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Santin Y, Formoso K, Haidar F, Fuentes MDPO, Bourgailh F, Hifdi N, Hnia K, Doghri Y, Resta J, Champigny C, Lechevallier S, Détrait M, Cousin G, Bisserier M, Parini A, Lezoualc'h F, Verelst M, Mialet-Perez J. Inhalation of acidic nanoparticles prevents doxorubicin cardiotoxicity through improvement of lysosomal function. Theranostics 2023; 13:5435-5451. [PMID: 37908733 PMCID: PMC10614672 DOI: 10.7150/thno.86310] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 08/04/2023] [Indexed: 11/02/2023] Open
Abstract
Doxorubicin (Dox) is an effective anticancer molecule, but its clinical efficacy is limited by strong cardiotoxic side effects. Lysosomal dysfunction has recently been proposed as a new mechanism of Dox-induced cardiomyopathy. However, to date, there is a paucity of therapeutic approaches capable of restoring lysosomal acidification and function in the heart. Methods: We designed novel poly(lactic-co-glycolic acid) (PLGA)-grafted silica nanoparticles (NPs) and investigated their therapeutic potential in the primary prevention of Dox cardiotoxicity in cardiomyocytes and mice. Results: We showed that NPs-PLGA internalized rapidly in cardiomyocytes and accumulated inside the lysosomes. Mechanistically, NPs-PLGA restored lysosomal acidification in the presence of doxorubicin or bafilomycin A1, thereby improving lysosomal function and autophagic flux. Importantly, NPs-PLGA mitigated Dox-related mitochondrial dysfunction and oxidative stress, two main mechanisms of cardiotoxicity. In vivo, inhalation of NPs-PLGA led to effective and rapid targeting of the myocardium, which prevented Dox-induced adverse remodeling and cardiac dysfunction in mice. Conclusion: Our findings demonstrate a pivotal role for lysosomal dysfunction in Dox-induced cardiomyopathy and highlight for the first time that pulmonary-driven NPs-PLGA administration is a promising strategy against anthracycline cardiotoxicity.
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Affiliation(s)
- Yohan Santin
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse, INSERM, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Karina Formoso
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse, INSERM, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Fraha Haidar
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse, INSERM, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Maria Del Pilar Oreja Fuentes
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse, INSERM, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Florence Bourgailh
- Center for Electron Microscopy Applied to Biology (CMEAB), Université de Toulouse, Faculté de Médecine, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Nesrine Hifdi
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse, INSERM, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Karim Hnia
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse, INSERM, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Yosra Doghri
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse, INSERM, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Jessica Resta
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse, INSERM, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Camille Champigny
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse, INSERM, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Séverine Lechevallier
- Center for Materials Development and Structural Studies (CEMES), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Maximin Détrait
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse, INSERM, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Grégoire Cousin
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse, INSERM, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
- Department of Cardiology, Rangueil University Hospital, Toulouse, France
| | - Malik Bisserier
- New York Medical College, New York, Department of Cell Biology and Anatomy, and of Physiology, Valhalla, New York, United States
| | - Angelo Parini
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse, INSERM, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Frank Lezoualc'h
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse, INSERM, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Marc Verelst
- Center for Materials Development and Structural Studies (CEMES), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Jeanne Mialet-Perez
- Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse, INSERM, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
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Alkhoury C, Henneman NF, Petrenko V, Shibayama Y, Segaloni A, Gadault A, Nemazanyy I, Le Guillou E, Wolide AD, Antoniadou K, Tong X, Tamaru T, Ozawa T, Girard M, Hnia K, Lutter D, Dibner C, Panasyuk G. Class 3 PI3K coactivates the circadian clock to promote rhythmic de novo purine synthesis. Nat Cell Biol 2023:10.1038/s41556-023-01171-3. [PMID: 37414850 PMCID: PMC10344785 DOI: 10.1038/s41556-023-01171-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 05/22/2023] [Indexed: 07/08/2023]
Abstract
Metabolic demands fluctuate rhythmically and rely on coordination between the circadian clock and nutrient-sensing signalling pathways, yet mechanisms of their interaction remain not fully understood. Surprisingly, we find that class 3 phosphatidylinositol-3-kinase (PI3K), known best for its essential role as a lipid kinase in endocytosis and lysosomal degradation by autophagy, has an overlooked nuclear function in gene transcription as a coactivator of the heterodimeric transcription factor and circadian driver Bmal1-Clock. Canonical pro-catabolic functions of class 3 PI3K in trafficking rely on the indispensable complex between the lipid kinase Vps34 and regulatory subunit Vps15. We demonstrate that although both subunits of class 3 PI3K interact with RNA polymerase II and co-localize with active transcription sites, exclusive loss of Vps15 in cells blunts the transcriptional activity of Bmal1-Clock. Thus, we establish non-redundancy between nuclear Vps34 and Vps15, reflected by the persistent nuclear pool of Vps15 in Vps34-depleted cells and the ability of Vps15 to coactivate Bmal1-Clock independently of its complex with Vps34. In physiology we find that Vps15 is required for metabolic rhythmicity in liver and, unexpectedly, it promotes pro-anabolic de novo purine nucleotide synthesis. We show that Vps15 activates the transcription of Ppat, a key enzyme for the production of inosine monophosphate, a central metabolic intermediate for purine synthesis. Finally, we demonstrate that in fasting, which represses clock transcriptional activity, Vps15 levels are decreased on the promoters of Bmal1 targets, Nr1d1 and Ppat. Our findings open avenues for establishing the complexity for nuclear class 3 PI3K signalling for temporal regulation of energy homeostasis.
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Affiliation(s)
- Chantal Alkhoury
- Institut Necker-Enfants Malades (INEM), Paris, France
- INSERM U1151/CNRS UMR 8253, Paris, France
- Université Paris Cité, Paris, France
| | - Nathaniel F Henneman
- Institut Necker-Enfants Malades (INEM), Paris, France
- INSERM U1151/CNRS UMR 8253, Paris, France
- Université Paris Cité, Paris, France
| | - Volodymyr Petrenko
- The Thoracic and Endocrine Surgery Division, Department of Surgery, University Hospital of Geneva, Geneva, Switzerland
- Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Institute of Genetics and Genomics in Geneva (iGE3), Geneva, Switzerland
| | - Yui Shibayama
- Institut Necker-Enfants Malades (INEM), Paris, France
- INSERM U1151/CNRS UMR 8253, Paris, France
- Université Paris Cité, Paris, France
| | - Arianna Segaloni
- Institut Necker-Enfants Malades (INEM), Paris, France
- INSERM U1151/CNRS UMR 8253, Paris, France
- Université Paris Cité, Paris, France
| | - Alexis Gadault
- Institut Necker-Enfants Malades (INEM), Paris, France
- INSERM U1151/CNRS UMR 8253, Paris, France
- Université Paris Cité, Paris, France
| | - Ivan Nemazanyy
- Platform for Metabolic Analyses, Structure Fédérative de Recherche Necker, INSERM US24/CNRS, UAR 3633, Paris, France
| | - Edouard Le Guillou
- Institut Necker-Enfants Malades (INEM), Paris, France
- INSERM U1151/CNRS UMR 8253, Paris, France
- Université Paris Cité, Paris, France
| | - Amare Desalegn Wolide
- Computational Discovery Research, Institute for Diabetes and Obesity (IDO), Helmholtz Diabetes Center (HDC), Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
- Division of Metabolic Diseases, Department of Medicine, Technische Universität München (TUM), Munich, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Konstantina Antoniadou
- Institut Necker-Enfants Malades (INEM), Paris, France
- INSERM U1151/CNRS UMR 8253, Paris, France
- Université Paris Cité, Paris, France
| | - Xin Tong
- Department of Molecular and Integrative Physiology, Caswell Diabetes Institute, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Teruya Tamaru
- Department of Physiology, Toho University School of Medicine, Tokyo, Japan
| | - Takeaki Ozawa
- Department of Chemistry, School of Science, The University of Tokyo, Tokyo, Japan
| | - Muriel Girard
- Institut Necker-Enfants Malades (INEM), Paris, France
- INSERM U1151/CNRS UMR 8253, Paris, France
- Université Paris Cité, Paris, France
| | - Karim Hnia
- Institute of Cardiovascular and Metabolic Diseases (I2MC), INSERM-UMR 1297, University Paul Sabatier, Toulouse, France
| | - Dominik Lutter
- Computational Discovery Research, Institute for Diabetes and Obesity (IDO), Helmholtz Diabetes Center (HDC), Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Charna Dibner
- The Thoracic and Endocrine Surgery Division, Department of Surgery, University Hospital of Geneva, Geneva, Switzerland
- Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Institute of Genetics and Genomics in Geneva (iGE3), Geneva, Switzerland
| | - Ganna Panasyuk
- Institut Necker-Enfants Malades (INEM), Paris, France.
- INSERM U1151/CNRS UMR 8253, Paris, France.
- Université Paris Cité, Paris, France.
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Mujalli A, Viaud J, Severin S, Gratacap MP, Chicanne G, Hnia K, Payrastre B, Terrisse AD. Exploring the Role of PI3P in Platelets: Insights from a Novel External PI3P Pool. Biomolecules 2023; 13:biom13040583. [PMID: 37189331 DOI: 10.3390/biom13040583] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/10/2023] [Accepted: 03/19/2023] [Indexed: 05/17/2023] Open
Abstract
Phosphoinositides (PIs) play a crucial role in regulating intracellular signaling, actin cytoskeleton rearrangements, and membrane trafficking by binding to specific domains of effector proteins. They are primarily found in the membrane leaflets facing the cytosol. Our study demonstrates the presence of a pool of phosphatidylinositol 3-monophosphate (PI3P) in the outer leaflet of the plasma membrane of resting human and mouse platelets. This pool of PI3P is accessible to exogenous recombinant myotubularin 3-phosphatase and ABH phospholipase. Mouse platelets with loss of function of class III PI 3-kinase and class II PI 3-kinase α have a decreased level of external PI3P, suggesting a contribution of these kinases to this pool of PI3P. After injection in mouse, or incubation ex vivo in human blood, PI3P-binding proteins decorated the platelet surface as well as α-granules. Upon activation, these platelets were able to secrete the PI3P-binding proteins. These data sheds light on a previously unknown external pool of PI3P in the platelet plasma membrane that recognizes PI3P-binding proteins, leading to their uptake towards α-granules. This study raises questions about the potential function of this external PI3P in the communication of platelets with the extracellular environment, and its possible role in eliminating proteins from the plasma.
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Affiliation(s)
- Abdulrahman Mujalli
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297, Université Paul Sabatier, F-31432 Toulouse Cedex, France
| | - Julien Viaud
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297, Université Paul Sabatier, F-31432 Toulouse Cedex, France
| | - Sonia Severin
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297, Université Paul Sabatier, F-31432 Toulouse Cedex, France
| | - Marie-Pierre Gratacap
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297, Université Paul Sabatier, F-31432 Toulouse Cedex, France
| | - Gaëtan Chicanne
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297, Université Paul Sabatier, F-31432 Toulouse Cedex, France
| | - Karim Hnia
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297, Université Paul Sabatier, F-31432 Toulouse Cedex, France
| | - Bernard Payrastre
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297, Université Paul Sabatier, F-31432 Toulouse Cedex, France
- Laboratoire d'Hématologie, Centre de Référence des Pathologies Plaquettaires, Centre Hospitalier Universitaire de Toulouse Rangueil, F-31432 Toulouse Cedex, France
| | - Anne-Dominique Terrisse
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297, Université Paul Sabatier, F-31432 Toulouse Cedex, France
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4
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Anquetil T, Solinhac R, Jaffre A, Chicanne G, Viaud J, Darcourt J, Orset C, Geuss E, Kleinschnitz C, Vanhaesebroeck B, Vivien D, Hnia K, Larrue V, Payrastre B, Gratacap MP. PI3KC2β inactivation stabilizes VE-cadherin junctions and preserves vascular integrity. EMBO Rep 2021; 22:e51299. [PMID: 33880878 DOI: 10.15252/embr.202051299] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 03/02/2021] [Accepted: 03/12/2021] [Indexed: 02/06/2023] Open
Abstract
Endothelium protection is critical, because of the impact of vascular leakage and edema on pathological conditions such as brain ischemia. Whereas deficiency of class II phosphoinositide 3-kinase alpha (PI3KC2α) results in an increase in vascular permeability, we uncover a crucial role of the beta isoform (PI3KC2β) in the loss of endothelial barrier integrity following injury. Here, we studied the role of PI3KC2β in endothelial permeability and endosomal trafficking in vitro and in vivo in ischemic stroke. Mice with inactive PI3KC2β showed protection against vascular permeability, edema, cerebral infarction, and deleterious inflammatory response. Loss of PI3KC2β in human cerebral microvascular endothelial cells stabilized homotypic cell-cell junctions by increasing Rab11-dependent VE-cadherin recycling. These results identify PI3KC2β as a potential new therapeutic target to prevent aggravating lesions following ischemic stroke.
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Affiliation(s)
- Typhaine Anquetil
- INSERM, UMR-S U1297 and University of Toulouse III, Institute of Cardiovascular and Metabolic Diseases (I2MC), CHU-Rangueil, Toulouse, France
| | - Romain Solinhac
- INSERM, UMR-S U1297 and University of Toulouse III, Institute of Cardiovascular and Metabolic Diseases (I2MC), CHU-Rangueil, Toulouse, France
| | - Aude Jaffre
- INSERM, UMR-S U1297 and University of Toulouse III, Institute of Cardiovascular and Metabolic Diseases (I2MC), CHU-Rangueil, Toulouse, France
| | - Gaëtan Chicanne
- INSERM, UMR-S U1297 and University of Toulouse III, Institute of Cardiovascular and Metabolic Diseases (I2MC), CHU-Rangueil, Toulouse, France
| | - Julien Viaud
- INSERM, UMR-S U1297 and University of Toulouse III, Institute of Cardiovascular and Metabolic Diseases (I2MC), CHU-Rangueil, Toulouse, France
| | - Jean Darcourt
- INSERM, UMR-S U1297 and University of Toulouse III, Institute of Cardiovascular and Metabolic Diseases (I2MC), CHU-Rangueil, Toulouse, France
| | - Cyrille Orset
- INSERM, UMR-S U1237 and Caen-Normandie University, Physiopathology and Imaging of Neurological Disorders (PhIND), GIP Cyceron, Caen, France
| | - Eva Geuss
- Department of Neurology, University of Würzburg, Würzburg, Germany
| | | | | | - Denis Vivien
- INSERM, UMR-S U1237 and Caen-Normandie University, Physiopathology and Imaging of Neurological Disorders (PhIND), GIP Cyceron, Caen, France.,CHU Caen, Department of Clinical Research, Caen University Hospital, Caen, France
| | - Karim Hnia
- INSERM, UMR-S U1297 and University of Toulouse III, Institute of Cardiovascular and Metabolic Diseases (I2MC), CHU-Rangueil, Toulouse, France
| | - Vincent Larrue
- INSERM, UMR-S U1297 and University of Toulouse III, Institute of Cardiovascular and Metabolic Diseases (I2MC), CHU-Rangueil, Toulouse, France.,Department of Neurology, University Hospital of Toulouse, Toulouse, France
| | - Bernard Payrastre
- INSERM, UMR-S U1297 and University of Toulouse III, Institute of Cardiovascular and Metabolic Diseases (I2MC), CHU-Rangueil, Toulouse, France.,Laboratoire d'Hématologie, CHU de Toulouse, Toulouse Cedex, France
| | - Marie-Pierre Gratacap
- INSERM, UMR-S U1297 and University of Toulouse III, Institute of Cardiovascular and Metabolic Diseases (I2MC), CHU-Rangueil, Toulouse, France
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5
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Mansat M, Picot M, Chicanne G, Nahoum V, Gaits-Iacovoni F, Payrastre B, Hnia K, Viaud J. Liposome-Based Methods to Study Protein-Phosphoinositide Interaction. Methods Mol Biol 2021; 2251:177-184. [PMID: 33481239 DOI: 10.1007/978-1-0716-1142-5_12] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Following their generation by lipid kinases and phosphatases, phosphoinositides regulate important biological processes such as cytoskeleton rearrangement, membrane remodeling/trafficking, and gene expression through the interaction of their phosphorylated inositol head group with a variety of protein domains such as PH, PX, and FYVE. Therefore, it is important to determine the specificity of phosphoinositides toward effector proteins to understand their impact on cellular physiology. Several methods have been developed to identify and characterize phosphoinositide effectors, and liposomes-based methods are preferred because the phosphoinositides are incorporated in a membrane, the composition of which can mimic cellular membranes. In this report, we describe the experimental setup for liposome flotation assay and a recently developed method called protein-lipid interaction by fluorescence (PLIF) for the characterization of phosphoinositide-binding specificities of proteins.
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Affiliation(s)
- Mélanie Mansat
- INSERM U1048 and Université Toulouse 3, Toulouse Cedex, France
| | - Mélanie Picot
- INSERM U1048 and Université Toulouse 3, Toulouse Cedex, France
| | - Gaëtan Chicanne
- INSERM U1048 and Université Toulouse 3, Toulouse Cedex, France
| | - Virginie Nahoum
- CNRS, Institut de Pharmacologie et de Biologie Structurale (IPBS), Toulouse, France
- Université de Toulouse, UPS (Université Paul Sabatier), IPBS, Toulouse, France
| | | | - Bernard Payrastre
- INSERM U1048 and Université Toulouse 3, Toulouse Cedex, France
- CHU (Centre Hospitalier Universitaire) de Toulouse, Laboratoire d'Hématologie, Toulouse Cedex, France
| | - Karim Hnia
- INSERM U1048 and Université Toulouse 3, Toulouse Cedex, France
| | - Julien Viaud
- INSERM U1048 and Université Toulouse 3, Toulouse Cedex, France.
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6
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Chicanne G, Bertrand-Michel J, Viaud J, Hnia K, Clark J, Payrastre B. Profiling of Phosphoinositide Molecular Species in Resting or Activated Human or Mouse Platelets by a LC-MS Method. Methods Mol Biol 2021; 2251:39-53. [PMID: 33481230 DOI: 10.1007/978-1-0716-1142-5_3] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Our knowledge of the role and biology of the different phosphoinositides has greatly expanded over recent years. Reversible phosphorylation by specific kinases and phosphatases of positions 3, 4, and 5 on the inositol ring is a highly dynamic process playing a critical role in the regulation of the spatiotemporal recruitment and binding of effector proteins. The specific phosphoinositide kinases and phosphatases are key players in the control of many cellular functions, including proliferation, survival, intracellular trafficking, or cytoskeleton reorganization. Several of these enzymes are mutated in human diseases. The impact of the fatty acid composition of phosphoinositides in their function is much less understood. There is an important molecular diversity in the fatty acid side chains of PI. While stearic and arachidonic fatty acids are the major acyl species in PIP, PIP2, and PIP3, other fatty acid combinations are also found. The role of these different molecular species is still unknown, but it is important to quantify these different molecules and their potential changes during cell stimulation to better characterize this emerging field. Here, we describe a sensitive high-performance liquid chromatography-mass spectrometry method that we used for the first time to profile the changes in phosphoinositide molecular species (summed fatty acyl chain profiles) in human and mouse platelets under resting conditions and following stimulation. This method can be applied to other hematopoietic primary cells isolated from human or experimental animal models.
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Affiliation(s)
- Gaëtan Chicanne
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm U1048, Université Toulouse III, Toulouse, France
| | - Justine Bertrand-Michel
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm U1048, Université Toulouse III, Toulouse, France
- MetaToul-Lipidomic Facility, MetaboHUB, Université Toulouse III, Toulouse, France
| | - Julien Viaud
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm U1048, Université Toulouse III, Toulouse, France
| | - Karim Hnia
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm U1048, Université Toulouse III, Toulouse, France
| | | | - Bernard Payrastre
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm U1048, Université Toulouse III, Toulouse, France.
- Laboratoire d'Hématologie, Centre Hospitalier Universitaire de Toulouse, Toulouse, France.
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7
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Viaud J, Chicanne G, Solinhac R, Hnia K, Gaits-Iacovoni F, Payrastre B. Mass Assays to Quantify Bioactive PtdIns3P and PtdIns5P During Autophagic Responses. Methods Enzymol 2016; 587:293-310. [PMID: 28253962 DOI: 10.1016/bs.mie.2016.09.061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 01/11/2023]
Abstract
Autophagy is a cellular process whereby cytoplasmic substrates are targeted for degradation in the lysosome via the membrane structures autophagosomes. This process is initiated by specific phosphoinositides, PtdIns3P and PtdIns5P, which play a key role in autophagy by recruiting effectors such as Atg18/WIPI2. Therefore, quantifying those lipids is important to better understand the assembly of the complex autophagic machinery. Herein, we describe in detail methods to quantify PtdIns3P and PtdIns5P by specific mass assays feasible in most laboratories.
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Affiliation(s)
- J Viaud
- INSERM, U1048 and Université Toulouse 3, I2MC, Toulouse, France
| | - G Chicanne
- INSERM, U1048 and Université Toulouse 3, I2MC, Toulouse, France
| | - R Solinhac
- INSERM, U1048 and Université Toulouse 3, I2MC, Toulouse, France
| | - K Hnia
- INSERM, U1048 and Université Toulouse 3, I2MC, Toulouse, France
| | | | - B Payrastre
- INSERM, U1048 and Université Toulouse 3, I2MC, Toulouse, France; CHU (Centre Hospitalier Universitaire) de Toulouse, Laboratoire d'Hématologie, Toulouse, France.
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8
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D'Alessandro M, Hnia K, Gache V, Koch C, Gavriilidis C, Rodriguez D, Nicot AS, Romero NB, Schwab Y, Gomes E, Labouesse M, Laporte J. Amphiphysin 2 Orchestrates Nucleus Positioning and Shape by Linking the Nuclear Envelope to the Actin and Microtubule Cytoskeleton. Dev Cell 2016; 35:186-98. [PMID: 26506308 DOI: 10.1016/j.devcel.2015.09.018] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 07/31/2015] [Accepted: 09/23/2015] [Indexed: 12/31/2022]
Abstract
Nucleus positioning is key for intracellular organization, cell differentiation, and organ development and is affected in many diseases, including myopathies due to alteration in amphiphysin-2 (BIN1). The actin and microtubule cytoskeletons are essential for nucleus positioning, but their crosstalk in this process is sparsely characterized. Here, we report that impairment of amphiphysin/BIN1 in Caenorhabditis elegans, mammalian cells, or muscles from patients with centronuclear myopathy alters nuclear position and shape. We show that AMPH-1/BIN1 binds to nesprin and actin, as well as to the microtubule-binding protein CLIP170 in both species. Expression of the microtubule-anchoring CAP-GLY domain of CLIP170 fused to the nuclear-envelope-anchoring KASH domain of nesprin rescues nuclear positioning defects of amph-1 mutants. Amphiphysins thus play a central role in linking the nuclear envelope with the actin and microtubule cytoskeletons. We propose that BIN1 has a direct and evolutionarily conserved role in nuclear positioning, altered in myopathies.
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Affiliation(s)
- Manuela D'Alessandro
- IGBMC, INSERM U964, CNRS UMR7104, Strasbourg University, 67404 Illkirch, France; University Claude Bernard Lyon 1, CGphiMC UMR CNRS 5534, 69622 Villeurbanne, France.
| | - Karim Hnia
- IGBMC, INSERM U964, CNRS UMR7104, Strasbourg University, 67404 Illkirch, France
| | - Vincent Gache
- Myology Group, UMR S 787 INSERM, Université Pierre et Marie Curie Paris 6, 75634 Paris, France; CNRS UMR5239, Laboratoire de Biologie Moléculaire de la Cellule (LBMC), Ecole Normale Supérieure de Lyon, 69364 Lyon Cedex 07, France
| | - Catherine Koch
- IGBMC, INSERM U964, CNRS UMR7104, Strasbourg University, 67404 Illkirch, France
| | | | - David Rodriguez
- IGBMC, INSERM U964, CNRS UMR7104, Strasbourg University, 67404 Illkirch, France
| | - Anne-Sophie Nicot
- IGBMC, INSERM U964, CNRS UMR7104, Strasbourg University, 67404 Illkirch, France
| | - Norma B Romero
- Morphology Neuromuscular Unit of the Myology Institute, GHU Pitié-Salpêtrière, 75013 Paris, France
| | - Yannick Schwab
- IGBMC, INSERM U964, CNRS UMR7104, Strasbourg University, 67404 Illkirch, France; Cell Biology and Biophysics Unit, EMBL Heidelberg, 69117 Heidelberg, Germany
| | - Edgar Gomes
- Myology Group, UMR S 787 INSERM, Université Pierre et Marie Curie Paris 6, 75634 Paris, France; Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Michel Labouesse
- IGBMC, INSERM U964, CNRS UMR7104, Strasbourg University, 67404 Illkirch, France; UMR7622, IBPS, UPMC, 75252 Paris, France
| | - Jocelyn Laporte
- IGBMC, INSERM U964, CNRS UMR7104, Strasbourg University, 67404 Illkirch, France.
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9
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Falcone S, Roman W, Hnia K, Gache V, Didier N, Lainé J, Auradé F, Marty I, Nishino I, Charlet-Berguerand N, Romero NB, Marazzi G, Sassoon D, Laporte J, Gomes ER. N-WASP is required for Amphiphysin-2/BIN1-dependent nuclear positioning and triad organization in skeletal muscle and is involved in the pathophysiology of centronuclear myopathy. EMBO Mol Med 2015; 6:1455-75. [PMID: 25262827 PMCID: PMC4237471 DOI: 10.15252/emmm.201404436] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [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: 01/19/2023] Open
Abstract
Mutations in amphiphysin-2/BIN1, dynamin 2, and myotubularin are associated with centronuclear myopathy (CNM), a muscle disorder characterized by myofibers with atypical central nuclear positioning and abnormal triads. Mis-splicing of amphiphysin-2/BIN1 is also associated with myotonic dystrophy that shares histopathological hallmarks with CNM. How amphiphysin-2 orchestrates nuclear positioning and triad organization and how CNM-associated mutations lead to muscle dysfunction remains elusive. We find that N-WASP interacts with amphiphysin-2 in myofibers and that this interaction and N-WASP distribution are disrupted by amphiphysin-2 CNM mutations. We establish that N-WASP functions downstream of amphiphysin-2 to drive peripheral nuclear positioning and triad organization during myofiber formation. Peripheral nuclear positioning requires microtubule/Map7/Kif5b-dependent distribution of nuclei along the myofiber and is driven by actin and nesprins. In adult myofibers, N-WASP and amphiphysin-2 are only involved in the maintenance of triad organization but not in the maintenance of peripheral nuclear positioning. Importantly, we confirmed that N-WASP distribution is disrupted in CNM and myotonic dystrophy patients. Our results support a role for N-WASP in amphiphysin-2-dependent nuclear positioning and triad organization and in CNM and myotonic dystrophy pathophysiology.
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Affiliation(s)
- Sestina Falcone
- Myology Group, UMR S 787 INSERM, Université Pierre et Marie Curie Paris 6, Paris, France Institut de Myologie, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - William Roman
- Myology Group, UMR S 787 INSERM, Université Pierre et Marie Curie Paris 6, Paris, France
| | - Karim Hnia
- IGBMC-CNRS, UMR 7104 INSERM U964, Illkirch, France
| | - Vincent Gache
- Myology Group, UMR S 787 INSERM, Université Pierre et Marie Curie Paris 6, Paris, France Institut de Myologie, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Nathalie Didier
- Myology Group, UMR S 787 INSERM, Université Pierre et Marie Curie Paris 6, Paris, France
| | - Jeanne Lainé
- Institut de Myologie, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Frederic Auradé
- Myology Group, UMR S 787 INSERM, Université Pierre et Marie Curie Paris 6, Paris, France
| | - Isabelle Marty
- INSERM U836, Grenoble Institut des Neurosciences, Equipe Muscle et Pathologies, Grenoble, France
| | - Ichizo Nishino
- National Center of Neurology and Psychiatry, Tokyo, Japan
| | | | | | - Giovanna Marazzi
- Myology Group, UMR S 787 INSERM, Université Pierre et Marie Curie Paris 6, Paris, France
| | - David Sassoon
- Myology Group, UMR S 787 INSERM, Université Pierre et Marie Curie Paris 6, Paris, France
| | | | - Edgar R Gomes
- Myology Group, UMR S 787 INSERM, Université Pierre et Marie Curie Paris 6, Paris, France Institut de Myologie, Groupe Hospitalier Pitié-Salpêtrière, Paris, France Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisboa, Portugal
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10
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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.
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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.
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11
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Picas L, Viaud J, Schauer K, Vanni S, Hnia K, Fraisier V, Roux A, Bassereau P, Gaits-Iacovoni F, Payrastre B, Laporte J, Manneville JB, Goud B. BIN1/M-Amphiphysin2 induces clustering of phosphoinositides to recruit its downstream partner dynamin. Nat Commun 2014; 5:5647. [PMID: 25487648 DOI: 10.1038/ncomms6647] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Accepted: 10/22/2014] [Indexed: 01/13/2023] Open
Abstract
Phosphoinositides play a central role in many physiological processes by assisting the recruitment of proteins to membranes through specific phosphoinositide-binding motifs. How this recruitment is coordinated in space and time is not well understood. Here we show that BIN1/M-Amphiphysin2, a protein involved in T-tubule biogenesis in muscle cells and frequently mutated in centronuclear myopathies, clusters PtdIns(4,5)P2 to recruit its downstream partner dynamin. By using several mutants associated with centronuclear myopathies, we find that the N-BAR and the SH3 domains of BIN1 control the kinetics and the accumulation of dynamin on membranes, respectively. We show that phosphoinositide clustering is a mechanism shared by other proteins that interact with PtdIns(4,5)P2, but do not contain a BAR domain. Our numerical simulations point out that clustering is a diffusion-driven process in which phosphoinositide molecules are not sequestered. We propose that this mechanism plays a key role in the recruitment of downstream phosphoinositide-binding proteins.
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Affiliation(s)
- Laura Picas
- Institut Curie and CNRS UMR 144, 26 rue d'Ulm, 75005 Paris, France
| | - Julien Viaud
- INSERM, UMR1048, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, 1 avenue Jean Poulhès, 31432 Toulouse, France
| | - Kristine Schauer
- Institut Curie and CNRS UMR 144, 26 rue d'Ulm, 75005 Paris, France
| | - Stefano Vanni
- Institut de Pharmacologie Moléculaire et Cellulaire, Université de Nice Sophia-Antipolis and Centre National de la Recherche Scientifique, UMR 7275, 06560 Valbonne, France
| | - Karim Hnia
- Department of Translational Medicine, IGBMC, U964, UMR7104, Strasbourg University, Collège de France, 1 Rue Laurent Fries, 67404 Illkirch, France
| | - Vincent Fraisier
- Institut Curie and CNRS UMR 144, Cell and Tissue Imaging Platform, 26 rue d'Ulm, 75005 Paris, France
| | - Aurélien Roux
- Biochemistry Department, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | | | - Frédérique Gaits-Iacovoni
- INSERM, UMR1048, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, 1 avenue Jean Poulhès, 31432 Toulouse, France
| | - Bernard Payrastre
- INSERM, UMR1048, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, 1 avenue Jean Poulhès, 31432 Toulouse, France
| | - Jocelyn Laporte
- Department of Translational Medicine, IGBMC, U964, UMR7104, Strasbourg University, Collège de France, 1 Rue Laurent Fries, 67404 Illkirch, France
| | | | - Bruno Goud
- Institut Curie and CNRS UMR 144, 26 rue d'Ulm, 75005 Paris, France
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12
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Hnia K, Ramspacher C, Vermot J, Laporte J. Desmin in muscle and associated diseases: beyond the structural function. Cell Tissue Res 2014; 360:591-608. [PMID: 25358400 DOI: 10.1007/s00441-014-2016-4] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 09/22/2014] [Indexed: 11/25/2022]
Abstract
Desmin is a muscle-specific type III intermediate filament essential for proper muscular structure and function. In human, mutations affecting desmin expression or promoting its aggregation lead to skeletal (desmin-related myopathies), or cardiac (desmin-related cardiomyopathy) phenotypes, or both. Patient muscles display intracellular accumulations of misfolded proteins and desmin-positive insoluble granulofilamentous aggregates, leading to a large spectrum of molecular alterations. Increasing evidence shows that desmin function is not limited to the structural and mechanical integrity of cells. This novel perception is strongly supported by the finding that diseases featuring desmin aggregates cannot be easily associated with mechanical defects, but rather involve desmin filaments in a broader spectrum of functions, such as in organelle positioning and integrity and in signaling. Here, we review desmin functions and related diseases affecting striated muscles. We detail emergent cellular functions of desmin based on reported phenotypes in patients and animal models. We discuss known desmin protein partners and propose an overview of the way that this molecular network could serve as a signal transduction platform necessary for proper muscle function.
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Affiliation(s)
- Karim Hnia
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France,
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13
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Assoum M, Salih MA, Drouot N, Hnia K, Martelli A, Koenig M. The Salih ataxia mutation impairs Rubicon endosomal localization. Cerebellum 2014; 12:835-40. [PMID: 23728897 DOI: 10.1007/s12311-013-0489-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
We previously described a new form of recessive ataxia, Salih ataxia, in a large consanguineous Saudi Arabian family with three affected children carrying a new identified mutation in the KIAA0226 gene (c.2624delC; p.Ala875ValfsX146) coding for Rubicon. The pathogenicity of such mutation remains to be identified. Hence, we address the cellular impact of Rubicon p.Ala875ValfsX146 on endosomal/lysosomal machinery on cultured cells. We confirm that Rubicon colocalizes with the late endosome marker Rab7 and demonstrate that it also colocalizes with LampI at lysosomes. The Salih ataxia mutation leads to a diffuse cytosolic distribution and mislocalized protein from the late endosomes, indicating that deletion of the diacylglycerol binding-like motif in the mutant protein interferes with normal Rubicon subcellular localization and confirming the pathogenicity of the mutation.
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Affiliation(s)
- M Assoum
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/Université de Strasbourg, et Collège de France, 67404, Illkirch, France,
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14
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Gupta VA, Hnia K, Smith LL, Gundry SR, McIntire JE, Shimazu J, Bass JR, Talbot EA, Amoasii L, Goldman NE, Laporte J, Beggs AH. Loss of catalytically inactive lipid phosphatase myotubularin-related protein 12 impairs myotubularin stability and promotes centronuclear myopathy in zebrafish. PLoS Genet 2013; 9:e1003583. [PMID: 23818870 PMCID: PMC3688503 DOI: 10.1371/journal.pgen.1003583] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [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: 12/20/2012] [Accepted: 05/07/2013] [Indexed: 01/08/2023] Open
Abstract
X-linked myotubular myopathy (XLMTM) is a congenital disorder caused by mutations of the myotubularin gene, MTM1. Myotubularin belongs to a large family of conserved lipid phosphatases that include both catalytically active and inactive myotubularin-related proteins (i.e., "MTMRs"). Biochemically, catalytically inactive MTMRs have been shown to form heteroligomers with active members within the myotubularin family through protein-protein interactions. However, the pathophysiological significance of catalytically inactive MTMRs remains unknown in muscle. By in vitro as well as in vivo studies, we have identified that catalytically inactive myotubularin-related protein 12 (MTMR12) binds to myotubularin in skeletal muscle. Knockdown of the mtmr12 gene in zebrafish resulted in skeletal muscle defects and impaired motor function. Analysis of mtmr12 morphant fish showed pathological changes with central nucleation, disorganized Triads, myofiber hypotrophy and whorled membrane structures similar to those seen in X-linked myotubular myopathy. Biochemical studies showed that deficiency of MTMR12 results in reduced levels of myotubularin protein in zebrafish and mammalian C2C12 cells. Loss of myotubularin also resulted in reduction of MTMR12 protein in C2C12 cells, mice and humans. Moreover, XLMTM mutations within the myotubularin interaction domain disrupted binding to MTMR12 in cell culture. Analysis of human XLMTM patient myotubes showed that mutations that disrupt the interaction between myotubularin and MTMR12 proteins result in reduction of both myotubularin and MTMR12. These studies strongly support the concept that interactions between myotubularin and MTMR12 are required for the stability of their functional protein complex in normal skeletal muscles. This work highlights an important physiological function of catalytically inactive phosphatases in the pathophysiology of myotubular myopathy and suggests a novel therapeutic approach through identification of drugs that could stabilize the myotubularin-MTMR12 complex and hence ameliorate this disorder.
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Affiliation(s)
- Vandana A. Gupta
- Genomics Program and Division of Genetics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Karim Hnia
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Inserm U964, CNRS UMR7104, Université de Strasbourg, Collège de France, Chaire de Génétique Humaine, Illkirch, France
| | - Laura L. Smith
- Genomics Program and Division of Genetics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Stacey R. Gundry
- Genomics Program and Division of Genetics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jessica E. McIntire
- Genomics Program and Division of Genetics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Junko Shimazu
- Genomics Program and Division of Genetics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jessica R. Bass
- Genomics Program and Division of Genetics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Ethan A. Talbot
- Genomics Program and Division of Genetics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Leonela Amoasii
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Inserm U964, CNRS UMR7104, Université de Strasbourg, Collège de France, Chaire de Génétique Humaine, Illkirch, France
| | - Nathaniel E. Goldman
- Genomics Program and Division of Genetics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jocelyn Laporte
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Inserm U964, CNRS UMR7104, Université de Strasbourg, Collège de France, Chaire de Génétique Humaine, Illkirch, France
| | - Alan H. Beggs
- Genomics Program and Division of Genetics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail:
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15
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Amoasii L, Hnia K, Chicanne G, Brech A, Cowling BS, Müller MM, Schwab Y, Koebel P, Ferry A, Payrastre B, Laporte J. Myotubularin and PtdIns3P remodel the sarcoplasmic reticulum in muscle in vivo. J Cell Sci 2013; 126:1806-19. [PMID: 23444364 DOI: 10.1242/jcs.118505] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The sarcoplasmic reticulum (SR) is a specialized form of endoplasmic reticulum (ER) in skeletal muscle and is essential for calcium homeostasis. The mechanisms involved in SR remodeling and maintenance of SR subdomains are elusive. In this study, we identified myotubularin (MTM1), a phosphoinositide phosphatase mutated in X-linked centronuclear myopathy (XLCNM, or myotubular myopathy), as a key regulator of phosphatidylinositol 3-monophosphate (PtdIns3P) levels at the SR. MTM1 is predominantly located at the SR cisternae of the muscle triads, and Mtm1-deficient mouse muscles and myoblasts from XLCNM patients exhibit abnormal SR/ER networks. In vivo modulation of MTM1 enzymatic activity in skeletal muscle using ectopic expression of wild-type or a dead-phosphatase MTM1 protein leads to differential SR remodeling. Active MTM1 is associated with flat membrane stacks, whereas dead-phosphatase MTM1 mutant promotes highly curved cubic membranes originating from the SR and enriched in PtdIns3P. Overexpression of a tandem FYVE domain with high affinity for PtdIns3P alters the shape of the SR cisternae at the triad. Our findings, supported by the parallel analysis of the Mtm1-null mouse and an in vivo study, reveal a direct function of MTM1 enzymatic activity in SR remodeling and a key role for PtdIns3P in promoting SR membrane curvature in skeletal muscle. We propose that alteration in SR remodeling is a primary cause of X-linked centronuclear myopathy. The tight regulation of PtdIns3P on specific membrane subdomains may be a general mechanism to control membrane curvature.
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Affiliation(s)
- Leonela Amoasii
- Department of Translational Medicine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR7104, Université de Strasbourg, Collège de France, 67404 Illkirch, France
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Amoasii L, Bertazzi DL, Tronchère H, Hnia K, Chicanne G, Rinaldi B, Cowling BS, Ferry A, Klaholz B, Payrastre B, Laporte J, Friant S. Phosphatase-dead myotubularin ameliorates X-linked centronuclear myopathy phenotypes in mice. PLoS Genet 2012; 8:e1002965. [PMID: 23071445 PMCID: PMC3469422 DOI: 10.1371/journal.pgen.1002965] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [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: 02/14/2012] [Accepted: 08/08/2012] [Indexed: 12/27/2022] Open
Abstract
Myotubularin MTM1 is a phosphoinositide (PPIn) 3-phosphatase mutated in X-linked centronuclear myopathy (XLCNM; myotubular myopathy). We investigated the involvement of MTM1 enzymatic activity on XLCNM phenotypes. Exogenous expression of human MTM1 in yeast resulted in vacuolar enlargement, as a consequence of its phosphatase activity. Expression of mutants from patients with different clinical progression and determination of PtdIns3P and PtdIns5P cellular levels confirmed the link between vacuolar morphology and MTM1 phosphatase activity, and showed that some disease mutants retain phosphatase activity. Viral gene transfer of phosphatase-dead myotubularin mutants (MTM1(C375S) and MTM1(S376N)) significantly improved most histological signs of XLCNM displayed by a Mtm1-null mouse, at similar levels as wild-type MTM1. Moreover, the MTM1(C375S) mutant improved muscle performance and restored the localization of nuclei, triad alignment, and the desmin intermediate filament network, while it did not normalize PtdIns3P levels, supporting phosphatase-independent roles of MTM1 in maintaining normal muscle performance and organelle positioning in skeletal muscle. Among the different XLCNM signs investigated, we identified only triad shape and fiber size distribution as being partially dependent on MTM1 phosphatase activity. In conclusion, this work uncovers MTM1 roles in the structural organization of muscle fibers that are independent of its enzymatic activity. This underlines that removal of enzymes should be used with care to conclude on the physiological importance of their activity.
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MESH Headings
- Animals
- Desmin/metabolism
- Disease Models, Animal
- Enzyme Activation/genetics
- Gene Expression
- Humans
- Male
- Mice
- Mice, Knockout
- Muscle Strength/genetics
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/pathology
- Muscle, Skeletal/ultrastructure
- Mutation
- Myopathies, Structural, Congenital/genetics
- Myopathies, Structural, Congenital/metabolism
- Phenotype
- Phosphatidylinositol Phosphates/metabolism
- Phosphoric Monoester Hydrolases/metabolism
- Protein Tyrosine Phosphatases, Non-Receptor/genetics
- Protein Tyrosine Phosphatases, Non-Receptor/metabolism
- Saccharomyces cerevisiae/genetics
- Saccharomyces cerevisiae/metabolism
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Affiliation(s)
- Leonela Amoasii
- Department of Translational Medecine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR7104, Université de Strasbourg, Collège de France, Illkirch, France
| | - Dimitri L. Bertazzi
- Department of Molecular and Cellular Genetics, UMR7156, Université de Strasbourg and CNRS, Strasbourg, France
| | | | - Karim Hnia
- Department of Translational Medecine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR7104, Université de Strasbourg, Collège de France, Illkirch, France
| | - Gaëtan Chicanne
- INSERM, U1048 and Université Toulouse 3, I2MC, Toulouse, France
| | - Bruno Rinaldi
- Department of Molecular and Cellular Genetics, UMR7156, Université de Strasbourg and CNRS, Strasbourg, France
| | - Belinda S. Cowling
- Department of Translational Medecine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR7104, Université de Strasbourg, Collège de France, Illkirch, France
| | - Arnaud Ferry
- UMRS974, Université Pierre et Marie Curie, Paris, France
| | - Bruno Klaholz
- Department of Integrated Structural Biology, IGBMC, INSERM U964, CNRS UMR7104, Université de Strasbourg, Illkirch, France
| | - Bernard Payrastre
- INSERM, U1048 and Université Toulouse 3, I2MC, Toulouse, France
- CHU de Toulouse, Laboratoire d'Hématologie, Toulouse, France
- * E-mail: (SF); (JL); (BP)
| | - Jocelyn Laporte
- Department of Translational Medecine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR7104, Université de Strasbourg, Collège de France, Illkirch, France
- * E-mail: (SF); (JL); (BP)
| | - Sylvie Friant
- Department of Molecular and Cellular Genetics, UMR7156, Université de Strasbourg and CNRS, Strasbourg, France
- * E-mail: (SF); (JL); (BP)
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Amoasii L, Bertazzi D, Hnia K, Tronchere H, Rinaldi B, Chicanne G, Cowling B, Ferry A, Payrastre B, Laporte J, Friant S. C.P.10 Phosphatase inactive myotubularin rescues X-linked centronuclear (myotubular) myopathy phenotypes in mice. Neuromuscul Disord 2012. [DOI: 10.1016/j.nmd.2012.06.138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hnia K, Kretz C, Amoasii L, Böhm J, Liu X, Messaddeq N, Qu CK, Laporte J. Primary T-tubule and autophagy defects in the phosphoinositide phosphatase Jumpy/MTMR14 knockout mice muscle. Adv Biol Regul 2012; 52:98-107. [PMID: 21930146 DOI: 10.1016/j.advenzreg.2011.09.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Accepted: 09/06/2011] [Indexed: 05/31/2023]
Affiliation(s)
- Karim Hnia
- Department of Translational Medicine and Neurogenetics, IGBMC (Institut de Génétique et de Biologie Moléculaire et Cellulaire), 1, rue Laurent Fries, BP10142, 67404 Illkirch, France
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Hnia K, Laporte J. [The myotubularin-desmin complex regulates mitochondria dynamics]. Med Sci (Paris) 2011; 27:458-60. [PMID: 21609660 DOI: 10.1051/medsci/2011275004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
MESH Headings
- Actin Cytoskeleton/ultrastructure
- Animals
- Biological Transport
- Desmin/deficiency
- Desmin/genetics
- Desmin/physiology
- Humans
- Mallory Bodies/pathology
- Mice
- Mice, Knockout
- Mitochondria, Heart/metabolism
- Mitochondria, Heart/pathology
- Mitochondria, Muscle/metabolism
- Mitochondria, Muscle/pathology
- Models, Biological
- Multiprotein Complexes/physiology
- Muscle Fibers, Skeletal/metabolism
- Muscle Fibers, Skeletal/ultrastructure
- Muscle Rigidity/genetics
- Muscular Dystrophies/genetics
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/ultrastructure
- Myopathies, Structural, Congenital/genetics
- Myopathies, Structural, Congenital/metabolism
- Phosphorylation
- Protein Processing, Post-Translational
- Protein Tyrosine Phosphatases, Non-Receptor/deficiency
- Protein Tyrosine Phosphatases, Non-Receptor/genetics
- Protein Tyrosine Phosphatases, Non-Receptor/physiology
- Recombinant Fusion Proteins/physiology
- Scoliosis/genetics
- Spinal Diseases/genetics
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Toussaint A, Cowling BS, Hnia K, Mohr M, Oldfors A, Schwab Y, Yis U, Maisonobe T, Stojkovic T, Wallgren-Pettersson C, Laugel V, Echaniz-Laguna A, Mandel JL, Nishino I, Laporte J. Defects in amphiphysin 2 (BIN1) and triads in several forms of centronuclear myopathies. Acta Neuropathol 2011; 121:253-66. [PMID: 20927630 DOI: 10.1007/s00401-010-0754-2] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Revised: 09/24/2010] [Accepted: 09/25/2010] [Indexed: 11/24/2022]
Abstract
Myotubular myopathy and centronuclear myopathies (CNM) are congenital myopathies characterized by generalized muscle weakness and mislocalization of muscle fiber nuclei. Genetically distinct forms exist, and mutations in BIN1 were recently identified in autosomal recessive cases (ARCNM). Amphiphysins have been implicated in membrane remodeling in brain and skeletal muscle. Our objective was to decipher the pathogenetic mechanisms underlying different forms of CNM, with a focus on ARCNM cases. In this study, we compare the histopathological features from patients with X-linked, autosomal recessive, and dominant forms, respectively, mutated in myotubularin (MTM1), amphiphysin 2 (BIN1), and dynamin 2 (DNM2). We further characterize the ultrastructural defects in ARCNM muscles. We demonstrate that the two BIN1 isoforms expressed in skeletal muscle possess the phosphoinositide-binding domain and are specifically targeted to the triads close to the DHPR-RYR1 complex. Cardiac isoforms do not contain this domain, suggesting that splicing of BIN1 regulates its specific function in skeletal muscle. Immunofluorescence analyses of muscles from patients with BIN1 mutations reveal aberrations of BIN1 localization and triad organization. These defects are also observed in X-linked and autosomal dominant forms of CNM and in Mtm1 knockout mice. In addition to previously reported implications of BIN1 in cancer as a tumor suppressor, these findings sustain an important role for BIN1 skeletal muscle isoforms in membrane remodeling and organization of the excitation-contraction machinery. We propose that aberrant BIN1 localization and defects in triad structure are part of a common pathogenetic mechanism shared between the three forms of centronuclear myopathies.
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MESH Headings
- Adaptor Proteins, Signal Transducing/genetics
- Adolescent
- Adult
- Brain/pathology
- Brain/ultrastructure
- Child
- Dynamin II/genetics
- Female
- Humans
- Infant
- Male
- Microscopy, Electron, Transmission/methods
- Muscle, Skeletal/pathology
- Muscle, Skeletal/ultrastructure
- Mutation/genetics
- Myopathies, Structural, Congenital/classification
- Myopathies, Structural, Congenital/genetics
- Nuclear Proteins/genetics
- Protein Tyrosine Phosphatases, Non-Receptor/genetics
- Tumor Suppressor Proteins/genetics
- Young Adult
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Affiliation(s)
- Anne Toussaint
- Department of Neurobiology and Genetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
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Hnia K, Tronchère H, Tomczak KK, Amoasii L, Schultz P, Beggs AH, Payrastre B, Mandel JL, Laporte J. Myotubularin controls desmin intermediate filament architecture and mitochondrial dynamics in human and mouse skeletal muscle. J Clin Invest 2010; 121:70-85. [PMID: 21135508 DOI: 10.1172/jci44021] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Accepted: 10/13/2010] [Indexed: 12/27/2022] Open
Abstract
Muscle contraction relies on a highly organized intracellular network of membrane organelles and cytoskeleton proteins. Among the latter are the intermediate filaments (IFs), a large family of proteins mutated in more than 30 human diseases. For example, mutations in the DES gene, which encodes the IF desmin, lead to desmin-related myopathy and cardiomyopathy. Here, we demonstrate that myotubularin (MTM1), which is mutated in individuals with X-linked centronuclear myopathy (XLCNM; also known as myotubular myopathy), is a desmin-binding protein and provide evidence for direct regulation of desmin by MTM1 in vitro and in vivo. XLCNM-causing mutations in MTM1 disrupted the MTM1-desmin complex, resulting in abnormal IF assembly and architecture in muscle cells and both mouse and human skeletal muscles. Adeno-associated virus-mediated ectopic expression of WT MTM1 in Mtm1-KO muscle reestablished normal desmin expression and localization. In addition, decreased MTM1 expression and XLCNM-causing mutations induced abnormal mitochondrial positioning, shape, dynamics, and function. We therefore conclude that MTM1 is a major regulator of both the desmin cytoskeleton and mitochondria homeostasis, specifically in skeletal muscle. Defects in IF stabilization and mitochondrial dynamics appear as common physiopathological features of centronuclear myopathies and desmin-related myopathies.
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Affiliation(s)
- Karim Hnia
- Department of Neurobiology and Genetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
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Hnia K, Notarnicola C, de Santa Barbara P, Hugon G, Rivier F, Laoudj-Chenivesse D, Mornet D. Biochemical properties of gastrokine-1 purified from chicken gizzard smooth muscle. PLoS One 2008; 3:e3854. [PMID: 19057650 PMCID: PMC2588339 DOI: 10.1371/journal.pone.0003854] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [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: 07/17/2008] [Accepted: 11/03/2008] [Indexed: 12/11/2022] Open
Abstract
The potential role and function of gastrokine-1 (GNK1) in smooth muscle cells is investigated in this work by first establishing a preparative protocol to obtain this native protein from freshly dissected chicken gizzard. Some unexpected biochemical properties of gastrokine-1 were deduced by producing specific polyclonal antibody against the purified protein. We focused on the F-actin interaction with gastrokine-1 and the potential role and function in smooth muscle contractile properties. Background GNK1 is thought to provide mucosal protection in the superficial gastric epithelium. However, the actual role of gastrokine-1 with regards to its known decreased expression in gastric cancer is still unknown. Recently, trefoil factors (TFF) were reported to have important roles in gastric epithelial regeneration and cell turnover, and could be involved in GNK1 interactions. The aim of this study was to evaluate the role and function of GNK1 in smooth muscle cells. Methodology/Principal Findings From fresh chicken gizzard smooth muscle, an original purification procedure was used to purify a heat soluble 20 kDa protein that was sequenced and found to correspond to the gastrokine-1 protein sequence containing one BRICHOS domain and at least two or possibly three transmembrane regions. The purified protein was used to produce polyclonal antibody and highlighted the smooth muscle cell distribution and F-actin association of GNK1 through a few different methods. Conclusion/Significance Altogether our data illustrate a broader distribution of gastrokine-1 in smooth muscle than only in the gastrointestinal epithelium, and the specific interaction with F-actin highlights and suggests a new role and function of GNK1 within smooth muscle cells. A potential role via TFF interaction in cell-cell adhesion and assembly of actin stress fibres is discussed.
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Affiliation(s)
- Karim Hnia
- INSERM ERI 25 “Muscle et Pathologies”, Université Montpellier 1, EA 4202, CHU Arnaud de Villeneuve, Montpellier, France
| | - Cécile Notarnicola
- INSERM ERI 25 “Muscle et Pathologies”, Université Montpellier 1, EA 4202, CHU Arnaud de Villeneuve, Montpellier, France
| | - Pascal de Santa Barbara
- INSERM ERI 25 “Muscle et Pathologies”, Université Montpellier 1, EA 4202, CHU Arnaud de Villeneuve, Montpellier, France
| | - Gérald Hugon
- INSERM ERI 25 “Muscle et Pathologies”, Université Montpellier 1, EA 4202, CHU Arnaud de Villeneuve, Montpellier, France
| | - François Rivier
- INSERM ERI 25 “Muscle et Pathologies”, Université Montpellier 1, EA 4202, CHU Arnaud de Villeneuve, Montpellier, France
| | - Dalila Laoudj-Chenivesse
- INSERM ERI 25 “Muscle et Pathologies”, Université Montpellier 1, EA 4202, CHU Arnaud de Villeneuve, Montpellier, France
| | - Dominique Mornet
- INSERM ERI 25 “Muscle et Pathologies”, Université Montpellier 1, EA 4202, CHU Arnaud de Villeneuve, Montpellier, France
- * E-mail:
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Hnia K, Gayraud J, Hugon G, Ramonatxo M, De La Porte S, Matecki S, Mornet D. L-arginine decreases inflammation and modulates the nuclear factor-kappaB/matrix metalloproteinase cascade in mdx muscle fibers. Am J Pathol 2008; 172:1509-19. [PMID: 18458097 DOI: 10.2353/ajpath.2008.071009] [Citation(s) in RCA: 126] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Duchenne muscular dystrophy (DMD) is a lethal, X-linked disorder associated with dystrophin deficiency that results in chronic inflammation, sarcolemma damage, and severe skeletal muscle degeneration. Recently, the use of L-arginine, the substrate of nitric oxide synthase (nNOS), has been proposed as a pharmacological treatment to attenuate the dystrophic pattern of DMD. However, little is known about signaling events that occur in dystrophic muscle with l-arginine treatment. Considering the implication of inflammation in dystrophic processes, we asked whether L-arginine inhibits inflammatory signaling cascades. We demonstrate that L-arginine decreases inflammation and enhances muscle regeneration in the mdx mouse model. Classic stimulatory signals, such as proinflammatory cytokines interleukin-1beta, interleukin-6, and tumor necrosis factor-alpha, are significantly decreased in mdx mouse muscle, resulting in lower nuclear factor (NF)-kappaB levels and activity. NF-kappaB serves as a pivotal transcription factor with multiple levels of regulation; previous studies have shown perturbation of NF-kappaB signaling in both mdx and DMD muscle. Moreover, L-arginine decreases the activity of metalloproteinase (MMP)-2 and MMP-9, which are transcriptionally activated by NF-kappaB. We show that the inhibitory effect of L-arginine on the NF-kappaB/MMP cascade reduces beta-dystroglycan cleavage and translocates utrophin and nNOS throughout the sarcolemma. Collectively, our results clarify the molecular events by which L-arginine promotes muscle membrane integrity in dystrophic muscle and suggest that NF-kappaB-related signaling cascades could be potential therapeutic targets for DMD management.
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Affiliation(s)
- Karim Hnia
- INSERM ERI 25 Muscle et Pathologies, CHU A. de Villeneuve, Université de Montpellier1, EA 4202, 34295 Montpellier Cedex 5, France
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Gayraud J, Matecki S, Hnia K, Mornet D, Prefaut C, Mercier J, Michel A, Ramonatxo M. Ventilation during air breathing and in response to hypercapnia in 5 and 16 month-old mdx and C57 mice. J Muscle Res Cell Motil 2007; 28:29-37. [PMID: 17431804 PMCID: PMC1974787 DOI: 10.1007/s10974-007-9101-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2006] [Accepted: 02/19/2007] [Indexed: 12/14/2022]
Abstract
Previous studies have shown a blunted ventilatory response to hypercapnia in mdx mice older than 7 months. We test the hypothesis that in the mdx mice ventilatory response changes with age, concomitantly with the increased functional impairment of the respiratory muscles. We thus studied the ventilatory response to CO(2) in 5 and 16 month-old mdx and C57BL10 mice (n = 8 for each group). Respiratory rate (RR), tidal volume (VT), and minute ventilation (VE) were measured, using whole-body plethysmography, during air breathing and in response to hypercapnia (3, 5 and 8% CO(2)). The ventilatory protocol was completed by histological analysis of the diaphragm and intercostals muscles. During air breathing, the 16 month-old mdx mice showed higher RR and, during hypercapnia (at 8% CO(2) breathing), significantly lower RR (226 +/- 26 vs. 270 +/- 21 breaths/min) and VE (1.81 +/- 0.35 vs. 3.96 +/- 0.59 ml min(-1) g(-1)) (P < 0.001) in comparison to C57BL10 controls. On the other hand, 5 month-old C57BL10 and mdx mice did not present any difference in their ventilatory response to air breathing and to hypercapnia. In conclusion, this study shows similar ventilation during air breathing and in response to hypercapnia in the 5 month-old mdx and control mice, in spite of significant pathological structural changes in the respiratory muscles of the mdx mice. However in the 16 month-old mdx mice we observed altered ventilation under air and blunted ventilation response to hypercapnia compared to age-matched control mice. Ventilatory response to hypercapnia thus changes with age in mdx mice, in line with the increased histological damage of their respiratory muscles.
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Hnia K, Hugon G, Rivier F, Masmoudi A, Mercier J, Mornet D. Modulation of p38 mitogen-activated protein kinase cascade and metalloproteinase activity in diaphragm muscle in response to free radical scavenger administration in dystrophin-deficient Mdx mice. Am J Pathol 2007; 170:633-43. [PMID: 17255331 PMCID: PMC1851881 DOI: 10.2353/ajpath.2007.060344] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Duchenne muscular dystrophy muscles undergo increased oxidative stress and altered calcium homeostasis, which contribute to myofiber loss by trigging both necrosis and apoptosis. Here, we asked whether treatment with free radical scavengers could improve the dystrophic pattern of mdx muscles. Five-week-old mdx mice were treated for 2 weeks with alpha-lipoic acid/l-carnitine. This treatment decreased the plasmatic creatine kinase level, the antioxidant enzyme activity, and lipid peroxidation products in mdx diaphragm. Free radical scavengers also modulated the phosphorylation/activity of some component of the mitogen-activated protein kinase (MAPK) cascades: p38 MAPK, the extracellular signal-related kinase, and the Jun kinase. beta-Dystroglycan (beta-DG), a multifunctional adaptor or scaffold capable of interacting with components of the extracellular signal-related kinase-MAP kinase cascade, was also affected after treatment. In the mdx muscles, beta-DG (43 kd) was cleaved by matrix metalloproteinases into a 30-kd form (beta-DG30). We show that the proinflammatory protein nuclear factor-kappaB activator decreased after the treatment, leading to a significant reduction of matrix metalloproteinase activity in the mdx diaphragm. Our data highlight the implication of oxidative stress and cell signaling defects in dystrophin-deficient muscle via the MAP kinase cascade-beta-DG interaction and nuclear factor-kappaB-mediated inflammation process.
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Affiliation(s)
- Karim Hnia
- Institut National de la Santé, et de la Recherche Médicale, Equipe ERI 25, Muscle et Pathologies, Université de Montpellier1, Unité de Formation et de Recherche de Médecine, EA701, 4 Boulevard Henri IV, 34060 Montpellier, France
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Hnia K, Zouiten D, Cantel S, Chazalette D, Hugon G, Fehrentz JA, Masmoudi A, Diment A, Bramham J, Mornet D, Winder S. ZZ domain of dystrophin and utrophin: topology and mapping of a beta-dystroglycan interaction site. Biochem J 2007; 401:667-77. [PMID: 17009962 PMCID: PMC1770854 DOI: 10.1042/bj20061051] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [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] [Indexed: 11/17/2022]
Abstract
Dystrophin forms part of a vital link between actin cytoskeleton and extracellular matrix via the transmembrane adhesion receptor dystroglycan. Dystrophin and its autosomal homologue utrophin interact with beta-dystroglycan via their highly conserved C-terminal cysteine-rich regions, comprising the WW domain (protein-protein interaction domain containing two conserved tryptophan residues), EF hand and ZZ domains. The EF hand region stabilizes the WW domain providing the main interaction site between dystrophin or utrophin and dystroglycan. The ZZ domain, containing a predicted zinc finger motif, stabilizes the WW and EF hand domains and strengthens the overall interaction between dystrophin or utrophin and beta-dystroglycan. Using bacterially expressed ZZ domain, we demonstrate a conformational effect of zinc binding to the ZZ domain, and identify two zinc-binding regions within the ZZ domain by SPOTs overlay assays. Epitope mapping of the dystrophin ZZ domain was carried out with new monoclonal antibodies by ELISA, overlay assay and immunohistochemistry. One monoclonal antibody defined a discrete region of the ZZ domain that interacts with beta-dystroglycan. The epitope was localized to the conformationally sensitive second zinc-binding site in the ZZ domain. Our results suggest that residues 3326-3332 of dystrophin form a crucial part of the contact region between dystrophin and beta-dystroglycan and provide new insight into ZZ domain organization and function.
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Affiliation(s)
- Karim Hnia
- *Université Montpellier 1, Unité de Formation et de Recherche de Médecine, Laboratoire de Physiologie des Interactions, Institut de Biologie, Boulevard Henri IV, F-34062, France
- †Institut Supérieur de Biotechnologie and U.R. (Unité de Recherche) 08/39 Faculté de Médecine, Monastir, Tunisia
| | - Dora Zouiten
- †Institut Supérieur de Biotechnologie and U.R. (Unité de Recherche) 08/39 Faculté de Médecine, Monastir, Tunisia
| | - Sonia Cantel
- ‡Institut Max Mousseron, FR 1886 Laboratoire des Amino-acides, Peptides et Protéines UMR 5810, Faculté de Pharmacie, 15 avenue Charles Flahault, BP 14491, 34093 Montpellier Cédex 5, France
| | - Delphine Chazalette
- *Université Montpellier 1, Unité de Formation et de Recherche de Médecine, Laboratoire de Physiologie des Interactions, Institut de Biologie, Boulevard Henri IV, F-34062, France
| | - Gérald Hugon
- *Université Montpellier 1, Unité de Formation et de Recherche de Médecine, Laboratoire de Physiologie des Interactions, Institut de Biologie, Boulevard Henri IV, F-34062, France
| | - Jean-Alain Fehrentz
- ‡Institut Max Mousseron, FR 1886 Laboratoire des Amino-acides, Peptides et Protéines UMR 5810, Faculté de Pharmacie, 15 avenue Charles Flahault, BP 14491, 34093 Montpellier Cédex 5, France
| | - Ahmed Masmoudi
- †Institut Supérieur de Biotechnologie and U.R. (Unité de Recherche) 08/39 Faculté de Médecine, Monastir, Tunisia
| | - Ann Diment
- §Institute of Cell and Molecular Biology, University of Edinburgh, Mayfield Road, Edinburgh, Scotland, U.K
| | - Janice Bramham
- §Institute of Cell and Molecular Biology, University of Edinburgh, Mayfield Road, Edinburgh, Scotland, U.K
| | - Dominique Mornet
- *Université Montpellier 1, Unité de Formation et de Recherche de Médecine, Laboratoire de Physiologie des Interactions, Institut de Biologie, Boulevard Henri IV, F-34062, France
| | - Steve J. Winder
- ∥Centre for Developmental and Biomedical Genetics, Department of Biomedical Science, University of Sheffield, Firth Court, Western Bank, Sheffield S10 2TN, U.K
- To whom correspondence should be addressed (email )
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Hnia K, Hugon G, Masmoudi A, Mercier J, Rivier F, Mornet D. Effect of beta-dystroglycan processing on utrophin/Dp116 anchorage in normal and mdx mouse Schwann cell membrane. Neuroscience 2006; 141:607-620. [PMID: 16735092 PMCID: PMC1974842 DOI: 10.1016/j.neuroscience.2006.04.043] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2005] [Revised: 04/18/2006] [Accepted: 04/18/2006] [Indexed: 11/23/2022]
Abstract
In the peripheral nervous system, utrophin and the short dystrophin isoform (Dp116) are co-localized at the outermost layer of the myelin sheath of nerve fibers; together with the dystroglycan complex. Dp116 is associated with multiple glycoproteins, i.e. sarcoglycans, and alpha- and beta-dystroglycan, which anchor the cytoplasmic protein subcomplex to the extracellular basal lamina. In peripheral nerve, matrix metalloproteinase activity disrupts the dystroglycan complex by cleaving the extracellular domain of beta-dystroglycan. Metalloproteinase creates a 30 kDa fragment of beta-dystroglycan, leading to a disruption of the link between the extracellular matrix and the cell membrane. Here we asked if the processing of the beta-dystroglycan could influence the anchorage of Dp116 and/or utrophin in normal and mdx Schwann cell membrane. We showed that metalloproteinase-9 was more activated in mdx nerve than in wild-type ones. This activation leads to an accumulation of the 30 kDa beta-dystroglycan isoform and has an impact on the anchorage of Dp116 and utrophin isoforms in mdx Schwann cells membrane. Our results showed that Dp116 had greater affinity to the full length form of beta-dystroglycan than the 30 kDa form. Moreover, we showed for the first time that the short isoform of utrophin (Up71) was over-expressed in mdx Schwann cells compared with wild-type. In addition, this utrophin isoform (Up71) seems to have greater affinity to the 30 kDa beta-dystroglycan which could explain the increased stabilization of this 30 kDa form at the membrane compartment. Our results highlight the potential participation of the short utrophin isoform and the cleaved form of beta-dystroglycan in mdx Schwann cell membrane architecture. We proposed that these two proteins could be implicated in Schwann cell proliferation in response to a microenvironment stress such as mediated by accumulating macrophages in mdx mouse muscle inflammation sites.
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Affiliation(s)
- K Hnia
- Université Montpellier 1, UFR de Médecine, Laboratoire de Physiologie des Interactions, EA 701, Institut de Biologie, 4 Boulevard Henri IV, 34000 Montpellier, France; Institut Supérieur de Biotechnologie and UR. 08/39 Faculté de Médecine, Monastir, Tunisia
| | - G Hugon
- Université Montpellier 1, UFR de Médecine, Laboratoire de Physiologie des Interactions, EA 701, Institut de Biologie, 4 Boulevard Henri IV, 34000 Montpellier, France
| | - A Masmoudi
- Institut Supérieur de Biotechnologie and UR. 08/39 Faculté de Médecine, Monastir, Tunisia
| | - J Mercier
- Université Montpellier 1, UFR de Médecine, Laboratoire de Physiologie des Interactions, EA 701, Institut de Biologie, 4 Boulevard Henri IV, 34000 Montpellier, France
| | - F Rivier
- Université Montpellier 1, UFR de Médecine, Laboratoire de Physiologie des Interactions, EA 701, Institut de Biologie, 4 Boulevard Henri IV, 34000 Montpellier, France
| | - D Mornet
- Université Montpellier 1, UFR de Médecine, Laboratoire de Physiologie des Interactions, EA 701, Institut de Biologie, 4 Boulevard Henri IV, 34000 Montpellier, France.
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Hnia K, Tuffery-Giraud S, Vermaelen M, Hugon G, Chazalette D, Masmoudi A, Rivier F, Mornet D. Pathological pattern of Mdx mice diaphragm correlates with gradual expression of the short utrophin isoform Up71. Biochim Biophys Acta Mol Basis Dis 2006; 1762:362-72. [PMID: 16457992 PMCID: PMC1974843 DOI: 10.1016/j.bbadis.2005.11.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2005] [Revised: 11/16/2005] [Accepted: 11/18/2005] [Indexed: 12/22/2022]
Abstract
Utrophin gene is transcribed in a large mRNA of 13 kb that codes for a protein of 395 kDa. It shows amino acid identity with dystrophin of up to 73% and is widely expressed in muscle and non-muscle tissues. Up71 is a short utrophin product of the utrophin gene with the same cysteine-rich and C-terminal domains as full-length utrophin (Up395). Using RT-PCR, Western blots analysis, we demonstrated that Up71 is overexpressed in the mdx diaphragm, the most pathological muscle in dystrophin-deficient mdx mice, compared to wild-type C57BL/10 or other mdx skeletal muscles. Subsequently, we demonstrated that this isoform displayed an increased expression level up to 12 months, whereas full-length utrophin (Up395) decreased. In addition, beta-dystroglycan, the transmembrane glycoprotein that anchors the cytoplasmic C-terminal domain of utrophin, showed similar increase expression in mdx diaphragm, as opposed to other components of the dystrophin-associated protein complex (DAPC) such as alpha-dystrobrevin1 and alpha-sarcoglycan. We demonstrated that Up71 and beta-dystroglycan were progressively accumulated along the extrasynaptic region of regenerating clusters in mdx diaphragm. Our data provide novel functional insights into the pathological role of the Up71 isoform in dystrophinopathies.
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Affiliation(s)
- Karim Hnia
- Laboratoire de Physiologie des Interactions
EA 701Université Montpellier 1Institut de Biologie
Boulevard Henri IV
34060 Montpellier,FR
- Institut Supérieur de Biotechnologie
Faculté de MédecineMonastir,TN
| | - Sylvie Tuffery-Giraud
- Laboratoire de génétique des maladies rares. Pathologie moléculaire, études fonctionnelles et banque de données génétiques
INSERM : U827 IFR3Université Montpellier IIURC
CHU de Montpellier
34093 MONTPELLIER ,FR
| | - Marianne Vermaelen
- Laboratoire de Physiologie des Interactions
EA 701Université Montpellier 1Institut de Biologie
Boulevard Henri IV
34060 Montpellier,FR
| | - Gerald Hugon
- Laboratoire de Physiologie des Interactions
EA 701Université Montpellier 1Institut de Biologie
Boulevard Henri IV
34060 Montpellier,FR
| | - Delphine Chazalette
- Laboratoire de Physiologie des Interactions
EA 701Université Montpellier 1Institut de Biologie
Boulevard Henri IV
34060 Montpellier,FR
| | - Ahmed Masmoudi
- Institut Supérieur de Biotechnologie
Faculté de MédecineMonastir,TN
| | - François Rivier
- Laboratoire de Physiologie des Interactions
EA 701Université Montpellier 1Institut de Biologie
Boulevard Henri IV
34060 Montpellier,FR
| | - Dominique Mornet
- Laboratoire de Physiologie des Interactions
EA 701Université Montpellier 1Institut de Biologie
Boulevard Henri IV
34060 Montpellier,FR
- * Correspondence should be adressed to: Dominique Mornet
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Chazalette D, Hnia K, Rivier F, Hugon G, Mornet D. alpha7B integrin changes in mdx mouse muscles after L-arginine administration. FEBS Lett 2005; 579:1079-84. [PMID: 15710394 DOI: 10.1016/j.febslet.2004.12.081] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2004] [Revised: 12/22/2004] [Accepted: 12/31/2004] [Indexed: 11/30/2022]
Abstract
Muscle fibers attach to laminin in the basal lamina using two mechanisms, i.e., dystrophin with its associated proteins and alpha7beta1 integrin. In humans, gene-mutation defects in one member of these complexes result in muscular dystrophies. This study revealed changes after L-arginine treatment of utrophin-associated proteins and the alpha7B integrin subunit in mdx mouse, a dystrophin-deficient animal model. In the two studied muscles (cardiac muscle and diaphragm), the alpha7B integrin subunit was increased in 5-week-old treated mice. Interestingly, the diaphragm histopathological appearance was significantly improved by L-arginine administration. These results highlight a possible way to compensate for dystrophin deficiency via alpha7beta1 integrin.
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Affiliation(s)
- Delphine Chazalette
- EA 701, Muscles et Pathologies Chroniques, Institut de Biologie, Boulevard Henri IV, 34060 Montpellier, France
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