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07:55
Imaging the Intracellular Trafficking of APP with Photoactivatable GFP
Published on: October 17, 2015
Sorting receptor SORLA--a trafficking path to avoid Alzheimer disease
Thomas E Willnow1, Olav M Andersen
1Max-Delbrueck-Center for Molecular Medicine, 13125 Berlin, Germany. willnow@mdc-berlin.de
Journal of Cell Science
|July 2, 2013
Summary
A newly identified receptor, SORLA, regulates the transport of amyloid precursor protein (APP) in neurons. Dysfunctional SORLA leads to increased amyloid beta production, a key factor in Alzheimer disease (AD) development.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- Alzheimer disease (AD) is linked to excessive amyloid precursor protein (APP) breakdown into neurotoxic amyloid beta (Aβ) peptides.
- APP processing is influenced by its intracellular trafficking route between cellular compartments.
Purpose of the Study:
- To elucidate the role of the sorting receptor SORLA in regulating APP trafficking and processing in neurons.
- To investigate the contribution of SORLA to Alzheimer disease pathogenesis.
Main Methods:
- Functional characterization of the SORLA receptor.
- Analysis of APP intracellular transport pathways.
- Investigation of SORLA's interaction with cytosolic adaptors.
Main Results:
- SORLA acts as a central regulator of APP trafficking, controlling its delivery to specific cellular compartments.
- SORLA restricts APP's access to endocytic pathways that promote amyloidogenic processing.
- Defects in SORLA or its adaptors cause APP transport issues and increased Aβ production.
Conclusions:
- SORLA plays a critical role in neuronal protein transport, specifically for APP.
- Impaired SORLA function is a risk factor for Alzheimer disease.
- Understanding this pathway offers insights into neurodegenerative disease mechanisms.
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