Fluorescent 1,4-Naphthoquinones To Visualize Diffuse and Dense-Core Amyloid Plaques in APP/PS1 Transgenic Mouse Brains

Title
Fluorescent 1,4-Naphthoquinones To Visualize Diffuse and Dense-Core Amyloid Plaques in APP/PS1 Transgenic Mouse Brains
Authors
박근완Naewoo Neo ShinHanna JeonYoungeun JungSeungyeop BaekSejin LeeHee Chan YooGi Hun BaeSeung-Hoon YangJung Min HanIkyon KimYoungSoo Kim
Issue Date
2019-06
Publisher
ACS Chemical Neuroscience
Citation
VOL 10, NO 6-3044
Abstract
Recent clinical approvals of brain imaging radiotracers targeting amyloid-β provided clinicians the tools to detect and confirm Alzheimer’s disease pathology without autopsy or biopsy. While current imaging agents are effective in postsymptomatic Alzheimer’s patients, there is much room for improvement in earlier diagnosis, hence prompting a need for new and improved amyloid imaging agents. Here we synthesized 41 novel 1,4-naphthoquinone derivatives and initially discovered 14 antiamyloidogenic compounds via in vitro amyloid-β aggregation assay; however, qualitative analyses of these compounds produced conflicting results and required further investigation. Follow-up docking and biophysical studies revealed that four of these compounds penetrate the blood-brain barrier, directly bind to amyloid-β aggregates, and enhance fluorescence properties upon interaction. These compounds specifically stain both diffuse and dense-core amyloid-β plaques in brain sections of APP/PS1 double transgenic Alzheimer’s mouse models. Our findings suggest 1,4-naphthoquinones as a new scaffold for amyloid-β imaging agents for early stage Alzheimer’s.
URI
http://pubs.kist.re.kr/handle/201004/70020
ISSN
1948-7193
Appears in Collections:
KIST Publication > Article
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