Archives of Toxicology

, Volume 49, Issue 3–4, pp 265–273 | Cite as

Lipid peroxidation in isolated rat hepatocytes measured by ethane and n-pentane formation

  • N. de Ruiter
  • H. Ottenwälder
  • H. Muliawan
  • H. Kappus
Original Investigations

Abstract

Isolated rat hepatocytes (1×107 cells/ml) were aerobically incubated in Eagle's Minimum Essential Medium which contained 2.0% albumin. As potential parameters of lipid peroxidation ethane and n-pentane formed were measured in samples obtained from the gas phase above the incubation mixture. 15–30 nmol ethane or n-pentane were produced by 107 hepatocytes within 90 min. Carbon tetrachloride (CCl4) or ADP-complexed ferrous ions stimulated ethane and n-pentane formation considerably, depending on the concentrations of the compounds. With CCl4 107 cells formed max 180 nmol ethane and 140 nmol n-pentane within 90 min incubation, whereas with Fe(II) max 130 nmol ethane and 220 nmol n-pentane could be detected.

When n-pentane was added to the gas phase above the incubation mixture containing either medium or medium plus hepatocytes its amount decreased by 30% within the first 5 min of incubation. However, afterwards only minor amounts of n-pentane disappeared, even in the presence of hepatocytes. This indicates that n-pentane equilibrates with the cell suspension under the conditions used.

Cell viability, as determined by the release of lactate dehydrogenase into the medium and by the uptake of trypan blue by the cells, and the recovery of the cells decreased only in presence of relatively high concentrations of CCl4, or Fe(II) respectively. However, a maximal effect on ethane and n-pentane formation was reached already with lower concentration.

Key words

Isolated hepatocytes Carbon tetrachloride Ferrous ions Lipid peroxidation Ethane n-Pentane 

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Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • N. de Ruiter
    • 1
  • H. Ottenwälder
    • 1
  • H. Muliawan
    • 1
  • H. Kappus
    • 1
  1. 1.Abteilung für PharmakologieMedizinisches Institut für Umwelthygiene,Universität DüsseldorfDüsseldorf lGermany

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