A readout of metabolic efficiency in arylamine N-acetyltransferase-deficient mice reveals minor energy metabolism changes

FEBS Lett. 2019 Apr;593(8):831-841. doi: 10.1002/1873-3468.13357. Epub 2019 Mar 22.


Recent studies have revealed a possible link between the activities of polymorphic arylamine N-acetyltransferases (NATs) and energy metabolism. We used a Nat1/Nat2 double knockout (KO) mouse model to demonstrate that ablation of the two Nat genes is associated with modest, intermittent alterations in respiratory exchange rate. Pyruvate tolerance tests show that double KO mice have attenuated hepatic gluconeogenesis when maintained on a high-fat/high-sucrose diet. Absence of the two Nat genes also leads to an increase in the hepatic concentration of coenzyme A in mice fed a high-fat/high-sucrose diet. Our results suggest a modest involvement of NAT in energy metabolism in mice, which is consistent with the absence of major phenotypic deregulation of energy metabolism in slow human acetylators.

Keywords: acetyl-CoA; arylamine N-acetyltransferase; drug-metabolizing enzyme; energy metabolism; fatty acids.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Arylamine N-Acetyltransferase / deficiency*
  • Arylamine N-Acetyltransferase / genetics*
  • Coenzyme A / metabolism
  • Diet, High-Fat / adverse effects
  • Energy Metabolism / genetics*
  • Gene Knockout Techniques
  • Gluconeogenesis / genetics
  • Humans
  • Liver / metabolism
  • Mice


  • Arylamine N-Acetyltransferase
  • Coenzyme A