Destabilization of β-catenin by mutations in presenilin-1 potentiates neuronal apoptosis

Zhuohua Zhang, Henrike Hartmann, Viet Minh Do, Dorothee Abramowski, Christine Sturchler-Pierrat, Matthias Staufenbiel, Bernd Sommer, Marc Van De Wetering, Hans Clevers, Paul Saftig, Bart De Strooper, Xi He, Bruce A. Yankner

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483 Citaten (Scopus)

Samenvatting

Mutations of the presenilin-1 gene are a major cause of familial early- onset Alzheimer's disease. Presenilin-1 can associate with members of the catenin family of signalling proteins, but the significance of this association is unknown. Here we show that presenilin-1 forms a complex with β-catenin in vivo that increases β-catenin stability. Pathogenic mutations in the presenilin-1 gene reduce the ability of presenilin-1 to stabilize β- catenin, and lead to increased degradation of β-catenin in the brains of transgenic mice. Moreover, β-catenin levels are markedly reduced in the brains of Alzheimer's disease patients with presenilin-1 mutations. Loss of β-catenin signalling increases neuronal vulnerability to apoptosis induced by amyloid-β protein. Thus, mutations in presenilin-1 may increase neuronal apoptosis by altering the stability of β-catenin, predisposing individuals to early-onset Alzheimer's disease.

Originele taal-2Engels
Pagina's (van-tot)698-702
Aantal pagina's5
TijdschriftNature
Volume395
Nummer van het tijdschrift6703
DOI's
StatusGepubliceerd - 15 okt. 1998
Extern gepubliceerdJa

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