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Urresti J, Ruiz-Meana M, Coccia E, Arévalo JC, Castellano J, Fernández-Sanz C, Galenkamp KMO, Planells-Ferrer L, Moubarak RS, Llecha-Cano N, Reix S, García-Dorado D, Barneda-Zahonero B, Comella JX. Lifeguard Inhibits Fas Ligand-mediated Endoplasmic Reticulum-Calcium Release Mandatory for Apoptosis in Type II Apoptotic Cells. J Biol Chem 2015; 291:1221-34. [PMID: 26582200 DOI: 10.1074/jbc.m115.677682] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Indexed: 12/29/2022] Open
Abstract
Death receptors are members of the tumor necrosis factor receptor superfamily involved in the extrinsic apoptotic pathway. Lifeguard (LFG) is a death receptor antagonist mainly expressed in the nervous system that specifically blocks Fas ligand (FasL)-induced apoptosis. To investigate its mechanism of action, we studied its subcellular localization and its interaction with members of the Bcl-2 family proteins. We performed an analysis of LFG subcellular localization in murine cortical neurons and found that LFG localizes mainly to the ER and Golgi. We confirmed these results with subcellular fractionation experiments. Moreover, we show by co-immunoprecipitation experiments that LFG interacts with Bcl-XL and Bcl-2, but not with Bax or Bak, and this interaction likely occurs in the endoplasmic reticulum. We further investigated the relationship between LFG and Bcl-XL in the inhibition of apoptosis and found that LFG protects only type II apoptotic cells from FasL-induced death in a Bcl-XL dependent manner. The observation that LFG itself is not located in mitochondria raises the question as to whether LFG in the ER participates in FasL-induced death. Indeed, we investigated the degree of calcium mobilization after FasL stimulation and found that LFG inhibits calcium release from the ER, a process that correlates with LFG blockage of cytochrome c release to the cytosol and caspase activation. On the basis of our observations, we propose that there is a required step in the induction of type II apoptotic cell death that involves calcium mobilization from the ER and that this step is modulated by LFG.
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Affiliation(s)
- Jorge Urresti
- From the Cell Signaling and Apoptosis Group and the Institut de Neurociències, Departament de Bioquímica i Biologia Molecular, Facultat de Medicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Marisol Ruiz-Meana
- Laboratory of Experimental Cardiology, Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron, 08035 Barcelona, Spain
| | | | - Juan Carlos Arévalo
- the Department of Cell Biology and Pathology, Instituto de Neurociencias de Castilla y León, Universidad de Salamanca, Salamanca 37007, Spain, and the Institute of Biomedical Research of Salamanca, Salamanca 37007, Spain
| | - José Castellano
- Laboratory of Experimental Cardiology, Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron, 08035 Barcelona, Spain
| | - Celia Fernández-Sanz
- Laboratory of Experimental Cardiology, Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron, 08035 Barcelona, Spain
| | | | - Laura Planells-Ferrer
- From the Cell Signaling and Apoptosis Group and the Institut de Neurociències, Departament de Bioquímica i Biologia Molecular, Facultat de Medicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | | | | | | | - David García-Dorado
- Laboratory of Experimental Cardiology, Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron, 08035 Barcelona, Spain
| | - Bruna Barneda-Zahonero
- From the Cell Signaling and Apoptosis Group and the Institut de Neurociències, Departament de Bioquímica i Biologia Molecular, Facultat de Medicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain,
| | - Joan X Comella
- From the Cell Signaling and Apoptosis Group and the Institut de Neurociències, Departament de Bioquímica i Biologia Molecular, Facultat de Medicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain,
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Vacher P, Vacher AM, Pineau R, Latour S, Soubeyran I, Pangault C, Tarte K, Soubeyran P, Ducret T, Bresson-Bepoldin L. Localized Store-Operated Calcium Influx Represses CD95-Dependent Apoptotic Effects of Rituximab in Non-Hodgkin B Lymphomas. THE JOURNAL OF IMMUNOLOGY 2015. [PMID: 26202984 DOI: 10.4049/jimmunol.1402942] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The anti-CD20 mAb, rituximab, is routinely used to treat B cell malignancies. However, a majority of patients relapse. An improvement in the complete response was obtained by combining rituximab with chemotherapy, at the cost of increased toxicity. We reported that rituximab induced the colocalization of both the Orai1 Ca(2+) release-activated Ca(2+) channel (CRAC) and the endoplasmic reticulum Ca(2+) sensor stromal interaction molecule 1 with CD20 and CD95 into a cluster, eliciting a polarized store-operated Ca(2+) entry (SOCE). We observed that blocking this Ca(2+) entry with downregulation of Orai1, pharmacological inhibitors, or reducing calcemia with hypocalcemic drugs sensitized human B lymphoma cell lines and primary human lymphoma cells to rituximab-induced apoptosis in vitro, and improved the antitumoral effect of rituximab in xenografted mice. This revealed that Ca(2+) entry exerted a negative feedback loop on rituximab-induced apoptosis, suggesting that associating CRAC channel inhibitors or hypocalcemic agents with rituximab may improve the treatment of patients with B cell malignancies. The calcium-dependent proteins involved in this process appear to vary according to the B lymphoma cell type, suggesting that CRAC-channel targeting is likely to be more efficient than calcium-dependent protein targeting.
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Affiliation(s)
- Pierre Vacher
- Institut Bergonié, Centre de Lutte contre le Cancer, F-33076 Bordeaux Cedex, France; Université de Bordeaux, F-33076 Bordeaux Cedex, France; INSERM U916 Validation et Identification de Nouvelles Cibles en Oncologie, F-33076 Bordeaux Cedex, France;
| | - Anne-Marie Vacher
- Institut Bergonié, Centre de Lutte contre le Cancer, F-33076 Bordeaux Cedex, France; Université de Bordeaux, F-33076 Bordeaux Cedex, France; INSERM U916 Validation et Identification de Nouvelles Cibles en Oncologie, F-33076 Bordeaux Cedex, France
| | - Raphael Pineau
- Animalerie Mutualisée, Université de Bordeaux, F33400 Talence, France
| | - Simon Latour
- Institut Bergonié, Centre de Lutte contre le Cancer, F-33076 Bordeaux Cedex, France; Université de Bordeaux, F-33076 Bordeaux Cedex, France; INSERM U916 Validation et Identification de Nouvelles Cibles en Oncologie, F-33076 Bordeaux Cedex, France
| | - Isabelle Soubeyran
- Institut Bergonié, Centre de Lutte contre le Cancer, F-33076 Bordeaux Cedex, France; Université de Bordeaux, F-33076 Bordeaux Cedex, France; INSERM U916 Validation et Identification de Nouvelles Cibles en Oncologie, F-33076 Bordeaux Cedex, France
| | - Celine Pangault
- INSERM, Unité Mixte de Recherche 917, F-35043 Rennes, France; Université de Rennes 1, F-35043 Rennes, France; Centre Hospitalier Universitaire Pontchaillou, F-35033 Rennes, France
| | - Karin Tarte
- INSERM, Unité Mixte de Recherche 917, F-35043 Rennes, France; Université de Rennes 1, F-35043 Rennes, France; Centre Hospitalier Universitaire Pontchaillou, F-35033 Rennes, France
| | - Pierre Soubeyran
- Institut Bergonié, Centre de Lutte contre le Cancer, F-33076 Bordeaux Cedex, France; Université de Bordeaux, F-33076 Bordeaux Cedex, France; INSERM U916 Validation et Identification de Nouvelles Cibles en Oncologie, F-33076 Bordeaux Cedex, France
| | - Thomas Ducret
- Université de Bordeaux, F-33076 Bordeaux Cedex, France; Centre de Recherche Cardio-Thoracique de Bordeaux, F-33076 Bordeaux Cedex, France; and INSERM, U1045, F-33076 Bordeaux Cedex, France
| | - Laurence Bresson-Bepoldin
- Institut Bergonié, Centre de Lutte contre le Cancer, F-33076 Bordeaux Cedex, France; Université de Bordeaux, F-33076 Bordeaux Cedex, France; INSERM U916 Validation et Identification de Nouvelles Cibles en Oncologie, F-33076 Bordeaux Cedex, France;
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Hu Q, Cui X, Tao L, Xiu L, Wang T, Wang X. Staphylococcus aureusInduces Apoptosis in Primary Bovine Mammary Epithelial Cells Through Fas-FADD Death Receptor-Linked Caspase-8 Signaling. DNA Cell Biol 2014; 33:388-97. [DOI: 10.1089/dna.2013.2195] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Qingliang Hu
- College of Life Sciences, Inner Mongolia University, Hohhot, People's Republic of China
| | - Xinjie Cui
- College of Life Sciences, Inner Mongolia University, Hohhot, People's Republic of China
| | - Lin Tao
- College of Life Sciences, Inner Mongolia University, Hohhot, People's Republic of China
| | - Lei Xiu
- College of Life Sciences, Inner Mongolia University, Hohhot, People's Republic of China
| | - Ting Wang
- College of Life Sciences, Inner Mongolia University, Hohhot, People's Republic of China
| | - Xiao Wang
- College of Life Sciences, Inner Mongolia University, Hohhot, People's Republic of China
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Abstract
Cell shrinkage is a hallmark and contributes to signaling of apoptosis. Apoptotic cell shrinkage requires ion transport across the cell membrane involving K(+) channels, Cl(-) or anion channels, Na(+)/H(+) exchange, Na(+),K(+),Cl(-) cotransport, and Na(+)/K(+)ATPase. Activation of K(+) channels fosters K(+) exit with decrease of cytosolic K(+) concentration, activation of anion channels triggers exit of Cl(-), organic osmolytes, and HCO3(-). Cellular loss of K(+) and organic osmolytes as well as cytosolic acidification favor apoptosis. Ca(2+) entry through Ca(2+)-permeable cation channels may result in apoptosis by affecting mitochondrial integrity, stimulating proteinases, inducing cell shrinkage due to activation of Ca(2+)-sensitive K(+) channels, and triggering cell-membrane scrambling. Signaling involved in the modification of cell-volume regulatory ion transport during apoptosis include mitogen-activated kinases p38, JNK, ERK1/2, MEKK1, MKK4, the small G proteins Cdc42, and/or Rac and the transcription factor p53. Osmosensing involves integrin receptors, focal adhesion kinases, and tyrosine kinase receptors. Hyperosmotic shock leads to vesicular acidification followed by activation of acid sphingomyelinase, ceramide formation, release of reactive oxygen species, activation of the tyrosine kinase Yes with subsequent stimulation of CD95 trafficking to the cell membrane. Apoptosis is counteracted by mechanisms involved in regulatory volume increase (RVI), by organic osmolytes, by focal adhesion kinase, and by heat-shock proteins. Clearly, our knowledge on the interplay between cell-volume regulatory mechanisms and suicidal cell death is still far from complete and substantial additional experimental effort is needed to elucidate the role of cell-volume regulatory mechanisms in suicidal cell death.
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Affiliation(s)
- Florian Lang
- Institute of Physiology, University of Tübingen, Tübingen, Germany
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Chen YF, Yang JS, Chang WS, Tsai SC, Peng SF, Zhou YR. Houttuynia cordata Thunb extract modulates G0/G1 arrest and Fas/CD95-mediated death receptor apoptotic cell death in human lung cancer A549 cells. J Biomed Sci 2013; 20:18. [PMID: 23506616 PMCID: PMC3610241 DOI: 10.1186/1423-0127-20-18] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2012] [Accepted: 03/13/2013] [Indexed: 02/06/2023] Open
Abstract
Background Houttuynia cordata Thunb (HCT) is commonly used in Taiwan and other Asian countries as an anti-inflammatory, antibacterial and antiviral herbal medicine. In this study, we investigated the anti-human lung cancer activity and growth inhibition mechanisms of HCT in human lung cancer A549 cells. Results In order to investigate effects of HCT on A549 cells, MTT assay was used to evaluate cell viability. Flow cytometry was employed for cell cycle analysis, DAPI staining, and the Comet assay was used for DNA fragmentation and DNA condensation. Western blot analysis was used to analyze cell cycle and apoptotic related protein levels. HCT induced morphological changes including cell shrinkage and rounding. HCT increased the G0/G1 and Sub-G1 cell (apoptosis) populations and HCT increased DNA fragmentation and DNA condensation as revealed by DAPI staining and the Comet assay. HCT induced activation of caspase-8 and caspase-3. Fas/CD95 protein levels were increased in HCT-treated A549 cells. The G0/G1 phase and apoptotic related protein levels of cyclin D1, cyclin A, CDK 4 and CDK 2 were decreased, and p27, caspase-8 and caspase-3 were increased in A549 cells after HCT treatment. Conclusions The results demonstrated that HCT-induced G0/G1 phase arrest and Fas/CD95-dependent apoptotic cell death in A549 cells
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Affiliation(s)
- Yuh-Fung Chen
- Department of Pharmacology, College of Medicine, China Medical University, No 91, Hsueh-Shih Road, Taichung 40402, Taiwan.
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Rapold RA, Wueest S, Knoepfel A, Schoenle EJ, Konrad D. Fas activates lipolysis in a Ca2+-CaMKII-dependent manner in 3T3-L1 adipocytes. J Lipid Res 2012; 54:63-70. [PMID: 23089915 DOI: 10.1194/jlr.m028035] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Fas (CD95) is a member of the tumor necrosis factor (TNF) receptor superfamily and plays a crucial role in the induction of apoptosis. However, like TNF, Fas can induce nonapoptotic signaling pathways. We previously demonstrated that mice lacking Fas specifically in adipocytes are partly protected from diet-induced insulin resistance, potentially via decreased delivery of FAs to the liver, as manifested by lower total liver ceramide content. In the present study, we aimed to delineate the signaling pathway involved in Fas-mediated adipocyte lipid mobilization. Treatment of differentiated 3T3-L1 adipocytes with membrane-bound Fas ligand (FasL) significantly increased lipolysis after 12 h without inducing apoptosis. In parallel, Fas activation increased phosphorylation of ERK1/2, and FasL-induced lipolysis was blunted in the presence of the ERK-inhibitor U0126 or in ERK1/2-depleted adipocytes. Furthermore, Fas activation increased phosphorylation of the Ca(2+)/calmodulin-dependent protein kinases II (CaMKII), and blocking of the CaMKII-pathway (either by the Ca(2+) chelator BAPTA or by the CaMKII inhibitor KN62) blunted FasL-induced ERK1/2 phosphorylation and glycerol release. In conclusion, we propose a novel role for CaMKII in promoting lipolysis in adipocytes.
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Affiliation(s)
- Reto A Rapold
- Division of Pediatric Endocrinology and Diabetology, University Children's Hospital, CH-8032 Zurich, Switzerland
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ORAI-mediated calcium influx in T cell proliferation, apoptosis and tolerance. Cell Calcium 2011; 50:261-9. [DOI: 10.1016/j.ceca.2011.05.015] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2011] [Revised: 05/12/2011] [Accepted: 05/13/2011] [Indexed: 12/25/2022]
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