title: A PKCbeta isoform mediates phorbol ester-induced activation of Erk1/2 and expression of neuronal differentiation genes in neuroblastoma cells.
abstract: Protein kinase C (PKC) activation induces neuronal differentiation of SH-SY5Y neuroblastoma cells. This study examines the role of PKCbeta isoforms in this process. The PKCbeta-specific inhibitor LY379196 had no effect on 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced neurite outgrowth from SH-SY5Y neuroblastoma cells. On the other hand, PKCbeta inhibition suppressed the TPA-stimulated increase in neuropeptide Y mRNA, activation of neuropeptide Y gene promoter elements, and phosphorylation of Erk1/2. The TPA-induced increase in neuropeptide Y expression was also inhibited by the MEK inhibitor PD98059. These data indicate that activation of a PKCbeta isoform, through a pathway involving Erk1/2, leads to increased expression of neuronal differentiation genes in neuroblastoma cells.
authors.affiliation: Lund University, Molecular Medicine, Malmö University Hospital, 205 02 Malmö, Sweden
authors.forename: U
authors.initials: U
authors.lastname: Trollér
authors.forename: R
authors.initials: R
authors.lastname: Zeidman
authors.forename: K
authors.initials: K
authors.lastname: Svensson
authors.forename: C
authors.initials: C
authors.lastname: Larsson
mesh_terms: D002454:Cell Differentiation; D016895:Culture Media, Serum-Free; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005419:Flavonoids / Q000494:pharmacology; D019922:GAP-43 Protein / Q000378:metabolism; D005786:Gene Expression Regulation / Q000502:physiology; D017930:Genes, Reporter; D007527:Isoenzymes / Q000037:antagonists & inhibitors / Q000378:metabolism*; D008698:Mesylates / Q000494:pharmacology; D019950:Mitogen-Activated Protein Kinase 1 / Q000378:metabolism*; D048052:Mitogen-Activated Protein Kinase 3; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism*; D016501:Neurites / Q000378:metabolism; D009447:Neuroblastoma; D009474:Neurons / Q000166:cytology / Q000502:physiology*; D009478:Neuropeptide Y / Q000235:genetics / Q000378:metabolism; D010766:Phosphorylation; D011401:Promoter Regions, Genetic; D011493:Protein Kinase C / Q000037:antagonists & inhibitors / Q000378:metabolism*; D064546:Protein Kinase C beta; D011758:Pyrroles / Q000494:pharmacology; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology*; D014407:Tumor Cells, Cultured
chemical_list: C434605:5,21 - 12,17-dimetheneo-18H-dibenzo(i,o)pyrrolo(3,4-1)(1,8)diazacyclohexandecine-18,10(19H)dione,8((dimethylamino)methyl)-6,7,8,9,10,11-hexahydro,monomethanesulfonate; D016895:Culture Media, Serum-Free; D004791:Enzyme Inhibitors; D005419:Flavonoids; D019922:GAP-43 Protein; D007527:Isoenzymes; D008698:Mesylates; D009478:Neuropeptide Y; D011758:Pyrroles; D011493:Protein Kinase C; D064546:Protein Kinase C beta; D019950:Mitogen-Activated Protein Kinase 1; D048052:Mitogen-Activated Protein Kinase 3; D020928:Mitogen-Activated Protein Kinases; D013755:Tetradecanoylphorbol Acetate; C093973:2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one