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Vanneste F, Faure A, Varache M, Menendez-Miranda M, Dyon-Tafani V, Dussurgey S, Errazuriz-Cerda E, La Padula V, Alcouffe P, Carrière M, Gref R, Laurent F, Josse J, Ladavière C. LipoParticles: a lipid membrane coating onto polymer particles to enhance the internalization in osteoblast cells. Nanoscale 2023; 15:18015-18032. [PMID: 37916389 DOI: 10.1039/d3nr03267a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
LipoParticles, core-shell assemblies consisting of a polymer core coated by a lipid membrane, are promising carriers for drug delivery applications with intracellular targets. This is of great interest since it is actually challenging to treat infections involving intracellular bacteria such as bone and joint infections where the bacteria are hidden in osteoblast cells. The present work reports for the first time to the best of our knowledge the proof of enhanced internalization of particles in osteoblast cells thanks to a lipid coating of particles (= LipoParticles). The ca. 300 nm-sized assemblies were elaborated by reorganization of liposomes (composed of DPPC/DPTAP 10/90 mol/mol) onto the surface of poly(lactic-co-glycolic acid) (PLGA) particles, and were characterized by dynamic light scattering (DLS), transmission electron microscopy (TEM), and zetametry. Optimization of these assemblies was also performed by adding poly(ethylene glycol) (PEG) chains on their surface (corresponding to a final formulation of DPPC/DPTAP/DPPE-PEG5000 8/90/2 mol/mol/mol). Interestingly, this provided them colloidal stability after their 20-fold dilution in PBS or cell culture medium, and made possible their freeze-drying without forming aggregates after their re-hydration. Their non-cytotoxicity towards a human osteoblast cell line (MG63) was also demonstrated. The enhanced internalization of LipoParticles in this MG63 cell line, in comparison with PLGA particles, was proven by observations with a confocal laser scanning microscope, as well as by flow cytometry assays. Finally, this efficient internalization of LipoParticles in MG63 cells was confirmed by TEM on ultrathin sections, which also revealed localization close to intracellular Staphylococcus aureus.
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Affiliation(s)
- Florian Vanneste
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, INSA Lyon, Université Jean Monnet, UMR 5223, Ingénierie des Matériaux Polymères F-69622 Cedex, France.
| | - Allison Faure
- Centre International de Recherche en Infectiologie (CIRI), Université de Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Lyon, France.
| | - Mathieu Varache
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, INSA Lyon, Université Jean Monnet, UMR 5223, Ingénierie des Matériaux Polymères F-69622 Cedex, France.
| | - Mario Menendez-Miranda
- Institut de Sciences Moléculaires d'Orsay (ISMO), Univ. of Paris-Sud, Orsay 91405, France
| | - Virginie Dyon-Tafani
- Centre International de Recherche en Infectiologie (CIRI), Université de Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Lyon, France.
| | - Sébastien Dussurgey
- Structure Fédérative de Recherche Biosciences, UMS344/US8, Inserm, CNRS, Université Claude Bernard Lyon-1, ENS de Lyon, Lyon, France
| | | | - Veronica La Padula
- Centre Technologique des Microstructures, Université Claude Bernard Lyon 1, Villeurbanne, France
| | - Pierre Alcouffe
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, INSA Lyon, Université Jean Monnet, UMR 5223, Ingénierie des Matériaux Polymères F-69622 Cedex, France.
| | - Marie Carrière
- Université Grenoble-Alpes, CEA, CNRS, IRIG, SyMMES, CIBEST, 38000 Grenoble, France
| | - Ruxandra Gref
- Institut de Sciences Moléculaires d'Orsay (ISMO), Univ. of Paris-Sud, Orsay 91405, France
| | - Frédéric Laurent
- Centre International de Recherche en Infectiologie (CIRI), Université de Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Lyon, France.
| | - Jérôme Josse
- Centre International de Recherche en Infectiologie (CIRI), Université de Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Lyon, France.
| | - Catherine Ladavière
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, INSA Lyon, Université Jean Monnet, UMR 5223, Ingénierie des Matériaux Polymères F-69622 Cedex, France.
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Aloy MT, Sidi Boumedine J, Deville A, Kryza D, Gauthier A, Brichart-Vernos D, Ollier G, La Padula V, Lux F, Tillement O, Rodriguez-Lafrasse C, Janier M. Proof of Concept of the Radiosensitizing Effect of Gadolinium Oxide Nanoparticles in Cell Spheroids and a Tumor-Implanted Murine Model of Chondrosarcoma. Int J Nanomedicine 2022; 17:6655-6673. [PMID: 36582458 PMCID: PMC9793741 DOI: 10.2147/ijn.s390056] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 12/09/2022] [Indexed: 12/25/2022] Open
Abstract
Purpose Chondrosarcomas (CHSs), which represent 20% of primary bone tumors in adults, are mostly resistant to radio- and chemotherapy. It is therefore essential that new therapeutic approaches, targeted to the tumour, be developed to improve the prognosis of patients. The effectiveness, as a radiosensitizing agent, of gadolinium oxide nanoparticles (GdoNP, AGuIX®) nanoparticles in CHS was evaluated in vitro, in spheroid CHS models allowing to reproduce cell-cell extracellular matrix interactions, and, in vivo, in a nude mouse model with heterotopic tumour xenograft. Methods Spheroids from SW1353 and HEMC-SS cells were characterized by confocal microscopy with or without GdoNP treatment. Real-time microscopy enabled quantification of cell viability, cell migration and invasion. In vivo, the efficacy of the association of GdoNP combined with a single (4Gy) or fractionated (4x1Gy) irradiation was evaluated in HEMC-SS tumor-bearing mice by monitoring tumor growth, mouse survival and gene expression profile. Results The expression of proteoglycans in the extra-cellular matrix (ECM) of spheroids demonstrated the relevance of the 3-D model. The combination of GdoNP with single or fractionated irradiation increased the lethal effects of irradiation on 2-D- and 3-D-cultured cells. In vivo, a single or a fractionated dose of 4 Gy associated with IT or IV injection of GdoNP decreased tumor growth significantly. Only IT injection increased mice survival. Unexpectedly, the radiosensitizing effect of GdoNP was associated, in vitro, with a significant decrease in invasion-migration capacities and, in vivo, with the decreased expression of PTX3, a protein involved in the epithelial-to-mesenchymal transition process, suggesting a potential impact of GdoNP on metastasis formation. Conclusion These results provide the first proof of concept of the radiosensitizing effect of GdoNP in CHSs and opened the way for a multicentre, randomized Phase 2 trial evaluating the association of GdoNP with radiotherapy for the therapeutic management of patients with symptomatic inoperable musculoskeletal tumor lesions.
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Affiliation(s)
- Marie-Thérèse Aloy
- Laboratory of Cellular and Molecular Radiobiology, UMR CNRS5822/IP2I, Lyon-Sud Medical School, Univ Lyon, Lyon 1 University, Oullins, France
| | | | - Agathe Deville
- CNRS, LAGEPP, UMR5007, IMTHERNAT, Lyon 1 University, Hospital Edouard Herriot, Lyon, France,Department of Nuclear Medicine, Groupement Hospitalier Est, Hospices Civils de Lyon, Lyon, France
| | - David Kryza
- CNRS, LAGEPP, UMR5007, IMTHERNAT, Lyon 1 University, Hospital Edouard Herriot, Lyon, France
| | - Arnaud Gauthier
- Laboratory of Cellular and Molecular Radiobiology, UMR CNRS5822/IP2I, Lyon-Sud Medical School, Univ Lyon, Lyon 1 University, Oullins, France,Department of Biochemistry and Molecular Biology, Groupement Hospitalier Sud, Hospices Civils de Lyon, Pierre-Bénite, France
| | - Delphine Brichart-Vernos
- Laboratory of Cellular and Molecular Radiobiology, UMR CNRS5822/IP2I, Lyon-Sud Medical School, Univ Lyon, Lyon 1 University, Oullins, France,Light Matter Institut UMR CNRS 5306, Lyon 1 University, Villeurbanne, France
| | - Grégoire Ollier
- Laboratory of Cellular and Molecular Radiobiology, UMR CNRS5822/IP2I, Lyon-Sud Medical School, Univ Lyon, Lyon 1 University, Oullins, France
| | - Veronica La Padula
- Light Matter Institut UMR CNRS 5306, Lyon 1 University, Villeurbanne, France
| | - François Lux
- Light Matter Institut UMR CNRS 5306, Lyon 1 University, Villeurbanne, France
| | - Olivier Tillement
- Light Matter Institut UMR CNRS 5306, Lyon 1 University, Villeurbanne, France
| | - Claire Rodriguez-Lafrasse
- Laboratory of Cellular and Molecular Radiobiology, UMR CNRS5822/IP2I, Lyon-Sud Medical School, Univ Lyon, Lyon 1 University, Oullins, France,Department of Biochemistry and Molecular Biology, Groupement Hospitalier Sud, Hospices Civils de Lyon, Pierre-Bénite, France
| | - Marc Janier
- CNRS, LAGEPP, UMR5007, IMTHERNAT, Lyon 1 University, Hospital Edouard Herriot, Lyon, France,Department of Nuclear Medicine, Groupement Hospitalier Est, Hospices Civils de Lyon, Lyon, France,Correspondence: Marc Janier, Department of Nuclear Medicine, Groupement Hospitalier Est, Hospices Civils de Lyon, Lyon, 69634, France, Tel +33472356999, Fax +33472357345, Email
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Gilles LM, Calhau ARM, La Padula V, Jacquier NMA, Lionnet C, Martinant JP, Rogowsky PM, Widiez T. Lipid anchoring and electrostatic interactions target NOT-LIKE-DAD to pollen endo-plasma membrane. J Cell Biol 2021; 220:212519. [PMID: 34323919 PMCID: PMC8327379 DOI: 10.1083/jcb.202010077] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 06/04/2021] [Accepted: 07/08/2021] [Indexed: 01/16/2023] Open
Abstract
Phospholipases cleave phospholipids, major membrane constituents. They are thus essential for many developmental processes, including male gamete development. In flowering plants, mutation of phospholipase NOT-LIKE-DAD (NLD, also known as MTL or ZmPLA1) leads to peculiar defects in sexual reproduction, notably the induction of maternal haploid embryos. Contrary to previous reports, NLD does not localize to cytosol and plasma membrane of sperm cells but to the pollen endo-plasma membrane (endo-PM), a specific membrane derived from the PM of the pollen vegetative cell that encircles the two sperm cells. After pollen tube burst, NLD localizes at the apical region of the egg apparatus. Pharmacological approaches coupled with targeted mutagenesis revealed that lipid anchoring together with electrostatic interactions are involved in the attachment of NLD to this atypical endo-PM. Membrane surface-charge and lipid biosensors indicated that phosphatidylinositol-4,5-bisphosphate is enriched in the endo-PM, uncovering a unique example of how membrane electrostatic properties can define a specific polar domain (i.e., endo-PM), which is critical for plant reproduction and gamete formation.
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Affiliation(s)
- Laurine M Gilles
- Laboratoire Reproduction et Développement des Plantes, Univ Lyon, ENS de Lyon, UCB Lyon 1, CNRS, INRAE, F-69342, Lyon, France.,Limagrain, Limagrain Field Seeds, Research Centre, Gerzat, France
| | - Andrea R M Calhau
- Laboratoire Reproduction et Développement des Plantes, Univ Lyon, ENS de Lyon, UCB Lyon 1, CNRS, INRAE, F-69342, Lyon, France
| | - Veronica La Padula
- Centre Technologique des Microstructures, Université de Lyon 1, Lyon, France
| | - Nathanaël M A Jacquier
- Laboratoire Reproduction et Développement des Plantes, Univ Lyon, ENS de Lyon, UCB Lyon 1, CNRS, INRAE, F-69342, Lyon, France.,Limagrain, Limagrain Field Seeds, Research Centre, Gerzat, France
| | - Claire Lionnet
- Laboratoire Reproduction et Développement des Plantes, Univ Lyon, ENS de Lyon, UCB Lyon 1, CNRS, INRAE, F-69342, Lyon, France
| | | | - Peter M Rogowsky
- Laboratoire Reproduction et Développement des Plantes, Univ Lyon, ENS de Lyon, UCB Lyon 1, CNRS, INRAE, F-69342, Lyon, France
| | - Thomas Widiez
- Laboratoire Reproduction et Développement des Plantes, Univ Lyon, ENS de Lyon, UCB Lyon 1, CNRS, INRAE, F-69342, Lyon, France
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Talagas M, Lebonvallet N, Leschiera R, Sinquin G, Elies P, Haftek M, Pennec JP, Ressnikoff D, La Padula V, Le Garrec R, L'herondelle K, Mignen O, Le Pottier L, Kerfant N, Reux A, Marcorelles P, Misery L. Keratinocytes Communicate with Sensory Neurons via Synaptic-like Contacts. Ann Neurol 2020; 88:1205-1219. [PMID: 32951274 DOI: 10.1002/ana.25912] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 09/11/2020] [Accepted: 09/11/2020] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Pain, temperature, and itch are conventionally thought to be exclusively transduced by the intraepidermal nerve endings. Although recent studies have shown that epidermal keratinocytes also participate in sensory transduction, the mechanism underlying keratinocyte communication with intraepidermal nerve endings remains poorly understood. We sought to demonstrate the synaptic character of the contacts between keratinocytes and sensory neurons and their involvement in sensory communication between keratinocytes and sensory neurons. METHODS Contacts were explored by morphological, molecular, and functional approaches in cocultures of epidermal keratinocytes and sensory neurons. To interrogate whether structures observed in vitro were also present in the human epidermis, in situ correlative light electron microscopy was performed on human skin biopsies. RESULTS Epidermal keratinocytes dialogue with sensory neurons through en passant synaptic-like contacts. These contacts have the ultrastructural features and molecular hallmarks of chemical synaptic-like contacts: narrow intercellular cleft, keratinocyte synaptic vesicles expressing synaptophysin and synaptotagmin 1, and sensory information transmitted from keratinocytes to sensory neurons through SNARE-mediated (syntaxin1) vesicle release. INTERPRETATION By providing selective communication between keratinocytes and sensory neurons, synaptic-like contacts are the hubs of a 2-site receptor. The permanent epidermal turnover, implying a specific en passant structure and high plasticity, may have delayed their identification, thereby contributing to the long-held concept of nerve endings passing freely between keratinocytes. The discovery of keratinocyte-sensory neuron synaptic-like contacts may call for a reassessment of basic assumptions in cutaneous sensory perception and sheds new light on the pathophysiology of pain and itch as well as the physiology of touch. ANN NEUROL 2020;88:1205-1219.
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Affiliation(s)
- Matthieu Talagas
- Univ Brest, LIEN, Brest University, F-29200 Brest, France.,Department of Pathology, Brest University Hospital, Brest, France.,Univ Brest, Brest Institute of Health Agro Matter, Brest University, F-29200 Brest, France
| | - Nicolas Lebonvallet
- Univ Brest, LIEN, Brest University, F-29200 Brest, France.,Univ Brest, Brest Institute of Health Agro Matter, Brest University, F-29200 Brest, France
| | - Raphael Leschiera
- Univ Brest, LIEN, Brest University, F-29200 Brest, France.,Univ Brest, Brest Institute of Health Agro Matter, Brest University, F-29200 Brest, France
| | - Gerard Sinquin
- Univ Brest, Imagery and Microscopic Measures Facility, Brest University, F-29200 Brest, France
| | - Philippe Elies
- Univ Brest, Imagery and Microscopic Measures Facility, Brest University, F-29200 Brest, France
| | - Marek Haftek
- Laboratory of Tissue Biology and Therapeutic Engineering, University of Lyon 1, UMR 5305 CNRS-UCBL1, Lyon, France
| | - Jean-Pierre Pennec
- Univ Brest, Brest Institute of Health Agro Matter, Brest University, F-29200 Brest, France.,Univ Brest, Movement Sport and Health (EA1274), Brest University, F-29200 Brest, France
| | - Denis Ressnikoff
- East Lyon Center of Quantitative Imagery, University of Lyon 1, INSERM US 7-CNRS UMS 3453, Lyon, France
| | - Veronica La Padula
- Technological Center of Microstructures, University of Lyon 1, Lyon, France
| | - Raphaele Le Garrec
- Univ Brest, LIEN, Brest University, F-29200 Brest, France.,Univ Brest, Brest Institute of Health Agro Matter, Brest University, F-29200 Brest, France
| | - Killian L'herondelle
- Univ Brest, LIEN, Brest University, F-29200 Brest, France.,Univ Brest, Brest Institute of Health Agro Matter, Brest University, F-29200 Brest, France
| | - Olivier Mignen
- Univ Brest, Brest Institute of Health Agro Matter, Brest University, F-29200 Brest, France.,Univ Brest, INSERM, UMR 1227, Brest University, F-29200 Brest, France
| | - Laetitia Le Pottier
- Univ Brest, Brest Institute of Health Agro Matter, Brest University, F-29200 Brest, France.,Univ Brest, INSERM, UMR 1227, Brest University, F-29200 Brest, France
| | - Nathalie Kerfant
- Department of Plastic, Reconstructive, and Esthetic Surgery, Brest University Hospital, Brest, France
| | - Alexia Reux
- Univ Brest, LIEN, Brest University, F-29200 Brest, France
| | - Pascale Marcorelles
- Univ Brest, LIEN, Brest University, F-29200 Brest, France.,Department of Pathology, Brest University Hospital, Brest, France.,Univ Brest, Brest Institute of Health Agro Matter, Brest University, F-29200 Brest, France
| | - Laurent Misery
- Univ Brest, LIEN, Brest University, F-29200 Brest, France.,Univ Brest, Brest Institute of Health Agro Matter, Brest University, F-29200 Brest, France.,Department of Dermatology, Brest University Hospital, Brest, France
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Yan X, La Padula V, Favre-Bonte S, Bernard J. Heptyl mannose decorated glyconanoparticles with tunable morphologies through polymerization induced self-assembly. Synthesis, functionalization and interactions with type 1 piliated E. coli. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.12.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Koszinowski S, La Padula V, Edlich F, Krieglstein K, Busch H, Boerries M. Bid Expression Network Controls Neuronal Cell Fate During Avian Ciliary Ganglion Development. Front Physiol 2018; 9:797. [PMID: 30008673 PMCID: PMC6034111 DOI: 10.3389/fphys.2018.00797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 06/07/2018] [Indexed: 11/13/2022] Open
Abstract
Avian ciliary ganglion (CG) development involves a transient execution phase of apoptosis controlling the final number of neurons, but the time-dependent molecular mechanisms for neuronal cell fate are largely unknown. To elucidate the molecular networks regulating important aspects of parasympathetic neuronal development, a genome-wide expression analysis was performed during multiple stages of avian CG development between embryonic days E6 and E14. The transcriptome data showed a well-defined sequence of events, starting from neuronal migration via neuronal fate cell determination, synaptic transmission, and regulation of synaptic plasticity to growth factor associated signaling. In particular, we extracted a neuronal apoptosis network that characterized the cell death execution phase at E8/E9 and apoptotic cell clearance at E14 by combining the gene time series analysis with network synthesis from the chicken interactome. Network analysis identified TP53 as key regulator and predicted involvement of the BH3 interacting domain death agonist (BID). A virus-based RNAi knockdown approach in vivo showed a crucial impact of BID expression on the execution of ontogenetic programmed cell death (PCD). In contrast, Bcl-XL expression did not impact PCD. Therefore, BID-mediated apoptosis represents a novel cue essential for timing within CG maturation.
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Affiliation(s)
- Sophie Koszinowski
- Department of Molecular Embryology, Institute of Anatomy and Cell Biology, Albert-Ludwigs-University Freiburg, Freiburg, Germany.,Faculty of Biology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Veronica La Padula
- Department of Molecular Embryology, Institute of Anatomy and Cell Biology, Albert-Ludwigs-University Freiburg, Freiburg, Germany.,Faculty of Biology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Frank Edlich
- Institute for Biochemistry and Molecular Biology, and Centre for Biological Signalling Studies BIOSS, Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Kerstin Krieglstein
- Department of Molecular Embryology, Institute of Anatomy and Cell Biology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Hauke Busch
- Institute of Molecular Medicine and Cell Research, Albert-Ludwigs-University Freiburg, Freiburg, Germany.,Luebeck Institute for Experimental Dermatology, University of Lübeck, Lübeck, Germany.,Institute for Cardiogenetics, University of Lübeck, Lübeck, Germany
| | - Melanie Boerries
- Institute of Molecular Medicine and Cell Research, Albert-Ludwigs-University Freiburg, Freiburg, Germany.,German Cancer Consortium (DKTK), Freiburg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany
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La Padula V, Staszewski O, Nestel S, Busch H, Boerries M, Roussa E, Prinz M, Krieglstein K. HSPB3 protein is expressed in motoneurons and induces their survival after lesion-induced degeneration. Exp Neurol 2016; 286:40-49. [PMID: 27567740 DOI: 10.1016/j.expneurol.2016.08.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 07/08/2016] [Accepted: 08/23/2016] [Indexed: 02/06/2023]
Abstract
The human small heat shock proteins (HSPBs) form a family of molecular chaperones comprising ten members (HSPB1-HSPB10), whose functions span from protein quality control to cytoskeletal dynamics and cell death control. Mutations in HSPBs can lead to human disease and particularly point mutations in HSPB1 and HSPB8 are known to lead to peripheral neuropathies. Recently, a missense mutation (R7S) in yet another member of this family, HSPB3, was found to cause an axonal motor neuropathy (distal hereditary motor neuropathy type 2C, dHMN2C). Until now, HSPB3 protein localization and function in motoneurons (MNs) have not yet been characterized. Therefore, we studied the endogenous HSPB3 protein distribution in the spinal cords of chicken and mouse embryos and in the postnatal nervous system (central and peripheral) of chicken, mouse and human. We further investigated the impact of wild-type and mutated HSPB3 on MN cell death via overexpressing these genes in ovo in an avian model of MN degeneration, the limb-bud removal. Altogether, our findings represent a first step for a better understanding of the cellular and molecular mechanisms leading to dHMN2C.
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Affiliation(s)
- Veronica La Padula
- Institute of Anatomy and Cell Biology, Department of Molecular Embryology, Albertstraße 17, 79104 Freiburg, Germany.
| | - Ori Staszewski
- Institute of Neuropathology, Neurozentrum, Breisacherstraße 64, 79106 Freiburg, Germany.
| | - Sigrun Nestel
- Institute of Anatomy and Cell Biology, Department of Neuroanatomy, Albertstraße 17, 79104 Freiburg, Germany
| | - Hauke Busch
- Systems Biology of the Cellular Microenvironment Group, Institute of Molecular Medicine and Cell Research, University of Freiburg, Germany; German Cancer Consortium (DKTK), Freiburg, Germany; German Cancer Research Center (DKFZ), Heidelberg, Germany.
| | - Melanie Boerries
- Systems Biology of the Cellular Microenvironment Group, Institute of Molecular Medicine and Cell Research, University of Freiburg, Germany; German Cancer Consortium (DKTK), Freiburg, Germany; German Cancer Research Center (DKFZ), Heidelberg, Germany.
| | - Eleni Roussa
- Institute of Anatomy and Cell Biology, Department of Molecular Embryology, Albertstraße 17, 79104 Freiburg, Germany; Institute of Anatomy and Cell Biology, Department of Neuroanatomy, Albertstraße 17, 79104 Freiburg, Germany.
| | - Marco Prinz
- Institute of Neuropathology, Neurozentrum, Breisacherstraße 64, 79106 Freiburg, Germany; BIOSS Centre for Biological Signalling Studies, University of Freiburg, Germany.
| | - Kerstin Krieglstein
- Institute of Anatomy and Cell Biology, Department of Molecular Embryology, Albertstraße 17, 79104 Freiburg, Germany.
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Gazzerro E, Baldassari S, Giacomini C, Musante V, Fruscione F, La Padula V, Biancheri R, Scarfì S, Prada V, Sotgia F, Duncan ID, Zara F, Werner HB, Lisanti MP, Nobbio L, Corradi A, Minetti C. Hyccin, the molecule mutated in the leukodystrophy hypomyelination and congenital cataract (HCC), is a neuronal protein. PLoS One 2012; 7:e32180. [PMID: 22461884 PMCID: PMC3312879 DOI: 10.1371/journal.pone.0032180] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Accepted: 01/23/2012] [Indexed: 12/24/2022] Open
Abstract
“Hypomyelination and Congenital Cataract”, HCC (MIM #610532), is an autosomal recessive disorder characterized by congenital cataract and diffuse cerebral and peripheral hypomyelination. HCC is caused by deficiency of Hyccin, a protein whose biological role has not been clarified yet. Since the identification of the cell types expressing a protein of unknown function can contribute to define the physiological context in which the molecule is explicating its function, we analyzed the pattern of Hyccin expression in the central and peripheral nervous system (CNS and PNS). Using heterozygous mice expressing the b-galactosidase (LacZ) gene under control of the Hyccin gene regulatory elements, we show that the gene is primarily expressed in neuronal cells. Indeed, Hyccin-LacZ signal was identified in CA1 hippocampal pyramidal neurons, olfactory bulb, and cortical pyramidal neurons, while it did not colocalize with oligodendroglial or astrocytic markers. In the PNS, Hyccin was detectable only in axons isolated from newborn mice. In the brain, Hyccin transcript levels were higher in early postnatal development (postnatal days 2 and 10) and then declined in adult mice. In a model of active myelinogenesis, organotypic cultures of rat Schwann cells (SC)/Dorsal Root Ganglion (DRG) sensory neurons, Hyccin was detected along the neurites, while it was absent from SC. Intriguingly, the abundance of the molecule was upregulated at postnatal days 10 and 15, in the initial steps of myelinogenesis and then declined at 30 days when the process is complete. As Hyccin is primarily expressed in neurons and its mutation leads to hypomyelination in human patients, we suggest that the protein is involved in neuron-to-glia signalling to initiate or maintain myelination.
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Affiliation(s)
- Elisabetta Gazzerro
- Muscular and Neurodegenerative Disease Unit, G. Gaslini Institute, University of Genoa, Genoa, Italy.
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Falace A, Filipello F, La Padula V, Vanni N, Madia F, De Pietri Tonelli D, de Falco FA, Striano P, Dagna Bricarelli F, Minetti C, Benfenati F, Fassio A, Zara F. TBC1D24, an ARF6-interacting protein, is mutated in familial infantile myoclonic epilepsy. Am J Hum Genet 2010; 87:365-70. [PMID: 20727515 DOI: 10.1016/j.ajhg.2010.07.020] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2010] [Revised: 07/19/2010] [Accepted: 07/22/2010] [Indexed: 12/28/2022] Open
Abstract
Idiopathic epilepsies (IEs) are a group of disorders characterized by recurrent seizures in the absence of detectable brain lesions or metabolic abnormalities. IEs include common disorders with a complex mode of inheritance and rare Mendelian traits suggesting the occurrence of several alleles with variable penetrance. We previously described a large family with a recessive form of idiopathic epilepsy, named familial infantile myoclonic epilepsy (FIME), and mapped the disease locus on chromosome 16p13.3 by linkage analysis. In the present study, we found that two compound heterozygous missense mutations (D147H and A509V) in TBC1D24, a gene of unknown function, are responsible for FIME. In situ hybridization analysis revealed that Tbc1d24 is mainly expressed at the level of the cerebral cortex and the hippocampus. By coimmunoprecipitation assay we found that TBC1D24 binds ARF6, a Ras-related family of small GTPases regulating exo-endocytosis dynamics. The main recognized function of ARF6 in the nervous system is the regulation of dendritic branching, spine formation, and axonal extension. TBC1D24 overexpression resulted in a significant increase in neurite length and arborization and the FIME mutations significantly reverted this phenotype. In this study we identified a gene mutation involved in autosomal-recessive idiopathic epilepsy, unveiled the involvement of ARF6-dependent molecular pathway in brain hyperexcitability and seizures, and confirmed the emerging role of subtle cytoarchitectural alterations in the etiology of this group of common epileptic disorders.
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Affiliation(s)
- Antonio Falace
- Department of Neuroscience, Institute G. Gaslini and University of Genova, Italy.
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Grandis M, Vigo T, Passalacqua M, Jain M, Scazzola S, La Padula V, Brucal M, Benvenuto F, Nobbio L, Cadoni A, Mancardi GL, Kamholz J, Shy ME, Schenone A. Different cellular and molecular mechanisms for early and late-onset myelin protein zero mutations. Hum Mol Genet 2008; 17:1877-89. [PMID: 18337304 DOI: 10.1093/hmg/ddn083] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Mutations in the gene MPZ, encoding myelin protein zero (MPZ), cause inherited neuropathies collectively called Charcot-Marie-Tooth type 1B (CMT1B). Based on the age of onset, clinical and pathological features, most MPZ mutations are separable into two groups: one causing a severe, early-onset, demyelinating neuropathy and a second, causing a late-onset neuropathy with prominent axonal loss. To investigate potential pathomechanisms underlying the two phenotypes, we transiently transfected HeLa cells with two late-onset (T95M, H10P) and two early-onset (H52R, S22_W28 deletion) mutations and analyzed their effects on intracellular protein trafficking, glycosylation, cell viability and intercellular adhesion. We found that the two late-onset mutations were both transported to the cell membrane and moderately reduced MPZ-mediated intercellular adhesion. The two early-onset mutations caused two distinct abnormalities. H52R was correctly glycosylated and trafficked to the plasma membrane, but strongly affected intercellular adhesion. When co-expressed with wild-type MPZ (wtMPZ), a functional dominant negative effect was observed. Alternatively, S22_W28 deletion was retained within the cytoplasm and reduced both adhesion caused by wtMPZ and cellular viability. Since the same trafficking patterns were observed in transfected murine Schwann cells, they are not an artifact of heterologous cell expression. Our results suggest that at least some late-onset mutations cause a partial loss of function in the transfected cells, whereas multiple abnormal gain of function pathways can result in early-onset neuropathy. Further characterization of these pathways will lead to a better understanding of the pathogenesis of CMT1B and a rational basis for treating these debilitating inherited neuropathies.
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Affiliation(s)
- Marina Grandis
- Department of Neurosciences, Ophthalmology and Genetics, Universityof Genova, 16132 Genova, Italy.
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Niemann A, Ruegg M, La Padula V, Schenone A, Suter U. Ganglioside-induced differentiation associated protein 1 is a regulator of the mitochondrial network: new implications for Charcot-Marie-Tooth disease. J Cell Biol 2005; 170:1067-78. [PMID: 16172208 PMCID: PMC2171517 DOI: 10.1083/jcb.200507087] [Citation(s) in RCA: 329] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2005] [Accepted: 08/22/2005] [Indexed: 01/23/2023] Open
Abstract
Mutations in GDAP1 lead to severe forms of the peripheral motor and sensory neuropathy, Charcot-Marie-Tooth disease (CMT), which is characterized by heterogeneous phenotypes, including pronounced axonal damage and demyelination. We show that neurons and Schwann cells express ganglioside-induced differentiation associated protein 1 (GDAP1), which suggest that both cell types may contribute to the mixed features of the disease. GDAP1 is located in the mitochondrial outer membrane and regulates the mitochondrial network. Overexpression of GDAP1 induces fragmentation of mitochondria without inducing apoptosis, affecting overall mitochondrial activity, or interfering with mitochondrial fusion. The mitochondrial fusion proteins, mitofusin 1 and 2 and Drp1(K38A), can counterbalance the GDAP1-dependent fission. GDAP1-specific knockdown by RNA interference results in a tubular mitochondrial morphology. GDAP1 truncations that are found in patients who have CMT are not targeted to mitochondria and have lost mitochondrial fragmentation activity. The latter activity also is reduced strongly for disease-associated GDAP1 point mutations. Our data indicate that an exquisitely tight control of mitochondrial dynamics, regulated by GDAP1, is crucial for the proper function of myelinated peripheral nerves.
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Affiliation(s)
- Axel Niemann
- Institute of Cell Biology, Department of Biology, Swiss Federal Institute of Technology, ETH Hönggerberg, 8093 Zürich, Switzerland
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