Progesterone regulation of synaptic transmission and plasticity in rodent hippocampus
Author(s) -
Michael R. Foy,
Garnik Akopian,
Richard F. Thompson
Publication year - 2008
Publication title -
learning and memory
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.228
H-Index - 136
eISSN - 1549-5485
pISSN - 1072-0502
DOI - 10.1101/lm.1124708
Subject(s) - long term potentiation , synaptic plasticity , neurotransmission , hippocampus , synaptic fatigue , neuroscience , metaplasticity , synaptic augmentation , hippocampal formation , synaptic scaling , neuroplasticity , nonsynaptic plasticity , long term depression , extracellular , chemistry , biology , glutamate receptor , ampa receptor , biochemistry , receptor
Ovarian hormones influence memory formation by eliciting changes in neural activity. The effects of various concentrations of progesterone (P4) on synaptic transmission and plasticity associated with long-term potentiation (LTP) and long-term depression (LTD) were studied using in vitro hippocampal slices. Extracellular studies show that the highest concentration of P4 tested (10(-6) M) decreased the baseline synaptic transmission and magnitude of LTP, but did not affect LTD. Intracellular studies suggest the P4 effect to be mediated, at least in part, by GABA(A) activity. These results establish a general effect of P4 on synaptic transmission, multiple forms of synaptic plasticity, and a possible mechanism of P4 action in hippocampus.
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