Cited by 164Genetic Associations and EpidemiologyCancer Risks and FactorsObesity, Physical Activity, Diet

Mendelian randomization study of adiposity-related traits and risk of breast, ovarian, prostate, lung and colorectal cancer

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Gao, Chi, Patel, Chirag J, Michailidou, Kyriaki, Peters, Ulrike, Gong, Jian, Schildkraut, Joellen, Schumacher, Fredrick R, Zheng, Wei +14 more·2016·International Journal of Epidemiology

Abstract

BACKGROUND: Adiposity traits have been associated with risk of many cancers in observational studies, but whether these associations are causal is unclear. Mendelian randomization (MR) uses genetic predictors of risk factors as instrumental variables to eliminate reverse causation and reduce confounding bias. We performed MR analyses to assess the possible causal relationship of birthweight, childhood and adult body mass index (BMI), and waist-hip ratio (WHR) on the risks of breast, ovarian, prostate, colorectal and lung cancers. METHODS: We tested the association between genetic risk scores and each trait using summary statistics from published genome-wide association studies (GWAS) and from 51 537 cancer cases and 61 600 controls in the Genetic Associations and Mechanisms in Oncology (GAME-ON) Consortium. RESULTS: We found an inverse association between the genetic score for childhood BMI and risk of breast cancer [odds ratio (OR) = 0.71 per standard deviation (s.d.) increase in childhood BMI; 95% confidence interval (CI): 0.60, 0.80; P = 6.5 × 10(-5)). We also found the genetic score for adult BMI to be inversely associated with breast cancer risk (OR = 0.66 per s.d. increase in BMI; 95% CI: 0.57, 0.77; P = 2.5 × 10(-7)), and positively associated with ovarian cancer (OR = 1.35; 95% CI: 1.05, 1.72; P = 0.017), lung cancer (OR = 1.27; 95% CI: 1.09, 1.49; P = 2.9 × 10(-3)) and colorectal cancer (OR = 1.39; 95% CI: 1.06, 1.82, P = 0.016). The inverse association between genetically predicted adult BMI and breast cancer risk remained even after adjusting for directional pleiotropy via MR-Egger regression. CONCLUSIONS: Findings from this study provide additional understandings of the complex relationship between adiposity and cancer risks. Our results for breast and lung cancer are particularly interesting, given previous reports of effect heterogeneity by menopausal status and smoking status.

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Crossref · 10.1093/ije/dyw129

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  • Gao et al. do not provide any information on the strength of the different instrumental variables, such as the F-statistic or R2 for the genetic instrument-adiposity trait associations.

    “Gao and colleagues do not provide any information on the strength of the different instrumental variables, such as the F-statistic or R 2 for the genetic instrument-adiposity trait associations.”
  • Gao et al. were unable with the summary data available to test differences in effect between pre- and postmenopausal breast cancer because GWAS separated by these sub-phenotypes are not presented by the breast cancer consortia.

    “They are unable with the summary data available to test differences in effect between pre- and postmenopausal breast cancer, as GWAS separated by these sub-phenotypes are not presented by the breast cancer consortia.”
  • Greater adult body mass index, but not waist-hip ratio, is concluded by Gao et al. to decrease breast cancer and increase ovarian, lung and colorectal cancer risk.

    “Greater adult BMI, but not waist-hip ratio (WHR), is concluded to decrease breast cancer and increase ovarian, lung and colorectal cancer risk.”
  • Gao et al. analysed large numbers of cancer cases: 15,748 breast, 5,100 colorectal, 12,160 lung, 4,369 ovarian, and 14,160 prostate cancer.

    “The paper by Gao and colleagues illustrates this with the large numbers of cancer cases that they analyse: 15 748, 5100, 12 160, 4369 and 14 160, respectively, for breast, colorectal, lung, ovarian and prostate cancer.”
  • Gao et al. found the same inverse association with estrogen receptor-positive cancers as seen for all breast cancer cases combined.

    “but Gao and colleagues are able to examine effects with estrogen receptor-positive cancers and they find the same inverse association with these as seen for all breast cancer cases combined.”

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Research works printed but not linked: 2

  1. Magnusson C, Baron J, Persson I, et al. Body size in different periods of life and breast cancer risk in post-menopausal women. Int J Cancer 1998 Mar 30;76(1):29-34.
  2. Bardou M, Barkun AN, Martel M. Obesity and colorectal can- cer. Gut 2013;62:933-47.

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Authors
Gao, C., Patel, C. J., Michailidou, K., Peters, U., Gong, J., Schildkraut, J., Schumacher, F. R., Zheng, W., Boffetta, P., Stucker, I., Willett, W., Gruber, S., Easton, D. F., Hunter, D. J., Sellers, T. A., Haiman, C., Henderson, B. E., Hung, R. J., Amos, C., Pierce, B. L., Lindström, S., & Kraft, P.
Affiliations
  • Harvard University (US)
  • University of Cambridge (GB)
  • Fred Hutch Cancer Center (US)
  • Duke University (US)
  • USC Norris Comprehensive Cancer Center (US)
  • Vanderbilt University (US)
  • Tisch Cancer Institute (US)
  • University of Southern California (US)
  • Moffitt Cancer Center (US)
  • Mount Sinai Hospital (CA)
  • Dartmouth College (US)
  • University of Chicago (US)
Corresponding author
Kraft, Peter
Venue
International Journal of Epidemiology
Published
2016-06
Volume
45
Issue
3
Pages
896-908
ISSN
  • 0300-5771 (ISSN-L)
  • 1464-3685
OpenAlex
W2483210912
Cited by
163
References
59
Citations by year
2026: 8 · 2025: 13 · 2024: 7 · 2023: 10 · 2022: 28 · 2021: 21 · 2020: 18 · 2019: 15 · 2018: 16 · 2017: 17 · 2016: 9
FWCI
15.33
Type
journal article
Language
en
Open access
Locations
  • International Journal of Epidemiology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Pure Amsterdam UMC (publishedVersion, cc-by)
  • Amsterdam UMC (VU Amsterdam) - Institutional Repository (publishedVersion, other-oa)
  • EUR Research Repository (Erasmus University Rotterdam) (publishedVersion, cc-by)
  • EUR Research Repository (Erasmus University Rotterdam) (submittedVersion, cc-by)
  • Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) (submittedVersion)
  • HighWire Press Open Archive (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
Funders
  • Mayo Clinic
  • Wellcome Trust (085475, 076113)
  • Cancer Research UK (U19 CA148065, U19 CA148112, C1287, C1178/A3947, C150/A5660, 16563, U19 CA148537, A16563, C490/A8339, C1287‐A16563)
  • National Institute for Health and Care Research (U19 CA148065, C1287/A16563)
  • European Commission (U19-CA148112, U19 CA148065, C1287/A16563)
  • ZonMw (050-060-810)
  • Erasmus Medisch Centrum (014-93-015)
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek (050.060.810, 911-03-012, 175.010.200, 175.010.2005.011)
  • National Institutes of Health (C1287/A16563, CA15083, CA148127)
  • National Cancer Institute (R03CA165131, U19CA148107, U19CA148065, U19CA148537, CA148065, U19CA148127, U19CA148112, C1287/A16563, CA 15083, R01CA114343, P30CA15083, P30CA023108, P30CA015083)
  • National Institute of Environmental Health Sciences (ES025052, R21ES025052, K99ES023504, R00ES023504, C1287/A16563)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Health Sciences › Medicine › Oncology › Cancer Risks and Factors
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
Keywords
adiposity, body mass index, childhood BMI, birth weight, waist-to-hip ratio, breast cancer, ovarian cancer, prostate cancer, lung cancer, colorectal cancer, cancer risk, causal inference, polygenic risk score, pleiotropy, menopausal status, smoking status
MeSH terms
Breast Neoplasms, Female, Humans, Lung Neoplasms, Male, Neoplasms, Ovarian Neoplasms, Phenotype, Prostatic Neoplasms, Regression Analysis, Risk Factors, Colorectal Neoplasms, Body Mass Index, Odds Ratio, Polymorphism, Single Nucleotide, Waist-Hip Ratio, Adiposity, Mendelian Randomization Analysis

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