Kainate receptor-mediated heterosynaptic facilitation in the amygdala.
Prolonged low-frequency stimulation of excitatory afferents to basolateral amygdala neurons results in enduring enhancement of excitatory synaptic responses. The induction of this form of synaptic plasticity is eliminated by selective antagonists of GluR5 kainate receptors and can be mimicked by the GluR5 agonist ATPA. Kainate receptor-mediated synaptic facilitation generalizes to include inactive afferent synapses on the target neurons, and therefore contrasts with other types of activity-dependent enduring synaptic facilitation that are input-pathway specific. Such heterosynaptic spread of synaptic facilitation could account for adaptive and pathological expansion in the set of critical internal and external stimuli that trigger amygdala-dependent behavioral responses.
Li
H
H
Department of Psychiatry, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, Maryland 20814-4799, USA.
Chen
A
A
Xing
G
G
Wei
M L
ML
Rogawski
M A
MA
D000679:Amygdala / Q000502:physiology*; D000818:Animals; D002118:Calcium / Q000502:physiology; D004533:Egtazic Acid / Q000031:analogs & derivatives / Q000494:pharmacology; D004558:Electric Stimulation; D018691:Excitatory Amino Acid Antagonists / Q000494:pharmacology; D066298:In Vitro Techniques; D007555:Isoxazoles / Q000494:pharmacology; D008297:Male; D009474:Neurons / Q000502:physiology*; D011422:Propionates / Q000494:pharmacology; D051381:Rats; D017207:Rats, Sprague-Dawley; D018092:Kainic Acid Receptors / Q000187:drug effects / Q000235:genetics / Q000502:physiology*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013569:Synapses / Q000502:physiology*; D009435:Synaptic Transmission / Q000187:drug effects / Q000502:physiology*; D000097806:GluK2 Kainate Receptor
D002118:Calcium; D004533:Egtazic Acid; D018691:Excitatory Amino Acid Antagonists; D007555:Isoxazoles; D011422:Propionates; D018092:Kainic Acid Receptors; D000097806:GluK2 Kainate Receptor; C070379:1,2-bis(2-aminophenoxy)ethane N,N,N',N'-tetraacetic acid acetoxymethyl ester; C081662:alpha-amino-3-hydroxy-5-tert-butyl-4-isoxazolepropionate