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Quinoline-Malononitrile-Based Aggregation-Induced Emission Probe for Monoamine Oxidase Detection in Living Cells
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Document Title
Quinoline-Malononitrile-Based Aggregation-Induced Emission Probe for Monoamine Oxidase Detection in Living Cells
Author
Duangkamol C. Wangngae S. Wet-osot S. Khaikate O. Chansaenpak K. Lai R.-Y. Kamkaew A.
Affiliations
School of Chemistry Institute of Science Suranaree University of Technology Nakhon Ratchasima 30000 Thailand; Division of Basic and Medical Sciences Faculty of Allied Health Sciences Pathumthani University Pathum Thani 12000 Thailand; Medical Life Science Institute Department of Medical Sciences Ministry of Public Health Nonthaburi 11000 Thailand; National Nanotechnology Center National Science and Technology Development Agency Thailand Science Park Pathum Thani 12120 Thailand
Type
Article
Source Title
Molecules
ISSN
14203049
Year
2023
Volume
28
Issue
6
Open Access
All Open A+E70+E71:Y77
Publisher
MDPI
DOI
10.3390/molecules28062655
Abstract
A quinoline-malononitrile (QM)-based aggregation-induced emission probe was developed to detect MAOs in cells through an enzymatic reaction followed by ?-elimination. After being incubated at 37 ?C QM-NH2 responded to the MAO enzymes with great specificity and within just 5 min. This 5 min responsive mechanism was fast with the limit of detection (LOD) at 5.49 and 4.76 ?g mL?1 for MAO-A and MAO-B respectively. Moreover QM-NH2 displayed high enzyme specificity even in the presence of high concentrations of biological interferences such as oxidizing and reducing agents biothiols amino acids and glucose. Furthermore QM-NH2 demonstrated biocompatibility as the cells retained more than 70% viability when exposed to QM-NH2 at concentrations of up to 20 ?M. As a result QM-NH2 was used to detect MAO-A and MAO-B in SH-SY5Y and HepG2 cells respectively. After 1h incubation with QM-NH2 the cells exhibited enhanced fluorescence by about 20-fold. Moreover the signal from cells was reduced when MAO inhibitors were applied prior to incubating with QM-NH2. Therefore our research recommends using a QM probe as a generic method for producing recognition moieties for fluorogenic enzyme probes. ? 2023 by the authors.
Keyword
activity-based fluorescence probe | AIE | AIEgen | enzymatic detection | MAO
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Knowledge Taxonomy Level 3
License
CC BY
Rights
Authors
Publication Source
Scopus