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Energy metabolism and regeneration in transgenic mouse liver expressing creatine kinase after major hepatectomy. 1996

S Satoh, and A Tanaka, and E Hatano, and T Inomoto, and S Iwata, and T Kitai, and H Shinohara, and S Tsunekawa, and B Chance, and Y Yamaoka
Second Department of Surgery, Faculty of Medicine, Kyoto University, Japan.

OBJECTIVE The catalysis of a creatinine/phosphocreatine system by creatine kinase is not expressed in the liver. The aim of this study was to examine the energy energy metabolism and regeneration after hepatectomy using transgenic mouse liver expressing creatine kinase to clarify the effects of phosphocreatine on liver regeneration. METHODS Transgenic mice were divided into two groups: group 1 was fed normal chow, and group 2 was fed 10% creatine chow for 5 days. Hepatic energy metabolism was evaluated before and after hepatectomies. Changes in remnant liver weight gain and bromodeoxyuridine labeling index were measured after 70% and 80% hepatectomies. RESULTS Hepatic adenosine triphosphate level 24 hours after 70% hepatectomy was significantly higher in group 2 than group 1 (P<0.05). In group 2, mitochondrial adenosine triphosphate synthesis was enhanced because of elevated intramitochondrial adenine nucleotide content before hepatectomy, leading to sufficient adenosine triphosphate synthesis after a 70% hepatectomy. Bromodeoxyuridine DNA labeling index 24 hours after a 70% hepatectomy was significantly higher in group 2 than group 1. Rapid liver weight gain was observed in group 2 after a 70% hepatectomy. CONCLUSIONS Abundant phosphocreatine promotes liver regeneration by reinforced hepatic energy metabolism. Gene transfer of creatine kinase to the liver may be a potential method in liver surgery.

UI MeSH Term Description Entries
D008099 Liver A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances. Livers
D008115 Liver Regeneration Repair or renewal of hepatic tissue. Liver Regenerations,Regeneration, Liver,Regenerations, Liver
D008297 Male Males
D008822 Mice, Transgenic Laboratory mice that have been produced from a genetically manipulated EGG or EMBRYO, MAMMALIAN. Transgenic Mice,Founder Mice, Transgenic,Mouse, Founder, Transgenic,Mouse, Transgenic,Mice, Transgenic Founder,Transgenic Founder Mice,Transgenic Mouse
D008930 Mitochondria, Liver Mitochondria in hepatocytes. As in all mitochondria, there are an outer membrane and an inner membrane, together creating two separate mitochondrial compartments: the internal matrix space and a much narrower intermembrane space. In the liver mitochondrion, an estimated 67% of the total mitochondrial proteins is located in the matrix. (From Alberts et al., Molecular Biology of the Cell, 2d ed, p343-4) Liver Mitochondria,Liver Mitochondrion,Mitochondrion, Liver
D010725 Phosphocreatine An endogenous substance found mainly in skeletal muscle of vertebrates. It has been tried in the treatment of cardiac disorders and has been added to cardioplegic solutions. (Reynolds JEF(Ed): Martindale: The Extra Pharmacopoeia (electronic version). Micromedex, Inc, Englewood, CO, 1996) Creatine Phosphate,Neoton,Phosphocreatine, Disodium Salt,Phosphorylcreatine,Disodium Salt Phosphocreatine,Phosphate, Creatine
D003402 Creatine Kinase A transferase that catalyzes formation of PHOSPHOCREATINE from ATP + CREATINE. The reaction stores ATP energy as phosphocreatine. Three cytoplasmic ISOENZYMES have been identified in human tissues: the MM type from SKELETAL MUSCLE, the MB type from myocardial tissue and the BB type from nervous tissue as well as a mitochondrial isoenzyme. Macro-creatine kinase refers to creatine kinase complexed with other serum proteins. Creatine Phosphokinase,ADP Phosphocreatine Phosphotransferase,ATP Creatine Phosphotransferase,Macro-Creatine Kinase,Creatine Phosphotransferase, ATP,Kinase, Creatine,Macro Creatine Kinase,Phosphocreatine Phosphotransferase, ADP,Phosphokinase, Creatine,Phosphotransferase, ADP Phosphocreatine,Phosphotransferase, ATP Creatine
D004734 Energy Metabolism The chemical reactions involved in the production and utilization of various forms of energy in cells. Bioenergetics,Energy Expenditure,Bioenergetic,Energy Expenditures,Energy Metabolisms,Expenditure, Energy,Expenditures, Energy,Metabolism, Energy,Metabolisms, Energy
D006498 Hepatectomy Excision of all or part of the liver. (Dorland, 28th ed) Hepatectomies
D000227 Adenine Nucleotides Adenine Nucleotide,Adenosine Phosphate,Adenosine Phosphates,Nucleotide, Adenine,Nucleotides, Adenine,Phosphate, Adenosine,Phosphates, Adenosine

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