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A Mendelian randomization study of the effects of blood lipids on breast cancer risk

Author

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  • Christoph Nowak

    (Karolinska Institutet)

  • Johan Ärnlöv

    (Karolinska Institutet
    Dalarna University (Högskola Dalarna))

Abstract

Observational studies have reported inconsistent associations between circulating lipids and breast cancer risk. Using results from >400,000 participants in two-sample Mendelian randomization, we show that genetically raised LDL-cholesterol is associated with higher risk of breast cancer (odds ratio, OR, per standard deviation, 1.09, 95% confidence interval, 1.02–1.18, P = 0.020) and estrogen receptor (ER)-positive breast cancer (OR 1.14 [1.05–1.24] P = 0.004). Genetically raised HDL-cholesterol is associated with higher risk of ER-positive breast cancer (OR 1.13 [1.01–1.26] P = 0.037). HDL-cholesterol-raising variants in the gene encoding the target of CETP inhibitors are associated with higher risk of breast cancer (OR 1.07 [1.03–1.11] P = 0.001) and ER-positive breast cancer (OR 1.08 [1.03–1.13] P = 0.001). LDL-cholesterol-lowering variants mimicking PCSK9 inhibitors are associated (P = 0.014) with lower breast cancer risk. We find no effects related to the statin and ezetimibe target genes. The possible risk-promoting effects of raised LDL-cholesterol and CETP-mediated raised HDL-cholesterol have implications for breast cancer prevention and clinical trials.

Suggested Citation

  • Christoph Nowak & Johan Ärnlöv, 2018. "A Mendelian randomization study of the effects of blood lipids on breast cancer risk," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06467-9
    DOI: 10.1038/s41467-018-06467-9
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    Cited by:

    1. Diana Dunca & Sandesh Chopade & María Gordillo-Marañón & Aroon D. Hingorani & Karoline Kuchenbaecker & Chris Finan & Amand F. Schmidt, 2024. "Comparing the effects of CETP in East Asian and European ancestries: a Mendelian randomization study," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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