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Related Experiment Videos

Nerve growth factor and K-252a increase catecholamine release from PC12 cells.

B Nikodijevic1, C R Creveling, S Koizumi

  • 1Section on Growth Factors, National Institute of Child Health and Human Development, Bethesda, Maryland 20892.

Journal of Neuroscience Research
|July 1, 1990
PubMed
Summary
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Nerve growth factor rapidly increases catecholamine release from PC12 cells, independent of metabolism. This effect requires extracellular calcium and is blocked by calcium channel antagonists.

Area of Science:

  • Neuroscience
  • Cell Biology
  • Pharmacology

Background:

  • PC12 cells are a rat pheochromocytoma model known for nerve growth factor (NGF) responsiveness.
  • These cells synthesize and secrete catecholamines (dopamine, norepinephrine) upon stimulation.
  • NGF elicits rapid cellular changes, including membrane rearrangement and protein phosphorylation.

Purpose of the Study:

  • To investigate the rapid release of catecholamines from PC12 cells induced by NGF.
  • To determine the dependence of NGF-induced catecholamine release on extracellular calcium and metabolism.
  • To explore the effect of K-252a, an NGF inhibitor, on catecholamine release.

Main Methods:

  • Treatment of PC12 cells with nerve growth factor (NGF).
  • Measurement of catecholamine (dopamine, norepinephrine) release.

Related Experiment Videos

  • Assessment of NGF effects under varying extracellular calcium concentrations.
  • Evaluation of calcium channel antagonists and K-252a on catecholamine release.

    • Main Results:

    • NGF treatment rapidly increased dopamine and norepinephrine release within minutes.
    • This release was independent of NGF's effect on catecholamine metabolism.
    • The NGF-induced release was dependent on extracellular calcium.
    • Calcium channel antagonists inhibited the NGF-induced catecholamine release.
    • K-252a, an NGF inhibitor, also stimulated catecholamine release.

    Conclusions:

    • NGF rapidly stimulates catecholamine secretion from PC12 cells via a calcium-dependent mechanism.
    • The observed release is a direct effect of NGF, not mediated by metabolic changes.
    • Calcium influx is crucial for NGF-induced catecholamine release.
    • K-252a exhibits an unexpected role in promoting catecholamine release, distinct from its NGF inhibitory action.