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Updated: Sep 28, 2025
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Detecting Amyloid-β Accumulation via Immunofluorescent Staining in a Mouse Model of Alzheimer's Disease
Published on: April 19, 2021
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Cross-Reactive Fluorescent Sensor Array for Discrimination of Amyloid Beta Aggregates
Pangmiaomiao Zhang1, Chunyan Tan1
1State Key Laboratory of Chemical Oncogenomics, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, People's Republic of China.
Analytical Chemistry
|April 1, 2022
Summary
This study developed a novel fluorescent sensor array to detect amyloid beta (Aβ) aggregates, crucial in Alzheimer's disease. The sensor array successfully distinguishes various Aβ species and monitors aggregation kinetics.
Area of Science:
- Biochemistry
- Neuroscience
- Materials Science
Background:
- Protein misfolding and aggregation are implicated in neurodegenerative diseases.
- Amyloid beta (Aβ) aggregation is a key factor in Alzheimer's disease pathogenesis.
Purpose of the Study:
- To develop a fluorescent sensor array for detecting and distinguishing various amyloid beta (Aβ) aggregate species.
- To monitor Aβ aggregation kinetics and pathways.
Main Methods:
- Fabrication of a fluorescent sensor array using conjugated polyelectrolytes and organic dye probes (PPE1-Thioflavin T and PPESO3-Nile Red).
- Application of pattern recognition algorithms (linear discriminant analysis, hierarchical clustering analysis) for data analysis.
Main Results:
- The sensor array successfully distinguished between Aβ monomers and three distinct aggregate species: oligomers, protofibrils, and fibrils.
- The array monitored aggregation kinetics and differentiated between on- and off-aggregate pathways.
- Demonstrated simultaneous detection of Aβ aggregates in mixtures.
Conclusions:
- The developed fluorescent sensor array offers a convenient and effective approach for simultaneous detection of Aβ aggregates.
- This method has potential applications in analyzing other disease-related protein aggregates.
