Abstract:
:Raf kinases are downstream effectors of Ras and upstream activators of the MEK-ERK cascade. Ras and MEK-ERK signaling play roles in learning and memory (L&M) and neural plasticity, but the roles of Raf kinases in L&M and plasticity are unclear. Among Raf isoforms, B-raf is preferentially expressed in the brain. To determine whether B-raf has a role in synaptic plasticity and L&M, we used the Cre-LoxP gene targeting system to derive forebrain excitatory neuron B-raf knockout mice. This conditional knockout resulted in deficits in ERK activation and hippocampal long-term potentiation (LTP) and impairments in hippocampus-dependent L&M, including spatial learning and contextual discrimination. Despite the widespread expression of B-raf, this mutation did not disrupt other forms of L&M, such as cued fear conditioning and conditioned taste aversion. Our findings demonstrate that B-raf plays a role in hippocampal ERK activation, synaptic plasticity, and L&M.
journal_name
J Neurosci Resjournal_title
Journal of neuroscience researchauthors
Chen AP,Ohno M,Giese KP,Kühn R,Chen RL,Silva AJdoi
10.1002/jnr.20703keywords:
subject
Has Abstractpub_date
2006-01-01 00:00:00pages
28-38issue
1eissn
0360-4012issn
1097-4547journal_volume
83pub_type
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