Consumption of cruciferous vegetables (CVs) is inversely correlated to many human diseases including cancer (breast, lung, and bladder), diabetes, cardiovascular and neurological disease.
Presently, there are no readily measureable biomarkers of CV consumption and intake of CVs has relied on dietary recall. Here, biomarkers of CV intake were identified in the urine of 20 healthy Caucasian adult males using 1H-NMR spectroscopy with multivariate statistical modeling. The study was separated into three phases of 14 days: a run-in period with restricted CV consumption (phase I); a high CV phase where participants consumed 250g/day of both broccoli and Brussels sprouts (phase II); a wash-out phase with a return to restricted CV consumption (phase III). Each study participant provided a complete cumulative urine collection over 48 hours at the end of each phase; a spot urine (U0), 0-10 hours (U0-10), 10-24 hours (U10-24) and 24-48 hours (U24-48) urine samples. Urine samples obtained after consumption of CV were differentiated from low CV diet samples by 4 singlet 1H-NMR spectroscopic peaks, two of which were identified as S-methyl-L-cysteine sulphoxide (SMCSO) and N-acetyl-S-methyl-L-cysteine sulphoxide (NAc-SMCSO). These stable urinary biomarkers of CV consumption will facilitate future assessment of CV in nutritional population screening and dietary intervention studies and may correlate to population health outcomes.
Written by:
Edmands WM, Beckonert O, Stella C, Campbell A, Lake B, Lindon JC, Holmes E, Gooderham NJ. Are you the author?
Reference: J Proteome Res. 2011 Jul 19. Epub ahead of print.
doi: 10.1021/pr200326k
PubMed Abstract
PMID: 21770373
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