ARCIVES Genome Sequencing Technology: Improvement of the Electrophoretic Sequencing Process and Analysis of the Sequencing Tool Industry by Kazunori Maruyama Ph.D

Total Page:16

File Type:pdf, Size:1020Kb

ARCIVES Genome Sequencing Technology: Improvement of the Electrophoretic Sequencing Process and Analysis of the Sequencing Tool Industry by Kazunori Maruyama Ph.D Genome Sequencing Technology: Improvement of the Electrophoretic Sequencing Process and Analysis of the Sequencing Tool Industry by Kazunori Maruyama Ph.D. in Material Science, Mie University (2001) M.S. in Macromolecular Science, Osaka University (1993) Submitted to the Alfred P. Sloan School of Management and the Department of Chemical Engineering in Partial Fulfillment of the Requirements for the Degrees of Master of BusinessAdministration and Master of Science in Chemical Engineering In Conjunction with the Leaders for Manufacturing Program at the MASSACHUSETTSINSUE Massachusetts Institute of Technology OF TECHNOLOY June 2005 JUN 01 2005 02005 Massachusetts Institute of Technology. All rights reserved. LIBRARIES Signature of Author Alfred P. Sloan School of Management Department of Chemical Engineering May 6, 2005 Certified by -- Roy E. Welsch Professor of Statistics and Management Science Thesis Advisor Certified by r Patrick S. Doyle Assistant-Professor of Chemical Engineering Thesis Advisor Accepted by · - Margaret Andrews Alfred P. Sloan School of Management Executive Director of Masters Program Accepted by - - Daniel Blankschtein Department of Chemical Engineering Graduate Committee Chairman .ARCIVES Genome Sequencing Technology: Improvement of the Electrophoretic Sequencing Process and Analysis of the Sequencing Tool Industry by Kazunori Maruyama Ph.D. in Material Science, Mie University (2001) M.S. in Macromolecular Science, Osaka University (1993) Submitted to the Alfred P. Sloan School of Management and the Department of Chemical Engineering in Partial Fulfillment of the Requirements for the Degrees of Master of Business Administration and Master of Science in Chemical Engineering ABSTRACT A primary bottleneck in DNA-sequencing operations is the capacity of the detection process. Although today's capillary electrophoresis DNA sequencers are faster, more sensitive, and more reliable than their precursors, high purchasing and running costs still make them a limiting factor in most laboratories like those of the Broad Institute. It is important to run those sequencers as efficiently as possible to reduce costs while producing robust assemblies. Polymer media for electrophoresis is the most important determinant for sequencing throughput. This thesis investigates the effect of polymer media on the performance of Applied Biosystems (ABI) 3730xl, the de-facto standard of DNA sequencers and develops analysis procedures for ABI3730xl system and its data. Due to its use in the human genome project (HGP), ABI has established a monopolistic position in the DNA-sequencing tool industry. As the de-facto standard of DNA sequencers ABI3730xl is highly automated, well-optimized, and black-boxed, despite the importance of higher throughput sequencing for diagnostic applications, third parties have found it difficult to improve sequencing methods. This thesis also conducts an analysis of the DNA-sequencing tool industry to discuss how ABI has established current monopolistic status, what kind of business model would be attractive for ABI in the post-HGP period, how new companies can successfully enter this industry, and how they can keep improving DNA-sequencing throughput along the line of "Moore's law". Thesis Supervisors: Roy E. Welsch Professor of Statistics and Management Science Patrick S. Doyle Assistant Professor of Chemical Engineering 2 Table of Contents Acknowledgements 5 1. Introduction 6 2. Background 8 2.1 Broad Institute Overview 8 2.2 Genome-sequencing Operation Overview 11 2.2.1 Operation Process 11 2.2.2 Genome-sequencing Technology 13 3. Improvement of the Electrophoretic Genome-sequencing Process 16 3.1 Introduction 16 3.2 Research History of Polymer Media for DNA-sequencing 18 3.2.1 Linear Water-Soluble Polymers 18 3.2.2 Thermo-Sensitive Polymers and Polymers with Higher-order Structure 22 3.2.3 Summary of Past Polymer Research 24 3.3 Experimental Section 25 3.3.1 Selection of Polymers 25 3.3.2 Capillary Electrophoresis 25 3.3.3 Chemical Analysis 26 3.4 Results and Discussions 28 3.4.1 Establishment of Experimental Protocol for Polymer Research 28 3.4.2 POP7 35 3.4.3 DMA 41 3.4.4 LPA 44 3.4.5 Chemical Analysis of POP7 47 3.4.6 Polymer Mixtures 52 3.5 Possible Approaches for the Future 55 3.6 Summary 57 3 4. Analysis of the Genome-Sequencing Tool Industry 58 4.1 Introduction 58 4.2 History of Genome-Sequencing Technology 58 4.3 Emergence of the Genome-Sequencing Tool Industry 63 4.4 Analysis of the Genome-Sequencing Tool Industry 65 4.4.1 Industry S-curves 65 4.4.2 Uniqueness and Complementary Assets to Create and Capture Value 66 4.4.3 Industry Structure - Present and Future 70 4.4.4 Value Chain and Boundaries 73 4.4.5 Strategy for the Future of ABI 74 4.5 Summary 75 5. Conclusion 76 4 Acknowledgements The author wishes to acknowledge the Leaders for Manufacturing Program for its support of this work. He would also like to thank Robert Nicol, Patrick Cahill, James Meldrim, Karen Foley and the group of Technology Development at the Broad Institute. Finally, he would like to thank his wife, Naoko, for her continuous support during his busy but fun days in Cambridge. 5 1. Introduction Huge technological advancements in information technology and a deeper understanding of biomaterials in the past twenty years have allowed for the discovery of the entire genetic information of humankind. The Whitehead Institute Center for Genomic Research was a primary contributor to this achievement. In the 1990s, during the Human Genome Project, its sequencing operation played a key role in rapidly improving genome-sequencing throughput. The Whitehead Institute has recently combined research efforts with the Massachusetts Institute of Technology (MIT) and Harvard University to form the Broad Institute. Even after the completion of the Human Genome Project in 2003, increased sequencing throughput at an affordable cost is critical to the realization of advanced and economical genomics-based medications. However, without tangible economical returns in the near future, research institutes and related industries in the genome-sequencing arena are evidently frustrated. Not only is the next incremental technological step necessary to move the field forward but also an appreciation for past and potential future balances of power in the arena would be enough to drive such a highly technology-driven industry toward future medical applications. The Broad Institute has improved throughput of genome-sequencing operations with an eye toward future healthcare applications. A primary bottleneck of the current sequencing operation is the capacity of the sequence detection process using the "Genome Sequencer," a key instrument in reading base code sequence for DNA. Many scientists and engineers in the Broad Institute are conducting research not only on multicapillary electrophoresis, the current sequencing technology, but also on next-generation technologies, to increase the capacity of the sequence detection process. This thesis is based on a Leaders for Manufacturing (LFM) internship at the Broad Institute, where the author worked with the genome sequencer in terms of both technological and business aspects. The author investigated polymer media of the current genome sequencer to improve its operation efficiency. He also conducted technology and 6 business analyses for the genome-sequencing tool industry and made attempt to forecast the future of the industry. The thesis proceeds as follows: Chapter 2, "Background," provides information on the Broad Institute as well as modem genome-sequencing technology. It concludes with a discussion of the detection phase of the genome-sequencing process, providing insight into the multicapillary electrophoresis procedure. Chapter 3, "Improvement of Electrophoretic Genome-sequencing Process," consists of the engineering portion of this thesis, investigating possibilities for improving the efficiency of current genome-sequencing. The discussion focuses on the role of polymer media in multicapillary electrophoresis technology. Chapter 4, "Analysis of the Genome-sequencing Tool Industry," examines the business perspective of genome-sequencing technology with an analysis of research history and the emergence of the genome-sequencing tool industry. The discussion includes how the monopoly status of Applied Biosystems, Inc. (ABI) has been successfully established, whether ABI's dominance will continue in the future, and how the industry can be developed in the future. Chapter 5, "Conclusion," ties the discussion of the preceding chapters together and offers some perspectives on how conclusions can be applied outside the field of genomics. 7 2. Background 2.1 Broad Institute Overview The Broad Institute is the collaborative research organization between MIT, Harvard University, and the Whitehead Institute; its official name is "The Eli and Edythe L. Broad Institute of MIT, Harvard University and its affiliated hospitals, and Whitehead Institute." In June 2003, philanthropists Eli & Edythe Broad of Los Angeles gave $100 million to create an institute with MIT, Harvard, and Whitehead to fulfill the genome's promise for medicine. The institute begin its activity later that same year. Figure 1 shows the mission statement of the Broad Institute. o Our scientific mission is: To create tools for genomics medicine and make them broadly available to the scientific community To apply these tools to propel the understanding and treatment of disease o Our organizational mission is: --- To enable collaborative projects
Recommended publications
  • Rpp2, an Essential Protein Subunit of Nuclear Rnase P, Is Required for Processing of Precursor Trnas and 35S Precursor Rrna in Saccharomyces Cerevisiae
    Proc. Natl. Acad. Sci. USA Vol. 95, pp. 6716–6721, June 1998 Biochemistry Rpp2, an essential protein subunit of nuclear RNase P, is required for processing of precursor tRNAs and 35S precursor rRNA in Saccharomyces cerevisiae VIKTOR STOLC*, ALEXANDER KATZ†, AND SIDNEY ALTMAN†‡ †Department of Biology, Yale University, New Haven, CT 06520; and *Department of Cell Biology, Yale University School of Medicine, New Haven, CT 06510 Contributed by Sidney Altman, March 31, 1998 ABSTRACT RPP2, an essential gene that encodes a 15.8- has been suggested that RNase P is an ancestor of RNase kDa protein subunit of nuclear RNase P, has been identified MRP, because RNase MRP has been found only in eukaryotes in the genome of Saccharomyces cerevisiae. Rpp2 was detected (20). Yeast RNase MRP functions in processing of precursor by sequence similarity with a human protein, Rpp20, which rRNAs at the A3 site in the internal transcribed sequence of copurifies with human RNase P. Epitope-tagged Rpp2 can be the 35S precursor rRNA (21) and also cleaves RNA primers found in association with both RNase P and RNase mitochon- for mitochondrial DNA replication (22, 23). Although RNase drial RNA processing in immunoprecipitates from crude MRP does not cleave ptRNAs in vitro, its role in rRNA extracts of cells. Depletion of Rpp2 protein in vivo causes processing is affected by proteins that associate with RNase P accumulation of precursor tRNAs with unprocessed introns in vivo (11–14). RNase P functions in the biosynthesis of and 5* and 3* termini, and leads to defects in the processing tRNAs (8) and appears to have a role in rRNA processing in of the 35S precursor rRNA.
    [Show full text]
  • Research Article Mouse Model Resources for Vision Research
    Hindawi Publishing Corporation Journal of Ophthalmology Volume 2011, Article ID 391384, 12 pages doi:10.1155/2011/391384 Research Article Mouse Model Resources for Vision Research Jungyeon Won, Lan Ying Shi, Wanda Hicks, Jieping Wang, Ronald Hurd, Jurgen¨ K. Naggert, Bo Chang, and Patsy M. Nishina The Jackson Laboratory, 600 Main Street, Bar Harbor, ME 04609, USA Correspondence should be addressed to Patsy M. Nishina, [email protected] Received 1 July 2010; Accepted 21 September 2010 Academic Editor: Radha Ayyagari Copyright © 2011 Jungyeon Won et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The need for mouse models, with their well-developed genetics and similarity to human physiology and anatomy, is clear and their central role in furthering our understanding of human disease is readily apparent in the literature. Mice carrying mutations that alter developmental pathways or cellular function provide model systems for analyzing defects in comparable human disorders and for testing therapeutic strategies. Mutant mice also provide reproducible, experimental systems for elucidating pathways of normal development and function. Two programs, the Eye Mutant Resource and the Translational Vision Research Models, focused on providing such models to the vision research community are described herein. Over 100 mutant lines from the Eye Mutant Resource and 60 mutant lines from the Translational Vision Research Models have been developed. The ocular diseases of the mutant lines include a wide range of phenotypes, including cataracts, retinal dysplasia and degeneration, and abnormal blood vessel formation.
    [Show full text]
  • Rpp1, an Essential Protein Subunit of Nuclear Rnase P Required for Processing of Precursor Trna and 35S Precursor Rrna in Saccharomyces Cerevisiae
    Downloaded from genesdev.cshlp.org on September 30, 2021 - Published by Cold Spring Harbor Laboratory Press Rpp1, an essential protein subunit of nuclear RNase P required for processing of precursor tRNA and 35S precursor rRNA in Saccharomyces cerevisiae Viktor Stolc1 and Sidney Altman2,3 1Department of Cell Biology, Yale University School of Medicine, New Haven, Connecticut 06510 USA; 2Department of Biology, Yale University, New Haven, Connecticut 06520 USA The gene for an essential protein subunit of nuclear RNase P from Saccharomyces cerevisiae has been cloned. The gene for this protein, RPP1, was identified by virtue of its homology with a human scleroderma autoimmune antigen, Rpp30, which copurifies with human RNase P. Epitope-tagged Rpp1 can be found in association with both RNase P RNA and a related endoribonuclease, RNase MRP RNA, in immunoprecipitates from crude extracts of cells. Depletion of Rpp1 in vivo leads to the accumulation of precursor tRNAs with unprocessed 5* and 3* termini and reveals rRNA processing defects that have not been described previously for proteins associated with RNase P or RNase MRP. Immunoprecipitated complexes cleave both yeast precursor tRNAs and precursor rRNAs. [Key Words: Rpp1; essential protein subunit; nuclear RNase P; S. cerevisiae; precursor tRNA; precursor rRNA] Received June 5, 1997; revised version accepted July 25, 1997. Ribonuclease P (RNase P) is a ubiquitous endoribonucle- limited. RNAse P isolated from human cells copurifies ase that consists of protein and RNA subunits. It cleaves with an RNA (H1; 340), and at least six proteins—Rpp14, 58-terminal leader sequences of precursor tRNAs (Darr et Rpp20, Rpp25, Rpp30, Rpp38, and Rpp40 (Eder et al.
    [Show full text]
  • CREB-Dependent Transcription in Astrocytes: Signalling Pathways, Gene Profiles and Neuroprotective Role in Brain Injury
    CREB-dependent transcription in astrocytes: signalling pathways, gene profiles and neuroprotective role in brain injury. Tesis doctoral Luis Pardo Fernández Bellaterra, Septiembre 2015 Instituto de Neurociencias Departamento de Bioquímica i Biologia Molecular Unidad de Bioquímica y Biologia Molecular Facultad de Medicina CREB-dependent transcription in astrocytes: signalling pathways, gene profiles and neuroprotective role in brain injury. Memoria del trabajo experimental para optar al grado de doctor, correspondiente al Programa de Doctorado en Neurociencias del Instituto de Neurociencias de la Universidad Autónoma de Barcelona, llevado a cabo por Luis Pardo Fernández bajo la dirección de la Dra. Elena Galea Rodríguez de Velasco y la Dra. Roser Masgrau Juanola, en el Instituto de Neurociencias de la Universidad Autónoma de Barcelona. Doctorando Directoras de tesis Luis Pardo Fernández Dra. Elena Galea Dra. Roser Masgrau In memoriam María Dolores Álvarez Durán Abuela, eres la culpable de que haya decidido recorrer el camino de la ciencia. Que estas líneas ayuden a conservar tu recuerdo. A mis padres y hermanos, A Meri INDEX I Summary 1 II Introduction 3 1 Astrocytes: physiology and pathology 5 1.1 Anatomical organization 6 1.2 Origins and heterogeneity 6 1.3 Astrocyte functions 8 1.3.1 Developmental functions 8 1.3.2 Neurovascular functions 9 1.3.3 Metabolic support 11 1.3.4 Homeostatic functions 13 1.3.5 Antioxidant functions 15 1.3.6 Signalling functions 15 1.4 Astrocytes in brain pathology 20 1.5 Reactive astrogliosis 22 2 The transcription
    [Show full text]
  • Microarray Bioinformatics and Its Applications to Clinical Research
    Microarray Bioinformatics and Its Applications to Clinical Research A dissertation presented to the School of Electrical and Information Engineering of the University of Sydney in fulfillment of the requirements for the degree of Doctor of Philosophy i JLI ··_L - -> ...·. ...,. by Ilene Y. Chen Acknowledgment This thesis owes its existence to the mercy, support and inspiration of many people. In the first place, having suffering from adult-onset asthma, interstitial cystitis and cold agglutinin disease, I would like to express my deepest sense of appreciation and gratitude to Professors Hong Yan and David Levy for harbouring me these last three years and providing me a place at the University of Sydney to pursue a very meaningful course of research. I am also indebted to Dr. Craig Jin, who has been a source of enthusiasm and encouragement on my research over many years. In the second place, for contexts concerning biological and medical aspects covered in this thesis, I am very indebted to Dr. Ling-Hong Tseng, Dr. Shian-Sehn Shie, Dr. Wen-Hung Chung and Professor Chyi-Long Lee at Change Gung Memorial Hospital and University of Chang Gung School of Medicine (Taoyuan, Taiwan) as well as Professor Keith Lloyd at University of Alabama School of Medicine (AL, USA). All of them have contributed substantially to this work. In the third place, I would like to thank Mrs. Inge Rogers and Mr. William Ballinger for their helpful comments and suggestions for the writing of my papers and thesis. In the fourth place, I would like to thank my swim coach, Hirota Homma.
    [Show full text]
  • Cell Cycle Arrest Through Indirect Transcriptional Repression by P53: I Have a DREAM
    Cell Death and Differentiation (2018) 25, 114–132 Official journal of the Cell Death Differentiation Association OPEN www.nature.com/cdd Review Cell cycle arrest through indirect transcriptional repression by p53: I have a DREAM Kurt Engeland1 Activation of the p53 tumor suppressor can lead to cell cycle arrest. The key mechanism of p53-mediated arrest is transcriptional downregulation of many cell cycle genes. In recent years it has become evident that p53-dependent repression is controlled by the p53–p21–DREAM–E2F/CHR pathway (p53–DREAM pathway). DREAM is a transcriptional repressor that binds to E2F or CHR promoter sites. Gene regulation and deregulation by DREAM shares many mechanistic characteristics with the retinoblastoma pRB tumor suppressor that acts through E2F elements. However, because of its binding to E2F and CHR elements, DREAM regulates a larger set of target genes leading to regulatory functions distinct from pRB/E2F. The p53–DREAM pathway controls more than 250 mostly cell cycle-associated genes. The functional spectrum of these pathway targets spans from the G1 phase to the end of mitosis. Consequently, through downregulating the expression of gene products which are essential for progression through the cell cycle, the p53–DREAM pathway participates in the control of all checkpoints from DNA synthesis to cytokinesis including G1/S, G2/M and spindle assembly checkpoints. Therefore, defects in the p53–DREAM pathway contribute to a general loss of checkpoint control. Furthermore, deregulation of DREAM target genes promotes chromosomal instability and aneuploidy of cancer cells. Also, DREAM regulation is abrogated by the human papilloma virus HPV E7 protein linking the p53–DREAM pathway to carcinogenesis by HPV.Another feature of the pathway is that it downregulates many genes involved in DNA repair and telomere maintenance as well as Fanconi anemia.
    [Show full text]
  • Comprehensive Analysis of 19Q12 Amplicon in Human Gastric Cancers
    Modern Pathology (2006) 19, 854–863 & 2006 USCAP, Inc All rights reserved 0893-3952/06 $30.00 www.modernpathology.org Comprehensive analysis of 19q12 amplicon in human gastric cancers Suet Yi Leung1, Coral Ho2, I-Ping Tu3, Rui Li4, Samuel So4, Kent-Man Chu5, Siu Tsan Yuen1 and Xin Chen2 1Department of Pathology, The University of Hong Kong, Queen Mary Hospital, Pokfulam, Hong Kong; 2Department of Biopharmaceutical Sciences, University of California, San Francisco, CA, USA; 3The Institute of Statistical Science, Acdemia Sinica, Taipei, Taiwan, ROC; 4Department of Surgery, Stanford University, Stanford, CA, USA and 5Department of Surgery, The University of Hong Kong, Queen Mary Hospital, Pokfulam, Hong Kong Amplification at 19q12 has been observed in multiple tumor types, while cyclin E1 (CCNE1) has been considered to be the key oncogene within this amplicon. We have previously applied cDNA microarray analysis to systematically characterize gene expression patterns of gastric tumor and nontumor samples. We identified a cluster of five tightly coregulated genes all located at chromosome 19q12, including CCNE1. We found that the 19q12 gene cluster is highly expressed in gastric tumors compared to nontumor gastric samples. Array based comparative genomic hybridization and real-time PCR was used to define the boundary of the 19q12 amplicon to a region of approximately 200 kb. Interestingly, we found that in some cases amplification at 19q12 was not associated with DNA copy number gain at CCNE1, suggesting that some other genes within the 19q12 amplicon may also have important function during gastric tumorigenesis. We found high expression of the 19q12 gene cluster to be statistically correlated with the cell proliferation gene signature.
    [Show full text]
  • Comparison of Human Chromosome 19Q13 and Syntenic Region On
    European Journal of Human Genetics (2010) 18, 442–447 & 2010 Macmillan Publishers Limited All rights reserved 1018-4813/10 $32.00 www.nature.com/ejhg ARTICLE Comparison of human chromosome 19q13 and syntenic region on mouse chromosome 7 reveals absence, in man, of 11.6 Mb containing four mouse calcium-sensing receptor-related sequences: relevance to familial benign hypocalciuric hypercalcaemia type 3 Fadil M Hannan1, M Andrew Nesbit1, Jeremy JO Turner1,2, Joanna M Stacey1, Luisella Cianferotti3, Paul T Christie1, Arthur D Conigrave4, Michael P Whyte5,6 and Rajesh V Thakker*,1 Familial benign hypocalciuric hypercalcaemia (FBHH) is a genetically heterogeneous disorder that consists of three designated types, FBHH1, FBHH2 and FBHH3, whose chromosomal locations are 3q21.1, 19p and 19q13, respectively. FBHH1 is caused by mutations of a calcium-sensing receptor (CaSR), but the abnormalities underlying FBHH2 and FBHH3 are unknown. FBHH3, also referred to as the Oklahoma variant (FBHHOk), has been mapped to a 12cM interval, flanked by D19S908 and D19S866. To refine the location of FBHH3, we pursued linkage studies using 24 polymorphic loci. Our results establish a linkage between FBHH3 and 17 of these loci, and indicate that FBHH3 is located in a 4.1 Mb region flanked centromerically by D19S112 and telomerically by rs245111, which in the syntenic region on mouse chromosome 7 contains four Casr-related sequences (Gprc2a-rss). However, human homologues of these Gprc2a-rss were not found and a comparative analysis of the 22.0 Mb human and 39.3 Mb mouse syntenic regions showed evolutionary conservation of two segments that were inverted with loss from the human genome of 11.6 Mb that contained the four Gprc2a-rss.
    [Show full text]
  • Thirty Loci Identified for Heart Rate Response to Exercise and Recovery
    ARTICLE DOI: 10.1038/s41467-018-04148-1 OPEN Thirty loci identified for heart rate response to exercise and recovery implicate autonomic nervous system Julia Ramírez 1,2, Stefan van Duijvenboden1,2, Ioanna Ntalla1, Borbala Mifsud1,3, Helen R Warren1,3, Evan Tzanis1,3, Michele Orini 4,5, Andrew Tinker1,3, Pier D. Lambiase2,4 & Patricia B. Munroe 1,3 Δ ex 1234567890():,; Impaired capacity to increase heart rate (HR) during exercise ( HR ), and a reduced rate of recovery post-exercise (ΔHRrec) are associated with higher cardiovascular mortality rates. Currently, the genetic basis of both phenotypes remains to be elucidated. We conduct genome-wide association studies (GWASs) for ΔHRex and ΔHRrec in ~40,000 individuals, followed by replication in ~27,000 independent samples, all from UK Biobank. Six and seven single-nucleotide polymorphisms for ΔHRex and ΔHRrec, respectively, formally replicate. In a full data set GWAS, eight further loci for ΔHRex and nine for ΔHRrec are genome-wide significant (P ≤ 5×10−8). In total, 30 loci are discovered, 8 being common across traits. Processes of neural development and modulation of adrenergic activity by the autonomic nervous system are enriched in these results. Our findings reinforce current understanding of HR response to exercise and recovery and could guide future studies evaluating its con- tribution to cardiovascular risk prediction. 1 Clinical Pharmacology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK. 2 Institute of Cardiovascular Science, University College London, London WC1E 6BT, UK. 3 NIHR Barts Cardiovascular Biomedical Research Centre, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK.
    [Show full text]
  • Determining the Causes of Recessive Retinal Dystrophy
    Determining the causes of recessive retinal dystrophy By Mohammed El-Sayed Mohammed El-Asrag BSc (hons), MSc (hons) Genetics and Molecular Biology Submitted in accordance with the requirements for the degree of Doctor of Philosophy The University of Leeds School of Medicine September 2016 The candidate confirms that the work submitted is his own, except where work which has formed part of jointly- authored publications has been included. The contribution of the candidate and the other authors to this work has been explicitly indicated overleaf. The candidate confirms that appropriate credit has been given within the thesis where reference has been made to the work of others. This copy has been supplied on the understanding that it is copyright material and that no quotation from the thesis may be published without proper acknowledgement. The right of Mohammed El-Sayed Mohammed El-Asrag to be identified as author of this work has been asserted by his in accordance with the Copyright, Designs and Patents Act 1988. © 2016 The University of Leeds and Mohammed El-Sayed Mohammed El-Asrag Jointly authored publications statement Chapter 3 (first results chapter) of this thesis is entirely the work of the author and appears in: Watson CM*, El-Asrag ME*, Parry DA, Morgan JE, Logan CV, Carr IM, Sheridan E, Charlton R, Johnson CA, Taylor G, Toomes C, McKibbin M, Inglehearn CF and Ali M (2014). Mutation screening of retinal dystrophy patients by targeted capture from tagged pooled DNAs and next generation sequencing. PLoS One 9(8): e104281. *Equal first- authors. Shevach E, Ali M, Mizrahi-Meissonnier L, McKibbin M, El-Asrag ME, Watson CM, Inglehearn CF, Ben-Yosef T, Blumenfeld A, Jalas C, Banin E and Sharon D (2015).
    [Show full text]
  • S41467-019-13965-X.Pdf
    ARTICLE https://doi.org/10.1038/s41467-019-13965-x OPEN Genome-wide CRISPR screen identifies host dependency factors for influenza A virus infection Bo Li1,2, Sara M. Clohisey 3, Bing Shao Chia1,2, Bo Wang 3, Ang Cui2,4, Thomas Eisenhaure2, Lawrence D. Schweitzer2, Paul Hoover2, Nicholas J. Parkinson3, Aharon Nachshon 5, Nikki Smith3, Tim Regan 3, David Farr3, Michael U. Gutmann6, Syed Irfan Bukhari7, Andrew Law 3, Maya Sangesland8, Irit Gat-Viks2,5, Paul Digard 3, Shobha Vasudevan7, Daniel Lingwood8, David H. Dockrell9, John G. Doench 2, J. Kenneth Baillie 3,10* & Nir Hacohen 2,11* 1234567890():,; Host dependency factors that are required for influenza A virus infection may serve as therapeutic targets as the virus is less likely to bypass them under drug-mediated selection pressure. Previous attempts to identify host factors have produced largely divergent results, with few overlapping hits across different studies. Here, we perform a genome-wide CRISPR/ Cas9 screen and devise a new approach, meta-analysis by information content (MAIC) to systematically combine our results with prior evidence for influenza host factors. MAIC out- performs other meta-analysis methods when using our CRISPR screen as validation data. We validate the host factors, WDR7, CCDC115 and TMEM199, demonstrating that these genes are essential for viral entry and regulation of V-type ATPase assembly. We also find that CMTR1, a human mRNA cap methyltransferase, is required for efficient viral cap snatching and regulation of a cell autonomous immune response, and provides synergistic protection with the influenza endonuclease inhibitor Xofluza. 1 Harvard University Virology Program, Harvfvard Medical School, Boston MA02142, USA.
    [Show full text]
  • Driver Mutations of the Adenoma-Carcinoma Sequence Govern the Intestinal Epithelial Global Translational Capacity
    Driver mutations of the adenoma-carcinoma sequence govern the intestinal epithelial global translational capacity Wouter Laurentius Smita, Claudia Nanette Spaana, Ruben Johannes de Boera, Prashanthi Rameshb,c, Tânia Martins Garciaa, Bartolomeus Joannes Meijera, Jacqueline Ludovicus Maria Vermeulena, Marco Lezzerinid, Alyson Winfried MacInnesd, Jan Kostere, Jan Paul Medemab,c, Gijs Robert van den Brinka,f, Vanesa Muncana, and Jarom Heijmansa,g,1 aDepartment of Gastroenterology and Hepatology, Tytgat Institute for Liver and Intestinal Research, Amsterdam University Medical Center, University of Amsterdam, 1105 BK Amsterdam, The Netherlands; bLaboratory for Experimental Oncology and Radiobiology, Center for Experimental and Molecular Medicine, Cancer Center Amsterdam, Amsterdam University Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; cOncode Institute, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; dLaboratory for Genetic Metabolic Diseases, Amsterdam University Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; eDepartment of Oncogenomics, Amsterdam University Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; fRoche Innovation Center Basel, F. Hoffmann-La Roche AG, 4070 Basel, Switzerland; and gDepartment of Internal Medicine and Hematology, Amsterdam University Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands Edited by Napoleone Ferrara, University of California San Diego, La Jolla, CA, and approved August 26, 2020 (received for review July 25, 2019) Deregulated global mRNA translation is an emerging feature of (4), ribosomal proteins and ribosomal RNA (rRNA) (5), and the cancer cells. Oncogenic transformation in colorectal cancer (CRC) is presence of oncogenes such as PIK3CA and c-MYC, that modu- driven by mutations in APC, KRAS, SMAD4, and TP53, known as late translational control (6).
    [Show full text]