RT Journal Article T1 Receptor activator of nuclear factor kB ligand, osteoprotegerin, and risk of death following a breast cancer diagnosis: results from the EPIC cohort. A1 Sarink, Danja A1 Schock, Helena A1 Johnson, Theron A1 Chang-Claude, Jenny A1 Overvad, Kim A1 Olsen, Anja A1 Tjønneland, Anne A1 Arveux, Patrick A1 Fournier, Agnès A1 Kvaskoff, Marina A1 Boeing, Heiner A1 Karakatsani, Anna A1 Trichopoulou, Antonia A1 La Vecchia, Carlo A1 Masala, Giovanna A1 Agnoli, Claudia A1 Panico, Salvatore A1 Tumino, Rosario A1 Sacerdote, Carlotta A1 van Gils, Carla H A1 Peeters, Petra H M A1 Weiderpass, Elisabete A1 Agudo, Antonio A1 Rodríguez-Barranco, Miguel A1 Huerta, José María A1 Ardanaz, Eva A1 Gil, Leire A1 Kaw, Kay Tee A1 Schmidt, Julie A A1 Dossus, Laure A1 His, Mathilde A1 Aune, Dagfinn A1 Riboli, Elio A1 Kaaks, Rudolf A1 Fortner, Renée T K1 Breast cancer K1 Epidemiology K1 Reproductive, hormonal, and related factors K1 Serum biomarkers of endogenous exposures AB Receptor activator of nuclear factor kappa-B (RANK)-signaling is involved in tumor growth and spread in experimental models. Binding of RANK ligand (RANKL) to RANK activates signaling, which is inhibited by osteoprotegerin (OPG). We have previously shown that circulating soluble RANKL (sRANKL) and OPG are associated with breast cancer risk. Here we extend these findings to provide the first data on pre-diagnosis concentrations of sRANKL and OPG and risk of breast cancer-specific and overall mortality after a breast cancer diagnosis. Two thousand six pre- and postmenopausal women with incident invasive breast cancer (1620 (81%) with ER+ disease) participating in the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort were followed-up for mortality. Pre-diagnosis concentrations of sRANKL and OPG were quantified in baseline serum samples using an enzyme-linked immunosorbent assay and electrochemiluminescent assay, respectively. Hazard ratios (HRs) and 95% confidence intervals (CIs) for breast cancer-specific and overall mortality were calculated using Cox proportional hazards regression models. Especially in women with ER+ disease, higher circulating OPG concentrations were associated with higher risk of breast cancer-specific (quintile 5 vs 1 HR 1.77 [CI 1.03, 3.04]; ptrend 0.10) and overall mortality (q5 vs 1 HR 1.39 [CI 0.94, 2.05]; ptrend 0.02). sRANKL and the sRANKL/OPG ratio were not associated with mortality following a breast cancer diagnosis. High pre-diagnosis endogenous concentrations of OPG, the decoy receptor for RANKL, were associated with increased risk of death after a breast cancer diagnosis, especially in those with ER+ disease. These results need to be confirmed in well-characterized patient cohorts. YR 2018 FD 2018-10-22 LK http://hdl.handle.net/10668/13117 UL http://hdl.handle.net/10668/13117 LA en DS RISalud RD Apr 10, 2025