateral Line. Front Cell Dev Biol 2022; 10:907863. [PMID: 35846366 PMCID: PMC9285731 DOI: 10.3389/fcell.2022.907863] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 05/16/2022] [Indexed: 11/13/2022] Open
Abstract
In the zebrafish lateral line system, interneuromast cells (INCs) between neuromasts are kept quiescent by underlying Schwann cells (SWCs). Upon severe injuries that cause the complete loss of an entire neuromast, INCs can occasionally differentiate into neuromasts but how they escape from the inhibition by SWCs is still unclear. Using a genetic/chemical method to ablate a neuromast precisely, we found that a small portion of larvae can regenerate a new neuromast. However, the residual regeneration capacity was hindered by inhibiting macrophages. Using in toto imaging, we further discovered heterogeneities in macrophage behavior and distribution along the lateral line. We witnessed the crawling of macrophages between the injured lateral line and SWCs during regeneration and between the second primordium and the first mature lateral line during development. It implies that macrophages may physically alleviate the nerve inhibition to break the dormancy of INCs during regeneration and development in the zebrafish lateral line.
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Affiliation(s)
- Meng-Ju Lin
- Department of Life Science, National Taiwan University, Taipei, Taiwan, R.O.C.
| | - Chia-Ming Lee
- Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan, R.O.C.
| | - Wei-Lin Hsu
- Department of Life Science, National Taiwan University, Taipei, Taiwan, R.O.C.
| | - Bi-Chang Chen
- Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan, R.O.C.
| | - Shyh-Jye Lee
- Department of Life Science, National Taiwan University, Taipei, Taiwan, R.O.C.
- Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei, Taiwan, R.O.C.
- Center for Biotechnology, National Taiwan University, Taipei, Taiwan, R.O.C.
- *Correspondence: Shyh-Jye Lee,
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4
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Riley SE, Feng Y, Hansen CG. Hippo-Yap/Taz signalling in zebrafish regeneration. NPJ Regen Med 2022; 7:9. [PMID: 35087046 PMCID: PMC8795407 DOI: 10.1038/s41536-022-00209-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 12/14/2021] [Indexed: 12/29/2022] Open
Abstract
The extent of tissue regeneration varies widely between species. Mammals have a limited regenerative capacity whilst lower vertebrates such as the zebrafish (Danio rerio), a freshwater teleost, can robustly regenerate a range of tissues, including the spinal cord, heart, and fin. The molecular and cellular basis of this altered response is one of intense investigation. In this review, we summarise the current understanding of the association between zebrafish regeneration and Hippo pathway function, a phosphorylation cascade that regulates cell proliferation, mechanotransduction, stem cell fate, and tumorigenesis, amongst others. We also compare this function to Hippo pathway activity in the regenerative response of other species. We find that the Hippo pathway effectors Yap/Taz facilitate zebrafish regeneration and that this appears to be latent in mammals, suggesting that therapeutically promoting precise and temporal YAP/TAZ signalling in humans may enhance regeneration and hence reduce morbidity.
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Affiliation(s)
- Susanna E Riley
- University of Edinburgh Centre for Inflammation Research, Institute for Regeneration and Repair, Queen's Medical Research Institute, Edinburgh bioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Yi Feng
- University of Edinburgh Centre for Inflammation Research, Institute for Regeneration and Repair, Queen's Medical Research Institute, Edinburgh bioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Carsten Gram Hansen
- University of Edinburgh Centre for Inflammation Research, Institute for Regeneration and Repair, Queen's Medical Research Institute, Edinburgh bioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK.
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5
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Seleit A, Ansai S, Yamahira K, Masengi KWA, Naruse K, Centanin L. Diversity of lateral line patterns and neuromast numbers in the genus Oryzias. J Exp Biol 2021; 224:273715. [PMID: 34897518 DOI: 10.1242/jeb.242490] [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: 02/25/2021] [Accepted: 11/19/2021] [Indexed: 11/20/2022]
Abstract
A remarkable diversity of lateral line patterns exists in adult teleost fishes, the basis of which is largely unknown. By analysing the lateral line patterns and organ numbers in 29 Oryzias species and strains we report a rapid diversification of the lateral line system within this genus. We show a strong dependence of lateral line elaboration (number of neuromasts per cluster, number of parallel lateral lines) on adult species body size irrespective of phylogenetic relationships. In addition, we report that the degree of elaboration of the anterior lateral line, posterior lateral line and caudal neuromast clusters is tightly linked within species, arguing for a globally coordinated mechanism controlling lateral line organ numbers and patterns. We provide evidence for a polygenic control over neuromast numbers and positioning in the genus Oryzias. Our data also indicate that the diversity in lateral lines can arise as a result of differences in patterning both during embryonic development and post-embryonically, where simpler embryonic patterns generate less complex adult patterns and organ numbers, arguing for a linkage between the two processes.
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Affiliation(s)
- Ali Seleit
- Laboratory of Clonal Analysis of Post-Embryonic Stem Cells, Centre for Organismal Studies (COS) Heidelberg, Im Neuenheimer Feld 230, Heidelberg Universität, 69120 Heidelberg, Germany.,The Hartmut Hoffmann-Berling International Graduate School of Molecular and Cellular Biology (HBIGS), University of Heidelberg, 69120Heidelberg, Germany
| | - Satoshi Ansai
- Laboratory of Bioresources, National Institute for Basic Biology Nishigonaka 38, Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - Kazunori Yamahira
- Tropical Biosphere Research Center, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan
| | - Kawilarang W A Masengi
- Faculty of Fisheries and Marine Science, Sam Ratulangi University, 95115 Manado, Indonesia
| | - Kiyoshi Naruse
- Laboratory of Bioresources, National Institute for Basic Biology Nishigonaka 38, Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - Lázaro Centanin
- Laboratory of Clonal Analysis of Post-Embryonic Stem Cells, Centre for Organismal Studies (COS) Heidelberg, Im Neuenheimer Feld 230, Heidelberg Universität, 69120 Heidelberg, Germany
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6
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Evaluating the Death and Recovery of Lateral Line Hair Cells Following Repeated Neomycin Treatments. Life (Basel) 2021; 11:life11111180. [PMID: 34833056 PMCID: PMC8625531 DOI: 10.3390/life11111180] [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: 10/15/2021] [Revised: 10/30/2021] [Accepted: 11/01/2021] [Indexed: 11/16/2022] Open
Abstract
Acute chemical ablation of lateral line hair cells is an important tool to understand lateral line-mediated behaviors in free-swimming fish larvae and adults. However, lateral line-mediated behaviors have not been described in fish larvae prior to swim bladder inflation, possibly because single doses of ototoxin do not effectively silence lateral line function at early developmental stages. To determine whether ototoxins can disrupt lateral line hair cells during early development, we repeatedly exposed zebrafish larvae to the ototoxin neomycin during a 36 h period from 3 to 4 days post-fertilization (dpf). We use simultaneous transgenic and vital dye labeling of hair cells to compare 6-h and 12-h repeated treatment timelines and neomycin concentrations between 0 and 400 µM in terms of larval survival, hair cell death, regeneration, and functional recovery. Following exposure to neomycin, we find that the emergence of newly functional hair cells outpaces cellular regeneration, likely due to the maturation of ototoxin-resistant hair cells that survive treatment. Furthermore, hair cells of 4 dpf larvae exhibit faster recovery compared to 3 dpf larvae. Our data suggest that the rapid functional maturation of ototoxin-resistant hair cells limits the effectiveness of chemical-based methods to disrupt lateral line function. Furthermore, we show that repeated neomycin treatments can continually ablate functional lateral line hair cells between 3 and 4 dpf in larval zebrafish.
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7
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Reia L, Oliveira C, Benine RC. Moenkhausia andrica (Characiformes: Characidae): a new species from the rio Tapajós basin, Brazil, with minute fin hooklets in females. JOURNAL OF FISH BIOLOGY 2021; 99:1380-1392. [PMID: 34259347 DOI: 10.1111/jfb.14847] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 05/17/2021] [Accepted: 07/15/2021] [Indexed: 06/13/2023]
Abstract
In this study, a new species of Moenkhausia is described from the upper rio Juruena, rio Tapajós basin, Brazil. It is distinguished from all congeners by the presence of minute bony hooks in all fins of both mature females and males and combination of a prepelvic region flattened, dorsal portion of the humeral blotch extending two scales horizontally and vertically, lateral line with 28-32 scales, five scale series above and below lateral line; circumpeduncular scales 13-14, anal-fin rays 16-19 and dorsal portion of eyes blue in live specimens. The new species is also supported by high divergence in the mitochondrial gene cytochrome c oxidase subunit I (COI). The presence of minute fin bony hooks in both females and males, population variations and late development of the lateral line in Moenkhausia andrica are discussed.
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Affiliation(s)
- Lais Reia
- Laboratório de Ictiologia, Setor de Zoologia, Instituto de Biociências de Botucatu, Universidade Estadual Paulista, São Paulo, Brazil
| | - Claudio Oliveira
- Laboratório de Biologia e Genética de Peixes, Departamento de Biologia Estrutural e Funcional, Instituto de Biociências de Botucatu, Universidade Estadual Paulista, São Paulo, Brazil
| | - Ricardo C Benine
- Laboratório de Ictiologia, Setor de Zoologia, Instituto de Biociências de Botucatu, Universidade Estadual Paulista, São Paulo, Brazil
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8
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Seleit A, Gross K, Onistschenko J, Hoang OP, Theelke J, Centanin L. Local tissue interactions govern pLL patterning in medaka. Dev Biol 2021; 481:1-13. [PMID: 34517003 DOI: 10.1016/j.ydbio.2021.09.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 08/12/2021] [Accepted: 09/03/2021] [Indexed: 11/03/2022]
Abstract
Vertebrate organs are arranged in a stereotypic, species-specific position along the animal body plan. Substantial morphological variation exists between related species, especially so in the vastly diversified teleost clade. It is still unclear how tissues, organs and systems can accommodate such diverse scaffolds. Here, we use the distinctive arrangement of neuromasts in the posterior lateral line (pLL) system of medaka fish to address the tissue-interactions defining a pattern. We show that patterning in this peripheral nervous system is established by autonomous organ precursors independent of neuronal wiring. In addition, we target the keratin 15 gene to generate stuck-in-the-midline (siml) mutants, which display epithelial lesions and a disrupted pLL patterning. By using siml/wt chimeras, we determine that the aberrant siml pLL pattern depends on the mutant epithelium, since a wild type epithelium can rescue the siml phenotype. Inducing epithelial lesions by 2-photon laser ablation during pLL morphogenesis phenocopies siml genetic mutants and reveals that epithelial integrity defines the final position of the embryonic pLL neuromasts. Our results using the medaka pLL disentangle intrinsic from extrinsic properties during the establishment of a sensory system. We speculate that intrinsic programs guarantee proper organ morphogenesis, while instructive interactions from surrounding tissues facilitates the accommodation of sensory organs to the diverse body plans found among teleosts.
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Affiliation(s)
- Ali Seleit
- Laboratory of Clonal Analysis of Post-Embryonic Stem Cells, Centre for Organismal Studies (COS) Heidelberg, Im Neuenheimer Feld 230, Universität Heidelberg, 69120, Heidelberg, Germany; Heidelberg Biosciences International Graduate School (HBIGS), Universität Heidelberg, Heidelberg, Germany
| | - Karen Gross
- Laboratory of Clonal Analysis of Post-Embryonic Stem Cells, Centre for Organismal Studies (COS) Heidelberg, Im Neuenheimer Feld 230, Universität Heidelberg, 69120, Heidelberg, Germany; Heidelberg Biosciences International Graduate School (HBIGS), Universität Heidelberg, Heidelberg, Germany
| | - Jasmin Onistschenko
- Laboratory of Clonal Analysis of Post-Embryonic Stem Cells, Centre for Organismal Studies (COS) Heidelberg, Im Neuenheimer Feld 230, Universität Heidelberg, 69120, Heidelberg, Germany; Heidelberg Biosciences International Graduate School (HBIGS), Universität Heidelberg, Heidelberg, Germany
| | - Oi Pui Hoang
- Laboratory of Clonal Analysis of Post-Embryonic Stem Cells, Centre for Organismal Studies (COS) Heidelberg, Im Neuenheimer Feld 230, Universität Heidelberg, 69120, Heidelberg, Germany
| | - Jonas Theelke
- Laboratory of Clonal Analysis of Post-Embryonic Stem Cells, Centre for Organismal Studies (COS) Heidelberg, Im Neuenheimer Feld 230, Universität Heidelberg, 69120, Heidelberg, Germany
| | - Lázaro Centanin
- Laboratory of Clonal Analysis of Post-Embryonic Stem Cells, Centre for Organismal Studies (COS) Heidelberg, Im Neuenheimer Feld 230, Universität Heidelberg, 69120, Heidelberg, Germany.
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9
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Yamada K, Maeno A, Araki S, Kikuchi M, Suzuki M, Ishizaka M, Satoh K, Akama K, Kawabe Y, Suzuki K, Kobayashi D, Hamano N, Kawamura A. An atlas of seven zebrafish hox cluster mutants provides insights into sub/neofunctionalization of vertebrate Hox clusters. Development 2021; 148:269044. [PMID: 34096572 DOI: 10.1242/dev.198325] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 04/30/2021] [Indexed: 12/20/2022]
Abstract
Vertebrate Hox clusters are comprised of multiple Hox genes that control morphology and developmental timing along multiple body axes. Although results of genetic analyses using Hox-knockout mice have been accumulating, genetic studies in other vertebrates have not been sufficient for functional comparisons of vertebrate Hox genes. In this study, we isolated all of the seven hox cluster loss-of-function alleles in zebrafish using the CRISPR-Cas9 system. Comprehensive analysis of the embryonic phenotype and X-ray micro-computed tomography scan analysis of adult fish revealed several species-specific functional contributions of homologous Hox clusters along the appendicular axis, whereas important shared general principles were also confirmed, as exemplified by serial anterior vertebral transformations along the main body axis, observed in fish for the first time. Our results provide insights into discrete sub/neofunctionalization of vertebrate Hox clusters after quadruplication of the ancient Hox cluster. This set of seven complete hox cluster loss-of-function alleles provide a formidable resource for future developmental genetic analysis of the Hox patterning system in zebrafish.
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Affiliation(s)
- Kazuya Yamada
- Division of Life Science, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
| | - Akiteru Maeno
- Plant Resource Development, Division of Genetic Resource Center, National Institute of Genetics, Yata 1111, Mishima, Shizuoka 411-8540, Japan
| | - Soh Araki
- Division of Life Science, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
| | - Morimichi Kikuchi
- Division of Life Science, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
| | - Masato Suzuki
- Division of Life Science, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
| | - Mizuki Ishizaka
- Division of Life Science, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
| | - Koumi Satoh
- Division of Life Science, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
| | - Kagari Akama
- Division of Life Science, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
| | - Yuki Kawabe
- Division of Life Science, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
| | - Kenya Suzuki
- Division of Life Science, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
| | - Daiki Kobayashi
- Division of Life Science, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
| | - Nanami Hamano
- Division of Life Science, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
| | - Akinori Kawamura
- Division of Life Science, Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama 338-8570, Japan
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10
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Coombs S, Bak-Coleman J, Montgomery J. Rheotaxis revisited: a multi-behavioral and multisensory perspective on how fish orient to flow. J Exp Biol 2020; 223:223/23/jeb223008. [DOI: 10.1242/jeb.223008] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
ABSTRACT
Here, we review fish rheotaxis (orientation to flow) with the goal of placing it within a larger behavioral and multisensory context. Rheotaxis is a flexible behavior that is used by fish in a variety of circumstances: to search for upstream sources of current-borne odors, to intercept invertebrate drift and, in general, to conserve energy while preventing downstream displacement. Sensory information available for rheotaxis includes water-motion cues to the lateral line and body-motion cues to visual, vestibular or tactile senses when fish are swept downstream. Although rheotaxis can be mediated by a single sense, each sense has its own limitations. For example, lateral line cues are limited by the spatial characteristics of flow, visual cues by water visibility, and vestibular and other body-motion cues by the ability of fish to withstand downstream displacement. The ability of multiple senses to compensate for any single-sense limitation enables rheotaxis to persist over a wide range of sensory and flow conditions. Here, we propose a mechanism of rheotaxis that can be activated in parallel by one or more senses; a major component of this mechanism is directional selectivity of central neurons to broad patterns of water and/or body motions. A review of central mechanisms for vertebrate orienting behaviors and optomotor reflexes reveals several motorsensory integration sites in the CNS that could be involved in rheotaxis. As such, rheotaxis provides an excellent opportunity for understanding the multisensory control of a simple vertebrate behavior and how a simple motor act is integrated with others to form complex behaviors.
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Affiliation(s)
- Sheryl Coombs
- Bowling Green State University, Department of Biological Sciences and JP Scott Center for Neuroscience, Mind and Behavior, Bowling Green, OH 43403, USA
| | - Joe Bak-Coleman
- University of Washington, Center for an Informed Public and eScience Institute, Seattle, WA 98195, USA
| | - John Montgomery
- University of Auckland, School of Biological Sciences and Institute of Marine Science, Auckland 1142, New Zealand
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11
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Abstract
Deafness or hearing deficits are debilitating conditions. They are often caused by loss of sensory hair cells or defects in their function. In contrast to mammals, nonmammalian vertebrates robustly regenerate hair cells after injury. Studying the molecular and cellular basis of nonmammalian vertebrate hair cell regeneration provides valuable insights into developing cures for human deafness. In this review, we discuss the current literature on hair cell regeneration in the context of other models for sensory cell regeneration, such as the retina and the olfactory epithelium. This comparison reveals commonalities with, as well as differences between, the different regenerating systems, which begin to define a cellular and molecular blueprint of regeneration. In addition, we propose how new technical advances can address outstanding questions in the field.
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Affiliation(s)
- Nicolas Denans
- Stowers Institute for Medical Research, Kansas City, Missouri 64110, USA;
| | - Sungmin Baek
- Stowers Institute for Medical Research, Kansas City, Missouri 64110, USA;
| | - Tatjana Piotrowski
- Stowers Institute for Medical Research, Kansas City, Missouri 64110, USA;
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12
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PCP and Wnt pathway components act in parallel during zebrafish mechanosensory hair cell orientation. Nat Commun 2019; 10:3993. [PMID: 31488837 PMCID: PMC6728366 DOI: 10.1038/s41467-019-12005-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 08/05/2019] [Indexed: 12/03/2022] Open
Abstract
Planar cell polarity (PCP) plays crucial roles in developmental processes such as gastrulation, neural tube closure and hearing. Wnt pathway mutants are often classified as PCP mutants due to similarities between their phenotypes. Here, we show that in the zebrafish lateral line, disruptions of the PCP and Wnt pathways have differential effects on hair cell orientations. While mutations in the PCP genes vangl2 and scrib cause random orientations of hair cells, mutations in wnt11f1, gpc4 and fzd7a/b induce hair cells to adopt a concentric pattern. This concentric pattern is not caused by defects in PCP but is due to misaligned support cells. The molecular basis of the support cell defect is unknown but we demonstrate that the PCP and Wnt pathways work in parallel to establish proper hair cell orientation. Consequently, hair cell orientation defects are not solely explained by defects in PCP signaling, and some hair cell phenotypes warrant re-evaluation. Planar cell polarity (PCP) regulates hair cell orientation in the zebrafish lateral line. Here, the authors show that mutating Wnt pathway genes (wnt11f1, fzd7a/b, and gpc4) causes concentric hair cell patterns not regulated by PCP, thus showing PCP/Wnt pathway genes have different consequences on hair cell orientation.
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13
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Thomas ED, Raible DW. Distinct progenitor populations mediate regeneration in the zebrafish lateral line. eLife 2019; 8:43736. [PMID: 30834891 PMCID: PMC6433462 DOI: 10.7554/elife.43736] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 02/28/2019] [Indexed: 01/06/2023] Open
Abstract
Mechanosensory hair cells of the zebrafish lateral line regenerate rapidly following damage. These renewed hair cells arise from the proliferation of surrounding support cells, which undergo symmetric division to produce two hair cell daughters. Given the continued regenerative capacity of the lateral line, support cells presumably have the ability to replenish themselves. Utilizing novel transgenic lines, we identified support cell populations with distinct progenitor identities. These populations show differences in their ability to generate new hair cells during homeostasis and regeneration. Targeted ablation of support cells reduced the number of regenerated hair cells. Furthermore, progenitors regenerated after targeted support cell ablation in the absence of hair cell damage. We also determined that distinct support cell populations are independently regulated by Notch signaling. The existence of independent progenitor populations could provide flexibility for the continued generation of new hair cells under a variety of conditions throughout the life of the animal.
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Affiliation(s)
- Eric D Thomas
- Department of Biological Structure, University of Washington, Seattle, United States.,Graduate Program in Neuroscience, University of Washington, Seattle, United States
| | - David W Raible
- Department of Biological Structure, University of Washington, Seattle, United States.,Graduate Program in Neuroscience, University of Washington, Seattle, United States.,Virginia Merrill Bloedel Hearing Research Center, University of Washington, Seattle, United States
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14
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Lush ME, Diaz DC, Koenecke N, Baek S, Boldt H, St Peter MK, Gaitan-Escudero T, Romero-Carvajal A, Busch-Nentwich EM, Perera AG, Hall KE, Peak A, Haug JS, Piotrowski T. scRNA-Seq reveals distinct stem cell populations that drive hair cell regeneration after loss of Fgf and Notch signaling. eLife 2019; 8:e44431. [PMID: 30681411 PMCID: PMC6363392 DOI: 10.7554/elife.44431] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 01/24/2019] [Indexed: 12/25/2022] Open
Abstract
Loss of sensory hair cells leads to deafness and balance deficiencies. In contrast to mammalian hair cells, zebrafish ear and lateral line hair cells regenerate from poorly characterized support cells. Equally ill-defined is the gene regulatory network underlying the progression of support cells to differentiated hair cells. scRNA-Seq of lateral line organs uncovered five different support cell types, including quiescent and activated stem cells. Ordering of support cells along a developmental trajectory identified self-renewing cells and genes required for hair cell differentiation. scRNA-Seq analyses of fgf3 mutants, in which hair cell regeneration is increased, demonstrates that Fgf and Notch signaling inhibit proliferation of support cells in parallel by inhibiting Wnt signaling. Our scRNA-Seq analyses set the foundation for mechanistic studies of sensory organ regeneration and is crucial for identifying factors to trigger hair cell production in mammals. The data is searchable and publicly accessible via a web-based interface.
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Affiliation(s)
- Mark E Lush
- Stowers Institute for Medical ResearchKansas CityUnited States
| | - Daniel C Diaz
- Stowers Institute for Medical ResearchKansas CityUnited States
| | - Nina Koenecke
- Stowers Institute for Medical ResearchKansas CityUnited States
| | - Sungmin Baek
- Stowers Institute for Medical ResearchKansas CityUnited States
| | - Helena Boldt
- Stowers Institute for Medical ResearchKansas CityUnited States
| | | | | | - Andres Romero-Carvajal
- Stowers Institute for Medical ResearchKansas CityUnited States
- Pontificia Universidad Catolica del EcuadorCiencias BiologicasQuitoEcuador
| | - Elisabeth M Busch-Nentwich
- Wellcome Sanger Institute, Wellcome Genome CampusHinxtonUnited Kingdom
- Department of MedicineUniversity of CambridgeCambridgeUnited Kingdom
| | - Anoja G Perera
- Stowers Institute for Medical ResearchKansas CityUnited States
| | - Kathryn E Hall
- Stowers Institute for Medical ResearchKansas CityUnited States
| | - Allison Peak
- Stowers Institute for Medical ResearchKansas CityUnited States
| | - Jeffrey S Haug
- Stowers Institute for Medical ResearchKansas CityUnited States
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15
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Drake PM, Franz-Odendaal TA. A Potential Role for MMPs during the Formation of Non-Neurogenic Placodes. J Dev Biol 2018; 6:jdb6030020. [PMID: 30049947 PMCID: PMC6162748 DOI: 10.3390/jdb6030020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 07/16/2018] [Accepted: 07/24/2018] [Indexed: 12/16/2022] Open
Abstract
The formation of non-neurogenic placodes is critical prior to the development of several epithelial derivatives (e.g., feathers, teeth, etc.) and their development frequently involves morphogenetic proteins (or morphogens). Matrix metalloproteinases (MMPs) are important enzymes involved in extracellular matrix remodeling, and recent research has shown that the extracellular matrix (ECM) can modulate morphogen diffusion and cell behaviors. This review summarizes the known roles of MMPs during the development of non-neurogenic structures that involve a placodal stage. Specifically, we discuss feather, hair, tooth, mammary gland and lens development. This review highlights the potential critical role MMPs may play during placode formation in these systems.
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Affiliation(s)
- Paige M Drake
- Department of Medical Neuroscience, Dalhousie University, 5850 College Street, Halifax, NS B3H 4R2, Canada.
- Department of Biology, Mount Saint Vincent University, 166 Bedford Highway, Halifax, NS B3M 2J6, Canada.
| | - Tamara A Franz-Odendaal
- Department of Medical Neuroscience, Dalhousie University, 5850 College Street, Halifax, NS B3H 4R2, Canada.
- Department of Biology, Mount Saint Vincent University, 166 Bedford Highway, Halifax, NS B3M 2J6, Canada.
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16
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Hair cell identity establishes labeled lines of directional mechanosensation. PLoS Biol 2018; 16:e2004404. [PMID: 30024872 PMCID: PMC6067750 DOI: 10.1371/journal.pbio.2004404] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 07/31/2018] [Accepted: 07/02/2018] [Indexed: 11/19/2022] Open
Abstract
Directional mechanoreception by hair cells is transmitted to the brain via afferent neurons to enable postural control and rheotaxis. Neuronal tuning to individual directions of mechanical flow occurs when each peripheral axon selectively synapses with multiple hair cells of identical planar polarization. How such mechanosensory labeled lines are established and maintained remains unsolved. Here, we use the zebrafish lateral line to reveal that asymmetric activity of the transcription factor Emx2 diversifies hair cell identity to instruct polarity-selective synaptogenesis. Unexpectedly, presynaptic scaffolds and coherent hair cell orientation are dispensable for synaptic selectivity, indicating that epithelial planar polarity and synaptic partner matching are separable. Moreover, regenerating axons recapitulate synapses with hair cells according to Emx2 expression but not global orientation. Our results identify a simple cellular algorithm that solves the selectivity task even in the presence of noise generated by the frequent receptor cell turnover. They also suggest that coupling connectivity patterns to cellular identity rather than polarity relaxes developmental and evolutionary constraints to innervation of organs with differing orientation. Mechanosensory systems are essential for maintaining posture, gaze, and body orientation during locomotion. Such stability requires a coherent representation in the brain of the location and movement of mechanical stimuli. In fishes, mechanical stimuli at a given position activate direction-sensitive receptors called hair cells that are oriented with polarized directionality. These hair cells stimulate neurons that selectively connect with them based on polarity. We have addressed how neurons target hair cells based on polarity during development of the mechanosensory lateral line system in zebrafish. We show that neurons selectively connect based on the expression pattern of the transcription factor Emx2 in hair cells. We find that the lateral line can maintain directionality after damage and regeneration. Our data suggest a cellular mechanism that controls the formation, maintenance, and regeneration of labeled lines to enable directional mechanosensation.
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17
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Chen Z, Chou SW, McDermott BM. Ribeye protein is intrinsically dynamic but is stabilized in the context of the ribbon synapse. J Physiol 2018; 596:409-421. [PMID: 29086422 DOI: 10.1113/jp271215] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 10/26/2017] [Indexed: 01/16/2023] Open
Abstract
KEY POINTS The synaptic ribbon is an organelle that coordinates rapid and sustained vesicle release to enable hearing and balance. Ribeye a and b proteins are major constituents of the synaptic ribbon in hair cells. In this study, we use optically clear transgenic zebrafish to examine the potential dynamics of ribeye proteins in vivo. We demonstrate that ribeye proteins are inherently dynamic but are stabilized at the ribbons of hair cells in the ear and the lateral line system. ABSTRACT Ribeye protein is a major constituent of the synaptic ribbon, an organelle that coordinates rapid and sustained vesicle release to enable hearing and balance. The ribbon is considered to be a stable structure. However, under certain physiological conditions such as acoustic overexposure that results in temporary noise-induced hearing loss or perturbations of ion channels, ribbons may change shape or vanish altogether, suggesting greater plasticity than previously appreciated. The dynamic properties of ribeye proteins are unknown. Here we use transgenesis and imaging to explore the behaviours of ribeye proteins within the ribbon and also their intrinsic properties outside the context of the ribbon synapse in a control cell type, the skin cell. By fluorescence recovery after photobleaching (FRAP) on transgenic zebrafish larvae, we test whether ribeye proteins are dynamic in vivo in real time. In the skin, a cell type devoid of synaptic contacts, Ribeye a-mCherry exchanges with ribbon-like structures on a time scale of minutes (t1/2 = 3.2 min). In contrast, Ribeye a of the ear and lateral line and Ribeye b of the lateral line each exchange at ribbons of hair cells an order of magnitude slower (t1/2 of 125.6 min, 107.0 min and 95.3 min, respectively) than Ribeye a of the skin. These basal exchange rates suggest that long-term ribbon presence may require ribeye renewal. Our studies demonstrate that ribeye proteins are inherently dynamic but are stabilized at the ribbons of sensory cells in vivo.
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Affiliation(s)
- Zongwei Chen
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University, Cleveland, OH, 44106, USA.,Department of Biology, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Shih-Wei Chou
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University, Cleveland, OH, 44106, USA.,Department of Biology, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Brian M McDermott
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University, Cleveland, OH, 44106, USA.,Department of Biology, Case Western Reserve University, Cleveland, OH, 44106, USA.,Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, 44106, USA.,Department of Neurosciences, Case Western Reserve University, Cleveland, OH, 44106, USA
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18
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O'Reilly-Pol T, Kniepkamp K, Johnson SL. Three-Dimensional Printed Fish Graders: A Tool to Rapidly and Reliably Size Select Zebrafish. Zebrafish 2017; 14:280-283. [PMID: 28287927 PMCID: PMC5466055 DOI: 10.1089/zeb.2016.1414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Research into adult zebrafish often requires fish to be of a specific size. Currently, fish must be individually measured to achieve this goal. Here, we design and utilize fish graders to quickly sort fish by width. We characterize graders individually for the length of fish they discriminate between and we also analyze graders in pairs to define the range of lengths for a retained population of fish. We note that a 1 mm increase of fish width increases fish length by 6.2-7.2 mm. We provide the schematics to print a series of eight retention widths, and note that graders of any desired retention width can easily be printed by slightly modifying our design files.
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Affiliation(s)
- Thomas O'Reilly-Pol
- Department of Genetics, Washington University in St. Louis , St. Louis, Missouri
| | - Kyle Kniepkamp
- Department of Genetics, Washington University in St. Louis , St. Louis, Missouri
| | - Stephen L Johnson
- Department of Genetics, Washington University in St. Louis , St. Louis, Missouri
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19
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Seleit A, Krämer I, Ambrosio E, Dross N, Engel U, Centanin L. Sequential organogenesis sets two parallel sensory lines in medaka. Development 2017; 144:687-697. [PMID: 28087632 PMCID: PMC5312036 DOI: 10.1242/dev.142752] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 12/29/2016] [Indexed: 01/10/2023]
Abstract
Animal organs are typically formed during embryogenesis by following one specific developmental programme. Here, we report that neuromast organs are generated by two distinct and sequential programmes that result in parallel sensory lines in medaka embryos. A ventral posterior lateral line (pLL) is composed of neuromasts deposited by collectively migrating cells whereas a midline pLL is formed by individually migrating cells. Despite the variable number of neuromasts among embryos, the sequential programmes that we describe here fix an invariable ratio between ventral and midline neuromasts. Mechanistically, we show that the formation of both types of neuromasts depends on the chemokine receptor genes cxcr4b and cxcr7b, illustrating how common molecules can mediate different morphogenetic processes. Altogether, we reveal a self-organising feature of the lateral line system that ensures a proper distribution of sensory organs along the body axis. Summary: Two parallel sensory lines in medaka share a common origin and are composed of identical organs that are, nevertheless, generated through different morphogenetic programmes.
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Affiliation(s)
- Ali Seleit
- Animal Physiology and Development, Centre for Organismal Studies (COS) Heidelberg, Im Neuenheimer Feld 230, Heidelberg 69120, Germany.,The Hartmut Hoffmann-Berling International Graduate School of Molecular and Cellular Biology (HBIGS), University of Heidelberg, Heidelberg, Germany
| | - Isabel Krämer
- Animal Physiology and Development, Centre for Organismal Studies (COS) Heidelberg, Im Neuenheimer Feld 230, Heidelberg 69120, Germany.,The Hartmut Hoffmann-Berling International Graduate School of Molecular and Cellular Biology (HBIGS), University of Heidelberg, Heidelberg, Germany
| | - Elizabeth Ambrosio
- Animal Physiology and Development, Centre for Organismal Studies (COS) Heidelberg, Im Neuenheimer Feld 230, Heidelberg 69120, Germany
| | - Nicolas Dross
- Animal Physiology and Development, Centre for Organismal Studies (COS) Heidelberg, Im Neuenheimer Feld 230, Heidelberg 69120, Germany.,Nikon Imaging Center at the University of Heidelberg, Heidelberg, Germany
| | - Ulrike Engel
- Animal Physiology and Development, Centre for Organismal Studies (COS) Heidelberg, Im Neuenheimer Feld 230, Heidelberg 69120, Germany.,Nikon Imaging Center at the University of Heidelberg, Heidelberg, Germany
| | - Lázaro Centanin
- Animal Physiology and Development, Centre for Organismal Studies (COS) Heidelberg, Im Neuenheimer Feld 230, Heidelberg 69120, Germany
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20
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Korbut R, Mehrdana F, Kania PW, Larsen MH, Frees D, Dalsgaard I, Jørgensen LVG. Antigen Uptake during Different Life Stages of Zebrafish (Danio rerio) Using a GFP-Tagged Yersinia ruckeri. PLoS One 2016; 11:e0158968. [PMID: 27404564 PMCID: PMC4942034 DOI: 10.1371/journal.pone.0158968] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 06/26/2016] [Indexed: 12/04/2022] Open
Abstract
Immersion-vaccines (bacterins) are routinely used for aquacultured rainbow trout to protect against Yersinia ruckeri (Yr). During immersion vaccination, rainbow trout take up and process the antigens, which induce protection. The zebrafish was used as a model organism to study uptake mechanisms and subsequent antigen transport in fish. A genetically modified Yr was developed to constitutively express green fluorescent protein (GFP) and was used for bacterin production. Larval, juvenile and adult transparent zebrafish (tra:nac mutant) received a bath in the bacterin for up to 30 minutes. Samples were taken after 1 min, 15 min, 30 min, 2 h, 12 h and 24 h. At each sampling point fish were used for live imaging of the uptake using a fluorescence stereomicroscope and for immunohistochemistry (IHC). In adult fish, the bacterin could be traced within 30 min in scale pockets, skin, oesophagus, intestine and fins. Within two hours post bath (pb) Yr-antigens were visible in the spleen and at 24 h in liver and kidney. Bacteria were associated with the gills, but uptake at this location was limited. Antigens were rarely detected in the blood and never in the nares. In juvenile fish uptake of the bacterin was seen in the intestine 30 min pb and in the nares 2 hpb but never in scale pockets. Antigens were detected in the spleen 12 hpb. Zebrafish larvae exhibited major Yr uptake only in the mid-intestine enterocytes 24 hpb. The different life stages of zebrafish varied with regard to uptake locations, however the gut was consistently a major uptake site. Zebrafish and rainbow trout tend to have similar uptake mechanisms following immersion or bath vaccination, which points towards zebrafish as a suitable model organism for this aquacultured species.
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Affiliation(s)
- Rozalia Korbut
- Laboratory of Aquatic Pathobiology, Department of Veterinary Disease Biology, University of Copenhagen, Frederiksberg, Denmark
| | - Foojan Mehrdana
- Laboratory of Aquatic Pathobiology, Department of Veterinary Disease Biology, University of Copenhagen, Frederiksberg, Denmark
| | - Per Walter Kania
- Laboratory of Aquatic Pathobiology, Department of Veterinary Disease Biology, University of Copenhagen, Frederiksberg, Denmark
| | - Marianne Halberg Larsen
- Food Safety and Zoonoses, Department of Veterinary Disease Biology, University of Copenhagen, Frederiksberg, Denmark
| | - Dorte Frees
- Food Safety and Zoonoses, Department of Veterinary Disease Biology, University of Copenhagen, Frederiksberg, Denmark
| | - Inger Dalsgaard
- Section for Bacteriology and Pathology, National Veterinary Institute, Technical University of Denmark, Frederiksberg, Denmark
| | - Louise von Gersdorff Jørgensen
- Laboratory of Aquatic Pathobiology, Department of Veterinary Disease Biology, University of Copenhagen, Frederiksberg, Denmark
- * E-mail:
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21
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Tang D, Lin Q, He Y, Chai R, Li H. Inhibition of H3K9me2 Reduces Hair Cell Regeneration after Hair Cell Loss in the Zebrafish Lateral Line by Down-Regulating the Wnt and Fgf Signaling Pathways. Front Mol Neurosci 2016; 9:39. [PMID: 27303264 PMCID: PMC4880589 DOI: 10.3389/fnmol.2016.00039] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 05/12/2016] [Indexed: 11/13/2022] Open
Abstract
The activation of neuromast (NM) supporting cell (SC) proliferation leads to hair cell (HC) regeneration in the zebrafish lateral line. Epigenetic mechanisms have been reported that regulate HC regeneration in the zebrafish lateral line, but the role of H3K9me2 in HC regeneration after HC loss remains poorly understood. In this study, we focused on the role of H3K9me2 in HC regeneration following neomycin-induced HC loss. To investigate the effects of H3K9me2 in HC regeneration, we took advantage of the G9a/GLP-specific inhibitor BIX01294 that significantly reduces the dimethylation of H3K9. We found that BIX01294 significantly reduced HC regeneration after neomycin-induced HC loss in the zebrafish lateral line. BIX01294 also significantly reduced the proliferation of NM cells and led to fewer SCs in the lateral line. In situ hybridization showed that BIX01294 significantly down-regulated the Wnt and Fgf signaling pathways, which resulted in reduced SC proliferation and HC regeneration in the NMs of the lateral line. Altogether, our results suggest that down-regulation of H3K9me2 significantly decreases HC regeneration after neomycin-induced HC loss through inactivation of the Wnt/β-catenin and Fgf signaling pathways. Thus H3K9me2 plays a critical role in HC regeneration.
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Affiliation(s)
- Dongmei Tang
- Department of Otorhinolaryngology, Affiliated Eye and ENT Hospital of Fudan University Shanghai, China
| | - Qin Lin
- Department of Otolaryngology Head and Neck Surgery, First Affiliated Hospital of Fujian Medical University Fuzhou, China
| | - Yingzi He
- Department of Otorhinolaryngology, Affiliated Eye and ENT Hospital of Fudan University Shanghai, China
| | - Renjie Chai
- Key Laboratory for Developmental Genes and Human Disease, Ministry of Education, Institute of Life Sciences, Southeast UniversityNanjing, China; Co-innovation Center of Neuroregeneration, Nantong UniversityNantong, China
| | - Huawei Li
- Department of Otorhinolaryngology, Affiliated Eye and ENT Hospital of Fudan UniversityShanghai, China; State Key Laboratory of Medical Neurobiology, Fudan UniversityShanghai, China; Institute of Stem Cell and Regeneration Medicine, Institutions of Biomedical Science, Fudan UniversityShanghai, China; Key Laboratory of Hearing Science, Ministry of Health, EENT Hospital, Fudan UniversityShanghai, China
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22
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Leventea E, Hazime K, Zhao C, Malicki J. Analysis of cilia structure and function in zebrafish. Methods Cell Biol 2016; 133:179-227. [PMID: 27263414 DOI: 10.1016/bs.mcb.2016.04.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Cilia are microtubule-based protrusions on the surface of most eukaryotic cells. They are found in most, if not all, vertebrate organs. Prominent cilia form in sensory structures, the eye, the ear, and the nose, where they are crucial for the detection of environmental stimuli, such as light and odors. Cilia are also involved in developmental processes, including left-right asymmetry formation, limb morphogenesis, and the patterning of neurons in the neural tube. Some cilia, such as those found in nephric ducts, are thought to have mechanosensory roles. Zebrafish proved very useful in genetic analysis and imaging of cilia-related processes, and in the modeling of mechanisms behind human cilia abnormalities, known as ciliopathies. A number of zebrafish defects resemble those seen in human ciliopathies. Forward and reverse genetic strategies generated a wide range of cilia mutants in zebrafish, which can be studied using sophisticated genetic and imaging approaches. In this chapter, we provide a set of protocols to examine cilia morphology, motility, and cilia-related defects in a variety of organs, focusing on the embryo and early postembryonic development.
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Affiliation(s)
- E Leventea
- The University of Sheffield, Sheffield, United Kingdom
| | - K Hazime
- The University of Sheffield, Sheffield, United Kingdom
| | - C Zhao
- The University of Sheffield, Sheffield, United Kingdom; Ocean University of China, Qingdao, China
| | - J Malicki
- The University of Sheffield, Sheffield, United Kingdom
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23
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Sánchez M, Ceci ML, Gutiérrez D, Anguita-Salinas C, Allende ML. Mechanosensory organ regeneration in zebrafish depends on a population of multipotent progenitor cells kept latent by Schwann cells. BMC Biol 2016; 14:27. [PMID: 27055439 PMCID: PMC4823859 DOI: 10.1186/s12915-016-0249-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 03/22/2016] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Regenerating damaged tissue is a complex process, requiring progenitor cells that must be stimulated to undergo proliferation, differentiation and, often, migratory behaviors and morphological changes. Multiple cell types, both resident within the damaged tissue and recruited to the lesion site, have been shown to participate. However, the cellular and molecular mechanisms involved in the activation of progenitor cell proliferation and differentiation after injury, and their regulation by different cells types, are not fully understood. The zebrafish lateral line is a suitable system to study regeneration because most of its components are fully restored after damage. The posterior lateral line (PLL) is a mechanosensory system that develops embryonically and is initially composed of seven to eight neuromasts distributed along the trunk and tail, connected by a continuous stripe of interneuromastic cells (INCs). The INCs remain in a quiescent state owing to the presence of underlying Schwann cells. They become activated during development to form intercalary neuromasts. However, no studies have described if INCs can participate in a regenerative event, for example, after the total loss of a neuromast. RESULTS We used electroablation in transgenic larvae expressing fluorescent proteins in PLL components to completely ablate single neuromasts in larvae and adult fish. This injury results in discontinuity of the INCs, Schwann cells, and the PLL nerve. In vivo imaging showed that the INCs fill the gap left after the injury and can regenerate a new neuromast in the injury zone. Further, a single INC is able to divide and form all cell types in a regenerated neuromast and, during this process, it transiently expresses the sox2 gene, a neural progenitor cell marker. We demonstrate a critical role for Schwann cells as negative regulators of INC proliferation and neuromast regeneration, and that this inhibitory property is completely dependent on active ErbB signaling. CONCLUSIONS The potential to regenerate a neuromast after damage requires that progenitor cells (INCs) be temporarily released from an inhibitory signal produced by nearby Schwann cells. This simple yet highly effective two-component niche offers the animal robust mechanisms for organ growth and regeneration, which can be sustained throughout life.
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Affiliation(s)
- Mario Sánchez
- FONDAP Center for Genome Regulation, Facultad de Ciencias, Universidad de Chile, Casilla 653, Las Palmeras 3425, Santiago, Chile
| | - Maria Laura Ceci
- FONDAP Center for Genome Regulation, Facultad de Ciencias, Universidad de Chile, Casilla 653, Las Palmeras 3425, Santiago, Chile
| | - Daniela Gutiérrez
- FONDAP Center for Genome Regulation, Facultad de Ciencias, Universidad de Chile, Casilla 653, Las Palmeras 3425, Santiago, Chile
| | - Consuelo Anguita-Salinas
- FONDAP Center for Genome Regulation, Facultad de Ciencias, Universidad de Chile, Casilla 653, Las Palmeras 3425, Santiago, Chile
| | - Miguel L Allende
- FONDAP Center for Genome Regulation, Facultad de Ciencias, Universidad de Chile, Casilla 653, Las Palmeras 3425, Santiago, Chile.
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24
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He Y, Wang Z, Sun S, Tang D, Li W, Chai R, Li H. HDAC3 Is Required for Posterior Lateral Line Development in Zebrafish. Mol Neurobiol 2015; 53:5103-17. [PMID: 26395281 DOI: 10.1007/s12035-015-9433-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 09/10/2015] [Indexed: 01/03/2023]
Abstract
Histone deacetylases (HDACs) are involved in multiple developmental processes, but their functions in the development of mechanosensory organs are largely unknown. In the present study, we report the presence of HDAC3 in the zebrafish posterior lateral line primordium and newly deposited neuromasts. We used morpholinos to show that HDAC3 knockdown severely disrupts the development of the posterior lateral line and reduces the numbers of neuromasts and sensory hair cells within these organs. In HDAC3 morphants, we also observed decreased cell proliferation and increased apoptosis, which might lead to these defects. Finally, we show that HDAC3 deficiency results in attenuated Fgf signaling in the migrating primordium. In situ hybridizations indicate aberrant expression patterns of Notch signaling pathway genes in HDAC3 morphants. In addition, inhibition of HDAC3 function diminishes cxcr7b and alters cxcl12a expression in the migrating primordium. Our results indicate that HDAC3 plays a crucial role in regulating posterior lateral line (PLL) formation and provide evidence for epigenetic regulation in auditory organ development.
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Affiliation(s)
- Yingzi He
- Otorhinolaryngology Department of Affiliated Eye and ENT Hospital, Fudan University, 83 Fenyang Road, Shanghai, 200031, People's Republic of China
| | - Zhengmin Wang
- Otorhinolaryngology Department of Affiliated Eye and ENT Hospital, Fudan University, 83 Fenyang Road, Shanghai, 200031, People's Republic of China. .,Key Laboratory of Hearing Medicine of National Health and Family Planning Commission, Shanghai, People's Republic of China.
| | - Shaoyang Sun
- Key Laboratory of Metabolism and Molecular Medicine, the Ministry of Education, Department of Biochemistry and Molecular Biology, Fudan University Shanghai Medical College, Shanghai, People's Republic of China
| | - Dongmei Tang
- Otorhinolaryngology Department of Affiliated Eye and ENT Hospital, Fudan University, 83 Fenyang Road, Shanghai, 200031, People's Republic of China
| | - Wenyan Li
- Otorhinolaryngology Department of Affiliated Eye and ENT Hospital, Fudan University, 83 Fenyang Road, Shanghai, 200031, People's Republic of China
| | - Renjie Chai
- Co-innovation Center of Neuroregeneration, Key Laboratory for Developmental Genes and Human Disease, Institute of Life Sciences, Southeast University, Nanjing, Jiangsu, 210096, People's Republic of China
| | - Huawei Li
- Otorhinolaryngology Department of Affiliated Eye and ENT Hospital, Fudan University, 83 Fenyang Road, Shanghai, 200031, People's Republic of China. .,Key Laboratory of Hearing Medicine of National Health and Family Planning Commission, Shanghai, People's Republic of China. .,State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, 200031, People's Republic of China. .,Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, People's Republic of China.
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26
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Lehoux C, Cloutier R. Building blocks of a fish head: Developmental and variational modularity in a complex system. JOURNAL OF EXPERIMENTAL ZOOLOGY PART B-MOLECULAR AND DEVELOPMENTAL EVOLUTION 2015; 324:614-28. [DOI: 10.1002/jez.b.22639] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 07/01/2015] [Indexed: 01/21/2023]
Affiliation(s)
- Caroline Lehoux
- Laboratoire de biologie évolutive; Université du Québec à Rimouski; Rimouski Québec Canada
| | - Richard Cloutier
- Laboratoire de biologie évolutive; Université du Québec à Rimouski; Rimouski Québec Canada
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27
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He Y, Tang D, Cai C, Chai R, Li H. LSD1 is Required for Hair Cell Regeneration in Zebrafish. Mol Neurobiol 2015; 53:2421-34. [PMID: 26008620 DOI: 10.1007/s12035-015-9206-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 05/01/2015] [Indexed: 02/06/2023]
Abstract
Lysine-specific demethylase 1 (LSD1/KDM1A) plays an important role in complex cellular processes such as differentiation, proliferation, apoptosis, and cell cycle progression. It has recently been demonstrated that during development, downregulation of LSD1 inhibits cell proliferation, modulates the expression of cell cycle regulators, and reduces hair cell formation in the zebrafish lateral line, which suggests that LSD1-mediated epigenetic regulation plays a key role in the development of hair cells. However, the role of LSD1 in hair cell regeneration after hair cell loss remains poorly understood. Here, we demonstrate the effect of LSD1 on hair cell regeneration following neomycin-induced hair cell loss. We show that the LSD1 inhibitor trans-2-phenylcyclopropylamine (2-PCPA) significantly decreases the regeneration of hair cells in zebrafish after neomycin damage. In addition, immunofluorescent staining demonstrates that 2-PCPA administration suppresses supporting cell proliferation and alters cell cycle progression. Finally, in situ hybridization shows that 2-PCPA significantly downregulates the expression of genes related to Wnt/β-catenin and Fgf activation. Altogether, our data suggest that downregulation of LSD1 significantly decreases hair cell regeneration after neomycin-induced hair cell loss through inactivation of the Wnt/β-catenin and Fgf signaling pathways. Thus, LSD1 plays a critical role in hair cell regeneration and might represent a novel biomarker and potential therapeutic approach for the treatment of hearing loss.
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Affiliation(s)
- Yingzi He
- Department of Otorhinolaryngology, Affiliated Eye and ENT Hospital, Fudan University, Shanghai, 200031, People's Republic of China
| | - Dongmei Tang
- Department of Otorhinolaryngology, Affiliated Eye and ENT Hospital, Fudan University, Shanghai, 200031, People's Republic of China
| | - Chengfu Cai
- Department of Otolaryngology Head and Neck Surgery, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian, People's Republic of China
| | - Renjie Chai
- Co-innovation Center of Neuroregeneration, Key Laboratory for Developmental Genes and Human Disease, Institute of Life Sciences, Southeast University, Nanjing, Jiangsu, 210096, People's Republic of China
| | - Huawei Li
- Department of Otorhinolaryngology, Affiliated Eye and ENT Hospital, Fudan University, Shanghai, 200031, People's Republic of China. .,State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, People's Republic of China. .,Institute of Stem Cell and Regeneration Medicine, Institute of Biomedical Science, Fudan University, Shanghai, People's Republic of China. .,Key Laboratory of Hearing Science, Ministry of Health, EENT Hospital, Fudan University, Shanghai, People's Republic of China.
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28
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Size control during organogenesis: Development of the lateral line organs in zebrafish. Dev Growth Differ 2015; 57:169-78. [DOI: 10.1111/dgd.12196] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 12/18/2014] [Accepted: 12/18/2014] [Indexed: 12/30/2022]
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Wada H, Iwasaki M, Kawakami K. Development of the lateral line canal system through a bone remodeling process in zebrafish. Dev Biol 2014; 392:1-14. [PMID: 24836859 DOI: 10.1016/j.ydbio.2014.05.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 04/25/2014] [Accepted: 05/06/2014] [Indexed: 11/16/2022]
Abstract
The lateral line system of teleost fish is composed of mechanosensory receptors (neuromasts), comprising superficial receptors and others embedded in canals running under the skin. Canal diameter and size of the canal neuromasts are correlated with increasing body size, thus providing a very simple system to investigate mechanisms underlying the coordination between organ growth and body size. Here, we examine the development of the trunk lateral line canal system in zebrafish. We demonstrated that trunk canals originate from scales through a bone remodeling process, which we suggest is essential for the normal growth of canals and canal neuromasts. Moreover, we found that lateral line cells are required for the formation of canals, suggesting the existence of mutual interactions between the sensory system and surrounding connective tissues.
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Affiliation(s)
- Hironori Wada
- Division of Molecular and Developmental Biology, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan.
| | - Miki Iwasaki
- Division of Molecular and Developmental Biology, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
| | - Koichi Kawakami
- Division of Molecular and Developmental Biology, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan; Department of Genetics, Graduate University for Advanced Studies (SOKENDAI), 1111 Yata, Mishima, Shizuoka 411-8540, Japan
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30
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Lush ME, Piotrowski T. ErbB expressing Schwann cells control lateral line progenitor cells via non-cell-autonomous regulation of Wnt/β-catenin. eLife 2014; 3:e01832. [PMID: 24642408 PMCID: PMC3957165 DOI: 10.7554/elife.01832] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Proper orchestration of quiescence and activation of progenitor cells is crucial during embryonic development and adult homeostasis. We took advantage of the zebrafish sensory lateral line to define niche-progenitor interactions to understand how integration of diverse signaling pathways spatially and temporally regulates the coordination of these processes. Our previous studies demonstrated that Schwann cells play a crucial role in negatively regulating lateral line progenitor proliferation. Here we demonstrate that ErbB/Neuregulin signaling is not only required for Schwann cell migration but that it plays a continued role in postmigratory Schwann cells. ErbB expressing Schwann cells inhibit lateral line progenitor proliferation and differentiation through non-cell-autonomous inhibition of Wnt/β-catenin signaling. Subsequent activation of Fgf signaling controls sensory organ differentiation, but not progenitor proliferation. In addition to the lateral line, these findings have important implications for understanding how niche-progenitor cells segregate interactions during development, and how they may go wrong in disease states. DOI: http://dx.doi.org/10.7554/eLife.01832.001.
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Affiliation(s)
- Mark E Lush
- Stowers Institute for Medical Research, Kansas City, United States
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31
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Dynamics of axonal regeneration in adult and aging zebrafish reveal the promoting effect of a first lesion. Proc Natl Acad Sci U S A 2014; 111:1610-5. [PMID: 24474787 DOI: 10.1073/pnas.1319405111] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Axonal regeneration is a major issue in the maintenance of adult nervous systems, both after nerve injuries and in neurodegenerative diseases. However, studying this process in vivo is difficult or even impossible in most vertebrates. Here we show that the posterior lateral line (PLL) of zebrafish is a suitable system to study axonal regeneration in vivo because of both the superficial location and reproducible spatial arrangement of neurons and targets, and the possibility of following reinnervation in live fish on a daily basis. Axonal regeneration after nerve cut has been demonstrated in this system during the first few days of life, leading to complete regeneration within 24 h. However, the potential for PLL nerve regeneration has not been tested yet beyond the early larval stage. We explore the regeneration potential and dynamics of the PLL nerve in adult zebrafish and report that regeneration occurs throughout adulthood. We observed that irregularities in the original branching pattern are faithfully reproduced after regeneration, suggesting that regenerating axons follow the path laid down by the original nerve branches. We quantified the extent of target reinnervation after a nerve cut and found that the latency before the nerve regenerates increases with age. This latency is reduced after a second nerve cut at all ages, suggesting that a regeneration-promoting factor induced by the first cut facilitates regeneration on a second cut. We provide evidence that this factor remains present at the site of the first lesion for several days and is intrinsic to the neurons.
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32
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Head JR, Gacioch L, Pennisi M, Meyers JR. Activation of canonical Wnt/β-catenin signaling stimulates proliferation in neuromasts in the zebrafish posterior lateral line. Dev Dyn 2013; 242:832-46. [PMID: 23606225 DOI: 10.1002/dvdy.23973] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Revised: 03/22/2013] [Accepted: 03/23/2013] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND The posterior lateral line in zebrafish develops from a migrating primordium that deposits clusters of cells that differentiate into neuromasts at regular intervals along the trunk. The deposition of these neuromasts is known to be coordinated by Wnt and FGF signals that control the proliferation, migration, and organization of the primordium. However, little is known about the control of proliferation in the neuromasts following their deposition. RESULTS We show that pharmacological activation of the Wnt/β-catenin signaling pathway with 1-azakenpaullone upregulates proliferation in neuromasts post-deposition. This results in increased size of the neuromasts and overproduction of sensory hair cells. We also show that activation of Wnt signaling returns already quiescent supporting cells to a proliferative state in mature neuromasts. Additionally, activation of Wnt signaling increases the number of supporting cells that return to the cell cycle in response to hair cell damage and the number of regenerated hair cells. Finally, we show that inhibition of Wnt signaling by overexpression of dkk1b suppresses proliferation during both differentiation and regeneration. CONCLUSIONS These data suggest that Wnt/β-catenin signaling is both necessary and sufficient for the control of proliferation of lateral line progenitors during development, ongoing growth of the neuromasts, and hair cell regeneration.
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Affiliation(s)
- Jeffery R Head
- Neuroscience Program, Colgate University, Hamilton, New York, USA
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33
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Innervation is required for sense organ development in the lateral line system of adult zebrafish. Proc Natl Acad Sci U S A 2013; 110:5659-64. [PMID: 23509277 DOI: 10.1073/pnas.1214004110] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Superficial mechanosensory organs (neuromasts) distributed over the head and body of fishes and amphibians form the "lateral line" system. During zebrafish adulthood, each neuromast of the body (posterior lateral line system, or PLL) produces "accessory" neuromasts that remain tightly clustered, thereby increasing the total number of PLL neuromasts by a factor of more than 10. This expansion is achieved by a budding process and is accompanied by branches of the afferent nerve that innervates the founder neuromast. Here we show that innervation is essential for the budding process, in complete contrast with the development of the embryonic PLL, where innervation is entirely dispensable. To obtain insight into the molecular mechanisms that underlie the budding process, we focused on the terminal system that develops at the posterior tip of the body and on the caudal fin. In this subset of PLL neuromasts, bud neuromasts form in a reproducible sequence over a few days, much faster than for other PLL neuromasts. We show that wingless/int (Wnt) signaling takes place during, and is required for, the budding process. We also show that the Wnt activator R-spondin is expressed by the axons that innervate budding neuromasts. We propose that the axon triggers Wnt signaling, which itself is involved in the proliferative phase that leads to bud formation. Finally, we show that innervation is required not only for budding, but also for long-term maintenance of all PLL neuromasts.
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34
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Ghysen A, Dambly-Chaudière C, Coves D, de la Gandara F, Ortega A. Developmental origin of a major difference in sensory patterning between zebrafish and bluefin tuna. Evol Dev 2013. [PMID: 23189756 PMCID: PMC3488297 DOI: 10.1111/j.1525-142x.2012.00529.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The posterior lateral line system (PLL) of teleost fish comprises a number of mechanosensory organs arranged in defined patterns on the body surface. Embryonic patterns are largely conserved among teleosts, yet adult patterns are highly diverse. Although changes in pattern modify the perceptual abilities of the system, their developmental origin remains unknown. Here we compare the processes that underlie the formation of the juvenile PLL pattern in Thunnus thynnus, the bluefin tuna, to the processes that were elucidated in Danio rerio, the zebrafish. In both cases, the embryonic PLL comprises five neuromasts regularly spaced along the horizontal myoseptum, but the juvenile PLL comprises four roughly parallel anteroposterior lines in zebrafish, whereas it is a simple dorsally arched line in tuna fish. We examined whether this difference involves evolutionary novelties, and show that the same mechanisms mediate the transition from embryonic to juvenile patterns in both species. We conclude that the marked difference in juveniles depends on a single change (dorsal vs. ventral migration of neuromasts) in the first days of larval life.
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35
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Bercier V, Brustein E, Liao M, Dion PA, Lafrenière RG, Rouleau GA, Drapeau P. WNK1/HSN2 mutation in human peripheral neuropathy deregulates KCC2 expression and posterior lateral line development in zebrafish (Danio rerio). PLoS Genet 2013; 9:e1003124. [PMID: 23300475 PMCID: PMC3536653 DOI: 10.1371/journal.pgen.1003124] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Accepted: 10/13/2012] [Indexed: 12/05/2022] Open
Abstract
Hereditary sensory and autonomic neuropathy type 2 (HSNAII) is a rare pathology characterized by an early onset of severe sensory loss (all modalities) in the distal limbs. It is due to autosomal recessive mutations confined to exon "HSN2" of the WNK1 (with-no-lysine protein kinase 1) serine-threonine kinase. While this kinase is well studied in the kidneys, little is known about its role in the nervous system. We hypothesized that the truncating mutations present in the neural-specific HSN2 exon lead to a loss-of-function of the WNK1 kinase, impairing development of the peripheral sensory system. To investigate the mechanisms by which the loss of WNK1/HSN2 isoform function causes HSANII, we used the embryonic zebrafish model and observed strong expression of WNK1/HSN2 in neuromasts of the peripheral lateral line (PLL) system by immunohistochemistry. Knocking down wnk1/hsn2 in embryos using antisense morpholino oligonucleotides led to improper PLL development. We then investigated the reported interaction between the WNK1 kinase and neuronal potassium chloride cotransporter KCC2, as this transporter is a target of WNK1 phosphorylation. In situ hybridization revealed kcc2 expression in mature neuromasts of the PLL and semi-quantitative RT-PCR of wnk1/hsn2 knockdown embryos showed an increased expression of kcc2 mRNA. Furthermore, overexpression of human KCC2 mRNA in embryos replicated the wnk1/hsn2 knockdown phenotype. We validated these results by obtaining double knockdown embryos, both for wnk1/hsn2 and kcc2, which alleviated the PLL defects. Interestingly, overexpression of inactive mutant KCC2-C568A, which does not extrude ions, allowed a phenocopy of the PLL defects. These results suggest a pathway in which WNK1/HSN2 interacts with KCC2, producing a novel regulation of its transcription independent of KCC2's activation, where a loss-of-function mutation in WNK1 induces an overexpression of KCC2 and hinders proper peripheral sensory nerve development, a hallmark of HSANII.
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Affiliation(s)
- Valérie Bercier
- Department of Pathology and Cell Biology, Université de Montréal, Montréal, Québec, Canada
- Groupe de Recherche sur le Système Nerveux Central, Université de Montréal, Montréal, Québec, Canada
- Centre of Excellence in Neuroscience, Centre Hospitalier de l'Université de Montréal Research Center, Montréal, Québec, Canada
| | - Edna Brustein
- Department of Pathology and Cell Biology, Université de Montréal, Montréal, Québec, Canada
- Groupe de Recherche sur le Système Nerveux Central, Université de Montréal, Montréal, Québec, Canada
| | - Meijiang Liao
- Department of Pathology and Cell Biology, Université de Montréal, Montréal, Québec, Canada
- Groupe de Recherche sur le Système Nerveux Central, Université de Montréal, Montréal, Québec, Canada
| | - Patrick A. Dion
- Department of Pathology and Cell Biology, Université de Montréal, Montréal, Québec, Canada
- Centre of Excellence in Neuroscience, Centre Hospitalier de l'Université de Montréal Research Center, Montréal, Québec, Canada
| | - Ronald G. Lafrenière
- Centre of Excellence in Neuroscience, Centre Hospitalier de l'Université de Montréal Research Center, Montréal, Québec, Canada
| | - Guy A. Rouleau
- Centre of Excellence in Neuroscience, Centre Hospitalier de l'Université de Montréal Research Center, Montréal, Québec, Canada
- Department of Medicine, Faculty of Medicine, Université de Montréal, Montréal, Québec, Canada
| | - Pierre Drapeau
- Department of Pathology and Cell Biology, Université de Montréal, Montréal, Québec, Canada
- Groupe de Recherche sur le Système Nerveux Central, Université de Montréal, Montréal, Québec, Canada
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36
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Abstract
Teleosts are the largest and most diverse group of vertebrates, and many species undergo morphological, physiological, and behavioral transitions, "metamorphoses," as they progress between morphologically divergent life stages. The larval metamorphosis that generally occurs as teleosts mature from larva to juvenile involves the loss of embryo-specific features, the development of new adult features, major remodeling of different organ systems, and changes in physical proportions and overall phenotype. Yet, in contrast to anuran amphibians, for example, teleost metamorphosis can entail morphological change that is either sudden and profound, or relatively gradual and subtle. Here, we review the definition of metamorphosis in teleosts, the diversity of teleost metamorphic strategies and the transitions they involve, and what is known of their underlying endocrine and genetic bases. We suggest that teleost metamorphosis offers an outstanding opportunity for integrating our understanding of endocrine mechanisms, cellular processes of morphogenesis and differentiation, and the evolution of diverse morphologies and life histories.
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Affiliation(s)
- Sarah K. McMenamin
- Department of Biology, University of Washington, Seattle, Washington, USA
| | - David M. Parichy
- Department of Biology, University of Washington, Seattle, Washington, USA
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37
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Haehnel M, Taguchi M, Liao JC. Heterogeneity and dynamics of lateral line afferent innervation during development in zebrafish (Danio rerio). J Comp Neurol 2012; 520:1376-86. [PMID: 22102005 DOI: 10.1002/cne.22798] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The lateral line system of larval zebrafish is emerging as a model to study a range of topics in neurobiology, from hair cell regeneration to sensory processing. However, despite numerous studies detailing the patterning and development of lateral line neuromasts, little is known about the organization of their connections to afferent neurons and targets in the hindbrain. We found that as fish grow and neuromasts proliferate over the body surface, the number of afferent neurons increases linearly. The number of afferents innervating certain neuromasts increases over time, while it decreases for other neuromasts. The ratio of afferent neurons to neuromasts differs between the anterior and posterior lateral line system, suggesting potential differences in sensitivity threshold or spatial resolution. A single afferent neuron routinely contacts a group of neuromasts, suggesting that different afferent neurons can convey information about receptive fields along the body. When afferent projections are traced into the hindbrain, where a distinct somatotopy has been previously described, we find that this general organization is absent at the Mauthner cell. We speculate that directional input from the lateral line is less important at an early age, whereas the speed of the escape response is paramount, and that directional responses arise later in development. By quantifying morphological connections in the lateral line system, this study provides a detailed foundation to understand how hydrodynamic information is processed and ultimately translated into appropriate motor behaviors.
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Affiliation(s)
- Melanie Haehnel
- The Whitney Laboratory for Marine Bioscience, Department of Biology, University of Florida, St. Augustine, Florida 32080, USA
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38
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Philip S, Machado JP, Maldonado E, Vasconcelos V, O'Brien SJ, Johnson WE, Antunes A. Fish lateral line innovation: insights into the evolutionary genomic dynamics of a unique mechanosensory organ. Mol Biol Evol 2012; 29:3887-98. [PMID: 22844072 DOI: 10.1093/molbev/mss194] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The mechanosensory lateral line, found only in fishes and amphibians, is an important sense organ associated with aquatic life. Lateral line patterns differ among teleost, the most diverse vertebrate taxa, hypothetically in response to selective pressures from different aquatic habitats. In this article, we conduct evolutionary genomic analyses of 34 genes associated with lateral line system development in teleosts to elucidate the significance of contrasting evolutionary rates and changes in the protein coding sequences. We find that duplicated copies of these genes are preferentially retained in the teleost genomes and that episodic events of positive selection have occurred in 22 of the 30 postduplication branches. In general, teleost genes evolved at a faster rate relative to their tetrapod counterparts, and the mutation rates of 26 of the 34 genes differed among teleosts and tetrapods. We conclude that following whole genome duplication, evolutionary rates and episodic events of positive selection on the lateral line system development genes might have been one of the factors favoring the subsequent adaptive radiation of teleosts into diverse habitats. These results provide the foundation for further detailed explorations into lateral line system genes and the evolution of diverse phenotypes and adaptations.
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Affiliation(s)
- Siby Philip
- CIMAR/CIIMAR, Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Porto, Portugal
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39
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Shimizu N, Kawakami K, Ishitani T. Visualization and exploration of Tcf/Lef function using a highly responsive Wnt/β-catenin signaling-reporter transgenic zebrafish. Dev Biol 2012; 370:71-85. [PMID: 22842099 DOI: 10.1016/j.ydbio.2012.07.016] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 07/03/2012] [Accepted: 07/10/2012] [Indexed: 01/09/2023]
Abstract
Evolutionarily conserved Tcf/Lef transcription factors (Lef1, Tcf7, Tcf7l1, and Tcf7l2) mediate gene expression regulated by Wnt/β-catenin signaling, which has multiple roles in early embryogenesis, organogenesis, adult tissue homeostasis, and tissue regeneration. However, the spatiotemporal dynamics of Tcf/Lef activity during these events remain poorly understood. We generated stable transgenic zebrafish lines carrying a new Wnt/β-catenin signaling reporter, Tcf/Lef-miniP:dGFP. The reporter revealed the transcriptional activities of four Tcf/Lef members controlled by Wnt/β-catenin signaling, which were expressed in known Wnt/β-catenin signaling-active sites during embryogenesis, organ development and growth, and tissue regeneration. We used the transgenic lines to demonstrate the contribution of Tcf/Lef-mediated Wnt/β-catenin signaling to the development of the anterior lateral line, dorsal and secondary posterior lateral lines, and gill filaments. Thus, these reporter lines are highly useful tools for studying Tcf/Lef-mediated Wnt/β-catenin signaling-dependent processes.
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Affiliation(s)
- Nobuyuki Shimizu
- Division of Cell Regulation Systems, Department of Immunobiology and Neuroscience, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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40
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Liao JC, Haehnel M. Physiology of afferent neurons in larval zebrafish provides a functional framework for lateral line somatotopy. J Neurophysiol 2012; 107:2615-23. [PMID: 22338025 DOI: 10.1152/jn.01108.2011] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Fishes rely on the neuromasts of their lateral line system to detect water flow during behaviors such as predator avoidance and prey localization. Although the pattern of neuromast development has been a topic of detailed research, we still do not understand the functional consequences of its organization. Previous work has demonstrated somatotopy in the posterior lateral line, whereby afferent neurons that contact more caudal neuromasts project more dorsally in the hindbrain than those that contact more rostral neuromasts (Gompel N, Dambly-Chaudiere C, Ghysen A. Development 128: 387-393, 2001). We performed patch-clamp recordings of afferent neurons that contact neuromasts in the posterior lateral line of anesthetized, transgenic larval zebrafish (Danio rerio) to show that larger cells are born earlier, have a lower input resistance, a lower spontaneous firing rate, and tend to contact multiple neuromasts located closer to the tail than smaller neurons, which are born later, have a higher input resistance, a higher spontaneous firing rate, and tend to contact single neuromasts. We suggest that early-born neurons are poised to detect large stimuli during the initial stages of development. Later-born neurons are more easily driven to fire and thus likely to be more sensitive to local, weaker flows. Afferent projections onto identified glutamatergic regions in the hindbrain lead us to hypothesize a novel mechanism for lateral line somatotopy. We show that afferent fibers associated with tail neuromasts respond to stronger stimuli and are wired to dorsal hindbrain regions associated with Mauthner-mediated escape responses and fast, avoidance swimming. The ability to process flow stimuli by circumventing higher-order brain centers would ease the task of processing where speed is of critical importance. Our work lays the groundwork to understand how the lateral line translates flow stimuli into appropriate behaviors at the single cell level.
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Affiliation(s)
- James C Liao
- The Whitney Laboratory for Marine Bioscience, Dept. of Biology, Univ. of Florida, St. Augustine, FL 32080, USA.
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41
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Amato V, Viña E, Calavia MG, Guerrera MC, Laurà R, Navarro M, De Carlos F, Cobo J, Germanà A, Vega JA. TRPV4 in the sensory organs of adult zebrafish. Microsc Res Tech 2011; 75:89-96. [PMID: 21678526 DOI: 10.1002/jemt.21029] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2011] [Accepted: 04/13/2011] [Indexed: 11/11/2022]
Abstract
TRPV4 is a nonselective cation channel that belongs to the vanilloid (V) subfamily of transient receptor potential (TRP) ion channels. While TRP channels have been found to be involved in sensing temperature, light, pressure, and chemical stimuli, TPRV4 is believed to be primarily a mechanosensor although it can also respond to warm temperatures, acidic pH, and several chemical compounds. In zebrafish, the expression of trpv4 has been studied during embryonic development, whereas its pattern of TPRV4 expression during the adult life has not been thoroughly analyzed. In this study, the occurrence of TRPV4 was addressed in the zebrafish sensory organs at the mRNA (RT-PCR) and protein (Westernblot) levels. Once the occurrence of TRPV4 was demonstrated, the TRPV4 positive cells were identified by using immunohistochemistry. TPRV4 was detected in mantle and sensory cells of neuromasts, in a subpopulation of hair sensory cells in the macula and in the cristae ampullaris of the inner ear, in sensory cells in the taste buds, in crypt neurons and ciliated sensory neurons of the olfactory epithelium, and in cells of the retina. These results demonstrate the presence of TRPV4 in all sensory organs of adult zebrafish and are consistent with the multiple physiological functions suspected for TRPV4 in mammals (mechanosensation, hearing, and temperature sensing), but furthermore suggest potential roles in olfaction and vision in zebrafish.
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Affiliation(s)
- V Amato
- Dipartimento di MORBIFIPA, Sezione di Morfología, Università degli Studi di Messina, Italy
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42
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Zichichi R, Magnoli D, Montalbano G, Laurà R, Vega JA, Ciriaco E, Germanà A. Aquaporin 4 in the sensory organs of adult zebrafish (Danio rerio). Brain Res 2011; 1384:23-8. [PMID: 21334314 DOI: 10.1016/j.brainres.2011.02.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 01/20/2011] [Accepted: 02/04/2011] [Indexed: 01/17/2023]
Abstract
The aquaporins (AQPs) are a family (AQP-AQP10) of transmembrane channel proteins that mediate the transport of water, ions, gases, and small molecules across the cell membrane, thus regulating cell homeostasis. AQP4 has the highest water permeability and it is involved in hearing and vision in mammals. Here, we used immunohistochemistry to map the presence of AQP4 in the sensory organs of adult zebrafish. The antibody used detected by Western blot proteins of 34 kDa (equivalent to that of mammalian AQP4) and maps in the sensory cells of taste buds, the hair sensory cells of the neuromast and of the maculae, and cristae ampullaris of the inner ear. Moreover, the retinal photoreceptors display AQP4 immunoreactivity. The non-sensory cells in these organs were AQP4 negative. These results suggest that the AQP4 could play a role in the regulation of water balance and ion transport in the sensory cells of zebrafish, bringing new data for the utilizing of this experimental model in the biology of sensory system.
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Affiliation(s)
- Rosalia Zichichi
- Dipartimento di Morfologia, Biochimica, Fisiologia e Produzione Animale, Sezione di Morfologia, Università di Messina, Messina, Italia
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43
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Abstract
Dorsal root ganglion (DRG) sensory neurons transmit all somatosensory information from the trunk region of the body. erbb3 mutant zebrafish do not form DRG neurons because the neural crest cells that generate them migrate aberrantly. Here we report that homozygous erbb3 mutants appear to swim and feed normally, and that they survive through adulthood, despite never forming DRG neurons. The source of sensory compensation in adult erbb3 mutants remains unknown, although it may be from lateral line ganglion neuromasts which are reduced, but present, in erbb3 mutants. We also provide new information about the development of DRG neurons in wild-type juvenile zebrafish.
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Affiliation(s)
- Yasuko Honjo
- Institute of Neuroscience, University of Oregon, Eugene, OR, USA.
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44
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Malicki J, Avanesov A, Li J, Yuan S, Sun Z. Analysis of cilia structure and function in zebrafish. Methods Cell Biol 2011; 101:39-74. [PMID: 21550439 DOI: 10.1016/b978-0-12-387036-0.00003-7] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The cilium, a previously little studied cell surface protrusion, has emerged as an important organelle in vertebrate cells. This tiny structure is essential for normal embryonic development, including the formation of left-right asymmetry, limb morphogenesis, and the differentiation of sensory cells. In the adult, cilia also function in a variety of processes, such as the survival of photoreceptor cells, and the homeostasis in several tissues, including the epithelia of nephric ducts. Human ciliary malfunction is associated with situs inversus, kidney cysts, polydactyly, blindness, mental retardation, obesity, and many other abnormalities. The genetic accessibility and optical transparency of the zebrafish make it an excellent vertebrate model system to study cilia biology. In this chapter, we describe the morphology and distribution of cilia in zebrafish embryonic and larval organs. We also provide essential protocols to analyze cilia formation and function.
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Affiliation(s)
- Jarema Malicki
- Division of Craniofacial and Molecular Genetics, Tufts University, Massachusetts, USA
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45
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Pujol-Martí J, Baudoin JP, Faucherre A, Kawakami K, López-Schier H. Progressive neurogenesis defines lateralis somatotopy. Dev Dyn 2010; 239:1919-30. [PMID: 20549716 DOI: 10.1002/dvdy.22320] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Fishes and amphibians localize hydromechanical variations along their bodies using the lateral-line sensory system. This is possible because the spatial distribution of neuromasts is represented in the hindbrain by a somatotopic organization of the lateralis afferent neurons' central projections. The mechanisms that establish lateralis somatotopy are not known. Using BAPTI and neuronal tracing in the zebrafish, we demonstrate growth anisotropy of the posterior lateralis ganglion. We characterized a new transgenic line for in vivo imaging to show that although peripheral growth-cone structure adumbrates somatotopy, the order of neurogenesis represents a more accurate predictor of the position of a neuron's central axon along the somatotopic axis in the hindbrain. We conclude that progressive neurogenesis defines lateralis somatotopy.
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Affiliation(s)
- Jesús Pujol-Martí
- Laboratory of Sensory Cell Biology and Organogenesis, Centre de Regulació Genòmica, Barcelona, Spain
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46
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Parichy DM, Elizondo MR, Mills MG, Gordon TN, Engeszer RE. Normal table of postembryonic zebrafish development: staging by externally visible anatomy of the living fish. Dev Dyn 2010; 238:2975-3015. [PMID: 19891001 DOI: 10.1002/dvdy.22113] [Citation(s) in RCA: 512] [Impact Index Per Article: 36.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The zebrafish is a premier model organism yet lacks a system for assigning postembryonic fish to developmental stages. To provide such a staging series, we describe postembryonic changes in several traits that are visible under brightfield illumination or through vital staining and epiflourescent illumination. These include the swim bladder, median and pelvic fins, pigment pattern, scale formation, larval fin fold, and skeleton. We further identify milestones for placing postembryonic fish into discrete stages. We relate these milestones to changes in size and age and show that size is a better indicator of developmental progress than is age. We also examine how relationships between size and developmental progress vary with temperature and density, and we document the effects of histological processing on size. To facilitate postembryonic staging, we provide images of reference individuals that have attained specific developmental milestones and are of defined sizes. Finally, we provide guidelines for reporting stages that provide information on both discrete and continuous changes in growth and development.
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Affiliation(s)
- David M Parichy
- Department of Biology, University of Washington, Seattle, Washington 91895, USA
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47
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Liao JC. Organization and physiology of posterior lateral line afferent neurons in larval zebrafish. Biol Lett 2010; 6:402-5. [PMID: 20181553 DOI: 10.1098/rsbl.2009.0995] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The lateral line system of larval zebrafish can translate hydrodynamic signals from the environment to guide body movements. Here, I demonstrate a spatial relationship between the organization of afferent neurons in the lateral line ganglion and the innervation of neuromasts along the body. I developed a whole cell patch clamp recording technique to show that afferents innervate multiple direction-sensitive neuromasts, which are sensitive to low fluid velocities. This work lays the foundation to integrate sensory neuroscience and the hydrodynamics of locomotion in a model genetic system.
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Affiliation(s)
- James C Liao
- The Whitney Laboratory for Marine Bioscience-Department of Biology, St Augustine, FL, USA.
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48
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Wada H, Ghysen A, Satou C, Higashijima SI, Kawakami K, Hamaguchi S, Sakaizumi M. Dermal morphogenesis controls lateral line patterning during postembryonic development of teleost fish. Dev Biol 2010; 340:583-94. [PMID: 20171200 DOI: 10.1016/j.ydbio.2010.02.017] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2009] [Revised: 02/10/2010] [Accepted: 02/10/2010] [Indexed: 01/27/2023]
Abstract
The lateral line system displays highly divergent patterns in adult teleost fish. The mechanisms underlying this variability are poorly understood. Here, we demonstrate that the lateral line mechanoreceptor, the neuromast, gives rise to a series of accessory neuromasts by a serial budding process during postembryonic development in zebrafish. We also show that accessory neuromast formation is highly correlated to the development of underlying dermal structures such as bones and scales. Abnormalities in opercular bone morphogenesis, in endothelin 1-knockdown embryos, are accompanied by stereotypic errors in neuromast budding and positioning, further demonstrating the tight correlation between the patterning of neuromasts and of the underlying dermal bones. In medaka, where scales form between peridermis and opercular bones, the lateral line displays a scale-specific pattern which is never observed in zebrafish. These results strongly suggest a control of postembryonic neuromast patterns by underlying dermal structures. This dermal control may explain some aspects of the evolution of lateral line patterns.
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Affiliation(s)
- Hironori Wada
- Center for Transdisciplinary Research, Niigata University, Igarashi 2, Nishi-ku, Niigata 950-2181, Japan.
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49
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Nuñez VA, Sarrazin AF, Cubedo N, Allende ML, Dambly-Chaudière C, Ghysen A. Postembryonic development of the posterior lateral line in the zebrafish. Evol Dev 2009; 11:391-404. [DOI: 10.1111/j.1525-142x.2009.00346.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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50
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Affiliation(s)
- Eva Y Ma
- University of Washington, Box 357420, Seattle, WA 98195-7420, USA
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