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Nedara K, Reinhardt C, Lebraud E, Arena G, Gracia C, Buard V, Pioche-Durieu C, Castelli F, Colsch B, Bénit P, Rustin P, Albaud B, Gestraud P, Baulande S, Servant N, Deutsch E, Verbavatz JM, Brenner C, Milliat F, Modjtahedi N. Relevance of the TRIAP1/p53 axis in colon cancer cell proliferation and adaptation to glutamine deprivation. Front Oncol 2022; 12:958155. [DOI: 10.3389/fonc.2022.958155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 10/10/2022] [Indexed: 11/13/2022] Open
Abstract
Human TRIAP1 (TP53-regulated inhibitor of apoptosis 1; also known as p53CSV for p53-inducible cell survival factor) is the homolog of yeast Mdm35, a well-known chaperone that interacts with the Ups/PRELI family proteins and participates in the intramitochondrial transfer of lipids for the synthesis of cardiolipin (CL) and phosphatidylethanolamine. Although recent reports indicate that TRIAP1 is a prosurvival factor abnormally overexpressed in various types of cancer, knowledge about its molecular and metabolic function in human cells is still elusive. It is therefore critical to understand the metabolic and proliferative advantages that TRIAP1 expression provides to cancer cells. Here, in a colorectal cancer cell model, we report that the expression of TRIAP1 supports cancer cell proliferation and tumorigenesis. Depletion of TRIAP1 perturbed the mitochondrial ultrastructure, without a major impact on CL levels and mitochondrial activity. TRIAP1 depletion caused extramitochondrial perturbations resulting in changes in the endoplasmic reticulum-dependent lipid homeostasis and induction of a p53-mediated stress response. Furthermore, we observed that TRIAP1 depletion conferred a robust p53-mediated resistance to the metabolic stress caused by glutamine deprivation. These findings highlight the importance of TRIAP1 in tumorigenesis and indicate that the loss of TRIAP1 has extramitochondrial consequences that could impact on the metabolic plasticity of cancer cells and their response to conditions of nutrient deprivation.
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2
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Arena G, Modjtahedi N, Kruger R. Exploring the contribution of the mitochondrial disulfide relay system to Parkinson's disease: the PINK1/CHCHD4 interplay. Neural Regen Res 2021; 16:2222-2224. [PMID: 33818502 PMCID: PMC8354137 DOI: 10.4103/1673-5374.310679] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- Giuseppe Arena
- Translational Neuroscience group, Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Nazanine Modjtahedi
- Université Paris-Saclay, Gustave Roussy Institute, CNRS, Metabolic and systemic aspects of oncogenesis for new therapeutic approaches, Villejuif, France
| | - Rejko Kruger
- Translational Neuroscience group, Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg; Parkinson Research Clinic, Centre Hospitalier du Luxembourg (CHL); Transversal Translational Medicine, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg
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3
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Rao S, Mondragón L, Pranjic B, Hanada T, Stoll G, Köcher T, Zhang P, Jais A, Lercher A, Bergthaler A, Schramek D, Haigh K, Sica V, Leduc M, Modjtahedi N, Pai TP, Onji M, Uribesalgo I, Hanada R, Kozieradzki I, Koglgruber R, Cronin SJ, She Z, Quehenberger F, Popper H, Kenner L, Haigh JJ, Kepp O, Rak M, Cai K, Kroemer G, Penninger JM. AIF-regulated oxidative phosphorylation supports lung cancer development. Cell Res 2019; 29:579-591. [PMID: 31133695 PMCID: PMC6796841 DOI: 10.1038/s41422-019-0181-4] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 05/05/2019] [Indexed: 12/30/2022] Open
Abstract
Cancer is a major and still increasing cause of death in humans. Most cancer cells have a fundamentally different metabolic profile from that of normal tissue. This shift away from mitochondrial ATP synthesis via oxidative phosphorylation towards a high rate of glycolysis, termed Warburg effect, has long been recognized as a paradigmatic hallmark of cancer, supporting the increased biosynthetic demands of tumor cells. Here we show that deletion of apoptosis-inducing factor (AIF) in a KrasG12D-driven mouse lung cancer model resulted in a marked survival advantage, with delayed tumor onset and decreased malignant progression. Mechanistically, Aif deletion leads to oxidative phosphorylation (OXPHOS) deficiency and a switch in cellular metabolism towards glycolysis in non-transformed pneumocytes and at early stages of tumor development. Paradoxically, although Aif-deficient cells exhibited a metabolic Warburg profile, this bioenergetic change resulted in a growth disadvantage of KrasG12D-driven as well as Kras wild-type lung cancer cells. Cell-autonomous re-expression of both wild-type and mutant AIF (displaying an intact mitochondrial, but abrogated apoptotic function) in Aif-knockout KrasG12D mice restored OXPHOS and reduced animal survival to the same level as AIF wild-type mice. In patients with non-small cell lung cancer, high AIF expression was associated with poor prognosis. These data show that AIF-regulated mitochondrial respiration and OXPHOS drive the progression of lung cancer.
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Affiliation(s)
- Shuan Rao
- Department of Thoracic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, 1030, Vienna, Austria
| | - Laura Mondragón
- Equipe 11 labellisée Ligue contre le Cancer, Centre de Recherche des Cordeliers, 75006, Paris, France
- INSERM, U1138, 75006, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
- Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, 94805, Villejuif, France
| | - Blanka Pranjic
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, 1030, Vienna, Austria
| | - Toshikatsu Hanada
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, 1030, Vienna, Austria
| | - Gautier Stoll
- Equipe 11 labellisée Ligue contre le Cancer, Centre de Recherche des Cordeliers, 75006, Paris, France
- INSERM, U1138, 75006, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
- Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, 94805, Villejuif, France
- Université Sorbonne, 75006, Paris, France
| | - Thomas Köcher
- Vienna Biocenter Core Facilities, 1030, Vienna, Austria
| | - Peng Zhang
- Medical Science Research Center, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Alexander Jais
- Department of Neuronal Control of Metabolism, Max Planck Institute for Metabolism Research, Cologne, Germany
| | - Alexander Lercher
- Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Andreas Bergthaler
- Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Daniel Schramek
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, 600 University Avenue, Toronto, Canada
| | - Katharina Haigh
- Vascular Cell Biology Unit, Department for Molecular Biomedical Research, VIB, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
- Department of Pharmacology and Therapeutics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Canada
| | - Valentina Sica
- Equipe 11 labellisée Ligue contre le Cancer, Centre de Recherche des Cordeliers, 75006, Paris, France
- INSERM, U1138, 75006, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
- Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, 94805, Villejuif, France
| | - Marion Leduc
- Equipe 11 labellisée Ligue contre le Cancer, Centre de Recherche des Cordeliers, 75006, Paris, France
- INSERM, U1138, 75006, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
- Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, 94805, Villejuif, France
| | - Nazanine Modjtahedi
- Gustave Roussy Cancer Campus, Villejuif, France
- Faculty of Medicine, Université Paris-Saclay, Kremlin-Bicêtre, France
- INSERM, U1030, Villejuif, France
| | - Tsung-Pin Pai
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, 1030, Vienna, Austria
| | - Masahiro Onji
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, 1030, Vienna, Austria
| | - Iris Uribesalgo
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, 1030, Vienna, Austria
| | - Reiko Hanada
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, 1030, Vienna, Austria
| | - Ivona Kozieradzki
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, 1030, Vienna, Austria
| | - Rubina Koglgruber
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, 1030, Vienna, Austria
| | - Shane J Cronin
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, 1030, Vienna, Austria
| | - Zhigang She
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Franz Quehenberger
- Institute for Medical Informatics, Statistics and Documentation, Medical University Graz, Graz, Austria
| | - Helmut Popper
- Center for Diagnostics and Research in Molecular Biomedicine, Pathology Institute for Diagnostics and Research, Medical University Graz, Graz, Austria
| | - Lukas Kenner
- Department of Experimental Pathology and Pathology of Laboratory Animals, Medical University Vienna and University of Veterinary Medicine Vienna, Vienna, Austria
- Ludwig Boltzmann Institute for Cancer Research (LBI-CR), Vienna, Austria
| | - Jody J Haigh
- Vascular Cell Biology Unit, Department for Molecular Biomedical Research, VIB, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
- Department of Pharmacology and Therapeutics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Canada
| | - Oliver Kepp
- Equipe 11 labellisée Ligue contre le Cancer, Centre de Recherche des Cordeliers, 75006, Paris, France
- INSERM, U1138, 75006, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
- Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, 94805, Villejuif, France
| | - Malgorzata Rak
- INSERM, UMR1141, Hopital Robert Debre 48 Boulevard Serurier, 75019, Paris, France
| | - Kaican Cai
- Department of Thoracic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Guido Kroemer
- Equipe 11 labellisée Ligue contre le Cancer, Centre de Recherche des Cordeliers, 75006, Paris, France.
- INSERM, U1138, 75006, Paris, France.
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France.
- Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, 94805, Villejuif, France.
- Pôle de Biologie, Hôpital Européen Georges Pompidou, AP-HP, Paris, France.
- Suzhou Institute for Systems Biology, Chinese Academy of Sciences, Suzhou, Jiangsu, China.
- Department of Women's and Children's Health, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden.
| | - Josef M Penninger
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, 1030, Vienna, Austria.
- Department of Medical Genetics, Life Sciences Institute, University of British Columbia, Vancouver, Canada.
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Rodriguez J, Zhang Y, Li T, Xie C, Sun Y, Xu Y, Zhou K, Huo K, Wang Y, Wang X, Andersson D, Ståhlberg A, Xing Q, Mallard C, Hagberg H, Modjtahedi N, Kroemer G, Blomgren K, Zhu C. Lack of the brain-specific isoform of apoptosis-inducing factor aggravates cerebral damage in a model of neonatal hypoxia-ischemia. Cell Death Dis 2018; 10:3. [PMID: 30584234 PMCID: PMC6315035 DOI: 10.1038/s41419-018-1250-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 10/15/2018] [Accepted: 12/03/2018] [Indexed: 12/22/2022]
Abstract
Apoptosis-inducing factor (AIF) may contribute to neuronal cell death, and its influence is particularly prominent in the immature brain after hypoxia-ischemia (HI). A brain-specific AIF splice-isoform (AIF2) has recently been discovered, but has not yet been characterized at the genetic level. The aim of this study was to determine the functional and regulatory profile of AIF2 under physiological conditions and after HI in mice. We generated AIF2 knockout (KO) mice by removing the AIF2-specific exon and found that the relative expression of Aif1 mRNA increased in Aif2 KO mice and that this increase became even more pronounced as Aif2 KO mice aged compared to their wild-type (WT) littermates. Mitochondrial morphology and function, reproductive function, and behavior showed no differences between WT and Aif2 KO mice. However, lack of AIF2 enhanced brain injury in neonatal mice after HI compared to WT controls, and this effect was linked to increased oxidative stress but not to caspase-dependent or -independent apoptosis pathways. These results indicate that AIF2 deficiency exacerbates free radical production and HI-induced neonatal brain injury.
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Affiliation(s)
- Juan Rodriguez
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, 40530, Sweden
| | - Yaodong Zhang
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, 40530, Sweden
- Department of Pediatrics, Children's Hospital of Zhengzhou University, Zhengzhou, China
| | - Tao Li
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, 40530, Sweden
- Department of Pediatrics, Children's Hospital of Zhengzhou University, Zhengzhou, China
- Henan Key Laboratory of Child Brain Injury, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Cuicui Xie
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, 40530, Sweden
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
| | - Yanyan Sun
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, 40530, Sweden
- Henan Key Laboratory of Child Brain Injury, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Yiran Xu
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, 40530, Sweden
- Henan Key Laboratory of Child Brain Injury, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Kai Zhou
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, 40530, Sweden
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
| | - Kaiming Huo
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, 40530, Sweden
- Henan Key Laboratory of Child Brain Injury, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
- Department of Pediatrics, Second Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Yafeng Wang
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, 40530, Sweden
- Department of Pediatrics, Children's Hospital of Zhengzhou University, Zhengzhou, China
- Henan Key Laboratory of Child Brain Injury, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Xiaoyang Wang
- Henan Key Laboratory of Child Brain Injury, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, 40530, Sweden
| | - Daniel Andersson
- Sahlgrenska Cancer Center, Department of Pathology and Genetics, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, 40530, Sweden
| | - Anders Ståhlberg
- Sahlgrenska Cancer Center, Department of Pathology and Genetics, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, 40530, Sweden
- Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Qinghe Xing
- Institute of Biomedical Science of Fudan University, Shanghai, 201102, China
| | - Carina Mallard
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, 40530, Sweden
| | - Henrik Hagberg
- Center for Perinatal Medicine and Health, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | | | - Guido Kroemer
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
- Metabolomics and Cell Biology Platforms, GRCC, Villejuif, France; Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, INSERM U1138, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
- Pôle de Biologie, Hôpital Européen Georges Pompidou, Assistance Publique-Hôpitaux de Paris, Labex Immuno-Oncology, Paris, France
| | - Klas Blomgren
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
- Pediatric Hematology and Oncology, Karolinska University Hospital, Stockholm, Sweden
| | - Changlian Zhu
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, 40530, Sweden.
- Henan Key Laboratory of Child Brain Injury, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
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5
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Wiraswati HL, Hangen E, Sanz AB, Lam NV, Reinhardt C, Sauvat A, Mogha A, Ortiz A, Kroemer G, Modjtahedi N. Apoptosis inducing factor (AIF) mediates lethal redox stress induced by menadione. Oncotarget 2018; 7:76496-76507. [PMID: 27738311 PMCID: PMC5363526 DOI: 10.18632/oncotarget.12562] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 03/13/2016] [Accepted: 09/30/2016] [Indexed: 01/27/2023] Open
Abstract
Mitochondrial apoptosis inducing factor (AIF) is a redox-active enzyme that participates to the biogenesis/maintenance of complex I of the respiratory chain, yet also contributes to catabolic reactions in the context of regulated cell death when AIF translocates to the cytosol and to the nucleus. Here we explore the contribution of AIF to cell death induced by menadione (2-methyl-1,4-naphtoquinone; also called vitamin K3) in conditions in which this pro-oxidant does not cause the mitochondrial release of AIF, yet causes caspase-independent cell killing. Depletion of AIF from human cancer cells reduced the cytotoxicity of menadione. This cytoprotective effect was accompanied by the maintenance of high levels of reduced glutathione (GSH), which are normally depleted by menadione. In addition, AIF depletion reduced the arylation of cellular proteins induced by menadione. This menadione-triggered arylation, which can be measured by a fluorescence assay, is completely suppressed by addition of exogenous glutathione or N-acetyl cysteine. Complex I inhibition by Rotenone did not mimic the cytoprotective action of AIF depletion. Altogether, these results are compatible with the hypothesis that mitochondrion-sessile AIF facilitates lethal redox cycling of menadione, thereby precipitating protein arylation and glutathione depletion.
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Affiliation(s)
- Hesti Lina Wiraswati
- Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.,INSERM, U1138, Paris, France.,Gustave Roussy Cancer Campus, Villejuif, France.,Faculty of Medicine, Université Paris-Saclay, Kremlin-Bicêtre, France.,Institut Teknologi Bandung (ITB), Bandung, Indonesia
| | - Emilie Hangen
- Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.,INSERM, U1138, Paris, France.,Gustave Roussy Cancer Campus, Villejuif, France.,Faculty of Medicine, Université Paris-Saclay, Kremlin-Bicêtre, France
| | - Ana Belén Sanz
- Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.,INSERM, U1138, Paris, France.,Gustave Roussy Cancer Campus, Villejuif, France.,Faculty of Medicine, Université Paris-Saclay, Kremlin-Bicêtre, France.,Laboratory of Nephrology, IIS-Fundacion Jimenez Diaz UAM and REDINREN, Madrid, Spain
| | - Ngoc-Vy Lam
- Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.,INSERM, U1138, Paris, France.,Gustave Roussy Cancer Campus, Villejuif, France.,Faculty of Medicine, Université Paris-Saclay, Kremlin-Bicêtre, France
| | - Camille Reinhardt
- Gustave Roussy Cancer Campus, Villejuif, France.,Faculty of Medicine, Université Paris-Saclay, Kremlin-Bicêtre, France.,INSERM, U1030, Villejuif, France
| | - Allan Sauvat
- Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.,INSERM, U1138, Paris, France.,Gustave Roussy Cancer Campus, Villejuif, France.,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France
| | - Ariane Mogha
- Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.,INSERM, U1138, Paris, France.,Gustave Roussy Cancer Campus, Villejuif, France.,Faculty of Medicine, Université Paris-Saclay, Kremlin-Bicêtre, France
| | - Alberto Ortiz
- Laboratory of Nephrology, IIS-Fundacion Jimenez Diaz UAM and REDINREN, Madrid, Spain
| | - Guido Kroemer
- Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.,INSERM, U1138, Paris, France.,Gustave Roussy Cancer Campus, Villejuif, France.,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Université Pierre et Marie Curie, Paris, France.,Pôle de Biologie, Hôpital Européen Georges Pompidou, AP-HP, Paris, France.,Department of Women's and Children's Health, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden
| | - Nazanine Modjtahedi
- Gustave Roussy Cancer Campus, Villejuif, France.,Faculty of Medicine, Université Paris-Saclay, Kremlin-Bicêtre, France.,INSERM, U1030, Villejuif, France
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6
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Wu Q, Allouch A, Martins I, Modjtahedi N, Deutsch E, Perfettini JL. Macrophage biology plays a central role during ionizing radiation-elicited tumor response. Biomed J 2017; 40:200-211. [PMID: 28918908 PMCID: PMC6136289 DOI: 10.1016/j.bj.2017.06.003] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 06/01/2017] [Accepted: 06/11/2017] [Indexed: 12/13/2022] Open
Abstract
Radiation therapy is one of the major therapeutic modalities for most solid tumors. The anti-tumor effect of radiation therapy consists of the direct tumor cell killing, as well as the modulation of tumor microenvironment and the activation of immune response against tumors. Radiation therapy has been shown to promote immunogenic cells death, activate dendritic cells and enhance tumor antigen presentation and anti-tumor T cell activation. Radiation therapy also programs innate immune cells such as macrophages that leads to either radiosensitization or radioresistance, according to different tumors and different radiation regimen studied. The mechanisms underlying radiation-induced macrophage activation remain largely elusive. Various molecular players such as NF-κB, MAPKs, p53, reactive oxygen species, inflammasomes have been involved in these processes. The skewing to a pro-inflammatory phenotype thus results in the activation of anti-tumor immune response and enhanced radiotherapy effect. Therefore, a comprehensive understanding of the mechanism of radiation-induced macrophage activation and its role in tumor response to radiation therapy is crucial for the development of new therapeutic strategies to enhance radiation therapy efficacy.
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Affiliation(s)
- Qiuji Wu
- Cell Death and Aging Team, Gystave Roussy Cancer Campus, Villejuif, France; Laboratory of Molecular Radiotherapy, INSERM U1030, Gystave Roussy Cancer Campus, Villejuif, France; Gystave Roussy Cancer Campus, Villejuif, France; Université Paris Sud - Paris Saclay, Villejuif, France; Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Hubei, China; Hubei Key Laboratory of Tumor Biological Behaviors, Zhongnan Hospital, Wuhan University, Hubei, China
| | - Awatef Allouch
- Cell Death and Aging Team, Gystave Roussy Cancer Campus, Villejuif, France; Laboratory of Molecular Radiotherapy, INSERM U1030, Gystave Roussy Cancer Campus, Villejuif, France; Gystave Roussy Cancer Campus, Villejuif, France; Université Paris Sud - Paris Saclay, Villejuif, France
| | - Isabelle Martins
- Cell Death and Aging Team, Gystave Roussy Cancer Campus, Villejuif, France; Laboratory of Molecular Radiotherapy, INSERM U1030, Gystave Roussy Cancer Campus, Villejuif, France; Gystave Roussy Cancer Campus, Villejuif, France; Université Paris Sud - Paris Saclay, Villejuif, France
| | - Nazanine Modjtahedi
- Cell Death and Aging Team, Gystave Roussy Cancer Campus, Villejuif, France; Laboratory of Molecular Radiotherapy, INSERM U1030, Gystave Roussy Cancer Campus, Villejuif, France; Gystave Roussy Cancer Campus, Villejuif, France; Université Paris Sud - Paris Saclay, Villejuif, France
| | - Eric Deutsch
- Laboratory of Molecular Radiotherapy, INSERM U1030, Gystave Roussy Cancer Campus, Villejuif, France; Gystave Roussy Cancer Campus, Villejuif, France; Université Paris Sud - Paris Saclay, Villejuif, France
| | - Jean-Luc Perfettini
- Cell Death and Aging Team, Gystave Roussy Cancer Campus, Villejuif, France; Laboratory of Molecular Radiotherapy, INSERM U1030, Gystave Roussy Cancer Campus, Villejuif, France; Gystave Roussy Cancer Campus, Villejuif, France; Université Paris Sud - Paris Saclay, Villejuif, France.
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7
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Wu Q, Allouch A, Martins I, Brenner C, Modjtahedi N, Deutsch E, Perfettini JL. Modulating Both Tumor Cell Death and Innate Immunity Is Essential for Improving Radiation Therapy Effectiveness. Front Immunol 2017; 8:613. [PMID: 28603525 PMCID: PMC5445662 DOI: 10.3389/fimmu.2017.00613] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [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: 12/26/2016] [Accepted: 05/09/2017] [Indexed: 12/17/2022] Open
Abstract
Radiation therapy is one of the cornerstones of cancer treatment. In tumor cells, exposure to ionizing radiation (IR) provokes DNA damages that trigger various forms of cell death such as apoptosis, necrosis, autophagic cell death, and mitotic catastrophe. IR can also induce cellular senescence that could serve as an additional antitumor barrier in a context-dependent manner. Moreover, accumulating evidence has demonstrated that IR interacts profoundly with tumor-infiltrating immune cells, which cooperatively drive treatment outcomes. Recent preclinical and clinical successes due to the combination of radiation therapy and immune checkpoint blockade have underscored the need for a better understanding of the interplay between radiation therapy and the immune system. In this review, we will present an overview of cell death modalities induced by IR, summarize the immunogenic properties of irradiated cancer cells, and discuss the biological consequences of IR on innate immune cell functions, with a particular attention on dendritic cells, macrophages, and NK cells. Finally, we will discuss their potential applications in cancer treatment.
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Affiliation(s)
- Qiuji Wu
- Cell Death and Aging Team, Gustave Roussy Cancer Campus, Villejuif, France.,Laboratory of Molecular Radiotherapy, INSERM U1030, Gustave Roussy Cancer Campus, Villejuif, France.,Gustave Roussy Cancer Campus, Villejuif, France.,Université Paris Saclay, Villejuif, France.,Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Tumor Biological Behaviors, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Awatef Allouch
- Cell Death and Aging Team, Gustave Roussy Cancer Campus, Villejuif, France.,Laboratory of Molecular Radiotherapy, INSERM U1030, Gustave Roussy Cancer Campus, Villejuif, France.,Gustave Roussy Cancer Campus, Villejuif, France.,Université Paris Saclay, Villejuif, France
| | - Isabelle Martins
- Cell Death and Aging Team, Gustave Roussy Cancer Campus, Villejuif, France.,Laboratory of Molecular Radiotherapy, INSERM U1030, Gustave Roussy Cancer Campus, Villejuif, France.,Gustave Roussy Cancer Campus, Villejuif, France.,Université Paris Saclay, Villejuif, France
| | - Catherine Brenner
- Laboratory of Signaling and Cardiovascular Pathophysiology, INSERM UMR-S 1180, Université Paris-Sud, Faculté de Pharmacie, Châtenay-Malabry, France
| | - Nazanine Modjtahedi
- Laboratory of Molecular Radiotherapy, INSERM U1030, Gustave Roussy Cancer Campus, Villejuif, France.,Gustave Roussy Cancer Campus, Villejuif, France.,Université Paris Saclay, Villejuif, France
| | - Eric Deutsch
- Laboratory of Molecular Radiotherapy, INSERM U1030, Gustave Roussy Cancer Campus, Villejuif, France.,Gustave Roussy Cancer Campus, Villejuif, France.,Université Paris Saclay, Villejuif, France
| | - Jean-Luc Perfettini
- Cell Death and Aging Team, Gustave Roussy Cancer Campus, Villejuif, France.,Laboratory of Molecular Radiotherapy, INSERM U1030, Gustave Roussy Cancer Campus, Villejuif, France.,Gustave Roussy Cancer Campus, Villejuif, France.,Université Paris Saclay, Villejuif, France
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8
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Sun Y, Li T, Xie C, Xu Y, Zhou K, Rodriguez J, Han W, Wang X, Kroemer G, Modjtahedi N, Blomgren K, Zhu C. Haploinsufficiency in the mitochondrial protein CHCHD4 reduces brain injury in a mouse model of neonatal hypoxia-ischemia. Cell Death Dis 2017; 8:e2781. [PMID: 28492551 PMCID: PMC5520716 DOI: 10.1038/cddis.2017.196] [Citation(s) in RCA: 18] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 03/13/2017] [Accepted: 04/03/2017] [Indexed: 12/13/2022]
Abstract
Mitochondria contribute to neonatal hypoxic-ischemic brain injury by releasing potentially toxic proteins into the cytosol. CHCHD4 is a mitochondrial intermembrane space protein that plays a major role in the import of intermembrane proteins and physically interacts with apoptosis-inducing factor (AIF). The purpose of this study was to investigate the impact of CHCHD4 haploinsufficiency on mitochondrial function and brain injury after cerebral hypoxia-ischemia (HI) in neonatal mice. CHCHD4+/- and wild-type littermate mouse pups were subjected to unilateral cerebral HI on postnatal day 9. CHCHD4 haploinsufficiency reduced insult-related AIF and superoxide dismutase 2 release from the mitochondria and reduced neuronal cell death. The total brain injury volume was reduced by 21.5% at 3 days and by 31.3% at 4 weeks after HI in CHCHD4+/- mice. However, CHCHD4 haploinsufficiency had no influence on mitochondrial biogenesis, fusion, or fission; neural stem cell proliferation; or neural progenitor cell differentiation. There were no significant changes in the expression or distribution of p53 protein or p53 pathway-related genes under physiological conditions or after HI. These results suggest that CHCHD4 haploinsufficiency afforded persistent neuroprotection related to reduced release of mitochondrial intermembrane space proteins. The CHCHD4-dependent import pathway might thus be a potential therapeutic target for preventing or treating neonatal brain injury.
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Affiliation(s)
- Yanyan Sun
- Henan Key Laboratory of Child Brain Injury, Department of Pediatrics, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Tao Li
- Henan Key Laboratory of Child Brain Injury, Department of Pediatrics, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Pediatrics, Zhengzhou Children’s Hospital, Zhengzhou, China
| | - Cuicui Xie
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Yiran Xu
- Henan Key Laboratory of Child Brain Injury, Department of Pediatrics, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Kai Zhou
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Women’s and Children’s Health, Karolinska Institutet, Stockholm, Sweden
| | - Juan Rodriguez
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Wei Han
- Henan Key Laboratory of Child Brain Injury, Department of Pediatrics, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Women’s and Children’s Health, Karolinska Institutet, Stockholm, Sweden
| | - Xiaoyang Wang
- Henan Key Laboratory of Child Brain Injury, Department of Pediatrics, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Perinatal Center, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Guido Kroemer
- Department of Women’s and Children’s Health, Karolinska Institutet, Stockholm, Sweden
- INSERM, U1138, Paris, France
- Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
- Université Paris Descartes/Paris V, Sorbonne Paris Cité, Paris, France
- Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France
| | - Nazanine Modjtahedi
- Laboratory of Molecular Radiotherapy, INSERM U1030, Gustave Roussy, Villejuif F-94805, France
- Gustave Roussy, Villejuif F-94805, France
- Department of Medicine, Université Paris-Saclay, Kremlin-Bicêtre, France
| | - Klas Blomgren
- Department of Women’s and Children’s Health, Karolinska Institutet, Stockholm, Sweden
- Department of Pediatric Oncology, Karolinska University Hospital, Stockholm, Sweden
| | - Changlian Zhu
- Henan Key Laboratory of Child Brain Injury, Department of Pediatrics, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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9
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Rivera S, Leteur C, Mégnin F, Law F, Martins I, Kloos I, Depil S, Modjtahedi N, Perfettini JL, Hennequin C, Deutsch E. Time dependent modulation of tumor radiosensitivity by a pan HDAC inhibitor: abexinostat. Oncotarget 2017; 8:56210-56227. [PMID: 28915585 PMCID: PMC5593556 DOI: 10.18632/oncotarget.14813] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 11/30/2016] [Indexed: 02/06/2023] Open
Abstract
Despite prominent role of radiotherapy in lung cancer management, there is an urgent need for strategies increasing therapeutic efficacy. Reversible epigenetic changes are promising targets for combination strategies using HDAC inhibitors (HDACi). Here we evaluated on two NSCLC cell lines, the antitumor effect of abexinostat, a novel pan HDACi combined with irradiation in vitro in normoxia and hypoxia, by clonogenic assays, demonstrating that abexinostat enhances radiosensitivity in a time dependent way with mean SER10 between 1.6 and 2.5 for A549 and H460. We found, by immunofluorescence staining, flow cytometry assays and western blotting, in abexinostat treated cells, increasing radio-induced caspase dependent apoptosis and persistent DNA double-strand breaks associated with decreased DNA damage signalling and repair. Interestingly, we demonstrated on nude mice xenografts that abexinostat potentiates tumor growth delay in combined modality treatments associating not only abexinostat and irradiation but also when adding cisplatin. Altogether, our data demonstrate in vitro and in vivo anti-tumor effect potentiation by abexinostat combined with irradiation in NSCLC. Moreover, our work suggests for the first time to our knowledge promising triple combination opportunities with HDACi, irradiation and cisplatin which deserves further investigations and could be of major interest in the treatment of NSCLC.
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Affiliation(s)
- Sofia Rivera
- Department of Radiotherapy, Gustave-Roussy Cancer Campus, Villejuif, France.,INSERM 1030 Molecular Radiotherapy, Villejuif, France.,Faculté de Médecine, Université Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
| | - Céline Leteur
- Department of Radiotherapy, Gustave-Roussy Cancer Campus, Villejuif, France.,INSERM 1030 Molecular Radiotherapy, Villejuif, France
| | - Frédérique Mégnin
- INSERM U1196/UMR9187 CMIB, Institut Curie-Recherche, Université Paris Saclay, Le Kremlin-Bicêtre, France
| | - Frédéric Law
- Department of Radiotherapy, Gustave-Roussy Cancer Campus, Villejuif, France.,INSERM 1030 Molecular Radiotherapy, Villejuif, France
| | - Isabelle Martins
- Department of Radiotherapy, Gustave-Roussy Cancer Campus, Villejuif, France.,INSERM 1030 Molecular Radiotherapy, Villejuif, France
| | - Ioana Kloos
- IRIS: Institut de Recherches Internationales Servier, Suresnes, France
| | - Stéphane Depil
- IRIS: Institut de Recherches Internationales Servier, Suresnes, France
| | - Nazanine Modjtahedi
- Department of Radiotherapy, Gustave-Roussy Cancer Campus, Villejuif, France.,INSERM 1030 Molecular Radiotherapy, Villejuif, France
| | - Jean Luc Perfettini
- Department of Radiotherapy, Gustave-Roussy Cancer Campus, Villejuif, France.,INSERM 1030 Molecular Radiotherapy, Villejuif, France
| | | | - Eric Deutsch
- Department of Radiotherapy, Gustave-Roussy Cancer Campus, Villejuif, France.,INSERM 1030 Molecular Radiotherapy, Villejuif, France.,Faculté de Médecine, Université Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
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10
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Modjtahedi N, Tokatlidis K, Dessen P, Kroemer G. Mitochondrial Proteins Containing Coiled-Coil-Helix-Coiled-Coil-Helix (CHCH) Domains in Health and Disease. Trends Biochem Sci 2016; 41:245-260. [PMID: 26782138 DOI: 10.1016/j.tibs.2015.12.004] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 12/08/2015] [Accepted: 12/15/2015] [Indexed: 11/19/2022]
Abstract
Members of the coiled-coil-helix-coiled-coil-helix (CHCH) domain-containing protein family that carry (CX9C) type motifs are imported into the mitochondrion with the help of the disulfide relay-dependent MIA import pathway. These evolutionarily conserved proteins are emerging as new cellular factors that control mitochondrial respiration, redox regulation, lipid homeostasis, and membrane ultrastructure and dynamics. We discuss recent insights on the activity of known (CX9C) motif-carrying proteins in mammals and review current data implicating the Mia40/CHCHD4 import machinery in the regulation of their mitochondrial import. Recent findings and the identification of disease-associated mutations in specific (CX9C) motif-carrying proteins have highlighted members of this family of proteins as potential therapeutic targets in a variety of human disorders.
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Affiliation(s)
- Nazanine Modjtahedi
- Institut National de la Santé et de la Recherche Médicale, U1030, Villejuif, France; Gustave Roussy Cancer Campus, Villejuif, France; Faculty of Medicine, Université Paris-Saclay, Kremlin-Bicêtre, France.
| | - Kostas Tokatlidis
- Institute of Molecular Cell and Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK
| | - Philippe Dessen
- Gustave Roussy Cancer Campus, Villejuif, France; Faculty of Medicine, Université Paris-Saclay, Kremlin-Bicêtre, France; Groupe bioinformatique Gustave Roussy Cancer Campus, Villejuif, France
| | - Guido Kroemer
- Equipe 11 Labellisée Ligue Nationale Contre le Cancer, Centre de Recherche des Cordeliers, Paris, France; Institut National de la Santé et de la Recherche Médicale, U1138, Paris, France; Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France; Université Pierre et Marie Curie, Paris, France; Pôle de Biologie, Hôpital Européen Georges Pompidou, Paris, AP-HP, France; Karolinska Institute, Department of Women's and Children's Health, Karolinska University Hospital, Stockholm, Sweden.
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11
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Modjtahedi N, Kroemer G. CHCHD4 links AIF to the biogenesis of respiratory chain complex I. Mol Cell Oncol 2015; 3:e1074332. [PMID: 27308594 DOI: 10.1080/23723556.2015.1074332] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 07/14/2015] [Accepted: 07/14/2015] [Indexed: 10/23/2022]
Abstract
During the evolution from yeast to mammals the Mia40 protein, the regulator of the redox-sensitive mitochondrial intermembrane space import machinery, has lost its membrane-anchorage segment to become CHCHD4, which interacts with the flavoprotein apoptosis-inducing factor (AIF). Our results establish CHCHD4 as the missing link between AIF deficiency and dysfunctional biogenesis of respiratory chain complexes.
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Affiliation(s)
- Nazanine Modjtahedi
- Equipe 11 labellisée Ligue Nationale contre le Cancer, Center de Recherche des Cordeliers, Paris, France; Institut National de la Santé et de la Recherche Médicale, U1138, Paris, France; Institut Gustave Roussy Cancer Campus, Villejuif, France; Faculty of Medicine, University of Paris Sud, Kremlin-Bicêtre, France
| | - Guido Kroemer
- Equipe 11 labellisée Ligue Nationale contre le Cancer, Center de Recherche des Cordeliers, Paris, France; Institut National de la Santé et de la Recherche Médicale, U1138, Paris, France; Institut Gustave Roussy Cancer Campus, Villejuif, France; Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France; Université Pierre et Marie Curie, Paris, France; Pôle de Biologie, Hôpital Européen Georges Pompidou, AP-HP, Paris, France
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12
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Abstract
Hypomorphic mutation of apoptosis-inducing factor (AIF) in the whole body or organ-specific knockout of AIF compromises the activity of respiratory chain complexes I and IV, as it confers resistance to obesity and diabetes induced by high-fat diet. The mitochondrial defect induced by AIF deficiency can be explained by reduced AIF-dependent mitochondrial import of CHCHD4, which in turn is required for optimal import and assembly of respiratory chain complexes. Here we show that, as compared to wild type control littermates, mice with a heterozygous knockout of CHCHD4 exhibit reduced weight gain when fed with a Western style high-fat diet. This finding suggests widespread metabolic epistasis among AIF and CHCHD4. Targeting either of these proteins or their functional interaction might constitute a novel strategy to combat obesity.
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Affiliation(s)
- Nazanine Modjtahedi
- a Equipe 11 labellisée Ligue Nationale contre le Cancer; Center de Recherche des Cordeliers ; Paris , France
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13
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Hangen E, Féraud O, Lachkar S, Mou H, Doti N, Fimia GM, Lam NV, Zhu C, Godin I, Muller K, Chatzi A, Nuebel E, Ciccosanti F, Flamant S, Bénit P, Perfettini JL, Sauvat A, Bennaceur-Griscelli A, Ser-Le Roux K, Gonin P, Tokatlidis K, Rustin P, Piacentini M, Ruvo M, Blomgren K, Kroemer G, Modjtahedi N. Interaction between AIF and CHCHD4 Regulates Respiratory Chain Biogenesis. Mol Cell 2015; 58:1001-14. [PMID: 26004228 DOI: 10.1016/j.molcel.2015.04.020] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 02/27/2015] [Accepted: 04/14/2015] [Indexed: 12/19/2022]
Abstract
Apoptosis-inducing factor (AIF) is a mitochondrial flavoprotein that, beyond its apoptotic function, is required for the normal expression of major respiratory chain complexes. Here we identified an AIF-interacting protein, CHCHD4, which is the central component of a redox-sensitive mitochondrial intermembrane space import machinery. Depletion or hypomorphic mutation of AIF caused a downregulation of CHCHD4 protein by diminishing its mitochondrial import. CHCHD4 depletion sufficed to induce a respiratory defect that mimicked that observed in AIF-deficient cells. CHCHD4 levels could be restored in AIF-deficient cells by enforcing its AIF-independent mitochondrial localization. This modified CHCHD4 protein reestablished respiratory function in AIF-deficient cells and enabled AIF-deficient embryoid bodies to undergo cavitation, a process of programmed cell death required for embryonic morphogenesis. These findings explain how AIF contributes to the biogenesis of respiratory chain complexes, and they establish an unexpected link between the vital function of AIF and the propensity of cells to undergo apoptosis.
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Affiliation(s)
- Emilie Hangen
- Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, 75006 Paris, France; INSERM, UMRS 1138, 75006 Paris, France; Gustave Roussy Comprehensive Cancer Center, 94805 Villejuif, France; Université Paris Descartes/Paris V, Sorbonne Paris Cité, 75006 Paris, France; Université Pierre et Marie Curie, 75006 Paris, France
| | - Olivier Féraud
- Université Paris Sud/Paris XI, 94270 Kremlin Bicêtre, France; INSERM U935, 94805 Villejuif, France; ESTeam Paris Sud, Stem Cell Core Facility, Institut André Lwoff, 94800 Villejuif, France
| | - Sylvie Lachkar
- Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, 75006 Paris, France; INSERM, UMRS 1138, 75006 Paris, France; Gustave Roussy Comprehensive Cancer Center, 94805 Villejuif, France; Université Paris Descartes/Paris V, Sorbonne Paris Cité, 75006 Paris, France; Université Pierre et Marie Curie, 75006 Paris, France
| | - Haiwei Mou
- Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, 75006 Paris, France; INSERM, UMRS 1138, 75006 Paris, France; Gustave Roussy Comprehensive Cancer Center, 94805 Villejuif, France; Université Paris Descartes/Paris V, Sorbonne Paris Cité, 75006 Paris, France; Université Pierre et Marie Curie, 75006 Paris, France
| | - Nunzianna Doti
- Istituto di Biostrutture e Bioimmagini, CNR, 80134 Napoli, Italy
| | - Gian Maria Fimia
- Department of Epidemiology and Preclinical Research, National Institute for Infectious Diseases IRCCS "L. Spallanzani," 00149 Rome, Italy; Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Lecce 73100, Italy
| | - Ngoc-Vy Lam
- Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, 75006 Paris, France; INSERM, UMRS 1138, 75006 Paris, France; Gustave Roussy Comprehensive Cancer Center, 94805 Villejuif, France; Université Paris Descartes/Paris V, Sorbonne Paris Cité, 75006 Paris, France; Université Pierre et Marie Curie, 75006 Paris, France
| | - Changlian Zhu
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Isabelle Godin
- Gustave Roussy Comprehensive Cancer Center, 94805 Villejuif, France; Université Paris Sud/Paris XI, 94270 Kremlin Bicêtre, France; INSERM U1009, 94805 Villejuif, France
| | - Kevin Muller
- Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, 75006 Paris, France; INSERM, UMRS 1138, 75006 Paris, France; Gustave Roussy Comprehensive Cancer Center, 94805 Villejuif, France; Université Paris Descartes/Paris V, Sorbonne Paris Cité, 75006 Paris, France; Université Pierre et Marie Curie, 75006 Paris, France
| | - Afroditi Chatzi
- Institute of Molecular Cell and Systems Biology, University of Glasgow, G12 8QQ Glasgow, UK; Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology, Heraklion Crete 70013, Greece
| | - Esther Nuebel
- Institute of Molecular Cell and Systems Biology, University of Glasgow, G12 8QQ Glasgow, UK; Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology, Heraklion Crete 70013, Greece
| | - Fabiola Ciccosanti
- Department of Epidemiology and Preclinical Research, National Institute for Infectious Diseases IRCCS "L. Spallanzani," 00149 Rome, Italy
| | - Stéphane Flamant
- Université Paris Sud/Paris XI, 94270 Kremlin Bicêtre, France; INSERM U935, 94805 Villejuif, France
| | - Paule Bénit
- INSERM UMR1141, Hôpital Robert Debré, 75019 Paris, France; Faculté de Médecine Denis Diderot, Université Paris 7, 75013 Paris, France
| | - Jean-Luc Perfettini
- Gustave Roussy Comprehensive Cancer Center, 94805 Villejuif, France; Université Paris Sud/Paris XI, 94270 Kremlin Bicêtre, France; Cell Death and Aging Team, Gustave Roussy, 94805 Villejuif, France; INSERM U1030, Gustave Roussy, 94805 Villejuif, France
| | - Allan Sauvat
- Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, 75006 Paris, France; INSERM, UMRS 1138, 75006 Paris, France; Gustave Roussy Comprehensive Cancer Center, 94805 Villejuif, France; Cell Biology and Metabolomics Platforms, Gustave Roussy Comprehensive Cancer Center, 94805 Villejuif, France
| | - Annelise Bennaceur-Griscelli
- Université Paris Sud/Paris XI, 94270 Kremlin Bicêtre, France; INSERM U935, 94805 Villejuif, France; ESTeam Paris Sud, Stem Cell Core Facility, Institut André Lwoff, 94800 Villejuif, France; Laboratoire d'Hématologie, Hôpital Paul Brousse AP-HP, 94800 Villejuif, France
| | - Karine Ser-Le Roux
- Gustave Roussy Comprehensive Cancer Center, 94805 Villejuif, France; Université Paris Sud/Paris XI, 94270 Kremlin Bicêtre, France; Animal and Veterinary Resources, 94805 Villejuif, France
| | - Patrick Gonin
- Gustave Roussy Comprehensive Cancer Center, 94805 Villejuif, France; Université Paris Sud/Paris XI, 94270 Kremlin Bicêtre, France; Animal and Veterinary Resources, 94805 Villejuif, France
| | - Kostas Tokatlidis
- Institute of Molecular Cell and Systems Biology, University of Glasgow, G12 8QQ Glasgow, UK; Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology, Heraklion Crete 70013, Greece
| | - Pierre Rustin
- INSERM UMR1141, Hôpital Robert Debré, 75019 Paris, France; Faculté de Médecine Denis Diderot, Université Paris 7, 75013 Paris, France
| | - Mauro Piacentini
- Department of Epidemiology and Preclinical Research, National Institute for Infectious Diseases IRCCS "L. Spallanzani," 00149 Rome, Italy; Department of Biology, University of Rome "Tor Vergata," 00133 Rome, Italy
| | - Menotti Ruvo
- Istituto di Biostrutture e Bioimmagini, CNR, 80134 Napoli, Italy
| | - Klas Blomgren
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, University of Gothenburg, 40530 Gothenburg, Sweden; Department of Pediatrics, University of Gothenburg, The Queen Silvia Children's Hospital, 40530 Gothenburg, Sweden; Karolinska Institute, Department of Women's and Children's Health, Karolinska University Hospital, 171 76 Stockholm, Sweden
| | - Guido Kroemer
- Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, 75006 Paris, France; INSERM, UMRS 1138, 75006 Paris, France; Gustave Roussy Comprehensive Cancer Center, 94805 Villejuif, France; Université Paris Descartes/Paris V, Sorbonne Paris Cité, 75006 Paris, France; Université Pierre et Marie Curie, 75006 Paris, France; Cell Biology and Metabolomics Platforms, Gustave Roussy Comprehensive Cancer Center, 94805 Villejuif, France; Pôle de Biologie, Hôpital Européen Georges Pompidou, AP-HP, 75015 Paris, France.
| | - Nazanine Modjtahedi
- Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, 75006 Paris, France; INSERM, UMRS 1138, 75006 Paris, France; Gustave Roussy Comprehensive Cancer Center, 94805 Villejuif, France; Université Paris Descartes/Paris V, Sorbonne Paris Cité, 75006 Paris, France; Université Pierre et Marie Curie, 75006 Paris, France.
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14
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Menger L, Vacchelli E, Adjemian S, Martins I, Ma Y, Shen S, Yamazaki T, Sukkurwala AQ, Michaud M, Mignot G, Schlemmer F, Sulpice E, Locher C, Gidrol X, Ghiringhelli F, Modjtahedi N, Galluzzi L, Andre F, Zitvogel L, Kepp O, Kroemer G. Cardiac Glycosides Exert Anticancer Effects by Inducing Immunogenic Cell Death. Sci Transl Med 2012; 4:143ra99. [DOI: 10.1126/scitranslmed.3003807] [Citation(s) in RCA: 288] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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15
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Séror C, Melki MT, Subra F, Raza SQ, Bras M, Saïdi H, Nardacci R, Voisin L, Paoletti A, Law F, Martins I, Amendola A, Abdul-Sater AA, Ciccosanti F, Delelis O, Niedergang F, Thierry S, Said-Sadier N, Lamaze C, Métivier D, Estaquier J, Fimia GM, Falasca L, Casetti R, Modjtahedi N, Kanellopoulos J, Mouscadet JF, Ojcius DM, Piacentini M, Gougeon ML, Kroemer G, Perfettini JL. Extracellular ATP acts on P2Y2 purinergic receptors to facilitate HIV-1 infection. ACTA ACUST UNITED AC 2011; 208:1823-34. [PMID: 21859844 PMCID: PMC3171090 DOI: 10.1084/jem.20101805] [Citation(s) in RCA: 140] [Impact Index Per Article: 10.8] [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] [Indexed: 12/27/2022]
Abstract
Extracellular adenosine triphosphate (ATP) can activate purinergic receptors of the plasma membrane and modulate multiple cellular functions. We report that ATP is released from HIV-1 target cells through pannexin-1 channels upon interaction between the HIV-1 envelope protein and specific target cell receptors. Extracellular ATP then acts on purinergic receptors, including P2Y2, to activate proline-rich tyrosine kinase 2 (Pyk2) kinase and transient plasma membrane depolarization, which in turn stimulate fusion between Env-expressing membranes and membranes containing CD4 plus appropriate chemokine co-receptors. Inhibition of any of the constituents of this cascade (pannexin-1, ATP, P2Y2, and Pyk2) impairs the replication of HIV-1 mutant viruses that are resistant to conventional antiretroviral agents. Altogether, our results reveal a novel signaling pathway involved in the early steps of HIV-1 infection that may be targeted with new therapeutic approaches.
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Affiliation(s)
- Claire Séror
- Institut National de la Santé et de la Recherche Médicale (INSERM) U848, F-94805 Villejuif, France
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16
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17
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Osato K, Sato Y, Ochiishi T, Osato A, Zhu C, Sato M, Swanpalmer J, Modjtahedi N, Kroemer G, Kuhn HG, Blomgren K. Apoptosis-inducing factor deficiency decreases the proliferation rate and protects the subventricular zone against ionizing radiation. Cell Death Dis 2010; 1:e84. [PMID: 21368857 PMCID: PMC3035904 DOI: 10.1038/cddis.2010.63] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Cranial radiotherapy in children often leads to progressive cognitive decline. We have established a rodent model of irradiation-induced injury to the young brain. A single dose of 8 Gy was administered to the left hemisphere of postnatal day 10 (P10) mice. Harlequin (Hq) mice, carrying the hypomorphic apoptosis-inducing factor AIFHq mutation, express 60% less AIF at P10 and displayed significantly fewer dying cells in the subventricular zone (SVZ) 6 h after IR, compared with wild type (Wt) littermates. Irradiated cyclophilin A-deficient (CypA−/−) mice confirmed that CypA has an essential role in AIF-induced apoptosis after IR. Hq mice displayed no reduction in SVZ size 7 days after IR, whereas 48% of the SVZ was lost in Wt mice. The proliferation rate was lower in the SVZ of Hq mice. Cultured neural precursor cells from the SVZ of Hq mice displayed a slower proliferation rate and were more resistant to IR. IR preferentially kills proliferating cells, and the slower proliferation rate in the SVZ of Hq mice may, at least partly, explain the protective effect of the Hq mutation. Together, these results indicate that targeting AIF may provide a fruitful strategy for protection of normal brain tissue against the detrimental side effects of IR.
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Affiliation(s)
- K Osato
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, University of Gothenburg, Sweden
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18
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Hangen E, De Zio D, Bordi M, Zhu C, Dessen P, Caffin F, Lachkar S, Perfettini JL, Lazar V, Benard J, Fimia GM, Piacentini M, Harper F, Pierron G, Vicencio JM, Bénit P, de Andrade A, Höglinger G, Culmsee C, Rustin P, Blomgren K, Cecconi F, Kroemer G, Modjtahedi N. A brain-specific isoform of mitochondrial apoptosis-inducing factor: AIF2. Cell Death Differ 2010; 17:1155-66. [PMID: 20111043 DOI: 10.1038/cdd.2009.211] [Citation(s) in RCA: 28] [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: 11/08/2022] Open
Abstract
Apoptosis-inducing factor (AIF) has important supportive as well as potentially lethal roles in neurons. Under normal physiological conditions, AIF is a vital redox-active mitochondrial enzyme, whereas in pathological situations, it translocates from mitochondria to the nuclei of injured neurons and mediates apoptotic chromatin condensation and cell death. In this study, we reveal the existence of a brain-specific isoform of AIF, AIF2, whose expression increases as neuronal precursor cells differentiate. AIF2 arises from the utilization of the alternative exon 2b, yet uses the same remaining 15 exons as the ubiquitous AIF1 isoform. AIF1 and AIF2 are similarly imported to mitochondria in which they anchor to the inner membrane facing the intermembrane space. However, the mitochondrial inner membrane sorting signal encoded in the exon 2b of AIF2 is more hydrophobic than that of AIF1, indicating a stronger membrane anchorage of AIF2 than AIF1. AIF2 is more difficult to be desorbed from mitochondria than AIF1 on exposure to non-ionic detergents or basic pH. Furthermore, AIF2 dimerizes with AIF1, thereby preventing its release from mitochondria. Conversely, it is conceivable that a neuron-specific AIF isoform, AIF2, may have been 'designed' to be retained in mitochondria and to minimize its potential neurotoxic activity.
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Sato Y, Osato K, Ochiishi T, Osato A, Zhu C, Sato M, Swanpalmer J, Modjtahedi N, Kroemer G, Kuhn GH, Blomgren K. Apoptosis-inducing factor deficiency decreases the proliferation rate and protects the subventricular zone against ionizing radiation. Neurosci Res 2010. [DOI: 10.1016/j.neures.2010.07.1149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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20
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Moschetti T, Giuffrè A, Ardiccioni C, Vallone B, Modjtahedi N, Kroemer G, Brunori M. Failure of apoptosis-inducing factor to act as neuroglobin reductase. Biochem Biophys Res Commun 2009; 390:121-4. [PMID: 19782043 DOI: 10.1016/j.bbrc.2009.09.078] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2009] [Accepted: 09/21/2009] [Indexed: 11/18/2022]
Abstract
Neuroglobin (Ngb) is a hexacoordinate globin expressed in the nervous system of vertebrates, where it protects neurons against hypoxia. Ferrous Ngb has been proposed to favor cell survival by scavenging NO and/or reducing cytochrome c released into the cytosol during hypoxic stress. Both catalytic functions require an as yet unidentified Ngb-reductase activity. Such an activity was detected both in tissue homogenates of human brain and liver and in Escherichia coli extracts. Since NADH:flavorubredoxin oxidoreductase from E. coli, that was shown to reduce ferric Ngb, shares sequence similarity with the human apoptosis-inducing factor (AIF), AIF has been proposed by us as a candidate Ngb reductase. In this study, we tested this hypothesis and show that the Ngb-reductase activity of recombinant human AIF is negligible and hence incompatible with such a physiological function.
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Affiliation(s)
- Tommaso Moschetti
- Department of Biochemical Sciences and CNR Institute of Molecular Biology and Pathology, Sapienza University of Rome, I-00185 Rome, Italy
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21
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22
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Tasdemir E, Galluzzi L, Maiuri MC, Criollo A, Vitale I, Hangen E, Modjtahedi N, Kroemer G. Methods for assessing autophagy and autophagic cell death. Methods Mol Biol 2008; 445:29-76. [PMID: 18425442 DOI: 10.1007/978-1-59745-157-4_3] [Citation(s) in RCA: 149] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Autophagic (or type 2) cell death is characterized by the massive accumulation of autophagic vacuoles (autophagosomes) in the cytoplasm of cells that lack signs of apoptosis (type 1 cell death). Here we detail and critically assess a series of methods to promote and inhibit autophagy via pharmacological and genetic manipulations. We also review the techniques currently available to detect autophagy, including transmission electron microscopy, half-life assessments of long-lived proteins, detection of LC3 maturation/aggregation, fluorescence microscopy, and colocalization of mitochondrion- or endoplasmic reticulum-specific markers with lysosomal proteins. Massive autophagic vacuolization may cause cellular stress and represent a frustrated attempt of adaptation. In this case, cell death occurs with (or in spite of) autophagy. When cell death occurs through autophagy, on the contrary, the inhibition of the autophagic process should prevent cellular demise. Accordingly, we describe a strategy for discriminating cell death with autophagy from cell death through autophagy.
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Affiliation(s)
- Ezgi Tasdemir
- INSERM, Unit Apoptosis, Cancer and Immunity, Villejuif, France
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23
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Panaretakis T, Joza N, Modjtahedi N, Tesniere A, Vitale I, Durchschlag M, Fimia GM, Kepp O, Piacentini M, Froehlich KU, van Endert P, Zitvogel L, Madeo F, Kroemer G. The co-translocation of ERp57 and calreticulin determines the immunogenicity of cell death. Cell Death Differ 2008; 15:1499-509. [PMID: 18464797 DOI: 10.1038/cdd.2008.67] [Citation(s) in RCA: 262] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The exposure of calreticulin (CRT) on the plasma membrane can precede anthracycline-induced apoptosis and is required for cell death to be perceived as immunogenic. Mass spectroscopy, immunofluorescence and immunoprecipitation experiments revealed that CRT co-translocates to the surface with another endoplasmic reticulum-sessile protein, the disulfide isomerase ERp57. The knockout and knockdown of CRT or ERp57 inhibited the anthracycline-induced translocation of ERp57 or CRT, respectively. CRT point mutants that fail to interact with ERp57 were unable to restore ERp57 translocation upon transfection into crt(-/-) cells, underscoring that a direct interaction between CRT and ERp57 is strictly required for their co-translocation to the surface. ERp57(low) tumor cells generated by retroviral introduction of an ERp57-specific shRNA exhibited a normal apoptotic response to anthracyclines in vitro, yet were resistant to anthracycline treatment in vivo. Moreover, ERp57(low) cancer cells (which failed to expose CRT) treated with anthracyclines were unable to elicit an anti-tumor response in conditions in which control cells were highly immunogenic. The failure of ERp57(low) cells to elicit immune responses and to respond to chemotherapy could be overcome by exogenous supply of recombinant CRT protein. These results indicate that tumors that possess an intrinsic defect in the CRT-translocating machinery become resistant to anthracycline chemotherapy due to their incapacity to elicit an anti-cancer immune response.
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Affiliation(s)
- T Panaretakis
- INSERM, Unit 848 'Apoptosis, Cancer and Immunity', F-94805 Villejuif, France
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24
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Tajeddine N, Galluzzi L, Kepp O, Hangen E, Morselli E, Senovilla L, Araujo N, Pinna G, Larochette N, Zamzami N, Modjtahedi N, Harel-Bellan A, Kroemer G. Hierarchical involvement of Bak, VDAC1 and Bax in cisplatin-induced cell death. Oncogene 2008; 27:4221-32. [DOI: 10.1038/onc.2008.63] [Citation(s) in RCA: 173] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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25
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Galluzzi L, Vitale I, Kepp O, Séror C, Hangen E, Perfettini JL, Modjtahedi N, Kroemer G. Methods to dissect mitochondrial membrane permeabilization in the course of apoptosis. Methods Enzymol 2008; 442:355-74. [PMID: 18662579 DOI: 10.1016/s0076-6879(08)01418-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In several paradigms of cell death, mitochondrial membrane permeabilization (MMP) delimits the frontier between life and death. Mitochondria control the intrinsic pathway of apoptosis and participate in the extrinsic pathway. Moreover, they have been implicated in nonapoptotic cell death modalities. Irrespective of its initiation at the inner or the outer mitochondrial membrane (IM and OM, respectively), MMP culminates in the functional (dissipation of the mitochondrial transmembrane potential, shutdown of ATP synthesis, redox imbalance) and structural (reorganization of cristae, release of toxic intermembrane space proteins into the cytosol) collapse of mitochondria. This has a profound impact on cellular metabolism, activates caspase-dependent and -independent executioner mechanisms, and finally results in the demise of the cell. However, the partial and/or temporary permeabilization of one or both mitochondrial membranes is not always a prelude to cell death. This chapter proposes a method and several guidelines to discriminate between IM and OM permeabilization and to identify MMP that does indeed precede cell death. This approach relies on the integration of currently available techniques and may be easily introduced in the laboratory routine for a more precise detection of cell death.
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Affiliation(s)
- Lorenzo Galluzzi
- INSERM, U848, Institut Gustave Roussy, and Université Paris-Sud 11, Villejuif, France
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26
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Zhu C, Wang X, Deinum J, Huang Z, Gao J, Modjtahedi N, Neagu MR, Nilsson M, Eriksson PS, Hagberg H, Luban J, Kroemer G, Blomgren K. Cyclophilin A participates in the nuclear translocation of apoptosis-inducing factor in neurons after cerebral hypoxia-ischemia. ACTA ACUST UNITED AC 2007; 204:1741-8. [PMID: 17635954 PMCID: PMC2118669 DOI: 10.1084/jem.20070193] [Citation(s) in RCA: 161] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Upon cerebral hypoxia-ischemia (HI), apoptosis-inducing factor (AIF) can move from mitochondria to nuclei, participate in chromatinolysis, and contribute to the execution of cell death. Previous work (Cande, C., N. Vahsen, I. Kouranti, E. Schmitt, E. Daugas, C. Spahr, J. Luban, R.T. Kroemer, F. Giordanetto, C. Garrido, et al. 2004. Oncogene. 23:1514–1521) performed in vitro suggests that AIF must interact with cyclophilin A (CypA) to form a proapoptotic DNA degradation complex. We addressed the question as to whether elimination of CypA may afford neuroprotection in vivo. 9-d-old wild-type (WT), CypA+/−, or CypA−/− mice were subjected to unilateral cerebral HI. The infarct volume after HI was reduced by 47% (P = 0.0089) in CypA−/− mice compared with their WT littermates. Importantly, CypA−/− neurons failed to manifest the HI-induced nuclear translocation of AIF that was observed in WT neurons. Conversely, CypA accumulated within the nuclei of damaged neurons after HI, and this nuclear translocation of CypA was suppressed in AIF-deficient harlequin mice. Immunoprecipitation of AIF revealed coprecipitation of CypA, but only in injured, ischemic tissue. Surface plasmon resonance revealed direct molecular interactions between recombinant AIF and CypA. These data indicate that the lethal translocation of AIF to the nucleus requires interaction with CypA, suggesting a model in which two proteins that normally reside in separate cytoplasmic compartments acquire novel properties when moving together to the nucleus.
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Affiliation(s)
- Changlian Zhu
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Göteborg University, 405 30 Göteborg, Sweden.
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27
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Castedo M, Coquelle A, Vivet S, Vitale I, Kauffmann A, Dessen P, Pequignot MO, Casares N, Valent A, Mouhamad S, Schmitt E, Modjtahedi N, Vainchenker W, Zitvogel L, Lazar V, Garrido C, Kroemer G. Apoptosis regulation in tetraploid cancer cells. EMBO J 2006; 25:2584-95. [PMID: 16675948 PMCID: PMC1478174 DOI: 10.1038/sj.emboj.7601127] [Citation(s) in RCA: 139] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2005] [Accepted: 04/11/2006] [Indexed: 12/13/2022] Open
Abstract
Tetraploidy can result in cancer-associated aneuploidy. As shown here, freshly generated tetraploid cells arising due to mitotic slippage or failed cytokinesis are prone to undergo Bax-dependent mitochondrial membrane permeabilization and subsequent apoptosis. Knockout of Bax or overexpression of Bcl-2 facilitated the survival of tetraploid cells at least as efficiently as the p53 or p21 knockout. When tetraploid cells were derived from diploid p53 and Bax-proficient precursors, such cells exhibited an enhanced transcription of p53 target genes. Tetraploid cells exhibited an enhanced rate of spontaneous apoptosis that could be suppressed by inhibition of p53 or by knockdown of proapoptotic p53 target genes such as BBC3/Puma, GADD45A and ferredoxin reductase. Unexpectedly, tetraploid cells were more resistant to DNA damaging agents (cisplatin, oxaliplatin and camptothecin) than their diploid counterparts, and this difference disappeared upon inhibition of p53 or knockdown of p53-inducible ribonucleotide reductase. Tetraploid cells were also more resistant against UVC and gamma-irradiation. These data indicate the existence of p53-dependent alterations in apoptosis regulation in tetraploid cells.
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Affiliation(s)
- Maria Castedo
- CNRS, UMR8125, Institut Gustave Roussy, Villejuif, France
| | | | - Sonia Vivet
- CNRS, UMR8125, Institut Gustave Roussy, Villejuif, France
| | - Ilio Vitale
- CNRS, UMR8125, Institut Gustave Roussy, Villejuif, France
| | | | | | | | - Noelia Casares
- CNRS, UMR8125, Institut Gustave Roussy, Villejuif, France
| | - Alexandre Valent
- Unité de Génomique Fonctionnelle, Institut Gustave Roussy, Villejuif, France
| | | | - Elise Schmitt
- INSERM U-517, Faculty of Medicine and Pharmacy, Dijon, France
| | | | | | | | - Vladimir Lazar
- Unité de Génomique Fonctionnelle, Institut Gustave Roussy, Villejuif, France
| | - Carmen Garrido
- INSERM U-517, Faculty of Medicine and Pharmacy, Dijon, France
| | - Guido Kroemer
- CNRS, UMR8125, Institut Gustave Roussy, Villejuif, France
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28
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Vahsen N, Candé C, Dupaigne P, Giordanetto F, Kroemer RT, Herker E, Scholz S, Modjtahedi N, Madeo F, Le Cam E, Kroemer G. Physical interaction of apoptosis-inducing factor with DNA and RNA. Oncogene 2006; 25:1763-74. [PMID: 16278674 DOI: 10.1038/sj.onc.1209206] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [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: 01/18/2023]
Abstract
Apoptosis-inducing factor (AIF) is a mitochondrial flavoprotein, which upon apoptosis induction translocates to the nucleus where it interacts with DNA by virtue of positive charges clustered on the AIF surface. Here we show that the AIF interactome, as determined by mass spectroscopy, contains a large panel of ribonucleoproteins, which apparently bind to AIF through the RNA moiety. However, AIF is devoid of any detectable RNAse activity both in vitro and in vivo. Recombinant AIF can directly bind to DNA as well as to RNA. This binding can be visualized by electron microscopy, revealing that AIF can condense DNA, showing a preferential binding to single-stranded over double-stranded DNA. AIF also binds and aggregates single-stranded and structured RNA in vitro. Single-stranded poly A, poly G and poly C, as well double-stranded A/T and G/C RNA competed with DNA for AIF binding with a similar efficiency, thus corroborating a computer-calculated molecular model in which the binding site within AIF is the same for distinct nucleic acid species, without a clear sequence specificity. Among the preferred electron donors and acceptors of AIF, nicotine adenine dinucleotide phosphate (NADP) was particularly efficient in enhancing the generation of higher-order AIF/DNA and AIF/RNA complexes. Altogether, these data support a model in which a direct interaction of AIF contributes to the compaction of nucleic acids within apoptotic cells.
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Affiliation(s)
- N Vahsen
- Centre National de la Recherche Scientifique, UMR8125, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif, France
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29
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Modjtahedi N, Giordanetto F, Madeo F, Kroemer G. Apoptosis-inducing factor: vital and lethal. Trends Cell Biol 2006; 16:264-72. [PMID: 16621561 DOI: 10.1016/j.tcb.2006.03.008] [Citation(s) in RCA: 238] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2005] [Revised: 03/06/2006] [Accepted: 03/27/2006] [Indexed: 10/24/2022]
Abstract
Apoptosis-inducing factor (AIF) is a NADH oxidase with a local redox function that is essential for optimal oxidative phosphorylation and for an efficient anti-oxidant defense. The absence of AIF can cause neurodegeneration, skeleton muscle atrophy and dilated cardiomyopathy. In many models of apoptosis, AIF translocates to the nucleus, where it induces chromatin condensation and DNA degradation. The nuclear localization of AIF can be inhibited by blocking upstream signals of apoptosis. The contribution of AIF to cell death depends on the cell type and apoptotic insult and is only seen when caspases are inhibited or not activated. It is unknown to what extent and through which mechanisms AIF contributes to the induction of cell death. Here, we discuss recent progress in the quest to understand the contribution of AIF to life and death.
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Affiliation(s)
- Nazanine Modjtahedi
- Centre National de la Recherche Scientifique, FRE2939, Institut Gustave Roussy, PR1, 39 Rue Camille Desmoulins, F-94805 Villejuif, France
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Dubourg B, Kamphausen T, Weiwad M, Jahreis G, Feunteun J, Fischer G, Modjtahedi N. The human nuclear SRcyp is a cell cycle-regulated cyclophilin. J Biol Chem 2004; 279:22322-30. [PMID: 15016823 DOI: 10.1074/jbc.m400736200] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Cyclophilins of the Moca family (Cavarec, L., Kamphausen, T., Dubourg, B., Callebaut, I., Lemeunier, F., Metivier, D., Feunteun, J., Fischer, G., and Modjtahedi, N. (2002) J. Biol. Chem. 277, 41171-41182) are found only in organisms of the animal kingdom and share several structural and enzymatic features. The presence of serine/arginine (S/R) dipeptide repeats in their C-terminal tail suggests that these enzymes belong to the SR protein family involved in the regulation of gene expression. The function of this group of cyclophilins is currently unknown. However, their C-terminal tails contain a highly conserved polypeptide signature segment (the moca domain), which may well be involved in the functional regulation of these proteins. We report here the identification of five Cdc2-type phosphorylation sites gathered in and around the moca domain of SRcyp, a human cyclophilin belonging to the Moca family. The segment of SRcyp containing the identified sites is specifically phosphorylated in mitotic cells. This mitosis-specific phosphorylation was inhibited by treatment of the cells with roscovitine, a specific inhibitor of cyclin-dependent kinases, suggesting that the unknown activity of the moca domain of SRcyp requires mitotic regulation by the Cdc2-cyclin B kinase complex. The Cdc2-cyclin B complex was found to phosphorylate four of the five identified phosphorylation sites in vitro, providing further support for this possibility. Like many factors stored in nuclear speckles and involved in the regulation of gene expression, this nuclear cyclophilin displays a predominantly diffuse cytoplasmic distribution at the onset of mitosis. Only in late telophase is SRcyp recruited to the newly formed nuclei. The transit of SRcyp through mitotic interchromatin granule clusters, before re-entering the nucleus, suggests that the timing of the appearance of this cyclophilin in the telophasic nuclei is tightly coordinated with post-mitotic events. Human SRcyp is the first cell cycle-regulated cyclophilin to be described.
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Affiliation(s)
- Bérangère Dubourg
- Laboratoire de Génétique Oncologique-UMR8125, Institut Gustave Roussy-PR1, 39 Rue Camille Desmoulins, 94805 Villejuif Cedex, France
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31
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Cavarec L, Kamphausen T, Dubourg B, Callebaut I, Lemeunier F, Métivier D, Feunteun J, Fischer G, Modjtahedi N. Identification and characterization of Moca-cyp. A Drosophila melanogaster nuclear cyclophilin. J Biol Chem 2002; 277:41171-82. [PMID: 12154086 DOI: 10.1074/jbc.m203757200] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [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: 11/06/2022] Open
Abstract
Cyclophilins are enzymes catalyzing the cis-trans isomerization of peptidyl-prolyl bonds and belong to the enzyme class of peptidyl-prolyl cis-trans isomerases (PPIases), which includes two more families (FK506 binding proteins and parvulins). We report the characterization of a novel cyclophilin (Moca-cyp) isolated from Drosophila melanogaster. The single-copy Moca-cyp gene, which is localized on chromosome 3R, was cloned and sequenced. The sequence alignment of the gene against Moca-cyp cDNA allowed us to define its intron/exon structure and to identify a variant cDNA corresponding to an alternatively spliced mRNA. By embryo in situ RNA hybridization and immunostaining, we show that the expression of Moca-cyp is regulated during embryogenesis of Drosophila. The 120-kDa nuclear Moca-cyp protein belongs to a subfamily of large cyclophilins sharing structural and enzymatic features: their highly conserved N-terminal PPIase domain is extended by a positively charged and divergent C-terminal tail. Compared with cyclophilin 18, the enzymatic activity carried by the PPIase domain of Moca-cyp is low, exhibits characteristic substrate specificity, and shows a reduced sensitivity to the drug cyclosporin A (CsA). The reduced affinity for CsA is one of the typical features linking members of this subfamily and is probably the consequence of two amino acid substitutions within their active site. Another structural feature shared by members of this subfamily is a conserved polypeptidic segment ("moca" domain) that we report for the first time. The moca domain is located within the C-terminal tail and is the exclusive hallmark of a group of large cyclophilins found in multicellular organisms of the animal kingdom.
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Affiliation(s)
- Laurent Cavarec
- Laboratoire de Génétique Oncologique, UMR1599, Institut Gustave Roussy-PR1, 39 rue Camille Desmoulins, Villejuif 94805 cedex, France
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Castedo M, Roumier T, Blanco J, Ferri KF, Barretina J, Tintignac LA, Andreau K, Perfettini JL, Amendola A, Nardacci R, Leduc P, Ingber DE, Druillennec S, Roques B, Leibovitch SA, Vilella-Bach M, Chen J, Este JA, Modjtahedi N, Piacentini M, Kroemer G. Sequential involvement of Cdk1, mTOR and p53 in apoptosis induced by the HIV-1 envelope. EMBO J 2002; 21:4070-80. [PMID: 12145207 PMCID: PMC126138 DOI: 10.1093/emboj/cdf391] [Citation(s) in RCA: 117] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Syncytia arising from the fusion of cells expressing the HIV-1-encoded Env gene with cells expressing the CD4/CXCR4 complex undergo apoptosis following the nuclear translocation of mammalian target of rapamycin (mTOR), mTOR-mediated phosphorylation of p53 on Ser15 (p53(S15)), p53-dependent upregulation of Bax and activation of the mitochondrial death pathway. p53(S15) phosphorylation is only detected in syncytia in which nuclear fusion (karyogamy) has occurred. Karyogamy is secondary to a transient upregulation of cyclin B and a mitotic prophase-like dismantling of the nuclear envelope. Inhibition of cyclin-dependent kinase-1 (Cdk1) prevents karyogamy, mTOR activation, p53(S15) phosphorylation and apoptosis. Neutralization of p53 fails to prevent karyogamy, yet suppresses apoptosis. Peripheral blood mononuclear cells from HIV-1-infected patients exhibit an increase in cyclin B and mTOR expression, correlating with p53(S15) phosphorylation and viral load. Cdk1 inhibition prevents the death of syncytia elicited by HIV-1 infection of primary CD4 lymphoblasts. Thus, HIV-1 elicits a pro-apoptotic signal transduction pathway relying on the sequential action of cyclin B-Cdk1, mTOR and p53.
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Affiliation(s)
| | | | - Julià Blanco
- Centre National de la Recherche Scientifique, UMR1599, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif,
Unité de Pharmacochimie Moléculaire et Structurale, INSERM U266–CNRS UMR860, Université René Descartes (Paris V), F-75005 Paris, France, Institut de Recerca de la SIDA-Caixa, Laboratori de Retrovirologia, Hospital Universitari Germans Trias i Pujol, Universitat Autónoma de Barcelona, Ctra Canyet s/n, 08916 Badalona, Catalonia, Spain, Istituto Nazionale Malattie Infettive ‘L. Spallanzani’, Rome 00149, Department of Biology, University of Rome Tor Vergata, Rome 00133, Italy, Departments of Surgery and Pathology, Children’s Hospital and Harvard Medical School, Enders 1007, 300 Longwood Avenue, Boston, MA 02115 and Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA Corresponding author e-mail:
| | | | - Jordi Barretina
- Centre National de la Recherche Scientifique, UMR1599, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif,
Unité de Pharmacochimie Moléculaire et Structurale, INSERM U266–CNRS UMR860, Université René Descartes (Paris V), F-75005 Paris, France, Institut de Recerca de la SIDA-Caixa, Laboratori de Retrovirologia, Hospital Universitari Germans Trias i Pujol, Universitat Autónoma de Barcelona, Ctra Canyet s/n, 08916 Badalona, Catalonia, Spain, Istituto Nazionale Malattie Infettive ‘L. Spallanzani’, Rome 00149, Department of Biology, University of Rome Tor Vergata, Rome 00133, Italy, Departments of Surgery and Pathology, Children’s Hospital and Harvard Medical School, Enders 1007, 300 Longwood Avenue, Boston, MA 02115 and Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA Corresponding author e-mail:
| | | | | | | | - Alessandra Amendola
- Centre National de la Recherche Scientifique, UMR1599, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif,
Unité de Pharmacochimie Moléculaire et Structurale, INSERM U266–CNRS UMR860, Université René Descartes (Paris V), F-75005 Paris, France, Institut de Recerca de la SIDA-Caixa, Laboratori de Retrovirologia, Hospital Universitari Germans Trias i Pujol, Universitat Autónoma de Barcelona, Ctra Canyet s/n, 08916 Badalona, Catalonia, Spain, Istituto Nazionale Malattie Infettive ‘L. Spallanzani’, Rome 00149, Department of Biology, University of Rome Tor Vergata, Rome 00133, Italy, Departments of Surgery and Pathology, Children’s Hospital and Harvard Medical School, Enders 1007, 300 Longwood Avenue, Boston, MA 02115 and Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA Corresponding author e-mail:
| | - Roberta Nardacci
- Centre National de la Recherche Scientifique, UMR1599, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif,
Unité de Pharmacochimie Moléculaire et Structurale, INSERM U266–CNRS UMR860, Université René Descartes (Paris V), F-75005 Paris, France, Institut de Recerca de la SIDA-Caixa, Laboratori de Retrovirologia, Hospital Universitari Germans Trias i Pujol, Universitat Autónoma de Barcelona, Ctra Canyet s/n, 08916 Badalona, Catalonia, Spain, Istituto Nazionale Malattie Infettive ‘L. Spallanzani’, Rome 00149, Department of Biology, University of Rome Tor Vergata, Rome 00133, Italy, Departments of Surgery and Pathology, Children’s Hospital and Harvard Medical School, Enders 1007, 300 Longwood Avenue, Boston, MA 02115 and Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA Corresponding author e-mail:
| | - Philip Leduc
- Centre National de la Recherche Scientifique, UMR1599, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif,
Unité de Pharmacochimie Moléculaire et Structurale, INSERM U266–CNRS UMR860, Université René Descartes (Paris V), F-75005 Paris, France, Institut de Recerca de la SIDA-Caixa, Laboratori de Retrovirologia, Hospital Universitari Germans Trias i Pujol, Universitat Autónoma de Barcelona, Ctra Canyet s/n, 08916 Badalona, Catalonia, Spain, Istituto Nazionale Malattie Infettive ‘L. Spallanzani’, Rome 00149, Department of Biology, University of Rome Tor Vergata, Rome 00133, Italy, Departments of Surgery and Pathology, Children’s Hospital and Harvard Medical School, Enders 1007, 300 Longwood Avenue, Boston, MA 02115 and Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA Corresponding author e-mail:
| | - Donald E. Ingber
- Centre National de la Recherche Scientifique, UMR1599, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif,
Unité de Pharmacochimie Moléculaire et Structurale, INSERM U266–CNRS UMR860, Université René Descartes (Paris V), F-75005 Paris, France, Institut de Recerca de la SIDA-Caixa, Laboratori de Retrovirologia, Hospital Universitari Germans Trias i Pujol, Universitat Autónoma de Barcelona, Ctra Canyet s/n, 08916 Badalona, Catalonia, Spain, Istituto Nazionale Malattie Infettive ‘L. Spallanzani’, Rome 00149, Department of Biology, University of Rome Tor Vergata, Rome 00133, Italy, Departments of Surgery and Pathology, Children’s Hospital and Harvard Medical School, Enders 1007, 300 Longwood Avenue, Boston, MA 02115 and Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA Corresponding author e-mail:
| | - Sabine Druillennec
- Centre National de la Recherche Scientifique, UMR1599, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif,
Unité de Pharmacochimie Moléculaire et Structurale, INSERM U266–CNRS UMR860, Université René Descartes (Paris V), F-75005 Paris, France, Institut de Recerca de la SIDA-Caixa, Laboratori de Retrovirologia, Hospital Universitari Germans Trias i Pujol, Universitat Autónoma de Barcelona, Ctra Canyet s/n, 08916 Badalona, Catalonia, Spain, Istituto Nazionale Malattie Infettive ‘L. Spallanzani’, Rome 00149, Department of Biology, University of Rome Tor Vergata, Rome 00133, Italy, Departments of Surgery and Pathology, Children’s Hospital and Harvard Medical School, Enders 1007, 300 Longwood Avenue, Boston, MA 02115 and Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA Corresponding author e-mail:
| | - Bernard Roques
- Centre National de la Recherche Scientifique, UMR1599, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif,
Unité de Pharmacochimie Moléculaire et Structurale, INSERM U266–CNRS UMR860, Université René Descartes (Paris V), F-75005 Paris, France, Institut de Recerca de la SIDA-Caixa, Laboratori de Retrovirologia, Hospital Universitari Germans Trias i Pujol, Universitat Autónoma de Barcelona, Ctra Canyet s/n, 08916 Badalona, Catalonia, Spain, Istituto Nazionale Malattie Infettive ‘L. Spallanzani’, Rome 00149, Department of Biology, University of Rome Tor Vergata, Rome 00133, Italy, Departments of Surgery and Pathology, Children’s Hospital and Harvard Medical School, Enders 1007, 300 Longwood Avenue, Boston, MA 02115 and Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA Corresponding author e-mail:
| | | | - Montserrat Vilella-Bach
- Centre National de la Recherche Scientifique, UMR1599, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif,
Unité de Pharmacochimie Moléculaire et Structurale, INSERM U266–CNRS UMR860, Université René Descartes (Paris V), F-75005 Paris, France, Institut de Recerca de la SIDA-Caixa, Laboratori de Retrovirologia, Hospital Universitari Germans Trias i Pujol, Universitat Autónoma de Barcelona, Ctra Canyet s/n, 08916 Badalona, Catalonia, Spain, Istituto Nazionale Malattie Infettive ‘L. Spallanzani’, Rome 00149, Department of Biology, University of Rome Tor Vergata, Rome 00133, Italy, Departments of Surgery and Pathology, Children’s Hospital and Harvard Medical School, Enders 1007, 300 Longwood Avenue, Boston, MA 02115 and Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA Corresponding author e-mail:
| | - Jie Chen
- Centre National de la Recherche Scientifique, UMR1599, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif,
Unité de Pharmacochimie Moléculaire et Structurale, INSERM U266–CNRS UMR860, Université René Descartes (Paris V), F-75005 Paris, France, Institut de Recerca de la SIDA-Caixa, Laboratori de Retrovirologia, Hospital Universitari Germans Trias i Pujol, Universitat Autónoma de Barcelona, Ctra Canyet s/n, 08916 Badalona, Catalonia, Spain, Istituto Nazionale Malattie Infettive ‘L. Spallanzani’, Rome 00149, Department of Biology, University of Rome Tor Vergata, Rome 00133, Italy, Departments of Surgery and Pathology, Children’s Hospital and Harvard Medical School, Enders 1007, 300 Longwood Avenue, Boston, MA 02115 and Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA Corresponding author e-mail:
| | - José A. Este
- Centre National de la Recherche Scientifique, UMR1599, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif,
Unité de Pharmacochimie Moléculaire et Structurale, INSERM U266–CNRS UMR860, Université René Descartes (Paris V), F-75005 Paris, France, Institut de Recerca de la SIDA-Caixa, Laboratori de Retrovirologia, Hospital Universitari Germans Trias i Pujol, Universitat Autónoma de Barcelona, Ctra Canyet s/n, 08916 Badalona, Catalonia, Spain, Istituto Nazionale Malattie Infettive ‘L. Spallanzani’, Rome 00149, Department of Biology, University of Rome Tor Vergata, Rome 00133, Italy, Departments of Surgery and Pathology, Children’s Hospital and Harvard Medical School, Enders 1007, 300 Longwood Avenue, Boston, MA 02115 and Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA Corresponding author e-mail:
| | | | - Mauro Piacentini
- Centre National de la Recherche Scientifique, UMR1599, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif,
Unité de Pharmacochimie Moléculaire et Structurale, INSERM U266–CNRS UMR860, Université René Descartes (Paris V), F-75005 Paris, France, Institut de Recerca de la SIDA-Caixa, Laboratori de Retrovirologia, Hospital Universitari Germans Trias i Pujol, Universitat Autónoma de Barcelona, Ctra Canyet s/n, 08916 Badalona, Catalonia, Spain, Istituto Nazionale Malattie Infettive ‘L. Spallanzani’, Rome 00149, Department of Biology, University of Rome Tor Vergata, Rome 00133, Italy, Departments of Surgery and Pathology, Children’s Hospital and Harvard Medical School, Enders 1007, 300 Longwood Avenue, Boston, MA 02115 and Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA Corresponding author e-mail:
| | - Guido Kroemer
- Centre National de la Recherche Scientifique, UMR1599, Institut Gustave Roussy, 39 rue Camille-Desmoulins, F-94805 Villejuif,
Unité de Pharmacochimie Moléculaire et Structurale, INSERM U266–CNRS UMR860, Université René Descartes (Paris V), F-75005 Paris, France, Institut de Recerca de la SIDA-Caixa, Laboratori de Retrovirologia, Hospital Universitari Germans Trias i Pujol, Universitat Autónoma de Barcelona, Ctra Canyet s/n, 08916 Badalona, Catalonia, Spain, Istituto Nazionale Malattie Infettive ‘L. Spallanzani’, Rome 00149, Department of Biology, University of Rome Tor Vergata, Rome 00133, Italy, Departments of Surgery and Pathology, Children’s Hospital and Harvard Medical School, Enders 1007, 300 Longwood Avenue, Boston, MA 02115 and Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA Corresponding author e-mail:
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Lill NL, Tevethia MJ, Eckner R, Livingston DM, Modjtahedi N. p300 family members associate with the carboxyl terminus of simian virus 40 large tumor antigen. J Virol 1997; 71:129-37. [PMID: 8985331 PMCID: PMC191032 DOI: 10.1128/jvi.71.1.129-137.1997] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Several cellular polypeptides critical for growth regulation interact with DNA tumor virus oncoproteins. p400 is a cellular protein which binds to the adenovirus E1A oncoprotein(s). The biological function of p400 is not yet known, but it is structurally and immunologically closely related to p300 and CREB-binding protein, two known E1A-binding transcription adapters. Like p300, p400 is a phosphoprotein that binds to the simian virus 40 large tumor antigen (T). In anti-T coimmunoprecipitation experiments, staggered deletions spanning the amino-terminal 250 amino acids of T did not abrogate T binding to either p400 or p300. A T species composed of residues 251 to 708 bound both p400 and p300, while a T species defective in p53 binding was unable to bind either detectably. Anti-p53 immunoprecipitates prepared from cells containing wild-type T also contained p400 and p300. Hence, both p400 and p300 can bind (directly or indirectly) to a carboxyl-terminal fragment of T which contains its p53 binding domain. Since the p53 binding domain of T contributes to its immortalizing and transforming activities, T-p400 and/or T-p300 interactions may participate in these functions.
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Affiliation(s)
- N L Lill
- Division of Neoplastic Disease Mechanisms, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, USA
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Eckner R, Ludlow JW, Lill NL, Oldread E, Arany Z, Modjtahedi N, DeCaprio JA, Livingston DM, Morgan JA. Association of p300 and CBP with simian virus 40 large T antigen. Mol Cell Biol 1996; 16:3454-64. [PMID: 8668161 PMCID: PMC231340 DOI: 10.1128/mcb.16.7.3454] [Citation(s) in RCA: 204] [Impact Index Per Article: 7.3] [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: 02/01/2023] Open
Abstract
p300 and the CREB-binding protein CBP are two large nuclear phosphoproteins that are structurally highly related. Both function, in part, as transcriptional adapters and are targeted by the adenovirus E1A oncoprotein. We show here that p300 and CBP interact with another transforming protein, the simian virus 40 large T antigen (T). This interaction depends on the integrity of a region of T which is critical for its transforming and mitogenic properties and includes its LXCXE Rb-binding motif. T interferes with normal p300 and CBP function on at least two different levels. The presence of T alters the phosphorylation states of both proteins and inhibits their transcriptional activities on certain promoters. Although E1A and T show little sequence similarity, they interact with the same domain of p300 and CBP, suggesting that this region exhibits considerable flexibility in accommodating diverse protein ligands.
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Affiliation(s)
- R Eckner
- Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA
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Xiao ZX, Chen J, Levine AJ, Modjtahedi N, Xing J, Sellers WR, Livingston DM. Interaction between the retinoblastoma protein and the oncoprotein MDM2. Nature 1995; 375:694-8. [PMID: 7791904 DOI: 10.1038/375694a0] [Citation(s) in RCA: 433] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Inactivation of tumour-suppressor genes leads to deregulated cell proliferation and is a key factor in human tumorigenesis. Both p53 and retinoblastoma genes are frequently mutated in human cancers, and the simultaneous inactivation of RB and p53 is frequently observed in a variety of naturally occurring human tumours. Furthermore, three distinct DNA tumour virus groups--papovaviruses, adenoviruses and human papillomaviruses--transform cells by targeting and inactivating certain functions of both the p53 and retinoblastoma proteins. The cellular oncoprotein, Mdm2, binds to and downmodulates p53 function; its human homologue, MDM2, is amplified in certain human tumours, including sarcomas and gliomas. Overproduction of Mdm2 is both tumorigenic and capable of immortalizing primary rat embryo fibroblasts. Here we show that MDM2 interacts physically and functionally with pRB and, as with p53, inhibits pRB growth regulatory function. Therefore, both pRB and p53 can be subjected to negative regulation by the product of a single cellular protooncogene.
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Affiliation(s)
- Z X Xiao
- Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA
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Modjtahedi N, Haddada H, Lamonerie T, Lazar E, Lavialle C, Brison O. TGF-alpha production correlates with tumorigenicity in clones of the SW613-S human colon carcinoma cell line. Int J Cancer 1992; 52:483-90. [PMID: 1399125 DOI: 10.1002/ijc.2910520325] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [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: 12/26/2022]
Abstract
The c-myc gene is amplified and the c-Ki-ras gene is mutated in the SW613-S human colon carcinoma cell line. Two cell types with different levels of c-myc amplification are present in the SW613-S cell population and representative cell clones can be isolated. The clones with a high level of amplification and expression of the c-myc gene are tumorigenic in nude mice whereas those with a low level are not. The tumorigenic clones secrete transforming growth factor alpha (TGF-alpha) in the culture medium whereas the non-tumorigenic clones do not produce any detectable amount. Accordingly the level of TGF-alpha mRNA is higher and the transcription rate of the gene is increased in the tumorigenic clones. The acquisition of the tumorigenic phenotype by cells of non-tumorigenic clones, following introduction of c-myc gene copies by transfection, is accompanied by an increase in the steady-state level of TGF-alpha mRNA. These findings suggest a role for an elevated level of TGF-alpha production in the tumorigenic phenotype of SW613-S cells. The possibility that this role is indirect is discussed.
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Affiliation(s)
- N Modjtahedi
- Laboratoire d'Oncologie Moléculaire, URA 1158 CNRS, Institut Gustave Roussy, Villejuif, France
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Modjtahedi N, Frebourg T, Fossar N, Lavialle C, Cremisi C, Brison O. Increased expression of cytokeratin and ferritin-H genes in tumorigenic clones of the SW 613-S human colon carcinoma cell line. Exp Cell Res 1992; 201:74-82. [PMID: 1377134 DOI: 10.1016/0014-4827(92)90349-d] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Subclones of the SW 613-S human colon carcinoma cell line differ by their ability to induce tumors in nude mice and by their level of amplification of the c-myc gene. Clones with a high level of amplification are tumorigenic in nude mice whereas those with a low level are not. Genes overexpressed in the tumorigenic clones as compared to the nontumorigenic ones were searched by differential screening of a cDNA library. Two cDNA clones corresponding to cytokeratin K18 and ferritin-H chain were isolated. The steady state level of the corresponding mRNAs is higher in cells of all tumorigenic clones. The level of cytokeratin K8 mRNA, the specific partner of cytokeratin K18 in intermediate filaments of epithelial cells, is also elevated in these cells. For all three genes, this is mainly due to an increase in the transcription rate, as shown by a nuclear run-on assay. Immunoblotting experiments showed that cytokeratins K8, K18, and K19 are more abundant in cells of tumorigenic clones. The mRNA of the other subunit of apo-ferritin (ferritin-L chain) is expressed at the same level in both types of clones. The mRNAs of cytokeratins K18 and K8 and of ferritin-H chain are also overexpressed in cells of nontumorigenic clones which have acquired a tumorigenic phenotype after transfection of c-myc gene copies.
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Affiliation(s)
- N Modjtahedi
- Laboratoire d'Oncologie Moléculaire, UA 1158 CNRS, Institut Gustave Roussy, Villejuif, France
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Affiliation(s)
- M Volovitch
- Section de Biologie, Institut Curie, Paris, France
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Lavialle C, Modjtahedi N, Lamonerie T, Frebourg T, Landin RM, Fossar N, Lhomond G, Cassingena R, Brison O. The human breast carcinoma cell line SW 613-S: an experimental system to study tumor heterogeneity in relation to c-myc amplification, growth factor production and other markers (review). Anticancer Res 1989; 9:1265-79. [PMID: 2686529] [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: 01/02/2023]
Abstract
Amplification of the c-myc gene has been frequently reported in breast carcinomas. However the precise function of the c-myc protein is still unknown and the nature of the selective advantage offered to a cell by an overexpression of such a protein is unclear. We are addressing this question using the SW 613-S human breast carcinoma cell line as a model system. This cell line harbours an amplified c-myc gene and a mutated c-Ki-ras gene. By various criteria the amplified c-myc gene of SW613-S cells appears undistinguishable from a normal human c-myc gene. The SW613-S cell line is heterogeneous: it contains cells with a high level of amplification and carrying the extra copies of the c-myc gene in double minute chromosomes (DMs) and cells with few c-myc genes integrated into chromosomes. DM-containing cells are progressively lost upon in vitro cultivation but are selected for during in vivo growth, as tumors in nude mice, or by cultivating the cells in a chemically defined, serum-free medium or under conditions preventing anchorage. Clones with different levels of amplification and different chromosomal localization of the c-myc copies were isolated from the SW 613-S cell population. Those with a high level of amplification and expression of the c-myc gene are tumorigenic in nude mice, whereas those with a low level are not. Introduction of c-myc gene copies by transfection confers tumorigenicity to the nontumorigenic clones, indicating that a high level of amplification of the c-myc gene contributes to the tumorigenic phenotype of SW 613-S cells. Tumorigenic clones grow unattached, are able to proliferate in a chemically defined medium, and produce high levels of several growth factors (e.g. TGF-alpha, IGF2). Nontumorigenic clones are more dependent upon anchorage for growth, show a restricted growth in defined medium, and produce low or undetectable level of the growth factors tested. We have identified several genes, besides c-myc, the expression level of which is markedly different in the two types of clones. TGF-alpha, IGF2, PDGF-A, int-2, cytokeratins K8 and K18 and ferritin H chain are overexpressed in tumorigenic clones. In contrast, c-erbB1 (EGF receptor), c-jun, vimentin and p53 are expressed at a higher level in the nontumorigenic clones. Finally the major histocompatibility class I antigens, ferritin L chain, TGF-beta and c-Ki-ras, are examples of genes expressed at the same level in both types of clones.(ABSTRACT TRUNCATED AT 400 WORDS)
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Affiliation(s)
- C Lavialle
- Laboratoire d'Oncologie Moléculaire, UA 1158 CNRS, Institut Gustave Roussy, Villejuif, France
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Cherif D, Lavialle C, Modjtahedi N, Le Coniat M, Berger R, Brison O. Selection of cells with different chromosomal localizations of the amplified c-myc gene during in vivo and in vitro growth of the breast carcinoma cell line SW 613-S. Chromosoma 1989; 97:327-33. [PMID: 2707103 DOI: 10.1007/bf00371974] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The c-myc gene is amplified in the human breast carcinoma cell line SW 613-S. At early in vitro passages, the extra copies of the gene were mainly localized in double minute chromosomes (DMs), as shown by in situ hybridization with a biotinylated c-myc probe. However, cells without DMs were also present in which the c-myc genes were found integrated into any of several distinct chromosomes (mainly 7q+, 4 and 4q+, and 1). When this cell line was propagated in vitro, the level of c-myc amplification decreased because cells with DMs and a high amplification level were lost and replaced by cells without DMs and having a low amplification level. On the contrary, when early passage SW 613-S cells were grown in vivo, as subcutaneous tumours in nude mice, cells with numerous DMs and a high level of c-myc amplification were selected for. In one cell line (SW 613-Tu1) established from such a tumour, the DM-containing cells were substituted at late passages for cells with a high number of c-myc copies integrated within an abnormally banded region, at band 17q24 of a 17q+ chromosome. When only cells with integrated genes were present, this cell line was still highly tumorigenic indicating that the localization of the c-myc genes in DMs was not required for these cells to be tumorigenic in nude mice. Furthermore, cells of the secondary tumours induced by SW 613-Tu1 did not contain any DMs showing that in vivo growth did not promote the release of integrated c-myc copies into DMs.
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Affiliation(s)
- D Cherif
- Laboratoire de Cytogénétique, U301 INSERM and UM7 CNRS, Centre Hayem, Hôpital Saint-Louis, Paris, France
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Lavialle C, Modjtahedi N, Cassingena R, Brison O. High c-myc amplification level contributes to the tumorigenic phenotype of the human breast carcinoma cell line SW 613-S. Oncogene 1988; 3:335-9. [PMID: 3060796] [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: 01/03/2023]
Abstract
The c-myc gene is amplified in the SW 613-S cell line which was established from a human breast carcinoma. This line is heterogeneous: it contains cells with a high level of amplification and carrying the extra copies of the c-myc gene in double minute chromosomes (DMs) and cells with few c-myc genes integrated into chromosomes. Clones with different levels of amplification and different cytological localization of the c-myc copies were isolated from the SW 613-S cell population. Those with a high level of amplification and expression of the c-myc gene were highly tumorigenic in nude mice whereas those with a low level were not. Introduction of c-myc gene copies by transfection into the cells of several non-tumorigenic clones restored the tumorigenic phenotype. Our results indicate that a high level of amplification of the c-myc gene is a requirement for the tumorigenicity of SW 613-S cells in animals.
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Affiliation(s)
- C Lavialle
- ER 278 CNRS, Institut de Recherches Scientifiques sur le Cancer, Villejuif, France
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Abstract
The c-myc gene amplification observed in human tumors is likely to represent an activation mechanism aiming at an increased transcription level. In order to evaluate the biological significance of this amplification in the malignant transformation we have designed an experimental model that could possibly mimic this situation in vitro. We have constructed a series of plasmids which physically link the human c-myc gene to the bovine papilloma virus type 1 genome (BPV1) and therefore should be maintained as amplified episomes upon transformation of rodent cells. Anticipating that the high copy number will bring about the immortalizing capacity of the c-myc gene, the constructions were introduced into primary rat embryo cells. Immortal cell lines were established by transfection of the hybrid plasmids carrying either the complete BPV1 genome or the transforming region of the viral genome. The BPV1 DNA alone or the c-myc gene alone has no activity in this assay. The analysis of the established cell lines demonstrates that the transfected plasmids are present not as free copies as anticipated but rather integrated as tandem repeats. We present data which strongly suggest that the immortalization capacity of the hybrid plasmids reflects the activation of the c-myc gene by the transactivable BPV1 enhancer. Although both the BPV1 early genes and the c-myc gene are actively transcribed, most of the cell lines do not display a transformed phenotype.
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Affiliation(s)
- N Modjtahedi
- Laboratoire d'Oncologie Moléculaire, Institut Gustave Roussy, Villejuif, France
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Dron M, Modjtahedi N, Brison O, Tovey MG. Interferon modulation of c-myc expression in cloned Daudi cells: relationship to the phenotype of interferon resistance. Mol Cell Biol 1986; 6:1374-8. [PMID: 3785169 PMCID: PMC367660 DOI: 10.1128/mcb.6.5.1374-1378.1986] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Treatment of interferon-sensitive Daudi cell with electrophoretically pure human interferon alpha markedly reduced the level of c-myc mRNA, increased the level of class I histocompatibility antigen (HLA) mRNA, and did not affect the level of actin mRNA within the same cells. In contrast, the level of c-myc mRNA or HLA mRNA did not change significantly following interferon treatment in different clones of Daudi cells selected for resistance to the antiproliferative action of interferon. These cells possessed interferon receptors, however, and responded to interferon modulation of other genes, including 2',5' oligoisoadenylate synthetase (M. G. Tovey, M. Dron, K. E. Mogensen, B. Lebleu, N. Metchi, and J. Begon-Lours, Guymarho, J. Gen. Virol., 64:2649-2653, 1983; M. Dron, M. G. Tovey, and P. Eid, J. Gen. Virol., 66:787-795, 1985). A clone of interferon-resistant Daudi cells which had reverted to almost complete sensitivity to both the antiproliferative action of interferon and the interferon-enhanced expression of HLA mRNA remained refractory, however, to interferon modulation of c-myc expression, suggesting that a reduced level of c-myc mRNA may not be a prerequisite for inhibition of cell proliferation in interferon-treated cells. Our results do not exclude the possibility, however, that posttranscriptional modification(s) of c-myc expression may precede an inhibition of cell proliferation in interferon-treated cells.
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Modjtahedi N, Lavialle C, Poupon MF, Landin RM, Cassingena R, Monier R, Brison O. Increased level of amplification of the c-myc oncogene in tumors induced in nude mice by a human breast carcinoma cell line. Cancer Res 1985; 45:4372-9. [PMID: 4028021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Cell line SW 613-S, derived from a human breast carcinoma, contained double minute chromosomes (DMs) but lost them progressively upon in vitro cultivation. These cells were tumorigenic in nude mice. Cell lines were derived from the tumors and were found to have a high DM content. In three such cell lines, DMs were stably maintained upon in vitro cultivation, whereas in another they were progressively lost. We found that the c-myc oncogene is amplified 5- to 10-fold in SW 613-S and 20- to 90-fold in the different cell lines derived from the tumors. At least part of the additional c-myc copies were found associated with a purified DM fraction. In cell lines which lost the DMs during in vitro passages, the level of amplification was maintained. In situ hybridization experiments indicated that this loss was compensated by the acquisition of copies of the c-myc gene integrated into a chromosome. No major rearrangement of the amplified c-myc gene was detected. The amount of c-myc messenger RNAs is roughly proportional to the level of amplification. Our results indicate that growth of SW 613-S cells as tumors in nude mice selected cells with an increased level of amplification and expression of the c-myc oncogene.
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Abstract
Cauliflower mosaic virus (CaMV) is a plant DNA with an 8-kb circular double-stranded genome. CaMV-specific DNA and RNA molecules present in infected Brassica cells share some structural features with DNAs and RNAs of retroviruses and hepatitis B virus. This led to the hypothesis that CaMV replication occurs via reverse transcription of an RNA intermediate. Here we report the first characterization of a new DNA polymerase activity, specific to CaMV-infected tissues. A subcellular fraction of infected cells shows capacity to copy poly(C) and the heteropolymeric regions of natural mRNAs. Chromatographic isolation of the poly(C)-dependent activity clearly establishes that it is distinct from the classical gamma-like DNA polymerases previously described in plant cells. The significant homology observed between defined regions of the Moloney murine leukemia virus (MMLV) polymerase and CaMV unassigned gene V product favours the idea that the reverse transcriptase-like DNA polymerase detected in infected cells is a virus-encoded enzyme.
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Affiliation(s)
- M Volovitch
- Laboratoire de Biochimie, Section de Biologie, Institut Curie, 26 rue d'Ulm, 75231 Paris Cedex 05, France
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Bonneville JM, Volovitch M, Modjtahedi N, Demery D, Yot P. In vitro synthesis of cauliflower mosaic virus DNA in viroplasms. Adv Exp Med Biol 1984; 179:113-9. [PMID: 6524495 DOI: 10.1007/978-1-4684-8730-5_11] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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