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Bénéteau M, Daburon S, Moreau JF, Taupin JL, Legembre P. Editor's Note: Dominant-Negative Fas Mutation Is Reversed by Down-expression of c-FLIP. Cancer Res 2020; 80:363. [DOI: 10.1158/0008-5472.can-19-3174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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2
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Jing ZT, Liu W, Wu SX, He Y, Lin YT, Chen WN, Lin XJ, Lin X. Hepatitis B Virus Surface Antigen Enhances the Sensitivity of Hepatocytes to Fas-Mediated Apoptosis via Suppression of AKT Phosphorylation. THE JOURNAL OF IMMUNOLOGY 2018; 201:2303-2314. [PMID: 30171166 DOI: 10.4049/jimmunol.1800732] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 08/06/2018] [Indexed: 12/12/2022]
Abstract
The Fas receptor/ligand system plays a prominent role in hepatic apoptosis and hepatocyte death. Although hepatitis B virus (HBV) surface Ag (HBsAg) is the most abundant HBV protein in the liver and peripheral blood of patients with chronic HBV infection, its role in Fas-mediated hepatocyte apoptosis has not been disclosed. In this study, we report that HBsAg sensitizes HepG2 cells to agonistic anti-Fas Ab CH11-induced apoptosis through increasing the formation of SDS-stable Fas aggregation and procaspase-8 cleavage but decreasing both the expression of cellular FLIPL/S and the recruitment of FLIPL/S at the death-inducing signaling complex (DISC). Notably, HBsAg increased endoplasmic reticulum stress and consequently reduced AKT phosphorylation by deactivation of phosphoinositide-dependent kinase-1 (PDPK1) and mechanistic target of rapamycin complex 2 (mTORC2), leading to enhancement of Fas-mediated apoptosis. In a mouse model, expression of HBsAg in mice injected with recombinant adenovirus-associated virus 8 aggravated Jo2-induced acute liver failure, which could be effectively attenuated by the AKT activator SC79. Based on these results, it is concluded that HBsAg predisposes hepatocytes to Fas-mediated apoptosis and mice to acute liver failure via suppression of AKT prosurviving activity, suggesting that interventions directed at enhancing the activation or functional activity of AKT may be of therapeutic value in Fas-mediated progressive liver cell injury and liver diseases.
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Affiliation(s)
- Zhen-Tang Jing
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; and
| | - Wei Liu
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; and.,Key Laboratory of Tumor Microbiology, Department of Medical Microbiology, Fujian Medical University, Fuzhou 350004, China
| | - Shu-Xiang Wu
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; and
| | - Yun He
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; and
| | - Yan-Ting Lin
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; and
| | - Wan-Nan Chen
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; and.,Key Laboratory of Tumor Microbiology, Department of Medical Microbiology, Fujian Medical University, Fuzhou 350004, China
| | - Xin-Jian Lin
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; and
| | - Xu Lin
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; and .,Key Laboratory of Tumor Microbiology, Department of Medical Microbiology, Fujian Medical University, Fuzhou 350004, China
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3
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Maes M, Vinken M, Jaeschke H. Experimental models of hepatotoxicity related to acute liver failure. Toxicol Appl Pharmacol 2016; 290:86-97. [PMID: 26631581 PMCID: PMC4691574 DOI: 10.1016/j.taap.2015.11.016] [Citation(s) in RCA: 146] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 11/19/2015] [Accepted: 11/24/2015] [Indexed: 12/13/2022]
Abstract
Acute liver failure can be the consequence of various etiologies, with most cases arising from drug-induced hepatotoxicity in Western countries. Despite advances in this field, the management of acute liver failure continues to be one of the most challenging problems in clinical medicine. The availability of adequate experimental models is of crucial importance to provide a better understanding of this condition and to allow identification of novel drug targets, testing the efficacy of new therapeutic interventions and acting as models for assessing mechanisms of toxicity. Experimental models of hepatotoxicity related to acute liver failure rely on surgical procedures, chemical exposure or viral infection. Each of these models has a number of strengths and weaknesses. This paper specifically reviews commonly used chemical in vivo and in vitro models of hepatotoxicity associated with acute liver failure.
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Affiliation(s)
- Michaël Maes
- Department of In Vitro Toxicology and Dermato-Cosmetology, Vrije Universiteit Brussel, Brussels, Belgium
| | - Mathieu Vinken
- Department of In Vitro Toxicology and Dermato-Cosmetology, Vrije Universiteit Brussel, Brussels, Belgium.
| | - Hartmut Jaeschke
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, United States
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4
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Cuadrado-Castano S, Ayllon J, Mansour M, de la Iglesia-Vicente J, Jordan S, Tripathi S, García-Sastre A, Villar E. Enhancement of the proapoptotic properties of newcastle disease virus promotes tumor remission in syngeneic murine cancer models. Mol Cancer Ther 2015; 14:1247-58. [PMID: 25761895 DOI: 10.1158/1535-7163.mct-14-0913] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 03/02/2015] [Indexed: 12/19/2022]
Abstract
Newcastle disease virus (NDV) is considered a promising agent for cancer therapy due to its oncolytic properties. These include preferential replication in transformed cells, induction of innate and adaptive immune responses within tumors, and cytopathic effects in infected tumor cells due to the activation of apoptosis. To enhance the latter and thus possibly enhance the overall oncolytic activity of NDV, we generated a recombinant NDV encoding the human TNF receptor Fas (rNDV-B1/Fas). rNDV-B1/Fas replicates to similar titers as its wild-type (rNDV-B1) counterpart; however, overexpression of Fas in infected cells leads to higher levels of cytotoxicity correlated with faster and increased apoptosis responses, in which both the intrinsic and extrinsic pathways are activated earlier. Furthermore, in vivo studies in syngeneic murine melanoma models show an enhancement of the oncolytic properties of rNDV-B1/Fas, with major improvements in survival and tumor remission. Altogether, our data suggest that upregulation of the proapoptotic function of NDV is a viable approach to enhance its antitumor properties and adds to the currently known, rationally based strategies to design optimized therapeutic viral vectors for the treatment of cancer.
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Affiliation(s)
- Sara Cuadrado-Castano
- Department of Biochemistry and Molecular Biology, University of Salamanca, Salamanca, Spain. Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Juan Ayllon
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York. Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Mena Mansour
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, New York
| | | | - Stefan Jordan
- Department of Oncological Sciences, Immunology Institute and the Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Shashank Tripathi
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Adolfo García-Sastre
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York. Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, New York. Division of Infectious Disease, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York.
| | - Enrique Villar
- Department of Biochemistry and Molecular Biology, University of Salamanca, Salamanca, Spain
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5
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Vinken M, Maes M, Crespo Yanguas S, Willebrords J, Vanhaecke T, Rogiers V. Establishment and Characterization of an In Vitro Model of Fas-Mediated Hepatocyte Cell Death. Methods Mol Biol 2015; 1250:95-103. [PMID: 26272136 DOI: 10.1007/978-1-4939-2074-7_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Fas-mediated apoptosis underlies a plethora of liver pathologies and toxicities. As a consequence, this process is a major research topic in the field of experimental and clinical hepatology. The present chapter describes the setup of an in vitro model of hepatocellular apoptotic cell death. In essence, this system consists of freshly isolated hepatocytes cultured in a monolayer configuration, which are exposed to a combination of Fas ligand and cycloheximide. This in vitro model has been characterized by using a set of well-acknowledged cell death markers. This experimental system allows the study of the entire course of Fas-mediated hepatocellular cell death, going from early apoptosis to secondary necrosis, and hence can serve a broad range of in vitro pharmaco-toxicological purposes.
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Affiliation(s)
- Mathieu Vinken
- Department of In Vitro Toxicology and Dermato-Cosmetology, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090, Brussels, Belgium,
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6
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Primary hepatocytes and their cultures in liver apoptosis research. Arch Toxicol 2013; 88:199-212. [PMID: 24013573 DOI: 10.1007/s00204-013-1123-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Accepted: 08/29/2013] [Indexed: 01/18/2023]
Abstract
Apoptosis not only plays a key role in physiological demise of defunct hepatocytes, but is also associated with a plethora of acute and chronic liver diseases as well as with hepatotoxicity. The present paper focuses on the modelling of this mode of programmed cell death in primary hepatocyte cultures. Particular attention is paid to the activation of spontaneous apoptosis during the isolation of hepatocytes from the liver, its progressive manifestation upon the subsequent establishment of cell cultures and simultaneously to strategies to counteract this deleterious process. In addition, currently applied approaches to experimentally induce controlled apoptosis in this in vitro setting for mechanistic research purposes and thereby its detection using relevant biomarkers are reviewed.
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Daburon S, Devaud C, Costet P, Morello A, Garrigue-Antar L, Maillasson M, Hargous N, Lapaillerie D, Bonneu M, Dechanet-Merville J, Legembre P, Capone M, Moreau JF, Taupin JL. Functional characterization of a chimeric soluble Fas ligand polymer with in vivo anti-tumor activity. PLoS One 2013; 8:e54000. [PMID: 23326557 PMCID: PMC3541234 DOI: 10.1371/journal.pone.0054000] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Accepted: 12/07/2012] [Indexed: 12/21/2022] Open
Abstract
Binding of ligand FasL to its receptor Fas triggers apoptosis via the caspase cascade. FasL itself is homotrimeric, and a productive apoptotic signal requires that FasL be oligomerized beyond the homotrimeric state. We generated a series of FasL chimeras by fusing FasL to domains of the Leukemia Inhibitory Factor receptor gp190 which confer homotypic oligomerization, and analyzed the capacity of these soluble chimeras to trigger cell death. We observed that the most efficient FasL chimera, called pFasL, was also the most polymeric, as it reached the size of a dodecamer. Using a cellular model, we investigated the structure-function relationships of the FasL/Fas interactions for our chimeras, and we demonstrated that the Fas-mediated apoptotic signal did not solely rely on ligand-mediated receptor aggregation, but also required a conformational adaptation of the Fas receptor. When injected into mice, pFasL did not trigger liver injury at a dose which displayed anti-tumor activity in a model of human tumor transplanted to immunodeficient animals, suggesting a potential therapeutic use. Therefore, the optimization of the FasL conformation has to be considered for the development of efficient FasL-derived anti-cancer drugs targeting Fas.
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Affiliation(s)
- Sophie Daburon
- Unité Mixte de Recherche Centre National de la Recherche Scientifique 5164, Université de Bordeaux 2, Bordeaux, France
| | - Christel Devaud
- Unité Mixte de Recherche Centre National de la Recherche Scientifique 5164, Université de Bordeaux 2, Bordeaux, France
| | - Pierre Costet
- Animalerie spécialisée, Université de Bordeaux 2, Bordeaux, France
| | - Aurore Morello
- Unité Mixte de Recherche Centre National de la Recherche Scientifique 5164, Université de Bordeaux 2, Bordeaux, France
| | - Laure Garrigue-Antar
- Unité Mixte de Recherche Centre National de la Recherche Scientifique 7149, Université Paris-Est Créteil, Créteil, France
| | - Mike Maillasson
- Unité Mixte de Recherche Institut National de la Santé et de la Recherche Médicale 892, Université de Nantes, Nantes, France
| | - Nathalie Hargous
- Unité Mixte de Recherche Centre National de la Recherche Scientifique 5164, Université de Bordeaux 2, Bordeaux, France
| | | | - Marc Bonneu
- Centre génomique fonctionnelle, Université de Bordeaux 2, Bordeaux, France
| | - Julie Dechanet-Merville
- Unité Mixte de Recherche Centre National de la Recherche Scientifique 5164, Université de Bordeaux 2, Bordeaux, France
| | - Patrick Legembre
- Equipe Associée 4427, Institut de Recherche en Santé-Environnement-Travail, Université de Rennes 1, Rennes, France
| | - Myriam Capone
- Unité Mixte de Recherche Centre National de la Recherche Scientifique 5164, Université de Bordeaux 2, Bordeaux, France
| | - Jean-François Moreau
- Unité Mixte de Recherche Centre National de la Recherche Scientifique 5164, Université de Bordeaux 2, Bordeaux, France
- Laboratoire d'Immunologie et immunogénétique, Centre Hospitalier et Universitaire de Bordeaux, Bordeaux, France
| | - Jean-Luc Taupin
- Unité Mixte de Recherche Centre National de la Recherche Scientifique 5164, Université de Bordeaux 2, Bordeaux, France
- Laboratoire d'Immunologie et immunogénétique, Centre Hospitalier et Universitaire de Bordeaux, Bordeaux, France
- * E-mail:
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8
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Edmond V, Ghali B, Penna A, Taupin JL, Daburon S, Moreau JF, Legembre P. Precise mapping of the CD95 pre-ligand assembly domain. PLoS One 2012; 7:e46236. [PMID: 23049989 PMCID: PMC3457997 DOI: 10.1371/journal.pone.0046236] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Accepted: 08/29/2012] [Indexed: 11/18/2022] Open
Abstract
Pre-association of CD95 at the plasma membrane is mandatory for efficient death receptor signaling. This homotrimerization occurs through self-association of an extracellular domain called the pre-ligand assembly domain (PLAD). Using novel molecular and cellular tools, we confirmed that CD95-PLAD is necessary to promote CD95 multimerization and plays a pivotal role in the transmission of apoptotic signals. However, while a human CD95 mutant deleted of the previously described PLAD domain (amino acids 1 to 66) fails to interact with its wild-type counterpart and trigger autonomous cell death, deletion of amino acids 1 to 42 does not prevent homo- or hetero (human/mouse)-oligomerization of CD95, and thus does not alter transmission of the apoptotic signal. Overall, these findings indicate that the region between amino acids 43 to 66 corresponds to the minimal motif involved in CD95 homotypic interaction and is necessary to convey an efficient apoptotic signal. Interfering with this PLAD may represent a new therapeutic strategy for altering CD95-induced apoptotic and non-apoptotic signals.
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Affiliation(s)
- Valérie Edmond
- Université de Rennes-1, Rennes, France
- Inserm U1085, IRSET, Rennes, France
| | - Benoist Ghali
- Université de Bordeaux-2, Bordeaux, France
- CNRS UMR 5164, Bordeaux, France
| | - Aubin Penna
- Université de Rennes-1, Rennes, France
- Inserm U1085, IRSET, Rennes, France
| | - Jean-Luc Taupin
- Université de Bordeaux-2, Bordeaux, France
- CNRS UMR 5164, Bordeaux, France
- CHU Bordeaux, Place Amélie Raba Léon, Bordeaux, France
| | - Sophie Daburon
- Université de Bordeaux-2, Bordeaux, France
- CNRS UMR 5164, Bordeaux, France
| | - Jean-François Moreau
- Université de Bordeaux-2, Bordeaux, France
- CNRS UMR 5164, Bordeaux, France
- CHU Bordeaux, Place Amélie Raba Léon, Bordeaux, France
| | - Patrick Legembre
- Université de Rennes-1, Rennes, France
- Inserm U1085, IRSET, Rennes, France
- * E-mail:
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9
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Lafont E, Dupont R, Andrieu-Abadie N, Okazaki T, Schulze-Osthoff K, Levade T, Benoist H, Ségui B. Ordering of ceramide formation and caspase-9 activation in CD95L-induced Jurkat leukemia T cell apoptosis. Biochim Biophys Acta Mol Cell Biol Lipids 2012; 1821:684-93. [PMID: 22306364 DOI: 10.1016/j.bbalip.2012.01.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Revised: 01/03/2012] [Accepted: 01/18/2012] [Indexed: 11/19/2022]
Abstract
Ceramide, a biologically active sphingolipid in cell death signaling, accumulates upon CD95L treatment, concomitantly to apoptosis induction in Jurkat leukemia T cells. Herein, we show that ceramide did not increase in caspase-8 and -10-doubly deficient Jurkat cells in response to CD95L, indicating that apical caspases are essential for CD95L-triggered ceramide formation. Jurkat cells are typically defined as type 2 cells, which require the activation of the mitochondrial pathway for efficient apoptosis induction in response to CD95L. Caspase-9-deficient Jurkat cells significantly resisted CD95L-induced apoptosis, despite ceramide accumulation. Knock-down of sphingomyelin synthase 1, which metabolizes ceramide to sphingomyelin, enhanced (i) CD95L-triggered ceramide production, (ii) cytochrome c release from the mitochondria and (iii) caspase-9 activation. Exogenous ceramide-induced caspase-3 activation and apoptosis were impaired in caspase-9-deficient Jurkat cells. Conversely, caspase-9 re-expression in caspase-9-deficient Jurkat cells restored caspase-3 activation and apoptosis upon exogenous ceramide treatment. Collectively, our data provide genetic evidence that CD95L-triggered endogenous ceramide increase in Jurkat leukemia T cells (i) is not a mere consequence of cell death and occurs mainly in a caspase-9-independent manner, (ii) is likely involved in the pro-apoptotic mitochondrial pathway leading to caspase-9 activation.
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Affiliation(s)
- Elodie Lafont
- INSERM UMR1037, Centre de Recherches en Cancérologie de Toulouse, Equipe 4, BP84225, 31432 Toulouse Cedex 4, France
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10
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Abstract
Death receptors play a crucial role in immune surveillance and cellular homeostasis, two processes circumvented by tumor cells. CD95 (also termed Fas or APO1) is a transmembrane receptor, which belongs to the tumor necrosis factor receptor superfamily, and induces a potent apoptotic signal. Initial steps of the CD95 signal take place through protein/protein interactions that bring zymogens such as caspase-8 and caspase-10 closer. Aggregation of these procaspases leads to their autoprocessing, to the release of activated caspases in the cytosol, which causes a caspase cascade, and to the transmission of the apoptotic signal. In parallel, CD95 engagement drives an increase in the intracellular calcium concentration (Ca(2+))i whose origin and functions remain controversial. Although Ca(2+) ions play a central role in apoptosis/necrosis induction, recent studies have highlighted a protective role of Ca(2+) in death receptor signaling. In the light of these findings, we discuss the role of Ca(2+) ions as modulators of CD95 signaling.
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Tauzin S, Chaigne-Delalande B, Selva E, Khadra N, Daburon S, Contin-Bordes C, Blanco P, Le Seyec J, Ducret T, Counillon L, Moreau JF, Hofman P, Vacher P, Legembre P. The naturally processed CD95L elicits a c-yes/calcium/PI3K-driven cell migration pathway. PLoS Biol 2011; 9:e1001090. [PMID: 21713032 PMCID: PMC3119658 DOI: 10.1371/journal.pbio.1001090] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Accepted: 05/11/2011] [Indexed: 02/06/2023] Open
Abstract
Patients affected by chronic inflammatory disorders display high amounts of soluble CD95L. This homotrimeric ligand arises from the cleavage by metalloproteases of its membrane-bound counterpart, a strong apoptotic inducer. In contrast, the naturally processed CD95L is viewed as an apoptotic antagonist competing with its membrane counterpart for binding to CD95. Recent reports pinpointed that activation of CD95 may attract myeloid and tumoral cells, which display resistance to the CD95-mediated apoptotic signal. However, all these studies were performed using chimeric CD95Ls (oligomerized forms), which behave as the membrane-bound ligand and not as the naturally processed CD95L. Herein, we examine the biological effects of the metalloprotease-cleaved CD95L on CD95-sensitive activated T-lymphocytes. We demonstrate that cleaved CD95L (cl-CD95L), found increased in sera of systemic lupus erythematosus (SLE) patients as compared to that of healthy individuals, promotes the formation of migrating pseudopods at the leading edge of which the death receptor CD95 is capped (confocal microscopy). Using different migration assays (wound healing/Boyden Chamber/endothelial transmigration), we uncover that cl-CD95L promotes cell migration through a c-yes/Ca²⁺/PI3K-driven signaling pathway, which relies on the formation of a CD95-containing complex designated the MISC for Motility-Inducing Signaling Complex. These findings revisit the role of the metalloprotease-cleaved CD95L and emphasize that the increase in cl-CD95L observed in patients affected by chronic inflammatory disorders may fuel the local or systemic tissue damage by promoting tissue-filtration of immune cells.
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Affiliation(s)
- Sébastien Tauzin
- Université de Rennes-1, Rennes, France
- IRSET/EA-4427 SeRAIC, Rennes, France
| | | | - Eric Selva
- Université de Nice Sophia antipolis, INSERM ERI21/EA 4319, Nice, France
| | - Nadine Khadra
- Université de Rennes-1, Rennes, France
- IRSET/EA-4427 SeRAIC, Rennes, France
| | - Sophie Daburon
- CNRS UMR 5164, Bordeaux, France
- Université de Bordeaux-2, Bordeaux, France
| | - Cécile Contin-Bordes
- CNRS UMR 5164, Bordeaux, France
- Université de Bordeaux-2, Bordeaux, France
- CHU Bordeaux, Bordeaux, France
| | - Patrick Blanco
- CNRS UMR 5164, Bordeaux, France
- Université de Bordeaux-2, Bordeaux, France
- CHU Bordeaux, Bordeaux, France
| | - Jacques Le Seyec
- Université de Rennes-1, Rennes, France
- IRSET/EA-4427 SeRAIC, Rennes, France
| | - Thomas Ducret
- Université de Bordeaux-2, Bordeaux, France
- INSERM U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France
| | - Laurent Counillon
- Université de Nice-Sophia Antipolis, UMR 6097 Faculté des Sciences Parc Valrose, Nice, France
| | - Jean-François Moreau
- CNRS UMR 5164, Bordeaux, France
- Université de Bordeaux-2, Bordeaux, France
- CHU Bordeaux, Bordeaux, France
| | - Paul Hofman
- Université de Nice Sophia antipolis, INSERM ERI21/EA 4319, Nice, France
- CHU de Nice et Centre de Ressources Biologiques-Tumorothèque, Nice, France
| | - Pierre Vacher
- Université de Bordeaux-2, Bordeaux, France
- INSERM U916, Institut Bergonié, Bordeaux, France
| | - Patrick Legembre
- Université de Rennes-1, Rennes, France
- IRSET/EA-4427 SeRAIC, Rennes, France
- CNRS UMR 5164, Bordeaux, France
- Université de Bordeaux-2, Bordeaux, France
- * E-mail:
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12
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Esposito D, Sankar A, Morgner N, Robinson CV, Rittinger K, Driscoll PC. Solution NMR investigation of the CD95/FADD homotypic death domain complex suggests lack of engagement of the CD95 C terminus. Structure 2010; 18:1378-90. [PMID: 20947025 DOI: 10.1016/j.str.2010.08.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2010] [Revised: 07/20/2010] [Accepted: 08/13/2010] [Indexed: 11/26/2022]
Abstract
We have addressed complex formation between the death domain (DD) of the death receptor CD95 (Fas/APO-1) with the DD of immediate adaptor protein FADD using nuclear magnetic resonance (NMR) spectroscopy, mass spectrometry, and size-exclusion chromatography with in-line light scattering. We find complexation to be independent of the C-terminal 12 residues of CD95 and insensitive to mutation of residues that engage in the high-order clustering of CD95-DD molecules in a recently reported crystal structure obtained at pH 4. Differential NMR linewidths indicate that the C-terminal region of the CD95 chains remains in a disordered state and (13)C-methyl TROSY data are consistent with a lack of high degree of symmetry for the complex. The overall molecular mass of the complex is inconsistent with that in the crystal structure, and the complex dissociates at pH 4. We discuss these findings using sequence analysis of CD95 orthologs and the effect of FADD mutations on the interaction with CD95.
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Affiliation(s)
- Diego Esposito
- Division of Molecular Structure, MRC-National Institute for Medical Research, Mill Hill, London NW7 1AA, UK
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13
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A novel role of microtubular cytoskeleton in the dynamics of caspase-dependent Fas/CD95 death receptor complexes during apoptosis. FEBS Lett 2010; 584:1033-40. [DOI: 10.1016/j.febslet.2010.01.059] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2009] [Revised: 01/25/2010] [Accepted: 01/27/2010] [Indexed: 11/18/2022]
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14
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Sawai H, Domae N. Transfer of Fas (CD95) protein from the cell surface to the surface of polystyrene beads coated with anti-Fas antibody clone CH-11. Eur J Histochem 2010; 54:e8. [PMID: 20353915 PMCID: PMC3167295 DOI: 10.4081/ejh.2010.e8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2010] [Accepted: 01/12/2010] [Indexed: 11/23/2022] Open
Abstract
Mouse monoclonal anti-Fas (CD95) antibody clone CH-11 has been widely used in research on apoptosis. CH-11 has the ability to bind to Fas protein on cell surface and induce apoptosis. Here, we used polystyrene beads coated with CH-11 to investigate the role of lipid rafts in Fas-mediated apoptosis in SKW6.4 cells. Unexpectedly, by treatment of the cells with CH-11-coated beads Fas protein was detached from cell surface and transferred to the surface of CH-11-coated beads. Western blot analysis showed that Fas protein containing both extracellular and intracellular domains was attached to the beads. Fas protein was not transferred from the cells to the surface of the beads coated with other anti-Fas antibodies or Fas ligand. Similar phenomenon was observed in Jurkat T cells. Furthermore, CH-11-induced apoptosis was suppressed by pretreatment with CH-11-coated beads in Jurkat cells. These results suggest that CH-11 might possess distinct properties on Fas protein compared with other anti-Fas antibodies or Fas ligand, and also suggest that caution should be needed to use polystyrene beads coated with antibodies such as CH-11.
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Affiliation(s)
- Hirofumi Sawai
- Department of Internal Medicine, Osaka Dental University, Osaka, Japan.
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CD95 engagement mediates actin-independent and -dependent apoptotic signals. Cell Death Differ 2009; 16:1654-64. [DOI: 10.1038/cdd.2009.111] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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16
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Morgan MJ, Kim YS, Liu ZG. Membrane-bound Fas ligand requires RIP1 for efficient activation of caspase-8 within the death-inducing signaling complex. THE JOURNAL OF IMMUNOLOGY 2009; 183:3278-84. [PMID: 19641134 DOI: 10.4049/jimmunol.0803428] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The serine-threonine kinase RIP1 was originally identified through its ability to bind to the death domain of Fas (CD95). RIP1 has been shown to be recruited to the Fas death-inducing signaling complex (DISC) and is required for the induction of necrotic cell death. In this study, we show that in Jurkat T lymphocytes, RIP1 is also necessary for the most efficient activation of downstream caspases by Fas when treated with membrane-bound Fas ligand, but not with agonistic Abs or cross-linked soluble Fas ligand. RIP1 participates in the Fas-associated death domain protein-mediated recruitment of caspase-8 to the Fas receptor complex in a manner that promotes caspase-8 activation. Cross-linking Abs, such as CH11, bypass the requirement for RIP1 in caspase activation by initiating larger, though less efficient, DISC complexes, while membrane-bound Fas ligand initiates a smaller but more efficient DISC that functions, in part, by effectively incorporating more RIP1 into the complex. Consequently, RIP1 is likely a more integral part of physiological signaling through the Fas/CD95 receptor complex than previously recognized; at least when the signal is mediated by full-length membrane-bound FasL. Cross-linked soluble FasL, which also occurs physiologically, behaves similarly to the CH11 Ab, and may therefore be more likely to initiate nonapoptotic Fas signaling due to less RIP1 in the receptor complex. Thus, agonists that bind the same Fas receptor initiate mechanistically distinct pathways resulting in differential cytotoxicity.
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Affiliation(s)
- Michael J Morgan
- Cell and Cancer Biology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
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Fauchais AL, Lalloué F, Lise MC, Boumediene A, Preud'homme JL, Vidal E, Jauberteau MO. Role of endogenous brain-derived neurotrophic factor and sortilin in B cell survival. THE JOURNAL OF IMMUNOLOGY 2008; 181:3027-38. [PMID: 18713973 DOI: 10.4049/jimmunol.181.5.3027] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Brain-derived neurotrophic factor (BDNF), a major neuronal growth factor, is also known to exert an antiapoptotic effect in myeloma cells. Whereas BDNF secretion was described in B lymphocytes, the ability of B cells to produce sortilin, its transport protein, was not previously reported. We studied BDNF production and the expression of its receptors, tyrosine protein kinase receptor B and p75 neurotrophin receptor in the human pre-B, mature, and plasmacytic malignant B cell lines under normal and stress culture conditions (serum deprivation, Fas activation, or their combination). BDNF secretion was enhanced by serum deprivation and exerted an antiapoptotic effect, as demonstrated by neutralization experiments with antagonistic Ab. The precursor form, pro-BDNF, also secreted by B cells, decreases under stress conditions in contrast to BDNF production. Stress conditions induced the membranous expression of p75 neurotrophin receptor and tyrosine protein kinase receptor B, maximal in mature B cells, contrasting with the sequestration of both receptors in normal culture. By blocking Ab and small interfering RNA, we evidenced that BDNF production and its survival function are depending on sortilin, a protein regulating neurotrophin transport in neurons, which was not previously described in B cells. Therefore, in mature B cell lines, an autocrine BDNF production is up-regulated by stress culture conditions and exerts a modulation of apoptosis through the sortilin pathway. This could be of importance to elucidate certain drug resistances of malignant B cells. In addition, primary B lymphocytes contained sortilin and produced BDNF after mitogenic activation, which suggests that sortilin and BDNF might be implicated in the survival and activation of normal B cells also.
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Chapter Four Methods to Analyze the Palmitoylated CD95 High Molecular Weight Death‐Inducing Signaling Complex. Methods Enzymol 2008. [DOI: 10.1016/s0076-6879(08)01404-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Wieckowski S, Trouche N, Chaloin O, Guichard G, Fournel S, Hoebeke J. Cooperativity in the interaction of synthetic CD40L mimetics with CD40 and its implication in cell signaling. Biochemistry 2007; 46:3482-93. [PMID: 17319699 DOI: 10.1021/bi602434a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
CD40 ligand (CD40L) and CD40 are members of the tumor necrosis factor (TNF) and TNF receptor superfamilies, respectively. Their interaction is crucial for the development of a proper immune response. Intervention on this pathway provides an important ground for new treatments targeting autoimmune diseases or helping to fight infection and cancer. We have recently reported on the structure-based design of synthetic molecules with C3 symmetry, named mini-CD40Ls, that can effectively mimic homotrimeric soluble CD40L. Here we show that substitution of a D-prolyl residue for the glycyl within the Lys-Gly-Tyr-Tyr CD40-binding motif leads to a complete loss of cooperativity in the interaction of the mimetic with its cognate receptor as assessed by surface plasmon resonance experiments. The ability of the modified mini-CD40L to induce apoptosis on both human and murine lymphoma cells was not affected by this mutation. However, it was unable to induce the NF-kappaB pathway in the mouse D1 dendritic cell line, which is essential for its complete maturation, but still activated production of IL-12 p40 mRNA. These differential effects might be partly explained by the change in rigidity of the CD40 recognition element. In this study, we not only point out the consequences of the abrogation of the cooperative property in a ligand-receptor interaction on downstream cellular events but also demonstrate the usefulness of synthetic multivalent ligands in dissecting the complex mechanisms implicated in the signalosome.
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Affiliation(s)
- Sébastien Wieckowski
- CNRS UPR 9021, Immunologie et Chimie Thérapeutiques, Institut de Biologie Moléculaire et Cellulaire, 15 rue René Descartes, 67084 Strasbourg, France
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Bénéteau M, Daburon S, Moreau JF, Taupin JL, Legembre P. Dominant-negative Fas mutation is reversed by down-expression of c-FLIP. Cancer Res 2007; 67:108-15. [PMID: 17210689 DOI: 10.1158/0008-5472.can-06-1415] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Fas triggering by agonistic antibodies or by its cognate ligand, FasL, induces apoptotic cell death, whereas mutation in the Fas death domain is associated with lymphoma progression. On prolonged culture in the presence of an agonistic anti-Fas antibody, we raised a Jurkat cell line resistant to agonistic antibodies but still sensitive to soluble FasL, which carried at the heterozygous state, a point mutation into the Fas death domain. Down-modulation of c-FLIP expression reversed the blockade of the Fas pathway. We show that the activation threshold for the Fas receptor is more easily overcome by multimeric FasL than by agonistic antibodies and that the increase of this threshold due to mutation in the Fas death domain can be overcome by acting on a downstream effector of the Fas signal, c-FLIP. These findings put forward a new approach to eradicate Fas-resistant tumor cells.
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Affiliation(s)
- Marie Bénéteau
- Laboratoire Composantes Innées de la Réponse Immunitaire et Différenciation, Centre National de la Recherche Scientifique UMR 5164, University of Bordeaux 2, 146 rue Léo Saignat, 33076 Bordeaux, France
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Feig C, Tchikov V, Schütze S, Peter ME. Palmitoylation of CD95 facilitates formation of SDS-stable receptor aggregates that initiate apoptosis signaling. EMBO J 2006; 26:221-31. [PMID: 17159907 PMCID: PMC1782382 DOI: 10.1038/sj.emboj.7601460] [Citation(s) in RCA: 120] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2006] [Accepted: 10/31/2006] [Indexed: 01/15/2023] Open
Abstract
Apoptosis signaling through CD95 (Fas/APO-1) involves aggregation and clustering of the receptor followed by its actin-dependent internalization. Internalization is required for efficient formation of the death-inducing signaling complex (DISC) with maximal recruitment of FADD, caspase-8/10 and c-FLIP occurring when the receptor has reached an endosomal compartment. The first detectable event during CD95 signaling is the formation of SDS-stable aggregates likely reflecting intense oligomerization of the receptor. We now demonstrate that these SDS-stable forms of CD95 correspond to very high molecular weight DISC complexes (hiDISC) and are the sites of caspase-8 activation. hiDISCs are found both inside and outside of detergent-resistant membranes. The formation of SDS-stable CD95 aggregates involves palmitoylation of the membrane proximal cysteine 199 in CD95. Cysteine 199 mutants no longer form SDS-stable aggregates, and inhibition of palmitoylation reduces internalization of CD95 and activation of caspase-8. Our data demonstrate that SDS-stable forms of CD95 are the sites of apoptosis initiation and represent an important early step in apoptosis signaling through CD95 before activation of caspases.
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Affiliation(s)
- Christine Feig
- The Ben May Institute for Cancer Research, University of Chicago, Chicago, IL, USA
| | - Vladimir Tchikov
- Institute of Immunology, University Hospital of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Stefan Schütze
- Institute of Immunology, University Hospital of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Marcus E Peter
- The Ben May Institute for Cancer Research, University of Chicago, Chicago, IL, USA
- The Ben May Institute for Cancer Research, University of Chicago, 924 East 57th Street, Chicago, IL 60637, USA. Tel.: +1 773 702 4728; Fax: +1 773 702 3701; E-mail:
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Lautrette C, Loum-Ribot E, Petit D, Vermot-Desroches C, Wijdenes J, Jauberteau MO. Increase of Fas-induced apoptosis by inhibition of extracellular phosphorylation of Fas receptor in Jurkat cell line. Apoptosis 2006; 11:1195-204. [PMID: 16699962 DOI: 10.1007/s10495-006-6795-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Apoptosis signalling through the Fas pathway requires several steps of aggregation of the Fas receptor in the membrane, including aggregation that may occur in the absence of Fas ligand. Association of Fas domains is determinant to signal transmission following Fas ligand binding to a specific domain. The domains involved in Fas aggregation are located in its extracellular region and contain three potential protein kinase C-binding motifs. We therefore studied the possibility that phosphorylation of the extracellular region of Fas might be implicated in the regulation of Fas-mediated apoptosis. Inhibition experiments of extracellular phosphorylation were performed in human Jurkat T leukemia cells with K252b, an impermeant protein-kinase inhibitor. Extracellular phosphorylation of Fas receptor was related to ecto-kinase, as assessed by the [gamma-(32)P] ATP labelling of Fas-116 kDa aggregates, suppressed by K252b inhibitor which significantly increased the sensitivity to Fas-mediated apoptosis. Ecto-PKC involvement was demonstrated by bisindolylmaleimide VIII, a selective inhibitor of protein kinase C which significantly increased both Fas aggregation in the membrane and Fas-mediated apoptosis and by the addition of the PKC pseudo-substrate 19-36 which inhibited the phosphorylation of 116 kDa Fas aggregates. These data support a role for Fas phosphorylation in the decreased sensitivity to apoptosis in the Jurkat T leukemia cell line.
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Affiliation(s)
- C Lautrette
- Laboratory of Immunology and EA 3842, University Hospital, 2 avenue Martin Luther King, 87042 Limoges, France
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Henkler F, Behrle E, Dennehy KM, Wicovsky A, Peters N, Warnke C, Pfizenmaier K, Wajant H. The extracellular domains of FasL and Fas are sufficient for the formation of supramolecular FasL-Fas clusters of high stability. ACTA ACUST UNITED AC 2005; 168:1087-98. [PMID: 15795317 PMCID: PMC2171833 DOI: 10.1083/jcb.200501048] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Using fluorescent variants of Fas and FasL, we show that membrane FasL and Fas form supramolecular clusters that are of flexible shape, but nevertheless stable and persistent. Membrane FasL-induced Fas clusters were formed in caspase-8- or FADD-deficient cells or when a cytoplasmic deletion mutant of Fas was used suggesting that cluster formation is independent of the assembly of the cytoplasmic Fas signaling complex and downstream activated signaling pathways. In contrast, cross-linked soluble FasL failed to aggregate the cytoplasmic deletion mutant of Fas, but still induced aggregation of signaling competent full-length Fas. Moreover, membrane FasL-induced Fas cluster formation occurred in the presence of the lipid raft destabilizing component methyl-beta-cyclodextrin, whereas Fas aggregation by soluble FasL was blocked. Together, these data suggest that the extracellular domains of Fas and FasL alone are sufficient to drive membrane FasL-induced formation of supramolecular Fas-FasL complexes, whereas soluble FasL-induced Fas aggregation is dependent on lipid rafts and mechanisms associated with the intracellular domain of Fas.
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Affiliation(s)
- Frank Henkler
- Department of Molecular Internal Medicine, Medical Polyclinic, University of Wuerzburg, 97070 Wuerzburg, Germany
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Abstract
AbstractAttempts at inducing allograft immune privilege by enforced Fas ligand expression have shown accelerated rejection mediated by neutrophils. While it has been proposed that Fas ligand was directly chemotactic toward neutrophils, several lines of evidence argue for an indirect recruitment mechanism. This question was addressed by using in vitro migration assays that used highly purified human leukocyte subsets. Granulocytes did not migrate in response to Fas engagement and required the presence of T cells expressing several natural killer (NK) cell markers. These rare CD8 memory T cells expressed T and NK cell markers and were not restricted to CD1d, showing that they are distinct from conventional natural killer T (NKT) cells. These cells were able to kill both NK-sensitive and -insensitive targets and secreted several CC and CXC chemokines active toward granulocytes, monocytes, and NK cells upon Fas engagement. Chemotactic factor release depended on caspase activity, in the absence of NKT cell apoptosis. The ability of CD1d-unrestricted NKT cells to recruit innate immune system cells might play a role in cancer cell eradication and contribute to inflammatory diseases.
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Affiliation(s)
- Martin Giroux
- Institut National de Recherche et de Sécurité-Institut Armand-Frappier, Laval, QC, Canada
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