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Li Y, Xiao X, Li J, Han Y, Cheng C, Fernandes GF, Slewitzke SE, Rosenberg SM, Zhu M, Byun J, Bossé Y, McKay JD, Albanes D, Lam S, Tardon A, Chen C, Bojesen SE, Landi MT, Johansson M, Risch A, Bickeböller H, Wichmann HE, Christiani DC, Rennert G, Arnold SM, Goodman GE, Field JK, Davies MP, Shete S, Marchand LL, Liu G, Hung RJ, Andrew AS, Kiemeney LA, Sun R, Zienolddiny S, Grankvist K, Johansson M, Caporaso NE, Cox A, Hong YC, Lazarus P, Schabath MB, Aldrich MC, Schwartz AG, Gorlov I, Purrington KS, Yang P, Liu Y, Bailey-Wilson JE, Pinney SM, Mandal D, Willey JC, Gaba C, Brennan P, Xia J, Shen H, Amos CI. Lung Cancer in Ever- and Never-Smokers: Findings from Multi-Population GWAS Studies. Cancer Epidemiol Biomarkers Prev 2024; 33:389-399. [PMID: 38180474 PMCID: PMC10905670 DOI: 10.1158/1055-9965.epi-23-0613] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 08/03/2023] [Accepted: 01/03/2024] [Indexed: 01/06/2024] Open
Abstract
BACKGROUND Clinical, molecular, and genetic epidemiology studies displayed remarkable differences between ever- and never-smoking lung cancer. METHODS We conducted a stratified multi-population (European, East Asian, and African descent) association study on 44,823 ever-smokers and 20,074 never-smokers to identify novel variants that were missed in the non-stratified analysis. Functional analysis including expression quantitative trait loci (eQTL) colocalization and DNA damage assays, and annotation studies were conducted to evaluate the functional roles of the variants. We further evaluated the impact of smoking quantity on lung cancer risk for the variants associated with ever-smoking lung cancer. RESULTS Five novel independent loci, GABRA4, intergenic region 12q24.33, LRRC4C, LINC01088, and LCNL1 were identified with the association at two or three populations (P < 5 × 10-8). Further functional analysis provided multiple lines of evidence suggesting the variants affect lung cancer risk through excessive DNA damage (GABRA4) or cis-regulation of gene expression (LCNL1). The risk of variants from 12 independent regions, including the well-known CHRNA5, associated with ever-smoking lung cancer was evaluated for never-smokers, light-smokers (packyear ≤ 20), and moderate-to-heavy-smokers (packyear > 20). Different risk patterns were observed for the variants among the different groups by smoking behavior. CONCLUSIONS We identified novel variants associated with lung cancer in only ever- or never-smoking groups that were missed by prior main-effect association studies. IMPACT Our study highlights the genetic heterogeneity between ever- and never-smoking lung cancer and provides etiologic insights into the complicated genetic architecture of this deadly cancer.
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Affiliation(s)
- Yafang Li
- Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, Texas
- Section of Epidemiology and Population Sciences, Department of Medicine, Baylor College of Medicine, Houston, Texas
- Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, Texas
| | - Xiangjun Xiao
- Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, Texas
| | - Jianrong Li
- Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, Texas
| | - Younghun Han
- Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, Texas
- Section of Epidemiology and Population Sciences, Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Chao Cheng
- Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, Texas
- Section of Epidemiology and Population Sciences, Department of Medicine, Baylor College of Medicine, Houston, Texas
- Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, Texas
| | - Gail F. Fernandes
- Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, Texas
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Shannon E. Slewitzke
- Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, Texas
- Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, Texas
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Susan M. Rosenberg
- Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, Texas
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Meng Zhu
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing, P.R. China
| | - Jinyoung Byun
- Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, Texas
- Section of Epidemiology and Population Sciences, Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Yohan Bossé
- Institut universitaire de cardiologie et de pneumologie de Québec, Department of Molecular Medicine, Laval University, Quebec City, Canada
| | - James D. McKay
- Section of Genetics, International Agency for Research on Cancer, World Health Organization, Lyon, France
| | - Demetrios Albanes
- Division of Cancer Epidemiology and Genetics, NCI, NIH, Bethesda, Maryland
| | - Stephen Lam
- Department of Integrative Oncology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Adonina Tardon
- Public Health Department, University of Oviedo, ISPA and CIBERESP, Asturias, Spain
| | - Chu Chen
- Program in Epidemiology, Public Health Sciences Division, Fred Hutchinson Cancer Center, Seattle, Washington
| | - Stig E. Bojesen
- Department of Clinical Biochemistry, Copenhagen University Hospital, Copenhagen, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Maria T. Landi
- Division of Cancer Epidemiology and Genetics, NCI, NIH, Bethesda, Maryland
| | - Mattias Johansson
- Section of Genetics, International Agency for Research on Cancer, World Health Organization, Lyon, France
| | - Angela Risch
- Thoraxklinik at University Hospital Heidelberg, Heidelberg, Germany
- Translational Lung Research Center Heidelberg (TLRC-H), Heidelberg, Germany
- University of Salzburg and Cancer Cluster Salzburg, Salzburg, Austria
| | - Heike Bickeböller
- Department of Genetic Epidemiology, University Medical Center, Georg-August-University Göttingen, Göttingen, Germany
| | | | - David C. Christiani
- Departments of Environmental Health and Epidemiology, Harvard TH Chan School of Public Health, Boston, Massachusetts
| | - Gad Rennert
- Clalit National Cancer Control Center at Carmel Medical Center and Technion Faculty of Medicine, Haifa, Israel
| | | | | | - John K. Field
- Institute of Translational Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Michael P.A. Davies
- Institute of Translational Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Sanjay Shete
- Department of Biostatistics, The University of Texas, MD Anderson Cancer Center, Houston, Texas
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Loïc Le Marchand
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, Hawaii
| | - Geoffrey Liu
- University Health Network- The Princess Margaret Cancer Centre, Toronto, California
| | - Rayjean J. Hung
- Luenfeld-Tanenbaum Research Institute, Sinai Health System, Toronto, Canada
- Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Canada
| | - Angeline S. Andrew
- Departments of Epidemiology and Community and Family Medicine, Dartmouth College, Hanover, New Hampshire
| | | | - Ryan Sun
- Department of Biostatistics, The University of Texas, MD Anderson Cancer Center, Houston, Texas
| | | | - Kjell Grankvist
- Department of Medical Biosciences, Umeå University, Umeå, Sweden
| | | | - Neil E. Caporaso
- Division of Cancer Epidemiology and Genetics, NCI, NIH, Bethesda, Maryland
| | - Angela Cox
- Department of Oncology and Metabolism, University of Sheffield, Sheffield, United Kingdom
| | - Yun-Chul Hong
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of South Korea
| | - Philip Lazarus
- Department of Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington
| | - Matthew B. Schabath
- Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | - Melinda C. Aldrich
- Department of Thoracic Surgery, Division of Epidemiology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Ann G. Schwartz
- Department of Oncology, Wayne State University School of Medicine, Detroit, Michigan
- Karmanos Cancer Institute, Detroit, Michigan
| | - Ivan Gorlov
- Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, Texas
- Section of Epidemiology and Population Sciences, Department of Medicine, Baylor College of Medicine, Houston, Texas
- Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, Texas
| | - Kristen S. Purrington
- Department of Oncology, Wayne State University School of Medicine, Detroit, Michigan
- Karmanos Cancer Institute, Detroit, Michigan
| | - Ping Yang
- Division of Epidemiology, Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Yanhong Liu
- Section of Epidemiology and Population Sciences, Department of Medicine, Baylor College of Medicine, Houston, Texas
- Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, Texas
| | | | - Susan M. Pinney
- University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Diptasri Mandal
- Louisiana State University Health Sciences Center, New Orleans, Louisiana
| | - James C. Willey
- College of Medicine and Life Sciences, University of Toledo, Toledo, Ohio
| | - Colette Gaba
- The University of Toledo College of Medicine, Toledo, Ohio
| | - Paul Brennan
- Institut universitaire de cardiologie et de pneumologie de Québec, Department of Molecular Medicine, Laval University, Quebec City, Canada
| | - Jun Xia
- Creighton University School of Medicine, Omaha, Nebraska
| | - Hongbing Shen
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing, P.R. China
| | - Christopher I. Amos
- Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, Texas
- Section of Epidemiology and Population Sciences, Department of Medicine, Baylor College of Medicine, Houston, Texas
- Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, Texas
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Schmid S, Jiang M, Brown MC, Fares A, Garcia M, Soriano J, Dong M, Thomas S, Kohno T, Leal LF, Diao N, Xie J, Wang Z, Zaridze D, Holcatova I, Lissowska J, Świątkowska B, Mates D, Savic M, Wenzlaff AS, Harris CC, Caporaso NE, Ma H, Fernandez-Tardon G, Barnett MJ, Goodman G, Davies MP, Pérez-Ríos M, Taylor F, Duell EJ, Schoettker B, Brenner H, Andrew A, Cox A, Ruano-Ravina A, Field JK, Le Marchand L, Wang Y, Chen C, Tardon A, Shete S, Schabath MB, Shen H, Landi MT, Ryan BM, Schwartz AG, Qi L, Sakoda LC, Brennan P, Yang P, Zhang J, Christiani DC, Reis RM, Shiraishi K, Hung RJ, Xu W, Liu G. Accounting for EGFR Mutations in Epidemiologic Analyses of Non-Small Cell Lung Cancers: Examples Based on the International Lung Cancer Consortium Data. Cancer Epidemiol Biomarkers Prev 2022; 31:679-687. [PMID: 35027437 PMCID: PMC9063819 DOI: 10.1158/1055-9965.epi-21-0747] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 10/28/2021] [Accepted: 01/05/2022] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Somatic EGFR mutations define a subset of non-small cell lung cancers (NSCLC) that have clinical impact on NSCLC risk and outcome. However, EGFR-mutation-status is often missing in epidemiologic datasets. We developed and tested pragmatic approaches to account for EGFR-mutation-status based on variables commonly included in epidemiologic datasets and evaluated the clinical utility of these approaches. METHODS Through analysis of the International Lung Cancer Consortium (ILCCO) epidemiologic datasets, we developed a regression model for EGFR-status; we then applied a clinical-restriction approach using the optimal cut-point, and a second epidemiologic, multiple imputation approach to ILCCO survival analyses that did and did not account for EGFR-status. RESULTS Of 35,356 ILCCO patients with NSCLC, EGFR-mutation-status was available in 4,231 patients. A model regressing known EGFR-mutation-status on clinical and demographic variables achieved a concordance index of 0.75 (95% CI, 0.74-0.77) in the training and 0.77 (95% CI, 0.74-0.79) in the testing dataset. At an optimal cut-point of probability-score = 0.335, sensitivity = 69% and specificity = 72.5% for determining EGFR-wildtype status. In both restriction-based and imputation-based regression analyses of the individual roles of BMI on overall survival of patients with NSCLC, similar results were observed between overall and EGFR-mutation-negative cohort analyses of patients of all ancestries. However, our approach identified some differences: EGFR-mutated Asian patients did not incur a survival benefit from being obese, as observed in EGFR-wildtype Asian patients. CONCLUSIONS We introduce a pragmatic method to evaluate the potential impact of EGFR-status on epidemiological analyses of NSCLC. IMPACT The proposed method is generalizable in the common occurrence in which EGFR-status data are missing.
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Affiliation(s)
- Sabine Schmid
- The Princess Margaret Cancer Centre and University Health Network, University of Toronto, Toronto, ON, Canada
- Department of Medical Oncology, Cantonal Hospital St.Gallen, St.Gallen, Switzerland
| | - Mei Jiang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - M. Catherine Brown
- The Princess Margaret Cancer Centre and University Health Network, University of Toronto, Toronto, ON, Canada
| | - Aline Fares
- Division of Medical Oncology, Hospital de Base de São José do Rio Preto, SP, Brazil
| | - Miguel Garcia
- The Princess Margaret Cancer Centre and University Health Network, University of Toronto, Toronto, ON, Canada
| | - Joelle Soriano
- The Princess Margaret Cancer Centre and University Health Network, University of Toronto, Toronto, ON, Canada
- University of Ottawa, Ottawa, ON Canada
| | - Mei Dong
- The Princess Margaret Cancer Centre and University Health Network, University of Toronto, Toronto, ON, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Sera Thomas
- Lunenfeld-Tanenbaum Research Institute, Sinai Health Systems, Toronto, Canada
| | - Takashi Kohno
- Division of Genome Biology, National Cancer Centre Research Institute, Tokyo, Japan
| | - Leticia Ferro Leal
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, Brazil
| | - Nancy Diao
- Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Juntao Xie
- Department of Thoracic Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Zhichao Wang
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
- Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - David Zaridze
- Russian N.N. Blokhin Cancer Research Centre, Moscow, Russian Federation
| | - Ivana Holcatova
- Institute of Hygiene and Epidemiology, 1st Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Jolanta Lissowska
- Department of Cancer Epidemiology and Prevention, M. Sklodowska-Curie National Research Institute of Oncology
| | | | - Dana Mates
- National Institute of Public Health, Bucharest, Romania
| | - Milan Savic
- Department of Thoracic Surgery, Clinical Center of Serbia, Belgrade, Serbia
| | - Angela S. Wenzlaff
- Barbara Ann Karmanos Cancer Institute, Wayne State University, Detroit, MI, USA
| | - Curtis C. Harris
- Laboratory of Human Carcinogenesis, Centre for Cancer Research, National Institutes of Health, Bethesda, MD, USA
| | - Neil E. Caporaso
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Hongxia Ma
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Guillermo Fernandez-Tardon
- IUOPA, University of Oviedo, and ISPA (Health Research Institute of the Principality of Asturias) and CIBERESP, Asturias, Spain
| | - Matthew J. Barnett
- Program in Biostatistics Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | | | - Michael P.A. Davies
- Roy Castle Lung Cancer Research Programme, The University of Liverpool, Department of Molecular and Clinical Cancer Medicine, Liverpool, UK
| | - Mónica Pérez-Ríos
- Department of Preventive Medicine and Public Health, University of Santiago de Compostela, Spain
- CIBER de Epidemiología y Salud Pública, CIBERESP, Santiago de Compostela, Spain
| | - Fiona Taylor
- Department of Oncology and Metabolism, University of Sheffield Medical School, Sheffield, UK
- Sheffield Teaching Hospitals Foundation Trust, Sheffield, UK
| | - Eric J. Duell
- Catalan Institute of Oncology (ICO), Barcelona, Spain
- Bellvitge Biomedical Research Institute (IDIBELL), L’Hospitalet de Llobregat, Barcelona, Spain
| | - Ben Schoettker
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Network of Aging Research, Heidelberg University, Heidelberg, Germany
| | - Hermann Brenner
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Network of Aging Research, Heidelberg University, Heidelberg, Germany
- Division of Preventive Oncology, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT), Heidelberg, Germany
- German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | | | - Angela Cox
- Department of Oncology and Metabolism, University of Sheffield Medical School, Sheffield, UK
| | - Alberto Ruano-Ravina
- Department of Preventive Medicine and Public Health, University of Santiago de Compostela, Spain
- CIBER de Epidemiología y Salud Pública, CIBERESP, Santiago de Compostela, Spain
| | - John K. Field
- Roy Castle Lung Cancer Research Programme, The University of Liverpool, Department of Molecular and Clinical Cancer Medicine, Liverpool, UK
| | | | - Ying Wang
- American Cancer Society, Atlanta, GA, USA
| | - Chu Chen
- Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Adonina Tardon
- IUOPA, University of Oviedo, and ISPA (Health Research Institute of the Principality of Asturias) and CIBERESP, Asturias, Spain
| | - Sanjay Shete
- The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Matthew B Schabath
- Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL, USA
| | - Hongbing Shen
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Maria Teresa Landi
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Brid M. Ryan
- Laboratory of Human Carcinogenesis, Centre for Cancer Research, National Institutes of Health, Bethesda, MD, USA
| | - Ann G. Schwartz
- Barbara Ann Karmanos Cancer Institute, Wayne State University, Detroit, MI, USA
| | - Lihong Qi
- The University of California Davis Medical Sciences, Davis, California, USA
| | - Lori C. Sakoda
- Kaiser Permanente Northern California, Division of Research, Oakland, California, USA
| | - Paul Brennan
- International Agency for Research on Cancer, Lyon, France
| | - Ping Yang
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Jie Zhang
- Department of Thoracic Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
| | | | - Rui Manuel Reis
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, Brazil
- Life and Health Sciences Research Institute (ICVS), Medical School, University of Minho, Braga, Portuga
- ICVS/3B’s-PT Government Associate Laboratory, Braga, Portugal
| | - Kouya Shiraishi
- Division of Genome Biology, National Cancer Centre Research Institute, Tokyo, Japan
| | - Rayjean J. Hung
- Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
- Lunenfeld-Tanenbaum Research Institute, Sinai Health Systems, Toronto, Canada
| | - Wei Xu
- The Princess Margaret Cancer Centre and University Health Network, University of Toronto, Toronto, ON, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Geoffrey Liu
- The Princess Margaret Cancer Centre and University Health Network, University of Toronto, Toronto, ON, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
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3
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Field JK, Vulkan D, Davies MP, Baldwin DR, Brain KE, Devaraj A, Eisen T, Gosney J, Green BA, Holemans JA, Kavanagh T, Kerr KM, Ledson M, Lifford KJ, McRonald FE, Nair A, Page RD, Parmar MK, Rassl DM, Rintoul RC, Screaton NJ, Wald NJ, Weller D, Whynes DK, Williamson PR, Yadegarfar G, Gabe R, Duffy SW. Lung cancer mortality reduction by LDCT screening: UKLS randomised trial results and international meta-analysis. Lancet Reg Health Eur 2021; 10:100179. [PMID: 34806061 PMCID: PMC8589726 DOI: 10.1016/j.lanepe.2021.100179] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND The NLST reported a significant 20% reduction in lung cancer mortality with three annual low-dose CT (LDCT) screens and the Dutch-Belgian NELSON trial indicates a similar reduction. We present the results of the UKLS trial. METHODS From October 2011 to February 2013, we randomly allocated 4 055 participants to either a single invitation to screening with LDCT or to no screening (usual care). Eligible participants (aged 50-75) had a risk score (LLPv2) ≥ 4.5% of developing lung cancer over five years. Data were collected on lung cancer cases to 31 December 2019 and deaths to 29 February 2020 through linkage to national registries. The primary outcome was mortality due to lung cancer. We included our results in a random-effects meta-analysis to provide a synthesis of the latest randomised trial evidence. FINDINGS 1 987 participants in the intervention and 1 981 in the usual care arms were followed for a median of 7.3 years (IQR 7.1-7.6), 86 cancers were diagnosed in the LDCT arm and 75 in the control arm. 30 lung cancer deaths were reported in the screening arm, 46 in the control arm, (relative rate 0.65 [95% CI 0.41-1.02]; p=0.062). The meta-analysis indicated a significant reduction in lung cancer mortality with a pooled overall relative rate of 0.84 (95% CI 0.76-0.92) from nine eligible trials. INTERPRETATION The UKLS trial of single LDCT indicates a reduction of lung cancer death of similar magnitude to the NELSON and NLST trials and was included in a meta-analysis of nine randomised trials which provides unequivocal support for lung cancer screening in identified risk groups. FUNDING NIHR Health Technology Assessment programme; NIHR Policy Research programme; Roy Castle Lung Cancer Foundation.
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Affiliation(s)
- John K. Field
- Department of Molecular and Clinical Cancer Medicine, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, 6 West Derby Street, Liverpool L7 8TX, UK
| | - Daniel Vulkan
- Centre for Prevention, Detection and Diagnosis, Wolfson Institute of Population Health, Queen Mary University of London, London, UK
| | - Michael P.A. Davies
- Department of Molecular and Clinical Cancer Medicine, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, 6 West Derby Street, Liverpool L7 8TX, UK
| | - David R. Baldwin
- Respiratory Medicine Unit, David Evans Research Centre, Department of Respiratory Medicine, Nottingham University Hospitals, Nottingham, UK
| | - Kate E. Brain
- Division of Population Medicine, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK
| | - Anand Devaraj
- Department of Radiology, Royal Brompton Hospital, London, and National Heart and Lung Institute, Imperial College, London, UK
| | - Tim Eisen
- Department of Oncology, University of Cambridge, Cambridge, UK
| | - John Gosney
- Department of Pathology, Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK
| | - Beverley A. Green
- Department of Molecular and Clinical Cancer Medicine, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, 6 West Derby Street, Liverpool L7 8TX, UK
| | - John A. Holemans
- Department of Radiology, Liverpool Heart and Chest Hospital, Liverpool, UK
| | | | - Keith M. Kerr
- Department of Pathology, Aberdeen Royal Infirmary, Aberdeen, UK
| | - Martin Ledson
- Department of Respiratory Medicine, Liverpool Heart and Chest Hospital, Liverpool, UK
| | - Kate J. Lifford
- Division of Population Medicine, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK
| | - Fiona E. McRonald
- Department of Molecular and Clinical Cancer Medicine, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, 6 West Derby Street, Liverpool L7 8TX, UK
| | - Arjun Nair
- Department of Radiology, University College, London Hospital, London, UK
| | - Richard D. Page
- Department of Thoracic Surgery, Liverpool Heart and Chest Hospital, Liverpool, UK
| | | | - Doris M. Rassl
- Department of Pathology, Papworth Hospital NHS Foundation Trust, Cambridge, UK
| | - Robert C. Rintoul
- Department of Thoracic Oncology, Royal Papworth Hospital NHS Foundation Trust, Cambridge, UK
| | - Nicholas J. Screaton
- Department of Thoracic Oncology, Royal Papworth Hospital NHS Foundation Trust, Cambridge, UK
| | - Nicholas J. Wald
- Faculty of Population Health Sciences, University College London, London, UK
| | - David Weller
- School of Clinical Sciences and Community Health, University of Edinburgh, Edinburgh, UK
| | - David K. Whynes
- School of Economics, University of Nottingham, Nottingham, UK
| | | | - Gasham Yadegarfar
- Department of Molecular and Clinical Cancer Medicine, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, 6 West Derby Street, Liverpool L7 8TX, UK
| | - Rhian Gabe
- Center for Evaluation and Methods, Wolfson Institute of Population Health. Queen Mary University of London, London, UK
| | - Stephen W. Duffy
- Centre for Prevention, Detection and Diagnosis, Wolfson Institute of Population Health, Queen Mary University of London, London, UK
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4
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Kachuri L, Amos CI, McKay JD, Johansson M, Vineis P, Bueno-de-Mesquita H, Boutron-Ruault MC, Johansson M, Quirós J, Sieri S, Travis RC, Weiderpass E, Le Marchand L, Henderson BE, Wilkens L, Goodman GE, Chen C, Doherty JA, Christiani DC, Wei Y, Su L, Tworoger S, Zhang X, Kraft P, Zaridze D, Field JK, Marcus MW, Davies MP, Hyde R, Caporaso NE, Landi MT, Severi G, Giles GG, Liu G, McLaughlin JR, Li Y, Xiao X, Fehringer G, Zong X, Denroche RE, Zuzarte PC, McPherson JD, Brennan P, Hung RJ. Fine mapping of chromosome 5p15.33 based on a targeted deep sequencing and high density genotyping identifies novel lung cancer susceptibility loci. Carcinogenesis 2016; 37:96-105. [PMID: 26590902 PMCID: PMC4715236 DOI: 10.1093/carcin/bgv165] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [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] [Received: 09/02/2015] [Revised: 11/02/2015] [Accepted: 11/13/2015] [Indexed: 01/01/2023] Open
Abstract
Chromosome 5p15.33 has been identified as a lung cancer susceptibility locus, however the underlying causal mechanisms were not fully elucidated. Previous fine-mapping studies of this locus have relied on imputation or investigated a small number of known, common variants. This study represents a significant advance over previous research by investigating a large number of novel, rare variants, as well as their underlying mechanisms through telomere length. Variants for this fine-mapping study were identified through a targeted deep sequencing (average depth of coverage greater than 4000×) of 576 individuals. Subsequently, 4652 SNPs, including 1108 novel SNPs, were genotyped in 5164 cases and 5716 controls of European ancestry. After adjusting for known risk loci, rs2736100 and rs401681, we identified a new, independent lung cancer susceptibility variant in LPCAT1: rs139852726 (OR = 0.46, P = 4.73×10(-9)), and three new adenocarcinoma risk variants in TERT: rs61748181 (OR = 0.53, P = 2.64×10(-6)), rs112290073 (OR = 1.85, P = 1.27×10(-5)), rs138895564 (OR = 2.16, P = 2.06×10(-5); among young cases, OR = 3.77, P = 8.41×10(-4)). In addition, we found that rs139852726 (P = 1.44×10(-3)) was associated with telomere length in a sample of 922 healthy individuals. The gene-based SKAT-O analysis implicated TERT as the most relevant gene in the 5p15.33 region for adenocarcinoma (P = 7.84×10(-7)) and lung cancer (P = 2.37×10(-5)) risk. In this largest fine-mapping study to investigate a large number of rare and novel variants within 5p15.33, we identified novel lung and adenocarcinoma susceptibility loci with large effects and provided support for the role of telomere length as the potential underlying mechanism.
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Affiliation(s)
- Linda Kachuri
- Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, Ontario M5T 3L9, Canada
- Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario M5T 3M7, Canada
| | - Christopher I. Amos
- Department of Community and Family Medicine, Center for Genomic Medicine, Geisel School of Medicine, Dartmouth College, Lebanon, NH 03766, USA
| | - James D. McKay
- International Agency for Research on Cancer, Lyon, CEDEX 08, 69372, France
| | - Mattias Johansson
- International Agency for Research on Cancer, Lyon, CEDEX 08, 69372, France
| | - Paolo Vineis
- Human Genetics Foundation (HuGeF), 10126Torino, Italy
- Department of Epidemiology and Biostatistics, MRC-PHE Centre for Environment and Health, School of Public Health, Imperial College London, Norfolk Place, London W2 1PG, UK
| | - H.Bas Bueno-de-Mesquita
- Department for Determinants of Chronic Diseases (DCD), National Institute for Public Health and the Environment (RIVM), 3721 MA Bilthoven, The Netherlands
- Department of Gastroenterology and Hepatology, University Medical Centre, 3584 CX Utrecht, The Netherlands
- Department of Epidemiology and Biostatistics, The School of Public Health, Imperial College London, London SW7 2AZ, UK
- Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Marie-Christine Boutron-Ruault
- INSERM, Centre for Research in Epidemiology and Population Health (CESP), U1018, Lifestyle, Genes and Health: Integrative Trans-Generational Epidemiology, 94805 Villejuif, France
- Université Paris Sud, UMRS 1018 94805, Villejuif, France
- Institut Gustave RoussyF-94805, Villejuif, France
| | - Mikael Johansson
- Department of Radiation Sciences, Umeå University, Umeå SE-901 87, Sweden
| | - J.Ramón Quirós
- Public Health Directorate Asturias, CP 33006 Oviedo, Spain
| | - Sabina Sieri
- Epidemiology and Prevention Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, 20133 Milano, Italy
| | - Ruth C. Travis
- Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford OX3 7LF, UK
| | - Elisabete Weiderpass
- Department of Community Medicine, Faculty of Health Sciences, University of Tromsø, The Arctic University of Norway, 9037 Tromsø, Norway
- Department of Research, Cancer Registry of Norway, 0379 Oslo, Norway
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm SE-171 77, Sweden
- Genetic Epidemiology Group, Folkhälsan Research Center, Helsinki FI-00014, Finland
| | | | | | - Lynne Wilkens
- University of Hawaii Cancer Center, Honolulu, HI 96813, USA
| | - Gary E. Goodman
- Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Chu Chen
- Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Jennifer A. Doherty
- Department of Community and Family Medicine, Center for Genomic Medicine, Geisel School of Medicine, Dartmouth College, Lebanon, NH 03766, USA
| | - David C. Christiani
- Departments of Environmental Health and Epidemiology, Harvard School of Public Health, Boston, MA 02115, USA
- Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Yongyue Wei
- Departments of Environmental Health and Epidemiology, Harvard School of Public Health, Boston, MA 02115, USA
| | - Li Su
- Departments of Environmental Health and Epidemiology, Harvard School of Public Health, Boston, MA 02115, USA
| | - Shelley Tworoger
- Departments of Environmental Health and Epidemiology, Harvard School of Public Health, Boston, MA 02115, USA
- Channing Division of Network Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Xuehong Zhang
- Channing Division of Network Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Peter Kraft
- Departments of Biostatistics and Epidemiology, Harvard School of Public Health, Boston, MA 02115, USA
| | - David Zaridze
- Russian Cancer Research Center, Moscow 115478, Russia
| | - John K. Field
- Roy Castle Lung Cancer Research Programme, University of Liverpool Cancer Research Centre Institute of Translational Medicine, University of Liverpool, Liverpool L69 3BX, UK
| | - Michael W. Marcus
- Roy Castle Lung Cancer Research Programme, University of Liverpool Cancer Research Centre Institute of Translational Medicine, University of Liverpool, Liverpool L69 3BX, UK
| | - Michael P.A. Davies
- Roy Castle Lung Cancer Research Programme, University of Liverpool Cancer Research Centre Institute of Translational Medicine, University of Liverpool, Liverpool L69 3BX, UK
| | - Russell Hyde
- Roy Castle Lung Cancer Research Programme, University of Liverpool Cancer Research Centre Institute of Translational Medicine, University of Liverpool, Liverpool L69 3BX, UK
| | - Neil E. Caporaso
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD 20892, USA
| | - Maria Teresa Landi
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD 20892, USA
| | - Gianluca Severi
- Human Genetics Foundation (HuGeF), 10126Torino, Italy
- INSERM, Centre for Research in Epidemiology and Population Health (CESP), U1018, Lifestyle, Genes and Health: Integrative Trans-Generational Epidemiology, 94805 Villejuif, France
- Université Paris Sud, UMRS 1018 94805, Villejuif, France
- Institut Gustave RoussyF-94805, Villejuif, France
- Cancer Epidemiology Centre, Cancer Council Victoria, Melbourne 3004, Australia
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Melbourne 3010, Australia
| | - Graham G. Giles
- Cancer Epidemiology Centre, Cancer Council Victoria, Melbourne 3004, Australia
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Melbourne 3010, Australia
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne 3004, Australia
| | - Geoffrey Liu
- Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario M5T 3M7, Canada
- Ontario Cancer Institute, Princess Margaret Cancer Center, Toronto, Ontario M5G 0A3, Canada
| | - John R. McLaughlin
- Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, Ontario M5T 3L9, Canada
- Public Health Ontario, Toronto, Ontario M5G 1V2, Canada, and
| | - Yafang Li
- Department of Community and Family Medicine, Center for Genomic Medicine, Geisel School of Medicine, Dartmouth College, Lebanon, NH 03766, USA
| | - Xiangjun Xiao
- Department of Community and Family Medicine, Center for Genomic Medicine, Geisel School of Medicine, Dartmouth College, Lebanon, NH 03766, USA
| | - Gord Fehringer
- Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, Ontario M5T 3L9, Canada
| | - Xuchen Zong
- Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, Ontario M5T 3L9, Canada
| | - Robert E. Denroche
- Genome Technologies, Ontario Institute for Cancer Research, Toronto, Ontario M5G 0A3, Canada
| | - Philip C. Zuzarte
- Genome Technologies, Ontario Institute for Cancer Research, Toronto, Ontario M5G 0A3, Canada
| | - John D. McPherson
- Genome Technologies, Ontario Institute for Cancer Research, Toronto, Ontario M5G 0A3, Canada
| | - Paul Brennan
- International Agency for Research on Cancer, Lyon, CEDEX 08, 69372, France
| | - Rayjean J. Hung
- Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, Ontario M5T 3L9, Canada
- Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario M5T 3M7, Canada
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5
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Liloglou T, Bediaga NG, Brown BR, Field JK, Davies MP. Epigenetic biomarkers in lung cancer. Cancer Lett 2014; 342:200-12. [DOI: 10.1016/j.canlet.2012.04.018] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 04/18/2012] [Accepted: 04/22/2012] [Indexed: 12/31/2022]
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Davies MP, Barraclough DL, Stewart C, Joyce KA, Eccles RM, Barraclough R, Rudland PS, Sibson DR. Expression and splicing of the unfolded protein response gene XBP-1 are significantly associated with clinical outcome of endocrine-treated breast cancer. Int J Cancer 2008; 123:85-8. [DOI: 10.1002/ijc.23479] [Citation(s) in RCA: 131] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Walker C, Joyce KA, Thompson-Hehir J, Davies MP, Gibbs FE, Halliwell N, Lloyd BH, Machell Y, Roebuck MM, Salisbury J, Sibson DR, Du Plessis D, Broome J, Rossi ML. Characterisation of molecular alterations in microdissected archival gliomas. Acta Neuropathol 2001; 101:321-33. [PMID: 11355303 DOI: 10.1007/s004010000259] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [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: 11/26/2022]
Abstract
Classification of gliomas according to their molecular characteristics may be important in future histopathological diagnosis. However, gliomas frequently display heterogeneity at the histological, biological and molecular level. In this study of archival diagnostic gliomas, precision microdissection was used to enrich samples in the most malignant cells or to investigate intratumoural histological heterogeneity. Analysis of tumour samples microdissected from the most aggressive regions, representative of the histopathological diagnosis, revealed PTEN mutations in 4/14 anaplastic astrocytomas, 4/13 glioblastomas and 1 gliosarcoma, but not in 19 low-grade gliomas. Using a novel PCR procedure and direct sequence analysis of the entire coding sequence, TP53 mutations were detected in 1/3 pilocytic astrocytomas, 3/13 astrocytomas, 4/14 anaplastic astrocytomas, 5/13 glioblastomas and 1 gliosarcoma. All but one of the tumours with TP53 mutation showed p53 immunopositivity, but 5 low-grade and 10 high-grade gliomas had p53 protein nuclear accumulation in the absence of detectable mutation. p53 status was unrelated to p21 expression. Neither PTEN nor TP53 mutations influenced the proliferative index or microvessel density of high-grade astrocytomas. Unusual findings include: TP53 mutation in a juvenile pilocytic astrocytoma; TP53 and PTEN mutations in a de novo glioblastoma, a gliosarcoma with identical mutations in gliomatous and sarcomatous components, and an infratentorial anaplastic astrocytoma with an earlier supratentorial grade II astrocytoma bearing the same TP53 mutation but not the PTEN mutation or loss of heterozygosity (LOH) of 10q23. Similarly, the transition to high-grade histology was associated with acquisition of PTEN mutations and 10q23.3 LOH in two de novo high-grade tumours with regions of low-grade histology.
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Affiliation(s)
- C Walker
- Clatterbridge Cancer Research Trust, J.K. Douglas Laboratories, Clatterbridge Hospital, Bebington, Wirral CH63 4JY, UK.
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8
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Shoker BS, Jarvis C, Davies MP, Iqbal M, Sibson DR, Sloane JP. Immunodetectable cyclin D(1)is associated with oestrogen receptor but not Ki67 in normal, cancerous and precancerous breast lesions. Br J Cancer 2001; 84:1064-9. [PMID: 11308255 PMCID: PMC2363868 DOI: 10.1054/bjoc.2001.1705] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Cyclin D1 is associated with cell cycle regulation and has more recently been shown to stimulate the transcriptional functions of the oestrogen receptor (ER). Furthermore, in normal breast there is a negative association between expression of ER and the proliferation marker Ki67 indicating that either ER positive cells are non-dividing or that the receptor is down-regulated as cells enter cycle. This important relationship breaks down in many ER-positive cancers and precancerous breast lesions where the receptor is often detected on proliferating cells. The aims of the present study were to determine the interplay between ER, Ki67 and cyclin D(1)in individual cells within the spectrum of human breast lesions ranging from normal to invasive carcinoma by using dual staining immunofluorescence. We found that in normal breast there was a strong positive association between ER and cyclin D(1)expression. In contrast there was a strong negative association between cyclin D(1)and Ki67 expression. Similar findings were seen for the other precancerous and cancerous breast lesions. Thus immunodetectable cyclin D(1)within individual cells does not appear to be associated with cell cycle progression in the benign or malignant breast but instead may have important interactions with ER.
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Affiliation(s)
- B S Shoker
- Dept. of Pathology, Royal Liverpool University Hospital, Duncan Building, Prescot Street, Liverpool, L69 3GA
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9
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Iqbal M, Davies MP, Shoker BS, Jarvis C, Sibson DR, Sloane JP. Subgroups of non-atypical hyperplasia of breast defined by proliferation of oestrogen receptor-positive cells. J Pathol 2001; 193:333-8. [PMID: 11241412 DOI: 10.1002/1096-9896(2000)9999:9999<::aid-path801>3.0.co;2-#] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
In normal breast, there is a negative association between expression of oestrogen receptor (ER) and the proliferation marker Ki67, indicating that ER-positive (ER+) cells do not divide, or that the receptor is down-regulated when they do so. However, dual staining has been found in carcinomas and precancerous lesions, indicating that abnormal regulation of ER could be important in breast tumourigenesis. ER expression in relationship to cell proliferation was studied in 241 foci of hyperplasia of usual type (HUT), a lesion associated with a 1.5 to 2-fold increase in risk of developing breast cancer. Dual label immunofluorescence was employed, using the antibodies 1D5 and Ki67. Two hundred and thirteen foci of HUT contained ER+ cells, which were distributed singly or contiguously and increased with age. Most foci resembled normal breast, but 51 contained dual labelled cells, which did not increase with age. Some of these foci exhibited few, scattered ER+ cells with greater proliferation rates than the ER-negative (ER-) cells, whereas others contained many, contiguous ER+ cells, whose rate of proliferation was less than that of the ER- cells. The latter picture is similar to that which has previously been reported in atypical ductal hyperplasia and ductal carcinoma in situ. The first type of HUT may evolve into the second. The proportion of Ki67+ cells that was ER+ was similar in both types, suggesting a homeostatic mechanism that slows the proliferation of ER+ cells as they become confluent. Overriding this inhibition may be crucial in further progression. Non-atypical hyperplasia is thus heterogeneous in ER expression and proliferation and a significant proportion exhibit abnormal regulation of ER. These findings could have implications for pathological diagnosis, risk assessment, and prophylactic hormonal therapy.
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Affiliation(s)
- M Iqbal
- Clatterbridge Cancer Research Trust, J. K. Douglas Laboratories, Clatterbridge Hospital, Bebington, CH63 4JY, UK
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Shoker BS, Jarvis C, Clarke RB, Anderson E, Munro C, Davies MP, Sibson DR, Sloane JP. Abnormal regulation of the oestrogen receptor in benign breast lesions. J Clin Pathol 2000; 53:778-83. [PMID: 11064673 PMCID: PMC1731078 DOI: 10.1136/jcp.53.10.778] [Citation(s) in RCA: 49] [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: 11/04/2022]
Abstract
BACKGROUND In normal breast tissue the oestrogen receptor (ER) and the proliferation associated antigen Ki67 are negatively associated, indicating that ER+ cells are non-dividing, or that the receptor is downregulated as cells enter cycle. This relation is completely or partially lost in many ER+ breast cancers and in in situ proliferations associated with an increased cancer risk, where coexpression of the two markers is often found. AIMS To determine whether similar changes can be identified in other risk associated breast lesions. PATIENTS/METHODS Paraffin wax blocks from 12 cases of lactational change, 21 apocrine metaplasias, 22 duct ectasias, 20 sclerosing adenosis, 20 fibroadenomas, 19 phyllodes tumours, 20 radial scars, 21 papillomas (15 solitary and six multiple), 15 gynaecomastias, and nine postmortem male breast tissues were retrieved. Immunohistochemistry was used to determine the expression of ER and dual labelling immunofluorescence was used to detect cells expressing both ER and Ki67. RESULTS Increased numbers of ER+ cells were seen in sclerosing adenosis, radial scars, papillomas, fibroadenomas, and phyllodes tumours but not in apocrine cysts (where no ER+ cells were detected) or duct ectasia (where normal numbers were found). As in the normal breast, the proportion of ER+ cells increased with age in all lesions with the exception of fibroadenomas. Coexpression of ER and Ki67 was found in an increased proportion of cells of all risk associated lesions studied. ER+ cells were less likely to be dividing than ER- cells in all cases, although this was significant only for sclerosing adenosis. The data on sclerosing adenosis, radial scars, papillomas, and fibroadenomas are comparable with those reported previously in hyperplasia of usual type, whereas those in duct ectasia are similar to those of the normal breast. The findings in all lesions, however, differed from those in ductal carcinoma in situ, where proportions of ER+ and ER+/Ki67+ cells are higher and the relation between ER+ cell numbers and age is lost. Thus, the nature and degree of dysregulation of ER in benign breast lesions is broadly in accordance with the degree of risk of developing breast cancer with which they are associated. In gynaecomastia, the proportions of ER+ and ER+/Ki67+ cells were comparable with those seen in benign female breast lesions, but changes with age were not observed. However, the changes in gynaecomastia were similar to those seen in normal male breast. CONCLUSION These findings are in keeping with the contention that the dissociation of ER and Ki67 expression is a very early change in the pathway to many breast cancers. However, this change might only have preneoplastic importance in the hormonal milieu of the female breast.
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Affiliation(s)
- B S Shoker
- Department of Pathology, University of Liverpool, UK.
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11
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Thompson-Hehir J, Davies MP, Green JA, Halliwell N, Joyce KA, Salisbury J, Sibson DR, Vergote I, Walker C. Novel polymerase chain reaction approach for full-coding p53 mutation detection in microdissected archival tumors. Diagn Mol Pathol 2000; 9:110-9. [PMID: 10850547 DOI: 10.1097/00019606-200006000-00007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Evidence suggests that up to 25% of p53 mutations are outside of exons 5-8 and that insertions, deletions, and polymorphic sites in the p53 gene may play a significant role in the process of carcinogenesis. A novel polymerase chain reaction (PCR) approach for the analysis of the entire p53 coding and splice site regions from microdissected, formalin-fixed, paraffin-embedded tumor tissues has been developed which allows multiple genetic analyses to be performed from one primary amplification reaction. The method was initially evaluated using well-characterized cell lines. In addition to confirming the published p53 mutations for HT29, Molt 4, A431, and HN5, a 16 base pair (bp) duplication within intron 3 was detected in both the A431 and HT29 cell lines. Analysis of archival samples of ovarian cancer identified the same 16-bp duplication and coding region variations. In all samples, using GenBank submission U94788 as a reference, a C-insertion was detected at nucleotide positions 11818 and 11874 within intron 2. At nucleotide position 14168, within intron 7, a T-to-G base change was found. This novel PCR approach has the potential to reduce the amount of clinical material required by up to 95%, thus facilitating retrospective studies on archival tumor collections. Furthermore, a wider analysis of the p53 gene, including splice sites and intronic regions, may yield additional information regarding cancer predisposition, response to therapy, and progression.
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Affiliation(s)
- J Thompson-Hehir
- Clatterbridge Cancer Research Trust, J. K. Douglas Cancer Research Laboratories, Clatterbridge Hospital, Bebington, Cheshire, United Kingdom.
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12
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Davies MP, Gibbs FE, Halliwell N, Joyce KA, Roebuck MM, Rossi ML, Salisbury J, Sibson DR, Tacconi L, Walker C. Mutation in the PTEN/MMAC1 gene in archival low grade and high grade gliomas. Br J Cancer 1999; 79:1542-8. [PMID: 10188904 PMCID: PMC2362705 DOI: 10.1038/sj.bjc.6690246] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The PTEN gene, located on 10q23.3, has recently been described as a candidate tumour suppressor gene that may be important in the development of advanced cancers, including gliomas. We have investigated mutation in the PTEN gene by direct sequence analysis of PCR products amplified from samples microdissected from 19 low grade (WHO Grade I and II) and 27 high grade (WHO grade III and IV) archival, formalin-fixed, paraffin-embedded gliomas. Eleven genetic variants in ten tumours have been identified. Eight of these are DNA sequence changes that could affect the encoded protein and were present in 0/2 pilocytic astrocytomas, 0/2 oligoastrocytomas, 0/1 oligodendroglioma, 0/14 astrocytomas, 3/13 (23%) anaplastic astrocytomas and 5/14 (36%) glioblastomas. PTEN mutations were found exclusively in high grade gliomas; this finding was statistically significant. Only two of the PTEN genetic variants have been reported in other studies; two of the genetic changes are in codons in which mutations have not been found previously. The results of this study indicate that mutation in the PTEN gene is present only in histologically more aggressive gliomas, may be associated with the transition from low histological grade to anaplasia, but is absent from the majority of high grade gliomas.
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Affiliation(s)
- M P Davies
- JK Douglas Cancer Research Laboratory, Clatterbridge Hospital, Bebington, Merseyside, UK
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13
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Barraclough R, Chen HJ, Davies BR, Davies MP, Ke Y, Lloyd BH, Oates A, Rudland PS. Use of DNA transfer in the induction of metastasis in experimental mammary systems. Biochem Soc Symp 1998; 63:273-94. [PMID: 9513730] [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] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The metastatic spread of cancer is a little understood process, in part because it is difficult to model the entire process using experimental approaches in vitro. The ability to transfer DNA into non-metastatic mammary cells and to observe the induction of metastasis in vivo provides a means for identifying DNA sequences that are associated with the development of metastatic capability. Using these techniques, a metastasis-associated cytoskeletal calcium binding protein, S100A4 (p9Ka), has been identified as an inducer of metastatic capability in benign rat mammary epithelial cells. Metastasis can also be induced in the rat mammary epithelial cells by fragments of DNA from metastatic, but not from benign, human breast tumour cells. These non-coding fragments of DNA act via the induction of osteopontin, an extracellular, integrin binding, calcium binding protein. Since both osteopontin and S100A4 are thought to be associated with malignancy in human breast cancer specimens, gene transfer techniques can identify genes for metastasis-inducing proteins that may play a role in breast cancer, and further suggest that cell migration/motility might be important in the metastatic process.
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Affiliation(s)
- R Barraclough
- Department of Biochemistry, University of Liverpool, U.K
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14
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Chen D, Davies MP, Rudland PS, Barraclough R. Transcriptional down-regulation of the metastasis-inducing S100A4 (p9Ka) in benign but not in malignant rat mammary epithelial cells by GC-factor. J Biol Chem 1997; 272:20283-90. [PMID: 9242709 DOI: 10.1074/jbc.272.32.20283] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [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: 02/04/2023] Open
Abstract
The S100-related calcium-binding protein S100A4 (p9Ka) is expressed at a low level in rat mammary epithelial cells from normal mammary gland and benign mammary tumors. In transgenic mice, expressed rat S100A4 transgenes co-operate with the activated c-erbB-2 oncogene, neu, to form metastatic mammary tumors. Elevated levels of S100A4 (p9Ka) in cultured benign rat or mouse mammary epithelial cells are associated with the induction of metastatic capability. A cis-acting sequence related to the consensus recognition sequence of GC-factor, 1,300 base pairs upstream of the start site of transcription of the rat S100A4 gene, acts as a cis-acting inhibitor of transcription of the S100A4 (p9Ka) gene in a low S100A4 (p9Ka)-expressing benign rat mammary epithelial cell line, but not in highly expressing rat mammary epithelial cell lines. There is an inverse relationship between the level of S100A4 (p9Ka) mRNA and the level of GC-factor mRNA in a range of rat mammary cell lines. The results suggest a novel mechanism for regulating the expression of the mRNA encoding an S100 protein.
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Affiliation(s)
- D Chen
- Cancer and Polio Research Fund Laboratories, School of Biological Sciences, University of Liverpool, P. O. Box 147, Liverpool L69 7ZB, United Kingdom
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15
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Ke Y, Jing C, Barraclough R, Smith P, Davies MP, Foster CS. Elevated expression of calcium-binding protein p9Ka is associated with increasing malignant characteristics of rat prostate carcinoma cells. Int J Cancer 1997; 71:832-7. [PMID: 9180153 DOI: 10.1002/(sici)1097-0215(19970529)71:5<832::aid-ijc22>3.0.co;2-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [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: 02/04/2023]
Abstract
Northern and Western blotting techniques were used to study expression of the mRNA and corresponding protein product of the S100-related calcium-binding molecule p9Ka in 6 different metastatic cell lines of the Dunning R3327 rat prostate cancer model. In cells with the lowest metastatic capability (G cells), p9Ka mRNA was barely detectable. In 2 weakly metastatic cell lines (AT-1 and AT-2), p9Ka transcript amounts were, respectively, 6.29 +/- 0.74 and 5.55 +/- 1.11 times that detected in the G cells. In 3 highly metastatic cell lines (AT-3, MAT-LyLu and MAT-Lu), the amounts of p9Ka mRNA were, respectively, 12.85 +/- 2.82, 13.06 +/- 1.69 and 11.62 +/- 1.81 times that expressed in the G cells. Western blot analyses detected no p9Ka protein in the G cells. The amounts of p9Ka protein expressed by tumour cells of intermediate metastatic capability (AT-1 and AT-2) were 3.4 +/- 1.3 microg and 3.3 +/- 1.4 microg, respectively, per 1 x 10(6) cells. The amounts of p9Ka protein expressed by the tumour cells of highest metastatic capability (AT-3, MAT-LyLu and MAT-Lu) were 8.3 +/- 1.1 microg, 8.7 +/- 1.6 microg and 9.6 +/- 1.7 microg, respectively, per 1 x 10(6) cells. Our data reveal a direct association between the elevated expression of mRNA and the p9Ka protein amounts and the increased metastatic capability of individual prostatic cancer cell lines. We suggest that calcium-binding protein p9Ka may play an important role in the metastatic behaviour of rat prostate cancer.
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Affiliation(s)
- Y Ke
- Department of Pathology, University of Liverpool, UK
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Davies MP, Rudland PS, Robertson L, Parry EW, Jolicoeur P, Barraclough R. Expression of the calcium-binding protein S100A4 (p9Ka) in MMTV-neu transgenic mice induces metastasis of mammary tumours. Oncogene 1996; 13:1631-7. [PMID: 8895508] [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: 02/02/2023]
Abstract
Increased levels of S100A4 (p9Ka) confer metastatic ability on a normally non-metastatic epithelial cell line. To find out whether S100A4 can induce metastasis in vivo, transgenic mice expressing high levels of S100A4, but which show no phenotypic effect, have been mated with MMTV-neu transgenic mice which succumb to stochastic mammary neoplasia related to expression of the MMTV-neu transgene. Resultant bitransgenic, multiparous, female progeny expressing both S100A4 and Neu have a slightly earlier incidence of palpable mammary tumours than the MMTV-neu offspring and specifically exhibit macroscopic metastatic lesions in the lungs. The S100A4 transgene is expressed in primary and secondary lesions of bitransgenic offspring and its expression is particularly associated with regions of invasion of primary lesions and metastases.
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Affiliation(s)
- M P Davies
- Department of Biochemistry, University of Liverpool, UK
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17
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Davies MP, Brook GM, Weir WR, Bannister B, Tibbs C. Liver function tests in adults with Plasmodium falciparum infection. Eur J Gastroenterol Hepatol 1996; 8:873-5. [PMID: 8889453] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
This study examines the levels of serum bilirubin, aspartate transaminase and alkaline phosphatase in adults with Plasmodium falciparum malaria. One hundred and six sets of liver function tests were obtained, and 63 (59.4%) patients had one of the above indices elevated outside the local reference range. Serum bilirubin and aspartate transaminase were relatively higher than alkaline phosphatase. Neither duration of illness nor severity of infection showed any significant correlation with any of the indices measured.
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Affiliation(s)
- M P Davies
- Coppett's Wood Hospital, Royal Free Hospital, Department of Infectious and Tropical Diseases, London, UK
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18
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Kass RS, Davies MP. The roles of ion channels in an inherited heart disease: molecular genetics of the long QT syndrome. Cardiovasc Res 1996; 32:443-54. [PMID: 8881507] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Affiliation(s)
- R S Kass
- Department of Physiology, University of Rochester Medical Center, NY 14642, USA.
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19
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Davies MP, Harris S, Rudland PS, Barraclough R. Growth & mammary abnormalities in mice containing an altered calcium-binding protein transgene. Biochem Soc Trans 1996; 24:356S. [PMID: 8878900 DOI: 10.1042/bst024356s] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- M P Davies
- Department of Biochemistry, University of Liverpool, United Kingdom
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20
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Davies MP, Freeman LC, Kass RS. Dual actions of the novel class III antiarrhythmic drug NE-10064 on delayed potassium channel currents in guinea pig ventricular and sinoatrial node cells. J Pharmacol Exp Ther 1996; 276:1149-54. [PMID: 8786546] [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: 02/02/2023] Open
Abstract
We have investigated the concentration-dependent modulation, by the novel class III antiarrhythmic compound NE-10064, of the delayed potassium channel current Iks in isolated guinea pig sinoatrial nodal (SAN) and ventricular cells. At concentrations greater than 1 micron, the drug potently inhibited Iks in each of the cell types investigated. The concentration-dependent inhibition of Iks (IC50 = 700 nM) was the same in ventricular and SAN cells. At near-threshold drug concentrations, we also observed increases of Iks activity in both SAN and ventricular cells. The NE-10064-induced enhancement of Iks was more pronounced at voltages near the Iks activation threshold (0 mV), than at more positive voltages in both cell types. Furthermore, the agonistic effects of the drug were more prominent before steady-state effects of the compound were attained, which suggests parallel agonistic and antagonistic pathways. Our results demonstrate that Iks channels in cells of the sinoatrial node region of the guinea pig heart respond to NE-10064 in the same manner as cells of the ventricle and that this compound, although a potent inhibitor of Iks activity, possesses an interesting but as yet mechanistically unidentified agonistic action at low concentrations in both cell types.
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Affiliation(s)
- M P Davies
- Department of Physiology, University of Rochester Medical Center, New York, USA
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21
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An RH, Davies MP, Doevendans PA, Kubalak SW, Bangalore R, Chien KR, Kass RS. Developmental changes in beta-adrenergic modulation of L-type Ca2+ channels in embryonic mouse heart. Circ Res 1996; 78:371-8. [PMID: 8593695 DOI: 10.1161/01.res.78.3.371] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In the adult mammalian myocardium, cellular Ca2+ entry is regulated by the sympathetic nervous system. L-type Ca2+ channel currents are markedly increased by beta-adrenergic (beta-A) agonists, which contribute to changes in pacing and contractile activity of the heart. In the developing mammalian heart, the regulation of Ca2+ entry by this enzyme cascade has not been clearly established, because changes in receptor density and coupling to downstream elements of the signaling cascade are known to occur during embryogenesis. In this study, we systematically investigated the regulation of L-type Ca2+ channel currents during development of the murine embryonic heart. We used conventional whole-cell and perforated-patch-clamp procedures to study modulation of L- type Ca2+ channel currents and to assay functional activity of distinct steps in the beta-A signaling cascade in murine embryonic myocytes at different stages of gestation. Our data indicate that the L-type Ca2+ channels in early-stage (day-11 to -13) myocytes are unresponsive to either isoproterenol or cAMP. L-type Ca2+ channels in late-stage (day-17 to -19) murine myocytes, however, exhibit responses to isoproterenol and cAMP similar to responses in adult cells, providing evidence that the beta-A cascade becomes functionally active during this period of embryonic development. We found that L-type Ca2+ channel activity in early-stage cells is increased by cell dialysis with the catalytic subunit of cAMP-dependent protein kinase (cA-PK) and that dialysis of early-stage cells with the holoenzyme of cA-PK restores functional responses to forskolin and cAMP, but not to isoproterenol. Our results provide strong evidence that a key factor in the early-stage insensitivity of L-type Ca2+ channels to cAMP is the absence, or low expression level, of the holoenzyme of cA-PK but that in addition, another element in the signaling cascade upstream from adenylate cyclase is expressed at a nonfunctional level or is uncoupled from the cascade and thus contributes to L-type Ca2+ channel insensitivity to beta-A agonists in early stages of the developing murine heart.
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Affiliation(s)
- R H An
- Department of Physiology, University of Rochester Medical Center, New York 14642-8642, USA
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22
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Abstract
The effects of six K+ channel openers were investigated on contractions of the rat ileum longitudinal muscle-myenteric plexus preparation elicited by electrical field stimulation and by K+. Levcromakalim, pinacidil, RP 49356 (N-methyl-2-(3 pyridyl)-tetrahydrothiopyran-2-carbothioamide-1-oxide) and SDZ PCO 400 ((3S,4R)-3, 4-dihydro-3-hydroxy-2, 2-dimethyl-4-[(3-oxo-1-cyclopenten-1-yl)oxy]-2H-1-benzopyran-6-car bonitrile) completely abolished contractions elicited by electrical stimulation and caused complete relaxation of contractions elicited by K+ with comparable IC50 values. Minoxidil sulphate was much less potent and diazoxide was without effect in either protocol. The relaxant effects of these agents were antagonized by glibenclamide, tetraethylammonium and yohimbine in a manner which was not surmountable. The present study indicates that the relaxant effect of these compounds in intestinal smooth muscle is mediated through glibenclamide-sensitive ATP-dependent K+ channels. These compounds did not preferentially inhibit either direct smooth muscle- or nerve-mediated responses. The present data may point to differences in the channels or their regulatory sites, in intestinal, compared with vascular, smooth muscle.
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Affiliation(s)
- M P Davies
- Postgraduate Studies in Pharmacology, School of Pharmacy, University of Bradford, West Yorkshire, UK
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23
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Abstract
We have isolated murine embryonic atrial and ventricular cells derived from timed-pregnant females at different periods and used patch-clamp procedures to investigate age- and chamber-specific expression of ionic channels in the developing fetal mouse. Our data indicate that L-type Ca2+ channels play a dominant role in excitation during early murine cardiac embryogenesis and that Na+ channel expression increases dramatically just before birth. K+ channel expression is particularly sensitive to changes during development. Neither atrial nor ventricular cells express a slowly activating component of delayed rectification (IKs) until just before birth, and inwardly rectifying channel activity, associated with determination of cellular resting potential, is not markedly apparent until late stages of embryogenesis. Instead, we find robust expression of the ATP-regulated K+ channel at early and late states of embryonic development, which may indicate a novel functional role for this channel during morphogenesis of the heart. These results have important implications for the physiology and development of the murine cardiac conduction system and will also serve as a baseline for future studies designed to investigate developmental changes of ion channel expression in the myocardium of both wild-type and genetically modified mice.
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Affiliation(s)
- M P Davies
- Department of Physiology, University of Rochester School of Medicine and Dentistry, NY 14642, USA
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24
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Abstract
Acute renal failure is an uncommon occurrence in burns patients, although the mortality of this condition remains high. We review briefly the literature on the incidence and management of acute renal failure in burns patients. We discuss the results of a questionnaire sent to all units in the UK examining this problem. Our findings suggest that acute renal failure is usually part of a complex multiorgan failure. However, an aggressive approach in the management of these patients can result in a significant improvement in prognosis, in the absence of a greater understanding of prevention of the condition. We have suggested measures that could be taken to aid the care of burns patients with renal failure.
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Affiliation(s)
- M P Davies
- Department of Plastic Surgery, Derriford Hospital, Plymouth, Devon, UK
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25
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Davies MP, Evans J. Surgery and benign facial lesions. Arch Dis Child 1993; 69:619. [PMID: 8257191 PMCID: PMC1029634 DOI: 10.1136/adc.69.5.619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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26
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Abstract
Paralytic ileus occurs commonly in patients with over 20 per cent TBSA burns in the first few days after the burn. In the absence of sepsis, it is unusual for abdominal problems to develop later. We present an example of acute abdominal pseudo-obstruction occurring 5 weeks after a burn and review the management of this condition.
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27
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Abstract
A syngeneic, immunocompetent rat mammary model has been employed to investigate the molecular basis of the metastatic phenotype. Transfection of the benign rat mammary epithelial cell line Rama 37 with the gene for p9Ka; a small, rat, calcium-binding protein or DNA from metastatic human cell lines derived from a primary breast carcinoma or a pleural effusion yields transfectants with metastatic capabilities. Transfection of DNA from a benign human mammary cell line, a plasmid containing a cDNA for the human basic fibroblast growth factor (bFGF) gene, or the oncogene EJ-ras-1, fails to yield any transfectants expressing the metastatic phenotype.
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Affiliation(s)
- B R Davies
- Biochemistry Department, University of Liverpool
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28
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Davies BR, Davies MP, Gibbs FE, Barraclough R, Rudland PS. Induction of the metastatic phenotype by transfection of a benign rat mammary epithelial cell line with the gene for p9Ka, a rat calcium-binding protein, but not with the oncogene EJ-ras-1. Oncogene 1993; 8:999-1008. [PMID: 8455951] [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: 01/30/2023]
Abstract
The rat mammary epithelial cell line, Rama 37, yields benign, non-metastasizing adenomatous tumours in syngeneic Wistar-Furth rats. Transfection of this line with a drug resistance plasmid containing both the gene for resistance to Geneticin (neo) and the gene for p9Ka (pSV2neo-p9Ka), a rat calcium-binding protein, or with a similar plasmid containing neo and the oncogene EJ-ras-1 (pSV2neo-ras) yields drug-resistant transformants that express high levels of the p9Ka or EJ-ras-1 mRNAs and proteins. These transfected cells all produce tumours when injected at subcutaneous sites with a shorter median latent period than the tumours produced by the parental untransfected Rama 37 cells in syngeneic hosts. Cells transfected with pSV2neo-p9Ka yield a higher incidence of tumours than untransfected Rama 37 cells, many of which metastasize to lungs and/or lymph nodes in syngeneic rats. However, cells transfected with pSV2-neo-ras or pSV2neo plasmid alone yield tumours that fail to metastasize. Immunofluorescent studies suggest an association of p9Ka with the cytoskeleton, as depicted by F-actin staining with the reagent phalloidin. It is suggested that the transfection of copies of the gene for the rat calcium-binding protein p9Ka can enhance the tumorigenic potential and induce the metastatic phenotype in this rat mammary model, whereas transfection of control plasmid DNA or the oncogene EJ-ras-1 fails to induce the metastatic phenotype, although EJ-ras-1 transfectants, like those containing p9Ka, possess increased growth properties in vivo.
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Affiliation(s)
- B R Davies
- Biochemistry Department, University of Liverpool, UK
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29
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Affiliation(s)
- D A Ross
- Regional Plastic Surgery Unit, Queen Mary's University Hospital, Roehampton, London
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30
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Merritt JE, McCarthy SA, Davies MP, Moores KE. Use of fluo-3 to measure cytosolic Ca2+ in platelets and neutrophils. Loading cells with the dye, calibration of traces, measurements in the presence of plasma, and buffering of cytosolic Ca2+. Biochem J 1990; 269:513-9. [PMID: 2117443 PMCID: PMC1131607 DOI: 10.1042/bj2690513] [Citation(s) in RCA: 245] [Impact Index Per Article: 7.2] [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: 12/30/2022]
Abstract
A description is given of the methodology, and problems encountered, for the use of a new fluorescent Ca2(+)-indicator dye, fluo-3, in neutrophils and platelets. The higher Kd and longer excitation wavelength of fluo-3 can have significant advantages over fura-2. Although neutrophils and platelets are used as examples, these observations will be applicable to other cell types. The Kd of fluo-3 for binding Ca2+ at 37 degrees C was measured and found to be 864 nM; the previously published value was 400 nM at 22 degrees C. The Kd of fluo-3, like that of fura-2, is therefore very temperature-dependent. Protocols for loading cells, and preventing leakage of fluo-3, are described; probenecid, known to inhibit fura-2 leakage from cells, was found to be essential to get good fluo-3 signals from platelets. Calibration of fluo-3 fluorescence signals to [Ca2+] and methods for obtaining maximum and minimum fluorescence signals are described; these methods differ from those used with fura-2. Agonist-stimulated responses of fluo-3-loaded neutrophils and platelets are shown, and the calculated cytosolic [Ca2+] is comparable with that previously obtained with fura-2. Responses of cells in the presence of plasma are also shown; such measurements, unobtainable with quin2, fura-2 or indo-1, are possible with fluo-3, owing to its longer excitation wavelengths. Co-loading of cells with bis-(o-aminophenoxy)ethane-NNN'N'-tetra-acetic acid and fluo-3 is included as an example of how cytosolic [Ca2+] can be buffered and manipulated. Many of these observations will be of value when using fluo-3 (or other Ca2(+)-indicator dyes) in most cell types.
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Affiliation(s)
- J E Merritt
- Smith, Kline & French Research Ltd., Welwyn, Herts, U.K
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31
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Abstract
Stimulated adherence of human neutrophils to plastic and changes in cytosolic free Ca2+ concn. [( Ca2+]i) were measured in the same cell preparations. [Ca2+]i-activation curves were constructed to compare the relation between [Ca2+]i and adhesion in response to ionomycin and formylmethionyl-leucyl-phenylalanine (FMLP). This showed that FMLP-stimulated adhesion required less increase in [Ca2+]i than did ionomycin's effect, a result suggesting that an additional stimulatory component might be involved in the response to FMLP. Protein kinase C activation was a possibility, and activation of protein kinase C with a phorbol ester (PMA) was found to stimulate adhesion with no change in [Ca2+]i. A low concentration of PMA was found to synergize with ionomycin to stimulate a greater adhesion response than with each alone, and the [Ca2+]i-activation curve for ionomycin in the presence of PMA was shifted towards that for FMLP. Thus, synergy between [Ca2+]i and protein kinase C (each of which is sufficient alone) probably explains the stimulatory effects of FMLP on adhesion of neutrophils.
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Affiliation(s)
- M P Davies
- Department of Cellular Pharmacology, Smith, Kline & French Research Ltd., Welwyn, Herts, U.K
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