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Detection of Exosomal Biomarker by Electric Field-induced Release and Measurement EFIRM
Published on: January 23, 2015
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Nanoelectrical characterization of individual exosomes secreted by Aβ42-ingested cells using electrostatic force
Yeseong Choi1,2, Su-Mi Kim2,3, Youhee Heo2,4
1Bio-convergence Engineering, Korea University, Seoul, Republic of Korea.
Nanotechnology
|September 21, 2020
Summary
Alzheimer
Area of Science:
- Neuroscience
- Biochemistry
- Cell Biology
Background:
- Alzheimer's disease pathogenesis involves amyloid-β42 (Aβ42) transfer.
- Understanding how Aβ42 affects exosome physical properties is limited due to a lack of tools.
- Exosomes are implicated in the intercellular transfer of disease-associated proteins.
Purpose of the Study:
- To investigate the physical properties of exosomes containing Aβ42.
- To determine the relationship between Aβ42 concentration and exosome physical characteristics.
- To explore the role of neuronal exosomes in neurodegenerative disease propagation.
Main Methods:
- Utilized electrostatic force microscopy to probe individual exosomes.
- Quantified physical properties of exosomes secreted by neuroblastoma cells.
- Varied the concentration of amyloid-β42 oligomers supplied to cells.
Main Results:
- Exosome surface charge increased with higher concentrations of Aβ42 oligomers.
- Higher Aβ42 concentration in cell media correlated with increased Aβ42 content in exosomes.
- Exosomes function as transport vesicles for Aβ42.
Conclusions:
- Exosome surface charge is a quantifiable indicator of internal Aβ42 content.
- Neuronal exosomes play a role in the spread of neurodegenerative diseases.
- This approach may aid in the early diagnosis of neurodegenerative conditions.
