Metabolism of the cinnamon constituent o-methoxycinnamaldehyde in the rat

Xenobiotica; the Fate of Foreign Compounds in Biological Systems
O B SamuelsenR R Scheline

Abstract

The metabolism of o-methoxycinnamaldehyde (1.3 mmol/kg, intragastrically) was studied in rats. Identification of the urinary metabolites by g.l.c.-mass spectrometry and quantification by h.p.l.c. showed that the major metabolic pathway (approx. two-thirds of the dose) was oxidation to the corresponding cinnamic and phenylpropionic acids (C6-C3 acids) which were largely excreted as glycine conjugates. Intermediate amounts (approx. 10% of the dose) of the O-demethylated C6-C3 acids were excreted. Relatively large amounts of the beta-hydroxylated phenylpropionic acid derivative were found, however only traces of the further products of beta-oxidation (2-methoxylated derivatives of benzoic and hippuric acid) were excreted. No evidence was obtained for conjugation of o-methoxycinnamaldehyde with glutathione. Urinary excretion of metabolites was rapid (91% in 24 h and 98% in 48 h).

References

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Citations

Dec 12, 2003·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Timothy B AdamsBernard M Wagner
Jul 3, 1998·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·T B AdamsR A Ford
May 19, 2009·Disease-a-month : DM·Donald G Barceloux
Jun 1, 1993·Xenobiotica; the Fate of Foreign Compounds in Biological Systems·J Jodynis-Liebert
Dec 25, 2004·Drug Metabolism and Pharmacokinetics·Atsushi HasegawaMitsukazu Kitada
Nov 24, 2007·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·UNKNOWN RIFM Expert PanelH Tagami

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