The Effects of Lycopene on High Risk Prostatic Tissue

Summary

The purpose of this research study is to compare the effects of a lycopene supplement made from tomatoes to a placebo (a capsule with no active ingredients) in men who have abnormal cells in the prostate, but have not yet had cancer detected. This study will allow us to see if taking lycopene for six months leads to favorable changes in abnormal prostate tissue and in chemicals measured in the blood that go along with a higher risk of developing cancer.

Timeline

Start

2006-02

Primary completion

2009-04

Completion

2009-04

Publications

• Background Clinton SK, Emenhiser C, Schwartz SJ, Bostwick DG, Williams AW, Moore BJ, Erdman JW Jr. cis-trans lycopene isomers, carotenoids, and retinol in the human prostate. Cancer Epidemiol Biomarkers Prev. 1996 Oct;5(10):823-33.
• Background Pastori M, Pfander H, Boscoboinik D, Azzi A. Lycopene in association with alpha-tocopherol inhibits at physiological concentrations proliferation of prostate carcinoma cells. Biochem Biophys Res Commun. 1998 Sep 29;250(3):582-5. doi: 10.1006/bbrc.1998.9351.
• Background Giovannucci E. Tomatoes, tomato-based products, lycopene, and cancer: review of the epidemiologic literature. J Natl Cancer Inst. 1999 Feb 17;91(4):317-31. doi: 10.1093/jnci/91.4.317.
• Background Jain MG, Hislop GT, Howe GR, Ghadirian P. Plant foods, antioxidants, and prostate cancer risk: findings from case-control studies in Canada. Nutr Cancer. 1999;34(2):173-84. doi: 10.1207/S15327914NC3402_8.
• Background Giovannucci E, Ascherio A, Rimm EB, Stampfer MJ, Colditz GA, Willett WC. Intake of carotenoids and retinol in relation to risk of prostate cancer. J Natl Cancer Inst. 1995 Dec 6;87(23):1767-76. doi: 10.1093/jnci/87.23.1767.
• Background Bostwick DG, Shan A, Qian J, Darson M, Maihle NJ, Jenkins RB, Cheng L. Independent origin of multiple foci of prostatic intraepithelial neoplasia: comparison with matched foci of prostate carcinoma. Cancer. 1998 Nov 1;83(9):1995-2002. doi: 10.1002/(sici)1097-0142(19981101)83:93.0.co;2-2.
• Background Kley HK. [Therapy of Cushing's syndrome. Critical evaluation of therapeutic measures]. Hippokrates. 1978 Feb;49(1):97-100. No abstract available. German.

Drugs

Indications