c-fos modulates brain-derived neurotrophic factor mRNA expression in mouse hippocampal CA3 and dentate gyrus neurons

Academic Article

Abstract

  • Excess neuronal excitation by glutamate induces neuron cell death, which may contribute to the pathogenesis of acute brain injuries and neurodegenerative diseases. Our previous studies using a mouse with hippocampal c-fos gene deletion showed that c-fos regulates neuronal excitability and excitotoxicity. Moreover, a delayed induction of brain-derived neurotrophic factor (BDNF) protein expression in response to kainic acid (KA) treatment was found in c-fos mutant mice compared to wildtype controls, suggesting that c-fos is important in the temporal control of BDNF induction. To further investigate mechanisms of in vivo regulation of c-fos on BDNF expression, we studied the expression of BDNF mRNA and its colocalization with c-Fos protein in the hippocampal formation in the presence and absence of KA. By in situ hybridization, we observed that the c-fos mutant and wildtype mice exhibited similar basal expression of BDNF in the absence of KA. In contrast, the KA-induced BDNF mRNA levels were significantly different in wildtype and c-fos mutant mice in CA3 and dentate gyrus regions. Our findings indicate that c-fos regulates expression of BDNF in distinct neuron populations of the hippocampal formation in vivo. © 2006 Elsevier Ireland Ltd. All rights reserved.
  • Published In

    Digital Object Identifier (doi)

    Author List

  • Dong M; Wu Y; Fan Y; Xu M; Zhang J
  • Start Page

  • 177
  • End Page

  • 180
  • Volume

  • 400
  • Issue

  • 1-2