Insulin-like growth factor I, insulin-like growth factor binding protein 3, and urologic measures of benign prostatic hyperplasia

Am J Epidemiol. 2003 May 1;157(9):784-91. doi: 10.1093/aje/kwf054.

Abstract

Laboratory studies suggest that insulin-like growth factor I (IGF-I) promotes prostatic growth. The authors evaluated the association between benign prostatic hyperplasia and IGF-I and its binding protein IGFBP-3 in community-dwelling men to determine whether this laboratory finding is manifest at the population level. Participants (n = 471) were Olmsted County, Minnesota, Caucasian males aged 40-79 years in 1990. Urologic measures were assessed from the International Prostate Symptom Score, peak urinary flow rates, prostate volume, and serum prostate-specific antigen (PSA), and serum IGF-I and IGFBP-3 levels were measured. After adjustment for age, the relative odds (odds ratios) of an abnormal urologic measure in men with high versus low serum IGF-I levels were 0.98 (95% confidence interval (CI): 0.66, 1.45) for a symptom score of >7, 1.14 (95% CI: 0.72, 1.80) for a peak urinary flow rate of <12 ml/second, 1.11 (95% CI: 0.72, 1.72) for a prostate volume of >30 ml, and 0.71 (95% CI: 0.46, 1.09) for a PSA level of >1.4 ng/ml. A low IGFBP-3 level was associated with an enlarged prostate (odds ratio = 1.72, 95% CI: 1.05, 2.82), after simultaneous adjustment for IGF-I and age, but not with other urologic measures. These data do not provide evidence for an association between benign prostatic hyperplasia and serum IGF-I.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adult
  • Age Distribution
  • Age Factors
  • Aged
  • Cohort Studies
  • Cross-Sectional Studies
  • Humans
  • Insulin-Like Growth Factor Binding Protein 3 / blood*
  • Insulin-Like Growth Factor I / metabolism*
  • Longitudinal Studies
  • Male
  • Middle Aged
  • Minnesota / epidemiology
  • Prostate-Specific Antigen / blood
  • Prostatic Hyperplasia / blood*
  • Prostatic Hyperplasia / epidemiology*
  • Prostatic Hyperplasia / etiology
  • Prostatic Hyperplasia / pathology
  • Random Allocation
  • Surveys and Questionnaires

Substances

  • Insulin-Like Growth Factor Binding Protein 3
  • Insulin-Like Growth Factor I
  • Prostate-Specific Antigen