Abstract
APP is a precursor of β amyloid deposited in Alzheimer's disease (AD). Although genetic studies established that mutations in APP cause familial AD (FAD), the mechanism for neuronal death by FAD mutants has not been well understood. We established neuronal cells (F11/EcR/V642I cells) in which V642I APP was inducibly expressed by ecdysone. Treatment with ecdysone, but not vehicle, killed most cells within a few days, with rounding, shrinkage, and detachment as well as nuclear fragmentation. Death was suppressed by Ac-DEVD-CHO and pertussis toxin. Electron microscopic analysis revealed that apoptosis occurred in ecdysone-treated cells. V642I-APP-induced death was suppressed by the anti-AD factors estrogen and apoE2. These data demonstrate not only that expression of this FAD gene causes neuronal apoptosis, but that F11/EcR/V642I cells, the first neuronal cells with inducible FAD gene expression, provide a useful model system in investigating AD disorders. (C) 2000 Academic Press.
Original language | English |
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Pages (from-to) | 445-454 |
Number of pages | 10 |
Journal | Biochemical and Biophysical Research Communications |
Volume | 274 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2000 Aug 2 |
Externally published | Yes |
Keywords
- Alzheimer's disease
- Amyloid precursor protein
- Anti-risk factor
- Apoptosis
- Caspase inhibitor
- Disease mutation
- Ecdysone-inducible system
- Electron microscopy
- Neuronal death
- Pertussis toxin
ASJC Scopus subject areas
- Biophysics
- Biochemistry
- Molecular Biology
- Cell Biology