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Naderi E, Aguado-Barrera ME, Schack LMH, Dorling L, Rattay T, Fachal L, Summersgill H, Martínez-Calvo L, Welsh C, Dudding T, Odding Y, Varela-Pazos A, Jena R, Thomson DJ, Steenbakkers RJHM, Dennis J, Lobato-Busto R, Alsner J, Ness A, Nutting C, Gómez-Caamaño A, Eriksen JG, Thomas SJ, Bates AM, Webb AJ, Choudhury A, Rosenstein BS, Taboada-Valladares B, Herskind C, Azria D, Dearnaley DP, de Ruysscher D, Sperk E, Hall E, Stobart H, Chang-Claude J, De Ruyck K, Veldeman L, Altabas M, De Santis MC, Farcy-Jacquet MP, Veldwijk MR, Sydes MR, Parliament M, Usmani N, Burnet NG, Seibold P, Symonds RP, Elliott RM, Bultijnck R, Gutiérrez-Enríquez S, Mollà M, Gulliford SL, Green S, Rancati T, Reyes V, Carballo A, Peleteiro P, Sosa-Fajardo P, Parker C, Fonteyne V, Johnson K, Lambrecht M, Vanneste B, Valdagni R, Giraldo A, Ramos M, Diergaarde B, Liu G, Leal SM, Chua MLK, Pring M, Overgaard J, Cascallar-Caneda LM, Duprez F, Talbot CJ, Barnett GC, Dunning AM, Vega A, Andreassen CN, Langendijk JA, West CML, Alizadeh BZ, Kerns SL. Large-scale meta-genome-wide association study reveals common genetic factors linked to radiation-induced acute toxicities across cancer types. JNCI Cancer Spectr 2023; 7:pkad088. [PMID: 37862240 PMCID: PMC10653584 DOI: 10.1093/jncics/pkad088] [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: 06/07/2023] [Revised: 09/18/2023] [Accepted: 10/18/2023] [Indexed: 10/22/2023] Open
Abstract
BACKGROUND This study was designed to identify common genetic susceptibility and shared genetic variants associated with acute radiation-induced toxicity across 4 cancer types (prostate, head and neck, breast, and lung). METHODS A genome-wide association study meta-analysis was performed using 19 cohorts totaling 12 042 patients. Acute standardized total average toxicity (STATacute) was modelled using a generalized linear regression model for additive effect of genetic variants, adjusted for demographic and clinical covariates (rSTATacute). Linkage disequilibrium score regression estimated shared single-nucleotide variation (SNV-formerly SNP)-based heritability of rSTATacute in all patients and for each cancer type. RESULTS Shared SNV-based heritability of STATacute among all cancer types was estimated at 10% (SE = 0.02) and was higher for prostate (17%, SE = 0.07), head and neck (27%, SE = 0.09), and breast (16%, SE = 0.09) cancers. We identified 130 suggestive associated SNVs with rSTATacute (5.0 × 10‒8 < P < 1.0 × 10‒5) across 25 genomic regions. rs142667902 showed the strongest association (effect allele A; effect size ‒0.17; P = 1.7 × 10‒7), which is located near DPPA4, encoding a protein involved in pluripotency in stem cells, which are essential for repair of radiation-induced tissue injury. Gene-set enrichment analysis identified 'RNA splicing via endonucleolytic cleavage and ligation' (P = 5.1 × 10‒6, P = .079 corrected) as the top gene set associated with rSTATacute among all patients. In silico gene expression analysis showed that the genes associated with rSTATacute were statistically significantly up-regulated in skin (not sun exposed P = .004 corrected; sun exposed P = .026 corrected). CONCLUSIONS There is shared SNV-based heritability for acute radiation-induced toxicity across and within individual cancer sites. Future meta-genome-wide association studies among large radiation therapy patient cohorts are worthwhile to identify the common causal variants for acute radiotoxicity across cancer types.
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Affiliation(s)
- Elnaz Naderi
- Department of Epidemiology, University Medical Center Groningen, Groningen, The Netherlands
- Department of Radiation Oncology, University Medical Center Groningen, Groningen, The Netherlands
- Center for Statistical Genetics, Gertrude H. Sergievsky Center, and the Department of Neurology, Columbia University Medical Center, New York, NY, USA
| | - Miguel E Aguado-Barrera
- Fundación Pública Galega Medicina Xenómica, Santiago de Compostela, Spain
- Instituto de Investigación Sanitaria de Santiago de Compostela, Santiago de Compostela, Spain
| | - Line M H Schack
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
- Department of Oncology, Gødstrup Hospital, Herning, Denmark
- NIDO | Centre for Research and Education, Gødstrup Hospital, Herning, Denmark
| | - Leila Dorling
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Tim Rattay
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Laura Fachal
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, UK
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, UK
| | - Holly Summersgill
- Manchester Academic Health Science Centre, The Christie NHS Foundation Trust, Manchester, UK
| | - Laura Martínez-Calvo
- Fundación Pública Galega Medicina Xenómica, Santiago de Compostela, Spain
- Instituto de Investigación Sanitaria de Santiago de Compostela, Santiago de Compostela, Spain
| | - Ceilidh Welsh
- Department of Oncology, University of Cambridge, Cambridge, UK
| | - Tom Dudding
- Bristol Dental School, University of Bristol, Bristol, UK
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - Yasmin Odding
- Bristol Cancer Institute, University Hospitals Bristol NHS Foundation Trust, Bristol, UK
| | - Ana Varela-Pazos
- Department of Radiation Oncology, Complexo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, Spain
| | - Rajesh Jena
- Department of Oncology, Addenbrooke’s Hospital, University of Cambridge, Cambridge, UK
| | - David J Thomson
- Division of Cancer Sciences, University of Manchester, Manchester, UK
- The Christie NHS Foundation Trust, Manchester, UK
| | - Roel J H M Steenbakkers
- Department of Radiation Oncology, University Medical Center Groningen, Groningen, The Netherlands
| | - Joe Dennis
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, UK
| | - Ramón Lobato-Busto
- Department of Medical Physics, Complexo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, Spain
| | - Jan Alsner
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Andy Ness
- Bristol Dental School, University of Bristol, Bristol, UK
| | - Chris Nutting
- Head and Neck Unit, The Royal Marsden Hospital, London, UK
| | - Antonio Gómez-Caamaño
- Instituto de Investigación Sanitaria de Santiago de Compostela, Santiago de Compostela, Spain
- Department of Radiation Oncology, Complexo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, Spain
| | - Jesper G Eriksen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Steve J Thomas
- Bristol Dental School, University of Bristol, Bristol, UK
| | - Amy M Bates
- Department of Oncology, University of Cambridge, Cambridge, UK
| | - Adam J Webb
- Department of Genetics and Genome Biology, University of Leicester, Leicester, UK
| | - Ananya Choudhury
- Division of Cancer Sciences, University of Manchester, Manchester Academic Health Science Centre, Christie Hospital, Manchester, UK
| | - Barry S Rosenstein
- Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Begona Taboada-Valladares
- Instituto de Investigación Sanitaria de Santiago de Compostela, Santiago de Compostela, Spain
- Department of Radiation Oncology, Complexo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, Spain
| | - Carsten Herskind
- Department of Radiation Oncology, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - David Azria
- Fédération Universitaire d’Oncologie Radiothérapie d’Occitanie Méditérranée, Département d’Oncologie Radiothérapie, ICM Montpellier, INSERM U1194 IRCM, University of Montpellier, Montpellier, France
| | - David P Dearnaley
- Division of Radiotherapy and Imaging, The Institute of Cancer Research Department, The Royal Marsden NHS Foundation Trust, London, UK
| | - Dirk de Ruysscher
- MAASTRO Clinic, GROW School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, Netherlands
| | - Elena Sperk
- Department of Radiation Oncology, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Emma Hall
- Clinical Trials and Statistics Unit, The Institute of Cancer Research, London, UK
| | - Hilary Stobart
- Patient Advocate, Independent Cancer Patients’ Voice, London, UK
| | - Jenny Chang-Claude
- Division of Cancer Epidemiology, German Cancer Research Center, Heidelberg, Germany
- University Cancer Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Kim De Ruyck
- Departments of Basic Medical Sciences and Radiotherapy, Ghent University Hospital, Ghent, Belgium
| | - Liv Veldeman
- Department of Human Structure and Repair, Ghent University, Ghent, Belgium
- Department of Radiation Oncology, Ghent University Hospital, Ghent, Belgium
| | - Manuel Altabas
- Radiation Oncology Department, Vall d’Hebron Hospital Universitari, Vall d’Hebron Barcelona Hospital Campus, Barcelona, Spain
| | | | - Marie-Pierre Farcy-Jacquet
- Fédération Universitaire d’Oncologie Radiothérapie d’Occitanie Méditérranée, Département d’Oncologie Radiothérapie, CHU Carémeau, Nîmes, France
| | - Marlon R Veldwijk
- Department of Radiation Oncology, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Matthew R Sydes
- MRC Clinical Trials Unit at UCL, Institute of Clinical Trials and Methodology, University College London, London, UK
| | - Matthew Parliament
- Division of Radiation Oncology, Department of Oncology, Cross Cancer Institute, University of Alberta, Edmonton, AB, Canada
| | - Nawaid Usmani
- Division of Radiation Oncology, Department of Oncology, Cross Cancer Institute, University of Alberta, Edmonton, AB, Canada
| | | | - Petra Seibold
- Division of Cancer Epidemiology, German Cancer Research Center, Heidelberg, Germany
| | - R Paul Symonds
- Cancer Research Centre, University of Leicester, Leicester, UK
| | - Rebecca M Elliott
- Division of Cancer Sciences, University of Manchester, Manchester Academic Health Science Centre, Christie Hospital, Manchester, UK
| | - Renée Bultijnck
- Department of Human Structure and Repair, Ghent University, Ghent, Belgium
- Department of Radiation Oncology, Ghent University Hospital, Ghent, Belgium
| | - Sara Gutiérrez-Enríquez
- Hereditary Cancer Genetics Group, Vall d’Hebron Institute of Oncology, Vall d’Hebron Hospital Campus, Barcelona, Spain
| | - Meritxell Mollà
- Radiation Oncology Department, Vall d’Hebron Hospital Universitari, Vall d’Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Sarah L Gulliford
- Department of Medical Physics and Biomedical Engineering, University College London, UK
| | - Sheryl Green
- Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Tiziana Rancati
- Data Science Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Victoria Reyes
- Radiation Oncology Department, Vall d’Hebron Hospital Universitari, Vall d’Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Ana Carballo
- Instituto de Investigación Sanitaria de Santiago de Compostela, Santiago de Compostela, Spain
- Department of Radiation Oncology, Complexo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, Spain
| | - Paula Peleteiro
- Instituto de Investigación Sanitaria de Santiago de Compostela, Santiago de Compostela, Spain
- Department of Radiation Oncology, Complexo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, Spain
| | - Paloma Sosa-Fajardo
- Instituto de Investigación Sanitaria de Santiago de Compostela, Santiago de Compostela, Spain
- Department of Radiation Oncology, Complexo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, Spain
| | - Chris Parker
- Department of Medical Physics and Biomedical Engineering, University College London, UK
| | - Valérie Fonteyne
- Department of Radiation Oncology, Ghent University Hospital, Ghent, Belgium
| | - Kerstie Johnson
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | | | - Ben Vanneste
- Department of Human Structure and Repair, Ghent University, Ghent, Belgium
- Department of Radiation Oncology, Ghent University Hospital, Ghent, Belgium
- Department of Radiation Oncology (Maastro Clinic), GROW School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Riccardo Valdagni
- Radiation Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
- Prostate Cancer Program, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Alexandra Giraldo
- Radiation Oncology Department, Vall d’Hebron Hospital Universitari, Vall d’Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Mónica Ramos
- Radiation Oncology Department, Vall d’Hebron Hospital Universitari, Vall d’Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Brenda Diergaarde
- Department of Human Genetics, School of Public Health, University of Pittsburgh, UPMC Hillman Cancer Center, Pittsburgh, PA, USA
| | - Geoffrey Liu
- Princess Margaret Cancer Centre, Temerty Faculty of Medicine, Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
| | - Suzanne M Leal
- Center for Statistical Genetics, Gertrude H. Sergievsky Center, and the Department of Neurology, Columbia University Medical Center, New York, NY, USA
- Taub Institute for Alzheimer’s Disease and the Aging Brain, Columbia University Medical Center, New York, NY, USA
| | - Melvin L K Chua
- Division of Radiation Oncology, National Cancer Centre Singapore, Singapore
- Duke-NUS Medical School, Oncology Academic Clinical Programme, Singapore
| | - Miranda Pring
- Bristol Dental School, University of Bristol, Bristol, UK
| | - Jens Overgaard
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Luis M Cascallar-Caneda
- Department of Radiation Oncology, Complexo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, Spain
| | - Fréderic Duprez
- Department of Human Structure and Repair, Ghent University, Ghent, Belgium
- Department of Radiation Oncology, Ghent University Hospital, Ghent, Belgium
| | - Christopher J Talbot
- Department of Genetics and Genome Biology, University of Leicester, Leicester, UK
| | - Gillian C Barnett
- Department of Oncology, Addenbrooke’s Hospital, University of Cambridge, Cambridge, UK
| | - Alison M Dunning
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, UK
| | - Ana Vega
- Fundación Pública Galega Medicina Xenómica, Santiago de Compostela, Spain
- Instituto de Investigación Sanitaria de Santiago de Compostela, Santiago de Compostela, Spain
- Grupo de Medicina Xenómica, Centro de Investigación Biomédica en Red de Enfermedades Raras, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Christian Nicolaj Andreassen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
- Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Johannes A Langendijk
- Department of Radiation Oncology, University Medical Center Groningen, Groningen, The Netherlands
| | - Catharine M L West
- Translational Radiobiology Group, Division of Cancer Sciences, University of Manchester, Manchester Academic Health Science Centre, Christie NHS Foundation Trust Hospital, Manchester, UK
| | - Behrooz Z Alizadeh
- Department of Epidemiology, University Medical Center Groningen, Groningen, The Netherlands
| | - Sarah L Kerns
- Department of Radiation Oncology, The Medical College of Wisconsin, Milwaukee, WI, USA
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Naderi E, Schack LMH, Welsh C, Sim AYL, Aguado-Barrera ME, Dudding T, Summersgil H, Martínez-Calvo L, Ong EHW, Odding Y, Varela-Pazos A, Steenbakkers RJHM, Crijns APG, Jena R, Pring M, Dennis J, Lobato-Busto R, Alsner J, Ness A, Nutting C, Thomson DJ, Gómez-Caamaño A, Eriksen JG, Thomas SJ, Bates AM, Overgaard J, Cascallar-Caneda LM, Duprez F, Barnett GC, Dorling L, Chua MLK, Vega A, West CML, Langendijk JA, Nicolaj Andreassen C, Alizadeh BZ. Meta-GWAS identifies the heritability of acute radiation-induced toxicities in head and neck cancer. Radiother Oncol 2022; 176:138-148. [PMID: 36191651 DOI: 10.1016/j.radonc.2022.09.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND PURPOSE We aimed to the genetic components and susceptibility variants associated with acute radiation-induced toxicities (RITs) in patients with head and neck cancer (HNC). MATERIALS AND METHODS We performed the largest meta-GWAS of seven European cohorts (n = 4,042). Patients were scored weekly during radiotherapy for acute RITs including dysphagia, mucositis, and xerostomia. We analyzed the effect of variants on the average burden (measured as area under curve, AUC) per each RIT, and standardized total average acute toxicity (STATacute) score using a multivariate linear regression. We tested suggestive variants (p < 1.0x10-5) in discovery set (three cohorts; n = 2,640) in a replication set (four cohorts; n = 1,402). We meta-analysed all cohorts to calculate RITs specific SNP-based heritability, and effect of polygenic risk scores (PRSs), and genetic correlations among RITS. RESULTS From 393 suggestive SNPs identified in discovery set; 37 were nominally significant (preplication < 0.05) in replication set, but none reached genome-wide significance (pcombined < 5 × 10-8). In-silico functional analyses identified "3'-5'-exoribonuclease activity" (FDR = 1.6e-10) for dysphagia, "inositol phosphate-mediated signalling" for mucositis (FDR = 2.20e-09), and "drug catabolic process" for STATacute (FDR = 3.57e-12) as the most enriched pathways by the RIT specific suggestive genes. The SNP-based heritability (±standard error) was 29 ± 0.08 % for dysphagia, 9 ± 0.12 % (mucositis) and 27 ± 0.09 % (STATacute). Positive genetic correlation was rg = 0.65 (p = 0.048) between dysphagia and STATacute. PRSs explained limited variation of dysphagia (3 %), mucositis (2.5 %), and STATacute (0.4 %). CONCLUSION In HNC patients, acute RITs are modestly heritable, sharing 10 % genetic susceptibility, when PRS explains < 3 % of their variance. We identified numerus suggestive SNPs, which remain to be replicated in larger studies.
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Affiliation(s)
- Elnaz Naderi
- Department of Radiation Oncology, University Medical Center Groningen, Groningen, the Netherlands; Department of Epidemiology, University Medical Center Groningen, Groningen, the Netherlands.
| | - Line M H Schack
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark; Department of Oncology, Regional Hospital West Jutland, Gødstrup, Denmark
| | - Ceilidh Welsh
- Department of Oncology, University of Cambridge, Cambridge, UK
| | - Adelene Y L Sim
- Division of Radiation Oncology, Dept of Head and Neck and Thoracic Cancers, Duke-NUS Medical School, Singapore, Singapore; Division of Medical Sciences, National Cancer Centre, Singapore
| | - Miguel E Aguado-Barrera
- Fundación Pública Galega Medicina Xenómica (FPGMX), Santiago de Compostela, Spain; Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Tom Dudding
- Bristol Dental School, University of Bristol, Bristol, UK; MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - Holly Summersgil
- Manchester Academic Health Science Centre, The Christie NHS Foundation Trust, Manchester, UK
| | - Laura Martínez-Calvo
- Fundación Pública Galega Medicina Xenómica (FPGMX), Santiago de Compostela, Spain; Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Enya H W Ong
- Division of Medical Sciences, National Cancer Centre, Singapore
| | - Yasmin Odding
- University Hospitals Bristol and Weston, Bristol, UK
| | - Ana Varela-Pazos
- Department of Radiation Oncology, Complexo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, Spain
| | - Roel J H M Steenbakkers
- Department of Radiation Oncology, University Medical Center Groningen, Groningen, the Netherlands
| | - Anne P G Crijns
- Department of Radiation Oncology, University Medical Center Groningen, Groningen, the Netherlands
| | - Rajesh Jena
- Department of Oncology, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Miranda Pring
- Bristol Dental School, University of Bristol, Bristol, UK
| | - Joe Dennis
- Centre for Cancer Genetic Epidemiology, University of Cambridge, Strangeways Research Laboratory, Cambridge, UK
| | - Ramón Lobato-Busto
- Department of Medical Physics, Complexo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, Spain
| | - Jan Alsner
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Andy Ness
- Bristol Dental School, University of Bristol, Bristol, UK
| | | | - David J Thomson
- Christie Hospital NHS Foundation Trust, Manchester, UK; Division of Cancer Sciences, University of Manchester, Manchester, United Kingdom
| | - Antonio Gómez-Caamaño
- Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Santiago de Compostela, Spain; Department of Radiation Oncology, Complexo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, Spain
| | - Jesper G Eriksen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark; Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Steve J Thomas
- Bristol Dental School, University of Bristol, Bristol, UK
| | - Amy M Bates
- Department of Oncology, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Jens Overgaard
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Luis M Cascallar-Caneda
- Department of Radiation Oncology, Complexo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, Spain
| | - Fréderic Duprez
- Department of Radiation Oncology, Ghent University Hospital, Ghent, Belgium; Department of Human Structure and Repair, Ghent University, Ghent, Belgium
| | - Gillian C Barnett
- Department of Oncology, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Leila Dorling
- Centre for Cancer Genetic Epidemiology, University of Cambridge, Strangeways Research Laboratory, Cambridge, UK
| | - Melvin L K Chua
- Division of Radiation Oncology, Dept of Head and Neck and Thoracic Cancers, Duke-NUS Medical School, Singapore, Singapore; Division of Radiation Oncology, National Cancer Centre, Singapore
| | - Ana Vega
- Fundación Pública Galega Medicina Xenómica (FPGMX), Santiago de Compostela, Spain; Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Catharine M L West
- Translational Radiobiology Group, Division of Cancer Sciences, University of Manchester, Manchester Academic Health Science Centre, Christie NHS Foundation Trust Hospital, Manchester, UK
| | - Johannes A Langendijk
- Department of Radiation Oncology, University Medical Center Groningen, Groningen, the Netherlands
| | - Christian Nicolaj Andreassen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark; Division of Cancer Sciences, University of Manchester, Manchester, United Kingdom
| | - Behrooz Z Alizadeh
- Department of Epidemiology, University Medical Center Groningen, Groningen, the Netherlands.
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Schack LMH, Naderi E, Fachal L, Dorling L, Luccarini C, Dunning AM, Ong EHW, Chua MLK, Langendijk JA, Alizadeh BZ, Overgaard J, Eriksen JG, Andreassen CN, Alsner J. A genome-wide association study of radiotherapy induced toxicity in head and neck cancer patients identifies a susceptibility locus associated with mucositis. Br J Cancer 2022; 126:1082-1090. [PMID: 35039627 PMCID: PMC8980077 DOI: 10.1038/s41416-021-01670-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 11/21/2021] [Accepted: 12/06/2021] [Indexed: 01/21/2023] Open
Abstract
PURPOSE A two-stage genome-wide association study was carried out in head and neck cancer (HNC) patients aiming to identify genetic variants associated with either specific radiotherapy-induced (RT) toxicity endpoints or a general proneness to develop toxicity after RT. MATERIALS AND METHODS The analysis included 1780 HNC patients treated with primary RT for laryngeal or oro/hypopharyngeal cancers. In a non-hypothesis-driven explorative discovery study, associations were tested in 1183 patients treated within The Danish Head and Neck Cancer Group. Significant associations were later tested in an independent Dutch cohort of 597 HNC patients and if replicated, summary data obtained from discovery and replication studies were meta-analysed. Further validation of significantly replicated findings was pursued in an Asian cohort of 235 HNC patients with nasopharynx as the primary tumour site. RESULTS We found and replicated a significant association between a locus on chromosome 5 and mucositis with a pooled OR for rs1131769*C in meta-analysis = 1.95 (95% CI 1.48-2.41; ppooled = 4.34 × 10-16). CONCLUSION This first exploratory GWAS in European cohorts of HNC patients identified and replicated a risk locus for mucositis. A larger Meta-GWAS to identify further risk variants for RT-induced toxicity in HNC patients is warranted.
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Affiliation(s)
- Line M H Schack
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark.
- Department of Oncology, Aarhus University Hospital, Aarhus, Denmark.
| | - Elnaz Naderi
- University of Groningen, University Medical Center Groningen, Department of Radiation Oncology, Groningen, The Netherlands
- University of Groningen, University Medical Center Groningen, Department of Epidemiology, Groningen, The Netherlands
| | - Laura Fachal
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, UK
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, UK
| | - Leila Dorling
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Craig Luccarini
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, UK
| | - Alison M Dunning
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, UK
| | - Enya H W Ong
- Division of Medical Sciences, National Cancer Centre Singapore, Singapore, Singapore
| | - Melvin L K Chua
- Division of Radiation Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Oncology Academic Clinical Programme, Duke-NUS Medical School, Singapore, Singapore
| | - Johannes A Langendijk
- University of Groningen, University Medical Center Groningen, Department of Radiation Oncology, Groningen, The Netherlands
| | - Behrooz Z Alizadeh
- University of Groningen, University Medical Center Groningen, Department of Radiation Oncology, Groningen, The Netherlands
- University of Groningen, University Medical Center Groningen, Department of Epidemiology, Groningen, The Netherlands
| | - Jens Overgaard
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Jesper Grau Eriksen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
- Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Christian Nicolaj Andreassen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
- Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Jan Alsner
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
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Nielsen S, Bassler N, Grzanka L, Laursen L, Swakon J, Olko P, Andreassen CN, Alsner J, Singers Sørensen B. Comparison of Coding Transcriptomes in Fibroblasts Irradiated With Low and High LET Proton Beams and Cobalt-60 Photons. Int J Radiat Oncol Biol Phys 2018; 103:1203-1211. [PMID: 30529373 DOI: 10.1016/j.ijrobp.2018.11.065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 10/27/2018] [Accepted: 11/29/2018] [Indexed: 10/27/2022]
Abstract
PURPOSE To identify differential cellular responses after proton and photon irradiation by comparing transcriptomes of primary fibroblasts irradiated with either radiation type. METHODS AND MATERIALS A panel of primary dermal fibroblast cultures was irradiated with low and higher linear energy transfer (LET) proton beams. Cobalt-60 photon irradiation was used as reference. Dose was delivered in 3 fractions of 3.5 Gy (relative biological effectiveness) using a relative biological effectiveness of 1.1 for proton doses. Cells were harvested 2 hours after the final fraction was delivered, and RNA was purified. RNA sequencing was performed using Illumina NextSeq 500 with high-output kit. The edgeR package in R was used for differential gene expression analysis. RESULTS Pairwise comparisons of the transcriptomes in the 3 treatment groups showed that there were 84 and 56 differentially expressed genes in the low LET group compared with the Cobalt-60 group and the higher LET group, respectively. The higher LET proton group and the Cobalt-60 group had the most distinct transcriptome profiles, with 725 differentially regulated genes. Differentially regulated canonical pathways and various regulatory factors involved in regulation of biological mechanisms such as inflammation, carcinogenesis, and cell cycle control were identified. CONCLUSIONS Inflammatory regulators associated with the development of normal tissue complications and malignant transformation factors seem to be differentially regulated by higher LET proton and Cobalt-60 photon irradiation. The reported transcriptome differences could therefore influence the progression of adverse effects and the risk of developing secondary cancers.
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Affiliation(s)
- Steffen Nielsen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark.
| | - Niels Bassler
- Medical Radiation Physics, Department of Physics, Stockholm University, Stockholm, Sweden
| | - Leszek Grzanka
- Proton Radiotherapy Group, Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland
| | - Louise Laursen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Jan Swakon
- Proton Radiotherapy Group, Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland
| | - Pawel Olko
- Proton Radiotherapy Group, Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland
| | | | - Jan Alsner
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Brita Singers Sørensen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
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El Naqa I, Pandey G, Aerts H, Chien JT, Andreassen CN, Niemierko A, Ten Haken RK. Radiation Therapy Outcomes Models in the Era of Radiomics and Radiogenomics: Uncertainties and Validation. Int J Radiat Oncol Biol Phys 2018; 102:1070-1073. [PMID: 30353869 DOI: 10.1016/j.ijrobp.2018.08.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 08/08/2018] [Accepted: 08/12/2018] [Indexed: 01/24/2023]
Affiliation(s)
- Issam El Naqa
- Department of Radiation Oncology, University of Michigan, Ann Arbor, Michigan.
| | - Gaurav Pandey
- Icahn Institute for Genomics and Multiscale Biology and Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Hugo Aerts
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; Department of Radiology, Dana-Farber Cancer Institute, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Jen-Tzung Chien
- Department of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, Taiwan; Department of Computer Science, National Chiao Tung University, Hsinchu, Taiwan
| | | | - Andrzej Niemierko
- Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Randall K Ten Haken
- Department of Radiation Oncology, University of Michigan, Ann Arbor, Michigan
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Nielsen S, Bassler N, Grzanka L, Swakon J, Olko P, Andreassen CN, Alsner J, Sørensen BS. Optimal reference genes for normalization of qPCR gene expression data from proton and photon irradiated dermal fibroblasts. Sci Rep 2018; 8:12688. [PMID: 30139945 PMCID: PMC6107545 DOI: 10.1038/s41598-018-30946-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 08/08/2018] [Indexed: 12/29/2022] Open
Abstract
The transcriptional response of cells exposed to proton radiation is not equivalent to the response induced by traditional photon beams. Changes in cellular signalling is most commonly studied using the method Quantitative polymerase chain reaction (qPCR). Stable reference genes must be used to accurately quantify target transcript expression. The study aim was to identify suitable reference genes for normalisation of gene expression levels in normal dermal fibroblasts irradiated with either proton or photon beams. The online tool RefFinder was used to analyse and identify the most stably expressed genes from a panel of 22 gene candidates. To assess the reliability of the identified reference genes, a selection of the most and least stable reference genes was used to normalise target transcripts of interest. Fold change levels varied considerably depending on the used reference gene. The top ranked genes IPO8, PUM1, MRPL19 and PSMC4 produced highly similar target gene expression, while expression using the worst ranked genes, TFRC and HPRT1, was clearly modified due to reference gene instability.
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Affiliation(s)
- Steffen Nielsen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark.
| | - Niels Bassler
- Medical Radiation Physics, Department of Physics, Stockholm University, Stockholm, Sweden
| | - Leszek Grzanka
- Proton Radiotherapy Group, Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland
| | - Jan Swakon
- Proton Radiotherapy Group, Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland
| | - Pawel Olko
- Proton Radiotherapy Group, Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland
| | | | - Jan Alsner
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Brita Singers Sørensen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
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7
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Nielsen S, Bassler N, Grzanka L, Swakon J, Olko P, Andreassen CN, Overgaard J, Alsner J, Sørensen BS. Differential gene expression in primary fibroblasts induced by proton and cobalt-60 beam irradiation. Acta Oncol 2017; 56:1406-1412. [PMID: 28885067 DOI: 10.1080/0284186x.2017.1351623] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
INTRODUCTION Proton beam therapy delivers a more conformal dose distribution than conventional radiotherapy, thus improving normal tissue sparring. Increasing linear energy transfer (LET) along the proton track increases the relative biological effectiveness (RBE) near the distal edge of the Spread-out Bragg peak (SOBP). The severity of normal tissue side effects following photon beam radiotherapy vary considerably between patients. AIM The dual study aim was to identify gene expression patterns specific to radiation type and proton beam position, and to assess whether individual radiation sensitivity influences gene expression levels in fibroblast cultures irradiated in vitro. METHODS The study includes 30 primary fibroblast cell cultures from patients previously classified as either radiosensitive or radioresistant. Cells were irradiated at three different positions in the proton beam profile: entrance, mid-SOBP and at the SOBP distal edge. Dose was delivered in three fractions × 3.5 Gy(RBE) (RBE 1.1). Cobalt-60 (Co-60) irradiation was used as reference. Real-time qPCR was performed to determine gene expression levels for 17 genes associated with inflammation response, fibrosis and angiogenesis. RESULTS Differences in median gene expression levels were observed for multiple genes such as IL6, IL8 and CXCL12. Median IL6 expression was 30%, 24% and 47% lower in entrance, mid-SOBP and SOBP distal edge groups than in Co-60 irradiated cells. No genes were found to be oppositely regulated by different radiation qualities. Radiosensitive patient samples had the strongest regulation of gene expression; irrespective of radiation type. CONCLUSIONS Our findings indicate that the increased LET at the SOBP distal edge position did not generally lead to increased transcriptive response in primary fibroblast cultures. Inflammatory factors were generally less extensively upregulated by proton irradiation compared with Co-60 photon irradiation. These effects may possibly influence the development of normal tissue damage in patients treated with proton beam therapy.
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Affiliation(s)
- Steffen Nielsen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Niels Bassler
- Medical Radiation Physics, Department of Physics, Stockholm University, Stockholm, Sweden
| | - Leszek Grzanka
- Proton Radiotherapy Group, Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland
| | - Jan Swakon
- Proton Radiotherapy Group, Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland
| | - Pawel Olko
- Proton Radiotherapy Group, Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland
| | | | - Jens Overgaard
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Jan Alsner
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
| | - Brita Singers Sørensen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
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Azria D, Lapierre A, Gourgou S, De Ruysscher D, Colinge J, Lambin P, Brengues M, Ward T, Bentzen SM, Thierens H, Rancati T, Talbot CJ, Vega A, Kerns SL, Andreassen CN, Chang-Claude J, West CML, Gill CM, Rosenstein BS. Data-Based Radiation Oncology: Design of Clinical Trials in the Toxicity Biomarkers Era. Front Oncol 2017; 7:83. [PMID: 28497027 PMCID: PMC5406456 DOI: 10.3389/fonc.2017.00083] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 04/13/2017] [Indexed: 12/15/2022] Open
Abstract
The ability to stratify patients using a set of biomarkers, which predict that toxicity risk would allow for radiotherapy (RT) modulation and serve as a valuable tool for precision medicine and personalized RT. For patients presenting with tumors with a low risk of recurrence, modifying RT schedules to avoid toxicity would be clinically advantageous. Indeed, for the patient at low risk of developing radiation-associated toxicity, use of a hypofractionated protocol could be proposed leading to treatment time reduction and a cost-utility advantage. Conversely, for patients predicted to be at high risk for toxicity, either a more conformal form or a new technique of RT, or a multidisciplinary approach employing surgery could be included in the trial design to avoid or mitigate RT when the potential toxicity risk may be higher than the risk of disease recurrence. In addition, for patients at high risk of recurrence and low risk of toxicity, dose escalation, such as a greater boost dose, or irradiation field extensions could be considered to improve local control without severe toxicities, providing enhanced clinical benefit. In cases of high risk of toxicity, tumor control should be prioritized. In this review, toxicity biomarkers with sufficient evidence for clinical testing are presented. In addition, clinical trial designs and predictive models are described for different clinical situations.
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Affiliation(s)
- David Azria
- Department of Radiation Oncology, Radiobiology Unit, Biometric and Bio-informatic Divisions, Montpellier Cancer Institute (ICM), IRCM, INSERM U1194, Montpellier, France
| | - Ariane Lapierre
- Department of Radiation Oncology, Radiobiology Unit, Biometric and Bio-informatic Divisions, Montpellier Cancer Institute (ICM), IRCM, INSERM U1194, Montpellier, France
| | - Sophie Gourgou
- Department of Radiation Oncology, Radiobiology Unit, Biometric and Bio-informatic Divisions, Montpellier Cancer Institute (ICM), IRCM, INSERM U1194, Montpellier, France
| | - Dirk De Ruysscher
- Department of Radiation Oncology, Maastricht University Medical Centre, MAASTRO Clinic, Maastricht, Netherlands
- Radiation Oncology, KU Leuven, Leuven, Belgium
| | - Jacques Colinge
- Department of Radiation Oncology, Radiobiology Unit, Biometric and Bio-informatic Divisions, Montpellier Cancer Institute (ICM), IRCM, INSERM U1194, Montpellier, France
| | - Philippe Lambin
- Department of Radiation Oncology, Maastricht University Medical Centre, MAASTRO Clinic, Maastricht, Netherlands
| | - Muriel Brengues
- Department of Radiation Oncology, Radiobiology Unit, Biometric and Bio-informatic Divisions, Montpellier Cancer Institute (ICM), IRCM, INSERM U1194, Montpellier, France
| | - Tim Ward
- Patient Advocate, Manchester, UK
| | - Søren M. Bentzen
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Hubert Thierens
- Department of Basic Medical Sciences, Ghent University, Ghent, Belgium
| | - Tiziana Rancati
- Prostate Cancer Program, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | | | - Ana Vega
- Fundacion Publica Galega de Medicina Xenomica-SERGAS, Grupo de Medicina Xenomica-USC, IDIS, CIBERER, Santiago de Compostela, Spain
| | - Sarah L. Kerns
- Department of Radiation Oncology, University of Rochester Medical Center, Rochester, NY, USA
| | | | - Jenny Chang-Claude
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Catharine M. L. West
- Division of Cancer Sciences, University of Manchester, Manchester Academic Health Science Centre, Christie Hospital NHS Trust, Manchester, UK
| | - Corey M. Gill
- Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Barry S. Rosenstein
- Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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9
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Affiliation(s)
- Line H. Schack
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Denmark
| | - Jan Alsner
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Denmark
| | - Jens Overgaard
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Denmark
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Andreassen CN, Rosenstein BS, Kerns SL, Ostrer H, De Ruysscher D, Cesaretti JA, Barnett GC, Dunning AM, Dorling L, West CML, Burnet NG, Elliott R, Coles C, Hall E, Fachal L, Vega A, Gómez-Caamaño A, Talbot CJ, Symonds RP, De Ruyck K, Thierens H, Ost P, Chang-Claude J, Seibold P, Popanda O, Overgaard M, Dearnaley D, Sydes MR, Azria D, Koch CA, Parliament M, Blackshaw M, Sia M, Fuentes-Raspall MJ, Ramon Y Cajal T, Barnadas A, Vesprini D, Gutiérrez-Enríquez S, Mollà M, Díez O, Yarnold JR, Overgaard J, Bentzen SM, Alsner J. Individual patient data meta-analysis shows a significant association between the ATM rs1801516 SNP and toxicity after radiotherapy in 5456 breast and prostate cancer patients. Radiother Oncol 2016; 121:431-439. [PMID: 27443449 PMCID: PMC5559879 DOI: 10.1016/j.radonc.2016.06.017] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 06/18/2016] [Accepted: 06/29/2016] [Indexed: 12/31/2022]
Abstract
PURPOSE Several small studies have indicated that the ATM rs1801516 SNP is associated with risk of normal tissue toxicity after radiotherapy. However, the findings have not been consistent. In order to test this SNP in a well-powered study, an individual patient data meta-analysis was carried out by the International Radiogenomics Consortium. MATERIALS AND METHODS The analysis included 5456 patients from 17 different cohorts. 2759 patients were given radiotherapy for breast cancer and 2697 for prostate cancer. Eight toxicity scores (overall toxicity, acute toxicity, late toxicity, acute skin toxicity, acute rectal toxicity, telangiectasia, fibrosis and late rectal toxicity) were analyzed. Adjustments were made for treatment and patient related factors with potential impact on the risk of toxicity. RESULTS For all endpoints except late rectal toxicity, a significantly increased risk of toxicity was found for carriers of the minor (Asn) allele with odds ratios of approximately 1.5 for acute toxicity and 1.2 for late toxicity. The results were consistent with a co-dominant pattern of inheritance. CONCLUSION This study convincingly showed a significant association between the ATM rs1801516 Asn allele and increased risk of radiation-induced normal tissue toxicity.
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Affiliation(s)
| | - Barry S Rosenstein
- Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Sarah L Kerns
- Department of Radiation Oncology, University of Rochester Medical Center, USA; Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Harry Ostrer
- Departments of Pathology and Pediatrics, Albert Einstein College of Medicine, New York, USA
| | - Dirk De Ruysscher
- Department of Radiotherapy (Maastro Clinic), Maastricht University Medical Center, The Netherlands
| | | | - Gillian C Barnett
- Department of Oncology, Cambridge University Hospitals NHS Foundation Trust, UK; Centre for Cancer Genetic Epidemiology, Strangeways Research Laboratory, University of Cambridge, UK
| | - Alison M Dunning
- Department of Oncology, Cambridge University Hospitals NHS Foundation Trust, UK; Centre for Cancer Genetic Epidemiology, Strangeways Research Laboratory, University of Cambridge, UK
| | - Leila Dorling
- Centre for Cancer Genetic Epidemiology, Strangeways Research Laboratory, University of Cambridge, UK
| | - Catharine M L West
- Institute of Cancer Sciences, University of Manchester, The Christie NHS Foundation Trust, UK
| | - Neil G Burnet
- Department of Oncology, Cambridge University Hospitals NHS Foundation Trust, UK
| | - Rebecca Elliott
- Department of Oncology, Cambridge University Hospitals NHS Foundation Trust, UK
| | - Charlotte Coles
- Department of Oncology, Cambridge University Hospitals NHS Foundation Trust, UK
| | - Emma Hall
- Clinical Trials & Statistics Unit (ICR-CTSU), The Institute of Cancer Research, London, UK
| | - Laura Fachal
- Fundacion Publica Galega de Medicina Xenomica-SERGAS, Grupo de Medicina Xenomica-USC, IDIS, CIBERER, Santiago de Compostela, Spain
| | - Ana Vega
- Fundacion Publica Galega de Medicina Xenomica-SERGAS, Grupo de Medicina Xenomica-USC, IDIS, CIBERER, Santiago de Compostela, Spain
| | - Antonio Gómez-Caamaño
- Department of Radiation Oncology, Complexo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, Spain
| | | | - R Paul Symonds
- Department of Cancer Studies, University of Leicester, UK
| | - Kim De Ruyck
- Department of Basic Medical Sciences, Ghent University, Belgium
| | - Hubert Thierens
- Department of Basic Medical Sciences, Ghent University, Belgium
| | - Piet Ost
- Department of Radiotherapy, Ghent University Hospital, Belgium
| | - Jenny Chang-Claude
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany; University Cancer Center Hamburg, University (UCCH), University Medical Center Hamburg-Eppendorf, Germany
| | - Petra Seibold
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Odilia Popanda
- Division of Epigenomics and Cancer Risk Factors, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Marie Overgaard
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Denmark
| | - David Dearnaley
- The Institute of Cancer Research and Royal Marsden NHS Foundation Trust, London, UK
| | | | - David Azria
- Department of Radiation Oncology and Medical Physics, Institut regional du Cancer Montpellier, France
| | - Christine Anne Koch
- Radiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Matthew Parliament
- Department of Oncology, Cross Cancer Institute, University of Alberta, Edmonton, Canada
| | - Michael Blackshaw
- Department of Oncology, Cross Cancer Institute, University of Alberta, Edmonton, Canada
| | - Michael Sia
- Department of Radiation Oncology, British Columbia Cancer Agency Abbotsford Clinic, Canada
| | | | - Teresa Ramon Y Cajal
- Medical Oncology Department, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Agustin Barnadas
- Medical Oncology Department, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Danny Vesprini
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, Toronto, Canada
| | - Sara Gutiérrez-Enríquez
- Oncogenetics Group, Vall d'Hebron Institute of Oncology (VHIO), Universitat Autònoma de Barcelona, Spain
| | - Meritxell Mollà
- Department of Radiation Oncology, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Orland Díez
- Oncogenetics Group, Vall d'Hebron Institute of Oncology (VHIO), Area of Clinical and Molecular Genetics, Vall d'Hebron University Hospital, Barcelona, Spain
| | - John R Yarnold
- The Institute of Cancer Research and Royal Marsden NHS Foundation Trust, London, UK
| | - Jens Overgaard
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Denmark
| | - Søren M Bentzen
- Greenebaum Cancer Center and Department of Epidemiology & Public Health, University of Maryland School of Medicine, Baltimore, USA
| | - Jan Alsner
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Denmark
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Andreassen CN, Schack LMH, Laursen LV, Alsner J. Radiogenomics – current status, challenges and future directions. Cancer Lett 2016; 382:127-136. [DOI: 10.1016/j.canlet.2016.01.035] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 01/06/2016] [Accepted: 01/08/2016] [Indexed: 12/22/2022]
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Rosenstein BS, West CM, Bentzen SM, Alsner J, Andreassen CN, Azria D, Barnett GC, Baumann M, Burnet N, Chang-Claude J, Chuang EY, Coles CE, Dekker A, De Ruyck K, De Ruysscher D, Drumea K, Dunning AM, Easton D, Eeles R, Fachal L, Gutiérrez-Enríquez S, Haustermans K, Henríquez-Hernández LA, Imai T, Jones GDD, Kerns SL, Liao Z, Onel K, Ostrer H, Parliament M, Pharoah PDP, Rebbeck TR, Talbot CJ, Thierens H, Vega A, Witte JS, Wong P, Zenhausern F. Radiogenomics: radiobiology enters the era of big data and team science. Int J Radiat Oncol Biol Phys 2014; 89:709-13. [PMID: 24969789 PMCID: PMC5119272 DOI: 10.1016/j.ijrobp.2014.03.009] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Revised: 02/19/2014] [Accepted: 03/06/2014] [Indexed: 11/16/2022]
Affiliation(s)
- Barry S Rosenstein
- Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, New York; Departments of Genetics and Genomic Sciences, Dermatology, and Preventive Medicine, Icahn School of Medicine at Mount Sinai, New York, New York; Department of Radiation Oncology, New York University School of Medicine, New York, New York.
| | - Catharine M West
- Translational Radiobiology Group, Institute of Cancer Sciences, The University of Manchester, Manchester Academic Health Science Centre, Christie Hospital, Manchester, UK
| | - Søren M Bentzen
- Division of Biostatistics and Bioinformatics, University of Maryland Greenebaum Cancer Center, and Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland
| | - Jan Alsner
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
| | | | - David Azria
- Department of Radiation Oncology, Institute of Cancer of Montpellier (INSERM), Center for Cancer Research, Montpellier, France
| | - Gillian C Barnett
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK; Department of Oncology, Centre for Cancer Genetic Epidemiology, University of Cambridge, Strangeways Research Laboratory, Cambridge, UK
| | - Michael Baumann
- Department of Radiation Oncology and OncoRay National Center for Radiation Research in Oncology, Technische Universität Dresden, and Helmholtz-Zentrum Dresden-Rossendorf Dresden, Germany
| | - Neil Burnet
- University of Cambridge Department of Oncology, Cambridge Biomedical Campus, Addenbrooke's Hospital, Cambridge, UK
| | - Jenny Chang-Claude
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Eric Y Chuang
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan
| | | | - Andre Dekker
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Kim De Ruyck
- Department of Basic Medical Sciences, Ghent University, Ghent, Belgium
| | - Dirk De Ruysscher
- Radiation Oncology, University Hospitals Leuven, and Department of Oncology, KU Leuven, Belgium
| | - Karen Drumea
- Department of Oncology, Rambam Health Care Campus, Haifa, Israel
| | - Alison M Dunning
- Department of Oncology, Centre for Cancer Genetic Epidemiology, University of Cambridge, Strangeways Research Laboratory, Cambridge, UK
| | - Douglas Easton
- Department of Public Health and Primary Care and Department of Oncology, University of Cambridge, Cambridge, UK
| | - Rosalind Eeles
- Division of Cancer Genetics and Epidemiology, The Institute of Cancer Research, Sutton, UK
| | - Laura Fachal
- Fundación Pública Galega de Medicina Xenómica-SERGAS, Grupo de Medicina Xenómica-USC, CIBERER, IDIS, Santiago de Compostela, Spain
| | - Sara Gutiérrez-Enríquez
- Oncogenetics Group, Vall d'Hebron Institute of Oncology (VHIO), Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Karin Haustermans
- Radiation Oncology, University Hospitals Leuven, and Department of Oncology, KU Leuven, Belgium
| | | | - Takashi Imai
- Advanced Radiation Biology Research Program, Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan
| | - George D D Jones
- Department Cancer Studies and Molecular Medicine, University of Leicester, Leicester, UK
| | - Sarah L Kerns
- Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Zhongxing Liao
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Kenan Onel
- Department of Pediatrics, The University of Chicago, Chicago, Illinois
| | - Harry Ostrer
- Departments of Pathology, Genetics and Pediatrics, Albert Einstein College of Medicine at Yeshiva University, New York, New York
| | - Matthew Parliament
- Department of Radiation Oncology, Cross Cancer Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Paul D P Pharoah
- Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Timothy R Rebbeck
- Department of Biostatistics and Epidemiology, Center for Clinical Epidemiology and Biostatistics, and Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | | | - Hubert Thierens
- Department of Basic Medical Sciences, Ghent University, Ghent, Belgium
| | - Ana Vega
- Fundación Pública Galega de Medicina Xenómica-SERGAS, Grupo de Medicina Xenómica-USC, CIBERER, IDIS, Santiago de Compostela, Spain
| | - John S Witte
- Department of Epidemiology and Biostatistics, Institute for Human Genetics, University of California, San Francisco, California
| | - Philip Wong
- Department of Radiation Oncology, Centre Hospitalier de l'Université de Montréal, Montréal, Quebec, Canada
| | - Frederic Zenhausern
- Department of Basic Medical Sciences, Center for Applied Nanobioscience and Medicine, College of Medicine Phoenix, University of Arizona, Phoenix, Arizona
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Andreassen CN, Dikomey E, Parliament M, West CML. Will SNPs be useful predictors of normal tissue radiosensitivity in the future? Radiother Oncol 2013; 105:283-8. [PMID: 23245645 DOI: 10.1016/j.radonc.2012.11.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Accepted: 11/17/2012] [Indexed: 01/09/2023]
Abstract
The ability to predict individual risk of radiation-induced normal tissue complications is a long sought goal in radiobiology. The last decade saw increasing interest in identifying associations between single nucleotide polymorphisms (SNPs) and normal tissue complication risk. Nevertheless, it remains controversial whether SNPs will be useful predictors of normal tissue radiosensitivity. This paper provides a summary of a scientific debate held at the 31st ESTRO conference in which four scientists argued in favor or against the motion that SNPs will be useful predictors of normal tissue radiosensitivity in the future.
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Andreassen CN, Eriksen JG. The psychosocial work environment among physicians employed at Danish oncology departments in 2009. A nationwide cross-sectional study. Acta Oncol 2013; 52:138-46. [PMID: 23033812 DOI: 10.3109/0284186x.2012.702926] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
UNLABELLED Working as a physician at an oncology department has some distinctive characteristics that may lead to a stressful work environment. The present study was conducted to provide a nationwide description of the work conditions of all oncologists in Denmark. By comparing the results of the present study with those of a similar study carried out in 2006, the aim was furthermore to elucidate changes in the psychosocial work environment over time. MATERIAL AND METHODS From May to September 2009, 330 physicians employed at six oncology centres and seven community based oncology departments were invited to participate in a survey based on the short version of the COPSOQ II questionnaire. The results were compared with data from a representative section of Danish employees and with data from the 2006 survey. RESULTS Two hundred and twenty of the 330 invited physicians returned the questionnaire (response rate 67%). Concerning the aspects quantitative demands, work pace, emotional demands, influence, burnout and stress, the oncologists reported worse work conditions than the average Danish employee. However, with regard to possibilities for development, meaning of work and commitment to workplace, the oncologists reported better work conditions. Between 2006 and 2009, substantial improvement was seen concerning several of the assessed work environment aspects within the group of young physicians at the oncology centres. CONCLUSION Though substantial improvement of the work conditions has been achieved between 2006 and 2009, certain aspects of the psychosocial work environment at Danish oncology departments still require attention.
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Andreassen CN. Searching for genetic determinants of normal tissue radiosensitivity – Are we on the right track? Radiother Oncol 2010; 97:1-8. [DOI: 10.1016/j.radonc.2010.07.018] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Revised: 07/27/2010] [Accepted: 07/27/2010] [Indexed: 01/24/2023]
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Andreassen CN, Alsner J. Genetic variants and normal tissue toxicity after radiotherapy: a systematic review. Radiother Oncol 2009; 92:299-309. [PMID: 19683821 DOI: 10.1016/j.radonc.2009.06.015] [Citation(s) in RCA: 132] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2009] [Revised: 06/23/2009] [Accepted: 06/24/2009] [Indexed: 12/11/2022]
Abstract
During the last decade, nearly 60 studies have addressed possible associations between various genetic sequence alterations and risk of adverse reactions after radiotherapy. We report here an overview of these studies with information on the genetic variants, tumour type, number of patients included, the endpoint studied, the mechanism(s) by which the candidate genes are involved in the pathogenesis of normal tissue toxicity, and odds ratios (ORs) for candidate variants. Though many positive results have been reported, inconsistent findings and non-replication of previous results have frequently occurred. This can presumably be attributed to certain methodological shortcomings including lack of statistical power to detect small effect sizes. Based on theoretical considerations and experiences from other scientific fields, we discuss how future studies should be designed in order to successfully unravel the genetics of normal tissue radiosensitivity. We propose a model of the allelic architecture that may underlie differences in normal tissue radiosensitivity. Genome wide association studies have proven a powerful tool to identify novel loci that affect various phenotypes. Nonetheless, genome wide association studies are extremely demanding in terms of sample size. Furthermore, certain limitations still relate to this kind of studies, emphasizing the need for international consortia such as the ESTRO GENEPI.
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Abstract
During the last decade, a number of studies have supported the hypothesis that there is an important genetic component to the observed interpatient variability in normal tissue toxicity after radiotherapy. This review summarizes the candidate gene association studies published so far on the risk of radiation-induced morbidity and highlights some recent successful whole-genome association studies showing feasibility in other research areas. Future genetic association studies are discussed in relation to methodological problems such as the characterization of clinical and biological phenotypes, genetic haplotypes, and handling of confounding factors. Finally, candidate gene studies elucidating the genetic component of radiation-induced morbidity and the functional consequences of single nucleotide polymorphisms by studying intermediate phenotypes will be discussed.
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Affiliation(s)
- Jan Alsner
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark.
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Andreassen CN, Alsner J, Overgaard M, Sørensen FB, Overgaard J. Risk of radiation-induced subcutaneous fibrosis in relation to single nucleotide polymorphisms in TGFB1, SOD2, XRCC1, XRCC3, APEX and ATM--a study based on DNA from formalin fixed paraffin embedded tissue samples. Int J Radiat Biol 2006; 82:577-86. [PMID: 16966185 DOI: 10.1080/09553000600876637] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [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: 10/24/2022]
Abstract
PURPOSE In two previously published studies, associations with risk of radiation-induced subcutaneous fibrosis were found for single nucleotide polymorphisms (SNP) in TGFB1 (transforming growth factor beta 1 gene), XRCC1 (X-ray repair cross-complementing 1 gene), XRCC3 (X-ray repair cross-complementing 3 gene), SOD2 (manganese superoxide dismutase gene) and ATM (gene of ataxia telangiectasia mutated). The present study was conducted to seek a confirmation of these findings. MATERIALS AND METHODS Like the 41 patients previously investigated, the 120 subjects included in the present study were accrued from a historical cohort of 319 post-mastectomy radiotherapy patients. All patients received hypo-fractionated radiotherapy. The TGFB1 position--509, codons 10 and 25, XRCC1 codons 194, 280 and 399, XRCC3 codon 241, SOD2 codon 16, ATM codon 1853 and APEX (apurinic/apyrimidinic exonuclease gene) codon 148 polymorphisms were assessed based on archival histological material. Differences in fibrosis risk were quantified from dose-response assessments. RESULTS For none of the investigated polymorphisms, significant associations with risk of subcutaneous fibrosis were observed. A detailed analysis did not reveal any obvious explanation for the discrepancy between the previous and the present study. CONCLUSION The previously observed associations with risk of radiation-induced subcutaneous fibrosis could not be replicated in the present study. Further studies are needed to elucidate the influence of genetic variation upon normal tissue radiosensitivity.
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Affiliation(s)
- C N Andreassen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Denmark.
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Abstract
Over the last decade, increasing efforts have been taken to establish associations between various genetic germline alterations and risk of normal tissue complications after radiotherapy. Though the studies have been relatively small and methodologically heterogeneous, preliminary indications have been provided that single nucleotide polymorphisms in the genes TGFB1 and ATM may modulate risk of particularly late toxicity. In addition, rare ATM alterations may enhance complication susceptibility. Nevertheless, we are still far from having an exhaustive understanding of the genetics that may underlie differences in clinical normal tissue radiosensitivity. Recent technical advances and emerging insights to the structure of inter-individual genetic variation open up unprecedented opportunities to dissect the molecular and genetic basis of normal tissue radiosensitivity. However, to fully exploit these new possibilities well-planed large-scale clinical studies are mandatory. Currently, international initiatives are taken to establish the bio banks and databases needed for this task.
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Andreassen CN, Alsner J, Overgaard J, Herskind C, Haviland J, Owen R, Homewood J, Bliss J, Yarnold J. TGFB1 polymorphisms are associated with risk of late normal tissue complications in the breast after radiotherapy for early breast cancer. Radiother Oncol 2005; 75:18-21. [PMID: 15878096 DOI: 10.1016/j.radonc.2004.12.012] [Citation(s) in RCA: 112] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2004] [Revised: 12/06/2004] [Accepted: 12/14/2004] [Indexed: 11/23/2022]
Abstract
Recent studies suggest that normal tissue radiosensitivity is influenced by single nucleotide polymorphisms (SNPs) in certain genes. In order to seek a confirmation of these findings, this study investigated SNPs in genes TGFB1 (position -509, codon 10 and codon 25), SOD2 (codon 16), XRCC1 (codon 399), XRCC3 (codon 241), APEX (codon 148) and ATM (codon 1853) in 26 breast cancer patients with marked changes in breast appearance after radiotherapy and 26 matched controls. Statistically significant associations were found between the TGFB1 codon 10 Pro allele (P=0.005) as well as the TGFB1 position -509 T allele (P=0.018) and increased risk of altered breast appearance. No significant associations were found for the remaining SNPs.
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Andreassen CN, Sørensen FB, Overgaard J, Alsner J. Optimisation and validation of methods to assess single nucleotide polymorphisms (SNPs) in archival histological material. Radiother Oncol 2005; 72:351-6. [PMID: 15450735 DOI: 10.1016/j.radonc.2004.07.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2004] [Revised: 06/26/2004] [Accepted: 06/28/2004] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND PURPOSE An increasing amount of evidence indicates that single nucleotide polymorphisms (SNPs) may affect a variety of oncology related phenotypes. Occasionally, it is convenient to base studies addressing genotype-phenotype relationships on historical patient cohorts, from which only archival specimens are available. This study was conducted to validate protocols optimised for assessment of SNPs based on paraffin embedded, formalin fixed tissue samples. PATIENTS AND METHODS In 137 breast cancer patients, three TGFB1 SNPs were assessed based on archival histological specimens. In 37 of these patients, the SNPs were also assessed using cultured fibroblasts and the assays were validated by direct comparison of the results. From the remaining 100 patients, only archival material was available. In these patients, the existence of a genetic linkage pattern between the assessed TGFB1 SNPs was used to provide an indirect validation of the genotyping results. Furthermore, two different methods for DNA extraction were compared (semi-automatic DNA extraction using the ABI Prism 6100 Nucleic Acid PrepStation versus Proteinase K digestion for 5 days followed by boiling and DNA precipitation). RESULTS Assessment of SNPs based on archival histological material is encumbered by a number of obstacles and pitfalls. However, these can be widely overcome by careful optimisation of the methods used for sample selection, DNA extraction and PCR. Within 130 samples that fulfil the criteria for analysis a highly reliable SNP assessment was observed. The study demonstrated that different 'down-stream applications' ('single nucleotide primer extension' or 'TaqMan-based' real-time PCR) could be used as genotyping procedure. CONCLUSIONS Reliable assessment of SNPs in formalin-fixed paraffin-embedded specimens is possible but a number of precautions should be carefully taken.
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Affiliation(s)
- C N Andreassen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Noerrebrogade 44, DK 8000 Aarhus C, Denmark
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Abstract
BACKGROUND AND PURPOSE Single nucleotide polymorphisms (SNPs) in genes related to the biological response to radiation injury may affect clinical normal tissue radiosensitivity. This study investigates whether seven selected SNPs in five candidate genes influence risk of subcutaneous fibrosis and telangiectasia after radiotherapy. PATIENTS AND METHODS The 41 patients included in this study were given post-mastectomy radiotherapy in 1978-1982 and subsequently evaluated in detail with regard to several different normal tissue reactions. SNPs in TGFB1 (codons 10, 25 and position -509), SOD2 (codon 16), XRCC3 (codon 241), XRCC1 (codon 399) and APEX (codon 148) were analyzed by PCR and single nucleotide primer extension. Dose-response curves were established for subcutaneous fibrosis and telangiectasia in patients with different genotypes. Differences in radiosensitivity were quantified in terms of ED(50) values and enhancement ratios. RESULTS For TGFB1, the Pro/Pro genotype in codon 10 and the T/T genotype in position -509 correlated positively with risk of subcutaneous fibrosis. The SOD 2 codon 16 Val/Ala genotype was associated with increased risk of subcutaneous fibrosis when compared to the Val/Val genotype. The Thr/Thr genotype in XRCC3 codon 241 correlated with increased risk of subcutaneous fibrosis as well as telangiectasia. The Arg/Arg genotype in XRCC1 codon 399 was associated with increased risk of radiation-induced subcutaneous fibrosis. For these polymorphisms, enhancement ratios between 1.09 and 1.25 were found. Combined analysis of multiple SNPs demonstrated that the risk of subcutaneous fibrosis correlated with the number of risk alleles in such a manner that patients with few risk alleles exhibited a remarkable degree of radioresistance. CONCLUSION The present study established significant correlations between five SNPs and risk of radiation-induced normal tissue reactions. These findings support the assumption that clinical normal tissue radiosensitivity should be regarded as a phenomenon dependent on the combined effect of variation in several genes and indicate that models based on multiple genetic markers may have the potential to predict normal tissue responses after radiotherapy.
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Affiliation(s)
- Christian Nicolaj Andreassen
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Noerrebrogade 44, Aarhus C DK 8000, Denmark
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Abstract
The use of chemical radioprotectors represents an obvious strategy to improve the therapeutic index in radiotherapy. Amofostine (WR-2721) has recently been approved for use in head and neck cancer to protect against radiation-induced xerostomia. Currently, the question has arisen whether amifostine could be used for radioprotection in broader terms. Amifostine may have the potential to enable intensified treatment by ameliorating mucosal reactions that are often a limiting factor in accelerated fractionation or concomitant chemoradiation. However, it has as yet not been clarified whether sufficient amifostine to reduce mucositis can be administered before each radiation fraction without causing unacceptable toxicity. Also, the optimal dosage and schedule of amifostine in chemoradiation combinations have not yet been established. The major concern related to radioprotectiors is the potential hazard of collateral tumor protection. A number of clinical studies have concluded that amifostine does not reduce antitumor efficacy. However, not even the largest study conducted, with over 300 patients, has sufficient statistical power to detect a clinically significant reduction in tumor control rate. To put this issue ultimately to a rest, a clinical trial with a sufficient accrual to definitely rule out a tumor protective effect of amifostine needs to be conducted. Substances reducing radiation-induced toxicity by modulating the biological response to radiation injury may represent an alternative concept in radioprotection. However, such agents are still at a developmental stage.
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Andreassen CN, Alsner J, Overgaard J. Does variability in normal tissue reactions after radiotherapy have a genetic basis – where and how to look for it? Radiother Oncol 2002; 64:131-40. [PMID: 12242122 DOI: 10.1016/s0167-8140(02)00154-8] [Citation(s) in RCA: 139] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Cancer patients exhibit large patient-to-patient variability in normal tissue reactions after radiotherapy. Several observations support the hypothesis that clinical normal tissue radiosensitivity is influenced by genetic factors. However, very little is known about the genetic variation possibly underlying inter-individual differences in normal tissue reactions when unselected cancer patients undergo radiotherapy. It seems reasonable to assume that clinical radiosensitivity of normal tissues should be regarded as a so-called complex trait depending on the combined effect of several different genetic alterations. Single nucleotide polymorphisms (SNPs) make up 90% of naturally occurring sequence variation in the human genome and SNPs in genes related to the biological response to ionising radiation may affect clinical radiosensitivity. Rare genetic variants could also possibly play an important role. Thus, the 'allelic architecture' underlying differences in normal tissue reactions may be rather complicated. Recent advances in high throughput genotyping and bio-informatics provide unprecedented opportunities to unravel the genetic basis of clinical normal tissue radiosensitivity. However, to achieve maximum benefit from these advances, carefully designed clinical studies with an accrual of hundreds or thousands of patients are probably needed.
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