Abstract
In the present study, the effects of β-tocopherol (β-T) on growth and apoptosis of human prostate cancer cells were determined and compared with that of Δ-tocopherol (Δ-T), a commonly used form of vitamin E. Treatment of human prostate cancer cells with β-T resulted in strong growth inhibition and apoptosis stimulation, while the effects of Δ-T were modest. The strong effects of β-T on the cells were associated with suppression of androgen receptor (AR) activity and decreased level of prostate specific antigen (PSA) that is a downstream target of the AR signaling. In the in vivo study, we found that β-T had a more potent inhibitory effect on the formation and growth of prostate xenograft tumors than that of Δ-T. Moreover, β-T inhibited proliferation and stimulated apoptosis in the tumors. The present study identified β-T as a better form of vitamin E than Δ-T for future clinical studies of prostate cancer prevention.
Original language | English |
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Pages (from-to) | 10752-10758 |
Number of pages | 7 |
Journal | Journal of Agricultural and Food Chemistry |
Volume | 62 |
Issue number | 44 |
DOIs | |
State | Published - Nov 5 2014 |
Bibliographical note
Publisher Copyright:© 2014 American Chemical Society.
Funding
Funders | Funder number |
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National Childhood Cancer Registry – National Cancer Institute | P30CA072720 |
National Childhood Cancer Registry – National Cancer Institute |
Keywords
- AR signaling
- apoptosis
- prostate cancer
- tocopherol
- vitamin E
- xenograft tumor
ASJC Scopus subject areas
- General Chemistry
- General Agricultural and Biological Sciences