The consolidation of new but not reactivated memory requires hippocampal C/EBPbeta.
Long-term memory formation consists of multiple phases. A new memory is initially labile and sensitive to disruption by a variety of interfering events or agents. To become stable, this new memory undergoes a process known as consolidation, which, in the case of declarative memories, occurs within the medial temporal lobes and requires gene expression. When recalled, memories re-enter a new phase of vulnerability and seem to require a reconsolidation process in order to be maintained. Here we show that consolidation but not reconsolidation of inhibitory avoidance memory requires the expression of the transcription factor CCAAT enhancer binding protein beta (C/EBPbeta) in the hippocampus. Furthermore, in the same region, de novo protein synthesis is not essential for memory reconsolidation. C/EBPbeta is an evolutionarily conserved genetic marker that has a selective role in the consolidation of new but not reactivated memories in the hippocampus.
Taubenfeld
S M
SM
Department of Neuroscience, Brown University, Providence, Rhode Island 02912, USA.
Milekic
M H
MH
Monti
B
B
Alberini
C M
CM
D000818:Animals; D000841:Anisomycin / Q000494:pharmacology; D001362:Avoidance Learning / Q000187:drug effects / Q000502:physiology; D022782:CCAAT-Enhancer-Binding Protein-beta / Q000096:biosynthesis / Q000187:drug effects / Q000235:genetics*; D017362:Cyclic AMP Response Element-Binding Protein / Q000235:genetics / Q000378:metabolism; D004334:Drug Administration Schedule; D005786:Gene Expression Regulation / Q000187:drug effects / Q000502:physiology*; D006624:Hippocampus / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D008568:Memory / Q000187:drug effects / Q000502:physiology*; D009474:Neurons / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D016376:Oligonucleotides, Antisense / Q000494:pharmacology; D011500:Protein Synthesis Inhibitors / Q000494:pharmacology; D012333:RNA, Messenger / Q000378:metabolism; D051381:Rats; D020318:Rats, Long-Evans; D011930:Reaction Time / Q000187:drug effects / Q000502:physiology; D009435:Synaptic Transmission / Q000187:drug effects / Q000502:physiology; D014158:Transcription, Genetic / Q000187:drug effects / Q000502:physiology
D022782:CCAAT-Enhancer-Binding Protein-beta; D017362:Cyclic AMP Response Element-Binding Protein; D016376:Oligonucleotides, Antisense; D011500:Protein Synthesis Inhibitors; D012333:RNA, Messenger; D000841:Anisomycin