Transcriptional responses to growth factor and G protein-coupled receptors in PC12 cells: comparison of alpha(1)-adrenergic receptor subtypes

J Neurochem. 2000 Jun;74(6):2392-400. doi: 10.1046/j.1471-4159.2000.0742392.x.

Abstract

Transcriptional responses to growth factor and G protein-coupled receptors were compared in PC12 cells using retroviral luciferase reporters. In cells stably expressing alpha(1A)-adrenergic receptors, norepinephrine activated all five reporters [AP1 (activator protein-1), SRE (serum response element), CRE (cyclic AMP response element), NFkappaB) (nuclear factor-kappaB), and NFAT (nuclear factor of activated T cells)], whereas nerve growth factor (NGF) and epidermal growth factor activated only AP1 and SRE. Activation of P2Y2 receptors by UTP did not activate any reporters. Protein kinase C inhibition blocked NFkappaB activation by norepinephrine, but potentiated CRE. Mitogen-activated protein kinase kinase inhibition blocked AP1 activation by norepinephrine, but also potentiated CRE. p38 mitogen-activated protein kinase inhibition reduced most norepinephrine responses, but not NGF responses. inhibition of Src eliminated SRE responses to norepinephrine and NGF, and reduced all responses except CRE. Phosphatidylinositol 3-kinase inhibitors markedly potentiated CRE activation by norepinephrine, with only small effects on the other responses. Comparison of the three human subtypes showed that the alpha(1A) activated all five reporters, the alpha(1B) showed smaller effects, and the alpha(1D) was ineffective. Cell differentiation caused by norepinephrine, but not NGF, was reduced by all inhibitors studied. These experiments suggest that alpha(1A)-adrenergic receptors activate a wider array of transcriptional responses than do growth factors in PC12 cells. These responses are not linearly related to second messenger production, and different subtypes show different patterns of activation.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Cell Differentiation / drug effects
  • Cell Differentiation / physiology
  • Chelating Agents / pharmacology
  • Cyclic AMP Response Element-Binding Protein / genetics
  • Cyclic AMP-Dependent Protein Kinases / antagonists & inhibitors
  • Cyclic AMP-Dependent Protein Kinases / metabolism
  • DNA-Binding Proteins / genetics
  • Dose-Response Relationship, Drug
  • Egtazic Acid / analogs & derivatives
  • Egtazic Acid / pharmacology
  • Enzyme Inhibitors / pharmacology
  • Epidermal Growth Factor / pharmacology
  • Flavonoids / pharmacology
  • GTP-Binding Proteins / genetics*
  • GTP-Binding Proteins / metabolism
  • Gene Expression / drug effects
  • Gene Expression / physiology
  • Genes, Reporter
  • Humans
  • Imidazoles / pharmacology
  • Indoles / pharmacology
  • Luciferases / genetics
  • Maleimides / pharmacology
  • Mitogen-Activated Protein Kinases / antagonists & inhibitors
  • Mitogen-Activated Protein Kinases / metabolism
  • NF-kappa B / genetics
  • NFATC Transcription Factors
  • Nerve Growth Factors / pharmacology*
  • Neurons / chemistry
  • Neurons / cytology
  • Neurons / enzymology*
  • Norepinephrine / pharmacology
  • Nuclear Proteins*
  • PC12 Cells
  • Phosphatidylinositol 3-Kinases / metabolism
  • Phosphoinositide-3 Kinase Inhibitors
  • Protein Kinase C / antagonists & inhibitors
  • Protein Kinase C / metabolism
  • Pyridines / pharmacology
  • Rats
  • Receptors, Adrenergic, alpha-1 / genetics*
  • Receptors, Adrenergic, alpha-1 / metabolism
  • Sympathomimetics / pharmacology
  • Transcription Factors / genetics
  • Transcriptional Activation / drug effects*
  • Transcriptional Activation / physiology
  • Transfection
  • p38 Mitogen-Activated Protein Kinases

Substances

  • Chelating Agents
  • Cyclic AMP Response Element-Binding Protein
  • DNA-Binding Proteins
  • Enzyme Inhibitors
  • Flavonoids
  • Imidazoles
  • Indoles
  • Maleimides
  • NF-kappa B
  • NFATC Transcription Factors
  • Nerve Growth Factors
  • Nuclear Proteins
  • Phosphoinositide-3 Kinase Inhibitors
  • Pyridines
  • Receptors, Adrenergic, alpha-1
  • Sympathomimetics
  • Transcription Factors
  • Egtazic Acid
  • Epidermal Growth Factor
  • Luciferases
  • Cyclic AMP-Dependent Protein Kinases
  • Protein Kinase C
  • Mitogen-Activated Protein Kinases
  • p38 Mitogen-Activated Protein Kinases
  • GTP-Binding Proteins
  • 1,2-bis(2-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid
  • bisindolylmaleimide I
  • 4-(4-fluorophenyl)-2-(4-hydroxyphenyl)-5-(4-pyridyl)imidazole
  • 2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one
  • Norepinephrine