Abstract
Cerebral amyloid angiopathy (CAA) is common in Alzheimer's disease (AD) and may contribute to dementia and cerebral hemorrhage. Parenchymal β-amyloid deposition is dependent on the activity of zinc transporter 3 (ZnT3), a neocortical synaptic vesicle membrane protein that causes enrichment of exchangeable Zn2+in the vesicle, which is externalized on neurotransmission. However, the contribution of zinc to vascular β-amyloid deposition remains unclear. Here, we identify for the first time an exchangeable pool of Zn2+in the cerebrovascular wall of normal mice. This histochemically reactive Zn2+is enriched in CAA in a transgenic mouse model of AD (Tg2576), and a dramatic reduction of CAA occurs after targeted disruption of theZnt3gene in these mice. Also, inZnt3knock-out mice, the amount of exchangeable Zn2+[detected byN-(6-methoxy-8-quinolyl)-p-carboxybenzoylsulphonamide (TFL-Zn)] in the perivascular space was significantly decreased in the neocortex but not in peripheral organs. ZnT3 was not detected in the cerebral vessel walls or in blood components of wild-type mice. Thus, synaptic ZnT3 activity may promote CAA by indirectly raising exchangeable Zn2+concentrations in the perivascular spaces of the brain.
Bibliography
Friedlich, A. L., Lee, J.-Y., van Groen, T., Cherny, R. A., Volitakis, I., Cole, T. B., Palmiter, R. D., Koh, J.-Y., & Bush, A. I. (2004). Neuronal Zinc Exchange with the Blood Vessel Wall Promotes Cerebral Amyloid Angiopathy in an Animal Model of Alzheimerâs Disease. The Journal of Neuroscience, 24(13), 3453â3459.
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Dates
Type | When |
---|---|
Created | 21 years, 4 months ago (March 31, 2004, 3:47 p.m.) |
Deposited | 2 years, 4 months ago (April 13, 2023, 12:06 p.m.) |
Indexed | 11 months, 2 weeks ago (Sept. 12, 2024, 5:22 p.m.) |
Issued | 21 years, 5 months ago (March 31, 2004) |
Published | 21 years, 5 months ago (March 31, 2004) |
Published Online | 21 years, 5 months ago (March 31, 2004) |
Published Print | 21 years, 5 months ago (March 31, 2004) |
@article{Friedlich_2004, title={Neuronal Zinc Exchange with the Blood Vessel Wall Promotes Cerebral Amyloid Angiopathy in an Animal Model of Alzheimer’s Disease}, volume={24}, ISSN={1529-2401}, url={http://dx.doi.org/10.1523/jneurosci.0297-04.2004}, DOI={10.1523/jneurosci.0297-04.2004}, number={13}, journal={The Journal of Neuroscience}, publisher={Society for Neuroscience}, author={Friedlich, Avi L. and Lee, Joo-Yong and van Groen, Thomas and Cherny, Robert A. and Volitakis, Irene and Cole, Toby B. and Palmiter, Richard D. and Koh, Jae-Young and Bush, Ashley I.}, year={2004}, month=mar, pages={3453–3459} }