Mitochondrial DNA copy number variation and pancreatic cancer risk in the prospective EPIC cohort

Manuel Gentiluomo, Verena A Katzke, Rudolf Kaaks, Anne Tjonneland, Gianluca Severi, Vittorio Perduca, Marie-Christine Boutron-Ruault, Elisabete Weiderpass, Pietro Ferrari, Theron Johnson, Matthias B Schulze, Manuela Bergmann, Antonia Trichopoulou, Anna Karakatsani, Carlo La Vecchia, Domenico Palli, Sara Grioni, Salvatore Panico, Rosario Tumino, Carlotta SacerdoteBas Bueno-de-Mesquita, Roel Vermeulen, Torkjel M Sandanger, J Ramón Quirós, Miguel Rodríguez-Barranco, Pilar Amiano, Sandra Colorado-Yohar, Eva Ardanaz, Malin Sund, Kay-Tee Khaw, Nicholas J Wareham, Julie A Schmidt, Paula Jakszyn, Luca Morelli, Federico Canzian, Daniele Campa

    Research output: Contribution to journalArticleAcademicpeer-review

    Abstract

    BACKGROUND: 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.

    METHODS: 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.

    RESULTS: We observed lower mtDNA copy number with advancing age (p=6.54×10-5) and with a high 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 OR=0.35 (95% C.I 0.16-0.79), p=0.01 when comparing the 5th quintile with the 1st using an unconditional logistic regression and OR=0.19 (95% C.I 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.

    CONCLUSIONS: Our results, suggest a protective effect of a higher number of mitochondria, measured in peripheral blood leukocytes, on PDAC risk.

    IMPACT: Our findings highlight the importance of understanding the mitochondrial biology in pancreatic cancer.

    Original languageEnglish
    Pages (from-to)681-686
    Number of pages6
    JournalCancer Epidemiology Biomarkers and Prevention
    Volume29
    Issue number3
    Early online date13 Jan 2020
    DOIs
    Publication statusPublished - Mar 2020

    Fingerprint

    Dive into the research topics of 'Mitochondrial DNA copy number variation and pancreatic cancer risk in the prospective EPIC cohort'. Together they form a unique fingerprint.

    Cite this