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Precise profiling of exosomal biomarkers via programmable curved plasmonic nanoarchitecture-based biosensor for clinical diagnosis of Alzheimer's disease
Abstract
Alzheimer's disease (AD) is a neurodegenerative disease of complex pathogenesis, with overt symptoms following disease progression. Early AD diagnosis is challenging due to the lack of robust biomarkers and limited patient access to diagnostics via neuroimaging and cerebrospinal fluid (CSF) tests. Exosomes present in body fluids are attracting attention as diagnostic biomarkers that directly reflect neuropathological features within the brain. In particular, exosomal miRNAs (exomiRs) signatures are involved in AD pathogenesis, showing a different expression between patients and the healthy controls (HCs). However, low yield and high homologous nature impede the accuracy and reproducibility of exosome blood-based AD diagnostics. Here, we developed a programmable curved plasmonic nanoarchitecture-based biosensor to analyze exomiRs in clinical serum samples for accurate AD diagnosis. To allow the detection of exomiRs in serum at attomolar levels, nanospaces (e.g., nanocrevice and nanocavity) were introduced into the nanostructures to dramatically increase the spectral sensitivity by adjusting the bending angle of the plasmonic nanostructure through sodium chloride concentration control. The developed biosensor classifies individuals into AD, mild cognitive impairment (MCI) patients, and HCs through profiling and quantifying exomiRs. Furthermore, integrating analysis expression patterns of multiple exosomal biomarkers improved serum-based diagnostic performance (average accuracy…
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“For example, Song and colleagues developed a biosensor able to build a precise profile of exosomal miRNAs with a diagnostic aim for AD and mild cognitive impairment [65].”
From miR-92a-3p and miR-320a are Upregulated in Plasma Neuron-Derived Extracellular Vesicles of Patients with Frontotemporal Dementia (2025) · cites this paper as [65]
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Metadata
- Authors
- Song, S., Lee, J. U., Jeon, M. J., Kim, S., Lee, C.-N., & Sim, S. J.
- Venue
- Biosensors and Bioelectronics
- Publisher
- Elsevier BV
- Published
- 2023-06
- Volume
- 230
- Pages
- 115269
- ISSN
- 0956-5663
- Cited by
- 34
- References
- 5
- Language
- en
- Licence
- Funders
- National Research Foundation of Korea (RS-2023-00208846 / NRF-2020R1A5A1018052)
- Korea Dementia Research Center
- Korea Ministry of Science and ICT
- Ministry of Education (2022R1I1A3071724)
- Korea University Anam Hospital (IRB-0201AN0286)
- Ministry of Science, ICT and Future Planning
- Ministry of Health and Welfare (HU21C0335)
- Korea Health Industry Development Institute
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