The Reactive Plasticity of Hippocampal Ionotropic Glutamate Receptors in Animal Epilepsies

International Journal of Molecular Sciences
András Mihály

Abstract

Ionotropic glutamate receptors (iGluRs) mediate the synaptic and metabolic actions of glutamate. These iGluRs are classified within the α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid (AMPA)-type, kainate-type, and N-methyl-d-aspartate (NMDA)-type functional receptor families. The iGluR assemblies are regulated by transcription, alternative splicing, and cytoplasmic post-translational modifications. The iGluR subunit proteins are transported from the endoplasmic reticulum, inserted into the synaptic membranes, and anchored at their action site by different scaffolding and interacting proteins. The functional properties of iGluRs depend on their subunit composition, the amino acid sequence of the protein domains, and the scaffolding proteins in the synaptic membranes. The iGluRs are removed from the membranes by enzymatic action and endocytosis. Hippocampal iGluRs are rearranged through the upregulation and downregulation of the subunits following deafferentation and epileptic seizures. The rearrangement of iGluRs and the alteration of their subunit composition transform neurons into "pathological" cells, determining the further plasticity or pathology of the hippocampal formation. In the present review, we summarize the e...Continue Reading

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Citations

Aug 8, 2021·International Journal of Molecular Sciences·Tatyana Y PostnikovaAleksey V Zaitsev
Aug 27, 2021·Cellular and Molecular Neurobiology·Qing-Lin WuNai-Hong Chen

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