1. Germline polymorphisms in an enhancer of PSIP1 are associated with progression-free survival in epithelial ovarian cancer
- Author
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French, Juliet D, Johnatty, Sharon E, Lu, Yi, Beesley, Jonathan, Gao, Bo, Kalimutho, Murugan, Henderson, Michelle J, Russell, Amanda J, Kar, Siddhartha, Chen, Xiaoqing, Hillman, Kristine M, Kaufmann, Susanne, Sivakumaran, Haran, O’Reilly, Martin, Wang, Chen, Korbie, Darren J, Group, Australian Ovarian Cancer Study, Study, Australian Cancer, Lambrechts, Diether, Despierre, Evelyn, Van Nieuwenhuysen, Els, Lambrechts, Sandrina, Vergote, Ignace, Karlan, Beth, Lester, Jenny, Orsulic, Sandra, Walsh, Christine, Fasching, Peter A, Beckmann, Matthias W, Ekici, Arif B, Hein, Alexander, Matsuo, Keitaro, Hosono, Satoyo, Pisterer, Jacobus, Hillemanns, Peter, Nakanishi, Toru, Yatabe, Yasushi, Goodman, Marc T, Lurie, Galina, Matsuno, Rayna K, Thompson, Pamela J, Pejovic, Tanja, Bean, Yukie, Heitz, Florian, Harter, Philipp, du Bois, Andreas, Schwaab, Ira, Hogdall, Estrid, Kjaer, Susanne K, Jensen, Allan, Hogdall, Claus, Lundvall, Lene, Engelholm, Svend Aage, Brown, Bob, Flanagan, James M, Metcalf, Michelle D, Siddiqui, Nadeem, Sellers, Thomas, Fridley, Brooke, Cunningham, Julie, Schildkraut, Joellen M, Iversen, Ed, Weber, Rachel Palmieri, Brennan, Donal, Berchuck, Andrew, Pharoah, Paul, Harnett, Paul, Norris, Murray D, Haber, Michelle, Goode, Ellen L, Lee, Jason S, Khanna, Kum Kum, Meyer, Kerstin B, Chenevix-Trench, Georgia, deFazio, Anna, Edwards, Stacey L, MacGregor, Stuart, and Consortium, on behalf of the Ovarian Cancer Association
- Subjects
Genetics ,Rare Diseases ,Human Genome ,Ovarian Cancer ,Cancer ,Aetiology ,2.1 Biological and endogenous factors ,Adaptor Proteins ,Signal Transducing ,Apoptosis ,Biomarkers ,Tumor ,Cell Proliferation ,Chromatin Immunoprecipitation ,Cohort Studies ,Cystadenocarcinoma ,Serous ,Electrophoretic Mobility Shift Assay ,Enhancer Elements ,Genetic ,Fallopian Tube Neoplasms ,Female ,Follow-Up Studies ,Germ-Line Mutation ,Humans ,Ovarian Neoplasms ,Peritoneal Neoplasms ,Polymorphism ,Single Nucleotide ,Prognosis ,RNA ,Messenger ,Real-Time Polymerase Chain Reaction ,Reverse Transcriptase Polymerase Chain Reaction ,Survival Rate ,Transcription Factors ,Tumor Cells ,Cultured ,epithelial ovarian cancer ,progression free survival ,genome-wide association study ,PSIP1 ,chromosome conformation capture ,Australian Ovarian Cancer Study Group ,Australian Ovarian Cancer Study ,Ovarian Cancer Association Consortium ,Oncology and Carcinogenesis - Abstract
Women with epithelial ovarian cancer (EOC) are usually treated with platinum/taxane therapy after cytoreductive surgery but there is considerable inter-individual variation in response. To identify germline single-nucleotide polymorphisms (SNPs) that contribute to variations in individual responses to chemotherapy, we carried out a multi-phase genome-wide association study (GWAS) in 1,244 women diagnosed with serous EOC who were treated with the same first-line chemotherapy, carboplatin and paclitaxel. We identified two SNPs (rs7874043 and rs72700653) in TTC39B (best P=7x10-5, HR=1.90, for rs7874043) associated with progression-free survival (PFS). Functional analyses show that both SNPs lie in a putative regulatory element (PRE) that physically interacts with the promoters of PSIP1, CCDC171 and an alternative promoter of TTC39B. The C allele of rs7874043 is associated with poor PFS and showed increased binding of the Sp1 transcription factor, which is critical for chromatin interactions with PSIP1. Silencing of PSIP1 significantly impaired DNA damage-induced Rad51 nuclear foci and reduced cell viability in ovarian cancer lines. PSIP1 (PC4 and SFRS1 Interacting Protein 1) is known to protect cells from stress-induced apoptosis, and high expression is associated with poor PFS in EOC patients. We therefore suggest that the minor allele of rs7874043 confers poor PFS by increasing PSIP1 expression.
- Published
- 2016