Plasma Insulin-Like Growth Factor-I and Prostate Cancer Risk: A Prospective Study

Author:

Chan June M.12345,Stampfer Meir J.12345,Giovannucci Edward12345,Gann Peter H.12345,Ma Jing12345,Wilkinson Peter12345,Hennekens Charles H.12345,Pollak Michael12345

Affiliation:

1. J. M. Chan and M. J. Stampfer, Department of Epidemiology, Harvard School of Public Health, 677 Huntington Avenue, Boston, MA 02115, USA.

2. E. Giovannucci and J. Ma, Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.

3. P. H. Gann, Department of Preventive Medicine, Northwestern University Medical School, Chicago, IL 60611, USA.

4. P. Wilkinson and M. Pollak, Cancer Prevention Research Unit, Departments of Medicine and Oncology, Lady Davis Research Institute of the Jewish General Hospital and McGill University, Montreal, Canada H3T1E2.

5. C. H. Hennekens, Division of Preventive Medicine, Department of Medicine and Department of Ambulatory Care and Prevention, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.

Abstract

Insulin-like growth factor–I (IGF-I) is a mitogen for prostate epithelial cells. To investigate associations between plasma IGF levels and prostate cancer risk, a nested case-control study within the Physicians' Health Study was conducted on prospectively collected plasma from 152 cases and 152 controls. A strong positive association was observed between IGF-I levels and prostate cancer risk. Men in the highest quartile of IGF-I levels had a relative risk of 4.3 (95 percent confidence interval 1.8 to 10.6) compared with men in the lowest quartile. This association was independent of baseline prostate-specific antigen levels. Identification of plasma IGF-I as a predictor of prostate cancer risk may have implications for risk reduction and treatment.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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