1. An automated microliter-scale high-throughput screening system (MSHTS) for real-time monitoring of protein aggregation using quantum-dot nanoprobes
- Author
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Hitomi Nakao, Kiyotaka Tokuraku, Yoshiteru Oshima, Rina Sasaki, Masafumi Sakono, Hadya Virupaksha Deepak, Reina Tainaka, Yuichi Ando, Kiminori Ohta, Haruhisa Kikuchi, Koji Uwai, Masaki Anetai, Yasuyuki Endo, Kenji Monde, Yuta Murai, Yoshiko Suga, Ikuko Ito, and Yurika Hashi
- Subjects
0301 basic medicine ,High-throughput screening ,lcsh:Medicine ,Amyloidogenic Proteins ,Protein aggregation ,Amyloid Neuropathies ,Protein Aggregation, Pathological ,Article ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,AA amyloidosis ,Drug Discovery ,Quantum Dots ,medicine ,Humans ,lcsh:Science ,Multidisciplinary ,biology ,Plant Extracts ,Rosmarinic acid ,lcsh:R ,Neurodegenerative Diseases ,medicine.disease ,Tropolone ,High-Throughput Screening Assays ,030104 developmental biology ,chemistry ,Biochemistry ,Chaperone (protein) ,Amyloid aggregation ,biology.protein ,lcsh:Q ,Protein folding ,030217 neurology & neurosurgery - Abstract
Protein aggregation is the principal component of numerous protein misfolding pathologies termed proteinopathies, such as Alzheimer’s disease, Parkinson’s disease, prion disease, and AA amyloidosis with unmet treatment needs. Protein aggregation inhibitors have great potential for the prevention and treatment of proteinopathies. Here we report the development of an automated real-time microliter-scale high throughput screening (MSHTS) system for amyloid aggregation inhibitors using quantum-dot nanoprobes. Screening 504 crude extracts and 134 low molecular weight aromatic compounds revealed the relationship of amyloid-β (Aβ) aggregation inhibitory activities of plant extracts using a plant-based classification. Within the eudicots, rosids, Geraniales and Myrtales showed higher activity. Screening low molecular weight aromatic compounds demonstrated that the structure of tropolone endows it with potential Aβ aggregation inhibitory activity. The activity of the most active tropolone derivative was higher than that of rosmarinic acid. MSHTS also identified three chaperone molecules as tau aggregation inhibitors. These results demonstrate that our automated MSHTS system is a novel and robust tool that can be adapted to a wide range of compounds and aggregation-prone polypeptides.
- Published
- 2019