Journal
CURRENT OPINION IN NEUROBIOLOGY
Volume 21, Issue 2, Pages 291-298Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.conb.2011.01.001
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Funding
- National Institute of Health [MH079407]
- NARSAD
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AMPA receptors (AMPARs) are heterotetromeric complexes composed of GluA1-4 subunits. They are glutamate-gated channels traditionally considered solely as ion carriers for postsynaptic depolarization. However, the existence and dynamic regulation of GluA2-lacking, calcium-permeable AMPARs (Cp-AMPARs) enable these special receptors to serve also as signaling molecules presumably via calcium influx. Recent studies have implicated Cp-AMPARs in several types of synaptic plasticity, including homeostatic synaptic regulation and Hebbian synaptic plasticity. Cp-AMPARs are usually expressed transiently at an early stage of synaptic plasticity, but are then replaced with normal GluA2-containing receptors, indicating a role for Cp-AMPARs in induction, rather than the maintenance, of synaptic plasticity.
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