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Common variants associated with breast cancer in genome-wide association studies are modifiers of breast cancer risk in BRCA1 and BRCA2 mutation carriers

Identifieur interne : 001880 ( Pmc/Corpus ); précédent : 001879; suivant : 001881

Common variants associated with breast cancer in genome-wide association studies are modifiers of breast cancer risk in BRCA1 and BRCA2 mutation carriers

Auteurs : Xianshu Wang ; V. Shane Pankratz ; Zachary Fredericksen ; Robert Tarrell ; Mary Karaus ; Lesley Mcguffog ; Paul D. P. Pharaoh ; Bruce A. J. Ponder ; Alison M. Dunning ; Susan Peock ; Margaret Cook ; Clare Oliver ; Debra Frost ; Olga M. Sinilnikova ; Dominique Stoppa-Lyonnet ; Sylvie Mazoyer ; Claude Houdayer ; Frans B. L. Hogervorst ; Maartje J. Hooning ; Marjolijn J. Ligtenberg ; Amanda Spurdle ; Georgia Chenevix-Trench ; Rita K. Schmutzler ; Barbara Wappenschmidt ; Christoph Engel ; Alfons Meindl ; Susan M. Domchek ; Katherine L. Nathanson ; Timothy R. Rebbeck ; Christian F. Singer ; Daphne Gschwantler-Kaulich ; Catherina Dressler ; Anneliese Fink ; Csilla I. Szabo ; Michal Zikan ; Lenka Foretova ; Kathleen Claes ; Gilles Thomas ; Robert N. Hoover ; David J. Hunter ; Stephen J. Chanock ; Douglas F. Easton ; Antonis C. Antoniou ; Fergus J. Couch

Source :

RBID : PMC:2893806

Abstract

Recent studies have identified single nucleotide polymorphisms (SNPs) that significantly modify breast cancer risk in BRCA1 and BRCA2 mutation carriers. Since these risk modifiers were originally identified as genetic risk factors for breast cancer in genome-wide association studies (GWASs), additional risk modifiers for BRCA1 and BRCA2 may be identified from promising signals discovered in breast cancer GWAS. A total of 350 SNPs identified as candidate breast cancer risk factors (P < 1 × 10−3) in two breast cancer GWAS studies were genotyped in 3451 BRCA1 and 2006 BRCA2 mutation carriers from nine centers. Associations with breast cancer risk were assessed using Cox models weighted for penetrance. Eight SNPs in BRCA1 carriers and 12 SNPs in BRCA2 carriers, representing an enrichment over the number expected, were significantly associated with breast cancer risk (Ptrend < 0.01). The minor alleles of rs6138178 in SNRPB and rs6602595 in CAMK1D displayed the strongest associations in BRCA1 carriers (HR = 0.78, 95% CI: 0.69–0.90, Ptrend = 3.6 × 10−4 and HR = 1.25, 95% CI: 1.10–1.41, Ptrend = 4.2 × 10−4), whereas rs9393597 in LOC134997 and rs12652447 in FBXL7 showed the strongest associations in BRCA2 carriers (HR = 1.55, 95% CI: 1.25–1.92, Ptrend = 6 × 10−5 and HR = 1.37, 95% CI: 1.16–1.62, Ptrend = 1.7 × 10−4). The magnitude and direction of the associations were consistent with the original GWAS. In subsequent risk assessment studies, the loci appeared to interact multiplicatively for breast cancer risk in BRCA1 and BRCA2 carriers. Promising candidate SNPs from GWAS were identified as modifiers of breast cancer risk in BRCA1 and BRCA2 carriers. Upon further validation, these SNPs together with other genetic and environmental factors may improve breast cancer risk assessment in these populations.


Url:
DOI: 10.1093/hmg/ddq174
PubMed: 20418484
PubMed Central: 2893806

Links to Exploration step

PMC:2893806

Le document en format XML

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<name sortKey="Dressler, Catherina" sort="Dressler, Catherina" uniqKey="Dressler C" first="Catherina" last="Dressler">Catherina Dressler</name>
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<addr-line>Vienna</addr-line>
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<name sortKey="Fink, Anneliese" sort="Fink, Anneliese" uniqKey="Fink A" first="Anneliese" last="Fink">Anneliese Fink</name>
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<addr-line>Vienna</addr-line>
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<name sortKey="Szabo, Csilla I" sort="Szabo, Csilla I" uniqKey="Szabo C" first="Csilla I." last="Szabo">Csilla I. Szabo</name>
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<addr-line>Prague</addr-line>
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<name sortKey="Foretova, Lenka" sort="Foretova, Lenka" uniqKey="Foretova L" first="Lenka" last="Foretova">Lenka Foretova</name>
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<name sortKey="Claes, Kathleen" sort="Claes, Kathleen" uniqKey="Claes K" first="Kathleen" last="Claes">Kathleen Claes</name>
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<addr-line>Center for Medical Genetics</addr-line>
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<addr-line>Ghent</addr-line>
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<name sortKey="Thomas, Gilles" sort="Thomas, Gilles" uniqKey="Thomas G" first="Gilles" last="Thomas">Gilles Thomas</name>
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<nlm:aff id="af21">
<addr-line>Division of Cancer Epidemiology and Genetics</addr-line>
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<institution>National Cancer Institute, National Institutes of Health</institution>
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<addr-line>Bethesda, MD</addr-line>
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<country>USA</country>
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<name sortKey="Hunter, David J" sort="Hunter, David J" uniqKey="Hunter D" first="David J." last="Hunter">David J. Hunter</name>
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<addr-line>Program in Molecular and Genetic Epidemiology</addr-line>
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<institution>Harvard School of Public Health</institution>
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<addr-line>Boston, MA</addr-line>
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<institution>Brigham and Women's Hospital and Harvard Medical School</institution>
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<addr-line>Boston, MA</addr-line>
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<name sortKey="Chanock, Stephen J" sort="Chanock, Stephen J" uniqKey="Chanock S" first="Stephen J." last="Chanock">Stephen J. Chanock</name>
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<nlm:aff id="af24">
<addr-line>Advanced Technology Center</addr-line>
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<institution>National Cancer Institute</institution>
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<addr-line>Gaithersburg, MD</addr-line>
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<country>USA</country>
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<name sortKey="Easton, Douglas F" sort="Easton, Douglas F" uniqKey="Easton D" first="Douglas F." last="Easton">Douglas F. Easton</name>
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<nlm:aff wicri:cut=" and" id="af3">
<addr-line>Department of Public Health and Primary Care, Cancer Research UK Genetic Epidemiology Unit</addr-line>
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<name sortKey="Antoniou, Antonis C" sort="Antoniou, Antonis C" uniqKey="Antoniou A" first="Antonis C." last="Antoniou">Antonis C. Antoniou</name>
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<nlm:aff wicri:cut=" and" id="af3">
<addr-line>Department of Public Health and Primary Care, Cancer Research UK Genetic Epidemiology Unit</addr-line>
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<name sortKey="Couch, Fergus J" sort="Couch, Fergus J" uniqKey="Couch F" first="Fergus J." last="Couch">Fergus J. Couch</name>
<affiliation>
<nlm:aff wicri:cut=" and" id="af1">
<addr-line>Department of Laboratory Medicine and Pathology</addr-line>
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<affiliation>
<nlm:aff id="af2">
<addr-line>Health Sciences Research</addr-line>
,
<institution>Mayo Clinic</institution>
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<addr-line>Rochester, MN</addr-line>
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<country>USA</country>
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<title xml:lang="en" level="a" type="main">Common variants associated with breast cancer in genome-wide association studies are modifiers of breast cancer risk in BRCA1 and BRCA2 mutation carriers</title>
<author>
<name sortKey="Wang, Xianshu" sort="Wang, Xianshu" uniqKey="Wang X" first="Xianshu" last="Wang">Xianshu Wang</name>
<affiliation>
<nlm:aff wicri:cut=" and" id="af1">
<addr-line>Department of Laboratory Medicine and Pathology</addr-line>
</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Pankratz, V Shane" sort="Pankratz, V Shane" uniqKey="Pankratz V" first="V. Shane" last="Pankratz">V. Shane Pankratz</name>
<affiliation>
<nlm:aff id="af2">
<addr-line>Health Sciences Research</addr-line>
,
<institution>Mayo Clinic</institution>
,
<addr-line>Rochester, MN</addr-line>
,
<country>USA</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Fredericksen, Zachary" sort="Fredericksen, Zachary" uniqKey="Fredericksen Z" first="Zachary" last="Fredericksen">Zachary Fredericksen</name>
<affiliation>
<nlm:aff id="af2">
<addr-line>Health Sciences Research</addr-line>
,
<institution>Mayo Clinic</institution>
,
<addr-line>Rochester, MN</addr-line>
,
<country>USA</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Tarrell, Robert" sort="Tarrell, Robert" uniqKey="Tarrell R" first="Robert" last="Tarrell">Robert Tarrell</name>
<affiliation>
<nlm:aff id="af2">
<addr-line>Health Sciences Research</addr-line>
,
<institution>Mayo Clinic</institution>
,
<addr-line>Rochester, MN</addr-line>
,
<country>USA</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Karaus, Mary" sort="Karaus, Mary" uniqKey="Karaus M" first="Mary" last="Karaus">Mary Karaus</name>
<affiliation>
<nlm:aff id="af2">
<addr-line>Health Sciences Research</addr-line>
,
<institution>Mayo Clinic</institution>
,
<addr-line>Rochester, MN</addr-line>
,
<country>USA</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Mcguffog, Lesley" sort="Mcguffog, Lesley" uniqKey="Mcguffog L" first="Lesley" last="Mcguffog">Lesley Mcguffog</name>
<affiliation>
<nlm:aff wicri:cut=" and" id="af3">
<addr-line>Department of Public Health and Primary Care, Cancer Research UK Genetic Epidemiology Unit</addr-line>
</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Pharaoh, Paul D P" sort="Pharaoh, Paul D P" uniqKey="Pharaoh P" first="Paul D. P." last="Pharaoh">Paul D. P. Pharaoh</name>
<affiliation>
<nlm:aff id="af4">
<addr-line>Department of Oncology</addr-line>
,
<institution>University of Cambridge</institution>
,
<addr-line>Cambridge</addr-line>
,
<country>UK</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Ponder, Bruce A J" sort="Ponder, Bruce A J" uniqKey="Ponder B" first="Bruce A. J." last="Ponder">Bruce A. J. Ponder</name>
<affiliation>
<nlm:aff id="af4">
<addr-line>Department of Oncology</addr-line>
,
<institution>University of Cambridge</institution>
,
<addr-line>Cambridge</addr-line>
,
<country>UK</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Dunning, Alison M" sort="Dunning, Alison M" uniqKey="Dunning A" first="Alison M." last="Dunning">Alison M. Dunning</name>
<affiliation>
<nlm:aff id="af4">
<addr-line>Department of Oncology</addr-line>
,
<institution>University of Cambridge</institution>
,
<addr-line>Cambridge</addr-line>
,
<country>UK</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Peock, Susan" sort="Peock, Susan" uniqKey="Peock S" first="Susan" last="Peock">Susan Peock</name>
<affiliation>
<nlm:aff wicri:cut=" and" id="af3">
<addr-line>Department of Public Health and Primary Care, Cancer Research UK Genetic Epidemiology Unit</addr-line>
</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Cook, Margaret" sort="Cook, Margaret" uniqKey="Cook M" first="Margaret" last="Cook">Margaret Cook</name>
<affiliation>
<nlm:aff wicri:cut=" and" id="af3">
<addr-line>Department of Public Health and Primary Care, Cancer Research UK Genetic Epidemiology Unit</addr-line>
</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Oliver, Clare" sort="Oliver, Clare" uniqKey="Oliver C" first="Clare" last="Oliver">Clare Oliver</name>
<affiliation>
<nlm:aff wicri:cut=" and" id="af3">
<addr-line>Department of Public Health and Primary Care, Cancer Research UK Genetic Epidemiology Unit</addr-line>
</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Frost, Debra" sort="Frost, Debra" uniqKey="Frost D" first="Debra" last="Frost">Debra Frost</name>
<affiliation>
<nlm:aff wicri:cut=" and" id="af3">
<addr-line>Department of Public Health and Primary Care, Cancer Research UK Genetic Epidemiology Unit</addr-line>
</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Sinilnikova, Olga M" sort="Sinilnikova, Olga M" uniqKey="Sinilnikova O" first="Olga M." last="Sinilnikova">Olga M. Sinilnikova</name>
<affiliation>
<nlm:aff id="af5">
<institution>Unité Mixte de Génétique Constitutionnelle des Cancers Fréquents, Hospices Civils de Lyon/Centre Léon Bérard</institution>
,
<addr-line>Lyon</addr-line>
,
<country>France</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Stoppa Lyonnet, Dominique" sort="Stoppa Lyonnet, Dominique" uniqKey="Stoppa Lyonnet D" first="Dominique" last="Stoppa-Lyonnet">Dominique Stoppa-Lyonnet</name>
<affiliation>
<nlm:aff id="af6">
<addr-line>INSERM U509, Service de Génétique Oncologique, Institut Curie</addr-line>
,
<institution>Université Paris-Descartes</institution>
,
<addr-line>Paris</addr-line>
,
<country>France</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Mazoyer, Sylvie" sort="Mazoyer, Sylvie" uniqKey="Mazoyer S" first="Sylvie" last="Mazoyer">Sylvie Mazoyer</name>
<affiliation>
<nlm:aff id="af7">
<addr-line>Equipe labellisée LIGUE 2008, UMR5201 CNRS</addr-line>
,
<institution>Centre Léon Bérard, Université de Lyon</institution>
,
<addr-line>Lyon</addr-line>
,
<country>France</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Houdayer, Claude" sort="Houdayer, Claude" uniqKey="Houdayer C" first="Claude" last="Houdayer">Claude Houdayer</name>
<affiliation>
<nlm:aff id="af6">
<addr-line>INSERM U509, Service de Génétique Oncologique, Institut Curie</addr-line>
,
<institution>Université Paris-Descartes</institution>
,
<addr-line>Paris</addr-line>
,
<country>France</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Hogervorst, Frans B L" sort="Hogervorst, Frans B L" uniqKey="Hogervorst F" first="Frans B. L." last="Hogervorst">Frans B. L. Hogervorst</name>
<affiliation>
<nlm:aff id="af8">
<addr-line>Department of Pathology</addr-line>
,
<institution>Family Cancer Clinic, The Netherlands Cancer Institute</institution>
,
<addr-line>Amsterdam</addr-line>
,
<country>The Netherlands</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Hooning, Maartje J" sort="Hooning, Maartje J" uniqKey="Hooning M" first="Maartje J." last="Hooning">Maartje J. Hooning</name>
<affiliation>
<nlm:aff id="af9">
<addr-line>Department of Medical Oncology</addr-line>
,
<institution>Rotterdam Family Cancer Clinic</institution>
,
<addr-line>Erasmus</addr-line>
,
<country>The Netherlands</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Ligtenberg, Marjolijn J" sort="Ligtenberg, Marjolijn J" uniqKey="Ligtenberg M" first="Marjolijn J." last="Ligtenberg">Marjolijn J. Ligtenberg</name>
<affiliation>
<nlm:aff id="af10">
<addr-line>Department of Human Genetics</addr-line>
,
<institution>Radboud University Medical Center</institution>
,
<addr-line>Nijmegen</addr-line>
,
<country>The Netherlands</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Spurdle, Amanda" sort="Spurdle, Amanda" uniqKey="Spurdle A" first="Amanda" last="Spurdle">Amanda Spurdle</name>
<affiliation>
<nlm:aff id="af11">
<institution>Queensland Institute of Medical Research</institution>
,
<addr-line>Brisbane, QLD 4029</addr-line>
,
<country>Australia</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Chenevix Trench, Georgia" sort="Chenevix Trench, Georgia" uniqKey="Chenevix Trench G" first="Georgia" last="Chenevix-Trench">Georgia Chenevix-Trench</name>
<affiliation>
<nlm:aff id="af11">
<institution>Queensland Institute of Medical Research</institution>
,
<addr-line>Brisbane, QLD 4029</addr-line>
,
<country>Australia</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Schmutzler, Rita K" sort="Schmutzler, Rita K" uniqKey="Schmutzler R" first="Rita K." last="Schmutzler">Rita K. Schmutzler</name>
<affiliation>
<nlm:aff id="af13">
<addr-line>Center of Familial Breast and Ovarian Cancer</addr-line>
,
<institution>University Hospital of Cologne</institution>
,
<addr-line>Cologne</addr-line>
,
<country>Germany</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Wappenschmidt, Barbara" sort="Wappenschmidt, Barbara" uniqKey="Wappenschmidt B" first="Barbara" last="Wappenschmidt">Barbara Wappenschmidt</name>
<affiliation>
<nlm:aff id="af13">
<addr-line>Center of Familial Breast and Ovarian Cancer</addr-line>
,
<institution>University Hospital of Cologne</institution>
,
<addr-line>Cologne</addr-line>
,
<country>Germany</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Engel, Christoph" sort="Engel, Christoph" uniqKey="Engel C" first="Christoph" last="Engel">Christoph Engel</name>
<affiliation>
<nlm:aff id="af14">
<addr-line>Institute of Medical Informatics, Statistics and Epidemiology</addr-line>
,
<institution>University of Leipzig</institution>
,
<addr-line>Leipzig</addr-line>
,
<country>Germany</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Meindl, Alfons" sort="Meindl, Alfons" uniqKey="Meindl A" first="Alfons" last="Meindl">Alfons Meindl</name>
<affiliation>
<nlm:aff id="af15">
<addr-line>Department of Obstetrics and Gynaecology, Klinikum rechts der Isar</addr-line>
,
<institution>Technical University</institution>
,
<addr-line>Munich</addr-line>
,
<country>Germany</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Domchek, Susan M" sort="Domchek, Susan M" uniqKey="Domchek S" first="Susan M." last="Domchek">Susan M. Domchek</name>
<affiliation>
<nlm:aff id="af16">
<institution>University of Pennsylvania</institution>
,
<addr-line>Philadelphia, PA</addr-line>
,
<country>USA</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Nathanson, Katherine L" sort="Nathanson, Katherine L" uniqKey="Nathanson K" first="Katherine L." last="Nathanson">Katherine L. Nathanson</name>
<affiliation>
<nlm:aff id="af16">
<institution>University of Pennsylvania</institution>
,
<addr-line>Philadelphia, PA</addr-line>
,
<country>USA</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Rebbeck, Timothy R" sort="Rebbeck, Timothy R" uniqKey="Rebbeck T" first="Timothy R." last="Rebbeck">Timothy R. Rebbeck</name>
<affiliation>
<nlm:aff id="af16">
<institution>University of Pennsylvania</institution>
,
<addr-line>Philadelphia, PA</addr-line>
,
<country>USA</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Singer, Christian F" sort="Singer, Christian F" uniqKey="Singer C" first="Christian F." last="Singer">Christian F. Singer</name>
<affiliation>
<nlm:aff id="af17">
<institution>Medical University of Vienna</institution>
,
<addr-line>Vienna</addr-line>
,
<country>Austria</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Gschwantler Kaulich, Daphne" sort="Gschwantler Kaulich, Daphne" uniqKey="Gschwantler Kaulich D" first="Daphne" last="Gschwantler-Kaulich">Daphne Gschwantler-Kaulich</name>
<affiliation>
<nlm:aff id="af17">
<institution>Medical University of Vienna</institution>
,
<addr-line>Vienna</addr-line>
,
<country>Austria</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Dressler, Catherina" sort="Dressler, Catherina" uniqKey="Dressler C" first="Catherina" last="Dressler">Catherina Dressler</name>
<affiliation>
<nlm:aff id="af17">
<institution>Medical University of Vienna</institution>
,
<addr-line>Vienna</addr-line>
,
<country>Austria</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Fink, Anneliese" sort="Fink, Anneliese" uniqKey="Fink A" first="Anneliese" last="Fink">Anneliese Fink</name>
<affiliation>
<nlm:aff id="af17">
<institution>Medical University of Vienna</institution>
,
<addr-line>Vienna</addr-line>
,
<country>Austria</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Szabo, Csilla I" sort="Szabo, Csilla I" uniqKey="Szabo C" first="Csilla I." last="Szabo">Csilla I. Szabo</name>
<affiliation>
<nlm:aff wicri:cut=" and" id="af1">
<addr-line>Department of Laboratory Medicine and Pathology</addr-line>
</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Zikan, Michal" sort="Zikan, Michal" uniqKey="Zikan M" first="Michal" last="Zikan">Michal Zikan</name>
<affiliation>
<nlm:aff id="af18">
<addr-line>Department of Biochemistry and Experimental Oncology, First Faculty of Medicine</addr-line>
,
<institution>Charles University</institution>
,
<addr-line>Prague</addr-line>
,
<country>Czech Republic</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Foretova, Lenka" sort="Foretova, Lenka" uniqKey="Foretova L" first="Lenka" last="Foretova">Lenka Foretova</name>
<affiliation>
<nlm:aff id="af19">
<addr-line>Department of Cancer Epidemiology and Genetics</addr-line>
,
<institution>Masaryk Memorial Cancer Institute</institution>
,
<addr-line>Brno</addr-line>
,
<country>Czech Republic</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Claes, Kathleen" sort="Claes, Kathleen" uniqKey="Claes K" first="Kathleen" last="Claes">Kathleen Claes</name>
<affiliation>
<nlm:aff id="af20">
<addr-line>Center for Medical Genetics</addr-line>
,
<institution>Ghent University Hospital</institution>
,
<addr-line>Ghent</addr-line>
,
<country>Belgium</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Thomas, Gilles" sort="Thomas, Gilles" uniqKey="Thomas G" first="Gilles" last="Thomas">Gilles Thomas</name>
<affiliation>
<nlm:aff id="af21">
<addr-line>Division of Cancer Epidemiology and Genetics</addr-line>
,
<institution>National Cancer Institute, National Institutes of Health</institution>
,
<addr-line>Bethesda, MD</addr-line>
,
<country>USA</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Hoover, Robert N" sort="Hoover, Robert N" uniqKey="Hoover R" first="Robert N." last="Hoover">Robert N. Hoover</name>
<affiliation>
<nlm:aff id="af21">
<addr-line>Division of Cancer Epidemiology and Genetics</addr-line>
,
<institution>National Cancer Institute, National Institutes of Health</institution>
,
<addr-line>Bethesda, MD</addr-line>
,
<country>USA</country>
,</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Hunter, David J" sort="Hunter, David J" uniqKey="Hunter D" first="David J." last="Hunter">David J. Hunter</name>
<affiliation>
<nlm:aff id="af22">
<addr-line>Program in Molecular and Genetic Epidemiology</addr-line>
,
<institution>Harvard School of Public Health</institution>
,
<addr-line>Boston, MA</addr-line>
,
<country>USA</country>
,</nlm:aff>
</affiliation>
<affiliation>
<nlm:aff wicri:cut=" and" id="af23">
<institution>Brigham and Women's Hospital and Harvard Medical School</institution>
,
<addr-line>Boston, MA</addr-line>
,
<country>USA</country>
</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Chanock, Stephen J" sort="Chanock, Stephen J" uniqKey="Chanock S" first="Stephen J." last="Chanock">Stephen J. Chanock</name>
<affiliation>
<nlm:aff id="af24">
<addr-line>Advanced Technology Center</addr-line>
,
<institution>National Cancer Institute</institution>
,
<addr-line>Gaithersburg, MD</addr-line>
,
<country>USA</country>
</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Easton, Douglas F" sort="Easton, Douglas F" uniqKey="Easton D" first="Douglas F." last="Easton">Douglas F. Easton</name>
<affiliation>
<nlm:aff wicri:cut=" and" id="af3">
<addr-line>Department of Public Health and Primary Care, Cancer Research UK Genetic Epidemiology Unit</addr-line>
</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Antoniou, Antonis C" sort="Antoniou, Antonis C" uniqKey="Antoniou A" first="Antonis C." last="Antoniou">Antonis C. Antoniou</name>
<affiliation>
<nlm:aff wicri:cut=" and" id="af3">
<addr-line>Department of Public Health and Primary Care, Cancer Research UK Genetic Epidemiology Unit</addr-line>
</nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Couch, Fergus J" sort="Couch, Fergus J" uniqKey="Couch F" first="Fergus J." last="Couch">Fergus J. Couch</name>
<affiliation>
<nlm:aff wicri:cut=" and" id="af1">
<addr-line>Department of Laboratory Medicine and Pathology</addr-line>
</nlm:aff>
</affiliation>
<affiliation>
<nlm:aff id="af2">
<addr-line>Health Sciences Research</addr-line>
,
<institution>Mayo Clinic</institution>
,
<addr-line>Rochester, MN</addr-line>
,
<country>USA</country>
,</nlm:aff>
</affiliation>
</author>
</analytic>
<series>
<title level="j">Human Molecular Genetics</title>
<idno type="ISSN">0964-6906</idno>
<idno type="eISSN">1460-2083</idno>
<imprint>
<date when="2010">2010</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
</fileDesc>
<profileDesc>
<textClass></textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">
<p>Recent studies have identified single nucleotide polymorphisms (SNPs) that significantly modify breast cancer risk in
<italic>BRCA1</italic>
and
<italic>BRCA2</italic>
mutation carriers. Since these risk modifiers were originally identified as genetic risk factors for breast cancer in genome-wide association studies (GWASs), additional risk modifiers for
<italic>BRCA1</italic>
and
<italic>BRCA2</italic>
may be identified from promising signals discovered in breast cancer GWAS. A total of 350 SNPs identified as candidate breast cancer risk factors (
<italic>P</italic>
< 1 × 10
<sup>−3</sup>
) in two breast cancer GWAS studies were genotyped in 3451
<italic>BRCA1</italic>
and 2006
<italic>BRCA2</italic>
mutation carriers from nine centers. Associations with breast cancer risk were assessed using Cox models weighted for penetrance. Eight SNPs in
<italic>BRCA1</italic>
carriers and 12 SNPs in
<italic>BRCA2</italic>
carriers, representing an enrichment over the number expected, were significantly associated with breast cancer risk (
<italic>P</italic>
<sub>trend</sub>
< 0.01). The minor alleles of rs6138178 in
<italic>SNRPB</italic>
and rs6602595 in
<italic>CAMK1D</italic>
displayed the strongest associations in
<italic>BRCA1</italic>
carriers (HR = 0.78, 95% CI: 0.69–0.90,
<italic>P</italic>
<sub>trend</sub>
= 3.6 × 10
<sup>−4</sup>
and HR = 1.25, 95% CI: 1.10–1.41,
<italic>P</italic>
<sub>trend</sub>
= 4.2 × 10
<sup>−4</sup>
), whereas rs9393597 in
<italic>LOC134997</italic>
and rs12652447 in
<italic>FBXL7</italic>
showed the strongest associations in
<italic>BRCA2</italic>
carriers (HR = 1.55, 95% CI: 1.25–1.92,
<italic>P</italic>
<sub>trend</sub>
= 6 × 10
<sup>−5</sup>
and HR = 1.37, 95% CI: 1.16–1.62,
<italic>P</italic>
<sub>trend</sub>
= 1.7 × 10
<sup>−4</sup>
). The magnitude and direction of the associations were consistent with the original GWAS. In subsequent risk assessment studies, the loci appeared to interact multiplicatively for breast cancer risk in
<italic>BRCA1</italic>
and
<italic>BRCA2</italic>
carriers. Promising candidate SNPs from GWAS were identified as modifiers of breast cancer risk in
<italic>BRCA1</italic>
and
<italic>BRCA2</italic>
carriers. Upon further validation, these SNPs together with other genetic and environmental factors may improve breast cancer risk assessment in these populations.</p>
</div>
</front>
</TEI>
<pmc article-type="research-article">
<pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front>
<journal-meta>
<journal-id journal-id-type="nlm-ta">Hum Mol Genet</journal-id>
<journal-id journal-id-type="publisher-id">hmg</journal-id>
<journal-id journal-id-type="hwp">hmg</journal-id>
<journal-title-group>
<journal-title>Human Molecular Genetics</journal-title>
</journal-title-group>
<issn pub-type="ppub">0964-6906</issn>
<issn pub-type="epub">1460-2083</issn>
<publisher>
<publisher-name>Oxford University Press</publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="pmid">20418484</article-id>
<article-id pub-id-type="pmc">2893806</article-id>
<article-id pub-id-type="doi">10.1093/hmg/ddq174</article-id>
<article-id pub-id-type="publisher-id">ddq174</article-id>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Association Studies Articles</subject>
</subj-group>
</article-categories>
<title-group>
<article-title>Common variants associated with breast cancer in genome-wide association studies are modifiers of breast cancer risk in BRCA1 and BRCA2 mutation carriers</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname>Wang</surname>
<given-names>Xianshu</given-names>
</name>
<xref ref-type="aff" rid="af1">1</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Pankratz</surname>
<given-names>V. Shane</given-names>
</name>
<xref ref-type="aff" rid="af2">2</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Fredericksen</surname>
<given-names>Zachary</given-names>
</name>
<xref ref-type="aff" rid="af2">2</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Tarrell</surname>
<given-names>Robert</given-names>
</name>
<xref ref-type="aff" rid="af2">2</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Karaus</surname>
<given-names>Mary</given-names>
</name>
<xref ref-type="aff" rid="af2">2</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>McGuffog</surname>
<given-names>Lesley</given-names>
</name>
<xref ref-type="aff" rid="af3">3</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Pharaoh</surname>
<given-names>Paul D.P.</given-names>
</name>
<xref ref-type="aff" rid="af4">4</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Ponder</surname>
<given-names>Bruce A.J.</given-names>
</name>
<xref ref-type="aff" rid="af4">4</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Dunning</surname>
<given-names>Alison M.</given-names>
</name>
<xref ref-type="aff" rid="af4">4</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Peock</surname>
<given-names>Susan</given-names>
</name>
<xref ref-type="aff" rid="af3">3</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Cook</surname>
<given-names>Margaret</given-names>
</name>
<xref ref-type="aff" rid="af3">3</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Oliver</surname>
<given-names>Clare</given-names>
</name>
<xref ref-type="aff" rid="af3">3</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Frost</surname>
<given-names>Debra</given-names>
</name>
<xref ref-type="aff" rid="af3">3</xref>
</contrib>
<contrib contrib-type="author">
<collab>EMBRACE</collab>
<xref ref-type="aff" rid="af3">3</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Sinilnikova</surname>
<given-names>Olga M.</given-names>
</name>
<xref ref-type="aff" rid="af5">5</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Stoppa-Lyonnet</surname>
<given-names>Dominique</given-names>
</name>
<xref ref-type="aff" rid="af6">6</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Mazoyer</surname>
<given-names>Sylvie</given-names>
</name>
<xref ref-type="aff" rid="af7">7</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Houdayer</surname>
<given-names>Claude</given-names>
</name>
<xref ref-type="aff" rid="af6">6</xref>
</contrib>
<contrib contrib-type="author">
<collab>GEMO</collab>
<xref ref-type="aff" rid="af5">5</xref>
<xref ref-type="aff" rid="af6">6</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Hogervorst</surname>
<given-names>Frans B.L.</given-names>
</name>
<xref ref-type="aff" rid="af8">8</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Hooning</surname>
<given-names>Maartje J.</given-names>
</name>
<xref ref-type="aff" rid="af9">9</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Ligtenberg</surname>
<given-names>Marjolijn J.</given-names>
</name>
<xref ref-type="aff" rid="af10">10</xref>
</contrib>
<contrib contrib-type="author">
<collab>HEBON</collab>
<xref ref-type="aff" rid="af8">8</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Spurdle</surname>
<given-names>Amanda</given-names>
</name>
<xref ref-type="aff" rid="af11">11</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Chenevix-Trench</surname>
<given-names>Georgia</given-names>
</name>
<xref ref-type="aff" rid="af11">11</xref>
</contrib>
<contrib contrib-type="author">
<collab>kConFab</collab>
<xref ref-type="aff" rid="af12">12</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Schmutzler</surname>
<given-names>Rita K.</given-names>
</name>
<xref ref-type="aff" rid="af13">13</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Wappenschmidt</surname>
<given-names>Barbara</given-names>
</name>
<xref ref-type="aff" rid="af13">13</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Engel</surname>
<given-names>Christoph</given-names>
</name>
<xref ref-type="aff" rid="af14">14</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Meindl</surname>
<given-names>Alfons</given-names>
</name>
<xref ref-type="aff" rid="af15">15</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Domchek</surname>
<given-names>Susan M.</given-names>
</name>
<xref ref-type="aff" rid="af16">16</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Nathanson</surname>
<given-names>Katherine L.</given-names>
</name>
<xref ref-type="aff" rid="af16">16</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Rebbeck</surname>
<given-names>Timothy R.</given-names>
</name>
<xref ref-type="aff" rid="af16">16</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Singer</surname>
<given-names>Christian F.</given-names>
</name>
<xref ref-type="aff" rid="af17">17</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Gschwantler-Kaulich</surname>
<given-names>Daphne</given-names>
</name>
<xref ref-type="aff" rid="af17">17</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Dressler</surname>
<given-names>Catherina</given-names>
</name>
<xref ref-type="aff" rid="af17">17</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Fink</surname>
<given-names>Anneliese</given-names>
</name>
<xref ref-type="aff" rid="af17">17</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Szabo</surname>
<given-names>Csilla I.</given-names>
</name>
<xref ref-type="aff" rid="af1">1</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Zikan</surname>
<given-names>Michal</given-names>
</name>
<xref ref-type="aff" rid="af18">18</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Foretova</surname>
<given-names>Lenka</given-names>
</name>
<xref ref-type="aff" rid="af19">19</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Claes</surname>
<given-names>Kathleen</given-names>
</name>
<xref ref-type="aff" rid="af20">20</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Thomas</surname>
<given-names>Gilles</given-names>
</name>
<xref ref-type="aff" rid="af21">21</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Hoover</surname>
<given-names>Robert N.</given-names>
</name>
<xref ref-type="aff" rid="af21">21</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Hunter</surname>
<given-names>David J.</given-names>
</name>
<xref ref-type="aff" rid="af22">22</xref>
<xref ref-type="aff" rid="af23">23</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Chanock</surname>
<given-names>Stephen J.</given-names>
</name>
<xref ref-type="aff" rid="af24">24</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Easton</surname>
<given-names>Douglas F.</given-names>
</name>
<xref ref-type="aff" rid="af3">3</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Antoniou</surname>
<given-names>Antonis C.</given-names>
</name>
<xref ref-type="aff" rid="af3">3</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Couch</surname>
<given-names>Fergus J.</given-names>
</name>
<xref ref-type="aff" rid="af1">1</xref>
<xref ref-type="aff" rid="af2">2</xref>
<xref ref-type="corresp" rid="cor1">*</xref>
</contrib>
</contrib-group>
<aff id="af1">
<label>1</label>
<addr-line>Department of Laboratory Medicine and Pathology</addr-line>
and</aff>
<aff id="af2">
<label>2</label>
<addr-line>Health Sciences Research</addr-line>
,
<institution>Mayo Clinic</institution>
,
<addr-line>Rochester, MN</addr-line>
,
<country>USA</country>
,</aff>
<aff id="af3">
<label>3</label>
<addr-line>Department of Public Health and Primary Care, Cancer Research UK Genetic Epidemiology Unit</addr-line>
and</aff>
<aff id="af4">
<label>4</label>
<addr-line>Department of Oncology</addr-line>
,
<institution>University of Cambridge</institution>
,
<addr-line>Cambridge</addr-line>
,
<country>UK</country>
,</aff>
<aff id="af5">
<label>5</label>
<institution>Unité Mixte de Génétique Constitutionnelle des Cancers Fréquents, Hospices Civils de Lyon/Centre Léon Bérard</institution>
,
<addr-line>Lyon</addr-line>
,
<country>France</country>
,</aff>
<aff id="af6">
<label>6</label>
<addr-line>INSERM U509, Service de Génétique Oncologique, Institut Curie</addr-line>
,
<institution>Université Paris-Descartes</institution>
,
<addr-line>Paris</addr-line>
,
<country>France</country>
,</aff>
<aff id="af7">
<label>7</label>
<addr-line>Equipe labellisée LIGUE 2008, UMR5201 CNRS</addr-line>
,
<institution>Centre Léon Bérard, Université de Lyon</institution>
,
<addr-line>Lyon</addr-line>
,
<country>France</country>
,</aff>
<aff id="af8">
<label>8</label>
<addr-line>Department of Pathology</addr-line>
,
<institution>Family Cancer Clinic, The Netherlands Cancer Institute</institution>
,
<addr-line>Amsterdam</addr-line>
,
<country>The Netherlands</country>
,</aff>
<aff id="af9">
<label>9</label>
<addr-line>Department of Medical Oncology</addr-line>
,
<institution>Rotterdam Family Cancer Clinic</institution>
,
<addr-line>Erasmus</addr-line>
,
<country>The Netherlands</country>
,</aff>
<aff id="af10">
<label>10</label>
<addr-line>Department of Human Genetics</addr-line>
,
<institution>Radboud University Medical Center</institution>
,
<addr-line>Nijmegen</addr-line>
,
<country>The Netherlands</country>
,</aff>
<aff id="af11">
<label>11</label>
<institution>Queensland Institute of Medical Research</institution>
,
<addr-line>Brisbane, QLD 4029</addr-line>
,
<country>Australia</country>
,</aff>
<aff id="af12">
<label>12</label>
<addr-line>kConFab (Kathleen Cunningham Foundation Consortium for Research into Familial Breast Cancer)</addr-line>
,
<institution>Peter MacCallum Cancer Institute</institution>
,
<addr-line>Melbourne, VIC 3002</addr-line>
,
<country>Australia</country>
,</aff>
<aff id="af13">
<label>13</label>
<addr-line>Center of Familial Breast and Ovarian Cancer</addr-line>
,
<institution>University Hospital of Cologne</institution>
,
<addr-line>Cologne</addr-line>
,
<country>Germany</country>
,</aff>
<aff id="af14">
<label>14</label>
<addr-line>Institute of Medical Informatics, Statistics and Epidemiology</addr-line>
,
<institution>University of Leipzig</institution>
,
<addr-line>Leipzig</addr-line>
,
<country>Germany</country>
,</aff>
<aff id="af15">
<label>15</label>
<addr-line>Department of Obstetrics and Gynaecology, Klinikum rechts der Isar</addr-line>
,
<institution>Technical University</institution>
,
<addr-line>Munich</addr-line>
,
<country>Germany</country>
,</aff>
<aff id="af16">
<label>16</label>
<institution>University of Pennsylvania</institution>
,
<addr-line>Philadelphia, PA</addr-line>
,
<country>USA</country>
,</aff>
<aff id="af17">
<label>17</label>
<institution>Medical University of Vienna</institution>
,
<addr-line>Vienna</addr-line>
,
<country>Austria</country>
,</aff>
<aff id="af18">
<label>18</label>
<addr-line>Department of Biochemistry and Experimental Oncology, First Faculty of Medicine</addr-line>
,
<institution>Charles University</institution>
,
<addr-line>Prague</addr-line>
,
<country>Czech Republic</country>
,</aff>
<aff id="af19">
<label>19</label>
<addr-line>Department of Cancer Epidemiology and Genetics</addr-line>
,
<institution>Masaryk Memorial Cancer Institute</institution>
,
<addr-line>Brno</addr-line>
,
<country>Czech Republic</country>
,</aff>
<aff id="af20">
<label>20</label>
<addr-line>Center for Medical Genetics</addr-line>
,
<institution>Ghent University Hospital</institution>
,
<addr-line>Ghent</addr-line>
,
<country>Belgium</country>
,</aff>
<aff id="af21">
<label>21</label>
<addr-line>Division of Cancer Epidemiology and Genetics</addr-line>
,
<institution>National Cancer Institute, National Institutes of Health</institution>
,
<addr-line>Bethesda, MD</addr-line>
,
<country>USA</country>
,</aff>
<aff id="af22">
<label>22</label>
<addr-line>Program in Molecular and Genetic Epidemiology</addr-line>
,
<institution>Harvard School of Public Health</institution>
,
<addr-line>Boston, MA</addr-line>
,
<country>USA</country>
,</aff>
<aff id="af23">
<label>23</label>
<institution>Brigham and Women's Hospital and Harvard Medical School</institution>
,
<addr-line>Boston, MA</addr-line>
,
<country>USA</country>
and</aff>
<aff id="af24">
<label>24</label>
<addr-line>Advanced Technology Center</addr-line>
,
<institution>National Cancer Institute</institution>
,
<addr-line>Gaithersburg, MD</addr-line>
,
<country>USA</country>
</aff>
<author-notes>
<corresp id="cor1">
<label>*</label>
To whom correspondence should be addressed at:
<addr-line>Department of Laboratory Medicine and Pathology</addr-line>
,
<institution>Mayo Clinic College of Medicine</institution>
,
<addr-line>200 First Street SW, Rochester, MN 55905</addr-line>
,
<country>USA</country>
. Tel:
<phone>+1 5072843623</phone>
; Fax:
<fax>+1 5075381937</fax>
; Email:
<email>couch.fergus@mayo.edu</email>
</corresp>
</author-notes>
<pub-date pub-type="ppub">
<day>15</day>
<month>7</month>
<year>2010</year>
</pub-date>
<pub-date pub-type="epub">
<day>23</day>
<month>4</month>
<year>2010</year>
</pub-date>
<pub-date pub-type="pmc-release">
<day>15</day>
<month>7</month>
<year>2011</year>
</pub-date>
<pmc-comment> PMC Release delay is 12 months and 0 days and was based on the . </pmc-comment>
<volume>19</volume>
<issue>14</issue>
<fpage>2886</fpage>
<lpage>2897</lpage>
<history>
<date date-type="received">
<day>8</day>
<month>2</month>
<year>2010</year>
</date>
<date date-type="accepted">
<day>21</day>
<month>4</month>
<year>2010</year>
</date>
</history>
<permissions>
<copyright-statement>© The Author 2010. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org</copyright-statement>
<copyright-year>2010</copyright-year>
</permissions>
<abstract>
<p>Recent studies have identified single nucleotide polymorphisms (SNPs) that significantly modify breast cancer risk in
<italic>BRCA1</italic>
and
<italic>BRCA2</italic>
mutation carriers. Since these risk modifiers were originally identified as genetic risk factors for breast cancer in genome-wide association studies (GWASs), additional risk modifiers for
<italic>BRCA1</italic>
and
<italic>BRCA2</italic>
may be identified from promising signals discovered in breast cancer GWAS. A total of 350 SNPs identified as candidate breast cancer risk factors (
<italic>P</italic>
< 1 × 10
<sup>−3</sup>
) in two breast cancer GWAS studies were genotyped in 3451
<italic>BRCA1</italic>
and 2006
<italic>BRCA2</italic>
mutation carriers from nine centers. Associations with breast cancer risk were assessed using Cox models weighted for penetrance. Eight SNPs in
<italic>BRCA1</italic>
carriers and 12 SNPs in
<italic>BRCA2</italic>
carriers, representing an enrichment over the number expected, were significantly associated with breast cancer risk (
<italic>P</italic>
<sub>trend</sub>
< 0.01). The minor alleles of rs6138178 in
<italic>SNRPB</italic>
and rs6602595 in
<italic>CAMK1D</italic>
displayed the strongest associations in
<italic>BRCA1</italic>
carriers (HR = 0.78, 95% CI: 0.69–0.90,
<italic>P</italic>
<sub>trend</sub>
= 3.6 × 10
<sup>−4</sup>
and HR = 1.25, 95% CI: 1.10–1.41,
<italic>P</italic>
<sub>trend</sub>
= 4.2 × 10
<sup>−4</sup>
), whereas rs9393597 in
<italic>LOC134997</italic>
and rs12652447 in
<italic>FBXL7</italic>
showed the strongest associations in
<italic>BRCA2</italic>
carriers (HR = 1.55, 95% CI: 1.25–1.92,
<italic>P</italic>
<sub>trend</sub>
= 6 × 10
<sup>−5</sup>
and HR = 1.37, 95% CI: 1.16–1.62,
<italic>P</italic>
<sub>trend</sub>
= 1.7 × 10
<sup>−4</sup>
). The magnitude and direction of the associations were consistent with the original GWAS. In subsequent risk assessment studies, the loci appeared to interact multiplicatively for breast cancer risk in
<italic>BRCA1</italic>
and
<italic>BRCA2</italic>
carriers. Promising candidate SNPs from GWAS were identified as modifiers of breast cancer risk in
<italic>BRCA1</italic>
and
<italic>BRCA2</italic>
carriers. Upon further validation, these SNPs together with other genetic and environmental factors may improve breast cancer risk assessment in these populations.</p>
</abstract>
</article-meta>
</front>
</pmc>
</record>

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