Visualization of Apolipoprotein E-Binding Amyloid Plaques in Postmortem Alzheimer’s Disease Brains Using a Novel Fluorescent Probe THK-5320
Bibliographic record
Abstract
( E )-2-(4-(dimethylamino)styryl)- N, N -dimethylquinolin-6-amine) (THK-5320) is a unique fluorescent compound that recognizes apolipoprotein E (ApoE)-binding amyloid plaques in postmortem human brain sections. To understand the distinctive characteristics of THK-5320 chemically and biologically, its fluorescence properties were investigated, and the association of the fluorescence wavelength with plaque subtypes and amyloid isoforms was explored. Blue plaques visualized with THK-5320 were consistent with those with anti-amyloid-β 1–16 /amyloid-β N3pE -stained antibodies, whereas red plaques visualized with THK-5320 were consistent with those with an ApoE-stained antibody in postmortem brain sections from patients with Alzheimer’s disease. In contrast, the amyloid positron emission tomography (PET) tracer PiB and its fluorescent derivative did not show significant signals in ApoE-binding plaques, whereas the signals correlated well with those of amyloid-β N3pE -positive plaques. Thus, THK-5320 may detect ApoE-binding amyloid plaques that conventional amyloid PET probes cannot detect. Multispectral fluorescence imaging with THK-5320 could be a useful tool to better understand the role of ApoE in amyloid pathology.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".