Prediagnostic plasma IGFBP-1, IGF-1 and risk of prostate cancer

Item Type:	Article
Title:	Prediagnostic plasma IGFBP-1, IGF-1 and risk of prostate cancer
Creators Name:	Cao, Y. and Nimptsch, K. and Shui, I.M. and Platz, E.A. and Wu, K. and Pollak, M.N. and Kenfield, S.A. and Stampfer, M.J. and Giovannucci, E.L.
Abstract:	Insulin-like growth factor (IGF)-1 is associated with a higher risk of prostate cancer. IGF-binding protein (IGFBP)-1, a marker for insulin activity, also binds IGF-1 and inhibits its action. Data on IGFBP-1 and prostate cancer risk are sparse and whether the IGF and insulin axes interact to affect prostate cancer carcinogenesis is unknown. We evaluated the independent and joint influence of prediagnostic plasma levels of IGFBP-1 (fasting) and IGF-1 on risk of prostate cancer among 957 cases and 1,021 controls with fasting levels of IGFBP-1 and 1,709 cases and 1,778 controls with IGF-1 nested within the Health Professionals Follow-up Study. Unconditional logistic regression adjusting for matching factors was used to estimate the odds ratio (OR) and 95% confidence interval (CI). Higher prediagnostic fasting IGFBP-1 levels were associated with lower risk of prostate cancer (highest vs. lowest quartile OR = 0.67, 95% CI 0.52-0.86, ptrend = 0.003), which remained similar after adjusting for IGF-1. Prediagnostic IGF-1 was associated with increased risk of prostate cancer (highest vs. lowest quartile OR = 1.28, 95% CI = 1.05-1.56, ptrend = 0.01). The associations with each marker were primarily driven by lower-grade and non-advanced prostate cancer. Being low in IGFBP-1 and high in IGF-1 did not confer appreciable additional risk (pinteraction = 0.42). In summary, prediagnostic fasting IGFBP-1 may influence prostate cancer carcinogenesis. Being low in IGFBP-1 or high in IGF-1 is sufficient to elevate the risk of prostate cancer.
Keywords:	IGFBP-1, IGF-1, Insulin, Prostate Cancer, Risk
Source:	International Journal of Cancer
ISSN:	0020-7136
Publisher:	Wiley
Volume:	136
Number:	10
Page Range:	2418-2426
Date:	15 May 2015
Additional Information:	Copyright © 2014 UICC
Official Publication:	https://doi.org/10.1002/ijc.29295
External Fulltext:	View full text on PubMed Central
PubMed:	View item in PubMed

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