PMID- 169673 OWN - NLM STAT- MEDLINE DCOM- 19751126 LR - 20161123 IS - 0386-300X (Print) IS - 0386-300X (Linking) VI - 29 IP - 2 DP - 1975 Apr TI - Undifferentiated patterns of key glycolytic and gluconeogenic enzymes in epithelial cell lines derived from rat liver. PG - 151-9 AB - Established epithelial cell lines derived from livers of 7-day (B, B-R, B-3-4-7, J-C-1, J-C-13, J-5-2-1, E-C-4 and E-C-7) and adult (AL-2, AL-3, AL-4, AL-5 and AL-6) rats were analyzed for hexokinase (HK), pyruvate kinase (PK), glucose 6-phosphate dehydrogenase (G6PD), 6-phosphogluconate dehydrogenase (6PGD), glucose 6-phosphatase (G6Pase) and fructose 1,6-diphosphatase (FDPase). None of the cell lines showed appreciable activities of adult type liver enzymes (HK Type IVs (glucokinase), PK Type L, G6Pase and FDPase). On the contrary, the activities of fetal type liver enzymes (HK Types I and II, PK Type M2 and G6PD) increased markedly as compared with dispersed cells or tissues of adult liver. 6PGD gave minimum changes in activity, and the 6PGD/G6PD ratio decreased consistently. HK Type III was found only in J-C-13, AL-5 and AL-6, while HK Type IVf (high Km) was present in all the cell lines examined. Possible explanations for the undifferentiated patterns of carbohydrate-metabolizing enzymes in the established cell lines, which have several evidence of hepatocyte origin, are presented. FAU - Taketa, K AU - Taketa K FAU - Watanabe, A AU - Watanabe A FAU - Shimamura, J AU - Shimamura J FAU - Takesue, A AU - Takesue A FAU - Ueda, M AU - Ueda M LA - eng PT - Journal Article PL - Japan TA - Acta Med Okayama JT - Acta medica Okayama JID - 0417611 RN - EC 1.1.- (Alcohol Oxidoreductases) RN - EC 1.1.1.43 (Phosphogluconate Dehydrogenase) RN - EC 1.1.1.49 (Glucosephosphate Dehydrogenase) RN - EC 2.7.- (Phosphotransferases) RN - EC 2.7.1.1 (Hexokinase) RN - EC 2.7.1.2 (Glucokinase) RN - EC 2.7.1.40 (Pyruvate Kinase) RN - EC 3.1.3.11 (Fructose-Bisphosphatase) RN - EC 3.1.3.2 (Phosphoric Monoester Hydrolases) RN - EC 3.1.3.9 (Glucose-6-Phosphatase) SB - IM MH - Alcohol Oxidoreductases/*metabolism MH - Animals MH - Cell Differentiation MH - *Cell Line MH - Epithelial Cells MH - Epithelium/enzymology MH - Female MH - Fructose-Bisphosphatase/metabolism MH - Glucokinase/metabolism MH - Glucose-6-Phosphatase/metabolism MH - Glucosephosphate Dehydrogenase/metabolism MH - Hexokinase/metabolism MH - Liver/*enzymology MH - Male MH - Phosphogluconate Dehydrogenase/metabolism MH - Phosphoric Monoester Hydrolases/*metabolism MH - Phosphotransferases/*metabolism MH - Pyruvate Kinase/metabolism MH - Rats EDAT- 1975/04/01 00:00 MHDA- 1975/04/01 00:01 CRDT- 1975/04/01 00:00 PHST- 1975/04/01 00:00 [pubmed] PHST- 1975/04/01 00:01 [medline] PHST- 1975/04/01 00:00 [entrez] PST - ppublish SO - Acta Med Okayama. 1975 Apr;29(2):151-9.