Liver phosphatidylcholine hydroperoxidation provoked by ethionine-containing choline-deficient diet in mice

Lucia Satiko Yoshida, Teruo Miyazawa, Kenshiro Fujimoto, Takashi Kaneda

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

It is shown that peroxidation of phosphatidylcholine (PC) is enhanced in liver of mice fed a hepatocarcinogenic choline-deficient diet containing 0.1% w/w ethionine. Mice were divided into 4 groups and fed for 3 weeks one of the following diets: choline-supplemented; choline-supplemented containing ethionine; choline-deficient; and choline-deficient containing ethionine. Phosphatidylcholine hydroperoxide (PCOOH) of liver lipids was measured by high performance liquid chromatography using a chemiluminescence detector. Mice fed a choline-deficient diet containing ethionine showed 6-fold higher PCOOH levels than the choline-supplemented control mice: the PCOOH/PC molar ratios of liver lipids were 32.3×10-5 and 5.6×10-5, respectively. In addition to this remarkable degree of lipid peroxidation in liver of mice fed the choline-deficient diet containing ethionine, we also observed a significant liver fatty infiltration, a decrease in plasma and liver α-tocopherol, and an increase in liver injury-indicative enzyme activities. Also, marker enzymes for hepatocarcinogenesis, glucose-6-phosphatase and γ-glutamyl transpeptidase were affected. These data suggest that enhanced hydroperoxidation of phosphatidylcholine may participate in hepatocarcinogenesis provoked by choline deficiency in the presence of ethionine.

Original languageEnglish
Pages (from-to)565-569
Number of pages5
JournalLipids
Volume25
Issue number9
DOIs
Publication statusPublished - 1990 Sep 1

ASJC Scopus subject areas

  • Biochemistry
  • Organic Chemistry
  • Cell Biology

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