ApoER2 Increases Aβ Production and Affects APP Trafficking
Author Information
Author(s): Rodrigo A Fuentealba, Maria Ines Barría, Jiyeon Lee, C Judy Cam, Claudia Araya, Claudia A Escudero, Nibaldo C Inestrosa, Francisca C Bronfman, Guojun Bu, Maria-Paz Marzolo
Primary Institution: Pontificia Universidad Católica de Chile
Hypothesis
How does ApoER2 influence the processing and trafficking of amyloid precursor protein (APP) and the production of amyloid-β (Aβ)?
Conclusion
ApoER2 expression increases Aβ production by promoting APP association with lipid rafts and enhancing γ-secretase activity while decreasing APP internalization.
Supporting Evidence
- ApoER2 interacts with APP and increases its levels at the cell surface.
- ApoER2 expression correlates with increased Aβ production.
- ApoER2 decreases APP internalization rates.
- ApoER2 enhances γ-secretase activity.
- ApoER2 increases APP association with lipid rafts.
Takeaway
ApoER2 helps make more of a harmful protein called Aβ by changing how another protein, APP, is handled in cells.
Methodology
The study used CHO cells lacking LRP1 to analyze the effects of ApoER2 on APP trafficking and processing through various assays including co-immunoprecipitation and endocytosis measurements.
Limitations
The study was conducted in cell lines, which may not fully replicate the complexity of in vivo conditions.
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website