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We have examined the relationship between serum insulin-like growth factor-I (IGF-I) and prostate-specific antigen in 367 healthy men without evidence of prostate cancer and found a positive association (P = 0.05). In men without prostate cancer, serum prostate-specific antigen is closely related to prostate size, and our findings, therefore, suggest that IGF-I may induce prostatic epithelial proliferation. Higher circulating levels of IGF-I have been associated with increased risk of both prostate cancer and possibly benign prostatic hyperplasia. Greater rates of cell proliferation induced by IGF-I may be a key biological pathway underlying these disorders.

Type

Journal article

Journal

Cancer Epidemiol Biomarkers Prev

Publication Date

01/2004

Volume

13

Pages

163 - 165

Keywords

Age Distribution, Aged, Humans, Insulin-Like Growth Factor I, Logistic Models, Male, Middle Aged, Prostate-Specific Antigen, Prostatic Hyperplasia