Changes in Microsomal Phospholipases and Arachidonic Acid in Experimental Alcoholic Liver Injury: Relationship to Cytochrome P‐450 2E1 Induction and Conjugated Diene Formation

Amin A. Nanji, Shuping Zhao, Robert G. Lamb, S. M.Hossein Sadrzadeh, Andrew J. Dannenberg, David J. Waxman

Research output: Contribution to journalArticle

51 Scopus citations

Abstract

We evaluated the role of changes in microsomal phospholipases (A and C) and arachidonic acid in the intragastric rat feeding model. The experimental animals (male Wistar rats), divided into 4-5 rats/group, were fed the following diets: corn oil and ethanol and corn oil plus dextrose. One set of groups was killed after 2 weeks of feeding, and the second set was killed after 1 month. For each animal, microsomal analysis of cytochrome P-450 2E1 (CYP 2E1) and fatty acids was done. Fourteen animals had analyses of phospholipase C (PLC) and phospholipase A (PLA), and 10 animals had measurements of conjugated dienes. A significant correlation was obtained between the level of CYP 2E1 and the decrease in arachidonic acid (AA) from baseline levels (r = 0.69, p < 0.01). The decrease in AA also correlated with the increase in conjugated dienes (r = 0.70, p < 0.05). PLA and PLC activities were both significantly increased in the corn oil and ethanol groups. The activity of PLC correlated with the decline in AA (r = 0.69, p < 0.01). The correlations noted between the decrease in microsomal AA and CYP 2E1 induction and conjugated diene formation suggest that these processes may be interlinked especially in regard to generation of lipid peroxides that may play a role in alcoholic liver injury.

Original languageEnglish (US)
Pages (from-to)598-603
Number of pages6
JournalAlcoholism: Clinical and Experimental Research
Volume17
Issue number3
DOIs
StatePublished - Jun 1993

Keywords

  • Arachidonic Acid
  • Cytochrome P-450 2E1
  • Ethanol
  • Lipid Peroxidation
  • Phospholipase

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Toxicology

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