Environmental Genomics: Mechanisms and Approaches for Genomic Integrity
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Mutational Inactivation of STAG2 Causes Aneuploidy in Human Cancer
REPORTS mean difference for all rubric score elements was ing becomes a more commonly supported facet 18. C. L. Townsend, E. Heit, Mem. Cognit. 39, 204 (2011). rejected. Univariate statistical tests of the observed of STEM graduate education then students’ in- 19. D. F. Feldon, M. Maher, B. Timmerman, Science 329, 282 (2010). mean differences between the teaching-and- structional training and experiences would alle- 20. B. Timmerman et al., Assess. Eval. High. Educ. 36,509 research and research-only conditions indicated viate persistent concerns that current programs (2011). significant results for the rubric score elements underprepare future STEM faculty to perform 21. No outcome differences were detected as a function of “testability of hypotheses” [mean difference = their teaching responsibilities (28, 29). the type of teaching experience (TA or GK-12) within the P sample population participating in both research and 0.272, = 0.006; CI = (.106, 0.526)] with the null teaching. hypothesis rejected in 99.3% of generated data References and Notes 22. Materials and methods are available as supporting samples (Fig. 1) and “research/experimental de- 1. W. A. Anderson et al., Science 331, 152 (2011). material on Science Online. ” P 2. J. A. Bianchini, D. J. Whitney, T. D. Breton, B. A. Hilton-Brown, 23. R. L. Johnson, J. Penny, B. Gordon, Appl. Meas. Educ. 13, sign [mean difference = 0.317, = 0.002; CI = Sci. Educ. 86, 42 (2001). (.106, 0.522)] with the null hypothesis rejected in 121 (2000). 3. C. E. Brawner, R. M. Felder, R. Allen, R. Brent, 24. R. J. A. Little, J. -
Identification of Key Pathways and Genes in Endometrial Cancer Using Bioinformatics Analyses
ONCOLOGY LETTERS 17: 897-906, 2019 Identification of key pathways and genes in endometrial cancer using bioinformatics analyses YAN LIU, TENG HUA, SHUQI CHI and HONGBO WANG Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China Received March 16, 2018; Accepted October 12, 2018 DOI: 10.3892/ol.2018.9667 Abstract. Endometrial cancer (EC) is one of the most Introduction common gynecological cancer types worldwide. However, to the best of our knowledge, its underlying mechanisms Endometrial carcinoma (EC) is one of the most common remain unknown. The current study downloaded three mRNA gynecological cancer types, with increasing global incidence and microRNA (miRNA) datasets of EC and normal tissue in recent years (1). A total of 60,050 cases of EC and 10,470 samples, GSE17025, GSE63678 and GSE35794, from the EC-associated cases of mortality were reported in the USA in Gene Expression Omnibus to identify differentially expressed 2016 (1), which was markedly higher than the 2012 statistics genes (DEGs) and miRNAs (DEMs) in EC tumor tissues. of 47,130 cases and 8,010 mortalities (2). Although numerous The DEGs and DEMs were then validated using data from studies have been conducted to investigate the mechanisms of The Cancer Genome Atlas and subjected to gene ontology endometrial tumorigenesis and development, to the best of our and Kyoto Encyclopedia of Genes and Genomes pathway knowledge, the exact etiology remains unknown. Understanding analysis. STRING and Cytoscape were used to construct a the potential molecular mechanisms underlying EC initiation protein-protein interaction network and the prognostic effects and progression is of great clinical significance. -
Redundant and Specific Roles of Cohesin STAG Subunits in Chromatin Looping and Transcriptional Control
Downloaded from genome.cshlp.org on October 10, 2021 - Published by Cold Spring Harbor Laboratory Press Research Redundant and specific roles of cohesin STAG subunits in chromatin looping and transcriptional control Valentina Casa,1,6 Macarena Moronta Gines,1,6 Eduardo Gade Gusmao,2,3,6 Johan A. Slotman,4 Anne Zirkel,2 Natasa Josipovic,2,3 Edwin Oole,5 Wilfred F.J. van IJcken,1,5 Adriaan B. Houtsmuller,4 Argyris Papantonis,2,3 and Kerstin S. Wendt1 1Department of Cell Biology, Erasmus MC, 3015 GD Rotterdam, The Netherlands; 2Center for Molecular Medicine Cologne, University of Cologne, 50931 Cologne, Germany; 3Institute of Pathology, University Medical Center, Georg-August University of Göttingen, 37075 Göttingen, Germany; 4Optical Imaging Centre, Erasmus MC, 3015 GD Rotterdam, The Netherlands; 5Center for Biomics, Erasmus MC, 3015 GD Rotterdam, The Netherlands Cohesin is a ring-shaped multiprotein complex that is crucial for 3D genome organization and transcriptional regulation during differentiation and development. It also confers sister chromatid cohesion and facilitates DNA damage repair. Besides its core subunits SMC3, SMC1A, and RAD21, cohesin in somatic cells contains one of two orthologous STAG sub- units, STAG1 or STAG2. How these variable subunits affect the function of the cohesin complex is still unclear. STAG1- and STAG2-cohesin were initially proposed to organize cohesion at telomeres and centromeres, respectively. Here, we uncover redundant and specific roles of STAG1 and STAG2 in gene regulation and chromatin looping using HCT116 cells with an auxin-inducible degron (AID) tag fused to either STAG1 or STAG2. Following rapid depletion of either subunit, we perform high-resolution Hi-C, gene expression, and sequential ChIP studies to show that STAG1 and STAG2 do not co-occupy in- dividual binding sites and have distinct ways by which they affect looping and gene expression. -
Low Tolerance for Transcriptional Variation at Cohesin Genes Is Accompanied by Functional Links to Disease-Relevant Pathways
bioRxiv preprint doi: https://doi.org/10.1101/2020.04.11.037358; this version posted April 13, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. Title Low tolerance for transcriptional variation at cohesin genes is accompanied by functional links to disease-relevant pathways Authors William Schierdingǂ1, Julia Horsfieldǂ2,3, Justin O’Sullivan1,3,4 ǂTo whom correspondence should be addressed. 1 Liggins Institute, The University of Auckland, Auckland, New Zealand 2 Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand 3 The Maurice Wilkins Centre for Biodiscovery, The University of Auckland, Auckland, New Zealand 4 MRC Lifecourse Epidemiology Unit, University of Southampton Acknowledgements This work was supported by a Royal Society of New Zealand Marsden Grant to JH and JOS (16-UOO- 072), and WS was supported by the same grant. Contributions WS planned the study, performed analyses, and drafted the manuscript. JH and JOS revised the manuscript. Competing interests None declared. bioRxiv preprint doi: https://doi.org/10.1101/2020.04.11.037358; this version posted April 13, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. Abstract Variants in DNA regulatory elements can alter the regulation of distant genes through spatial- regulatory connections. -
Gene Regulation by Cohesin in Cancer: Is the Ring an Unexpected Party to Proliferation?
Published OnlineFirst September 22, 2011; DOI: 10.1158/1541-7786.MCR-11-0382 Molecular Cancer Review Research Gene Regulation by Cohesin in Cancer: Is the Ring an Unexpected Party to Proliferation? Jenny M. Rhodes, Miranda McEwan, and Julia A. Horsfield Abstract Cohesin is a multisubunit protein complex that plays an integral role in sister chromatid cohesion, DNA repair, and meiosis. Of significance, both over- and underexpression of cohesin are associated with cancer. It is generally believed that cohesin dysregulation contributes to cancer by leading to aneuploidy or chromosome instability. For cancers with loss of cohesin function, this idea seems plausible. However, overexpression of cohesin in cancer appears to be more significant for prognosis than its loss. Increased levels of cohesin subunits correlate with poor prognosis and resistance to drug, hormone, and radiation therapies. However, if there is sufficient cohesin for sister chromatid cohesion, overexpression of cohesin subunits should not obligatorily lead to aneuploidy. This raises the possibility that excess cohesin promotes cancer by alternative mechanisms. Over the last decade, it has emerged that cohesin regulates gene transcription. Recent studies have shown that gene regulation by cohesin contributes to stem cell pluripotency and cell differentiation. Of importance, cohesin positively regulates the transcription of genes known to be dysregulated in cancer, such as Runx1, Runx3, and Myc. Furthermore, cohesin binds with estrogen receptor a throughout the genome in breast cancer cells, suggesting that it may be involved in the transcription of estrogen-responsive genes. Here, we will review evidence supporting the idea that the gene regulation func- tion of cohesin represents a previously unrecognized mechanism for the development of cancer. -
The Expanding Universe of Cohesin Functions: a New Genome Stability Caretaker Involved in Human Disease and Cancer
THE EXPANDING UNIVERSE OF COHESIN FUNCTIONS: A NEW GENOME STABILITY CARETAKER INVOLVED IN HUMAN DISEASE AND CANCER. Linda Mannini, Stefania Menga, Antonio Musio To cite this version: Linda Mannini, Stefania Menga, Antonio Musio. THE EXPANDING UNIVERSE OF COHESIN FUNCTIONS: A NEW GENOME STABILITY CARETAKER INVOLVED IN HUMAN DISEASE AND CANCER.. Human Mutation, Wiley, 2010, 31 (6), pp.623. 10.1002/humu.21252. hal- 00552379 HAL Id: hal-00552379 https://hal.archives-ouvertes.fr/hal-00552379 Submitted on 6 Jan 2011 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Human Mutation THE EXPANDING UNIVERSE OF COHESIN FUNCTIONS: A NEW GENOME STABILITY CARETAKER INVOLVED IN HUMAN DISEASE AND CANCER. For Peer Review Journal: Human Mutation Manuscript ID: humu-2009-0533.R3 Wiley - Manuscript type: Review Date Submitted by the 02-Mar-2010 Author: Complete List of Authors: Mannini, Linda; Istituto di Tecnologie Biomediche C.N.R., Unita' di Pisa Menga, Stefania; Istituto di Tecnologie Biomediche C.N.R., Unita' di Pisa Musio, Antonio; Istituto di Tecnologie Biomediche C.N.R., Unita' di Pisa Cohesin, Cornelia de Lange syndrome, Roberts syndrome , Genome Key Words: instability, Cancer John Wiley & Sons, Inc. -
Die Molekularbiologie in Deutschland Von 1945 Bis 1975
Die Molekularbiologie in Deutschland von 1945 bis 1975 Ein internationaler Vergleich Inauguraldissertation zur Erlangung des Doktorgrades der Mathematisch-Naturwissenschaftlichen Fakultät der Universität zu Köln vorgelegt von Simone Wenkel aus Villingen-Schwenningen 2013 Die vorliegende Arbeit wurde am Institut für Genetik der Universität zu Köln in der Arbeitsgruppe für Geschichte der biologischen und chemischen Wissenschaften (Prof. Dr. rer. nat. Ute Deichmann) angefertigt. Berichterstatter: Prof. Dr. rer. nat. Ute Deichmann Prof. Dr. rer. nat. Thomas Wiehe Prüfungsvorsitz: Prof. Dr. rer. nat. Siegfried Roth Tag der mündlichen Prüfung: 24. Januar 2014 2 Zusammenfassung Die Molekularisierung der Biologie seit dem zweiten Drittel des 20. Jahrhunderts hatte immense Auswirkungen auf die Forschung und führte zu weitreichenden Anwendungen. Sie vereinte in einer Synthese viele biologische, biochemische und medizinische Disziplinen unter zentralen biologischen Fragestellungen. Durch die Entwicklung neuer Methoden und die Etablierung neuer Modellorganismen gelang es innerhalb weniger Jahrzehnte, die klassische Genetik, Mikrobiologie, Makromolekulare Chemie und Stoffwechselbiochemie miteinander in Verbindung zu bringen. In Deutschland war die Forschung nach 1945 viele Jahre lang geprägt von den Nachwirkungen der NS-Zeit und des Zweiten Weltkriegs, dem Wiederaufbau und der Neugründung von Instituten sowie großen Anstrengungen einzelner Wissenschaftler bei der Etablierung neuer Gebiete, wie dem der Molekularbiologie. Das Ziel dieser Arbeit ist es, erstmals ein umfassendes Bild der frühen Geschichte der Molkularbiologie in Deutschland zu erstellen und dieses im internationalen Vergleich zu betrachten. Zuerst wird die Entwicklung der Genetik und Molekularbiologie an deutschen Hochschulen und Forschungseinrichtungen im Hinblick auf die Institutionalisierung und Förderung analysiert. Neben der allgemeinen Entwicklung wird hier der Einfluss einzelner Personen, vor allem der des Physikers und Molekularbiologen Max Delbrück, herausgearbeitet. -
Homozygosity Mapping in Sheep Affected by Cervicothoracic Vertebral Subluxation: Candidate Gene Identification and Novel Mutation Investigation
HOMOZYGOSITY MAPPING IN SHEEP AFFECTED BY CERVICOTHORACIC VERTEBRAL SUBLUXATION: CANDIDATE GENE IDENTIFICATION AND NOVEL MUTATION INVESTIGATION RACHEL L. TULLOCH1, BRENDON A. O’ROURKE2, SHERNAE A. WOOLLEY1, MEHAR S. KHATKAR1 and IMKE TAMMEN1 Summary Cervicothoracic vertebral subluxation (CVS) is an inherited disorder affecting Merino sheep. Affected animals exhibit sudden onset of ataxia in sheep from 9 months to 3 years of age, the disorder is of an economic and welfare concern to the industry. The prevalence of this disorder both nationally and internationally is unknown due to its ambiguous phenotype. This is the first study to map investigate genetic variations as a likely cause of CVS in Merino sheep. Twelve clinically affected animals from two separate Australian properties (Riverina, NSW, and Central West, NSW) were sampled and genotyped using the Illumina® OvineSNP50 BeadChip. The PDS5 homologue B gene was identified as a positional candidate gene using a homozygosity mapping approach. Sanger sequencing of RT-PCR products was utilised to sequence cDNA of the candidate gene in an affected animal. DNA sequencing revealed four variants within the candidate gene when compared to a reference sequence (GenBank® XM_015098134), a 6pb insertion (3619_3620insGTAAGG), two possible missense mutations (3412_C>A; 4342A>T) and an exon deletion (4066del-exon33). The 6bp insertion has been previously catalogued in other reference genomes, the two missense mutations appear to be a novel identification and the exon 33 deletion may represent a splice variant. Further analysis is required to confirm if any variant is pathogenic. A diagnostic test may be developed using information about associated SNP or after confirmation of a disease casing variant in the PDS5B gene. -
Research Article Integrative Genomics Identified RFC3 As an Amplified
Author Manuscript Published OnlineFirst on February 10, 2012; DOI: 10.1158/1078-0432.CCR-11-1431 Author manuscripts have been peer reviewed and accepted for publication but have not yet been edited. Research Article Integrative Genomics Identified RFC3 as an Amplified Candidate Oncogene in Esophageal Adenocarcinoma William W. Lockwood1,2,3*, Kelsie L. Thu1,3, Lin Lin4, Larissa A. Pikor1, Raj Chari1,5, Wan L. Lam1† and David G. Beer4† 1Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, BC, Canada 2Current Affiliation: National Human Genome Research Institute - NIH, Bethesda, Maryland, USA 4Department of Surgery, University of Michigan, Ann Arbor, Michigan, USA 5Current Affiliation: Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA 3These authors contributed equally † These principal investigators contributed equally Running Title: RFC3 Activation in Esophageal Cancer Keywords: RFC3; esophageal adenocarcinoma; Barrett's esophagus; DNA amplification Financial Support: Canadian Institutes of Health Research, Canadian Cancer Society and Vanier Canada Graduate Scholarship. *Corresponding author: William W. Lockwood, Cancer Genetics Branch, National Human Genome Research Institute, NIH, 50 South Drive, Bethesda, MD USA 20892. Phone: (301) 594- 9773. Fax: (301) 443-9139. E-mail: [email protected] Disclosures: The authors have nothing to disclose. Word Count: 4,745 Total Number of Figures and Tables: 6 Transcript Profiling: GEO Accession Numbers: GSE22524, GSE1420, GSE19417, GSE2845, GSE3141. caArray: jacob-00182. caBIG (https://cabig.nci.nih.gov/tools/caArray_GSKdata). Wellcome Trust Sanger Institute CGP Data Archive (sanger.ac.uk/genetics/CGP/Archive/) 1 Downloaded from clincancerres.aacrjournals.org on September 28, 2021. © 2012 American Association for Cancer Research. Author Manuscript Published OnlineFirst on February 10, 2012; DOI: 10.1158/1078-0432.CCR-11-1431 Author manuscripts have been peer reviewed and accepted for publication but have not yet been edited. -
A High-Throughput Approach to Uncover Novel Roles of APOBEC2, a Functional Orphan of the AID/APOBEC Family
Rockefeller University Digital Commons @ RU Student Theses and Dissertations 2018 A High-Throughput Approach to Uncover Novel Roles of APOBEC2, a Functional Orphan of the AID/APOBEC Family Linda Molla Follow this and additional works at: https://digitalcommons.rockefeller.edu/ student_theses_and_dissertations Part of the Life Sciences Commons A HIGH-THROUGHPUT APPROACH TO UNCOVER NOVEL ROLES OF APOBEC2, A FUNCTIONAL ORPHAN OF THE AID/APOBEC FAMILY A Thesis Presented to the Faculty of The Rockefeller University in Partial Fulfillment of the Requirements for the degree of Doctor of Philosophy by Linda Molla June 2018 © Copyright by Linda Molla 2018 A HIGH-THROUGHPUT APPROACH TO UNCOVER NOVEL ROLES OF APOBEC2, A FUNCTIONAL ORPHAN OF THE AID/APOBEC FAMILY Linda Molla, Ph.D. The Rockefeller University 2018 APOBEC2 is a member of the AID/APOBEC cytidine deaminase family of proteins. Unlike most of AID/APOBEC, however, APOBEC2’s function remains elusive. Previous research has implicated APOBEC2 in diverse organisms and cellular processes such as muscle biology (in Mus musculus), regeneration (in Danio rerio), and development (in Xenopus laevis). APOBEC2 has also been implicated in cancer. However the enzymatic activity, substrate or physiological target(s) of APOBEC2 are unknown. For this thesis, I have combined Next Generation Sequencing (NGS) techniques with state-of-the-art molecular biology to determine the physiological targets of APOBEC2. Using a cell culture muscle differentiation system, and RNA sequencing (RNA-Seq) by polyA capture, I demonstrated that unlike the AID/APOBEC family member APOBEC1, APOBEC2 is not an RNA editor. Using the same system combined with enhanced Reduced Representation Bisulfite Sequencing (eRRBS) analyses I showed that, unlike the AID/APOBEC family member AID, APOBEC2 does not act as a 5-methyl-C deaminase. -
PDS5B Regulates Cell Proliferation and Motility Via Upregulation of Ptch2 In
Cancer Letters 460 (2019) 65–74 Contents lists available at ScienceDirect Cancer Letters journal homepage: www.elsevier.com/locate/canlet Original Articles PDS5B regulates cell proliferation and motility via upregulation of Ptch2 in T pancreatic cancer cells ∗∗ ∗ Jia Maa, ,1, Yue Cuib,1, Tong Caoc, Hui Xud, Ying Shia, Jun Xiaa, Yisheng Taoe, Z. Peter Wanga,f, a Department of Biochemistry and Molecular Biology, School of Laboratory Medicine, Bengbu Medical College, Anhui, 233030, China b Research Center of Clinical Laboratory Science, Bengbu Medical College, Anhui, China, 233030, China c Department of Clinical Laboratory, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, 233004, China d Department of Laboratory Medicine, Bengbu Medical College, Anhui, 233030, China e Department of Pathology, The First Affiliated Hospital of Bengbu Medical College, Anhui, China, 233030, China f Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, 02115, MA, USA ARTICLE INFO ABSTRACT Keywords: Pds5b (precocious dissociation of sisters 5B) is involved in both tumorigenesis and cancer progression; however, Pds5b the functions and molecular mechanisms of Pds5b in pancreatic cancer (PC) are unknown. Several approaches Ptch2 were conducted to investigate the molecular basis of Pds5b-related PC progression, including transfection, MTT, Invasion FACS, western blotting, wound healing assay, transwell chamber invasion assay, and immunohistochemical Growth methods. Pds5b overexpression inhibited cell growth and induced apoptosis, whereas the inhibition of Pds5b Pancreatic cancer promoted growth of PC cells. Moreover, Pds5b overexpression inhibited cell migration and invasion, while the downregulation of Pds5b enhanced cell motility. Furthermore, reduced Pds5b expression was associated with survival in PC patients. -
Why Is DNA Double Stranded? the Discovery of DNA Excision Repair Mechanisms
| PERSPECTIVES Why Is DNA Double Stranded? The Discovery of DNA Excision Repair Mechanisms Bernard S. Strauss1 Department of Molecular Genetics and Cell Biology, The University of Chicago, Illinois 60637 ORCID ID: 0000-0001-7548-6461 (B.S.S.) ABSTRACT The persistence of hereditary traits over many generations testifies to the stability of the genetic material. Although the Watson–Crick structure for DNA provided a simple and elegant mechanism for replication, some elementary calculations implied that mistakes due to tautomeric shifts would introduce too many errors to permit this stability. It seemed evident that some additional mechanism(s) to correct such errors must be required. This essay traces the early development of our understanding of such mech- anisms. Their key feature is the cutting out of a section of the strand of DNA in which the errors or damage resided, and its replacement by a localized synthesis using the undamaged strand as a template. To the surprise of some of the founders of molecular biology, this understanding derives in large part from studies in radiation biology, a field then considered by many to be irrelevant to studies of gene structure and function. Furthermore, genetic studies suggesting mechanisms of mismatch correction were ignored for almost a decade by biochemists unacquainted or uneasy with the power of such analysis. The collective body of results shows that the double-stranded structure of DNA is critical not only for replication but also as a scaffold for the correction of errors and the removal of damage to DNA. As additional discoveries were made, it became clear that the mechanisms for the repair of damage were involved not only in maintaining the stability of the genetic material but also in a variety of biological phenomena for increasing diversity, from genetic recombination to the immune response.