Vitamin E but not 17B-estradiol protect against vascular toxicity induced by B-amyloid wild type and the Dutch amyploid variant

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• dc.contributor.author Muñoz López, Francisco José, 1964-ca
• dc.contributor.author Opazo, Carlos M.ca
• dc.contributor.author Gil Gómez, Gabrielca
• dc.contributor.author Tapia, Gladysca
• dc.contributor.author Fernández, Virginiaca
• dc.contributor.author Valverde, M. A. (Miguel Ángel), 1963-ca
• dc.contributor.author Inestrosa, Nibaldo C.ca
• dc.date.accessioned 2012-07-05T06:54:12Z
• dc.date.available 2012-07-05T06:54:12Z
• dc.date.issued 2002ca
• dc.description.abstract Amyloid β-peptide (Aβ) fibril deposition on cerebral vessels produces cerebral amyloid angiopathy that appears in the majority of Alzheimer's disease patients. An early onset of a cerebral amyloid angiopathy variant called hereditary cerebral hemorrhage with amyloidosis of the Dutch type is caused by a point mutation in Aβ yielding AβGlu22→Gln. The present study addresses the effect of amyloid fibrils from both wild-type and mutated Aβ on vascular cells, as well as the putative protective role of antioxidants on amyloid angiopathy. For this purpose, we studied the cytotoxicity induced by Aβ1–40 Glu22→Gln and Aβ1–40 wild-type fibrils on human venule endothelial cells and rat aorta smooth muscle cells. We observed that AβGlu22→Gln fibrils are more toxic for vascular cells than the wild-type fibrils. We also evaluated the cytotoxicity of Aβ fibrils bound with acetylcholinesterase (AChE), a common component of amyloid deposits. Aβ1–40 wild-type–AChE fibrillar complexes, similar to neuronal cells, resulted in an increased toxicity on vascular cells. Previous reports showing that antioxidants are able to reduce the toxicity of Aβ fibrils on neuronal cells prompted us to test the effect of vitamin E, vitamin C, and 17β-estradiol on vascular damage induced by Aβwild-type and AβGlu22→Gln. Our data indicate that vitamin E attenuated significantly the Aβ-mediated cytotoxicity on vascular cells, although 17β-estradiol and vitamin C failed to inhibit the cytotoxicity induced by Aβ fibrils.
• dc.format.mimetype application/pdfca
• dc.identifier.citation Muñoz FJ, Opazo C, Gil-Gómez G, Tapia G, Fernández V, Valverde MA et al. Vitamin E but not 17B-estradiol protect against vascular toxicity induced by B-amyloid wild type and the Dutch amyploid variant. J. Neurosci. 2002;22(8):3081-89. DOI: 10.1523/jneurosci.22-08-03081.2002ca
• dc.identifier.doi http://dx.doi.org/10.1523/jneurosci.22-08-03081.2002
• dc.identifier.issn 0270-6474ca
• dc.identifier.uri http://hdl.handle.net/10230/16666
• dc.language.iso engca
• dc.publisher Society for Neuroscienceca
• dc.relation.ispartof Journal of Neuroscience. 2002;22(8):3081-89
• dc.rights © 2002, Society for Neuroscience. The published version is available at: http://www.jneurosci.org/content/22/8/3081ca
• dc.rights.accessRights info:eu-repo/semantics/openAccess
• dc.subject.keyword Alzheimer’s disease
• dc.subject.keyword CAA
• dc.subject.keyword HCHWA-D
• dc.subject.keyword Amyloid
• dc.subject.keyword Vitamin E
• dc.subject.keyword 17B-estradiol
• dc.subject.keyword Vitamin C
• dc.subject.keyword Oxidative stress
• dc.subject.keyword Acetylcholinesterase
• dc.subject.keyword Endothelial cells
• dc.subject.keyword Vascular smooth muscle cells
• dc.subject.other Alzheimer, Malaltia d' -- Fisiologia patològica
• dc.subject.other Proteïna beta-amiloide
• dc.subject.other Estrès oxidatiu -- Fisiologia patològica
• dc.title Vitamin E but not 17B-estradiol protect against vascular toxicity induced by B-amyloid wild type and the Dutch amyploid variantca
• dc.type info:eu-repo/semantics/articleca
• dc.type.version info:eu-repo/semantics/publishedVersion