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- W2023275821 abstract "Brief applications of high glycine concentrations to hippocampal slices have been shown to produce long-lasting changes in synaptic efficacy. In the present study, we show that glycine application transiently and reversibly increases the amplitude and prolongs the duration of synaptic potentials mediated by N-methyl-D-aspartate (NMDA) receptors. The long-lasting changes in synaptic potentials mediated by AMPA receptors are correlated with changes in the binding of [3H]alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid ([3H]AMPA) to membranes prepared from glycine-treated slices. The changes in binding properties of AMPA receptors in adult slices are due to an increase in affinity of the agonist for the receptor. Furthermore, glycine-induced increases in [3H]AMPA binding and in synaptic potentials in adult hippocampal slices are markedly reduced in the presence of low extracellular calcium or of the phospholipase inhibitor bromophenacylbromide. Finally, glycine-induced potentiation of synaptic potentials is associated with an increased potency of the glutamate receptor antagonist, 6,7-dinitroquinoxaline (DNQX), to inhibit synaptic potentials. The results indicate that glycine-induced changes in synaptic efficacy are likely triggered by the activation of NMDA receptors and expressed by changes in the properties of AMPA receptors. As similar events underly long-term potentiation (LTP), this phenomenon might provide important clues to elucidate the molecular mechanisms involved in LTP maintenance." @default.
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- W2023275821 date "1993-11-01" @default.
- W2023275821 modified "2023-10-17" @default.
- W2023275821 title "Glycine-induced changes in synaptic efficacy in hippocampal slices involve changes in AMPA receptors" @default.
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- W2023275821 doi "https://doi.org/10.1016/0006-8993(93)90329-l" @default.
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