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Updated: Oct 9, 2025
Detecting Amyloid-β Accumulation via Immunofluorescent Staining in a Mouse Model of Alzheimer's Disease
Published on: April 19, 2021
Nanozyme sensor array based on manganese dioxide for the distinction between multiple amyloid β peptides and their
Shun Hu1, Changwen Yang1, Yanqing Li1
1Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China; MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China.
This study introduces a novel nanozyme sensor array for detecting amyloid β (Aβ) species and their aggregation. The system accurately distinguishes Aβ types and differentiates Alzheimer
Area of Science:
- Biochemistry
- Nanotechnology
- Analytical Chemistry
Background:
- Alzheimer's disease (AD) pathogenesis involves amyloid β (Aβ) peptide aggregation.
- Detecting transient Aβ aggregates is challenging due to their heterogeneous nature.
- Understanding Aβ aggregation is crucial for developing AD diagnostics and therapeutics.
Purpose of the Study:
- To develop a novel nanozyme sensor array for dynamic detection of Aβ species.
- To accurately distinguish between different types of Aβ aggregates.
- To establish a reliable biosensing system for AD diagnosis using clinical samples.
Main Methods:
- Constructed a two-dimensional manganese dioxide (MnO2) nanozyme sensor array.
- Modulated the peroxidase-mimicking activity of MnO2 nanozymes based on Aβ species.
- Utilized linear discriminant analysis (LDA) for data interpretation and classification.
Main Results:
- Successfully distinguished six types of Aβ within 1 hour.
- Achieved a dynamic detection range of 0.01-500 nmol/L and a detection limit of 0.44 pmol/L.
- Identified 100% of 30 unknown blind samples and distinguished healthy individuals from AD patients in clinical blood samples.
Conclusions:
- The developed MnO2 nanozyme sensor array offers a convenient and reliable system for detecting Aβ species.
- This biosensing approach can aid in understanding Aβ aggregation processes.
- The system shows potential for early AD diagnosis using blood samples.
