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Absorption of dimethoxycinnamic acid derivatives in vitro and pharmacokinetic profile in human plasma following coffee consumption

AuthorsFarrell, Tracy L.; Gómez Juaristi, Miren ; Poquet, L.; Redeuil, K.; Nagy, K.; Renouf, M.; Williamson, G.
Caco-2 cells
Human plasma
Phenolic acids
Issue Date2012
PublisherJohn Wiley & Sons
CitationMolecular Nutrition and Food Research 56: 1413- 1423 (2012)
AbstractScope: This study reports the 24 h human plasma pharmacokinetics of 3,4-dimethoxycinnamic acid (dimethoxycinnamic acid) after consumption of coffee, and the membrane transport characteristics of certain dimethoxycinnamic acid derivatives, as present in coffee. Methods and results: Eight healthy human volunteers consumed a low-polyphenol diet for 24 h before drinking 400 mL of commercially available coffee. Plasma samples were collected over 24 h and analyzed by HPLC-MS 2. Investigation of the mechanism of absorption and metabolism was performed using an intestinal Caco-2 cell model. For the first time, we show that dimethoxycinnamic acid appears in plasma as the free aglycone. The time to reach the C max value of approximately 0.5 μM was rapid, T max = 30 min, and showed an additional peak at 2-4 h for several subjects. In contrast, smaller amounts of dimethoxy-dihydrocinnamic acid (C max ∼ 0.1 μM) peaked between 8 and 12 h after coffee intake. In the cell model, dimethoxycinnamic acid was preferentially transported in the free form by passive diffusion, and a small amount of dimethoxycinnamoylquinic acid hydrolysis was observed. Conclusion: These findings show that dimethoxycinnamic acid, previously identified in plasma after coffee consumption, was rapidly absorbed in the free form most likely by passive diffusion in the upper gastrointestinal tract. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Identifiersdoi: 10.1002/mnfr.201200021
issn: 1613-4125
Appears in Collections:(ICTAN) Artículos
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