Journal
JOURNAL OF ALZHEIMERS DISEASE
Volume 20, Issue 4, Pages 1003-1008Publisher
IOS PRESS
DOI: 10.3233/JAD-2010-091114
Keywords
Amyloid-beta protein precursor; dendrites; fasudil; hippocampus; intracerebroventricular infusion; presenilin-1; Rho GTPase; Rho kinase
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Funding
- Alzheimer's Drug Discovery Foundation
- Anna Fuller Predoctoral Fellowship
- NATIONAL CANCER INSTITUTE [R01CA133346] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE [R01NS039475] Funding Source: NIH RePORTER
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Amyloid-beta (A beta) overproduction and dendrite arbor atrophy are hallmarks of Alzheimer's disease. The RhoA GTPase (Rho) signals through Rho kinase (ROCK) to control cytoskeletal dynamics and regulate neuron structure. Hyperactive Rho signaling destabilizes neurons leading to dendritic regression that can be rescued by genetic or pharmacological reduction of ROCK signaling. To understand what effect reduced ROCK signaling has on the dendrite arbors of mice that overproduce A beta, we administered the ROCK inhibitor fasudil to A beta PP/PS1 transgenic mice. We report that increased dendrite branching occurs in A beta PP/PS1 mice and that fasudil promotes lengthening of the dendrite arbors of CA1 pyramidal neurons.
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