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1. Genetic screens reveal mechanisms for the transcriptional regulation of tissue-specific genes in normal cells and tumors

Author

Morgane Bourmaud, Anda Huna, Ikrame Naciri, Marthe Laisné, Pierre-Antoine Defossez, Selene Di Carlo, Nikhil Gupta, David Bernard, Lucie Peduto, Laure Ferry, Olivier Kirsh, Nadine Martin, Centre épigénétique et destin cellulaire (EDC), Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Biologie de l'Os et du Cartilage : Régulations et Ciblages Thérapeutiques (BIOSCAR (UMR_S_1132 / U1132)), Université Paris Diderot - Paris 7 (UPD7)-Institut National de la Santé et de la Recherche Médicale (INSERM), Stroma, inflammation et réparation tissulaire - Stroma, Inflammation and Tissue Repair, Institut Pasteur [Paris] (IP)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche en Cancérologie de Lyon (UNICANCER/CRCL), Centre Léon Bérard [Lyon]-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), National Institutes of Health [EpiCALC 2013 to P.A.D. and D.B.], Institut National du Cancer [PLBio15–013 to P.A.D. and D.B.], Labex ‘Who am I?’ [ANR-11-LABX-0071 under ANR-11-IDEX-005–02, to P.A.D.], European Research Council [ERC648428-PERIF to L.P.], Fondation ARC [4th-year PhD scholarship to I.N., Programme Labellisé PGA1/RF20180206807 to P.A.D.], Fondation pour la Recherche Médicale [postdoctoral fellowship to A.H.]. The open access publication charge for this paper has been waived by Oxford University Press - NAR Editorial Board members are entitled to one free paper per year in recognition of their work on behalf of the journal., The authors thanks the Genomics Platform of Institut Curie for Nanostring analysis. The Nanostring platform of Institut Curie was initiated with the support of French grants (LabEx and EquipEx): ANR-10-IDEX-0001–02 PSL, ANR-11-LBX-0044 and « INCa-DGOS- 4654 » SIRIC11–002. We thank Valérie Doye, Stéphanie Bolhy, and Philippe Girard at Institut Jacques Monod for help with the Incucyte. Concerning the lentiviral vector production, we acknowledge Christophe Huret and the Paris Diderot Vectorology Platform of Paris Diderot University, Sorbonne Paris Cité, CNRS UMR 7216, Paris, France. We acknowledge the kind help of Elisabeth Brambilla with some experiments that do not appear in the submitted version of the manuscript. For the gift of reagents we acknowledge the kind contribution of Katrin Chua, Philippe Chavrier, Annabelle Decottignies, Sébastien Jauliac and Michael Kracht. Finally, we thank the following colleagues for useful discussions: Jean-Marc Vanacker, Robert Dante, Nathalie Théret, Saadi Khochbin, Céline Prunier, Céline Vallot, Claire Rougeulle, Isabelle Bernard-Pierrot, Slimane Ait-si-ali, Jonathan Weitzman, Valérie Lallemand-Mezger, ANR-11-IDEX-0005,USPC,Université Sorbonne Paris Cité(2011), European Project: 648428,H2020,ERC-2014-CoG,PERIF(2015), Centre épigénétique et destin cellulaire (EDC (UMR_7216)), Institut Pasteur [Paris]-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Jacques Monod (IJM), Biologie du Développement et Reproduction (BDR), Institut National de la Recherche Agronomique (INRA), École pratique des hautes études (EPHE), Centre de Recherche en Cancérologie de Lyon (CRCL), Stroma, inflammation et réparation tissulaire, ATMEL [Rousset], Institut de Génétique Moléculaire de Montpellier (IGMM), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), TOMASSO DEVERGE, Carina, Université Sorbonne Paris Cité - - USPC2011 - ANR-11-IDEX-0005 - IDEX - VALID, and Perivascular cells at the crossroads of inflammation, regeneration and fibrosis - PERIF - - H20202015-11-01 - 2020-10-31 - 648428 - VALID

Subjects
Transcription, Genetic, [SDV]Life Sciences [q-bio], ADAM12 Protein, Triple Negative Breast Neoplasms, Biology, Protein Serine-Threonine Kinases, Cell Line, Transforming Growth Factor beta1, 03 medical and health sciences, 0302 clinical medicine, RNA interference, Cell Line, Tumor, Neoplasms, [SDV.BBM.GTP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Genomics [q-bio.GN], Gene expression, Genetics, Humans, Epigenetics, Gene, ComputingMilieux_MISCELLANEOUS, 030304 developmental biology, Histone Acetyltransferases, Regulation of gene expression, 0303 health sciences, Gene regulation, Chromatin and Epigenetics, Chromatin, Cell biology, Gene Expression Regulation, Neoplastic, [SDV] Life Sciences [q-bio], Gene Expression Regulation, Organ Specificity, Cancer cell, [SDV.BBM.GTP] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Genomics [q-bio.GN], RNA Interference, 030217 neurology & neurosurgery, Genetic screen, Signal Transduction
Abstract

International audience; The proper tissue-specific regulation of gene expression is essential for development and homeostasis in metazoans. However, the illegitimate expression of normally tissue-restricted genes-like testis- or placenta-specific genes-is frequently observed in tumors; this promotes transformation, but also allows immunotherapy. Two important questions are: how is the expression of these genes controlled in healthy cells? And how is this altered in cancer? To address these questions, we used an unbiased approach to test the ability of 350 distinct genetic or epigenetic perturbations to induce the illegitimate expression of over 40 tissue-restricted genes in primary human cells. We find that almost all of these genes are remarkably resistant to reactivation by a single alteration in signaling pathways or chromatin regulation. However, a few genes differ and are more readily activated; one is the placenta-expressed gene ADAM12, which promotes invasion. Using cellular systems, an animal model, and bioinformatics, we find that a non-canonical but druggable TGF-β/KAT2A/TAK1 axis controls ADAM12 induction in normal and cancer cells. More broadly, our data show that illegitimate gene expression in cancer is an heterogeneous phenomenon, with a few genes activatable by simple events, and most genes likely requiring a combination of events to become reactivated.

Published
2019

2. Translation and codon usage regulate Argonaute slicer activity to trigger small RNA biogenesis

Author

Germano Cecere, Meetali Singh, Eric Cornes, Blaise Li, Piergiuseppe Quarato, Loan Bourdon, Florent Dingli, Damarys Loew, Simone Procaccia, Mécanismes de l'Hérédité épigénétique / Mechanisms of epigenetic inheritance, Centre National de la Recherche Scientifique (CNRS)-Institut Pasteur [Paris], Hub Bioinformatique et Biostatistique - Bioinformatics and Biostatistics HUB, Institut Pasteur [Paris]-Centre National de la Recherche Scientifique (CNRS), Collège doctoral [Sorbonne universités], Sorbonne Université (SU), Laboratoire de Spectrométrie de Masse Protéomique, Institut Curie [Paris], University of Trento [Trento], Some strains were provided by the CGC, funded by the NIH Office of Research Infrastructure Programs (P40 OD010440). This project has received funding from the Institut Pasteur, the CNRS, and the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program under grant agreement No. ERC-StG- 679243. M.S. and E.C. were supported by the Pasteur-Roux-Cantarini Postdoctoral Fellowship program. P.Q. was supported by Ligue Nationale Contre le Cancer (SFB19032). F.D. and D.L. have received funding from Région Ile-de-France and Fondation pour la Recherche Médicale grants to support this study., We would like to thank all the members of the Cecere laboratory, Manish Grover, Sudarshan Gadadhar, and Angela Anderson (Life Science Editors), for the helpful discussions on the paper. We thank Micheline Fromont for her help to set up Ribosome profiling. We thank Celine Didier for technical assistance. Sequencing was performed at the Biomics centre at the Institut Pasteur. We thank the Heng-Chi Lee lab, Miska lab, Desai lab, Strome lab, Mello lab, Updike lab, and Kennedy lab for sharing strains and reagents., European Project: 679243,H2020,ERC-2015-STG,RNAEPIGEN(2016), Institut Pasteur [Paris] (IP)-Centre National de la Recherche Scientifique (CNRS), and Collège Doctoral

Subjects
Science, Small RNAs, chemical and pharmacologic phenomena, RNA-Dependent RNA Polymerase, RNA decay, Ribosome, Catalysis, Article, Cytosol, Oogonia, Protein Biosynthesis, RNAi, Argonaute Proteins, Mutation, Animals, RNA Interference, RNA, Messenger, RNA, Small Interfering, Caenorhabditis elegans, Caenorhabditis elegans Proteins, Codon Usage, Ribosomes, [SDV.BDD]Life Sciences [q-bio]/Development Biology
Abstract

In the Caenorhabditis elegans germline, thousands of mRNAs are concomitantly expressed with antisense 22G-RNAs, which are loaded into the Argonaute CSR-1. Despite their essential functions for animal fertility and embryonic development, how CSR-1 22G-RNAs are produced remains unknown. Here, we show that CSR-1 slicer activity is primarily involved in triggering the synthesis of small RNAs on the coding sequences of germline mRNAs and post-transcriptionally regulates a fraction of targets. CSR-1-cleaved mRNAs prime the RNA-dependent RNA polymerase, EGO-1, to synthesize 22G-RNAs in phase with translating ribosomes, in contrast to other 22G-RNAs mostly synthesized in germ granules. Moreover, codon optimality and efficient translation antagonize CSR-1 slicing and 22G-RNAs biogenesis. We propose that codon usage differences encoded into mRNA sequences might be a conserved strategy in eukaryotes to regulate small RNA biogenesis and Argonaute targeting., 22G-RNAs are single-stranded antisense small RNAs that are expressed in C. elegans germline. Here the authors show that CSR-1 dependent 22G-RNAs are produced in the cytosol on mRNAs actively engaged in translation and that codon usage of an mRNA regulates the biogenesis of CSR-1 dependent 22G-RNAs.

Published
2021