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Updated: Apr 29, 2026

Purification and Aggregation of the Amyloid Precursor Protein Intracellular Domain
Published on: August 28, 2012
FoxO mediates APP-induced AICD-dependent cell death.
11] Department of Interventional Radiology, Shanghai 10th People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Science and Technology, Tongji University, Shanghai, China [2].
Alzheimer's disease protein APP triggers cell death via its AICD fragment, which interacts with the FoxO protein. This interaction promotes the transcription of cell death genes, highlighting a new pathway in AD pathogenesis.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Alzheimer's disease (AD) pathogenesis is linked to amyloid precursor protein (APP) fragments.
- Amyloid beta (Aβ) peptides are primary suspects, but the role of APP intracellular domain (AICD) is less understood.
Purpose of the Study:
- To investigate the role of AICD in APP-induced cell death.
- To identify downstream mediators of AICD's effects.
Main Methods:
- Utilized Drosophila models for genetic screening and cell death assays.
- Investigated protein interactions and nuclear translocation in mammalian cells.
- Analyzed the transcriptional regulation of pro-apoptotic genes.
Main Results:
- APP induces AICD-dependent cell death in Drosophila.
- Forkhead box O (FoxO) transcription factor identified as a key mediator of APP-induced cell death and locomotion defects.
- AICD interacts with FoxO, co-localizes to the nucleus under oxidative stress, and enhances FoxO-driven transcription of the pro-apoptotic gene Bim.
Conclusions:
- APP influences cell death through AICD, acting as a transcriptional co-activator for FoxO.
- This AICD-FoxO pathway represents a novel mechanism in Alzheimer's disease pathology.
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