Species Differences in in vitro and Estimated in vivo Kinetics for Intestinal Microbiota Mediated Metabolism of Acetyl-deoxynivalenols

Jing Jin, Albertus Spenkelink, Karsten Beekmann, Marta Baccaro, Fuguo Xing*, Ivonne M.C.M. Rietjens

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)


Scope: Deoxynivalenol (DON) and its acetylated derivatives 3-acetyl-DON (3-Ac-DON) and 15-acetyl-DON (15-Ac-DON) are important mycotoxins of concern in the modern food chain. Methods and Results: The present study reveals that the rate of de-acetylation in in vitro anaerobic fecal incubations decreased in the order rat > mouse > human > pig for 3-Ac-DON, and mouse > human > rat > pig for 15-Ac-DON. The ratio between the de-acetylation rate of 3-Ac-DON and 15-Ac-DON varies with the species. Scaling of the kinetic parameters to the in vivo situation results in catalytic efficiencies decreasing in the order human > rat > pig > mouse for 3-Ac-DON and human > pig > rat > mouse for 15-Ac-DON. The results obtained indicate that in mice, 3-Ac-DON can be fully deconjugated while 15-Ac-DON cannot. In rats, pigs, and humans, both 3-Ac-DON and 15-Ac-DON can be totally transformed by gut fecal microbiota during the estimated intestinal residence time. A correlation analysis between the deacetylation rate and the relative abundance of the microbiome suggests Lachnospiraceae may be involved in the deacetylation process. Conclusion: It is concluded that interspecies differences in deacetylation of acetylated DONs exist but that in risk assessment assumption of complete intestinal deconjugation provides an adequate approach.

Original languageEnglish
Article number2001085
JournalMolecular Nutrition and Food Research
Issue number9
Early online date26 Feb 2021
Publication statusPublished - 2021


  • acetyl-DONs
  • de-acetylation
  • gut microbiota
  • kinetics


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