A prospective study of serum C-reactive protein and colorectal cancer risk in men.
Chronic inflammation has been implicated in the etiology of colorectal cancer. C-reactive protein (CRP), a sensitive marker of inflammation, has been investigated with regard to colorectal cancer in only three previous studies, and the results from these investigations were inconsistent. We examined serum CRP levels in relation to colorectal cancer incidence in a nested case-control study within the Alpha Tocopherol, Beta-Carotene (ATBC) Cancer Prevention Study, a cohort of 29,133 Finnish males enrolled from 1985 to 1988 with follow-up through April 2002. Colorectal cancer cases were ascertained by the Finnish Cancer Registry; this analysis included 130 cases of colorectal cancer (with available blood), which occurred between 1990 and April 30, 2002, and 260 matched controls. Baseline median CRP levels were approximately 25% higher among colorectal cancer cases (3.4 mg/L) than controls (2.6 mg/L; P = 0.04). Relative to men in the lowest quartile of CRP concentration, men in the highest quartile had an odds ratio of 2.9 (95% confidence interval, 1.4-6.0) for developing colorectal cancer with a dose-response relationship supported (P(trend) = 0.006). The relation between CRP and incident colorectal cancer was modified by body mass index such that the association was stronger among lean individuals than in heavier individuals (P(interaction) = 0.018). These results support the notion that chronic low-grade inflammation is a marker for increased risk of colorectal cancer.
Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Department of Health and Human Services, Rockville, Maryland 20852, USA. gunterm@mail.nih.gov
Marc J
MJ
Gunter
Rachael
R
Stolzenberg-Solomon
Amanda J
AJ
Cross
Michael F
MF
Leitzmann
Stephanie
S
Weinstein
Richard J
RJ
Wood
Jarmo
J
Virtamo
Philip R
PR
Taylor
Demetrius
D
Albanes
Rashmi
R
Sinha
D015992:Body Mass Index; D002097:C-Reactive Protein / Q000378:metabolism*; D015179:Colorectal Neoplasms / Q000097:blood*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012307:Risk Factors
D002097:C-Reactive Protein