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RATIONALE: Selenium supplements may stop or delay the development of prostate cancer in patients at high risk of prostate cancer. It is not yet known which dose of selenium may be more effective in preventing prostate cancer.
PURPOSE: This randomized phase III trial is studying how well selenium works in preventing prostate cancer.
- To determine whether selenium (Se) supplementation decreases the incidence of prostate cancer.
- To determine whether Se supplementation inhibits the biochemical progression of prostate cancer.
OUTLINE: This is a multicenter study. Patients are randomized to 1 of 3 treatment arms.
- Arm I: Patients receive oral placebo daily. Treatment continues for up to 57 months in the absence of unacceptable toxicity or diagnosis of prostate cancer.
- Arm II: Patients receive 200 μg of oral selenium (Se) as high-Se Baker's yeast daily. Treatment continues for up to 57 months in the absence of unacceptable toxicity or diagnosis of prostate cancer.
- Arm III: Patients receive 400 μg of oral Se as high-Se baker's yeast daily. Treatment continues for up to 57 months in the absence of unacceptable toxicity or diagnosis of prostate cancer.
Blood samples are collected at baseline, at randomization, and then semi-annually for laboratory and other testing. Tissue samples may also be collected for biomarker analysis. Patients complete an initial questionnaire and urological-symptoms questionnaire at baseline, a follow-up questionnaire after randomization (to capture new illness, medications, and toxicity symptoms during the 30-day run-in period; a urological-symptoms questionnaire; a food-frequency questionnaire; and a mood questionnaire). Patients then undergo questionnaires semi-annually, including vital status, tablet compliance, nutrition, mood, new illnesses or medications, and any incidence of cancer or family history of cancer).
Allocation: Randomized, Control: Placebo Control, Masking: Double-Blind, Primary Purpose: Prevention
high-selenium baker's yeast, selenium, placebo
Not yet recruiting
National Cancer Institute (NCI)
Published on BioPortfolio: 2014-08-27T03:19:17-0400
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A selenium compound used as a source of SELENIUM, especially for patients that develop selenium deficiency following prolonged PARENTERAL NUTRITION.
Unstable isotopes of selenium that decay or disintegrate emitting radiation. Se atoms with atomic weights 70-73, 75, 79, 81, and 83-85 are radioactive selenium isotopes.
A group of proteins that covalently attach to selenium or SELENIUM-containing compounds.
Inorganic compounds formed through the oxidation of selenium.
Inorganic compounds that contain selenium as an integral part of the molecule.
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