A requirement of nuclear factor-κB activation in fear-potentiated startle

Shiu Hwa Yeh, Chia Ho Lin, Ching Fen Lee, Po-Wu Gean

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

Previous studies have shown that biochemical changes that occur in the amygdala during fear conditioning in vivo are similar to those occur during long term potentiation (LTP) in vitro. Electrophoretic mobility shift assay of nuclear extracts from startle-potentiated rats showed a selective increase in the amygdala of nuclear factor-κB (NF-κB) DNA binding activity. Supershift experiments further indicated that p65 and p50 subunits but not c-Rel were involved in DNA binding. The protein levels of IκB-α were reduced by treatments that reliably induced LTP in this area of the brain. This was accompanied by a decrease of NF-κB in the cytoplasm concomitant with an increase in the nucleus. Quantitative analysis of IκB kinase activity demonstrated that fear training led to an increase in kinase activity, and this effect was inhibited by thalidomide. Paralleled behavioral tests revealed that thalidomide inhibited fear-potentiated startle. Intra-amygdala administration of κB decoy DNA prior to training impaired fear-potentiated startle as well as LTP induction. Similarly, NF-κB inhibitors blocked IκB-α degradation and startle response. These results provide the first evidence of a requirement of NF-κB activation in the amygdala for consolidation of fear memory.

Original languageEnglish
Pages (from-to)46720-46729
Number of pages10
JournalJournal of Biological Chemistry
Volume277
Issue number48
DOIs
Publication statusPublished - 2002 Nov 29

Fingerprint

Fear
Amygdala
Thalidomide
Chemical activation
Long-Term Potentiation
DNA
Phosphotransferases
Electrophoretic mobility
Corrosion inhibitors
Startle Reflex
Consolidation
Rats
Assays
Brain
Data storage equipment
Electrophoretic Mobility Shift Assay
Degradation
Chemical analysis
Cytoplasm
Proteins

All Science Journal Classification (ASJC) codes

  • Biochemistry

Cite this

Yeh, Shiu Hwa ; Lin, Chia Ho ; Lee, Ching Fen ; Gean, Po-Wu. / A requirement of nuclear factor-κB activation in fear-potentiated startle. In: Journal of Biological Chemistry. 2002 ; Vol. 277, No. 48. pp. 46720-46729.
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A requirement of nuclear factor-κB activation in fear-potentiated startle. / Yeh, Shiu Hwa; Lin, Chia Ho; Lee, Ching Fen; Gean, Po-Wu.

In: Journal of Biological Chemistry, Vol. 277, No. 48, 29.11.2002, p. 46720-46729.

Research output: Contribution to journalArticle

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