1
|
de Oliveira Alves N, Dalmasso G, Nikitina D, Vaysse A, Ruez R, Ledoux L, Pedron T, Bergsten E, Boulard O, Autier L, Allam S, Motreff L, Sauvanet P, Letourneur D, Kashyap P, Gagnière J, Pezet D, Godfraind C, Salzet M, Lemichez E, Bonnet M, Najjar I, Malabat C, Monot M, Mestivier D, Barnich N, Yadav P, Fournier I, Kennedy S, Mettouchi A, Bonnet R, Sobhani I, Chamaillard M. The colibactin-producing Escherichia coli alters the tumor microenvironment to immunosuppressive lipid overload facilitating colorectal cancer progression and chemoresistance. Gut Microbes 2024; 16:2320291. [PMID: 38417029 PMCID: PMC10903627 DOI: 10.1080/19490976.2024.2320291] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 02/14/2024] [Indexed: 03/01/2024] Open
Abstract
Intratumoral bacteria flexibly contribute to cellular and molecular tumor heterogeneity for supporting cancer recurrence through poorly understood mechanisms. Using spatial metabolomic profiling technologies and 16SrRNA sequencing, we herein report that right-sided colorectal tumors are predominantly populated with Colibactin-producing Escherichia coli (CoPEC) that are locally establishing a high-glycerophospholipid microenvironment with lowered immunogenicity. It coincided with a reduced infiltration of CD8+ T lymphocytes that produce the cytotoxic cytokines IFN-γ where invading bacteria have been geolocated. Mechanistically, the accumulation of lipid droplets in infected cancer cells relied on the production of colibactin as a measure to limit genotoxic stress to some extent. Such heightened phosphatidylcholine remodeling by the enzyme of the Land's cycle supplied CoPEC-infected cancer cells with sufficient energy for sustaining cell survival in response to chemotherapies. This accords with the lowered overall survival of colorectal patients at stage III-IV who were colonized by CoPEC when compared to patients at stage I-II. Accordingly, the sensitivity of CoPEC-infected cancer cells to chemotherapies was restored upon treatment with an acyl-CoA synthetase inhibitor. By contrast, such metabolic dysregulation leading to chemoresistance was not observed in human colon cancer cells that were infected with the mutant strain that did not produce colibactin (11G5∆ClbQ). This work revealed that CoPEC locally supports an energy trade-off lipid overload within tumors for lowering tumor immunogenicity. This may pave the way for improving chemoresistance and subsequently outcome of CRC patients who are colonized by CoPEC.
Collapse
Affiliation(s)
| | - Guillaume Dalmasso
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Darja Nikitina
- CNRS, Institute Pasteur, Paris, France
- Laboratory of Clinical and Molecular Gastroenterology, Institute for Digestive Research, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Amaury Vaysse
- Institut Pasteur, Université Paris Cité, Bioinformatics and Biostatistics Hub, Plate-Forme Technologique Biomics, Paris, France
| | - Richard Ruez
- ONCOLille, INSERM, Phycell, University of Lille, Lille, France
| | - Lea Ledoux
- Réponse Inflammatoire et Spectrométrie de Masse-PRISM, University of Lille, Lille, France
| | | | - Emma Bergsten
- Institut Pasteur, Université Paris Cité, Paris, France
| | - Olivier Boulard
- ONCOLille, INSERM, Phycell, University of Lille, Lille, France
| | - Lora Autier
- ONCOLille, INSERM, Phycell, University of Lille, Lille, France
| | - Sofian Allam
- ONCOLille, INSERM, Phycell, University of Lille, Lille, France
| | - Laurence Motreff
- Institut Pasteur, Université Paris Cité, Bioinformatics and Biostatistics Hub, Plate-Forme Technologique Biomics, Paris, France
| | - Pierre Sauvanet
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | | | - Pragya Kashyap
- Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, Rajasthan, India
| | - Johan Gagnière
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Denis Pezet
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Catherine Godfraind
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Michel Salzet
- Réponse Inflammatoire et Spectrométrie de Masse-PRISM, University of Lille, Lille, France
| | | | - Mathilde Bonnet
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Imène Najjar
- Institut Pasteur, Université Paris Cité, Bioinformatics and Biostatistics Hub, Plate-Forme Technologique Biomics, Paris, France
| | - Christophe Malabat
- Institut Pasteur, Université Paris Cité, Bioinformatics and Biostatistics Hub, Plate-Forme Technologique Biomics, Paris, France
| | - Marc Monot
- Institut Pasteur, Université Paris Cité, Bioinformatics and Biostatistics Hub, Plate-Forme Technologique Biomics, Paris, France
| | | | - Nicolas Barnich
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Pankaj Yadav
- Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, Rajasthan, India
| | - Isabelle Fournier
- Réponse Inflammatoire et Spectrométrie de Masse-PRISM, University of Lille, Lille, France
| | | | | | - Richard Bonnet
- Microbes, Intestin, Inflammation et Susceptibilité de l’Hôte (M2iSH), Centre de Recherche en Nutrition Humaine Auvergne, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Iradj Sobhani
- Université Paris Est Créteil, Créteil, France
- Service de Gastroentérologie CHU Henri Mondor, Assistance Publique des Hôpitaux de Paris-APHP, Créteil, France
| | | |
Collapse
|
2
|
Bergsten E, Mestivier D, Donnadieu F, Pedron T, Barau C, Meda LT, Mettouchi A, Lemichez E, Gorgette O, Chamaillard M, Vaysse A, Volant S, Doukani A, Sansonetti PJ, Sobhani I, Nigro G. Parvimonas micra, an oral pathobiont associated with colorectal cancer, epigenetically reprograms human colonocytes. Gut Microbes 2023; 15:2265138. [PMID: 37842920 PMCID: PMC10580862 DOI: 10.1080/19490976.2023.2265138] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 09/20/2023] [Indexed: 10/17/2023] Open
Abstract
Recently, an intestinal dysbiotic microbiota with enrichment in oral cavity bacteria has been described in colorectal cancer (CRC) patients. Here, we characterize and investigate one of these oral pathobionts, the Gram-positive anaerobic coccus Parvimonas micra. We identified two phylotypes (A and B) exhibiting different phenotypes and adhesion capabilities. We observed a strong association of phylotype A with CRC, with its higher abundance in feces and in tumoral tissue compared with the normal homologous colonic mucosa, which was associated with a distinct methylation status of patients. By developing an in vitro hypoxic co-culture system of human primary colonic cells with anaerobic bacteria, we show that P. micra phylotype A alters the DNA methylation profile promoters of key tumor-suppressor genes, oncogenes, and genes involved in epithelial-mesenchymal transition. In colonic mucosa of CRC patients carrying P. micra phylotype A, we found similar DNA methylation alterations, together with significant enrichment of differentially expressed genes in pathways involved in inflammation, cell adhesion, and regulation of actin cytoskeleton, providing evidence of P. micra's possible role in the carcinogenic process.
Collapse
Affiliation(s)
- Emma Bergsten
- Unité de Pathogénie Microbienne Moléculaire, INSERM U1202, Institut Pasteur, Paris, France
- Équipe universitaire EC2M3-EA7375, Université Paris- Est (UPEC), Créteil, France
| | - Denis Mestivier
- Équipe universitaire EC2M3-EA7375, Université Paris- Est (UPEC), Créteil, France
- Plateforme de Bio-informatique, Institut Mondor de Recherche Biomédicale (IMRB/INSERM U955), Université Paris-Est, Créteil, France
| | - Francoise Donnadieu
- Unité de Pathogénie Microbienne Moléculaire, INSERM U1202, Institut Pasteur, Paris, France
| | - Thierry Pedron
- Unité de Pathogénie Microbienne Moléculaire, INSERM U1202, Institut Pasteur, Paris, France
- Unité Bactériophage, Bactérie, Hôte, Institut Pasteur, Paris, France
| | - Caroline Barau
- Plateforme de Ressources Biologiques, CHU Henri Mondor Assistance Publique Hôpitaux de Paris (APHP), Créteil, France
| | - Landry Tsoumtsa Meda
- Unité des Toxines Bactériennes, Université Paris Cité, CNRS UMR6047, INSERM U1306, Institut Pasteur, Paris, France
| | - Amel Mettouchi
- Unité des Toxines Bactériennes, Université Paris Cité, CNRS UMR6047, INSERM U1306, Institut Pasteur, Paris, France
| | - Emmanuel Lemichez
- Unité des Toxines Bactériennes, Université Paris Cité, CNRS UMR6047, INSERM U1306, Institut Pasteur, Paris, France
| | - Olivier Gorgette
- Plateforme de Bio-Imagerie Ultrastructurale, Institut Pasteur, Université Paris Cité, Paris, France
| | - Mathias Chamaillard
- Laboratory of Cell Physiology, INSERM U1003, University of Lille, Lille, France
| | - Amaury Vaysse
- Bioinformatics and Biostatistics Hub, Institut Pasteur, Université Paris Cité, Paris, France
| | - Stevenn Volant
- Bioinformatics and Biostatistics Hub, Institut Pasteur, Université Paris Cité, Paris, France
| | - Abiba Doukani
- Sorbonne Université, Inserm, Unité Mixte de Service Production et Analyse de données en Sciences de la Vie et en Santé, Paris, France
| | - Philippe J. Sansonetti
- Unité de Pathogénie Microbienne Moléculaire, INSERM U1202, Institut Pasteur, Paris, France
- Chaire de Microbiologie et Maladies Infectieuses, Collège de France, Paris, France
| | - Iradj Sobhani
- Équipe universitaire EC2M3-EA7375, Université Paris- Est (UPEC), Créteil, France
- Service de Gastroentérologie, CHU Henri Mondor Assistance Publique Hôpitaux de Paris (APHP), Créteil, France
| | - Giulia Nigro
- Unité de Pathogénie Microbienne Moléculaire, INSERM U1202, Institut Pasteur, Paris, France
- Microenvironment and Immunity Unit, INSERM U1224, Institut Pasteur, Paris, France
| |
Collapse
|
3
|
Chat H, Dalmasso G, Godfraind C, Bonnin V, Beyrouthy R, Bonnet M, Barnich N, Mettouchi A, Lemichez E, Bonnet R, Delmas J. Cytotoxic necrotizing factor 1 hinders colon tumorigenesis induced by colibactin-producing Escherichia coli in ApcMin/+ mice. Gut Microbes 2023; 15:2229569. [PMID: 37417545 DOI: 10.1080/19490976.2023.2229569] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/08/2023] Open
Abstract
Colorectal cancer (CRC) patients are frequently colonized by colibactin-producing Escherichia coli (CoPEC) (>40%), which enhances tumorigenesis in mouse models of CRC. We observed that 50% of CoPEC also contains the cnf1 gene, which encodes cytotoxic necrotizing factor-1 (CNF1), an enhancer of the eukaryotic cell cycle. The impact of its co-occurrence with colibactin (Clb) has not yet been investigated. We evaluated the impact of CNF1 on colorectal tumorigenesis using human colonic epithelial HT-29 cells and CRC-susceptible ApcMin/+ mice inoculated with the CoPEC 21F8 clinical strain (Clb+Cnf+) or 21F8 isogenic mutants (Clb+Cnf-, Clb-Cnf+ and Clb-Cnf-). Infection with the Clb+Cnf- strain induced higher levels of inflammatory cytokines and senescence markers both in vitro and in vivo compared to those induced by infection with the Clb+Cnf+ strain. In contrast, the Clb+Cnf- and Clb+Cnf+ strains generated similar levels of DNA damage in HT-29 cells and in colonic murine tissues. Furthermore, the ApcMin/+ mice inoculated with the Clb+Cnf- strain developed significantly more tumors than the mice inoculated with the Clb+Cnf+ strain or the isogenic mutants, and the composition of their microbiota was changed. Finally, rectal administration of the CNF1 protein in ApcMin/+ mice inoculated with the Clb+Cnf- strain significantly decreased tumorigenesis and inflammation. Overall, this study provides evidence that CNF1 decreases the carcinogenic effects of CoPEC in ApcMin/+ mice by decreasing CoPEC-induced cellular senescence and inflammation.
Collapse
Affiliation(s)
- Héloïse Chat
- Centre de Recherche en Nutrition Humaine Auvergne, University Clermont Auvergne, Inserm U1071, INRAE USC 1382, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, France
| | - Guillaume Dalmasso
- Centre de Recherche en Nutrition Humaine Auvergne, University Clermont Auvergne, Inserm U1071, INRAE USC 1382, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, France
| | - Catherine Godfraind
- Centre de Recherche en Nutrition Humaine Auvergne, University Clermont Auvergne, Inserm U1071, INRAE USC 1382, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, France
- Neuropathology Unit, University Hospital of Clermont-Ferrand, Clermont-Ferrand, France
| | - Virginie Bonnin
- Centre de Recherche en Nutrition Humaine Auvergne, University Clermont Auvergne, Inserm U1071, INRAE USC 1382, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, France
| | - Racha Beyrouthy
- Centre de Recherche en Nutrition Humaine Auvergne, University Clermont Auvergne, Inserm U1071, INRAE USC 1382, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, France
| | - Mathilde Bonnet
- Centre de Recherche en Nutrition Humaine Auvergne, University Clermont Auvergne, Inserm U1071, INRAE USC 1382, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, France
- Institut Universitaire de Technologie, University Clermont Auvergne, Clermont-Ferrand, France
| | - Nicolas Barnich
- Centre de Recherche en Nutrition Humaine Auvergne, University Clermont Auvergne, Inserm U1071, INRAE USC 1382, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, France
- Institut Universitaire de Technologie, University Clermont Auvergne, Clermont-Ferrand, France
| | - Amel Mettouchi
- Institut Pasteur, University of Paris, CNRS UMR2001, Paris, France
| | | | - Richard Bonnet
- Centre de Recherche en Nutrition Humaine Auvergne, University Clermont Auvergne, Inserm U1071, INRAE USC 1382, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, France
- Department of Bacteriology, University Hospital of Clermont-Ferrand, Clermont-Ferrand, France
| | - Julien Delmas
- Centre de Recherche en Nutrition Humaine Auvergne, University Clermont Auvergne, Inserm U1071, INRAE USC 1382, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, France
- Department of Bacteriology, University Hospital of Clermont-Ferrand, Clermont-Ferrand, France
| |
Collapse
|
4
|
Petracchini S, Hamaoui D, Doye A, Asnacios A, Fage F, Vitiello E, Balland M, Janel S, Lafont F, Gupta M, Ladoux B, Gilleron J, Maia TM, Impens F, Gagnoux-Palacios L, Daugaard M, Sorensen PH, Lemichez E, Mettouchi A. Optineurin links Hace1-dependent Rac ubiquitylation to integrin-mediated mechanotransduction to control bacterial invasion and cell division. Nat Commun 2022; 13:6059. [PMID: 36229487 PMCID: PMC9561704 DOI: 10.1038/s41467-022-33803-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 09/30/2022] [Indexed: 12/24/2022] Open
Abstract
Extracellular matrix (ECM) elasticity is perceived by cells via focal adhesion structures, which transduce mechanical cues into chemical signalling to conform cell behavior. Although the contribution of ECM compliance to the control of cell migration or division is extensively studied, little is reported regarding infectious processes. We study this phenomenon with the extraintestinal Escherichia coli pathogen UTI89. We show that UTI89 takes advantage, via its CNF1 toxin, of integrin mechanoactivation to trigger its invasion into cells. We identify the HACE1 E3 ligase-interacting protein Optineurin (OPTN) as a protein regulated by ECM stiffness. Functional analysis establishes a role of OPTN in bacterial invasion and integrin mechanical coupling and for stimulation of HACE1 E3 ligase activity towards the Rac1 GTPase. Consistent with a role of OPTN in cell mechanics, OPTN knockdown cells display defective integrin-mediated traction force buildup, associated with limited cellular invasion by UTI89. Nevertheless, OPTN knockdown cells display strong mechanochemical adhesion signalling, enhanced Rac1 activation and increased cyclin D1 translation, together with enhanced cell proliferation independent of ECM stiffness. Together, our data ascribe a new function to OPTN in mechanobiology.
Collapse
Affiliation(s)
- Serena Petracchini
- grid.508487.60000 0004 7885 7602Institut Pasteur, Université Paris Cité, CNRS UMR6047, INSERM U1306, Unité des Toxines Bactériennes, F-75015 Paris, France
| | - Daniel Hamaoui
- grid.462370.40000 0004 0620 5402Université Côte d’Azur, INSERM, C3M, Team Microbial Toxins in Host-Pathogen Interactions, Nice, France ,Equipe Labellisée Ligue Contre le Cancer, Nice, France
| | - Anne Doye
- grid.462370.40000 0004 0620 5402Université Côte d’Azur, INSERM, C3M, Team Microbial Toxins in Host-Pathogen Interactions, Nice, France ,Equipe Labellisée Ligue Contre le Cancer, Nice, France
| | - Atef Asnacios
- grid.463714.3Université Paris Cité, CNRS, Laboratoire Matière et Systèmes Complexes, UMR7057, F-75013 Paris, France
| | - Florian Fage
- grid.463714.3Université Paris Cité, CNRS, Laboratoire Matière et Systèmes Complexes, UMR7057, F-75013 Paris, France
| | - Elisa Vitiello
- grid.462689.70000 0000 9272 9931Université Grenoble Alpes, CNRS, LiPhy, F-38000 Grenoble, France
| | - Martial Balland
- grid.462689.70000 0000 9272 9931Université Grenoble Alpes, CNRS, LiPhy, F-38000 Grenoble, France
| | - Sebastien Janel
- grid.410463.40000 0004 0471 8845Université de Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019-UMR9017, CIIL—Center for Infection and Immunity of Lille, F-59000 Lille, France
| | - Frank Lafont
- grid.410463.40000 0004 0471 8845Université de Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019-UMR9017, CIIL—Center for Infection and Immunity of Lille, F-59000 Lille, France
| | - Mukund Gupta
- grid.461913.80000 0001 0676 2143Université Paris Cité, CNRS, Institut Jacques Monod, F-75013 Paris, France
| | - Benoit Ladoux
- grid.461913.80000 0001 0676 2143Université Paris Cité, CNRS, Institut Jacques Monod, F-75013 Paris, France
| | - Jerôme Gilleron
- grid.462370.40000 0004 0620 5402Université Côte d’Azur, INSERM, C3M, Team Cellular and Molecular Pathophysiology of Obesity and Diabetes, Nice, France
| | - Teresa M. Maia
- grid.511525.7VIB-UGent Center for Medical Biotechnology, VIB, Ghent, Belgium ,grid.5342.00000 0001 2069 7798Department of Biomolecular Medicine, Ghent University, Ghent, Belgium ,grid.11486.3a0000000104788040VIB Proteomics Core, VIB, Ghent, Belgium
| | - Francis Impens
- grid.511525.7VIB-UGent Center for Medical Biotechnology, VIB, Ghent, Belgium ,grid.5342.00000 0001 2069 7798Department of Biomolecular Medicine, Ghent University, Ghent, Belgium ,grid.11486.3a0000000104788040VIB Proteomics Core, VIB, Ghent, Belgium
| | - Laurent Gagnoux-Palacios
- grid.461605.0Université Côte d’Azur, CNRS, INSERM, Institut de Biologie Valrose (iBV), 06108 Nice, France
| | - Mads Daugaard
- grid.412541.70000 0001 0684 7796Vancouver Prostate Centre, Vancouver, BC V6H 3Z6 Canada ,grid.17091.3e0000 0001 2288 9830Department of Urologic Sciences, University of British Columbia, Vancouver, BC Canada
| | - Poul H. Sorensen
- grid.17091.3e0000 0001 2288 9830Department of Molecular Oncology, BC Cancer Research Center, University of British Columbia, Vancouver, BC V5Z1L3 Canada
| | - Emmanuel Lemichez
- grid.508487.60000 0004 7885 7602Institut Pasteur, Université Paris Cité, CNRS UMR6047, INSERM U1306, Unité des Toxines Bactériennes, F-75015 Paris, France ,grid.462370.40000 0004 0620 5402Université Côte d’Azur, INSERM, C3M, Team Microbial Toxins in Host-Pathogen Interactions, Nice, France ,Equipe Labellisée Ligue Contre le Cancer, Nice, France
| | - Amel Mettouchi
- grid.508487.60000 0004 7885 7602Institut Pasteur, Université Paris Cité, CNRS UMR6047, INSERM U1306, Unité des Toxines Bactériennes, F-75015 Paris, France ,grid.462370.40000 0004 0620 5402Université Côte d’Azur, INSERM, C3M, Team Microbial Toxins in Host-Pathogen Interactions, Nice, France ,Equipe Labellisée Ligue Contre le Cancer, Nice, France
| |
Collapse
|
5
|
Tsoumtsa Meda LL, Landraud L, Petracchini S, Descorps-Declere S, Perthame E, Nahori MA, Ramirez Finn L, Ingersoll MA, Patiño-Navarrete R, Glaser P, Bonnet R, Dussurget O, Denamur E, Mettouchi A, Lemichez E. The cnf1 gene is associated with an expanding Escherichia coli ST131 H30Rx/C2 subclade and confers a competitive advantage for gut colonization. Gut Microbes 2022; 14:2121577. [PMID: 36154446 PMCID: PMC9519008 DOI: 10.1080/19490976.2022.2121577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Epidemiological projections point to acquisition of ever-expanding multidrug resistance (MDR) by Escherichia coli, a commensal of the digestive tract and a source of urinary tract pathogens. Bioinformatics analyses of a large collection of E. coli genomes from EnteroBase, enriched in clinical isolates of worldwide origins, suggest the Cytotoxic Necrotizing Factor 1 (CNF1)-toxin encoding gene, cnf1, is preferentially distributed in four common sequence types (ST) encompassing the pandemic E. coli MDR lineage ST131. This lineage is responsible for a majority of extraintestinal infections that escape first-line antibiotic treatment, with known enhanced capacities to colonize the gastrointestinal tract. Statistical projections based on this dataset point to a global expansion of cnf1-positive multidrug-resistant ST131 strains from subclade H30Rx/C2, accounting for a rising prevalence of cnf1-positive strains in ST131. Despite the absence of phylogeographical signals, cnf1-positive isolates segregated into clusters in the ST131-H30Rx/C2 phylogeny, sharing a similar profile of virulence factors and the same cnf1 allele. The suggested dominant expansion of cnf1-positive strains in ST131-H30Rx/C2 led us to uncover the competitive advantage conferred by cnf1 for gut colonization to the clinical strain EC131GY ST131-H30Rx/C2 versus cnf1-deleted isogenic strain. Complementation experiments showed that colon tissue invasion was compromised in the absence of deamidase activity on Rho GTPases by CNF1. Hence, gut colonization factor function of cnf1 was confirmed for another clinical strain ST131-H30Rx/C2. In addition, functional analysis of the cnf1-positive clinical strain EC131GY ST131-H30Rx/C2 and a cnf1-deleted isogenic strain showed no detectable impact of the CNF1 gene on bacterial fitness and inflammation during the acute phase of bladder monoinfection. Together these data argue for an absence of role of CNF1 in virulence during UTI, while enhancing gut colonization capacities of ST131-H30Rx/C2 and suggested expansion of cnf1-positive MDR isolates in subclade ST131-H30Rx/C2.
Collapse
Affiliation(s)
- Landry L. Tsoumtsa Meda
- Institut Pasteur, Université Paris Cité, CNRS UMR6047, INSERM U1306, Unité des Toxines Bactériennes, Département de Microbiologie, Paris, France
| | - Luce Landraud
- Université Paris Cité et Université Sorbonne Paris Nord, INSERM U1137, IAME, Paris, France,Laboratoire Microbiologie-hygiène, AP-HP, Hôpital Louis Mourier, Colombes, France
| | - Serena Petracchini
- Institut Pasteur, Université Paris Cité, CNRS UMR6047, INSERM U1306, Unité des Toxines Bactériennes, Département de Microbiologie, Paris, France
| | - Stéphane Descorps-Declere
- Institut Pasteur, Université Paris Cité, CNRS UMR6047, INSERM U1306, Unité des Toxines Bactériennes, Département de Microbiologie, Paris, France,Institut Pasteur, Université Paris Cité, Bioinformatics and Biostatistics Hub, Paris, France
| | - Emeline Perthame
- Institut Pasteur, Université Paris Cité, Bioinformatics and Biostatistics Hub, Paris, France
| | - Marie-Anne Nahori
- Institut Pasteur, Université Paris Cité, CNRS UMR6047, INSERM U1306, Unité des Toxines Bactériennes, Département de Microbiologie, Paris, France
| | - Laura Ramirez Finn
- Institut Pasteur, Department of Immunology, Mucosal Inflammation and Immunity group, Paris, France,Université Paris Cité, Institut Cochin, CNRS UMR8104, INSERM U1016, Paris, France
| | - Molly A. Ingersoll
- Institut Pasteur, Department of Immunology, Mucosal Inflammation and Immunity group, Paris, France,Université Paris Cité, Institut Cochin, CNRS UMR8104, INSERM U1016, Paris, France
| | - Rafael Patiño-Navarrete
- Institut Pasteur, Université Paris Cité, CNRS UMR6047, Unité Ecologie et Evolution de la Résistance aux Antibiotiques, Département de Microbiologie, Paris, France
| | - Philippe Glaser
- Institut Pasteur, Université Paris Cité, CNRS UMR6047, Unité Ecologie et Evolution de la Résistance aux Antibiotiques, Département de Microbiologie, Paris, France
| | - Richard Bonnet
- UMR INSERM U1071, INRA USC-2018, Université Clermont Auvergne, Clermont-Ferrand, France,Centre National de Référence de la Résistance aux Antibiotiques, Centre Hospitalier Universitaire, Clermont-Ferrand, France
| | - Olivier Dussurget
- Institut Pasteur, Université Paris Cité, CNRS UMR6047, Unité de Recherche Yersinia, Département de Microbiologie, Paris, France
| | - Erick Denamur
- Université Paris Cité et Université Sorbonne Paris Nord, INSERM U1137, IAME, Paris, France,AP-HP, Laboratoire de Génétique Moléculaire, Hôpital Bichat, Paris, France
| | - Amel Mettouchi
- Institut Pasteur, Université Paris Cité, CNRS UMR6047, INSERM U1306, Unité des Toxines Bactériennes, Département de Microbiologie, Paris, France,Amel Mettouchi Institut Pasteur, Université Paris Cité, CNRS UMR6047, INSERM U1306, Unité des Toxines Bactériennes, Département de Microbiologie, 75015Paris, France
| | - Emmanuel Lemichez
- Institut Pasteur, Université Paris Cité, CNRS UMR6047, INSERM U1306, Unité des Toxines Bactériennes, Département de Microbiologie, Paris, France,CONTACT Emmanuel Lemichez
| |
Collapse
|
6
|
Tsai MC, Fleuriot L, Janel S, Gonzalez-Rodriguez D, Morel C, Mettouchi A, Debayle D, Dallongeville S, Olivo-Marin JC, Antonny B, Lafont F, Lemichez E, Barelli H. DHA-phospholipids control membrane fusion and transcellular tunnel dynamics. J Cell Sci 2021; 135:273659. [PMID: 34878112 DOI: 10.1242/jcs.259119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 11/27/2021] [Indexed: 11/20/2022] Open
Abstract
Metabolic studies and animal knockout models point to the critical role of polyunsaturated docosahexaenoic acid (22:6, DHA)-containing phospholipids (PLs) in physiology. Here, we investigated the impact of DHA-PLs on the dynamics of transendothelial cell macroapertures (TEMs) triggered by RhoA inhibition-associated cell spreading. Lipidomic analyses show that human umbilical vein endothelial cells (HUVECs) subjected to DHA-diet undergo a 6-fold enrichment in DHA-PLs at plasma membrane (PM) at the expense of monounsaturated OA-PLs. Consequently, DHA-PLs enrichment at the PM induces a reduction of cell thickness and shifts cellular membranes towards a permissive mode of membrane fusion for transcellular tunnel initiation. We provide evidence that a global homeostatic control of membrane tension and cell cortex rigidity minimizes overall changes of TEM area through a decrease of TEM size and lifetime. Conversely, low DHA-PL levels at the PM leads to the opening of unstable and wider TEMs. Together, this provides evidence that variations of DHA-PLs levels in membranes affect cell biomechanical properties.
Collapse
Affiliation(s)
- Meng-Chen Tsai
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, CNRS and Université Côte d'Azur, 06560, Valbonne, France.,Institut Pasteur, Université de Paris, CNRS UMR2001, Unité des Toxines Bactériennes, 75015 Paris, France
| | - Lucile Fleuriot
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, CNRS and Université Côte d'Azur, 06560, Valbonne, France
| | - Sébastien Janel
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, F-59000 Lille, France
| | | | - Camille Morel
- Institut Pasteur, Université de Paris, CNRS UMR2001, Unité des Toxines Bactériennes, 75015 Paris, France
| | - Amel Mettouchi
- Institut Pasteur, Université de Paris, CNRS UMR2001, Unité des Toxines Bactériennes, 75015 Paris, France
| | - Delphine Debayle
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, CNRS and Université Côte d'Azur, 06560, Valbonne, France
| | | | | | - Bruno Antonny
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, CNRS and Université Côte d'Azur, 06560, Valbonne, France
| | - Frank Lafont
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, F-59000 Lille, France
| | - Emmanuel Lemichez
- Institut Pasteur, Université de Paris, CNRS UMR2001, Unité des Toxines Bactériennes, 75015 Paris, France
| | - Hélène Barelli
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, CNRS and Université Côte d'Azur, 06560, Valbonne, France
| |
Collapse
|
7
|
Torrino S, Roustan FR, Kaminski L, Bertero T, Pisano S, Ambrosetti D, Dufies M, Uhler JP, Lemichez E, Mettouchi A, Gesson M, Laurent K, Gaggioli C, Michiels JF, Lamaze C, Bost F, Clavel S. UBTD1 is a mechano-regulator controlling cancer aggressiveness. EMBO Rep 2019; 20:embr.201846570. [PMID: 30804013 DOI: 10.15252/embr.201846570] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 01/18/2019] [Accepted: 01/29/2019] [Indexed: 12/18/2022] Open
Abstract
Ubiquitin domain-containing protein 1 (UBTD1) is highly evolutionary conserved and has been described to interact with E2 enzymes of the ubiquitin-proteasome system. However, its biological role and the functional significance of this interaction remain largely unknown. Here, we demonstrate that depletion of UBTD1 drastically affects the mechanical properties of epithelial cancer cells via RhoA activation and strongly promotes their aggressiveness. On a stiff matrix, UBTD1 expression is regulated by cell-cell contacts, and the protein is associated with β-catenin at cell junctions. Yes-associated protein (YAP) is a major cell mechano-transducer, and we show that UBTD1 is associated with components of the YAP degradation complex. Interestingly, UBTD1 promotes the interaction of YAP with its E3 ubiquitin ligase β-TrCP Consequently, in cancer cells, UBTD1 depletion decreases YAP ubiquitylation and triggers robust ROCK2-dependent YAP activation and downstream signaling. Data from lung and prostate cancer patients further corroborate the in cellulo results, confirming that low levels of UBTD1 are associated with poor patient survival, suggesting that biological functions of UBTD1 could be beneficial in limiting cancer progression.
Collapse
Affiliation(s)
- Stéphanie Torrino
- Centre Méditerranéen de Médecine Moléculaire (C3M), Inserm U1065, Nice Cedex 3, France
| | - François-René Roustan
- Centre Méditerranéen de Médecine Moléculaire (C3M), Inserm U1065, Nice Cedex 3, France
| | - Lisa Kaminski
- Centre Méditerranéen de Médecine Moléculaire (C3M), Inserm U1065, Nice Cedex 3, France
| | - Thomas Bertero
- Institute for Research on Cancer and Aging, Nice (IRCAN), CNRS, UMR7284/INSERM U1081, Université Côte d'Azur, Nice, France
| | - Sabrina Pisano
- Institute for Research on Cancer and Aging, Nice (IRCAN), CNRS, UMR7284/INSERM U1081, Université Côte d'Azur, Nice, France
| | - Damien Ambrosetti
- Department of Pathology, Nice University Hospital University of Nice Sophia Antipolis, Nice, France
| | - Maeva Dufies
- Institute for Research on Cancer and Aging, Nice (IRCAN), CNRS, UMR7284/INSERM U1081, Université Côte d'Azur, Nice, France
| | - Jay P Uhler
- Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Emmanuel Lemichez
- Département de Microbiologie, Institut Pasteur, Unité des Toxines Bactériennes, Université Paris Descartes, Paris, France
| | - Amel Mettouchi
- Département de Microbiologie, Institut Pasteur, Unité des Toxines Bactériennes, Université Paris Descartes, Paris, France
| | - Maeva Gesson
- Centre Méditerranéen de Médecine Moléculaire (C3M), Inserm U1065, Nice Cedex 3, France
| | - Kathiane Laurent
- Centre Méditerranéen de Médecine Moléculaire (C3M), Inserm U1065, Nice Cedex 3, France
| | - Cedric Gaggioli
- Institute for Research on Cancer and Aging, Nice (IRCAN), CNRS, UMR7284/INSERM U1081, Université Côte d'Azur, Nice, France
| | - Jean-Francois Michiels
- Department of Pathology, Nice University Hospital University of Nice Sophia Antipolis, Nice, France
| | - Christophe Lamaze
- CNRS UMR3666, INSERM U1143, Membrane Dynamics and Mechanics of Intracellular Signaling Laboratory, Institut Curie - Centre de Recherche, PSL Research University, Paris, France
| | - Frédéric Bost
- Centre Méditerranéen de Médecine Moléculaire (C3M), Inserm U1065, Nice Cedex 3, France
| | - Stéphan Clavel
- Centre Méditerranéen de Médecine Moléculaire (C3M), Inserm U1065, Nice Cedex 3, France
| |
Collapse
|
8
|
Vitiello E, Moreau P, Nunes V, Mettouchi A, Maiato H, Ferreira JG, Wang I, Balland M. Acto-myosin force organization modulates centriole separation and PLK4 recruitment to ensure centriole fidelity. Nat Commun 2019; 10:52. [PMID: 30604763 PMCID: PMC6318293 DOI: 10.1038/s41467-018-07965-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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: 08/22/2017] [Accepted: 11/19/2018] [Indexed: 01/09/2023] Open
Abstract
The presence of aberrant number of centrioles is a recognized cause of aneuploidy and hallmark of cancer. Hence, centriole duplication needs to be tightly regulated. It has been proposed that centriole separation limits centrosome duplication. The mechanism driving centriole separation is poorly understood and little is known on how this is linked to centriole duplication. Here, we propose that actin-generated forces regulate centriole separation. By imposing geometric constraints via micropatterns, we were able to prove that precise acto-myosin force arrangements control direction, distance and time of centriole separation. Accordingly, inhibition of acto-myosin contractility impairs centriole separation. Alongside, we observed that organization of acto-myosin force modulates specifically the length of S-G2 phases of the cell cycle, PLK4 recruitment at the centrosome and centriole fidelity. These discoveries led us to suggest that acto-myosin forces might act in fundamental mechanisms of aneuploidy prevention. Centriolar separation is thought to be crucial for centriole duplication, but the mechanism behind separation is poorly understood. Here, using micropatterning, the authors report that actomyosin forces influence the direction, distance, and time of centriole separation.
Collapse
Affiliation(s)
- Elisa Vitiello
- Laboratoire interdisciplinaire de Physique, Université Joseph Fourier (Grenoble 1), Domaine universitaire, Bat. E45 140, Rue de la physique, BP 87, 38402, Saint Martin d'Hères, Cedex 9, France.
| | - Philippe Moreau
- Laboratoire interdisciplinaire de Physique, Université Joseph Fourier (Grenoble 1), Domaine universitaire, Bat. E45 140, Rue de la physique, BP 87, 38402, Saint Martin d'Hères, Cedex 9, France
| | - Vanessa Nunes
- Chromosome Instability & Dynamics Laboratory, Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal.,Instituto de Investigação e Inovação em Saúde-i3S, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal
| | - Amel Mettouchi
- Institut Pasteur, Département de Microbiologie, Unité des Toxines Bactériennes, Université Paris Descartes, 25-28 Rue du Dr Roux, 75015, Paris, France
| | - Helder Maiato
- Chromosome Instability & Dynamics Laboratory, Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal.,Instituto de Investigação e Inovação em Saúde-i3S, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal.,Cell Division Group, Experimental Biology Unit, Department of Biomedicine, Faculdade de Medicina, Universidade do Porto, Alameda Prof. Hernâni Monteiro, 4200-319, Porto, Portugal
| | - Jorge G Ferreira
- Chromosome Instability & Dynamics Laboratory, Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal.,Instituto de Investigação e Inovação em Saúde-i3S, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal.,Cell Division Group, Experimental Biology Unit, Department of Biomedicine, Faculdade de Medicina, Universidade do Porto, Alameda Prof. Hernâni Monteiro, 4200-319, Porto, Portugal
| | - Irène Wang
- Laboratoire interdisciplinaire de Physique, Université Joseph Fourier (Grenoble 1), Domaine universitaire, Bat. E45 140, Rue de la physique, BP 87, 38402, Saint Martin d'Hères, Cedex 9, France
| | - Martial Balland
- Laboratoire interdisciplinaire de Physique, Université Joseph Fourier (Grenoble 1), Domaine universitaire, Bat. E45 140, Rue de la physique, BP 87, 38402, Saint Martin d'Hères, Cedex 9, France
| |
Collapse
|
9
|
Gagnoux-Palacios L, Awina H, Audebert S, Rossin A, Mondin M, Borgese F, Planas-Botey C, Mettouchi A, Borg JP, Hueber AO. Cell polarity and adherens junction formation inhibit epithelial Fas cell death receptor signaling. J Cell Biol 2018; 217:3839-3852. [PMID: 30242034 PMCID: PMC6219722 DOI: 10.1083/jcb.201805071] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/27/2018] [Accepted: 08/24/2018] [Indexed: 12/19/2022] Open
Abstract
Control of epithelial cell death is crucial to maintaining tissue integrity. Gagnoux-Palacios et al. show that cell polarity and adherens junction formation prevent proapoptotic signals emanating from the Fas death receptor. Therefore, Fas-dependent cell death contributes to the elimination of nonpolarized or nonadherent cells from human epithelia. Finely tuned regulation of epithelial cell death maintains tissue integrity and homeostasis. At the cellular level, life and death decisions are controlled by environmental stimuli such as the activation of death receptors. We show that cell polarity and adherens junction formation prevent proapoptotic signals emanating from the Fas death receptor. Fas is sequestered in E-cadherin actin-based adhesion structures that are less able to induce downstream apoptosis signaling. Using a proteomic-based approach, we find that the polarity molecule Dlg1 interacts with the C-terminal PDZ-binding site in Fas and that this interaction decreases formation of the death-inducing complex upon engagement with Fas ligand (FasL), thus acting as an additional cell death protection mechanism. We propose that E-cadherin and Dlg1 inhibit FasL-induced cell death by two complementary but partially independent mechanisms that help to maintain epithelial homeostasis by protecting normal polarized epithelia from apoptosis. When polarity is lost, the Fas–cadherin–Dlg1 antiapoptotic complex is disrupted, and FasL can promote the elimination of compromised nonpolarized cells.
Collapse
Affiliation(s)
- Laurent Gagnoux-Palacios
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Inserm, Institute de Biologie Valrose, Nice, France
| | - Hala Awina
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Inserm, Institute de Biologie Valrose, Nice, France
| | - Stéphane Audebert
- Aix Marseille Université, Centre National de la Recherche Scientifique, Inserm, Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille, Marseille Proteomics, Marseille, France
| | - Aurélie Rossin
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Inserm, Institute de Biologie Valrose, Nice, France
| | - Magali Mondin
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Inserm, Institute de Biologie Valrose, Nice, France
| | - Franck Borgese
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Inserm, Institute de Biologie Valrose, Nice, France
| | - Carlota Planas-Botey
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Inserm, Institute de Biologie Valrose, Nice, France
| | - Amel Mettouchi
- Institut Pasteur, Département de Microbiologie, Unité des Toxines Bactériennes, Université Paris Descartes, Paris, France
| | - Jean-Paul Borg
- Aix Marseille Université, Centre National de la Recherche Scientifique, Inserm, Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille, Marseille Proteomics, Marseille, France.,Centre de Recherche en Cancérologie de Marseille, Cell Polarity, Cell Signaling, and Cancer, Equipe Labellisée Ligue Contre le Cancer, Aix Marseille Université, Centre National de la Recherche Scientifique, Inserm, Institut Paoli-Calmettes, Marseille, France
| | - Anne-Odile Hueber
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Inserm, Institute de Biologie Valrose, Nice, France
| |
Collapse
|
10
|
Ho M, Mettouchi A, Wilson BA, Lemichez E. CNF1-like deamidase domains: common Lego bricks among cancer-promoting immunomodulatory bacterial virulence factors. Pathog Dis 2018; 76:4992304. [PMID: 29733372 DOI: 10.1093/femspd/fty045] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Accepted: 05/01/2018] [Indexed: 12/28/2022] Open
Abstract
Alterations of the cellular proteome over time due to spontaneous or toxin-mediated enzymatic deamidation of glutamine (Gln) and asparagine (Asn) residues contribute to bacterial infection and might represent a source of aging-related diseases. Here, we put into perspective what is known about the mode of action of the CNF1 toxin from pathogenic Escherichia coli, a paradigm of bacterial deamidases that activate Rho GTPases, to illustrate the importance of determining whether exposure to these factors are risk factors in the etiology age-related diseases, such as cancer. In particular, through in silico analysis of the distribution of the CNF1-like deamidase active site Gly-Cys-(Xaa)n-His sequence motif in bacterial genomes, we unveil the wide distribution of the super-family of CNF-like toxins and CNF-like deamidase domains among members of the Enterobacteriacae and in association with a large variety of toxin delivery systems. We extent our discussion with recent findings concerning cellular systems that control activated Rac1 GTPase stability and provide protection against cancer. These findings point to the urgency for developing holistic approaches toward personalized medicine that include monitoring for asymptomatic carriage of pathogenic toxin-producing bacteria and that ultimately might lead to improved public health and increased lifespans.
Collapse
Affiliation(s)
- Mengfei Ho
- Department of Microbiology, School of Molecular and Cellular Biology, University of Illinois at Urbana-Champaign, Illinois 61801, USA
| | - Amel Mettouchi
- Bacterial Toxins Unit, Department of Microbiology, Institut Pasteur, 25 Rue du Docteur Roux, 75724 Paris, France
| | - Brenda A Wilson
- Department of Microbiology, School of Molecular and Cellular Biology, University of Illinois at Urbana-Champaign, Illinois 61801, USA
| | - Emmanuel Lemichez
- Bacterial Toxins Unit, Department of Microbiology, Institut Pasteur, 25 Rue du Docteur Roux, 75724 Paris, France
| |
Collapse
|
11
|
Rolando M, Stefani C, Doye A, Acosta MI, Visvikis O, Yevick HG, Buchrieser C, Mettouchi A, Bassereau P, Lemichez E. Contractile actin cables induced by Bacillus anthracis lethal toxin depend on the histone acetylation machinery. Cytoskeleton (Hoboken) 2015; 72:542-56. [PMID: 26403219 DOI: 10.1002/cm.21256] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 09/18/2015] [Accepted: 09/22/2015] [Indexed: 12/25/2022]
Abstract
It remains a challenge to decode the molecular basis of the long-term actin cytoskeleton rearrangements that are governed by the reprogramming of gene expression. Bacillus anthracis lethal toxin (LT) inhibits mitogen-activated protein kinase (MAPK) signaling, thereby modulating gene expression, with major consequences for actin cytoskeleton organization and the loss of endothelial barrier function. Using a laser ablation approach, we characterized the contractile and tensile mechanical properties of LT-induced stress fibers. These actin cables resist pulling forces that are transmitted at cell-matrix interfaces and at cell-cell discontinuous adherens junctions. We report that treating the cells with trichostatin A (TSA), a broad range inhibitor of histone deacetylases (HDACs), or with MS-275, which targets HDAC1, 2 and 3, induces stress fibers. LT decreased the cellular levels of HDAC1, 2 and 3 and reduced the global HDAC activity in the nucleus. Both the LT and TSA treatments induced Rnd3 expression, which is required for the LT-mediated induction of actin stress fibers. Furthermore, we reveal that treating the LT-intoxicated cells with garcinol, an inhibitor of histone acetyl-transferases (HATs), disrupts the stress fibers and limits the monolayer barrier dysfunctions. These data demonstrate the importance of modulating the flux of protein acetylation in order to control actin cytoskeleton organization and the endothelial cell monolayer barrier.
Collapse
Affiliation(s)
- Monica Rolando
- Microbial Toxins in Host-Pathogen Interactions, Equipe Labellisée La Ligue Contre Le Cancer, INSERM, U1065, Centre Méditerranéen De Médecine Moléculaire (C3M), 151 Route St Antoine de Ginestière, BP 2 3194, 06204 Nice Cedex, France.,UFR Médecine, IFR50, Faculté De Médecine, Université De Nice-Sophia Antipolis, Nice, France.,Biologie Des Bactéries Intracellulaires, Institut Pasteur, Paris, France.,UMR 3525, CNRS, Paris, France
| | - Caroline Stefani
- Microbial Toxins in Host-Pathogen Interactions, Equipe Labellisée La Ligue Contre Le Cancer, INSERM, U1065, Centre Méditerranéen De Médecine Moléculaire (C3M), 151 Route St Antoine de Ginestière, BP 2 3194, 06204 Nice Cedex, France.,UFR Médecine, IFR50, Faculté De Médecine, Université De Nice-Sophia Antipolis, Nice, France.,Immunology Program, Benaroya Research Institute at Virginia Mason, Seattle, WA 98101, USA
| | - Anne Doye
- Microbial Toxins in Host-Pathogen Interactions, Equipe Labellisée La Ligue Contre Le Cancer, INSERM, U1065, Centre Méditerranéen De Médecine Moléculaire (C3M), 151 Route St Antoine de Ginestière, BP 2 3194, 06204 Nice Cedex, France.,UFR Médecine, IFR50, Faculté De Médecine, Université De Nice-Sophia Antipolis, Nice, France
| | - Maria I Acosta
- Microbial Toxins in Host-Pathogen Interactions, Equipe Labellisée La Ligue Contre Le Cancer, INSERM, U1065, Centre Méditerranéen De Médecine Moléculaire (C3M), 151 Route St Antoine de Ginestière, BP 2 3194, 06204 Nice Cedex, France.,UFR Médecine, IFR50, Faculté De Médecine, Université De Nice-Sophia Antipolis, Nice, France
| | - Orane Visvikis
- Microbial Toxins in Host-Pathogen Interactions, Equipe Labellisée La Ligue Contre Le Cancer, INSERM, U1065, Centre Méditerranéen De Médecine Moléculaire (C3M), 151 Route St Antoine de Ginestière, BP 2 3194, 06204 Nice Cedex, France.,UFR Médecine, IFR50, Faculté De Médecine, Université De Nice-Sophia Antipolis, Nice, France
| | - Hannah G Yevick
- Institut Curie-Centre de Recherche, Membrane and Cell Functions Group; CNRS UMR 168, Physico-Chimie Curie, Université Pierre et Marie Curie, 26 Rue d'ulm, Paris Cedex 05, 75248, France
| | - Carmen Buchrieser
- Biologie Des Bactéries Intracellulaires, Institut Pasteur, Paris, France.,UMR 3525, CNRS, Paris, France
| | - Amel Mettouchi
- Microbial Toxins in Host-Pathogen Interactions, Equipe Labellisée La Ligue Contre Le Cancer, INSERM, U1065, Centre Méditerranéen De Médecine Moléculaire (C3M), 151 Route St Antoine de Ginestière, BP 2 3194, 06204 Nice Cedex, France.,UFR Médecine, IFR50, Faculté De Médecine, Université De Nice-Sophia Antipolis, Nice, France
| | - Patricia Bassereau
- Institut Curie-Centre de Recherche, Membrane and Cell Functions Group; CNRS UMR 168, Physico-Chimie Curie, Université Pierre et Marie Curie, 26 Rue d'ulm, Paris Cedex 05, 75248, France
| | - Emmanuel Lemichez
- Microbial Toxins in Host-Pathogen Interactions, Equipe Labellisée La Ligue Contre Le Cancer, INSERM, U1065, Centre Méditerranéen De Médecine Moléculaire (C3M), 151 Route St Antoine de Ginestière, BP 2 3194, 06204 Nice Cedex, France.,UFR Médecine, IFR50, Faculté De Médecine, Université De Nice-Sophia Antipolis, Nice, France
| |
Collapse
|
12
|
Abnave P, Mottola G, Gimenez G, Boucherit N, Trouplin V, Torre C, Conti F, Ben Amara A, Lepolard C, Djian B, Hamaoui D, Mettouchi A, Kumar A, Pagnotta S, Bonatti S, Lepidi H, Salvetti A, Abi-Rached L, Lemichez E, Mege JL, Ghigo E. Screening in planarians identifies MORN2 as a key component in LC3-associated phagocytosis and resistance to bacterial infection. Cell Host Microbe 2015; 16:338-50. [PMID: 25211076 DOI: 10.1016/j.chom.2014.08.002] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 06/13/2014] [Accepted: 07/10/2014] [Indexed: 01/21/2023]
Abstract
Dugesia japonica planarian flatworms are naturally exposed to various microbes but typically survive this challenge. We show that planarians eliminate bacteria pathogenic to Homo sapiens, Caenorhabditis elegans, and/or Drosophila melanogaster and thus represent a model to identify innate resistance mechanisms. Whole-transcriptome analysis coupled with RNAi screening of worms infected with Staphylococcus aureus or Legionella pneumophila identified 18 resistance genes with nine human orthologs, of which we examined the function of MORN2. Human MORN2 facilitates phagocytosis-mediated restriction of Mycobacterium tuberculosis, L. pneumophila, and S. aureus in macrophages. MORN2 promotes the recruitment of LC3, an autophagy protein also involved in phagocytosis, to M. tuberculosis-containing phagosomes and subsequent maturation to degradative phagolysosomes. MORN2-driven trafficking of M. tuberculosis to single-membrane, LC3-positive compartments requires autophagy-related proteins Atg5 and Beclin-1, but not Ulk-1 and Atg13, highlighting the importance of MORN2 in LC3-associated phagocytosis. These findings underscore the value of studying planarian defenses to identify immune factors.
Collapse
Affiliation(s)
- Prasad Abnave
- CNRS UMR 7278, IRD198, INSERM U1095, Aix-Marseille Université, 27 Bd Jean Moulin 13385 Marseille Cedex 05, France; INSERM, U1065, C3M, Université de Nice Sophia-Antipolis, Equipe labellisée ligue contre le cancer, 06204 Nice Cedex 3, France
| | - Giovanna Mottola
- CNRS UMR 7278, IRD198, INSERM U1095, Aix-Marseille Université, 27 Bd Jean Moulin 13385 Marseille Cedex 05, France; Department of Molecular Medicine and Medical Biotechnology, University of Naples "Federico II," Via S. Pansini 5, 80131 Naples, Italy
| | - Gregory Gimenez
- Otago Genomics & Bioinformatics Facility, Department of Biochemistry, University of Otago, PO Box 56, 710 Cumberland Street, Dunedin 9054, New Zealand
| | - Nicolas Boucherit
- CNRS UMR 7278, IRD198, INSERM U1095, Aix-Marseille Université, 27 Bd Jean Moulin 13385 Marseille Cedex 05, France
| | - Virginie Trouplin
- CNRS UMR 7278, IRD198, INSERM U1095, Aix-Marseille Université, 27 Bd Jean Moulin 13385 Marseille Cedex 05, France
| | - Cedric Torre
- CNRS UMR 7278, IRD198, INSERM U1095, Aix-Marseille Université, 27 Bd Jean Moulin 13385 Marseille Cedex 05, France
| | - Filippo Conti
- CNRS UMR 7278, IRD198, INSERM U1095, Aix-Marseille Université, 27 Bd Jean Moulin 13385 Marseille Cedex 05, France; INSERM, U1065, C3M, Université de Nice Sophia-Antipolis, Equipe labellisée ligue contre le cancer, 06204 Nice Cedex 3, France
| | - Amira Ben Amara
- CNRS UMR 7278, IRD198, INSERM U1095, Aix-Marseille Université, 27 Bd Jean Moulin 13385 Marseille Cedex 05, France
| | - Catherine Lepolard
- CNRS UMR 7278, IRD198, INSERM U1095, Aix-Marseille Université, 27 Bd Jean Moulin 13385 Marseille Cedex 05, France
| | - Benjamin Djian
- CNRS UMR 7278, IRD198, INSERM U1095, Aix-Marseille Université, 27 Bd Jean Moulin 13385 Marseille Cedex 05, France
| | - Daniel Hamaoui
- INSERM, U1065, C3M, Université de Nice Sophia-Antipolis, Equipe labellisée ligue contre le cancer, 06204 Nice Cedex 3, France
| | - Amel Mettouchi
- INSERM, U1065, C3M, Université de Nice Sophia-Antipolis, Equipe labellisée ligue contre le cancer, 06204 Nice Cedex 3, France
| | - Atul Kumar
- CNRS UMR 7278, IRD198, INSERM U1095, Aix-Marseille Université, 27 Bd Jean Moulin 13385 Marseille Cedex 05, France; INSERM, U1065, C3M, Université de Nice Sophia-Antipolis, Equipe labellisée ligue contre le cancer, 06204 Nice Cedex 3, France
| | - Sophie Pagnotta
- Centre Commun de Microscopie Appliquée (CCMA) Université de Nice Sophia Antipolis, Faculté des Sciences, Parc Valrose, 06108 Nice Cedex 2, France
| | - Stefano Bonatti
- Department of Molecular Medicine and Medical Biotechnology, University of Naples "Federico II," Via S. Pansini 5, 80131 Naples, Italy
| | - Hubert Lepidi
- CNRS UMR 7278, IRD198, INSERM U1095, Aix-Marseille Université, 27 Bd Jean Moulin 13385 Marseille Cedex 05, France
| | - Alessandra Salvetti
- Department of Clinical and Experimental Medicine, Unity of Experimental Biology and Genetics, University of Pisa, Via Volta 4, 56126 Pisa, Italy
| | - Laurent Abi-Rached
- Centre National de la Recherche Scientifique, Laboratoire d'Analyse, Topologie, Probabilités - Unité Mixte de Recherche 7353, Equipe ATIP, Aix-Marseille Université, 13331 Marseille, France
| | - Emmanuel Lemichez
- INSERM, U1065, C3M, Université de Nice Sophia-Antipolis, Equipe labellisée ligue contre le cancer, 06204 Nice Cedex 3, France
| | - Jean-Louis Mege
- CNRS UMR 7278, IRD198, INSERM U1095, Aix-Marseille Université, 27 Bd Jean Moulin 13385 Marseille Cedex 05, France
| | - Eric Ghigo
- CNRS UMR 7278, IRD198, INSERM U1095, Aix-Marseille Université, 27 Bd Jean Moulin 13385 Marseille Cedex 05, France.
| |
Collapse
|
13
|
Dirat B, Ader I, Golzio M, Massa F, Mettouchi A, Laurent K, Larbret F, Malavaud B, Cormont M, Lemichez E, Cuvillier O, Tanti JF, Bost F. Inhibition of the GTPase Rac1 mediates the antimigratory effects of metformin in prostate cancer cells. Mol Cancer Ther 2014; 14:586-96. [PMID: 25527635 DOI: 10.1158/1535-7163.mct-14-0102] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cell migration is a critical step in the progression of prostate cancer to the metastatic state, the lethal form of the disease. The antidiabetic drug metformin has been shown to display antitumoral properties in prostate cancer cell and animal models; however, its role in the formation of metastases remains poorly documented. Here, we show that metformin reduces the formation of metastases to fewer solid organs in an orthotopic metastatic prostate cancer cell model established in nude mice. As predicted, metformin hampers cell motility in PC3 and DU145 prostate cancer cells and triggers a radical reorganization of the cell cytoskeleton. The small GTPase Rac1 is a master regulator of cytoskeleton organization and cell migration. We report that metformin leads to a major inhibition of Rac1 GTPase activity by interfering with some of its multiple upstream signaling pathways, namely P-Rex1 (a Guanine nucleotide exchange factor and activator of Rac1), cAMP, and CXCL12/CXCR4, resulting in decreased migration of prostate cancer cells. Importantly, overexpression of a constitutively active form of Rac1, or P-Rex, as well as the inhibition of the adenylate cyclase, was able to reverse the antimigratory effects of metformin. These results establish a novel mechanism of action for metformin and highlight its potential antimetastatic properties in prostate cancer.
Collapse
Affiliation(s)
- Béatrice Dirat
- INSERM, C3M, U1065, Team Cellular and Molecular Physiopathology of Obesity and Diabetes, Nice, France. Univ. Nice Sophia Antipolis, C3M, U1065, Nice, France
| | - Isabelle Ader
- CNRS, Institut de Pharmacologie et de Biologie Structurale, Toulouse, France. Université de Toulouse, UPS, IPBS, Toulouse, France
| | - Muriel Golzio
- CNRS, Institut de Pharmacologie et de Biologie Structurale, Toulouse, France. Université de Toulouse, UPS, IPBS, Toulouse, France
| | - Fabienne Massa
- INSERM, C3M, U1065, Team Cellular and Molecular Physiopathology of Obesity and Diabetes, Nice, France. Univ. Nice Sophia Antipolis, C3M, U1065, Nice, France
| | - Amel Mettouchi
- Univ. Nice Sophia Antipolis, C3M, U1065, Nice, France. INSERM, C3M, U1065, Equipe Labellisée Ligue Contre le Cancer, Team Microtoxins in Host Pathogens Interactions, Nice, France
| | - Kathiane Laurent
- INSERM, C3M, U1065, Team Cellular and Molecular Physiopathology of Obesity and Diabetes, Nice, France. Univ. Nice Sophia Antipolis, C3M, U1065, Nice, France
| | - Frédéric Larbret
- University of Nice Sophia Antipolis, EA6302, Flow Cytometry Facility, Hôpital l'Archet 1, Nice, France
| | - Bernard Malavaud
- CNRS, Institut de Pharmacologie et de Biologie Structurale, Toulouse, France. Université de Toulouse, UPS, IPBS, Toulouse, France. Hôpital Rangueil, Service d'Urologie et de Transplantation Rénale, Toulouse, France
| | - Mireille Cormont
- INSERM, C3M, U1065, Team Cellular and Molecular Physiopathology of Obesity and Diabetes, Nice, France. Univ. Nice Sophia Antipolis, C3M, U1065, Nice, France
| | - Emmanuel Lemichez
- Univ. Nice Sophia Antipolis, C3M, U1065, Nice, France. INSERM, C3M, U1065, Equipe Labellisée Ligue Contre le Cancer, Team Microtoxins in Host Pathogens Interactions, Nice, France
| | - Olivier Cuvillier
- CNRS, Institut de Pharmacologie et de Biologie Structurale, Toulouse, France. Université de Toulouse, UPS, IPBS, Toulouse, France
| | - Jean François Tanti
- INSERM, C3M, U1065, Team Cellular and Molecular Physiopathology of Obesity and Diabetes, Nice, France. Univ. Nice Sophia Antipolis, C3M, U1065, Nice, France
| | - Frédéric Bost
- INSERM, C3M, U1065, Team Cellular and Molecular Physiopathology of Obesity and Diabetes, Nice, France. Univ. Nice Sophia Antipolis, C3M, U1065, Nice, France.
| |
Collapse
|
14
|
Dirat B, Ader I, Golzio M, Mettouchi A, Laurent K, Larbret F, Malavaud B, Cormont M, Lemichez E, Tanti JF, Bost F. Metformin targets the GTPase Rac1 to inhibit prostate cancer cell migration. Cancer Metab 2014. [PMCID: PMC4080087 DOI: 10.1186/2049-3002-2-s1-o24] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
15
|
Orecchia A, Mettouchi A, Uva P, Simon GC, Arcelli D, Avitabile S, Ragone G, Meneguzzi G, Pfenninger KH, Zambruno G, Failla CM. Endothelial cell adhesion to soluble vascular endothelial growth factor receptor‐1 triggers a cell dynamic and angiogenic phenotype. FASEB J 2013; 28:692-704. [DOI: 10.1096/fj.12-225771] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Angela Orecchia
- Molecular and Cell Biology LaboratoryIstituto Dermopatico dell'Immacolata (IDI)–Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS)RomeItaly
| | - Amel Mettouchi
- Institut National de la Santé et de la Recherche Médicale (INSERM) U634NiceFrance
| | - Paolo Uva
- Center for Advanced Studies, Research, and Development in Sardinia (CRS4)Bioinformatics LaboratoryCagliariItaly
| | - Glenn C. Simon
- Department of PediatricsUniversity of ColoradoAuroraColoradoUSA
| | - Diego Arcelli
- Molecular Oncology LaboratoryIstituto Dermopatico dell'Immacolata (IDI)–Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS)RomeItaly
| | - Simona Avitabile
- Molecular and Cell Biology LaboratoryIstituto Dermopatico dell'Immacolata (IDI)–Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS)RomeItaly
| | - Gianluca Ragone
- Molecular Oncology LaboratoryIstituto Dermopatico dell'Immacolata (IDI)–Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS)RomeItaly
| | - Guerrino Meneguzzi
- Institut National de la Santé et de la Recherche Médicale (INSERM) U634NiceFrance
| | | | - Giovanna Zambruno
- Molecular and Cell Biology LaboratoryIstituto Dermopatico dell'Immacolata (IDI)–Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS)RomeItaly
| | - Cristina Maria Failla
- Molecular and Cell Biology LaboratoryIstituto Dermopatico dell'Immacolata (IDI)–Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS)RomeItaly
| |
Collapse
|
16
|
Abstract
Rho GTPases undergo ubiquitylation and degradation via the ubiquitin-proteasome pathway. We now report in the November issue of Developmental Cell that the E3 ubiquitin-ligase HACE1 catalyzes the ubiquitylation of GTP-bound Rac1. Depletion of HACE1 leads to an increase of Rac1 activity. We have proposed that HACE1 limits Rac1 activity in cells, a regulation that is usurped by some pathogenic bacteria for efficient invasion of host cell monolayers. We here review these findings in parallel with the regulation of RhoA by the ubiquitin and proteasome system (UPS) and discuss the impact of these regulations on the capacity of Rho GTPases to signal.
Collapse
|
17
|
Daugaard M, Nitsch R, Razaghi B, McDonald L, Jarrar A, Torrino S, Castillo-Lluva S, Rotblat B, Li L, Malliri A, Lemichez E, Mettouchi A, Berman JN, Penninger JM, Sorensen PH. Hace1 controls ROS generation of vertebrate Rac1-dependent NADPH oxidase complexes. Nat Commun 2013; 4:2180. [PMID: 23864022 PMCID: PMC3759041 DOI: 10.1038/ncomms3180] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Accepted: 06/21/2013] [Indexed: 02/04/2023] Open
Abstract
The Hace1-HECT E3 ligase is a tumor suppressor that ubiquitylates the activated GTP-bound form of the Rho family GTPase Rac1, leading to Rac1 proteasomal degradation. Here we show that, in vertebrates, Hace1 targets Rac1 for degradation when Rac1 is localized to the nicotinamide adenine dinucleotide phosphate (NADPH) oxidase holoenzyme. This event blocks de novo reactive oxygen species generation by Rac1-dependent NADPH oxidases, and thereby confers cellular protection from reactive oxygen species-induced DNA damage and cyclin D1-driven hyper-proliferation. Genetic inactivation of Hace1 in mice or zebrafish, as well as Hace1 loss in human tumor cell lines or primary murine or human tumors, leads to chronic NADPH oxidase-dependent reactive oxygen species elevation, DNA damage responses and enhanced cyclin D1 expression. Our data reveal a conserved ubiquitin-dependent molecular mechanism that controls the activity of Rac1-dependent NADPH oxidase complexes, and thus constitutes the first known example of a tumor suppressor protein that directly regulates reactive oxygen species production in vertebrates.
Collapse
Affiliation(s)
- Mads Daugaard
- Department of Molecular Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia V5Z 1L3, Canada
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Roberto Nitsch
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Dr Bohrgasse 3, Vienna 1030 Austria
| | - Babak Razaghi
- Department of Pediatrics, Dalhousie University and IWK Health Centre, Halifax, Nova Scotia B3K 6R8, Canada
| | - Lindsay McDonald
- Department of Pediatrics, Dalhousie University and IWK Health Centre, Halifax, Nova Scotia B3K 6R8, Canada
| | - Ameer Jarrar
- Department of Pediatrics, Dalhousie University and IWK Health Centre, Halifax, Nova Scotia B3K 6R8, Canada
| | - Stéphanie Torrino
- Equipe labellisée Ligue Contre Le Cancer, U1065, Centre Méditerranéen de Médecine Moléculaire, C3M, Université de Nice-Sophia-Antipolis, 8 06204 Nice, France
| | - Sonia Castillo-Lluva
- Cell Signalling Group, Cancer Research UK Paterson Institute for Cancer Research, The University of Manchester, Manchester, M20 4BX, UK
| | - Barak Rotblat
- Department of Molecular Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia V5Z 1L3, Canada
| | - Liheng Li
- Department of Molecular Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia V5Z 1L3, Canada
| | - Angeliki Malliri
- Cell Signalling Group, Cancer Research UK Paterson Institute for Cancer Research, The University of Manchester, Manchester, M20 4BX, UK
| | - Emmanuel Lemichez
- Equipe labellisée Ligue Contre Le Cancer, U1065, Centre Méditerranéen de Médecine Moléculaire, C3M, Université de Nice-Sophia-Antipolis, 8 06204 Nice, France
| | - Amel Mettouchi
- Equipe labellisée Ligue Contre Le Cancer, U1065, Centre Méditerranéen de Médecine Moléculaire, C3M, Université de Nice-Sophia-Antipolis, 8 06204 Nice, France
| | - Jason N. Berman
- Department of Pediatrics, Dalhousie University and IWK Health Centre, Halifax, Nova Scotia B3K 6R8, Canada
| | - Josef M. Penninger
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Dr Bohrgasse 3, Vienna 1030 Austria
| | - Poul H. Sorensen
- Department of Molecular Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia V5Z 1L3, Canada
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| |
Collapse
|
18
|
Abstract
Angiogenesis requires the development of a hierarchically branched network of vessels, which undergoes radial expansion and anastomosis to form a close circuit. Branching is achieved by coordinated behavior of endothelial cells that organize into leading “tip” cells and trailing “stalk” cells. Such organization is under control of the Dll4-Notch signaling pathway, which sets a hierarchy in receptiveness of cells to VEGF-A. Recent studies have shed light on a control of the Notch pathway by basement membrane proteins and integrin signaling, disclosing that extracellular matrix exerts active control on vascular branching morphogenesis. We will survey in the present review how extracellular matrix is a multifaceted substrate, which behind a classical structural role hides a powerful conductor function to shape the branching pattern of vessels.
Collapse
Affiliation(s)
- Amel Mettouchi
- INSERM, U1065, Centre Méditerranéen de Médecine Moléculaire, C3M, Université de Nice-Sophia-Antipolis, Nice, France.
| |
Collapse
|
19
|
Botta A, Delteil F, Mettouchi A, Vieira A, Estrach S, Négroni L, Stefani C, Lemichez E, Meneguzzi G, Gagnoux-Palacios L. Confluence switch signaling regulates ECM composition and the plasmin proteolytic cascade in keratinocytes. J Cell Sci 2012; 125:4241-52. [PMID: 22641690 DOI: 10.1242/jcs.096289] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
In culture, cell confluence generates signals that commit actively growing keratinocytes to exit the cell cycle and differentiate to form a stratified epithelium. Using a comparative proteomic approach, we studied this 'confluence switch' and identified a new pathway triggered by cell confluence that regulates basement membrane (BM) protein composition by suppressing the uPA-uPAR-plasmin pathway. Indeed, confluence triggers adherens junction maturation and enhances TGF-β and activin A activity, resulting in increased deposition of PAI-1 and perlecan in the BM. Extracellular matrix (ECM)-accumulated PAI-1 suppresses the uPA-uPAR-plasmin pathway and further enhances perlecan deposition by inhibiting its plasmin-dependent proteolysis. We show that perlecan deposition in the ECM strengthens cell adhesion, inhibits keratinocyte motility and promotes additional accumulation of PAI-1 in the ECM at confluence. In agreement, during wound-healing, perlecan concentrates at the wound-margin, where BM matures to stabilize keratinocyte adhesion. Our results demonstrate that confluence-dependent signaling orchestrates not only growth inhibition and differentiation, but also controls ECM proteolysis and BM formation. These data suggest that uncontrolled integration of confluence-dependent signaling, might favor skin disorders, including tumorigenesis, not only by promoting cell hyperproliferation, but also by altering protease activity and deposition of ECM components.
Collapse
|
20
|
Affiliation(s)
- Gérard Gacon
- Institut Cochin, Département de Génétique et Développement, Inserm U1016, CNRS UMR8104, Université Paris Descartes, 24, rue du Faubourg Saint Jacques, 75014 Paris, France.
| | | | | |
Collapse
|
21
|
Abstract
Rho GTPases including RhoA, Cdc42, and Rac1 are master regulators of cell cytoskeleton dynamic, thus controlling essential cellular processes notably cell polarity, migration and cytokinesis. These GTPases undergo a spatiotemporal regulation primarily controlled by cellular factors inducing both the exchange of GDP for GTP and the hydrolysis of GTP into GDP. Recent findings have unveiled another layer of complexity in the regulation of Rho proteins consisting in their ubiquitylation followed by their proteasomal degradation. Here, we describe how to assess the level of ubiquitylation of Rho proteins in cells, taking Rac1 as an example.
Collapse
Affiliation(s)
- Anne Doye
- Faculté de Médecine, INSERM, U895, Centre Méditerranéen de Médecine Moléculaire, C3M, Institut Signalisation et Pathologie, IFR50, Université de Nice-Sophia-Antipolis, Nice, France
| | | | | |
Collapse
|
22
|
Torrino S, Visvikis O, Doye A, Boyer L, Stefani C, Munro P, Bertoglio J, Gacon G, Mettouchi A, Lemichez E. The E3 Ubiquitin-Ligase HACE1 Catalyzes the Ubiquitylation of Active Rac1. Dev Cell 2011; 21:959-65. [DOI: 10.1016/j.devcel.2011.08.015] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Revised: 05/20/2011] [Accepted: 08/19/2011] [Indexed: 01/09/2023]
|
23
|
Stenzel D, Franco CA, Estrach S, Mettouchi A, Sauvaget D, Rosewell I, Schertel A, Armer H, Domogatskaya A, Rodin S, Tryggvason K, Collinson L, Sorokin L, Gerhardt H. Endothelial basement membrane limits tip cell formation by inducing Dll4/Notch signalling in vivo. EMBO Rep 2011; 12:1135-43. [PMID: 21979816 DOI: 10.1038/embor.2011.194] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 09/09/2011] [Accepted: 09/09/2011] [Indexed: 01/12/2023] Open
Abstract
How individual components of the vascular basement membrane influence endothelial cell behaviour remains unclear. Here we show that laminin α4 (Lama4) regulates tip cell numbers and vascular density by inducing endothelial Dll4/Notch signalling in vivo. Lama4 deficiency leads to reduced Dll4 expression, excessive filopodia and tip cell formation in the mouse retina, phenocopying the effects of Dll4/Notch inhibition. Lama4-mediated Dll4 expression requires a combination of integrins in vitro and integrin β1 in vivo. We conclude that appropriate laminin/integrin-induced signalling is necessary to induce physiologically functional levels of Dll4 expression and regulate branching frequency during sprouting angiogenesis in vivo.
Collapse
Affiliation(s)
- Denise Stenzel
- Vascular Biology Laboratory, London Research Institute - Cancer Research UK, 44 Lincoln's Inn Fields, London WC2A 3LY, UK
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Estrach S, Cailleteau L, Franco CA, Gerhardt H, Stefani C, Lemichez E, Gagnoux-Palacios L, Meneguzzi G, Mettouchi A. Laminin-binding integrins induce Dll4 expression and Notch signaling in endothelial cells. Circ Res 2011; 109:172-82. [PMID: 21474814 DOI: 10.1161/circresaha.111.240622] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
RATIONALE Integrins play a crucial role in controlling endothelial cell proliferation and migration during angiogenesis. The Delta-like 4 (Dll4)/Notch pathway establishes an adequate ratio between stalk and tip cell populations by restricting tip cell formation through "lateral inhibition" in response to a vascular endothelial growth factor gradient. Because angiogenesis requires a tight coordination of these cellular processes, we hypothesized that adhesion, vascular endothelial growth factor, and Notch signaling pathways are interconnected. OBJECTIVE This study was aimed at characterizing the cross-talk between integrin and Notch signaling in endothelial cells. METHODS AND RESULTS Adhesion of primary human endothelial cells to laminin-111 triggers Dll4 expression, leading to subsequent Notch pathway activation. SiRNA-mediated knockdown of α2β1 and α6β1 integrins abolishes Dll4 induction, which discloses a selective integrin signaling acting upstream of Notch pathway. The increase in Foxc2 transcription, triggered by α2β1 binding to laminin, is required but not sufficient per se for Dll4 expression. Furthermore, vascular endothelial growth factor stimulates laminin γ1 deposition, which leads to integrin signaling and Dll4 induction. Interestingly, loss of integrins α2 or α6 mimics the effects of Dll4 silencing and induces excessive network branching in an in vitro sprouting angiogenesis assay on three-dimensional matrigel. CONCLUSIONS We show that, in endothelial cells, ligation of α2β1 and α6β1 integrins induces the Notch pathway, and we disclose a novel role of basement membrane proteins in the processes controlling tip vs stalk cell selection.
Collapse
|
25
|
Visvikis O, Boyer L, Torrino S, Doye A, Lemonnier M, Lorès P, Rolando M, Flatau G, Mettouchi A, Bouvard D, Veiga E, Gacon G, Cossart P, Lemichez E. Escherichia coli Producing CNF1 Toxin Hijacks Tollip to Trigger Rac1-Dependent Cell Invasion. Traffic 2011; 12:579-90. [DOI: 10.1111/j.1600-0854.2011.01174.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
26
|
Cailleteau L, Estrach S, Thyss R, Boyer L, Doye A, Domange B, Johnsson N, Rubinstein E, Boucheix C, Ebrahimian T, Silvestre JS, Lemichez E, Meneguzzi G, Mettouchi A. alpha2beta1 integrin controls association of Rac with the membrane and triggers quiescence of endothelial cells. J Cell Sci 2010; 123:2491-501. [PMID: 20592186 DOI: 10.1242/jcs.058875] [Citation(s) in RCA: 24] [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] [Indexed: 11/20/2022] Open
Abstract
Integrin receptors and their extracellular matrix ligands provide cues to cell proliferation, survival, differentiation and migration. Here, we show that alpha2beta1 integrin, when ligated to the basement membrane component laminin-1, triggers a proliferation arrest in primary endothelial cells. Indeed, in the presence of strong growth signals supplied by growth factors and fibronectin, alpha2beta1 engagement alters assembly of mature focal adhesions by alpha5beta1 and leads to impairment of downstream signaling and cell-cycle arrest in the G1 phase. Although the capacity of alpha5beta1 to signal for GTP loading of Rac is preserved, the joint engagement of alpha2beta1 interferes with membrane anchorage of Rac. Adapting the 'split-ubiquitin' sensor to screen for membrane-proximal alpha2 integrin partners, we identified the CD9 tetraspanin and further establish its requirement for destabilization of focal adhesions, control of Rac subcellular localization and growth arrest induced by alpha2beta1 integrin. Altogether, our data establish that alpha2beta1 integrin controls endothelial cell commitment towards quiescence by triggering a CD9-dependent dominant signaling.
Collapse
Affiliation(s)
- Laurence Cailleteau
- INSERM, U634, Faculté de Médecine, 27 Avenue de Valombrose, Nice, F-06107, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Rolando M, Stefani C, Flatau G, Auberger P, Mettouchi A, Mhlanga M, Rapp U, Galmiche A, Lemichez E. Transcriptome dysregulation by anthrax lethal toxin plays a key role in induction of human endothelial cell cytotoxicity. Cell Microbiol 2010; 12:891-905. [PMID: 20088950 DOI: 10.1111/j.1462-5822.2010.01438.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We have investigated how Bacillus anthracis lethal toxin (LT) triggers caspase-3 activation and the formation of thick actin cables in human endothelial cells. By DNA array analysis we show that LT has a major impact on the cell transcriptome and we identify key host genes involved in LT cytotoxic effects. Indeed, upregulation of TRAIL and downregulation of XIAP both participate in LT-induced caspase-3 activation. LT induces a downregulation of the immediate early gene and master regulator of transcription egr1. Importantly, its re-expression in LT-intoxicated cells blocks caspase-3 activation. In parallel, we found that the formation of actin cables induced by LT occurs in the absence of direct activation of RhoA/ROCK signalling. We show that knock-down of cortactin and rhophilin-2 under conditions of calponin-1 expression defines the minimal set of genes regulated by LT for actin cable formation. Together our data establish that the modulation of the cell transcriptome by LT plays a key role in triggering human endothelial cell toxicity.
Collapse
Affiliation(s)
- Monica Rolando
- INSERM, U895, Centre Méditerranéen de Médecine Moléculaire, C3M, Nice, 06204 Cedex 3, France
| | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Boyer L, Doye A, Rolando M, Flatau G, Munro P, Gounon P, Clément R, Pulcini C, Popoff MR, Mettouchi A, Landraud L, Dussurget O, Lemichez E. Induction of transient macroapertures in endothelial cells through RhoA inhibition by Staphylococcus aureus factors. ACTA ACUST UNITED AC 2006; 173:809-19. [PMID: 16754962 PMCID: PMC2063895 DOI: 10.1083/jcb.200509009] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [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] [Indexed: 12/18/2022]
Abstract
The GTPase RhoA is a major regulator of the assembly of actin stress fibers and the contractility of the actomyosin cytoskeleton. The epidermal cell differentiation inhibitor (EDIN) and EDIN-like ADP-ribosyltransferases of Staphylococcus aureus catalyze the inactivation of RhoA, producing actin cable disruption. We report that purified recombinant EDIN and EDIN-producing S. aureus provoke large transcellular tunnels in endothelial cells that we have named macroapertures (MAs). These structures open transiently, followed by the appearance of actin-containing membrane waves extending over the aperture. Disruption of actin cables, either directly or indirectly, through rhoA RNAi knockdown also triggers the formation of MAs. Intoxication of endothelial monolayers by EDIN produces a loss of barrier function and provides direct access of the endothelium basement membrane to S. aureus.
Collapse
Affiliation(s)
- Laurent Boyer
- Toxines Bactériennes dans la Relation Hôte-Pathogènes, U627, Faculté de Médecine, Institut National de la Santé et de la Recherche Médicale, INSERM, 06107 Nice Cedex 2, France
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Boyer L, Doye A, Rolando M, Flatau G, Munro P, Gounon P, Clément R, Pulcini C, Popoff MR, Mettouchi A, Landraud L, Dussurget O, Lemichez E. Induction of transient macroapertures in endothelial cells through RhoA inhibition by Staphylococcus aureus factors. J Exp Med 2006. [DOI: 10.1084/jem2036oia17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
30
|
Abstract
Integrins are transmembrane receptors which bind extracellular matrix proteins and enable not only cell adhesion and cytoskeleton organization but also transduction of critical signals into the cells to promote survival, proliferation, differentiation, or migration programs. Integrins participate in many aspects of vascular biology. The past few years have experienced a sustained interest in the implication of integrin receptors in tumor angiogenesis. We will focus our review on studies giving concrete evidence to a role of the beta1 class of integrins in angiogenesis, and we will provide an overview of the molecular mechanisms involved in their action.
Collapse
Affiliation(s)
- Amel Mettouchi
- INSERM U634, Faculté de médecine, 27 Av. de Valombrose, F-06107 Nice Cedex, France.
| | | |
Collapse
|
31
|
Abstract
The CNF1 toxin is produced by uropathogenic and meningitis-causing Escherichia coli. CNF1 catalyzes the constitutive activation of Rho proteins by deamidation. The threshold of activation of Rho proteins by CNF1 is, however, attenuated because of a concomitant decrease of their cellular levels. Depletion of activated-Rac1 is catalyzed by ubiquitin-mediated proteasomal degradation. Consequently, we show by effector-binding pull-down that co-treatment of intoxicated cells with the MG132 proteasome-inhibitor results in a higher level of activation of Rac, as well as RhoA and Cdc42. We show that CNF1 induces the transient recruitment of Rho proteins to cellular membranes. Interestingly, at the difference of Rac and Cdc42, the inhibition of the proteasome during CNF1 treatment does not result in a significant accumulation of RhoA to cellular membranes. Using an in vivo ubiquitylation assay, we evidence that mutation of the geranylgeranyl acceptor cysteine of Rac1 (Rac1C189G) abolished the sensitivity of permanently activated-Rac1 to ubiquitylation, whereas Rac1C189G remained able to bind to the effector-binding domain of p21-PAK. Collectively, these results indicate that association with the cellular membranes is a necessary step for activated-Rac1 ubiquitylation.
Collapse
Affiliation(s)
- Anne Doye
- INSERM, Faculte de Medecine Nice, France
| | | | | | | |
Collapse
|
32
|
Doye A, Mettouchi A, Bossis G, Clément R, Buisson-Touati C, Flatau G, Gagnoux L, Piechaczyk M, Boquet P, Lemichez E. CNF1 exploits the ubiquitin-proteasome machinery to restrict Rho GTPase activation for bacterial host cell invasion. Cell 2002; 111:553-64. [PMID: 12437928 DOI: 10.1016/s0092-8674(02)01132-7] [Citation(s) in RCA: 234] [Impact Index Per Article: 10.6] [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: 10/26/2022]
Abstract
CNF1 toxin is a virulence factor produced by uropathogenic Escherichia coli. Upon cell binding and introduction into the cytosol, CNF1 deamidates glutamine 63 of RhoA (or 61 of Rac and Cdc42), rendering constitutively active these GTPases. Unexpectedly, we measured in bladder cells a transient CNF1-induced activation of Rho GTPases, maximal for Rac. Deactivation of Rac correlated with the increased susceptibility of its deamidated form to ubiquitin/proteasome-mediated degradation. Sensitivity to ubiquitylation could be generalized to other permanent-activated forms of Rac and to its sustained activation by Dbl. Degradation of the toxin-activated Rac allowed both host cell motility and efficient cell invasion by uropathogenic bacteria. CNF1 toxicity thus results from a restricted activation of Rho GTPases through hijacking the host cell proteasomal machinery.
Collapse
Affiliation(s)
- Anne Doye
- INSERM U452, IFR 50, Faculté de Médecine, 28 avenue de Valombrose, 06107, Nice, France
| | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Abstract
Plant water homeostasis is maintained by the phytohormone abscisic acid (ABA), which triggers stomatal pore closure in response to drought stress. We identified the Arabidopsis small guanosine triphosphatase (GTPase) protein AtRac1 as a central component in the ABA-mediated stomatal closure process. ABA treatment induced inactivation of AtRac GTPases and disruption of the guard cell actin cytoskeleton. In contrast, in the ABA-insensitive mutant abi1-1, which is impaired in stomatal closure, neither AtRac inactivation nor actin cytoskeleton disruption was observed on ABA treatment. These observations indicate that AtRac1 inactivation is a limiting step in the ABA-signaling cascade leading to stomatal closure. Consistent with these findings, expression of a dominant-positive mutant of AtRac1 blocked the ABA-mediated effects on actin cytoskeleton and stomatal closure in wild-type plants, whereas expression of a dominant-negative AtRac1 mutant recapitulated the ABA effects in the absence of the hormone. Moreover, the dominant-negative form of AtRac1 could also restore stomatal closure in abi1-1. These results define AtRac1 as a central element for plant adaptation to drought.
Collapse
Affiliation(s)
- E Lemichez
- Laboratory of Plant Molecular Biology, Rockefeller University, New York, New York 10021-6399, USA
| | | | | | | | | | | |
Collapse
|
34
|
Mettouchi A, Klein S, Guo W, Lopez-Lago M, Lemichez E, Westwick JK, Giancotti FG. Integrin-specific activation of Rac controls progression through the G(1) phase of the cell cycle. Mol Cell 2001; 8:115-27. [PMID: 11511365 DOI: 10.1016/s1097-2765(01)00285-4] [Citation(s) in RCA: 236] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Adhesion to fibronectin through the alpha5beta1 integrin enables endothelial cells to proliferate in response to growth factors, whereas adhesion to laminin through alpha2beta1 results in growth arrest under the same conditions. On laminin, endothelial cells fail to translate Cyclin D1 mRNA and activate CDK4 and CDK6. Activated Rac, but not MEK1, PI-3K, or Akt, rescues biosynthesis of cyclin D1 and progression through the G(1) phase. Conversely, dominant negative Rac prevents these events on fibronectin. Mitogens promote activation of Rac on fibronectin but not laminin. This process is mediated by SOS and PI-3K and requires coordinate upstream signals through Shc and FAK. These results indicate that Rac is a crucial mediator of the integrin-specific control of cell cycle in endothelial cells.
Collapse
MESH Headings
- Adaptor Proteins, Signal Transducing
- Adaptor Proteins, Vesicular Transport
- Blotting, Northern
- CDC2-CDC28 Kinases
- Caveolin 1
- Caveolins/metabolism
- Cell Adhesion
- Cells, Cultured
- Culture Media, Serum-Free
- Cyclin D1/genetics
- Cyclin D1/metabolism
- Cyclin-Dependent Kinase 2
- Cyclin-Dependent Kinase 4
- Cyclin-Dependent Kinase 6
- Cyclin-Dependent Kinases/metabolism
- Endothelium, Vascular/cytology
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/physiology
- Epidermal Growth Factor/pharmacology
- Fibroblast Growth Factor 2/pharmacology
- Fibronectins/metabolism
- Focal Adhesion Kinase 1
- Focal Adhesion Protein-Tyrosine Kinases
- Focal Adhesions/metabolism
- G1 Phase/physiology
- Humans
- Immunoblotting
- Insulin/pharmacology
- Integrins/genetics
- Integrins/metabolism
- Laminin/metabolism
- MAP Kinase Signaling System/physiology
- Microscopy, Fluorescence
- Mitogen-Activated Protein Kinases/metabolism
- Phosphatidylinositol 3-Kinases/metabolism
- Protein Serine-Threonine Kinases/metabolism
- Protein-Tyrosine Kinases/metabolism
- Proteins/metabolism
- Proto-Oncogene Proteins
- Receptors, Collagen
- Receptors, Fibronectin/genetics
- Receptors, Fibronectin/metabolism
- Recombinant Fusion Proteins/genetics
- Recombinant Fusion Proteins/metabolism
- SOS1 Protein/metabolism
- Shc Signaling Adaptor Proteins
- Src Homology 2 Domain-Containing, Transforming Protein 1
- rac GTP-Binding Proteins/metabolism
Collapse
Affiliation(s)
- A Mettouchi
- Cellular Biochemistry and Biophysics Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
| | | | | | | | | | | | | |
Collapse
|
35
|
Dejong V, Degeorges A, Filleur S, Ait-Si-Ali S, Mettouchi A, Bornstein P, Binétruy B, Cabon F. The Wilms' tumor gene product represses the transcription of thrombospondin 1 in response to overexpression of c-Jun. Oncogene 1999; 18:3143-51. [PMID: 10340386 DOI: 10.1038/sj.onc.1202654] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Thrombospondin 1 (TSP1) is known for its significant anti-angiogenic properties. In a previous study, we have shown that transient or stable overexpression of the transcription factor c-Jun, in rat fibroblasts, leads to repression of TSP1. We now demonstrate that the c-Jun-induced repression of TSP1 does not occur directly and does not require binding of c-Jun to the TSP1 promoter. Instead, repression involves a factor secreted by c-Jun-overexpressing cells. This secreted factor triggers a signal transduction pathway from the membrane to the nucleus, and these signals lead to the binding of the product of the Wilms' tumor suppressor gene, WT1, to the -210 region of the TSP1 promoter. This region binds WT1 and SP1, but not EGR1, although its sequence fits the consensus binding site for this transcription factor. WT1 overexpression in transfected cells inhibits endogenous TSP1 gene expression and TSP1 transcription in experiments using TSP1 promoter-reporter constructs. The WT1 - KTS isoform is more active in repressing TSP1 transcription than WT1 + KTS, while EGR1 is inactive. Enhancement of WT1 binding to DNA in response to c-Jun does not require de novo protein synthesis. The above mechanism for TSP1 repression could apply to other genes, thus coordinating their regulation in the vicinity of a c-Jun-overexpressing cell. We conclude that WT1, which was discovered as a result of its tumor suppressor properties, may also possess oncogenic characteristics in the c-Jun transformation process, and thus repress the anti-angiogenic protein, TSP1.
Collapse
Affiliation(s)
- V Dejong
- CNRS UPR9079, Oncogénèse, Différenciation et Transduction du Signal, Villejuif, France
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Mettouchi A, Cabon F, Montreau N, Dejong V, Vernier P, Gherzi R, Mercier G, Binétruy B. The c-Jun-induced transformation process involves complex regulation of tenascin-C expression. Mol Cell Biol 1997; 17:3202-9. [PMID: 9154819 PMCID: PMC232173 DOI: 10.1128/mcb.17.6.3202] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
In cooperation with an activated ras oncogene, the site-dependent AP-1 transcription factor c-Jun transforms primary rat embryo fibroblasts (REF). Although signal transduction pathways leading to activation of c-Jun proteins have been extensively studied, little is known about c-Jun cellular targets. We identified c-Jun-upregulated cDNA clones homologous to the tenascin-C gene by differential screening of a cDNA library from REF. This tightly regulated gene encodes a rare extracellular matrix protein involved in cell attachment and migration and in the control of cell growth. Transient overexpression of c-Jun induced tenascin-C expression in primary REF and in FR3T3, an established fibroblast cell line. Surprisingly, tenascin-C synthesis was repressed after stable transformation by c-Jun compared to that in the nontransformed parental cells. As assessed by using the tenascin-C (-220 to +79) promoter fragment cloned in a reporter construct, the c-Jun-induced transient activation is mediated by two binding sites: one GCN4/AP-1-like site, at position -146, and one NF-kappaB site, at position -210. Furthermore, as demonstrated by gel shift experiments and cotransfections of the reporter plasmid and expression vectors encoding the p65 subunit of NF-kappaB and c-Jun, the two transcription factors bind and synergistically transactivate the tenascin-C promoter. We previously described two other extracellular matrix proteins, SPARC and thrombospondin-1, as c-Jun targets. Thus, our results strongly suggest that the regulation of the extracellular matrix composition plays a central role in c-Jun-induced transformation.
Collapse
Affiliation(s)
- A Mettouchi
- Institut de Recherche sur le Cancer, CNRS UPR9079, Villejuif, France
| | | | | | | | | | | | | | | |
Collapse
|
37
|
Desbiez C, David C, Mettouchi A, Laufs J, Gronenborn B. Rep protein of tomato yellow leaf curl geminivirus has an ATPase activity required for viral DNA replication. Proc Natl Acad Sci U S A 1995; 92:5640-4. [PMID: 7777563 PMCID: PMC41752 DOI: 10.1073/pnas.92.12.5640] [Citation(s) in RCA: 76] [Impact Index Per Article: 2.6] [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: 01/27/2023] Open
Abstract
The Rep protein of geminiviruses is the sole viral protein required for their DNA replication. The amino acid sequence of Rep protein contains an NTP binding consensus motif (P-loop). Here we show that purified Rep protein of tomato yellow leaf curl virus expressed in Escherichia coli exhibits an ATPase activity in vitro. Amino acid exchanges in the P-loop sequence of Rep causes a substantial decrease or loss of the ATPase activity. In vivo, mutant viruses carrying these Rep mutations do not replicate in plant cells. These results show that ATP binding by the Rep protein of geminiviruses is required for its function in viral DNA replication.
Collapse
Affiliation(s)
- C Desbiez
- Institut des Sciences Végétales, Centre National de la Recherche Scientifique, Yvette, France
| | | | | | | | | |
Collapse
|
38
|
Mettouchi A, Cabon F, Montreau N, Vernier P, Mercier G, Blangy D, Tricoire H, Vigier P, Binétruy B. SPARC and thrombospondin genes are repressed by the c-jun oncogene in rat embryo fibroblasts. EMBO J 1994; 13:5668-78. [PMID: 7988564 PMCID: PMC395532 DOI: 10.1002/j.1460-2075.1994.tb06905.x] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.5] [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: 11/07/2022] Open
Abstract
The sequence-specific transcription factor c-Jun displays oncogenic potential in mammalian cells either in cooperation with activated Ras in primary embryonic fibroblasts or alone in established cell lines. Although pathways for signal transduction leading to activation of c-Jun proteins have been extensively studied, little is known about the events downstream of c-Jun stimulation. We isolated cellular genes that are targets of c-Jun by differential screening of a cDNA library from primary rat embryo fibroblasts. Two transcripts with sequences similar to known genes were repressed following transitory expression of a c-Jun-encoding vector. They correspond to the SPARC and thrombospondin 1 (TS1) genes, encoding extracellular matrix proteins. These genes are tightly regulated during embryogenesis and in adult tissues and are involved in the control of cell growth. c-Jun transitory repression of these two genes was demonstrated both in primary cells and in FR3T3, an established fibroblast cell line. The repression was also detected in FR3T3 derivatives stably transformed by c-Jun or Ras. Although c-Jun regulation of the TS1 gene was found at the promoter level, preliminary results strongly suggest that repression of SPARC and TS1 gene expression are mediated by a secreted factor. In contrast, expression of these genes was unaffected by transformation with oncogenes from DNA viruses. Our results identify new, specific, probably indirect c-Jun target genes and suggest previously unsuspected regulatory roles for SPARC and thrombospondin in the control of cell growth.
Collapse
Affiliation(s)
- A Mettouchi
- IRSC, CNRS, UPR272, Laboratoire Virus et Differenciation, BP 8, Villejuif, France
| | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Coffer P, de Jonge M, Mettouchi A, Binetruy B, Ghysdael J, Kruijer W. junB promoter regulation: Ras mediated transactivation by c-Ets-1 and c-Ets-2. Oncogene 1994; 9:911-21. [PMID: 8108135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The Jun gene family encode components of the AP-1 transcription factor complex that regulate a variety of TRE-containing target promoters. Expression of family members is induced by a wide variety of extracellular stimuli and thought to be important in mediating cellular proliferation and differentiation. We have localized cis-acting DNA sequences in the murine junB promoter capable of mediating transcriptional activation by the proto-oncogene products c-Ets-1 and c-Ets-2. We show by promoter deletion analysis that multiple elements located between -848 and -574, and between -196 and -91 can mediate transactivation by ETS-family members in different cell types. In vitro DNA binding assays indicate that the elements identified can specifically interact with c-Ets-1 protein. Furthermore, we show that ETS-transactivation of a variety of reporter constructs is dramatically enhanced by introduction of oncogenic Ha-ras. The activation of Ras by extracellular stimuli invokes a phosphorylation cascade that includes the downstream mitogen-activated protein (MAP) kinase p44ERK-1. We further show that addition of activated p44ERK-1 MAP kinase can also enhance ETS-transactivation of junB promoter reporter constructs. Here we propose that ETS-family members play a role in the activation of junB transcription by a Ras-stimulated signal transducing pathway that includes MAP kinase(s).
Collapse
Affiliation(s)
- P Coffer
- Hubrecht Laboratorium, Utrecht, The Netherlands
| | | | | | | | | | | |
Collapse
|