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Giroud J, Bouriez I, Paulus H, Pourtier A, Debacq-Chainiaux F, Pluquet O. Exploring the Communication of the SASP: Dynamic, Interactive, and Adaptive Effects on the Microenvironment. Int J Mol Sci 2023; 24:10788. [PMID: 37445973 DOI: 10.3390/ijms241310788] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 06/20/2023] [Accepted: 06/25/2023] [Indexed: 07/15/2023] Open
Abstract
Cellular senescence is a complex cell state that can occur during physiological ageing or after exposure to stress signals, regardless of age. It is a dynamic process that continuously evolves in a context-dependent manner. Senescent cells interact with their microenvironment by producing a heterogenous and plastic secretome referred to as the senescence-associated secretory phenotype (SASP). Hence, understanding the cross-talk between SASP and the microenvironment can be challenging due to the complexity of signal exchanges. In this review, we first aim to update the definition of senescence and its associated biomarkers from its discovery to the present day. We detail the regulatory mechanisms involved in the expression of SASP at multiple levels and develop how SASP can orchestrate microenvironment modifications, by focusing on extracellular matrix modifications, neighboring cells' fate, and intercellular communications. We present hypotheses on how these microenvironmental events may affect dynamic changes in SASP composition in return. Finally, we discuss the various existing approaches to targeting SASP and clarify what is currently known about the biological effects of these modified SASPs on the cellular environment.
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Affiliation(s)
- Joëlle Giroud
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, 5000 Namur, Belgium
- University of Lille, CNRS, Inserm, Pasteur Institute of Lille, UMR9020-U1277-CANTHER-Cancer Heterogeneity Plasticity and Resistance to Therapies, 59000 Lille, France
| | - Inès Bouriez
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, 5000 Namur, Belgium
| | - Hugo Paulus
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, 5000 Namur, Belgium
| | - Albin Pourtier
- University of Lille, CNRS, Inserm, Pasteur Institute of Lille, UMR9020-U1277-CANTHER-Cancer Heterogeneity Plasticity and Resistance to Therapies, 59000 Lille, France
| | - Florence Debacq-Chainiaux
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, 5000 Namur, Belgium
| | - Olivier Pluquet
- University of Lille, CNRS, Inserm, Pasteur Institute of Lille, UMR9020-U1277-CANTHER-Cancer Heterogeneity Plasticity and Resistance to Therapies, 59000 Lille, France
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2
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Bauwens E, Parée T, Meurant S, Bouriez I, Hannart C, Wéra AC, Khelfi A, Fattaccioli A, Burteau S, Demazy C, Fransolet M, De Schutter C, Martin N, Théry J, Decanter G, Penel N, Bury M, Pluquet O, Garmyn M, Debacq-Chainiaux F. Senescence Induced by UVB in Keratinocytes Impairs Amino Acids Balance. J Invest Dermatol 2023; 143:554-565.e9. [PMID: 36528129 DOI: 10.1016/j.jid.2022.11.017] [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] [Received: 11/03/2021] [Revised: 10/19/2022] [Accepted: 11/08/2022] [Indexed: 12/23/2022]
Abstract
Skin is one of the most exposed organs to external stress. Namely, UV rays are the most harmful stress that could induce important damage leading to skin aging and cancers. At the cellular level, senescence is observed in several skin cell types and contributes to skin aging. However, the origin of skin senescent cells is still unclear but is probably related to exposure to stresses. In this work, we developed an in vitro model of UVB-induced premature senescence in normal human epidermal keratinocytes. UVB-induced senescent keratinocytes display a common senescent phenotype resulting in an irreversible cell cycle arrest, an increase in the proportion of senescence-associated β-galactosidase‒positive cells, unrepaired DNA damage, and a long-term DNA damage response activation. Moreover, UVB-induced senescent keratinocytes secrete senescence-associated secretory phenotype factors that influence cutaneous squamous cell carcinoma cell migration. Finally, a global transcriptomic study highlighted that senescent keratinocytes present a decrease in the expression of several amino acid transporters, which is associated with reduced intracellular levels of glycine, alanine, and leucine. Interestingly, the chemical inhibition of the glycine transporter SLC6A9/Glyt1 triggers senescence features.
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Affiliation(s)
- Emilie Bauwens
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Tom Parée
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Sébastien Meurant
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Inès Bouriez
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Clotilde Hannart
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Anne-Catherine Wéra
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Alexis Khelfi
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Antoine Fattaccioli
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Sophie Burteau
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Catherine Demazy
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Maude Fransolet
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Clémentine De Schutter
- University of Lille, CNRS, Inserm, Pasteur Institute of Lille, UMR9020-U1277-CANTHER-Cancer Heterogeneity Plasticity and Resistance to Therapies, Lille, France
| | - Nathalie Martin
- University of Lille, CNRS, Inserm, Pasteur Institute of Lille, UMR9020-U1277-CANTHER-Cancer Heterogeneity Plasticity and Resistance to Therapies, Lille, France
| | - Julien Théry
- Direction of Clinical Research and Innovation, Oscar Lambret Center, Lille, France
| | - Gauthier Decanter
- Direction of Clinical Research and Innovation, Oscar Lambret Center, Lille, France
| | - Nicolas Penel
- Direction of Clinical Research and Innovation, Oscar Lambret Center, Lille, France
| | - Marina Bury
- De Duve Institute, UCLouvain, Bruxelles, Belgium
| | - Olivier Pluquet
- University of Lille, CNRS, Inserm, Pasteur Institute of Lille, UMR9020-U1277-CANTHER-Cancer Heterogeneity Plasticity and Resistance to Therapies, Lille, France
| | - Marjan Garmyn
- Department of Dermatology, University Hospitals Leuven, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Florence Debacq-Chainiaux
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium.
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3
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Lhomond S, Avril T, Dejeans N, Voutetakis K, Doultsinos D, McMahon M, Pineau R, Obacz J, Papadodima O, Jouan F, Bourien H, Logotheti M, Jégou G, Pallares‐Lupon N, Schmit K, Le Reste P, Etcheverry A, Mosser J, Barroso K, Vauléon E, Maurel M, Samali A, Patterson JB, Pluquet O, Hetz C, Quillien V, Chatziioannou A, Chevet E. Dual IRE1 RNase functions dictate glioblastoma development. EMBO Mol Med 2023; 15:e16731. [PMID: 36752056 PMCID: PMC9906329 DOI: 10.15252/emmm.202216731] [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] [Received: 08/12/2022] [Accepted: 12/06/2022] [Indexed: 02/09/2023] Open
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4
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Goy E, Tomezak M, Facchin C, Martin N, Bouchaert E, Benoit J, de Schutter C, Nassour J, Saas L, Drullion C, Brodin PM, Vandeputte A, Molendi-Coste O, Pineau L, Goormachtigh G, Pluquet O, Pourtier A, Cleri F, Lartigau E, Penel N, Abbadie C. The out-of-field dose in radiation therapy induces delayed tumorigenesis by senescence evasion. eLife 2022; 11:67190. [PMID: 35302491 PMCID: PMC8933005 DOI: 10.7554/elife.67190] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 02/03/2021] [Accepted: 02/15/2022] [Indexed: 11/13/2022] Open
Abstract
A rare but severe complication of curative-intent radiation therapy is the induction of second primary cancers. These cancers preferentially develop not inside the planning target volume (PTV) but around, over several centimeters, after a latency period of 1–40 years. We show here that normal human or mouse dermal fibroblasts submitted to the out-of-field dose scattering at the margin of a PTV receiving a mimicked patient’s treatment do not die but enter in a long-lived senescent state resulting from the accumulation of unrepaired DNA single-strand breaks, in the almost absence of double-strand breaks. Importantly, a few of these senescent cells systematically and spontaneously escape from the cell cycle arrest after a while to generate daughter cells harboring mutations and invasive capacities. These findings highlight single-strand break-induced senescence as the mechanism of second primary cancer initiation, with clinically relevant spatiotemporal specificities. Senescence being pharmacologically targetable, they open the avenue for second primary cancer prevention.
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Affiliation(s)
- Erwan Goy
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France
| | - Maxime Tomezak
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France.,Univ. Lille, CNRS, UMR8520, Institut d'Electronique, Microélectronique et Nanotechnologie, F-59652 Villeneuve d'Ascq, France
| | - Caterina Facchin
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France
| | - Nathalie Martin
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France
| | - Emmanuel Bouchaert
- Oncovet Clinical Research, Plateforme PRECI, F-59120 Loos, France.,Oncovet, Plateforme PRECI, F-59650 Villeneuve d'Ascq, France
| | - Jerome Benoit
- Oncovet Clinical Research, Plateforme PRECI, F-59120 Loos, France.,Oncovet, Plateforme PRECI, F-59650 Villeneuve d'Ascq, France
| | - Clementine de Schutter
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France
| | - Joe Nassour
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France
| | - Laure Saas
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France
| | - Claire Drullion
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France
| | - Priscille M Brodin
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000 Lille, France
| | - Alexandre Vandeputte
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000 Lille, France
| | - Olivier Molendi-Coste
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011 - EGID, F-59000 Lille, France
| | - Laurent Pineau
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011 - EGID, F-59000 Lille, France
| | - Gautier Goormachtigh
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France
| | - Olivier Pluquet
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France
| | - Albin Pourtier
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France
| | - Fabrizio Cleri
- Univ. Lille, CNRS, UMR8520, Institut d'Electronique, Microélectronique et Nanotechnologie, F-59652 Villeneuve d'Ascq, France
| | - Eric Lartigau
- Lille University, Medical School and Centre Oscar Lambret, Lille, France
| | - Nicolas Penel
- Lille University, Medical School and Centre Oscar Lambret, Lille, France
| | - Corinne Abbadie
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France
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5
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Lhomond S, Avril T, Dejeans N, Voutetakis K, Doultsinos D, McMahon M, Pineau R, Obacz J, Papadodima O, Jouan F, Bourien H, Logotheti M, Jégou G, Pallares-Lupon N, Schmit K, Le Reste PJ, Etcheverry A, Mosser J, Barroso K, Vauléon E, Maurel M, Samali A, Patterson JB, Pluquet O, Hetz C, Quillien V, Chatziioannou A, Chevet E. Dual IRE1 RNase functions dictate glioblastoma development. EMBO Mol Med 2022; 14:e15622. [PMID: 35014200 DOI: 10.15252/emmm.202115622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 12/21/2021] [Indexed: 11/09/2022] Open
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6
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Abstract
Senescence is a cellular state which can be viewed as a stress response phenotype implicated in various physiological and pathological processes, including cancer. Therefore, it is of fundamental importance to understand why and how a cell acquires and maintains a senescent phenotype. Direct evidence has pointed to the homeostasis of the endoplasmic reticulum whose control appears strikingly affected during senescence. The endoplasmic reticulum is one of the sensing organelles that transduce signals between different pathways in order to adapt a functional proteome upon intrinsic or extrinsic challenges. One of these signaling pathways is the Unfolded Protein Response (UPR), which has been shown to be activated during senescence. Its exact contribution to senescence onset, maintenance, and escape, however, is still poorly understood. In this article, we review the mechanisms through which the UPR contributes to the appearance and maintenance of characteristic senescent features. We also discuss whether the perturbation of the endoplasmic reticulum proteostasis or accumulation of misfolded proteins could be possible causes of senescence, and-as a consequence-to what extent the UPR components could be considered as therapeutic targets allowing for the elimination of senescent cells or altering their secretome to prevent neoplastic transformation.
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Affiliation(s)
- Olivier Pluquet
- Univ Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277-CANTHER-Cancer Heterogeneity Plasticity and Resistance to Therapies, Lille, France.
| | - Corinne Abbadie
- Univ Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277-CANTHER-Cancer Heterogeneity Plasticity and Resistance to Therapies, Lille, France
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7
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Abbadie C, Pluquet O. Unfolded Protein Response (UPR) Controls Major Senescence Hallmarks. Trends Biochem Sci 2020; 45:371-374. [DOI: 10.1016/j.tibs.2020.02.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 02/07/2020] [Accepted: 02/10/2020] [Indexed: 01/26/2023]
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8
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Pluquet O, Galmiche A. Impact and Relevance of the Unfolded Protein Response in HNSCC. Int J Mol Sci 2019; 20:ijms20112654. [PMID: 31151143 PMCID: PMC6601021 DOI: 10.3390/ijms20112654] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 05/27/2019] [Accepted: 05/27/2019] [Indexed: 12/12/2022] Open
Abstract
Head and neck squamous cell carcinomas (HNSCC) encompass a heterogeneous group of solid tumors that arise from the upper aerodigestive tract. The tumor cells face multiple challenges including an acute demand of protein synthesis often driven by oncogene activation, limited nutrient and oxygen supply and exposure to chemo/radiotherapy, which forces them to develop adaptive mechanisms such as the Unfolded Protein Response (UPR). It is now well documented that the UPR, a homeostatic mechanism, is induced at different stages of cancer progression in response to intrinsic (oncogenic activation) or extrinsic (microenvironment) perturbations. This review will discuss the role of the UPR in HNSCC as well as in the key processes that characterize the physiology of HNSCC. The role of the UPR in the clinical context of HNSCC will also be addressed.
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Affiliation(s)
- Olivier Pluquet
- Institut Pasteur de Lille, Université de Lille, CNRS, UMR8161-M3T-Mechanisms of Tumorigenesis and Targeted Therapies, F-59000 Lille, France.
| | - Antoine Galmiche
- Service de Biochimie, Centre de Biologie Humaine (CBH), CHU Sud, 80054 Amiens, France.
- EA7516, Université de Picardie Jules Verne (UPJV), 80054 Amiens, France.
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9
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Drullion C, Marot G, Martin N, Desle J, Saas L, Salazar-Cardozo C, Bouali F, Pourtier A, Abbadie C, Pluquet O. Pre-malignant transformation by senescence evasion is prevented by the PERK and ATF6alpha branches of the Unfolded Protein Response. Cancer Lett 2018; 438:187-196. [DOI: 10.1016/j.canlet.2018.09.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 09/06/2018] [Accepted: 09/07/2018] [Indexed: 10/28/2022]
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10
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Papaioannou A, Higa A, Jégou G, Jouan F, Pineau R, Saas L, Avril T, Pluquet O, Chevet E. Alterations of
EDEM
1 functions enhance
ATF
6 pro‐survival signaling. FEBS J 2018; 285:4146-4164. [DOI: 10.1111/febs.14669] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 08/31/2018] [Accepted: 09/28/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Alexandra Papaioannou
- INSERM U1242 Université de Rennes France
- Centre de Lutte Contre le Cancer Eugène Marquis Rennes France
| | - Arisa Higa
- INSERM U1242 Université de Rennes France
| | - Gwénaële Jégou
- INSERM U1242 Université de Rennes France
- Centre de Lutte Contre le Cancer Eugène Marquis Rennes France
| | - Florence Jouan
- INSERM U1242 Université de Rennes France
- Centre de Lutte Contre le Cancer Eugène Marquis Rennes France
| | - Raphael Pineau
- INSERM U1242 Université de Rennes France
- Centre de Lutte Contre le Cancer Eugène Marquis Rennes France
| | - Laure Saas
- CNRS Institut Pasteur de Lille UMR8161 – M3T – Mechanisms of Tumorigenesis and Targeted Therapies Univ. Lille France
| | - Tony Avril
- INSERM U1242 Université de Rennes France
- Centre de Lutte Contre le Cancer Eugène Marquis Rennes France
| | - Olivier Pluquet
- CNRS Institut Pasteur de Lille UMR8161 – M3T – Mechanisms of Tumorigenesis and Targeted Therapies Univ. Lille France
| | - Eric Chevet
- INSERM U1242 Université de Rennes France
- Centre de Lutte Contre le Cancer Eugène Marquis Rennes France
- CNRS Institut Pasteur de Lille UMR8161 – M3T – Mechanisms of Tumorigenesis and Targeted Therapies Univ. Lille France
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11
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Lhomond S, Avril T, Dejeans N, Voutetakis K, Doultsinos D, McMahon M, Pineau R, Obacz J, Papadodima O, Jouan F, Bourien H, Logotheti M, Jégou G, Pallares‐Lupon N, Schmit K, Le Reste P, Etcheverry A, Mosser J, Barroso K, Vauléon E, Maurel M, Samali A, Patterson JB, Pluquet O, Hetz C, Quillien V, Chatziioannou A, Chevet E. Dual IRE1 RNase functions dictate glioblastoma development. EMBO Mol Med 2018; 10:emmm.201707929. [PMID: 29311133 PMCID: PMC5840541 DOI: 10.15252/emmm.201707929] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [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] [Indexed: 12/31/2022] Open
Abstract
Proteostasis imbalance is emerging as a major hallmark of cancer, driving tumor aggressiveness. Evidence suggests that the endoplasmic reticulum (ER), a major site for protein folding and quality control, plays a critical role in cancer development. This concept is valid in glioblastoma multiform (GBM), the most lethal primary brain cancer with no effective treatment. We previously demonstrated that the ER stress sensor IRE1α (referred to as IRE1) contributes to GBM progression, through XBP1 mRNA splicing and regulated IRE1-dependent decay (RIDD) of RNA Here, we first demonstrated IRE1 signaling significance to human GBM and defined specific IRE1-dependent gene expression signatures that were confronted to human GBM transcriptomes. This approach allowed us to demonstrate the antagonistic roles of XBP1 mRNA splicing and RIDD on tumor outcomes, mainly through selective remodeling of the tumor stroma. This study provides the first demonstration of a dual role of IRE1 downstream signaling in cancer and opens a new therapeutic window to abrogate tumor progression.
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Affiliation(s)
| | - Tony Avril
- INSERM U1242, “Chemistry, Oncogenesis, Stress, Signaling”Université de Rennes 1RennesFrance,Centre de Lutte Contre le Cancer Eugène MarquisRennesFrance
| | | | - Konstantinos Voutetakis
- Institute of Biology, Medicinal Chemistry & BiotechnologyNHRFAthensGreece,Department of Biochemistry & BiotechnologyUniversity of ThessalyLarissaGreece
| | - Dimitrios Doultsinos
- INSERM U1242, “Chemistry, Oncogenesis, Stress, Signaling”Université de Rennes 1RennesFrance,Centre de Lutte Contre le Cancer Eugène MarquisRennesFrance
| | - Mari McMahon
- INSERM U1242, “Chemistry, Oncogenesis, Stress, Signaling”Université de Rennes 1RennesFrance,Centre de Lutte Contre le Cancer Eugène MarquisRennesFrance,Apoptosis Research CentreSchool of Natural SciencesNUI GalwayGalwayIreland
| | - Raphaël Pineau
- INSERM U1242, “Chemistry, Oncogenesis, Stress, Signaling”Université de Rennes 1RennesFrance,Centre de Lutte Contre le Cancer Eugène MarquisRennesFrance
| | - Joanna Obacz
- INSERM U1242, “Chemistry, Oncogenesis, Stress, Signaling”Université de Rennes 1RennesFrance,Centre de Lutte Contre le Cancer Eugène MarquisRennesFrance
| | - Olga Papadodima
- Institute of Biology, Medicinal Chemistry & BiotechnologyNHRFAthensGreece
| | - Florence Jouan
- INSERM U1242, “Chemistry, Oncogenesis, Stress, Signaling”Université de Rennes 1RennesFrance,Centre de Lutte Contre le Cancer Eugène MarquisRennesFrance
| | - Heloise Bourien
- INSERM U1242, “Chemistry, Oncogenesis, Stress, Signaling”Université de Rennes 1RennesFrance,Centre de Lutte Contre le Cancer Eugène MarquisRennesFrance
| | - Marianthi Logotheti
- Institute of Biology, Medicinal Chemistry & BiotechnologyNHRFAthensGreece,e‐NIOS PCKallithea‐AthensGreece
| | - Gwénaële Jégou
- INSERM U1242, “Chemistry, Oncogenesis, Stress, Signaling”Université de Rennes 1RennesFrance,Centre de Lutte Contre le Cancer Eugène MarquisRennesFrance
| | | | | | - Pierre‐Jean Le Reste
- INSERM U1242, “Chemistry, Oncogenesis, Stress, Signaling”Université de Rennes 1RennesFrance,Department of NeurosurgeryUniversity Hospital PontchaillouRennesFrance
| | - Amandine Etcheverry
- Integrated Functional Genomics and Biomarkers TeamUMR6290, CNRSUniversité de Rennes 1RennesFrance
| | - Jean Mosser
- Integrated Functional Genomics and Biomarkers TeamUMR6290, CNRSUniversité de Rennes 1RennesFrance
| | - Kim Barroso
- INSERM U1242, “Chemistry, Oncogenesis, Stress, Signaling”Université de Rennes 1RennesFrance,Centre de Lutte Contre le Cancer Eugène MarquisRennesFrance
| | - Elodie Vauléon
- INSERM U1242, “Chemistry, Oncogenesis, Stress, Signaling”Université de Rennes 1RennesFrance,Centre de Lutte Contre le Cancer Eugène MarquisRennesFrance
| | - Marion Maurel
- INSERM U1242, “Chemistry, Oncogenesis, Stress, Signaling”Université de Rennes 1RennesFrance,Centre de Lutte Contre le Cancer Eugène MarquisRennesFrance,Apoptosis Research CentreSchool of Natural SciencesNUI GalwayGalwayIreland
| | - Afshin Samali
- Apoptosis Research CentreSchool of Natural SciencesNUI GalwayGalwayIreland
| | | | - Olivier Pluquet
- Institut Pasteur de LilleCNRS UMR8161 “Mechanisms of Tumourigenesis and Targeted Therapies”Université de LilleLilleFrance
| | - Claudio Hetz
- Biomedical Neuroscience InstituteFaculty of MedicineUniversity of ChileSantiagoChile,Program of Cellular and Molecular BiologyInstitute of Biomedical SciencesUniversity of ChileSantiagoChile,Center for Geroscience, Brain Health and MetabolismSantiagoChile,Buck Institute for Research on AgingNovatoCAUSA,Department of Immunology and Infectious diseasesHarvard School of Public HealthBostonMAUSA
| | - Véronique Quillien
- INSERM U1242, “Chemistry, Oncogenesis, Stress, Signaling”Université de Rennes 1RennesFrance,Centre de Lutte Contre le Cancer Eugène MarquisRennesFrance
| | - Aristotelis Chatziioannou
- Institute of Biology, Medicinal Chemistry & BiotechnologyNHRFAthensGreece,e‐NIOS PCKallithea‐AthensGreece
| | - Eric Chevet
- INSERM U1242, “Chemistry, Oncogenesis, Stress, Signaling”Université de Rennes 1RennesFrance,Centre de Lutte Contre le Cancer Eugène MarquisRennesFrance
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Nassour J, Martien S, Martin N, Deruy E, Tomellini E, Malaquin N, Bouali F, Sabatier L, Wernert N, Pinte S, Gilson E, Pourtier A, Pluquet O, Abbadie C. Defective DNA single-strand break repair is responsible for senescence and neoplastic escape of epithelial cells. Nat Commun 2016; 7:10399. [PMID: 26822533 PMCID: PMC4740115 DOI: 10.1038/ncomms10399] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 12/08/2015] [Indexed: 12/22/2022] Open
Abstract
The main characteristic of senescence is its stability which relies on the persistence of DNA damage. We show that unlike fibroblasts, senescent epithelial cells do not activate an ATM-or ATR-dependent DNA damage response (DDR), but accumulate oxidative-stress-induced DNA single-strand breaks (SSBs). These breaks remain unrepaired because of a decrease in PARP1 expression and activity. This leads to the formation of abnormally large and persistent XRCC1 foci that engage a signalling cascade involving the p38MAPK and leading to p16 upregulation and cell cycle arrest. Importantly, the default in SSB repair also leads to the emergence of post-senescent transformed and mutated precancerous cells. In human-aged skin, XRCC1 foci accumulate in the epidermal cells in correlation with a decline of PARP1, whereas DDR foci accumulate mainly in dermal fibroblasts. These findings point SSBs as a DNA damage encountered by epithelial cells with aging which could fuel the very first steps of carcinogenesis.
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Affiliation(s)
- Joe Nassour
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000 Lille, France
| | - Sébastien Martien
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000 Lille, France
| | - Nathalie Martin
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000 Lille, France
| | - Emeric Deruy
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000 Lille, France
| | - Elisa Tomellini
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000 Lille, France
| | - Nicolas Malaquin
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000 Lille, France
| | - Fatima Bouali
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000 Lille, France
| | - Laure Sabatier
- Commissariat à l'Energie Atomique (CEA), Laboratoire de Radiobiologie et Oncologie (LRO), 18 route du Panorama - BP6, 92265 Fontenay-aux-Roses 53011, France
| | - Nicolas Wernert
- Institute of Pathology, University of Bonn, 53011 Bonn, Germany
| | - Sébastien Pinte
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000 Lille, France.,Institute for Research on Cancer and Aging, Nice (IRCAN), University of Nice Sophia Antipolis, CNRS, UMR7284, INSERM U108, Faculty of Medecine of Nice; CHU of Nice, Nice, France
| | - Eric Gilson
- Institute for Research on Cancer and Aging, Nice (IRCAN), University of Nice Sophia Antipolis, CNRS, UMR7284, INSERM U108, Faculty of Medecine of Nice; CHU of Nice, Nice, France
| | - Albin Pourtier
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000 Lille, France
| | - Olivier Pluquet
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000 Lille, France
| | - Corinne Abbadie
- Univ. Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T - Mechanisms of Tumorigenesis and Targeted Therapies, F-59000 Lille, France
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13
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Houessinon A, Gicquel A, Bochereau F, Louandre C, Nyga R, Godin C, Degonville J, Fournier E, Saidak Z, Drullion C, Barbare JC, Chauffert B, François C, Pluquet O, Galmiche A. Alpha-fetoprotein is a biomarker of unfolded protein response and altered proteostasis in hepatocellular carcinoma cells exposed to sorafenib. Cancer Lett 2016; 370:242-9. [DOI: 10.1016/j.canlet.2015.10.032] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 10/26/2015] [Accepted: 10/26/2015] [Indexed: 02/06/2023]
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Pluquet O, Pourtier A, Abbadie C. The unfolded protein response and cellular senescence. A review in the theme: cellular mechanisms of endoplasmic reticulum stress signaling in health and disease. Am J Physiol Cell Physiol 2014; 308:C415-25. [PMID: 25540175 DOI: 10.1152/ajpcell.00334.2014] [Citation(s) in RCA: 191] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The endoplasmic reticulum (ER) is a multifunctional organelle critical for the proper folding and assembly of secreted and transmembrane proteins. Perturbations of ER functions cause ER stress, which activates a coordinated system of transcriptional and translational controls called the unfolded protein response (UPR), to cope with accumulation of misfolded proteins and proteotoxicity. It results in ER homeostasis restoration or in cell death. Senescence is a complex cell phenotype induced by several stresses such as telomere attrition, DNA damage, oxidative stress, and activation of some oncogenes. It is mainly characterized by a cell enlargement, a permanent cell-cycle arrest, and the production of a secretome enriched in proinflammatory cytokines and components of the extracellular matrix. Senescent cells accumulate with age in tissues and are suspected to play a role in age-associated diseases. Since senescence is a stress response, the question arises of whether an ER stress could occur concomitantly with senescence and participate in the onset or maintenance of the senescent features. Here, we described the interconnections between the UPR signaling and the different aspects of the cellular senescence programs and discuss the implication of UPR modulations in this context.
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Affiliation(s)
- Olivier Pluquet
- Centre National de la Recherche Scientifique, UMR8161, Institut de Biologie de Lille, Lille, France; Université Lille 1 Sciences et Techniques, Villeneuve d'Ascq, France; Université Lille 2 Droit et Santé, Lille, France; and Institut Pasteur de Lille, Lille, France
| | - Albin Pourtier
- Centre National de la Recherche Scientifique, UMR8161, Institut de Biologie de Lille, Lille, France; Université Lille 1 Sciences et Techniques, Villeneuve d'Ascq, France; Université Lille 2 Droit et Santé, Lille, France; and Institut Pasteur de Lille, Lille, France
| | - Corinne Abbadie
- Centre National de la Recherche Scientifique, UMR8161, Institut de Biologie de Lille, Lille, France; Université Lille 1 Sciences et Techniques, Villeneuve d'Ascq, France; Université Lille 2 Droit et Santé, Lille, France; and Institut Pasteur de Lille, Lille, France
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Martin N, Salazar-Cardozo C, Vercamer C, Ott L, Marot G, Slijepcevic P, Abbadie C, Pluquet O. Identification of a gene signature of a pre-transformation process by senescence evasion in normal human epidermal keratinocytes. Mol Cancer 2014; 13:151. [PMID: 24929818 PMCID: PMC4065601 DOI: 10.1186/1476-4598-13-151] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 01/22/2014] [Accepted: 06/09/2014] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Epidemiological data show that the incidence of carcinomas in humans is highly dependent on age. However, the initial steps of the age-related molecular oncogenic processes by which the switch towards the neoplastic state occurs remain poorly understood, mostly due to the absence of powerful models. In a previous study, we showed that normal human epidermal keratinocytes (NHEKs) spontaneously and systematically escape from senescence to give rise to pre-neoplastic emerging cells. METHODS Here, this model was used to analyze the gene expression profile associated with the early steps of age-related cell transformation. We compared the gene expression profiles of growing or senescent NHEKs to post-senescent emerging cells. Data analyses were performed by using the linear modeling features of the limma package, resulting in a two-sided t test or F-test based on moderated statistics. The p-values were adjusted for multiple testing by controlling the false discovery rate according to Benjamini Hochberg method.The common gene set resulting of differential gene expression profiles from these two comparisons revealed a post-senescence neoplastic emergence (PSNE) gene signature of 286 genes. RESULTS About half of these genes were already reported as involved in cancer or premalignant skin diseases. However, bioinformatics analyses did not highlight inside this signature canonical cancer pathways but metabolic pathways, including in first line the metabolism of xenobiotics by cytochrome P450. In order to validate the relevance of this signature as a signature of pretransformation by senescence evasion, we invalidated two components of the metabolism of xenobiotics by cytochrome P450, AKR1C2 and AKR1C3. When performed at the beginning of the senescence plateau, this invalidation did not alter the senescent state itself but significantly decreased the frequency of PSNE. Conversely, overexpression of AKR1C2 but not AKR1C3 increased the frequency of PSNE. CONCLUSIONS To our knowledge, this study is the first to identify reprogrammation of metabolic pathways in normal keratinocytes as a potential determinant of the switch from senescence to pre-transformation.
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Affiliation(s)
| | | | | | | | | | | | | | - Olivier Pluquet
- CNRS, UMR8161, Institut de Biologie de Lille, 1 rue Calmette, 59000 Lille, France.
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Abstract
In the past 20 years both the circadian clock and endoplasmic reticulum (ER) stress signaling have emerged as major players in oncogenesis and cancer development. Although several lines of evidence have established functional links between these two molecular pathways, their interconnection and the subsequent functional implications in cancer development remain to be fully characterized. Herein, we provide an extensive review of the literature depicting the molecular connectivity linking ER stress signaling and the circadian clock and elaborate on the potential use of these functional interactions in cancer therapeutics.
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Affiliation(s)
- Olivier Pluquet
- Institut de Biologie de Lille, CNRS UMR8161/Universités Lille 1 et Lille 2/Institut Pasteur de Lille , 1, rue du Pr. Calmette, BP 447, 59021 Lille , France
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Martien S, Pluquet O, Vercamer C, Malaquin N, Martin N, Gosselin K, Pourtier A, Abbadie C. Cellular senescence involves an intracrine prostaglandin E2 pathway in human fibroblasts. Biochim Biophys Acta Mol Cell Biol Lipids 2013; 1831:1217-27. [DOI: 10.1016/j.bbalip.2013.04.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Pluquet O, Dejeans N, Bouchecareilh M, Lhomond S, Pineau R, Higa A, Delugin M, Combe C, Loriot S, Cubel G, Dugot-Senant N, Vital A, Loiseau H, Gosline SJC, Taouji S, Hallett M, Sarkaria JN, Anderson K, Wu W, Rodriguez FJ, Rosenbaum J, Saltel F, Fernandez-Zapico ME, Chevet E. Posttranscriptional regulation of PER1 underlies the oncogenic function of IREα. Cancer Res 2013; 73:4732-43. [PMID: 23752693 DOI: 10.1158/0008-5472.can-12-3989] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Growing evidence supports a role for the unfolded protein response (UPR) in carcinogenesis; however, the precise molecular mechanisms underlying this phenomenon remain elusive. Herein, we identified the circadian clock PER1 mRNA as a novel substrate of the endoribonuclease activity of the UPR sensor IRE1α. Analysis of the mechanism shows that IRE1α endoribonuclease activity decreased PER1 mRNA in tumor cells without affecting PER1 gene transcription. Inhibition of IRE1α signaling using either siRNA-mediated silencing or a dominant-negative strategy prevented PER1 mRNA decay, reduced tumorigenesis, and increased survival, features that were reversed upon PER1 silencing. Clinically, patients showing reduced survival have lower levels of PER1 mRNA expression and increased splicing of XBP1, a known IRE-α substrate, thereby pointing toward an increased IRE1α activity in these patients. Hence, we describe a novel mechanism connecting the UPR and circadian clock components in tumor cells, thereby highlighting the importance of this interplay in tumor development.
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Affiliation(s)
- Olivier Pluquet
- Inserm U1053, University of Bordeaux, 146 rue Leo Saignat, 33076 Bordeaux Cedex, France
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Dejeans N, Pluquet O, Lhomond S, Grise F, Bouchecareilh M, Juin A, Meynard-Cadars M, Bidaud-Meynard A, Gentil C, Moreau V, Saltel F, Chevet E. Autocrine control of glioma cells adhesion/migration through Inositol Requiring enzyme 1α (IRE1α)-mediated cleavage of Secreted Protein Acidic Rich in Cysteine (SPARC) mRNA. J Cell Sci 2012; 125:4278-87. [DOI: 10.1242/jcs.099291] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The endoplasmic reticulum (ER) is an organelle specialized for the folding and assembly of secretory and transmembrane proteins. ER homeostasis is often perturbed in tumor cells due to dramatic changes in solid tumor microenvironment, thereby leading to the activation of an adaptive mechanism named the Unfolded Protein Response (UPR). The activation of the UPR sensor IRE1α has been described to play an important role in tumor progression. However, the molecular events associated with this phenotype remain poorly characterized. In the present study, we examined the effects of IRE1α signaling on glioma cells adaptation to their microenvironment. We show that the characteristics of U87 cells migration are modified under conditions where IRE1α activity is impaired (DN_IRE1). This is linked to increased stress fiber formation and enhanced RhoA activity. Gene expression profiling also revealed that loss of functional IRE1α signaling mostly resulted in the up-regulation of genes encoding extracellular matrix proteins. Among these genes, SPARC, whose mRNA is a direct target of IRE1α endoribonuclease activity, was in part responsible for the phenotypic changes associated with IRE1α inactivation. Hence, our data demonstrate that IRE1α is a key regulator of SPARC expression in vitro in a glioma model. Our results also further support the critical role of IRE1α contribution to tumor growth and infiltration/invasion and extend the paradigm of secretome control in tumor microenvironment conditioning.
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Bouchecareilh M, Caruso ME, Roby P, Parent S, Rouleau N, Taouji S, Pluquet O, Bossé R, Moenner M, Chevet E. AlphaScreen®-Based Characterization of the Bifunctional Kinase/RNase IRE1α. ACTA ACUST UNITED AC 2010; 15:406-17. [DOI: 10.1177/1087057110363823] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [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
Assay technologies that were originally developed for high-throughput screening (HTS) have recently proven useful in drug discovery for activities located upstream (target identification and validation) and downstream (ADMET) of HTS. Here the authors investigated and characterized the biological properties of a novel target, IRE1α, a bifunctional kinase/RNase stress sensor of the endoplasmic reticulum (ER). They have developed a novel assay platform using the HTS technology AlphaScreen® to monitor the dimerization/oligomerization and phosphorylation properties of the cytosolic domain of IRE1α. They show in vitro that dimerization/oligomerization of the cytosolic domain of IRE1 correlated with the autophosphorylation ability of this domain and its endoribonuclease activity toward XBP1 mRNA. Using orthogonal in vitro and cell-based approaches, the authors show that the results obtained using AlphaScreen® were biologically relevant. Preliminary characterization of assay robustness indicates that both AlphaScreen® assays should be useful in HTS for the identification of IRE1 activity modulators.
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Affiliation(s)
| | - Marie-Elaine Caruso
- Inserm, U889, Avenir, Bordeaux, France
- PerkinElmer Biosignal, Inc., Montreal, Quebec, Canada
| | - Philippe Roby
- PerkinElmer Biosignal, Inc., Montréal, Quebec, Canada
| | | | | | | | | | - Roger Bossé
- PerkinElmer Biosignal, Inc., Montréal, Quebec, Canada
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Cameron PH, Chevet E, Pluquet O, Thomas DY, Bergeron JJM. Calnexin phosphorylation attenuates the release of partially misfolded alpha1-antitrypsin to the secretory pathway. J Biol Chem 2009; 284:34570-9. [PMID: 19815548 DOI: 10.1074/jbc.m109.053165] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Calnexin is a type I integral membrane phosphoprotein resident of the endoplasmic reticulum. Its intraluminal domain has been deduced to function as a lectin chaperone coordinating the timing of folding of newly synthesized N-linked glycoproteins of the secretory pathway. Its C-terminal cytosolic oriented extension has an ERK1 phosphorylation site at Ser(563) affecting calnexin association with the translocon. Here we find an additional function for calnexin phosphorylation at Ser(563) in endoplasmic reticulum quality control. A low dose of the misfolding agent l-azetidine 2-carboxylic acid slows glycoprotein maturation and diminishes the extent and rate of secretion of newly synthesized secretory alpha1-antitrypsin. Under these conditions the phosphorylation of calnexin is enhanced at Ser(563). Inhibition of this phosphorylation by the MEK1 inhibitor PD98059 enhanced the extent and rate of alpha1-antitrypsin secretion comparable with that achieved by inhibiting alpha-mannosidase activity with kifunensine. This is the first report in which the phosphorylation of calnexin is linked to the efficiency of secretion of a cargo glycoprotein.
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Affiliation(s)
- Pamela H Cameron
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec H3A 2B2, Canada
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22
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Abstract
The endoplasmic reticulum (ER) has emerged as a major site of cellular homeostasis regulation, particularly in the unfolded protein response, which is being found to play a major role in cancer and many other diseases. Here, we address ER-mediated signaling and regulations in the context of environmental challenges in cancer, such as hypoxia, angiogenesis, and chemotherapeutic resistance, and we discuss how ER-resident molecular machines become deregulated and involved in cancer-related pathology. Further exploration of how the ER senses, signals, and adapts to stress may redefine and deepen our understanding of its functions in cancer pathobiology.
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Affiliation(s)
- Michel Moenner
- Institut National de la Sante et de la Recherche Medicale, E0113, Bordeaux, France
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Umareddy I, Pluquet O, Wang QY, Vasudevan SG, Chevet E, Gu F. Dengue virus serotype infection specifies the activation of the unfolded protein response. Virol J 2007; 4:91. [PMID: 17888185 PMCID: PMC2045667 DOI: 10.1186/1743-422x-4-91] [Citation(s) in RCA: 116] [Impact Index Per Article: 6.8] [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: 05/22/2007] [Accepted: 09/24/2007] [Indexed: 12/30/2022] Open
Abstract
Background Dengue and Dengue hemorrhagic fever have emerged as some of the most important mosquito-borne viral diseases in the tropics. The mechanisms of pathogenesis of Dengue remain elusive. Recently, virus-induced apoptosis mediated by the Unfolded Protein Response (UPR) has been hypothesised to represent a crucial pathogenic event in viral infection. In an attempt to evaluate the contribution of the UPR to virus replication, we have characterized each component of this signalling pathway following Dengue virus infection. Results We find that upon Dengue virus infection, A549 cells elicit an UPR which is observed at the level of translation attenuation (as visualized by the phosphorylation of eIF2alpha) and activation of specific pathways such as nuclear translocation of ATF-6 and splicing of XBP-1. Interestingly, we find that specific serotype of virus modulate the UPR with different selectivity. In addition, we demonstrate that perturbation of the UPR by preventing the dephosphorylation of the translation initiation factor eIF2alpha using Salubrinal considerably alters virus infectivity. Conclusion This report provides evidence that Dengue infection induces and regulates the three branches of the UPR signaling cascades. This is a basis for our understanding of the viral regulation and conditions beneficial to the viral infection. Furthermore, modulators of UPR such as Salubrinal that inhibit Dengue replication may open up an avenue toward cell-protective agents that target the endoplasmic reticulum for anti-viral therapy.
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Affiliation(s)
- Indira Umareddy
- Novartis Institute for Tropical Diseases, 10-Biopolis Road, #05-01 Chromos, 138670, Singapore
| | - Olivier Pluquet
- Team AVENIR, GREF INSERM U899, IFR66, Université Victor Segalen Bordeaux 2, 146 rue Léo Saignat, 33076 Bordeaux, France
| | - Qing Yin Wang
- Novartis Institute for Tropical Diseases, 10-Biopolis Road, #05-01 Chromos, 138670, Singapore
| | - Subhash G Vasudevan
- Novartis Institute for Tropical Diseases, 10-Biopolis Road, #05-01 Chromos, 138670, Singapore
| | - Eric Chevet
- Team AVENIR, GREF INSERM U899, IFR66, Université Victor Segalen Bordeaux 2, 146 rue Léo Saignat, 33076 Bordeaux, France
| | - Feng Gu
- Novartis Institute for Tropical Diseases, 10-Biopolis Road, #05-01 Chromos, 138670, Singapore
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Baltzis D, Pluquet O, Papadakis AI, Kazemi S, Qu LK, Koromilas AE. The eIF2alpha kinases PERK and PKR activate glycogen synthase kinase 3 to promote the proteasomal degradation of p53. J Biol Chem 2007; 282:31675-87. [PMID: 17785458 DOI: 10.1074/jbc.m704491200] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Phosphorylation of eukaryotic initiation factor 2alpha (eIF2alpha) is mediated by a family of kinases that respond to various forms of environmental stress. The eIF2alpha kinases are critical for mRNA translation, cell proliferation, and apoptosis. Activation of the tumor suppressor p53 results in cell cycle arrest and apoptosis in response to various types of stress. We previously showed that, unlike the majority of stress responses that stabilize and activate p53, induction of endoplasmic reticulum stress leads to p53 degradation through an Mdm2-dependent mechanism. Here, we demonstrate that the endoplasmic reticulum-resident eIF2alpha kinase PERK mediates the proteasomal degradation of p53 independently of translational control. This role is not specific for PERK, because the eIF2alpha kinase PKR also promotes p53 degradation in response to double-stranded RNA. We further establish that the eIF2alpha kinases induce glycogen synthase kinase 3 to promote the nuclear export and proteasomal degradation of p53. Our findings reveal a novel cross-talk between the eIF2alpha kinases and p53 with implications in cell proliferation and tumorigenesis.
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Affiliation(s)
- Dionissios Baltzis
- Lady Davis Institute for Medical Research, McGill University, Sir Mortimer B. Davis-Jewish General Hospital, Montreal, Quebec H3T 1E2, Canada
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Kazemi S, Mounir Z, Baltzis D, Raven JF, Wang S, Krishnamoorthy JL, Pluquet O, Pelletier J, Koromilas AE. A novel function of eIF2alpha kinases as inducers of the phosphoinositide-3 kinase signaling pathway. Mol Biol Cell 2007; 18:3635-44. [PMID: 17596516 PMCID: PMC1951772 DOI: 10.1091/mbc.e07-01-0053] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Phosphoinositide-3 kinase (PI3K) plays an important role in signal transduction in response to a wide range of cellular stimuli involved in cellular processes that promote cell proliferation and survival. Phosphorylation of the alpha subunit of the eukaryotic translation initiation factor eIF2 at Ser51 takes place in response to various types of environmental stress and is essential for regulation of translation initiation. Herein, we show that a conditionally active form of the eIF2alpha kinase PKR acts upstream of PI3K and turns on the Akt/PKB-FRAP/mTOR pathway leading to S6 and 4E-BP1 phosphorylation. Also, induction of PI3K signaling antagonizes the apoptotic and protein synthesis inhibitory effects of the conditionally active PKR. Furthermore, induction of the PI3K pathway is impaired in PKR(-/-) or PERK(-/-) mouse embryonic fibroblasts (MEFs) in response to various stimuli that activate each eIF2alpha kinase. Mechanistically, PI3K signaling activation is indirect and requires the inhibition of protein synthesis by eIF2alpha phosphorylation as demonstrated by the inactivation of endogenous eIF2alpha by small interfering RNA or utilization of MEFs bearing the eIF2alpha Ser51Ala mutation. Our data reveal a novel property of eIF2alpha kinases as activators of PI3K signaling and cell survival.
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Affiliation(s)
- Shirin Kazemi
- *Lady Davis Institute, Sir Mortimer B. Davis-Jewish General Hospital, Montréal, QC, Canada H3T 1E2; and
| | - Zineb Mounir
- *Lady Davis Institute, Sir Mortimer B. Davis-Jewish General Hospital, Montréal, QC, Canada H3T 1E2; and
| | - Dionissios Baltzis
- *Lady Davis Institute, Sir Mortimer B. Davis-Jewish General Hospital, Montréal, QC, Canada H3T 1E2; and
| | - Jennifer F. Raven
- *Lady Davis Institute, Sir Mortimer B. Davis-Jewish General Hospital, Montréal, QC, Canada H3T 1E2; and
| | - Shuo Wang
- *Lady Davis Institute, Sir Mortimer B. Davis-Jewish General Hospital, Montréal, QC, Canada H3T 1E2; and
| | | | - Olivier Pluquet
- *Lady Davis Institute, Sir Mortimer B. Davis-Jewish General Hospital, Montréal, QC, Canada H3T 1E2; and
| | - Jerry Pelletier
- Department of Biochemistry and McGill Cancer Center, Montréal, QC, Canada H3G 1Y6
| | - Antonis E. Koromilas
- *Lady Davis Institute, Sir Mortimer B. Davis-Jewish General Hospital, Montréal, QC, Canada H3T 1E2; and
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Baltzis D, Pluquet O, Koromilas AE. Activation of PKR promotes the nucleocytoplasmic export of p53. FASEB J 2006. [DOI: 10.1096/fasebj.20.4.a107-b] [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)
- Dionissios Baltzis
- Lady Davis Institute3755 Cote‐Ste‐Catherine StreetMontrealQuebecH3T 1E2Canada
| | - Olivier Pluquet
- Lady Davis Institute3755 Cote‐Ste‐Catherine StreetMontrealQuebecH3T 1E2Canada
| | - Antonis E Koromilas
- Lady Davis Institute3755 Cote‐Ste‐Catherine StreetMontrealQuebecH3T 1E2Canada
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Pluquet O, Qu LK, Baltzis D, Koromilas AE. Endoplasmic reticulum stress accelerates p53 degradation by the cooperative actions of Hdm2 and glycogen synthase kinase 3beta. Mol Cell Biol 2005; 25:9392-405. [PMID: 16227590 PMCID: PMC1265800 DOI: 10.1128/mcb.25.21.9392-9405.2005] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Inactivation of the tumor suppressor p53 by degradation is a mechanism utilized by cells to adapt to endoplasmic reticulum (ER) stress. However, the mechanisms of p53 destabilization by ER stress are not known. We demonstrate here that the E3 ubiquitin-ligase Hdm2 is essential for the nucleocytoplasmic transport and proteasome-dependent degradation of p53 in ER-stressed cells. We also demonstrate that p53 phosphorylation at S315 and S376 is required for its nuclear export and degradation by Hdm2 without interfering with the ubiquitylation process. Furthermore, we show that p53 destabilization in unstressed cells utilizes the cooperative action of Hdm2 and glycogen synthase kinase 3beta, a process that is enhanced in cells exposed to ER stress. In contrast to other stress pathways that stabilize p53, our findings further substantiate a negative role of ER stress in p53 activation with important implications for the function of the tumor suppressor in cells with a dysfunctional ER.
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Affiliation(s)
- Olivier Pluquet
- Lady Davis Institute for Medical Research, McGill University, Sir Mortimer B. Davis-Jewish General Hospital, 3755 Cote-Ste-Catherine Street, Montreal, Quebec H3T 1E2, Canada
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Zavaglia D, Lin EH, Guidetti M, Pluquet O, Hainaut P, Favrot MC, Coll JL. Poor intercellular transport and absence of enhanced antiproliferative activity after non-viral gene transfer of VP22-P53 or P53-VP22 fusions into p53 null cell lines in vitro or in vivo. J Gene Med 2005; 7:936-44. [PMID: 15754307 DOI: 10.1002/jgm.741] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND The herpes simplex virus type 1 (HSV-1) VP22 protein has the property to mediate intercellular trafficking of heterologous proteins fused to its C- or N-terminus. We have previously shown improved delivery and enhanced therapeutic effect in vitro and in vivo with a P27-VP22 fusion protein. In this report, we were interested in studying the spread and biological activity of VP22 fused to the P53 tumor suppressor. METHODS Expression of the VP22-P53 and P53-VP22 fusion proteins was shown by Western blot and intercellular spreading was monitored by immunofluorescence on transiently transfected cells. In vitro antiproliferative activity of wild-type (wt) P53 and P53-VP22 was assessed by proliferation assays and transactivating ability was studied by a reporter gene test and a gel-shift assay. Antitumor activity was also tested in vivo by intratumoral injections of naked DNA in a model of subcutaneous tumors implanted in nude mice. RESULTS Our results show that the C-terminal fusion or the N-terminal P53-VP22 fusion proteins are not able to spread as efficiently as VP22. Moreover, we demonstrate that VP22-P53 does not possess any transactivating ability. P53-VP22 has an antiproliferative activity, but this activity is not superior to the one of P53 alone, in vitro or in vivo. CONCLUSIONS Our study indicates that a gene transfer strategy using VP22 cannot be considered as a universal system to improve the delivery of any protein.
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Affiliation(s)
- David Zavaglia
- Groupe de Recherche sur le Cancer du Poumon, INSERM U578, Institut Albert Bonniot, 38706 La Tronche, France
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Qu L, Huang S, Baltzis D, Rivas-Estilla AM, Pluquet O, Hatzoglou M, Koumenis C, Taya Y, Yoshimura A, Koromilas AE. Endoplasmic reticulum stress induces p53 cytoplasmic localization and prevents p53-dependent apoptosis by a pathway involving glycogen synthase kinase-3beta. Genes Dev 2004; 18:261-77. [PMID: 14744935 PMCID: PMC338280 DOI: 10.1101/gad.1165804] [Citation(s) in RCA: 206] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The tumor suppressor p53, a sensor of multiple forms of cellular stress, is regulated by post-translational mechanisms to induce cell-cycle arrest, senescence, or apoptosis. We demonstrate that endoplasmic reticulum (ER) stress inhibits p53-mediated apoptosis. The mechanism of inhibition involves the increased cytoplasmic localization of p53 due to phosphorylation at serine 315 and serine 376, which is mediated by glycogen synthase kinase-3 beta (GSK-3beta). ER stress induces GSK-3beta binding to p53 in the nucleus and enhances the cytoplasmic localization of the tumor suppressor. Inhibition of apoptosis caused by ER stress requires GSK-3beta and does not occur in cells expressing p53 with mutation(s) of serine 315 and/or serine 376 to alanine(s). As a result of the increased cytoplasmic localization, ER stress prevents p53 stabilization and p53-mediated apoptosis upon DNA damage. It is concluded that inactivation of p53 is a protective mechanism utilized by cells to adapt to ER stress.
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Affiliation(s)
- LiKe Qu
- Lady Davis Institute for Medical Research, McGill University, Sir Mortimer B Davis-Jewish General Hospital, Montréal, Québec H3T 1E2, Canada
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Pluquet O, North S, Bhoumik A, Dimas K, Ronai Z, Hainaut P. The cytoprotective aminothiol WR1065 activates p53 through a non-genotoxic signaling pathway involving c-Jun N-terminal kinase. J Biol Chem 2003; 278:11879-87. [PMID: 12531896 DOI: 10.1074/jbc.m207396200] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
WR1065 is an aminothiol with selective cytoprotective effects in normal cells compared with cancer cells. In a previous study (North, S., El-Ghissassi, F., Pluquet, O., Verhaegh, G., and Hainaut, P. (2000) Oncogene 19, 1206-1214), we have shown that WR1065 activates wild-type p53 in cultured cells. Here we show that WR1065 induces p53 to accumulate through escape from proteasome-dependent degradation. This accumulation is not prevented by inhibitors of phosphatidylinositol 3-kinases and is not accompanied by phosphorylation of Ser-15, -20, or -37, which are common targets of the kinases activated in response to DNA damage. Furthermore, WR1065 activates the JNK (c-Jun N-terminal kinase), decreases complex formation between p53 and inactive JNK, and phosphorylates p53 at Thr-81, a known site of phosphorylation by JNK. A dominant negative form of JNK (JNK-APF) reduces by 50% the activation of p53 by WR1065. Thus, WR1065 activates p53 through a JNK-dependent signaling pathway. This pathway may prove useful for pharmacological modulation of p53 activity through non-genotoxic mechanisms.
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Affiliation(s)
- Olivier Pluquet
- Unit of Molecular Carcinogenesis, International Agency for Research on Cancer, 69372 Lyon Cedex 08, France
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Pluquet O, North S, Richard MJ, Hainaut P. Activation of p53 by the cytoprotective aminothiol WR1065: DNA-damage-independent pathway and redox-dependent modulation of p53 DNA-binding activity. Biochem Pharmacol 2003; 65:1129-37. [PMID: 12663048 DOI: 10.1016/s0006-2952(02)01655-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
WR1065 is an aminothiol with selective cytoprotective effects in normal compared to cancer cells, which is used to protect tissues against the damaging effect of radiation and chemotherapeutic drugs. WR1065 has been shown to induce wild-type p53 accumulation and activation in cultured cells, suggesting a role of p53 in cytoprotection. However, the molecular mechanisms by which WR1065 activates p53 remain unclear. Here, we demonstrated that p53 accumulation by WR1065 in MCF-7 cells did not result from the formation of DNA-damage as measured by DNA fragmentation and Comet assay, nor from oxidative stress as detected by measurement of glutathione levels, lipid peroxidation and reactive oxygen species production. p53 activation by WR1065 was not prevented by inhibition of PI-3 kinases, and was still detectable in MCF-7 cells stably transfected with the oncoprotein E6, which repressed p53 induction by DNA damage. These data provided evidence that WR1065 induces p53 by a pathway different than the one elicited by DNA-damage. Direct reduction by WR1065 of key cysteines in p53 may play an important role in this alternative pathway, as shown by the fact that WR1065 activated the redox-dependent, DNA-binding activity of p53 in vitro.
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Affiliation(s)
- Olivier Pluquet
- Unit of Molecular Carcinogenesis, International Agency for Research on Cancer, 69372 Lyon Cedex 08, France
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North S, Pluquet O, Maurici D, El-Ghissassi F, Hainaut P. Restoration of wild-type conformation and activity of a temperature-sensitive mutant of p53 (p53(V272M)) by the cytoprotective aminothiol WR1065 in the esophageal cancer cell line TE-1. Mol Carcinog 2002; 33:181-8. [PMID: 11870884 DOI: 10.1002/mc.10038] [Citation(s) in RCA: 67] [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] [Indexed: 11/05/2022]
Abstract
The aminothiol WR1065, the active metabolite of the cytoprotector amifostine, exerts its antimutagenic effects through free-radical scavenging and other unknown mechanisms. In an earlier report, we showed that WR1065 activates wild-type p53 in MCF-7 cells, leading to p53-dependent arrest in the G(1) phase of the cell cycle. To determine whether WR1065 activates p53 by modulating protein conformation, we analyzed its effects on p53 conformation and activity in the esophageal cancer cell line TE-1. This cell line contains a mutation in codon 272 of p53 (p53(V272M), with methionine instead of a valine), conferring temperature-sensitive properties to the p53 protein. At the nonpermissive temperature (37 degrees C), p53(V272M) adopts the mutant p53 conformation (nonreactive with the antibody PAb1620), does not bind specifically to DNA, and is not activated in response to DNA-damaging treatment. However, treatment with 0.5-4 mM WR1065 partially restored wild-type conformation at 37 degrees C, stimulated DNA binding activity, and increased the expression of p53 target genes WAF-1, GADD45, and MDM2, leading to cell-cycle arrest in G(1). These results suggest that WR1065 activates p53 through a mechanism distinct from DNA-damage signaling, which involves modulation of p53 protein conformation.
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Affiliation(s)
- Sophie North
- Group of Molecular Carcinogenesis, International Agency for Research on Cancer, Lyon, France
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Abstract
Since the initial concept of p53 as a sensor of DNA-damage, the picture of the role of p53 has widened to include the sensing of much more diverse forms of stress, including hypoxia and constitutive activation of growth-promoting cascades. The pathways by which these processes regulate p53 are partially overlapping, but imply different patterns of post-translational modifications. In this review, we summarize current knowledge on post-translational modifications of p53, and we discuss how hypoxia and oncogene activation stresses may induce p53 independently of DNA damage.
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Affiliation(s)
- O Pluquet
- Group of Molecular Carcinogenesis, International Agency for Research on Cancer, 150 Cours Albert Thomas, 69372, Lyon, France
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Chazotte-Aubert L, Pluquet O, Hainaut P, Ohshima H. Nitric oxide prevents gamma-radiation-induced cell cycle arrest by impairing p53 function in MCF-7 cells. Biochem Biophys Res Commun 2001; 281:766-71. [PMID: 11237724 DOI: 10.1006/bbrc.2001.4423] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We previously reported that nitric oxide (NO) released from S-nitrosoglutathione induces conformational change of the p53 tumor-suppressor protein that impairs its DNA-binding activity in vitro. We now demonstrate that MCF-7 cells preincubated in the presence of 0.5-1 mM S-nitrosoglutathione for 4 h before gamma-irradiation failed to arrest in the G1 phase of the cell cycle, whereas those gamma-irradiated without S-nitrosoglutathione exhibited a normal cell cycle arrest. The S-nitrosoglutathione-treated cells did not express the p53 target gene p21(waf-1) after gamma-irradiation, although p21(waf-1) was strongly expressed in cells irradiated in the absence of S-nitrosoglutathione. These results strongly suggest that NO impairs the function of p53 possibly via conformational change and/or amino acid modifications. On the other hand, cells incubated for 16 h in the presence of 1 mM S-nitrosoglutathione underwent apoptosis with accumulation of the pro-apoptotic protein Bax. This Bax accumulation, however, was shown to occur via a p53-independent pathway.
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Affiliation(s)
- L Chazotte-Aubert
- Unit of Endogenous Cancer Risk Factors, Group of Molecular Carcinogenesis, International Agency for Research on Cancer, 150 Cours Albert Thomas, Lyon cedex 08, 69372, France
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North S, El-Ghissassi F, Pluquet O, Verhaegh G, Hainaut P. The cytoprotective aminothiol WR1065 activates p21waf-1 and down regulates cell cycle progression through a p53-dependent pathway. Oncogene 2000; 19:1206-14. [PMID: 10713709 DOI: 10.1038/sj.onc.1203413] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The phosphoaminothiol WR1065, the active metabolite of the pro-drug amifostine (WR2721), protects cultured cells and tissues against cytotoxic exposure to radiation or chemotherapeutic agents. We show here that WR1065 and the pro-drug WR2721 activate the p53 tumor suppressor protein and induce the expression of the cyclin-dependent kinase inhibitor p21waf-1 in the breast cancer cell line MCF-7, and in the mouse fibroblast cell line balb/c 3T3. Using two MCF-7 derived cell lines, MN1 and MDD2, we show that induction of p21waf-1 is detectable in MN1 (expressing a functional p53) but not in MDD2 (p53 disabled). These effects are observed at concentrations of WR1065 (0.5 to 1 mM) identical to those required to protect against cytotoxicity by hydrogen peroxide. Induction of p53 is not prevented by addition of aminoguanidine, an inhibitor of Cu-dependent amine-oxidases which blocks the extra-cellular degradation of WR1065 into toxic metabolites. Moreover, spermidine, a natural polyamine structurally related to amifostine, does not activate p53. Induction of p53 by WR1065 results in a delay in the G1/S transition in MCF-7 and MN-1 cells, but not in the p53 disabled cells MDD2. These data indicate that WR1065, a polyamine analog with thiol anti-oxidant properties, activates a cell cycle check-point involving p53.
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Affiliation(s)
- S North
- Unit of Mechanisms of Carcinogenesis, International Agency for Research on Cancer, 150 Cours Albert Thomas, 69372 Lyon, France
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