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A prospective study of serum metabolites and colorectal cancer risk
Author(s) -
Cross Amanda J.,
Moore Steven C.,
Boca Simina,
Huang WenYi,
Xiong Xiaoqin,
StolzenbergSolomon Rachael,
Sinha Rashmi,
Sampson Joshua N.
Publication year - 2014
Publication title -
cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.052
H-Index - 304
eISSN - 1097-0142
pISSN - 0008-543X
DOI - 10.1002/cncr.28799
Subject(s) - medicine , colorectal cancer , odds ratio , confidence interval , cancer , oncology , logistic regression , prospective cohort study , rectum , percentile , gastroenterology , statistics , mathematics
BACKGROUND Colorectal cancer is highly prevalent, and the vast majority of cases are thought to be sporadic, although few risk factors have been identified. Using metabolomics technology, our aim was to identify biomarkers prospectively associated with colorectal cancer. METHODS This study included 254 incident colorectal cancers and 254 matched controls nested in the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial. Serum samples were collected at baseline, and the mean length of follow‐up was 8 years. Serum metabolites were analyzed by ultra‐high performance liquid‐phase chromatography with tandem mass spectrometry, and gas chromatography coupled with mass spectrometry. Conditional logistic regression was used to calculate odds ratios (OR) and 95% confidence intervals (CI) for metabolites above the limit of detection and present in at least 80% of participants. RESULTS A total of 676 serum metabolites were measured; of these, 447 were of known identity and 278 of these were present in >80% of individuals. Overall, there was no association between serum metabolites and colorectal cancer; however, some suggestive associations were observed between individual metabolites and colorectal cancer but none reached statistical significance after Bonferroni correction for multiple comparisons. For example, leucyl‐leucine was inversely associated (OR comparing the 90th to the 10th percentile = 0.50; 95% CI = 0.32‐0.80; P = .003). In sex‐stratified analyses, serum glycochenodeoxycholate was positively associated with colorectal cancer among women (OR 90th vs.10th percentile = 5.34; 95% CI = 2.09‐13.68; P = .0001). CONCLUSIONS No overall associations were observed between serum metabolites and colorectal cancer, but serum glycochenodeoxycholate, a bile acid metabolite, was positively associated with colorectal cancer among women. Cancer 2014;120:3049–3057. © 2014 American Cancer Society .