1
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Dumoulin A, Wilson NH, Tucker KL, Stoeckli ET. A cell-autonomous role for primary cilium-mediated signaling in long-range commissural axon guidance. Development 2024; 151:dev202788. [PMID: 39157903 PMCID: PMC11423920 DOI: 10.1242/dev.202788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 08/08/2024] [Indexed: 08/20/2024]
Abstract
Ciliopathies are characterized by the absence or dysfunction of primary cilia. Despite the fact that cognitive impairments are a common feature of ciliopathies, how cilia dysfunction affects neuronal development has not been characterized in detail. Here, we show that primary cilium-mediated signaling is required cell-autonomously by neurons during neural circuit formation. In particular, a functional primary cilium is crucial during axonal pathfinding for the switch in responsiveness of axons at a choice point or intermediate target. Using different animal models and in vivo, ex vivo and in vitro experiments, we provide evidence for a crucial role of primary cilium-mediated signaling in long-range axon guidance. The primary cilium on the cell body of commissural neurons transduces long-range guidance signals sensed by growth cones navigating an intermediate target. In extension of our finding that Shh is required for the rostral turn of post-crossing commissural axons, we suggest a model implicating the primary cilium in Shh signaling upstream of a transcriptional change of axon guidance receptors, which in turn mediate the repulsive response to floorplate-derived Shh shown by post-crossing commissural axons.
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Affiliation(s)
- Alexandre Dumoulin
- Department of Molecular Life Sciences, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
- Neuroscience Center Zurich, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Nicole H Wilson
- Department of Molecular Life Sciences, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
- Neuroscience Center Zurich, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Kerry L Tucker
- University of New England, College of Osteopathic Medicine, Department of Biomedical Sciences, Center for Excellence in the Neurosciences, Biddeford, ME 04005, USA
| | - Esther T Stoeckli
- Department of Molecular Life Sciences, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
- Neuroscience Center Zurich, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
- University Research Priority Program 'Adaptive Brain Circuits in Development and Learning' (URPP AdaBD), University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
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2
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Ruhoff VT, Leijnse N, Doostmohammadi A, Bendix PM. Filopodia: integrating cellular functions with theoretical models. Trends Cell Biol 2024:S0962-8924(24)00113-2. [PMID: 38969554 DOI: 10.1016/j.tcb.2024.05.005] [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: 02/29/2024] [Revised: 05/24/2024] [Accepted: 05/27/2024] [Indexed: 07/07/2024]
Abstract
Filopodia, widely distributed on cell surfaces, are distinguished by their dynamic extensions, playing pivotal roles in a myriad of biological processes. Their functions span from mechanosensing and guidance to cell-cell communication during cellular organization in the early embryo. Filopodia have significant roles in pathogenic processes, such as cancer invasion and viral dissemination. Molecular mapping of the filopodome has revealed generic components essential for filopodia functions. In parallel, recent insights into biophysical mechanisms governing filopodia dynamics have provided the foundation for broader investigations of filopodia's biological functions. We highlight recent discoveries of engagement of filopodia in various stages of development and pathogenesis and present an overview of intricate molecular and physical features of these cellular structures across a spectrum of cellular activities.
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Affiliation(s)
| | - Natascha Leijnse
- Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100 København Ø, Denmark
| | - Amin Doostmohammadi
- Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100 København Ø, Denmark
| | - Poul Martin Bendix
- Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100 København Ø, Denmark.
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3
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Bernardi YE, Sanchez-Vasquez E, Márquez RB, Piacentino ML, Urrutia H, Rossi I, Alcântara Saraiva KL, Pereira-Neves A, Ramirez MI, Bronner ME, de Miguel N, Strobl-Mazzulla PH. miR-203 secreted in extracellular vesicles mediates the communication between neural crest and placode cells required for trigeminal ganglia formation. PLoS Biol 2024; 22:e3002074. [PMID: 39038054 PMCID: PMC11293684 DOI: 10.1371/journal.pbio.3002074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 08/01/2024] [Accepted: 06/17/2024] [Indexed: 07/24/2024] Open
Abstract
While interactions between neural crest and placode cells are critical for the proper formation of the trigeminal ganglion, the mechanisms underlying this process remain largely uncharacterized. Here, by using chick embryos, we show that the microRNA (miR)-203, whose epigenetic repression is required for neural crest migration, is reactivated in coalescing and condensing trigeminal ganglion cells. Overexpression of miR-203 induces ectopic coalescence of neural crest cells and increases ganglion size. By employing cell-specific electroporations for either miR-203 sponging or genomic editing using CRISPR/Cas9, we elucidated that neural crest cells serve as the source, while placode cells serve as the site of action for miR-203 in trigeminal ganglion condensation. Demonstrating intercellular communication, overexpression of miR-203 in the neural crest in vitro or in vivo represses an miR-responsive sensor in placode cells. Moreover, neural crest-secreted extracellular vesicles (EVs), visualized using pHluorin-CD63 vector, become incorporated into the cytoplasm of placode cells. Finally, RT-PCR analysis shows that small EVs isolated from condensing trigeminal ganglia are selectively loaded with miR-203. Together, our findings reveal a critical role in vivo for neural crest-placode communication mediated by sEVs and their selective microRNA cargo for proper trigeminal ganglion formation.
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Affiliation(s)
- Yanel E. Bernardi
- Laboratory of Developmental Biology, Instituto Tecnológico de Chascomús (INTECH), CONICET-UNSAM, Chascomús, Argentina
- Escuela de Bio y Nanotecnologías (UNSAM), Chascomús, Argentina
| | - Estefania Sanchez-Vasquez
- Laboratory of Developmental Biology, Instituto Tecnológico de Chascomús (INTECH), CONICET-UNSAM, Chascomús, Argentina
- Escuela de Bio y Nanotecnologías (UNSAM), Chascomús, Argentina
| | - Rocío Belén Márquez
- Laboratory of Developmental Biology, Instituto Tecnológico de Chascomús (INTECH), CONICET-UNSAM, Chascomús, Argentina
- Escuela de Bio y Nanotecnologías (UNSAM), Chascomús, Argentina
| | - Michael L. Piacentino
- Division of Biology, California Institute of Technology, Pasadena, California, United States of America
| | - Hugo Urrutia
- Division of Biology, California Institute of Technology, Pasadena, California, United States of America
| | - Izadora Rossi
- Laboratorio de biologia molecular e sistematica de tripanossomatideos, Instituto Carlos Chagas, Fiocruz Parana, Curitiba, Brazil
| | | | | | - Marcel I. Ramirez
- Laboratorio de biologia molecular e sistematica de tripanossomatideos, Instituto Carlos Chagas, Fiocruz Parana, Curitiba, Brazil
| | - Marianne E. Bronner
- Division of Biology, California Institute of Technology, Pasadena, California, United States of America
| | - Natalia de Miguel
- Escuela de Bio y Nanotecnologías (UNSAM), Chascomús, Argentina
- Laboratorio de Parásitos Anaerobios, Instituto Tecnológico Chascomús (INTECH), CONICET-UNSAM, Chascomús, Argentina
| | - Pablo H. Strobl-Mazzulla
- Laboratory of Developmental Biology, Instituto Tecnológico de Chascomús (INTECH), CONICET-UNSAM, Chascomús, Argentina
- Escuela de Bio y Nanotecnologías (UNSAM), Chascomús, Argentina
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4
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Jiménez-Jiménez C, Grobe K, Guerrero I. Hedgehog on the Move: Glypican-Regulated Transport and Gradient Formation in Drosophila. Cells 2024; 13:418. [PMID: 38474382 DOI: 10.3390/cells13050418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 02/21/2024] [Accepted: 02/22/2024] [Indexed: 03/14/2024] Open
Abstract
Glypicans (Glps) are a family of heparan sulphate proteoglycans that are attached to the outer plasma membrane leaflet of the producing cell by a glycosylphosphatidylinositol anchor. Glps are involved in the regulation of many signalling pathways, including those that regulate the activities of Wnts, Hedgehog (Hh), Fibroblast Growth Factors (FGFs), and Bone Morphogenetic Proteins (BMPs), among others. In the Hh-signalling pathway, Glps have been shown to be essential for ligand transport and the formation of Hh gradients over long distances, for the maintenance of Hh levels in the extracellular matrix, and for unimpaired ligand reception in distant recipient cells. Recently, two mechanistic models have been proposed to explain how Hh can form the signalling gradient and how Glps may contribute to it. In this review, we describe the structure, biochemistry, and metabolism of Glps and their interactions with different components of the Hh-signalling pathway that are important for the release, transport, and reception of Hh.
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Affiliation(s)
- Carlos Jiménez-Jiménez
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Universidad Autónoma de Madrid, Nicolás Cabrera 1, E-28049 Madrid, Spain
| | - Kay Grobe
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, Waldeyerstrasse 15, 48149 Münster, Germany
| | - Isabel Guerrero
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Universidad Autónoma de Madrid, Nicolás Cabrera 1, E-28049 Madrid, Spain
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5
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Zhang C, Brunt L, Ono Y, Rogers S, Scholpp S. Cytoneme-mediated transport of active Wnt5b-Ror2 complexes in zebrafish. Nature 2024; 625:126-133. [PMID: 38123680 PMCID: PMC10764289 DOI: 10.1038/s41586-023-06850-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 11/08/2023] [Indexed: 12/23/2023]
Abstract
Chemical signalling is the primary means by which cells communicate in the embryo. The underlying principle refers to a group of ligand-producing cells and a group of cells that respond to this signal because they express the appropriate receptors1,2. In the zebrafish embryo, Wnt5b binds to the receptor Ror2 to trigger the Wnt-planar cell polarity (PCP) signalling pathway to regulate tissue polarity and cell migration3,4. However, it remains unclear how this lipophilic ligand is transported from the source cells through the aqueous extracellular space to the target tissue. In this study, we provide evidence that Wnt5b, together with Ror2, is loaded on long protrusions called cytonemes. Our data further suggest that the active Wnt5b-Ror2 complexes form in the producing cell and are handed over from these cytonemes to the receiving cell. Then, the receiving cell has the capacity to initiate Wnt-PCP signalling, irrespective of its functional Ror2 receptor status. On the tissue level, we further show that cytoneme-dependent spreading of active Wnt5b-Ror2 affects convergence and extension in the zebrafish gastrula. We suggest that cytoneme-mediated transfer of ligand-receptor complexes is a vital mechanism for paracrine signalling. This may prompt a reevaluation of the conventional concept of characterizing responsive and non-responsive tissues solely on the basis of the expression of receptors.
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Affiliation(s)
- Chengting Zhang
- Living Systems Institute, School of Biosciences, Faculty of Health and Life Sciences, University of Exeter, Exeter, UK
| | - Lucy Brunt
- Living Systems Institute, School of Biosciences, Faculty of Health and Life Sciences, University of Exeter, Exeter, UK
| | - Yosuke Ono
- Living Systems Institute, School of Biosciences, Faculty of Health and Life Sciences, University of Exeter, Exeter, UK
| | - Sally Rogers
- Living Systems Institute, School of Biosciences, Faculty of Health and Life Sciences, University of Exeter, Exeter, UK
| | - Steffen Scholpp
- Living Systems Institute, School of Biosciences, Faculty of Health and Life Sciences, University of Exeter, Exeter, UK.
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6
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Deshpande G, Ng C, Jourjine N, Chiew JW, Dasilva J, Schedl P. Hedgehog signaling guides migration of primordial germ cells to the Drosophila somatic gonad. Genetics 2023; 225:iyad165. [PMID: 37708366 PMCID: PMC10627259 DOI: 10.1093/genetics/iyad165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 08/18/2023] [Accepted: 08/21/2023] [Indexed: 09/16/2023] Open
Abstract
In addition to inducing nonautonomous specification of cell fate in both Drosophila and vertebrates, the Hedgehog pathway guides cell migration in a variety of different tissues. Although its role in axon guidance in the vertebrate nervous system is widely recognized, its role in guiding the migratory path of primordial germ cells (PGCs) from the outside surface of the Drosophila embryo through the midgut and mesoderm to the SGPs (somatic gonadal precursors) has been controversial. Here we present new experiments demonstrating (1) that Hh produced by mesodermal cells guides PGC migration, (2) that HMG CoenzymeA reductase (Hmgcr) potentiates guidance signals emanating from the SGPs, functioning upstream of hh and of 2 Hh pathway genes important for Hh-containing cytonemes, and (3) that factors required in Hh receiving cells in other contexts function in PGCs to help direct migration toward the SGPs. We also compare the data reported by 4 different laboratories that have studied the role of the Hh pathway in guiding PGC migration.
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Affiliation(s)
- Girish Deshpande
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - Chris Ng
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - Nicholas Jourjine
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - Joy Wan Chiew
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - Juliana Dasilva
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - Paul Schedl
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
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7
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Oikawa I, Kondo S, Hashimoto K, Yoshida A, Hamajima M, Tanimoto H, Furukubo-Tokunaga K, Honjo K. A descending inhibitory mechanism of nociception mediated by an evolutionarily conserved neuropeptide system in Drosophila. eLife 2023; 12:RP85760. [PMID: 37310871 DOI: 10.7554/elife.85760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023] Open
Abstract
Nociception is a neural process that animals have developed to avoid potentially tissue-damaging stimuli. While nociception is triggered in the peripheral nervous system, its modulation by the central nervous system is a critical process in mammals, whose dysfunction has been extensively implicated in chronic pain pathogenesis. The peripheral mechanisms of nociception are largely conserved across the animal kingdom. However, it is unclear whether the brain-mediated modulation is also conserved in non-mammalian species. Here, we show that Drosophila has a descending inhibitory mechanism of nociception from the brain, mediated by the neuropeptide Drosulfakinin (DSK), a homolog of cholecystokinin (CCK) that plays an important role in the descending control of nociception in mammals. We found that mutants lacking dsk or its receptors are hypersensitive to noxious heat. Through a combination of genetic, behavioral, histological, and Ca2+ imaging analyses, we subsequently revealed neurons involved in DSK-mediated nociceptive regulation at a single-cell resolution and identified a DSKergic descending neuronal pathway that inhibits nociception. This study provides the first evidence for a descending modulatory mechanism of nociception from the brain in a non-mammalian species that is mediated by the evolutionarily conserved CCK system, raising the possibility that the descending inhibition is an ancient mechanism to regulate nociception.
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Affiliation(s)
- Izumi Oikawa
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Shu Kondo
- Faculty of Advanced Engineering, Tokyo University of Science, Katsushika-ku, Tokyo, Japan
| | - Kao Hashimoto
- College of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Akiho Yoshida
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Megumi Hamajima
- Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Hiromu Tanimoto
- Graduate School of Life Sciences, Tohoku University, Sendai, Japan
| | | | - Ken Honjo
- Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
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8
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Pierini G, Dahmann C. Hedgehog morphogen gradient is robust towards variations in tissue morphology in Drosophila. Sci Rep 2023; 13:8454. [PMID: 37231029 DOI: 10.1038/s41598-023-34632-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 05/04/2023] [Indexed: 05/27/2023] Open
Abstract
During tissue development, gradients of secreted signaling molecules known as morphogens provide cells with positional information. The mechanisms underlying morphogen spreading have been widely studied, however, it remains largely unexplored whether the shape of morphogen gradients is influenced by tissue morphology. Here, we developed an analysis pipeline to quantify the distribution of proteins within a curved tissue. We applied it to the Hedgehog morphogen gradient in the Drosophila wing and eye-antennal imaginal discs, which are flat and curved tissues, respectively. Despite a different expression profile, the slope of the Hedgehog gradient was comparable between the two tissues. Moreover, inducing ectopic folds in wing imaginal discs did not affect the slope of the Hedgehog gradient. Suppressing curvature in the eye-antennal imaginal disc also did not alter the Hedgehog gradient slope but led to ectopic Hedgehog expression. In conclusion, through the development of an analysis pipeline that allows quantifying protein distribution in curved tissues, we show that the Hedgehog gradient is robust towards variations in tissue morphology.
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Affiliation(s)
- Giulia Pierini
- School of Science, Technische Universität Dresden, 01062, Dresden, Germany
| | - Christian Dahmann
- School of Science, Technische Universität Dresden, 01062, Dresden, Germany.
- Cluster of Excellence Physics of Life, Technische Universität Dresden, 01062, Dresden, Germany.
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9
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Bauer M, Aguilar G, Wharton KA, Matsuda S, Affolter M. Heterodimerization-dependent secretion of bone morphogenetic proteins in Drosophila. Dev Cell 2023; 58:645-659.e4. [PMID: 37054707 PMCID: PMC10303954 DOI: 10.1016/j.devcel.2023.03.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 01/13/2023] [Accepted: 03/09/2023] [Indexed: 04/15/2023]
Abstract
Combinatorial signaling is key to instruct context-dependent cell behaviors. During embryonic development, adult homeostasis, and disease, bone morphogenetic proteins (BMPs) act as dimers to instruct specific cellular responses. BMP ligands can form both homodimers or heterodimers; however, obtaining direct evidence of the endogenous localization and function of each form has proven challenging. Here, we make use of precise genome editing and direct protein manipulation via protein binders to dissect the existence and functional relevance of BMP homodimers and heterodimers in the Drosophila wing imaginal disc. This approach identified in situ the existence of Dpp (BMP2/4)/Gbb (BMP5/6/7/8) heterodimers. We found that Gbb is secreted in a Dpp-dependent manner in the wing imaginal disc. Dpp and Gbb form a gradient of heterodimers, whereas neither Dpp nor Gbb homodimers are evident under endogenous physiological conditions. We find that the formation of heterodimers is critical for obtaining optimal signaling and long-range BMP distribution.
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Affiliation(s)
- Milena Bauer
- Biozentrum, University of Basel, Spitalstrasse 41, 4056 Basel, Switzerland
| | - Gustavo Aguilar
- Biozentrum, University of Basel, Spitalstrasse 41, 4056 Basel, Switzerland
| | | | - Shinya Matsuda
- Biozentrum, University of Basel, Spitalstrasse 41, 4056 Basel, Switzerland.
| | - Markus Affolter
- Biozentrum, University of Basel, Spitalstrasse 41, 4056 Basel, Switzerland.
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10
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Bernardi YE, Sanchez-Vasquez E, Piacentino ML, Urrutia H, Rossi I, Saraiva KLA, Pereira-Neves A, Ramirez MI, Bronner ME, de Miguel N, Strobl-Mazzulla PH. Extracellular vesicle-localized miR-203 mediates neural crest-placode communication required for trigeminal ganglia formation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.14.532527. [PMID: 36993487 PMCID: PMC10055076 DOI: 10.1101/2023.03.14.532527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
While interactions between neural crest and placode cells are critical for the proper formation of the trigeminal ganglion, the mechanisms underlying this process remain largely uncharacterized. Here, we show that the microRNA-(miR)203, whose epigenetic repression is required for neural crest migration, is reactivated in coalescing and condensing trigeminal ganglion cells. Overexpression of miR-203 induces ectopic coalescence of neural crest cells and increases ganglion size. Reciprocally, loss of miR-203 function in placode, but not neural crest, cells perturbs trigeminal ganglion condensation. Demonstrating intercellular communication, overexpression of miR-203 in the neural crest in vitro or in vivo represses a miR-responsive sensor in placode cells. Moreover, neural crest-secreted extracellular vesicles (EVs), visualized using pHluorin-CD63 vector, become incorporated into the cytoplasm of placode cells. Finally, RT-PCR analysis shows that small EVs isolated from condensing trigeminal ganglia are selectively loaded with miR-203. Together, our findings reveal a critical role in vivo for neural crest-placode communication mediated by sEVs and their selective microRNA cargo for proper trigeminal ganglion formation.
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Affiliation(s)
- Yanel E Bernardi
- Laboratory of Developmental Biology. Instituto Tecnológico de Chascomús (INTECH), CONICET-UNSAM. Chascomús, ARGENTINA
- Escuela de Bio y Nanotecnologías (UNSAM). Chascomús, ARGENTINA
| | - Estefania Sanchez-Vasquez
- Laboratory of Developmental Biology. Instituto Tecnológico de Chascomús (INTECH), CONICET-UNSAM. Chascomús, ARGENTINA
- Escuela de Bio y Nanotecnologías (UNSAM). Chascomús, ARGENTINA
| | | | - Hugo Urrutia
- Division of Biology, California Institute of Technology, Pasadena, CA, USA
| | - Izadora Rossi
- Laboratorio de biologia molecular e sistematica de tripanossomatideos. Instituto Carlos Chagas, Fiocruz Parana, BRAZIL
| | | | - Antonio Pereira-Neves
- Departamento de Microbiologia, Instituto Aggeu Magalhães, Fiocruz, Recife, Pernambuco, BRAZIL
| | - Marcel Ivan Ramirez
- Laboratorio de biologia molecular e sistematica de tripanossomatideos. Instituto Carlos Chagas, Fiocruz Parana, BRAZIL
| | | | - Natalia de Miguel
- Escuela de Bio y Nanotecnologías (UNSAM). Chascomús, ARGENTINA
- Laboratorio de Parásitos Anaerobios, Instituto Tecnológico Chascomús (INTECH), CONICET-UNSAM, Chascomús, ARGENTINA
| | - Pablo H. Strobl-Mazzulla
- Laboratory of Developmental Biology. Instituto Tecnológico de Chascomús (INTECH), CONICET-UNSAM. Chascomús, ARGENTINA
- Escuela de Bio y Nanotecnologías (UNSAM). Chascomús, ARGENTINA
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11
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Douceau S, Deutsch Guerrero T, Ferent J. Establishing Hedgehog Gradients during Neural Development. Cells 2023; 12:225. [PMID: 36672161 PMCID: PMC9856818 DOI: 10.3390/cells12020225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/23/2022] [Accepted: 12/25/2022] [Indexed: 01/07/2023] Open
Abstract
A morphogen is a signaling molecule that induces specific cellular responses depending on its local concentration. The concept of morphogenic gradients has been a central paradigm of developmental biology for decades. Sonic Hedgehog (Shh) is one of the most important morphogens that displays pleiotropic functions during embryonic development, ranging from neuronal patterning to axon guidance. It is commonly accepted that Shh is distributed in a gradient in several tissues from different origins during development; however, how these gradients are formed and maintained at the cellular and molecular levels is still the center of a great deal of research. In this review, we first explored all of the different sources of Shh during the development of the nervous system. Then, we detailed how these sources can distribute Shh in the surrounding tissues via a variety of mechanisms. Finally, we addressed how disrupting Shh distribution and gradients can induce severe neurodevelopmental disorders and cancers. Although the concept of gradient has been central in the field of neurodevelopment since the fifties, we also describe how contemporary leading-edge techniques, such as organoids, can revisit this classical model.
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Affiliation(s)
- Sara Douceau
- INSERM UMR-S 1270, F-75005 Paris, France
- Institut du Fer à Moulin, INSERM, Sorbonne Univeristy, F-75005 Paris, France
| | - Tanya Deutsch Guerrero
- INSERM UMR-S 1270, F-75005 Paris, France
- Institut du Fer à Moulin, INSERM, Sorbonne Univeristy, F-75005 Paris, France
| | - Julien Ferent
- INSERM UMR-S 1270, F-75005 Paris, France
- Institut du Fer à Moulin, INSERM, Sorbonne Univeristy, F-75005 Paris, France
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12
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Jiang J. Hedgehog signaling mechanism and role in cancer. Semin Cancer Biol 2022; 85:107-122. [PMID: 33836254 PMCID: PMC8492792 DOI: 10.1016/j.semcancer.2021.04.003] [Citation(s) in RCA: 61] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 03/25/2021] [Accepted: 04/02/2021] [Indexed: 12/12/2022]
Abstract
Cell-cell communication through evolutionarily conserved signaling pathways governs embryonic development and adult tissue homeostasis. Deregulation of these signaling pathways has been implicated in a wide range of human diseases including cancer. One such pathway is the Hedgehog (Hh) pathway, which was originally discovered in Drosophila and later found to play a fundamental role in human development and diseases. Abnormal Hh pathway activation is a major driver of basal cell carcinomas (BCC) and medulloblastoma. Hh exerts it biological influence through a largely conserved signal transduction pathway from the activation of the GPCR family transmembrane protein Smoothened (Smo) to the conversion of latent Zn-finger transcription factors Gli/Ci proteins from their repressor (GliR/CiR) to activator (GliA/CiA) forms. Studies from model organisms and human patients have provided deep insight into the Hh signal transduction mechanisms, revealed roles of Hh signaling in a wide range of human cancers, and suggested multiple strategies for targeting this pathway in cancer treatment.
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Affiliation(s)
- Jin Jiang
- Department of Molecular Biology and Department of Pharmacology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, 75390, USA.
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13
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Predictive model for cytoneme guidance in Hedgehog signaling based on Ihog- Glypicans interaction. Nat Commun 2022; 13:5647. [PMID: 36163184 PMCID: PMC9512826 DOI: 10.1038/s41467-022-33262-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 09/09/2022] [Indexed: 11/28/2022] Open
Abstract
During embryonic development, cell-cell communication is crucial to coordinate cell behavior, especially in the generation of differentiation patterns via morphogen gradients. Morphogens are signaling molecules secreted by a source of cells that elicit concentration-dependent responses in target cells. For several morphogens, cell-cell contact via filopodia-like-structures (cytonemes) has been proposed as a mechanism for their gradient formation. Despite of the advances on cytoneme signaling, little is known about how cytonemes navigate through the extracellular matrix and how they orient to find their target. For the Hedgehog (Hh) signaling pathway in Drosophila, Hh co-receptor and adhesion protein Interference hedgehog (Ihog) and the glypicans Dally and Dally-like-protein (Dlp) interact affecting the cytoneme behavior. Here, we describe that differences in the cytoneme stabilization and orientation depend on the relative levels of Ihog and glypicans, suggesting a mechanism for cytoneme guidance. Furthermore, we have developed a mathematical model to study and corroborate this cytoneme guiding mechanism. Cytonemes are specialized filopodia-like structures known to be involved in signal transduction. Here they propose a new predictive model for cytoneme guidance in Hedgehog signaling, which is based on Ihog, Dally, and Dlp protein levels.
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14
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Gonçalves Antunes M, Sanial M, Contremoulins V, Carvalho S, Plessis A, Becam I. High hedgehog signaling is transduced by a multikinase-dependent switch controlling the apico-basal distribution of the GPCR smoothened. eLife 2022; 11:79843. [PMID: 36083801 PMCID: PMC9462849 DOI: 10.7554/elife.79843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 08/22/2022] [Indexed: 11/13/2022] Open
Abstract
The oncogenic G-protein-coupled receptor (GPCR) Smoothened (SMO) is a key transducer of the hedgehog (HH) morphogen, which plays an essential role in the patterning of epithelial structures. Here, we examine how HH controls SMO subcellular localization and activity in a polarized epithelium using the Drosophila wing imaginal disc as a model. We provide evidence that HH promotes the stabilization of SMO by switching its fate after endocytosis toward recycling. This effect involves the sequential and additive action of protein kinase A, casein kinase I, and the Fused (FU) kinase. Moreover, in the presence of very high levels of HH, the second effect of FU leads to the local enrichment of SMO in the most basal domain of the cell membrane. Together, these results link the morphogenetic effects of HH to the apico-basal distribution of SMO and provide a novel mechanism for the regulation of a GPCR.
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Affiliation(s)
| | | | | | | | - Anne Plessis
- Université Paris Cité, CNRS, Institut Jacques Monod
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15
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Du L, Sohr A, Li Y, Roy S. GPI-anchored FGF directs cytoneme-mediated bidirectional contacts to regulate its tissue-specific dispersion. Nat Commun 2022; 13:3482. [PMID: 35710780 PMCID: PMC9203819 DOI: 10.1038/s41467-022-30417-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 04/20/2022] [Indexed: 01/03/2023] Open
Abstract
How signaling proteins generate a multitude of information to organize tissue patterns is critical to understanding morphogenesis. In Drosophila, FGF produced in wing-disc cells regulates the development of the disc-associated air-sac-primordium (ASP). Here, we show that FGF is Glycosylphosphatidylinositol-anchored to the producing cell surface and that this modification both inhibits free FGF secretion and promotes target-specific cytoneme contacts and contact-dependent FGF release. FGF-source and ASP cells extend cytonemes that present FGF and FGFR on their surfaces and reciprocally recognize each other over distance by contacting through cell-adhesion-molecule (CAM)-like FGF-FGFR binding. Contact-mediated FGF-FGFR interactions induce bidirectional responses in ASP and source cells that, in turn, polarize FGF-sending and FGF-receiving cytonemes toward each other to reinforce signaling contacts. Subsequent un-anchoring of FGFR-bound-FGF from the source membrane dissociates cytoneme contacts and delivers FGF target-specifically to ASP cytonemes for paracrine functions. Thus, GPI-anchored FGF organizes both source and recipient cells and self-regulates its cytoneme-mediated tissue-specific dispersion. Cytonemes are signaling filopodia that mediate target-specific long-distance communications of signals like FGFs. Du et al. show that a Drosophila FGF is anchored to the FGF-producing cell surface, inhibiting free FGF secretion and activating contact-dependent bidirectional FGF-FGFR interactions, controlling target-specific cytoneme contacts and contact-dependent FGF release.
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Affiliation(s)
- Lijuan Du
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, 20742, USA
| | - Alex Sohr
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, 20742, USA.,Division of Cell and Gene Therapy, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, 20993, USA
| | - Yujia Li
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, 20742, USA
| | - Sougata Roy
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, 20742, USA.
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16
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Abstract
Hedgehog (Hh) proteins constitute one family of a small number of secreted signaling proteins that together regulate multiple aspects of animal development, tissue homeostasis and regeneration. Originally uncovered through genetic analyses in Drosophila, their subsequent discovery in vertebrates has provided a paradigm for the role of morphogens in positional specification. Most strikingly, the Sonic hedgehog protein was shown to mediate the activity of two classic embryonic organizing centers in vertebrates and subsequent studies have implicated it and its paralogs in a myriad of processes. Moreover, dysfunction of the signaling pathway has been shown to underlie numerous human congenital abnormalities and diseases, especially certain types of cancer. This review focusses on the genetic studies that uncovered the key components of the Hh signaling system and the subsequent, biochemical, cell and structural biology analyses of their functions. These studies have revealed several novel processes and principles, shedding new light on the cellular and molecular mechanisms underlying cell-cell communication. Notable amongst these are the involvement of cholesterol both in modifying the Hh proteins and in activating its transduction pathway, the role of cytonemes, filipodia-like extensions, in conveying Hh signals between cells; and the central importance of the Primary Cilium as a cellular compartment within which the components of the signaling pathway are sequestered and interact.
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Affiliation(s)
- Philip William Ingham
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore.
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17
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Chang M, Lee OC, Bu G, Oh J, Yunn NO, Ryu SH, Kwon HB, Kolomeisky AB, Shim SH, Doh J, Jeon JH, Lee JB. Formation of cellular close-ended tunneling nanotubes through mechanical deformation. SCIENCE ADVANCES 2022; 8:eabj3995. [PMID: 35353579 PMCID: PMC8967236 DOI: 10.1126/sciadv.abj3995] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Membrane nanotubes or tunneling nanotubes (TNTs) that connect cells have been recognized as a previously unidentified pathway for intercellular transport between distant cells. However, it is unknown how this delicate structure, which extends over tens of micrometers and remains robust for hours, is formed. Here, we found that a TNT develops from a double filopodial bridge (DFB) created by the physical contact of two filopodia through helical deformation of the DFB. The transition of a DFB to a close-ended TNT is most likely triggered by disruption of the adhesion of two filopodia by mechanical energy accumulated in a twisted DFB when one of the DFB ends is firmly attached through intercellular cadherin-cadherin interactions. These studies pinpoint the mechanistic questions about TNTs and elucidate a formation mechanism.
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Affiliation(s)
- Minhyeok Chang
- Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - O-chul Lee
- Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Gayun Bu
- Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Jaeho Oh
- Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Na-Oh Yunn
- POSTECH Biotech Center, Pohang 37673, Korea
| | - Sung Ho Ryu
- Department of Life Sciences, POSTECH, Pohang 37673, Korea
| | - Hyung-Bae Kwon
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | | | - Sang-Hee Shim
- Department of Chemistry, Korea University, Seoul 02481, Korea
| | - Junsang Doh
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
| | - Jae-Hyung Jeon
- Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
- Asia Pacific Center for Theoretical Physics (APCTP), Pohang 37673, Korea
- Corresponding author. (J.-B.L.); (J.-H.J.)
| | - Jong-Bong Lee
- Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
- Asia Pacific Center for Theoretical Physics (APCTP), Pohang 37673, Korea
- School of Interdisciplinary Bioscience and Bioengineering, POSTECH, Pohang 37673, Korea
- Corresponding author. (J.-B.L.); (J.-H.J.)
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18
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Abstract
The Wnt pathway is central to a host of developmental and disease-related processes. The remarkable conservation of this intercellular signaling cascade throughout metazoan lineages indicates that it coevolved with multicellularity to regulate the generation and spatial arrangement of distinct cell types. By regulating cell fate specification, mitotic activity, and cell polarity, Wnt signaling orchestrates development and tissue homeostasis, and its dysregulation is implicated in developmental defects, cancer, and degenerative disorders. We review advances in our understanding of this key pathway, from Wnt protein production and secretion to relay of the signal in the cytoplasm of the receiving cell. We discuss the evolutionary history of this pathway as well as endogenous and synthetic modulators of its activity. Finally, we highlight remaining gaps in our knowledge of Wnt signal transduction and avenues for future research. Expected final online publication date for the Annual Review of Biochemistry, Volume 91 is June 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Ellen Youngsoo Rim
- Howard Hughes Medical Institute, Department of Developmental Biology, and Institute for Stem Cell Biology and Regenerative Medicine, School of Medicine, Stanford University, Stanford, California, USA;
| | - Hans Clevers
- Hubrecht Institute and Oncode Institute, Royal Netherlands Academy of Arts and Sciences (KNAW), Utrecht, The Netherlands
| | - Roel Nusse
- Howard Hughes Medical Institute, Department of Developmental Biology, and Institute for Stem Cell Biology and Regenerative Medicine, School of Medicine, Stanford University, Stanford, California, USA;
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19
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Daly CA, Hall ET, Ogden SK. Regulatory mechanisms of cytoneme-based morphogen transport. Cell Mol Life Sci 2022; 79:119. [PMID: 35119540 PMCID: PMC8816744 DOI: 10.1007/s00018-022-04148-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 01/05/2022] [Accepted: 01/12/2022] [Indexed: 01/07/2023]
Abstract
During development and tissue homeostasis, cells must communicate with their neighbors to ensure coordinated responses to instructional cues. Cues such as morphogens and growth factors signal at both short and long ranges in temporal- and tissue-specific manners to guide cell fate determination, provide positional information, and to activate growth and survival responses. The precise mechanisms by which such signals traverse the extracellular environment to ensure reliable delivery to their intended cellular targets are not yet clear. One model for how this occurs suggests that specialized filopodia called cytonemes extend between signal-producing and -receiving cells to function as membrane-bound highways along which information flows. A growing body of evidence supports a crucial role for cytonemes in cell-to-cell communication. Despite this, the molecular mechanisms by which cytonemes are initiated, how they grow, and how they deliver specific signals are only starting to be revealed. Herein, we discuss recent advances toward improved understanding of cytoneme biology. We discuss similarities and differences between cytonemes and other types of cellular extensions, summarize what is known about how they originate, and discuss molecular mechanisms by which their activity may be controlled in development and tissue homeostasis. We conclude by highlighting important open questions regarding cytoneme biology, and comment on how a clear understanding of their function may provide opportunities for treating or preventing disease.
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Affiliation(s)
- Christina A Daly
- Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Pl. MS340, Memphis, TN, 38105, USA
- St. Jude Graduate School of Biomedical Sciences, St. Jude Children's Research Hospital, 262 Danny Thomas Pl, MS 1500, Memphis, TN, 38105, USA
| | - Eric T Hall
- Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Pl. MS340, Memphis, TN, 38105, USA
| | - Stacey K Ogden
- Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Pl. MS340, Memphis, TN, 38105, USA.
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20
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Waghmare I, Page-McCaw A. Regulation of Wnt distribution and function by Drosophila glypicans. J Cell Sci 2022; 135:274233. [PMID: 35112708 PMCID: PMC8918805 DOI: 10.1242/jcs.259405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The extracellular distribution of secreted Wnt proteins is crucial for their ability to induce a response in target cells at short and long ranges to ensure proper development. Wnt proteins are evolutionarily conserved ligands that are lipid-modified, and their hydrophobic nature interferes with their solubility in the hydrophilic extracellular environment. This raises the question of how Wnt proteins spread extracellularly despite their lipid modifications, which are essential for both their secretion and function. Seminal studies on Drosophila Wingless (Wg), a prototypical Wnt, have discovered multiple mechanisms by which Wnt proteins spread. A central theme emerges from these studies: the Wnt lipid moiety is shielded from the aqueous environment, allowing the ligands to spread and remain viable for signaling. Wnt distribution in vivo is primarily facilitated by glypicans, which are cell-surface heparan sulfate proteoglycans, and recent studies have further provided mechanistic insight into how glypicans facilitate Wnt distribution. In this Review, we discuss the many diverse mechanisms of Wnt distribution, with a particular focus on glypican-mediated mechanisms.
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21
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Gradilla AC, Guerrero I. Hedgehog on track: Long-distant signal transport and transfer through direct cell-to-cell contact. Curr Top Dev Biol 2022; 150:1-24. [DOI: 10.1016/bs.ctdb.2022.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Hadjivasiliou Z, Hunter G. Talking to your neighbors across scales: Long-distance Notch signaling during patterning. Curr Top Dev Biol 2022; 150:299-334. [DOI: 10.1016/bs.ctdb.2022.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Routledge D, Rogers S, Ono Y, Brunt L, Meniel V, Tornillo G, Ashktorab H, Phesse TJ, Scholpp S. The scaffolding protein flot2 promotes cytoneme-based transport of wnt3 in gastric cancer. eLife 2022; 11:77376. [PMID: 36040316 PMCID: PMC9457691 DOI: 10.7554/elife.77376] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 08/27/2022] [Indexed: 11/16/2022] Open
Abstract
The Wnt/β-catenin signalling pathway regulates multiple cellular processes during development and many diseases, including cell proliferation, migration, and differentiation. Despite their hydrophobic nature, Wnt proteins exert their function over long distances to induce paracrine signalling. Recent studies have identified several factors involved in Wnt secretion; however, our understanding of how Wnt ligands are transported between cells to interact with their cognate receptors is still debated. Here, we demonstrate that gastric cancer cells utilise cytonemes to transport Wnt3 intercellularly to promote proliferation and cell survival. Furthermore, we identify the membrane-bound scaffolding protein Flotillin-2 (Flot2), frequently overexpressed in gastric cancer, as a modulator of these cytonemes. Together with the Wnt co-receptor and cytoneme initiator Ror2, Flot2 determines the number and length of Wnt3 cytonemes in gastric cancer. Finally, we show that Flotillins are also necessary for Wnt8a cytonemes during zebrafish embryogenesis, suggesting a conserved mechanism for Flotillin-mediated Wnt transport on cytonemes in development and disease.
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Affiliation(s)
- Daniel Routledge
- Living Systems Institute, School of Biosciences, College of Life and Environmental Sciences, University of ExeterExeterUnited Kingdom
| | - Sally Rogers
- Living Systems Institute, School of Biosciences, College of Life and Environmental Sciences, University of ExeterExeterUnited Kingdom
| | - Yosuke Ono
- Living Systems Institute, School of Biosciences, College of Life and Environmental Sciences, University of ExeterExeterUnited Kingdom
| | - Lucy Brunt
- Living Systems Institute, School of Biosciences, College of Life and Environmental Sciences, University of ExeterExeterUnited Kingdom
| | - Valerie Meniel
- The European Cancer Stem Cell Research Institute, School of Biosciences, Cardiff UniversityCardiffUnited Kingdom
| | - Giusy Tornillo
- The European Cancer Stem Cell Research Institute, School of Biosciences, Cardiff UniversityCardiffUnited Kingdom
| | - Hassan Ashktorab
- Department of Medicine, Howard UniversityWashingtonUnited States
| | - Toby J Phesse
- The European Cancer Stem Cell Research Institute, School of Biosciences, Cardiff UniversityCardiffUnited Kingdom,The Peter Doherty Institute for Infection and Immunity, The University of MelbourneMelbourneAustralia
| | - Steffen Scholpp
- Living Systems Institute, School of Biosciences, College of Life and Environmental Sciences, University of ExeterExeterUnited Kingdom
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24
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Hu B, Rodriguez JJ, Kakkerla Balaraju A, Gao Y, Nguyen NT, Steen H, Suhaib S, Chen S, Lin F. Glypican 4 mediates Wnt transport between germ layers via signaling filopodia. J Cell Biol 2021; 220:212673. [PMID: 34591076 PMCID: PMC8488972 DOI: 10.1083/jcb.202009082] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 07/18/2021] [Accepted: 09/08/2021] [Indexed: 12/31/2022] Open
Abstract
Glypicans influence signaling pathways by regulating morphogen trafficking and reception. However, the underlying mechanisms in vertebrates are poorly understood. In zebrafish, Glypican 4 (Gpc4) is required for convergence and extension (C&E) of both the mesoderm and endoderm. Here, we show that transgenic expression of GFP-Gpc4 in the endoderm of gpc4 mutants rescued C&E defects in all germ layers. The rescue of mesoderm was likely mediated by Wnt5b and Wnt11f2 and depended on signaling filopodia rather than on cleavage of the Gpc4 GPI anchor. Gpc4 bound both Wnt5b and Wnt11f2 and regulated formation of the filopodia that transport Wnt5b and Wnt11f2 to neighboring cells. Moreover, this rescue was suppressed by blocking signaling filopodia that extend from endodermal cells. Thus, GFP-Gpc4–labeled protrusions that emanated from endodermal cells transported Wnt5b and Wnt11f2 to other germ layers, rescuing the C&E defects caused by a gpc4 deficiency. Our study reveals a new mechanism that could explain in vivo morphogen distribution involving Gpc4.
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Affiliation(s)
- Bo Hu
- Department of Anatomy and Cell Biology, Carver College of Medicine, The University of Iowa, Iowa City, IA
| | - Juan J Rodriguez
- Department of Anatomy and Cell Biology, Carver College of Medicine, The University of Iowa, Iowa City, IA
| | - Anurag Kakkerla Balaraju
- Department of Anatomy and Cell Biology, Carver College of Medicine, The University of Iowa, Iowa City, IA
| | - Yuanyuan Gao
- Department of Anatomy and Cell Biology, Carver College of Medicine, The University of Iowa, Iowa City, IA
| | - Nhan T Nguyen
- Department of Anatomy and Cell Biology, Carver College of Medicine, The University of Iowa, Iowa City, IA
| | - Heston Steen
- Department of Anatomy and Cell Biology, Carver College of Medicine, The University of Iowa, Iowa City, IA
| | - Saeb Suhaib
- Department of Anatomy and Cell Biology, Carver College of Medicine, The University of Iowa, Iowa City, IA
| | - Songhai Chen
- Department of Neuroscience and Pharmacology, Carver College of Medicine, The University of Iowa, Iowa City, IA
| | - Fang Lin
- Department of Anatomy and Cell Biology, Carver College of Medicine, The University of Iowa, Iowa City, IA
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25
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Waghmare I, Page-McCaw A. Glypicans and cytonemes unite to distribute Wnt ligands. J Cell Biol 2021; 220:e202110033. [PMID: 34779856 PMCID: PMC8598080 DOI: 10.1083/jcb.202110033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Hu et al. (2021. J. Cell Biol.https://doi.org/10.1083/jcb.202009082) show that Glypican 4 participates in filopodia-mediated Wnt transport from endoderm to mesoderm in zebrafish embryos to facilitate intercellular communication between germ layers.
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Affiliation(s)
- Indrayani Waghmare
- Department of Cell and Developmental Biology, Program in Developmental Biology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN
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26
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Gross JC. Extracellular WNTs: Trafficking, Exosomes, and Ligand-Receptor Interaction. Handb Exp Pharmacol 2021; 269:29-43. [PMID: 34505202 DOI: 10.1007/164_2021_531] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
WNT signaling is a key developmental pathway in tissue organization. A recent focus of research is the secretion of WNT proteins from source cells. Research over the past decade on how WNTs are produced and released into the extracellular space has unravelled very specific control mechanisms in the early secretory pathway, specialized trafficking routes, and redundant forms of packaging for delivery to target cells. In this review I discuss the findings that WNT proteins have been found on extracellular vesicles (EVs) such as exosomes and possible functional implications. There is an ongoing debate in the WNT signaling field whether EV are relevant in vivo and can fulfill specific functions, also fueled by the general preconception of EV secretion as cellular garbage disposal. As part of the EV research community, I want to give an overview of what we know and don't know about WNT secretion on EVs and offer a more unifying model that can explain current discrepancies in observations regarding WNT secretion.
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Affiliation(s)
- Julia Christina Gross
- Developmental Biochemistry, University Medical Center Goettingen, Goettingen, Germany. .,Hematology and Oncology, University Medical Center Goettingen, Goettingen, Germany. .,Health and Medical University Potsdam, Potsdam, Germany.
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27
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Dispatching plasma membrane cholesterol and Sonic Hedgehog dispatch: two sides of the same coin? Biochem Soc Trans 2021; 49:2455-2463. [PMID: 34515747 PMCID: PMC8589413 DOI: 10.1042/bst20210918] [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: 07/08/2021] [Revised: 08/19/2021] [Accepted: 08/26/2021] [Indexed: 11/19/2022]
Abstract
Vertebrate and invertebrate Hedgehog (Hh) morphogens signal over short and long distances to direct cell fate decisions during development and to maintain tissue homeostasis after birth. One of the most important questions in Hh biology is how such Hh signaling to distant target cells is achieved, because all Hh proteins are secreted as dually lipidated proteins that firmly tether to the outer plasma membrane leaflet of their producing cells. There, Hhs multimerize into light microscopically visible storage platforms that recruit factors required for their regulated release. One such recruited release factor is the soluble glycoprotein Scube2 (Signal sequence, cubulin domain, epidermal-growth-factor-like protein 2), and maximal Scube2 function requires concomitant activity of the resistance-nodulation-division (RND) transporter Dispatched (Disp) at the plasma membrane of Hh-producing cells. Although recently published cryo-electron microscopy-derived structures suggest possible direct modes of Scube2/Disp-regulated Hh release, the mechanism of Disp-mediated Hh deployment is still not fully understood. In this review, we discuss suggested direct modes of Disp-dependent Hh deployment and relate them to the structural similarities between Disp and the related RND transporters Patched (Ptc) and Niemann-Pick type C protein 1. We then discuss open questions and perspectives that derive from these structural similarities, with particular focus on new findings that suggest shared small molecule transporter functions of Disp to deplete the plasma membrane of cholesterol and to modulate Hh release in an indirect manner.
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28
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Wood BM, Baena V, Huang H, Jorgens DM, Terasaki M, Kornberg TB. Cytonemes with complex geometries and composition extend into invaginations of target cells. J Cell Biol 2021; 220:211896. [PMID: 33734293 PMCID: PMC7980254 DOI: 10.1083/jcb.202101116] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 02/13/2021] [Accepted: 02/23/2021] [Indexed: 12/16/2022] Open
Abstract
Cytonemes are specialized filopodia that mediate paracrine signaling in Drosophila and other animals. Studies using fluorescence confocal microscopy (CM) established their general paths, cell targets, and essential roles in signaling. To investigate details unresolvable by CM, we used high-pressure freezing and EM to visualize cytoneme structures, paths, contents, and contacts. We observed cytonemes previously seen by CM in the Drosophila wing imaginal disc system, including disc, tracheal air sac primordium (ASP), and myoblast cytonemes, and identified cytonemes extending into invaginations of target cells, and cytonemes connecting ASP cells and connecting myoblasts. Diameters of cytoneme shafts vary between repeating wide (206 ± 51.8 nm) and thin (55.9 ± 16.2 nm) segments. Actin, ribosomes, and membranous compartments are present throughout; rough ER and mitochondria are in wider proximal sections. These results reveal novel structural features of filopodia and provide a basis for understanding cytoneme cell biology and function.
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Affiliation(s)
- Brent M Wood
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA
| | - Valentina Baena
- Department of Cell Biology, University of Connecticut Health Center, Farmington, CT
| | - Hai Huang
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA
| | - Danielle M Jorgens
- Electron Microscope Laboratory, University of California, Berkeley, Berkeley, CA
| | - Mark Terasaki
- Department of Cell Biology, University of Connecticut Health Center, Farmington, CT
| | - Thomas B Kornberg
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA
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29
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Simon E, Jiménez-Jiménez C, Seijo-Barandiarán I, Aguilar G, Sánchez-Hernández D, Aguirre-Tamaral A, González-Méndez L, Ripoll P, Guerrero I. Glypicans define unique roles for the Hedgehog co-receptors boi and ihog in cytoneme-mediated gradient formation. eLife 2021; 10:64581. [PMID: 34355694 PMCID: PMC8410076 DOI: 10.7554/elife.64581] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 08/04/2021] [Indexed: 02/06/2023] Open
Abstract
The conserved family of Hedgehog (Hh) signaling proteins plays a key role in cell–cell communication in development, tissue repair, and cancer progression, inducing distinct concentration-dependent responses in target cells located at short and long distances. One simple mechanism for long distance dispersal of the lipid modified Hh is the direct contact between cell membranes through filopodia-like structures known as cytonemes. Here we have analyzed in Drosophila the interaction between the glypicans Dally and Dally-like protein, necessary for Hh signaling, and the adhesion molecules and Hh coreceptors Ihog and Boi. We describe that glypicans are required to maintain the levels of Ihog, but not of Boi. We also show that the overexpression of Ihog, but not of Boi, regulates cytoneme dynamics through their interaction with glypicans, the Ihog fibronectin III domains being essential for this interaction. Our data suggest that the regulation of glypicans over Hh signaling is specifically given by their interaction with Ihog in cytonemes. Contrary to previous data, we also show that there is no redundancy of Ihog and Boi functions in Hh gradient formation, being Ihog, but not of Boi, essential for the long-range gradient.
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Affiliation(s)
- Eléanor Simon
- Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Nicolás Cabrera 1, Universidad Autónoma de Madrid, Cantoblanco, Spain
| | - Carlos Jiménez-Jiménez
- Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Nicolás Cabrera 1, Universidad Autónoma de Madrid, Cantoblanco, Spain
| | - Irene Seijo-Barandiarán
- Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Nicolás Cabrera 1, Universidad Autónoma de Madrid, Cantoblanco, Spain
| | - Gustavo Aguilar
- Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Nicolás Cabrera 1, Universidad Autónoma de Madrid, Cantoblanco, Spain.,Growth and Development, University of Basel, Biozentrum, Switzerland
| | - David Sánchez-Hernández
- Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Nicolás Cabrera 1, Universidad Autónoma de Madrid, Cantoblanco, Spain
| | - Adrián Aguirre-Tamaral
- Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Nicolás Cabrera 1, Universidad Autónoma de Madrid, Cantoblanco, Spain
| | - Laura González-Méndez
- Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Nicolás Cabrera 1, Universidad Autónoma de Madrid, Cantoblanco, Spain
| | - Pedro Ripoll
- Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Nicolás Cabrera 1, Universidad Autónoma de Madrid, Cantoblanco, Spain
| | - Isabel Guerrero
- Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Nicolás Cabrera 1, Universidad Autónoma de Madrid, Cantoblanco, Spain
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30
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Aguirre-Tamaral A, Guerrero I. Improving the understanding of cytoneme-mediated morphogen gradients by in silico modeling. PLoS Comput Biol 2021; 17:e1009245. [PMID: 34343167 PMCID: PMC8362982 DOI: 10.1371/journal.pcbi.1009245] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 08/13/2021] [Accepted: 07/03/2021] [Indexed: 01/23/2023] Open
Abstract
Morphogen gradients are crucial for the development of organisms. The biochemical properties of many morphogens prevent their extracellular free diffusion, indicating the need of an active mechanism for transport. The involvement of filopodial structures (cytonemes) has been proposed for morphogen signaling. Here, we describe an in silico model based on the main general features of cytoneme-meditated gradient formation and its implementation into Cytomorph, an open software tool. We have tested the spatial and temporal adaptability of our model quantifying Hedgehog (Hh) gradient formation in two Drosophila tissues. Cytomorph is able to reproduce the gradient and explain the different scaling between the two epithelia. After experimental validation, we studied the predicted impact of a range of features such as length, size, density, dynamics and contact behavior of cytonemes on Hh morphogen distribution. Our results illustrate Cytomorph as an adaptive tool to test different morphogen gradients and to generate hypotheses that are difficult to study experimentally. Graded distribution of signaling molecules (morphogens) is crucial for the development of organisms. Signaling membrane protrusions, called Cytonemes, have been experimentally demonstrated to be involved in morphogen transport and reception. Here, we have developed an in silico model for gradient formation based on key features of cytoneme mediated signaling. We have also implemented the model into an open software tool we named Cytomorph, and validated it by comparing its simulations with experimental data obtained from Hedgehog morphogen distribution. Finally, we have generated in silico predictions for the impact of different cytoneme features such as length, size, density, dynamics and contact behavior. Our results show that Cytomorph is an adaptive tool that can facilitate the study of other cytoneme-dependent morphogen gradients, besides being able to generate hypotheses about aspects that remain elusive to experimental approaches.
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Affiliation(s)
- Adrián Aguirre-Tamaral
- Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Universidad Autónoma de Madrid, Cantoblanco, Madrid, Spain
- * E-mail: (AA-T); (IG)
| | - Isabel Guerrero
- Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Universidad Autónoma de Madrid, Cantoblanco, Madrid, Spain
- * E-mail: (AA-T); (IG)
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31
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Hatori R, Wood BM, Oliveira Barbosa G, Kornberg TB. Regulated delivery controls Drosophila Hedgehog, Wingless, and Decapentaplegic signaling. eLife 2021; 10:71744. [PMID: 34292155 PMCID: PMC8376250 DOI: 10.7554/elife.71744] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 07/13/2021] [Indexed: 02/06/2023] Open
Abstract
Morphogen signaling proteins disperse across tissues to activate signal transduction in target cells. We investigated dispersion of Hedgehog (Hh), Wnt homolog Wingless (Wg), and Bone morphogenic protein homolog Decapentaplegic (Dpp) in the Drosophila wing imaginal disc. We discovered that delivery of Hh, Wg, and Dpp to their respective targets is regulated. We found that <5% of Hh and <25% of Wg are taken up by disc cells and activate signaling. The amount of morphogen that is taken up and initiates signaling did not change when the level of morphogen expression was varied between 50 and 200% (Hh) or 50 and 350% (Wg). Similar properties were observed for Dpp. We analyzed an area of 150 μm×150 μm that includes Hh-responding cells of the disc as well as overlying tracheal cells and myoblasts that are also activated by disc-produced Hh. We found that the extent of signaling in the disc was unaffected by the presence or absence of the tracheal and myoblast cells, suggesting that the mechanism that disperses Hh specifies its destinations to particular cells, and that target cells do not take up Hh from a common pool.
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Affiliation(s)
- Ryo Hatori
- Cardiovascular Research Institute University of California, San Francisco, San Francisco, United States
| | - Brent M Wood
- Cardiovascular Research Institute University of California, San Francisco, San Francisco, United States
| | | | - Thomas B Kornberg
- Cardiovascular Research Institute University of California, San Francisco, San Francisco, United States
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32
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Pizette S, Matusek T, Herpers B, Thérond PP, Rabouille C. Hherisomes, Hedgehog specialized recycling endosomes, are required for high level Hedgehog signaling and tissue growth. J Cell Sci 2021; 134:268340. [PMID: 34028543 DOI: 10.1242/jcs.258603] [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: 03/02/2021] [Accepted: 04/07/2021] [Indexed: 01/03/2023] Open
Abstract
In metazoans, tissue growth and patterning is partly controlled by the Hedgehog (Hh) morphogen. Using immuno-electron microscopy on Drosophila wing imaginal discs, we identified a cellular structure, the Hherisomes, which contain the majority of intracellular Hh. Hherisomes are recycling tubular endosomes, and their formation is specifically boosted by overexpression of Hh. Expression of Rab11, a small GTPase involved in recycling endosomes, boosts the size of Hherisomes and their Hh concentration. Conversely, increased expression of the transporter Dispatched, a regulator of Hh secretion, leads to their clearance. We show that increasing Hh density in Hherisomes through Rab11 overexpression enhances both the level of Hh signaling and disc pouch growth, whereas Dispatched overexpression decreases high-level Hh signaling and growth. We propose that, upon secretion, a pool of Hh triggers low-level signaling, whereas a second pool of Hh is endocytosed and recycled through Hherisomes to stimulate high-level signaling and disc pouch growth. Altogether, our data indicate that Hherisomes are required to sustain physiological Hh activity necessary for patterning and tissue growth in the wing disc.
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Affiliation(s)
- Sandrine Pizette
- Université Côte d'Azur, Centre National de la Recherche Scientifique (CNRS), Inserm, Institute of Biology-Valrose (iBV), 06108 Nice Cedex 2, France
| | - Tamás Matusek
- Université Côte d'Azur, Centre National de la Recherche Scientifique (CNRS), Inserm, Institute of Biology-Valrose (iBV), 06108 Nice Cedex 2, France
| | - Bram Herpers
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands
| | - Pascal P Thérond
- Université Côte d'Azur, Centre National de la Recherche Scientifique (CNRS), Inserm, Institute of Biology-Valrose (iBV), 06108 Nice Cedex 2, France
| | - Catherine Rabouille
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands.,Hubrecht Institute/KNAW [Koninklijke Nederlandsee Akademie van Wetenschap (Dutch Royal Academy of Sciences)] and UMC Utrecht, 3584 CT Utrecht, The Netherlands.,Biological Sciences of Cells and Systems (BSBC) Department, UMC Groningen, 9713 AV Groningen, The Netherlands
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33
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Yang S, Zhang Y, Yang C, Wu X, El Oud SM, Chen R, Cai X, Wu XS, Lan G, Zheng X. Competitive coordination of the dual roles of the Hedgehog co-receptor in homophilic adhesion and signal reception. eLife 2021; 10:65770. [PMID: 34003115 PMCID: PMC8131103 DOI: 10.7554/elife.65770] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/30/2021] [Indexed: 12/18/2022] Open
Abstract
Hedgehog (Hh) signaling patterns embryonic tissues and contributes to homeostasis in adults. In Drosophila, Hh transport and signaling are thought to occur along a specialized class of actin-rich filopodia, termed cytonemes. Here, we report that Interference hedgehog (Ihog) not only forms a Hh receptor complex with Patched to mediate intracellular signaling, but Ihog also engages in trans-homophilic binding leading to cytoneme stabilization in a manner independent of its role as the Hh receptor. Both functions of Ihog (trans-homophilic binding for cytoneme stabilization and Hh binding for ligand sensing) involve a heparin-binding site on the first fibronectin repeat of the extracellular domain. Thus, the Ihog-Ihog interaction and the Hh-Ihog interaction cannot occur simultaneously for a single Ihog molecule. By combining experimental data and mathematical modeling, we determined that Hh-Ihog heterophilic interaction dominates and Hh can disrupt and displace Ihog molecules involved in trans-homophilic binding. Consequently, we proposed that the weaker Ihog-Ihog trans interaction promotes and stabilizes direct membrane contacts along cytonemes and that, as the cytoneme encounters secreted Hh ligands, the ligands trigger release of Ihog from trans Ihog-Ihog complex enabling transport or internalization of the Hh ligand-Ihog-Patched -receptor complex. Thus, the seemingly incompatible functions of Ihog in homophilic adhesion and ligand binding cooperate to assist Hh transport and reception along the cytonemes.
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Affiliation(s)
- Shu Yang
- Department of Anatomy and Cell Biology, George Washington University School of Medicine and Health Sciences, Washington, United States.,GW Cancer Center, George Washington University School of Medicine and Health Sciences, Washington, United States
| | - Ya Zhang
- Department of Anatomy and Cell Biology, George Washington University School of Medicine and Health Sciences, Washington, United States.,GW Cancer Center, George Washington University School of Medicine and Health Sciences, Washington, United States
| | - Chuxuan Yang
- Department of Physics, George Washington University, Washington, United States
| | - Xuefeng Wu
- Department of Anatomy and Cell Biology, George Washington University School of Medicine and Health Sciences, Washington, United States.,GW Cancer Center, George Washington University School of Medicine and Health Sciences, Washington, United States
| | - Sarah Maria El Oud
- Department of Physics, George Washington University, Washington, United States
| | - Rongfang Chen
- Department of Anatomy and Cell Biology, George Washington University School of Medicine and Health Sciences, Washington, United States.,GW Cancer Center, George Washington University School of Medicine and Health Sciences, Washington, United States
| | - Xudong Cai
- Department of Anatomy and Cell Biology, George Washington University School of Medicine and Health Sciences, Washington, United States.,GW Cancer Center, George Washington University School of Medicine and Health Sciences, Washington, United States
| | - Xufeng S Wu
- Laboratory of Cell Biology, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, United States
| | - Ganhui Lan
- Department of Physics, George Washington University, Washington, United States
| | - Xiaoyan Zheng
- Department of Anatomy and Cell Biology, George Washington University School of Medicine and Health Sciences, Washington, United States.,GW Cancer Center, George Washington University School of Medicine and Health Sciences, Washington, United States
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34
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Ho EK, Stearns T. Hedgehog signaling and the primary cilium: implications for spatial and temporal constraints on signaling. Development 2021; 148:dev195552. [PMID: 33914866 PMCID: PMC8126410 DOI: 10.1242/dev.195552] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The mechanisms of vertebrate Hedgehog signaling are linked to the biology of the primary cilium, an antenna-like organelle that projects from the surface of most vertebrate cell types. Although the advantages of restricting signal transduction to cilia are often noted, the constraints imposed are less frequently considered, and yet they are central to how Hedgehog signaling operates in developing tissues. In this Review, we synthesize current understanding of Hedgehog signal transduction, ligand secretion and transport, and cilia dynamics to explore the temporal and spatial constraints imposed by the primary cilium on Hedgehog signaling in vivo.
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Affiliation(s)
- Emily K. Ho
- Department of Developmental Biology, Stanford School of Medicine, Stanford, CA 94305, USA
| | - Tim Stearns
- Department of Biology, Stanford University, Stanford, CA 94305, USA
- Department of Genetics, Stanford School of Medicine, Stanford, CA 94305, USA
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35
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Taberner L, Bañón A, Alsina B. Sensory Neuroblast Quiescence Depends on Vascular Cytoneme Contacts and Sensory Neuronal Differentiation Requires Initiation of Blood Flow. Cell Rep 2021; 32:107903. [PMID: 32668260 DOI: 10.1016/j.celrep.2020.107903] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 04/02/2020] [Accepted: 06/23/2020] [Indexed: 02/08/2023] Open
Abstract
In many organs, stem cell function depends on communication with their niche partners. Cranial sensory neurons develop in close proximity to blood vessels; however, whether vasculature is an integral component of their niches is yet unknown. Here, two separate roles for vasculature in cranial sensory neurogenesis in zebrafish are uncovered. The first involves precise spatiotemporal endothelial-neuroblast cytoneme contacts and Dll4-Notch signaling to restrain neuroblast proliferation. The second, instead, requires blood flow to trigger a transcriptional response that modifies neuroblast metabolic status and induces sensory neuron differentiation. In contrast, no role of sensory neurogenesis in vascular development is found, suggesting unidirectional signaling from vasculature to sensory neuroblasts. Altogether, we demonstrate that the cranial vasculature constitutes a niche component of the sensory ganglia that regulates the pace of their growth and differentiation dynamics.
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Affiliation(s)
- Laura Taberner
- Developmental Biology Unit, Department of Experimental and Health Sciences, Universitat Pompeu Fabra-Parc de Recerca Biomèdica de Barcelona, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Aitor Bañón
- Developmental Biology Unit, Department of Experimental and Health Sciences, Universitat Pompeu Fabra-Parc de Recerca Biomèdica de Barcelona, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Berta Alsina
- Developmental Biology Unit, Department of Experimental and Health Sciences, Universitat Pompeu Fabra-Parc de Recerca Biomèdica de Barcelona, Dr. Aiguader 88, 08003 Barcelona, Spain.
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36
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Stapornwongkul KS, Vincent JP. Generation of extracellular morphogen gradients: the case for diffusion. Nat Rev Genet 2021; 22:393-411. [PMID: 33767424 DOI: 10.1038/s41576-021-00342-y] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/23/2021] [Indexed: 02/07/2023]
Abstract
Cells within developing tissues rely on morphogens to assess positional information. Passive diffusion is the most parsimonious transport model for long-range morphogen gradient formation but does not, on its own, readily explain scaling, robustness and planar transport. Here, we argue that diffusion is sufficient to ensure robust morphogen gradient formation in a variety of tissues if the interactions between morphogens and their extracellular binders are considered. A current challenge is to assess how the affinity for extracellular binders, as well as other biophysical and cell biological parameters, determines gradient dynamics and shape in a diffusion-based transport system. Technological advances in genome editing, tissue engineering, live imaging and in vivo biophysics are now facilitating measurement of these parameters, paving the way for mathematical modelling and a quantitative understanding of morphogen gradient formation and modulation.
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37
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Wang XT, Sun H, Chen NH, Yuan YH. Tunneling nanotubes: A novel pharmacological target for neurodegenerative diseases? Pharmacol Res 2021; 170:105541. [PMID: 33711434 DOI: 10.1016/j.phrs.2021.105541] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/06/2021] [Accepted: 03/07/2021] [Indexed: 12/25/2022]
Abstract
Diversiform ways of intercellular communication are vital links in maintaining homeostasis and disseminating physiological states. Among intercellular bridges, tunneling nanotubes (TNTs) discovered in 2004 were recognized as potential pharmacology targets related to the pathogenesis of common or infrequent neurodegenerative disorders. The neurotoxic aggregates in neurodegenerative diseases including scrapie prion protein (PrPSc), mutant tau protein, amyloid-beta (Aβ) protein, alpha-synuclein (α-syn) as well as mutant Huntington (mHTT) protein could promote TNT formation via certain physiological mechanisms, in turn, mediating the intercellular transmission of neurotoxicity. In this review, we described in detail the skeleton, the formation, the physicochemical properties, and the functions of TNTs, while paying particular attention to the key role of TNTs in the transport of pathological proteins during neurodegeneration.
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Affiliation(s)
- Xiao-Tong Wang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica& Neuroscience Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.
| | - Hua Sun
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica& Neuroscience Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China; NHC Key Laboratory of Drug Addiction Medicine, The First Affiliated Hospital of Kunming Medical University, Kunming, China.
| | - Nai-Hong Chen
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica& Neuroscience Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.
| | - Yu-He Yuan
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica& Neuroscience Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.
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38
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Gore T, Matusek T, D'Angelo G, Giordano C, Tognacci T, Lavenant-Staccini L, Rabouille C, Thérond PP. The GTPase Rab8 differentially controls the long- and short-range activity of the Hedgehog morphogen gradient by regulating Hedgehog apico-basal distribution. Development 2021; 148:dev.191791. [PMID: 33547132 DOI: 10.1242/dev.191791] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 01/19/2021] [Indexed: 01/02/2023]
Abstract
The Hedgehog (Hh) morphogen gradient is required for patterning during metazoan development, yet the mechanisms involved in Hh apical and basolateral release and how this influences short- and long-range target induction are poorly understood. We found that depletion of the GTPase Rab8 in Hh-producing cells induces an imbalance between the level of apically and laterally released Hh. This leads to non-cell-autonomous differential effects on the expression of Hh target genes, namely an increase in its short-range targets and a concomitant decrease in long-range targets. We further found that Rab8 regulates the endocytosis and apico-basal distribution of Ihog, a transmembrane protein known to bind to Hh and to be crucial for establishment of the Hh gradient. Our data provide new insights into morphogen gradient formation, whereby morphogen activity is functionally distributed between apically and basolaterally secreted pools.
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Affiliation(s)
- Tanvi Gore
- Université Côte d'Azur, UMR7277 CNRS, Inserm 1091, Institut de Biologie de Valrose (iBV), Parc Valrose, 06108 Nice cedex2, France
| | - Tamás Matusek
- Université Côte d'Azur, UMR7277 CNRS, Inserm 1091, Institut de Biologie de Valrose (iBV), Parc Valrose, 06108 Nice cedex2, France
| | - Gisela D'Angelo
- Université Côte d'Azur, UMR7277 CNRS, Inserm 1091, Institut de Biologie de Valrose (iBV), Parc Valrose, 06108 Nice cedex2, France.,Institut Curie, UMR144 CNRS, 12 Rue Lhomond, 75005 Paris, France
| | - Cécile Giordano
- Université Côte d'Azur, UMR7277 CNRS, Inserm 1091, Institut de Biologie de Valrose (iBV), Parc Valrose, 06108 Nice cedex2, France.,Institut Curie, UMR144 CNRS, 12 Rue Lhomond, 75005 Paris, France
| | - Thomas Tognacci
- Université Côte d'Azur, UMR7277 CNRS, Inserm 1091, Institut de Biologie de Valrose (iBV), Parc Valrose, 06108 Nice cedex2, France
| | - Laurence Lavenant-Staccini
- Université Côte d'Azur, UMR7277 CNRS, Inserm 1091, Institut de Biologie de Valrose (iBV), Parc Valrose, 06108 Nice cedex2, France
| | - Catherine Rabouille
- Department of Cell Biology, Hubrecht Institute of the Royal Netherlands Academy of Arts and Sciences & University Medical Center Utrecht, 3584 CT Utrecht, Netherlands.,Department of Biomedical Science of Cells and Systems, University Medical Center Groningen, 9700 AD Groningen, Netherlands
| | - Pascal P Thérond
- Université Côte d'Azur, UMR7277 CNRS, Inserm 1091, Institut de Biologie de Valrose (iBV), Parc Valrose, 06108 Nice cedex2, France
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39
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Emmons-Bell M, Hariharan IK. Membrane potential regulates Hedgehog signalling in the Drosophila wing imaginal disc. EMBO Rep 2021; 22:e51861. [PMID: 33629503 PMCID: PMC8024891 DOI: 10.15252/embr.202051861] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 12/29/2020] [Accepted: 01/15/2021] [Indexed: 01/02/2023] Open
Abstract
While the membrane potential of cells has been shown to be patterned in some tissues, specific roles for membrane potential in regulating signalling pathways that function during development are still being established. In the Drosophila wing imaginal disc, Hedgehog (Hh) from posterior cells activates a signalling pathway in anterior cells near the boundary which is necessary for boundary maintenance. Here, we show that membrane potential is patterned in the wing disc. Anterior cells near the boundary, where Hh signalling is most active, are more depolarized than posterior cells across the boundary. Elevated expression of the ENaC channel Ripped Pocket (Rpk), observed in these anterior cells, requires Hh. Antagonizing Rpk reduces depolarization and Hh signal transduction. Using genetic and optogenetic manipulations, in both the wing disc and the salivary gland, we show that membrane depolarization promotes membrane localization of Smoothened and augments Hh signalling, independently of Patched. Thus, membrane depolarization and Hh‐dependent signalling mutually reinforce each other in cells immediately anterior to the compartment boundary.
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Affiliation(s)
- Maya Emmons-Bell
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA, USA
| | - Iswar K Hariharan
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA, USA
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40
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Hall ET, Dillard ME, Stewart DP, Zhang Y, Wagner B, Levine RM, Pruett-Miller SM, Sykes A, Temirov J, Cheney RE, Mori M, Robinson CG, Ogden SK. Cytoneme delivery of Sonic Hedgehog from ligand-producing cells requires Myosin 10 and a Dispatched-BOC/CDON co-receptor complex. eLife 2021; 10:61432. [PMID: 33570491 PMCID: PMC7968926 DOI: 10.7554/elife.61432] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 02/10/2021] [Indexed: 12/13/2022] Open
Abstract
Morphogens function in concentration-dependent manners to instruct cell fate during tissue patterning. The cytoneme morphogen transport model posits that specialized filopodia extend between morphogen-sending and responding cells to ensure that appropriate signaling thresholds are achieved. How morphogens are transported along and deployed from cytonemes, how quickly a cytoneme-delivered, receptor-dependent signal is initiated, and whether these processes are conserved across phyla are not known. Herein, we reveal that the actin motor Myosin 10 promotes vesicular transport of Sonic Hedgehog (SHH) morphogen in mouse cell cytonemes, and that SHH morphogen gradient organization is altered in neural tubes of Myo10-/- mice. We demonstrate that cytoneme-mediated deposition of SHH onto receiving cells induces a rapid, receptor-dependent signal response that occurs within seconds of ligand delivery. This activity is dependent upon a novel Dispatched (DISP)-BOC/CDON co-receptor complex that functions in ligand-producing cells to promote cytoneme occurrence and facilitate ligand delivery for signal activation.
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Affiliation(s)
- Eric T Hall
- Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, Memphis, United States
| | - Miriam E Dillard
- Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, Memphis, United States
| | - Daniel P Stewart
- Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, Memphis, United States
| | - Yan Zhang
- Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, Memphis, United States
| | - Ben Wagner
- Cell and Tissue Imaging Center, St. Jude Children's Research Hospital, Memphis, United States
| | - Rachel M Levine
- Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, Memphis, United States.,Center for Advanced Genome Engineering, St. Jude Children's Research Hospital, Memphis, United States
| | - Shondra M Pruett-Miller
- Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, Memphis, United States.,Center for Advanced Genome Engineering, St. Jude Children's Research Hospital, Memphis, United States
| | - April Sykes
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, United States
| | - Jamshid Temirov
- Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, Memphis, United States
| | - Richard E Cheney
- Department of Cell Biology and Physiology, University of North Carolina School of Medicine, Chapel Hill, United States
| | - Motomi Mori
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, United States
| | - Camenzind G Robinson
- Cell and Tissue Imaging Center, St. Jude Children's Research Hospital, Memphis, United States
| | - Stacey K Ogden
- Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, Memphis, United States
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41
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Modeling invasion patterns in the glioblastoma battlefield. PLoS Comput Biol 2021; 17:e1008632. [PMID: 33513131 PMCID: PMC7875342 DOI: 10.1371/journal.pcbi.1008632] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 02/10/2021] [Accepted: 12/14/2020] [Indexed: 12/27/2022] Open
Abstract
Glioblastoma is the most aggressive tumor of the central nervous system, due to its great infiltration capacity. Understanding the mechanisms that regulate the Glioblastoma invasion front is a major challenge with preeminent potential clinical relevances. In the infiltration front, the key features of tumor dynamics relate to biochemical and biomechanical aspects, which result in the extension of cellular protrusions known as tumor microtubes. The coordination of metalloproteases expression, extracellular matrix degradation, and integrin activity emerges as a leading mechanism that facilitates Glioblastoma expansion and infiltration in uncontaminated brain regions. We propose a novel multidisciplinary approach, based on in vivo experiments in Drosophila and mathematical models, that describes the dynamics of active and inactive integrins in relation to matrix metalloprotease concentration and tumor density at the Glioblastoma invasion front. The mathematical model is based on a non-linear system of evolution equations in which the mechanisms leading chemotaxis, haptotaxis, and front dynamics compete with the movement induced by the saturated flux in porous media. This approach is able to capture the relative influences of the involved agents and reproduce the formation of patterns, which drive tumor front evolution. These patterns have the value of providing biomarker information that is related to the direction of the dynamical evolution of the front and based on static measures of proteins in several tumor samples. Furthermore, we consider in our model biomechanical elements, like the tissue porosity, as indicators of the healthy tissue resistance to tumor progression. Glioblastoma (GB) is a type of brain cancer that originated from glial cells. The infiltrative nature of GB cells is a key feature for understanding its aggressiveness and resistance to current treatments. Cellular protrusions, named as Tumor Microtubes (TMs) in GB, mediate the interaction between tumor and healthy tissue and the processes leading GB invasion. These protrusions are also responsible for several cell communication pathways (e.g. Hedgehog or WNT). We have developed a multidisciplinary approach, which combined biological biomarker measurements performed in Drosophila GB with a novel mathematical model, to determine the interactions between proteases, integrins, and TM dynamics. The resulting model is able to predict the formation and infiltration of GB fronts, and, therefore, the directionality, aggressiveness, and progression of the tumor.
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42
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Manikowski D, Kastl P, Schürmann S, Ehring K, Steffes G, Jakobs P, Grobe K. C-Terminal Peptide Modifications Reveal Direct and Indirect Roles of Hedgehog Morphogen Cholesteroylation. Front Cell Dev Biol 2021; 8:615698. [PMID: 33511123 PMCID: PMC7835520 DOI: 10.3389/fcell.2020.615698] [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: 10/09/2020] [Accepted: 12/03/2020] [Indexed: 01/20/2023] Open
Abstract
Hedgehog (Hh) morphogens are involved in embryonic development and stem cell biology and, if misregulated, can contribute to cancer. One important post-translational modification with profound impact on Hh biofunction is its C-terminal cholesteroylation during biosynthesis. The current hypothesis is that the cholesterol moiety is a decisive factor in Hh association with the outer plasma membrane leaflet of producing cells, cell-surface Hh multimerization, and its transport and signaling. Yet, it is not decided whether the cholesterol moiety is directly involved in all of these processes, because their functional interdependency raises the alternative possibility that the cholesterol initiates early processes directly and that these processes can then steer later stages of Hh signaling independent of the lipid. We generated variants of the C-terminal Hh peptide and observed that these cholesteroylated peptides variably impaired several post-translational processes in producing cells and Hh biofunction in Drosophila melanogaster eye and wing development. We also found that substantial Hh amounts separated from cholesteroylated peptide tags in vitro and in vivo and that tagged and untagged Hh variants lacking their C-cholesterol moieties remained bioactive. Our approach thus confirms that Hh cholesteroylation is essential during the early steps of Hh production and maturation but also suggests that it is dispensable for Hh signal reception at receiving cells.
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Affiliation(s)
- Dominique Manikowski
- Institute of Physiological Chemistry and Pathobiochemistry and the Cells-in-Motion Cluster of Excellence (EXC1003-CiM), University of Münster, Münster, Germany
| | - Philipp Kastl
- Institute of Physiological Chemistry and Pathobiochemistry and the Cells-in-Motion Cluster of Excellence (EXC1003-CiM), University of Münster, Münster, Germany
| | - Sabine Schürmann
- Institute of Physiological Chemistry and Pathobiochemistry and the Cells-in-Motion Cluster of Excellence (EXC1003-CiM), University of Münster, Münster, Germany
| | - Kristina Ehring
- Institute of Physiological Chemistry and Pathobiochemistry and the Cells-in-Motion Cluster of Excellence (EXC1003-CiM), University of Münster, Münster, Germany
| | - Georg Steffes
- Institute of Neuro- and Behavioral Biology, University of Münster, Münster, Germany
| | - Petra Jakobs
- Institute of Physiological Chemistry and Pathobiochemistry and the Cells-in-Motion Cluster of Excellence (EXC1003-CiM), University of Münster, Münster, Germany
| | - Kay Grobe
- Institute of Physiological Chemistry and Pathobiochemistry and the Cells-in-Motion Cluster of Excellence (EXC1003-CiM), University of Münster, Münster, Germany
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43
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Hatori R, Kornberg TB. Hedgehog produced by the Drosophila wing imaginal disc induces distinct responses in three target tissues. Development 2020; 147:dev195974. [PMID: 33028613 PMCID: PMC7687861 DOI: 10.1242/dev.195974] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 09/30/2020] [Indexed: 12/11/2022]
Abstract
Hedgehog (Hh) is an evolutionarily conserved signaling protein that has essential roles in animal development and homeostasis. We investigated Hh signaling in the region of the Drosophila wing imaginal disc that produces Hh and is near the tracheal air sac primordium (ASP) and myoblasts. Hh distributes in concentration gradients in the anterior compartment of the wing disc, ASP and myoblasts, and activates genes in each tissue. Some targets of Hh signal transduction are common to the disc, ASP and myoblasts, whereas others are tissue-specific. Signaling in the three tissues is cytoneme-mediated and cytoneme-dependent. Some ASP cells project cytonemes that receive both Hh and Branchless (Bnl), and some targets regulated by Hh signaling in the ASP are also dependent on Bnl signal transduction. We conclude that the single source of Hh in the wing disc regulates cell type-specific responses in three discreet target tissues.
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Affiliation(s)
- Ryo Hatori
- Cardiovascular Research Institute, University of California San Francisco, San Francisco, CA 94143, USA
| | - Thomas B Kornberg
- Cardiovascular Research Institute, University of California San Francisco, San Francisco, CA 94143, USA
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44
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Mateska I, Nanda K, Dye NA, Alexaki VI, Eaton S. Range of SHH signaling in adrenal gland is limited by membrane contact to cells with primary cilia. J Biophys Biochem Cytol 2020; 219:211483. [PMID: 33090184 PMCID: PMC7588141 DOI: 10.1083/jcb.201910087] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 07/27/2020] [Accepted: 09/15/2020] [Indexed: 01/04/2023] Open
Abstract
The signaling protein Sonic Hedgehog (SHH) is crucial for the development and function of many vertebrate tissues. It remains largely unclear, however, what defines the range and specificity of pathway activation. The adrenal gland represents a useful model to address this question, where the SHH pathway is activated in a very specific subset of cells lying near the SHH-producing cells, even though there is an abundance of lipoproteins that would allow SHH to travel and signal long-range. We determine that, whereas adrenal cells can secrete SHH on lipoproteins, this form of SHH is inactive due to the presence of cosecreted inhibitors, potentially explaining the absence of long-range signaling. Instead, we find that SHH-producing cells signal at short range via membrane-bound SHH, only to receiving cells with primary cilia. Finally, our data from NCI-H295R adrenocortical carcinoma cells suggest that adrenocortical tumors may evade these regulatory control mechanisms by acquiring the ability to activate SHH target genes in response to TGF-β.
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Affiliation(s)
- Ivona Mateska
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany,Biotechnologisches Zentrum, Technische Universität Dresden, Dresden, Germany,Correspondence to Ivona Mateska:
| | - Kareena Nanda
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Natalie A. Dye
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Vasileia Ismini Alexaki
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Suzanne Eaton
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany,Biotechnologisches Zentrum, Technische Universität Dresden, Dresden, Germany
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45
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Eckardt M, Painter KJ, Surulescu C, Zhigun A. Nonlocal and local models for taxis in cell migration: a rigorous limit procedure. J Math Biol 2020; 81:1251-1298. [PMID: 33068155 PMCID: PMC7716906 DOI: 10.1007/s00285-020-01536-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 08/18/2020] [Indexed: 01/20/2023]
Abstract
A rigorous limit procedure is presented which links nonlocal models involving adhesion or nonlocal chemotaxis to their local counterparts featuring haptotaxis and classical chemotaxis, respectively. It relies on a novel reformulation of the involved nonlocalities in terms of integral operators applied directly to the gradients of signal-dependent quantities. The proposed approach handles both model types in a unified way and extends the previous mathematical framework to settings that allow for general solution-dependent coefficient functions. The previous forms of nonlocal operators are compared with the new ones introduced in this paper and the advantages of the latter are highlighted by concrete examples. Numerical simulations in 1D provide an illustration of some of the theoretical findings.
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Affiliation(s)
- Maria Eckardt
- Felix-Klein-Zentrum für Mathematik, Technische Universität Kaiserslautern, Paul-Ehrlich-Str. 31, 67663, Kaiserslautern, Germany
| | - Kevin J Painter
- Department of Mathematics & Maxwell Institute, Heriot-Watt University, Edinburgh, EH14 4AS, Scotland, UK
| | - Christina Surulescu
- Felix-Klein-Zentrum für Mathematik, Technische Universität Kaiserslautern, Paul-Ehrlich-Str. 31, 67663, Kaiserslautern, Germany
| | - Anna Zhigun
- School of Mathematics and Physics, Queen's University Belfast, University Road, Belfast, BT7 1NN, Northern Ireland, UK.
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46
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Matusek T, Marcetteau J, Thérond PP. Functions of Wnt and Hedgehog-containing extracellular vesicles in development and disease. J Cell Sci 2020; 133:133/18/jcs209742. [PMID: 32989011 DOI: 10.1242/jcs.209742] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Secreted morphogens play a major role in the intercellular communication necessary for animal development. It was initially thought that, in order to organize tissue morphogenesis and control cell fate and proliferation, morphogens diffused freely in the extracellular space. This view has since changed following the discovery that morphogens of the Wnt and Hedgehog (Hh) families are modified by various lipid adducts during their biosynthesis, providing them with high affinity for the membrane bilayer. Recent work performed in model organisms suggests that Wnt and Hh proteins are carried on extracellular vesicles. In this Review, we provide our perspectives on the mechanisms of formation of Wnt- and Hh-containing extracellular vesicles, and discuss their functions during animal development, as well as in various human physiopathologies.
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Affiliation(s)
- Tamás Matusek
- Université Côte d'Azur, CNRS, INSERM, Institut de Biologie Valrose (iBV), Parc Valrose, 06108 Nice Cedex 2, France
| | - Julien Marcetteau
- Université Côte d'Azur, CNRS, INSERM, Institut de Biologie Valrose (iBV), Parc Valrose, 06108 Nice Cedex 2, France
| | - Pascal P Thérond
- Université Côte d'Azur, CNRS, INSERM, Institut de Biologie Valrose (iBV), Parc Valrose, 06108 Nice Cedex 2, France
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47
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Eom DS. Airinemes: thin cellular protrusions mediate long-distance signalling guided by macrophages. Open Biol 2020; 10:200039. [PMID: 32810422 PMCID: PMC7479939 DOI: 10.1098/rsob.200039] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Understanding the mechanisms of cell-to-cell communication is one of the fundamental questions in biology and medicine. In particular, long-range signalling where cells communicate over several cell diameters is vital during development and homeostasis. The major morphogens, their receptors and intracellular signalling cascades have largely been identified; however, there is a gap in our knowledge of how such signalling factors are propagated over a long distance. In addition to the diffusion-based propagation model, new modalities of disseminating signalling molecules have been identified. It has been shown that cells can communicate with direct contact through long, thin cellular protrusions between signal sending and receiving cells at a distance. Recent studies have revealed a type of cellular protrusion termed 'airinemes' in zebrafish pigment cell types. They share similarities with previously reported cellular protrusions; however, they also exhibit distinct morphology and features. Airinemes are indispensable for pigment pattern development by mediating long-distance Delta-Notch signalling between different pigment cell types. Notably, airineme-mediated signalling is dependent on skin-resident macrophages. Key findings of airineme-mediated intercellular signalling in pattern development, their interplay with macrophages and their implications for the understanding of cellular protrusion-mediated intercellular communication will be discussed.
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Affiliation(s)
- Dae Seok Eom
- Department of Developmental and Cell Biology, University of California, Irvine, CA 92697, USA
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48
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Rushton E, Kopke DL, Broadie K. Extracellular heparan sulfate proteoglycans and glycan-binding lectins orchestrate trans-synaptic signaling. J Cell Sci 2020; 133:133/15/jcs244186. [PMID: 32788209 DOI: 10.1242/jcs.244186] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The exceedingly narrow synaptic cleft (<20 nm) and adjacent perisynaptic extracellular space contain an astonishing array of secreted and membrane-anchored glycoproteins. A number of these extracellular molecules regulate intercellular trans-synaptic signaling by binding to ligands, acting as co-receptors or modulating ligand-receptor interactions. Recent work has greatly expanded our understanding of extracellular proteoglycan and glycan-binding lectin families as key regulators of intercellular signaling at the synapse. These secreted proteins act to regulate the compartmentalization of glycoprotein ligands and receptors, crosslink dynamic extracellular and cell surface lattices, modulate both exocytosis and endocytosis vesicle cycling, and control postsynaptic receptor trafficking. Here, we focus closely on the Drosophila glutamatergic neuromuscular junction (NMJ) as a model synapse for understanding extracellular roles of the many heparan sulfate proteoglycan (HSPG) and lectin proteins that help determine synaptic architecture and neurotransmission strength. We particularly concentrate on the roles of extracellular HSPGs and lectins in controlling trans-synaptic signaling, especially that mediated by the Wnt and BMP pathways. These signaling mechanisms are causally linked to a wide spectrum of neurological disease states that impair coordinated movement and cognitive functions.
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Affiliation(s)
- Emma Rushton
- Department of Biological Sciences, Brain Institute, and Kennedy Center for Research on Human Development, Vanderbilt University, Nashville, TN 37235, USA
| | - Danielle L Kopke
- Department of Biological Sciences, Brain Institute, and Kennedy Center for Research on Human Development, Vanderbilt University, Nashville, TN 37235, USA
| | - Kendal Broadie
- Department of Biological Sciences, Brain Institute, and Kennedy Center for Research on Human Development, Vanderbilt University, Nashville, TN 37235, USA
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49
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González‐Méndez L, Gradilla A, Sánchez‐Hernández D, González E, Aguirre‐Tamaral A, Jiménez‐Jiménez C, Guerra M, Aguilar G, Andrés G, Falcón‐Pérez JM, Guerrero I. Polarized sorting of Patched enables cytoneme-mediated Hedgehog reception in the Drosophila wing disc. EMBO J 2020; 39:e103629. [PMID: 32311148 PMCID: PMC7265244 DOI: 10.15252/embj.2019103629] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 03/04/2020] [Accepted: 03/18/2020] [Indexed: 12/11/2022] Open
Abstract
Hedgehog (Hh) signal molecules play a fundamental role in development, adult stem cell maintenance and cancer. Hh can signal at a distance, and we have proposed that its graded distribution across Drosophila epithelia is mediated by filopodia-like structures called cytonemes. Hh reception by Patched (Ptc) happens at discrete sites along presenting and receiving cytonemes, reminiscent of synaptic processes. Here, we show that a vesicle fusion mechanism mediated by SNARE proteins is required for Ptc placement at contact sites. Transport of Ptc to these sites requires multivesicular bodies (MVBs) formation via ESCRT machinery, in a manner different to that regulating Ptc/Hh lysosomal degradation after reception. These MVBs include extracellular vesicle (EV) markers and, accordingly, Ptc is detected in the purified exosomal fraction from cultured cells. Blockage of Ptc trafficking and fusion to basolateral membranes result in low levels of Ptc presentation for reception, causing an extended and flattened Hh gradient.
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Affiliation(s)
- Laura González‐Méndez
- Tissue and Organ HomeostasisCentro de Biología Molecular “Severo Ochoa” (CSIC‐UAM), Nicolás Cabrera 1Universidad Autónoma de MadridMadridSpain
| | - Ana‐Citlali Gradilla
- Tissue and Organ HomeostasisCentro de Biología Molecular “Severo Ochoa” (CSIC‐UAM), Nicolás Cabrera 1Universidad Autónoma de MadridMadridSpain
| | - David Sánchez‐Hernández
- Tissue and Organ HomeostasisCentro de Biología Molecular “Severo Ochoa” (CSIC‐UAM), Nicolás Cabrera 1Universidad Autónoma de MadridMadridSpain
| | - Esperanza González
- Exosomes Lab. Center for Cooperative Research in Biosciences (CIC bioGUNE)Basque Research and Technology Alliance (BRTA)DerioSpain
| | - Adrián Aguirre‐Tamaral
- Tissue and Organ HomeostasisCentro de Biología Molecular “Severo Ochoa” (CSIC‐UAM), Nicolás Cabrera 1Universidad Autónoma de MadridMadridSpain
| | - Carlos Jiménez‐Jiménez
- Tissue and Organ HomeostasisCentro de Biología Molecular “Severo Ochoa” (CSIC‐UAM), Nicolás Cabrera 1Universidad Autónoma de MadridMadridSpain
| | - Milagros Guerra
- Electron Microscopy UnitCentro de Biología Molecular Severo Ochoa(CSIC‐UAM)Nicolás Cabrera 1Universidad Autonoma de MadridMadridSpain
| | - Gustavo Aguilar
- Tissue and Organ HomeostasisCentro de Biología Molecular “Severo Ochoa” (CSIC‐UAM), Nicolás Cabrera 1Universidad Autónoma de MadridMadridSpain
- Growth and DevelopmentBiozentrumUniversity of BaselBaselSwitzerland
| | - Germán Andrés
- Electron Microscopy UnitCentro de Biología Molecular Severo Ochoa(CSIC‐UAM)Nicolás Cabrera 1Universidad Autonoma de MadridMadridSpain
| | - Juan M Falcón‐Pérez
- Exosomes Lab. Center for Cooperative Research in Biosciences (CIC bioGUNE)Basque Research and Technology Alliance (BRTA)DerioSpain
- IKERBASQUEBasque Foundation for ScienceBilbaoSpain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd)DerioSpain
| | - Isabel Guerrero
- Tissue and Organ HomeostasisCentro de Biología Molecular “Severo Ochoa” (CSIC‐UAM), Nicolás Cabrera 1Universidad Autónoma de MadridMadridSpain
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50
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Subramaniam S. Rhes Tunnels: A Radical New Way of Communication in the Brain's Striatum? Bioessays 2020; 42:e1900231. [PMID: 32236969 PMCID: PMC7310467 DOI: 10.1002/bies.201900231] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 02/13/2020] [Indexed: 12/11/2022]
Abstract
Ras homolog enriched in the striatum (Rhes) is a striatal enriched protein that promotes the formation of thin membranous tubes resembling tunneling nanotubes (TNT)-"Rhes tunnels"-that connect neighboring cell and transport cargoes: vesicles and proteins between the neuronal cells. Here the literature on TNT-like structures is reviewed, and the implications of Rhes-mediated TNT, the mechanisms of its formation, and its potential in novel cell-to-cell communication in regulating striatal biology and disease are emphasized. Thought-provoking ideas regarding how Rhes-mediated TNT, if it exists, in vivo, would radically change the way neurons communicate in the brain are discussed.
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