Postsynaptic CAMP pathway gates early LTP in hippocampal CA1 region

Robert D. Blitzer, Tony Wong, Rabin Nouranifar, Ravi Iyengar, Emmanuel M. Landau

Research output: Contribution to journalArticlepeer-review

271 Scopus citations

Abstract

The role of the CAMP pathway in LTP was studied in the CAI region of hippocampus. Widely spaced trains of high frequency stimulation generated CAMP postsynaptically via NMDA receptors and calmodulin, consistent with the Ca2+/calmodulin-mediated stimulation of postsynaptic adenylyl cyclase. The early phase of LTP produced by the same pattern of high frequency stimulation was dependent on postsynaptic cAMP. However, synaptic transmission was not increased by postsynaptic application of CAMP. Early LTP became cAMP-independent when protein phosphatase inhibitors were injected postsynaptically. These observations indicate that in early UP the cAMP signaling pathway, instead of transmitting signals for the generation of LTP, gates UP through postsynaptic protein phosphatases.

Original languageEnglish
Pages (from-to)1403-1414
Number of pages12
JournalNeuron
Volume15
Issue number6
DOIs
StatePublished - Dec 1995

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