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Article

Iron Status and Cancer Risk in UK Biobank: A Two-Sample Mendelian Randomization Study

1
Unit of Cardiovascular and Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, SE-171 77 Stockholm, Sweden
2
Department of Surgical Sciences, Uppsala University, SE-751 85 Uppsala, Sweden
3
Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, UK
4
MRC Cancer Unit, University of Cambridge, Cambridge CB2 0XZ, UK
5
MRC Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol BS8 1QU, UK
6
Departments of Epidemiology and Nutrition, Harvard T. H. Chan School of Public Health, Boston, MA 02115, USA
7
Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital, and Harvard Medical School, Boston, MA 02115, USA
8
MRC Biostatistics Unit, University of Cambridge, Cambridge CB2 0SR, UK
*
Author to whom correspondence should be addressed.
Nutrients 2020, 12(2), 526; https://doi.org/10.3390/nu12020526
Submission received: 22 January 2020 / Revised: 17 February 2020 / Accepted: 18 February 2020 / Published: 19 February 2020

Abstract

We conducted a two-sample Mendelian randomization study to explore the associations of iron status with overall cancer and 22 site-specific cancers. Single-nucleotide polymorphisms for iron status were obtained from a genome-wide association study of 48,972 European-descent individuals. Summary-level data for breast and other cancers were obtained from the Breast Cancer Association Consortium and UK Biobank. Genetically predicted iron status was positively associated with liver cancer and inversely associated with brain cancer but not associated with overall cancer or the other 20 studied cancer sites at p < 0.05. The odds ratios of liver cancer were 2.45 (95% CI, 0.81, 7.45; p = 0.11), 2.11 (1.16, 3.83; p = 0.02), 10.89 (2.44, 48.59; p = 0.002) and 0.30 (0.17, 0.53; p = 2 × 10−5) for one standard deviation increment of serum iron, transferrin saturation, ferritin and transferrin levels, respectively. For brain cancer, the corresponding odds ratios were 0.69 (0.48, 1.00; p = 0.05), 0.75 (0.59, 0.97; p = 0.03), 0.41 (0.20, 0.88; p = 0.02) and 1.49 (1.04, 2.14; p = 0.03). Genetically high iron status was positively associated with liver cancer and inversely associated with brain cancer.
Keywords: iron; transferrin saturation; ferritin; serum transferrin; cancer; Mendelian randomization iron; transferrin saturation; ferritin; serum transferrin; cancer; Mendelian randomization

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MDPI and ACS Style

Yuan, S.; Carter, P.; Vithayathil, M.; Kar, S.; Giovannucci, E.; Mason, A.M.; Burgess, S.; Larsson, S.C. Iron Status and Cancer Risk in UK Biobank: A Two-Sample Mendelian Randomization Study. Nutrients 2020, 12, 526. https://doi.org/10.3390/nu12020526

AMA Style

Yuan S, Carter P, Vithayathil M, Kar S, Giovannucci E, Mason AM, Burgess S, Larsson SC. Iron Status and Cancer Risk in UK Biobank: A Two-Sample Mendelian Randomization Study. Nutrients. 2020; 12(2):526. https://doi.org/10.3390/nu12020526

Chicago/Turabian Style

Yuan, Shuai, Paul Carter, Mathew Vithayathil, Siddhartha Kar, Edward Giovannucci, Amy M. Mason, Stephen Burgess, and Susanna C. Larsson. 2020. "Iron Status and Cancer Risk in UK Biobank: A Two-Sample Mendelian Randomization Study" Nutrients 12, no. 2: 526. https://doi.org/10.3390/nu12020526

APA Style

Yuan, S., Carter, P., Vithayathil, M., Kar, S., Giovannucci, E., Mason, A. M., Burgess, S., & Larsson, S. C. (2020). Iron Status and Cancer Risk in UK Biobank: A Two-Sample Mendelian Randomization Study. Nutrients, 12(2), 526. https://doi.org/10.3390/nu12020526

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