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Vitamin D and prostate cancer
P Tuohimaa1, A Lyakhovich, N Aksenov
1Medical School, University of Tampere, 33014, Tampere, Finland. pentti.tuohimaa@uta.fi
Summary
Vitamin D deficiency is linked to increased prostate cancer risk, especially in younger men. Higher vitamin D levels may delay cancer onset and influence its aggressiveness, suggesting a protective role.
Area of Science:
- Oncology
- Endocrinology
- Nutritional Science
Background:
- Epidemiological studies suggest a correlation between vitamin D deficiency and increased prostate cancer risk.
- Prostate cancer risk appears to be influenced by age and serum 25-hydroxyvitamin D (25-VD) levels.
- Vitamin D's potential protective role against prostate cancer, particularly before andropause, warrants further investigation.
Purpose of the Study:
- To investigate the association between vitamin D levels and prostate cancer risk and progression.
- To explore the effect of full-spectrum lighting (FSL) on serum 25-VD concentrations.
- To elucidate the mechanisms of vitamin D action on prostate cancer cell proliferation and differentiation.
Main Methods:
- Nested case-control study with 13-year follow-up of 19,000 middle-aged men.
- Measurement of serum 25-VD levels and correlation with prostate cancer incidence and aggressiveness.
- In vitro studies using prostate cancer cell lines and animal models to examine vitamin D metabolism and signaling pathways.
Main Results:
- Vitamin D deficiency was prevalent, with over 50% of men having 25-VD levels below 50 nmol/l.
- Low 25-VD levels were associated with higher prostate cancer risk in younger men (40-51 years) but not older men.
- Higher 25-VD levels were linked to delayed prostate cancer diagnosis and potentially less aggressive disease.
- Full-spectrum lighting exposure did not significantly increase serum 25-VD levels after one month.
- Preliminary evidence suggests vitamin D is actively metabolized in the prostate and influences androgen receptor expression.
Conclusions:
- Vitamin D deficiency may increase prostate cancer risk, particularly in younger men, and higher levels may be protective.
- The protective effect of vitamin D appears to be age-dependent and potentially linked to androgen levels.
- Vitamin D influences prostate cancer cell proliferation and differentiation through complex metabolic and signaling pathways, including interactions with the androgen receptor.