期刊
MOLECULAR NUTRITION & FOOD RESEARCH
卷 58, 期 6, 页码 1199-1211出版社
WILEY
DOI: 10.1002/mnfr.201300931
关键词
Clinical trial; Colon cancer; Ellagic acid; Pomegranate; Urolithins
资金
- MINECO, Spain [CICYT-AGL2011-22447]
- Fun-C-Food [CSD2007-00063]
- Consolider Ingenio [CSD2007-00063]
- BACCHUS (FP7 European Commission) [312090]
- FPI from MINECO (Spain)
- 'Juan de la Cierva' from MINECO (Spain)
- JAE-DOC from Consejo Superior de Investigaciones Cientificas (CSIC, Spain) by the Eurpean Social Fund (ESF)
- National Health Service from 'Carlos III Health Institute' (ISCIII, Spain)
Scope: Urolithins are bioactive metabolites produced by the gut microbiota from ellagitannins (ETs) and ellagic acid (EA). We investigated whether urolithins could be detected in colon tissues from colorectal cancer (CRC) patients after pomegranate extract (PE) intake. Methods and results: CRC patients (n = 52) were divided into controls and PEs consumers (900 mg/day for 15 days) before surgical resection. PEs with low (PE-1) and high (PE-2) punicalagin: EA ratio were administered. Twenty-three metabolites, but no ellagitannins, were detected in urine, plasma, normal (NT) or malignant (MT) colon tissues using UPLC-ESI-QTOF-MS/MS (UPLC, ultra performance liquid chromatography; QTOF, quadrupole TOF). Free EA, five EA conjugates, gallic acid and 12 urolithin derivatives were found in colon tissues. Individual and total metabolites levels were higher in NT than in MT, independently of the PE consumed. The maximal mean concentration (1671 +/- 367 ng/g) was found in NT after consumption of PE-1 and the lowest concentration (42.4 +/- 10.2 ng/g) inMT with PE-2. Urolithin A or isourolithin A were the main urolithins produced (54 and 46% patients with urolithin A or isourolithin A phenotype, respectively). High punicalagin content (PE-2) hampered urolithins formation. Conclusion: Significant levels of EA derivatives and urolithins are found in human colon tissues from CRC patients after consumption of pomegranate. Further studies are warranted to elucidate their biological activity.
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