C-reactive protein, interleukin-6, and prostate cancer risk in men aged 65 years and older.

Publication Type:

Journal Article

Source:

Cancer causes & control : CCC, Volume 20, Issue 7, p.1193-203 (2009)

Keywords:

2009, African Americans, Aged, Aged, 80 and over, Biological Markers, C-Reactive Protein, Center-Authored Paper, European Continental Ancestry Group, Humans, INFLAMMATION, Interleukin-6, Male, Polymorphism, Single Nucleotide, Prospective Studies, Prostatic Neoplasms, Public Health Sciences Division, Risk Factors

Abstract:

Inflammation is believed to play a role in prostate cancer (PCa) etiology, but it is unclear whether inflammatory markers C-reactive protein (CRP) and interleukin-6 (IL-6) associate with PCa risk in older men. Using Cox regression, we assessed the relationship between baseline concentrations of CRP and IL-6 and the subsequent PCa risk in the Cardiovascular Health Study, a population-based cohort study of mostly European American men of ages >64 years (n = 2,234; mean follow-up = 8.7 years; 215 incident PCa cases). We also tested associations between CRP and IL-6 tagSNPs and PCa risk, focusing on SNPs that are known to associate with circulating CRP and/or IL-6. Neither CRP nor IL-6 blood concentrations was associated with PCa risk. The C allele of IL-6 SNP rs1800795 (-174), a known functional variant, was associated with increased risk in a dominant model (HR = 1.44; 95% CI = 1.03-2.01; p = 0.03), but was not statistically significant after accounting for multiple tests (permutation p = 0.21). Our results suggest that circulating CRP and IL-6 do not influence PCa risk. SNPs at the CRP locus are not associated with PCa risk in this cohort, while the association between rs1800795 and PCa risk warrants further investigation.