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Husain S, Prestes NF, Fayet O, Collin S, Godel F, Jacquet E, Denneulin T, Dunin-Borkowski RE, Thiaville A, Bibes M, Jaffrès H, Reyren N, Fert A, George JM. Field-Free Switching of Perpendicular Magnetization in an Ultrathin Epitaxial Magnetic Insulator. Nano Lett 2024; 24:2743-2750. [PMID: 38393986 DOI: 10.1021/acs.nanolett.3c04413] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/25/2024]
Abstract
For energy-efficient magnetic memories, switching of perpendicular magnetization by spin-orbit torque (SOT) appears to be a promising solution. This SOT switching requires the assistance of an in-plane magnetic field to break the symmetry. Here, we demonstrate the field-free SOT switching of a perpendicularly magnetized thulium iron garnet (Tm3Fe5O12, TmIG). The polarity of the switching loops, clockwise or counterclockwise, is determined by the direction of the initial current pulses, in contrast with field-assisted switching where the polarity is controlled by the direction of the magnetic field. From Brillouin light scattering, we determined the Dzyaloshinskii-Moriya interaction (DMI) induced by the Pt-TmIG interface. We will discuss the possible origins of field-free switching and the roles of the interfacial DMI and cubic magnetic anisotropy of TmIG. This discussion is substantiated by magnetotransport, Kerr microscopy, and micromagnetic simulations. Our observation of field-free electrical switching of a magnetic insulator is an important milestone for low-power spintronic devices.
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Affiliation(s)
- Sajid Husain
- Laboratoire Albert Fert CNRS, Thales, Université Paris-Saclay, 1 avenue Augustin Fresnel, 91767 Palaiseau Cedex, France
| | - Nicholas F Prestes
- Laboratoire Albert Fert CNRS, Thales, Université Paris-Saclay, 1 avenue Augustin Fresnel, 91767 Palaiseau Cedex, France
| | - Olivier Fayet
- Laboratoire Albert Fert CNRS, Thales, Université Paris-Saclay, 1 avenue Augustin Fresnel, 91767 Palaiseau Cedex, France
| | - Sophie Collin
- Laboratoire Albert Fert CNRS, Thales, Université Paris-Saclay, 1 avenue Augustin Fresnel, 91767 Palaiseau Cedex, France
| | - Florian Godel
- Laboratoire Albert Fert CNRS, Thales, Université Paris-Saclay, 1 avenue Augustin Fresnel, 91767 Palaiseau Cedex, France
| | - Eric Jacquet
- Laboratoire Albert Fert CNRS, Thales, Université Paris-Saclay, 1 avenue Augustin Fresnel, 91767 Palaiseau Cedex, France
| | - Thibaud Denneulin
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Rafal E Dunin-Borkowski
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - André Thiaville
- Laboratoire de Physique des Solides, Université Paris-Saclay, CNRS, 91405 Orsay, France
| | - Manuel Bibes
- Laboratoire Albert Fert CNRS, Thales, Université Paris-Saclay, 1 avenue Augustin Fresnel, 91767 Palaiseau Cedex, France
| | - Henri Jaffrès
- Laboratoire Albert Fert CNRS, Thales, Université Paris-Saclay, 1 avenue Augustin Fresnel, 91767 Palaiseau Cedex, France
| | - Nicolas Reyren
- Laboratoire Albert Fert CNRS, Thales, Université Paris-Saclay, 1 avenue Augustin Fresnel, 91767 Palaiseau Cedex, France
| | - Albert Fert
- Laboratoire Albert Fert CNRS, Thales, Université Paris-Saclay, 1 avenue Augustin Fresnel, 91767 Palaiseau Cedex, France
| | - Jean-Marie George
- Laboratoire Albert Fert CNRS, Thales, Université Paris-Saclay, 1 avenue Augustin Fresnel, 91767 Palaiseau Cedex, France
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Le Boulch M, Jacquet E, Nhiri N, Shmulevitz M, Jaïs PH. Rational design of an artificial tethered enzyme for non-templated post-transcriptional mRNA polyadenylation by the second generation of the C3P3 system. Sci Rep 2024; 14:5156. [PMID: 38431749 PMCID: PMC10908868 DOI: 10.1038/s41598-024-55947-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Accepted: 02/29/2024] [Indexed: 03/05/2024] Open
Abstract
We have previously introduced the first generation of C3P3, an artificial system that allows the autonomous in-vivo production of mRNA with m7GpppN-cap. While C3P3-G1 synthesized much larger amounts of capped mRNA in human cells than conventional nuclear expression systems, it produced a proportionately much smaller amount of the corresponding proteins, indicating a clear defect of mRNA translatability. A possible mechanism for this poor translatability could be the rudimentary polyadenylation of the mRNA produced by the C3P3-G1 system. We therefore sought to develop the C3P3-G2 system using an artificial enzyme to post-transcriptionally lengthen the poly(A) tail. This system is based on the mutant mouse poly(A) polymerase alpha fused at its N terminus with an N peptide from the λ virus, which binds to BoxBr sequences placed in the 3'UTR region of the mRNA of interest. The resulting system selectively brings mPAPαm7 to the target mRNA to elongate its poly(A)-tail to a length of few hundred adenosine. Such elongation of the poly(A) tail leads to an increase in protein expression levels of about 2.5-3 times in cultured human cells compared to the C3P3-G1 system. Finally, the coding sequence of the tethered mutant poly(A) polymerase can be efficiently fused to that of the C3P3-G1 enzyme via an F2A sequence, thus constituting the single-ORF C3P3-G2 enzyme. These technical developments constitute an important milestone in improving the performance of the C3P3 system, paving the way for its applications in bioproduction and non-viral human gene therapy.
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Affiliation(s)
- Marine Le Boulch
- Eukarÿs SAS, Pépinière Genopole, 4 rue Pierre Fontaine, Genopole Entreprises Campus 3, 4 Rue Pierre Fontaine, 91000, Evry-Courcouronnes, France
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, CNRS UPR2301, Université Paris-Saclay, Avenue de la Terrasse, 91198, Gif-Sur-Yvette, France
| | - Naïma Nhiri
- Institut de Chimie des Substances Naturelles, CNRS UPR2301, Université Paris-Saclay, Avenue de la Terrasse, 91198, Gif-Sur-Yvette, France
| | - Maya Shmulevitz
- Medical Microbiology and Immunology, Li Ka Shing Institute of Virology, University of Alberta, 6-142J Katz Group Centre for Pharmacy and Health Research, 114 Street NW, Edmonton, AB, T6G 2E1, Canada
| | - Philippe H Jaïs
- Eukarÿs SAS, Pépinière Genopole, 4 rue Pierre Fontaine, Genopole Entreprises Campus 3, 4 Rue Pierre Fontaine, 91000, Evry-Courcouronnes, France.
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3
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Lim WC, Marques Da Costa ME, Godefroy K, Jacquet E, Gragert L, Rondof W, Marchais A, Nhiri N, Dalfovo D, Viard M, Labaied N, Khan AM, Dessen P, Romanel A, Pasqualini C, Schleiermacher G, Carrington M, Zitvogel L, Scoazec JY, Geoerger B, Salmon J. Divergent HLA variations and heterogeneous expression but recurrent HLA loss-of- heterozygosity and common HLA-B and TAP transcriptional silencing across advanced pediatric solid cancers. Front Immunol 2024; 14:1265469. [PMID: 38318504 PMCID: PMC10839790 DOI: 10.3389/fimmu.2023.1265469] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 11/06/2023] [Indexed: 02/07/2024] Open
Abstract
The human leukocyte antigen (HLA) system is a major factor controlling cancer immunosurveillance and response to immunotherapy, yet its status in pediatric cancers remains fragmentary. We determined high-confidence HLA genotypes in 576 children, adolescents and young adults with recurrent/refractory solid tumors from the MOSCATO-01 and MAPPYACTS trials, using normal and tumor whole exome and RNA sequencing data and benchmarked algorithms. There was no evidence for narrowed HLA allelic diversity but discordant homozygosity and allele frequencies across tumor types and subtypes, such as in embryonal and alveolar rhabdomyosarcoma, neuroblastoma MYCN and 11q subtypes, and high-grade glioma, and several alleles may represent protective or susceptibility factors to specific pediatric solid cancers. There was a paucity of somatic mutations in HLA and antigen processing and presentation (APP) genes in most tumors, except in cases with mismatch repair deficiency or genetic instability. The prevalence of loss-of-heterozygosity (LOH) ranged from 5.9 to 7.7% in HLA class I and 8.0 to 16.7% in HLA class II genes, but was widely increased in osteosarcoma and glioblastoma (~15-25%), and for DRB1-DQA1-DQB1 in Ewing sarcoma (~23-28%) and low-grade glioma (~33-50%). HLA class I and HLA-DR antigen expression was assessed in 194 tumors and 44 patient-derived xenografts (PDXs) by immunochemistry, and class I and APP transcript levels quantified in PDXs by RT-qPCR. We confirmed that HLA class I antigen expression is heterogeneous in advanced pediatric solid tumors, with class I loss commonly associated with the transcriptional downregulation of HLA-B and transporter associated with antigen processing (TAP) genes, whereas class II antigen expression is scarce on tumor cells and occurs on immune infiltrating cells. Patients with tumors expressing sufficient HLA class I and TAP levels such as some glioma, osteosarcoma, Ewing sarcoma and non-rhabdomyosarcoma soft-tissue sarcoma cases may more likely benefit from T cell-based approaches, whereas strategies to upregulate HLA expression, to expand the immunopeptidome, and to target TAP-independent epitopes or possibly LOH might provide novel therapeutic opportunities in others. The consequences of HLA class II expression by immune cells remain to be established. Immunogenetic profiling should be implemented in routine to inform immunotherapy trials for precision medicine of pediatric cancers.
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Affiliation(s)
- Wan Ching Lim
- INSERM U1015, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
- Bioinformatics Platform, AMMICA, INSERM US23/CNRS UMS3655, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
- School of Data Sciences, Perdana University, Kuala Lumpur, Malaysia
| | | | - Karine Godefroy
- Department of Pathology and Laboratory Medicine, Translational Research Laboratory and Biobank, AMMICA, INSERM US23/CNRS UMS3655, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, CNRS UPR2301, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Loren Gragert
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA, United States
| | - Windy Rondof
- INSERM U1015, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
- Bioinformatics Platform, AMMICA, INSERM US23/CNRS UMS3655, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
| | - Antonin Marchais
- INSERM U1015, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
- Bioinformatics Platform, AMMICA, INSERM US23/CNRS UMS3655, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
| | - Naima Nhiri
- Institut de Chimie des Substances Naturelles, CNRS UPR2301, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Davide Dalfovo
- Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, Trento, Italy
| | - Mathias Viard
- Frederick National Laboratory for Cancer Research, National Cancer Institute, Frederick, MD, United States
- Laboratory of Integrative Cancer Immunology, Center for Cancer Research, National Cancer Institute, Bethesda, MD, United States
| | - Nizar Labaied
- Department of Pathology and Laboratory Medicine, Translational Research Laboratory and Biobank, AMMICA, INSERM US23/CNRS UMS3655, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
| | - Asif M. Khan
- School of Data Sciences, Perdana University, Kuala Lumpur, Malaysia
| | - Philippe Dessen
- Bioinformatics Platform, AMMICA, INSERM US23/CNRS UMS3655, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
| | - Alessandro Romanel
- Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, Trento, Italy
| | - Claudia Pasqualini
- INSERM U1015, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
- Department of Pediatric and Adolescent Oncology, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
| | - Gudrun Schleiermacher
- INSERM U830, Recherche Translationnelle en Oncologie Pédiatrique (RTOP), and SIREDO Oncology Center (Care, Innovation and Research for Children and AYA with Cancer), PSL Research University, Institut Curie, Paris, France
| | - Mary Carrington
- Frederick National Laboratory for Cancer Research, National Cancer Institute, Frederick, MD, United States
- Laboratory of Integrative Cancer Immunology, Center for Cancer Research, National Cancer Institute, Bethesda, MD, United States
- Ragon Institute of Massachusetts General Hospital, MIT and Harvard University, Cambridge, MA, United States
| | - Laurence Zitvogel
- INSERM U1015, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
| | - Jean-Yves Scoazec
- Department of Pathology and Laboratory Medicine, Translational Research Laboratory and Biobank, AMMICA, INSERM US23/CNRS UMS3655, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
| | - Birgit Geoerger
- INSERM U1015, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
- Department of Pediatric and Adolescent Oncology, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
| | - Jerome Salmon
- INSERM U1015, Gustave Roussy Cancer Campus, Université Paris-Saclay, Villejuif, France
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Alvaro-Aranda L, Petitalot A, Djeghmoum Y, Panigada D, Singh JK, Ehlén Å, Vugic D, Martin C, Miron S, Contreras-Perez A, Nhiri N, Boucherit V, Lafitte P, Dumoulin I, Rouleau E, Jacquet E, Feliubadaló L, Del Valle J, Stoppa-Lyonnet D, Zinn-Justin S, Lázaro C, Caputo SM, Carreira A. The BRCA2 R2645G variant increases DNA binding and induces hyper-recombination. Nucleic Acids Res 2023:gkad1222. [PMID: 38142462 DOI: 10.1093/nar/gkad1222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 11/30/2023] [Accepted: 12/12/2023] [Indexed: 12/26/2023] Open
Abstract
BRCA2 tumor suppressor protein ensures genome integrity by mediating DNA repair via homologous recombination (HR). This function is executed in part by its canonical DNA binding domain located at the C-terminus (BRCA2CTD), the only folded domain of the protein. Most germline pathogenic missense variants are located in this highly conserved region which binds to single-stranded DNA (ssDNA) and to the acidic protein DSS1. These interactions are essential for the HR function of BRCA2. Here, we report that the variant R2645G, identified in breast cancer and located at the DSS1 interface, unexpectedly increases the ssDNA binding activity of BRCA2CTDin vitro. Human cells expressing this variant display a hyper-recombination phenotype, chromosomal instability in the form of chromatid gaps when exposed to DNA damage, and increased PARP inhibitor sensitivity. In mouse embryonic stem cells (mES), this variant alters viability and confers sensitivity to cisplatin and Mitomycin C. These results suggest that BRCA2 interaction with ssDNA needs to be tightly regulated to limit HR and prevent chromosomal instability and we propose that this control mechanism involves DSS1. Given that several missense variants located within this region have been identified in breast cancer patients, these findings might have clinical implications for carriers.
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Affiliation(s)
- Lucia Alvaro-Aranda
- Genome Instability and Cancer Predisposition Laboratory, Centro de Biologia Molecular Severo Ochoa (CBMSO), CSIC-UAM, Madrid 28049, Spain
| | - Ambre Petitalot
- Department of Genetics, Institut Curie, Paris 75005, France
- PSL Research University, Paris 75005, France
| | - Yasmina Djeghmoum
- Institut Curie, PSL Research University, CNRS, UMR3348, F-91405 Orsay, France
- Paris-Saclay University CNRS, UMR3348, F-91405 Orsay, France
| | - Davide Panigada
- Institut Curie, PSL Research University, CNRS, UMR3348, F-91405 Orsay, France
- Paris-Saclay University CNRS, UMR3348, F-91405 Orsay, France
| | - Jenny Kaur Singh
- Institut Curie, PSL Research University, CNRS, UMR3348, F-91405 Orsay, France
- Paris-Saclay University CNRS, UMR3348, F-91405 Orsay, France
| | - Åsa Ehlén
- Institut Curie, PSL Research University, CNRS, UMR3348, F-91405 Orsay, France
- Paris-Saclay University CNRS, UMR3348, F-91405 Orsay, France
| | - Domagoj Vugic
- Institut Curie, PSL Research University, CNRS, UMR3348, F-91405 Orsay, France
- Paris-Saclay University CNRS, UMR3348, F-91405 Orsay, France
| | - Charlotte Martin
- Institut Curie, PSL Research University, CNRS, UMR3348, F-91405 Orsay, France
- Paris-Saclay University CNRS, UMR3348, F-91405 Orsay, France
| | - Simona Miron
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Paris-Saclay University, 91190 Gif-sur-Yvette, France
| | - Aida Contreras-Perez
- Genome Instability and Cancer Predisposition Laboratory, Centro de Biologia Molecular Severo Ochoa (CBMSO), CSIC-UAM, Madrid 28049, Spain
| | - Naima Nhiri
- Institut de Chimie des Substances Naturelles, Paris-Saclay University, CNRS, 91190 Gif-sur-Yvette, France
| | - Virginie Boucherit
- Institut Curie, PSL Research University, CNRS, UMR3348, F-91405 Orsay, France
- Paris-Saclay University CNRS, UMR3348, F-91405 Orsay, France
| | - Philippe Lafitte
- Department of Genetics, Institut Curie, Paris 75005, France
- PSL Research University, Paris 75005, France
| | - Isaac Dumoulin
- Institut Curie, PSL Research University, CNRS, UMR3348, F-91405 Orsay, France
- Paris-Saclay University CNRS, UMR3348, F-91405 Orsay, France
| | - Etienne Rouleau
- Department of Genetics, Institut Curie, Paris 75005, France
- PSL Research University, Paris 75005, France
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, Paris-Saclay University, CNRS, 91190 Gif-sur-Yvette, France
| | - Lidia Feliubadaló
- Hereditary Cancer Program, Catalan Institute of Oncology (ICO), Hereditary Cancer Group, Molecular Mechanisms and Experimental Therapy in Oncology Program, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), L'Hospitalet de Llobregat, Spain
- Ciber Oncología (CIBERONC), Instituto Salud Carlos III, Madrid, Spain
| | - Jesús Del Valle
- Hereditary Cancer Program, Catalan Institute of Oncology (ICO), Hereditary Cancer Group, Molecular Mechanisms and Experimental Therapy in Oncology Program, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), L'Hospitalet de Llobregat, Spain
- Ciber Oncología (CIBERONC), Instituto Salud Carlos III, Madrid, Spain
| | - Dominique Stoppa-Lyonnet
- Department of Genetics, Institut Curie, Paris 75005, France
- Paris-Cité University, Paris, France
- INSERM U830, Institut Curie, Paris 75005, France
| | - Sophie Zinn-Justin
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Paris-Saclay University, 91190 Gif-sur-Yvette, France
| | - Conxi Lázaro
- Hereditary Cancer Program, Catalan Institute of Oncology (ICO), Hereditary Cancer Group, Molecular Mechanisms and Experimental Therapy in Oncology Program, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), L'Hospitalet de Llobregat, Spain
- Ciber Oncología (CIBERONC), Instituto Salud Carlos III, Madrid, Spain
| | - Sandrine M Caputo
- Department of Genetics, Institut Curie, Paris 75005, France
- PSL Research University, Paris 75005, France
| | - Aura Carreira
- Genome Instability and Cancer Predisposition Laboratory, Centro de Biologia Molecular Severo Ochoa (CBMSO), CSIC-UAM, Madrid 28049, Spain
- Institut Curie, PSL Research University, CNRS, UMR3348, F-91405 Orsay, France
- Paris-Saclay University CNRS, UMR3348, F-91405 Orsay, France
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Elouneg A, Chambert J, Lejeune A, Lucot Q, Jacquet E, Bordas SPA. Anisotropic mechanical characterization of human skin by in vivo multi-axial ring suction test. J Mech Behav Biomed Mater 2023; 141:105779. [PMID: 36940583 DOI: 10.1016/j.jmbbm.2023.105779] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 02/10/2023] [Accepted: 03/12/2023] [Indexed: 03/17/2023]
Abstract
Human skin is a soft tissue behaving as an anisotropic material. The anisotropy emerges from the alignment of collagen fibers in the dermis, which causes the skin to exhibit greater stiffness in a certain direction, known as Langer's line. The importance of determining this anisotropy axis lies in assisting surgeons in making incisions that do not produce undesirable scars. In this paper, we introduce an open-source numerical framework, MARSAC (Multi-Axial Ring Suction for Anisotropy Characterization: https://github.com/aflahelouneg/MARSAC), adapted to a commercial device CutiScan CS 100® that applies a suction load on an annular section, causing a multi-axial stretch in the central zone, where in-plane displacements are captured by a camera. The presented framework receives inputs from a video file and converts them into displacement fields through Digital Image Correlation (DIC) technique. From the latter and based on an analytical model, the method assesses the anisotropic material parameters of human skin: Langer's line ϕ, and the elastic moduli E1 and E2 along the principal axes, providing that the Poisson's ratio is fixed. The pipeline was applied to a public data repository, https://search-data.ubfc.fr/femto/FR-18008901306731-2021-08-25_In-vivo-skin-anisotropy-dataset-for-a-young-man.html, containing 30 test series performed on a forearm of a Caucasian subject. As a result, the identified parameter averages, ϕˆ=40.9±8.2∘ and the anisotropy ratio E1ˆ/E2ˆ=3.14±1.60, were in accordance with the literature. The intra-subject analysis showed a reliable assessment of ϕ and E2. As skin anisotropy varies from site to site and from subject to subject, the novelty of the method consists in (i) an optimal utilization of CutiScan CS 100® probe to measure the Langer's line accurately and rapidly on small areas with a minimum diameter of 14mm, (ii) validation of an analytical model based on deformation ellipticity.
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Affiliation(s)
- A Elouneg
- Université de Franche-Comté, CNRS, institut FEMTO-ST, F-25000 Besançon, France; Institute of Computational Engineering and Sciences, Department of Engineering, Université du Luxembourg, Esch-sur-Alzette, Luxembourg
| | - J Chambert
- Université de Franche-Comté, CNRS, institut FEMTO-ST, F-25000 Besançon, France
| | - A Lejeune
- Université de Franche-Comté, CNRS, institut FEMTO-ST, F-25000 Besançon, France
| | - Q Lucot
- Université de Franche-Comté, CNRS, institut FEMTO-ST, F-25000 Besançon, France
| | - E Jacquet
- Université de Franche-Comté, CNRS, institut FEMTO-ST, F-25000 Besançon, France
| | - S P A Bordas
- Université de Franche-Comté, CNRS, institut FEMTO-ST, F-25000 Besançon, France; Institute of Computational Engineering and Sciences, Department of Engineering, Université du Luxembourg, Esch-sur-Alzette, Luxembourg.
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6
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Arrivé C, Fonrose X, Thomas F, Roth G, Jacquet E, Brice A, Chirica C, Farneti D, Frenoux C, Stanke-Labesque F, Gautier-Veyret E. Discrepancies between Dihydropyrimidine dehydrogenase phenotyping and genotyping: what are the explanatory factors? Br J Clin Pharmacol 2023. [PMID: 36918744 DOI: 10.1111/bcp.15715] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/23/2023] [Accepted: 03/03/2023] [Indexed: 03/16/2023] Open
Abstract
AIM Dihydropyrimidine dehydrogenase (DPD) deficiency can be detected by phenotyping (measurement of plasma uracil (U), with U≥16μg/L defining a partial deficiency) and/or by genotyping (screening for the four most frequent DPYD variants). We aimed to determine the proportion of discrepancies between phenotypic and genotypic approaches and to identify possible explanatory factors. METHODS Data from patients who underwent both phenotyping and genotyping were retrospectively collected. Complementary genetic analyses (genotyping of the variant c.557A>G and DPYD sequencing) were performed for patients with U≥16μg/L without any common variants. The characteristics of patients classified according to the congruence of the phenotyping and genotyping approaches were compared (Kruskal-Wallis test) and determinants of U levels were studied in the whole cohort (linear model). RESULTS Among the 712 included patients, phenotyping and genotyping were discordant for 12.5%, with 63 (8.8%) having U≥16μg/L in the absence of a common variant. Complementary genetic investigations marginally reduced the percentage of discrepancies to 12.1%: among the nine additional identified variants, only the c.557A>G variant, carried by three patients, had been previously reported to be associated with DPD deficiency. Liver dysfunction could explain certain discordances, as ASAT, ALP, GGT, and bilirubin levels were significantly elevated, with more frequent liver metastases in patients with U≥16μg/L and the absence of a DPYD variant. The impact of cytolysis was confirmed, as ASAT levels were independently associated with increased U (p<0.001). CONCLUSION The frequent discordances between DPD phenotyping and genotyping approaches highlight the need to perform these two approaches to screen for all DPD deficiencies.
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Affiliation(s)
- C Arrivé
- Laboratoire de Pharmacologie, Pharmacogénétique et Toxicologie, CHU, Grenoble
| | - X Fonrose
- Laboratoire de Pharmacologie, Pharmacogénétique et Toxicologie, CHU, Grenoble
| | - F Thomas
- Department of Pharmacology, Institut Claudius-Regaud, CRCT, Université de Toulouse, Inserm, UPS, Toulouse, France
| | - G Roth
- Univ. Grenoble Alpes, Hepato-Gastroenterology and Digestive Oncology department, CHU Grenoble Alpes, Institute for Advanced Biosciences, CNRS UMR 5309-INSERM U1209, Grenoble
| | - E Jacquet
- Univ. Grenoble Alpes, Cancer and Blood Diseases department, CHU Grenoble Alpes, Institute for Advanced Biosciences, INSERM U1209, Grenoble
| | - A Brice
- Department of Pharmacology, Institut Claudius-Regaud, CRCT, Université de Toulouse, Inserm, UPS, Toulouse, France
| | - C Chirica
- Service de Biochimie, Biologie Moléculaire et Toxicologie Environnementale, CHU Grenoble-Alpes, Grenoble, France
| | - D Farneti
- Univ. Grenoble Alpes/Cancer and Blood Diseases Department, CHU, Grenoble
| | - Coralie Frenoux
- Univ. Grenoble Alpes/Cancer and Blood Diseases Department, CHU, Grenoble
| | - F Stanke-Labesque
- Laboratoire de Pharmacologie, Pharmacogénétique et Toxicologie, CHU, Grenoble.,Univ. Grenoble Alpes, INSERM, CHU Grenoble Alpes, HP2, 38000, Grenoble, France
| | - E Gautier-Veyret
- Laboratoire de Pharmacologie, Pharmacogénétique et Toxicologie, CHU, Grenoble.,Univ. Grenoble Alpes, INSERM, CHU Grenoble Alpes, HP2, 38000, Grenoble, France
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7
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Grammatika Pavlidou N, Dobrev S, Beneke K, Reinhardt F, Pecha S, Jacquet E, Abu-Taha IH, Schmidt C, Voigt N, Kamler M, Schnabel RB, Baczkó I, Garnier A, Reichenspurner H, Nikolaev VO, Dobrev D, Molina CE. Phosphodiesterase 8 governs cAMP/PKA-dependent reduction of L-type calcium current in human atrial fibrillation: a novel arrhythmogenic mechanism. Eur Heart J 2023:7049990. [PMID: 36810794 DOI: 10.1093/eurheartj/ehad086] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 12/22/2022] [Accepted: 02/03/2023] [Indexed: 02/24/2023] Open
Abstract
AIMS Atrial fibrillation (AF) is associated with altered cAMP/PKA signaling and an AF-promoting reduction of L-type Ca2+-current (ICa,L), the mechanisms of which are poorly understood. Cyclic-nucleotide phosphodiesterases (PDEs) degrade cAMP and regulate PKA-dependent phosphorylation of key calcium-handling proteins, including the ICa,L-carrying Cav1.2α1C subunit. The aim was to assess whether altered function of PDE type-8 (PDE8) isoforms contributes to the reduction of ICa,L in persistent (chronic) AF (cAF) patients. METHODS AND RESULTS mRNA, protein levels, and localization of PDE8A and PDE8B isoforms were measured by RT-qPCR, western blot, co-immunoprecipitation and immunofluorescence. PDE8 function was assessed by FRET, patch-clamp and sharp-electrode recordings. PDE8A gene and protein levels were higher in paroxysmal AF (pAF) vs. sinus rhythm (SR) patients, whereas PDE8B was upregulated in cAF only. Cytosolic abundance of PDE8A was higher in atrial pAF myocytes, whereas PDE8B tended to be more abundant at the plasmalemma in cAF myocytes. In co-immunoprecipitation, only PDE8B2 showed binding to Cav1.2α1C subunit which was strongly increased in cAF. Accordingly, Cav1.2α1C showed a lower phosphorylation at Ser1928 in association with decreased ICa,L in cAF. Selective PDE8 inhibition increased Ser1928 phosphorylation of Cav1.2α1C, enhanced cAMP at the subsarcolemma and rescued the lower ICa,L in cAF, which was accompanied by a prolongation of action potential duration at 50% of repolarization. CONCLUSION Both PDE8A and PDE8B are expressed in human heart. Upregulation of PDE8B isoforms in cAF reduces ICa,L via direct interaction of PDE8B2 with the Cav1.2α1C subunit. Thus, upregulated PDE8B2 might serve as a novel molecular mechanism of the proarrhythmic reduction of ICa,L in cAF.
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Affiliation(s)
- Nefeli Grammatika Pavlidou
- Institute of Experimental Cardiovascular Research and University Center of Cardiovascular Sciences, University Medical Center Hamburg Eppendorf (UKE), Martinistrasse 52, W23, 20246 Hamburg, Germany.,German Centre for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Potsdamer Strasse 58, 10785 Berlin, Germany
| | - Shokoufeh Dobrev
- Institute of Pharmacology, West German Heart and Vascular Center, University Duisburg-Essen, Hufelandstrasse 55, 45147 Essen, Germany
| | - Kira Beneke
- Institute of Experimental Cardiovascular Research and University Center of Cardiovascular Sciences, University Medical Center Hamburg Eppendorf (UKE), Martinistrasse 52, W23, 20246 Hamburg, Germany.,German Centre for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Potsdamer Strasse 58, 10785 Berlin, Germany
| | - Franziska Reinhardt
- Institute of Experimental Cardiovascular Research and University Center of Cardiovascular Sciences, University Medical Center Hamburg Eppendorf (UKE), Martinistrasse 52, W23, 20246 Hamburg, Germany.,German Centre for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Potsdamer Strasse 58, 10785 Berlin, Germany.,Department of Cardiovascular Surgery, University Heart Center Hamburg, Martinistrasse 52, O70, 20246 Hamburg, Germany
| | - Simon Pecha
- German Centre for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Potsdamer Strasse 58, 10785 Berlin, Germany.,Department of Cardiovascular Surgery, University Heart Center Hamburg, Martinistrasse 52, O70, 20246 Hamburg, Germany
| | - Eric Jacquet
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 1 avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Issam H Abu-Taha
- Institute of Pharmacology, West German Heart and Vascular Center, University Duisburg-Essen, Hufelandstrasse 55, 45147 Essen, Germany
| | - Constanze Schmidt
- Department of Cardiology, University Medical Center Heidelberg, Im Neuenheimer Feld 672, 69120 Heidelberg, Germany
| | - Niels Voigt
- Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Robert-Koch-Strasse 40, 37075 Göttingen, Germany.,German Centre for Cardiovascular Research (DZHK), partner Site Göttingen, Potsdamer Strasse 58, 10785 Berlin, Germany.,Cluster of Excellence 'Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells' (MBExC), University of Göttingen, Robert-Koch- Strasse 40, 37075 Göttingen, Germany
| | - Markus Kamler
- Department of Thoracic and Cardiovascular Surgery, West German Heart and Vascular Center, University Duisburg-Essen, Hufelandstrasse 55, 45147 Essen, Germany
| | - Renate B Schnabel
- German Centre for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Potsdamer Strasse 58, 10785 Berlin, Germany.,Cardiology Department, University Heart and Vascular Centre Hamburg-Eppendorf, Martinistrasse 52, O70, 20246 Hamburg, Germany
| | - Istvan Baczkó
- Department Pharmacology and Pharmacotherapy, University of Szeged, H-6721, Szeged, Dóm tér 12, Szeged, Hungary
| | - Anne Garnier
- Inserm, UMR-S 1180, Université Paris-Saclay, Faculté de pharmacie, 17 avenue des Sciences, 91400 Orsay, France
| | - Hermann Reichenspurner
- German Centre for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Potsdamer Strasse 58, 10785 Berlin, Germany.,Department of Cardiovascular Surgery, University Heart Center Hamburg, Martinistrasse 52, O70, 20246 Hamburg, Germany
| | - Viacheslav O Nikolaev
- Institute of Experimental Cardiovascular Research and University Center of Cardiovascular Sciences, University Medical Center Hamburg Eppendorf (UKE), Martinistrasse 52, W23, 20246 Hamburg, Germany.,German Centre for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Potsdamer Strasse 58, 10785 Berlin, Germany
| | - Dobromir Dobrev
- Institute of Pharmacology, West German Heart and Vascular Center, University Duisburg-Essen, Hufelandstrasse 55, 45147 Essen, Germany.,Department of Medicine and Research Center, Montreal Heart Institute and Université de Montréal, 4100 Molson Street, Suite 340, H1Y 3N1 Montréal, Canada.,Department of Molecular Physiology & Biophysics, Baylor College of Medicine, One Baylor Plaza, 77030 Houston, USA
| | - Cristina E Molina
- Institute of Experimental Cardiovascular Research and University Center of Cardiovascular Sciences, University Medical Center Hamburg Eppendorf (UKE), Martinistrasse 52, W23, 20246 Hamburg, Germany.,German Centre for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Potsdamer Strasse 58, 10785 Berlin, Germany.,Institute of Pharmacology, West German Heart and Vascular Center, University Duisburg-Essen, Hufelandstrasse 55, 45147 Essen, Germany
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8
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Dreno L, Tiraboschi C, Lacoste S, Gomez SC, Garrido MF, Bertrand M, Tannoury M, Jacquet E, Nhiri N, Loriot Y, Fizazi K, Compagno D, Assrir N, Lescop E, Chauchereau A. Abstract 400: Functional, structural and binding studies of the atypical ER-resident protein FKBP7, a potential target in chemoresistant prostate cancer. Cancer Res 2022. [DOI: 10.1158/1538-7445.am2022-400] [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: Metastatic Castration Resistant Prostate Cancer (mCRPC) is the latest stage of Prostate Cancer (PCa). Despite the use of taxane-based chemotherapies Docetaxel and Cabazitaxel, mCRPC remains lethal due to chemoresistance. We recently identified FKBP7 as a potential therapeutic target of interest in PCa. FKBP7 is overexpressed in taxane-resistant PCa cells and impacts both cell proliferation and Docetaxel efficacy in chemoresistant models. We demonstrated FKBP7 affects translation and binds to the translation initiation complex eIF4F. FKBP7 is an ER-resident FKBP, but its properties remain poorly described.
Methods: FKBP7 expression upon chemotherapy treatment was assessed by Western Blot and correlation between FKBP7 expression and clinical prognosis was examined on public cancer databases. Subcellular localization of FKBP7 was addressed by digitonin-based fractionation. Finally, FKBP7-predicted structure was obtained with structural modeling servers and sequence alignments were performed on AliView. We then produced and purified the recombinant catalytic domain of FKBP7 and collected high quality 15N HSQC NMR spectra. Afterwards, we examined its interaction with well-known FKBP ligands.
Results: Increased FKBP7 expression was observed upon treatment with several cytotoxic chemotherapies in PCa-cell lines, and TCGA data underlined FKBP7 impacts survival in other cancers than PCa. Together, this suggests an enlarged potential involvement of FKBP7 in adaptive resistance. Mechanistically, in taxane-resistant models, FKBP7 overexpression did not result from higher protein stability but rather from a transcriptional regulation. Preliminary results of subcellular fractionation showed FKBP7 is present in the Endoplasmic Reticulum (ER) and seems to localize in the cytosol, independently of proteasomal degradation. We also confirmed FKBP7 is N45-glycosylated and observed that cytosolic-FKBP7 appears mainly glycosylated. This suggests that the ER-resident FKBP7 could be refluxed in the cytosol depending on its glycosylation state to regulate the activity of the cytosolic eIF4F complex. We are currently validating this hypothesis. At last, structural modeling predicted a FKBP-type fold with a potential FKBP7 substrate specificity as its catalytic pocket presents distinct composition for charge and bulkiness compared to other FKBPs. Accordingly, FKBP7 strongly binds Rapamycin and Everolimus, but surprisingly not FK506, confirming a selective binding profile.
Conclusion: Our work depicts the recently identified FKBP7/eIF4F pathway in PCa-resistance and points atypical properties for the ER-resident FKBP7. It also indicates FKBP7 could be a druggable target in adaptive resistance of other solid cancers. Besides, we gathered original data on its structure and specificity for future drug-targeting strategies.
Citation Format: Luce Dreno, Carolina Tiraboschi, Sofian Lacoste, Sofia Calpe Gomez, Marine F. Garrido, Matthieu Bertrand, Mariana Tannoury, Eric Jacquet, Naima Nhiri, Yohann Loriot, Karim Fizazi, Daniel Compagno, Nadine Assrir, Ewen Lescop, Anne Chauchereau. Functional, structural and binding studies of the atypical ER-resident protein FKBP7, a potential target in chemoresistant prostate cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 400.
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Affiliation(s)
| | - Carolina Tiraboschi
- 2Quimica biologica, IQUIBICEN-CONICET-UBA, Ciudad Autonoma de Buenos Aires, Argentina
| | | | | | | | | | | | - Eric Jacquet
- 3Institut de Chimie Des Substances Naturelles, Gif-sur-Yvette, France
| | - Naima Nhiri
- 3Institut de Chimie Des Substances Naturelles, Gif-sur-Yvette, France
| | | | | | - Daniel Compagno
- 2Quimica biologica, IQUIBICEN-CONICET-UBA, Ciudad Autonoma de Buenos Aires, Argentina
| | - Nadine Assrir
- 4Institut de Chimie des Substances Naturelles, Gif-sur-Yvette, France
| | - Ewen Lescop
- 4Institut de Chimie des Substances Naturelles, Gif-sur-Yvette, France
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9
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Liu D, Peyre F, Loissell-Baltazar YA, Courilleau D, Lacas-Gervais S, Nicolas V, Jacquet E, Dokudovskaya S, Taran F, Cintrat JC, Brenner C. Identification of Small Molecules Inhibiting Cardiomyocyte Necrosis and Apoptosis by Autophagy Induction and Metabolism Reprogramming. Cells 2022; 11:cells11030474. [PMID: 35159285 PMCID: PMC8834338 DOI: 10.3390/cells11030474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 11/16/2021] [Revised: 01/19/2022] [Accepted: 01/26/2022] [Indexed: 12/10/2022] Open
Abstract
Improvement of anticancer treatments is associated with increased survival of cancer patients at risk of cardiac disease. Therefore, there is an urgent need for new therapeutic molecules capable of preventing acute and long-term cardiotoxicity. Here, using commercial and home-made chemolibraries, we performed a robust phenotypic high-throughput screening in rat cardiomyoblast cell line H9c2, searching for small molecules capable of inhibiting cell death. A screen of 1600 compounds identified six molecules effective in preventing necrosis and apoptosis induced by H2O2 and camptothecin in H9c2 cells and in rat neonatal ventricular myocytes. In cells treated with these molecules, we systematically evaluated the expression of BCL-2 family members, autophagy progression, mitochondrial network structure, regulation of mitochondrial fusion/fission, reactive oxygen species, and ATP production. We found that these compounds affect autophagy induction to prevent cardiac cell death and can be promising cardioprotective drugs during chemotherapy.
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Affiliation(s)
- Dawei Liu
- Centre National de Recherche Scientifique (CNRS), Institut Gustave Roussy, Aspects Métaboliques et Systémiques de l’Oncogénèse pour de Nouvelles Approches Thérapeutiques, Université Paris-Saclay, 94805 Villejuif, France; (D.L.); (F.P.); (Y.A.L.-B.); (S.D.)
| | - Félix Peyre
- Centre National de Recherche Scientifique (CNRS), Institut Gustave Roussy, Aspects Métaboliques et Systémiques de l’Oncogénèse pour de Nouvelles Approches Thérapeutiques, Université Paris-Saclay, 94805 Villejuif, France; (D.L.); (F.P.); (Y.A.L.-B.); (S.D.)
| | - Yahir Alberto Loissell-Baltazar
- Centre National de Recherche Scientifique (CNRS), Institut Gustave Roussy, Aspects Métaboliques et Systémiques de l’Oncogénèse pour de Nouvelles Approches Thérapeutiques, Université Paris-Saclay, 94805 Villejuif, France; (D.L.); (F.P.); (Y.A.L.-B.); (S.D.)
| | - Delphine Courilleau
- Inserm, Centre National de Recherche Scientifique (CNRS), Ingénierie et Plateformes au Service de l’Innovation Thérapeutique, Université Paris-Saclay, 92296 Châtenay-Malabry, France; (D.C.); (V.N.)
| | - Sandra Lacas-Gervais
- Centre Commun de Microscopie Appliquée, CCMA, Université Côte d’Azur, 06103 Nice, France;
| | - Valérie Nicolas
- Inserm, Centre National de Recherche Scientifique (CNRS), Ingénierie et Plateformes au Service de l’Innovation Thérapeutique, Université Paris-Saclay, 92296 Châtenay-Malabry, France; (D.C.); (V.N.)
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, Université Paris-Saclay, CNRS, 91190 Gif-sur-Yvette, France;
| | - Svetlana Dokudovskaya
- Centre National de Recherche Scientifique (CNRS), Institut Gustave Roussy, Aspects Métaboliques et Systémiques de l’Oncogénèse pour de Nouvelles Approches Thérapeutiques, Université Paris-Saclay, 94805 Villejuif, France; (D.L.); (F.P.); (Y.A.L.-B.); (S.D.)
| | - Frédéric Taran
- Département Médicaments et Technologies pour la Santé (DMTS), Université Paris Saclay, CEA, INRAE, SCBM, 91191 Gif-sur-Yvette, France; (F.T.); (J.-C.C.)
| | - Jean-Christophe Cintrat
- Département Médicaments et Technologies pour la Santé (DMTS), Université Paris Saclay, CEA, INRAE, SCBM, 91191 Gif-sur-Yvette, France; (F.T.); (J.-C.C.)
| | - Catherine Brenner
- Centre National de Recherche Scientifique (CNRS), Institut Gustave Roussy, Aspects Métaboliques et Systémiques de l’Oncogénèse pour de Nouvelles Approches Thérapeutiques, Université Paris-Saclay, 94805 Villejuif, France; (D.L.); (F.P.); (Y.A.L.-B.); (S.D.)
- Correspondence:
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10
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Grimbert L, Sanz MN, Gressette M, Rucker-Martin C, Novotova M, Solgadi A, Karoui A, Gomez S, Bedouet K, Jacquet E, Lemaire C, Veksler V, Mericskay M, Ventura-Clapier R, Piquereau J, Garnier A. Spatiotemporal AMPKα2 deletion in mice induces cardiac dysfunction, fibrosis and cardiolipin remodeling associated with mitochondrial dysfunction in males only. Biol Sex Differ 2021; 12:52. [PMID: 34535195 PMCID: PMC8447586 DOI: 10.1186/s13293-021-00394-z] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 08/29/2021] [Indexed: 11/13/2022] Open
Abstract
Background The AMP-activated protein kinase (AMPK) is a major regulator of cellular energetics which plays key role in acute metabolic response and in long-term adaptation to stress. Recent works have also suggested non-metabolic effects. Methods To decipher AMPK roles in the heart, we generated a cardio-specific inducible model of gene deletion of the main cardiac catalytic subunit of AMPK (Ampkα2) in mice. This allowed us to avoid the eventual impact of AMPK-KO in peripheral organs. Results Cardio-specific Ampkα2 deficiency led to a progressive left ventricular systolic dysfunction and the development of cardiac fibrosis in males. We observed a reduction in complex I-driven respiration without change in mitochondrial mass or in vitro complex I activity, associated with a rearrangement of the cardiolipins and reduced integration of complex I into the electron transport chain supercomplexes. Strikingly, none of these defects were present in females. Interestingly, suppression of estradiol signaling by ovariectomy partially mimicked the male sensitivity to AMPK loss, notably the cardiac fibrosis and the rearrangement of cardiolipins, but not the cardiac function that remained protected. Conclusion Our results confirm the close link between AMPK and cardiac mitochondrial function, but also highlight links with cardiac fibrosis. Importantly, we show that AMPK is differently involved in these processes in males and females, which may have clinical implications for the use of AMPK activators in the treatment of heart failure. AMPK is a metabolic sensor of cellular energy which regulates energy homeostasis. We generated a cardiac-specific inducible deletion of Ampkα2 and demonstrated that this deletion induces mild cardiac dysfunction in male only. Cardiac dysfunction observed in males was associated with cardiac fibrosis and cardiac cardiolipin remodeling that are not seen in females. Although no significant cardiac function alteration was noticed in ovariectomized female Ampkα2ciKO mice, these latter exhibited cardiac fibrosis and mild cardiolipins remodeling. Our results show a higher dependence on AMPK signaling fibrosis and cardiolipin biosynthesis/maturation in males, either due to the absence of female hormones protection or/and to the action of male hormones. This may contribute to the known difference in cardiovascular risk and outcome between sexes.
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Affiliation(s)
- Lucile Grimbert
- Faculté de Pharmacie, UMR-S1180, INSERM, Université Paris-Saclay, 5 rue J-B Clément, 92296, Châtenay-Malabry, France
| | - Maria-Nieves Sanz
- Faculté de Pharmacie, UMR-S1180, INSERM, Université Paris-Saclay, 5 rue J-B Clément, 92296, Châtenay-Malabry, France
| | - Mélanie Gressette
- Faculté de Pharmacie, UMR-S1180, INSERM, Université Paris-Saclay, 5 rue J-B Clément, 92296, Châtenay-Malabry, France
| | - Catherine Rucker-Martin
- Université Paris-Saclay, Inserm, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, 92350, Le Plessis Robinson, France
| | - Marta Novotova
- Department of Cellular Cardiology, Institute of Experimental Endocrinology, Biomedical Research Center, University Science Park for Biomedicine, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Audrey Solgadi
- Service d'Analyse des Médicaments et Métabolites, Université Paris-Saclay, Inserm, CNRS, Institut Paris Saclay d'Innovation Thérapeutique, 92296, Châtenay-Malabry, France
| | - Ahmed Karoui
- Faculté de Pharmacie, UMR-S1180, INSERM, Université Paris-Saclay, 5 rue J-B Clément, 92296, Châtenay-Malabry, France
| | - Susana Gomez
- Faculté de Pharmacie, UMR-S1180, INSERM, Université Paris-Saclay, 5 rue J-B Clément, 92296, Châtenay-Malabry, France
| | - Kaveen Bedouet
- Faculté de Pharmacie, UMR-S1180, INSERM, Université Paris-Saclay, 5 rue J-B Clément, 92296, Châtenay-Malabry, France
| | - Eric Jacquet
- Université Paris-Saclay, CNRS, Institut de Chimie Des Substances Naturelles, UPR 2301, 91198, Gif-sur-Yvette, France
| | - Christophe Lemaire
- Faculté de Pharmacie, UMR-S1180, INSERM, Université Paris-Saclay, 5 rue J-B Clément, 92296, Châtenay-Malabry, France.,Université Versailles St-Quentin, Université Paris-Saclay, Inserm, UMR-S 1180, 92296, Châtenay-Malabry, France
| | - Vladimir Veksler
- Faculté de Pharmacie, UMR-S1180, INSERM, Université Paris-Saclay, 5 rue J-B Clément, 92296, Châtenay-Malabry, France
| | - Mathias Mericskay
- Faculté de Pharmacie, UMR-S1180, INSERM, Université Paris-Saclay, 5 rue J-B Clément, 92296, Châtenay-Malabry, France
| | - Renée Ventura-Clapier
- Faculté de Pharmacie, UMR-S1180, INSERM, Université Paris-Saclay, 5 rue J-B Clément, 92296, Châtenay-Malabry, France
| | - Jérôme Piquereau
- Faculté de Pharmacie, UMR-S1180, INSERM, Université Paris-Saclay, 5 rue J-B Clément, 92296, Châtenay-Malabry, France.
| | - Anne Garnier
- Faculté de Pharmacie, UMR-S1180, INSERM, Université Paris-Saclay, 5 rue J-B Clément, 92296, Châtenay-Malabry, France
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11
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Malard F, Jacquet E, Nhiri N, Sizun C, Chabrier A, Messaoudi S, Dejeu J, Betzi S, Zhang X, Thureau A, Lescop E. Revisiting the Molecular Interactions between the Tumor Protein TCTP and the Drugs Sertraline/Thioridazine. ChemMedChem 2021; 17:e202100528. [PMID: 34472703 DOI: 10.1002/cmdc.202100528] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Indexed: 11/07/2022]
Abstract
TCTP protein is a pharmacological target in cancer and TCTP inhibitors such as sertraline have been evaluated in clinical trials. The direct interaction of TCTP with the drugs sertraline and thioridazine has been reported in vitro by SPR experiments to be in the ∼30-50 μM Kd range (Amson et al. Nature Med 2012), supporting a TCTP-dependent mode of action of the drugs on tumor cells. However, the molecular details of the interaction remain elusive although they are crucial to improve the efforts of on-going medicinal chemistry. In addition, TCTP can be phosphorylated by the Plk-1 kinase, which is indicative of poor prognosis in several cancers. The impact of phosphorylation on TCTP structure/dynamics and binding with therapeutical ligands remains unexplored. Here, we combined NMR, TSA, SPR, BLI and ITC techniques to probe the molecular interactions between TCTP with the drugs sertraline and thioridazine. We reveal that drug binding is much weaker than reported with an apparent ∼mM Kd and leads to protein destabilization that obscured the analysis of the published SPR data. We further demonstrate by NMR and SAXS that TCTP S46 phosphorylation does not promote tighter interaction between TCTP and sertraline. Accordingly, we question the supported model in which sertraline and thioridazine directly interact with isolated TCTP in tumor cells and discuss alternative modes of action for the drugs in light of current literature.
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Affiliation(s)
- Florian Malard
- Institut de Chimie des Substances Naturelles, CNRS, Université Paris-Saclay, 1 av. de la terrasse, 91198, Gif-sur-Yvette, France
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, CNRS, Université Paris-Saclay, 1 av. de la terrasse, 91198, Gif-sur-Yvette, France
| | - Naima Nhiri
- Institut de Chimie des Substances Naturelles, CNRS, Université Paris-Saclay, 1 av. de la terrasse, 91198, Gif-sur-Yvette, France
| | - Christina Sizun
- Institut de Chimie des Substances Naturelles, CNRS, Université Paris-Saclay, 1 av. de la terrasse, 91198, Gif-sur-Yvette, France
| | - Amélie Chabrier
- Université Paris-Saclay, BioCIS, Faculté de Pharmacie, CNRS, 92290, Châtenay-Malabry, France
| | - Samir Messaoudi
- Université Paris-Saclay, BioCIS, Faculté de Pharmacie, CNRS, 92290, Châtenay-Malabry, France
| | - Jérôme Dejeu
- Univ. Grenoble Alpes, CNRS, DCM, 38000, Grenoble, France
| | - Stéphane Betzi
- Centre de Recherche en Cancérologie de Marseille (CRCM), CNRS, Aix-Marseille Université, Inserm, Institut Paoli-Calmettes, 27 bd Lei Roure, 13273, Marseille CEDEX 9, France
| | - Xu Zhang
- Centre de Recherche en Cancérologie de Marseille (CRCM), CNRS, Aix-Marseille Université, Inserm, Institut Paoli-Calmettes, 27 bd Lei Roure, 13273, Marseille CEDEX 9, France
| | | | - Ewen Lescop
- Institut de Chimie des Substances Naturelles, CNRS, Université Paris-Saclay, 1 av. de la terrasse, 91198, Gif-sur-Yvette, France
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12
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Labarde A, Jakutyte L, Billaudeau C, Fauler B, López-Sanz M, Ponien P, Jacquet E, Mielke T, Ayora S, Carballido-López R, Tavares P. Temporal compartmentalization of viral infection in bacterial cells. Proc Natl Acad Sci U S A 2021; 118:e2018297118. [PMID: 34244425 PMCID: PMC8285916 DOI: 10.1073/pnas.2018297118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Virus infection causes major rearrangements in the subcellular architecture of eukaryotes, but its impact in prokaryotic cells was much less characterized. Here, we show that infection of the bacterium Bacillus subtilis by bacteriophage SPP1 leads to a hijacking of host replication proteins to assemble hybrid viral-bacterial replisomes for SPP1 genome replication. Their biosynthetic activity doubles the cell total DNA content within 15 min. Replisomes operate at several independent locations within a single viral DNA focus positioned asymmetrically in the cell. This large nucleoprotein complex is a self-contained compartment whose boundaries are delimited neither by a membrane nor by a protein cage. Later during infection, SPP1 procapsids localize at the periphery of the viral DNA compartment for genome packaging. The resulting DNA-filled capsids do not remain associated to the DNA transactions compartment. They bind to phage tails to build infectious particles that are stored in warehouse compartments spatially independent from the viral DNA. Free SPP1 structural proteins are recruited to the dynamic phage-induced compartments following an order that recapitulates the viral particle assembly pathway. These findings show that bacteriophages restructure the crowded host cytoplasm to confine at different cellular locations the sequential processes that are essential for their multiplication.
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Affiliation(s)
- Audrey Labarde
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | - Lina Jakutyte
- Laboratoire de Virologie Moléculaire et Structurale, CNRS Unité Propre de Recherche 3296 and Institut Fédératif de Recherche 115, 91198 Gif-sur-Yvette, France
| | - Cyrille Billaudeau
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Beatrix Fauler
- Microscopy and Cryo-electron Microscopy Service Group, Max Planck Institute for Molecular Genetics, Ihnestrasse 63-73, 14195, Berlin, Germany
| | - Maria López-Sanz
- Department of Microbial Biotechnology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, 28049 Madrid, Spain
| | - Prishila Ponien
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198, Gif-sur-Yvette, France
| | - Eric Jacquet
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198, Gif-sur-Yvette, France
| | - Thorsten Mielke
- Microscopy and Cryo-electron Microscopy Service Group, Max Planck Institute for Molecular Genetics, Ihnestrasse 63-73, 14195, Berlin, Germany
| | - Silvia Ayora
- Department of Microbial Biotechnology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, 28049 Madrid, Spain
| | - Rut Carballido-López
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Paulo Tavares
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France;
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Shikura N, Darbon E, Esnault C, Deniset-Besseau A, Xu D, Lejeune C, Jacquet E, Nhiri N, Sago L, Cornu D, Werten S, Martel C, Virolle MJ. The Phosin PptA Plays a Negative Role in the Regulation of Antibiotic Production in Streptomyces lividans. Antibiotics (Basel) 2021; 10:325. [PMID: 33804592 PMCID: PMC8003754 DOI: 10.3390/antibiotics10030325] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/16/2021] [Accepted: 03/17/2021] [Indexed: 12/30/2022] Open
Abstract
In Streptomyces, antibiotic biosynthesis is triggered in phosphate limitation that is usually correlated with energetic stress. Polyphosphates constitute an important reservoir of phosphate and energy and a better understanding of their role in the regulation of antibiotic biosynthesis is of crucial importance. We previously characterized a gene, SLI_4384/ppk, encoding a polyphosphate kinase, whose disruption greatly enhanced the weak antibiotic production of Streptomyces lividans. In the condition of energetic stress, Ppk utilizes polyP as phosphate and energy donor, to generate ATP from ADP. In this paper, we established that ppk is co-transcribed with its two downstream genes, SLI_4383, encoding a phosin called PptA possessing a CHAD domain constituting a polyphosphate binding module and SLI_4382 encoding a nudix hydrolase. The expression of the ppk/pptA/SLI_4382 operon was shown to be under the positive control of the two-component system PhoR/PhoP and thus mainly expressed in condition of phosphate limitation. However, pptA and SLI_4382 can also be transcribed alone from their own promoter. The deletion of pptA resulted into earlier and stronger actinorhodin production and lower lipid content than the disruption of ppk, whereas the deletion of SLI_4382 had no obvious phenotypical consequences. The disruption of ppk was shown to have a polar effect on the expression of pptA, suggesting that the phenotype of the ppk mutant might be linked, at least in part, to the weak expression of pptA in this strain. Interestingly, the expression of phoR/phoP and that of the genes of the pho regulon involved in phosphate supply or saving were strongly up-regulated in pptA and ppk mutants, revealing that both mutants suffer from phosphate stress. Considering the presence of a polyphosphate binding module in PptA, but absence of similarities between PptA and known exo-polyphosphatases, we proposed that PptA constitutes an accessory factor for exopolyphosphatases or general phosphatases involved in the degradation of polyphosphates into phosphate.
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Affiliation(s)
- Noriyasu Shikura
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, 91198 Gif-sur-Yvette, France; (N.S.); (E.D.); (C.E.); (D.X.); (C.L.); (L.S.); (D.C.); (C.M.)
| | - Emmanuelle Darbon
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, 91198 Gif-sur-Yvette, France; (N.S.); (E.D.); (C.E.); (D.X.); (C.L.); (L.S.); (D.C.); (C.M.)
| | - Catherine Esnault
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, 91198 Gif-sur-Yvette, France; (N.S.); (E.D.); (C.E.); (D.X.); (C.L.); (L.S.); (D.C.); (C.M.)
| | - Ariane Deniset-Besseau
- Laboratoire de Chimie Physique (LCP), CNRS UMR 8000, Université Paris-Saclay, 91405 Orsay, France;
| | - Delin Xu
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, 91198 Gif-sur-Yvette, France; (N.S.); (E.D.); (C.E.); (D.X.); (C.L.); (L.S.); (D.C.); (C.M.)
- Department of Ecology, Institute of Hydrobiology, School of Life Science and Technology, Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering, Ministry of Education, Jinan University, Guangzhou 510632, China
| | - Clara Lejeune
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, 91198 Gif-sur-Yvette, France; (N.S.); (E.D.); (C.E.); (D.X.); (C.L.); (L.S.); (D.C.); (C.M.)
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, CNRS, Université Paris Saclay, 91190 Gif-sur-Yvette, France; (E.J.); (N.N.)
| | - Naima Nhiri
- Institut de Chimie des Substances Naturelles, CNRS, Université Paris Saclay, 91190 Gif-sur-Yvette, France; (E.J.); (N.N.)
| | - Laila Sago
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, 91198 Gif-sur-Yvette, France; (N.S.); (E.D.); (C.E.); (D.X.); (C.L.); (L.S.); (D.C.); (C.M.)
| | - David Cornu
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, 91198 Gif-sur-Yvette, France; (N.S.); (E.D.); (C.E.); (D.X.); (C.L.); (L.S.); (D.C.); (C.M.)
| | - Sebastiaan Werten
- Institute of Biological Chemistry, Biocenter, Medical University of Innsbruck, Innrain 80, 6020 Innsbruck, Austria;
| | - Cécile Martel
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, 91198 Gif-sur-Yvette, France; (N.S.); (E.D.); (C.E.); (D.X.); (C.L.); (L.S.); (D.C.); (C.M.)
| | - Marie-Joelle Virolle
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, 91198 Gif-sur-Yvette, France; (N.S.); (E.D.); (C.E.); (D.X.); (C.L.); (L.S.); (D.C.); (C.M.)
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Garnier A, Bork NI, Jacquet E, Zipfel S, Muñoz-Guijosa C, Baczkó I, Reichenspurner H, Donzeau-Gouge P, Maier LS, Dobrev D, Girdauskas E, Nikolaev VO, Fischmeister R, Molina CE. Mapping genetic changes in the cAMP-signaling cascade in human atria. J Mol Cell Cardiol 2021; 155:10-20. [PMID: 33631188 DOI: 10.1016/j.yjmcc.2021.02.006] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/04/2021] [Accepted: 02/11/2021] [Indexed: 11/15/2022]
Abstract
AIM To obtain a quantitative expression profile of the main genes involved in the cAMP-signaling cascade in human control atria and in different cardiac pathologies. METHODS AND RESULTS Expression of 48 target genes playing a relevant role in the cAMP-signaling cascade was assessed by RT-qPCR. 113 samples were obtained from right atrial appendages (RAA) of patients in sinus rhythm (SR) with or without atrium dilation, paroxysmal atrial fibrillation (AF), persistent AF or heart failure (HF); and left atrial appendages (LAA) from patients in SR or with AF. Our results show that right and left atrial appendages in donor hearts or from SR patients have similar expression values except for AC7 and PDE2A. Despite the enormous chamber-dependent variability in the gene-expression changes between pathologies, several distinguishable patterns could be identified. PDE8A, PI3Kγ and EPAC2 were upregulated in AF. Different phosphodiesterase (PDE) families showed specific pathology-dependent changes. CONCLUSION By comparing mRNA-expression patterns of the cAMP-signaling cascade related genes in right and left atrial appendages of human hearts and across different pathologies, we show that 1) gene expression is not significantly affected by cardioplegic solution content, 2) it is appropriate to use SR atrial samples as controls, and 3) many genes in the cAMP-signaling cascade are affected in AF and HF but only few of them appear to be chamber (right or left) specific. TOPIC Genetic changes in human diseased atria. TRANSLATIONAL PERSPECTIVE The cyclic AMP signaling pathway is important for atrial function. However, expression patterns of the genes involved in the atria of healthy and diseased hearts are still unclear. We give here a general overview of how different pathologies affect the expression of key genes in the cAMP signaling pathway in human right and left atria appendages. Our study may help identifying new genes of interest as potential therapeutic targets or clinical biomarkers for these pathologies and could serve as a guide in future gene therapy studies.
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Affiliation(s)
- Anne Garnier
- Université Paris-Saclay, Inserm, UMR-S 1180, Châtenay-Malabry, France
| | - Nadja I Bork
- Institute of Experimental Cardiovascular Research, University Medical Center Hamburg-Eppendorf, Germany; German Center for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Germany
| | - Eric Jacquet
- Université Paris-Saclay, Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Gif-sur-Yvette, France
| | - Svante Zipfel
- Dept. of Cardiovascular Surgery, University Heart Center Hamburg, Germany
| | | | - Istvan Baczkó
- Dept. Pharmacology and Pharmacotherapy, Univ. of Szeged, Hungary
| | | | | | - Lars S Maier
- Dept. Internal Medicine II, University Heart Center, University Hospital Regensburg, Germany
| | - Dobromir Dobrev
- Institute of Pharmacology, West-German Heart and Vascular Center, Faculty of Medicine, University Duisburg-, Essen, Germany
| | - Evaldas Girdauskas
- German Center for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Germany; Dept. of Cardiovascular Surgery, University Heart Center Hamburg, Germany
| | - Viacheslav O Nikolaev
- Institute of Experimental Cardiovascular Research, University Medical Center Hamburg-Eppendorf, Germany; German Center for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Germany
| | | | - Cristina E Molina
- Université Paris-Saclay, Inserm, UMR-S 1180, Châtenay-Malabry, France; Institute of Experimental Cardiovascular Research, University Medical Center Hamburg-Eppendorf, Germany; German Center for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Germany
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15
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Condamina M, Penso L, Tran VT, Hotz C, Guillem P, Villani AP, Perrot P, Bru MF, Jacquet E, Nassif A, Bachelez H, Wolkenstein P, Beylot-Barry M, Richard MA, Ravaud P, Viguier M, Sbidian E. Baseline Characteristics of a National French E-Cohort of Hidradenitis Suppurativa in ComPaRe and Comparison with Other Large Hidradenitis Suppurativa Cohorts. Dermatology 2021; 237:748-758. [PMID: 33503635 DOI: 10.1159/000513447] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 08/11/2020] [Accepted: 11/29/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Hidradenitis suppurativa (HS) is a chronic inflammatory skin condition substantially impacting patients' quality of life; the pathogenesis remains unclear, and treatment is complex and not yet standardized. Observational data are increasingly being used to evaluate therapeutics in "real-life" interventions, and the development of e-cohorts is offering new tools for epidemiological studies at the population level. OBJECTIVE The aim of this study was to describe the clinical characteristics and treatment history of HS participants in the Community of Patients for Research (ComPaRe) cohort and to compare these to other cohorts. METHODS We performed a cross-sectional study of the baseline data of HS participants in ComPaRe, an e-cohort of patients with chronic diseases. Data were collected using patient-reported questionnaires about clinical-dem-ographic aspects, quality of life, and treatment history. RESULTS A total of 396 participants (339 females, 57 males) were included (mean age 38 years); 83 (21%) had a family history of HS, 227 (57.3%) were current smokers, and 241 (60.9%) were overweight or obese. Most of the participants declared a Hurley stage II (n = 263, 66.4%) or III (n = 76, 20.3%). The breast was more frequently affected in women than men (37.5 vs. 5.3%, p < 0.0001), whereas the dorsal region was more frequently affected in men (39.5 vs. 10.9%, p < 0.0001). Increased disease stage was associated with obesity (25.9 vs. 33.8 vs. 51.3%, p = 0.02) and some HS localizations (genital [p < 0.005], pubis [p < 0.007], gluteal fold [p = 0.02], and groin [p < 0.0001]). The most frequently prescribed treatments were oral antibiotics (n = 362, 91.4%), especially amoxicillin-clavulanic acid and cyclins. Less than 10% of participants received biologics. Most of these results were consistent with previously published cohorts. CONCLUSION Recruitment of participants by such a web platform can be a faster way to get relevant scientific data for a wide variety of patients that could be used for epidemiological studies and to evaluate therapeutics in "real-life" interventions.
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Affiliation(s)
- Morgane Condamina
- Department of Dermatology-Venereology, Robert-Debré Hospital, Reims, France
| | - Laetitia Penso
- Paris-Est University, UPEC, EA 7379 EpiDermE (Epidemiologie En Dermatologie et Evaluation des Thérapeutiques), Créteil, France
| | - Viet-Thi Tran
- Center for Clinical Epidemiology, Hôtel-Dieu Hospital (AP-HP), Paris, France.,Centre de Recherche Épidémiologie et StatistiqueS (CRESS), Université de Paris, INSERM UMR1153, Paris, France
| | - Claire Hotz
- Department of Dermatology-Venereology, Henri Mondor Hospital (AP-HP), Paris Est Créteil University, Créteil, France
| | - Philippe Guillem
- Department of Visceral and Digestive Surgery, Val d'Ouest Clinic, Écully, France.,RésoVerneuil, Paris, France.,European Hidradenitis Suppurativa Foundation, Dessau, Germany.,Groupe de Recherche en Proctologie de la Société Nationale Française de Coloproctologie, Paris, France
| | | | - Pierre Perrot
- Department of Plastic and Reconstructive Surgery, Hôtel-Dieu Hospital, Nantes, France
| | - Marie-France Bru
- Patient Member of the Scientific Committee of ComPaRe Verneuil Disease, Paris, France
| | - Eric Jacquet
- Department of Visceral Surgery, Beau Soleil Clinic, Montpellier, France
| | - Aude Nassif
- Medical Center, Institut Pasteur, Paris, France
| | - Hervé Bachelez
- Department of Dermatology-Venereology, Saint Louis Hospital (AP-HP), Sorbonne Paris Cité University Paris Diderot, Paris, France.,Laboratory of Genetics of Skin Diseases, INSERM U1163, Imagine Institute, Paris, France
| | - Pierre Wolkenstein
- Paris-Est University, UPEC, EA 7379 EpiDermE (Epidemiologie En Dermatologie et Evaluation des Thérapeutiques), Créteil, France.,Department of Dermatology-Venereology, Henri Mondor Hospital (AP-HP), Paris Est Créteil University, Créteil, France
| | - Marie Beylot-Barry
- Department of Dermatology, INSERM 1053, CHU Bordeaux, Bordeaux University, Bordeaux, France
| | - Marie-Aleth Richard
- CEReSS-EA 3279, Research Center in Health Services and Quality of Life, Aix Marseille University, Dermatology Department, University Hospital La Timone, Assistance Publique Hôpitaux de Marseille, Marseille, France
| | - Philippe Ravaud
- Center for Clinical Epidemiology, Hôtel-Dieu Hospital (AP-HP), Paris, France.,Centre de Recherche Épidémiologie et StatistiqueS (CRESS), Université de Paris, INSERM UMR1153, Paris, France
| | - Manuelle Viguier
- Department of Dermatology-Venereology, Robert-Debré Hospital, Reims, France
| | - Emilie Sbidian
- Paris-Est University, UPEC, EA 7379 EpiDermE (Epidemiologie En Dermatologie et Evaluation des Thérapeutiques), Créteil, France, .,Department of Dermatology-Venereology, Henri Mondor Hospital (AP-HP), Paris Est Créteil University, Créteil, France, .,INSERM, Centre d'Investigation Clinique 1430, Créteil, France,
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16
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Condamina M, Tran VT, Penso L, Hotz C, Guillem P, Villani A, Perrot P, Bru MF, Jacquet E, Nassif A, Bachelez H, Wolkenstein P, Beylot-Barry M, Richard MA, Ravaud P, Viguier M, Sbidian E. Caractéristiques cliniques des patients atteints d’hidradénite suppurée participants à la e-cohorte ComPaRe et comparaison avec les données de la littérature. Ann Dermatol Venereol 2020. [DOI: 10.1016/j.annder.2020.09.318] [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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17
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Chevreuil M, Lecoq L, Wang S, Gargowitsch L, Nhiri N, Jacquet E, Zinn T, Fieulaine S, Bressanelli S, Tresset G. Nonsymmetrical Dynamics of the HBV Capsid Assembly and Disassembly Evidenced by Their Transient Species. J Phys Chem B 2020; 124:9987-9995. [PMID: 33135897 DOI: 10.1021/acs.jpcb.0c05024] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
As with many protein multimers studied in biophysics, the assembly and disassembly dynamical pathways of hepatitis B virus (HBV) capsid proteins are not symmetrical. Using time-resolved small-angle X-ray scattering and singular value decomposition analysis, we have investigated these processes in vitro by a rapid change of salinity or chaotropicity. Along the assembly pathway, the classical nucleation-growth mechanism is followed by a slow relaxation phase during which capsid-like transient species self-organize in accordance with the theoretical prediction that the capture of the few last subunits is slow. By contrast, the disassembly proceeds through unexpected, fractal-branched clusters of subunits that eventually vanish over a much longer time scale. On the one hand, our findings confirm and extend previous views as to the hysteresis phenomena observed and theorized in capsid formation and dissociation. On the other hand, they uncover specifics that may directly relate to the functions of HBV subunits in the viral cycle.
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Affiliation(s)
- Maelenn Chevreuil
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405 Orsay, France.,Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | - Lauriane Lecoq
- Molecular Microbiology and Structural Biochemistry (MMSB), Université Claude Bernard Lyon 1, CNRS, 7 passage du Vercors, 69367 Lyon Cedex 07, France
| | - Shishan Wang
- Molecular Microbiology and Structural Biochemistry (MMSB), Université Claude Bernard Lyon 1, CNRS, 7 passage du Vercors, 69367 Lyon Cedex 07, France
| | - Laetitia Gargowitsch
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405 Orsay, France
| | - Naïma Nhiri
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198, Gif-sur-Yvette, France
| | - Eric Jacquet
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198, Gif-sur-Yvette, France
| | - Thomas Zinn
- ESRF - The European Synchrotron, 71 avenue des Martyrs, 38043 Grenoble Cedex 9, France
| | - Sonia Fieulaine
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | - Stéphane Bressanelli
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | - Guillaume Tresset
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405 Orsay, France
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18
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Reda M, Noel C, Settembre N, Chambert J, Lejeune A, Jacquet E. Agent-based modelling of the smooth muscle cells migration induced by mechanical vibration: a preliminary study. Comput Methods Biomech Biomed Engin 2020. [DOI: 10.1080/10255842.2020.1815326] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- M. Reda
- Institut national de recherche et de sécurité (INRS), Vandoeuvre-Lès-Nancy, France
- Department of Applied Mechanics, Univ. Bourgogne Franche-Comté, FEMTO-ST Institute UFC/CNRS/ENSMM/UTBM, Besançon, France
| | - C. Noel
- Institut national de recherche et de sécurité (INRS), Vandoeuvre-Lès-Nancy, France
| | - N. Settembre
- Department of Vascular Surgery, Nancy University Hospital, Nancy, France
| | - J. Chambert
- Department of Applied Mechanics, Univ. Bourgogne Franche-Comté, FEMTO-ST Institute UFC/CNRS/ENSMM/UTBM, Besançon, France
| | - A. Lejeune
- Department of Applied Mechanics, Univ. Bourgogne Franche-Comté, FEMTO-ST Institute UFC/CNRS/ENSMM/UTBM, Besançon, France
| | - E. Jacquet
- Department of Applied Mechanics, Univ. Bourgogne Franche-Comté, FEMTO-ST Institute UFC/CNRS/ENSMM/UTBM, Besançon, France
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19
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Elouneg A, Lucot Q, Veyrat-Durebex E, Lejeune A, Chambert J, Lihoreau T, Chatelain B, Rolin G, Jacquet E. Biomechanical characterization of earlobe keloid by ring suction test. Comput Methods Biomech Biomed Engin 2020. [DOI: 10.1080/10255842.2020.1812173] [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: 10/23/2022]
Affiliation(s)
- A. Elouneg
- Univ. Bourgogne Franche-Comté, FEMTO-ST Department of Applied Mechanics, CNRS/UFC/ENSMM/UTBM, Besançon, France
| | - Q. Lucot
- Univ. Bourgogne Franche-Comté, FEMTO-ST Department of Applied Mechanics, CNRS/UFC/ENSMM/UTBM, Besançon, France
| | - E. Veyrat-Durebex
- Univ. Bourgogne Franche-Comté, FEMTO-ST Department of Applied Mechanics, CNRS/UFC/ENSMM/UTBM, Besançon, France
| | - A. Lejeune
- Univ. Bourgogne Franche-Comté, FEMTO-ST Department of Applied Mechanics, CNRS/UFC/ENSMM/UTBM, Besançon, France
| | - J. Chambert
- Univ. Bourgogne Franche-Comté, FEMTO-ST Department of Applied Mechanics, CNRS/UFC/ENSMM/UTBM, Besançon, France
| | - T. Lihoreau
- CHU Besançon, INSERM CIC 1431, Centre d'Investigation Clinique, Besançon, France
| | - B. Chatelain
- CHU Besançon, INSERM CIC 1431, Centre d'Investigation Clinique, Besançon, France
- CHU Besançon, Department of Maxillo-Facial Surgery, Besançon, France
| | - G. Rolin
- CHU Besançon, INSERM CIC 1431, Centre d'Investigation Clinique, Besançon, France
| | - E. Jacquet
- Univ. Bourgogne Franche-Comté, FEMTO-ST Department of Applied Mechanics, CNRS/UFC/ENSMM/UTBM, Besançon, France
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20
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Munoz-Montesino C, Larkem D, Barbereau C, Igel-Egalon A, Truchet S, Jacquet E, Nhiri N, Moudjou M, Sizun C, Rezaei H, Béringue V, Dron M. A seven-residue deletion in PrP leads to generation of a spontaneous prion formed from C-terminal C1 fragment of PrP. J Biol Chem 2020; 295:14025-14039. [PMID: 32788216 DOI: 10.1074/jbc.ra120.014738] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 06/08/2020] [Revised: 07/27/2020] [Indexed: 12/17/2022] Open
Abstract
Prions result from a drastic conformational change of the host-encoded cellular prion protein (PrP), leading to the formation of β-sheet-rich, insoluble, and protease-resistant self-replicating assemblies (PrPSc). The cellular and molecular mechanisms involved in spontaneous prion formation in sporadic and inherited human prion diseases or equivalent animal diseases are poorly understood, in part because cell models of spontaneously forming prions are currently lacking. Here, extending studies on the role of the H2 α-helix C terminus of PrP, we found that deletion of the highly conserved 190HTVTTTT196 segment of ovine PrP led to spontaneous prion formation in the RK13 rabbit kidney cell model. On long-term passage, the mutant cells stably produced proteinase K (PK)-resistant, insoluble, and aggregated assemblies that were infectious for naïve cells expressing either the mutant protein or other PrPs with slightly different deletions in the same area. The electrophoretic pattern of the PK-resistant core of the spontaneous prion (ΔSpont) contained mainly C-terminal polypeptides akin to C1, the cell-surface anchored C-terminal moiety of PrP generated by natural cellular processing. RK13 cells expressing solely the Δ190-196 C1 PrP construct, in the absence of the full-length protein, were susceptible to ΔSpont prions. ΔSpont infection induced the conversion of the mutated C1 into a PK-resistant and infectious form perpetuating the biochemical characteristics of ΔSpont prion. In conclusion, this work provides a unique cell-derived system generating spontaneous prions and provides evidence that the 113 C-terminal residues of PrP are sufficient for a self-propagating prion entity.
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Affiliation(s)
- Carola Munoz-Montesino
- Université Paris-Saclay, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Université de Versailles Saint-Quentin-en-Yvelines, Virologie et Immunologie Moléculaires, Jouy-en-Josas, France
| | - Djabir Larkem
- Université Paris-Saclay, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Université de Versailles Saint-Quentin-en-Yvelines, Virologie et Immunologie Moléculaires, Jouy-en-Josas, France
| | - Clément Barbereau
- Université Paris-Saclay, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Université de Versailles Saint-Quentin-en-Yvelines, Virologie et Immunologie Moléculaires, Jouy-en-Josas, France
| | - Angélique Igel-Egalon
- Université Paris-Saclay, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Université de Versailles Saint-Quentin-en-Yvelines, Virologie et Immunologie Moléculaires, Jouy-en-Josas, France
| | - Sandrine Truchet
- Université Paris-Saclay, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Université de Versailles Saint-Quentin-en-Yvelines, Virologie et Immunologie Moléculaires, Jouy-en-Josas, France
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Naïma Nhiri
- Institut de Chimie des Substances Naturelles, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Mohammed Moudjou
- Université Paris-Saclay, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Université de Versailles Saint-Quentin-en-Yvelines, Virologie et Immunologie Moléculaires, Jouy-en-Josas, France
| | - Christina Sizun
- Institut de Chimie des Substances Naturelles, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Human Rezaei
- Université Paris-Saclay, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Université de Versailles Saint-Quentin-en-Yvelines, Virologie et Immunologie Moléculaires, Jouy-en-Josas, France
| | - Vincent Béringue
- Université Paris-Saclay, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Université de Versailles Saint-Quentin-en-Yvelines, Virologie et Immunologie Moléculaires, Jouy-en-Josas, France
| | - Michel Dron
- Université Paris-Saclay, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Université de Versailles Saint-Quentin-en-Yvelines, Virologie et Immunologie Moléculaires, Jouy-en-Josas, France
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21
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Rivière G, Oueslati S, Gayral M, Créchet JB, Nhiri N, Jacquet E, Cintrat JC, Giraud F, van Heijenoort C, Lescop E, Pethe S, Iorga BI, Naas T, Guittet E, Morellet N. NMR Characterization of the Influence of Zinc(II) Ions on the Structural and Dynamic Behavior of the New Delhi Metallo-β-Lactamase-1 and on the Binding with Flavonols as Inhibitors. ACS Omega 2020; 5:10466-10480. [PMID: 32426604 PMCID: PMC7226869 DOI: 10.1021/acsomega.0c00590] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 04/15/2020] [Indexed: 05/22/2023]
Abstract
New Delhi metallo-β-lactamase-1 (NDM-1) has recently emerged as a global threat because of its ability to confer resistance to all common β-lactam antibiotics. Understanding the molecular basis of β-lactam hydrolysis by NDM is crucial for designing NDM inhibitors or β-lactams resistant to their hydrolysis. In this study, for the first time, NMR was used to study the influence of Zn(II) ions on the dynamic behavior of NDM-1. Our results highlighted that the binding of Zn(II) in the NDM-1 active site induced several structural and dynamic changes on active site loop 2 (ASL2) and L9 loops and on helix α2. We subsequently studied the interaction of several flavonols: morin, quercetin, and myricetin were identified as natural and specific inhibitors of NDM-1. Quercetin conjugates were also synthesized in an attempt to increase the solubility and bioavailability. Our NMR investigations on NDM-1/flavonol interactions highlighted that both Zn(II) ions and the residues of the NDM-1 ASL1, ASL2, and ASL4 loops are involved in the binding of flavonols. This is the first NMR interaction study of NDM-1/inhibitors, and the models generated using HADDOCK will be useful for the rational design of more active inhibitors, directed against NDM-1.
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Affiliation(s)
- Gwladys Rivière
- Institut
de Chimie des Substances Naturelles, CNRS UPR 2301, Université
Paris-Sud, Université Paris-Saclay, LabEx LERMIT, 1 avenue de la Terrasse, 91190 Gif-sur-Yvette, France
| | - Saoussen Oueslati
- EA7361
“Structure, Dynamic, Function and Expression of Broad Spectrum
β-Lactamases”, Faculty of Medicine, Université Paris-Sud, Université Paris-Saclay, LabEx LERMIT, Le Kremlin-Bicêtre, France
| | - Maud Gayral
- Institut
de Chimie Moléculaire et des Matériaux d’Orsay
(ICMMO), CNRS, Université Paris Sud, Université Paris-Saclay, 15 rue Georges Clemenceau, 91405 Orsay Cedex, France
| | | | - Naïma Nhiri
- Institut
de Chimie des Substances Naturelles, CNRS UPR 2301, Université
Paris-Sud, Université Paris-Saclay, LabEx LERMIT, 1 avenue de la Terrasse, 91190 Gif-sur-Yvette, France
| | - Eric Jacquet
- Institut
de Chimie des Substances Naturelles, CNRS UPR 2301, Université
Paris-Sud, Université Paris-Saclay, LabEx LERMIT, 1 avenue de la Terrasse, 91190 Gif-sur-Yvette, France
| | - Jean-Christophe Cintrat
- Service
de Chimie Bio-organique et Marquage (SCBM), CEA, Université Paris-Saclay, LabEx LERMIT, 91191 Gif/Yvette, France
| | - François Giraud
- Institut
de Chimie des Substances Naturelles, CNRS UPR 2301, Université
Paris-Sud, Université Paris-Saclay, LabEx LERMIT, 1 avenue de la Terrasse, 91190 Gif-sur-Yvette, France
| | - Carine van Heijenoort
- Institut
de Chimie des Substances Naturelles, CNRS UPR 2301, Université
Paris-Sud, Université Paris-Saclay, LabEx LERMIT, 1 avenue de la Terrasse, 91190 Gif-sur-Yvette, France
| | - Ewen Lescop
- Institut
de Chimie des Substances Naturelles, CNRS UPR 2301, Université
Paris-Sud, Université Paris-Saclay, LabEx LERMIT, 1 avenue de la Terrasse, 91190 Gif-sur-Yvette, France
| | - Stéphanie Pethe
- EA7361
“Structure, Dynamic, Function and Expression of Broad Spectrum
β-Lactamases”, Faculty of Medicine, Université Paris-Sud, Université Paris-Saclay, LabEx LERMIT, Le Kremlin-Bicêtre, France
| | - Bogdan I. Iorga
- Institut
de Chimie des Substances Naturelles, CNRS UPR 2301, Université
Paris-Sud, Université Paris-Saclay, LabEx LERMIT, 1 avenue de la Terrasse, 91190 Gif-sur-Yvette, France
| | - Thierry Naas
- EA7361
“Structure, Dynamic, Function and Expression of Broad Spectrum
β-Lactamases”, Faculty of Medicine, Université Paris-Sud, Université Paris-Saclay, LabEx LERMIT, Le Kremlin-Bicêtre, France
- . Phone:(33)145212019 or (33)145213030. Fax: (33)145216340
| | - Eric Guittet
- Institut
de Chimie des Substances Naturelles, CNRS UPR 2301, Université
Paris-Sud, Université Paris-Saclay, LabEx LERMIT, 1 avenue de la Terrasse, 91190 Gif-sur-Yvette, France
| | - Nelly Morellet
- Institut
de Chimie des Substances Naturelles, CNRS UPR 2301, Université
Paris-Sud, Université Paris-Saclay, LabEx LERMIT, 1 avenue de la Terrasse, 91190 Gif-sur-Yvette, France
- . Phone:(33)169823762. Fax: (33)169823784
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22
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Thomas L, Guérin D, Quinard B, Jacquet E, Mattana R, Seneor P, Vuillaume D, Mélin T, Lenfant S. Conductance switching at the nanoscale of diarylethene derivative self-assembled monolayers on La 0.7Sr 0.3MnO 3. Nanoscale 2020; 12:8268-8276. [PMID: 32236177 DOI: 10.1039/c9nr09928j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report on the phosphonic acid route for the grafting of functional molecules, optical switch (dithienylethene diphosphonic acid, DDA), on La0.7Sr0.3MnO3 (LSMO). Compact self-assembled monolayers (SAMs) of DDA are formed on LSMO as studied by topographic atomic force microscopy (AFM), ellipsometry, water contact angle measurements and X-ray photoemission spectroscopy (XPS). The conducting AFM measurements show that the electrical conductance of LSMO/DDA is about 3 decades below that of a bare LSMO substrate. Moreover, the presence of the DDA SAM suppresses the known conductance switching of the LSMO substrate that is induced by mechanical and/or bias constraints during C-AFM measurements. A partial light-induced conductance switching between the open and closed forms of the DDA is observed for the LSMO/DDA/C-AFM tip molecular junctions (closed/open conductance ratio of about 8). We show that, in the case of long-time exposure to UV light, this feature can be masked by a non-reversible decrease (a factor of about 15) of the conductance of the LSMO electrode.
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Affiliation(s)
- L Thomas
- Institute for Electronics Microelectronics and Nanotechnology (IEMN), CNRS, Univ. Lille, 59652 Villeneuve d'Ascq, France.
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23
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Brun A, Brunet L, Cerclet D, Masson A, Ravit M, Tassin JP, Zornig S, Zurlo MC, Guénoun T, Missonnier S, Di Rocco V, Mitsopoulou L, Jacquet E, Jung J, Roussillon R. International Health Practices: A Multidisciplinary Approach to Therapeutic Mediations With an Artistic Medium Based on the Model of Play. Front Psychol 2020; 11:254. [PMID: 32180749 PMCID: PMC7059606 DOI: 10.3389/fpsyg.2020.00254] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Accepted: 02/03/2020] [Indexed: 11/13/2022] Open
Abstract
This article, corresponding to a part of the restitution of a financed international research project between France, Brazil, Canada, Italy and Belgium, aims to offer a modelisation and qualitative evaluation of mediation care settings based on an original methodological tool that involves identifying the typical games at the foundations of creativity, following a multidisciplinary perspective. Therapeutic mediations are settings or devices organized around a “pliable medium,” often artistic, like painting, modeling, writing and theater, which are very widespread in institutional practices, both in France and abroad. The scientific objectives of this research consist in a multi-disciplinary exploration (anthropology, criminology, neuroscience, clinical psychology) of the process of creative symbolization understood as a process of transformation involving play. According to this orientation, play can be defined as a psychic process whereby a subjective experience can be explored with pleasure, and consequently symbolized and appropriated. Our fundamental and original hypothesis is that play is at the source of the creative process, conceived as a work of metabolization by the psyche of playful experiences during the different stages of life. The review of the understanding of play in psychoanalysis, anthropology, criminology and neuroscience emphasizes the richness of this model and the importance of reflecting on the typical games in the field of psychic care. A clinical example of treatment in a pictorial therapeutic mediation setting of a child with psychotic disorders makes it possible to identify a number of typical games as well as the modalities of interpretation of the therapists through play. These multidisciplinary studies lead to the presentation of a general table of typical games, and these first results highlight the richness of identifying typical games in clinical settings. Ultimately, the multidisciplinary approach shows the interest of the model of play in the evaluation of therapeutic mediation settings, with a convergence of the different disciplines emphasizing the pertinence of this model. The scientific impact of this research overlaps with its societal impact, through the development of innovative tools for evaluating therapeutic mediations, in order to take account of the evolution of the different forms of social expression of psychic suffering.
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Affiliation(s)
- Anne Brun
- CRPPC, Lumière University Lyon 2, Lyon, France
| | - Louis Brunet
- GREPP, Section Psychodynamique, UQAM, Montreal, QC, Canada
| | - Denis Cerclet
- UMR 5600, Environnement, Ville, Société, Lumière University Lyon 2, Lyon, France
| | - Antonie Masson
- CRID, Interdisciplinaire Déviance et Pénalité, Université catholique de Louvain, Louvain-la-Neuve, Belgium
| | | | - Jean-Pol Tassin
- Neuroscience Paris-Seine UMR 8246 CNRS/U1130 Inserm/Sorbonne Université, Paris, France
| | - Silvia Zornig
- Family and Child, Theory and Clinic, University Pontificale Catholic de Rio de Janeiro, Rio de Janeiro, Brazil
| | - Maria Clelia Zurlo
- Dynamic Psychology Laboratory (PsyDy Lab), University of Naples Federico II, Naples, Italy
| | | | | | | | | | | | - Johan Jung
- CRPPC, Lumière University Lyon 2, Lyon, France
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24
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Jaïs PH, Decroly E, Jacquet E, Le Boulch M, Jaïs A, Jean-Jean O, Eaton H, Ponien P, Verdier F, Canard B, Goncalves S, Chiron S, Le Gall M, Mayeux P, Shmulevitz M. C3P3-G1: first generation of a eukaryotic artificial cytoplasmic expression system. Nucleic Acids Res 2019; 47:2681-2698. [PMID: 30726994 PMCID: PMC6412113 DOI: 10.1093/nar/gkz069] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 12/03/2018] [Accepted: 01/25/2019] [Indexed: 12/25/2022] Open
Abstract
Most eukaryotic expression systems make use of host-cell nuclear transcriptional and post-transcriptional machineries. Here, we present the first generation of the chimeric cytoplasmic capping-prone phage polymerase (C3P3-G1) expression system developed by biological engineering, which generates capped and polyadenylated transcripts in host-cell cytoplasm by means of two components. First, an artificial single-unit chimeric enzyme made by fusing an mRNA capping enzyme and a DNA-dependent RNA polymerase. Second, specific DNA templates designed to operate with the C3P3-G1 enzyme, which encode for the transcripts and their artificial polyadenylation. This system, which can potentially be adapted to any in cellulo or in vivo eukaryotic expression applications, was optimized for transient expression in mammalian cells. C3P3-G1 shows promising results for protein production in Chinese Hamster Ovary (CHO-K1) cells. This work also provides avenues for enhancing the performances for next generation C3P3 systems.
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Affiliation(s)
- Philippe H Jaïs
- Eukarÿs SAS, Génopole Campus 3, 4 rue Pierre Fontaine, 91058 Evry Cedex, France
| | - Etienne Decroly
- Architecture et Fonction des Macromolécules Biologiques (AFMB) UMR 7257 CNRS/AMU, 163 Avenue de Luminy, 13288 Marseille Cedex 9, France
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, CNRS UPR2301, Université Paris-Saclay, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Marine Le Boulch
- Eukarÿs SAS, Génopole Campus 3, 4 rue Pierre Fontaine, 91058 Evry Cedex, France
| | - Aurélien Jaïs
- Eukarÿs SAS, Génopole Campus 3, 4 rue Pierre Fontaine, 91058 Evry Cedex, France
| | - Olivier Jean-Jean
- Sorbonne Université, CNRS-UMR8256, Biological Adaptation and Ageing, Institut de Biologie Paris Seine (B2A-IBPS), F-75252 Paris, France
| | - Heather Eaton
- Medical Microbiology and Immunology, University of Alberta, 6-142J Katz Group Centre for Pharmacy and Health Research, 114 Street NW, Edmonton, Alberta T6G 2E1, Canada
| | - Prishila Ponien
- Institut de Chimie des Substances Naturelles, CNRS UPR2301, Université Paris-Saclay, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Fréderique Verdier
- INSERM Unit 1016, Institut Cochin, Bâtiment Gustave Roussy, 27 rue du faubourg Saint-Jacques, 75014 Paris, France
| | - Bruno Canard
- Architecture et Fonction des Macromolécules Biologiques (AFMB) UMR 7257 CNRS/AMU, 163 Avenue de Luminy, 13288 Marseille Cedex 9, France
| | - Sergio Goncalves
- Eukarÿs SAS, Génopole Campus 3, 4 rue Pierre Fontaine, 91058 Evry Cedex, France
| | - Stéphane Chiron
- Eukarÿs SAS, Génopole Campus 3, 4 rue Pierre Fontaine, 91058 Evry Cedex, France
| | - Maude Le Gall
- Gastrointestinal and Metabolic Dysfunctions in Nutritional Pathologies, INSERM UMRS1149, 16 rue Henri Huchard, 75890 Paris Cedex 18, France
| | - Patrick Mayeux
- INSERM Unit 1016, Institut Cochin, Bâtiment Gustave Roussy, 27 rue du faubourg Saint-Jacques, 75014 Paris, France
| | - Maya Shmulevitz
- Medical Microbiology and Immunology, University of Alberta, 6-142J Katz Group Centre for Pharmacy and Health Research, 114 Street NW, Edmonton, Alberta T6G 2E1, Canada
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25
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Samson C, Petitalot A, Celli F, Herrada I, Ropars V, Le Du MH, Nhiri N, Jacquet E, Arteni AA, Buendia B, Zinn-Justin S. Structural analysis of the ternary complex between lamin A/C, BAF and emerin identifies an interface disrupted in autosomal recessive progeroid diseases. Nucleic Acids Res 2019; 46:10460-10473. [PMID: 30137533 PMCID: PMC6212729 DOI: 10.1093/nar/gky736] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [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: 12/26/2017] [Accepted: 08/02/2018] [Indexed: 01/22/2023] Open
Abstract
Lamins are the main components of the nucleoskeleton. Whereas their 3D organization was recently described using cryoelectron tomography, no structural data highlights how they interact with their partners at the interface between the inner nuclear envelope and chromatin. A large number of mutations causing rare genetic disorders called laminopathies were identified in the C-terminal globular Igfold domain of lamins A and C. We here present a first structural description of the interaction between the lamin A/C immunoglobulin-like domain and emerin, a nuclear envelope protein. We reveal that this lamin A/C domain both directly binds self-assembled emerin and interacts with monomeric emerin LEM domain through the dimeric chromatin-associated Barrier-to-Autointegration Factor (BAF) protein. Mutations causing autosomal recessive progeroid syndromes specifically impair proper binding of lamin A/C domain to BAF, thus destabilizing the link between lamin A/C and BAF in cells. Recent data revealed that, during nuclear assembly, BAF’s ability to bridge distant DNA sites is essential for guiding membranes to form a single nucleus around the mitotic chromosome ensemble. Our results suggest that BAF interaction with lamin A/C also plays an essential role, and that mutations associated with progeroid syndromes leads to a dysregulation of BAF-mediated chromatin organization and gene expression.
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Affiliation(s)
- Camille Samson
- Institut de Biologie Intégrative de la Cellule (I2BC), CEA, CNRS, Université Paris Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Ambre Petitalot
- Institut de Biologie Intégrative de la Cellule (I2BC), CEA, CNRS, Université Paris Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Florian Celli
- Institut de Biologie Intégrative de la Cellule (I2BC), CEA, CNRS, Université Paris Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Isaline Herrada
- Institut de Biologie Intégrative de la Cellule (I2BC), CEA, CNRS, Université Paris Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Virginie Ropars
- Institut de Biologie Intégrative de la Cellule (I2BC), CEA, CNRS, Université Paris Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Marie-Hélène Le Du
- Institut de Biologie Intégrative de la Cellule (I2BC), CEA, CNRS, Université Paris Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Naïma Nhiri
- Institut de Chimie des Substances Naturelles, Université Paris Sud, Université Paris-Saclay, CNRS UPR 2301, Gif-sur-Yvette, France
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, Université Paris Sud, Université Paris-Saclay, CNRS UPR 2301, Gif-sur-Yvette, France
| | - Ana-Andrea Arteni
- Institut de Biologie Intégrative de la Cellule (I2BC), CEA, CNRS, Université Paris Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Brigitte Buendia
- Unité de Biologie Fonctionnelle et Adaptative (BFA), CNRS UMR 8251, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Sophie Zinn-Justin
- Institut de Biologie Intégrative de la Cellule (I2BC), CEA, CNRS, Université Paris Sud, Université Paris-Saclay, Gif-sur-Yvette, France
- To whom correspondence should be addressed. Tel: +33 169083026;
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26
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Molina CE, Jacquet E, Ponien P, Muñoz-Guijosa C, Baczkó I, Maier LS, Donzeau-Gouge P, Dobrev D, Fischmeister R, Garnier A. Identification of optimal reference genes for transcriptomic analyses in normal and diseased human heart. Cardiovasc Res 2019; 114:247-258. [PMID: 29036603 DOI: 10.1093/cvr/cvx182] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 09/20/2017] [Indexed: 11/13/2022] Open
Abstract
Aims Quantitative real-time RT-PCR (RT-qPCR) has become the method of choice for mRNA quantification, but requires an accurate normalization based on the use of reference genes showing invariant expression across various pathological conditions. Only few data exist on appropriate reference genes for the human heart. The objective of this study was to determine a set of suitable reference genes in human atrial and ventricular tissues, from right and left cavities in control and in cardiac diseases. Methods and results We assessed the expression of 16 reference genes (ACTB, B2M, GAPDH, GUSB, HMBS, HPRT1, IPO8, PGK1, POLR2A, PPIA, RPLP0, TBP, TFRC, UBC, YWHAZ, 18S) in tissues from: right and left ventricles from healthy controls and heart failure (HF) patients; right-atrial tissue from patients in sinus rhythm with (SRd) or without (SRnd) atrial dilatation, patients with paroxysmal (pAF) or chronic (cAF) atrial fibrillation or with HF; and left-atrial tissue from patients in SR or cAF. Consensual analysis (by geNorm and Normfinder algorithms, BestKeeper software tool and comparative delta-Ct method) of the variability scores obtained for each reference gene expression shows that the most stably expressed genes are: GAPDH, GUSB, IPO8, POLR2A, and YWHAZ when comparing either right and left ventricle or ventricle from healthy controls and HF patients; GAPDH, IPO8, POLR2A, PPIA, and RPLP0 when comparing either right and left atrium or right atria from all pathological groups. ACTB, TBP, TFRC, and 18S genes were identified as the least stable. Conclusions The overall most stable reference genes across different heart cavities and disease conditions were GAPDH, IPO8, POLR2A and PPIA. YWHAZ or GUSB could be added to this set for some specific experiments. This study should provide useful guidelines for reference gene selection in RT-qPCR studies in human heart.
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Affiliation(s)
- Cristina E Molina
- Inserm, UMR-S 1180, University of Paris-Sud, Université Paris-Saclay, Châtenay-Malabry, France.,Institute of Pharmacology and Toxicology, Heart Research Center Göttingen, University Medical Center, Georg-August University Göttingen, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site Göttingen, Germany
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, UPR 2301, CNRS, University of Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Prishila Ponien
- Institut de Chimie des Substances Naturelles, UPR 2301, CNRS, University of Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | | | - Istvan Baczkó
- Department Pharmacology and Pharmacotherapy, University of Szeged, Hungary
| | - Lars S Maier
- Department Internal Medicine II, University Heart Center, University Hospital Regensburg, Regensburg, Germany
| | | | - Dobromir Dobrev
- West German Heart and Vascular Center, Institute of Pharmacology, University Duisburg-Essen, Essen, Germany
| | - Rodolphe Fischmeister
- Inserm, UMR-S 1180, University of Paris-Sud, Université Paris-Saclay, Châtenay-Malabry, France
| | - Anne Garnier
- Inserm, UMR-S 1180, University of Paris-Sud, Université Paris-Saclay, Châtenay-Malabry, France
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Zanuttini D, Vurpillot F, Douady J, Jacquet E, Anglade PM, Gervais B. Dissociation of GaN 2+ and AlN 2+ in APT: Electronic structure and stability in strong DC field. J Chem Phys 2018; 149:134310. [PMID: 30292191 DOI: 10.1063/1.5036933] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
We investigate from a theoretical point of view the stability of AlN2+ and GaN2+ dications produced under high static electric fields like those reached in Atom Probe Tomography (APT) experiments. By means of quantum chemical calculations of the electronic structure of these molecules, we show that their stability is governed by two independent processes. On the one hand, the spin-orbit coupling allows some molecular excited states to dissociate by inter-system crossing. On the other hand, the action of the electric field lowers the potential energy barrier, which ensures the dication stability in standard conditions. We present a detailed example of field emission dynamics in the specific case of the 11Δ states for a parabolic tip, which captures the essentials of the process by means of a simplified model. We show that the dissociation dynamics of AlN2+ and GaN2+ is completely different despite the strong resemblance of their electronic structure.
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Affiliation(s)
- D Zanuttini
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - F Vurpillot
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - J Douady
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
| | - E Jacquet
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
| | - P-M Anglade
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
| | - B Gervais
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
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Zanuttini D, Blum I, di Russo E, Rigutti L, Vurpillot F, Douady J, Jacquet E, Anglade PM, Gervais B. Dissociation of GaN 2+ and AlN 2+ in APT: Analysis of experimental measurements. J Chem Phys 2018; 149:134311. [PMID: 30292204 DOI: 10.1063/1.5037010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The use of a tip-shaped sample for the atom probe tomography technique offers the unique opportunity to analyze the dynamics of molecular ions in strong DC fields. We investigate here the stability of AlN2+ and GaN2+ dications emitted from an Al0.25Ga0.75N sample in a joint theoretical and experimental study. Despite the strong chemical resemblance of these two molecules, we observe only stable AlN2+, while GaN2+ can only be observed as a transient species. We simulate the emission dynamics of these ions on field-perturbed potential energy surfaces obtained from quantum chemical calculations. We show that the dissociation is governed by two independent processes. For all bound states, a mechanical dissociation is induced by the distortion of the potential energy surface in the close vicinity of the emitting tip. In the specific case of GaN2+, the relatively small electric dipole of the dication in its ground 13Σ- and excited 11Δ states induces a weak coupling with the electric field so that the mechanical dissociation into Ga+ + N+ lasts for sufficient time to be observed. By contrast, the AlN2+ mechanical dissociation leads to Al2+ + N which cannot be observed as a correlated event. For some deeply bound singlet excited states, the spin-orbit coupling with lower energy triplet states gives another chance of dissociation by system inter-system crossing with specific patterns observed experimentally in a correlated time of flight map.
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Affiliation(s)
- D Zanuttini
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - I Blum
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - E di Russo
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - L Rigutti
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - F Vurpillot
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - J Douady
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
| | - E Jacquet
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
| | - P-M Anglade
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
| | - B Gervais
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
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29
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Rochat T, Bohn C, Morvan C, Le Lam T, Razvi F, Pain A, Toffano-Nioche C, Ponien P, Jacq A, Jacquet E, Fey PD, Gautheret D, Bouloc P. The conserved regulatory RNA RsaE down-regulates the arginine degradation pathway in Staphylococcus aureus. Nucleic Acids Res 2018; 46:8803-8816. [PMID: 29986060 PMCID: PMC6158497 DOI: 10.1093/nar/gky584] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Revised: 05/28/2018] [Accepted: 06/29/2018] [Indexed: 01/31/2023] Open
Abstract
RsaE is a regulatory RNA highly conserved amongst Firmicutes that lowers the amount of mRNAs associated with the TCA cycle and folate metabolism. A search for new RsaE targets in Staphylococcus aureus revealed that in addition to previously described substrates, RsaE down-regulates several genes associated with arginine catabolism. In particular, RsaE targets the arginase rocF mRNA via direct interactions involving G-rich motifs. Two duplicated C-rich motifs of RsaE can independently downregulate rocF expression. The faster growth rate of ΔrsaE compared to its parental strain in media containing amino acids as sole carbon source points to an underlying role for RsaE in amino acid catabolism. Collectively, the data support a model in which RsaE acts as a global regulator of functions associated with metabolic adaptation.
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Affiliation(s)
- Tatiana Rochat
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91190 Gif sur Yvette, France
- VIM, INRA, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Chantal Bohn
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91190 Gif sur Yvette, France
| | - Claire Morvan
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91190 Gif sur Yvette, France
| | - Thao Nguyen Le Lam
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91190 Gif sur Yvette, France
| | - Fareha Razvi
- University of Nebraska Medical Center, Department of Pathology and Microbiology, Omaha, NE, USA
| | - Adrien Pain
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91190 Gif sur Yvette, France
| | - Claire Toffano-Nioche
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91190 Gif sur Yvette, France
| | - Prishila Ponien
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 91190 Gif sur Yvette, France
| | - Annick Jacq
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91190 Gif sur Yvette, France
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 91190 Gif sur Yvette, France
| | - Paul D Fey
- University of Nebraska Medical Center, Department of Pathology and Microbiology, Omaha, NE, USA
| | - Daniel Gautheret
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91190 Gif sur Yvette, France
| | - Philippe Bouloc
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91190 Gif sur Yvette, France
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Petitalot A, Dardillac E, Jacquet E, Nhiri N, Guirouilh-Barbat J, Julien P, Bouazzaoui I, Bonte D, Feunteun J, Schnell JA, Lafitte P, Aude JC, Noguès C, Rouleau E, Lidereau R, Lopez BS, Zinn-Justin S, Caputo SM. Combining Homologous Recombination and Phosphopeptide-binding Data to Predict the Impact of BRCA1 BRCT Variants on Cancer Risk. Mol Cancer Res 2018; 17:54-69. [PMID: 30257991 DOI: 10.1158/1541-7786.mcr-17-0357] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 02/07/2018] [Accepted: 09/11/2018] [Indexed: 11/16/2022]
Abstract
BRCA1 mutations have been identified that increase the risk of developing hereditary breast and ovarian cancers. Genetic screening is now offered to patients with a family history of cancer, to adapt their treatment and the management of their relatives. However, a large number of BRCA1 variants of uncertain significance (VUS) are detected. To better understand the significance of these variants, a high-throughput structural and functional analysis was performed on a large set of BRCA1 VUS. Information on both cellular localization and homology-directed DNA repair (HR) capacity was obtained for 78 BRCT missense variants in the UMD-BRCA1 database and measurement of the structural stability and phosphopeptide-binding capacities was performed for 42 mutated BRCT domains. This extensive and systematic analysis revealed that most characterized causal variants affect BRCT-domain solubility in bacteria and all impair BRCA1 HR activity in cells. Furthermore, binding to a set of 5 different phosphopeptides was tested: all causal variants showed phosphopeptide-binding defects and no neutral variant showed such defects. A classification is presented on the basis of mutated BRCT domain solubility, phosphopeptide-binding properties, and VUS HR capacity. These data suggest that HR-defective variants, which present, in addition, BRCT domains either insoluble in bacteria or defective for phosphopeptide binding, lead to an increased cancer risk. Furthermore, the data suggest that variants with a WT HR activity and whose BRCT domains bind with a WT affinity to the 5 phosphopeptides are neutral. The case of variants with WT HR activity and defective phosphopeptide binding should be further characterized, as this last functional defect might be sufficient per se to lead to tumorigenesis. IMPLICATIONS: The analysis of the current study on BRCA1 structural and functional defects on cancer risk and classification presented may improve clinical interpretation and therapeutic selection.
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Affiliation(s)
- Ambre Petitalot
- Service de Génétique, Département de Biologie des Tumeurs, Institut Curie, Paris, France.,Institut de Biologie Intégrative de la Cellule, CEA, CNRS, Université Paris Sud, UMR 9198, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Elodie Dardillac
- Institut Gustave Roussy, CNRS UMR 8200, Université Paris-Saclay, Villejuif, France.,Team labeled "Ligue 2014," Villejuif, France
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Naima Nhiri
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Josée Guirouilh-Barbat
- Institut Gustave Roussy, CNRS UMR 8200, Université Paris-Saclay, Villejuif, France.,Team labeled "Ligue 2014," Villejuif, France
| | - Patrick Julien
- Service de Génétique, Département de Biologie des Tumeurs, Institut Curie, Paris, France
| | - Isslam Bouazzaoui
- Institut de Biologie Intégrative de la Cellule, CEA, CNRS, Université Paris Sud, UMR 9198, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Dorine Bonte
- Institut Gustave Roussy, CNRS UMR 8200, Université Paris-Saclay, Villejuif, France
| | - Jean Feunteun
- Institut Gustave Roussy, CNRS UMR 8200, Université Paris-Saclay, Villejuif, France
| | - Jeff A Schnell
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Philippe Lafitte
- Service de Génétique, Département de Biologie des Tumeurs, Institut Curie, Paris, France
| | - Jean-Christophe Aude
- Institut de Biologie Intégrative de la Cellule, CEA, CNRS, Université Paris Sud, UMR 9198, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Catherine Noguès
- Service de Génétique, Département de Biologie des Tumeurs, Institut Curie, Paris, France
| | - Etienne Rouleau
- Service de Génétique, Département de Biologie des Tumeurs, Institut Curie, Paris, France
| | - Rosette Lidereau
- Service de Génétique, Département de Biologie des Tumeurs, Institut Curie, Paris, France
| | - Bernard S Lopez
- Institut Gustave Roussy, CNRS UMR 8200, Université Paris-Saclay, Villejuif, France.,Team labeled "Ligue 2014," Villejuif, France
| | - Sophie Zinn-Justin
- Institut de Biologie Intégrative de la Cellule, CEA, CNRS, Université Paris Sud, UMR 9198, Université Paris-Saclay, Gif-sur-Yvette, France.
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Gicquel M, Gomez C, Garcia Alvarez MC, Pamlard O, Guérineau V, Jacquet E, Bignon J, Voituriez A, Marinetti A. Inhibition of p53-Murine Double Minute 2 (MDM2) Interactions with 3,3′-Spirocyclopentene Oxindole Derivatives. J Med Chem 2018; 61:9386-9392. [DOI: 10.1021/acs.jmedchem.8b01137] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Maxime Gicquel
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Catherine Gomez
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Maria Concepcion Garcia Alvarez
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Olivier Pamlard
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Vincent Guérineau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Jérôme Bignon
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Arnaud Voituriez
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Angela Marinetti
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
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32
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Soumah L, Beaulieu N, Qassym L, Carrétéro C, Jacquet E, Lebourgeois R, Ben Youssef J, Bortolotti P, Cros V, Anane A. Ultra-low damping insulating magnetic thin films get perpendicular. Nat Commun 2018; 9:3355. [PMID: 30135521 PMCID: PMC6105659 DOI: 10.1038/s41467-018-05732-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 06/19/2018] [Indexed: 11/14/2022] Open
Abstract
A magnetic material combining low losses and large perpendicular magnetic anisotropy (PMA) is still a missing brick in the magnonic and spintronic fields. We report here on the growth of ultrathin Bismuth doped Y3Fe5O12 (BiYIG) films on Gd3Ga5O12 (GGG) and substituted GGG (sGGG) (111) oriented substrates. A fine tuning of the PMA is obtained using both epitaxial strain and growth-induced anisotropies. Both spontaneously in-plane and out-of-plane magnetized thin films can be elaborated. Ferromagnetic Resonance (FMR) measurements demonstrate the high-dynamic quality of these BiYIG ultrathin films; PMA films with Gilbert damping values as low as 3 × 10-4 and FMR linewidth of 0.3 mT at 8 GHz are achieved even for films that do not exceed 30 nm in thickness. Moreover, we measure inverse spin hall effect (ISHE) on Pt/BiYIG stacks showing that the magnetic insulator's surface is transparent to spin current, making it appealing for spintronic applications.
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Affiliation(s)
- Lucile Soumah
- Unité Mixte de Physique CNRS, Thales, Univ. Paris-Sud, Université Paris Saclay, 91767, Palaiseau, France
| | - Nathan Beaulieu
- LABSTICC, UMR 6285 CNRS, Université de Bretagne Occidentale, 29238, Brest, France
| | - Lilia Qassym
- Thales Research and Technology, Thales, 91767, Palaiseau, France
| | - Cécile Carrétéro
- Unité Mixte de Physique CNRS, Thales, Univ. Paris-Sud, Université Paris Saclay, 91767, Palaiseau, France
| | - Eric Jacquet
- Unité Mixte de Physique CNRS, Thales, Univ. Paris-Sud, Université Paris Saclay, 91767, Palaiseau, France
| | | | - Jamal Ben Youssef
- LABSTICC, UMR 6285 CNRS, Université de Bretagne Occidentale, 29238, Brest, France
| | - Paolo Bortolotti
- Unité Mixte de Physique CNRS, Thales, Univ. Paris-Sud, Université Paris Saclay, 91767, Palaiseau, France
| | - Vincent Cros
- Unité Mixte de Physique CNRS, Thales, Univ. Paris-Sud, Université Paris Saclay, 91767, Palaiseau, France
| | - Abdelmadjid Anane
- Unité Mixte de Physique CNRS, Thales, Univ. Paris-Sud, Université Paris Saclay, 91767, Palaiseau, France.
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Arnedos M, Rusquec P, Morelle M, Lebreton C, Jacquet E, Emile G, Aires J, Debled M, Frenel JS, Augereau P, Cheaib B, Levy C, Bachelot T. Abstract P5-21-11: Benefit from palbociclib and fulvestrant based on previous fulvestrant and/or everolimus treatment. Based on a cohort of over 200 patients treated in a French compassionate program. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p5-21-11] [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: CDK4/6 inhibitors have been approved in the recent years for the treatment of advanced hormone receptor-positive breast cancer. For patients with resistance to previous endocrine therapy, the approval is based on the results of the PALOMA-3 trial testing palbociclib in addition to fulvestrant observing a progression-free survival (PFS) of 9.2 months. Nevertheless, in this study no previous treatment with fulvestrant was allowed and no information had been reported of efficacy after everolimus administration.
Patients and methods: We collected information from patients treated with palbociclib + fulvestrant in the context of a French compassionate access. We aimed at determining the benefit of this treatment in a real population to provide information about PFS in non-selected patients as well as efficacy of palbociclib and fulvestrant in patients previously treated with fulvestrant and/or everolimus. Median PFS were assessed by Kaplan-Meier survival analysis and compared with log-rank test.
Results: 206 patients were identified from 5 institutions. Mean age at treatment was 61 years (range 28 – 85). 55% presented with visceral disease. Lines at where palbociclib + fulvestrant treatment was administered were as follows: 1% 1st line, 8.3% 2nd line, 19.4% 3rd line, 13.6% 4th line, 10.2% 5th lignes and the remaining 47.6% had received ≥6 lines (median: 5 lines, range 1 to 15).
A total of 48% patients had previously been treated with fulvestrant. In a subsample of patient where the information was available (n=146), 67.8% patients had received everolimus in combination with endocrine therapy before palbociclib administration.
A total of 77 patients were still on treatment. Median PFS on fulvestrant-palbociclib treatment at the date of data cut-off was of 5.46 months (95% CI; 4.6 to 6.6 months). In a univariate analysis, there were no significant differences in median PFS for patients treated or not with previous fulvestrant, suggesting a potential effect of palbociclib to recover sensitivity to fulvestrant (4.7 months for previous fulvestrant treatment [95% CI 4.07 - 6.3 months] vs 6.1 months for no previous fulvestrant [95% CI; 6.3 - 8.02 months], p=0.3559).
Similarly, in the subsample of n=146 patients where information about previous everolimus treatment was available at data cut-off, benefit from palbociclib-fulvestrant was not affected by previous everolimus treatment (median PFS 4.8 months for previously treated [95% CI; 4.01 -7.8 months] vs 5.4 months for the untreated everolimus group [95% CI; 4.07 - 9.59 months], p=0.374).
Conclusions: Fulvestrant-palbociclib in the real life is associated with a median PFS of 5.5 months, which is below the results provided in the PALOMA-3 trial, reflecting a much more advanced population. Importantly, neither previous everolimus treatment nor fulvestrant therapy affected benefit from fulvestrant-palbociclib in this population in univariate analyses suggesting a potential recovery of fulvestrant sensitivity with CDK4/6 inhibition. Results from multivariate analyses and more detailed information about patients' characteristics and benefit from previous therapies will be provided.
Citation Format: Arnedos M, Rusquec P, Morelle M, Lebreton C, Jacquet E, Emile G, Aires J, Debled M, Frenel J-S, Augereau P, Cheaib B, Levy C, Bachelot T. Benefit from palbociclib and fulvestrant based on previous fulvestrant and/or everolimus treatment. Based on a cohort of over 200 patients treated in a French compassionate program [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P5-21-11.
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Affiliation(s)
- M Arnedos
- Gustave Roussy Cancer Campus, Villejuif, France; Institut Cancerologie Ouest, Nantes, France; Centre Leon Bedard, Lyon, France; Institut Bergonie, Bordeaux, France; Centre François Baclesse, Caen, France; Hospital San Pedro de Alcántara, Caceres, Spain; Institut Cancerologie Ouest, Angers, France
| | - P Rusquec
- Gustave Roussy Cancer Campus, Villejuif, France; Institut Cancerologie Ouest, Nantes, France; Centre Leon Bedard, Lyon, France; Institut Bergonie, Bordeaux, France; Centre François Baclesse, Caen, France; Hospital San Pedro de Alcántara, Caceres, Spain; Institut Cancerologie Ouest, Angers, France
| | - M Morelle
- Gustave Roussy Cancer Campus, Villejuif, France; Institut Cancerologie Ouest, Nantes, France; Centre Leon Bedard, Lyon, France; Institut Bergonie, Bordeaux, France; Centre François Baclesse, Caen, France; Hospital San Pedro de Alcántara, Caceres, Spain; Institut Cancerologie Ouest, Angers, France
| | - C Lebreton
- Gustave Roussy Cancer Campus, Villejuif, France; Institut Cancerologie Ouest, Nantes, France; Centre Leon Bedard, Lyon, France; Institut Bergonie, Bordeaux, France; Centre François Baclesse, Caen, France; Hospital San Pedro de Alcántara, Caceres, Spain; Institut Cancerologie Ouest, Angers, France
| | - E Jacquet
- Gustave Roussy Cancer Campus, Villejuif, France; Institut Cancerologie Ouest, Nantes, France; Centre Leon Bedard, Lyon, France; Institut Bergonie, Bordeaux, France; Centre François Baclesse, Caen, France; Hospital San Pedro de Alcántara, Caceres, Spain; Institut Cancerologie Ouest, Angers, France
| | - G Emile
- Gustave Roussy Cancer Campus, Villejuif, France; Institut Cancerologie Ouest, Nantes, France; Centre Leon Bedard, Lyon, France; Institut Bergonie, Bordeaux, France; Centre François Baclesse, Caen, France; Hospital San Pedro de Alcántara, Caceres, Spain; Institut Cancerologie Ouest, Angers, France
| | - J Aires
- Gustave Roussy Cancer Campus, Villejuif, France; Institut Cancerologie Ouest, Nantes, France; Centre Leon Bedard, Lyon, France; Institut Bergonie, Bordeaux, France; Centre François Baclesse, Caen, France; Hospital San Pedro de Alcántara, Caceres, Spain; Institut Cancerologie Ouest, Angers, France
| | - M Debled
- Gustave Roussy Cancer Campus, Villejuif, France; Institut Cancerologie Ouest, Nantes, France; Centre Leon Bedard, Lyon, France; Institut Bergonie, Bordeaux, France; Centre François Baclesse, Caen, France; Hospital San Pedro de Alcántara, Caceres, Spain; Institut Cancerologie Ouest, Angers, France
| | - J-S Frenel
- Gustave Roussy Cancer Campus, Villejuif, France; Institut Cancerologie Ouest, Nantes, France; Centre Leon Bedard, Lyon, France; Institut Bergonie, Bordeaux, France; Centre François Baclesse, Caen, France; Hospital San Pedro de Alcántara, Caceres, Spain; Institut Cancerologie Ouest, Angers, France
| | - P Augereau
- Gustave Roussy Cancer Campus, Villejuif, France; Institut Cancerologie Ouest, Nantes, France; Centre Leon Bedard, Lyon, France; Institut Bergonie, Bordeaux, France; Centre François Baclesse, Caen, France; Hospital San Pedro de Alcántara, Caceres, Spain; Institut Cancerologie Ouest, Angers, France
| | - B Cheaib
- Gustave Roussy Cancer Campus, Villejuif, France; Institut Cancerologie Ouest, Nantes, France; Centre Leon Bedard, Lyon, France; Institut Bergonie, Bordeaux, France; Centre François Baclesse, Caen, France; Hospital San Pedro de Alcántara, Caceres, Spain; Institut Cancerologie Ouest, Angers, France
| | - C Levy
- Gustave Roussy Cancer Campus, Villejuif, France; Institut Cancerologie Ouest, Nantes, France; Centre Leon Bedard, Lyon, France; Institut Bergonie, Bordeaux, France; Centre François Baclesse, Caen, France; Hospital San Pedro de Alcántara, Caceres, Spain; Institut Cancerologie Ouest, Angers, France
| | - T Bachelot
- Gustave Roussy Cancer Campus, Villejuif, France; Institut Cancerologie Ouest, Nantes, France; Centre Leon Bedard, Lyon, France; Institut Bergonie, Bordeaux, France; Centre François Baclesse, Caen, France; Hospital San Pedro de Alcántara, Caceres, Spain; Institut Cancerologie Ouest, Angers, France
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Vaz DC, Lesne E, Sander A, Naganuma H, Jacquet E, Santamaria J, Barthélémy A, Bibes M. Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures. J Vis Exp 2018. [PMID: 29553560 DOI: 10.3791/56951] [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: 10/31/2022] Open
Abstract
The quasi 2D electron system (q2DES) that forms at the interface between LaAlO3 (LAO) and SrTiO3 (STO) has attracted much attention from the oxide electronics community. One of its hallmark features is the existence of a critical LAO thickness of 4 unit-cells (uc) for interfacial conductivity to emerge. Although electrostatic mechanisms have been proposed in the past to describe the existence of this critical thickness, the importance of chemical defects has been recently accentuated. Here, we describe the growth of metal/LAO/STO heterostructures in an ultra-high vacuum (UHV) cluster system combining pulsed laser deposition (to grow the LAO), magnetron sputtering (to grow the metal) and X-ray photoelectron spectroscopy (XPS). We study step by step the formation and evolution of the q2DES and the chemical interactions that occur between the metal and the LAO/STO. Additionally, magnetotransport experiments elucidate on the transport and electronic properties of the q2DES. This systematic work not only demonstrates a way to study the electrostatic and chemical interplay between the q2DES and its environment, but also unlocks the possibility to couple multifunctional capping layers with the rich physics observed in two-dimensional electron systems, allowing the fabrication of new types of devices.
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Affiliation(s)
| | - Edouard Lesne
- Unité Mixte de Physique CNRS/Thales, Université Paris-Saclay; Max Planck Institut für Mikrostrukturphysik
| | - Anke Sander
- Unité Mixte de Physique CNRS/Thales, Université Paris-Saclay
| | - Hiroshi Naganuma
- Unité Mixte de Physique CNRS/Thales, Université Paris-Saclay; Department of Applied Physics, Tohoku University
| | - Eric Jacquet
- Unité Mixte de Physique CNRS/Thales, Université Paris-Saclay
| | - Jacobo Santamaria
- Unité Mixte de Physique CNRS/Thales, Université Paris-Saclay; Instituto de Magnetismo Aplicado, Universidad Complutense de Madrid
| | | | - Manuel Bibes
- Unité Mixte de Physique CNRS/Thales, Université Paris-Saclay
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Grzela R, Nusbaum J, Fieulaine S, Lavecchia F, Desmadril M, Nhiri N, Van Dorsselaer A, Cianferani S, Jacquet E, Meinnel T, Giglione C. Peptide deformylases from Vibrio parahaemolyticus phage and bacteria display similar deformylase activity and inhibitor binding clefts. Biochim Biophys Acta Proteins Proteom 2017; 1866:348-355. [PMID: 29101077 DOI: 10.1016/j.bbapap.2017.10.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 10/17/2017] [Accepted: 10/21/2017] [Indexed: 01/06/2023]
Abstract
Unexpected peptide deformylase (PDF) genes were recently retrieved in numerous marine phage genomes. While various hypotheses dealing with the occurrence of these intriguing sequences have been made, no further characterization and functional studies have been described thus far. In this study, we characterize the bacteriophage Vp16 PDF enzyme, as representative member of the newly identified C-terminally truncated viral PDFs. We show here that conditions classically used for bacterial PDFs lead to an enzyme exhibiting weak activity. Nonetheless, our integrated biophysical and biochemical approaches reveal specific effects of pH and metals on Vp16 PDF stability and activity. A novel purification protocol taking in account these data allowed strong improvement of Vp16 PDF specific activity to values similar to those of bacterial PDFs. We next show that Vp16 PDF is as sensitive to the natural inhibitor compound of PDFs, actinonin, as bacterial PDFs. Comparison of the 3D structures of Vp16 and E. coli PDFs bound to actinonin also reveals that both PDFs display identical substrate binding mode. We conclude that bacteriophage Vp16 PDF protein has functional peptide deformylase activity and we suggest that encoded phage PDFs might be important for viral fitness.
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Affiliation(s)
- Renata Grzela
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
| | - Julien Nusbaum
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
| | - Sonia Fieulaine
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
| | - Francesco Lavecchia
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
| | - Michel Desmadril
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
| | - Naima Nhiri
- Institut de Chimie des Substances Naturelles, UPR2301, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
| | - Alain Van Dorsselaer
- Laboratoire de Spectrométrie de Masse BioOrganique, Université de Strasbourg, CNRS, IPHC UMR 7178, 67000 Strasbourg, France
| | - Sarah Cianferani
- Laboratoire de Spectrométrie de Masse BioOrganique, Université de Strasbourg, CNRS, IPHC UMR 7178, 67000 Strasbourg, France
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, UPR2301, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
| | - Thierry Meinnel
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France.
| | - Carmela Giglione
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France.
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36
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Zanuttini D, Blum I, Rigutti L, Vurpillot F, Douady J, Jacquet E, Anglade PM, Gervais B. Electronic structure and stability of the SiO 2+ dications produced in tomographic atom probe experiments. J Chem Phys 2017. [PMID: 29096513 DOI: 10.1103/physreva.95.061401] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
Abstract
The molecular electronic states of the SiO2+ dication have been investigated in a joint theoretical and experimental analysis. The use of a tip-shaped sample for tomographic atom probe analysis offers the unique opportunity to produce and to analyze the lifetime of some excited states of this dication. The perturbation brought by the large electric field of the polarized tip along the ion trajectory is analyzed by means of molecular dynamics simulation. For the typical electric fields used in the experiment, the lowest energy triplet states spontaneously dissociate, while the lowest energy singlet states do not. We show that the emission process leads to the formation of some excited singlet state, which dissociates by means of spin-orbit coupling with lower-energy triplet states to produce specific patterns associated with Si+ + O+ and Si2+ + O dissociation channels. These patterns are recorded and observed experimentally in a correlated time-of-flight map.
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Affiliation(s)
- D Zanuttini
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - I Blum
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - L Rigutti
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - F Vurpillot
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - J Douady
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
| | - E Jacquet
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
| | - P-M Anglade
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
| | - B Gervais
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
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Zanuttini D, Blum I, Rigutti L, Vurpillot F, Douady J, Jacquet E, Anglade PM, Gervais B. Electronic structure and stability of the SiO2+ dications produced in tomographic atom probe experiments. J Chem Phys 2017; 147:164301. [DOI: 10.1063/1.5001113] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- D. Zanuttini
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
| | - I. Blum
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - L. Rigutti
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - F. Vurpillot
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - J. Douady
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
| | - E. Jacquet
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
| | - P.-M. Anglade
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
| | - B. Gervais
- Normandie Université, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, UMR 6252, BP 5133, F-14070 Caen Cedex 05, France
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Jacquet E, Lardy-Cleaud A, Pistilli B, Cottu P, Delaloge S, Debled M, Vanlemmens L, Anne-Valérie G, Leheurteur M, Laborde L, Jacot W, Berchery D, Coudert B, Ferrero JM, Parent D, Diéras V, Velten M, Courtinard C, Robain M, Bachelot T. Survival of patients with aromatase inhibitors sensitive, HR+/HER2- metastatic breast cancer treated with a first-line endocrine therapy or chemotherapy in a multicenter national observational study. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx365.028] [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: 11/15/2022] Open
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Pistilli B, Lardy-Cleaud A, Jacquet E, Delaloge S, Cottu P, Debled M, Vanlemmens L, Leheurteur M, Divanon F, Gonçalves A, Laurent C, Coudert B, Chamorey E, Campion L, Mouret-Reynier MA, Breton M, Petit T, Simon G, Cailliot C, Bachelot T. FICHE-YOUNG: FIrst-line treatment CHoicE in hormone receptor positive (HR+)/HER2- negative metastatic breast cancer patients (MBC) ≤45 years old. A large observational multicenter cohort survival analysis. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx365.043] [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: 11/14/2022] Open
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40
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Vaz DC, Lesne E, Sander A, Naganuma H, Jacquet E, Santamaria J, Barthélémy A, Bibes M. Tuning Up or Down the Critical Thickness in LaAlO 3 /SrTiO 3 through In Situ Deposition of Metal Overlayers. Adv Mater 2017; 29:1700486. [PMID: 28505388 DOI: 10.1002/adma.201700486] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 03/28/2017] [Indexed: 06/07/2023]
Abstract
The quasi 2D electron system (q2DES) that forms at the interface between LaAlO3 and SrTiO3 has attracted much attention from the oxide electronics community. One of its hallmark features is the existence of a critical LaAlO3 thickness of 4 unit-cells (uc) for interfacial conductivity to emerge. In this paper, the chemical, electronic, and transport properties of LaAlO3 /SrTiO3 samples capped with different metals grown in a system combining pulsed laser deposition, sputtering, and in situ X-ray photoemission spectroscopy are investigated. The results show that for metals with low work function a q2DES forms at 1-2 uc of LaAlO3 and is accompanied by a partial oxidation of the metal, a phenomenon that affects the q2DES properties and triggers the formation of defects. In contrast, for noble metals, the critical thickness is increased above 4 uc. The results are discussed in terms of a hybrid mechanism that incorporates electrostatic and chemical effects.
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Affiliation(s)
- Diogo Castro Vaz
- Unité Mixte de Physique UMR 137 CNRS/Thales, Université Paris-Sud, Université Paris-Saclay, 91767, Palaiseau, France
| | - Edouard Lesne
- Unité Mixte de Physique UMR 137 CNRS/Thales, Université Paris-Sud, Université Paris-Saclay, 91767, Palaiseau, France
| | - Anke Sander
- Unité Mixte de Physique UMR 137 CNRS/Thales, Université Paris-Sud, Université Paris-Saclay, 91767, Palaiseau, France
| | - Hiroshi Naganuma
- Unité Mixte de Physique UMR 137 CNRS/Thales, Université Paris-Sud, Université Paris-Saclay, 91767, Palaiseau, France
- Department of Applied Physics, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Eric Jacquet
- Unité Mixte de Physique UMR 137 CNRS/Thales, Université Paris-Sud, Université Paris-Saclay, 91767, Palaiseau, France
| | - Jacobo Santamaria
- Unité Mixte de Physique UMR 137 CNRS/Thales, Université Paris-Sud, Université Paris-Saclay, 91767, Palaiseau, France
- Instituto de Magnetismo Aplicado, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Agnès Barthélémy
- Unité Mixte de Physique UMR 137 CNRS/Thales, Université Paris-Sud, Université Paris-Saclay, 91767, Palaiseau, France
| | - Manuel Bibes
- Unité Mixte de Physique UMR 137 CNRS/Thales, Université Paris-Sud, Université Paris-Saclay, 91767, Palaiseau, France
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41
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Jacquet E, Chambert J, Pauchot J, Sandoz P. Intra- and inter-individual variability in the mechanical properties of the human skin from in vivo measurements on 20 volunteers. Skin Res Technol 2017; 23:491-499. [PMID: 28370413 DOI: 10.1111/srt.12361] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND/PURPOSE The mechanical properties and behavior of the human skin in vivo are of medical importance, particularly to surgeons who have to consider the skin extension capabilities in the preparation of surgical acts. Variable data can be found in literature that result from diverse kinds of tests (in vivo, ex vivo, and postmortem) performed with different instruments. METHODS This paper presents the results of in vivo measurements performed on a cohort of 20 healthy volunteers with an ultralight homemade uniaxial extensometer. Different anatomical zones were explored under different directions of solicitation in order to document inter- and intra-individual variability as well as skin anisotropy. RESULTS The experimental data obtained are fitted with a phenomenological exponential model allowing the identification of three parameters characteristic of the tested skin behavior. These parameters can be related to the concept of skin extensibility used by surgeons. CONCLUSION The inter- and intra-variability observed on that cohort confirms the need for a patient-specific approach based on the in vivo measurement of the mechanical behavior of the human skin of interest. Even the direction of higher skin stiffness is found to be individual-dependent. The capability of the extensometer used in this study to fulfill such measurement needs is also demonstrated.
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Affiliation(s)
- E Jacquet
- Department of Applied Mechanics, CNRS/UFC/ENSMM/UTBM, FEMTO-ST Institute, Univ. Bourgogne Franche-Comté, Besançon, France
| | - J Chambert
- Department of Applied Mechanics, CNRS/UFC/ENSMM/UTBM, FEMTO-ST Institute, Univ. Bourgogne Franche-Comté, Besançon, France
| | - J Pauchot
- Service de Chirurgie Orthopédique, Traumatologique et Plastique, CHRU J. Minjoz, Univ. Bourgogne Franche-Comté, Centre Hospitalier Régional Universitaire, Besançon, France
| | - P Sandoz
- Department of Applied Mechanics, CNRS/UFC/ENSMM/UTBM, FEMTO-ST Institute, Univ. Bourgogne Franche-Comté, Besançon, France
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42
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Jacquet E, Joly S, Chambert J, Rekik K, Sandoz P. Ultra-light extensometer for the assessment of the mechanical properties of the human skin in vivo. Skin Res Technol 2017; 23:531-538. [DOI: 10.1111/srt.12367] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/10/2017] [Indexed: 12/01/2022]
Affiliation(s)
- E. Jacquet
- CNRS/UFC/ENSMM/UTBM; FEMTO-ST Institute; Univ. Bourgogne Franche-Comté; Besançon France
| | - S. Joly
- CNRS/UFC/ENSMM/UTBM; FEMTO-ST Institute; Univ. Bourgogne Franche-Comté; Besançon France
| | - J. Chambert
- CNRS/UFC/ENSMM/UTBM; FEMTO-ST Institute; Univ. Bourgogne Franche-Comté; Besançon France
| | - K. Rekik
- CNRS/UFC/ENSMM/UTBM; FEMTO-ST Institute; Univ. Bourgogne Franche-Comté; Besançon France
| | - P. Sandoz
- CNRS/UFC/ENSMM/UTBM; FEMTO-ST Institute; Univ. Bourgogne Franche-Comté; Besançon France
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Vernhes E, Renouard M, Gilquin B, Cuniasse P, Durand D, England P, Hoos S, Huet A, Conway JF, Glukhov A, Ksenzenko V, Jacquet E, Nhiri N, Zinn-Justin S, Boulanger P. High affinity anchoring of the decoration protein pb10 onto the bacteriophage T5 capsid. Sci Rep 2017; 7:41662. [PMID: 28165000 PMCID: PMC5292684 DOI: 10.1038/srep41662] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [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: 11/21/2016] [Accepted: 12/20/2016] [Indexed: 12/14/2022] Open
Abstract
Bacteriophage capsids constitute icosahedral shells of exceptional stability that protect the viral genome. Many capsids display on their surface decoration proteins whose structure and function remain largely unknown. The decoration protein pb10 of phage T5 binds at the centre of the 120 hexamers formed by the major capsid protein. Here we determined the 3D structure of pb10 and investigated its capsid-binding properties using NMR, SAXS, cryoEM and SPR. Pb10 consists of an α-helical capsid-binding domain and an Ig-like domain exposed to the solvent. It binds to the T5 capsid with a remarkably high affinity and its binding kinetics is characterized by a very slow dissociation rate. We propose that the conformational exchange events observed in the capsid-binding domain enable rearrangements upon binding that contribute to the quasi-irreversibility of the pb10-capsid interaction. Moreover we show that pb10 binding is a highly cooperative process, which favours immediate rebinding of newly dissociated pb10 to the 120 hexamers of the capsid protein. In extreme conditions, pb10 protects the phage from releasing its genome. We conclude that pb10 may function to reinforce the capsid thus favouring phage survival in harsh environments.
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Affiliation(s)
- Emeline Vernhes
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette cedex, France
| | - Madalena Renouard
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette cedex, France
| | - Bernard Gilquin
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette cedex, France
| | - Philippe Cuniasse
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette cedex, France
| | - Dominique Durand
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette cedex, France
| | - Patrick England
- Institut Pasteur, Biophysique Moléculaire, Citech, UMR 3528, Paris, France
| | - Sylviane Hoos
- Institut Pasteur, Biophysique Moléculaire, Citech, UMR 3528, Paris, France
| | - Alexis Huet
- Department of Structural Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - James F Conway
- Department of Structural Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Anatoly Glukhov
- Institute of Protein Research, Russian Academy of Sciences, Pushchino, Russia
| | - Vladimir Ksenzenko
- Institute of Protein Research, Russian Academy of Sciences, Pushchino, Russia
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, Univ Paris-Sud, Université Paris-Saclay, CNRS UPR 2301, Gif-sur-Yvette, France
| | - Naïma Nhiri
- Institut de Chimie des Substances Naturelles, Univ Paris-Sud, Université Paris-Saclay, CNRS UPR 2301, Gif-sur-Yvette, France
| | - Sophie Zinn-Justin
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette cedex, France
| | - Pascale Boulanger
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette cedex, France
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Guiu B, Quenet F, Escal L, Bibeau F, Piron L, Rouanet P, Fabre JM, Jacquet E, Denys A, Kotzki PO, Verzilli D, Deshayes E. Extended liver venous deprivation before major hepatectomy induces marked and very rapid increase in future liver remnant function. Eur Radiol 2017; 27:3343-3352. [DOI: 10.1007/s00330-017-4744-9] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 12/23/2016] [Accepted: 01/04/2017] [Indexed: 02/06/2023]
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Lesne E, Fu Y, Oyarzun S, Rojas-Sánchez JC, Vaz DC, Naganuma H, Sicoli G, Attané JP, Jamet M, Jacquet E, George JM, Barthélémy A, Jaffrès H, Fert A, Bibes M, Vila L. Highly efficient and tunable spin-to-charge conversion through Rashba coupling at oxide interfaces. Nat Mater 2016; 15:1261-1266. [PMID: 27571452 DOI: 10.1038/nmat4726] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 07/08/2016] [Indexed: 05/23/2023]
Abstract
The spin-orbit interaction couples the electrons' motion to their spin. As a result, a charge current running through a material with strong spin-orbit coupling generates a transverse spin current (spin Hall effect, SHE) and vice versa (inverse spin Hall effect, ISHE). The emergence of SHE and ISHE as charge-to-spin interconversion mechanisms offers a variety of novel spintronic functionalities and devices, some of which do not require any ferromagnetic material. However, the interconversion efficiency of SHE and ISHE (spin Hall angle) is a bulk property that rarely exceeds ten percent, and does not take advantage of interfacial and low-dimensional effects otherwise ubiquitous in spintronic hetero- and mesostructures. Here, we make use of an interface-driven spin-orbit coupling mechanism-the Rashba effect-in the oxide two-dimensional electron system (2DES) LaAlO3/SrTiO3 to achieve spin-to-charge conversion with unprecedented efficiency. Through spin pumping, we inject a spin current from a NiFe film into the oxide 2DES and detect the resulting charge current, which can be strongly modulated by a gate voltage. We discuss the amplitude of the effect and its gate dependence on the basis of the electronic structure of the 2DES and highlight the importance of a long scattering time to achieve efficient spin-to-charge interconversion.
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Affiliation(s)
- E Lesne
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - Yu Fu
- Spintec, Institut Nanosciences et Cryogenie, Univ. Grenoble Alpes, CEA, CNRS, F-38000 Grenoble, France
| | - S Oyarzun
- Spintec, Institut Nanosciences et Cryogenie, Univ. Grenoble Alpes, CEA, CNRS, F-38000 Grenoble, France
- Departamento de Física, CEDENNA, Universidad de Santiago de Chile (USACH), Avenida Ecuador 3493, 9170124 Santiago, Chile
| | - J C Rojas-Sánchez
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - D C Vaz
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - H Naganuma
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
- Tohoku University, Department of Applied Physics, 6-6-05 Aoba, Aramaki, Aoba, Sendai 980-8579, Japan
| | - G Sicoli
- Institut Nanosciences et Cryogenie, Univ. Grenoble Alpes, CEA, F-38000 Grenoble, France
| | - J-P Attané
- Spintec, Institut Nanosciences et Cryogenie, Univ. Grenoble Alpes, CEA, CNRS, F-38000 Grenoble, France
| | - M Jamet
- Spintec, Institut Nanosciences et Cryogenie, Univ. Grenoble Alpes, CEA, CNRS, F-38000 Grenoble, France
| | - E Jacquet
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - J-M George
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - A Barthélémy
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - H Jaffrès
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - A Fert
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - M Bibes
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - L Vila
- Spintec, Institut Nanosciences et Cryogenie, Univ. Grenoble Alpes, CEA, CNRS, F-38000 Grenoble, France
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Deville C, Girard-Blanc C, Assrir N, Nhiri N, Jacquet E, Bontems F, Renault L, Petres S, van Heijenoort C. Mutations in actin used for structural studies partially disrupt β-thymosin/WH2 domains interaction. FEBS Lett 2016; 590:3690-3699. [PMID: 27680677 DOI: 10.1002/1873-3468.12423] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 07/06/2016] [Revised: 08/25/2016] [Accepted: 09/06/2016] [Indexed: 11/10/2022]
Abstract
Understanding the structural basis of actin cytoskeleton remodeling requires stabilization of actin monomers, oligomers, and filaments in complex with partner proteins, using various biochemical strategies. Here, we report a dramatic destabilization of the dynamic interaction with a model β-thymosin/WH2 domain induced by mutations in actin. This result underlines that mutant actins should be used with prudence to characterize interactions with intrinsically disordered partners as destabilization of dynamic interactions, although identifiable by NMR, may be invisible to other structural techniques. It also highlights how both β-thymosin/WH2 domains and actin tune local structure and dynamics in regulatory processes involving intrinsically disordered domains.
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Affiliation(s)
- Célia Deville
- Structural Chemistry and Biology Team, Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | | | - Nadine Assrir
- Structural Chemistry and Biology Team, Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Naïma Nhiri
- Structural Chemistry and Biology Team, Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Eric Jacquet
- Structural Chemistry and Biology Team, Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - François Bontems
- Structural Chemistry and Biology Team, Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Louis Renault
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | | | - Carine van Heijenoort
- Structural Chemistry and Biology Team, Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France.
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47
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Pluchart H, Jacquet E, Charlety D, Allenet B, Bedouch P, Mousseau M. Long-Term Survivor with Intrathecal and Intravenous Trastuzumab Treatment in Metastatic Breast Cancer. Target Oncol 2016; 11:687-691. [DOI: 10.1007/s11523-016-0429-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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48
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Tatay S, Galbiati M, Delprat S, Barraud C, Bouzehouane K, Collin S, Deranlot C, Jacquet E, Seneor P, Mattana R, Petroff F. Self-assembled monolayers based spintronics: from ferromagnetic surface functionalization to spin-dependent transport. J Phys Condens Matter 2016; 28:094010. [PMID: 26871682 DOI: 10.1088/0953-8984/28/9/094010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Chemically functionalized surfaces are studied for a wide range of applications going from medicine to electronics. Whereas non-magnetic surfaces have been widely studied, functionalization of magnetic surfaces is much less common and has almost never been used for spintronics applications. In this article we present the functionalization of La2/3Sr1/3MnO3, a ferromagnetic oxide, with self-assembled monolayers for spintronics. La2/3Sr1/3MnO3 is the prototypical half-metallic manganite used in spintronics studies. First, we show that La2/3Sr1/3MnO3 can be functionalized by alkylphosphonic acid molecules. We then emphasize the use of these functionalized surfaces in spintronics devices such as magnetic tunnel junctions fabricated using a nano-indentation based lithography technique. The observed exponential increase of tunnel resistance as a function of alkyl chain length is a direct proof of the successful connection of molecules to ferromagnetic electrodes. For all alkyl chains studied we obtain stable and robust tunnel magnetoresistance, with effects ranging from a few tens to 10 000%. These results show that functionalized electrodes can be integrated in spintronics devices and open the door to a molecular engineering of spintronics.
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Affiliation(s)
- Sergio Tatay
- Unité Mixte de Physique CNRS-Thales, 1 Av. A. Fresnel, 91767 Palaiseau, France and Université Paris-Sud, 91405 Orsay, France. Instituto de Ciencia Molecular (ICMol), Universitat de Valencia, C. Caterdratico Jose Beltran 2, 46980 Paterna, Spain
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Remache D, Chambert J, Pauchot J, Jacquet E. Numerical analysis of the V-Y shaped advancement flap. Med Eng Phys 2015; 37:987-94. [PMID: 26342442 DOI: 10.1016/j.medengphy.2015.08.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 12/16/2014] [Revised: 07/08/2015] [Accepted: 08/01/2015] [Indexed: 11/29/2022]
Abstract
The V-Y advancement flap is a usual technique for the closure of skin defects. A triangular flap is incised adjacent to a skin defect of rectangular shape. As the flap is advanced to close the initial defect, two smaller defects in the shape of a parallelogram are formed with respect to a reflection symmetry. The height of the defects depends on the apex angle of the flap and the closure efforts are related to the defects height. Andrades et al. 2005 have performed a geometrical analysis of the V-Y flap technique in order to reach a compromise between the flap size and the defects width. However, the geometrical approach does not consider the mechanical properties of the skin. The present analysis based on the finite element method is proposed as a complement to the geometrical one. This analysis aims to highlight the major role of the skin elasticity for a full analysis of the V-Y advancement flap. Furthermore, the study of this technique shows that closing at the flap apex seems mechanically the most interesting step. Thus different strategies of defect closure at the flap apex stemming from surgeon's know-how have been tested by numerical simulations.
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Affiliation(s)
- D Remache
- University of Franche-Comté, 1 rue Claude Goudimel, Besançon Cedex 25030, France; Department of Applied Mechanics, FEMTO-ST Institute, CNRS UMR 6174, 24 rue de l'Épitaphe, Besançon 25000, France; University Bourgogne Franche-Comté (UBFC), France.
| | - J Chambert
- University of Franche-Comté, 1 rue Claude Goudimel, Besançon Cedex 25030, France; Department of Applied Mechanics, FEMTO-ST Institute, CNRS UMR 6174, 24 rue de l'Épitaphe, Besançon 25000, France; University Bourgogne Franche-Comté (UBFC), France.
| | - J Pauchot
- University of Franche-Comté, 1 rue Claude Goudimel, Besançon Cedex 25030, France; Orthopedic, Traumatology, Aesthetic, Plastic, Reconstructive and Hand Surgery Unit, University Hospital of Besançon, 3 bd Alexandre Fleming, Besançon 25030, France; Research Unit, EA 4268 I4S IFR 133 INSERM, Besançon 25030, France.
| | - E Jacquet
- University of Franche-Comté, 1 rue Claude Goudimel, Besançon Cedex 25030, France; Department of Applied Mechanics, FEMTO-ST Institute, CNRS UMR 6174, 24 rue de l'Épitaphe, Besançon 25000, France; University Bourgogne Franche-Comté (UBFC), France.
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50
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Andreazza S, Bouleau S, Martin B, Lamouroux A, Ponien P, Papin C, Chélot E, Jacquet E, Rouyer F. Daytime CLOCK Dephosphorylation Is Controlled by STRIPAK Complexes in Drosophila. Cell Rep 2015; 11:1266-79. [PMID: 25981041 DOI: 10.1016/j.celrep.2015.04.033] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 02/23/2015] [Accepted: 04/16/2015] [Indexed: 11/29/2022] Open
Abstract
In the Drosophila circadian oscillator, the CLOCK/CYCLE complex activates transcription of period (per) and timeless (tim) in the evening. PER and TIM proteins then repress CLOCK (CLK) activity during the night. The pace of the oscillator depends upon post-translational regulation that affects both positive and negative components of the transcriptional loop. CLK protein is highly phosphorylated and inactive in the morning, whereas hypophosphorylated active forms are present in the evening. How this critical dephosphorylation step is mediated is unclear. We show here that two components of the STRIPAK complex, the CKA regulatory subunit of the PP2A phosphatase and its interacting protein STRIP, promote CLK dephosphorylation during the daytime. In contrast, the WDB regulatory PP2A subunit stabilizes CLK without affecting its phosphorylation state. Inhibition of the PP2A catalytic subunit and CKA downregulation affect daytime CLK similarly, suggesting that STRIPAK complexes are the main PP2A players in producing transcriptionally active hypophosphorylated CLK.
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Affiliation(s)
- Simonetta Andreazza
- Université Paris-Saclay, Université Paris-Sud, CNRS, UMR 9197, Institut des Neurosciences Paris-Saclay, 91190 Gif-sur-Yvette, France
| | - Sylvina Bouleau
- Université Paris-Saclay, Université Paris-Sud, CNRS, UMR 9197, Institut des Neurosciences Paris-Saclay, 91190 Gif-sur-Yvette, France
| | - Béatrice Martin
- Université Paris-Saclay, Université Paris-Sud, CNRS, UMR 9197, Institut des Neurosciences Paris-Saclay, 91190 Gif-sur-Yvette, France
| | - Annie Lamouroux
- Université Paris-Saclay, Université Paris-Sud, CNRS, UMR 9197, Institut des Neurosciences Paris-Saclay, 91190 Gif-sur-Yvette, France
| | - Prishila Ponien
- Institut de Chimie des Substances Naturelles, CNRS, UPR 2301, 91190 Gif-sur-Yvette, France
| | - Christian Papin
- Université Paris-Saclay, Université Paris-Sud, CNRS, UMR 9197, Institut des Neurosciences Paris-Saclay, 91190 Gif-sur-Yvette, France
| | - Elisabeth Chélot
- Université Paris-Saclay, Université Paris-Sud, CNRS, UMR 9197, Institut des Neurosciences Paris-Saclay, 91190 Gif-sur-Yvette, France
| | - Eric Jacquet
- Institut de Chimie des Substances Naturelles, CNRS, UPR 2301, 91190 Gif-sur-Yvette, France
| | - François Rouyer
- Université Paris-Saclay, Université Paris-Sud, CNRS, UMR 9197, Institut des Neurosciences Paris-Saclay, 91190 Gif-sur-Yvette, France.
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