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Che X, Huang Y, Zhong K, Jia K, Wei Y, Meng Y, Yuan W, Lu H. Thiophanate-methyl induces notochord toxicity by activating the PI3K-mTOR pathway in zebrafish (Danio rerio) embryos. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 318:120861. [PMID: 36563988 DOI: 10.1016/j.envpol.2022.120861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 12/10/2022] [Accepted: 12/10/2022] [Indexed: 06/17/2023]
Abstract
Thiophanate-methyl (TM), a typical pesticide widely used worldwide, was detected in rivers, soil, fruits, and vegetables. Thus, it is urgent to identify the potential harm of TM residual to non-target organisms and its molecular mechanisms. We used zebrafish (Danio rerio) in this study to evaluate TM toxicity. TM exposure induced developmental toxicity, including inhibited hatchability, reduced heart rates, restrained spontaneous locomotion, and decreased body length. Furthermore, we observed obvious toxicity in the notochord and detected increased expression levels of notochord-related genes (shha, col2a, and tbxta) by in situ hybridization in zebrafish larvae. In addition, calcein staining, alkaline phosphatase (ALP) activity analysis, and anatomic analysis indicated that TM induced notochord toxicity. We used rescue experiments to verify whether the PI3K-mTOR pathway involved in the notochord development was the cause of notochord abnormalities. Rapamycin and LY294002 (an inhibitor of PI3K) relieve notochord toxicity caused by TM, including morphological abnormalities. In summary, TM might induce notochord toxicity by activating the PI3K-mTOR pathway in zebrafish.
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Affiliation(s)
- Xiaofang Che
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China
| | - Yong Huang
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China; College of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China
| | - Keyuan Zhong
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China
| | - Kun Jia
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China
| | - You Wei
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China; College of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China
| | - Yunlong Meng
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China; College of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China
| | - Wei Yuan
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China
| | - Huiqiang Lu
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China; Affiliated Hospital of Jinggangshan University, Center for Clinical Medicine Research of Jinggangshan University, China.
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2
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Effect of monosultap on notochord development in zebrafish (Danio rerio) embryos. Toxicology 2022; 477:153276. [PMID: 35933024 DOI: 10.1016/j.tox.2022.153276] [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: 04/06/2022] [Revised: 07/21/2022] [Accepted: 07/28/2022] [Indexed: 11/22/2022]
Abstract
Monosultap (Mon) is a broad-spectrum insecticide used in agricultural production to control stem borers in rice fields. Currently, little evidence shows how Mon affects notochord development in zebrafish (Danio rerio). In our study, zebrafish embryos were exposed to 0.25, 0.5, and 0.75 mg/L Mon to determine the effects of different concentrations of Mon on notochord development. Mon exposure reduced the body length, decreased the heart rate and hatchability, and induced notochord deformity in zebrafish. The effects of Mon exposure on the internal organization of the notochord and the structural abnormalities were determined based on histological staining of paraffinized tissue sections. Quantitative polymerase chain reaction (qPCR) and in situ hybridization findings revealed that the expression levels of genes related to notochord development (shha, col2a, and ptch2) showed an increasing trend in a concentration-dependent manner. An abnormal increase of apoptosis and cell proliferation in some parts of the notochord suggested that Mon exposure could cause developmental abnormality of the notochord. This study revealed the toxicity of Mon in notochord development. Our findings provide information in assessing the risk of Mon to the ecological environment and human health.
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3
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Sánchez-Iranzo H, Halavatyi A, Diz-Muñoz A. Strength of interactions in the Notch gene regulatory network determines patterning and fate in the notochord. eLife 2022; 11:75429. [PMID: 35658971 PMCID: PMC9170247 DOI: 10.7554/elife.75429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 04/28/2022] [Indexed: 11/13/2022] Open
Abstract
Development of multicellular organisms requires the generation of gene expression patterns that determines cell fate and organ shape. Groups of genetic interactions known as Gene Regulatory Networks (GRNs) play a key role in the generation of such patterns. However, how the topology and parameters of GRNs determine patterning in vivo remains unclear due to the complexity of most experimental systems. To address this, we use the zebrafish notochord, an organ where coin-shaped precursor cells are initially arranged in a simple unidimensional geometry. These cells then differentiate into vacuolated and sheath cells. Using newly developed transgenic tools together with in vivo imaging, we identify jag1a and her6/her9 as the main components of a Notch GRN that generates a lateral inhibition pattern and determines cell fate. Making use of this experimental system and mathematical modeling we show that lateral inhibition patterning is promoted when ligand-receptor interactions are stronger within the same cell than in neighboring cells. Altogether, we establish the zebrafish notochord as an experimental system to study pattern generation, and identify and characterize how the properties of GRNs determine self-organization of gene patterning and cell fate.
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Affiliation(s)
- Héctor Sánchez-Iranzo
- Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Aliaksandr Halavatyi
- Advanced Light Microscopy Facility, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Alba Diz-Muñoz
- Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, Heidelberg, Germany
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4
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Chowdhury K, Lin S, Lai SL. Comparative Study in Zebrafish and Medaka Unravels the Mechanisms of Tissue Regeneration. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.783818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Tissue regeneration has been in the spotlight of research for its fascinating nature and potential applications in human diseases. The trait of regenerative capacity occurs diversely across species and tissue contexts, while it seems to decline over evolution. Organisms with variable regenerative capacity are usually distinct in phylogeny, anatomy, and physiology. This phenomenon hinders the feasibility of studying tissue regeneration by directly comparing regenerative with non-regenerative animals, such as zebrafish (Danio rerio) and mice (Mus musculus). Medaka (Oryzias latipes) is a fish model with a complete reference genome and shares a common ancestor with zebrafish approximately 110–200 million years ago (compared to 650 million years with mice). Medaka shares similar features with zebrafish, including size, diet, organ system, gross anatomy, and living environment. However, while zebrafish regenerate almost every organ upon experimental injury, medaka shows uneven regenerative capacity. Their common and distinct biological features make them a unique platform for reciprocal analyses to understand the mechanisms of tissue regeneration. Here we summarize current knowledge about tissue regeneration in these fish models in terms of injured tissues, repairing mechanisms, available materials, and established technologies. We further highlight the concept of inter-species and inter-organ comparisons, which may reveal mechanistic insights and hint at therapeutic strategies for human diseases.
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5
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Hoyle DJ, Dranow DB, Schilling TF. Pthlha and mechanical force control early patterning of growth zones in the zebrafish craniofacial skeleton. Development 2022; 149:dev199826. [PMID: 34919126 PMCID: PMC8917414 DOI: 10.1242/dev.199826] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 12/07/2021] [Indexed: 11/23/2022]
Abstract
Secreted signals in patterning systems often induce repressive signals that shape their distributions in space and time. In developing growth plates (GPs) of endochondral long bones, Parathyroid hormone-like hormone (Pthlh) inhibits Indian hedgehog (Ihh) to form a negative-feedback loop that controls GP progression and bone size. Whether similar systems operate in other bones and how they arise during embryogenesis remain unclear. We show that Pthlha expression in the zebrafish craniofacial skeleton precedes chondrocyte differentiation and restricts where cells undergo hypertrophy, thereby initiating a future GP. Loss of Pthlha leads to an expansion of cells expressing a novel early marker of the hypertrophic zone (HZ), entpd5a, and later HZ markers, such as ihha, whereas local Pthlha misexpression induces ectopic entpd5a expression. Formation of this early pre-HZ correlates with onset of muscle contraction and requires mechanical force; paralysis leads to loss of entpd5a and ihha expression in the pre-HZ, mislocalized pthlha expression and no subsequent ossification. These results suggest that local Pthlh sources combined with force determine HZ locations, establishing the negative-feedback loop that later maintains GPs.
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Affiliation(s)
| | | | - Thomas F. Schilling
- Department of Developmental and Cell Biology, University of California, Irvine, CA 92693, USA
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6
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López-Cuevas P, Deane L, Yang Y, Hammond CL, Kague E. Transformed notochordal cells trigger chronic wounds destabilizing the vertebral column and bone homeostasis. Dis Model Mech 2021; 14:dmm.047001. [PMID: 33579726 PMCID: PMC7988777 DOI: 10.1242/dmm.047001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 02/01/2021] [Indexed: 12/14/2022] Open
Abstract
Notochordal cells play a pivotal role in vertebral column patterning, contributing to the formation of the inner architecture of intervertebral discs (IVDs). Their disappearance during development has been associated with reduced repair capacity and IVD degeneration. Notochord cells can give rise to chordomas, a highly invasive bone cancer associated with late diagnosis. Understanding the impact of neoplastic cells during development and on the surrounding vertebral column could open avenues for earlier intervention and therapeutics. We investigated the impact of transformed notochord cells in the zebrafish skeleton using a line expressing RAS in the notochord under the control of the kita promoter, with the advantage of adulthood endurance. Transformed cells caused damage in the notochord and destabilised the sheath layer, triggering a wound repair mechanism, with enrolment of sheath cells (col9a2+) and expression of wt1b, similar to induced notochord wounds. Moreover, increased recruitment of neutrophils and macrophages, displaying abnormal behaviour in proximity to the notochord sheath and transformed cells, supported parallels between chordomas, wound and inflammation. Cancerous notochordal cells interfere with differentiation of sheath cells to form chordacentra domains, leading to fusions and vertebral clefts during development. Adults displayed IVD irregularities reminiscent of degeneration, including reduced bone mineral density and increased osteoclast activity, along with disorganised osteoblasts and collagen, indicating impaired bone homeostasis. By depleting inflammatory cells, we abrogated chordoma development and rescued the skeletal features of the vertebral column. Therefore, we showed that transformed notochord cells alter the skeleton during life, causing a wound-like phenotype and activating chronic wound response, suggesting parallels between chordoma, wound, IVD degeneration and inflammation, highlighting inflammation as a promising target for future therapeutics. This article has an associated First Person interview with the first author of the paper. Summary: Analyses using a zebrafish line expressing RAS in the notochord, under the control of the kita promoter, revealed that transformed notochord cells alter the skeleton during life, causing a wound-like phenotype and activating chronic wound response.
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Affiliation(s)
- Paco López-Cuevas
- The School of Biochemistry, Biomedical Sciences, University of Bristol, BS8 1TD, UK
| | - Luke Deane
- The School of Biochemistry, Biomedical Sciences, University of Bristol, BS8 1TD, UK
| | - Yushi Yang
- School of Physics, HH Wills Physics Laboratory, University of Bristol, BS8 1TL, UK.,Centre for Nanoscience and Quantum Information, University of Bristol, Bristol, BS8 1FD, UK.,Bristol Centre for Functional Nanomaterials, University of Bristol, Bristol, BS8 1TL, UK
| | - Chrissy L Hammond
- The School of Physiology, Pharmacology and Neuroscience, Biomedical Sciences, University of Bristol, BS8 1TD, UK
| | - Erika Kague
- The School of Physiology, Pharmacology and Neuroscience, Biomedical Sciences, University of Bristol, BS8 1TD, UK
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7
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Kennard A, Prinz C, Labuz E, Theriot J. Wounding Zebrafish Larval Epidermis by Laceration. Bio Protoc 2021; 11:e4260. [DOI: 10.21769/bioprotoc.4260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 09/17/2021] [Accepted: 09/28/2021] [Indexed: 11/02/2022] Open
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8
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Holland ND, Somorjai IML. Serial blockface SEM suggests that stem cells may participate in adult notochord growth in an invertebrate chordate, the Bahamas lancelet. EvoDevo 2020; 11:22. [PMID: 33088474 PMCID: PMC7568382 DOI: 10.1186/s13227-020-00167-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Accepted: 10/07/2020] [Indexed: 01/07/2023] Open
Abstract
Background The cellular basis of adult growth in cephalochordates (lancelets or amphioxus) has received little attention. Lancelets and their constituent organs grow slowly but continuously during adult life. Here, we consider whether this slow organ growth involves tissue-specific stem cells. Specifically, we focus on the cell populations in the notochord of an adult lancelet and use serial blockface scanning electron microscopy (SBSEM) to reconstruct the three-dimensional fine structure of all the cells in a tissue volume considerably larger than normally imaged with this technique. Results In the notochordal region studied, we identified 10 cells with stem cell-like morphology at the posterior tip of the organ, 160 progenitor (Müller) cells arranged along its surface, and 385 highly differentiated lamellar cells constituting its core. Each cell type could clearly be distinguished on the basis of cytoplasmic density and overall cell shape. Moreover, because of the large sample size, transitions between cell types were obvious. Conclusions For the notochord of adult lancelets, a reasonable interpretation of our data indicates growth of the organ is based on stem cells that self-renew and also give rise to progenitor cells that, in turn, differentiate into lamellar cells. Our discussion compares the cellular basis of adult notochord growth among chordates in general. In the vertebrates, several studies implied that proliferating cells (chordoblasts) in the cortex of the organ might be stem cells. However, we think it is more likely that such cells actually constitute a progenitor population downstream from and maintained by inconspicuous stem cells. We venture to suggest that careful searches should find stem cells in the adult notochords of many vertebrates, although possibly not in the notochordal vestiges (nucleus pulposus regions) of mammals, where the presence of endogenous proliferating cells remains controversial.
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Affiliation(s)
- Nicholas D Holland
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California At San Diego, La Jolla, CA 92093 USA
| | - Ildiko M L Somorjai
- School of Biology, University of Saint Andrews, St. Andrews, KY16 9ST Scotland
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9
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Abstract
The vertebrate body plan is characterized by the presence of a segmented spine along its main axis. Here, we examine the current understanding of how the axial tissues that are formed during embryonic development give rise to the adult spine and summarize recent advances in the field, largely focused on recent studies in zebrafish, with comparisons to amniotes where appropriate. We discuss recent work illuminating the genetics and biological mechanisms mediating extension and straightening of the body axis during development, and highlight open questions. We specifically focus on the processes of notochord development and cerebrospinal fluid physiology, and how defects in those processes may lead to scoliosis.
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Affiliation(s)
- Michel Bagnat
- Department of Cell Biology, Duke University, Durham, NC, 27710, USA
| | - Ryan S Gray
- Department of Nutritional Sciences, University of Texas at Austin, Dell Pediatrics Research Institute, Austin, TX, 78723, USA
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10
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Sanz-Morejón A, García-Redondo AB, Reuter H, Marques IJ, Bates T, Galardi-Castilla M, Große A, Manig S, Langa X, Ernst A, Piragyte I, Botos MA, González-Rosa JM, Ruiz-Ortega M, Briones AM, Salaices M, Englert C, Mercader N. Wilms Tumor 1b Expression Defines a Pro-regenerative Macrophage Subtype and Is Required for Organ Regeneration in the Zebrafish. Cell Rep 2020; 28:1296-1306.e6. [PMID: 31365871 PMCID: PMC6685527 DOI: 10.1016/j.celrep.2019.06.091] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 04/25/2019] [Accepted: 06/25/2019] [Indexed: 12/16/2022] Open
Abstract
Organ regeneration is preceded by the recruitment of innate immune cells, which play an active role during repair and regrowth. Here, we studied macrophage subtypes during organ regeneration in the zebrafish, an animal model with a high regenerative capacity. We identified a macrophage subpopulation expressing Wilms tumor 1b (wt1b), which accumulates within regenerating tissues. This wt1b+ macrophage population exhibited an overall pro-regenerative gene expression profile and different migratory behavior compared to the remainder of the macrophages. Functional studies showed that wt1b regulates macrophage migration and retention at the injury area. Furthermore, wt1b-null mutant zebrafish presented signs of impaired macrophage differentiation, delayed fin growth upon caudal fin amputation, and reduced cardiomyocyte proliferation following cardiac injury that correlated with altered macrophage recruitment to the regenerating areas. We describe a pro-regenerative macrophage subtype in the zebrafish and a role for wt1b in organ regeneration. Wt1b+ macrophages reveal a pro-regenerative gene expression prolife Wt1b controls migration behavior of macrophages during fin and heart regeneration Wt1b regulates differentiation of macrophages in the kidney marrow wt1b mutants reveal impaired fin and heart regeneration
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Affiliation(s)
- Andrés Sanz-Morejón
- Institute of Anatomy, University of Bern, 3012 Bern, Switzerland; Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Ana B García-Redondo
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain; Department of Pharmacology, Universidad Autónoma de Madrid, IIS-Hospital La Paz, Ciber de Enfermedades Cardiovasculares, 28029 Madrid, Spain
| | - Hanna Reuter
- Leibniz Institute on Aging-Fritz Lipmann Institute, 07745 Jena, Germany
| | - Inês J Marques
- Institute of Anatomy, University of Bern, 3012 Bern, Switzerland
| | - Thomas Bates
- Leibniz Institute on Aging-Fritz Lipmann Institute, 07745 Jena, Germany
| | | | - Andreas Große
- Leibniz Institute on Aging-Fritz Lipmann Institute, 07745 Jena, Germany
| | - Steffi Manig
- Leibniz Institute on Aging-Fritz Lipmann Institute, 07745 Jena, Germany
| | - Xavier Langa
- Institute of Anatomy, University of Bern, 3012 Bern, Switzerland
| | - Alexander Ernst
- Institute of Anatomy, University of Bern, 3012 Bern, Switzerland
| | - Indre Piragyte
- Institute of Anatomy, University of Bern, 3012 Bern, Switzerland
| | | | | | - Marta Ruiz-Ortega
- Cellular Biology in Renal Diseases Laboratory, IIS-Fundación Jiménez Díaz, Universidad Autónoma, 28040 Madrid, Spain
| | - Ana M Briones
- Department of Pharmacology, Universidad Autónoma de Madrid, IIS-Hospital La Paz, Ciber de Enfermedades Cardiovasculares, 28029 Madrid, Spain
| | - Mercedes Salaices
- Department of Pharmacology, Universidad Autónoma de Madrid, IIS-Hospital La Paz, Ciber de Enfermedades Cardiovasculares, 28029 Madrid, Spain
| | - Christoph Englert
- Leibniz Institute on Aging-Fritz Lipmann Institute, 07745 Jena, Germany; Institute of Biochemistry and Biophysics, Friedrich-Schiller-Universität, 07743 Jena, Germany
| | - Nadia Mercader
- Institute of Anatomy, University of Bern, 3012 Bern, Switzerland; Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.
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11
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Development and regeneration dynamics of the Medaka notochord. Dev Biol 2020; 463:11-25. [PMID: 32173318 DOI: 10.1016/j.ydbio.2020.03.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 02/14/2020] [Accepted: 03/02/2020] [Indexed: 02/07/2023]
Abstract
The notochord is an embryonic tissue that acts as a hydrostatic skeleton until ossification begins in vertebrates. It is composed of outer sheath cells and inner vacuolated cells, which are generated from a common pool of disc-shaped precursors. Notochord extension during early embryogenesis is driven by the growth of vacuolated cells, reflecting in turn the expansion of their inner vacuole. Here we use desmogon, a novel desmosomal cadherin, to follow notochord development and regeneration in medaka (Oryzias latipes). We trace desmogon + disc-shaped precursors at the single cell level to demonstrate that they operate as unipotent progenitors, giving rise to either sheath or vacuolated cells. We reveal that once specified, vacuolated cells grow asynchronously and drive notochord expansion bi-directionally. Additionally, we uncover distinct regenerative responses in the notochord, which depend on the nature of the injury sustained. By generating a desmogon CRISPR mutant we demonstrate that this cadherin is essential for proper vacuolated cell shape and therefore correct notochord and spine morphology. Our work expands the repertoire of model systems to study dynamic aspects of the notochord in vivo, and provides new insights in its development and regeneration properties.
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12
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Bagwell J, Norman J, Ellis K, Peskin B, Hwang J, Ge X, Nguyen SV, McMenamin SK, Stainier DY, Bagnat M. Notochord vacuoles absorb compressive bone growth during zebrafish spine formation. eLife 2020; 9:51221. [PMID: 31995030 PMCID: PMC7012607 DOI: 10.7554/elife.51221] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 01/28/2020] [Indexed: 12/27/2022] Open
Abstract
The vertebral column or spine assembles around the notochord rod which contains a core made of large vacuolated cells. Each vacuolated cell possesses a single fluid-filled vacuole, and loss or fragmentation of these vacuoles in zebrafish leads to spine kinking. Here, we identified a mutation in the kinase gene dstyk that causes fragmentation of notochord vacuoles and a severe congenital scoliosis-like phenotype in zebrafish. Live imaging revealed that Dstyk regulates fusion of membranes with the vacuole. We find that localized disruption of notochord vacuoles causes vertebral malformation and curving of the spine axis at those sites. Accordingly, in dstyk mutants the spine curves increasingly over time as vertebral bone formation compresses the notochord asymmetrically, causing vertebral malformations and kinking of the axis. Together, our data show that notochord vacuoles function as a hydrostatic scaffold that guides symmetrical growth of vertebrae and spine formation.
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Affiliation(s)
- Jennifer Bagwell
- Department of Cell Biology, Duke University, Durham, United States
| | - James Norman
- Department of Cell Biology, Duke University, Durham, United States
| | - Kathryn Ellis
- Department of Cell Biology, Duke University, Durham, United States
| | - Brianna Peskin
- Department of Cell Biology, Duke University, Durham, United States
| | - James Hwang
- Department of Cell Biology, Duke University, Durham, United States
| | - Xiaoyan Ge
- Department of Biochemistry & Biophysics, University of California, San Francisco, San Francisco, United States
| | - Stacy V Nguyen
- Biology Department, Boston College, Boston, United States
| | | | - Didier Yr Stainier
- Department of Biochemistry & Biophysics, University of California, San Francisco, San Francisco, United States.,Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Michel Bagnat
- Department of Cell Biology, Duke University, Durham, United States
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13
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Dstyk mutation leads to congenital scoliosis-like vertebral malformations in zebrafish via dysregulated mTORC1/TFEB pathway. Nat Commun 2020; 11:479. [PMID: 31980602 PMCID: PMC6981171 DOI: 10.1038/s41467-019-14169-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 12/17/2019] [Indexed: 02/07/2023] Open
Abstract
Congenital scoliosis (CS) is a complex genetic disorder characterized by vertebral malformations. The precise etiology of CS is not fully defined. Here, we identify that mutation in dual serine/threonine and tyrosine protein kinase (dstyk) lead to CS-like vertebral malformations in zebrafish. We demonstrate that the scoliosis in dstyk mutants is related to the wavy and malformed notochord sheath formation and abnormal axial skeleton segmentation due to dysregulated biogenesis of notochord vacuoles and notochord function. Further studies show that DSTYK is located in late endosomal/lysosomal compartments and is involved in the lysosome biogenesis in mammalian cells. Dstyk knockdown inhibits notochord vacuole and lysosome biogenesis through mTORC1-dependent repression of TFEB nuclear translocation. Inhibition of mTORC1 activity can rescue the defect in notochord vacuole biogenesis and scoliosis in dstyk mutants. Together, our findings reveal a key role of DSTYK in notochord vacuole biogenesis, notochord morphogenesis and spine development through mTORC1/TFEB pathway. Congenital scoliosis is a complex genetic disorder characterized by vertebral malformation. Here, the authors demonstrate that loss of dstyk leads to scoliosis in zebrafish due to dysregulated biogenesis of notochord vacuoles and that DSTYK is required for lysosome biogenesis through mTORC1 regulation.
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14
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Korzelius J, Azami S, Ronnen-Oron T, Koch P, Baldauf M, Meier E, Rodriguez-Fernandez IA, Groth M, Sousa-Victor P, Jasper H. The WT1-like transcription factor Klumpfuss maintains lineage commitment of enterocyte progenitors in the Drosophila intestine. Nat Commun 2019; 10:4123. [PMID: 31511511 PMCID: PMC6739418 DOI: 10.1038/s41467-019-12003-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 08/09/2019] [Indexed: 01/01/2023] Open
Abstract
In adult epithelial stem cell lineages, the precise differentiation of daughter cells is critical to maintain tissue homeostasis. Notch signaling controls the choice between absorptive and entero-endocrine cell differentiation in both the mammalian small intestine and the Drosophila midgut, yet how Notch promotes lineage restriction remains unclear. Here, we describe a role for the transcription factor Klumpfuss (Klu) in restricting the fate of enteroblasts (EBs) in the Drosophila intestine. Klu is induced in Notch-positive EBs and its activity restricts cell fate towards the enterocyte (EC) lineage. Transcriptomics and DamID profiling show that Klu suppresses enteroendocrine (EE) fate by repressing the action of the proneural gene Scute, which is essential for EE differentiation. Loss of Klu results in differentiation of EBs into EE cells. Our findings provide mechanistic insight into how lineage commitment in progenitor cell differentiation can be ensured downstream of initial specification cues. Notch signaling mediates intestinal enteroblast specification in Drosophila but the molecular mechanism as to how this is regulated is unclear. Here, the authors show that the transcription factor Klumpfuss ensures enteroblast commitment through repression of enteroendocrine cell fate downstream of Notch.
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Affiliation(s)
- Jerome Korzelius
- Leibniz Institute on Aging-Fritz Lipmann Institute (FLI), Jena, Germany. .,Max-Planck-Institute for Biology of Aging, Cologne, Germany.
| | - Sina Azami
- Leibniz Institute on Aging-Fritz Lipmann Institute (FLI), Jena, Germany.,Max-Planck-Institute for Biology of Aging, Cologne, Germany
| | - Tal Ronnen-Oron
- Buck Institute for Research on Aging, 8001 Redwood Boulevard, Novato, CA, 94945-1400, USA
| | - Philipp Koch
- Leibniz Institute on Aging-Fritz Lipmann Institute (FLI), Jena, Germany
| | - Maik Baldauf
- Leibniz Institute on Aging-Fritz Lipmann Institute (FLI), Jena, Germany
| | - Elke Meier
- Leibniz Institute on Aging-Fritz Lipmann Institute (FLI), Jena, Germany
| | | | - Marco Groth
- Leibniz Institute on Aging-Fritz Lipmann Institute (FLI), Jena, Germany
| | - Pedro Sousa-Victor
- Buck Institute for Research on Aging, 8001 Redwood Boulevard, Novato, CA, 94945-1400, USA
| | - Heinrich Jasper
- Leibniz Institute on Aging-Fritz Lipmann Institute (FLI), Jena, Germany. .,Buck Institute for Research on Aging, 8001 Redwood Boulevard, Novato, CA, 94945-1400, USA. .,Immunology Discovery, Genentech, Inc., 1 DNA Way, South San Francisco, CA, 94080, USA.
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15
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Currie JD, Grosser L, Murawala P, Schuez M, Michel M, Tanaka EM, Sandoval-Guzmán T. The Prrx1 limb enhancer marks an adult subpopulation of injury-responsive dermal fibroblasts. Biol Open 2019; 8:bio.043711. [PMID: 31278164 PMCID: PMC6679413 DOI: 10.1242/bio.043711] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The heterogeneous properties of dermal cell populations have been posited to contribute toward fibrotic, imperfect wound healing in mammals. Here we characterize an adult population of dermal fibroblasts that maintain an active Prrx1 enhancer which originally marked mesenchymal limb progenitors. In contrast to their abundance in limb development, postnatal Prrx1 enhancer-positive cells (Prrx1enh+) make up a small subset of adult dermal cells (∼0.2%) and reside mainly within dermal perivascular and hair follicle niches. Lineage tracing of adult Prrx1enh+ cells shows that they remain in their niches and in small numbers over a long period of time. Upon injury however, Prrx1enh+ cells readily migrate into the wound bed and amplify, on average, 16-fold beyond their uninjured numbers. Additionally, following wounding dermal Prrx1enh+ cells are found out of their dermal niches and contribute to subcutaneous tissue. Postnatal Prrx1enh+ cells are uniquely injury-responsive despite being a meager minority in the adult skin. Summary: Dermal Prrx1-enhancer cells are injury-responsive fibroblasts. Prrx1enh+ cells readily migrate into the wound bed and amplify on average 16-fold beyond their uninjured numbers.
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Affiliation(s)
- Joshua D Currie
- CRTD-Center for Regenerative Therapies Dresden, Technische Universität Dresden, Fetscherstrasse 105, 01307 Dresden, Germany .,Department of Cell and Systems Biology, University of Toronto, 25 Harbord Street, M5S 3G5 Toronto, Canada
| | - Lidia Grosser
- CRTD-Center for Regenerative Therapies Dresden, Technische Universität Dresden, Fetscherstrasse 105, 01307 Dresden, Germany.,Research Institute for Molecular Pathology (IMP), Vienna Biocenter (VBC), Campus-Vienna-Biocenter 1, 1030 Vienna, Austria
| | - Prayag Murawala
- CRTD-Center for Regenerative Therapies Dresden, Technische Universität Dresden, Fetscherstrasse 105, 01307 Dresden, Germany.,Research Institute for Molecular Pathology (IMP), Vienna Biocenter (VBC), Campus-Vienna-Biocenter 1, 1030 Vienna, Austria
| | - Maritta Schuez
- CRTD-Center for Regenerative Therapies Dresden, Technische Universität Dresden, Fetscherstrasse 105, 01307 Dresden, Germany
| | - Martin Michel
- CRTD-Center for Regenerative Therapies Dresden, Technische Universität Dresden, Fetscherstrasse 105, 01307 Dresden, Germany
| | - Elly M Tanaka
- CRTD-Center for Regenerative Therapies Dresden, Technische Universität Dresden, Fetscherstrasse 105, 01307 Dresden, Germany.,Research Institute for Molecular Pathology (IMP), Vienna Biocenter (VBC), Campus-Vienna-Biocenter 1, 1030 Vienna, Austria
| | - Tatiana Sandoval-Guzmán
- CRTD-Center for Regenerative Therapies Dresden, Technische Universität Dresden, Fetscherstrasse 105, 01307 Dresden, Germany
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16
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Lleras-Forero L, Winkler C, Schulte-Merker S. Zebrafish and medaka as models for biomedical research of bone diseases. Dev Biol 2019; 457:191-205. [PMID: 31325453 DOI: 10.1016/j.ydbio.2019.07.009] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 07/13/2019] [Indexed: 12/17/2022]
Abstract
The identification of disease-causing mutations has in recent years progressed immensely due to whole genome sequencing approaches using patient material. The task accordingly is shifting from gene identification to functional analysis of putative disease-causing genes, preferably in an in vivo setting which also allows testing of drug candidates or biotherapeutics in whole animal disease models. In this review, we highlight the advances made in the field of bone diseases using small laboratory fish, focusing on zebrafish and medaka. We particularly highlight those human conditions where teleost models are available.
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Affiliation(s)
- L Lleras-Forero
- Institute for Cardiovascular Organogenesis and Regeneration, Faculty of Medicine, WWU Münster, Mendelstrasse 7, 48149 Münster, Germany; CiM Cluster of Excellence (EXC-1003-CiM), Münster, Germany.
| | - C Winkler
- Department of Biological Sciences and Centre for Bioimaging Sciences, National University of Singapore, 14 Science Drive 04, 117558 Singapore
| | - S Schulte-Merker
- Institute for Cardiovascular Organogenesis and Regeneration, Faculty of Medicine, WWU Münster, Mendelstrasse 7, 48149 Münster, Germany; CiM Cluster of Excellence (EXC-1003-CiM), Münster, Germany.
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17
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D'Agati G, Cabello EM, Frontzek K, Rushing EJ, Klemm R, Robinson MD, White RM, Mosimann C, Burger A. Active receptor tyrosine kinases, but not Brachyury, are sufficient to trigger chordoma in zebrafish. Dis Model Mech 2019; 12:dmm.039545. [PMID: 31221659 PMCID: PMC6679381 DOI: 10.1242/dmm.039545] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Accepted: 06/13/2019] [Indexed: 01/09/2023] Open
Abstract
The aberrant activation of developmental processes triggers diverse cancer types. Chordoma is a rare, aggressive tumor arising from transformed notochord remnants. Several potentially oncogenic factors have been found to be deregulated in chordoma, yet causation remains uncertain. In particular, sustained expression of TBXT – encoding the notochord regulator protein brachyury – is hypothesized as a key driver of chordoma, yet experimental evidence is absent. Here, we employ a zebrafish chordoma model to identify the notochord-transforming potential of implicated genes in vivo. We find that Brachyury, including a form with augmented transcriptional activity, is insufficient to initiate notochord hyperplasia. In contrast, the chordoma-implicated receptor tyrosine kinases (RTKs) EGFR and Kdr/VEGFR2 are sufficient to transform notochord cells. Aberrant activation of RTK/Ras signaling attenuates processes required for notochord differentiation, including the unfolded protein response and endoplasmic reticulum stress pathways. Our results provide the first in vivo evidence against a tumor-initiating potential of Brachyury in the notochord, and imply activated RTK signaling as a possible initiating event in chordoma. Furthermore, our work points at modulating endoplasmic reticulum and protein stress pathways as possible therapeutic avenues against chordoma. Summary: An injection-based chordoma model in zebrafish shows that the hypothesized chordoma oncogene brachyury is insufficient, whereas EGFR and VEGFR2 are sufficient, to trigger notochord hyperplasia in our model.
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Affiliation(s)
- Gianluca D'Agati
- Institute of Molecular Life Sciences, University of Zürich, 8057 Zürich, Switzerland
| | - Elena María Cabello
- Institute of Molecular Life Sciences, University of Zürich, 8057 Zürich, Switzerland
| | - Karl Frontzek
- Institute of Neuropathology, University Hospital Zürich, 8091 Zürich, Switzerland
| | - Elisabeth J Rushing
- Institute of Neuropathology, University Hospital Zürich, 8091 Zürich, Switzerland
| | - Robin Klemm
- Institute of Molecular Life Sciences, University of Zürich, 8057 Zürich, Switzerland
| | - Mark D Robinson
- Institute of Molecular Life Sciences, University of Zürich, 8057 Zürich, Switzerland.,SIB Swiss Institute of Bioinformatics, University of Zürich, 8057 Zürich, Switzerland
| | - Richard M White
- Cancer Biology & Genetics, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.,Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Christian Mosimann
- Institute of Molecular Life Sciences, University of Zürich, 8057 Zürich, Switzerland
| | - Alexa Burger
- Institute of Molecular Life Sciences, University of Zürich, 8057 Zürich, Switzerland
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18
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Norman J, Sorrell EL, Hu Y, Siripurapu V, Garcia J, Bagwell J, Charbonneau P, Lubkin SR, Bagnat M. Tissue self-organization underlies morphogenesis of the notochord. Philos Trans R Soc Lond B Biol Sci 2018; 373:rstb.2017.0320. [PMID: 30249771 DOI: 10.1098/rstb.2017.0320] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/03/2018] [Indexed: 12/13/2022] Open
Abstract
The notochord is a conserved axial structure that in vertebrates serves as a hydrostatic scaffold for embryonic axis elongation and, later on, for proper spine assembly. It consists of a core of large fluid-filled vacuolated cells surrounded by an epithelial sheath that is encased in extracellular matrix. During morphogenesis, the vacuolated cells inflate their vacuole and arrange in a stereotypical staircase pattern. We investigated the origin of this pattern and found that it can be achieved purely by simple physical principles. We are able to model the arrangement of vacuolated cells within the zebrafish notochord using a physical model composed of silicone tubes and water-absorbing polymer beads. The biological structure and the physical model can be accurately described by the theory developed for the packing of spheres and foams in cylinders. Our experiments with physical models and numerical simulations generated several predictions on key features of notochord organization that we documented and tested experimentally in zebrafish. Altogether, our data reveal that the organization of the vertebrate notochord is governed by the density of the osmotically swelling vacuolated cells and the aspect ratio of the notochord rod. We therefore conclude that self-organization underlies morphogenesis of the vertebrate notochord.This article is part of the Theo Murphy meeting issue on 'Mechanics of development'.
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Affiliation(s)
- James Norman
- Department of Cell Biology, Duke University, Durham, NC 27710, USA
| | - Emma L Sorrell
- Department of Cell Biology, Duke University, Durham, NC 27710, USA.,Department of Mathematics, North Carolina State University, Raleigh, NC 27695-8205, USA
| | - Yi Hu
- Department of Chemistry, Duke University, Durham, NC 27710, USA
| | - Vaishnavi Siripurapu
- Department of Cell Biology, Duke University, Durham, NC 27710, USA.,North Carolina School of Science and Mathematics, Durham, NC 27705, USA
| | - Jamie Garcia
- Department of Cell Biology, Duke University, Durham, NC 27710, USA
| | - Jennifer Bagwell
- Department of Cell Biology, Duke University, Durham, NC 27710, USA
| | | | - Sharon R Lubkin
- Department of Mathematics, North Carolina State University, Raleigh, NC 27695-8205, USA
| | - Michel Bagnat
- Department of Cell Biology, Duke University, Durham, NC 27710, USA
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19
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Zeng Z, Lopez-Baez JC, Lleras-Forero L, Brunsdon H, Wyatt C, Rybski W, Hastie ND, Schulte-Merker S, Patton EE. Notochord Injury Assays that Stimulate Transcriptional Responses in Zebrafish Larvae. Bio Protoc 2018; 8:e3100. [PMID: 30596125 DOI: 10.21769/bioprotoc.3100] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
Zebrafish have become an increasingly important model organism in the field of wound healing and regenerative medicine, due to their high regenerative capacity coupled with high-resolution imaging in living animals. In a recent study, we described multiple physical and chemical methods to induce notochord injury that led to highly specific transcriptional responses in notochord cellular subpopulations. The notochord is a critical embryonic structure that functions to shape and pattern the vertebrae and spinal column. Here, we describe precision needle injury, tail-notochord amputation, and chemical inhibition of caveolin that trigger a wound-specific wt1b expression response in the notochord sheath cell subpopulation. We propose that these procedures can be used to study distinct cell populations that make up the cellular processes of notochord repair.
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Affiliation(s)
- Zhiqiang Zeng
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road, Edinburgh, EH4 2XU, The United Kingdom.,CRUK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road, Edinburgh, EH4 2XU, The United Kingdom
| | - Juan C Lopez-Baez
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road, Edinburgh, EH4 2XU, The United Kingdom.,CRUK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road, Edinburgh, EH4 2XU, The United Kingdom
| | - Laura Lleras-Forero
- Hubrecht Institute - KNAW & UMC Utrecht, Utrecht, Netherlands.,Faculty of Medicine, Institute for Cardiovascular Organogenesis and Regeneration, WWU Münster, Münster, Germany.,CiM Cluster of Excellence, Münster, Germany
| | - Hannah Brunsdon
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road, Edinburgh, EH4 2XU, The United Kingdom.,CRUK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road, Edinburgh, EH4 2XU, The United Kingdom
| | - Cameron Wyatt
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road, Edinburgh, EH4 2XU, The United Kingdom
| | - Witold Rybski
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road, Edinburgh, EH4 2XU, The United Kingdom
| | - Nicholas D Hastie
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road, Edinburgh, EH4 2XU, The United Kingdom
| | - Stefan Schulte-Merker
- Hubrecht Institute - KNAW & UMC Utrecht, Utrecht, Netherlands.,Faculty of Medicine, Institute for Cardiovascular Organogenesis and Regeneration, WWU Münster, Münster, Germany.,CiM Cluster of Excellence, Münster, Germany
| | - E Elizabeth Patton
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road, Edinburgh, EH4 2XU, The United Kingdom.,CRUK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road, Edinburgh, EH4 2XU, The United Kingdom
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