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Jubelin C, Muñoz-Garcia J, Ollivier E, Cochonneau D, Vallette F, Heymann MF, Oliver L, Heymann D. Identification of MCM4 and PRKDC as new regulators of osteosarcoma cell dormancy based on 3D cell cultures. Biochim Biophys Acta Mol Cell Res 2024; 1871:119660. [PMID: 38216092 DOI: 10.1016/j.bbamcr.2024.119660] [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] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 12/15/2023] [Accepted: 01/03/2024] [Indexed: 01/14/2024]
Abstract
Dormancy is a potential way for tumors to develop drug resistance and escape treatment. However, the mechanisms involved in cancer dormancy remain poorly understood. This is mainly because there is no in vitro culture model making it possible to spontaneously induce dormancy. In this context, the present work proposes the use of three-dimensional (3D) spheroids developed from osteosarcoma cell lines as a relevant model for studying cancer dormancy. MNNG-HOS, SaOS-2, 143B, MG-63, U2OS and SJSA-1 cell lines were cultured in 3D using the Liquid Overlay Technique (LOT). Dormancy was studied by staining cancer cells with a lipophilic dye (DiD), and long-term DiD+ cells were considered as dormant cancer cells. The role of the extracellular matrix in inducing dormancy was investigated by embedding cells into methylcellulose or Geltrex™. Gene expression of DiD+ cells was assessed with a Nanostring™ approach and the role of the genes detected in dormancy was validated by a transient down-expression model using siRNA treatment. Proliferation was measured using fluorescence microscopy and the xCELLigence technology. We observed that MNNG-HOS, 143B and MG-G3 cell lines had a reduced proliferation rate in 3D compared to 2D. U2OS cells had an increased proliferation rate when they were cultured in Geltrex™ compared to other 3D culture methods. Using 3D cultures, a transcriptomic signature of dormancy was obtained and showed a decreased expression of 18 genes including ETV4, HELLS, ITGA6, MCM4, PRKDC, RAD21 and UBE2T. The treatment with siRNA targeting these genes showed that cancer cell proliferation was reduced when the expression of ETV4 and MCM4 were decreased, whereas proliferation was increased when the expression of RAD21 was decreased. 3D culture facilitates the maintenance of dormant cancer cells characterized by a reduced proliferation and less differential gene expression as compared to proliferative cells. Further studies of the genes involved has enabled us to envisage their role in regulating cell proliferation.
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Affiliation(s)
- Camille Jubelin
- Nantes Université, CNRS, US2B, UMR 6286, 44000 Nantes, France; Institut de Cancérologie de l'Ouest, Tumor Heterogeneity and Precision Medicine Lab., 44805 Saint-Herblain, France; Atlantic Bone Screen, 44800 Saint-Herblain, France
| | - Javier Muñoz-Garcia
- Nantes Université, CNRS, US2B, UMR 6286, 44000 Nantes, France; Institut de Cancérologie de l'Ouest, Tumor Heterogeneity and Precision Medicine Lab., 44805 Saint-Herblain, France
| | - Emilie Ollivier
- Institut de Cancérologie de l'Ouest, Tumor Heterogeneity and Precision Medicine Lab., 44805 Saint-Herblain, France
| | - Denis Cochonneau
- Institut de Cancérologie de l'Ouest, Tumor Heterogeneity and Precision Medicine Lab., 44805 Saint-Herblain, France
| | - François Vallette
- Institut de Cancérologie de l'Ouest, Tumor Heterogeneity and Precision Medicine Lab., 44805 Saint-Herblain, France; Nantes Université, INSERM, CRCI(2)NA, UMR1307, 44000 Nantes, France
| | - Marie-Françoise Heymann
- Nantes Université, CNRS, US2B, UMR 6286, 44000 Nantes, France; Institut de Cancérologie de l'Ouest, Tumor Heterogeneity and Precision Medicine Lab., 44805 Saint-Herblain, France
| | - Lisa Oliver
- Nantes Université, INSERM, CRCI(2)NA, UMR1307, 44000 Nantes, France; CHU de Nantes, Nantes, France
| | - Dominique Heymann
- Nantes Université, CNRS, US2B, UMR 6286, 44000 Nantes, France; Institut de Cancérologie de l'Ouest, Tumor Heterogeneity and Precision Medicine Lab., 44805 Saint-Herblain, France; Department of Oncology and Metabolism, Medical School, University of Sheffield, Sheffield, UK.
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Pu Y, Li L, Peng H, Liu L, Heymann D, Robert C, Vallette F, Shen S. Drug-tolerant persister cells in cancer: the cutting edges and future directions. Nat Rev Clin Oncol 2023; 20:799-813. [PMID: 37749382 DOI: 10.1038/s41571-023-00815-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/25/2023] [Indexed: 09/27/2023]
Abstract
Drug-tolerant persister (DTP) cell populations were originally discovered in antibiotic-resistant bacterial biofilms. Similar populations with comparable features have since been identified among cancer cells and have been linked with treatment resistance that lacks an underlying genomic alteration. Research over the past decade has improved our understanding of the biological roles of DTP cells in cancer, although clinical knowledge of the role of these cells in treatment resistance remains limited. Nonetheless, targeting this population is anticipated to provide new treatment opportunities. In this Perspective, we aim to provide a clear definition of the DTP phenotype, discuss the underlying characteristics of these cells, their biomarkers and vulnerabilities, and encourage further research on DTP cells that might improve our understanding and enable the development of more effective anticancer therapies.
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Affiliation(s)
- Yi Pu
- Department of Thoracic Surgery and Institute of Thoracic Oncology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
- Department of Burn Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Lu Li
- Lung Cancer Centre, West China Hospital, Sichuan University, Chengdu, China
| | - Haoning Peng
- Department of Thoracic Surgery and Institute of Thoracic Oncology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Lunxu Liu
- Department of Thoracic Surgery and Institute of Thoracic Oncology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Dominique Heymann
- Nantes Université, CNRS, UMR6286, US2B, Nantes, France
- Institut de Cancérologie de l'Ouest, Saint-Herblain, France
| | - Caroline Robert
- INSERM U981, Gustave Roussy Cancer Campus, Villejuif, France
- Université Paris-Saclay, Le Kremlin-Bicêtre, France
| | - François Vallette
- Institut de Cancérologie de l'Ouest, Saint-Herblain, France.
- Nantes Université, INSERM, U1307, CRCI2NA, Nantes, France.
| | - Shensi Shen
- Department of Thoracic Surgery and Institute of Thoracic Oncology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China.
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Jubelin C, Muñoz-Garcia J, Cochonneau D, Ollivier E, Vallette F, Heymann MF, Oliver L, Heymann D. Technical report: liquid overlay technique allows the generation of homogeneous osteosarcoma, glioblastoma, lung and prostate adenocarcinoma spheroids that can be used for drug cytotoxicity measurements. Front Bioeng Biotechnol 2023; 11:1260049. [PMID: 37869710 PMCID: PMC10588472 DOI: 10.3389/fbioe.2023.1260049] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 09/25/2023] [Indexed: 10/24/2023] Open
Abstract
Introduction: The mechanisms involved in cancer initiation, progression, drug resistance, and disease recurrence are traditionally investigated through in vitro adherent monolayer (2D) cell models. However, solid malignant tumor growth is characterized by progression in three dimensions (3D), and an increasing amount of evidence suggests that 3D culture models, such as spheroids, are suitable for mimicking cancer development. The aim of this report was to reaffirm the relevance of simpler 3D culture methods to produce highly reproducible spheroids, especially in the context of drug cytotoxicity measurements. Methods: Human A549 lung adenocarcinoma, LnCaP prostate adenocarcinoma, MNNG/HOS osteosarcoma and U251 glioblastoma cell lines were grown into spheroids for 20 days using either Liquid Overlay Technique (LOT) or Hanging Drop (HD) in various culture plates. Their morphology was examined by microscopy. Sensitivity to doxorubicin was compared between MNNG/HOS cells grown in 2D and 3D. Results: For all cell lines studied, the morphology of spheroids generated in round-bottom multiwell plates was more repeatable than that of those generated in flat-bottom multiwell plates. HD had no significant advantage over LOT when the spheroids were cultured in round-bottom plates. Finally, the IC50 of doxorubicin on MNNG/HOS cultured in 3D was 18.8 times higher than in 2D cultures (3D IC50 = 15.07 ± 0.3 µM; 2D IC50 = 0.8 ± 0.4 µM; *p < 0.05). Discussion: In conclusion, we propose that the LOT method, despite and because of its simplicity, is a relevant 3D model for drug response measurements that could be scaled up for high throughput screening.
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Affiliation(s)
- Camille Jubelin
- Nantes Université, Centre National de la Recherche Scientifique (CNRS), Unit in Biological Sciences and Biotechnologies (US2B), Nantes, France
- Institut de Cancérologie de l’Ouest, Tumor Heterogeneity and Precision Medicine Lab, Saint-Herblain, France
- Atlantic Bone Screen, Saint-Herblain, France
| | - Javier Muñoz-Garcia
- Nantes Université, Centre National de la Recherche Scientifique (CNRS), Unit in Biological Sciences and Biotechnologies (US2B), Nantes, France
- Institut de Cancérologie de l’Ouest, Tumor Heterogeneity and Precision Medicine Lab, Saint-Herblain, France
| | - Denis Cochonneau
- Institut de Cancérologie de l’Ouest, Tumor Heterogeneity and Precision Medicine Lab, Saint-Herblain, France
| | - Emilie Ollivier
- Institut de Cancérologie de l’Ouest, Tumor Heterogeneity and Precision Medicine Lab, Saint-Herblain, France
| | - François Vallette
- Institut de Cancérologie de l’Ouest, Tumor Heterogeneity and Precision Medicine Lab, Saint-Herblain, France
- Nantes Université, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche en Cancérologie et Immunologie Nantes-Angers (CRCINA), Nantes, France
| | - Marie-Françoise Heymann
- Nantes Université, Centre National de la Recherche Scientifique (CNRS), Unit in Biological Sciences and Biotechnologies (US2B), Nantes, France
- Institut de Cancérologie de l’Ouest, Tumor Heterogeneity and Precision Medicine Lab, Saint-Herblain, France
| | - Lisa Oliver
- Nantes Université, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche en Cancérologie et Immunologie Nantes-Angers (CRCINA), Nantes, France
- CHU de Nantes, Nantes, France
| | - Dominique Heymann
- Nantes Université, Centre National de la Recherche Scientifique (CNRS), Unit in Biological Sciences and Biotechnologies (US2B), Nantes, France
- Institut de Cancérologie de l’Ouest, Tumor Heterogeneity and Precision Medicine Lab, Saint-Herblain, France
- Department of Oncology and Metabolism, Medical School, University of Sheffield, Sheffield, United Kingdom
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Terrié E, Déliot N, Benzidane Y, Harnois T, Cousin L, Bois P, Oliver L, Arnault P, Vallette F, Constantin B, Coronas V. Store-Operated Calcium Channels Control Proliferation and Self-Renewal of Cancer Stem Cells from Glioblastoma. Cancers (Basel) 2021; 13:cancers13143428. [PMID: 34298643 PMCID: PMC8307764 DOI: 10.3390/cancers13143428] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 07/05/2021] [Accepted: 07/05/2021] [Indexed: 12/20/2022] Open
Abstract
Simple Summary Glioblastoma is a high-grade primary brain tumor that contains a subpopulation of cells called glioblastoma stem cells, which are responsible for tumor initiation, growth and recurrence after treatment. Recent transcriptomic studies have highlighted that calcium pathways predominate in glioblastoma stem cells. Calcium channels have the ability to transduce signals from the microenvironment and are therefore ideally placed to control cellular behavior. Using multiple approaches, we demonstrate in five different primary cultures, previously derived from surgical specimens, that glioblastoma stem cells express store-operated channels (SOC) that support calcium entry into these cells. Pharmacological inhibition of SOC dramatically reduces cell proliferation and stem cell self-renewal in these cultures. By identifying SOC as a critical mechanism involved in the maintenance of the stem cell population in glioblastoma, our study will contribute to the framework for the identification of new therapies against this deadly tumor. Abstract Glioblastoma is the most frequent and deadly form of primary brain tumors. Despite multimodal treatment, more than 90% of patients experience tumor recurrence. Glioblastoma contains a small population of cells, called glioblastoma stem cells (GSC) that are highly resistant to treatment and endowed with the ability to regenerate the tumor, which accounts for tumor recurrence. Transcriptomic studies disclosed an enrichment of calcium (Ca2+) signaling transcripts in GSC. In non-excitable cells, store-operated channels (SOC) represent a major route of Ca2+ influx. As SOC regulate the self-renewal of adult neural stem cells that are possible cells of origin of GSC, we analyzed the roles of SOC in cultures of GSC previously derived from five different glioblastoma surgical specimens. Immunoblotting and immunocytochemistry experiments showed that GSC express Orai1 and TRPC1, two core SOC proteins, along with their activator STIM1. Ca2+ imaging demonstrated that SOC support Ca2+ entries in GSC. Pharmacological inhibition of SOC-dependent Ca2+ entries decreased proliferation, impaired self-renewal, and reduced expression of the stem cell marker SOX2 in GSC. Our data showing the ability of SOC inhibitors to impede GSC self-renewal paves the way for a strategy to target the cells considered responsible for conveying resistance to treatment and tumor relapse.
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Affiliation(s)
- Elodie Terrié
- CNRS ERL 7003, Signalisation et Transports Ioniques Membranaires, University of Poitiers, CEDEX 09, 86073 Poitiers, France; (E.T.); (N.D.); (Y.B.); (T.H.); (L.C.); (P.A.); (B.C.)
| | - Nadine Déliot
- CNRS ERL 7003, Signalisation et Transports Ioniques Membranaires, University of Poitiers, CEDEX 09, 86073 Poitiers, France; (E.T.); (N.D.); (Y.B.); (T.H.); (L.C.); (P.A.); (B.C.)
| | - Yassine Benzidane
- CNRS ERL 7003, Signalisation et Transports Ioniques Membranaires, University of Poitiers, CEDEX 09, 86073 Poitiers, France; (E.T.); (N.D.); (Y.B.); (T.H.); (L.C.); (P.A.); (B.C.)
| | - Thomas Harnois
- CNRS ERL 7003, Signalisation et Transports Ioniques Membranaires, University of Poitiers, CEDEX 09, 86073 Poitiers, France; (E.T.); (N.D.); (Y.B.); (T.H.); (L.C.); (P.A.); (B.C.)
| | - Laëtitia Cousin
- CNRS ERL 7003, Signalisation et Transports Ioniques Membranaires, University of Poitiers, CEDEX 09, 86073 Poitiers, France; (E.T.); (N.D.); (Y.B.); (T.H.); (L.C.); (P.A.); (B.C.)
| | - Patrick Bois
- EA 4379, Signalisation et Transports Ioniques Membranaires, University of Poitiers, CEDEX 09, 86073 Poitiers, France;
| | - Lisa Oliver
- CRCINA-UMR 1232 INSERM, Université de Nantes, CEDEX 01, 44007 Nantes, France; (L.O.); (F.V.)
| | - Patricia Arnault
- CNRS ERL 7003, Signalisation et Transports Ioniques Membranaires, University of Poitiers, CEDEX 09, 86073 Poitiers, France; (E.T.); (N.D.); (Y.B.); (T.H.); (L.C.); (P.A.); (B.C.)
| | - François Vallette
- CRCINA-UMR 1232 INSERM, Université de Nantes, CEDEX 01, 44007 Nantes, France; (L.O.); (F.V.)
- CNRS GDR3697, Micronit “Microenvironment of Tumor Niches”, 37000 Tours, France
| | - Bruno Constantin
- CNRS ERL 7003, Signalisation et Transports Ioniques Membranaires, University of Poitiers, CEDEX 09, 86073 Poitiers, France; (E.T.); (N.D.); (Y.B.); (T.H.); (L.C.); (P.A.); (B.C.)
- CNRS GDR3697, Micronit “Microenvironment of Tumor Niches”, 37000 Tours, France
| | - Valérie Coronas
- CNRS ERL 7003, Signalisation et Transports Ioniques Membranaires, University of Poitiers, CEDEX 09, 86073 Poitiers, France; (E.T.); (N.D.); (Y.B.); (T.H.); (L.C.); (P.A.); (B.C.)
- CNRS GDR3697, Micronit “Microenvironment of Tumor Niches”, 37000 Tours, France
- Correspondence: ; Tel.: +33-(0)5-49-45-36-55
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Fleurence J, Bahri M, Fougeray S, Faraj S, Vermeulen S, Pinault E, Geraldo F, Oliver L, Véziers J, Marquet P, Rabé M, Gratas C, Vallette F, Pecqueur C, Paris F, Birklé S. Impairing temozolomide resistance driven by glioma stem-like cells with adjuvant immunotherapy targeting O-acetyl GD2 ganglioside. Int J Cancer 2019; 146:424-438. [PMID: 31241171 DOI: 10.1002/ijc.32533] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 06/17/2019] [Indexed: 12/24/2022]
Abstract
Stem cell chemoresistance remains challenging the efficacy of the front-line temozolomide against glioblastoma. Novel therapies are urgently needed to fight those cells in order to control tumor relapse. Here, we report that anti-O-acetyl-GD2 adjuvant immunotherapy controls glioma stem-like cell-driven chemoresistance. Using patient-derived glioblastoma cells, we found that glioma stem-like cells overexpressed O-acetyl-GD2. As a result, monoclonal antibody 8B6 immunotherapy significantly increased temozolomide genotoxicity and tumor cell death in vitro by enhancing temozolomide tumor uptake. Furthermore, the combination therapy decreased the expression of the glioma stem-like cell markers CD133 and Nestin and compromised glioma stem-like cell self-renewal capabilities. When tested in vivo, adjuvant 8B6 immunotherapy prevented the extension of the temozolomide-resistant glioma stem-like cell pool within the tumor bulk in vivo and was more effective than the single agent therapies. This is the first report demonstrating that anti-O-acetyl-GD2 monoclonal antibody 8B6 targets glioblastoma in a manner that control temozolomide-resistance driven by glioma stem-like cells. Together our results offer a proof of concept for using anti-O-acetyl GD2 reagents in glioblastoma to develop more efficient combination therapies for malignant gliomas.
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Affiliation(s)
- Julien Fleurence
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France
| | - Meriem Bahri
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France
| | - Sophie Fougeray
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France.,Université de Nantes, UFR des Sciences Pharmaceutiques et Biologiques, Nantes, France
| | - Sébastien Faraj
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France.,Centre Hospitalier Universitaire de Nantes, Nantes, France
| | - Sarah Vermeulen
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France
| | - Emilie Pinault
- Univ. Limoges, BISCEm Mass Spectrometry Platform, Limoges, France
| | - Fanny Geraldo
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France
| | - Lisa Oliver
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France
| | - Joëlle Véziers
- INSERM, UMRS 1229, RMeS "Regenerative Medicine and Skeleton", Team STEP "Skeletal Physiopathology and Joint Regenerative Medicine", Nantes, France.,SC3M platform, UMS INSERM 016/CNRS 3556, SFR François Bonamy, Nantes, France.,CHU Nantes, PHU 4 OTONN, Nantes, France
| | - Pierre Marquet
- INSERM, Univ. Limoges, CHU Limoges, IPPRITT, U1248, Limoges, France
| | - Marion Rabé
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France
| | - Catherine Gratas
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France.,Centre Hospitalier Universitaire de Nantes, Nantes, France
| | - François Vallette
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France.,LaBCT, Institut de Cancérologie de l'Ouest-René Gauducheau, Saint-Herblain, France
| | - Claire Pecqueur
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France
| | - François Paris
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France.,LaBCT, Institut de Cancérologie de l'Ouest-René Gauducheau, Saint-Herblain, France
| | - Stéphane Birklé
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, France.,Université de Nantes, UFR des Sciences Pharmaceutiques et Biologiques, Nantes, France
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Ginisty A, Oliver L, Arnault P, Vallette F, Benzakour O, Coronas V. The vitamin K-dependent factor, protein S, regulates brain neural stem cell migration and phagocytic activities towards glioma cells. Eur J Pharmacol 2019; 855:30-39. [PMID: 31028740 DOI: 10.1016/j.ejphar.2019.04.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 04/18/2019] [Accepted: 04/18/2019] [Indexed: 10/26/2022]
Abstract
Malignant gliomas are the most common primary brain tumors. Due to both their invasive nature and resistance to multimodal treatments, these tumors have a very high percentage of recurrence leading in most cases to a rapid fatal outcome. Recent data demonstrated that neural stem/progenitor cells possess an inherent ability to migrate towards glioma cells, track them in the brain and reduce their growth. However, mechanisms involved in these processes have not been explored in-depth. In the present report, we investigated interactions between glioma cells and neural stem/progenitor cells derived from the subventricular zone, the major brain stem cell niche. Our data show that neural stem/progenitor cells are attracted by cultured glioma-derived factors. Using multiple approaches, we demonstrate for the first time that the vitamin K-dependent factor protein S produced by glioma cells is involved in tumor tropism through a mechanism involving the tyrosine kinase receptor Tyro3 that, in turn, is expressed by neural stem/progenitor cells. Neural stem/progenitor cells decrease the growth of both glioma cell cultures and clonogenic population. Cultured neural stem/progenitor cells also engulf, by phagocytosis, apoptotic glioma cell-derived fragments and this mechanism depends on the exposure of phosphatidylserine eat-me signal and is stimulated by protein S. The disclosure of a role of protein S/Tyro3 axis in neural stem/progenitor cell tumor-tropism and the demonstration of a phagocytic activity of neural stem/progenitor cells towards dead glioma cells that is regulated by protein S open up new perspectives for both stem cell biology and brain physiopathology.
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Affiliation(s)
- Aurélie Ginisty
- Laboratoire Signalisations et Transports Ioniques Membranaires (STIM), CNRS ERL 7003 Equipe 4CS - Université de Poitiers, UFR SFA, Pôle Biologie Santé, Bâtiment B36, 1 Rue Georges Bonnet, TSA 51106, 86073, POITIERS Cedex 9, France; Present Address: Biological Adaptation and Ageing (B2A) UMR 8256 CNRS-UPMC Institut de Biologie Paris Seine (IBPS) Sorbonne Université, 75005, Paris, France
| | - Lisa Oliver
- CRCINA, Inserm U1232, Université de Nantes, 44 0000, Nantes, France; Institut de Cancérologie de l'Ouest, René Gauducheau, 44 8000, St Herblain, France; Micronit GDR CNRS 3697, 75020, Paris, France
| | - Patricia Arnault
- Laboratoire Signalisations et Transports Ioniques Membranaires (STIM), CNRS ERL 7003 Equipe 4CS - Université de Poitiers, UFR SFA, Pôle Biologie Santé, Bâtiment B36, 1 Rue Georges Bonnet, TSA 51106, 86073, POITIERS Cedex 9, France; Micronit GDR CNRS 3697, 75020, Paris, France
| | - François Vallette
- CRCINA, Inserm U1232, Université de Nantes, 44 0000, Nantes, France; Institut de Cancérologie de l'Ouest, René Gauducheau, 44 8000, St Herblain, France; Micronit GDR CNRS 3697, 75020, Paris, France
| | - Omar Benzakour
- Inserm U1082, Université de Poitiers, 86073, Poitiers cedex 09, France
| | - Valérie Coronas
- Laboratoire Signalisations et Transports Ioniques Membranaires (STIM), CNRS ERL 7003 Equipe 4CS - Université de Poitiers, UFR SFA, Pôle Biologie Santé, Bâtiment B36, 1 Rue Georges Bonnet, TSA 51106, 86073, POITIERS Cedex 9, France; Micronit GDR CNRS 3697, 75020, Paris, France.
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7
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Lafargue A, Degorre C, Corre I, Alves-Guerra MC, Gaugler MH, Vallette F, Pecqueur C, Paris F. Ionizing radiation induces long-term senescence in endothelial cells through mitochondrial respiratory complex II dysfunction and superoxide generation. Free Radic Biol Med 2017; 108:750-759. [PMID: 28431961 DOI: 10.1016/j.freeradbiomed.2017.04.019] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [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: 11/21/2016] [Revised: 04/01/2017] [Accepted: 04/16/2017] [Indexed: 12/18/2022]
Abstract
Ionizing radiation causes oxidative stress, leading to acute and late cellular responses. We previously demonstrated that irradiation of non-proliferating endothelial cells, as observed in normal tissues, induces early apoptosis, which can be inhibited by pretreatment with Sphingosine-1-Phosphate. We now propose to better characterize the long-term radiation response of endothelial cells by studying the molecular pathways associated with senescence and its link with acute apoptosis. First, senescence was validated in irradiated quiescent microvascular HMVEC-L in a dose- and time-dependent manner by SA β-galactosidase staining, p16Ink4a and p21Waf1 expression, pro-inflammatory IL-8 secretion and DNA damage response activation. This premature aging was induced independently of Sphingosine 1-Phosphate treatment, supporting its non-connection with acute IR-induced apoptosis. Then, senescence under these conditions showed persistent activation of p53 pathway and mitochondrial dysfunctions, characterized by O2·- generation, inhibition of respiratory complex II activity and over-expression of SOD2 and GPX1 detoxification enzymes. Senescence was significantly inhibited by treatment with pifithrin-α, a p53 inhibitor, or by MnTBAP, a superoxide dismutase mimetic, validating those molecular actors in IR-induced endothelial cell aging. However, MnTBAP, but not pifithrin-α, was able to limit superoxide generation and to rescue the respiratory complex II activity. Furthermore, MnTBAP was not modulating p53 up-regulation, suggesting that IR-induced senescence in quiescent endothelial cells is provided by at least 2 different pathways dependent of the mitochondrial oxidative stress response and the p53 activation. Further characterization of the actors involved in the respiratory complex II dysfunction will open new pharmacological strategies to modulate late radiation toxicity.
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Affiliation(s)
| | | | - Isabelle Corre
- CRCINA, INSERM, CNRS, Université de Nantes, Nantes, France
| | - Marie-Clotilde Alves-Guerra
- Inserm UMR1016, Paris F-75014, France; CNRS UMR8104, Paris F-75014, France; Université Paris Descartes, Paris F-75014, France
| | | | - François Vallette
- CRCINA, INSERM, CNRS, Université de Nantes, Nantes, France; Institut de Cancérologie de l'Ouest, Saint-Herblain F-44800, France
| | | | - François Paris
- CRCINA, INSERM, CNRS, Université de Nantes, Nantes, France; Institut de Cancérologie de l'Ouest, Saint-Herblain F-44800, France.
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Alligand B, Le Breton M, Marquis D, Vallette F, Fleury F. Functional effects of diphosphomimetic mutations at cAbl-mediated phosphorylation sites on Rad51 recombinase activity. Biochimie 2017; 139:115-124. [PMID: 28571978 DOI: 10.1016/j.biochi.2017.05.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Accepted: 05/27/2017] [Indexed: 01/10/2023]
Abstract
Homologous Recombination enables faithful repair of the deleterious double strand breaks of DNA. This pathway relies on Rad51 to catalyze homologous DNA strand exchange. Rad51 is known to be phosphorylated in a sequential manner on Y315 and then on Y54, but the effect of such phosphorylation on Rad51 function remains poorly understood. We have developed a phosphomimetic model in order to study all the phosphorylation states. With the purified phosphomimetic proteins we performed in vitro assays to determine the activity of Rad51. Here we demonstrate the inhibitory effect of the double phosphomimetic mutant and suggest that it may be due to a defect in nucleofilament formation.
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Affiliation(s)
- Brendan Alligand
- Team 3 Mechanism and Regulation of DNA Repair, UFIP, CNRS UMR 6286, Nantes University, France; Team 9 Apoptosis in Nervous Central System Tumours, CRCINA, INSERM U892, Nantes University, France
| | - Magali Le Breton
- Team 3 Mechanism and Regulation of DNA Repair, UFIP, CNRS UMR 6286, Nantes University, France
| | - Damien Marquis
- Team 3 Mechanism and Regulation of DNA Repair, UFIP, CNRS UMR 6286, Nantes University, France
| | - François Vallette
- Team 9 Apoptosis in Nervous Central System Tumours, CRCINA, INSERM U892, Nantes University, France
| | - Fabrice Fleury
- Team 3 Mechanism and Regulation of DNA Repair, UFIP, CNRS UMR 6286, Nantes University, France.
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9
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Raimbourg J, Cabart M, Joalland MP, Decaudin D, Deplater L, Lanoe D, Douillard JY, Bennouna J, Vallette F, Lalier L. Abstract 2559: Optimisation of EGFR TKI efficiency wild-type EGFR lung cancer. Cancer Res 2015. [DOI: 10.1158/1538-7445.am2015-2559] [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: 11/16/2022]
Abstract
Abstract
Background : Lung cancer is the first cause of cancer death worldwide. EGFR tyrosine kinase inhibitors (EGFR-TKI) have improved the survival of patient harboring EGFR activating mutations. Besides, EGFR-TKIs have shown clinical activity for patients with wild type EGFR (wtEGFR) tumors as maintenance treatment and for a fraction of them as second line treatment. These observations impel us to objective and document the mechanisms implicated in order to optimize the use of EGFR-TKI in the treatment of wtEGFR lung cancer.
Methods : In vitro experiments rely on lung cancer cell lines expressing either wtEGFR or mutated EGFR. Their sensitivity to erlotinib in control conditions or short after a sublethal cisplatin treatment was studied. In vitro results were validated on lung patients-derived xenografts (PDX) with four wtEGFR human adenocarcinomas.
Results : Cisplatin pretreatment enhances erlotinib toxicity in wtEGFR cells (providing its robust expression) but not in EGFR-mutated cells. Cisplatin priming increases erlotinib toxicity either through apoptosis or autophagy depending on the cell line. This sensitization correlates with an increase in EGFR expression and phosphorylation and a raise in AKT and Erk phosphorylation. The sensitization is also observed during long-term cisplatin treatment in a cisplatin-resistant subpopulation, together with concomitant EGFR pathway activation.
The in vivo experiments conducted in PDX confirm that cisplatin pretreatment potentiates erlotinib in three of the four wtEGFR lung tumors models.
Of note, the sensitization to erlotinib occured independently from KRas status.
Conclusion : The sensitivity of the wtEGFR lung cancer cells and lung cancer xenografts to erlotinib is enhanced by cisplatin pretreatment, whatever the type of induced cell death. Cisplatin induces activation of EGFR and his downstream kinases AKT and Erk. This sensitization is independent from the tumor K-Ras status. EGFR phosphorylation could be a potential marker of this sensitization and might be predicitive of the optimal efficiency of EGFR TKI. In vivo validation of this marker is still ongoing.
This study was supported by Roche laboratory and by the foundation for medical research.
Citation Format: Judith Raimbourg, Mathilde Cabart, Marie-Pierre Joalland, Didier Decaudin, Ludmilla Deplater, Didier Lanoe, Jean-Yves Douillard, Jaafar Bennouna, François Vallette, Lisenn Lalier. Optimisation of EGFR TKI efficiency wild-type EGFR lung cancer. [abstract]. In: Proceedings of the 106th Annual Meeting of the American Association for Cancer Research; 2015 Apr 18-22; Philadelphia, PA. Philadelphia (PA): AACR; Cancer Res 2015;75(15 Suppl):Abstract nr 2559. doi:10.1158/1538-7445.AM2015-2559
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Affiliation(s)
| | | | | | | | | | - Didier Lanoe
- 1Institut de cancérologie de l'ouest, St herblain, France
| | | | | | | | - Lisenn Lalier
- 1Institut de cancérologie de l'ouest, St herblain, France
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Olivier C, Cartron P, Joalland M, Vallette F, Bard J. Cholesterol homeostasis actors and survival time after glioblastoma surgery (825.4). FASEB J 2014. [DOI: 10.1096/fasebj.28.1_supplement.825.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Christope Olivier
- UFR Pharmacy and Biological Sciences University of Nantes and INSERM U892‐CNRS 6299NantesFrance
| | - Pierre‐François Cartron
- Institut DE Recherche en Santé DE l'Université DE Nantes (IRS‐UN) INSERM U892‐CNRS 6299NantesFrance
| | | | - François Vallette
- Institut DE Recherche en Santé DE l'Université DE Nantes (IRS‐UN) INSERM U892‐CNRS 6299NantesFrance
| | - Jean‐Marie Bard
- UFR Pharmacy and Biological Sciences University of Nantes and Integrated Center for OncologyNantesFrance
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11
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Paris F, Lafargue A, Pecqueur C, Vallette F. OC-0050: Radiation-induced endothelial senescence is under the control of p53 and mitochondrial dysfunction. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)30155-9] [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: 11/26/2022]
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12
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Bourseau-Guilmain E, Lemaire L, Griveau A, Hervouet E, Vallette F, Berger F, Menei P, Benoit JP, Wion D, Garcion E. In vitro expansion of human glioblastoma cells at non-physiological oxygen tension irreversibly alters subsequent in vivo aggressiveness and AC133 expression. Int J Oncol 2011; 40:1220-9. [PMID: 22134773 PMCID: PMC3584613 DOI: 10.3892/ijo.2011.1271] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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: 09/07/2011] [Accepted: 10/19/2011] [Indexed: 12/03/2022] Open
Abstract
Among markers of glioblastoma initiating cells, AC133 has been shown to be associated with glioblastoma resistance and malignancy. Recently, it was demonstrated that increasing oxygen tension (pO2) down-regulated AC133 expression in glioblastoma cells in vitro. In order to better understand extrinsic factor regulation of AC133, this work aimed to investigate the relationship between cell culture pO2, AC133 expression, and tumor development and phenotype. Using treatments with CoCl2 and HIF-1α shRNA knockdowns on non-sorted human primary glioblastoma cells cultured at low (3%) versus high (21%) oxygen tension, we established a responsibility for low pO2 in the maintenance of high levels of AC133 expression, with a major but non-exclusive role for HIF-1α. We also demonstrated that human glioblastoma cells previously cultured under high oxygen tension can lose part of their aggressiveness when orthotopically engrafted in SCID mice or lead to tumors with distinct phenotypes and no re-expression of AC133. These observations showed that the specific pO2 microenvironment irreversibly impacts glioblastoma cell phenotypes, highlighting the pertinence of culture conditions when extrapolating data from xenogenic models to human cells in their source environment. They also raised AC133 as a marker of non-exposure to oxygenated areas rather than a marker of aggressiveness or low pO2 niches.
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Affiliation(s)
- Erika Bourseau-Guilmain
- Laboratoire d'Ingénierie de la Vectorisation Particulaire, Inserm, UMR_S 646, Université d'Angers, Angers, France
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13
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Thiriet N, Agasse F, Nicoleau C, Guégan C, Vallette F, Cadet JL, Jaber M, Malva JO, Coronas V. NPY promotes chemokinesis and neurogenesis in the rat subventricular zone. J Neurochem 2011; 116:1018-27. [PMID: 21175616 DOI: 10.1111/j.1471-4159.2010.07154.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The subventricular zone (SVZ) is a major reservoir for stem cells in the adult mammalian brain. Neural stem cells supply the olfactory bulb with new interneurons and provide cells that migrate towards lesioned brain areas. Neuropeptide Y (NPY), one of the most abundant neuropeptides in the brain, was previously shown to induce neuroproliferation on mice SVZ cells. In the present study, performed in rats, we demonstrate the endogenous synthesis of NPY by cells in the SVZ that suggests that NPY could act as an autocrine/paracrine factor within the SVZ area. We observed that NPY promotes SVZ cell proliferation as previously reported in mice, but does not affect self-renewal of SVZ stem cells. Additionally, this study provides the first direct evidence of a chemokinetic activity of NPY on SVZ cells. Using pharmacological approaches, we demonstrate that both the mitogenic and chemokinetic properties of NPY involve Y1 receptor-mediated activation of the ERK1/2 MAP kinase pathway. Altogether, our data establish that NPY through Y1 receptors activation controls chemokinetic activity and, as for mice, is a major neuroproliferative regulator of rat SVZ cells.
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Affiliation(s)
- Nathalie Thiriet
- Institut de Physiologie et Biologie Cellulaires, University of Poitiers, CNRS, Poitiers Cedex, France
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14
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Ducray F, de Reyniès A, Chinot O, Idbaih A, Figarella-Branger D, Colin C, Karayan-Tapon L, Chneiweiss H, Wager M, Vallette F, Marie Y, Rickman D, Thomas E, Delattre JY, Honnorat J, Sanson M, Berger F. An ANOCEF genomic and transcriptomic microarray study of the response to radiotherapy or to alkylating first-line chemotherapy in glioblastoma patients. Mol Cancer 2010; 9:234. [PMID: 20822523 PMCID: PMC2944185 DOI: 10.1186/1476-4598-9-234] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2009] [Accepted: 09/07/2010] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND The molecular characteristics associated with the response to treatment in glioblastomas (GBMs) remain largely unknown. We performed a retrospective study to assess the genomic characteristics associated with the response of GBMs to either first-line chemotherapy or radiation therapy. The gene expression (n = 56) and genomic profiles (n = 67) of responders and non-responders to first-line chemotherapy or radiation therapy alone were compared on Affymetrix Plus 2 gene expression arrays and BAC CGH arrays. RESULTS According to Verhaak et al.'s classification system, mesenchymal GBMs were more likely to respond to radiotherapy than to first-line chemotherapy, whereas classical GBMs were more likely to respond to first-line chemotherapy than to radiotherapy. In patients treated with radiation therapy alone, the response was associated with differential expression of microenvironment-associated genes; the expression of hypoxia-related genes was associated with short-term progression-free survival (< 5 months), whereas the expression of immune genes was associated with prolonged progression-free survival (> 10 months). Consistently, infiltration of the tumor by both CD3 and CD68 cells was significantly more frequent in responders to radiotherapy than in non-responders. In patients treated with first-line chemotherapy, the expression of stem-cell genes was associated with resistance to chemotherapy, and there was a significant association between response to treatment and p16 locus deletions. Consistently, in an independent data set of patients treated with either radiotherapy alone or with both radiotherapy and adjuvant chemotherapy, we found that patients with the p16 deletion benefited from adjuvant chemotherapy regardless of their MGMT promoter methylation status, whereas in patients without the p16 deletion, this benefit was only observed in patients with a methylated MGMT promoter. CONCLUSION Differential expression of microenvironment genes and p16 locus deletion are associated with responses to radiation therapy and to first-line chemotherapy, respectively, in GBM. Recently identified transcriptomic subgroups of GBMs seem to respond differently to radiotherapy and to first-line chemotherapy.
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Affiliation(s)
- François Ducray
- INSERM, U842, Lyon, F-69372 France; Université Lyon 1, UMR-S842 Lyon, F-69003 France
- Hôpital de la Salpêtrière (APHP), INSERM U711 and Université P&M Curie, Paris, France
- ANOCEF (Association des Neuro-Oncologues d'Expression Française -French Speaking NeuroOncologists' Association), Unité de neuro-oncologie CHU Timone 264, rue Saint Pierre 13385 Marseille Cedex 5
| | - Aurélien de Reyniès
- Programme Cartes d'Identité des Tumeurs (CIT), Ligue Nationale Contre le Cancer, Paris, France
| | - Olivier Chinot
- Université de la Méditerranée, Faculté de Médecine de Marseille, Assistance Publique-Hôpitaux de Marseille, Unité de Neuro-Oncologie, Centre Hospitalier Universitaire Timone, 264 rue Saint Pierre, 13385 Marseille Cedex 05, France
- ANOCEF (Association des Neuro-Oncologues d'Expression Française -French Speaking NeuroOncologists' Association), Unité de neuro-oncologie CHU Timone 264, rue Saint Pierre 13385 Marseille Cedex 5
| | - Ahmed Idbaih
- Hôpital de la Salpêtrière (APHP), INSERM U711 and Université P&M Curie, Paris, France
- ANOCEF (Association des Neuro-Oncologues d'Expression Française -French Speaking NeuroOncologists' Association), Unité de neuro-oncologie CHU Timone 264, rue Saint Pierre 13385 Marseille Cedex 5
| | - Dominique Figarella-Branger
- « Equipe Angiogenèse, Invasivité et Microenvironnement tumoral » Faculté Médecine Timone, Université de la Mediterrannée UMR911 CRO2, Service d'Anatomie Pathologique et de Neuropathologie, Assistance Publique des Hôpitaux de Marseille, hôpital de la Timone, Bd Jean Moulin 13385 Marseille cedex 05, France
- ANOCEF (Association des Neuro-Oncologues d'Expression Française -French Speaking NeuroOncologists' Association), Unité de neuro-oncologie CHU Timone 264, rue Saint Pierre 13385 Marseille Cedex 5
| | - Carole Colin
- « Equipe Angiogenèse, Invasivité et Microenvironnement tumoral » Faculté Médecine Timone, Université de la Mediterrannée UMR911 CRO2, Service d'Anatomie Pathologique et de Neuropathologie, Assistance Publique des Hôpitaux de Marseille, hôpital de la Timone, Bd Jean Moulin 13385 Marseille cedex 05, France
- ANOCEF (Association des Neuro-Oncologues d'Expression Française -French Speaking NeuroOncologists' Association), Unité de neuro-oncologie CHU Timone 264, rue Saint Pierre 13385 Marseille Cedex 5
| | - Lucie Karayan-Tapon
- Université de Poitiers, EA3805, CHU de Poitiers, 86022 Poitiers cedex, France
- ANOCEF (Association des Neuro-Oncologues d'Expression Française -French Speaking NeuroOncologists' Association), Unité de neuro-oncologie CHU Timone 264, rue Saint Pierre 13385 Marseille Cedex 5
| | - Hervé Chneiweiss
- UMR 894 INSERM, Faculté de Médecine Université Paris Descartes, Paris, France
- ANOCEF (Association des Neuro-Oncologues d'Expression Française -French Speaking NeuroOncologists' Association), Unité de neuro-oncologie CHU Timone 264, rue Saint Pierre 13385 Marseille Cedex 5
| | - Michel Wager
- Université de Poitiers, EA3805, CHU de Poitiers, 86022 Poitiers cedex, France
- ANOCEF (Association des Neuro-Oncologues d'Expression Française -French Speaking NeuroOncologists' Association), Unité de neuro-oncologie CHU Timone 264, rue Saint Pierre 13385 Marseille Cedex 5
| | - François Vallette
- Centre de Recherche en Cancérologie Nantes Angers, Centre INSERM U892, Université de Nantes, 9 quai Moncousu 44035 Nantes cedex 01 France
- ANOCEF (Association des Neuro-Oncologues d'Expression Française -French Speaking NeuroOncologists' Association), Unité de neuro-oncologie CHU Timone 264, rue Saint Pierre 13385 Marseille Cedex 5
| | - Yannick Marie
- Hôpital de la Salpêtrière (APHP), INSERM U711 and Université P&M Curie, Paris, France
- ANOCEF (Association des Neuro-Oncologues d'Expression Française -French Speaking NeuroOncologists' Association), Unité de neuro-oncologie CHU Timone 264, rue Saint Pierre 13385 Marseille Cedex 5
| | - David Rickman
- Programme Cartes d'Identité des Tumeurs (CIT), Ligue Nationale Contre le Cancer, Paris, France
| | - Emilie Thomas
- Programme Cartes d'Identité des Tumeurs (CIT), Ligue Nationale Contre le Cancer, Paris, France
| | - Jean-Yves Delattre
- Hôpital de la Salpêtrière (APHP), INSERM U711 and Université P&M Curie, Paris, France
- ANOCEF (Association des Neuro-Oncologues d'Expression Française -French Speaking NeuroOncologists' Association), Unité de neuro-oncologie CHU Timone 264, rue Saint Pierre 13385 Marseille Cedex 5
| | - Jérôme Honnorat
- INSERM, U842, Lyon, F-69372 France; Université Lyon 1, UMR-S842 Lyon, F-69003 France
- ANOCEF (Association des Neuro-Oncologues d'Expression Française -French Speaking NeuroOncologists' Association), Unité de neuro-oncologie CHU Timone 264, rue Saint Pierre 13385 Marseille Cedex 5
| | - Marc Sanson
- Hôpital de la Salpêtrière (APHP), INSERM U711 and Université P&M Curie, Paris, France
- ANOCEF (Association des Neuro-Oncologues d'Expression Française -French Speaking NeuroOncologists' Association), Unité de neuro-oncologie CHU Timone 264, rue Saint Pierre 13385 Marseille Cedex 5
| | - François Berger
- Inserm U836, Grenoble Institut de Neurosciences, Unité Joseph Fourier, 38042 Grenoble Cedex 9, France
- ANOCEF (Association des Neuro-Oncologues d'Expression Française -French Speaking NeuroOncologists' Association), Unité de neuro-oncologie CHU Timone 264, rue Saint Pierre 13385 Marseille Cedex 5
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Oliver L, Olivier C, Marhuenda F, Campone M, Vallette F. Hypoxia and the Malignant Glioma Microenvironment: Regulation and Implications for Therapy. Curr Mol Pharmacol 2009; 2:263-84. [DOI: 10.2174/1874467210902030263] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Bischler A, Favre M, Frommel E, Vallette F. Permeability of the Guinea Pig's Skin to Oleates of the Alkaloids of Poisonous Solanaceae measured by Acetylcholine Aerosols. ACTA ACUST UNITED AC 2009; 4:122-6. [DOI: 10.1111/j.1600-0773.1948.tb03333.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Chipoy C, Berreur M, Couillaud S, Pradal G, Vallette F, Colombeix C, Rédini F, Heymann D, Blanchard F. Downregulation of osteoblast markers and induction of the glial fibrillary acidic protein by oncostatin M in osteosarcoma cells require PKCdelta and STAT3. J Bone Miner Res 2004; 19:1850-61. [PMID: 15476586 DOI: 10.1359/jbmr.040817] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2004] [Revised: 05/11/2004] [Accepted: 06/04/2004] [Indexed: 12/22/2022]
Abstract
UNLABELLED The effects of OSM on proliferation and differentiation of osteosarcoma and nontransformed osteoblasts were analyzed. OSM downregulates osteoblast markers but induces the glial fibrillary acidic protein by the combined activation of PKCdelta and STAT3, offering new lines of therapeutic investigations. INTRODUCTION Oncostatin M (OSM) is a multifunctional cytokine of the interleukin-6 family implicated in embryonic development, differentiation, inflammation, and regeneration of various tissues, mainly the liver, bone, and the central nervous and hematopoietic systems. One particularity of OSM relies on its growth inhibitory and pro-differentiating effects on a variety of tumor cell lines such as melanoma, providing arguments for a therapeutic application of OSM. The objective of this study was to analyze the effects of OSM on osteosarcoma cell lines proliferation and differentiation. MATERIALS AND METHODS Proliferation was analyzed by 3H thymidine incorporation. Differentiation was analyzed by semiquantitative RT-PCR and immunocytochemistry for various markers. Alizarin red S staining was used to evaluate bone nodule formation. Morphological changes were studied by confocal and electron microscopy. Western blotting, kinases inhibitors, and dominant negative STAT3 were used to identified the signaling pathways implicated. RESULTS OSM inhibits the growth of rat osteosarcoma cell lines as well as normal osteoblasts, in correlation with induction of the cyclin-dependent kinases inhibitor p21WAF1. However, OSM reduces osteoblast markers such as alkaline phosphatase, osteocalcin, and bone sialoprotein, leading to strong inhibition of mineralized nodule formation. This inhibitory effect is restricted to mature osteoblasts and differentiated osteosarcoma because OSM effectively stimulates osteoblast markers and bone nodule formation in early, but not late, bone marrow mesenchymal stem cell (BMSC) cultures. In osteosarcoma cells or BMSC, OSM induces expression of the glial fibrillary acidic protein (GFAP) as well as morphological and ultrastructural changes, for example, elongated shape and bundles of microfilaments in cell processes. Rottlerin (PKCdelta inhibitor), and to a lesser degree UO126 (MEK/ERK inhibitor), prevents the loss of osteoblastic markers by OSM, whereas dominant negative STAT3 prevents GFAP induction. CONCLUSIONS These results highlight the particular gene expression profile of OSM-treated osteosarcoma cells and BMSCs, suggesting either a osteocytic or a glial-like phenotype. Together with the implication of PKCdelta, ERK1/2, and STAT3, these results offer new lines of investigations for neural cell transplantation and osteosarcoma therapy.
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Affiliation(s)
- Céline Chipoy
- Laboratory of Pathophysiology of Bone Resorption and Therapy of Primitive Bone Tumors, INSERM ESPRI, Nantes, France
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18
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Philippe JM, Dubois JM, Rouzaire-Dubois B, Cartron PF, Vallette F, Morel N. Functional expression of V-ATPases in the plasma membrane of glial cells. Glia 2002; 37:365-73. [PMID: 11870875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Vacuolar H(+) ATPase (V-ATPase) activity is essential for many cellular processes, including intracellular membrane traffic, protein processing and degradation, and receptor-mediated endocytosis. Proton transport by V-ATPases could also play a role during cell transformation, tumorigenesis, and cell metastasis, and V-ATPase c-subunit overexpression was reported to be correlated with invasiveness of pancreatic tumors (Ohta et al., 1996). In the present work, we found that mRNAs encoding V-ATPase subunits are not overexpressed in C6 tumoral glioma cells when compared with immortalized astrocytes DI TNC1 and astrocytes in primary cultures. Accordingly, V-ATPase subunit mRNA levels are similar in human gliomas (grade II or IV) and in peritumoral tissues. A significant proportion (25%) of V-ATPase is present in the plasma membrane of both the C6 and the DI TNC1 astrocytic cells in culture. A bafilomycin-sensitive hyperpolarizing pump current through the plasma membrane was detected and measured after ionic channel inhibition, which corresponds most probably to an electrogenic transport of protons. This suggests that the plasma membrane V-ATPase is active. It could contribute to cytoplasmic pH regulation in astrocytic cells.
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Affiliation(s)
- Jean-Marc Philippe
- Laboratoire de Neurobiologie Cellulaire et Moléculaire, CNRS, Gif sur Yvette, France
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19
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Vallette F. [Generalities on the molecular mechanisms of apoptosis]. Rev Neurol (Paris) 2001; 157:453-9. [PMID: 11398021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
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20
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Martin S, Vallette F. [Apoptosis and pathologies of the central nervous system]. Neurochirurgie 2000; 46:370-5. [PMID: 11015674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
The program of cell death called apoptosis is a biochemical and genetical pathway which has been well conserved throughout evolution. In the past years, the involvement of apoptosis has been shown not only during the embryonic development of the nervous system, but also in neurodegenerative diseases. Moreover, resistance to apoptosis is clearly an important factor in tumor growth and seems to be, at least partially, a major process in chemo- and radio-resistance. In this review, we briefly describe the main molecular events of the apoptotic process, known to date, and discuss possible defects in the central nervous system diseases.
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Affiliation(s)
- S Martin
- Clinique Universitaire de Neurochirurgie (Pr Y. Lajat), Hôpital Laennec, BP 1005, 44035 Nantes Cedex 01.
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21
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Abstract
The PSC (peptide-sensitive Channel), a cationic channel of large conductance, has been characterized in yeast and mammalian mitochondria by three different methods, "tip-dip," patch clamp of giant liposomes, and planar bilayers. The yeast and mammalian PSC share the common property to be blocked by basic peptides such as pCyt OX IV (1-12)Y which contains the first 12 residues of the presequence of cytochrome C oxidase subunit IV. The electrophysiological data are consistent with a translocation of the peptide through the pore. Analysis of the frequency of observation of the PSC in different fractions indicates that the channel is located in the outer mitochondrial membrane. Uptake measurements of iodinated peptides by intact mitochondria from a porin-less mutant show that the peptides are translocated through the outer membrane, presumably at the level of PSC. Among the peptides active on PSC, several, such as pCyt OX IV (1-22) and the reduced form of the mast cell degranulating peptide, induce an alteration of the voltage dependence or of the inactivation rate subsisting after washing and which is eliminated only by proteolysis of the interacting peptide. These irreversible effects may account for the variability of the properties of the PSC which would interact with cytosolic or intermembrane cations, peptides, or proteins, thus modulating the channel permeability. Finally, several lines of evidence suggest the participation of the PSC in protein translocation and some interaction with the general insertion pore of the outer membrane translocation machinery.
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Affiliation(s)
- J P Henry
- Centre National de la Recherche Scientifique, Service de Neurobiologie Physico-Chimique, Institut de Biologie Physico-Chimique, Paris, France
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Anzidei L, Cecchi P, Cevolani S, Gallina M, Petrizzi L, Rado V, Talarico C, Violante V, Vettraino V, Zampaglione V, Proust E, Giancarli L, Raepsaet X, Szczepanski J, Vallette F, Baraer L, Bielak B, Mercier J. First adaptation of the European ceramic B.I.T. blanket design to the updated DEMO specifications. Fusion Engineering and Design 1991. [DOI: 10.1016/0920-3796(91)90045-r] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Cevolani S, Proust E, Vallette F. Thermal hydraulic analysis of the basic breeder module of the European ceramic BIT DEMO blanket. Fusion Engineering and Design 1991. [DOI: 10.1016/0920-3796(91)90048-u] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Vallette F. [The diet of children with cystic fibrosis]. Soins Gynecol Obstet Pueric Pediatr 1989:29-31. [PMID: 2623473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Abstract
In the polymerase chain reaction (PCR) the specific amplification of a small segment of DNA within a complex DNA sample is effected by repeated cycles of DNA denaturation and enzymatic synthesis primed by two oligonucleotides complementary to regions within opposite strands of the DNA. In this report a simple and efficient method is described in which PCR methodology is used to introduce specific mutations into a double stranded DNA molecule. In this procedure a supercoiled plasmid DNA serves as template for a PCR in which a primer bearing the mutated sequence is incorporated into the amplified product. The presence of convenient restriction sites in the mutagenic primer and in the amplified DNA permit direct replacement of a wild type DNA segment with the mutated segment by treating the PCR mixture with the appropriate restriction endonucleases followed by DNA ligase. Using this procedure, a single amino acid replacement, a 16 amino acid deletion and a replacement of four amino acids with a twelve amino acid segment from another membrane protein were introduced into the amino terminal signal segment of rat hepatic cytochrome P450b (P450IIB1).
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Affiliation(s)
- F Vallette
- Department of Cell Biology, New York University School of Medicine 10016
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Sikorav JL, Vallette F, Grassi J, Massoulié J. Isolation of a cDNA clone for a catalytic subunit of Torpedo marmorata acetylcholinesterase. FEBS Lett 1985; 193:159-63. [PMID: 2415396 DOI: 10.1016/0014-5793(85)80142-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We have constructed a cDNA library from Torpedo marmorata electric organ poly(A+) RNA in the lambda phage expression vector lambda gt11. This library has been screened with polyclonal anti-acetylcholinesterase antibodies. One clone, lambda AChE1, produced a fusion protein which was recognized by the antibodies and which prevented the binding of native acetylcholinesterase in an enzymatic immune assay. These results indicate that lambda AChE1 contains a cDNA insert coding for a part of a catalytic subunit of Torpedo acetylcholinesterase. The 200-base-pair cDNA insert hybridized to three mRNAs (14.5, 10.5 and 5.5 kb) from Torpedo electric organs. These mRNAs were also detected in Torpedo electric lobes.
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