VEGF, a mediator of the effect of experience on hippocampal neurogenesis.

Abstract:

:Rodents housed in an enriched environment, exercise by running or perform learning and memory tasks show an increase in hippocampal neurogenesis. We show that both environmental enrichment, as well as performance in the Morris water maze, a hippocampal-dependent learning task, leads to an increase in local VEGF expression in rats. We genetically recreated this situation by somatic cell gene transfer using recombinant adeno-associated virus (AAV) vectors. Genetically increasing hippocampal VEGF in adult rats resulted in a approximately 2 fold increase in neurogenesis associated with improved cognition. In contrast, gene transfer of placental growth factor (PGF) which signals through Flt1, but not KDR receptors had negative effects on neurogenesis and inhibited learning, although it similarly increased endothelial cell proliferation. Expression of a dominant negative, mKDR, inhibited basal neurogenesis and impaired learning. Co-expression of mKDR antagonized VEGF-enhanced neurogenesis and learning without inhibiting endothelial cell proliferation. Furthermore, inhibition of VEGF expression by RNA interference completely blocked the environmental induction of neurogenesis. These data support a model whereby VEGF acting via KDR is a mediator of the effect of the environment on neurogenesis and cognition [1].

journal_name

Curr Alzheimer Res

authors

During MJ,Cao L

doi

10.2174/156720506775697133

keywords:

subject

Has Abstract

pub_date

2006-02-01 00:00:00

pages

29-33

issue

1

eissn

1567-2050

issn

1875-5828

journal_volume

3

pub_type

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