{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,16]],"date-time":"2025-10-16T20:09:02Z","timestamp":1760645342226,"version":"3.30.0"},"reference-count":44,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"3","license":[{"start":{"date-parts":[[2015,9,1]],"date-time":"2015-09-01T00:00:00Z","timestamp":1441065600000},"content-version":"tdm","delay-in-days":7854,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[1994,3]]},"abstract":"<jats:sec>\n            <jats:title\/>\n            <jats:p>The Long-Evans Cinnamon rat is a mutant strain that contracts hereditary hepatitis and, eventually, spontaneous hepatoma. Recently, abnormal copper accumulations in Long-Evans Cinnamon rat livers were shown to be genetically linked to the development of hepatitis. Because reduced glutathione and glutathione-related enzymes are known to play important roles in cellular resistance to transition metal toxicity, we determined the levels of reduced glutathione and glutathione-related enzymes in seven different tissues of Long-Evans Cinnamon and control Long-Evans Agouti rats. Of the enzymes examined, only hepatic glutathione peroxidase was markedly decreased in Long-Evans Cinnamon rats. Glutathione peroxidase content in the liver of Long-Evans Cinnamon rats was 39%, 53% and 58% of the control values at 9 (normal stage), 19 (acute hepatitis stage) and 27 (chronic hepatitis stage) wk of age, respectively. Northern-blot analysis revealed that messenger RNA levels of glutathione peroxidase in the livers of Long-Evans Cinnamon rats were about 40% of the control levels. The activity of glutathione S-transferase was slightly decreased in the livers of Long-Evans Cinnamon rats. These data suggest that the liver of the Long-Evans Cinnamon rat is poorly protected against active oxygen species, the production of which is enhanced in the presence of excess copper. Glutathione-reductase activity in the livers of Long-Evans Cinnamon rats increased to 166% and 148% of the control levels at 19 and 27 wk of age, respectively. No significant changes were observed in the activity of \u03b3-glutamylcysteine synthetase or in the content of total reduced glutathione in the liver of the Long-Evans Cinnamon rat. The changes in activity of glutathione peroxidase and glutathione reductase in the Long-Evans Cinnamon rat livers resembled those observed during chemical hepatocarcinogenesis. (Hepatology 1994;19:694-700).<\/jats:p>\n          <\/jats:sec>","DOI":"10.1002\/hep.1840190322","type":"journal-article","created":{"date-parts":[[2007,3,4]],"date-time":"2007-03-04T02:47:11Z","timestamp":1172976431000},"page":"694-700","update-policy":"http:\/\/dx.doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":12,"title":["Decreased expression of liver glutathione peroxidase in Long-Evans cinnamon mutant rats predisposed to hepatitis and 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