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Zamarbide Losada JN, Sulpice E, Combe S, Almeida GS, Leach DA, Choo J, Protopapa L, Hamilton MP, McGuire S, Gidrol X, Bevan CL, Fletcher CE. Apoptosis-modulatory miR-361-3p as a novel treatment target in endocrine-responsive and endocrine-resistant breast cancer. J Endocrinol 2023; 256:e220229. [PMID: 36622663 PMCID: PMC9986394 DOI: 10.1530/joe-22-0229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 01/09/2023] [Indexed: 01/10/2023]
Abstract
Breast cancer (BC) is the most diagnosed cancer in women worldwide. In estrogen receptor (ER)-positive disease, anti-estrogens and aromatase inhibitors (AI) improve patient survival; however, many patients develop resistance. Dysregulation of apoptosis is a common resistance mechanism; thus, agents that can reinstate the activity of apoptotic pathways represent promising therapeutics for advanced drug-resistant disease. Emerging targets in this scenario include microRNAs (miRs). To identify miRs modulating apoptosis in drug-responsive and -resistant BC, a high-throughput miR inhibitor screen was performed, followed by high-content screening microscopy for apoptotic markers. Validation demonstrated that miR-361-3p inhibitor significantly increases early apoptosis and reduces proliferation of drug-responsive (MCF7), plus AI-/antiestrogen-resistant derivatives (LTED, TamR, FulvR), and ER- cells (MDA-MB-231). Importantly, proliferation-inhibitory effects were observed in vivo in a xenograft model, indicating the potential clinical application of miR-361-3p inhibition. RNA-seq of tumour xenografts identified FANCA as a direct miR-361-3p target, and validation suggested miR-361-3p inhibitor effects might be mediated in part through FANCA modulation. Moreover, miR-361-3p inhibition resulted in p53-mediated G1 cell cycle arrest through activation of p21 and reduced BC invasion. Analysis of publicly available datasets showed miR-361-3p expression is significantly higher in primary breast tumours vspaired normal tissue and is associated with decreased overall survival. In addition, miR-361-3p inhibitor treatment of BC patient explants decreased levels of miR-361-3p and proliferation marker, Ki67. Finally, miR-361-3p inhibitor showed synergistic effects on BC growth when combined with PARP inhibitor, Olaparib. Together, these studies identify miR-361-3p inhibitor as a potential new treatment for drug-responsive and -resistant advanced BC.
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Affiliation(s)
- J N Zamarbide Losada
- Imperial Centre for Translational and Experimental Medicine, Department of Surgery & Cancer, Imperial College London, Hammersmith Hospital, London, UK
| | - E Sulpice
- Université Grenoble Alpes, CEA, INSERM, BIG, BGE, Grenoble, France
| | - S Combe
- Université Grenoble Alpes, CEA, INSERM, BIG, BGE, Grenoble, France
| | - G S Almeida
- Imperial Centre for Translational and Experimental Medicine, Department of Surgery & Cancer, Imperial College London, Hammersmith Hospital, London, UK
| | - D A Leach
- Imperial Centre for Translational and Experimental Medicine, Department of Surgery & Cancer, Imperial College London, Hammersmith Hospital, London, UK
| | - J Choo
- Imperial Centre for Translational and Experimental Medicine, Department of Surgery & Cancer, Imperial College London, Hammersmith Hospital, London, UK
| | - L Protopapa
- Imperial Centre for Translational and Experimental Medicine, Department of Surgery & Cancer, Imperial College London, Hammersmith Hospital, London, UK
| | - M P Hamilton
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, USA
| | - S McGuire
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, USA
| | - X Gidrol
- Université Grenoble Alpes, CEA, INSERM, BIG, BGE, Grenoble, France
| | - C L Bevan
- Imperial Centre for Translational and Experimental Medicine, Department of Surgery & Cancer, Imperial College London, Hammersmith Hospital, London, UK
| | - C E Fletcher
- Imperial Centre for Translational and Experimental Medicine, Department of Surgery & Cancer, Imperial College London, Hammersmith Hospital, London, UK
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Fulbert C, Gaude C, Sulpice E, Chabardès S, Ratel D. P11.02 Hypothermia effect on glioblastoma cell viability, proliferation and migration. Neuro Oncol 2019. [DOI: 10.1093/neuonc/noz126.148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
BACKGROUND
Glioblastoma is the most common and aggressive primary brain tumor in adults. In spite of intensive treatment, patients have a poor prognosis with a median survival of 14–16 months. After surgical resection followed by postoperative chemoradiation (combined temozolomide treatment and radiotherapy), tumor recurs in the resection margin for more than 90% of patients. This recurrence results from the activation of residual glioblastoma cells beyond the resection cavity by therapy-induced injuries. To handle this issue, we propose therapeutic hypothermia as an adjuvant treatment, in order to place the resection margin in a state of hibernation. In fact, hypothermia was introduced as a promising therapeutic approach in various medical applications like cardiac arrest and pharmaco-resistant epilepsy. Only a few in vitro studies explored the effects of hypothermia on cancer cells and showed promising results. The aim of our work is to investigate the effects of hypothermia on glioblastoma cell proliferation and migration, two key cellular processes involved in cancer progression.
MATERIAL AND METHODS
We performed in vitro experiments on glioblastoma cell lines with different p53 status and various growth rates. For exploring the therapeutic potential of both mild and moderate hypothermia, we studied their impact on cell viability, proliferation and migration. We also performed cell cycle analysis by quantitation of DNA content using flow cytometry.
RESULTS
Results were similar for all glioblastoma cell lines, and demonstrated that cells were extremely sensitive to hypothermia. We showed that both mild and moderate hypothermia induced significant changes on glioblastoma cell lines behavior with a strong inhibition of cell proliferation and migration. Moderate hypothermia also affected glioblastoma cell viability and modified their distribution into the cell cycle phases.
CONCLUSION
Our results were comparable in all glioblastoma cell lines tested, demonstrating a consistent and universal effect of hypothermia. We showed that hypothermia significantly inhibits cell proliferation and migration, which are key processes involved in tumor growth. Proliferation arrest could be explained by the accumulation of cells in the G2/M phase of the cell cycle.
Together, these results support hypothermia as a promising adjuvant therapy for glioblastoma patients. Indeed, combined with current treatments, moderate hypothermia applied at the resection margin could prevent tumor recurrence after surgical resection. There is a crucial need to propose innovative glioblastoma treatments, and hypothermia appears as a promising therapeutic way.
SUPPORT
This work received financial support through grants from the Groupement des Entreprises Françaises de Lutte contre le Cancer (GEFLUC Grenoble - Dauphiné - Savoie) and the Fonds de dotation Clinatec.
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Affiliation(s)
- C Fulbert
- Univ. Grenoble Alpes, CEA, LETI, Clinatec, F-38000, Grenoble, France
| | - C Gaude
- Univ. Grenoble Alpes, CEA, LETI, Clinatec, F-38000, Grenoble, France
| | - E Sulpice
- Univ. Grenoble Alpes, CEA, INSERM, IRIG-BGE U1038, F-38000, Grenoble, France
| | - S Chabardès
- Univ. Grenoble Alpes, CEA, LETI, Clinatec, F-38000, Grenoble, France
- Neurosurgery Department, CHU Grenoble Alpes, F-38000, Grenoble, France
| | - D Ratel
- Univ. Grenoble Alpes, CEA, LETI, Clinatec, F-38000, Grenoble, France
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Agaësse G, Barbollat-Boutrand L, Sulpice E, Bhajun R, El Kharbili M, Berthier-Vergnes O, Degoul F, de la Fouchardière A, Berger E, Voeltzel T, Lamartine J, Gidrol X, Masse I. Erratum: A large-scale RNAi screen identifies LCMR1 as a critical regulator of Tspan8-mediated melanoma invasion. Oncogene 2017. [DOI: 10.1038/onc.2017.195] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Agaësse G, Barbollat-Boutrand L, Sulpice E, Bhajun R, El Kharbili M, Berthier-Vergnes O, Degoul F, de la Fouchardière A, Berger E, Voeltzel T, Lamartine J, Gidrol X, Masse I. A large-scale RNAi screen identifies LCMR1 as a critical regulator of Tspan8-mediated melanoma invasion. Oncogene 2017; 36:446-457. [PMID: 27375018 DOI: 10.1038/onc.2016.219] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 05/10/2016] [Accepted: 05/13/2016] [Indexed: 12/13/2022]
Abstract
Melanoma is the deadliest form of skin cancer owing to its proclivity to metastasise, and recently developed therapies have not yielded the expected results, because almost all patients relapse. Therefore, understanding the molecular mechanisms that underlie early invasion by melanoma cells is crucial to improving patient survival. We have previously shown that, whereas the Tetraspanin 8 protein (Tspan8) is undetectable in normal skin and benign lesions, its expression arises with the progression of melanoma and is sufficient to increase cell invasiveness. Therefore, to identify Tspan8 transcriptional regulators that could explain the onset of Tspan8 expression, thereby conferring an invasive phenotype, we performed an innovative RNA interference-based screen, which, for the first time, identified several Tspan8 repressors and activators, such as GSK3β, PTEN, IQGAP1, TPT1 and LCMR1. LCMR1 is a recently identified protein that is overexpressed in numerous carcinomas; its expression and role, however, had not previously been studied in melanoma. The present study identified Tspan8 as the first LCMR1 target that could explain its function in carcinogenesis. LCMR1 modulation was sufficient to positively regulate endogenous Tspan8 expression, with concomitant in vitro phenotypic changes such as loss of melanoma cell-matrix adherence and increase in invasion, and Tspan8 expression promoted tumourigenicity in vivo. Moreover, LCMR1 and Tspan8 overexpression were shown to correlate in melanoma lesions, and both proteins could be downregulated in vitro by vemurafenib. In conclusion, this study highlights the importance of Tspan8 and its regulators in the control of early melanoma invasion and suggests that they may be promising new therapeutic targets downstream of the RAF-MEK-ERK signalling pathway.
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Affiliation(s)
- G Agaësse
- Université de Lyon, Lyon, France
- Université Lyon 1, Lyon, France
- CNRS, UMR5534, Centre de Génétique et de Physiologie Moléculaires et Cellulaires, Villeurbanne, France
| | - L Barbollat-Boutrand
- Université de Lyon, Lyon, France
- Université Lyon 1, Lyon, France
- CNRS, UMR5534, Centre de Génétique et de Physiologie Moléculaires et Cellulaires, Villeurbanne, France
| | - E Sulpice
- Université Grenoble-Alpes, Grenoble, France
- CEA, BIG-BGE, Biomics, Grenoble, France
- Inserm, BGE, Grenoble, France
| | - R Bhajun
- Université Grenoble-Alpes, Grenoble, France
- CEA, BIG-BGE, Biomics, Grenoble, France
- Inserm, BGE, Grenoble, France
| | - M El Kharbili
- Université de Lyon, Lyon, France
- Université Lyon 1, Lyon, France
- CNRS, UMR5534, Centre de Génétique et de Physiologie Moléculaires et Cellulaires, Villeurbanne, France
| | - O Berthier-Vergnes
- Université de Lyon, Lyon, France
- Université Lyon 1, Lyon, France
- CNRS, UMR5534, Centre de Génétique et de Physiologie Moléculaires et Cellulaires, Villeurbanne, France
| | - F Degoul
- Clermont Université, Université d'Auvergne, Imagerie Moléculaire et Thérapie Vectorisée, BP, Clermont-Ferrand, France
- Inserm, U 990, Clermont-Ferrand, France
| | | | - E Berger
- Laboratoire CarMeN (INSERM 1060, INRA 1397, INSA), Université de Lyon, Lyon, France
| | - T Voeltzel
- Centre de Recherche en Cancérologie de Lyon, CNRS UMR5286, Inserm U1052, Université de Lyon, Université Lyon 1, Lyon, France
| | - J Lamartine
- Université de Lyon, Lyon, France
- Université Lyon 1, Lyon, France
- CNRS, UMR5534, Centre de Génétique et de Physiologie Moléculaires et Cellulaires, Villeurbanne, France
| | - X Gidrol
- Université Grenoble-Alpes, Grenoble, France
- CEA, BIG-BGE, Biomics, Grenoble, France
- Inserm, BGE, Grenoble, France
| | - I Masse
- Université de Lyon, Lyon, France
- Université Lyon 1, Lyon, France
- CNRS, UMR5534, Centre de Génétique et de Physiologie Moléculaires et Cellulaires, Villeurbanne, France
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Kesavan SV, Momey F, Cioni O, David-Watine B, Dubrulle N, Shorte S, Sulpice E, Freida D, Chalmond B, Dinten JM, Gidrol X, Allier C. High-throughput monitoring of major cell functions by means of lensfree video microscopy. Sci Rep 2014; 4:5942. [PMID: 25096726 PMCID: PMC5380008 DOI: 10.1038/srep05942] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [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] [Received: 05/12/2014] [Accepted: 07/17/2014] [Indexed: 11/22/2022] Open
Abstract
Quantification of basic cell functions is a preliminary step to understand complex cellular mechanisms, for e.g., to test compatibility of biomaterials, to assess the effectiveness of drugs and siRNAs, and to control cell behavior. However, commonly used quantification methods are label-dependent, and end-point assays. As an alternative, using our lensfree video microscopy platform to perform high-throughput real-time monitoring of cell culture, we introduce specifically devised metrics that are capable of non-invasive quantification of cell functions such as cell-substrate adhesion, cell spreading, cell division, cell division orientation and cell death. Unlike existing methods, our platform and associated metrics embrace entire population of thousands of cells whilst monitoring the fate of every single cell within the population. This results in a high content description of cell functions that typically contains 25,000 – 900,000 measurements per experiment depending on cell density and period of observation. As proof of concept, we monitored cell-substrate adhesion and spreading kinetics of human Mesenchymal Stem Cells (hMSCs) and primary human fibroblasts, we determined the cell division orientation of hMSCs, and we observed the effect of transfection of siCellDeath (siRNA known to induce cell death) on hMSCs and human Osteo Sarcoma (U2OS) Cells.
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Affiliation(s)
- S Vinjimore Kesavan
- 1] Univ. Grenoble Alpes, F-38000 Grenoble, France [2] CEA, LETI, MINATEC Campus, F-38054 Grenoble, France
| | - F Momey
- 1] Univ. Grenoble Alpes, F-38000 Grenoble, France [2] CEA, LETI, MINATEC Campus, F-38054 Grenoble, France
| | - O Cioni
- 1] Univ. Grenoble Alpes, F-38000 Grenoble, France [2] CEA, LETI, MINATEC Campus, F-38054 Grenoble, France
| | - B David-Watine
- Plateforme d'imagerie dynamique, Imagopole, Institut Pasteur, Paris, France
| | - N Dubrulle
- Plateforme d'imagerie dynamique, Imagopole, Institut Pasteur, Paris, France
| | - S Shorte
- Plateforme d'imagerie dynamique, Imagopole, Institut Pasteur, Paris, France
| | - E Sulpice
- 1] Univ. Grenoble Alpes, F-38000 Grenoble, France [2] CEA, iRTSV-Biologie à Grande Echelle, F-38054 Grenoble, France [3] INSERM, U1038, F-38054 Grenoble, France
| | - D Freida
- 1] Univ. Grenoble Alpes, F-38000 Grenoble, France [2] CEA, iRTSV-Biologie à Grande Echelle, F-38054 Grenoble, France [3] INSERM, U1038, F-38054 Grenoble, France
| | - B Chalmond
- 1] University of Cergy-Pontoise, France [2] CMLA, ENS Cachan, France
| | - J M Dinten
- 1] Univ. Grenoble Alpes, F-38000 Grenoble, France [2] CEA, LETI, MINATEC Campus, F-38054 Grenoble, France
| | - X Gidrol
- 1] Univ. Grenoble Alpes, F-38000 Grenoble, France [2] CEA, iRTSV-Biologie à Grande Echelle, F-38054 Grenoble, France [3] INSERM, U1038, F-38054 Grenoble, France [4]
| | - C Allier
- 1] Univ. Grenoble Alpes, F-38000 Grenoble, France [2] CEA, LETI, MINATEC Campus, F-38054 Grenoble, France [3]
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Sukkurwala AQ, Martins I, Wang Y, Schlemmer F, Ruckenstuhl C, Durchschlag M, Michaud M, Senovilla L, Sistigu A, Ma Y, Vacchelli E, Sulpice E, Gidrol X, Zitvogel L, Madeo F, Galluzzi L, Kepp O, Kroemer G. Immunogenic calreticulin exposure occurs through a phylogenetically conserved stress pathway involving the chemokine CXCL8. Cell Death Differ 2014; 21:59-68. [PMID: 23787997 PMCID: PMC3857625 DOI: 10.1038/cdd.2013.73] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 05/17/2013] [Accepted: 05/28/2013] [Indexed: 12/20/2022] Open
Abstract
The exposure of calreticulin (CRT) on the surface of stressed and dying cancer cells facilitates their uptake by dendritic cells and the subsequent presentation of tumor-associated antigens to T lymphocytes, hence stimulating an anticancer immune response. The chemotherapeutic agent mitoxantrone (MTX) can stimulate the peripheral relocation of CRT in both human and yeast cells, suggesting that the CRT exposure pathway is phylogenetically conserved. Here, we show that pheromones can act as physiological inducers of CRT exposure in yeast cells, thereby facilitating the formation of mating conjugates, and that a large-spectrum inhibitor of G protein-coupled receptors (which resemble the yeast pheromone receptor) prevents CRT exposure in human cancer cells exposed to MTX. An RNA interference screen as well as transcriptome analyses revealed that chemokines, in particular human CXCL8 (best known as interleukin-8) and its mouse ortholog Cxcl2, are involved in the immunogenic translocation of CRT to the outer leaflet of the plasma membrane. MTX stimulated the production of CXCL8 by human cancer cells in vitro and that of Cxcl2 by murine tumors in vivo. The knockdown of CXCL8/Cxcl2 receptors (CXCR1/Cxcr1 and Cxcr2) reduced MTX-induced CRT exposure in both human and murine cancer cells, as well as the capacity of the latter-on exposure to MTX-to elicit an anticancer immune response in vivo. Conversely, the addition of exogenous Cxcl2 increased the immunogenicity of dying cells in a CRT-dependent manner. Altogether, these results identify autocrine and paracrine chemokine signaling circuitries that modulate CRT exposure and the immunogenicity of cell death.
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Affiliation(s)
- A Q Sukkurwala
- INSERM, U848, Villejuif, France
- Institut Gustave Roussy, Villejuif, France
- Université Paris Sud/Paris XI, Le Kremlin Bicêtre, France
| | - I Martins
- INSERM, U848, Villejuif, France
- Institut Gustave Roussy, Villejuif, France
- Université Paris Sud/Paris XI, Le Kremlin Bicêtre, France
| | - Y Wang
- INSERM, U848, Villejuif, France
- Institut Gustave Roussy, Villejuif, France
- Université Paris Sud/Paris XI, Le Kremlin Bicêtre, France
| | - F Schlemmer
- INSERM, U848, Villejuif, France
- Institut Gustave Roussy, Villejuif, France
- Université Paris Sud/Paris XI, Le Kremlin Bicêtre, France
| | - C Ruckenstuhl
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - M Durchschlag
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - M Michaud
- INSERM, U848, Villejuif, France
- Institut Gustave Roussy, Villejuif, France
- Université Paris Sud/Paris XI, Le Kremlin Bicêtre, France
| | - L Senovilla
- Institut Gustave Roussy, Villejuif, France
- Université Paris Sud/Paris XI, Le Kremlin Bicêtre, France
- INSERM, U1015 Labellisée par la Ligue Nationale Contre le Cancer, Villejuif, France
| | - A Sistigu
- Institut Gustave Roussy, Villejuif, France
- Université Paris Sud/Paris XI, Le Kremlin Bicêtre, France
- INSERM, U1015 Labellisée par la Ligue Nationale Contre le Cancer, Villejuif, France
| | - Y Ma
- INSERM, U848, Villejuif, France
- Institut Gustave Roussy, Villejuif, France
- Université Paris Sud/Paris XI, Le Kremlin Bicêtre, France
| | - E Vacchelli
- INSERM, U848, Villejuif, France
- Institut Gustave Roussy, Villejuif, France
- Université Paris Sud/Paris XI, Le Kremlin Bicêtre, France
| | - E Sulpice
- Laboratoire Biologie à Grande Echelle, CEA, Grenoble, France
- INSERM, U1038, Université Joseph Fourier, Grenoble, France
| | - X Gidrol
- Laboratoire Biologie à Grande Echelle, CEA, Grenoble, France
- INSERM, U1038, Université Joseph Fourier, Grenoble, France
| | - L Zitvogel
- Institut Gustave Roussy, Villejuif, France
- Université Paris Sud/Paris XI, Le Kremlin Bicêtre, France
- INSERM, U1015 Labellisée par la Ligue Nationale Contre le Cancer, Villejuif, France
- Centre d'Investigation Clinique Biothérapie CICBT507, Institut Gustave Roussy, Villejuif, France
| | - F Madeo
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - L Galluzzi
- INSERM, U848, Villejuif, France
- Université Paris Descartes/Paris V, Sorbonne Paris Cité, Paris, France
| | - O Kepp
- INSERM, U848, Villejuif, France
- Institut Gustave Roussy, Villejuif, France
- Université Paris Sud/Paris XI, Le Kremlin Bicêtre, France
| | - G Kroemer
- INSERM, U848, Villejuif, France
- Université Paris Descartes/Paris V, Sorbonne Paris Cité, Paris, France
- Metabolomics Platform, Institut Gustave Roussy, Villejuif, France
- Equipe 11 Labellisée par la Ligue Nationale Contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
- Pôle de Biologie, Hôpital Européen Georges Pompidou, AP-HP, Paris, France
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Agaësse G, Barbollat-Boutrand L, Sulpice E, Combe S, Obeid P, Kharbili ME, Lamartine J, Gidrol X, Berthier-Vergnes O, Masse I. Identification des régulateurs transcriptionnels de la tétraspanine-8 dans l’invasion précoce du mélanome cutané. Ann Dermatol Venereol 2013. [DOI: 10.1016/j.annder.2013.09.596] [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: 10/26/2022]
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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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Lu M, Levin J, Sulpice E, Sequeira-Le Grand A, Alemany M, Caen JP, Han ZC. Effect of arsenic trioxide on viability, proliferation, and apoptosis in human megakaryocytic leukemia cell lines. Exp Hematol 1999; 27:845-52. [PMID: 10340400 DOI: 10.1016/s0301-472x(99)00014-4] [Citation(s) in RCA: 54] [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: 11/23/2022]
Abstract
Arsenic trioxide (As2O3) has been demonstrated to be effective for the treatment of acute promyelocytic leukemia (APL) and to inhibit proliferation and produce apoptosis in the APL cell line NB4. To determine if As2O3 might be useful for the treatment of other lineages, we investigated the effects of As2O3 on viability, proliferation, and induction of apoptosis in the megakaryocytic leukemia cell lines HEL, Meg-01, UT7, and M07e. Our results showed that As2O3, at concentrations of 0.1-2.0 microM, causes a dose- and time-dependent inhibition of survival and growth in all four megakaryocytic leukemia cell lines studied. In contrast, As2O3 at similar concentrations had no effects on either viability or growth of the nonmegakaryocytic leukemia cell line HL60 and two human breast cancer cell lines, ZR75 and MCF7. In situ end-labeling of DNA fragments (TUNEL assay) indicated that As2O3, at concentrations of 0.5-2 microM, could significantly induce apoptosis in the aforementioned four megakaryocytic leukemia cell lines, but not in the nonmegakaryocytic HL60, ZR75, and MCF7 cell lines. These results were confirmed using conventional morphologic assessment and the DNA ladder assay. Induction of apoptosis in arsenic-treated Meg-01 and UT7 cells was accompanied by a dose-response decrease of Bcl-2 protein, whereas As2O3 had no effect on this measurement in HL60, ZR75, and MCF7 cell lines. Pertinently, these concentrations of As2O3 produced identical changes in the characteristics of the APL cell line NB4. Collectively, these data demonstrate that As2O3 can selectively inhibit growth and induce apoptosis in megakaryocytic leukemia cell lines. The use of As2O3 for the treatment of malignant megakaryocytic disorders should be considered.
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Affiliation(s)
- M Lu
- Institut des Vaisseaux et du Sang, Hôpital Lariboisière, Paris, France
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Gulino D, Delachanal E, Concord E, Genoux Y, Morand B, Valiron MO, Sulpice E, Scaife R, Alemany M, Vernet T. Alteration of endothelial cell monolayer integrity triggers resynthesis of vascular endothelium cadherin. J Biol Chem 1998; 273:29786-93. [PMID: 9792693 DOI: 10.1074/jbc.273.45.29786] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.1] [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
Although cadherins appear to be necessary for proper cell-cell contacts, the physiological role of VE-cadherin (vascular endothelium cadherin) in adult tissue has not been clearly determined. To shed some light on this question, we have disturbed the adhesive function of VE-cadherin in human endothelial cell culture using a polyclonal anti-VE-cadherin antibody. This antibody disrupts confluent endothelial cell monolayers in vitro and transiently generates numerous gaps at cell-cell junctions. The formation of these gaps correlates with a reversible increase in the monolayer permeability. We present evidence that destruction of the homotypic interactions between the extracellular domains of VE-cadherin induces a rapid resynthesis of VE-cadherin, leading to restoration of endothelial cell-cell contacts. The expression of new molecules of VE-cadherin correlates with a modest but significant increase in VE-cadherin mRNA synthesis. Altogether, these results establish a critical role for VE-cadherin in the maintenance and restoration of endothelium integrity.
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Affiliation(s)
- D Gulino
- Laboratoire d'Ingénierie des Macromolécules, Institut de Biologie Structurale Jean-Pierre Ebel (Commissariat à l'Energie Atomique/CNRS), 41, Avenue des Martyrs, 38027 Grenoble Cedex, France.
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