Abstract
Objective
Investigate the relationship between serum α-tocopherol concentration and long-term risk of prostate cancer, and evaluate the interaction with vitamin E-related genetic variants and their polygenic risk score (PRS).
Methods
We conducted a biochemical analysis of 29,102 male Finnish smokers in the Alpha-Tocopherol, Beta-Carotene Cancer Prevention Study. Serum α-tocopherol was measured at baseline using high-performance liquid chromatography, and 2724 prostate cancer cases were identified during 28 years of follow-up. Cox proportional hazards models examined whether serum α-tocopherol concentrations were associated with prostate cancer risk. Among 8383 participants, three SNPs related to vitamin E status (rs964184, rs2108622, and rs11057830) were examined to determine whether they modified the relationship between serum α-tocopherol concentrations and prostate cancer risk, both individually and as a PRS using logistic regression models.
Results
No association was observed between serum α-tocopherol and prostate cancer risk (fifth quintile (Q5) vs. Q1 hazard ratio (HR) = 0.87, 95% confidence interval (95% CI) 0.75, 1.02; P-trend = 0.57). Though no interactions were seen by population characteristics, high α-tocopherol concentration was associated with reduced prostate cancer risk among the trial α-tocopherol supplementation group (Q5 quintile vs. Q1 HR = 0.79, 95% CI 0.64, 0.99). Finally, no associated interaction between the three SNPs or their PRS and prostate cancer risk was observed.
Conclusion
Although there was a weak inverse association between α-tocopherol concentration and prostate cancer risk over nearly three decades, our findings suggest that men receiving the trial α-tocopherol supplementation who had higher baseline serum α-tocopherol concentration experienced reduced prostate cancer risk. Vitamin E-related genotypes did not modify the serum α-tocopherol-prostate cancer risk association.
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Code availability
The analytical methods for this study are available from the corresponding authors (WRL and DA) upon appropriate request.
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Acknowledgements
We appreciate the participants in the Alpha-Tocopherol, Beta-Carotene Cancer Prevention Study for their contributions to this research.
Funding
The Alpha-Tocopherol, Beta-Carotene Cancer Prevention Study is supported by the Intramural Research Program of the United States National Cancer Institute, National Institutes of Health, and Department of Health and Human Services.
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Conception and design: WRL and DA. Development of methodology: WRL, JH, and DA. Acquisition of data: WRL, SJW, and DA. Analysis and interpretation of data (e.g., statistical analysis, biostatistics, computational analysis): WRL, JL, JH, SJW, SM, and DA. Writing, review, and/or revision of the manuscript: WRL, JL, JH, SJW, SM, and DA.
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Lawrence, W.R., Lim, JE., Huang, J. et al. A 28-year prospective analysis of serum vitamin E, vitamin E-related genetic variation and risk of prostate cancer. Prostate Cancer Prostatic Dis 25, 553–560 (2022). https://doi.org/10.1038/s41391-022-00511-y
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DOI: https://doi.org/10.1038/s41391-022-00511-y