RT Journal Article T1 Mitochondrial DNA Copy-Number Variation and Pancreatic Cancer Risk in the Prospective EPIC Cohort. A1 Gentiluomo, Manuel A1 Katzke, Verena A A1 Kaaks, Rudolf A1 Tjønneland, Anne A1 Severi, Gianluca A1 Perduca, Vittorio A1 Boutron-Ruault, Marie-Christine A1 Weiderpass, Elisabete A1 Ferrari, Pietro A1 Johnson, Theron A1 Schulze, Matthias B A1 Bergmann, Manuela A1 Trichopoulou, Antonia A1 Karakatsani, Anna A1 La Vecchia, Carlo A1 Palli, Domenico A1 Grioni, Sara A1 Panico, Salvatore A1 Tumino, Rosario A1 Sacerdote, Carlotta A1 Bueno-de-Mesquita, Bas A1 Vermeulen, Roel A1 Sandanger, Torkjel M A1 Quiros, J Ramon A1 Rodriguez-Barranco, Miguel A1 Amiano, Pilar A1 Colorado-Yohar, Sandra A1 Ardanaz, Eva A1 Sund, Malin A1 Khaw, Kay-Tee A1 Wareham, Nicholas J A1 Schmidt, Julie A A1 Jakszyn, Paula A1 Morelli, Luca A1 Canzian, Federico A1 Campa, Daniele AB Mitochondrial DNA (mtDNA) copy number in peripheral blood has been found to be associated with risk of developing several cancers. However, data on pancreatic ductal adenocarcinoma (PDAC) are very limited. To further our knowledge on this topic, we measured relative mtDNA copy number by a quantitative real-time PCR assay in peripheral leukocyte samples of 476 PDAC cases and 357 controls nested within the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort. We observed lower mtDNA copy number with advancing age (P = 6.54 × 10-5) and with a high body mass index (BMI) level (P = 0.004) and no association with sex, smoking behavior, and alcohol consumption. We found an association between increased mtDNA copy number and decreased risk of developing PDAC with an odds ratios (OR) of 0.35 [95% confidence interval (CI), 0.16-0.79; P = 0.01] when comparing the fifth quintile with the first using an unconditional logistic regression and an OR of 0.19 (95% CI, 0.07-0.52; P = 0.001) with a conditional analysis. Analyses stratified by BMI showed an association between high mtDNA copy number and decreased risk in the stratum of normal weight, consistent with the main analyses. Our results suggest a protective effect of a higher number of mitochondria, measured in peripheral blood leukocytes, on PDAC risk. Our findings highlight the importance of understanding the mitochondrial biology in pancreatic cancer. PB American Association for Cancer Research YR 2020 FD 2020-01-07 LK http://hdl.handle.net/10668/14952 UL http://hdl.handle.net/10668/14952 LA en NO Gentiluomo M, Katzke VA, Kaaks R, Tjønneland A, Severi G, Perduca V, et al. Mitochondrial DNA Copy-Number Variation and Pancreatic Cancer Risk in the Prospective EPIC Cohort. Cancer Epidemiol Biomarkers Prev. 2020 Mar;29(3):681-686. NO We thank the National Institute for Public Health and the Environment (RIVM),Bilthoven, the Netherlands, for their contribution and ongoing support to the EPICStudy. This work was partially supported by intramural funds of University of Pisaand DKFZ, by Fondazione Tizzi, and by Fondazione Arpa (www.fondazionearpa.it).The EPIC-Potsdam study was funded by the Federal Ministry of Education andResearch (Germany), the German Cancer Aid, the German Cancer Research Center,and the German Institute of Human Nutrition Potsdam-Rehbr€ucke. EPIC-Oxfordwas supported by Cancer Research UK (C8221/A19170) and the Medical ResearchCouncil UK (MR/M012190/1). EPIC-Greece was supported by the Hellenic HealthFoundation. DS RISalud RD Apr 5, 2025