Mesoporous magnetic nanoparticles conjugated aptamers for exosomes capture and detection of Alzheimer's disease

• Published in: Engineered regeneration Vol. 4; no. 4; pp. 349 - 356
• Main Authors: Wang, Guidan, Pan, Zhenshan, Zhu, Xiaorui, Yang, Ruyue, Yang, Rong, Yang, Tingting, Hu, Dong, Jing, Aihua, Liang, Gaofeng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-12-2023; KeAi Communications Co., Ltd
• Subjects: Alzheimer's disease (AD); Capture; Detection; Exosomes; Alzheimer's disease (AD); Exosomes; Detection; Capture
• ISSN: 2666-1381; 2666-1381
• DOI: 10.1016/j.engreg.2023.04.007

•The magnetic nanoparticles were synthesized by hydrothermal are composed of a core of Fe3O4 and coupled with gold nanoparticles gives it a large specific surface area to effectively capture exosomes.•We introduced the sodium chloride elution strategy using 1 M sodium chloride to eluate the captured exosomes, which provides a possibility for the downstream diagnosis of disease.•The differences in exosomes analysis of clinical samples between healthy people and patients with AD provide a convenient method for the diagnosis of Alzheimer's disease.
Exosomes are nanoscale membrane-enclosed extracellular vesicles secreted by various cells, which have enormous potential as disease biomarkers for clinical application. However, the isolation and detection of exosomes remain enormous challenges, which limits their further application. Herein, inspired by immunomagnetic beads, a magnetic nanoparticle conjugated aptamer was repurposed for the effective capture and detection of exosomes. The magnetic nanoparticles, composed of Fe3O4 synthesized by the hydrothermal method as the core and coupled with gold nanoparticles (Fe3O4@Au), provide a large specific surface area, making the resulting composite material an effective platform for exosome capture. Furthermore, the elution of captured exosomes with 1.0 M NaCl made downstream analysis of exosomes possible. The preliminary clinical application value of the composite in exosome analyses of serum from healthy individuals and patients with Alzheimer's disease (AD) has also been verified, which could provide a promising platform for biomedical and clinical diagnosis.
[Display omitted]