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Świerczyńska M, Słowiński D, Michalski R, Romański J, Podsiadły R. A New and Fast-Response Fluorescent Probe for Monitoring Hypochlorous Acid Derived from Myeloperoxidase. Molecules 2023; 28:6055. [PMID: 37630307 PMCID: PMC10459737 DOI: 10.3390/molecules28166055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/08/2023] [Accepted: 08/11/2023] [Indexed: 08/27/2023] Open
Abstract
Hypochlorous acid (HOCl) has been implicated in numerous pathologies associated with an inflammatory component, but its selective and sensitive detection in biological settings remains a challenge. In this report, imaging of HOCl was realized with a thiomorpholine-based probe as derivative of nitrobenzothiadiazole (NBD-S-TM). The fluorescence is based on photoinduced electron transfer by using nitrobenzothiadiazole core as a donor and thiomorpholine substituent as an acceptor. NBD-S-TM showed high sensitivity and a fast response to HOCl k = (2.6 ± 0.2) × 107 M-1s-1 with a 1:1 stoichiometry. The detection limit for HOCl was determined to be 60 nM. Furthermore, the desirable features of NBD-S-TM for the detection of HOCl in aqueous solutions, such as its reliability at physiological pH, rapid fluorescence response, and biocompatibility, enabled its application in the detection of HOCl in myeloperoxidase enzymatic system. Moreover, NBD-S-TM exhibited excellent selectivity and sensitivity for HOCl over other biologically relevant species, such as hydrogen peroxide and peroxynitrite. The fluorescent S-oxidized product (NBD-S-TSO) is only formed in the presence of HOCl. Probing with NBD-S-TM may be helpful to further the development of high throughput screening assays to monitor the activity of myeloperoxidase.
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Affiliation(s)
- Małgorzata Świerczyńska
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland; (M.Ś.); (D.S.)
| | - Daniel Słowiński
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland; (M.Ś.); (D.S.)
| | - Radosław Michalski
- Institute of Applied Radiation Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland;
| | - Jarosław Romański
- Department of Organic and Applied Chemistry, Faculty of Chemistry, University of Lodz, Tamka 12, 91-403 Lodz, Poland;
| | - Radosław Podsiadły
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland; (M.Ś.); (D.S.)
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Mai LTP, Tran VD, Phuong HVM, Trang UTH, Thanh LT, Son NV, Cuong VD, Dung LP, Hanh NTM, Hai H, Oanh DTK, Thuy NT. Investigation of SARS-CoV-2 presence on environmental surfaces and waste in healthcare and non-healthcare facilities. ENVIRONMENTAL CHALLENGES (AMSTERDAM, NETHERLANDS) 2022; 7:100526. [PMID: 37519307 PMCID: PMC9026952 DOI: 10.1016/j.envc.2022.100526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/23/2022] [Accepted: 04/20/2022] [Indexed: 08/01/2023]
Abstract
Objective The objective of the paper is to investigate the presence of SARS-CoV-2 on inanimate surfaces in four healthcare facilities treating patients with COVID-19 and four quarantine regiments of provincial military commands. Methods From August to October 2020, a total of 468 one-off environmental samples consisting of inanimate surfaces, garbage, and wastewater were collected. The real-time RT-PCR assay targeting E and RdRp genes to detect SARS-CoV-2 and checklist and questionnaire of disinfection practices were employed. If detected by RT-PCR, then positive samples are subjected to cell culture to determine viability. Results The test results showed all samples (100%) to be negative with SARS-CoV-2 resulting in unperformed virus culture. As for recent disinfection practices, chlorine-based products dissolved at a concentration of 0.1% (1000 ppm) in the general context or 0.5% (5000 ppm) for blood and body fluid spills are routinely applied twice a day and at the discharge of patients or quarantined people. Conclusions The finding may illustrate the importance of disinfection practices in removing pathogens or significantly reducing SARS-CoV-2 contamination on environmental surfaces and waste.
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Affiliation(s)
- Le Thi Phuong Mai
- Department of Public Health, National Institute of Hygiene and Epidemiology, 1 Yersin St., Hai Ba Trung Dist, Hanoi, Vietnam
| | - Van Dinh Tran
- Department of Public Health, National Institute of Hygiene and Epidemiology, 1 Yersin St., Hai Ba Trung Dist, Hanoi, Vietnam
| | - Hoang Vu Mai Phuong
- Department of Public Health, National Institute of Hygiene and Epidemiology, 1 Yersin St., Hai Ba Trung Dist, Hanoi, Vietnam
| | - Ung Thi Hong Trang
- Department of Public Health, National Institute of Hygiene and Epidemiology, 1 Yersin St., Hai Ba Trung Dist, Hanoi, Vietnam
| | - Le Thi Thanh
- Department of Public Health, National Institute of Hygiene and Epidemiology, 1 Yersin St., Hai Ba Trung Dist, Hanoi, Vietnam
| | - Nguyen Vu Son
- Department of Public Health, National Institute of Hygiene and Epidemiology, 1 Yersin St., Hai Ba Trung Dist, Hanoi, Vietnam
| | - Vuong Duc Cuong
- Department of Public Health, National Institute of Hygiene and Epidemiology, 1 Yersin St., Hai Ba Trung Dist, Hanoi, Vietnam
| | - Luu Phuong Dung
- Department of Public Health, National Institute of Hygiene and Epidemiology, 1 Yersin St., Hai Ba Trung Dist, Hanoi, Vietnam
| | - Nguyen Thi My Hanh
- Department of Public Health, National Institute of Hygiene and Epidemiology, 1 Yersin St., Hai Ba Trung Dist, Hanoi, Vietnam
| | - Hoang Hai
- Department of Public Health, National Institute of Hygiene and Epidemiology, 1 Yersin St., Hai Ba Trung Dist, Hanoi, Vietnam
| | - Dang Thi Kieu Oanh
- Department of Public Health, National Institute of Hygiene and Epidemiology, 1 Yersin St., Hai Ba Trung Dist, Hanoi, Vietnam
| | - Nguyen Thanh Thuy
- Department of Public Health, National Institute of Hygiene and Epidemiology, 1 Yersin St., Hai Ba Trung Dist, Hanoi, Vietnam
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