Alcohol-induced suppression of gluconeogenesis is greater in ethanol fed female rat hepatocytes than males

Ken D. Sumida, Alma A. Cogger, Aleksey V. Matveyenko

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

The impact of alcohol-induced suppression on hepatic gluconeogenesis (HGN) after chronic ethanol consumption between males and females is unknown. To determine the effects of chronic alcohol consumption (8 weeks) on HGN, the isolated hepatocyte technique was used on 24 h fasted male and female Wistar rats. Livers were initially perfused with collagenase and the hepatocytes were isolated. Aliquots of the cell suspension were placed in Krebs-Henseleit buffer and incubated for 30 min with lactate, [U-14C]lactate, and nine different concentrations of ethanol (EtOH). Dose-effect curves were generated for the determination of maximal and half-maximal alcohol-induced inhibition on HGN. There was no significant difference in HGN (lactate only and no EtOH) between males and females fed the control diet (88.5 ± 5.1 nmol/mg protein/30 min). Similarly, the HGN (lactate only and no EtOH) in males fed the ethanol diet (ME) were not significantly different (82.8 ± 3.5 nmol/mg protein/30 min) compared to controls. In contrast, the females chronically fed the ethanol diet (FE) had significantly (P < .05) lower HGN (67.8 ± 4.6 nmol/mg protein/30 min) compared to both ME and controls. With alcohol in the incubation medium, the HGN significantly (P < .05) declined in all groups. While alcohol suppressed HGN to a larger (P < .05) extent in ME (45.8 ± 3.7 nmol/mg protein/30 min) compared to controls (64.0 ± 3.8 nmol/mg protein/30 min), the inhibition was even greater (P < .05) in FE (32.7 ± 3.2 nmol/mg protein/30 min). The more pronounced effect of chronic alcohol consumption on HGN in the presence of ethanol in female hepatocytes was supported by the concomitant decreases (P < .05) in 14C-lactate incorporation into 14C-glucose, lactate uptake, and 14C-lactate uptake. The results suggest that chronic alcohol consumption elicits a greater reduction on HGN in the presence of ethanol in the hepatocytes of females compared to males.

Original languageEnglish (US)
Pages (from-to)67-75
Number of pages9
JournalAlcohol
Volume41
Issue number2
DOIs
StatePublished - Mar 2007

Keywords

  • C-glucose
  • Wistar rats
  • [U-C]lactate

ASJC Scopus subject areas

  • Health(social science)
  • Biochemistry
  • Toxicology
  • Neurology
  • Behavioral Neuroscience

Fingerprint Dive into the research topics of 'Alcohol-induced suppression of gluconeogenesis is greater in ethanol fed female rat hepatocytes than males'. Together they form a unique fingerprint.

  • Cite this