First chemical synthesis and in vitro characterization of the potential human metabolites 5-O-feruloylquinic acid 4'-sulfate and 4'-O-glucuronide

Candice Menozzi-Smarrito, Chi Chun Wong, Walter Meinl, Hansruedi Glatt, Rene Fumeaux, Caroline Munari, Fabien Robert, Gary Williamson, Denis Barron

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16 Citations (Scopus)


Feruloylquinic acids are a major class of biologically active phenolic antioxidants in coffee beans, but their metabolic fate is poorly understood. The present study investigated the phase II metabolism of feruloylquinic acids with selected human sulfotransferases (SULT1A1 and SULT1E1) and uridine 5'-diphosphoglucuronosyltransferases (UGT1A1 and UGT1A9). For unequivocal metabolite identification, the chemical synthesis of two potential human metabolites of 5-O-feruloylquinic acid, the 4'-sulfated and 4'-O-glucuronidated conjugates, has been performed for the first time. Following incubation with human SULT1A1 or SULT1E1, formation of 5-O-feruloylquinic acid 4'-O-sulfate was confirmed by matching its HPLC and MS data with those of the authentic standard. On the other hand, no glucuronide conjugates were detected after incubation with human uridine 5'-diphosphoglucuronosyltransferases. These results suggest that sulfation can take place on the ferulic acid moiety of feruloylquinic acids and may be a major metabolic pathway for feruloylquinic acids in humans.

Original languageEnglish
Pages (from-to)5671-5676
Number of pages6
JournalJournal of Agricultural and Food Chemistry
Issue number10
Publication statusPublished - 25 May 2011
Externally publishedYes


  • Coffee
  • Feruloylquinic acid glucuronide
  • Feruloylquinic acid sulfate
  • Human metabolites
  • Sulfotransferase
  • Synthesis

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