ERIC Number: EJ1005328
Record Type: Journal
Publication Date: 2013-Feb
Abstractor: As Provided
Reference Count: 0
p300/CBP Histone Acetyltransferase Activity Is Required for Newly Acquired and Reactivated Fear Memories in the Lateral Amygdala
Maddox, Stephanie A.; Watts, Casey S.; Schafe, Glenn E.
Learning & Memory, v20 n2 p109-119 Feb 2013
Modifications in chromatin structure have been widely implicated in memory and cognition, most notably using hippocampal-dependent memory paradigms including object recognition, spatial memory, and contextual fear memory. Relatively little is known, however, about the role of chromatin-modifying enzymes in amygdala-dependent memory formation. Here, we use a combination of biochemical, behavioral, and neurophysiological methods to systematically examine the role of p300/CBP histone acetyltransferase (HAT) activity in the consolidation and reconsolidation of auditory Pavlovian fear memories. We show that local infusions of c646, a selective pharmacological inhibitor of p300/CBP activity, shortly following either fear conditioning or fear memory retrieval impair training and retrieval-related regulation of histone acetylation in the lateral nucleus of the amygdala (LA). Furthermore, we show that intra-LA infusion of c646 significantly impairs fear memory consolidation, reconsolidation, and associated neural plasticity in the LA. Our findings collectively suggest that p300/CBP HAT activity is critical for the consolidation and reconsolidation of amygdala-dependent Pavlovian fear memories.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A