Hepatic ethanol metabolism is mediated predominantly by catalase‐H2O2 in the fasted state

FEBS Letters

Handler, Jeffrey A.¹  Thurman, Ronald G.¹ 

[1] Department of Pharmacology, CB no. 7365, Faculty Laboratory Office Building, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7365, USA

关键词: Ethanol metabolism;    Catalase;    Alcohol dehydrogenase;    Alcohol oxidation;    (Liver);   

DOI  :  10.1016/0014-5793(88)80243-6

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Methanol and butanol were employed as selective substrates for catalase-H₂O₂ and alcohol dehydrogenase (ADH), respectively, in the perfused rat liver. As expected, rates of butanol metabolism accounted for over 85% of overall rates of alcohol oxidation indicating that ADH was the predominant pathway of alcohol metabolism in both the fed or fasted state in the absence of added substrate. In the fasted state, however, addition of oleate (1 mM) diminished butanol oxidation 20–25% yet increased rates of methanol oxidation over 4-fold. Under these conditions, methanol uptake accounted for nearly two-thirds of overall rates of alcohol oxidation. These data demonstrate that catalase-H₂O₂ is the predominant pathway of alcohol oxidation in the fasted state in the presence of fatty acids. Accordingly, it is concluded that diet and nutritional state play important roles in the contribution of the ADH and catalase pathways to alcohol oxidation.

【 授权许可】

Unknown