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Related Experiment Videos

Phorbol ester promotes growth of synaptic plasticity.

A Routtenberg, P Colley, D Linden

    Brain Research
    |July 23, 1986
    PubMed
    Summary

    12-O-tetradecanoylphorbol-13-acetate (TPA) application to the rat hippocampus prevents decay of synaptic potentiation. This suggests protein kinase C (PKC) activation by TPA plays a role in regulating synaptic plasticity.

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    Area of Science:

    • Neuroscience
    • Cellular Neuroscience
    • Synaptic Plasticity

    Background:

    • High frequency stimulation (HFS) of the perforant path induces synaptic potentiation in the rat hippocampus.
    • The decay of this enhanced potentiation is typically observed within 2 hours post-stimulation.
    • Tumor-promoting phorbol esters, like TPA, are known activators of protein kinase C (PKC).

    Purpose of the Study:

    • To investigate the effect of 12-O-tetradecanoylphorbol-13-acetate (TPA) on synaptic potentiation in the rat hippocampus.
    • To explore the role of protein kinase C (PKC) in regulating synaptic plasticity.

    Main Methods:

    • Iontophoretic application of TPA to the intact rat hippocampus.
    • High frequency stimulation (HFS) of the perforant path.

    Related Experiment Videos

  • Recording of population spike amplitude and population excitatory postsynaptic potential (fEPSP) slope in the hilar dentate gyrus.

    • Main Results:

    • TPA application prevented the decay of enhanced population spike amplitude following HFS.
    • Potentiated responses showed growth starting at 45 minutes post-HFS in TPA-treated animals.
    • Similar effects were observed on the population excitatory postsynaptic potential (fEPSP) slope, indicating sustained synaptic response.

    Conclusions:

    • Membrane-associated protein kinase C (PKC) activation by TPA appears to play a crucial role in maintaining synaptic potentiation.
    • These findings suggest a regulatory role for PKC in synaptic plasticity within the hippocampus.