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Dried Blood Spot Collection of Health Biomarkers to Maximize Participation in Population Studies
Published on: January 28, 2014
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Biomarkers
YoungSoo Kim1,2, Illhwan Cho2, Sunhee Lee2
1Amyloid Solution Inc., Seongnam, Gyeonggi-do, Korea, Republic of (South).
Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 26, 2025
Summary
A new fluorescent compound, AS-YFluor, can detect amyloid-β42 (Aβ42) oligomers in blood plasma. This Alzheimer's disease (AD) biomarker detection tool shows promise for early AD diagnosis and monitoring disease progression.
Area of Science:
- Neuroscience
- Biochemistry
- Medical Diagnostics
Background:
- Amyloid-β42 (Aβ42) oligomers are key neurotoxic biomarkers implicated in Alzheimer's disease (AD) pathogenesis and progression.
- Current diagnostic tools for early-stage AD and preclinical detection of Aβ42 oligomers are limited, hindering clinical trial efficacy.
- Novel imaging probes are crucial for elucidating the role of Aβ42 oligomers and supporting early AD diagnosis.
Purpose of the Study:
- To introduce AS-YFluor, a novel fluorescent compound designed for selective detection of Aβ42 oligomers.
- To evaluate the diagnostic potential of AS-YFluor in distinguishing Alzheimer's disease patients from controls using blood plasma.
- To assess the utility of AS-YFluor in monitoring AD progression and differentiating between various cognitive states.
Main Methods:
- In vitro assays were performed to confirm the selectivity of AS-YFluor for Aβ42 oligomers.
- Diagnostic potential was assessed using biological samples (brain lysate, CSF, blood) from 5XFAD transgenic mice and controls.
- AS-YFluor was applied to blood plasma samples from 165 human participants (NC, AD, MCI, non-AD dementia) to analyze fluorescence signals.
Main Results:
- AS-YFluor demonstrated high specificity for Aβ42 oligomers, showing no cross-reactivity with other protein species or abundant blood proteins.
- The compound effectively differentiated between samples from 5XFAD mice and controls, validating its use in biological matrices.
- In human studies, AS-YFluor distinguished AD patients from normal controls and non-AD dementia subjects with high accuracy (>93% sensitivity and specificity for MCI vs. AD/NC).
Conclusions:
- AS-YFluor is a novel fluorescent agent capable of selectively detecting Aβ42 oligomer levels in the blood of Alzheimer's disease patients.
- The compound shows significant promise as a blood-based diagnostic tool for early AD detection and monitoring disease progression.
- AS-YFluor's versatility extends to non-clinical research applications for studying oligomer behavior.
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