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  • Title: LTP in the lateral perforant path is beta-adrenergic receptor-dependent.
    Author: Bramham CR, Bacher-Svendsen K, Sarvey JM.
    Journal: Neuroreport; 1997 Feb 10; 8(3):719-24. PubMed ID: 9106754.
    Abstract:
    Norepinephrine induces an activity-independent long-lasting depression of synaptic transmission in the lateral perforant path input to dentate granule cells, whereas high frequency stimulation induces activity-dependent long-term potentiation (LTP). We investigated the role of endogenous activation of beta-adrenergic receptors in LTP of the lateral and medial perforant paths under conditions affording selective stimulation of these pathways in the rat hippo-campal slice. Propranolol (1 microM), a beta-receptor antagonist, blocked LTP induction of both lateral and medial perforant path-evoked field excitatory postsynaptic potentials. The results indicate a broad requirement for norepinephrine in different types of synaptic plasticity, including activity-independent depression and activity-dependent LTP in the lateral perforant path.
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