Citations 5
Genetic overlap between endometriosis and endometrial cancer: evidence from cross‐disease genetic correlation and GWAS meta‐analyses
Painter, Jodie N. , O’Mara, Tracy A. , Morris, Andrew P. , Cheng, Timothy, Gorman, Maggie, Martin, Lynn , Hodson, Shirley, Henders, Anjali K. , McEvoy, Mark , Holliday, Elizabeth , Scott, Rodney J. , Webb, Penelope M. , Fasching, Peter A. , Beckmann, Matthias W. , Ekici, Arif B. , Hein, Alexander , Rübner, Matthias, Dörk, Thilo , Hillemanns, Peter , Runnebaum, Ingo B. , Lambrechts, Diether , Annibali, Daniela , Depreeuw, Jeroen, Goode, Ellen L. , Cunningham, Julie M. , Dowdy, Sean C. , Trovik, Jone , Høivik, Erling A. , Werner, Henrica M.J., Krakstad, Camilla , Ashton, Katie A. , Otton, Geoffrey, Proietto, Tony, Tham, Emma , Mints, Miriam, Healey, Catherine S., Shah, Mitul , Bolla, Manjeet K. , Michailidou, Kyriaki , Wang, Qin , Hopper, John L. , Peto, Julian , Swerdlow, Anthony J. , Burwinkel, Barbara , Brenner, Hermann , Meindl, Alfons, Brauch, Hiltrud , Lindblom, Annika , Chang‐Claude, Jenny , Couch, Fergus J. , Kristensen, Vessela N. , Zondervan, Krina T. , Nyholt, Dale R. , MacGregor, Stuart , Tomlinson, Ian , Easton, Douglas F. , Thompson, Deborah J. , Lambrechts, Diether , Fasching, Peter A , Dörk, Thilo , Lambrechts, Diether , Goode, Ellen L , Webb, Penelope M , Hein, Alexander , Hillemanns, Peter , Swerdlow, Anthony J , O'Mara, Tracy A , Lambrechts, Diether , Brenner, Hermann , Ekici, Arif B , Michailidou, Kyriaki , MacGregor, Stuart , Jones, Angela , Martin, Nicholas G. , Gordon, Scott D. , Attia, John , Hall, Per N , Czene, Kamila , Dürst, Matthias , Amant, Frédéric , Vanderstichele, Adriaan , Winham, Stacey J. , Mints, Miriam , Ahmed, Shahana , Pharoah, Paul D.P. , Dunning, Alison M. , Dennis, Joe , Tyrer, Jonathan P. , Meindl, Alfons, Couch, Fergus J. , Giles, Graham G. , Cox, Angela , Montgomery, Grant W. , Spurdle, Amanda B. , Brauch, Hiltrud , Lindblom, Annika
Cancer Medicine | April 2, 2018 | Volume: 7 | Issue: 5 | Pages: 1978-1987
AbstractEpidemiological, biological, and molecular data suggest links between endometriosis and endometrial cancer, with recent epidemiological studies providing evidence for an association between a previous diagnosis of endometriosis and risk of endometrial cancer. We used genetic data as an alternative approach to investigate shared biological etiology of these two diseases. Genetic correlation analysis of summary level statistics from genomewide association studies (GWAS) using LD Score regression revealed moderate but significant genetic correlation (rg = 0.23, P = 9.3 × 10−3), and SNP effect concordance analysis provided evidence for significant SNP pleiotropy (P = 6.0 × 10−3) and concordance in effect direction (P = 2.0 × 10−3) between the two diseases. Cross‐disease GWAS meta‐analysis highlighted 13 distinct loci associated at P ≤ 10−5 with both endometriosis and endometrial cancer, with one locus (SNP rs2475335) located within PTPRD associated at a genomewide significant level (P = 4.9 × 10−8, OR = 1.11, 95% CI = 1.07–1.15). PTPRD acts in the STAT3 pathway, which has been implicated in both endometriosis and endometrial cancer. This study demonstrates the value of cross‐disease genetic analysis to support epidemiological observations and to identify biological pathways of relevance to multiple diseases.
Genetic Risk Score Mendelian Randomization Shows that Obesity Measured as Body Mass Index, but not Waist:Hip Ratio, Is Causal for Endometrial Cancer
Painter, Jodie N. , O’Mara, Tracy A. , Marquart, Louise , Webb, Penelope M. , Medland, Sarah E. , Cheng, Timothy, Holliday, Elizabeth , McEvoy, Mark , Scott, Rodney J. , Healey, Catherine S., Shah, Mitul , Gorman, Maggie, Martin, Lynn , Hodgson, Shirley V. , Beckmann, Matthias W. , Ekici, Arif B. , Fasching, Peter A. , Hein, Alexander , Rübner, Matthias, Darabi, Hatef, Li, Jingmei , Dörk, Thilo , Hillemanns, Peter , Runnebaum, Ingo B. , Annibali, Daniela , Depreeuw, Jeroen, Lambrechts, Diether , Neven, Patrick , Cunningham, Julie M. , Dowdy, Sean C. , Goode, Ellen L. , Winham, Stacey J. , Njølstad, Tormund S. , Salvesen, Helga B., Trovik, Jone , Werner, Henrica M.J., Ashton, Katie A. , Otton, Geoffrey, Proietto, Anthony , Mints, Miriam, Tham, Emma , Bolla, Manjeet K. , Michailidou, Kyriaki , Wang, Qin , Hopper, John L. , Peto, Julian , Swerdlow, Anthony J. , Burwinkel, Barbara , Brenner, Hermann , Meindl, Alfons, Brauch, Hiltrud , Lindblom, Annika , Chang‐Claude, Jenny , Couch, Fergus J. , Kristensen, Vessela N. , Tomlinson, Ian M., Dunning, Alison M. , Easton, Douglas F. , Thompson, Deborah J. , Lambrechts, Diether , Attia, John , Dennis, Joe , Ahmed, Shahana , Czene, Kamila , Hall, Per N , Dürst, Matthias , Amant, Frédéric , Fridley, Brooke L. , Mints, Miriam , Tyrer, Jonathan P. , Meindl, Alfons, Couch, Fergus J. , Giles, Graham G. , Cox, Angela , Pharoah, Paul D.P. , Spurdle, Amanda B. , Winham, Stacey J , Dörk, Thilo , Lambrechts, Diether , Webb, Penelope M , Hein, Alexander , Hillemanns, Peter , Swerdlow, Anthony J , Medland, Sarah E , O'Mara, Tracy A , Dunning, Alison M , Lambrechts, Diether , Brenner, Hermann , Li, Jingmei , Ekici, Arif B , Michailidou, Kyriaki , Brauch, Hiltrud , Lindblom, Annika
Cancer Epidemiology, Biomarkers & Prevention | August 22, 2016 | Volume: 25 | Issue: 11 | Pages: 1503-1510
Abstract Background: The strongest known risk factor for endometrial cancer is obesity. To determine whether SNPs associated with increased body mass index (BMI) or waist–hip ratio (WHR) are associated with endometrial cancer risk, independent of measured BMI, we investigated relationships between 77 BMI and 47 WHR SNPs and endometrial cancer in 6,609 cases and 37,926 country-matched controls. Methods: Logistic regression analysis and fixed effects meta-analysis were used to test for associations between endometrial cancer risk and (i) individual BMI or WHR SNPs, (ii) a combined weighted genetic risk score (wGRS) for BMI or WHR. Causality of BMI for endometrial cancer was assessed using Mendelian randomization, with BMIwGRS as instrumental variable. Results: The BMIwGRS was significantly associated with endometrial cancer risk (P = 3.4 × 10−17). Scaling the effect of the BMIwGRS on endometrial cancer risk by its effect on BMI, the endometrial cancer OR per 5 kg/m2 of genetically predicted BMI was 2.06 [95% confidence interval (CI), 1.89–2.21], larger than the observed effect of BMI on endometrial cancer risk (OR = 1.55; 95% CI, 1.44–1.68, per 5 kg/m2). The association attenuated but remained significant after adjusting for BMI (OR = 1.22; 95% CI, 1.10–1.39; P = 5.3 × 10−4). There was evidence of directional pleiotropy (P = 1.5 × 10−4). BMI SNP rs2075650 was associated with endometrial cancer at study-wide significance (P < 4.0 × 10−4), independent of BMI. Endometrial cancer was not significantly associated with individual WHR SNPs or the WHRwGRS. Conclusions: BMI, but not WHR, is causally associated with endometrial cancer risk, with evidence that some BMI-associated SNPs alter endometrial cancer risk via mechanisms other than measurable BMI. Impact: The causal association between BMI SNPs and endometrial cancer has possible implications for endometrial cancer risk modeling. Cancer Epidemiol Biomarkers Prev; 25(11); 1503–10. ©2016 AACR.
No evidence that protein truncating variants in BRIP1 are associated with breast cancer risk: implications for gene panel testing
Easton, Douglas F. , Lesueur, Fabienne , Decker, Brennan , Michailidou, Kyriaki , Li, Jun , Allen, Jamie , Luccarini, Craig , Pooley, Karen A. , Shah, Mitul , Bolla, Manjeet K. , Wang, Qin, Ahmad, Jamil , Thompson, Ella R. , Pertesi, Maroulio , Voegele, Catherine , Mebirouk, Noura, Robinot, Nivonirina , Forey, Nathalie, Luben, Robert , Aittomäki, Kristiina, Group, Australian Ovarian Cancer Study, Baynes, Caroline, Beckman, Matthias W., Benı́tez, Javier , Blot, William J. , Bogdanova, Natalia , Bojesen, Stig E. , Brenner, Hermann , Chang‐Claude, Jenny , Chia, Kee Seng , Choi, Ji‐Yeob , Conroy, Don, Darabi, Hatef, Devilee, Peter , Eriksson, Mikael , Fasching, Peter A. , Figueroa, Jonine D. , Flyger, Henrik, García‐Closas, Montserrat , Giles, Graham G. , Glendon, Gord, Guénel, Pascal , Haiman, Christopher A., Hart, Steven N. , Hartman, Mikael , Hooning, Maartje J. , Hsiung, Chia‐Ni , Jakubowska, Anna , James, Paul A. , John, Esther M. , Johnson, Nichola , Jones, Michael E. , Kabisch, Maria, Kang, Daehee , Investigators, kConFab, Kosma, Veli‐Matti , Kristensen, Vessela, Lambrechts, Diether , Li, Na , Investigators, Lifepool, Lindblom, Annika , Long, Jirong , Lophatananon, Artitaya, Lubiński, Jan , Mannermaa, Arto, Manoukian, Siranoush , Margolin, Sara , Matsuo, Keitaro , Meindl, Alfons , Mitchell, Gillian, Investigators, NBCS, Nevelsteen, Ines, Ouweland, Ans van den, Peterlongo, Paolo , Phuah, Sze Yee, Pylkäs, Katri , Rowley, Simone M. , Sangrajrang, Suleeporn , Schmutzler, Rita K., Shen, Chen‐Yang , Southey, Melissa C. , Surowy, Harald , Swerdlow, Anthony J. , Teo, Soo‐Hwang , Tollenaar, Rob A.�E.�M. , Tomlinson, Ian , Torres, Diana , Truong, Thérèse , Vachon, Celine M. , Verhoef, Senno, Wong‐Brown, Michelle W. , Zheng, Wei , Zheng, Ying , Scott, Rodney J. , Andrulis, Irene L. , Wu, Anna H. , Hopper, John L. , Winqvist, Robert , Burwinkel, Barbara , Sawyer, Elinor J. , Schmidt, Marjanka K. , Dörk, Thilo , Brauch, Hiltrud , Hamann, Ute, Fletcher, Olivia , Campbell, Ian , Dunning, Alison M. , Calvez‐Kelm, Florence Le , Goldgar, David E, Tavtigian, Sean V. , Chenevix‐Trench, Georgia , Thorne, Heather , Lambrechts, Diether , Luben, Robert N , Vachon, Celine, Decker, Brennan , Wang, Qin, Dennis, Joe , Damiola, Francesca , Durand, Geoffroy , Ahmed, Shahana , Anton‐Culver, Hoda , Arndt, Volker , Group, Australian Ovarian Cancer Study, Berg, David Van Den , Cox, Angela , Cross, Simon S. , Czene, Kamila , Eriksson, Mikael , Fostira, Florentia , González‐Neira, Anna , Hall, Per N , Hooning, Maartje J. , Ito, Hidemi , Investigators, kConFab, Kristensen, Vessela N. , Investigators, Lifepool, Mannermaa, Arto, Meindl, Alfons , Muir, Kenneth , Investigators, NBCS, Shu, Xiao‐Ou , Vachon, Celine M. , Nevanlinna, Heli , Couch, Fergus J. , Rudolph, Anja , Neuhausen, Susan L. , Milne, Roger L. , Pharoah, Paul D.P. , Goldgar, David E, Dörk, Thilo , Lambrechts, Diether , Giles, Graham G , James, Paul , Lesueur, Fabienne , Peterlongo, Paolo , Teo, Soo H , Swerdlow, Anthony J , Campbell, Ian G , John, Esther M , Southey, Melissa C , Matsuo, Keitaro , Hart, Steven N , Dunning, Alison M , Jakubowska, Anna , Jones, Michael E , Lambrechts, Diether , Brenner, Hermann , Guénel, Pascal , Hartman, Mikael , Torres, Diana , García-Closas, Montserrat , Schmidt, Marjanka K , Michailidou, Kyriaki , Bogdanova, Natalia V , Benitez, Javier , Chenevix-Trench, Georgia , Zheng, Wei , Figueroa, Jonine D , Pylkäs, Katri , Devilee, Peter , Manoukian, Siranoush , Lubinski, Jan , Fletcher, Olivia , Bojesen, Stig E , Truong, Therese , Brauch, Hiltrud , Lindblom, Annika , Sawyer, Elinor J , Kang, Daehee
Journal of Medical Genetics | April 22, 2016 | Volume: 53 | Issue: 5 | Pages: 298-309
Background BRCA1 interacting protein C-terminal helicase 1 (BRIP1) is one of the Fanconi Anaemia Complementation (FANC) group family of DNA repair proteins. Biallelic mutations in BRIP1 are responsible for FANC group J, and previous studies have also suggested that rare protein truncating variants in BRIP1 are associated with an increased risk of breast cancer. These studies have led to inclusion of BRIP1 on targeted sequencing panels for breast cancer risk prediction. Methods We evaluated a truncating variant, p.Arg798Ter (rs137852986), and 10 missense variants of BRIP1, in 48 144 cases and 43 607 controls of European origin, drawn from 41 studies participating in the Breast Cancer Association Consortium (BCAC). Additionally, we sequenced the coding regions of BRIP1 in 13 213 cases and 5242 controls from the UK, 1313 cases and 1123 controls from three population-based studies as part of the Breast Cancer Family Registry, and 1853 familial cases and 2001 controls from Australia. Results The rare truncating allele of rs137852986 was observed in 23 cases and 18 controls in Europeans in BCAC (OR 1.09, 95% CI 0.58 to 2.03, p=0.79). Truncating variants were found in the sequencing studies in 34 cases (0.21%) and 19 controls (0.23%) (combined OR 0.90, 95% CI 0.48 to 1.70, p=0.75). Conclusions These results suggest that truncating variants in BRIP1, and in particular p.Arg798Ter, are not associated with a substantial increase in breast cancer risk. Such observations have important implications for the reporting of results from breast cancer screening panels.
Identification and characterization of novel associations in the CASP8/ALS2CR12 region on chromosome 2 with breast cancer risk
Lin, Wei‐Yu , Camp, Nicola J. , Ghoussaini, Maya , Beesley, Jonathan, Michailidou, Kyriaki , Hopper, John L. , Apicella, Carmel, Southey, Melissa C. , Stone, Jennifer , Schmidt, Marjanka K. , Veer, Laura J. van’t , Muir, Kenneth , Lophatananon, Artitaya, Stewart‐Brown, Sarah , Siriwanarangsan, Pornthep, Fasching, Peter A. , Haeberle, Lothar, Ekici, Arif B. , Beckmann, Matthias W. , Peto, Julian, dos‐Santos‐Silva, Isabel , Fletcher, Olivia , Johnson, Nichola , Bolla, Manjeet K. , Wang, Qin, Sawyer, Elinor J. , Cheng, Timothy, Tomlinson, Ian , Kerin, Michael J. , Miller, Nicola, Surowy, Harald , Burwinkel, Barbara , Guénel, Pascal , Truong, Thérèse , Ménégaux, F. , Mulot, Claire , Bojesen, Stig E. , Nordestgaard, Børge G. , Nielsen, Sune F. , Flyger, Henrik, Benı́tez, Javier , Zamora, M. Pilar , Pérez, José Ignacio Arias , Menéndez, Primitiva, González‐Neira, Anna , Pita, Guillermo , Alonso, M. Rosario, Álvarez, Núria, Herrero, Daniel, Brenner, Hermann , Dieffenbach, Aida Karina, Stegmaier, Christa, Meindl, Alfons , Lichtner, Peter , Schmutzler, Rita K., Müller‐Myhsok, Bertram , Brauch, Hiltrud , Brüning, Thomas , Ko, Yon‐Dschun, Network, The GENICA, Tessier, Daniel C., Vincent, Daniel , Bacot, François, Nevanlinna, Heli , Aittomäki, Kristiina, Blomqvist, Carl , Khan, Sofia , Matsuo, Keitaro , Iwata, Hiroji, Horio, Akiyo, Bogdanova, Natalia , Antonenkova, Natalia, Dörk, Thilo , Lindblom, Annika , Margolin, Sara , Mannermaa, Arto, Kataja, Vesa , Kosma, Veli‐Matti, Hartikainen, Jaana M. , Investigators, kConFab, Group, Australian Ovarian Cancer Study, Wu, Anna H. , Tseng, Chiu-Chen , Neven, Patrick , Wauters, Els , Wildiers, Hans , Lambrechts, Diether , Chang‐Claude, Jenny , Flesch‐Janys, Dieter, Radice, Paolo , Peterlongo, Paolo , Manoukian, Siranoush , Couch, Fergus J. , Vachon, Celine M. , Purrington, Kristen S. , Giles, Graham G. , McLean, Catriona , Haiman, Christopher A., Henderson, Brian E., Schumacher, Fredrick R. , Simard, Jacques , Goldberg, Mark S. , Dumont, Martine , Teo, Soo‐Hwang , Yip, Cheng Har , Vithana, Eranga N. , Kristensen, Vessela N. , Deming-Halverson, Sandra, Shrubsole, Martha J. , Long, Jirong , Winqvist, Robert , Pylkäs, Katri , Jukkola‐Vuorinen, Arja , Kauppila, Saila , Andrulis, Irene L. , Knight, Julia A. , Glendon, Gord, Tchatchou, Sandrine, Devilee, Peter , Tollenaar, Robert A.E.M., Seynaeve, Caroline, García‐Closas, Montserrat , Figueroa, Jonine D. , Lissowska, Jolanta , Brinton, Louise A. , Czene, Kamila , Darabi, Hatef, Eriksson, Mikael , Brand, Judith S. , Hooning, Maartje J. , Hollestelle, Antoinette , Ouweland, Ans M.W. van den, Jager, Agnes , Li, Jingmei , Liu, Jianjun , Humphreys, Keith , Shu, Xiao‐Ou , Lu, Wei , Gao, Yu‐Tang , Cai, Hui , Cross, Simon S. , Reed, Malcolm , Blot, William J. , Signorello, Lisa B., Cai, Qiuyin, Perkins, Barbara, Shah, Mitul, Blows, Fiona M., Kang, Daehee , Yoo, Keun-Young, Noh, Dong‐Young , Hartman, Mikael , Miao, Hui , Chia, Kee Seng , Putti, Thomas Choudary , Hamann, Ute , Luccarini, Craig , Baynes, Caroline, Maranian, Mel, Healey, Catherine S., Jakubowska, Anna , Lubiński, Jan , Jaworska–Bieniek, Katarzyna, Durda, Katarzyna, Sangrajrang, Suleeporn , Gaborieau, Valérie , Brennan, Paul , McKay, James , Slager, Susan, Yannoukakos, Drakoulis , Hsiung, Chia‐Ni , Wu, Pei‐Ei , Ding, Shian-ling, Ashworth, Alan , Jones, Michael E. , Orr, Nick , Swerdlow, Anthony J. , Makalic, Enes , Bui, Minh , Hunter, David J. , Hein, Rebecca, Dahmen, Norbert, Beckmann, Lars , Aaltonen, Kirsimari, Muranen, Taru , Heikkinen, Tuomas , Irwanto, Astrid , Rahman, Nazneen , Turnbull, Clare , Study, The Breast and Ovarian Cancer Susceptibility (BOCS), Waisfisz, Quinten , Meijers‐Heijboer, Hanne , Adank, Muriel A. , Luijt, Rob B. van der , Chenevix‐Trench, Georgia , Dunning, Alison M. , Easton, Douglas F. , Cox, Angela , Durocher, Francine , Zheng, Wei , Thorne, Heather , Lambrechts, Diether , Vachon, Celine, Broeks, Annegien , Rutgers, Emiel J. , Wang, Qin, Dennis, Joe , Marmé, Frederik , Anton‐Culver, Hoda , Arndt, Volker , Meindl, Alfons , Network, The GENICA, Ito, Hidemi , Iwata, Hiroji , Mannermaa, Arto , Investigators, kConFab, Group, Australian Ovarian Cancer Study, Berg, David Van Den , Stram, Daniel O. , Rudolph, Anja , Seibold, Petra , Bonanni, Bernardo , Couch, Fergus J. , Wang, Xianshu , Vachon, Celine M. , Milne, Roger L. , Marchand, Loı̈c Le , Labrèche, France , Rudolph, Anja , Zheng, Wei , Asperen, Christi J. van , Eriksson, Mikael , Hooning, Maartje J. , Pharoah, Paul D.P. , Ahmed, Shahana , Toland, Amanda Ewart , Shen, Chen‐Yang , Tsimiklis, Helen , Schmidt, Daniel Frederick , Bui, Minh , Chanock, Stephen Jacob , Study, The Breast and Ovarian Cancer Susceptibility (BOCS), Hall, Per N , Nevanlinna, H , Dörk, Thilo , Lambrechts, Diether , Giles, Graham G , Peterlongo, Paolo , Teo, Soo H , Shrubsole, Martha J , Swerdlow, Anthony J , Radice, Paolo , Lissowska, Jolanta , Southey, Melissa C , van der Luijt, Rob B , Muir, Kenneth , Shu, Xiao-Ou , Matsuo, Keitaro , Dunning, Alison M , Jakubowska, Anna , Jones, Michael E , Lambrechts, Diether , Brenner, Hermann , Cox, Angela , Guénel, Pascal , Hartman, Mikael , Li, Jingmei , Muranen, Taru A , García-Closas, Montserrat , Schmidt, Marjanka K , Makalic, Enes , Ekici, Arif B , Michailidou, Kyriaki , Hartikainen, Jaana M , Bogdanova, Natalia V , Benitez, Javier , Simard, Jacques , Chenevix-Trench, Georgia , Zheng, Wei , Figueroa, Jonine D , Czene, Kamila , Stone, Jennifer , Pylkäs, Katri , Yannoukakos, Drakoulis , Devilee, Peter , Manoukian, Siranoush , Lubinski, Jan , Fletcher, Olivia , Bojesen, Stig E , Purrington, Kristen S , Truong, Therese , Wildiers, Hans , Mclean, Catriona , Brauch, Hiltrud , Lindblom, Annika , Sawyer, Elinor J , Orr, Nick , Liu, Jing , Kang, Daehee
Human Molecular Genetics | August 29, 2014 | Volume: 24 | Issue: 1 | Pages: 285-298
Genetic Variation in the Chromosome 17q23 Amplicon and Breast Cancer Risk
Kelemen, Linda E. , Fredericksen, Zachary S., Dunning, Alison M. , Easton, Douglas F. , Vierkant, Robert A. , Cerhan, James R. , Goode, Ellen L. , Couch, Fergus J., Wang, Xianshu , Pankratz, V. Shane , Pharoah, Paul D.P. , Ahmed, Shahana , Olson, Janet E. , Cerhan, James R , Vierkant, Robert A , Dunning, Alison M
Cancer Epidemiology, Biomarkers & Prevention | June 8, 2009 | Volume: 18 | Issue: 6 | Pages: 1864-1868
Abstract Background: Gene amplification leading to overexpression is a common event in breast tumors that is linked to tumor development and progression. The 17q23 region is amplified in >40% of breast tumors and contains several candidate oncogenes. Because common genetic variation in several oncogenes has been associated with cancer risk, we assessed the relevance of common variants in the 17q23 candidate oncogenes to breast cancer. Methods: We investigated 60 polymorphisms in the TUBD1, SEPT4, PRKCA, TBX2, TBX4, TEX14, TLK2, YPEL2, and PPM1E genes from this amplicon for association with breast cancer risk among 798 Caucasian breast cancer cases and 843 unaffected Caucasian controls from the Mayo Clinic. Results: Eight polymorphisms in PRKCA, TBX4, TLK2, and YPEL2 displayed significant dose-response associations with breast cancer risk (Ptrend < 0.05). Of these, PRKCA rs7342847 and TLK2 rs2245092 and rs733025 were also associated with hormone receptor–positive breast cancer: PRKCA rs7342847 (odds ratio, 0.7; 95% confidence interval, 0.6-0.9; Ptrend = 0.002) and TLK2 rs733025 and rs2245092 (both: odds ratio, 0.8; 95% confidence interval, 0.7-1.0; Ptrend = 0.03). Interactions between SEPT4 rs758377 and TEX14 rs302864 (Pinteraction = 0.0003) and between TLK2 rs733025 and YPEL2 rs16943468 (Pinteraction = 0.05) for risk of breast cancer were also observed. Conclusion: These findings suggest that single polymorphisms and combinations of polymorphisms within candidate oncogenes from the 17q23 amplicon may influence risk of breast cancer overall and possibly specific molecular subtypes of breast tumors. The findings are discussed within the context of the results from two independent data sets. (Cancer Epidemiol Biomarkers Prev 2009;18(6):1864–8)