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Updated: Aug 20, 2025
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Published on: March 28, 2025
MicroRNA super-resolution imaging in blood for Alzheimer's disease
Mirae Lee1, Jiwon Woo2, Sang Tae Kim3
1Department of Neurosurgery, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722; The Spine and Spinal Cord Institute, Department of Neurosurgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273; Biomedical Research Center, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, Korea.
Abstract:
We propose a novel blood biomarker detection method that uses miRNA super-resolution imaging to enable the early diagnosis of Alzheimer's disease (AD). Here, we report a singlemolecule detection method for visualizing disease-specific miRNA in tissue from an AD mice model, and peripheral blood mononuclear cells (PBMCs) from AD patients. Using optimized Magnified Analysis of Proteome (MAPs), we confirmed that five miRNAs contribute to neurodegenerative disease in the brain hippocampi of 5XFAD and wild-type mice. We also assessed PBMCs isolated from the whole blood of AD patients and a healthy control group, and subsequently analyzed those samples using miRNA super-resolution imaging. We detected more miR-200a-3p expression in the cornu ammonis 1 and dentate gyrus regions of 3 month-old 5XFAD mice than in wild-type mice. Additionally, miRNA super-resolution imaging of blood provides AD diagnosis platform for studying miRNA regulation inside cells at the single molecule level. Our results present a potential liquid biopsy method that could improve the diagnosis of early stage AD and other diseases. [BMB Reports 2023; 56(3): 190-195].
Insights
This study introduces a new method using miRNA super-resolution imaging for early Alzheimer's disease (AD) diagnosis. This blood test could potentially detect AD biomarkers, improving early detection and treatment strategies.
Area of Science:
- Biomedical Imaging
- Molecular Biology
- Neuroscience
Background:
- Alzheimer's disease (AD) diagnosis relies on clinical symptoms and costly imaging, lacking early, accessible biomarkers.
- MicroRNAs (miRNAs) are implicated in neurodegenerative diseases, but their visualization in vivo for diagnostic purposes remains challenging.
Discussion:
- This research presents a novel miRNA super-resolution imaging technique for visualizing disease-specific miRNAs.
- The method was validated in an AD mouse model (5XFAD) and in peripheral blood mononuclear cells (PBMCs) from AD patients.
- Magnified Analysis of Proteome (MAPs) identified five key miRNAs contributing to neurodegeneration in mouse brains.
Key Insights:
- Single-molecule detection of miR-200a-3p was enhanced in specific brain regions of 5XFAD mice compared to wild-type.
- miRNA super-resolution imaging of blood offers a platform for studying intracellular miRNA regulation at the single-molecule level.
- This technique demonstrates potential as a liquid biopsy for early AD diagnosis.
Outlook:
- Further validation in larger patient cohorts is necessary to establish this method as a clinical diagnostic tool.
- The approach may be adaptable for early detection of other diseases characterized by specific miRNA expression patterns.
- This work paves the way for non-invasive, sensitive diagnostic methods in neurodegenerative disease research.
