1
|
Giraud Q, Spiegelhalter C, Messaddeq N, Laporte J. MTM1 overexpression prevents and reverts BIN1-related centronuclear myopathy. Brain 2023; 146:4158-4173. [PMID: 37490306 PMCID: PMC10545525 DOI: 10.1093/brain/awad251] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 06/30/2023] [Accepted: 07/06/2023] [Indexed: 07/26/2023] Open
Abstract
Centronuclear and myotubular myopathies (CNM) are rare and severe genetic diseases associated with muscle weakness and atrophy as well as intracellular disorganization of myofibres. The main mutated proteins control lipid and membrane dynamics and are the lipid phosphatase myotubularin (MTM1), and the membrane remodelling proteins amphiphysin 2 (BIN1) and dynamin 2 (DNM2). There is no available therapy. Here, to validate a novel therapeutic strategy for BIN1- and DNM2-CNM, we evaluated adeno-associated virus-mediated MTM1 (AAV-MTM1 ) overexpression in relevant mouse models. Early systemic MTM1 overexpression prevented the development of the CNM pathology in Bin1mck-/- mice, while late intramuscular MTM1 expression partially reverted the established phenotypes after only 4 weeks of treatment. However, AAV-MTM1 injection did not change the DNM2-CNM mouse phenotypes. We investigated the mechanism of the rescue of the myopathy in BIN1-CNM and found that the lipid phosphatase activity of MTM1 was essential for the rescue of muscle atrophy and myofibre hypotrophy but dispensable for the rescue of myofibre disorganization including organelle mis-position and T-tubule defects. Furthermore, the improvement of T-tubule organization correlated with normalization of key regulators of T-tubule morphogenesis, dysferlin and caveolin. Overall, these data support the inclusion of BIN1-CNM patients in an AAV-MTM1 clinical trial.
Collapse
Affiliation(s)
- Quentin Giraud
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404, Illkirch, France
| | - Coralie Spiegelhalter
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404, Illkirch, France
| | - Nadia Messaddeq
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404, Illkirch, France
| | - Jocelyn Laporte
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404, Illkirch, France
| |
Collapse
|
2
|
Gómez-Oca R, Edelweiss E, Djeddi S, Gerbier M, Massana-Muñoz X, Oulad-Abdelghani M, Crucifix C, Spiegelhalter C, Messaddeq N, Poussin-Courmontagne P, Koebel P, Cowling BS, Laporte J. Differential impact of ubiquitous and muscle dynamin 2 isoforms in muscle physiology and centronuclear myopathy. Nat Commun 2022; 13:6849. [PMID: 36369230 PMCID: PMC9652393 DOI: 10.1038/s41467-022-34490-4] [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: 09/06/2021] [Accepted: 10/27/2022] [Indexed: 11/13/2022] Open
Abstract
Dynamin 2 mechanoenzyme is a key regulator of membrane remodeling and gain-of-function mutations in its gene cause centronuclear myopathies. Here, we investigate the functions of dynamin 2 isoforms and their associated phenotypes and, specifically, the ubiquitous and muscle-specific dynamin 2 isoforms expressed in skeletal muscle. In cell-based assays, we show that a centronuclear myopathy-related mutation in the ubiquitous but not the muscle-specific dynamin 2 isoform causes increased membrane fission. In vivo, overexpressing the ubiquitous dynamin 2 isoform correlates with severe forms of centronuclear myopathy, while overexpressing the muscle-specific isoform leads to hallmarks seen in milder cases of the disease. Previous mouse studies suggested that reduction of the total dynamin 2 pool could be therapeutic for centronuclear myopathies. Here, dynamin 2 splice switching from muscle-specific to ubiquitous dynamin 2 aggravated the phenotype of a severe X-linked form of centronuclear myopathy caused by loss-of-function of the MTM1 phosphatase, supporting the importance of targeting the ubiquitous isoform for efficient therapy in muscle. Our results highlight that the ubiquitous and not the muscle-specific dynamin 2 isoform is the main modifier contributing to centronuclear myopathy pathology.
Collapse
Affiliation(s)
- Raquel Gómez-Oca
- grid.420255.40000 0004 0638 2716Dpt Translational Medicine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France ,Dynacure, Illkirch, France
| | - Evelina Edelweiss
- grid.420255.40000 0004 0638 2716Dpt Translational Medicine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | - Sarah Djeddi
- grid.420255.40000 0004 0638 2716Dpt Translational Medicine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | | | - Xènia Massana-Muñoz
- grid.420255.40000 0004 0638 2716Dpt Translational Medicine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | - Mustapha Oulad-Abdelghani
- grid.420255.40000 0004 0638 2716Core platforms, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | - Corinne Crucifix
- grid.420255.40000 0004 0638 2716Integrated Structural Biology platform, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | - Coralie Spiegelhalter
- grid.420255.40000 0004 0638 2716Core platforms, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | - Nadia Messaddeq
- grid.420255.40000 0004 0638 2716Core platforms, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | - Pierre Poussin-Courmontagne
- grid.420255.40000 0004 0638 2716Integrated Structural Biology platform, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | - Pascale Koebel
- grid.420255.40000 0004 0638 2716Core platforms, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | | | - Jocelyn Laporte
- grid.420255.40000 0004 0638 2716Dpt Translational Medicine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| |
Collapse
|
3
|
Ghoroghi S, Mary B, Larnicol A, Asokan N, Klein A, Osmani N, Busnelli I, Delalande F, Paul N, Halary S, Gros F, Fouillen L, Haeberle AM, Royer C, Spiegelhalter C, André-Grégoire G, Mittelheisser V, Detappe A, Murphy K, Timpson P, Carapito R, Blot-Chabaud M, Gavard J, Carapito C, Vitale N, Lefebvre O, Goetz JG, Hyenne V. Ral GTPases promote breast cancer metastasis by controlling biogenesis and organ targeting of exosomes. eLife 2021; 10:61539. [PMID: 33404012 PMCID: PMC7822591 DOI: 10.7554/elife.61539] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [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: 07/28/2020] [Accepted: 01/05/2021] [Indexed: 12/12/2022] Open
Abstract
Cancer extracellular vesicles (EVs) shuttle at distance and fertilize pre-metastatic niches facilitating subsequent seeding by tumor cells. However, the link between EV secretion mechanisms and their capacity to form pre-metastatic niches remains obscure. Using mouse models, we show that GTPases of the Ral family control, through the phospholipase D1, multi-vesicular bodies homeostasis and tune the biogenesis and secretion of pro-metastatic EVs. Importantly, EVs from RalA or RalB depleted cells have limited organotropic capacities in vivoand are less efficient in promoting metastasis. RalA and RalB reduce the EV levels of the adhesion molecule MCAM/CD146, which favors EV-mediated metastasis by allowing EVs targeting to the lungs. Finally, RalA, RalB, and MCAM/CD146, are factors of poor prognosis in breast cancer patients. Altogether, our study identifies RalGTPases as central molecules linking the mechanisms of EVs secretion and cargo loading to their capacity to disseminate and induce pre-metastatic niches in a CD146-dependent manner.
Collapse
Affiliation(s)
- Shima Ghoroghi
- INSERM UMR_S1109, Tumor Biomechanics, Strasbourg, France.,Université de Strasbourg, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Benjamin Mary
- INSERM UMR_S1109, Tumor Biomechanics, Strasbourg, France.,Université de Strasbourg, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Annabel Larnicol
- INSERM UMR_S1109, Tumor Biomechanics, Strasbourg, France.,Université de Strasbourg, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Nandini Asokan
- INSERM UMR_S1109, Tumor Biomechanics, Strasbourg, France.,Université de Strasbourg, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Annick Klein
- INSERM UMR_S1109, Tumor Biomechanics, Strasbourg, France.,Université de Strasbourg, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Naël Osmani
- INSERM UMR_S1109, Tumor Biomechanics, Strasbourg, France.,Université de Strasbourg, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Ignacio Busnelli
- INSERM UMR_S1109, Tumor Biomechanics, Strasbourg, France.,Université de Strasbourg, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - François Delalande
- Laboratoire de Spectrométrie de Masse BioOrganique (LSMBO), IPHC UMR 7178, CNRS, Université de Strasbourg, Strasbourg, France
| | - Nicodème Paul
- Université de Strasbourg, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France.,INSERM UMR_S1109, Genomax, Strasbourg, France
| | - Sébastien Halary
- CNRS, UMR 7245 MCAM, Muséum National d'Histoire Naturelle de Paris, Paris, France
| | - Frédéric Gros
- INSERM UMR_S1109, Tumor Biomechanics, Strasbourg, France.,Université de Strasbourg, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Laetitia Fouillen
- Université de Bordeaux, CNRS, Laboratoire de Biogenèse Membranaire, UMR 5200, Villenave d'Ornon, France
| | - Anne-Marie Haeberle
- Centre National de la Recherche Scientifique, Université de Strasbourg, Institut des Neurosciences Cellulaires et Intégratives, Strasbourg, France
| | - Cathy Royer
- Plateforme Imagerie In Vitro, CNRS UPS 3156, Strasbourg, France
| | - Coralie Spiegelhalter
- IGBMC Imaging Center CNRS (UMR7104)/ INSERM (U1258)/ Université de Strasbourg, Illkirch, France
| | - Gwennan André-Grégoire
- Team SOAP, CRCINA, INSERM, CNRS, Université de Nantes, Université d'Angers, Nantes, France.,Integrated Center for Oncology, ICO, St-Herblain, France
| | - Vincent Mittelheisser
- INSERM UMR_S1109, Tumor Biomechanics, Strasbourg, France.,Université de Strasbourg, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France.,Nanotranslational laboratory, Institut de Cancérologie Strasbourg Europe, Strasbourg, France
| | - Alexandre Detappe
- Nanotranslational laboratory, Institut de Cancérologie Strasbourg Europe, Strasbourg, France.,Équipe de synthèse pour l'analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC), UMR7178, CNRS/Université de Strasbourg, Strasbourg, France
| | - Kendelle Murphy
- Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia.,The Kinghorn Cancer Centre, Garvan Institute of Medical Research, Sydney, Australia
| | - Paul Timpson
- Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia.,The Kinghorn Cancer Centre, Garvan Institute of Medical Research, Sydney, Australia
| | - Raphaël Carapito
- Université de Strasbourg, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France.,INSERM UMR_S1109, Genomax, Strasbourg, France
| | | | - Julie Gavard
- Team SOAP, CRCINA, INSERM, CNRS, Université de Nantes, Université d'Angers, Nantes, France.,Integrated Center for Oncology, ICO, St-Herblain, France
| | - Christine Carapito
- Laboratoire de Spectrométrie de Masse BioOrganique (LSMBO), IPHC UMR 7178, CNRS, Université de Strasbourg, Strasbourg, France
| | - Nicolas Vitale
- Centre National de la Recherche Scientifique, Université de Strasbourg, Institut des Neurosciences Cellulaires et Intégratives, Strasbourg, France
| | - Olivier Lefebvre
- INSERM UMR_S1109, Tumor Biomechanics, Strasbourg, France.,Université de Strasbourg, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Jacky G Goetz
- INSERM UMR_S1109, Tumor Biomechanics, Strasbourg, France.,Université de Strasbourg, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Vincent Hyenne
- INSERM UMR_S1109, Tumor Biomechanics, Strasbourg, France.,Université de Strasbourg, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France.,CNRS SNC5055, Strasbourg, France
| |
Collapse
|
4
|
Peche GA, Spiegelhalter C, Silva-Rojas R, Laporte J, Böhm J. Functional analyses of STIM1 mutations reveal a common pathomechanism for tubular aggregate myopathy and Stormorken syndrome. Neuropathology 2020; 40:559-569. [PMID: 33073872 DOI: 10.1111/neup.12692] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 12/23/2019] [Revised: 05/01/2020] [Accepted: 05/18/2020] [Indexed: 11/30/2022]
Abstract
Tubular aggregate myopathy (TAM) is a progressive disorder characterized by muscle weakness, cramps, and myalgia. TAM clinically overlaps with Stormorken syndrome (STRMK), combining TAM with miosis, thrombocytopenia, hyposplenism, ichthyosis, short stature, and dyslexia. TAM and STRMK arise from gain-of-function mutations in STIM1 (stromal interaction molecule 1) or ORAI1, both encoding key regulators of Ca2+ homeostasis, and mutations in either gene result in excessive extracellular Ca2+ entry. The pathomechanistic similarities and differences between TAM and STRMK are only partially understood. Here we provide functional in vitro experiments demonstrating that STIM1 harboring the TAM D84G or the STRMK R304W mutation similarly cluster and exert a dominant effect on the wild-type protein. Both mutants recruit ORAI1 to the clusters, increase cytosolic Ca2+ levels, promote major nuclear import of the Ca2+ -dependent transcription factor NFAT (nuclear factor of activated T cells), and trigger the formation of circular membrane stacks. In conclusion, the analyzed TAM and STRMK mutations have a comparable impact on STIM1 protein function and downstream effects of excessive Ca2+ entry, highlighting that TAM and STRMK involve a common pathomechanism.
Collapse
Affiliation(s)
- Georges Arielle Peche
- Department of Translational Medicine and Neurogenetics, Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,University of Strasbourg, Illkirch, France
| | - Coralie Spiegelhalter
- Department of Translational Medicine and Neurogenetics, Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,University of Strasbourg, Illkirch, France
| | - Roberto Silva-Rojas
- Department of Translational Medicine and Neurogenetics, Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,University of Strasbourg, Illkirch, France
| | - Jocelyn Laporte
- Department of Translational Medicine and Neurogenetics, Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,University of Strasbourg, Illkirch, France
| | - Johann Böhm
- Department of Translational Medicine and Neurogenetics, Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,University of Strasbourg, Illkirch, France
| |
Collapse
|
5
|
Garcia AM, Giorgiutti C, El Khoury Y, Bauer V, Spiegelhalter C, Leize‐Wagner E, Hellwig P, Potier N, Torbeev V. Frontispiece: Aggregation and Amyloidogenicity of the Nuclear Coactivator Binding Domain of CREB‐Binding Protein. Chemistry 2020. [DOI: 10.1002/chem.202084471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ana Maria Garcia
- ISIS (Institut de Science et d'Ingénierie Supramoléculaires) and icFRC (International Center for Frontier Research in Chemistry) University of Strasbourg CNRS—UMR 7006 8 allée Gaspard Monge 67083 Strasbourg France
| | - Christophe Giorgiutti
- Laboratory of Mass-Spectrometry of Interactions and Systems University of Strasbourg CNRS—UMR 7140 1 rue Blaise Pascal 67070 Strasbourg France
| | - Youssef El Khoury
- Laboratory of Bioelectrochemistry and Spectroscopy University of Strasbourg CNRS—UMR 7140 1 rue Blaise Pascal 67070 Strasbourg France
| | - Valentin Bauer
- ISIS (Institut de Science et d'Ingénierie Supramoléculaires) and icFRC (International Center for Frontier Research in Chemistry) University of Strasbourg CNRS—UMR 7006 8 allée Gaspard Monge 67083 Strasbourg France
| | - Coralie Spiegelhalter
- Imaging Center, IGBMC (Institut de Génétique et de Biologie Moléculaire et Cellulaire) INSERM-U964, University of Strasbourg CNRS—UMR 7104 1 rue Laurent Fries 67404 Illkirch France
| | - Emmanuelle Leize‐Wagner
- Laboratory of Mass-Spectrometry of Interactions and Systems University of Strasbourg CNRS—UMR 7140 1 rue Blaise Pascal 67070 Strasbourg France
| | - Petra Hellwig
- Laboratory of Bioelectrochemistry and Spectroscopy University of Strasbourg CNRS—UMR 7140 1 rue Blaise Pascal 67070 Strasbourg France
- Institute for Advanced Study USIAS University of Strasbourg 5 allée du Général Rouvillois 67083 Strasbourg France
| | - Noelle Potier
- Laboratory of Mass-Spectrometry of Interactions and Systems University of Strasbourg CNRS—UMR 7140 1 rue Blaise Pascal 67070 Strasbourg France
| | - Vladimir Torbeev
- ISIS (Institut de Science et d'Ingénierie Supramoléculaires) and icFRC (International Center for Frontier Research in Chemistry) University of Strasbourg CNRS—UMR 7006 8 allée Gaspard Monge 67083 Strasbourg France
| |
Collapse
|
6
|
Garcia AM, Giorgiutti C, El Khoury Y, Bauer V, Spiegelhalter C, Leize-Wagner E, Hellwig P, Potier N, Torbeev V. Aggregation and Amyloidogenicity of the Nuclear Coactivator Binding Domain of CREB-Binding Protein. Chemistry 2020; 26:9889-9899. [PMID: 32364648 DOI: 10.1002/chem.202001847] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 04/30/2020] [Indexed: 12/28/2022]
Abstract
The nuclear coactivator binding domain (NCBD) of transcriptional co-regulator CREB-binding protein (CBP) is an example of conformationally malleable proteins that can bind to structurally unrelated protein targets and adopt distinct folds in the respective protein complexes. Here, we show that the folding landscape of NCBD contains an alternative pathway that results in protein aggregation and self-assembly into amyloid fibers. The initial steps of such protein misfolding are driven by intermolecular interactions of its N-terminal α-helix bringing multiple NCBD molecules into contact. These oligomers then undergo slow but progressive interconversion into β-sheet-containing aggregates. To reveal the concealed aggregation potential of NCBD we used a chemically synthesized mirror-image d-NCBD form. The addition of d-NCBD promoted self-assembly into amyloid precipitates presumably due to formation of thermodynamically more stable racemic β-sheet structures. The unexpected aggregation of NCBD needs to be taken into consideration given the multitude of protein-protein interactions and resulting biological functions mediated by CBP.
Collapse
Affiliation(s)
- Ana Maria Garcia
- ISIS (Institut de Science et d'Ingénierie Supramoléculaires) and, icFRC (International Center for Frontier Research in Chemistry), University of Strasbourg, CNRS-UMR 7006, 8 allée Gaspard Monge, 67083, Strasbourg, France
| | - Christophe Giorgiutti
- Laboratory of Mass-Spectrometry of Interactions and Systems, University of Strasbourg, CNRS-UMR 7140, 1 rue Blaise Pascal, 67070, Strasbourg, France
| | - Youssef El Khoury
- Laboratory of Bioelectrochemistry and Spectroscopy, University of Strasbourg, CNRS-UMR 7140, 1 rue Blaise Pascal, 67070, Strasbourg, France
| | - Valentin Bauer
- ISIS (Institut de Science et d'Ingénierie Supramoléculaires) and, icFRC (International Center for Frontier Research in Chemistry), University of Strasbourg, CNRS-UMR 7006, 8 allée Gaspard Monge, 67083, Strasbourg, France
| | - Coralie Spiegelhalter
- Imaging Center, IGBMC (Institut de Génétique et de Biologie Moléculaire et Cellulaire), INSERM-U964, University of Strasbourg, CNRS-UMR 7104, 1 rue Laurent Fries, 67404, Illkirch, France
| | - Emmanuelle Leize-Wagner
- Laboratory of Mass-Spectrometry of Interactions and Systems, University of Strasbourg, CNRS-UMR 7140, 1 rue Blaise Pascal, 67070, Strasbourg, France
| | - Petra Hellwig
- Laboratory of Bioelectrochemistry and Spectroscopy, University of Strasbourg, CNRS-UMR 7140, 1 rue Blaise Pascal, 67070, Strasbourg, France
- Institute for Advanced Study, USIAS University of Strasbourg, 5 allée du Général Rouvillois, 67083, Strasbourg, France
| | - Noelle Potier
- Laboratory of Mass-Spectrometry of Interactions and Systems, University of Strasbourg, CNRS-UMR 7140, 1 rue Blaise Pascal, 67070, Strasbourg, France
| | - Vladimir Torbeev
- ISIS (Institut de Science et d'Ingénierie Supramoléculaires) and, icFRC (International Center for Frontier Research in Chemistry), University of Strasbourg, CNRS-UMR 7006, 8 allée Gaspard Monge, 67083, Strasbourg, France
| |
Collapse
|
7
|
Casset A, Jouhannaud J, Garofalo A, Spiegelhalter C, Nguyen DV, Felder-Flesch D, Pourroy G, Pons F. Macrophage functionality and homeostasis in response to oligoethyleneglycol-coated IONPs: Impact of a dendritic architecture. Int J Pharm 2018; 556:287-300. [PMID: 30557682 DOI: 10.1016/j.ijpharm.2018.12.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 06/08/2018] [Revised: 11/29/2018] [Accepted: 12/06/2018] [Indexed: 12/20/2022]
Abstract
The engineering of iron oxide nanoparticles (IONPs) for biomedical use has received great interest over the past decade. In the present study we investigated the biocompatibility of IONPs grafted with linear (2P) or generation 1 (2PG1) or 2 (2PG2) dendronized oligoethyleneglycol units in THP-1-derived macrophages. To evaluate IONP effects on cell functionality and homeostasis, mitochondrial function (MTT assay), membrane permeability (LDH release), inflammation (IL-8), oxidative stress (reduced glutathione, GSH), NLRP3 inflammasome activation (IL-1β) and nanoparticle cellular uptake (intracellular iron content) were quantified after a 4-h or 24-h cell exposure to increasing IONP concentrations (0-300 µg Fe/mL). IONPs coated with a linear molecule, NP10COP@2P, were highly taken up by cells and induced significant dose-dependent IL-8 release, oxidative stress and NLRP3 inflammasome activation. In comparison, IONPs coated with dendrons of generation 1 (NP10COP@2PG1) and 2 (NP10COP@2PG2) exhibited better biocompatibility. Effect of the dendritic architecture of the surface coating was investigated in a kinetic experiment involving cell short-term exposure (30 min or 1 h 30) to the two dendronized IONPs. NP10COP@2PG2 disrupted cellular homeostasis (LDH release, IL-1β and IL-8 secretion) to a greater extend than NP10COP@2PG1, which makes this last IONP the best candidate as MRI contrast or theranostic agent.
Collapse
Affiliation(s)
- Anne Casset
- Université de Strasbourg, CNRS, CAMB UMR 7199, F-67000 Strasbourg, France.
| | - Julien Jouhannaud
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux Strasbourg, UMR 7504, F-67000 Strasbourg, France
| | - Antonio Garofalo
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux Strasbourg, UMR 7504, F-67000 Strasbourg, France
| | - Coralie Spiegelhalter
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM, CNRS, Université de Strasbourg, F-67404 Illkirch, France
| | - Dinh-Vu Nguyen
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux Strasbourg, UMR 7504, F-67000 Strasbourg, France
| | - Delphine Felder-Flesch
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux Strasbourg, UMR 7504, F-67000 Strasbourg, France
| | - Geneviève Pourroy
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux Strasbourg, UMR 7504, F-67000 Strasbourg, France
| | - Françoise Pons
- Université de Strasbourg, CNRS, CAMB UMR 7199, F-67000 Strasbourg, France
| |
Collapse
|
8
|
Lysova I, Spiegelhalter C, Réal E, Zgheib S, Anton H, Mély Y. ReAsH/tetracystein-based correlative light-electron microscopy for HIV-1 imaging during the early stages of infection. Methods Appl Fluoresc 2018; 6:045001. [PMID: 29938685 DOI: 10.1088/2050-6120/aacec1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Visualization of viruses in the host cell during the course of infection by correlative light-electron microscopy (CLEM) requires a specific labelling of the viral structures in order to recognize the nanometric viral cores in the intracellular environment. For Human immunodeficiency virus type 1 (HIV-1), the labelling approaches developed for fluorescence microscopy are generally not suited for transmission electron microscopy (TEM), so that imaging of HIV-1 particles in infected cells by CLEM is not straightforward. Herein, we adapt the labeling approach with a tetracystein tag (TC) and a biarsenical resorufin-based label (ReAsH) for monitoring the HIV-1 particles during the early stages of HIV-1 infection by CLEM. In this approach, the ReAsH fluorophore triggers the photo-conversion of 3,3-diaminobenzidine tetrahydrochloride (DAB), generating a precipitate sensitive to osmium tetroxide staining that can be visualized by transmission electron microscopy. The TC tag is fused to the nucleocapsid protein NCp7, a nucleic acid chaperone that binds to the viral genome. HeLa cells, infected by ReAsH-labeled pseudoviruses containg NCp7-TC proteins exhibit strong fluorescent cytoplasmic spots that overlap with dark precipitates in the TEM sections. The DAB precipitates corresponding to single viral cores are observed all over the cytoplasm, and notably near microtubules and nuclear pores. This work describes for the first time a specific contrast given by HIV-1 viral proteins in TEM images and opens new perspectives for the use of CLEM to monitor the intracellular traffic of viral complexes.
Collapse
Affiliation(s)
- Iryna Lysova
- Laboratoire de Bioimagerie et Pathologies, CNRS UMR 7021, Strasbourg University, Faculty of Pharmacy, 74 route du Rhin, Illkirch, France
| | | | | | | | | | | |
Collapse
|
9
|
Quinault A, Leloup C, Denwood G, Spiegelhalter C, Rodriguez M, Lefebvre P, Messaddeq N, Zhang Q, Dacquet C, Pénicaud L, Collins SC. Modulation of large dense core vesicle insulin content mediates rhythmic hormone release from pancreatic beta cells over the 24h cycle. PLoS One 2018; 13:e0193882. [PMID: 29543849 PMCID: PMC5854349 DOI: 10.1371/journal.pone.0193882] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 11/29/2017] [Accepted: 02/20/2018] [Indexed: 11/19/2022] Open
Abstract
The rhythmic nature of insulin secretion over the 24h cycle in pancreatic islets has been mostly investigated using transcriptomics studies showing that modulation of insulin secretion over this cycle is achieved via distal stages of insulin secretion. We set out to measure β-cell exocytosis using in depth cell physiology techniques at several time points. In agreement with the activity and feeding pattern of nocturnal rodents, we find that C57/Bl6J islets in culture for 24h exhibit higher insulin secretion during the corresponding dark phase than in the light phase (Zeitgeber Time ZT20 and ZT8, respectively, in vivo). Glucose-induced insulin secretion is increased by 21% despite normal intracellular Ca2+ transients and depolarization-evoked exocytosis, as measured by whole-cell capacitance measurements. This paradox is explained by a 1.37-fold increase in beta cell insulin content. Ultramorphological analyses show that vesicle size and density are unaltered, demonstrating that intravesicular insulin content per granule is modulated over the 24h cycle. Proinsulin levels did not change between ZT8 and ZT20. Islet glucagon content was inversely proportional to insulin content indicating that this unique feature is likely to support a physiological role. Microarray data identified the differential expression of 301 transcripts, of which 26 are miRNAs and 54 are known genes (including C2cd4b, a gene previously involved in insulin processing, and clock genes such as Bmal1 and Rev-erbα). Mouse β-cell secretion over the full course of the 24h cycle may rely on several distinct cellular functions but late night increase in insulin secretion depends solely on granule insulin content.
Collapse
Affiliation(s)
- Aurore Quinault
- CSGA, AgroSup Dijon, Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, Université de Bourgogne Franche-Comté, 9E Boulevard Jeanne d'Arc, Dijon, France
| | - Corinne Leloup
- CSGA, AgroSup Dijon, Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, Université de Bourgogne Franche-Comté, 9E Boulevard Jeanne d'Arc, Dijon, France
| | - Geoffrey Denwood
- Oxford Centre for Diabetes, Endocrinology and Metabolism, Churchill Hospital, University of Oxford, Headington, Oxford, United Kingdom
| | | | - Marianne Rodriguez
- Metabolism Discovery Research Pole of Therapeutical innovation Institut de Recherche Servier, 11 rue des Moulineaux Suresnes, France
| | - Philippe Lefebvre
- European Genomic Institute for Diabetes and UMR 1011 Inserm Université Nord de France-Institut Pasteur de Lille, Boulevard du Professeur Leclerc, Lille, France
| | | | - Quan Zhang
- Oxford Centre for Diabetes, Endocrinology and Metabolism, Churchill Hospital, University of Oxford, Headington, Oxford, United Kingdom
| | - Catherine Dacquet
- Biotechnology and Biomarker Research, Institut de Recherche Servier, 125 Chemin de Ronde, Croissy sur Seine, France
| | - Luc Pénicaud
- CSGA, AgroSup Dijon, Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, Université de Bourgogne Franche-Comté, 9E Boulevard Jeanne d'Arc, Dijon, France
| | - Stephan C. Collins
- CSGA, AgroSup Dijon, Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, Université de Bourgogne Franche-Comté, 9E Boulevard Jeanne d'Arc, Dijon, France
- IGBMC, 1 Rue Laurent Fries, Illkirch-Graffenstaden, France
- * E-mail:
| |
Collapse
|
10
|
Hyenne V, Apaydin A, Rodriguez D, Spiegelhalter C, Hoff-Yoessle S, Diem M, Tak S, Lefebvre O, Schwab Y, Goetz JG, Labouesse M. RAL-1 controls multivesicular body biogenesis and exosome secretion. J Cell Biol 2016; 211:27-37. [PMID: 26459596 PMCID: PMC4602040 DOI: 10.1083/jcb.201504136] [Citation(s) in RCA: 160] [Impact Index Per Article: 20.0] [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] [Indexed: 12/13/2022] Open
Abstract
Exosomes are secreted vesicles arising from the fusion of multivesicular bodies (MVBs) with the plasma membrane. Despite their importance in various processes, the molecular mechanisms controlling their formation and release remain unclear. Using nematodes and mammary tumor cells, we show that Ral GTPases are involved in exosome biogenesis. In Caenorhabditis elegans, RAL-1 localizes at the surface of secretory MVBs. A quantitative electron microscopy analysis of RAL-1-deficient animals revealed that RAL-1 is involved in both MVB formation and their fusion with the plasma membrane. These functions do not involve the exocyst complex, a common Ral guanosine triphosphatase (GTPase) effector. Furthermore, we show that the target membrane SNARE protein SYX-5 colocalizes with a constitutively active form of RAL-1 at the plasma membrane, and MVBs accumulate under the plasma membrane when SYX-5 is absent. In mammals, RalA and RalB are both required for the secretion of exosome-like vesicles in cultured cells. Therefore, Ral GTPases represent new regulators of MVB formation and exosome release.
Collapse
Affiliation(s)
- Vincent Hyenne
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Development and Stem Cells Program, Centre National de la Recherche Scientifique (UMR7104), Institut National de la Santé et de la Recherche Médicale (U964), Université de Strasbourg, 67400 Illkirch, France MN3T, Institut National de la Santé et de la Recherche Médicale (U1109), LabEx Medalis, Université de Strasbourg, 67200 Strasbourg, France Fédération de Médecine Translationnelle de Strasbourg, 67200 Strasbourg, France
| | - Ahmet Apaydin
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Development and Stem Cells Program, Centre National de la Recherche Scientifique (UMR7104), Institut National de la Santé et de la Recherche Médicale (U964), Université de Strasbourg, 67400 Illkirch, France
| | - David Rodriguez
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Development and Stem Cells Program, Centre National de la Recherche Scientifique (UMR7104), Institut National de la Santé et de la Recherche Médicale (U964), Université de Strasbourg, 67400 Illkirch, France
| | - Coralie Spiegelhalter
- Institut de Génétique et de Biologie Moléculaire et Cellulaire Imaging Center, Centre National de la Recherche Scientifique (UMR7104), Institut National de la Santé et de la Recherche Médicale (U964), Université de Strasbourg, 67400 Illkirch, France
| | - Sarah Hoff-Yoessle
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Development and Stem Cells Program, Centre National de la Recherche Scientifique (UMR7104), Institut National de la Santé et de la Recherche Médicale (U964), Université de Strasbourg, 67400 Illkirch, France
| | - Maxime Diem
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Development and Stem Cells Program, Centre National de la Recherche Scientifique (UMR7104), Institut National de la Santé et de la Recherche Médicale (U964), Université de Strasbourg, 67400 Illkirch, France
| | - Saurabh Tak
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Development and Stem Cells Program, Centre National de la Recherche Scientifique (UMR7104), Institut National de la Santé et de la Recherche Médicale (U964), Université de Strasbourg, 67400 Illkirch, France
| | - Olivier Lefebvre
- MN3T, Institut National de la Santé et de la Recherche Médicale (U1109), LabEx Medalis, Université de Strasbourg, 67200 Strasbourg, France Fédération de Médecine Translationnelle de Strasbourg, 67200 Strasbourg, France
| | - Yannick Schwab
- Institut de Génétique et de Biologie Moléculaire et Cellulaire Imaging Center, Centre National de la Recherche Scientifique (UMR7104), Institut National de la Santé et de la Recherche Médicale (U964), Université de Strasbourg, 67400 Illkirch, France Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, 69117 Heidelberg, Germany
| | - Jacky G Goetz
- MN3T, Institut National de la Santé et de la Recherche Médicale (U1109), LabEx Medalis, Université de Strasbourg, 67200 Strasbourg, France Fédération de Médecine Translationnelle de Strasbourg, 67200 Strasbourg, France
| | - Michel Labouesse
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Development and Stem Cells Program, Centre National de la Recherche Scientifique (UMR7104), Institut National de la Santé et de la Recherche Médicale (U964), Université de Strasbourg, 67400 Illkirch, France Institut de Biologie Paris (UMR7622), UPMC, 75005 Paris, France
| |
Collapse
|
11
|
Ramspacher C, Steed E, Boselli F, Ferreira R, Faggianelli N, Roth S, Spiegelhalter C, Messaddeq N, Trinh L, Liebling M, Chacko N, Tessadori F, Bakkers J, Laporte J, Hnia K, Vermot J. Developmental Alterations in Heart Biomechanics and Skeletal Muscle Function in Desmin Mutants Suggest an Early Pathological Root for Desminopathies. Cell Rep 2015; 11:1564-76. [PMID: 26051936 DOI: 10.1016/j.celrep.2015.05.010] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 04/03/2015] [Accepted: 05/05/2015] [Indexed: 11/25/2022] Open
Abstract
Desminopathies belong to a family of muscle disorders called myofibrillar myopathies that are caused by Desmin mutations and lead to protein aggregates in muscle fibers. To date, the initial pathological steps of desminopathies and the impact of desmin aggregates in the genesis of the disease are unclear. Using live, high-resolution microscopy, we show that Desmin loss of function and Desmin aggregates promote skeletal muscle defects and alter heart biomechanics. In addition, we show that the calcium dynamics associated with heart contraction are impaired and are associated with sarcoplasmic reticulum dilatation as well as abnormal subcellular distribution of Ryanodine receptors. Our results demonstrate that desminopathies are associated with perturbed excitation-contraction coupling machinery and that aggregates are more detrimental than Desmin loss of function. Additionally, we show that pharmacological inhibition of aggregate formation and Desmin knockdown revert these phenotypes. Our data suggest alternative therapeutic approaches and further our understanding of the molecular determinants modulating Desmin aggregate formation.
Collapse
Affiliation(s)
- Caroline Ramspacher
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U964, 67404 Illkirch, France; Université de Strasbourg, 67404 Illkirch, France
| | - Emily Steed
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U964, 67404 Illkirch, France; Université de Strasbourg, 67404 Illkirch, France
| | - Francesco Boselli
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U964, 67404 Illkirch, France; Université de Strasbourg, 67404 Illkirch, France
| | - Rita Ferreira
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U964, 67404 Illkirch, France; Université de Strasbourg, 67404 Illkirch, France
| | - Nathalie Faggianelli
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U964, 67404 Illkirch, France; Université de Strasbourg, 67404 Illkirch, France
| | - Stéphane Roth
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U964, 67404 Illkirch, France; Université de Strasbourg, 67404 Illkirch, France
| | - Coralie Spiegelhalter
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U964, 67404 Illkirch, France; Université de Strasbourg, 67404 Illkirch, France
| | - Nadia Messaddeq
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U964, 67404 Illkirch, France; Université de Strasbourg, 67404 Illkirch, France
| | - Le Trinh
- Molecular and Computational Biology, University of Southern California, Los Angeles, CA 90089, USA
| | - Michael Liebling
- Department of Electrical and Computer Engineering, University of California Santa Barbara, Santa Barbara, CA 93106, USA
| | - Nikhil Chacko
- Department of Electrical and Computer Engineering, University of California Santa Barbara, Santa Barbara, CA 93106, USA
| | - Federico Tessadori
- Hubrecht Institute-KNAW and University Medical Center Utrecht, Utrecht 3584 CT, the Netherlands
| | - Jeroen Bakkers
- Hubrecht Institute-KNAW and University Medical Center Utrecht, Utrecht 3584 CT, the Netherlands
| | - Jocelyn Laporte
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U964, 67404 Illkirch, France; Université de Strasbourg, 67404 Illkirch, France
| | - Karim Hnia
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U964, 67404 Illkirch, France; Université de Strasbourg, 67404 Illkirch, France
| | - Julien Vermot
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France; Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U964, 67404 Illkirch, France; Université de Strasbourg, 67404 Illkirch, France.
| |
Collapse
|
12
|
Goginashvili A, Zhang Z, Erbs E, Spiegelhalter C, Kessler P, Mihlan M, Pasquier A, Krupina K, Schieber N, Cinque L, Morvan J, Sumara I, Schwab Y, Settembre C, Ricci R. Insulin secretory granules control autophagy in pancreatic cells. Science 2015; 347:878-82. [DOI: 10.1126/science.aaa2628] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
13
|
Bošković A, Eid A, Pontabry J, Ishiuchi T, Spiegelhalter C, Raghu Ram EVS, Meshorer E, Torres-Padilla ME. Higher chromatin mobility supports totipotency and precedes pluripotency in vivo. Genes Dev 2014; 28:1042-7. [PMID: 24831699 PMCID: PMC4035533 DOI: 10.1101/gad.238881.114] [Citation(s) in RCA: 123] [Impact Index Per Article: 12.3] [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] [Indexed: 11/24/2022]
Abstract
Torres-Padilla and colleagues investigate the chromatin-based mechanisms behind the transition from totipotency to pluripotency in the developing mouse embryo. Tracking histone dynamics by FRAP in vivo reveals that core histone mobility decreases as development proceeds, defining different cellular states (totipotency, pluripotency, and differentiation). Strikingly, totipotent cells in vitro display the same high chromatin mobility as totipotent cells in the embryo. The data suggest that changes in chromatin dynamics underlie the transitions in cellular plasticity and that higher chromatin mobility is at the nuclear foundations of totipotency. The fusion of the gametes upon fertilization results in the formation of a totipotent cell. Embryonic chromatin is expected to be able to support a large degree of plasticity. However, whether this plasticity relies on a particular conformation of the embryonic chromatin is unknown. Moreover, whether chromatin plasticity is functionally linked to cellular potency has not been addressed. Here, we adapted fluorescence recovery after photobleaching (FRAP) in the developing mouse embryo and show that mobility of the core histones H2A, H3.1, and H3.2 is unusually high in two-cell stage embryos and decreases as development proceeds. The transition toward pluripotency is accompanied by a decrease in histone mobility, and, upon lineage allocation, pluripotent cells retain higher mobility than the differentiated trophectoderm. Importantly, totipotent two-cell-like embryonic stem cells also display high core histone mobility, implying that reprogramming toward totipotency entails changes in chromatin mobility. Our data suggest that changes in chromatin dynamics underlie the transitions in cellular plasticity and that higher chromatin mobility is at the nuclear foundations of totipotency.
Collapse
Affiliation(s)
- Ana Bošković
- CNRS/INSERM U964, Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire, F-67404 Illkirch, France
| | - André Eid
- CNRS/INSERM U964, Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire, F-67404 Illkirch, France
| | - Julien Pontabry
- CNRS/INSERM U964, Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire, F-67404 Illkirch, France
| | - Takashi Ishiuchi
- CNRS/INSERM U964, Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire, F-67404 Illkirch, France
| | - Coralie Spiegelhalter
- CNRS/INSERM U964, Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire, F-67404 Illkirch, France
| | - Edupuganti V S Raghu Ram
- Department of Genetics, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Eran Meshorer
- Department of Genetics, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Maria-Elena Torres-Padilla
- CNRS/INSERM U964, Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire, F-67404 Illkirch, France
| |
Collapse
|
14
|
Alpy F, Rousseau A, Schwab Y, Legueux F, Stoll I, Wendling C, Spiegelhalter C, Kessler P, Mathelin C, Rio MC, Levine TP, Tomasetto C. STARD3 or STARD3NL and VAP form a novel molecular tether between late endosomes and the ER. J Cell Sci 2013; 126:5500-12. [PMID: 24105263 DOI: 10.1242/jcs.139295] [Citation(s) in RCA: 171] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Inter-organelle membrane contacts sites (MCSs) are specific subcellular regions favoring the exchange of metabolites and information. We investigated the potential role of the late-endosomal membrane-anchored proteins StAR related lipid transfer domain-3 (STARD3) and STARD3 N-terminal like (STARD3NL) in the formation of MCSs involving late-endosomes (LEs). We demonstrate that both STARD3 and STARD3NL create MCSs between LEs and the endoplasmic reticulum (ER). STARD3 and STARD3NL use a conserved two phenylalanines in an acidic tract (FFAT)-motif to interact with ER-anchored VAP proteins. Together, they form an LE-ER tethering complex allowing heterologous membrane apposition. This LE-ER tethering complex affects organelle dynamics by altering the formation of endosomal tubules. An in situ proximity ligation assay between STARD3, STARD3NL and VAP proteins identified endogenous LE-ER MCS. Thus, we report here the identification of proteins involved in inter-organellar interaction.
Collapse
Affiliation(s)
- Fabien Alpy
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Functional Genomics and Cancer Department, 1 rue Laurent Fries, Illkirch, 67404, France
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Lenormand C, Spiegelhalter C, Cinquin B, Bardin S, Bausinger H, Angénieux C, Eckly A, Proamer F, Wall D, Lich B, Tourne S, Hanau D, Schwab Y, Salamero J, de la Salle H. Birbeck granule-like "organized smooth endoplasmic reticulum" resulting from the expression of a cytoplasmic YFP-tagged langerin. PLoS One 2013; 8:e60813. [PMID: 23577166 PMCID: PMC3618057 DOI: 10.1371/journal.pone.0060813] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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: 06/28/2012] [Accepted: 03/04/2013] [Indexed: 11/22/2022] Open
Abstract
Langerin is required for the biogenesis of Birbeck granules (BGs), the characteristic organelles of Langerhans cells. We previously used a Langerin-YFP fusion protein having a C-terminal luminal YFP tag to dynamically decipher the molecular and cellular processes which accompany the traffic of Langerin. In order to elucidate the interactions of Langerin with its trafficking effectors and their structural impact on the biogenesis of BGs, we generated a YFP-Langerin chimera with an N-terminal, cytosolic YFP tag. This latter fusion protein induced the formation of YFP-positive large puncta. Live cell imaging coupled to a fluorescence recovery after photobleaching approach showed that this coalescence of proteins in newly formed compartments was static. In contrast, the YFP-positive structures present in the pericentriolar region of cells expressing Langerin-YFP chimera, displayed fluorescent recovery characteristics compatible with active membrane exchanges. Using correlative light-electron microscopy we showed that the coalescent structures represented highly organized stacks of membranes with a pentalaminar architecture typical of BGs. Continuities between these organelles and the rough endoplasmic reticulum allowed us to identify the stacks of membranes as a form of “Organized Smooth Endoplasmic Reticulum” (OSER), with distinct molecular and physiological properties. The involvement of homotypic interactions between cytoplasmic YFP molecules was demonstrated using an A206K variant of YFP, which restored most of the Langerin traffic and BG characteristics observed in Langerhans cells. Mutation of the carbohydrate recognition domain also blocked the formation of OSER. Hence, a “double-lock” mechanism governs the behavior of YFP-Langerin, where asymmetric homodimerization of the YFP tag and homotypic interactions between the lectin domains of Langerin molecules participate in its retention and the subsequent formation of BG-like OSER. These observations confirm that BG-like structures appear wherever Langerin accumulates and confirm that membrane trafficking effectors dictate their physiology and, illustrate the importance of molecular interactions in the architecture of intracellular membranes.
Collapse
Affiliation(s)
- Cédric Lenormand
- Unité Mixte de Recherche Santé 725, Institut National de la Santé et de la Recherche Médicale, Strasbourg, France
- Université de Strasbourg, Strasbourg, France
- Histocompatibility Laboratory, Etablissement Français du Sang-Alsace, Strasbourg, France
| | - Coralie Spiegelhalter
- Imaging Centre, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
| | - Bertrand Cinquin
- Molecular Mechanisms of Intracellular Transport Laboratory, Unité Mixte de Recherche 144 Centre National de la Recherche Scientifique-Institut Curie, Paris, France
- Cell and Tissue Imaging Facility, BioImaging Cell-Institut Curie and Tissue Core Facility & Nikon Imaging Center, Unité Mixte de Recherche 144 Centre National de la Recherche Scientifique-Institut Curie, Paris, France
- Soleil Synchrotron, Gif-sur-Yvette, France
| | - Sabine Bardin
- Molecular Mechanisms of Intracellular Transport Laboratory, Unité Mixte de Recherche 144 Centre National de la Recherche Scientifique-Institut Curie, Paris, France
| | - Huguette Bausinger
- Unité Mixte de Recherche Santé 725, Institut National de la Santé et de la Recherche Médicale, Strasbourg, France
- Université de Strasbourg, Strasbourg, France
- Histocompatibility Laboratory, Etablissement Français du Sang-Alsace, Strasbourg, France
| | - Catherine Angénieux
- Unité Mixte de Recherche Santé 725, Institut National de la Santé et de la Recherche Médicale, Strasbourg, France
- Université de Strasbourg, Strasbourg, France
- Histocompatibility Laboratory, Etablissement Français du Sang-Alsace, Strasbourg, France
| | - Anita Eckly
- Unité Mixte de Recherche Santé 725, Institut National de la Santé et de la Recherche Médicale, Strasbourg, France
- Université de Strasbourg, Strasbourg, France
- Unité Mixte de Recherche Santé 949, Institut National de la Santé et de la Recherche Médicale, Strasbourg, France
| | - Fabienne Proamer
- Unité Mixte de Recherche Santé 725, Institut National de la Santé et de la Recherche Médicale, Strasbourg, France
- Université de Strasbourg, Strasbourg, France
- Histocompatibility Laboratory, Etablissement Français du Sang-Alsace, Strasbourg, France
| | | | - Ben Lich
- FEI Company, Eindhoven, The Netherlands
| | - Sylvie Tourne
- Histocompatibility Laboratory, Etablissement Français du Sang-Alsace, Strasbourg, France
| | - Daniel Hanau
- Unité Mixte de Recherche Santé 725, Institut National de la Santé et de la Recherche Médicale, Strasbourg, France
- Université de Strasbourg, Strasbourg, France
- Histocompatibility Laboratory, Etablissement Français du Sang-Alsace, Strasbourg, France
| | - Yannick Schwab
- Imaging Centre, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
| | - Jean Salamero
- Molecular Mechanisms of Intracellular Transport Laboratory, Unité Mixte de Recherche 144 Centre National de la Recherche Scientifique-Institut Curie, Paris, France
- Cell and Tissue Imaging Facility, BioImaging Cell-Institut Curie and Tissue Core Facility & Nikon Imaging Center, Unité Mixte de Recherche 144 Centre National de la Recherche Scientifique-Institut Curie, Paris, France
| | - Henri de la Salle
- Unité Mixte de Recherche Santé 725, Institut National de la Santé et de la Recherche Médicale, Strasbourg, France
- Université de Strasbourg, Strasbourg, France
- Histocompatibility Laboratory, Etablissement Français du Sang-Alsace, Strasbourg, France
- * E-mail:
| |
Collapse
|
16
|
Laverny G, Casset A, Purohit A, Schaeffer E, Spiegelhalter C, de Blay F, Pons F. Immunomodulatory properties of multi-walled carbon nanotubes in peripheral blood mononuclear cells from healthy subjects and allergic patients. Toxicol Lett 2012; 217:91-101. [PMID: 23266719 DOI: 10.1016/j.toxlet.2012.12.008] [Citation(s) in RCA: 42] [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] [Received: 03/08/2012] [Revised: 12/11/2012] [Accepted: 12/12/2012] [Indexed: 12/19/2022]
Abstract
In the present study, we investigated the immunomodulatory activity of multi-walled carbon nanotubes (MWCNTs) in peripheral blood mononuclear cells (PBMCs) from healthy donors and mite-allergic subjects. Freshly prepared PBMCs, stimulated or not with Toll-like receptor (TLR)1-9 agonists, a T cell mitogen (phytohemagglutinin A) or mite allergen extract were cultured in the presence or absence of MWCNTs. Secretion of TNF-α, IL-2, IL-5, IL-6, IL-12/23p40 or IFN-γ was quantified in the culture supernatants by ELISA. Basal secretion of all the cytokines was not altered by MWCNTs in PBMCs from both healthy donors and allergic subjects. In PBMCs from healthy donors, TNF-α, IL-6 and IL-12/23p40 secretion in response to the TLR4 agonist, lipopolysaccharide was however increased in a dose-dependent manner by MWCNTs. Significant increases in the release of these cytokines were also observed in PBMCs stimulated with a TLR2 or TLR3 agonist. MWCNTs also increased the release of IL-2 and IFN-γ by PBMCs stimulated with a T cell mitogen. In contrast, MWCNTs inhibited allergen-induced IL-5 secretion by PBMCs from mite-allergic subjects. As well, MWCNTs altered the capacity of PBMC-derived monocytes to differentiate into functional dendritic cells. All together, our data suggest that according to its immune cell target, MWCNTs may either promote or suppress immune responses in humans. Further investigations are necessary to fully understand the complexity behind interactions of engineered nanoparticles with the immune system.
Collapse
Affiliation(s)
- Gilles Laverny
- Laboratoire de Conception et Application de Molécules Bioactives, CNRS-Université de Strasbourg, Faculté de Pharmacie, Illkirch, France
| | | | | | | | | | | | | |
Collapse
|
17
|
Daguenet E, Baguet A, Degot S, Schmidt U, Alpy F, Wendling C, Spiegelhalter C, Kessler P, Rio MC, Le Hir H, Bertrand E, Tomasetto C. Perispeckles are major assembly sites for the exon junction core complex. Mol Biol Cell 2012; 23:1765-82. [PMID: 22419818 PMCID: PMC3338441 DOI: 10.1091/mbc.e12-01-0040] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [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] [Indexed: 11/11/2022] Open
Abstract
The exon junction complex (EJC) allows the spliceosome to communicate with other cellular machinery. This study shows that assembled EJC cores are enriched in nuclear regions around speckles, called perispeckles. Speckles and perispeckles may represent specialized nuclear regions for messenger ribonucleoprotein maturation. The exon junction complex (EJC) is loaded onto mRNAs as a consequence of splicing and regulates multiple posttranscriptional events. MLN51, Magoh, Y14, and eIF4A3 form a highly stable EJC core, but where this tetrameric complex is assembled in the cell remains unclear. Here we show that EJC factors are enriched in domains that we term perispeckles and are visible as doughnuts around nuclear speckles. Fluorescence resonance energy transfer analyses and EJC assembly mutants show that perispeckles do not store free subunits, but instead are enriched for assembled cores. At the ultrastructural level, perispeckles are distinct from interchromatin granule clusters that may function as storage sites for splicing factors and intermingle with perichromatin fibrils, where nascent RNAs and active RNA Pol II are present. These results support a model in which perispeckles are major assembly sites for the tetrameric EJC core. This subnuclear territory thus represents an intermediate region important for mRNA maturation, between transcription sites and splicing factor reservoirs and assembly sites.
Collapse
Affiliation(s)
- Elisabeth Daguenet
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Unité Mixte de Recherche 7104, Centre National de la Recherche Scientifique/U964 Institut National de Santé et de Recherche Médicale/Université de Strasbourg, 67404 Illkirch, France
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Ronzani C, Spiegelhalter C, Vonesch JL, Lebeau L, Pons F. Lung deposition and toxicological responses evoked by multi-walled carbon nanotubes dispersed in a synthetic lung surfactant in the mouse. Arch Toxicol 2011; 86:137-49. [DOI: 10.1007/s00204-011-0741-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Accepted: 07/18/2011] [Indexed: 10/17/2022]
|