GABA A receptor-mediated feedforward and feedback inhibition differentially modulate hippocampal spike timing-dependent plasticity

Hyun Jae Jang, Jeehyun Kwag

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Synaptic plasticity is believed to play an important role in hippocampal learning and memory. The precise and relative timing of pre- and postsynaptic activity has been shown to determine the sign and amplitude of hippocampal synaptic plasticity through spike timing-dependent plasticity (STDP). While most studies on STDP have mainly focused on excitatory synapses, neural networks are composed not only of excitatory synapses, but also of inhibitory synapses. Interneurons are known to make inhibitory synaptic connections with hippocampal CA1 pyramidal neurons through feedforward and feedback inhibitory networks. However, the roles of different inhibitory network structures on STDP remain unknown. Using a simplified hippocampal network model with a deterministic Ca 2+ dynamics-dependent STDP model, we show that feedforward and feedback inhibitory networks differentially modulate STDP. Moreover, inhibitory synaptic weight and synaptic location influenced the STDP profile. Taken together, our results provide a computational role of inhibitory network in STDP and in memory processing of hippocampal circuits.

Original languageEnglish
Pages (from-to)466-472
Number of pages7
JournalBiochemical and Biophysical Research Communications
Volume427
Issue number3
DOIs
Publication statusPublished - 2012 Oct 26

Fingerprint

GABA-A Receptors
Synapses
Plasticity
Neuronal Plasticity
Feedback
Pyramidal Cells
Interneurons
Learning
Weights and Measures
Inhibition (Psychology)
Data storage equipment
Neurons
Neural networks
Networks (circuits)
Processing

Keywords

  • Feedback inhibition
  • Feedforward inhibition
  • Hippocampus
  • Interneuron
  • NEURON simulation model
  • Spike timing-dependent plasticity

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Cell Biology
  • Molecular Biology

Cite this

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abstract = "Synaptic plasticity is believed to play an important role in hippocampal learning and memory. The precise and relative timing of pre- and postsynaptic activity has been shown to determine the sign and amplitude of hippocampal synaptic plasticity through spike timing-dependent plasticity (STDP). While most studies on STDP have mainly focused on excitatory synapses, neural networks are composed not only of excitatory synapses, but also of inhibitory synapses. Interneurons are known to make inhibitory synaptic connections with hippocampal CA1 pyramidal neurons through feedforward and feedback inhibitory networks. However, the roles of different inhibitory network structures on STDP remain unknown. Using a simplified hippocampal network model with a deterministic Ca 2+ dynamics-dependent STDP model, we show that feedforward and feedback inhibitory networks differentially modulate STDP. Moreover, inhibitory synaptic weight and synaptic location influenced the STDP profile. Taken together, our results provide a computational role of inhibitory network in STDP and in memory processing of hippocampal circuits.",
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