Referenced in: none

Automatically associated channels: Slo1

Title: Selective facilitation of LTP in the ventral hippocampus by calcium stores.

Authors: Gayane Grigoryan, Eduard Korkotian, Menahem Segal

Journal, date & volume: Hippocampus, 2012 Jul , 22, 1635-44

PubMed link: http://www.ncbi.nlm.nih.gov/pubmed/22271636

Abstract
The effects of low concentrations of caffeine and ryanodine on field excitatory postsynaptic potentials (EPSPs) and long-term potentiation (LTP) were studied in CA1 region of slices of dorsal and ventral hippocampus (DH and VH, respectively). There was a striking difference between the two regions in the magnitude of effect of both drugs, as well as the ability to interact with a tetanic stimulation to produce LTP. Low concentration of caffeine (1 mM) produced a postsynaptic increase in the slope of population EPSPs in VH, and facilitated LTP in this region. Low concentration of ryanodine (0.2 μM) was able to convert short-term potentiation (STP) to LTP in VH only. These effects are postsynaptic and they reflect a higher concentration of ryanodine receptors (RyRs) in the VH compared to the DH.