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© Research
Publication : Learning & memory (Cold Spring Harbor, N.Y.)

Endogenous BDNF is required for long-term memory formation in the rat parietal cortex

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Learning & memory (Cold Spring Harbor, N.Y.) - 01 Sep 2005

Alonso M, Bekinschtein P, Cammarota M, Vianna MR, Izquierdo I, Medina JH

Link to Pubmed [PMID] – 16204202

Learn. Mem. 2005 Sep-Oct;12(5):504-10

Information storage in the brain is a temporally graded process involving different memory phases as well as different structures in the mammalian brain. Cortical plasticity seems to be essential to store stable long-term memories, although little information is available at the moment regarding molecular and cellular events supporting memory consolidation in the neocortex. Brain-derived neurotrophic factor (BDNF) modulates both short-term synaptic function and activity-dependent synaptic plasticity in hippocampal and cortical neurons. We have recently demonstrated that endogenous BDNF in the hippocampus is involved in memory formation. Here we examined the role of BDNF in the parietal cortex (PCx) in short-term (STM) and long-term memory (LTM) formation of a one-trial fear-motivated learning task in rats. Bilateral infusions of function-blocking anti-BDNF antibody into the PCx impaired both STM and LTM retention scores and decreased the phosphorylation state of cAMP response element-binding protein (CREB). In contrast, intracortical administration of recombinant human BDNF facilitated LTM and increased CREB activation. Moreover, inhibitory avoidance training is associated with a rapid and transient increase in phospho-CREB/total CREB ratio in the PCx. Thus, our results indicate that endogenous BDNF is required for both STM and LTM formation of inhibitory avoidance learning, possibly involving CREB activation-dependent mechanisms. The present data support the idea that early sensory areas constitute important components of the networks subserving memory formation and that information processing in neocortex plays an important role in memory formation.

http://www.ncbi.nlm.nih.gov/pubmed/16204202