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Schröder J, Schüller V, May A, Gerges C, Anders M, Becker J, Hess T, Kreuser N, Thieme R, Ludwig KU, Noder T, Venerito M, Veits L, Schmidt T, Fuchs C, Izbicki JR, Hölscher AH, Dakkak D, Jansen-Winkeln B, Moulla Y, Lyros O, Niebisch S, Mehdorn M, Lang H, Lorenz D, Schumacher B, Mayershofer R, Vashist Y, Ott K, Vieth M, Weismüller J, Mangold E, Nöthen MM, Moebus S, Knapp M, Neuhaus H, Rösch T, Ell C, Gockel I, Schumacher J, Böhmer AC. Identification of loci of functional relevance to Barrett's esophagus and esophageal adenocarcinoma: Cross-referencing of expression quantitative trait loci data from disease-relevant tissues with genetic association data. PLoS One 2019; 14:e0227072. [PMID: 31891614 PMCID: PMC6938334 DOI: 10.1371/journal.pone.0227072] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 12/10/2019] [Indexed: 01/29/2023] Open
Abstract
Esophageal adenocarcinoma (EA) and its precancerous condition Barrett's esophagus (BE) are multifactorial diseases with rising prevalence rates in Western populations. A recent meta-analysis of genome-wide association studies (GWAS) data identified 14 BE/EA risk loci located in non-coding genomic regions. Knowledge about the impact of non-coding variation on disease pathology is incomplete and needs further investigation. The aim of the present study was (i) to identify candidate genes of functional relevance to BE/EA at known risk loci and (ii) to find novel risk loci among the suggestively associated variants through the integration of expression quantitative trait loci (eQTL) and genetic association data. eQTL data from two BE/EA-relevant tissues (esophageal mucosa and gastroesophageal junction) generated within the context of the GTEx project were cross-referenced with the GWAS meta-analysis data. Variants representing an eQTL in at least one of the two tissues were categorized into genome-wide significant loci (P < 5×10-8) and novel candidate loci (5×10-8 ≤ P ≤ 5×10-5). To follow up these novel candidate loci, a genetic association study was performed in a replication cohort comprising 1,993 cases and 967 controls followed by a combined analysis with the GWAS meta-analysis data. The cross-referencing of eQTL and genetic data yielded 2,180 variants that represented 25 loci. Among the previously reported genome-wide significant loci, 22 eQTLs were identified in esophageal mucosa and/or gastroesophageal junction tissue. The regulated genes, most of which have not been linked to BE/EA etiology so far, included C2orf43/LDAH, ZFP57, and SLC9A3. Among the novel candidate loci, replication was achieved for two variants (rs7754014, Pcombined = 3.16×10-7 and rs1540, Pcombined = 4.16×10-6) which represent eQTLs for CFDP1 and SLC22A3, respectively. In summary, the present approach identified candidate genes whose expression was regulated by risk variants in disease-relevant tissues. These findings may facilitate the elucidation of BE/EA pathophysiology.
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Affiliation(s)
- Julia Schröder
- Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
| | - Vitalia Schüller
- Institute for Medical Biometry, Informatics, and Epidemiology, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
| | - Andrea May
- Department of Medicine II, Sana Klinikum, Offenbach, Germany
| | - Christian Gerges
- Department of Internal Medicine II, Evangelisches Krankenhaus, Düsseldorf, Germany
| | - Mario Anders
- Department of Interdisciplinary Endoscopy, University Hospital Hamburg-Eppendorf, Hamburg, Germany
- Department of Gastroenterology and Interdisciplinary Endoscopy, Vivantes Wenckebach-Klinikum, Berlin, Germany
| | - Jessica Becker
- Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
| | - Timo Hess
- Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
- Center for Human Genetics, University Hospital Marburg, Marburg, Germany
| | - Nicole Kreuser
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - René Thieme
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Kerstin U. Ludwig
- Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
| | - Tania Noder
- Department of Interdisciplinary Endoscopy, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Marino Venerito
- Department of Gastroenterology, Hepatology and Infectious Diseases, Otto-von-Guericke University Hospital, Magdeburg, Germany
| | - Lothar Veits
- Institute of Pathology, Klinikum Bayreuth, Bayreuth, Germany
| | - Thomas Schmidt
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Claudia Fuchs
- Department of General, Visceral, and Cancer Surgery, University of Cologne, Cologne, Germany
| | - Jakob R. Izbicki
- Department of General, Visceral, and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, University of Hamburg, Hamburg, Germany
| | - Arnulf H. Hölscher
- Department of General, Visceral, and Cancer Surgery, University of Cologne, Cologne, Germany
| | - Dani Dakkak
- Department of Internal Medicine and Gastroenterology, Elisabeth Hospital, Essen, Germany
| | - Boris Jansen-Winkeln
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Yusef Moulla
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Orestis Lyros
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Stefan Niebisch
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Matthias Mehdorn
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Hauke Lang
- Department of General, Visceral, and Transplant Surgery, University Medical Center, University of Mainz, Mainz, Germany
| | - Dietmar Lorenz
- Department of General, Visceral, and Thoracic Surgery, Klinikum Darmstadt, Darmstadt, Germany
| | - Brigitte Schumacher
- Department of Internal Medicine and Gastroenterology, Elisabeth Hospital, Essen, Germany
| | | | - Yogesh Vashist
- Department of General, Visceral, and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, University of Hamburg, Hamburg, Germany
- Kantonsspital Aarau, Aarau, Switzerland
| | - Katja Ott
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
- Department of General, Visceral, and Thorax Surgery, RoMed Klinikum Rosenheim, Rosenheim, Germany
| | - Michael Vieth
- Institute of Pathology, Klinikum Bayreuth, Bayreuth, Germany
| | | | - Elisabeth Mangold
- Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
| | - Markus M. Nöthen
- Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
| | - Susanne Moebus
- Centre of Urban Epidemiology, Institute of Medical Informatics, Biometry, and Epidemiology, University of Essen, Essen, Germany
| | - Michael Knapp
- Institute for Medical Biometry, Informatics, and Epidemiology, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
| | - Horst Neuhaus
- Department of Internal Medicine II, Evangelisches Krankenhaus, Düsseldorf, Germany
| | - Thomas Rösch
- Department of Interdisciplinary Endoscopy, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Christian Ell
- Department of Medicine II, Sana Klinikum, Offenbach, Germany
| | - Ines Gockel
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
| | | | - Anne C. Böhmer
- Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany
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