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• W2012805935 abstract "Neurons, astrocytes, and blood vessels are organized in functional “neurovascular units” in which the vasculature can impact neuronal activity and, in turn, dynamically adjust to its change. Here we explored different mechanisms by which VEGF, a pleiotropic factor known to possess multiple activities vis-à-vis blood vessels and neurons, may affect adult neurogenesis and cognition. Conditional transgenic systems were used to reversibly overexpress VEGF or block endogenous VEGF in the hippocampus of adult mice. Importantly, this was done in settings that allowed the uncoupling of VEGF-promoted angiogenesis, neurogenesis, and memory. VEGF overexpression was found to augment all three processes, whereas VEGF blockade impaired memory without reducing hippocampal perfusion or neurogenesis. Pertinent to the general debate regarding the relative contribution of adult neurogenesis to memory, we found that memory gain by VEGF overexpression and memory impairment by VEGF blockade were already evident at early time points at which newly added neurons could not yet have become functional. Surprisingly, VEGF induction markedly increased in vivo long-term potentiation (LTP) responses in the dentate gyrus, and VEGF blockade completely abrogated LTP. Switching off ectopic VEGF production resulted in a return to a normal memory and LTP, indicating that ongoing VEGF is required to maintain increased plasticity. In summary, the study not only uncovered a surprising role for VEGF in neuronal plasticity, but also suggests that improved memory by VEGF is primarily a result of increasing plasticity of mature neurons rather than the contribution of newly added hippocampal neurons." @default.
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• W2012805935 date "2011-03-08" @default.
• W2012805935 modified "2023-10-03" @default.
• W2012805935 title "Reversible modulations of neuronal plasticity by VEGF" @default.
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• W2012805935 doi "https://doi.org/10.1073/pnas.1007640108" @default.
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