PMID- 8574334 OWN - NLM STAT- MEDLINE DCOM- 19960312 LR - 20190920 IS - 0944-1174 (Print) IS - 0944-1174 (Linking) VI - 30 IP - 5 DP - 1995 Oct TI - Changes in free radical-metabolizing enzymes and lipid peroxides in the liver of Long-Evans with cinnamon-like coat color rats. PG - 619-23 AB - We report changes in free radical-metabolizing enzymes and the increased generation of lipid peroxides associated with extreme metal accumulation in the liver of the Long-Evans with cinnamon-like coat color (LEC) rat, a new mutant strain displaying hereditary hepatitis and subsequent hepatocellular carcinoma. The activity of free radical-metabolizing enzymes and lipid peroxides, and the concentration of metal in the liver were determined sequentially after birth. Mn-superoxide dismutase activity significantly increased immediately after the onset of hepatitis in LEC rats, whereas no remarkable change was observed in control rats. Cu, Zn-superoxide dismutase activity in LEC rats was similar to that in control rats. Glutathione reductase activity increased, while glutathione peroxidase activity was lower in LEC rats than in control rats throughout the observation periods. Lipid peroxides, estimated by thiobarbituric acid reaction, also increased 4- to 5-fold immediately after the onset of hepatitis in LEC rats. Copper concentration was 30- to 50-fold higher in the liver of LEC rats than in control rats, and the iron content also increased significantly before and after the onset of hepatitis. These findings suggested that an oxidant injury generated by toxic metals could be one of the factors responsible for hepatocellular damage in this unique hereditary hepatitis. FAU - Ohhira, M AU - Ohhira M AD - Third Department of Internal Medicine, Asahikawa Medical College, Hokkaido, Japan. FAU - Ono, M AU - Ono M FAU - Ohhira, M AU - Ohhira M FAU - Sekiya, C AU - Sekiya C FAU - Namiki, M AU - Namiki M FAU - Fujimoto, Y AU - Fujimoto Y FAU - Nagao, M AU - Nagao M FAU - Mori, M AU - Mori M LA - eng PT - Journal Article PL - Japan TA - J Gastroenterol JT - Journal of gastroenterology JID - 9430794 RN - 0 (Lipid Peroxides) RN - 789U1901C5 (Copper) RN - E1UOL152H7 (Iron) RN - EC 1.- (Oxidoreductases) SB - IM MH - Analysis of Variance MH - Animals MH - Copper/metabolism MH - Hepatitis, Animal/*metabolism MH - Iron/metabolism MH - Lipid Peroxides/*metabolism MH - Male MH - Oxidoreductases/*metabolism MH - Rats MH - Rats, Mutant Strains EDAT- 1995/10/01 00:00 MHDA- 1995/10/01 00:01 CRDT- 1995/10/01 00:00 PHST- 1995/10/01 00:00 [pubmed] PHST- 1995/10/01 00:01 [medline] PHST- 1995/10/01 00:00 [entrez] AID - 10.1007/BF02367788 [doi] PST - ppublish SO - J Gastroenterol. 1995 Oct;30(5):619-23. doi: 10.1007/BF02367788.