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Using prior information from the medical literature in GWAS of oral cancer identifies novel susceptibility variant on Chromosome 4 - the AdAPT method

  • Mattias Johansson
  • , Angus Roberts
  • , Dan Chen
  • , Yaoyong Li
  • , Manon Delahaye-Sourdeix
  • , Niraj Aswani
  • , Mark A. Greenwood
  • , Simone Benhamou
  • , Pagona Lagiou
  • , Ivana Holcátová
  • , Lorenzo Richiardi
  • , Kristina Kjaerheim
  • , Antonio Agudo
  • , Xavier Castellsagué
  • , Tatiana V. Macfarlane
  • , Luigi Barzan
  • , Cristina Canova
  • , Nalin S. Thakker
  • , David I. Conway
  • , Ariana Znaor
  • Claire M. Healy, Wolfgang Ahrens, David Zaridze, Neonilia Szeszenia-Dabrowska, Jolanta Lissowska, Eleonóra Fabiánová, Ioan Nicolae Mates, Vladimir Bencko, Lenka Foretova, Vladimir Janout, Maria Paula Curado, Sergio Koifman, Ana Menezes, Victor Wünsch-Filho, Jose Eluf-Neto, Paolo Boffetta, Silvia Franceschi, Rolando Herrero, Leticia Fernandez Garrote, Renato Talamini, Stefania Boccia, Pilar Galan, Lars Vatten, Peter Thomson, Diana Zelenika, Mark Lathrop, Graham Byrnes, Hamish Cunningham, Paul Brennan, Jon Wakefield, James D. Mckay
  • International Agency for Research on Cancer
  • University of Sheffield
  • University of Manchester
  • Institut national de la santé et de la recherche médicale
  • University of Paris Sud
  • National and Kapodistrian University of Athens
  • Charles University
  • University of Turin
  • Cancer Registry of Norway Institute of Population-Based Cancer Research
  • Bellvitge Biomedical Research Institute
  • CIBER Epidemiología y Salud Pública (CIBERESP)
  • University of Aberdeen
  • General Hospital of Pordenone
  • University of Padua
  • Imperial College London
  • University of Glasgow
  • Croatian National Institute of Public Health
  • Trinity College Dublin
  • Leibniz Institute for Prevention Research and Epidemiology
  • University of Bremen
  • Blokhin Cancer Research Center
  • Nofer Institute of Occupational Medicine
  • Maria Sklodowska-Curie Institute of Oncology
  • Regional Authority of Public Health
  • Carol Davila University of Medicine and Pharmacy
  • Masaryk Memorial Cancer Institute
  • Palacký University Olomouc
  • University of Strathclyde
  • Hospital Araujo Jorge da ACCG
  • Fundação Oswaldo Cruz
  • Universidade Federal de Pelotas
  • Universidade de São Paulo
  • Instituto de Investigación Epidemiológica
  • National School of Public Health
  • IRCCS Centro di Riferimento Oncologico - Aviano PN
  • Catholic University of the Sacred Heart
  • IRCCS San Raffaele Pisana - Roma
  • CRNH IdF
  • Norwegian University of Science and Technology
  • Newcastle University
  • Institut Génomique, Commissariat À l'Énergie Atomique
  • Fondation Jean Dausset - CEPH
  • University of Washington

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Background: Genome-wide association studies (GWAS) require large sample sizes to obtain adequate statistical power, but it may be possible to increase the power by incorporating complementary data. In this study we investigated the feasibility of automatically retrieving information from the medical literature and leveraging this information in GWAS. Methods: We developed a method that searches through PubMed abstracts for pre-assigned keywords and key concepts, and uses this information to assign prior probabilities of association for each single nucleotide polymorphism (SNP) with the phenotype of interest - the Adjusting Association Priors with Text (AdAPT) method. Association results from a GWAS can subsequently be ranked in the context of these priors using the Bayes False Discovery Probability (BFDP) framework. We initially tested AdAPT by comparing rankings of known susceptibility alleles in a previous lung cancer GWAS, and subsequently applied it in a two-phase GWAS of oral cancer. Results: Known lung cancer susceptibility SNPs were consistently ranked higher by AdAPT BFDPs than by p-values. In the oral cancer GWAS, we sought to replicate the top five SNPs as ranked by AdAPT BFDPs, of which rs991316, located in the ADH gene region of 4q23, displayed a statistically significant association with oral cancer risk in the replication phase (per-rare-allele log additive p-value [ptrend] = 2.5×10-3). The combined OR for having one additional rare allele was 0.83 (95% CI: 0.76-0.90), and this association was independent of previously identified susceptibility SNPs that are associated with overall UADT cancer in this gene region. We also investigated if rs991316 was associated with other cancers of the upper aerodigestive tract (UADT), but no additional association signal was found. Conclusion: This study highlights the potential utility of systematically incorporating prior knowledge from the medical literature in genome-wide analyses using the AdAPT methodology. AdAPT is available online (url: http://services.gate.ac.uk/lld/gwas/service/config).

Original languageEnglish
Article numbere36888
JournalPLoS ONE
Volume7
Issue number5
DOIs
StatePublished - May 25 2012

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