Amyloid-β precursor protein (APP) mutations cause familial Alzheimer’s disease with virtually complete penetrance. We found an APP mutation (A673V) that causes disease only in the homozygous state, while heterozygous carriers were unaffected, consistent with a recessive Mendelian trait of inheritance. The A673V mutation affected APP processing, resulting in enhanced amyloid β (Aβ) production and formation of amyloid fibrils in vitro. Co-incubation of mutated and wild-type peptides conferred instability on Aβ aggregates and inhibited amyloidogenesis and neurotoxicity. The highly amyloidogenic effect of the A673V mutation in the homozygous state and its anti-amyloidogenic effect in the heterozygous state account for the autosomal recessive pattern of inheritance, and have implications for genetic screening and the potential treatment of Alzheimer’s disease.

(2012). Anti-amyloidogenicactivity of a mutant form of Aβ: a new strategy for Alzheimer therapy. (Tesi di dottorato, Università degli Studi di Milano-Bicocca, 2012).

Anti-amyloidogenicactivity of a mutant form of Aβ: a new strategy for Alzheimer therapy

CATANIA, MARCELLA
2012

Abstract

Amyloid-β precursor protein (APP) mutations cause familial Alzheimer’s disease with virtually complete penetrance. We found an APP mutation (A673V) that causes disease only in the homozygous state, while heterozygous carriers were unaffected, consistent with a recessive Mendelian trait of inheritance. The A673V mutation affected APP processing, resulting in enhanced amyloid β (Aβ) production and formation of amyloid fibrils in vitro. Co-incubation of mutated and wild-type peptides conferred instability on Aβ aggregates and inhibited amyloidogenesis and neurotoxicity. The highly amyloidogenic effect of the A673V mutation in the homozygous state and its anti-amyloidogenic effect in the heterozygous state account for the autosomal recessive pattern of inheritance, and have implications for genetic screening and the potential treatment of Alzheimer’s disease.
TAGLIAVINI, FABRIZIO
AMYLOID, APP, ABETA, ALZHEIMER
MED/26 - NEUROLOGIA
English
27-mar-2012
Scuola di Dottorato in Medicina Traslazionale e Molecolare
MEDICINA TRASLAZIONALE E MOLECOLARE (DIMET) - 45R
24
2010/2011
open
(2012). Anti-amyloidogenicactivity of a mutant form of Aβ: a new strategy for Alzheimer therapy. (Tesi di dottorato, Università degli Studi di Milano-Bicocca, 2012).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/29859
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