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Severin S, Gratacap MP, Bouvet L, Borret M, Kpotor AO, Chicanne G, Xuereb JM, Viaud J, Payrastre B. Phosphoinositides take a central stage in regulating blood platelet production and function. Adv Biol Regul 2024; 91:100992. [PMID: 37793962 DOI: 10.1016/j.jbior.2023.100992] [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] [Received: 09/18/2023] [Accepted: 09/25/2023] [Indexed: 10/06/2023]
Abstract
Blood platelets are produced by megakaryocytes through a complex program of differentiation and play a critical role in hemostasis and thrombosis. These anucleate cells are the target of antithrombotic drugs that prevent them from clumping in cardiovascular disease conditions. Platelets also significantly contribute to various aspects of physiopathology, including interorgan communications, healing, inflammation, and thromboinflammation. Their production and activation are strictly regulated by highly elaborated mechanisms. Among them, those involving inositol lipids have drawn the attention of researchers. Phosphoinositides represent the seven combinatorially phosphorylated forms of the inositol head group of inositol lipids. They play a crucial role in regulating intracellular mechanisms, such as signal transduction, actin cytoskeleton rearrangements, and membrane trafficking, either by generating second messengers or by directly binding to specific domains of effector proteins. In this review, we will explore how phosphoinositides are implicated in controlling platelet production by megakaryocytes and in platelet activation processes. We will also discuss the diversity of phosphoinositides in platelets, their role in granule biogenesis and maintenance, as well as in integrin signaling. Finally, we will address the discovery of a novel pool of phosphatidylinositol 3-monophosphate in the outerleaflet of the plasma membrane of human and mouse platelets.
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Affiliation(s)
- Sonia Severin
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297 and Université Paul Sabatier, F-31432, Toulouse, France
| | - Marie-Pierre Gratacap
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297 and Université Paul Sabatier, F-31432, Toulouse, France
| | - Laura Bouvet
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297 and Université Paul Sabatier, F-31432, Toulouse, France
| | - Maxime Borret
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297 and Université Paul Sabatier, F-31432, Toulouse, France
| | - Afi Oportune Kpotor
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297 and Université Paul Sabatier, F-31432, Toulouse, France
| | - Gaëtan Chicanne
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297 and Université Paul Sabatier, F-31432, Toulouse, France
| | - Jean-Marie Xuereb
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297 and Université Paul Sabatier, F-31432, Toulouse, France
| | - Julien Viaud
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297 and Université Paul Sabatier, F-31432, Toulouse, France
| | - Bernard Payrastre
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), INSERM UMR-1297 and Université Paul Sabatier, F-31432, Toulouse, France; Laboratoire d'Hématologie, Centre de Référence des Pathologies Plaquettaires, Centre Hospitalier Universitaire de Toulouse Rangueil, F-31432, Toulouse, France.
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Chicanne G, Darcourt J, Bertrand-Michel J, Garcia C, Ribes A, Payrastre B. What can we learn from the platelet lipidome? Platelets 2023; 34:2182180. [PMID: 36880158 DOI: 10.1080/09537104.2023.2182180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
Besides their proteome, platelets use, in all responses to the environmental cues, a huge and diverse family of hydrophobic and amphipathic small molecules involved in structural, metabolic and signaling functions; the lipids. Studying how platelet lipidome changes modulate platelet function is an old story constantly renewed through the impressive technical advances allowing the discovery of new lipids, functions and metabolic pathways. Technical progress in analytical lipidomic profiling by top-of-the-line approaches such as nuclear magnetic resonance and gas chromatography or liquid chromatography coupled to mass spectrometry enables either large-scale analysis of lipids or targeted lipidomics. With the support of bioinformatics tools and databases, it is now possible to investigate thousands of lipids over a concentration range of several orders of magnitude. The lipidomic landscape of platelets is considered a treasure trove, not only able to expand our knowledge of platelet biology and pathologies but also to bring diagnostic and therapeutic opportunities. The aim of this commentary article is to summarize the advances in the field and to highlight what lipidomics can tell us about platelet biology and pathophysiology.
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Affiliation(s)
- Gaëtan Chicanne
- Institute of Metabolic and Cardiovascular Disease, Inserm UMR1297 and University of Toulouse 3, Toulouse, France
| | - Jean Darcourt
- Institute of Metabolic and Cardiovascular Disease, Inserm UMR1297 and University of Toulouse 3, Toulouse, France
| | - Justine Bertrand-Michel
- Institute of Metabolic and Cardiovascular Disease, Inserm UMR1297 and University of Toulouse 3, Toulouse, France.,MetaboHUB-MetaToul, National Infrastructure of Metabolomics and Fluxomics, Toulouse, France
| | - Cédric Garcia
- Institute of Metabolic and Cardiovascular Disease, Inserm UMR1297 and University of Toulouse 3, Toulouse, France.,Laboratory of Haematology, University Hospital of Toulouse, Toulouse, France
| | - Agnès Ribes
- Institute of Metabolic and Cardiovascular Disease, Inserm UMR1297 and University of Toulouse 3, Toulouse, France.,Laboratory of Haematology, University Hospital of Toulouse, Toulouse, France
| | - Bernard Payrastre
- Institute of Metabolic and Cardiovascular Disease, Inserm UMR1297 and University of Toulouse 3, Toulouse, France.,Laboratory of Haematology, University Hospital of Toulouse, Toulouse, 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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Severin S, Consonni A, Chicanne G, Allart S, Payrastre B, Gratacap MP. SHIP1 Controls Internal Platelet Contraction and α IIbβ 3 Integrin Dynamics in Early Platelet Activation. Int J Mol Sci 2023; 24:ijms24020958. [PMID: 36674478 PMCID: PMC9860818 DOI: 10.3390/ijms24020958] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/20/2022] [Accepted: 12/21/2022] [Indexed: 01/06/2023] Open
Abstract
The Src homology 2 domain-containing inositol 5-phosphatase 1 (SHIP1) is known to dephosphorylate PtdIns(3,4,5)P3 into PtdIns(3,4)P2 and to interact with several signaling proteins though its docking functions. It has been shown to negatively regulate platelet adhesion and spreading on a fibrinogen surface and to positively regulate thrombus growth. In the present study, we have investigated its role during the early phase of platelet activation. Using confocal-based morphometric analysis, we found that SHIP1 is involved in the regulation of cytoskeletal organization and internal contractile activity in thrombin-activated platelets. The absence of SHIP1 has no significant impact on thrombin-induced Akt or Erk1/2 activation, but it selectively affects the RhoA/Rho-kinase pathway and myosin IIA relocalization to the cytoskeleton. SHIP1 interacts with the spectrin-based membrane skeleton, and its absence induces a loss of sustained association of integrins to this network together with a decrease in αIIbβ3 integrin clustering following thrombin stimulation. This αIIbβ3 integrin dynamics requires the contractile cytoskeleton under the control of SHIP1. RhoA activation, internal platelet contraction, and membrane skeleton integrin association were insensitive to the inhibition of PtdIns(3,4,5)P3 synthesis or SHIP1 phosphatase activity, indicating a role for the docking properties of SHIP1 in these processes. Altogether, our data reveal a lipid-independent function for SHIP1 in the regulation of the contractile cytoskeleton and integrin dynamics in platelets.
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Affiliation(s)
- Sonia Severin
- Institut des Maladies Métabolique et Cardiovasculaire (I2MC), Inserm and Université Toulouse III Paul-Sabatier (UMR-1297), 1 Avenue J. Poulhes, CEDEX 4, 31432 Toulouse, France
- Correspondence: (S.S.); (M.-P.G.); Tel.: +33-5-31-22-41-43 (S.S.); +33-5-31-22-41-50 (M.-P.G.)
| | - Alessandra Consonni
- Institut des Maladies Métabolique et Cardiovasculaire (I2MC), Inserm and Université Toulouse III Paul-Sabatier (UMR-1297), 1 Avenue J. Poulhes, CEDEX 4, 31432 Toulouse, France
- Laboratory of Biochemistry, Department of Biology and Biotechnology “L. Spallanzani”, University of Pavia, 27100 Pavia, Italy
| | - Gaëtan Chicanne
- Institut des Maladies Métabolique et Cardiovasculaire (I2MC), Inserm and Université Toulouse III Paul-Sabatier (UMR-1297), 1 Avenue J. Poulhes, CEDEX 4, 31432 Toulouse, France
| | - Sophie Allart
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (Infinity), Université Toulouse III Paul-Sabatier and Inserm (UMR-1291) and CNRS (UMR-5051), Centre Hospitalier Universitaire Purpan, CEDEX 3, 31024 Toulouse, France
| | - Bernard Payrastre
- Institut des Maladies Métabolique et Cardiovasculaire (I2MC), Inserm and Université Toulouse III Paul-Sabatier (UMR-1297), 1 Avenue J. Poulhes, CEDEX 4, 31432 Toulouse, France
- Laboratoire d’Hématologie, Centre de Référence des Pathologies Plaquettaires, Centre Hospitalier Universitaire Rangueil, CEDEX 4, 31432 Toulouse, France
| | - Marie-Pierre Gratacap
- Institut des Maladies Métabolique et Cardiovasculaire (I2MC), Inserm and Université Toulouse III Paul-Sabatier (UMR-1297), 1 Avenue J. Poulhes, CEDEX 4, 31432 Toulouse, France
- Correspondence: (S.S.); (M.-P.G.); Tel.: +33-5-31-22-41-43 (S.S.); +33-5-31-22-41-50 (M.-P.G.)
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Volpatti JR, Ghahramani-Seno MM, Mansat M, Sabha N, Sarikaya E, Goodman SJ, Chater-Diehl E, Celik A, Pannia E, Froment C, Combes-Soia L, Maani N, Yuki KE, Chicanne G, Uusküla-Reimand L, Monis S, Alvi SA, Genetti CA, Payrastre B, Beggs AH, Bonnemann CG, Muntoni F, Wilson MD, Weksberg R, Viaud J, Dowling JJ. X-linked myotubular myopathy is associated with epigenetic alterations and is ameliorated by HDAC inhibition. Acta Neuropathol 2022; 144:537-563. [PMID: 35844027 PMCID: PMC9381459 DOI: 10.1007/s00401-022-02468-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 07/04/2022] [Accepted: 07/04/2022] [Indexed: 12/29/2022]
Abstract
X-linked myotubular myopathy (XLMTM) is a fatal neuromuscular disorder caused by loss of function mutations in MTM1. At present, there are no directed therapies for XLMTM, and incomplete understanding of disease pathomechanisms. To address these knowledge gaps, we performed a drug screen in mtm1 mutant zebrafish and identified four positive hits, including valproic acid, which functions as a potent suppressor of the mtm1 zebrafish phenotype via HDAC inhibition. We translated these findings to a mouse XLMTM model, and showed that valproic acid ameliorates the murine phenotype. These observations led us to interrogate the epigenome in Mtm1 knockout mice; we found increased DNA methylation, which is normalized with valproic acid, and likely mediated through aberrant 1-carbon metabolism. Finally, we made the unexpected observation that XLMTM patients share a distinct DNA methylation signature, suggesting that epigenetic alteration is a conserved disease feature amenable to therapeutic intervention.
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Caux M, Mansour R, Xuereb JM, Chicanne G, Viaud J, Vauclard A, Boal F, Payrastre B, Tronchère H, Severin S. PIKfyve-Dependent Phosphoinositide Dynamics in Megakaryocyte/Platelet Granule Integrity and Platelet Functions. Arterioscler Thromb Vasc Biol 2022; 42:987-1004. [PMID: 35708031 DOI: 10.1161/atvbaha.122.317559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Secretory granules are key elements for platelet functions. Their biogenesis and integrity are regulated by fine-tuned mechanisms that need to be fully characterized. Here, we investigated the role of the phosphoinositide 5-kinase PIKfyve and its lipid products, PtdIns5P (phosphatidylinositol 5 monophosphate) and PtdIns(3,5)P2 (phosphatidylinositol (3,5) bisphosphate) in granule homeostasis in megakaryocytes and platelets. METHODS For that, we invalidated PIKfyve by pharmacological inhibition or gene silencing in megakaryocytic cell models (human MEG-01 cell line, human imMKCLs, mouse primary megakaryocytes) and in human platelets. RESULTS We unveiled that PIKfyve expression and its lipid product levels increased with megakaryocytic maturation. In megakaryocytes, PtdIns5P and PtdIns(3,5)P2 were found in alpha and dense granule membranes with higher levels in dense granules. Pharmacological inhibition or knock-down of PIKfyve in megakaryocytes decreased PtdIns5P and PtdIns(3,5)P2 synthesis and induced a vacuolar phenotype with a loss of alpha and dense granule identity. Permeant PtdIns5P and PtdIns(3,5)P2 and the cation channel TRPML1 (transient receptor potential mucolipins) and TPC2 activation were able to accelerate alpha and dense granule integrity recovery following release of PIKfyve pharmacological inhibition. In platelets, PIKfyve inhibition specifically impaired the integrity of dense granules culminating in defects in their secretion, platelet aggregation, and thrombus formation. CONCLUSIONS These data demonstrated that PIKfyve and its lipid products PtdIns5P and PtdIns(3,5)P2 control granule integrity both in megakaryocytes and platelets.
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Affiliation(s)
- Manuella Caux
- INSERM U1297, I2MC and Université Paul Sabatier, Toulouse, France (M.C., R.M., J.-M.X., G.C., J.V., A.V., F.B., B.P., H.T., S.S.)
| | - Rana Mansour
- INSERM U1297, I2MC and Université Paul Sabatier, Toulouse, France (M.C., R.M., J.-M.X., G.C., J.V., A.V., F.B., B.P., H.T., S.S.)
| | - Jean-Marie Xuereb
- INSERM U1297, I2MC and Université Paul Sabatier, Toulouse, France (M.C., R.M., J.-M.X., G.C., J.V., A.V., F.B., B.P., H.T., S.S.)
| | - Gaëtan Chicanne
- INSERM U1297, I2MC and Université Paul Sabatier, Toulouse, France (M.C., R.M., J.-M.X., G.C., J.V., A.V., F.B., B.P., H.T., S.S.)
| | - Julien Viaud
- INSERM U1297, I2MC and Université Paul Sabatier, Toulouse, France (M.C., R.M., J.-M.X., G.C., J.V., A.V., F.B., B.P., H.T., S.S.)
| | - Alicia Vauclard
- INSERM U1297, I2MC and Université Paul Sabatier, Toulouse, France (M.C., R.M., J.-M.X., G.C., J.V., A.V., F.B., B.P., H.T., S.S.)
| | - Frédéric Boal
- INSERM U1297, I2MC and Université Paul Sabatier, Toulouse, France (M.C., R.M., J.-M.X., G.C., J.V., A.V., F.B., B.P., H.T., S.S.)
| | - Bernard Payrastre
- INSERM U1297, I2MC and Université Paul Sabatier, Toulouse, France (M.C., R.M., J.-M.X., G.C., J.V., A.V., F.B., B.P., H.T., S.S.).,CHU de Toulouse, Laboratoire d'Hématologie, Toulouse, France (B.P.)
| | - Hélène Tronchère
- INSERM U1297, I2MC and Université Paul Sabatier, Toulouse, France (M.C., R.M., J.-M.X., G.C., J.V., A.V., F.B., B.P., H.T., S.S.)
| | - Sonia Severin
- INSERM U1297, I2MC and Université Paul Sabatier, Toulouse, France (M.C., R.M., J.-M.X., G.C., J.V., A.V., F.B., B.P., H.T., S.S.)
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7
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Oprescu A, Michel D, Antkowiak A, Vega E, Viaud J, Courtneidge SA, Eckly A, de la Salle H, Chicanne G, Léon C, Payrastre B, Gaits-Iacovoni F. Megakaryocytes form linear podosomes devoid of digestive properties to remodel medullar matrix. Sci Rep 2022; 12:6255. [PMID: 35428815 PMCID: PMC9012751 DOI: 10.1038/s41598-022-10215-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 04/01/2022] [Indexed: 12/20/2022] Open
Abstract
Bone marrow megakaryocytes (MKs) undergo a maturation involving contacts with the microenvironment before extending proplatelets through sinusoids to deliver platelets in the bloodstream. We demonstrated that MKs assemble linear F-actin-enriched podosomes on collagen I fibers. Microscopy analysis evidenced an inverse correlation between the number of dot-like versus linear podosomes over time. Confocal videomicroscopy confirmed that they derived from each-other. This dynamics was dependent on myosin IIA. Importantly, MKs progenitors expressed the Tks4/5 adaptors, displayed a strong gelatinolytic ability and did not form linear podosomes. While maturing, MKs lost Tks expression together with digestive ability. However, those MKs were still able to remodel the matrix by exerting traction on collagen I fibers through a collaboration between GPVI, ß1 integrin and linear podosomes. Our data demonstrated that a change in structure and composition of podosomes accounted for the shift of function during megakaryopoiesis. These data highlight the fact that members of the invadosome family could correspond to different maturation status of the same entity, to adapt to functional responses required by differentiation stages of the cell that bears them.
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Affiliation(s)
- Antoine Oprescu
- INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Déborah Michel
- INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Adrien Antkowiak
- INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Elodie Vega
- INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Julien Viaud
- INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Sara A Courtneidge
- Department of Cell, Development and Cancer Biology, Oregon Health & Science University, Oregon, USA
| | - Anita Eckly
- INSERM, UMR_S1255, Université de Strasbourg, Etablissement Français du Sang-GEST, Strasbourg, France
| | - Henri de la Salle
- INSERM, UMR_S1255, Université de Strasbourg, Etablissement Français du Sang-GEST, Strasbourg, France
| | - Gaëtan Chicanne
- INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Catherine Léon
- INSERM, UMR_S1255, Université de Strasbourg, Etablissement Français du Sang-GEST, Strasbourg, France
| | - Bernard Payrastre
- INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France.,CHU de Toulouse, laboratoire d'Hématologie, Toulouse, France
| | - Frédérique Gaits-Iacovoni
- INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France. .,Molecular, Cellular and Developmental Biology Department (MCD, UMR5077), Centre de Biologie Intégrative (CBI, FR3743), University of Toulouse, CNRS, UPS, 31062, Toulouse, France.
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8
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Selvadurai MV, Moon MJ, Mountford SJ, Ma X, Zheng Z, Jennings IG, Setiabakti NM, Iman RP, Brazilek RJ, Z Abidin NA, Chicanne G, Severin S, Nicholls AJ, Wong CHY, Rinckel JY, Eckly A, Gachet C, Nesbitt WS, Thompson PE, Hamilton JR. Disrupting the platelet internal membrane via PI3KC2α inhibition impairs thrombosis independently of canonical platelet activation. Sci Transl Med 2021; 12:12/553/eaar8430. [PMID: 32718993 DOI: 10.1126/scitranslmed.aar8430] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 03/12/2020] [Accepted: 06/05/2020] [Indexed: 12/17/2022]
Abstract
Arterial thrombosis causes heart attacks and most strokes and is the most common cause of death in the world. Platelets are the cells that form arterial thrombi, and antiplatelet drugs are the mainstay of heart attack and stroke prevention. Yet, current drugs have limited efficacy, preventing fewer than 25% of lethal cardiovascular events without clinically relevant effects on bleeding. The key limitation on the ability of all current drugs to impair thrombosis without causing bleeding is that they block global platelet activation, thereby indiscriminately preventing platelet function in hemostasis and thrombosis. Here, we identify an approach with the potential to overcome this limitation by preventing platelet function independently of canonical platelet activation and in a manner that appears specifically relevant in the setting of thrombosis. Genetic or pharmacological targeting of the class II phosphoinositide 3-kinase (PI3KC2α) dilates the internal membrane reserve of platelets but does not affect activation-dependent platelet function in standard tests. Despite this, inhibition of PI3KC2α is potently antithrombotic in human blood ex vivo and mice in vivo and does not affect hemostasis. Mechanistic studies reveal this antithrombotic effect to be the result of impaired platelet adhesion driven by pronounced hemodynamic shear stress gradients. These findings demonstrate an important role for PI3KC2α in regulating platelet structure and function via a membrane-dependent mechanism and suggest that drugs targeting the platelet internal membrane may be a suitable approach for antithrombotic therapies with an improved therapeutic window.
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Affiliation(s)
- Maria V Selvadurai
- Australian Centre for Blood Diseases, Monash University, Melbourne, VIC 3004, Australia
| | - Mitchell J Moon
- Australian Centre for Blood Diseases, Monash University, Melbourne, VIC 3004, Australia
| | - Simon J Mountford
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Xiao Ma
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Zhaohua Zheng
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Ian G Jennings
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Natasha M Setiabakti
- Australian Centre for Blood Diseases, Monash University, Melbourne, VIC 3004, Australia.,Faculty of Medicine, Universitas Indonesia, Salemba, Jakarta 10430, Indonesia
| | - Rizani P Iman
- Australian Centre for Blood Diseases, Monash University, Melbourne, VIC 3004, Australia.,Faculty of Medicine, Universitas Indonesia, Salemba, Jakarta 10430, Indonesia
| | - Rose J Brazilek
- Australian Centre for Blood Diseases, Monash University, Melbourne, VIC 3004, Australia
| | - Nurul Aisha Z Abidin
- Australian Centre for Blood Diseases, Monash University, Melbourne, VIC 3004, Australia
| | - Gaëtan Chicanne
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm U1048, Université Toulouse III, 31432 Toulouse CEDEX 4, France
| | - Sonia Severin
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm U1048, Université Toulouse III, 31432 Toulouse CEDEX 4, France
| | - Alyce J Nicholls
- Centre for Inflammatory Diseases, Department of Medicine, Monash Medical Centre, Monash University, Clayton, VIC 3800, Australia
| | - Connie H Y Wong
- Centre for Inflammatory Diseases, Department of Medicine, Monash Medical Centre, Monash University, Clayton, VIC 3800, Australia
| | - Jean-Yves Rinckel
- Université de Strasbourg, INSERM, EFS Grand Est, BPPS UMR-S 1255, FMTS, F-67000 Strasbourg, France
| | - Anita Eckly
- Université de Strasbourg, INSERM, EFS Grand Est, BPPS UMR-S 1255, FMTS, F-67000 Strasbourg, France
| | - Christian Gachet
- Université de Strasbourg, INSERM, EFS Grand Est, BPPS UMR-S 1255, FMTS, F-67000 Strasbourg, France
| | - Warwick S Nesbitt
- Australian Centre for Blood Diseases, Monash University, Melbourne, VIC 3004, Australia.,Microplatforms Research Group, School of Engineering, RMIT University, Melbourne, VIC 3000, Australia
| | - Philip E Thompson
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Justin R Hamilton
- Australian Centre for Blood Diseases, Monash University, Melbourne, VIC 3004, Australia.
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9
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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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10
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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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11
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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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12
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Briand-Mésange F, Pons V, Allart S, Masquelier J, Chicanne G, Beton N, Payrastre B, Muccioli GG, Ausseil J, Davignon JL, Salles JP, Chap H. Glycerophosphodiesterase 3 (GDE3) is a lysophosphatidylinositol-specific ectophospholipase C acting as an endocannabinoid signaling switch. J Biol Chem 2020; 295:15767-15781. [PMID: 32917725 DOI: 10.1074/jbc.ra120.015278] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 09/03/2020] [Indexed: 12/11/2022] Open
Abstract
Endocannabinoid signaling plays a regulatory role in various (neuro)biological functions. 2-arachidonoylglycerol (2-AG) is the most abundant endocannabinoid, and although its canonical biosynthetic pathway involving phosphoinositide-specific phospholipase C and diacylglycerol lipase α is known, alternative pathways remain unsettled. Here, we characterize a noncanonical pathway implicating glycerophosphodiesterase 3 (GDE3, from GDPD2 gene). Human GDE3 expressed in HEK293T cell membranes catalyzed the conversion of lysophosphatidylinositol (LPI) into monoacylglycerol and inositol-1-phosphate. The enzyme was equally active against 1-acyl and 2-acyl LPI. When using 2-acyl LPI, where arachidonic acid is the predominant fatty acid, LC-MS analysis identified 2-AG as the main product of LPI hydrolysis by GDE3. Furthermore, inositol-1-phosphate release into the medium occurred upon addition of LPI to intact cells, suggesting that GDE3 is actually an ecto-lysophospholipase C. In cells expressing G-protein-coupled receptor GPR55, GDE3 abolished 1-acyl LPI-induced signaling. In contrast, upon simultaneous ex-pression of GDE3 and cannabinoid receptor CB2, 2-acyl LPI evoked the same signal as that induced by 2-AG. These data strongly suggest that, in addition to degrading the GPR55 LPI ligand, GDE3 can act as a switch between GPR55 and CB2 signaling. Coincident with a major expression of both GDE3 and CB2 in the spleen, spleens from transgenic mice lacking GDE3 displayed doubling of LPI content compared with WT mice. Decreased production of 2-AG in whole spleen was also observed, supporting the in vivo relevance of our findings. These data thus open a new research avenue in the field of endocannabinoid generation and reinforce the view of GPR55 and LPI being genuine actors of the endocannabinoid system.
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Affiliation(s)
- Fabienne Briand-Mésange
- Center for Physiopathology of Toulouse Purpan, University of Toulouse, Toulouse, France; National Center for Scientific Research, Toulouse, France; National Institute of Health and Medical Research, Paul Sabatier University, Toulouse, France
| | - Véronique Pons
- Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; National Institute of Health and Medical Research, Paul Sabatier University, Toulouse, France
| | - Sophie Allart
- Center for Physiopathology of Toulouse Purpan, University of Toulouse, Toulouse, France; National Center for Scientific Research, Toulouse, France; National Institute of Health and Medical Research, Paul Sabatier University, Toulouse, France
| | - Julien Masquelier
- Bioanalysis and Pharmacology of Bioactive Lipids Research Group, Louvain Drug Research Institute, Catholic University of Louvain, Brussels, Belgium
| | - Gaëtan Chicanne
- Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; National Institute of Health and Medical Research, Paul Sabatier University, Toulouse, France
| | - Nicolas Beton
- Center for Physiopathology of Toulouse Purpan, University of Toulouse, Toulouse, France; National Center for Scientific Research, Toulouse, France; National Institute of Health and Medical Research, Paul Sabatier University, Toulouse, France
| | - Bernard Payrastre
- Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; National Institute of Health and Medical Research, Paul Sabatier University, Toulouse, France
| | - Giulio G Muccioli
- Bioanalysis and Pharmacology of Bioactive Lipids Research Group, Louvain Drug Research Institute, Catholic University of Louvain, Brussels, Belgium
| | - Jérôme Ausseil
- Center for Physiopathology of Toulouse Purpan, University of Toulouse, Toulouse, France; National Center for Scientific Research, Toulouse, France; National Institute of Health and Medical Research, Paul Sabatier University, Toulouse, France
| | - Jean-Luc Davignon
- Center for Physiopathology of Toulouse Purpan, University of Toulouse, Toulouse, France; National Center for Scientific Research, Toulouse, France; National Institute of Health and Medical Research, Paul Sabatier University, Toulouse, France
| | - Jean-Pierre Salles
- Center for Physiopathology of Toulouse Purpan, University of Toulouse, Toulouse, France; National Center for Scientific Research, Toulouse, France; National Institute of Health and Medical Research, Paul Sabatier University, Toulouse, France
| | - Hugues Chap
- Center for Physiopathology of Toulouse Purpan, University of Toulouse, Toulouse, France; National Center for Scientific Research, Toulouse, France; National Institute of Health and Medical Research, Paul Sabatier University, Toulouse, France.
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13
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Bellio M, Caux M, Vauclard A, Chicanne G, Gratacap MP, Terrisse AD, Severin S, Payrastre B. Phosphatidylinositol 3 monophosphate metabolizing enzymes in blood platelet production and in thrombosis. Adv Biol Regul 2019; 75:100664. [PMID: 31604685 DOI: 10.1016/j.jbior.2019.100664] [Citation(s) in RCA: 3] [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] [Received: 09/02/2019] [Revised: 09/19/2019] [Accepted: 09/30/2019] [Indexed: 02/09/2023]
Abstract
Blood platelets, produced by the fragmentation of megakaryocytes, play a key role in hemostasis and thrombosis. Being implicated in atherothrombosis and other thromboembolic disorders, they represent a major therapeutic target for antithrombotic drug development. Several recent studies have highlighted an important role for the lipid phosphatidylinositol 3 monophosphate (PtdIns3P) in megakaryocytes and platelets. PtdIns3P, present in small amounts in mammalian cells, is involved in the control of endocytic trafficking and autophagy. Its metabolism is finely regulated by specific kinases and phosphatases. Class II (α, β and γ) and III (Vps34) phosphoinositide-3-kinases (PI3Ks), INPP4 and Fig4 are involved in the production of PtdIns3P whereas PIKFyve, myotubularins (MTMs) and type II PIPK metabolize PtdIns3P. By regulating the turnover of different pools of PtdIns3P, class II (PI3KC2α) and class III (Vps34) PI3Ks have been recently involved in the regulation of platelet production and functions. These pools of PtdIns3P appear to modulate membrane organization and intracellular trafficking. Moreover, PIKFyve and INPP4 have been recently implicated in arterial thrombosis. In this review, we will discuss the role of PtdIns3P metabolizing enzymes in platelet production and function. Potential new anti-thrombotic therapeutic perspectives based on inhibitors targeting specifically PtdIns3P metabolizing enzymes will also be commented.
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Affiliation(s)
- Marie Bellio
- Inserm U1048 and Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Manuella Caux
- Inserm U1048 and Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Alicia Vauclard
- Inserm U1048 and Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Gaëtan Chicanne
- Inserm U1048 and Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Marie-Pierre Gratacap
- Inserm U1048 and Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Anne-Dominique Terrisse
- Inserm U1048 and Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Sonia Severin
- Inserm U1048 and Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Bernard Payrastre
- Inserm U1048 and Université Paul Sabatier, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France; Laboratoire d'Hématologie, Hopital Universitaire de Toulouse, Toulouse, France.
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14
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Mujalli A, Chicanne G, Bertrand-Michel J, Viars F, Stephens L, Hawkins P, Viaud J, Gaits-Iacovoni F, Severin S, Gratacap MP, Terrisse AD, Payrastre B. Profiling of phosphoinositide molecular species in human and mouse platelets identifies new species increasing following stimulation. Biochim Biophys Acta Mol Cell Biol Lipids 2018; 1863:1121-1131. [PMID: 29902570 DOI: 10.1016/j.bbalip.2018.06.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 05/15/2018] [Accepted: 06/10/2018] [Indexed: 12/17/2022]
Abstract
Phosphoinositides are bioactive lipids essential in the regulation of cell signaling as well as cytoskeleton and membrane dynamics. Their metabolism is highly active in blood platelets where they play a critical role during activation, at least through two well identified pathways involving phospholipase C and phosphoinositide 3-kinases (PI3K). Here, using a sensitive high-performance liquid chromatography-mass spectrometry method recently developed, we monitored for the first time the profiling of phosphatidylinositol (PI), PIP, PIP2 and PIP3 molecular species (fatty-acyl profiles) in human and mouse platelets during the course of stimulation by thrombin and collagen-related peptide. Furthermore, using class IA PI3K p110α or p110β deficient mouse platelets and a pharmacological inhibitor, we show the crucial role of p110β and the more subtle role of p110α in the production of PIP3 molecular species following stimulation. This comprehensive platelet phosphoinositides profiling provides important resources for future studies and reveals new information on phosphoinositides biology, similarities and differences in mouse and human platelets and unexpected dramatic increase in low-abundance molecular species of PIP2 during stimulation, opening new perspectives in phosphoinositide signaling in platelets.
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Affiliation(s)
| | - Gaëtan Chicanne
- INSERM U1048, I2MC, Université Paul Sabatier, 31432 Toulouse, France
| | - Justine Bertrand-Michel
- MetaToul-Lipidomic Core Facility, MetaboHUB, INSERM UMR-1048, Université Paul Sabatier, 31432 Toulouse, France
| | - Fanny Viars
- MetaToul-Lipidomic Core Facility, MetaboHUB, INSERM UMR-1048, Université Paul Sabatier, 31432 Toulouse, France
| | - Len Stephens
- Signalling Programme, Babraham Institute, Cambridge, United Kingdom
| | - Phil Hawkins
- Signalling Programme, Babraham Institute, Cambridge, United Kingdom
| | - Julien Viaud
- INSERM U1048, I2MC, Université Paul Sabatier, 31432 Toulouse, France
| | | | - Sonia Severin
- INSERM U1048, I2MC, Université Paul Sabatier, 31432 Toulouse, France
| | | | | | - Bernard Payrastre
- INSERM U1048, I2MC, Université Paul Sabatier, 31432 Toulouse, France; CHU de Toulouse, Laboratoire d'Hématologie, 31059 Toulouse Cedex 03, France.
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15
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Chouaki Benmansour N, Ruminski K, Sartre AM, Phelipot MC, Salles A, Bergot E, Wu A, Chicanne G, Fallet M, Brustlein S, Billaudeau C, Formisano A, Mailfert S, Payrastre B, Marguet D, Brasselet S, Hamon Y, He HT. Phosphoinositides regulate the TCR/CD3 complex membrane dynamics and activation. Sci Rep 2018; 8:4966. [PMID: 29563576 PMCID: PMC5862878 DOI: 10.1038/s41598-018-23109-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 03/05/2018] [Indexed: 01/06/2023] Open
Abstract
Phosphoinositides (PIs) play important roles in numerous membrane-based cellular activities. However, their involvement in the mechanism of T cell receptor (TCR) signal transduction across the plasma membrane (PM) is poorly defined. Here, we investigate their role, and in particular that of phosphatidylinositol 4,5-bisphosphate [PI(4,5)P2] in TCR PM dynamics and activity in a mouse T-cell hybridoma upon ectopic expression of a PM-localized inositol polyphosphate-5-phosphatase (Inp54p). We observed that dephosphorylation of PI(4,5)P2 by the phosphatase increased the TCR/CD3 complex PM lateral mobility prior stimulation. The constitutive and antigen-elicited CD3 phosphorylation as well as the antigen-stimulated early signaling pathways were all found to be significantly augmented in cells expressing the phosphatase. Using state-of-the-art biophotonic approaches, we further showed that PI(4,5)P2 dephosphorylation strongly promoted the CD3ε cytoplasmic domain unbinding from the PM inner leaflet in living cells, thus resulting in an increased CD3 availability for interactions with Lck kinase. This could significantly account for the observed effects of PI(4,5)P2 dephosphorylation on the CD3 phosphorylation. Our data thus suggest that PIs play a key role in the regulation of the TCR/CD3 complex dynamics and activation at the PM.
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Affiliation(s)
| | - Kilian Ruminski
- Aix Marseille Univ, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Anne-Marie Sartre
- Aix Marseille Univ, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Marie-Claire Phelipot
- Aix Marseille Univ, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Audrey Salles
- Aix Marseille Univ, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France.,UTechS Photonic BioImaging (Imagopole) Citech, Institut Pasteur, Paris, 75724, France
| | - Elise Bergot
- Aix Marseille Univ, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Ambroise Wu
- Aix Marseille Univ, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Gaëtan Chicanne
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm U1048, Université Toulouse 3, Toulouse, France
| | - Mathieu Fallet
- Aix Marseille Univ, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Sophie Brustlein
- Aix Marseille Univ, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Cyrille Billaudeau
- Aix Marseille Univ, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France.,Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France
| | - Anthony Formisano
- Aix Marseille Univ, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Sébastien Mailfert
- Aix Marseille Univ, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Bernard Payrastre
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm U1048, Université Toulouse 3, Toulouse, France.,Laboratoire d'Hématologie, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Didier Marguet
- Aix Marseille Univ, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Sophie Brasselet
- Aix-Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel, UMR 7249, 13397, Marseille, France
| | - Yannick Hamon
- Aix Marseille Univ, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France.
| | - Hai-Tao He
- Aix Marseille Univ, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France.
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16
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Bilanges B, Alliouachene S, Pearce W, Morelli D, Szabadkai G, Chung YL, Chicanne G, Valet C, Hill JM, Voshol PJ, Collinson L, Peddie C, Ali K, Ghazaly E, Rajeeve V, Trichas G, Srinivas S, Chaussade C, Salamon RS, Backer JM, Scudamore CL, Whitehead MA, Keaney EP, Murphy LO, Semple RK, Payrastre B, Tooze SA, Vanhaesebroeck B. Vps34 PI 3-kinase inactivation enhances insulin sensitivity through reprogramming of mitochondrial metabolism. Nat Commun 2017; 8:1804. [PMID: 29180704 PMCID: PMC5703854 DOI: 10.1038/s41467-017-01969-4] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 10/30/2017] [Indexed: 12/13/2022] Open
Abstract
Vps34 PI3K is thought to be the main producer of phosphatidylinositol-3-monophosphate, a lipid that controls intracellular vesicular trafficking. The organismal impact of systemic inhibition of Vps34 kinase activity is not completely understood. Here we show that heterozygous Vps34 kinase-dead mice are healthy and display a robustly enhanced insulin sensitivity and glucose tolerance, phenotypes mimicked by a selective Vps34 inhibitor in wild-type mice. The underlying mechanism of insulin sensitization is multifactorial and not through the canonical insulin/Akt pathway. Vps34 inhibition alters cellular energy metabolism, activating the AMPK pathway in liver and muscle. In liver, Vps34 inactivation mildly dampens autophagy, limiting substrate availability for mitochondrial respiration and reducing gluconeogenesis. In muscle, Vps34 inactivation triggers a metabolic switch from oxidative phosphorylation towards glycolysis and enhanced glucose uptake. Our study identifies Vps34 as a new drug target for insulin resistance in Type-2 diabetes, in which the unmet therapeutic need remains substantial.
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Affiliation(s)
- Benoit Bilanges
- UCL Cancer Institute, University College London, 72 Huntley Street, London, WC1E 6DD, UK.
| | - Samira Alliouachene
- UCL Cancer Institute, University College London, 72 Huntley Street, London, WC1E 6DD, UK
| | - Wayne Pearce
- UCL Cancer Institute, University College London, 72 Huntley Street, London, WC1E 6DD, UK
| | - Daniele Morelli
- UCL Cancer Institute, University College London, 72 Huntley Street, London, WC1E 6DD, UK
| | - Gyorgy Szabadkai
- Department of Cell and Developmental Biology, Consortium for Mitochondrial Research, University College London, Gower Street, London, WC1E 6BT, UK
- Department of Biomedical Sciences, University of Padua, Padua, 58/B via Ugo, Bassi, 35121, Italy
| | - Yuen-Li Chung
- Cancer Research UK Cancer Imaging Centre, Division of Radiotherapy and Imaging, The Institute of Cancer Research London, 123 Old Brompton Road, London, SW7 3RP, UK
| | - Gaëtan Chicanne
- Inserm/UPS UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires, 1 Avenue Jean Poulhès BP 84225, 31432, Toulouse Cedex 4, France
| | - Colin Valet
- Inserm/UPS UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires, 1 Avenue Jean Poulhès BP 84225, 31432, Toulouse Cedex 4, France
| | - Julia M Hill
- Department of Cell and Developmental Biology, Consortium for Mitochondrial Research, University College London, Gower Street, London, WC1E 6BT, UK
| | - Peter J Voshol
- Metabolic Research Laboratories, MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, Level 4, Box 289, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
| | - Lucy Collinson
- The Francis Crick Institute, Lincoln's Inn Fields Laboratories, 44 Lincoln's Inn Fields, London, WC2A 3LY, UK
| | - Christopher Peddie
- The Francis Crick Institute, Lincoln's Inn Fields Laboratories, 44 Lincoln's Inn Fields, London, WC2A 3LY, UK
| | - Khaled Ali
- UCL Cancer Institute, University College London, 72 Huntley Street, London, WC1E 6DD, UK
| | - Essam Ghazaly
- Centre of Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, EC1M 6BQ, UK
| | - Vinothini Rajeeve
- Centre of Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, EC1M 6BQ, UK
| | - Georgios Trichas
- Department of Physiology Anatomy and Genetics, University of Oxford, Oxford, OX1 3PT, UK
| | - Shankar Srinivas
- Department of Physiology Anatomy and Genetics, University of Oxford, Oxford, OX1 3PT, UK
| | - Claire Chaussade
- UCL Cancer Institute, University College London, 72 Huntley Street, London, WC1E 6DD, UK
| | - Rachel S Salamon
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, 10461, NY, USA
| | - Jonathan M Backer
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, 10461, NY, USA
| | - Cheryl L Scudamore
- Mary Lyon Centre, MRC Harwell, Harwell Science and Innovation Campus, Harwell, OX11 0RD, UK
| | - Maria A Whitehead
- UCL Cancer Institute, University College London, 72 Huntley Street, London, WC1E 6DD, UK
| | - Erin P Keaney
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Leon O Murphy
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Robert K Semple
- Institute of Metabolic Science, University of Cambridge, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
| | - Bernard Payrastre
- Inserm/UPS UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires, 1 Avenue Jean Poulhès BP 84225, 31432, Toulouse Cedex 4, France
| | - Sharon A Tooze
- The Francis Crick Institute, Lincoln's Inn Fields Laboratories, 44 Lincoln's Inn Fields, London, WC2A 3LY, UK
| | - Bart Vanhaesebroeck
- UCL Cancer Institute, University College London, 72 Huntley Street, London, WC1E 6DD, UK.
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17
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Malbec O, Cassard L, Albanesi M, Jönsson F, Mancardi D, Chicanne G, Payrastre B, Dubreuil P, Vivier E, Daëron M. Trans-inhibition of activation and proliferation signals by Fc receptors in mast cells and basophils. Sci Signal 2016; 9:ra126. [PMID: 27999175 DOI: 10.1126/scisignal.aag1401] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Allergic and autoimmune inflammation are associated with the activation of mast cells and basophils by antibodies against allergens or auto-antigens, respectively. Both cell types express several receptors for the Fc portion of antibodies, the engagement of which by antigen-antibody complexes controls their responses. When aggregated on the plasma membrane, high-affinity immunoglobulin E (IgE) receptors (FcεRI) and low-affinity IgG receptors (FcγRIIIA in mice, FcγRIIA in humans) induce these cells to release and secrete proinflammatory mediators, chemokines, and cytokines that account for clinical symptoms. When coaggregated with activating receptors on the same cells, other low-affinity IgG receptors (FcγRIIB in both species) inhibit mast cell and basophil activation. We found that FcγRIIB inhibited not only signals triggered by activating receptors with which they were coengaged (cis-inhibition), but also signals triggered by receptors engaged independently (trans-inhibition). Trans-inhibition acted upon the FcεRI-dependent activation of mouse mast cells, mouse basophils, and human basophils, and upon growth factor receptor (Kit)-dependent normal mouse mast cell proliferation, as well as the constitutive in vitro proliferation and the in vivo growth of oncogene (v-Abl)-transformed mastocytoma cells. Trans-inhibition was induced by receptors, whether inhibitory (FcγRIIB) or activating (FcεRI), which recruited the lipid phosphatase SHIP1. By hydrolyzing PI(3,4,5)P3, SHIP1 induced a global unresponsiveness that affected biological responses triggered by receptors that use phosphoinositide 3-kinase to signal. These data suggest that trans-inhibition controls numerous physiological and pathological processes, and that it may be used as a therapeutic tool in inflammation, especially but not exclusively, in allergy and autoimmunity.
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Affiliation(s)
- Odile Malbec
- Institut Pasteur, Département d'Immunologie, Unité d'Allergologie Moléculaire et Cellulaire, Paris, France.,Inserm, Unité 760, Paris, France
| | - Lydie Cassard
- Institut Pasteur, Département d'Immunologie, Unité d'Allergologie Moléculaire et Cellulaire, Paris, France.,Inserm, Unité 760, Paris, France
| | - Marcello Albanesi
- Institut Pasteur, Département d'Immunologie, Unité d'Allergologie Moléculaire et Cellulaire, Paris, France.,Inserm, Unité 760, Paris, France
| | - Friederike Jönsson
- Institut Pasteur, Département d'Immunologie, Unité d'Allergologie Moléculaire et Cellulaire, Paris, France.,Inserm, Unité 760, Paris, France
| | - David Mancardi
- Institut Pasteur, Département d'Immunologie, Unité d'Allergologie Moléculaire et Cellulaire, Paris, France.,Inserm, Unité 760, Paris, France
| | - Gaëtan Chicanne
- Inserm, Unité 1048, Toulouse, France.,Université Toulouse 3, Toulouse, France.,Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Bernard Payrastre
- Inserm, Unité 1048, Toulouse, France.,Université Toulouse 3, Toulouse, France.,Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - Patrice Dubreuil
- Inserm, Unité 1068, Centre de Recherche en Cancérologie de Marseille, Marseille, France.,Institut Paoli-Calmettes, Marseille, France.,Aix Marseille Université, Marseille, France.,CNRS, UMR 7258, Marseille, France
| | - Eric Vivier
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université, Inserm, CNRS, Marseille, France.,Hôpital de la Conception, Marseille, France
| | - Marc Daëron
- Institut Pasteur, Département d'Immunologie, Unité d'Allergologie Moléculaire et Cellulaire, Paris, France. .,Inserm, Unité 760, Paris, France.,Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université, Inserm, CNRS, Marseille, France
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18
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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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19
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Antkowiak A, Viaud J, Severin S, Zanoun M, Ceccato L, Chicanne G, Strassel C, Eckly A, Leon C, Gachet C, Payrastre B, Gaits-Iacovoni F. Cdc42-dependent F-actin dynamics drive structuration of the demarcation membrane system in megakaryocytes. J Thromb Haemost 2016; 14:1268-84. [PMID: 26991240 DOI: 10.1111/jth.13318] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [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] [Received: 07/23/2015] [Accepted: 03/03/2016] [Indexed: 02/04/2023]
Abstract
UNLABELLED Essentials Information about the formation of the demarcation membrane system (DMS) is still lacking. We investigated the role of the cytoskeleton in DMS structuration in megakaryocytes. Cdc42/Pak-dependent F-actin remodeling regulates DMS organization for proper megakaryopoiesis. These data highlight the mandatory role of F-actin in platelet biogenesis. SUMMARY Background Blood platelet biogenesis results from the maturation of megakaryocytes (MKs), which involves the development of a complex demarcation membrane system (DMS). Therefore, MK differentiation is an attractive model for studying membrane remodeling. Objectives We sought to investigate the mechanism of DMS structuration in relationship to the cytoskeleton. Results Using three-dimensional (3D) confocal imaging, we have identified consecutive stages of DMS organization that rely on F-actin dynamics to polarize membranes and nuclei territories. Interestingly, microtubules are not involved in this process. We found that the mechanism underlying F-actin-dependent DMS formation required the activation of the guanosine triphosphate hydrolase Cdc42 and its p21-activated kinase effectors (Pak1/2/3). Förster resonance energy transfer demonstrated that active Cdc42 was associated with endomembrane dynamics throughout terminal maturation. Inhibition of Cdc42 or Pak1/2/3 severely destructured the DMS and blocked proplatelet formation. Even though this process does not require containment within the hematopoietic niche, because DMS structuration was observed upon thrombopoietin-treatment in suspension, integrin outside-in signaling was required for Pak activation and probably resulted from secretion of extracellular matrix by MKs. Conclusions These data indicate a functional link, mandatory for MK differentiation, between actin dynamics, regulated by Cdc42/Pak1/2/3, and DMS maturation.
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Affiliation(s)
- A Antkowiak
- INSERM, UMR1048, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - J Viaud
- INSERM, UMR1048, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - S Severin
- INSERM, UMR1048, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - M Zanoun
- INSERM, UMR1048, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - L Ceccato
- INSERM, UMR1048, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - G Chicanne
- INSERM, UMR1048, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
| | - C Strassel
- INSERM, UMR_S949, Université de Strasbourg, Etablissement Français du Sang-Alsace, Toulouse, France
| | - A Eckly
- INSERM, UMR_S949, Université de Strasbourg, Etablissement Français du Sang-Alsace, Toulouse, France
| | - C Leon
- INSERM, UMR_S949, Université de Strasbourg, Etablissement Français du Sang-Alsace, Toulouse, France
| | - C Gachet
- INSERM, UMR_S949, Université de Strasbourg, Etablissement Français du Sang-Alsace, Toulouse, France
| | - B Payrastre
- INSERM, UMR1048, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
- Laboratoire d'Hématologie, CHU de Toulouse, Toulouse, France
| | - F Gaits-Iacovoni
- INSERM, UMR1048, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France
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20
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Ceccato L, Chicanne G, Nahoum V, Pons V, Payrastre B, Gaits-Iacovoni F, Viaud J. PLIF: A rapid, accurate method to detect and quantitatively assess protein-lipid interactions. Sci Signal 2016; 9:rs2. [PMID: 27025878 DOI: 10.1126/scisignal.aad4337] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Phosphoinositides are a type of cellular phospholipid that regulate signaling in a wide range of cellular and physiological processes through the interaction between their phosphorylated inositol head group and specific domains in various cytosolic proteins. These lipids also influence the activity of transmembrane proteins. Aberrant phosphoinositide signaling is associated with numerous diseases, including cancer, obesity, and diabetes. Thus, identifying phosphoinositide-binding partners and the aspects that define their specificity can direct drug development. However, current methods are costly, time-consuming, or technically challenging and inaccessible to many laboratories. We developed a method called PLIF (for "protein-lipid interaction by fluorescence") that uses fluorescently labeled liposomes and tethered, tagged proteins or peptides to enable fast and reliable determination of protein domain specificity for given phosphoinositides in a membrane environment. We validated PLIF against previously known phosphoinositide-binding partners for various proteins and obtained relative affinity profiles. Moreover, PLIF analysis of the sorting nexin (SNX) family revealed not only that SNXs bound most strongly to phosphatidylinositol 3-phosphate (PtdIns3P or PI3P), which is known from analysis with other methods, but also that they interacted with other phosphoinositides, which had not previously been detected using other techniques. Different phosphoinositide partners, even those with relatively weak binding affinity, could account for the diverse functions of SNXs in vesicular trafficking and protein sorting. Because PLIF is sensitive, semiquantitative, and performed in a high-throughput manner, it may be used to screen for highly specific protein-lipid interaction inhibitors.
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Affiliation(s)
- Laurie Ceccato
- INSERM, U1048 and Université Toulouse 3, I2MC, Avenue Jean Poulhès BP84225, 31432 Toulouse Cedex 04, France
| | - Gaëtan Chicanne
- INSERM, U1048 and Université Toulouse 3, I2MC, Avenue Jean Poulhès BP84225, 31432 Toulouse Cedex 04, France
| | - Virginie Nahoum
- CNRS, Institut de Pharmacologie et de Biologie Structurale (IPBS), 31000 Toulouse, France. Université de Toulouse, UPS (Université Paul Sabatier), IPBS, 31000 Toulouse, France
| | - Véronique Pons
- INSERM, U1048 and Université Toulouse 3, I2MC, Avenue Jean Poulhès BP84225, 31432 Toulouse Cedex 04, France
| | - Bernard Payrastre
- INSERM, U1048 and Université Toulouse 3, I2MC, Avenue Jean Poulhès BP84225, 31432 Toulouse Cedex 04, France. CHU (Centre Hospitalier Universitaire) de Toulouse, Laboratoire d'Hématologie, 31059 Toulouse Cedex 03, France
| | - Frédérique Gaits-Iacovoni
- INSERM, U1048 and Université Toulouse 3, I2MC, Avenue Jean Poulhès BP84225, 31432 Toulouse Cedex 04, France
| | - Julien Viaud
- INSERM, U1048 and Université Toulouse 3, I2MC, Avenue Jean Poulhès BP84225, 31432 Toulouse Cedex 04, France.
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21
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Valet C, Severin S, Chicanne G, Laurent PA, Gaits-Iacovoni F, Gratacap MP, Payrastre B. The role of class I, II and III PI 3-kinases in platelet production and activation and their implication in thrombosis. Adv Biol Regul 2015; 61:33-41. [PMID: 26714793 DOI: 10.1016/j.jbior.2015.11.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 11/23/2015] [Accepted: 11/25/2015] [Indexed: 01/13/2023]
Abstract
Blood platelets play a pivotal role in haemostasis and are strongly involved in arterial thrombosis, a leading cause of death worldwide. Besides their critical role in pathophysiology, platelets represent a valuable model to investigate, both in vitro and in vivo, the biological roles of different branches of the phosphoinositide metabolism, which is highly active in platelets. While the phospholipase C (PLC) pathway has a crucial role in platelet activation, it is now well established that at least one class I phosphoinositide 3-kinase (PI3K) is also mandatory for proper platelet functions. Except class II PI3Kγ, all other isoforms of PI3Ks (class I α, β, γ, δ; class II α, β and class III) are expressed in platelets. Class I PI3Ks have been extensively studied in different models over the past few decades and several isoforms are promising drug targets to treat cancer and immune diseases. In platelet activation, it has been shown that while class I PI3Kδ plays a minor role, class I PI3Kβ has an important function particularly in thrombus growth and stability under high shear stress conditions found in stenotic arteries. This class I PI3K is a potentially interesting target for antithrombotic strategies. The role of class I PI3Kα remains ill defined in platelets. Herein, we will discuss our recent data showing the potential impact of inhibitors of this kinase on thrombus formation. The role of class II PI3Kα and β as well as class III PI3K (Vps34) in platelet production and function is just emerging. Based on our data and those very recently published in the literature, we will discuss the impact of these three PI3K isoforms in platelet production and functions and in thrombosis.
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Affiliation(s)
- Colin Valet
- Inserm U1048, I2MC and Université Paul Sabatier, 31432, Toulouse Cedex 04, France
| | - Sonia Severin
- Inserm U1048, I2MC and Université Paul Sabatier, 31432, Toulouse Cedex 04, France
| | - Gaëtan Chicanne
- Inserm U1048, I2MC and Université Paul Sabatier, 31432, Toulouse Cedex 04, France
| | | | | | | | - Bernard Payrastre
- Inserm U1048, I2MC and Université Paul Sabatier, 31432, Toulouse Cedex 04, France; CHU de Toulouse, Laboratoire d'Hématologie, 31059, Toulouse Cedex 03, France.
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22
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Alliouachene S, Bilanges B, Chicanne G, Anderson KE, Pearce W, Ali K, Valet C, Posor Y, Low PC, Chaussade C, Scudamore CL, Salamon RS, Backer JM, Stephens L, Hawkins PT, Payrastre B, Vanhaesebroeck B. Inactivation of the Class II PI3K-C2β Potentiates Insulin Signaling and Sensitivity. Cell Rep 2015; 13:1881-94. [PMID: 26655903 PMCID: PMC4675724 DOI: 10.1016/j.celrep.2015.10.052] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 08/25/2015] [Accepted: 10/15/2015] [Indexed: 11/24/2022] Open
Abstract
In contrast to the class I phosphoinositide 3-kinases (PI3Ks), the organismal roles of the kinase activity of the class II PI3Ks are less clear. Here, we report that class II PI3K-C2β kinase-dead mice are viable and healthy but display an unanticipated enhanced insulin sensitivity and glucose tolerance, as well as protection against high-fat-diet-induced liver steatosis. Despite having a broad tissue distribution, systemic PI3K-C2β inhibition selectively enhances insulin signaling only in metabolic tissues. In a primary hepatocyte model, basal PI3P lipid levels are reduced by 60% upon PI3K-C2β inhibition. This results in an expansion of the very early APPL1-positive endosomal compartment and altered insulin receptor trafficking, correlating with an amplification of insulin-induced, class I PI3K-dependent Akt signaling, without impacting MAPK activity. These data reveal PI3K-C2β as a critical regulator of endosomal trafficking, specifically in insulin signaling, and identify PI3K-C2β as a potential drug target for insulin sensitization.
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Affiliation(s)
- Samira Alliouachene
- UCL Cancer Institute, University College London, 72 Huntley Street, London WC1E 6DD, UK.
| | - Benoit Bilanges
- UCL Cancer Institute, University College London, 72 Huntley Street, London WC1E 6DD, UK
| | - Gaëtan Chicanne
- Inserm/UPS UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires, 1 Avenue Jean Poulhès BP 84225, 31432 Toulouse Cedex 4, France
| | - Karen E Anderson
- Inositide Laboratory, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Wayne Pearce
- UCL Cancer Institute, University College London, 72 Huntley Street, London WC1E 6DD, UK
| | - Khaled Ali
- UCL Cancer Institute, University College London, 72 Huntley Street, London WC1E 6DD, UK
| | - Colin Valet
- Inserm/UPS UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires, 1 Avenue Jean Poulhès BP 84225, 31432 Toulouse Cedex 4, France
| | - York Posor
- UCL Cancer Institute, University College London, 72 Huntley Street, London WC1E 6DD, UK
| | - Pei Ching Low
- UCL Cancer Institute, University College London, 72 Huntley Street, London WC1E 6DD, UK
| | - Claire Chaussade
- UCL Cancer Institute, University College London, 72 Huntley Street, London WC1E 6DD, UK
| | - Cheryl L Scudamore
- Mary Lyon Centre, MRC Harwell, Harwell Science and Innovation Campus, Harwell OX11 0RD, UK
| | - Rachel S Salamon
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Jonathan M Backer
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Len Stephens
- Inositide Laboratory, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Phill T Hawkins
- Inositide Laboratory, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Bernard Payrastre
- Inserm/UPS UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires, 1 Avenue Jean Poulhès BP 84225, 31432 Toulouse Cedex 4, France
| | - Bart Vanhaesebroeck
- UCL Cancer Institute, University College London, 72 Huntley Street, London WC1E 6DD, UK.
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23
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Viaud J, Mansour R, Antkowiak A, Mujalli A, Valet C, Chicanne G, Xuereb JM, Terrisse AD, Séverin S, Gratacap MP, Gaits-Iacovoni F, Payrastre B. Phosphoinositides: Important lipids in the coordination of cell dynamics. Biochimie 2015; 125:250-8. [PMID: 26391221 DOI: 10.1016/j.biochi.2015.09.005] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [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] [Received: 07/10/2015] [Accepted: 09/02/2015] [Indexed: 01/21/2023]
Abstract
By interacting specifically with proteins, phosphoinositides organize the spatiotemporal formation of protein complexes involved in the control of intracellular signaling, vesicular trafficking and cytoskeleton dynamics. A set of specific kinases and phosphatases ensures the production, degradation and inter-conversion of phosphoinositides to achieve a high level of precision in the regulation of cellular dynamics coordinated by these lipids. The direct involvement of these enzymes in cancer, genetic or infectious diseases, and the recent arrival of inhibitors targeting specific phosphoinositide kinases in clinic, emphasize the importance of these lipids and their metabolism in the biomedical field.
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Affiliation(s)
- Julien Viaud
- INSERM UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III Paul Sabatier, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 04, France.
| | - Rana Mansour
- INSERM UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III Paul Sabatier, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 04, France
| | - Adrien Antkowiak
- INSERM UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III Paul Sabatier, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 04, France
| | - Abdulrahman Mujalli
- INSERM UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III Paul Sabatier, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 04, France
| | - Colin Valet
- INSERM UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III Paul Sabatier, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 04, France
| | - Gaëtan Chicanne
- INSERM UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III Paul Sabatier, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 04, France
| | - Jean-Marie Xuereb
- INSERM UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III Paul Sabatier, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 04, France
| | - Anne-Dominique Terrisse
- INSERM UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III Paul Sabatier, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 04, France
| | - Sonia Séverin
- INSERM UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III Paul Sabatier, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 04, France
| | - Marie-Pierre Gratacap
- INSERM UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III Paul Sabatier, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 04, France
| | - Frédérique Gaits-Iacovoni
- INSERM UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III Paul Sabatier, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 04, France
| | - Bernard Payrastre
- INSERM UMR 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III Paul Sabatier, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 04, France; Centre Hospitalier Universitaire de Toulouse, Laboratoire d'Hématologie, 31059 Toulouse Cedex 03, France.
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Boal F, Mansour R, Gayral M, Saland E, Chicanne G, Xuereb JM, Marcellin M, Burlet-Schiltz O, Sansonetti PJ, Payrastre B, Tronchère H. TOM1 is a PI5P effector involved in the regulation of endosomal maturation. J Cell Sci 2015; 128:815-27. [DOI: 10.1242/jcs.166314] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Phosphoinositides represent a major class of lipids specifically involved in the organisation of signaling cascades, maintenance of the identity of organelles and regulation of multiple intracellular trafficking steps. We previously described that phosphatidylinositol 5-monophosphate (PI5P), produced by the Shigella flexneri phosphatase IpgD, is implicated in the endosomal sorting of the EGFR. Here, we show that the adaptor protein TOM1 is a new PI5P direct binding partner. We identify the domain of TOM1 involved in this interaction and characterize the binding motif. Finally, we demonstrate that the recruitment of TOM1 by PI5P on signaling endosomes is responsible for the delay in EGFR degradation and fluid-phase bulk endocytosis. Taken together, our data strongly suggest that PI5P-enrichment in signaling endosomes prevents endosomal maturation through the recruitment of TOM1, and point out to a new function of PI5P in regulating discrete maturation steps in the endosomal system.
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Fant X, Durieu E, Chicanne G, Payrastre B, Sbrissa D, Shisheva A, Limanton E, Carreaux F, Bazureau JP, Meijer L. cdc-like/dual-specificity tyrosine phosphorylation-regulated kinases inhibitor leucettine L41 induces mTOR-dependent autophagy: implication for Alzheimer's disease. Mol Pharmacol 2014; 85:441-50. [PMID: 24366666 PMCID: PMC6067634 DOI: 10.1124/mol.113.090837] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [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] [Received: 11/18/2013] [Accepted: 12/23/2013] [Indexed: 12/26/2022] Open
Abstract
Leucettines, a family of pharmacological inhibitors of dual-specificity tyrosine phosphorylation regulated kinases and cdc-like kinases (CLKs), are currently under investigation for their potential therapeutic application to Down syndrome and Alzheimer's disease. We here report that leucettine L41 triggers bona fide autophagy in osteosarcoma U-2 OS cells and immortalized mouse hippocampal HT22 cells, characterized by microtubule-associated protein light chain 3 membrane translocation and foci formation. Leucettine L41-triggered autophagy requires the Unc-51-like kinase and is sensitive to the phosphatidylinositol 3-kinase (PI3K) inhibitors wortmannin and 3-methyladenine, suggesting that it acts through the mammalian target of rapamycin (mTOR)/PI3K-dependent pathway. Leucettine L41 does not act by modifying the autophagic flux of vesicles. Leucettine L41-induced autophagy correlates best with inhibition of CLKs. Leucettine L41 modestly inhibited phosphatidylinositol-3-phosphate 5-kinase, FYVE domain-containing activity as tested both in vitro and in vivo, which may also contribute to autophagy induction. Altogether these results demonstrate that leucettines can activate the autophagic mTOR/PI3K pathway, a characteristic that may turn advantageous in the context of Alzheimer's disease treatment.
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Affiliation(s)
- Xavier Fant
- Centre National de la Recherche Scientifique (CNRS), USR3151, "Protein Phosphorylation and Human Disease," Station Biologique, Roscoff cedex, France (X.F., E.D.); Institut National de la Santé et de la Recherche Médicale/Université Paul Sabatier Unité Mixte de Recherche (UMR) 1048, "Production et fonctions plaquettaires: signalisation et phosphoinositides" group, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse cedex, France (G.C., B.P.); Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan (D.S., A.S.); Laboratoire Sciences Chimiques de Rennes, UMR CNRS 6226, Groupe Ingénierie Chimique et Molécules pour le Vivant (ICMV), Université de Rennes, Campus de Beaulieu, Rennes cedex, France (E.L., F.C., J.-P.B.); and ManRos Therapeutics, Perharidy Research Center, Roscoff, Bretagne, France (L.M.)
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26
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Despeaux M, Chicanne G, Rouer E, De Toni-Costes F, Bertrand J, Mansat-De Mas V, Vergnolle N, Eaves C, Payrastre B, Girault JA, Racaud-Sultan C. Focal adhesion kinase splice variants maintain primitive acute myeloid leukemia cells through altered Wnt signaling. Stem Cells 2013; 30:1597-610. [PMID: 22714993 DOI: 10.1002/stem.1157] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Focal adhesion kinase (FAK) activity contributes to many advanced cancer phenotypes, but little is known about its role in human acute myeloid leukemia (AML). Here, we show that FAK splice variants are abnormally expressed in the primitive leukemic cells of poor prognosis AML patients. In the CD34(+) 38(-) 123(+) long-term culture-initiating cell-enriched leukemic cells of these patients, FAK upregulates expression of Frizzled-4 and phosphorylates Pyk2 to enable the required association of Pyk2 with the Wnt5a/Frizzled-4/LRP5 endocytosis complex and downstream activation of β-catenin, thereby replacing the Wnt3a-controlled canonical pathway used by normal hematopoietic stem cells. Transduction of primitive normal human hematopoietic cells with FAK splice variants induces a marked increase in their clonogenic activity and signaling via the Wnt5a-controlled canonical pathway. Targeting FAK or β-catenin efficiently eradicates primitive leukemic cells in vitro suggesting that FAK could be a useful therapeutic target for improved treatment of poor prognosis AML cases.
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Affiliation(s)
- Mathieu Despeaux
- Inserm U1043, CNRS U5282, Centre de Physiopathologie de Toulouse Purpan, Toulouse, France
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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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de Saint-Jean M, Delfosse V, Douguet D, Chicanne G, Payrastre B, Bourguet W, Antonny B, Drin G. Osh4p exchanges sterols for phosphatidylinositol 4-phosphate between lipid bilayers. ACTA ACUST UNITED AC 2012; 195:965-78. [PMID: 22162133 PMCID: PMC3241724 DOI: 10.1083/jcb.201104062] [Citation(s) in RCA: 295] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The yeast Kes1p/Osh4p protein functions as a sterol/PI(4)P exchanger between lipid membranes, which suggests the possibility of creating a sterol gradient via phosphoinositide metabolism. Osh/Orp proteins transport sterols between organelles and are involved in phosphoinositide metabolism. The link between these two aspects remains elusive. Using novel assays, we address the influence of membrane composition on the ability of Osh4p/Kes1p to extract, deliver, or transport dehydroergosterol (DHE). Surprisingly, phosphatidylinositol 4-phosphate (PI(4)P) specifically inhibited DHE extraction because PI(4)P was itself efficiently extracted by Osh4p. We solve the structure of the Osh4p–PI(4)P complex and reveal how Osh4p selectively substitutes PI(4)P for sterol. Last, we show that Osh4p quickly exchanges DHE for PI(4)P and, thereby, can transport these two lipids between membranes along opposite routes. These results suggest a model in which Osh4p transports sterol from the ER to late compartments pinpointed by PI(4)P and, in turn, transports PI(4)P backward. Coupled to PI(4)P metabolism, this transport cycle would create sterol gradients. Because the residues that recognize PI(4)P are conserved in Osh4p homologues, other Osh/Orp are potential sterol/phosphoinositol phosphate exchangers.
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Affiliation(s)
- Maud de Saint-Jean
- Institut de Pharmacologie Moléculaire et Cellulaire, Université de Nice Sophia-Antipolis and Centre National de la Recherche Scientifique, 06560 Valbonne, France
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Ramel D, Lagarrigue F, Pons V, Mounier J, Dupuis-Coronas S, Chicanne G, Sansonetti PJ, Gaits-Iacovoni F, Tronchère H, Payrastre B. Shigella flexneri infection generates the lipid PI5P to alter endocytosis and prevent termination of EGFR signaling. Sci Signal 2012; 4:ra61. [PMID: 21934107 DOI: 10.1126/scisignal.2001619] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The phosphoinositide metabolic pathway, which regulates cellular processes implicated in survival, motility, and trafficking, is often subverted by bacterial pathogens. Shigella flexneri, a bacterium that causes dysentery, injects IpgD, a phosphoinositide phosphatase that generates the lipid phosphatidylinositol 5-phosphate (PI5P), into host cells, thereby activating the phosphoinositide 3-kinase-Akt survival pathway. We show that epidermal growth factor receptor (EGFR) is required for PI5P-dependent activation of Akt in infected HeLa cells or cells ectopically expressing IpgD. Cells treated with PI5P had increased numbers of early endosomes with activated EGFR, no detectable EGFR in the late endosomal or lysosomal compartments, and prolonged EGFR signaling. Endosomal recycling and retrograde pathways were spared, indicating that the effect of PI5P on the degradative route to the late endocytic compartments was specific. Thus, we identified PI5P, which was enriched in endosomes, as a regulator of vesicular trafficking that alters growth factor receptor signaling by impairing lysosomal degradation, a property used by S. flexneri to favor survival of host cells.
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Affiliation(s)
- Damien Ramel
- INSERM, U1048, Université Toulouse 3, I2MC and Hôpital de Toulouse, Avenue Jean Poulhès BP84225, 31432 Toulouse Cedex 04, France
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Roubinet C, Decelle B, Chicanne G, Dorn JF, Payrastre B, Payre F, Carreno S. Molecular networks linked by Moesin drive remodeling of the cell cortex during mitosis. ACTA ACUST UNITED AC 2011; 195:99-112. [PMID: 21969469 PMCID: PMC3187714 DOI: 10.1083/jcb.201106048] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
During mitosis, cortical Moesin activity is restricted to promote cell elongation and cytokinesis, but localized Moesin recruitment is necessary for polar bleb retraction and cortical relaxation. The cortical mechanisms that drive the series of mitotic cell shape transformations remain elusive. In this paper, we identify two novel networks that collectively control the dynamic reorganization of the mitotic cortex. We demonstrate that Moesin, an actin/membrane linker, integrates these two networks to synergize the cortical forces that drive mitotic cell shape transformations. We find that the Pp1-87B phosphatase restricts high Moesin activity to early mitosis and down-regulates Moesin at the polar cortex, after anaphase onset. Overactivation of Moesin at the polar cortex impairs cell elongation and thus cytokinesis, whereas a transient recruitment of Moesin is required to retract polar blebs that allow cortical relaxation and dissipation of intracellular pressure. This fine balance of Moesin activity is further adjusted by Skittles and Pten, two enzymes that locally produce phosphoinositol 4,5-bisphosphate and thereby, regulate Moesin cortical association. These complementary pathways provide a spatiotemporal framework to explain how the cell cortex is remodeled throughout cell division.
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Affiliation(s)
- Chantal Roubinet
- Cell Biology of Mitosis laboratory, Université de Montréal, Montréal, Québec H3C 3J7, Canada
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Vaccari I, Dina G, Tronchère H, Kaufman E, Chicanne G, Cerri F, Wrabetz L, Payrastre B, Quattrini A, Weisman LS, Meisler MH, Bolino A. Genetic interaction between MTMR2 and FIG4 phospholipid phosphatases involved in Charcot-Marie-Tooth neuropathies. PLoS Genet 2011; 7:e1002319. [PMID: 22028665 PMCID: PMC3197679 DOI: 10.1371/journal.pgen.1002319] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [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: 04/06/2011] [Accepted: 08/09/2011] [Indexed: 01/01/2023] Open
Abstract
We previously reported that autosomal recessive demyelinating Charcot-Marie-Tooth (CMT) type 4B1 neuropathy with myelin outfoldings is caused by loss of MTMR2 (Myotubularin-related 2) in humans, and we created a faithful mouse model of the disease. MTMR2 dephosphorylates both PtdIns3P and PtdIns(3,5)P(2), thereby regulating membrane trafficking. However, the function of MTMR2 and the role of the MTMR2 phospholipid phosphatase activity in vivo in the nerve still remain to be assessed. Mutations in FIG4 are associated with CMT4J neuropathy characterized by both axonal and myelin damage in peripheral nerve. Loss of Fig4 function in the plt (pale tremor) mouse produces spongiform degeneration of the brain and peripheral neuropathy. Since FIG4 has a role in generation of PtdIns(3,5)P(2) and MTMR2 catalyzes its dephosphorylation, these two phosphatases might be expected to have opposite effects in the control of PtdIns(3,5)P(2) homeostasis and their mutations might have compensatory effects in vivo. To explore the role of the MTMR2 phospholipid phosphatase activity in vivo, we generated and characterized the Mtmr2/Fig4 double null mutant mice. Here we provide strong evidence that Mtmr2 and Fig4 functionally interact in both Schwann cells and neurons, and we reveal for the first time a role of Mtmr2 in neurons in vivo. Our results also suggest that imbalance of PtdIns(3,5)P(2) is at the basis of altered longitudinal myelin growth and of myelin outfolding formation. Reduction of Fig4 by null heterozygosity and downregulation of PIKfyve both rescue Mtmr2-null myelin outfoldings in vivo and in vitro.
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Affiliation(s)
- Ilaria Vaccari
- Human Inherited Neuropathies Unit, INSPE-Institute for Experimental Neurology, Division of Neuroscience, San Raffaele Scientific Institute, Milan, Italy
- Dulbecco Telethon Institute, San Raffaele Scientific Institute, Milan, Italy
| | - Giorgia Dina
- Neuropathology Unit, INSPE–Institute for Experimental Neurology, Division of Neuroscience, San Raffaele Scientific Institute, Milan, Italy
| | - Hélène Tronchère
- INSERM U1048 and Université Toulouse 3, I2MC, CHU Toulouse, Toulouse, France
| | - Emily Kaufman
- Biology of Myelin Unit, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy
| | - Gaëtan Chicanne
- INSERM U1048 and Université Toulouse 3, I2MC, CHU Toulouse, Toulouse, France
| | - Federica Cerri
- Neuropathology Unit, INSPE–Institute for Experimental Neurology, Division of Neuroscience, San Raffaele Scientific Institute, Milan, Italy
| | - Lawrence Wrabetz
- Biology of Myelin Unit, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy
| | - Bernard Payrastre
- INSERM U1048 and Université Toulouse 3, I2MC, CHU Toulouse, Toulouse, France
| | - Angelo Quattrini
- Neuropathology Unit, INSPE–Institute for Experimental Neurology, Division of Neuroscience, San Raffaele Scientific Institute, Milan, Italy
| | - Lois S. Weisman
- Life Science Institute, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Miriam H. Meisler
- Department of Human Genetics, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Alessandra Bolino
- Human Inherited Neuropathies Unit, INSPE-Institute for Experimental Neurology, Division of Neuroscience, San Raffaele Scientific Institute, Milan, Italy
- Dulbecco Telethon Institute, San Raffaele Scientific Institute, Milan, Italy
- * E-mail:
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Dupuis-Coronas S, Lagarrigue F, Ramel D, Chicanne G, Saland E, Gaits-Iacovoni F, Payrastre B, Tronchère H. The nucleophosmin-anaplastic lymphoma kinase oncogene interacts, activates, and uses the kinase PIKfyve to increase invasiveness. J Biol Chem 2011; 286:32105-14. [PMID: 21737449 DOI: 10.1074/jbc.m111.227512] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
NPM-ALK is a chimeric tyrosine kinase detected in most anaplastic large cell lymphomas that results from the reciprocal translocation t(2,5)(p23;q35) that fuses the N-terminal domain of nucleophosmin (NPM) to the catalytic domain of the anaplastic lymphoma kinase (ALK) receptor. The constitutive activity of the kinase is responsible for its oncogenicity through the stimulation of several downstream signaling pathways, leading to cell proliferation, migration, and survival. We demonstrated previously that the high level of phosphatidylinositol 5-phosphate measured in NPM-ALK-expressing cells is controlled by the phosphoinositide kinase PIKfyve, a lipid kinase known for its role in vesicular trafficking. Here, we show that PIKfyve associates with NPM-ALK and that the interaction involves the 181-300 region of the oncogene. Moreover, we demonstrate that the tyrosine kinase activity of the oncogene controls PIKfyve lipid kinase activity but is dispensable for the formation of the complex. Silencing or inhibition of PIKfyve using siRNA or the PIKfyve inhibitor YM201636 have no effect on NPM-ALK-mediated proliferation and migration but strongly reduce invasive capacities of NPM-ALK-expressing cells and their capacity to degrade the extracellular matrix. Accordingly, immunofluorescence studies confirm a perturbation of matrix metalloproteinase 9 localization at the cell surface and defect in maturation. Altogether, these results suggest a role for PIKfyve in NPM-ALK-mediated invasion.
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Affiliation(s)
- Sophie Dupuis-Coronas
- INSERM, U1048, I2MC, Université Toulouse III Paul-Sabatier, Centre Hospitalier Universitaire de Toulouse, Toulouse Cedex 4, France
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Tawk L, Dubremetz JF, Montcourrier P, Chicanne G, Merezegue F, Richard V, Payrastre B, Meissner M, Vial HJ, Roy C, Wengelnik K, Lebrun M. Phosphatidylinositol 3-Monophosphate Is Involved in Toxoplasma Apicoplast Biogenesis. PLoS Pathog 2011; 7:e1001286. [PMID: 21379336 PMCID: PMC3040667 DOI: 10.1371/journal.ppat.1001286] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [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: 04/27/2010] [Accepted: 01/10/2011] [Indexed: 12/14/2022] Open
Abstract
Apicomplexan parasites cause devastating diseases including malaria and toxoplasmosis. They harbour a plastid-like, non-photosynthetic organelle of algal origin, the apicoplast, which fulfils critical functions for parasite survival. Because of its essential and original metabolic pathways, the apicoplast has become a target for the development of new anti-apicomplexan drugs. Here we show that the lipid phosphatidylinositol 3-monophosphate (PI3P) is involved in apicoplast biogenesis in Toxoplasma gondii. In yeast and mammalian cells, PI3P is concentrated on early endosomes and regulates trafficking of endosomal compartments. Imaging of PI3P in T. gondii showed that the lipid was associated with the apicoplast and apicoplast protein-shuttling vesicles. Interference with regular PI3P function by over-expression of a PI3P specific binding module in the parasite led to the accumulation of vesicles containing apicoplast peripheral membrane proteins around the apicoplast and, ultimately, to the loss of the organelle. Accordingly, inhibition of the PI3P-synthesising kinase interfered with apicoplast biogenesis. These findings point to an unexpected implication for this ubiquitous lipid and open new perspectives on how nuclear encoded proteins traffic to the apicoplast. This study also highlights the possibility of developing specific pharmacological inhibitors of the parasite PI3-kinase as novel anti-apicomplexan drugs. Phosphatidyinositol 3-monophosphate (PI3P) is important for endocytic fusion events in eukaryotic cells. Despite the importance of this lipid in cell biology, its localization and function in apicomplexan parasites has not yet been extensively explored. In this study, we attribute for the first time a role for PI3P in Toxoplasma and identify a function different from classical endosomal trafficking. We show that the perturbation of PI3P function in T. gondii induced a morphological alteration of vesicles containing proteins destined for the outermost apicoplast membrane, which accumulated abnormally around the organelle, resulting ultimately in the loss of apicoplasts. These findings suggest a new role for PI3P in a vesicular trafficking process necessary for apicoplast biogenesis and provide an attractive model in which PI3P allows the fusion of vesicles containing nuclear-encoded apicoplast proteins with the apicoplast. As the outermost membrane of the apicoplast is originally derived from the endocytic compartment during the ancestral secondary endosymbiosis event, a fascinating question arises about whether apicomplexan parasites have reshaped the classical PI3P-dependent endocytic machinery to target proteins to the apicoplast.
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Affiliation(s)
- Lina Tawk
- UMR 5235 CNRS, Université Montpellier 1 & 2, Montpellier, France
| | | | | | - Gaëtan Chicanne
- INSERM U563, Université Toulouse III Paul-Sabatier, CHU Toulouse, Hôpital Purpan, Toulouse, France
| | | | - Véronique Richard
- Service Commun de Microscopie Electronique, Université de Montpellier 1 & 2, Montpellier, France
| | - Bernard Payrastre
- INSERM U563, Université Toulouse III Paul-Sabatier, CHU Toulouse, Hôpital Purpan, Toulouse, France
| | - Markus Meissner
- Faculty of Biomedical & Life Sciences, Parasitology, Glasgow Biomedical Research Centre, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Henri J. Vial
- UMR 5235 CNRS, Université Montpellier 1 & 2, Montpellier, France
| | - Christian Roy
- UMR 5235 CNRS, Université Montpellier 1 & 2, Montpellier, France
| | - Kai Wengelnik
- UMR 5235 CNRS, Université Montpellier 1 & 2, Montpellier, France
- * E-mail: (ML); (KW)
| | - Maryse Lebrun
- UMR 5235 CNRS, Université Montpellier 1 & 2, Montpellier, France
- * E-mail: (ML); (KW)
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Gratacap MP, Guillermet-Guibert J, Martin V, Chicanne G, Tronchère H, Gaits-Iacovoni F, Payrastre B. Regulation and roles of PI3Kβ, a major actor in platelet signaling and functions. ACTA ACUST UNITED AC 2010; 51:106-16. [PMID: 21035500 DOI: 10.1016/j.advenzreg.2010.09.011] [Citation(s) in RCA: 56] [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: 09/03/2010] [Accepted: 09/06/2010] [Indexed: 01/12/2023]
Abstract
Phosphoinositide 3-kinases (PI3Ks) are important signaling enzymes involved in the regulation of a number of critical cell functions. Significant progress has been made during the last few years in defining the implication of individual PI3K isoforms. The role of the class IA PI3Kβ in different cell types has only been recently uncovered by the use of isoform-selective inhibitors and the development of mouse models harboring p110β catalytic subunit knock-out or germline knock-in of a kinase-dead allele of p110β. Although it is classically admitted that class IA PI3Ks are activated by receptor tyrosine kinases through recruitment of the regulatory subunits to specific tyrosine phosphorylated motifs via their SH2 domains, PI3Kβ is activated downstream of G protein-coupled receptors, and by co-operation between heterotrimeric G proteins and tyrosine kinases. PI3Kβ has been extensively studied in platelets where it appears to play an important role downstream of ITAM signaling, G protein-coupled receptors and aIIbβ3 integrin. Accordingly, mouse exhibiting p110β inactivation selectively in megakaryocyte/platelets are resistant to thromboembolism induced by carotid injury. The present review summarizes recent data concerning the mechanisms of PI3Kβ regulation and the roles of this PI3K isoform in blood platelet functions and other cell types.
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Affiliation(s)
- Marie-Pierre Gratacap
- Inserm, U563, Université Toulouse III, Centre de Physiopathologie de Toulouse Purpan, CHU-Purpan, Toulouse, France
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Geny B, Grassart A, Manich M, Chicanne G, Payrastre B, Sauvonnet N, Popoff MR. Rac1 inactivation by lethal toxin from Clostridium sordellii modifies focal adhesions upstream of actin depolymerization. Cell Microbiol 2009; 12:217-32. [PMID: 19840028 DOI: 10.1111/j.1462-5822.2009.01392.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Inactivation of different small GTPases upon their glucosylation by lethal toxin from Clostridium sordellii strain IP82 (LT-82) is already known to lead to cell rounding, adherens junction (AJ) disorganization and actin depolymerization. In the present work, we observed that LT-82 induces a rapid dephosphorylation of paxillin, a protein regulating focal adhesion (FA), independently of inactivation of paxillin kinases such as Src, Fak and Pyk2. Among the small GTPases inactivated by this toxin, including Rac, Ras, Rap and Ral, we identified Rac1, as responsible for paxillin dephosphorylation using cells overexpressing Rac1(V12). Rac1 inactivation by LT-82 modifies interactions between proteins from AJ and FA complexes as shown by pull-down assays. We showed that in Triton X-100-insoluble membrane proteins from these complexes, namely E-cadherin, beta-catenin, p120-catenin and talin, are decreased upon LT-82 intoxication, a treatment that also induces a rapid decrease in cell phosphoinositide content. Therefore, we proposed that Rac inactivation by LT-82 alters phosphoinositide metabolism leading to FA and AJ complex disorganization and actin depolymerization.
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Affiliation(s)
- Blandine Geny
- Unité des Bactéries Anaérobies et Toxines, Department of Microbiology, Institut Pasteur, 25 rue du Docteur Roux, Paris Cedex 15, France.
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Ramel D, Lagarrigue F, Dupuis-Coronas S, Chicanne G, Leslie N, Gaits-Iacovoni F, Payrastre B, Tronchère H. PtdIns5P protects Akt from dephosphorylation through PP2A inhibition. Biochem Biophys Res Commun 2009; 387:127-31. [PMID: 19576174 DOI: 10.1016/j.bbrc.2009.06.139] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Accepted: 06/26/2009] [Indexed: 01/26/2023]
Abstract
Phosphatidylinositol 5-phosphate (PtdIns5P), the most recently discovered phosphoinositide, has been proposed to play a role as a lipid mediator of intracellular signaling. We have previously shown that PtdIns5P generated by IpgD, an effector of the causative agent of dysentery Shigella flexneri, activates the PI 3-kinase/Akt pathway. Here, we demonstrate that PtdIns5P is able to protect Akt from dephosphorylation. This effect is not due to inhibition of the phosphoinositide phosphatase regulating PtdIns(3,4,5)P(3) levels PTEN but rather to PtdIns5P-induced phosphorylation and subsequent inhibition of the catalytic subunit of PP2A phosphatases. These data shed light on a new mechanism used by S. flexneri bacteria to sustain Akt activation to increase survival of the host cells during bacterial replication.
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Coronas S, Lagarrigue F, Ramel D, Chicanne G, Delsol G, Payrastre B, Tronchère H. Elevated levels of PtdIns5P in NPM-ALK transformed cells: implication of PIKfyve. Biochem Biophys Res Commun 2008; 372:351-5. [PMID: 18501703 DOI: 10.1016/j.bbrc.2008.05.062] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2008] [Accepted: 05/09/2008] [Indexed: 10/22/2022]
Abstract
Phosphatidylinositol 5-monophosphate (PtdIns5P), one of the latest phosphoinositides discovered, has been suggested to play important cellular functions. Here, we report the presence of higher levels of this lipid in cells expressing the oncogenic tyrosine kinase nucleophosmin anaplastic lymphoma kinase (NPM-ALK), a chimeric protein found in the large majority of anaplastic large cell lymphomas (ALCLs). In addition, we describe that a pool of PtdIns5P is located in the membrane extensions characteristic of NPM-ALK-transformed cells. Finally, we show that the increase of PtdIns5P is controlled by the kinase PIKfyve, which is known for its role in vesicular trafficking. These data suggest for the first time a role of PtdIns5P and PIKfyve in oncogenesis, potentially linking intracellular trafficking to cancer.
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Affiliation(s)
- S Coronas
- INSERM, U563, Département Oncogénèse, Signalisation et Innovation Thérapeutique, Toulouse, F-31300, France
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Gratacap MP, Séverin S, Chicanne G, Plantavid M, Payrastre B. Different roles of SHIP1 according to the cell context: The example of blood platelets. ACTA ACUST UNITED AC 2008; 48:240-52. [DOI: 10.1016/j.advenzreg.2007.11.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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De Toni F, Racaud-Sultan C, Chicanne G, Mas VMD, Cariven C, Mesange F, Salles JP, Demur C, Allouche M, Payrastre B, Manenti S, Ysebaert L. A crosstalk between the Wnt and the adhesion-dependent signaling pathways governs the chemosensitivity of acute myeloid leukemia. Oncogene 2006; 25:3113-22. [PMID: 16407823 DOI: 10.1038/sj.onc.1209346] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Relapses following chemotherapy are a major hindrance to patients' survival in acute myeloid leukemia (AML). To investigate the role of the hematopoietic niche in the chemoresistance of leukemic cells, we examined two pathways: one mediated by adhesion molecules/integrins, and the other by soluble factors of the morphogen Wnt pathway. In our study, both the adhesion of leukemic blasts to fibronectin and the addition of Wnt antagonists induced, independently, resistance of AML cells to daunorubicin in a cell survival assay. Using pharmacological inhibitors and siRNA, we showed that both resistance pathways required the activity of the glycogen synthase kinase 3beta (GSK3beta). Moreover, the AML cell protection downstream of GSK3beta was mediated by NF-kappaB. A link between the adhesion and the Wnt pathway was found, as adhesion of U937 on human osteoblasts, a component of the hematopoietic niche, triggered the secretion of the Wnt antagonist sFRP-1 and supported resistance to daunorubicin. The osteoblast-conditioned medium could also confer chemoresistance to U937 cells cultured in suspension, and this cell protective effect was abrogated after depletion of sFRP-1. In the context of this potential double in vivo resistance, modulators of the common signal GSK3beta and of its target NF-kappaB could represent important novel therapeutic tools.
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MESH Headings
- Antibiotics, Antineoplastic/pharmacology
- Blast Crisis
- Cell Adhesion/drug effects
- Cell Survival/drug effects
- Cells, Cultured
- Culture Media, Conditioned/pharmacology
- Daunorubicin/pharmacology
- Drug Resistance, Neoplasm
- Fibronectins/metabolism
- Glycogen Synthase Kinase 3/metabolism
- Glycogen Synthase Kinase 3 beta
- Humans
- Intercellular Signaling Peptides and Proteins/metabolism
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/metabolism
- Leukemia, Myeloid, Acute/pathology
- Membrane Proteins/metabolism
- NF-kappa B/genetics
- NF-kappa B/metabolism
- Osteoblasts/cytology
- Osteoblasts/metabolism
- RNA, Small Interfering/pharmacology
- Signal Transduction
- U937 Cells/metabolism
- Wnt Proteins/metabolism
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Affiliation(s)
- F De Toni
- Département d'Oncogenèse et Signalisation Cellulaire dans les Cellules Hématopoïétiques, Institut National de la Santé et de la Recherche Médicale Unité 563, Centre Hospitalier Universitaire Purpan, Toulouse, France
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Ysebaert L, Chicanne G, Demur C, De Toni F, Prade-Houdellier N, Ruidavets JB, Mansat-De Mas V, Rigal-Huguet F, Laurent G, Payrastre B, Manenti S, Racaud-Sultan C. Expression of beta-catenin by acute myeloid leukemia cells predicts enhanced clonogenic capacities and poor prognosis. Leukemia 2006; 20:1211-6. [PMID: 16688229 DOI: 10.1038/sj.leu.2404239] [Citation(s) in RCA: 142] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Activation of the Wnt/beta-catenin pathway has recently been shown to be crucial to the establishment of leukemic stem cells in chronic myeloid leukemia. We sought to determine whether beta-catenin was correlated to clonogenic capacity also in the acute myeloid leukemia (AML) setting. Eighty-two patients were retrospectively evaluated for beta-catenin expression by Western blot. beta-Catenin was expressed (although at various protein levels) in 61% of patients, and was undetectable in the remaining cases. In our cohort, beta-catenin expression was correlated with the clonogenic proliferation of AML-colony forming cells (AML-CFC or CFU-L) in methylcellulose in the presence of 5637-conditioned medium, and more strikingly with self-renewing of leukemic cells, as assessed in vitro by a re-plating assay. In survival analyses, beta-catenin appeared as a new independent prognostic factor predicting poor event-free survival and shortened overall survival (both with P<0.05). Furthermore, variations in beta-catenin protein levels were dependent on post-transcriptional mechanisms involving the Wnt/beta-catenin pathway only in leukemic cells. Indeed, beta-catenin negative leukemic cells were found to increase beta-catenin in response to Wnt3a agonist in contrast to normal counterparts. Altogether, our data pave the way to the evaluation of Wnt pathway inhibition as a new rationale for eradicating the clonogenic pool of AML cells.
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MESH Headings
- Cell Line, Tumor
- Clone Cells
- Female
- Gene Expression Regulation, Leukemic
- Humans
- Leukemia, Monocytic, Acute/metabolism
- Leukemia, Monocytic, Acute/mortality
- Leukemia, Monocytic, Acute/pathology
- Leukemia, Myeloid, Acute/metabolism
- Leukemia, Myeloid, Acute/mortality
- Leukemia, Myeloid, Acute/pathology
- Leukemia, Myelomonocytic, Acute/metabolism
- Leukemia, Myelomonocytic, Acute/mortality
- Leukemia, Myelomonocytic, Acute/pathology
- Male
- Middle Aged
- Neoplastic Stem Cells/pathology
- Neoplastic Stem Cells/physiology
- Predictive Value of Tests
- Prognosis
- Retrospective Studies
- Signal Transduction
- Survival Analysis
- Wnt Proteins/metabolism
- beta Catenin/genetics
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Affiliation(s)
- L Ysebaert
- NSERM U563, Centre de Physiopathologie Toulouse Purpan (CPTP), Département Oncogenèse et Signalisation dans les cellules Hématopoïétiques, CHU Purpan, Toulouse Cedex, France.
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Récher C, Beyne-Rauzy O, Demur C, Chicanne G, Dos Santos C, Mas VMD, Benzaquen D, Laurent G, Huguet F, Payrastre B. Antileukemic activity of rapamycin in acute myeloid leukemia. Blood 2004; 105:2527-34. [PMID: 15550488 DOI: 10.1182/blood-2004-06-2494] [Citation(s) in RCA: 237] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The mammalian target of rapamycin (mTOR) is a key regulator of growth and survival in many cell types. Its constitutive activation has been involved in the pathogenesis of various cancers. In this study, we show that mTOR inhibition by rapamycin strongly inhibits the growth of the most immature acute myeloid leukemia (AML) cell lines through blockade in G0/G1 phase of the cell cycle. Accordingly, 2 downstream effectors of mTOR, 4E-BP1 and p70S6K, are phosphorylated in a rapamycin-sensitive manner in a series of 23 AML cases. Interestingly, the mTOR inhibitor markedly impairs the clonogenic properties of fresh AML cells while sparing normal hematopoietic progenitors. Moreover, rapamycin induces significant clinical responses in 4 of 9 patients with either refractory/relapsed de novo AML or secondary AML. Overall, our data strongly suggest that mTOR is aberrantly regulated in most AML cells and that rapamycin and analogs, by targeting the clonogenic compartment of the leukemic clone, may be used as new compounds in AML therapy.
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MESH Headings
- Adaptor Proteins, Signal Transducing/metabolism
- Adolescent
- Adult
- Aged
- Antibiotics, Antineoplastic/pharmacology
- Cell Cycle Proteins
- Female
- G1 Phase/drug effects
- Hematopoietic Stem Cells/metabolism
- Humans
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/metabolism
- Male
- Middle Aged
- Phosphoproteins/metabolism
- Phosphorylation/drug effects
- Protein Kinases/metabolism
- Protein Processing, Post-Translational/drug effects
- Recurrence
- Resting Phase, Cell Cycle/drug effects
- Ribosomal Protein S6 Kinases, 70-kDa/metabolism
- Sirolimus/pharmacology
- TOR Serine-Threonine Kinases
- Tumor Cells, Cultured
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Affiliation(s)
- Christian Récher
- Institut National de la Santé et de la Recherche Médicale (Inserm) U563, CPTP, Département d'Oncogenèse et signalisation dans les cellules hématopoïétiques, IFR30, Toulouse, France.
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