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Bockerstett KA, Lewis SA, Noto CN, Ford EL, Saenz JB, Jackson NM, Ahn TH, Mills JC, DiPaolo RJ. Single-Cell Transcriptional Analyses Identify Lineage-Specific Epithelial Responses to Inflammation and Metaplastic Development in the Gastric Corpus. Gastroenterology 2020; 159:2116-2129.e4. [PMID: 32835664 PMCID: PMC7725914 DOI: 10.1053/j.gastro.2020.08.027] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [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: 02/03/2020] [Revised: 08/13/2020] [Accepted: 08/15/2020] [Indexed: 12/17/2022]
Abstract
BACKGROUND & AIMS Chronic atrophic gastritis can lead to gastric metaplasia and increase risk of gastric adenocarcinoma. Metaplasia is a precancerous lesion associated with an increased risk for carcinogenesis, but the mechanism(s) by which inflammation induces metaplasia are poorly understood. We investigated transcriptional programs in mucous neck cells and chief cells as they progress to metaplasia mice with chronic gastritis. METHODS We analyzed previously generated single-cell RNA-sequencing (scRNA-seq) data of gastric corpus epithelium to define transcriptomes of individual epithelial cells from healthy BALB/c mice (controls) and TxA23 mice, which have chronically inflamed stomachs with metaplasia. Chronic gastritis was induced in B6 mice by Helicobacter pylori infection. Gastric tissues from mice and human patients were analyzed by immunofluorescence to verify findings at the protein level. Pseudotime trajectory analysis of scRNA-seq data was used to predict differentiation of normal gastric epithelium to metaplastic epithelium in chronically inflamed stomachs. RESULTS Analyses of gastric epithelial transcriptomes revealed that gastrokine 3 (Gkn3) mRNA is a specific marker of mouse gastric corpus metaplasia (spasmolytic polypeptide expressing metaplasia, SPEM). Gkn3 mRNA was undetectable in healthy gastric corpus; its expression in chronically inflamed stomachs (from TxA23 mice and mice with Helicobacter pylori infection) identified more metaplastic cells throughout the corpus than previously recognized. Staining of healthy and diseased human gastric tissue samples paralleled these results. Although mucous neck cells and chief cells from healthy stomachs each had distinct transcriptomes, in chronically inflamed stomachs, these cells had distinct transcription patterns that converged upon a pre-metaplastic pattern, which lacked the metaplasia-associated transcripts. Finally, pseudotime trajectory analysis confirmed the convergence of mucous neck cells and chief cells into a pre-metaplastic phenotype that ultimately progressed to metaplasia. CONCLUSIONS In analyses of tissues from chronically inflamed stomachs of mice and humans, we expanded the definition of gastric metaplasia to include Gkn3 mRNA and GKN3-positive cells in the corpus, allowing a more accurate assessment of SPEM. Under conditions of chronic inflammation, chief cells and mucous neck cells are plastic and converge into a pre-metaplastic cell type that progresses to metaplasia.
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Affiliation(s)
- Kevin A. Bockerstett
- Department of Molecular Microbiology & Immunology, Saint Louis University School of Medicine, Saint Louis, MO, USA
| | - Scott A. Lewis
- Program of Bioinformatics and Computational Biology, Department of Computer Science, Saint Louis University, Saint Louis, MO, USA
| | - Christine N. Noto
- Department of Molecular Microbiology & Immunology, Saint Louis University School of Medicine, Saint Louis, MO, USA
| | - Eric L. Ford
- Department of Molecular Microbiology & Immunology, Saint Louis University School of Medicine, Saint Louis, MO, USA
| | - José B. Saenz
- Division of Gastroenterology, Departments of Medicine, Pathology & Immunology, Developmental Biology, Washington University School of Medicine, Saint Louis, MO, USA
| | - Nicholas M. Jackson
- Department of Molecular Microbiology & Immunology, Saint Louis University School of Medicine, Saint Louis, MO, USA
| | - Tae-Hyuk Ahn
- Program of Bioinformatics and Computational Biology, Department of Computer Science, Saint Louis University, Saint Louis, MO, USA
| | - Jason C. Mills
- Division of Gastroenterology, Departments of Medicine, Pathology & Immunology, Developmental Biology, Washington University School of Medicine, Saint Louis, MO, USA
| | - Richard J. DiPaolo
- Department of Molecular Microbiology & Immunology, Saint Louis University School of Medicine, Saint Louis, MO, USA
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Bockerstett KA, Lewis SA, Wolf KJ, Noto CN, Jackson NM, Ford EL, Ahn TH, DiPaolo RJ. Single-cell transcriptional analyses of spasmolytic polypeptide-expressing metaplasia arising from acute drug injury and chronic inflammation in the stomach. Gut 2020; 69:1027-1038. [PMID: 31481545 PMCID: PMC7282188 DOI: 10.1136/gutjnl-2019-318930] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 08/21/2019] [Accepted: 08/25/2019] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Spasmolytic polypeptide-expressing metaplasia (SPEM) is a regenerative lesion in the gastric mucosa and is a potential precursor to intestinal metaplasia/gastric adenocarcinoma in a chronic inflammatory setting. The goal of these studies was to define the transcriptional changes associated with SPEM at the individual cell level in response to acute drug injury and chronic inflammatory damage in the gastric mucosa. DESIGN Epithelial cells were isolated from the gastric corpus of healthy stomachs and stomachs with drug-induced and inflammation-induced SPEM lesions. Single cell RNA sequencing (scRNA-seq) was performed on tissue samples from each of these settings. The transcriptomes of individual epithelial cells from healthy, acutely damaged and chronically inflamed stomachs were analysed and compared. RESULTS scRNA-seq revealed a population Mucin 6 (Muc6)+gastric intrinsic factor (Gif)+ cells in healthy tissue, but these cells did not express transcripts associated with SPEM. Furthermore, analyses of SPEM cells from drug injured and chronically inflamed corpus yielded two major findings: (1) SPEM and neck cell hyperplasia/hypertrophy are nearly identical in the expression of SPEM-associated transcripts and (2) SPEM programmes induced by drug-mediated parietal cell ablation and chronic inflammation are nearly identical, although the induction of transcripts involved in immunomodulation was unique to SPEM cells in the chronic inflammatory setting. CONCLUSIONS These data necessitate an expansion of the definition of SPEM to include Tff2+Muc6+ cells that do not express mature chief cell transcripts such as Gif. Our data demonstrate that SPEM arises by a highly conserved cellular programme independent of aetiology and develops immunoregulatory capabilities in a setting of chronic inflammation.
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Affiliation(s)
- Kevin A Bockerstett
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, USA
| | - Scott A Lewis
- Department of Computer Science, Saint Louis University, Saint Louis, Missouri, USA
| | - Kyle J Wolf
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, USA
| | - Christine N Noto
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, USA
| | - Nicholas M Jackson
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, USA
| | - Eric L Ford
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, USA
| | - Tae-Hyuk Ahn
- Department of Computer Science, Saint Louis University, Saint Louis, Missouri, USA
| | - Richard J DiPaolo
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, USA
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3
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Terry EE, Zhang X, Hoffmann C, Hughes LD, Lewis SA, Li J, Wallace MJ, Riley LA, Douglas CM, Gutierrez-Monreal MA, Lahens NF, Gong MC, Andrade F, Esser KA, Hughes ME. Transcriptional profiling reveals extraordinary diversity among skeletal muscle tissues. eLife 2018; 7:34613. [PMID: 29809149 PMCID: PMC6008051 DOI: 10.7554/elife.34613] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 05/15/2018] [Indexed: 11/24/2022] Open
Abstract
Skeletal muscle comprises a family of diverse tissues with highly specialized functions. Many acquired diseases, including HIV and COPD, affect specific muscles while sparing others. Even monogenic muscular dystrophies selectively affect certain muscle groups. These observations suggest that factors intrinsic to muscle tissues influence their resistance to disease. Nevertheless, most studies have not addressed transcriptional diversity among skeletal muscles. Here we use RNAseq to profile mRNA expression in skeletal, smooth, and cardiac muscle tissues from mice and rats. Our data set, MuscleDB, reveals extensive transcriptional diversity, with greater than 50% of transcripts differentially expressed among skeletal muscle tissues. We detect mRNA expression of hundreds of putative myokines that may underlie the endocrine functions of skeletal muscle. We identify candidate genes that may drive tissue specialization, including Smarca4, Vegfa, and Myostatin. By demonstrating the intrinsic diversity of skeletal muscles, these data provide a resource for studying the mechanisms of tissue specialization. About 40% of our weight is formed of skeletal muscles, the hundreds of muscles in our bodies that can be voluntarily controlled by our nervous system. At the moment, the research community largely sees all these muscles as a single group whose tissues are virtually interchangeable. Yet, skeletal muscles have highly diverse origins, shapes and roles. For example, our diaphragm is a long muscle that contracts slowly and rhythmically so we can draw breaths, while tiny muscles in our eyes generate the short and precise movements of our eyeballs. Different skeletal muscles also respond in distinct ways to injuries, drugs and diseases. This suggests that these muscles may be diverse at the genetic level. While all the cells in our body have the same genetic information, exactly which genes are turned on and off (or ‘expressed’) changes between types of cells. On top of this ‘on or off’ regulation, the level of expression of a gene – how active it is – can also differ. However, the studies that examine the differences in gene expression between tissues usually overlook skeletal muscles. Here, Terry et al. use genetic techniques to measure how genes are expressed in over 20 types of muscle in mice and rats. The results show that the expression levels of over 50% of all the animals’ genes vary between muscles. In fact, any two types of muscles express on average 13% of their genes differently from each other. The analyses yield further unexpected findings. For example, the expression levels in a muscle in the foot that helps to flex the rodents’ toes are more similar to those found in eye muscles than to the ones observed in limb muscles. These conclusions indicate that skeletal muscles are a widely diverse family of tissues. The research community will be able to use the data collected by Terry et al. to explore further the origins and the consequences of the differences between skeletal muscles. This could help researchers to understand why specific groups of muscles are more susceptible to disease, or react differently to a drug. This knowledge could also be exploited to refine approaches in tissue engineering, which aims to replace damaged muscles in the body.
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Affiliation(s)
- Erin E Terry
- Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, United States
| | - Xiping Zhang
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, United States
| | - Christy Hoffmann
- Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, United States
| | - Laura D Hughes
- Department of Integrative, Structural and Computational Biology, The Scripps Research Institute, La Jolla, United States
| | - Scott A Lewis
- Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, United States
| | - Jiajia Li
- Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, United States
| | - Matthew J Wallace
- Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, United States
| | - Lance A Riley
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, United States
| | - Collin M Douglas
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, United States
| | - Miguel A Gutierrez-Monreal
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, United States
| | - Nicholas F Lahens
- Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, United States
| | - Ming C Gong
- Department of Physiology, University of Kentucky School of Medicine, Lexington, United States
| | - Francisco Andrade
- Department of Physiology, University of Kentucky School of Medicine, Lexington, United States
| | - Karyn A Esser
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, United States
| | - Michael E Hughes
- Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, United States
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4
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Hughes ME, Abruzzi KC, Allada R, Anafi R, Arpat AB, Asher G, Baldi P, de Bekker C, Bell-Pedersen D, Blau J, Brown S, Ceriani MF, Chen Z, Chiu JC, Cox J, Crowell AM, DeBruyne JP, Dijk DJ, DiTacchio L, Doyle FJ, Duffield GE, Dunlap JC, Eckel-Mahan K, Esser KA, FitzGerald GA, Forger DB, Francey LJ, Fu YH, Gachon F, Gatfield D, de Goede P, Golden SS, Green C, Harer J, Harmer S, Haspel J, Hastings MH, Herzel H, Herzog ED, Hoffmann C, Hong C, Hughey JJ, Hurley JM, de la Iglesia HO, Johnson C, Kay SA, Koike N, Kornacker K, Kramer A, Lamia K, Leise T, Lewis SA, Li J, Li X, Liu AC, Loros JJ, Martino TA, Menet JS, Merrow M, Millar AJ, Mockler T, Naef F, Nagoshi E, Nitabach MN, Olmedo M, Nusinow DA, Ptáček LJ, Rand D, Reddy AB, Robles MS, Roenneberg T, Rosbash M, Ruben MD, Rund SSC, Sancar A, Sassone-Corsi P, Sehgal A, Sherrill-Mix S, Skene DJ, Storch KF, Takahashi JS, Ueda HR, Wang H, Weitz C, Westermark PO, Wijnen H, Xu Y, Wu G, Yoo SH, Young M, Zhang EE, Zielinski T, Hogenesch JB. Guidelines for Genome-Scale Analysis of Biological Rhythms. J Biol Rhythms 2017; 32:380-393. [PMID: 29098954 PMCID: PMC5692188 DOI: 10.1177/0748730417728663] [Citation(s) in RCA: 155] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Genome biology approaches have made enormous contributions to our understanding of biological rhythms, particularly in identifying outputs of the clock, including RNAs, proteins, and metabolites, whose abundance oscillates throughout the day. These methods hold significant promise for future discovery, particularly when combined with computational modeling. However, genome-scale experiments are costly and laborious, yielding “big data” that are conceptually and statistically difficult to analyze. There is no obvious consensus regarding design or analysis. Here we discuss the relevant technical considerations to generate reproducible, statistically sound, and broadly useful genome-scale data. Rather than suggest a set of rigid rules, we aim to codify principles by which investigators, reviewers, and readers of the primary literature can evaluate the suitability of different experimental designs for measuring different aspects of biological rhythms. We introduce CircaInSilico, a web-based application for generating synthetic genome biology data to benchmark statistical methods for studying biological rhythms. Finally, we discuss several unmet analytical needs, including applications to clinical medicine, and suggest productive avenues to address them.
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Affiliation(s)
- Michael E Hughes
- 1 Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Katherine C Abruzzi
- 2 Department of Biology and Howard Hughes Medical Institute, Brandeis University, Waltham, Massachusetts, USA
| | - Ravi Allada
- 3 Department of Neurobiology, Northwestern University, Evanston, Illinois, USA
| | - Ron Anafi
- 4 Division of Sleep Medicine, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, USA
| | - Alaaddin Bulak Arpat
- 5 Center for Integrative Genomics, Génopode, University of Lausanne, Lausanne, Switzerland.,6 Vital-IT, Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Gad Asher
- 7 Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Pierre Baldi
- 8 Institute for Genomics and Bioinformatics, University of California, Irvine, USA
| | | | | | - Justin Blau
- 11 Department of Biology, New York University, New York, USA
| | - Steve Brown
- 12 Institute of Pharmacology and Toxicology, University of Zürich, Switzerland
| | - M Fernanda Ceriani
- 13 Laboratorio de Genética del Comportamiento, Fundación Instituto Leloir, IIBBA-CONICET, Buenos Aires, Argentina
| | - Zheng Chen
- 14 Department of Biochemistry and Molecular Biology, University of Texas Health Science Center, Houston, USA
| | - Joanna C Chiu
- 15 Department of Entomology and Nematology, University of California, Davis, USA
| | - Juergen Cox
- 16 Computational Systems Biochemistry, Max-Planck Institute of Biochemistry, Martinsried, Germany
| | - Alexander M Crowell
- 17 Department of Molecular and Systems Biology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Jason P DeBruyne
- 18 Department of Pharmacology and Toxicology, Morehouse School of Medicine, Atlanta, Georgia, USA
| | - Derk-Jan Dijk
- 19 Surrey Sleep Research Centre, University of Surrey, Guildford, UK
| | - Luciano DiTacchio
- 20 The University of Kansas Medical Center, University of Kansas, Kansas City, USA
| | - Francis J Doyle
- 21 John A. Paulson School of Engineering and Applied Sciences, Harvard University, Boston, Massachusetts, USA
| | - Giles E Duffield
- 22 Department of Biological Sciences and Eck Institute for Global Health, University of Notre Dame, Notre Dame, Indiana, USA
| | - Jay C Dunlap
- 17 Department of Molecular and Systems Biology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Kristin Eckel-Mahan
- 23 Institute of Molecular Medicine, McGovern Medical School, UT Health Houston, Houston, Texas, USA
| | - Karyn A Esser
- 24 Department of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, USA
| | - Garret A FitzGerald
- 25 Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, USA
| | - Daniel B Forger
- 26 Department of Mathematics, University of Michigan, Ann Arbor, USA
| | - Lauren J Francey
- 27 Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Ying-Hui Fu
- 28 Kavli Institute for Fundamental Neuroscience, Weill Institute of Neuroscience, Department of Neurology, University of California, San Francisco, USA
| | - Frédéric Gachon
- 29 Department of Diabetes and Circadian Rhythms, Nestlé Institute of Health Sciences, Lausanne, Switzerland
| | - David Gatfield
- 5 Center for Integrative Genomics, Génopode, University of Lausanne, Lausanne, Switzerland
| | - Paul de Goede
- 30 Department of Endocrinology & Metabolism, Academic Medical Center, Amsterdam, the Netherlands
| | - Susan S Golden
- 31 Center for Circadian Biology and Division of Biological Sciences, University of California, San Diego, La Jolla, USA
| | - Carla Green
- 32 Department of Neuroscience, University of Texas Southwestern Medical Center, Dallas, USA
| | - John Harer
- 33 Department of Mathematics, Duke University, Durham, North Carolina, USA
| | - Stacey Harmer
- 34 Department of Plant Biology, University of California, Davis, USA
| | - Jeff Haspel
- 1 Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Michael H Hastings
- 35 Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
| | - Hanspeter Herzel
- 36 Institute for Theoretical Biology, Charité-Universitätsmedizin Berlin, Germany
| | - Erik D Herzog
- 37 Department of Biology, Washington University in St. Louis, Missouri, USA
| | - Christy Hoffmann
- 1 Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Christian Hong
- 27 Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Jacob J Hughey
- 38 Department of Biomedical Informatics, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Jennifer M Hurley
- 39 Department of Biological Sciences, Rensselaer Polytechnic Institute, Troy, New York, USA
| | | | - Carl Johnson
- 41 Department of Biological Sciences, Vanderbilt University, Nashville, Tennessee, USA
| | - Steve A Kay
- 42 Department of Cell and Molecular Biology, The Scripps Research Institute, University of California, San Diego, La Jolla, USA
| | - Nobuya Koike
- 43 Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine, Japan
| | - Karl Kornacker
- 44 Division of Sensory Biophysics, The Ohio State University, Columbus, USA
| | - Achim Kramer
- 45 Laboratory of Chronobiology, Charité Universitätsmedizin Berlin, Germany
| | - Katja Lamia
- 46 Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California, USA
| | - Tanya Leise
- 47 Department of Mathematics and Statistics, Amherst College, Amherst, Massachusetts, USA
| | - Scott A Lewis
- 1 Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Jiajia Li
- 1 Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, Missouri, USA.,48 Department of Biology, University of Missouri-St. Louis, USA
| | - Xiaodong Li
- 49 Department of Cell Biology, College of Life Sciences at Wuhan University, China
| | - Andrew C Liu
- 50 Department of Biological Sciences, University of Memphis, Tennessee, USA
| | - Jennifer J Loros
- 51 Department of Biochemistry and Cell Biology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Tami A Martino
- 52 Centre for Cardiovascular Investigations, Department of Biomedical Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Jerome S Menet
- 10 Department of Biology, Texas A&M University, College Station, USA
| | - Martha Merrow
- 53 Institute of Medical Psychology, Faculty of Medicine, LMU Munich, Germany
| | - Andrew J Millar
- 54 SynthSys and School of Biological Sciences, University of Edinburgh, UK
| | - Todd Mockler
- 55 Donald Danforth Plant Science Center, St. Louis, Missouri, USA
| | - Felix Naef
- 56 The Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Switzerland
| | - Emi Nagoshi
- 57 Department of Genetics and Evolution, University of Geneva, Switzerland
| | - Michael N Nitabach
- 58 Department of Cellular and Molecular Physiology, Department of Genetics, Kavli Institute for Neuroscience, Yale School of Medicine, New Haven, Connecticut, USA
| | - Maria Olmedo
- 59 Department of Genetics, University of Seville, Spain
| | - Dmitri A Nusinow
- 55 Donald Danforth Plant Science Center, St. Louis, Missouri, USA
| | - Louis J Ptáček
- 60 Department of Neurology, University of California, San Francisco, USA
| | - David Rand
- 61 Warwick Systems Biology and Mathematics Institute, University of Warwick, Conventry, UK
| | - Akhilesh B Reddy
- 62 The Francis Crick Institute, London, UK, and UCL Institute of Neurology, Queen Square, London, UK
| | - Maria S Robles
- 53 Institute of Medical Psychology, Faculty of Medicine, LMU Munich, Germany
| | - Till Roenneberg
- 53 Institute of Medical Psychology, Faculty of Medicine, LMU Munich, Germany
| | - Michael Rosbash
- 2 Department of Biology and Howard Hughes Medical Institute, Brandeis University, Waltham, Massachusetts, USA
| | - Marc D Ruben
- 27 Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Samuel S C Rund
- 63 Centre for Immunity, Infection and Evolution, University of Edinburgh, UK
| | - Aziz Sancar
- 64 Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, USA
| | - Paolo Sassone-Corsi
- 65 Department of Biological Chemistry, Center for Epigenetics and Metabolism, University of California, Irvine, USA
| | - Amita Sehgal
- 66 Howard Hughes Medical Institute, University of Pennsylvania Perelman School of Medicine, Philadelphia, USA
| | - Scott Sherrill-Mix
- 67 Department of Microbiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, USA
| | - Debra J Skene
- 68 Chronobiology, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Kai-Florian Storch
- 69 Department of Psychiatry, Douglas Mental Health University Institute, McGill University, Montreal, Canada
| | - Joseph S Takahashi
- 70 Howard Hughes Medical Institute, Department of Neuroscience, University of Texas Southwestern Medical Center, Dallas, USA
| | - Hiroki R Ueda
- 71 Department of Systems Pharmacology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan Laboratory for Synthetic Biology, RIKEN Quantitative Biology Center, Osaka, Japan
| | - Han Wang
- 72 Center for Circadian Clocks, Soochow University, Suzhou, Jiangsu, China
| | - Charles Weitz
- 73 Department of Neurobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Pål O Westermark
- 74 Institute of Genetics and Biometry, Leibniz Institute for Farm Animal Biology, Dummerstorf, Germany
| | - Herman Wijnen
- 75 Biological Sciences and Institute for Life Sciences, University of Southampton, UK
| | - Ying Xu
- 76 Cam-Su GRC, Soochow University, Suzhou, China
| | - Gang Wu
- 27 Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Seung-Hee Yoo
- 14 Department of Biochemistry and Molecular Biology, University of Texas Health Science Center, Houston, USA
| | - Michael Young
- 77 Laboratory of Genetics, Rockefeller University, New York, New York, USA
| | | | - Tomasz Zielinski
- 54 SynthSys and School of Biological Sciences, University of Edinburgh, UK
| | - John B Hogenesch
- 27 Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
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5
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Abstract
RNA-sequencing (RNA-seq) and microarrays are methods for measuring gene expression across the entire transcriptome. Recent advances have made these techniques practical and affordable for essentially any laboratory with experience in molecular biology. A variety of computational methods have been developed to decrease the amount of bioinformatics expertise necessary to analyze these data. Nevertheless, many barriers persist which discourage new labs from using functional genomics approaches. Since high-quality gene expression studies have enduring value as resources to the entire research community, it is of particular importance that small labs have the capacity to share their analyzed datasets with the research community. Here we introduce ExpressionDB, an open source platform for visualizing RNA-seq and microarray data accommodating virtually any number of different samples. ExpressionDB is based on Shiny, a customizable web application which allows data sharing locally and online with customizable code written in R. ExpressionDB allows intuitive searches based on gene symbols, descriptions, or gene ontology terms, and it includes tools for dynamically filtering results based on expression level, fold change, and false-discovery rates. Built-in visualization tools include heatmaps, volcano plots, and principal component analysis, ensuring streamlined and consistent visualization to all users. All of the scripts for building an ExpressionDB with user-supplied data are freely available on GitHub, and the Creative Commons license allows fully open customization by end-users. We estimate that a demo database can be created in under one hour with minimal programming experience, and that a new database with user-supplied expression data can be completed and online in less than one day.
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Affiliation(s)
- Laura D. Hughes
- Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Scott A. Lewis
- Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Michael E. Hughes
- Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, Missouri, United States of America
- * E-mail:
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6
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Abstract
The alpha-beta tubulin heterodimer is the subunit from which microtubules are assembled. The pathway leading to correctly folded alpha- and beta-tubulins is unusually complex: it involves cycles of ATP-dependent interaction of newly synthesized tubulin subunits with cytosolic chaperonin, resulting in the production of quasi-native folding intermediates, which must then be acted upon by additional protein cofactors. These cofactors form a supercomplex containing both alpha- and beta-tubulin polypeptides, from which native heterodimer is released in a GTP-dependent reaction. Here, we discuss the current state of our understanding of the function of cytosolic chaperonin and cofactors in tubulin folding.
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7
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Veillon C, Lewis SA, Patterson KY. A bovine serum reference material for major, minor and trace elements. Acta Pharmacol Toxicol (Copenh) 2009; 59 Suppl 7:573-6. [PMID: 3776627 DOI: 10.1111/j.1600-0773.1986.tb02828.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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8
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Fogarty AW, Antoniak M, Venn AJ, Davies L, Goodwin A, Salfield N, Britton JR, Lewis SA. A natural experiment on the impact of fruit supplementation on asthma symptoms in children. Eur Respir J 2009; 33:481-5. [PMID: 19213783 DOI: 10.1183/09031936.00162907] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A high fruit intake may reduce the risk of asthma. The English National School Fruit Scheme was introduced in the East Midlands region of the UK in June 2003 and in the Eastern region in September 2004. Questionnaires were distributed to children aged 4-6 yrs in schools in May 2003. This was repeated in May 2004 when those in the East Midlands had received free fruit for 1 yr and those in the Eastern region had not. Responses were obtained in 2004 for 4,971 (53%) and 5,770 (54%) children in the intervention and control regions, respectively. Despite an increase in fruit consumption in the intervention compared with the control region between 2003 and 2004, there was no difference between the two regions in the prevalence or severity of asthma symptoms after 1 yr of fruit supplementation (odds ratio for wheeze in the past 12 months in intervention compared with control region 1.00, 95% confidence interval 0.88-1.14). Providing free fruit at school for 1 yr does not have any immediate effect on prevalence or severity of asthma in young children, although these data do not refute the hypothesis that a higher increase in fruit intake improves measures of asthma control.
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Affiliation(s)
- A W Fogarty
- Division of Epidemiology and Public Health, Univerisity of Nottingham, NG5 1PB, UK.
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9
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Tata LJ, Lewis SA, McKeever TM, Smith CJP, Doyle P, Smeeth L, Gibson JE, Hubbard RB. Effect of maternal asthma, exacerbations and asthma medication use on congenital malformations in offspring: a UK population-based study. Thorax 2008; 63:981-7. [PMID: 18678701 DOI: 10.1136/thx.2008.098244] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND Clinical advice to pregnant women with asthma is to maintain optimal therapeutic management; however, potential adverse effects of asthma treatments on fetal development remain uncertain. A study was undertaken to assess the association between maternal asthma and gestational exposure to asthma medications with risk of congenital malformation in offspring. METHODS A matched case-control study was performed using The Health Improvement Network primary care database. Children with malformations were matched to control children on birth year, general practice and singleton or twin delivery. RESULTS 5124 cases of liveborn children with major congenital malformations and 30,053 controls were included in the study. The risk of any malformation in children born to women with asthma was marginally higher than that in children born to women without asthma (adjusted OR 1.10, 95% CI 1.01 to 1.20). However, no association was present in children born to mothers receiving asthma treatment in the year before or during pregnancy (OR 1.06, 95% CI 0.94 to 1.20). In assessing teratogenicity of medications, no increased risk of malformation was found with gestational exposures to short- or long-acting beta agonists, inhaled corticosteroids, oral corticosteroids, other bronchodilators or cromones. These findings were similar for each of 11 system-specific malformation groups, except for an increase in musculo-skeletal system malformation associated with cromone exposure. CONCLUSIONS Gestational exposure to commonly used asthma medications was found to be safe overall, although a moderate teratogenic risk of cromones cannot be excluded. There was some evidence of a small increased risk of congenital malformation in children born to women with asthma, but this was not explained by gestational exposure to asthma drugs.
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Affiliation(s)
- L J Tata
- Epidemiology & Public Health, University of Nottingham, UK.
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10
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McKeever TM, Lewis SA, Cassano PA, Ocké M, Burney P, Britton J, Smit HA. The relation between dietary intake of individual fatty acids, FEV1 and respiratory disease in Dutch adults. Thorax 2007; 63:208-14. [PMID: 17901161 PMCID: PMC3979330 DOI: 10.1136/thx.2007.090399] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND A reduced dietary intake of n-3 fatty acids, in association with increased n-6 fatty acid intake, has been proposed as a potential aetiological factor for chronic obstructive pulmonary disease (COPD) and asthma. However, the relative importance of individual fatty acids within the n-3 and n-6 categories on this effect has not been widely investigated. We have studied the relation between individual fatty acid intakes, lung function and self-reported respiratory symptoms and diagnoses in a representative sample of more than 13,000 Dutch adults. METHODS Intake of individual fatty acids was estimated by a food frequency questionnaire and analysed in relation to measures of forced expiratory volume in 1 s (FEV1) and to questionnaire reported wheeze, asthma and COPD symptoms. RESULTS After adjusting for confounding, we found no protective association between individual n-3 fatty acid intakes and FEV1. Higher intakes of some n-6 fatty acids were associated with lower FEV1, this effect being most marked for c22:4 n-6 docosatetraenoic acid (reduction in FEV1 between the highest and lowest quintile of intake 54.5 ml (95% CI -81.6 to -27.4)). Most of the n-6 fatty acid effects interacted significantly with smoking, their effects being strongest in current smokers. Individual n-3 fatty acid intakes were generally associated with a higher risk of wheeze in the past year, but otherwise there was little or no association between fatty acid intake and wheeze, doctor diagnosed asthma or other respiratory symptoms. CONCLUSIONS A high intake of n-3 fatty acids does not appear to protect against COPD or asthma, but a high intake of several n-6 fatty acids is associated with a significant reduction in FEV1, particularly in smokers. These findings indicate that high dietary intake of n-6 fatty acids, rather than reduced n-3 intake, may have an adverse effect on lung health.
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Affiliation(s)
- T M McKeever
- University of Nottingham, Clinical Science Building, City Hospital, Nottingham NG5 1PB, UK.
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11
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Fogarty AW, Antoniak M, Venn AJ, Davies L, Goodwin A, Salfield N, Stocks J, Britton J, Lewis SA. Does participation in a population-based dietary intervention scheme have a lasting impact on fruit intake in young children? Int J Epidemiol 2007; 36:1080-5. [PMID: 17602183 DOI: 10.1093/ije/dym133] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND The National Schools Fruit Scheme (NSFS) is intended to improve fruit intake in young children by providing free daily fruit at school. METHODS We used a parentally completed questionnaire for three consecutive years to study fruit intake in young children before, during and after participation in the NSFS compared with a control region. RESULTS In 2003, 2004 and 2005, a total of 224, 220 and 179 schools, respectively, were studied with responses from 5,606, 5,111 and 3,382 children for each survey. Between 2003 and 2004, individual fruit consumption in the intervention region increased by more (from a median of 7.5 to 14.0 pieces/week) than in the control region (from a median of 9.2-11.0 pieces/week), resulting in a difference (P < 0.001) between the two regions in 2004. However, after ceasing to be eligible for the NSFS, fruit intake in children in the intervention region fell to a median of 12 pieces per week, lower than that in the control region (median value of 14 pieces per week, P = 0.02). CONCLUSIONS School-based fruit distribution schemes providing free fruit at school appear to be an effective means of increasing dietary fruit intake in young children, including those who live in relatively socio-economically deprived areas. However, this approach does not influence fruit intake after the provision of free fruit ends, so schemes may need to be sustained to provide the maximum benefit to young children.
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Affiliation(s)
- A W Fogarty
- Division of Epidemiology and Public Health, University of Nottingham.
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12
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Tata LJ, Hubbard RB, McKeever TM, Smith CJP, Doyle P, Smeeth L, West J, Lewis SA. Fertility rates in women with asthma, eczema, and hay fever: a general population-based cohort study. Am J Epidemiol 2007; 165:1023-30. [PMID: 17255115 DOI: 10.1093/aje/kwk092] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The protective association between having older siblings and the risk of subsequent allergic disease may be due to decreased fertility among women with allergic disease. In this study, the authors compared fertility rates among women with asthma, eczema, or hay fever with those in the general female population. Computerized primary-care data from the United Kingdom were used to conduct a cohort analysis of 491,516 women. General fertility rates and age-specific fertility rates for 1994-2004 were estimated. Using Poisson regression, the authors compared fertility rates among women with asthma, eczema, or hay fever with rates in women without these diagnoses. Fertility rates were 53.0 and 52.3 livebirths per 1,000 person-years in women with and without asthma, respectively. The fertility rate ratio for women with asthma compared with women without asthma was 1.02 (95% confidence interval (CI): 1.00, 1.04) after adjustment for age, smoking, body mass index, and socioeconomic status. Equivalent fertility rate ratios for eczema and hay fever were 1.15 (95% CI: 1.13, 1.17) and 1.08 (95% CI: 1.06, 1.10), respectively. The authors found no evidence that the fertility rates of women with asthma, eczema, or hay fever are lower than those of women in the general population.
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Affiliation(s)
- L J Tata
- Division of Epidemiology and Public Health, School of Community Health Sciences, University of Nottingham, Nottingham, United Kingdom.
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Abstract
Severe plant stunting, chlorosis, and extensive root galling were observed on chrysanthemum (Dendrathema grandiflora cv. Yellow Vero) in a commercial cut-flower production facility in Rionegro, Antioquia, northwestern Colombia. Examination of the root samples from selected infected plants revealed the presence of abundant root-knot nematodes. Juveniles, males, and females were extracted for species identification using morphological characteristics. Identification was confirmed by perineal patterns and esterase phenotype analysis of females. All methods of identification were consistent with typical Meloidogyne javanica. No other root-knot nematode species were found on this farm, but the presence of other Meloidogyne species in the region is possible. Root-knot nematodes have been reported to cause economic losses in cut-flower plantations in Colombia (1), but there are no reports of the species involved. M. javanica has an extensive host range and wide distribution. The identification and distribution of M. javanica in chrysanthemum production is relevant because nematode-fungus interactions may depend on the nematode species involved. Only M. javanica, and not M. hapla or M. incognita, has been found to increase the severity of Fusarium wilt on chrysanthemum (2). To our knowledge, this is the first report of M. javanica on chrysanthemum in Colombia. References: (1) G. Arbeláez. Acta Hortic. 482:91, 1999. (2) A. W. Johnson and R. H. Littrell. J. Nematol. 1:122. 1969.
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Affiliation(s)
| | - S A Lewis
- Clemson University, Clemson, SC 29634
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Vance GHS, Lewis SA, Grimshaw KEC, Wood PJ, Briggs RA, Thornton CA, Warner JO. Exposure of the fetus and infant to hens' egg ovalbumin via the placenta and breast milk in relation to maternal intake of dietary egg. Clin Exp Allergy 2006; 35:1318-26. [PMID: 16238791 DOI: 10.1111/j.1365-2222.2005.02346.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Maternally derived allergens may be transferred to the developing infant during pregnancy and lactation. However, it is not known how manipulation of environmental allergen levels might impact on this early-life exposure. OBJECTIVE To measure dietary egg allergen (ovalbumin (OVA)) in gestation-associated environments, in relation to maternal dietary egg intake. METHOD OVA was measured by allergen-specific ELISA in maternal blood collected throughout pregnancy, infant blood at birth (umbilical cord) and in breast milk at 3 months post-partum. Samples derived from pregnant women undergoing diagnostic amniocentesis at 16-18 weeks gestation who were not subject to any dietary intervention, and from pregnant women, with personal or partner atopy, randomized to complete dietary egg exclusion or an unmodified healthy diet before 20 weeks gestation as a primary allergy prevention strategy. Maternal dietary egg intake was monitored closely throughout the study period by diary record and serial measurement of OVA-specific immunoglobulin G concentration. RESULTS Circulating OVA was detected throughout pregnancy in 20% of women and correlated with both presence (P<0.001) and concentration (r=0.754, P<0.001) of infant OVA at birth (umbilical cord). At 3 months post-partum OVA was detected in breast milk samples of 35% women, in higher concentrations than measured in blood. Blood and breast milk OVA were not related to maternal dietary intake or atopic pre-disposition. CONCLUSIONS Rigorous dietary egg exclusion does not eliminate trans-placental and breast milk egg allergen passage. This early-life exposure could modulate developing immune responses.
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Affiliation(s)
- G H S Vance
- Child Health, Infection, Inflammation & Repair Division, University of Southampton, Southampton, UK.
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15
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Hourihane JO, Grimshaw KEC, Lewis SA, Briggs RA, Trewin JB, King RM, Kilburn SA, Warner JO. Does severity of low-dose, double-blind, placebo-controlled food challenges reflect severity of allergic reactions to peanut in the community? Clin Exp Allergy 2006; 35:1227-33. [PMID: 16164452 DOI: 10.1111/j.1365-2222.2005.02312.x] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND The severity of allergic reactions to food appears to be affected by many interacting factors. It is uncertain whether challenge-based reactions reflect the severity of past reactions or can predict future risk. OBJECTIVE To explore the relationship of a subject's clinical history of past reactions to the severity of reaction elicited by a low-dose, double-blind, placebo-controlled food challenge (DBPCFC) with peanut. METHOD Cross-sectional questionnaire assessment of community-based allergic reactions and low-dose DBPCFC in self-selected peanut-allergic subjects. Reaction severity was assessed using a novel scoring system, taking account of the dose of allergen ingested. RESULTS Forty subjects (15 males, 23 children, 23 asthmatics by history) were studied. Only the most recent community reaction predicted the severity of reaction in the DBPCFC, but even this association was weak (r=0.37, P=0.03). Peanut-specific IgE (PsIgE) and skin prick test (SPT) weal size were not associated with community score but PsIgE level correlated well with the challenge score (r=0.6, P=0.001). Asthma did not affect the eliciting dose or challenge score directly but the association of PsIgE and challenge score was stronger in those without asthma (r=0.72, P=0.001) than in those with asthma (r=0.48, P=0.02). CONCLUSIONS The scoring system developed appears to improve the sensitivity of assessment of reactions induced by DBPCFC. This is the first prospective study showing an association between PsIgE levels and clinical reactivity in DBPCFC, an effect that is more pronounced in non-asthmatics. This finding has important implications for the clinical care of subjects with food allergy. There is a poor correlation between the severity of reported reactions in the community and the severity of reaction elicited during low-dose DBPCFC with peanut.
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Affiliation(s)
- J O'B Hourihane
- Allergy & Inflammation Research (Child Health), University of Southampton, Southampton, UK.
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Pearson P, Britton J, McKeever T, Lewis SA, Weiss S, Pavord I, Fogarty A. Lung function and blood levels of copper, selenium, vitamin C and vitamin E in the general population. Eur J Clin Nutr 2005; 59:1043-8. [PMID: 16015272 DOI: 10.1038/sj.ejcn.1602209] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Increased dietary intake of antioxidants has been associated with higher lung function, but few studies have used biological markers of antioxidant intake. OBJECTIVE This study aimed to determine if antioxidant status, as measured by blood levels, influences lung function. DESIGN Using a random subsample of 479 participants, aged 18-65 y old, from a larger cross-sectional observational study, the association of forced expiratory volume in 1 s (FEV1) with plasma copper, vitamin C, vitamin E and serum selenium was assessed. RESULTS An s.d. increase in blood copper level was associated with a difference in FEV1 of -48 ml (95% confidence intervals: -95, -2 ml, P = 0.04), vitamin C +49 ml (+4, +94, P = 0.03), vitamin E -15 ml (-62, +32, P = 0.53) and selenium +52 ml (+7, +96, P = 0.02). The sizes of association were not appreciably altered in a mutually adjusted model. CONCLUSIONS Higher levels of serum vitamin C and selenium appear to be associated with higher FEV1. The association between higher serum copper and lower FEV1 requires further study in view of the ubiquitous exposure to this mineral.
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Affiliation(s)
- P Pearson
- Division of Respiratory Medicine, University of Nottingham, Nottingham City Hospital, Nottingham, UK
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Haileamlak A, Lewis SA, Britton J, Venn AJ, Woldemariam D, Hubbard R, Williams HC. Validation of the International Study of Asthma and Allergies in Children (ISAAC) and U.K. criteria for atopic eczema in Ethiopian children. Br J Dermatol 2005; 152:735-41. [PMID: 15840106 DOI: 10.1111/j.1365-2133.2005.06511.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Reliable diagnostic criteria for atopic eczema (AE) are essential in order to make international comparisons and to identify possible disease risk factors. Little is known about the prevalence of atopic eczema and validity of diagnostic criteria for AE in developing countries where English is not the first language. OBJECTIVES We sought to determine the prevalence of AE in an area of urban and rural Ethiopia, and to compare the predictive values of different questionnaire and examination methods for diagnosing AE in this population. METHODS We conducted a cross-sectional survey of 7915 children aged 1-5 years living in and around the town of Jimma in southwest Ethiopia. AE prevalence was assessed in two ways: (i) by using the International Study for Asthma and Allergies in Childhood (ISAAC) questionnaire, and (ii) using the U.K. refinement of Hanifin and Rajka's diagnostic criteria. All possible cases identified by screening questions and random samples of controls were then examined by an experienced local paediatrician, who acted as a reference standard to determine the predictive value of the criteria used to diagnose AE. RESULTS The overall 1-year period prevalence of AE according to ISAAC and U.K. criteria was 4.4%[95% confidence interval (CI) 3.95-4.85] and 1.8% (95% CI 1.5-2.1), respectively. Corresponding point prevalence estimates (symptoms in the last week) were 1.8% for ISAAC and 1.3% for the U.K. criteria. The positive predictive values of the ISAAC and U.K. criteria questions for AE symptoms still reported to be present (in the last week) at the doctor's examination were 48.8% and 55.5%, respectively. Corresponding negative predictive values were 90.5% and 90.1%, respectively. The sign of visible flexural dermatitis (a component of the U.K. criteria) when used alone had positive and negative predictive values of 57% and 91%, respectively. CONCLUSIONS Neither the ISAAC nor U.K. criteria performed especially well in predicting cases of AE in this survey. Possible reasons include problems with questionnaire translation, cultural conceptions of terminology, asking parents rather than the child about symptoms, the transient nature of AE signs, and differences in what a doctor perceives to constitute a typical case of AE. The results do not preclude the use of standardized diagnostic criteria alongside a doctor's examination in future surveys of Ethiopian children, and knowledge of the criteria's limited predictive value should help to interpret study findings that have employed such criteria. Consideration should be given to adopting the sign of visible flexural dermatitis as a standard for estimating the point prevalence of AE throughout the world because it is less susceptible to problems with translation and interpretation.
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Affiliation(s)
- A Haileamlak
- Department of Paediatrics and Child Health, Jimma University, Ethiopia
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Rakha EA, Abd El Rehim D, Pinder SE, Lewis SA, Ellis IO. E-cadherin expression in invasive non-lobular carcinoma of the breast and its prognostic significance. Histopathology 2005; 46:685-93. [PMID: 15910600 DOI: 10.1111/j.1365-2559.2005.02156.x] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND E-cadherin is a cell adhesion molecule that is expressed in normal breast tissue and is often considered useful as a phenotypic marker in breast cancer diagnosis, with absence of its expression frequently observed in tumours of lobular subtype. However, the clinicopathological and prognostic value of E-cadherin in the more frequent non-lobular types of breast carcinoma is unclear. METHODS AND RESULTS E-cadherin expression was assessed immunohistochemically in a large and well-characterized series of invasive non-lobular breast carcinoma types (n=1665) with long-term clinical follow-up (median 56 months) using tissue microarray technology, to determine the relationship between its expression and primary tumour characteristics and disease outcome. Only membranous expression of E-cadherin was considered in this study and its expression was categorized as normal (H-score>100) or reduced [absent or below the median (score</=100)]. Complete absence of its expression (score=0) was detected in 7.2% of cases. On univariate analysis, reduced E-cadherin expression was associated with a reduced disease-free interval and overall survival and also with indicators of poor prognosis including larger tumour size, higher histological grade, development of distant metastasis and tumours negative for oestrogen receptors. No association between E-cadherin expression and lymph node status was found. On multivariate analysis, E-cadherin was an independent predictor of disease-free interval [hazards ratio (HR) 1.56, 95% confidence intrerval (CI) 1.23, 1.99; P<0.001] and overall survival (HR 1.53, 95% CI 1.09, 2.14; P=0.013) and there was some evidence that the prognostic value was greater in those with positive lymph nodes (P interaction=0.099). CONCLUSIONS These results suggest that E-cadherin loss may play a role in progression, development of distant metastasis and recurrence in non-lobular invasive carcinomas of the breast and its assessment by immunohistochemistry may help in the identification of patients with poor outcomes.
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Affiliation(s)
- E A Rakha
- The Breast Unit, Department of Histopathology and Division of Respiratory Medicine, Nottingham City Hospital NHS Trust, University of Nottingham, Nottingham, UK
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Lewis SA, Grimshaw KEC, Warner JO, Hourihane JO. The promiscuity of immunoglobulin E binding to peanut allergens, as determined by Western blotting, correlates with the severity of clinical symptoms. Clin Exp Allergy 2005; 35:767-73. [PMID: 15969668 DOI: 10.1111/j.1365-2222.2005.02252.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND IgE binding to a specific protein has been shown to be associated with severe anaphylaxis to hazelnuts; however, the relationship between IgE binding to specific peanut allergens and symptom severity is currently unclear. OBJECTIVE To determine if the pattern of IgE binding to specific peanut allergens is associated with the severity of clinical symptoms. METHODS Forty peanut allergic patients underwent a double-blind placebo-controlled low-dose peanut challenge, during which the severity of the patients' peanut allergy was scored. Serum peanut-specific IgE (psIgE) was measured and IgE binding patterns to peanut proteins analysed. RESULTS Seventeen IgE binding bands were identified between 5 and 100 kDa with eight bound by >50% of patients. The total number of bands per patient correlated significantly with challenge score (P=0.001, r=0.505) and psIgE (P<0.001, r=0.820). Cluster analysis failed to reveal any association between a particular protein or pattern of proteins (based on presence/absence) and challenge score. However, two protein bands ( approximately 43 and 41 kDa) had peak intensities that correlated positively with challenge score and a third band ( approximately 48 kDa) that correlated negatively. The bands were identified as subunits of Ara h 3/4 and 1, respectively. CONCLUSIONS Promiscuity of IgE binding appears more important than the recognition of individual proteins. This may mean that clinically useful specific immunotherapy for peanut allergy will be difficult to achieve if only selected allergenic proteins are used. Further investigation of Ara h 1 and 3/4 subunits and a possible association with symptom severity are also highlighted by this study.
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Affiliation(s)
- S A Lewis
- Department of Infection and Inflammation Research, University of Southampton, Southampton, UK.
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Vance GHS, Grimshaw KEC, Briggs R, Lewis SA, Mullee MA, Thornton CA, Warner JO. Serum ovalbumin-specific immunoglobulin G responses during pregnancy reflect maternal intake of dietary egg and relate to the development of allergy in early infancy. Clin Exp Allergy 2005; 34:1855-61. [PMID: 15663559 DOI: 10.1111/j.1365-2222.2004.02111.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND The value of allergen elimination diets during pregnancy for primary prevention of infant allergy has been questioned. However, dietary compliance may influence effectiveness. OBJECTIVES To monitor egg intake during a randomized controlled trial of egg avoidance throughout pregnancy and lactation by serial measurements of serum ovalbumin (OVA) IgG concentration in conjunction with dietary diary record and also, to analyse specific IgG concentrations at birth in relation to infant allergic outcome. METHODS Pregnant women, with personal or partner atopy, were randomized to complete dietary egg exclusion or an unmodified healthy diet before 20 weeks gestation. The infants were evaluated for atopy at 6 months of age. Serum food-specific IgG concentrations were determined by ELISA in maternal samples collected at study recruitment and during labour, and in infant samples at birth (umbilical cord). RESULTS Serum-specific IgG to OVA, but not the unrelated allergen, cow's milk beta-lactoglobulin, decreased over pregnancy in egg-avoiding women only (P<0.001). Cord OVA IgG concentration correlated with maternal IgG at delivery (r=0.944; P<0.001), and for infants born to atopic women, cord concentration was higher than that of their mother's (P<0.001). Infants with the lowest and highest cord IgG concentrations were the least likely, and those with mid-range concentrations were the most likely, to be atopic by 6 months of age (P=0.008). CONCLUSION Serum OVA IgG concentration reflects egg consumption, thereby indicating dietary allergen doses to which the developing immune system might be exposed. Trans-placental maternal IgG must be considered among early life factors that regulate infant atopic programming.
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Affiliation(s)
- G H S Vance
- Child Health, Infection, Inflammation & Repair Division, Health Care Research Unit, University of Southampton, UK.
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Lewis SA, Antoniak M, Venn AJ, Davies L, Goodwin A, Salfield N, Britton J, Fogarty AW. Secondhand smoke, dietary fruit intake, road traffic exposures, and the prevalence of asthma: a cross-sectional study in young children. Am J Epidemiol 2005; 161:406-11. [PMID: 15718476 DOI: 10.1093/aje/kwi059] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The authors have investigated the independent effects of exposure to secondhand smoke, road vehicle traffic, and dietary fruit intake in a cross-sectional study of asthma in young children. They surveyed all children aged 4-6 years in 235 schools in the East Midlands and East of England regions of the United Kingdom in 2003. Data on respiratory symptoms, diagnoses and treatment, smoking in the home, and dietary fruit intake were collected by parental questionnaire. A geographic information system was used to map postcodes and determine the distance of the home from the nearest main road. Responses were obtained from 11,562 children. Wheeze in the past year and physician-diagnosed asthma were reported by 14.1% and 18.2%, respectively. Both of these outcomes were more common in children who lived with a smoker, and the prevalence of asthma increased with the number of smokers in the home. Asthma prevalence was not associated with proximity of the home to a main road or with dietary fruit intake. The authors conclude that, of the potential risk factors considered in this study, preventing secondhand smoke exposure may be the most effective way of preventing asthma.
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Affiliation(s)
- S A Lewis
- Division of Respiratory Medicine, University of Nottingham, Nottinghan, United Kingdom.
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Broadfield EC, McKeever TM, Whitehurst A, Lewis SA, Lawson N, Britton J, Fogarty A. A case-control study of dietary and erythrocyte membrane fatty acids in asthma. Clin Exp Allergy 2004; 34:1232-6. [PMID: 15298563 DOI: 10.1111/j.1365-2222.2004.02032.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Epidemiological evidence suggests that increased dietary omega-6 and reduced omega-3 fatty acid intake, may have contributed to the rising prevalence of asthma, but these hypotheses have not been tested in studies comparing both dietary intake and objective measures of polyunsaturated fatty acids. OBJECTIVE To assess whether a higher intake of omega-6 or a lower intake of omega-3 fatty acids increases the risk of asthma, by measuring dietary fatty acid intake by a food frequency questionnaire (FFQ) and erythrocyte membrane fatty acids, as an objective biomarker of intake. METHODS We have compared individual fatty acid intake estimated by FFQ and by mass spectrometry of fasting erythrocyte cell membranes in 89 cases of asthma and 89 community-matched controls. RESULTS The odds of asthma were increased in relation to intake of the omega-3 fatty acids eicosapentaenoic acid (odds ratio (OR) for difference between the 25th and 75th centiles of intake= 1.89, 95% CI 1.15-3.11) and docosahexaenoic acid (OR = 2.11, 95% CI 1.19-3.74). There was no evidence of any difference in erythrocyte membrane levels of omega-3 fatty acids, while the odds of asthma were reduced in relation to linoleic acid (omega-6) membrane levels (OR = 0.45, 95% CI 0.21-0.95). CONCLUSION These findings suggest that dietary omega-3 fatty acids do not play a major role in protecting against asthma, and that higher levels of erythrocyte membrane linoleic acid are associated with a lower risk of asthma.
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Affiliation(s)
- E C Broadfield
- Division of Respiratory Medicine, University of Nottingham, Clinical Science Building, Nottingham, UK.
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Abstract
BACKGROUND Lymphangioleiomyomatosis (LAM) is a rare and progressive disease of young women with no effective treatment. Previous estimates of 10 year survival, based mostly on case series or patients from tertiary centres, have ranged from 40% to 79%; no data are available on the progression of respiratory disability. In order to provide data for patients and for planning intervention studies, we have looked at the time course of LAM using a national cohort. METHODS Time to death, time to MRC dyspnoea grades 2-5, and need for oxygen in patients on the UK LAM database were analysed using Kaplan-Meier analysis and Cox regression. RESULTS Fifty seven of 72 patients responded with a median duration of follow up of 12.6 years (range 2.3-37) from the onset of symptoms. Ten year survival was 91% from onset of symptoms but varied widely with 11 patients alive after 20 years. Median time to MRC grade 3 dyspnoea (breathless walking on the flat) was 9.3 years (95% CI 5.1 to 13.4) from onset of symptoms. CONCLUSIONS Survival from LAM appears to be better than that reported in early studies. These data should be helpful for patients and for planning clinical trials.
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Affiliation(s)
- S R Johnson
- Division of Therapeutics and Molecular Medicine, Queens Medical Centre, University of Nottingham, Nottingham, UK.
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Abstract
BACKGROUND Increased dietary vitamin E intake is associated with a reduced incidence of asthma, and combinations of antioxidant supplements including vitamin E are effective in reducing ozone induced bronchoconstriction. A study was undertaken to investigate the effect of supplementation with vitamin E for 6 weeks on bronchial hyperresponsiveness in atopic adults with asthma. METHODS 72 participants from a clinical trial register of adults with asthma were randomised to receive 500 mg natural vitamin E or matched placebo for 6 weeks in a placebo controlled, double blind parallel group clinical trial. Inclusion criteria included age 18-60 years, maintenance treatment of at least one dose of inhaled corticosteroid per day, a positive skin prick test to one of three common allergens, and bronchial hyperresponsiveness to methacholine (defined as a dose provoking a 20% fall in forced expiratory volume in 1 second (FEV(1)) (PD(20)) of 12.25 micromol). Secondary outcomes were FEV(1), forced vital capacity, mean morning and evening peak flow, symptom scores, bronchodilator use, and serum immunoglobulin E levels. RESULTS In the primary intention to treat analysis the change in PD(20) was similar in the vitamin E and placebo groups with a mean difference of +0.25 doubling doses of methacholine (95% confidence interval -0.67 to +1.16 greater with vitamin E). There was no effect of vitamin E supplementation on any other measure of asthma control, either in the intention to treat or per protocol analysis. There was also no effect of vitamin E supplementation on serum immunoglobulin levels. CONCLUSION Dietary supplementation with vitamin E adds no benefit to current standard treatment in adults with mild to moderate asthma.
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Affiliation(s)
- P J K Pearson
- Division of Respiratory Medicine, University of Nottingham, Clinical Science Building, Nottingham City Hospital, Nottingham NG5 1PB, UK
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Yemaneberhan H, Flohr C, Lewis SA, Bekele Z, Parry E, Williams HC, Britton J, Venn A. Prevalence and associated factors of atopic dermatitis symptoms in rural and urban Ethiopia. Clin Exp Allergy 2004; 34:779-85. [PMID: 15144471 DOI: 10.1111/j.1365-2222.2004.1946.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Allergic diseases, including atopic dermatitis (AD), are increasingly becoming a clinical problem in developing countries. OBJECTIVE We investigated the prevalence of AD symptoms and the effects of potential environmental aetiologies in rural and urban areas of Jimma in southwestern Ethiopia. METHODS Information on allergic disease symptoms and lifestyle factors was gathered in an interviewer-led cross-sectional questionnaire-based population survey of 9844 urban and 3032 rural participants of all ages. A one-in-four subsample underwent skin prick testing for hypersensitivity to Dermatophagoides pteronyssinus, mixed threshings, and aspergillus. RESULTS Around 95% of those eligible took part in the survey. Lifetime cumulative prevalence of AD symptoms was generally low with an overall prevalence of 1.2%, but was higher in the urban (1.5%) than in the rural area (0.3%; odds ratio (OR)=4.45 [95% CI 2.34-8.47]). AD symptoms were strongly associated with wheeze (adjusted OR=22.03 [15.45-31.42]) and rhinitis symptoms (61.94 [42.66-89.95]). Of several environmental exposures assessed, residence in a house made of brick (rather than mud) walls with wooden (rather than clay) floor, exposure to cigarette smoke as a child, having lived outside of Jimma in the past, and being of the Tigrean ethnic group were associated with an increased risk of AD symptoms. CONCLUSION Although the overall prevalence of AD symptoms was low in this Ethiopian population, a marked urban-rural gradient was evident. Lifestyle factors linked to urbanization were associated with an increased risk of AD symptoms.
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Dagoye D, Bekele Z, Woldemichael K, Nida H, Yimam M, Venn AJ, Hall A, Britton JR, Lewis SA, McKeever T, Hubbard R. Domestic risk factors for wheeze in urban and rural Ethiopian children. QJM 2004; 97:489-98. [PMID: 15256606 DOI: 10.1093/qjmed/hch083] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND To identify which environmental exposures underpin the emergence of asthma epidemics, we need to study epidemics as they appear, as is now happening in the Jimma region of Ethiopia. We have previously studied risk factors for asthma in adults in Jimma and have now completed a survey of young children. AIM To establish the prevalence of asthma in urban and rural children in Jimma, and to identify locally important risk factors. DESIGN Cross-sectional survey. METHODS All children aged 1-5 years living in Jimma town and three surrounding rural regions were identified. Data were collected using an interviewer-led questionnaire, and consenting children had skin prick tests to house dust mite and cockroach. RESULTS We surveyed 7155 children, of whom 3623 (51%) were female and 4285 (60%) lived in the urban area. The prevalence of wheeze in the last year was 3.4%, and was lower in the rural area (OR 0.47; 95%CI 0.34-0.66). In the urban area, the main risk factors for wheeze were a longer duration of breastfeeding, use of kerosene, and environmental tobacco smoke, while living with animals was protective. In rural children, the main risk factors were a positive skin prick test and living with animals. DISCUSSION The prevalence of wheeze in children in the Jimma region is low, particularly in rural children. In addition to having an impact on disease prevalence, place of residence also appears to modify the impact of environmental risk factors for wheeze.
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Affiliation(s)
- D Dagoye
- Faculty of Medical Sciences, Jimma University, Jimma, Ethiopia
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Fogarty A, Lewis SA, Scrivener SL, Antoniak M, Pacey S, Pringle M, Britton J. Oral magnesium and vitamin C supplements in asthma: a parallel group randomized placebo-controlled trial. Clin Exp Allergy 2003; 33:1355-9. [PMID: 14519140 DOI: 10.1046/j.1365-2222.2003.01777.x] [Citation(s) in RCA: 109] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Epidemiological studies suggest that higher intakes of dietary vitamin C and magnesium may be associated with a reduced risk of asthma. OBJECTIVE To determine whether vitamin C or magnesium supplements improve the clinical control of asthma in primary care patients. METHODS A randomized, placebo-controlled, double-blind parallel group trial of 16 weeks supplementation with 1 g/day vitamin C, 450 mg/day magnesium chelate or matched placebo. Three hundred patients aged 18-60 years with physician-diagnosed asthma, controlled with at least one dose of an inhaled corticosteroid daily, were recruited from 24 primary care practices in Nottingham, UK. The main outcome measures were change in forced expiratory volume in 1 s, forced vital capacity, airway responsiveness to methacholine, mean morning and evening peak flow, symptom scores and bronchodilator use, both individually and as a combined summary statistic. RESULTS There was no evidence of any beneficial effect of either supplement on any outcome measure of asthma control in the primary intention-to-treat analysis, or in an analysis restricted to participants who completed the study. CONCLUSIONS Regular dietary supplementation with vitamin C or magnesium adds no clinical benefit to current standard therapy of asthma in primary care patients.
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Affiliation(s)
- A Fogarty
- Division of Respiratory Medicine, University of Nottingham, Nottingham City Hospital, Hucknall Road, Nottingham NG5 1PB, UK.
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Venn AJ, Cooper M, Antoniak M, Laughlin C, Britton J, Lewis SA. Effects of volatile organic compounds, damp, and other environmental exposures in the home on wheezing illness in children. Thorax 2003; 58:955-60. [PMID: 14586048 PMCID: PMC1746513 DOI: 10.1136/thorax.58.11.955] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND The effects of indoor exposure to volatile organic compounds (VOCs), including formaldehyde, on respiratory health are not clearly understood. The aim of this study was to determine the independent effects of VOCs and other common environmental exposures in the home on the risk and severity of persistent wheezing illness in children. METHODS Total volatile organic compounds, formaldehyde, nitrogen dioxide, damp (on a four category scale of % wood moisture equivalent), and environmental tobacco smoke (from salivary cotinine) were measured objectively in the homes of 193 children with persistent wheezing illness and 223 controls aged 9-11 years in Nottingham, UK. RESULTS The risk of wheezing illness was significantly increased only in relation to damp (odds ratio (OR) per increasing category=1.32 (95% confidence interval (CI), 1.00 to 1.75)), and was unrelated to the other exposures measured. Among cases, formaldehyde and damp were associated with more frequent nocturnal symptoms (OR per increasing quartile and category, respectively, 1.45 (1.06 to 1.98) and 1.97 (1.10 to 3.53)), significantly more so in atopic cases, but there was no effect of total volatile organic compounds, nitrogen dioxide, or cotinine. CONCLUSIONS Domestic volatile organic compounds are not a major determinant of risk or severity of childhood wheezing illness, though formaldehyde may increase symptom severity. Indoor damp increases both the risk and severity of childhood wheezing illness.
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Affiliation(s)
- A J Venn
- Division of Epidemiology and Public Health, University of Nottingham, Nottingham, UK.
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Whale CI, Johnson SR, Phillips KG, Newton SA, Lewis SA, Tattersfield AE. Lymphangioleiomyomatosis: a case-control study of perinatal and early life events. Thorax 2003; 58:979-82. [PMID: 14586053 PMCID: PMC1746512 DOI: 10.1136/thorax.58.11.979] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Lymphangioleiomyomatosis (LAM), a rare disease affecting women, is caused by somatic mutations in the tuberous sclerosis complex genes. METHODS A case-control questionnaire study was carried out examining parental and family history, prenatal events, and early life events to try to shed light on the aetiology of the condition. Forty five patients identified from a national LAM register completed a questionnaire and 31 were compared with 117 age and sex matched control subjects using conditional logistic regression. RESULTS No differences were found in perinatal events, childhood infections, and parental or family history, except that patients were more likely to be an only child (odds ratio (OR) 4.3 (95% confidence interval (CI), 1.5 to 11.8)) and have a relative with uterine fibroids (OR 4.2 (1.4 to 13)). Patients with LAM had had fewer pregnancies and fewer children but no differences in miscarriage rates. A non-matched analysis using all 45 cases and 117 controls gave similar results. CONCLUSIONS No features in the family history, perinatal events, or early life events were detected that were associated with having LAM. Being more likely to be an only child and having an increased family history of uterine fibroids may, if confirmed, indicate some differences in reproductive function within the families of affected individuals.
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Affiliation(s)
- C I Whale
- Division of Respiratory Medicine, City Hospital, Nottingham, UK
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Birring SS, Morgan AJ, Prudon B, McKeever TM, Lewis SA, Falconer Smith JF, Robinson RJ, Britton JR, Pavord ID. Respiratory symptoms in patients with treated hypothyroidism and inflammatory bowel disease. Thorax 2003; 58:533-6. [PMID: 12775870 PMCID: PMC1746690 DOI: 10.1136/thorax.58.6.533] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Patients with idiopathic chronic cough and unexplained airflow obstruction in non-smokers have been shown to have an increased prevalence of hypothyroidism and other organ specific autoimmune disorders. Whether patients with hypothyroidism have an increased prevalence of respiratory symptoms is unknown. METHODS The prevalence of respiratory symptoms was assessed in 124 patients with treated hypothyroidism recruited from primary and secondary care, 64 outpatients with inflammatory bowel disease, and 1346 control adults recruited randomly from the electoral register in a case-control study. Respiratory symptoms and smoking history were assessed by a respiratory symptom questionnaire. RESULTS After adjustment for age, sex and smoking, symptoms of breathlessness and sputum production were more prevalent in both patient populations than in controls (odds ratios for hypothyroidism and inflammatory bowel disease; breathlessness: 3.1 (95% CI 2.1 to 4.6) and 3.4 (95% CI 2.0 to 6.0), respectively; sputum production: 2.7 (95% CI 1.6 to 4.5) and 2.5 (95% CI 1.2 to 5.0), respectively). Cough during the day and night was significantly more prevalent in patients with hypothyroidism (1.8 (95% CI 1.2 to 2.9)) and approached significance in those with inflammatory bowel disease (1.8 (95% CI 1.0 to 3.4)). Wheeze and nocturnal cough were no more prevalent in either disease population than in controls. CONCLUSION There is a significantly increased prevalence of respiratory symptoms in patients with hypothyroidism or inflammatory bowel disease compared with controls recruited from the general population. Further work is required to determine whether similar differences are seen in comparison with hospital based controls. These findings support the hypothesis that there is a link between autoimmune hypothyroidism and respiratory disease.
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Affiliation(s)
- S S Birring
- Institute for Lung Health, Department of Respiratory Medicine, Glenfield Hospital, Leicester LE3 9QP, UK.
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Lim WS, van der Eerden MM, Laing R, Boersma WG, Karalus N, Town GI, Lewis SA, Macfarlane JT. Defining community acquired pneumonia severity on presentation to hospital: an international derivation and validation study. Thorax 2003; 58:377-82. [PMID: 12728155 PMCID: PMC1746657 DOI: 10.1136/thorax.58.5.377] [Citation(s) in RCA: 1902] [Impact Index Per Article: 90.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND In the assessment of severity in community acquired pneumonia (CAP), the modified British Thoracic Society (mBTS) rule identifies patients with severe pneumonia but not patients who might be suitable for home management. A multicentre study was conducted to derive and validate a practical severity assessment model for stratifying adults hospitalised with CAP into different management groups. METHODS Data from three prospective studies of CAP conducted in the UK, New Zealand, and the Netherlands were combined. A derivation cohort comprising 80% of the data was used to develop the model. Prognostic variables were identified using multiple logistic regression with 30 day mortality as the outcome measure. The final model was tested against the validation cohort. RESULTS 1068 patients were studied (mean age 64 years, 51.5% male, 30 day mortality 9%). Age >/=65 years (OR 3.5, 95% CI 1.6 to 8.0) and albumin <30 g/dl (OR 4.7, 95% CI 2.5 to 8.7) were independently associated with mortality over and above the mBTS rule (OR 5.2, 95% CI 2.7 to 10). A six point score, one point for each of Confusion, Urea >7 mmol/l, Respiratory rate >/=30/min, low systolic(<90 mm Hg) or diastolic (</=60 mm Hg) Blood pressure), age >/=65 years (CURB-65 score) based on information available at initial hospital assessment, enabled patients to be stratified according to increasing risk of mortality: score 0, 0.7%; score 1, 3.2%; score 2, 3%; score 3, 17%; score 4, 41.5% and score 5, 57%. The validation cohort confirmed a similar pattern. CONCLUSIONS A simple six point score based on confusion, urea, respiratory rate, blood pressure, and age can be used to stratify patients with CAP into different management groups.
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Affiliation(s)
- W S Lim
- Respiratory Infection Research Group, Respiratory Medicine, Nottingham City Hospital, Nottingham NG5 1PB, UK
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Abstract
Obstructive airways diseases typically present with dyspnoea, cough and wheeze, and are defined by a reduced forced expiratory volume in one second (FEV1/forced vital capacity (FVC) ratio. Traditionally, however, the severity of chronic obstructive pulmonary disease is graded by the FEV1 % predicted rather than the FEV1/FVC ratio, whilst other potentially valid measures of FEV1 impairment, such as the absolute difference of FEV1 from predicted or the absolute level of FEV1, tend not to be used. The authors have therefore explored the relationship between these different measures of FEV1 impairment and chronic respiratory symptoms in a general population sample. FEV1 and FVC were measured and questionnaire data were obtained on cough, wheeze, shortness of breath and general self-reported breathing trouble in a cross-sectional survey of 2,633 adults aged 18-70 yrs from a district of Nottingham, UK. Odds ratios for each symptom were calculated for declining levels of absolute FEV1, FEV1 % pred, absolute difference of FEV1 from predicted, and FEV1/FVC ratio. They were plotted to display the shape and strength of these relationships before and after adjustment for each other measure. The odds of symptoms increased with declining levels of all FEV1 measures, particularly for wheeze and general breathing trouble. Although this study was not sufficiently powerful to detect significant differences between measures, these relationships were consistently strongest, before and after adjustment, for FEV1 % pred, particularly below a threshold of approximately 75%. The authors conclude that forced expiratory volume in one second % predicted appears to be the measure of airflow impairment most closely associated with chronic respiratory symptoms in the general population.
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Affiliation(s)
- N Jakeways
- Division of Respiratory Medicine, University of Nottingham, Nottingham, UK
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Affiliation(s)
- N J Cowan
- Department of Biochemistry, NYU Medical Center, New York, New York 10016, USA
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Abstract
The effect of road vehicle traffic pollution on asthma is still not clearly understood. However, any effect is likely to be most marked among those who live within 150 m of a main road, because this is the distance within which concentrations of primary vehicle traffic pollutants are raised above ambient background levels. We have investigated the relation between proximity of the family home to the nearest main road, estimated objectively using geographical information system software, and the risk of wheeze in the past year in a case-control sample of 6,147 primary schoolchildren (age 4 to 11 yr) and a random cross-sectional sample of 3,709 secondary schoolchildren (age 11 to 16 yr) in Nottingham, United Kingdom. Among children living within 150 m of a main road, the risk of wheeze increased with increasing proximity by an odds ratio (OR) of 1.08 (95% confidence interval [CI] 1.00 to 1.16) per 30-m increment in primary schoolchildren, and 1.16 (1.02 to 1.32) in secondary schoolchildren. Most of the increased risk was localized to within 90 m of the roadside. Among primary schoolchildren, effects were stronger in girls than boys (p(interaction) = 0.02). Living within approximately 90 m of a main road is associated with a proximity-related increase in the risk of wheezing illness in children.
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Affiliation(s)
- A J Venn
- Division of Respiratory Medicine, University of Nottingham, Nottingham, United Kingdom.
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Fortnum BA, Johnson AW, Lewis SA. Analysis of 1,3-Dichloropropene for Control of Meloidogyne spp. in a Tobacco Pest Management System. J Nematol 2001; 33:325-331. [PMID: 19265897 PMCID: PMC2620522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
1,3-Dichloropropene (1,3-D) and nonfumigant nematicides were evaluated for control of Meloidogyne spp. and soil and foliar insects in a tobacco pest management system. In a field with a high Meloidogyne spp. population density (root gall index 4.0 to 4.5 on a 0 to 10 scale in untreated controls), tobacco yields and crop values increased (482 kg/ha and $1,784/ha for 1, 3-D; 326 kg/ha and $1,206/ha for fenamiphos; 252 kg/ha and $933/ha for ethoprop) with nematicide application over an untreated control. In fields with a low population density of Meloidogyne arenaria or M. incognita (root gall index 2.3 to 2.5 in untreated controls), yields ranged from 1,714 to 2,027 kg/ha and were not altered by fumigant or nonfumigant nematicide application. Carbofuran, a soil-applied nonfumigant nematicide/insecticide, reduced the number of foliar insecticide applications required to keep insect populations below treatment threshold (3.8 vs. 4.5, respectively, for treated vs. untreated). Carbofuran reduced the cost ($23/ha) of foliar insecticide treatments when compared to an untreated control. Although nonfumigant nematicides provided some soil and foliar insect control, the cost of using a fumigant plus a lower insecticidal rate of a soil insecticide/nematicide was comparable to the least expensive non-fumigant nematicide when the cost of foliar insecticide applications was included in the cost estimates. Savings in foliar insecticide cost by use of soil-applied nonfumigant nematicide/insecticides were small ($23/ha) in comparison to potential value reductions by root-knot nematodes when the nonfumigant nematicides fenamiphos or ethoprop ($578/ha and $851/ha, respectively) were used instead of 1,3-D.
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Abstract
Airway responsiveness and variability in peak expiratory flow (PEF) are widely used as objective diagnostic measures of asthma, but it is not clear how these variables should be calculated or adjusted to obtain the highest diagnostic validity for physician-diagnosed asthma in the community. Data from a community-based sample of 1,513 adults has been used. Airway responsiveness to methacholine and 7-day PEF data were obtained in 1991, asthma and respiratory symptoms were diagnosed by questionnaires in 1991 and 1999. Airway responsiveness was expressed as the provocative dose causing a 20% fall in forced expiratory volume in one second (PD20), two-point and least-squares regression slopes. PEF variability was expressed as daily amplitude, weekly standard deviation and mean of the two lowest readings. Continuous measures were adjusted for measures of baseline airway calibre by linear regression. Measures of airway responsiveness had greater sensitivity for specificity for self-reported diagnosed asthma than expressions of PEF variability, before and after adjustment for airway calibre. Diagnostic validity was substantially better in adults aged <50 yrs; PD20 provided the best sensitivity for specificity (61% for 95% at 8.3 micromol). In those aged > or =50 yrs, no measure was closely related to diagnosed asthma. In younger age groups, provocative dose causing a 20% fall in forced expiratory volume in one second provides a valuable objective measure of asthma for epidemiological studies, but is unable to distinguish between asthma and chronic obstructive pulmonary disease in older people.
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Affiliation(s)
- S A Lewis
- Division of Respiratory Medicine, Clinical Sciences Building, City Hospital, University of Nottingham, UK
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Fortnum BA, Lewis SA, Johnson AW. Crop Rotation and Nematicides for Management of Mixed Populations of Meloidogyne spp. on Tobacco. J Nematol 2001; 33:318-324. [PMID: 19265896 PMCID: PMC2620523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
The effects of crop rotation and the nematicides 1,3-dichloropropene (1,3-D), ethoprop, and fenamiphos on the relative frequency of Meloidogyne incognita race 3, M. arenaria race 2, and M. javanica and tobacco yields on a sandy loam soil were determined. Cropping sequences altered the species composition and population densities of Meloidogyne spp. Meloidogyne arenaria and M. incognita predominated when cotton, corn, sorghum, or rye-fallow preceded tobacco. Meloidogyne javanica and M. arenaria predominated when tobacco preceded tobacco. Sorghum, cotton, corn, or rye-fallow preceding tobacco enhanced yields compared to tobacco preceding tobacco in plots containing mixtures of Meloidogyne species. Sorghum supported minimal reproduction of any Meloidogyne spp. Application of 1,3-D increased tobacco yields and reduced root galling when compared to untreated controls. Both fenamiphos and ethoprop treatments were less effective than 1,3-D in controlling Meloidogyne spp. or increasing yields. A rotation crop x nematicide interaction was not observed. In continuous tobacco, use of the M. incognita-resistant tobacco cv. Coker 176 increased tobacco yields when compared to the M. incognita-susceptible cv. Coker 319 when 1,3-D was not applied.
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Venn AJ, Yemaneberhan H, Bekele Z, Lewis SA, Parry E, Britton J. Increased risk of allergy associated with the use of kerosene fuel in the home. Am J Respir Crit Care Med 2001; 164:1660-4. [PMID: 11719306 DOI: 10.1164/ajrccm.164.9.2103101] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Allergic diseases are becoming increasingly prevalent in developing countries, consistent with an environmental etiology associated with affluence or urbanization. We have tested the hypothesis that the risk of allergy is increased by the use of non-biomass fuels (kerosene, gas or electricity) in the home, using data from a survey of the urban population of Jimma, Ethiopia. Questionnaire data on allergic symptoms, domestic fuel use and lifestyle factors were collected from 9844 adults and children, and allergen skin sensitization measured in a subsample of 2372. Use of any non-biomass fuel was reported by 959 individuals (10%), usually in combination with biomass fuel, and was significantly associated with an increased risk of allergic sensitization (age, sex and socio-economic status adjusted odds ratio (95% confidence interval) = 1.78 [1.06 to 2.97]) and wheeze (1.56 [1.07 to 2.26]), rhinitis (2.06 [1.46 to 2.91]) and eczema (2.82 [1.61 to 4.96]) relative to use of biomass fuel only. These effects were predominantly due to kerosene, which was significantly related to all outcomes, and gas, which was strongly related to allergic sensitization. Our findings suggest that domestic combustion of refined fossil fuels increases the risk of allergic sensitization and symptoms, and may have contributed to the increasing prevalence of allergic disease.
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Affiliation(s)
- A J Venn
- Division of Respiratory Medicine, University of Nottingham, Nottingham, United Kingdom.
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McKeever TM, Lewis SA, Smith C, Collins J, Heatlie H, Frischer M, Hubbard R. Siblings, multiple births, and the incidence of allergic disease: a birth cohort study using the West Midlands general practice research database. Thorax 2001; 56:758-62. [PMID: 11562513 PMCID: PMC1745942 DOI: 10.1136/thorax.56.10.758] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND The presence of older siblings reduces the risk of developing hay fever, eczema and atopy, but findings for asthma have been inconsistent. Whether twins have a reduced risk of allergic disease is also unclear. We have investigated these questions in a birth cohort analysis of the West Midlands General Practice Research Database (GPRD). METHODS Our birth cohort included 29,238 children. The incidence of allergic disease was examined according to the number of siblings, multiple births, and parental allergic disease and smoking habit using Cox regression. RESULTS There was a dose related decrease in the incidence of eczema and hay fever with increasing number of older siblings (hazard ratio for children with three or more older siblings compared with none 0.70 (95% CI 0.64 to 0.76) for eczema and 0.67 (95% CI 0.52 to 0.86) for hay fever). In contrast, the presence of older siblings increased the incidence of asthma (HR 1.17, 95% CI 1.06 to 1.29), although this effect was strongly dependent on age of diagnosis. For children diagnosed over the age of 2 years the presence of older siblings was protective (HR 0.66, 95% CI 0.52 to 0.82), while below this age the reverse was true (HR 1.38, 95% CI 1.24 to 1.54). Members of a multiple birth had a reduced incidence of all three allergic diseases. Birth order and multiple birth effects were independent of sex, maternal age, consulting behaviour, and parental allergy and smoking habit. CONCLUSIONS The presence of older siblings and being a member of a multiple birth appears to protect against the development of eczema, hay fever, and asthma diagnosed after the age of 2. In contrast, the presence of older siblings increases the incidence of early asthma.
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Affiliation(s)
- T M McKeever
- Division of Respiratory Medicine, University of Nottingham, UK.
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Lewis SA, Cowan NJ. Purification of prefoldin. Methods Mol Biol 2001; 140:179-84. [PMID: 11484487 DOI: 10.1385/1-59259-061-6:179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- S A Lewis
- Department of Biochemistry, NYU Medical Center, New York, NY, USA
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Lewis SA. Long-term effects of urea on urothelial barrier function. Urology 2001; 57:113. [PMID: 11378085 DOI: 10.1016/s0090-4295(01)01048-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- S A Lewis
- Department of Physiology and Biophysics, University of Texas Medical Branch, Galveston, Texas, USA
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Walsh LJ, Wong CA, Oborne J, Cooper S, Lewis SA, Pringle M, Hubbard R, Tattersfield AE. Adverse effects of oral corticosteroids in relation to dose in patients with lung disease. Thorax 2001; 56:279-84. [PMID: 11254818 PMCID: PMC1746020 DOI: 10.1136/thorax.56.4.279] [Citation(s) in RCA: 164] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND The adverse effects of oral corticosteroids are widely recognised but there are few quantitative data on which to base advice to patients. In a two part cross sectional study we compared adverse effects in patients with lung disease taking oral corticosteroids and control subjects and related the adverse effects to corticosteroid dose in the patient group. METHODS Data on oral corticosteroid use, lifestyle, fractures, and other possible adverse effects were collected by questionnaire and compared between a community based cohort of patients taking continuous or frequent intermittent oral corticosteroids for asthma, chronic obstructive pulmonary disease, or alveolitis and age and sex matched control subjects. Dose related effects were explored in the corticosteroid group using cumulative dose quartiles and multiple logistic regression. RESULTS A total of 367 patients (> or = 50 years, 48% female) and 734 control subjects completed the questionnaire. The cumulative incidence of fractures since the time of diagnosis was 23% for patients taking oral corticosteroids and 15% in the control group (odds ratio (OR) 1.8; 95% confidence interval (CI) 1.3 to 2.6). Patients were more likely to have had a fracture of the vertebrae (OR 10; 95% CI 2.9 to 34), hip (OR 6; 95% CI 1.2 to 30), and ribs or sternum (OR 3.2, 95% CI 1.6 to 6.6) than control subjects. They also reported a significant increase in cataracts, use of antacids, muscle weakness, back pain, bruising, oral candidiasis, and having fewer teeth. The effects of oral corticosteroids were dose related: the odds ratio for patients in the highest compared with the lowest cumulative dose quartile (median prednisolone dose 61 g versus 5 g) ranged from 2 for all fractures to 9 for vertebral fractures and bruising. CONCLUSIONS By quantifying the morbidity associated with the use of oral corticosteroids, this study should help to rationalise their long term use.
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Affiliation(s)
- L J Walsh
- Division of Respiratory Medicine, City Hospital, Nottingham NG5 1PB, UK.
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Lewis SA, Weiss ST, Platts-Mills TA, Syring M, Gold DR. Association of specific allergen sensitization with socioeconomic factors and allergic disease in a population of Boston women. J Allergy Clin Immunol 2001; 107:615-22. [PMID: 11295648 DOI: 10.1067/mai.2001.113523] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Socioeconomic differences in allergic disease prevalence have been reported; asthma has been associated with poverty in the United States and hay fever and eczema with relative affluence elsewhere. It is not yet established to what degree such differences in disease prevalence reflect patterns of sensitization and specific allergen sensitivities. OBJECTIVE We analyzed specific and total IgE measurements in a sample of 458 women, enriched for allergic disease, from the metropolitan Boston area to establish the relation of allergen sensitization to markers of socioeconomic status (SES) and to the prevalence and socioeconomic pattern of allergic disease in this community. METHODS Total and specific IgE antibodies were measured with the UNICAP System; self-reported allergic disease, household income, education, and race-ethnicity were ascertained with a questionnaire; and a further marker of poverty (percentage living below the poverty level) in the women's area of residence was established on the basis of zip codes. Analysis was performed with SAS statistical software. RESULTS Markers of low SES were univariately associated with increases in total IgE, number of allergen sensitizations, and levels of specific IgE. Socioeconomic differences in sensitization to cockroach (35% vs 6% in the highest and lowest poverty areas), animal (44% vs 26%), and ragweed (49% vs 23%) allergens were most marked. Sensitization primarily to indoor inhalant allergens (not ragweed or ryegrass) were associated with an increased risk of asthma, even after adjustment for SES. CONCLUSION We have demonstrated a socioeconomic gradient in sensitization that concords with increased rates of asthma in less affluent communities in this population.
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Affiliation(s)
- S A Lewis
- Channing Laboratory, Brigham and Women's Hospital and the Harvard Medical School, Harvard School of Public Health, Boston, MA, USA
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Aubert B, Boutigny D, De Bonis I, Gaillard JM, Jeremie A, Karyotakis Y, Lees JP, Robbe P, Tisserand V, Palano A, Chen GP, Chen JC, Qi ND, Rong G, Wang P, Zhu YS, Eigen G, Reinertsen PL, Stugu B, Abbott B, Abrams GS, Borgland AW, Breon AB, Brown DN, Button-Shafer J, Cahn RN, Clark AR, Dardin S, Day C, Dow SF, Elioff T, Fan Q, Gaponenko I, Gill MS, Goozen FR, Gowdy SJ, Gritsan A, Groysman Y, Jacobsen RG, Jared RC, Kadel RW, Kadyk J, Karcher A, Kerth LT, Kipnis I, Kluth S, Kolomensky YG, Kral JF, Lafever R, LeClerc C, Levi ME, Lewis SA, Lionberger C, Liu T, Long M, Lynch G, Marino M, Marks K, Meyer AB, Mokhtarani A, Momayezi M, Nyman M, Oddone PJ, Ohnemus J, Oshatz D, Patton S, Perazzo A, Peters C, Pope W, Pripstein M, Quarrie DR, Rasson JE, Roe NA, Romosan A, Ronan MT, Shelkov VG, Stone R, Telnov AV, von der Lippe H, Weber T, Wenzel WA, Zisman MS, Bright-Thomas PG, Harrison TJ, Hawkes CM, Kirk A, Knowles DJ, O'Neale SW, Watson AT, Watson NK, Deppermann T, Koch H, Krug J, Kunze M, Lewandowski B, Peters K, Schmuecker H, Steinke M, Andress JC, Barlow NR, Bhimji W, Chevalier N, Clark PJ, Cottingham WN, De Groot N, Dyce N, Foster B, Mass A, McFall JD, Wallom D, Wilson FF, Abe K, Hearty C, Mattison TS, McKenna JA, Thiessen D, Camanzi B, Jolly S, McKemey AK, Tinslay J, Blinov VE, Bukin AD, Bukin DA, Buzykaev AR, Dubrovin MS, Golubev VB, Ivanchenko VN, Kolachev GM, Korol AA, Kravchenko EA, Onuchin AP, Salnikov AA, Serednyakov SI, Skovpen YI, Telnov VI, Yushkov AN, Lankford AJ, Mandelkern M, McMahon S, Stoker DP, Ahsan A, Buchanan C, Chun S, MacFarlane DB, Prell S, Rahatlou S, Raven G, Sharma V, Burke S, Campagnari C, Dahmes B, Hale D, Hart PA, Kuznetsova N, Kyre S, Levy SL, Long O, Lu A, Richman JD, Verkerke W, Witherell M, Yellin S, Beringer J, Dorfan DE, Eisner AM, Frey A, Grillo AA, Grothe M, Heusch CA, Johnson RP, Kroeger W, Lockman WS, Pulliam T, Sadrozinski H, Schalk T, Schmitz RE, Schumm BA, Seiden A, Spencer EN, Turri M, Walkowiak W, Williams DC, Chen E, Dubois-Felsmann GP, Dvoretskii A, Hanson JE, Hitlin DG, Metzler S, Oyang J, Porter FC, Ryd A, Samuel A, Weaver M, Yang S, Zhu RY, Devmal S, Geld TL, Jayatilleke S, Jayatilleke SM, Mancinelli G, Meadows BT, Sokoloff MD, Bloom P, Fahey S, Ford WT, Gaede F, van Hoek WC, Johnson DR, Michael AK, Nauenberg U, Olivas A, Park H, Rankin P, Roy J, Sen S, Smith JG, Wagner DL, Blouw J, Harton JL, Krishnamurthy M, Soffer A, Toki WH, Warner DW, Wilson RJ, Zhang J, Brandt T, Brose J, Colberg T, Dahlinger G, Dickopp M, Dubitzky RS, Eckstein P, Futterschneider H, Krause R, Maly E, Müller-Pfefferkorn R, Otto S, Schubert KR, Schwierz R, Spaan B, Wilden L, Behr L, Bernard D, Bonneaud GR, Brochard F, Cohen-Tanugi J, Ferrag S, Fouque G, Gastaldi F, Matricon P, Mora de Freitas P, Renard C, Roussot E, T'Jampens S, Thiebaux C, Vasileiadis G, Verderi M, Anjomshoaa A, Bernet R, Di Lodovico F, Khan A, Muheim F, Playfer S, Swain JE, Falbo M, Bozzi C, Dittongo S, Folegani M, Piemontese L, Treadwell E, Anulli F, Baldini-Ferroli R, Calcaterra A, de Sangro R, Falciai D, Finocchiaro G, Patteri P, Peruzzi IM, Piccolo M, Xie Y, Zallo A, Bagnasco S, Buzzo A, Contri R, Crosetti G, Lo Vetere M, Macri M, Monge MR, Pallavicini M, Passaggio S, Pastore FC, Patrignani C, Pia MG, Robutti E, Santroni A, Morii M, Bartoldus R, Dignan T, Hamilton R, Mallik U, Cochran J, Crawley HB, Fischer PA, Lamsa J, McKay R, Meyer WT, Rosenberg EI, Albert JN, Beigbeder C, Benkebil M, Breton D, Cizeron R, Du S, Grosdidier G, Hast C, Höcker A, LePeltier V, Lutz AM, Plaszczynski S, Schune MH, Trincaz-Duvoid S, Truong K, Valassi A, Wormser G, Bionta RM, Brigljević V, Brooks A, Fackler O, Fujino D, Lange DJ, Mugge M, O'Connor TG, Pedrotti B, Shi X, van Bibber K, Wenaus TJ, Wright DM, Wuest CR, Yamamoto B, Carroll M, Fry JR, Gabathuler E, Gamet R, George M, Kay M, Payne DJ, Sloane RJ, Touramanis C, Aspinwall ML, Bowerman DA, Dauncey PD, Egede U, Eschrich I, Gunawardane NJ, Martin R, Nash JA, Price DR, Sanders P, Smith D, Azzopardi DE, Back JJ, Dixon P, Harrison PF, Newman-Coburn D, Potter RJ, Shorthouse HW, Strother P, Vidal PB, Williams MI, Cowan G, George S, Green MG, Kurup A, Marker CE, McGrath P, McMahon TR, Salvatore F, Scott I, Vaitsas G, Brown D, Davis CL, Ford K, Li Y, Pavlovich J, Allison J, Barlow RJ, Boyd JT, Fullwood J, Jackson F, Lafferty GD, Savvas N, Simopoulos ET, Thompson RJ, Weatherall JH, Bard R, Farbin A, Jawahery A, Lillard V, Olsen J, Roberts DA, Schieck JR, Blaylock G, Dallapiccola C, Flood KT, Hertzbach SS, Kofler R, Lin CS, Staengle H, Willocq S, Wittlin J, Brau B, Cowan R, Sciolla G, Taylor F, Yamamoto RK, Britton DI, Milek M, Patel PM, Trischuk J, Lanni F, Palombo F, Bauer JM, Booke M, Cremaldi L, Eschenberg V, Kroeger R, Reep M, Reidy J, Sanders DA, Summers DJ, Beaulieu M, Martin JP, Nief JY, Seitz R, Taras P, Zacek V, Nicholson H, Sutton CS, Cavallo N, Cartaro C, De Nardo G, Fabozzi F, Gatto C, Lista L, Paolucci P, Piccolo D, Sciacca C, LoSecco JM, Alsmiller JR, Gabriel TA, Handler T, Heck J, Brau JE, Frey R, Iwasaki M, Sinev NB, Strom D, Borsato E, Colecchia F, Dal Corso F, Galeazzi F, Margoni M, Marzolla M, Michelon G, Morandin M, Posocco M, Rotondo M, Simonetto F, Stroili R, Torassa E, Voci C, Bailly P, Benayoun M, Briand H, Chauveau J, David P, De La Vaissière C, Del Buono L, Genat JF, Hamon O, Le Diberder F, Lebbolo H, Leruste P, Lory J, Martin L, Roos L, Stark J, Versillé S, Zhang B, Manfredi PF, Ratti L, Re V, Speziali V, Frank ED, Gladney L, Guo QH, Panetta JH, Angelini C, Batignani G, Bettarini S, Bondioli M, Bosi F, Carpinelli M, Forti F, Giorgi MA, Lusiani A, Martinez-Vidal F, Morganti M, Neri N, Paoloni E, Rama M, Rizzo G, Sandrelli F, Simi G, Triggiani G, Walsh J, Hairre M, Judd D, Paick K, Turnbull L, Wagoner DE, Albert J, Bula C, Fernholz R, Lu C, McDonald KT, Miftakov V, Sands B, Schaffner SF, Smith AJ, Tumanov A, Varnes EW, Bronzini F, Buccheri A, Bulfon C, Cavoto G, del Re D, Faccini R, Ferrarotto F, Ferroni F, Fratini K, Lamanna E, Leonardi E, Mazzoni MA, Morganti S, Piredda G, Safai Tehrani F, Serra M, Voena C, Waldi R, Jacques PF, Kalelkar M, Plano RJ, Adye T, Claxton B, Franek B, Galagedera S, Geddes NI, Gopal GP, Lidbury J, Xella SM, Aleksan R, Besson P, Bourgeois P, De Domenico G, Emery S, Gaidot A, Ganzhur SF, Gosset L, Hamel de Monchenault G, Kozanecki W, Langer M, London GW, Mayer B, Serfass B, Vasseur G, Yeche C, Zito M, Copty N, Purohit MV, Singh H, Yumiceva FX, Adam I, Anthony PL, Aston D, Baird K, Bartelt J, Becla J, Bell R, Bloom E, Boeheim CT, Boyarski AM, Boyce RF, Bulos F, Burgess W, Byers B, Calderini G, Claus R, Convery MR, Coombes R, Cottrell L, Coupal DP, Coward DH, Craddock WW, DeStaebler H, Dorfan J, Doser M, Dunwoodie W, Ecklund S, Fieguth TH, Field RC, Freytag DR, Glanzman T, Godfrey GL, Grosso P, Haller G, Hanushevsky A, Harris J, Hasan A, Hewett JL, Himel T, Huffer ME, Innes WR, Jessop CP, Kawahara H, Keller L, Kelsey MH, Kim P, Klaisner LA, Kocian ML, Krebs HJ, Kunz PF, Langenegger U, Langeveld W, Leith DW, Louie SK, Luitz S, Luth V, Lynch HL, MacDonald J, Manzin G, Mariske H, McCulloch M, McShurley D, Menke S, Messner R, Metcalfe S, Moffeit KC, Mount R, Muller DR, Nelson D, Nordby M, O'Grady CP, O'Neill FG, Oxoby G, Pavel T, Perl J, Petrak S, Putallaz G, Quinn H, Raines PE, Ratcliff BN, Reif R, Robertson SH, Rochester LS, Roodman A, Russell JJ, Sapozhnikov L, Saxton OH, Schietinger T, Schindler RH, Schwiening J, Seeman JT, Serbo VV, Skarpass K, Snyder A, Soha A, Spanier SM, Stahl A, Stelzer J, Su D, Sullivan MK, Talby M, Tanaka HA, Va'vra J, Wagner SR, Weinstein AJ, White JL, Wienands U, Wisniewski WJ, Young CC, Zioulas G, Burchat PR, Cheng CH, Kirkby D, Meyer TI, Roat C, De Silva A, Henderson R, Berridge S, Bugg W, Cohn H, Hart E, Weidemann AW, Benninger T, Izen JM, Kitayama I, Lou XC, Turcotte M, Bianchi F, Bona M, Di Girolamo B, Gamba D, Smol A, Zanin D, Bosisio L, Della Ricca G, Lanceri L, Pompili A, Poropat P, Vuagnin G, Panvini RS, Brown CM, Kowalewski R, Roney JM, Band HR, Charles E, Dasu S, Elmer P, Hu H, Johnson JR, Nielsen J, Orejudos W, Pan Y, Prepost R, Scott IJ, von Wimmersperg-Toeller JH, Wu SL, Yu Z, Zobernig H, Kordich TM, Moore TB, Neal H. Measurement of CP-violating asymmetries in B0 decays to CP eigenstates. Phys Rev Lett 2001; 86:2515-2522. [PMID: 11289970 DOI: 10.1103/physrevlett.86.2515] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2001] [Indexed: 05/23/2023]
Abstract
We present measurements of time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurement uses a data sample of 23x10(6) Upsilon(4S)-->BbarB decays collected by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we find events in which one neutral B meson is fully reconstructed in a CP eigenstate containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2beta, is derived from the decay time distributions in such events. The result is sin2beta = 0.34+/-0.20 (stat)+/-0.05 (syst).
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Affiliation(s)
- B Aubert
- Laboratoire de Physique des Particules, Annecy-le-Vieux, France
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Lewis LA, Smithwick RW, Devault GL, Bolinger B, Lewis SA. Processes involved in the development of latent fingerprints using the cyanoacrylate fuming method. J Forensic Sci 2001; 46:241-6. [PMID: 11305425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Chemical processes involved in the development of latent fingerprints using the cyanoacrylate fuming method have been studied. Two major types of latent prints have been investigated-clean and oily prints. Scanning electron microscopy (SEM) has been used as a tool for determining the morphology of the polymer developed separately on clean and oily prints after cyanoacrylate fuming. A correlation between the chemical composition of an aged latent fingerprint, prior to development, and the quality of a developed fingerprint has been observed in the morphology. The moisture in the print prior to fuming has been found to be more important than the moisture in the air during fuming for the development of a useful latent print. In addition, the amount of time required to develop a high quality latent print has been found to be within 2 min. The cyanoacrylate polymerization process is extremely rapid. When heat is used to accelerate the fuming process, typically a period of 2 min is required to develop the print. The optimum development time depends upon the concentration of cyanoacrylate vapors within the enclosure.
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Affiliation(s)
- L A Lewis
- Development Chemists, Analytical Chemistry Organization, Lockheed Martin Energy Systems, Inc., Oak Ridge, TN, USA
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Abstract
OBJECTIVE To evaluate lemniscal pathways in patients with central pain (CP) by use of a novel tactile illusion (TI)-producing technique. PATIENTS AND METHODS Somatosensory (SS) and TI testing was performed on the unaffected and affected wrists of 27 patients with unilateral central nervous system injury and unilateral CP. Data on TI testing-naive control subjects were used to adjust for a learning effect. RESULTS Testing in CP patients with cervical and brainstem injuries revealed predominantly unchanged or decreased SS perception on the affected side compared with the unaffected side. The majority of cervical- and brainstem-injured subjects with CP had improved TI performance on the affected side compared with the unaffected side. All the thalamic-injured and most of the suprathalamic-injured CP patients had altered SS testing with either decreased or increased SS perception noted. In these same CP patients the majority had reduced TI perception on the affected side compared with the unaffected side. Unexpectedly, perseveration of numbers was noted in patients with Dejerine-Roussy syndrome, and expanded TI testing was performed to better define this observation. CONCLUSION Cervical spinal cord-injured CP patients may have improved TI perception, whereas the majority of patients with supraspinal injuries and CP have reduced SS and TI perception. A unique sensory phenomenon of TI perseveration was observed in some patients with Dejerine-Roussy syndrome.
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Affiliation(s)
- G R Gonzales
- Department of Neurology, Mayo Clinic, Scottsdale, Ariz, USA.
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Lewis SA, Pavord ID, Stringer JR, Knox AJ, Weiss ST, Britton JR. The relation between peripheral blood leukocyte counts and respiratory symptoms, atopy, lung function, and airway responsiveness in adults. Chest 2001; 119:105-14. [PMID: 11157591 DOI: 10.1378/chest.119.1.105] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
STUDY OBJECTIVES Eosinophils and neutrophils play major roles, respectively, in the pathogenesis of asthma and COPD, and it is well recognized that levels of these cells in peripheral blood are increased in relation to their pulmonary involvement. However, the relation between peripheral blood cell counts of the other major leukocyte groups and these lung diseases or markers of allergy or airflow obstruction is less clear. We have therefore investigated the association between peripheral blood levels of eosinophils, neutrophils, basophils, monocytes, and lymphocytes and the occurrence of chronic respiratory symptoms, atopy, lung function, and bronchial hyperresponsiveness, and the modifying effect of age, in adults. DESIGN A cross-sectional general population study. SETTING Data on > 2,000 British adults, who originally participated in a study of diet and lung health, were analyzed using multiple linear and logistic regression to adjust for potential confounders, including age, sex, and smoking history. RESULTS We found that, like eosinophils, the peripheral basophil count was increased in relation to asthma and associated symptoms, and to airway hyperreactivity and increased total IgE, but differed from eosinophils in that basophils were unrelated to atopy. Monocytes were predominantly associated with symptoms indicative of obstructive airway disease, in similar relation to neutrophils, but both of these leukocyte counts were also increased in asthma patients in older age groups. Lymphocyte counts were unrelated to any objective or subjective marker of disease. CONCLUSIONS If peripheral blood cell counts reflect pulmonary involvement of these leukocyte groups, basophils and monocytes may play a distinct role in the pathogenesis of allergic and nonallergic respiratory disease.
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Affiliation(s)
- S A Lewis
- Division of Respiratory Medicine, City Hospital, University of Nottingham, Nottingham, UK
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Lewis SA, Corden JM, Forster GE, Newlands M. Combined effects of aerobiological pollutants, chemical pollutants and meteorological conditions on asthma admissions and A & E attendances in Derbyshire UK, 1993-96. Clin Exp Allergy 2000; 30:1724-32. [PMID: 11122210 DOI: 10.1046/j.1365-2222.2000.00947.x] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND The effect of outdoor aeroallergen exposure in asthma may be enhanced by air pollutants, including ozone, nitrogen dioxide and particulates, and by certain weather conditions. It is not yet established whether these interactions are important in determining asthma morbidity at the population level. OBJECTIVE We have investigated the joint effects of aeroallergens, rainfall, thunderstorms and outdoor air pollutants on daily asthma admissions and Accident and Emergency (A & E) attendance using routinely collected data between 1993 and 1996 from Derby in central England. METHODS Daily counts during the aeroallergen season of grass and birch pollen, basidiospores, Didymella, Alternaria and Cladosporium, maximum 1 hour ozone and nitrogen dioxide and daily average black smoke measurements, all made in the vicinity of the city centre, were categorized in tertiles. Rainfall was classified as dry, light (</= 2 mm) or heavy (> 2 mm). The modifying effect of outdoor pollutant levels, and rainfall or the occurrence of a thunderstorm, upon the effects of individual aeroallergens on asthma admissions and A & E attendance were investigated by fitting appropriate interactions in log linear autoregression models with adjustment for potential confounders. RESULTS We found a significant interaction between the effects of grass pollen and weather conditions upon A & E attendance, such that the increase with grass pollen count was most marked on days of light rainfall (adjusted rate ratio for >/= 50 vs < 10 grains/m3 at lag 2 days = 2.1, 95% CI 1.4, 3.3). Asthma admissions increased with Cladosporium count. We found no statistically significant interactions between effects of any individual aeroallergen and outdoor air pollutant upon either measure of asthma morbidity. CONCLUSIONS Rainfall and thunderstorms are important effect modifiers in the relation between grass pollen and measures of acute asthma morbidity. Interactions between ambient levels of aeroallergens and chemical pollutants in the Derby area do not play a major role in determining asthma admissions and A & E attendance.
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Affiliation(s)
- S A Lewis
- Division of Respiratory Medicine, University of Nottingham, City Hospital, Nottingham, UK
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Lewis SA, Kleine TJ. Urea modifies the permeability of the mammalian urothelium. J Urol 2000; 164:219-23. [PMID: 10840463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
PURPOSE This study investigated the effects of mucosal (urine side) and serosal (blood side) urea on the permeability properties of the in vitro mammalian urinary bladder epithelium. MATERIALS AND METHODS The permeability properties of the rabbit urinary bladder epithelium were studied in modified Ussing chambers using electrophysiological techniques. RESULTS Addition of two molar urea to the mucosal solution did not cause a significant change in the short circuit current (Isc, a measure of the ion transport capacity of the epithelium), or the transepithelial conductance (Gt, a measure of the ability of ions to diffuse across the epithelium). In contrast, addition of 0.5 M urea to the serosal solution caused an increase in Gt of approximately 35 microS/cm.2 as well as an increase in Isc over a 5 minute period. The site of the conductance increase by short-term serosal urea was at the apical membrane and not at the tight junctions. The urea-induced conductance completely reversed upon removal of urea, was non-selective, and the magnitude was voltage dependent. Long term serosal urea (greater than 30 minutes) resulted in an irreversible increase in transepithelial conductance. Mucosal urea altered the time course but not the magnitude of the serosal urea-induced conductance. CONCLUSIONS The ion permeability of the mammalian urinary bladder is increased by serosal urea. At short times the increase is at the apical membrane, while at long times the increase is at the tight junctions. The presence of mucosal urea slows the loss of urothelial barrier function caused by serosal urea.
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Affiliation(s)
- S A Lewis
- Department of Physiology and Biophysics, University of Texas Medical Branch, Galveston Texas 77555-0641, USA
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