|
KMID : 0578320140370010024
|
|
Molecules and Cells
2014 Volume.37 No. 1 p.24 ~ p.30
|
|
|
Impaired Extinction of Learned Contextual Fear Memory in Early Growth Response 1 Knockout Mice
|
|
Han Seung-Rie
Hong Soon-Taek
Mo Ji-Won
Lee Dong-Min
Choi Eun-Ju
Choi June-Seek
Sun Woong
Lee Hyun-Woo
Kim Hyun
|
|
|
Abstract
|
|
|
|
Inductive expression of early growth response 1 (Egr-1) in neurons is associated with many forms of neuronal activity. However, only a few Egr-1 target genes are known in the brain. The results of this study demonstrate that Egr-1 knockout (KO) mice display impaired contextual extinction learning and normal fear acquisition relative to wild-type (WT) control animals. Genome-wide microarray experiments revealed 368 differentially expressed genes in the hippocampus of Egr-1 WT exposed to different phases of a fear conditioning paradigm compared to gene expression profiles in the hippocampus of KO mice. Some of genes, such as serotonin receptor 2C (Htr2c), neuropeptide B (Npb), neuronal PAS domain protein 4 (Npas4), NPY receptor Y1 (Npy1r), fatty acid binding protein 7 (Fabp7), and neuropeptide Y (Npy) are known to regulate processing of fearful memories, and promoter analyses demonstrated that several of these genes contained Egr-1 binding sites. This study provides a useful list of potential Egr-1 target genes which may be regulated during fear memory processing.
|
|
|
KEYWORD
|
|
|
contextual fear conditioning, Egr-1, extinction, hippocampus, microarray
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
  
|