PMID: 3767035Oct 1, 1986Paper

Energy deficits in hepatocytes isolated from phenobarbital-treated or fasted rats and briefly exposed to halothane and hypoxia in vitro

Anesthesiology
G L BeckerR F Albrecht

Abstract

Experimental factors implicated in the pathogenesis of halothane hepatotoxicity in the phenobarbital-hypoxia rat model were examined for direct effects on the energy status of isolated rat liver cells in vitro. Intact hepatocytes were isolated after collagenase perfusion of livers of adult male Fischer 344 rats previously treated with phenobarbital (0.1% in drinking water for 5-7 days) and/or deprived of food for 48 h. Cells were incubated in Krebs-Henseleit buffer + substrates for 10 min at steady states of energy metabolism, with extracellular PO2 constant at 32, 16, or 4 mmHg +/- 1% halothane. Fasting produced the largest energy deficits in incubated hepatocytes, regardless of phenobarbital treatment status, PO2 value, or presence/absence of halothane. The combination of hypoxic PO2 (4 mmHg) and 1% halothane shifted lactate metabolism toward lactate production, whereas hypoxia or halothane alone did not. Prior phenobarbital treatment plus hypoxia decreased adenosine triphosphate/adenosine diphosphate (ATP/ADP) and increased lactate production compared with drug treatment or hypoxia alone. We conclude that pathogenic factors that interact to produce halothane hepatotoxicity act directly and jointly on isolated liver cells to ...Continue Reading

Citations

Sep 1, 1992·Hepatology : Official Journal of the American Association for the Study of Liver Diseases·S K KimJ H Southard
Jul 2, 2005·World Journal of Gastroenterology : WJG·Quan LiJun-Hua Lu

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