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Expression of peroxisomal enoyl-CoA hydratase/3-hydroxyacyl-CoA dehydrogenase enzyme and its mRNA in peroxisome proliferator-induced liver tumors. 1994

M S Rao, and H Ide, and A V Yeldandi, and S Kumar, and J K Reddy
Department of Pathology, Northwestern University Medical School, Chicago, IL 60611.

We have examined ciprofibrate and dehydroepiandrosterone (DHEA)-induced hepatic lesions for the peroxisomal beta-oxidation system enzyme peroxisomal enoyl-CoA hydratase/3-hydroxyacyl-CoA dehydrogenase (PBE) and its mRNA using SDS-polyacrylamide gel electrophoresis, antibodies and cDNA probe. All 12 neoplastic nodules and nine hepatocellular carcinomas (HCCs) that were analyzed for PBE mRNA by in situ hybridization showed an intense signal comparable to the adjacent non-neoplastic liver. SDS-polyacrylamide gel electrophoresis of postnuclear fractions of six HCC and adjacent liver tissue showed a marked increase in an 80 kDa polypeptide. Immunoblot and Northern blot analysis showed a marked increase in PBE enzyme and PBE mRNA respectively in HCC and adjacent non-neoplastic liver tissue. In control livers (animals not treated with peroxisome proliferators), the levels of PBE enzyme and mRNA were very low or undetectable. The results of this study clearly indicate that peroxisome proliferator (PP)-induced liver lesions express peroxisomal enzymes to the same extent as adjacent liver and that these enzymes are not useful markers for identification of PP-induced lesions.

UI MeSH Term Description Entries
D007535 Isomerases A class of enzymes that catalyze geometric or structural changes within a molecule to form a single product. The reactions do not involve a net change in the concentrations of compounds other than the substrate and the product.(from Dorland, 28th ed) EC 5. Isomerase
D008114 Liver Neoplasms, Experimental Experimentally induced tumors of the LIVER. Hepatoma, Experimental,Hepatoma, Morris,Hepatoma, Novikoff,Experimental Hepatoma,Experimental Hepatomas,Experimental Liver Neoplasms,Hepatomas, Experimental,Neoplasms, Experimental Liver,Experimental Liver Neoplasm,Liver Neoplasm, Experimental,Morris Hepatoma,Novikoff Hepatoma
D008297 Male Males
D008830 Microbodies Electron-dense cytoplasmic particles bounded by a single membrane, such as PEROXISOMES; GLYOXYSOMES; and glycosomes. Glycosomes,Glycosome,Microbody
D009097 Multienzyme Complexes Systems of enzymes which function sequentially by catalyzing consecutive reactions linked by common metabolic intermediates. They may involve simply a transfer of water molecules or hydrogen atoms and may be associated with large supramolecular structures such as MITOCHONDRIA or RIBOSOMES. Complexes, Multienzyme
D011916 Rats, Inbred F344 An inbred strain of rat that is used for general BIOMEDICAL RESEARCH purposes. Fischer Rats,Rats, Inbred CDF,Rats, Inbred Fischer 344,Rats, F344,Rats, Inbred Fisher 344,CDF Rat, Inbred,CDF Rats, Inbred,F344 Rat,F344 Rat, Inbred,F344 Rats,F344 Rats, Inbred,Inbred CDF Rat,Inbred CDF Rats,Inbred F344 Rat,Inbred F344 Rats,Rat, F344,Rat, Inbred CDF,Rat, Inbred F344,Rats, Fischer
D002455 Cell Division The fission of a CELL. It includes CYTOKINESIS, when the CYTOPLASM of a cell is divided, and CELL NUCLEUS DIVISION. M Phase,Cell Division Phase,Cell Divisions,Division Phase, Cell,Division, Cell,Divisions, Cell,M Phases,Phase, Cell Division,Phase, M,Phases, M
D002995 Clofibric Acid An antilipemic agent that is the biologically active metabolite of CLOFIBRATE. Clofibrinic Acid,2-(4-Chlorophenoxy)-2-methylpropionic Acid,NSC-1149,p-Chlorophenoxyisobutyrate,p-Chlorophenoxyisobutyric Acid,NSC 1149,NSC1149
D003687 Dehydroepiandrosterone A major C19 steroid produced by the ADRENAL CORTEX. It is also produced in small quantities in the TESTIS and the OVARY. Dehydroepiandrosterone (DHEA) can be converted to TESTOSTERONE; ANDROSTENEDIONE; ESTRADIOL; and ESTRONE. Most of DHEA is sulfated (DEHYDROEPIANDROSTERONE SULFATE) before secretion. Dehydroisoandrosterone,Prasterone,5-Androsten-3-beta-hydroxy-17-one,5-Androsten-3-ol-17-one,Androstenolone,DHEA,Prasterone, 3 alpha-Isomer,5 Androsten 3 beta hydroxy 17 one,5 Androsten 3 ol 17 one,Prasterone, 3 alpha Isomer
D004746 Enoyl-CoA Hydratase An enzyme that catalyzes reversibly the hydration of unsaturated fatty acyl-CoA to yield beta-hydroxyacyl-CoA. It plays a role in the oxidation of fatty acids and in mitochondrial fatty acid synthesis, has broad specificity, and is most active with crotonyl-CoA. EC 4.2.1.17. 3-Hydroxyacyl CoA Hydrolyases,3-Hydroxyacyl Dehydratases,Crotonase,Enoyl Hydrase,beta-Hydroxyacyl Dehydratases,Enoyl CoA Hydratases,beta-Hydroxyacyl-CoA Dehydrases,trans-2-Enoyl-Coenzyme A Hydratase,3 Hydroxyacyl CoA Hydrolyases,3 Hydroxyacyl Dehydratases,CoA Hydratases, Enoyl,CoA Hydrolyases, 3-Hydroxyacyl,Dehydrases, beta-Hydroxyacyl-CoA,Dehydratases, 3-Hydroxyacyl,Dehydratases, beta-Hydroxyacyl,Enoyl CoA Hydratase,Hydrase, Enoyl,Hydratase, Enoyl-CoA,Hydratase, trans-2-Enoyl-Coenzyme A,Hydratases, Enoyl CoA,Hydrolyases, 3-Hydroxyacyl CoA,beta Hydroxyacyl CoA Dehydrases,beta Hydroxyacyl Dehydratases,trans 2 Enoyl Coenzyme A Hydratase

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