Glucocorticoids in the prefrontal cortex enhance memory consolidation and impair working memory by a common neural mechanism.
It is well established that acute administration of adrenocortical hormones enhances the consolidation of memories of emotional experiences and, concurrently, impairs working memory. These different glucocorticoid effects on these two memory functions have generally been considered to be independently regulated processes. Here we report that a glucocorticoid receptor agonist administered into the medial prefrontal cortex (mPFC) of male Sprague-Dawley rats both enhances memory consolidation and impairs working memory. Both memory effects are mediated by activation of a membrane-bound steroid receptor and depend on noradrenergic activity within the mPFC to increase levels of cAMP-dependent protein kinase. These findings provide direct evidence that glucocorticoid effects on both memory consolidation and working memory share a common neural influence within the mPFC.
Barsegyan
Areg
A
Department of Neuroscience, Section Anatomy, University Medical Center Groningen, University of Groningen, 9713 AV, Groningen, The Netherlands. a.barsegyan@med.umcg.nl
Mackenzie
Scott M
SM
Kurose
Brian D
BD
McGaugh
James L
JL
Roozendaal
Benno
B
D000679:Amygdala / Q000187:drug effects / Q000502:physiology; D000732:Androstanols / Q000008:administration & dosage; D000818:Animals; D003345:Corticosterone / Q000008:administration & dosage; D017868:Cyclic AMP-Dependent Protein Kinases / Q000502:physiology; D005938:Glucocorticoids / Q000008:administration & dosage*; D008297:Male; D008568:Memory / Q000187:drug effects* / Q000502:physiology*; D008570:Memory, Short-Term / Q000187:drug effects* / Q000502:physiology*; D008959:Models, Neurological; D017397:Prefrontal Cortex / Q000187:drug effects* / Q000502:physiology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D011943:Receptors, Adrenergic, beta / Q000502:physiology; D011965:Receptors, Glucocorticoid / Q000819:agonists; D015398:Signal Transduction / Q000187:drug effects / Q000502:physiology
D000732:Androstanols; D005938:Glucocorticoids; D011943:Receptors, Adrenergic, beta; D011965:Receptors, Glucocorticoid; C049154:11,17-dihydroxy-6-methyl-17-(1-propynyl)androsta-1,4,6-triene-3-one; D017868:Cyclic AMP-Dependent Protein Kinases; D003345:Corticosterone
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