Plasma Metabolomic Profiles and Risk of Advanced and Fatal Prostate Cancer

前列腺癌 医学 内科学 代谢组学 肿瘤科 癌症 前列腺 生物信息学 生物
作者
Ying Wang,Eric J. Jacobs,Brian D. Carter,Susan M. Gapstur,Victoria L. Stevens
出处
期刊:European Urology Oncology [Elsevier BV]
卷期号:4 (1): 56-65 被引量:24
标识
DOI:10.1016/j.euo.2019.07.005
摘要

Little is known about the underlying molecular mechanisms of prostate cancer, especially advanced and fatal prostate cancer. To examine associations of prediagnostic plasma metabolomic profiles with advanced and fatal prostate cancer. In a case-cohort study of the Cancer Prevention Study-II Nutrition Cohort, of 14 210 cancer-free men with a blood sample in 1998–2001, 129 were diagnosed with advanced prostate cancer (T3-T4 or N1 or M1) through June 2013 and 112 died from prostate cancer through December 2014. Plasma samples from advanced and fatal cases, and a randomly selected subcohort of 347 men were metabolically profiled using untargeted mass spectroscopy–based platforms. Prentice-weighted Cox proportional hazards regression models were used to assess associations of 699 known metabolites with advanced and fatal prostate cancer. Two metabolites derived from fatty acid metabolism (ethylmalonate and butyrylcarnitine), aspartate, sphingomyelin (d18:1/18:0), and two γ-glutamyl amino acids (γ-glutamylmethionine and γ-glutamylglutamine) were statistically significantly associated (false discovery rate <0.2) with fatal prostate cancer. One standard deviation (SD) increase in each γ-glutamyl amino acid was associated with 34–38% decreased risk, whereas one SD increase in each of the other metabolites was associated with 45–53% increased risk. A metabolic risk score based on four of these metabolites (excluding butyrylcarnitine and γ-glutamylglutamine, which were not independent predictors) was strongly associated with fatal prostate cancer (relative risk per SD: 2.72, 95% confidence interval: 2.05–3.60). No metabolites were statistically significantly associated with advanced prostate cancer. These results were observational and may not be causal. These findings identified metabolic pathways that are altered in the development of fatal prostate cancer. Further research into these pathways may provide insights into the etiology of fatal prostate cancer. In a large follow-up study of cancer-free men, those with a certain metabolomic profile had a higher risk of dying from prostate cancer.
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