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Ma J, Zhao M, Kong X, Li H, Xie H, Yang X, Zhang Z. Probing the toxic hypochlorous acid in natural waters and biosystem by a coumarin-based fluorescence probe. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 282:116836. [PMID: 39097417 DOI: 10.1016/j.ecoenv.2024.116836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 07/11/2024] [Accepted: 08/01/2024] [Indexed: 08/05/2024]
Abstract
Since the onset of the SARS-CoV-2 pandemic in early 2020, there has been a notable rise in sodium hypochlorite disinfectants. Sodium hypochlorite undergoes hydrolysis to generate hypochlorous acid for virus eradication. This chlorine-based disinfectant is widely utilized for public disinfection due to its effectiveness. Although sodium hypochlorite disinfection is convenient, its excessive and indiscriminate use can harm the water environment and pose a risk to human health. Hypochlorous acid, a reactive oxygen species, plays a crucial role in the troposphere, stratospheric chemistry, and oxidizing capacity. Additionally, hypochlorous acid is vital as a reactive oxygen species in biological systems, and its irregular metabolism and level is associated with several illnesses. Thus, it is crucial to identify hypochlorous acid to comprehend its environmental and biological functions precisely. Here, we constructed a new fluorescent probe, utilizing the twisted intramolecular charge transfer mechanism to quickly and accurately detect hypochlorous acid in environmental water and biosystems. The probe showed a notable increase in fluorescence when exposed to hypochlorous acid, demonstrating its excellent selectivity, fast response time (less than 10 seconds), a large Stokes shift (∼ 102 nm), and a low detection limit of 15.5 nM.
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Affiliation(s)
- Junyan Ma
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455000, China; Department of Chemistry, Clemson University, Clemson, SC 29634, United States.
| | - Mingtao Zhao
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455000, China
| | - Xiangtao Kong
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455000, China
| | - He Li
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455000, China
| | - Hua Xie
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xiaomei Yang
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455000, China
| | - Zhenxing Zhang
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455000, China; Department of Energy and Resource Engineering, College of Engineering, Peking University, Beijing 100871, China.
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2
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An K, Fan J, Lin B, Han Y. A lysosome-targeted fluorescent probe for fluorescence imaging of hypochlorous acid in living cells and in vivo. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 316:124316. [PMID: 38669982 DOI: 10.1016/j.saa.2024.124316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 04/15/2024] [Accepted: 04/18/2024] [Indexed: 04/28/2024]
Abstract
Lysosomes, as crucial acidic organelles in cells, play a significant role in cellular functions. The levels and distribution of hypochlorous acid (HOCl) within lysosomes can profoundly impact their biological functionality. Hence, real-time monitoring of the concentration of HOCl in lysosomes holds paramount importance for further understanding various physiological and pathological processes associated with lysosomes. In this study, we developed a bodipy-based fluorescent probe derived from pyridine and phenyl selenide for the specific detection of HOCl in aqueous solutions. Leveraging the probe's sensitive photoinduced electron transfer effect from phenyl selenide to the fluorophore, the probe exhibited satisfactory high sensitivity (with a limit of detection of 5.2 nM and a response time of 15 s) to hypochlorous acid. Further biological experiments confirmed that the introduction of the pyridine moiety enabled the probe molecule to selectively target lysosomes. Moreover, the probe successfully facilitated real-time monitoring of HOCl in cell models stimulated by N-acetylcysteine (NAC) and lipopolysaccharide (LPS), as well as in a normal zebrafish model. This provides a universal method for dynamically sensing HOCl in lysosomes.
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Affiliation(s)
- Ke An
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jiaxin Fan
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Bin Lin
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Yifeng Han
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China.
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3
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Murashevych B, Bilenkyi G, Girenko D, Bilenkyi E. N-Chlorotaurine Solutions as Agents for Infusion Detoxification Therapy: Preclinical Studies. Int J Mol Sci 2024; 25:8345. [PMID: 39125912 PMCID: PMC11313245 DOI: 10.3390/ijms25158345] [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: 06/16/2024] [Revised: 07/18/2024] [Accepted: 07/19/2024] [Indexed: 08/12/2024] Open
Abstract
N-chlorotaurine (NCT) is a broad-spectrum antimicrobial agent with outstanding tolerability, effective for topical and inhalation use. This paper presents the results of studies of single and repeated intravenous infusions of NCT to laboratory animals. The studies were conducted on female Wistar Han rats. The effect of NCT infusions on the general condition, behavioral reactions, main biochemical and hematological parameters, hemocoagulation system, cardiovascular system, and on the condition of the internal organs was studied. It was found that NCT infusions do not reveal deviations in the studied parameters that could indicate a toxic effect. The estimated LD50 is more than 80 mg/kg. In a subchronic experiment, a statistically significant decrease in cholesterol (by up to 11%), glucose (by up to 15%) and excess bases (up to four times) in the blood, and an increase in heart rate (by up to 31%) and frequency of defecations (by up to 35%), as well as pronounced antiplatelet effect, were found. In animals with simulated endotoxicosis, a decrease in the cytolysis and oxidative stress markers was observed. Such effects are caused by both chlorine-active compounds and taurine.The results obtained indicate broad prospects for the use of NCT solutions as an infusion detoxifying agent.
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Affiliation(s)
- Bohdan Murashevych
- Department of Biochemistry and Medical Chemistry, Dnipro State Medical University, 49044 Dnipro, Ukraine
| | - Gennadii Bilenkyi
- Clinical Hospital of Emergency Medical Care of the Dnipro City Council, 65 Volodymyra Antonovycha Str., 49000 Dnipro, Ukraine
| | - Dmitry Girenko
- Department of Physical Chemistry, Ukrainian State University of Chemical Technology, 8 Gagarina Ave., 49005 Dnipro, Ukraine;
| | - Emil Bilenkyi
- Department of Biochemistry and Medical Chemistry, Dnipro State Medical University, 49044 Dnipro, Ukraine
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4
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Yi G, Gao S, Armugam A, Riduan SN, Teong SP, Li X, Wang J, Chan SP, Lu H, Ying JY, Zhang Y. Self-Promoted Hydroxyl Radical Releasing Magnetic Zn@Fe Particles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2310856. [PMID: 38377308 DOI: 10.1002/smll.202310856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/29/2024] [Indexed: 02/22/2024]
Abstract
Semiconductor photocatalysts, such as TiO2 and ZnO, have garnered significant attention for their ability to generate hydroxyl radicals, offering various practical applications. However, the reliance on UV light to facilitate electron-hole separation for hydroxyl radical production poses limitations. In this study, a novel approach is presented utilizing Zn@Fe core/shell particles capable of generating hydroxyl radicals without external energy input. The generation process involves electron donation from Zn to O2, resulting in the formation of radical species .O2 -/H2O2, followed by Fe-catalyzed conversion of H2O2 into hydroxyl radicals through the Fenton reaction. The release of .OH imparts good antimicrobial and antiviral properties to the Zn@Fe particles. Furthermore, the inclusion of Fe confers magnetic properties to the material. This dual functionality holds promise for diverse potential applications for the Zn@Fe particles.
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Affiliation(s)
- Guangshun Yi
- Institute of Bioengineering and Bioimaging (IBB), 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), 1 Pesek Road Jurong Island, Singapore, 627833, Singapore
| | - Shujun Gao
- NanoBio Lab, Institute of Materials Research and Engineering (IMRE), 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
| | - Arunmozhiarasi Armugam
- Institute of Bioengineering and Bioimaging (IBB), 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
| | - Siti Nurhanna Riduan
- Institute of Bioengineering and Bioimaging (IBB), 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
| | - Siew Ping Teong
- Institute of Bioengineering and Bioimaging (IBB), 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), 1 Pesek Road Jurong Island, Singapore, 627833, Singapore
| | - Xiukai Li
- Institute of Bioengineering and Bioimaging (IBB), 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), 1 Pesek Road Jurong Island, Singapore, 627833, Singapore
| | - Jinquan Wang
- Institute of Bioengineering and Bioimaging (IBB), 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), 1 Pesek Road Jurong Island, Singapore, 627833, Singapore
| | - Shook Pui Chan
- Institute of Bioengineering and Bioimaging (IBB), 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), 1 Pesek Road Jurong Island, Singapore, 627833, Singapore
| | - Hongfang Lu
- NanoBio Lab, Institute of Materials Research and Engineering (IMRE), 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
- Institute of Molecular and Cell Biology, 61 Biopolis Drive, Proteos, Singapore, 138673, Singapore
| | - Jackie Y Ying
- NanoBio Lab, Institute of Materials Research and Engineering (IMRE), 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
- Department of Bioengineering, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
| | - Yugen Zhang
- Institute of Bioengineering and Bioimaging (IBB), 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), 1 Pesek Road Jurong Island, Singapore, 627833, Singapore
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Lewandowski RB, Stępińska M, Osuchowski Ł, Kasprzycka W, Dobrzyńska M, Mierczyk Z, Trafny EA. The HOCl dry fog-is it safe for human cells? PLoS One 2024; 19:e0304602. [PMID: 38809935 PMCID: PMC11135740 DOI: 10.1371/journal.pone.0304602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 05/14/2024] [Indexed: 05/31/2024] Open
Abstract
This study aims to investigate if high-concentration HOCl fogging disinfection causes cytotoxicity and genotoxicity to cultured primary human skin fibroblasts. The cells were exposed to a dry fog of HOCl produced from solutions with a concentration of 300 ppm (5.72 mM) or 500 ppm (9.53 mM). After four times when fibroblasts were exposed to aerosolized HOCl at a concentration of 500 ppm for 9 minutes, significant cytotoxicity and genotoxicity effects were observed. Significant changes in the morphology of fibroblasts and cell death due to membrane disruption were observed, independent of the number of exposures. Flow cytometry analyses performed under these experimental conditions indicated a decrease in the number of cells with an intact cell membrane in the exposed samples compared to the sham samples, dropping to 49.1% of the total cells. Additionally, under the same conditions, the neutral comet assay results demonstrated significant DNA damage in the exposed cells. However, no analogous damages were found when the cells were exposed to aerosolized HOCl generated from a 300-ppm solution for 3 minutes, whether once or four times. Therefore, we have concluded that aerosolized HOCl in dry fog, with a concentration exceeding 300 ppm, can cause cytotoxic and genotoxic effects on human skin fibroblasts.
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Affiliation(s)
- Rafał Bogdan Lewandowski
- Institute of Optoelectronics, Biomedical Engineering Centre, Military University of Technology, Warsaw, Poland
| | - Małgorzata Stępińska
- Institute of Optoelectronics, Biomedical Engineering Centre, Military University of Technology, Warsaw, Poland
| | - Łukasz Osuchowski
- Institute of Optoelectronics, Biomedical Engineering Centre, Military University of Technology, Warsaw, Poland
| | - Wiktoria Kasprzycka
- Institute of Optoelectronics, Biomedical Engineering Centre, Military University of Technology, Warsaw, Poland
| | - Monika Dobrzyńska
- Institute of Optoelectronics, Biomedical Engineering Centre, Military University of Technology, Warsaw, Poland
| | - Zygmunt Mierczyk
- Institute of Optoelectronics, Biomedical Engineering Centre, Military University of Technology, Warsaw, Poland
| | - Elżbieta Anna Trafny
- Institute of Optoelectronics, Biomedical Engineering Centre, Military University of Technology, Warsaw, Poland
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6
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Kubo M, Eda R, Maehana S, Fuketa H, Shinkai N, Kawamura N, Kitasato H, Hanaki H. Virucidal efficacy of hypochlorous acid water for aqueous phase and atomization against SARS-CoV-2. JOURNAL OF WATER AND HEALTH 2024; 22:601-611. [PMID: 38557574 DOI: 10.2166/wh.2024.348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 01/29/2024] [Indexed: 04/04/2024]
Abstract
Coronavirus disease 2019 (COVID-19) is an infectious viral disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that emerged at the end of 2019. SARS-CoV-2 can be transmitted through droplets, aerosols, and fomites. Disinfectants such as alcohol, quaternary ammonium salts, and chlorine-releasing agents, including hypochlorous acid, are used to prevent the spread of SARS-CoV-2 infection. In the present study, we investigated the efficacy of ionless hypochlorous acid water (HOCl) in suspension and by spraying to inactivate SARS-CoV-2. The virucidal efficacy of HOCl solution in tests against SARS-CoV-2 was evaluated as 50% tissue culture infectious dose. Although the presence of organic compounds influenced the virucidal efficacy, HOCl treatment for 20 s was significantly effective to inactivate Wuhan and Delta strains in the suspension test. HOCl atomization for several hours significantly reduced the SARS-CoV-2 attached to plastic plates. These results indicate that HOCl solution with elimination containing NaCl and other ions may have high virucidal efficacy against SARS-CoV-2. This study provides important information about the virucidal efficacy and use of HOCl solution.
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Affiliation(s)
- Makoto Kubo
- Department of Microbiology, Kitasato University School of Allied Health Sciences, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan; Department of Environmental Microbiology, Kitasato University Graduate School of Medical Sciences, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan; Research Facility of Regenerative Medicine and Cell Design, Kitasato University School of Allied Health Sciences, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan E-mail:
| | - Ryotaro Eda
- Department of Microbiology, Kitasato University School of Allied Health Sciences, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan; Department of Environmental Microbiology, Kitasato University Graduate School of Medical Sciences, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan; Research Facility of Regenerative Medicine and Cell Design, Kitasato University School of Allied Health Sciences, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Shotaro Maehana
- Department of Microbiology, Kitasato University School of Allied Health Sciences, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan; Department of Environmental Microbiology, Kitasato University Graduate School of Medical Sciences, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan; Research Facility of Regenerative Medicine and Cell Design, Kitasato University School of Allied Health Sciences, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Hiroshi Fuketa
- NIPRO Corporation, Pharmaceutical Research Laboratories, 7-2 Minamisakae-cho Kasukabe, Saitama 344-0057, Japan
| | - Norihiro Shinkai
- NIPRO Corporation, Pharmaceutical Research Laboratories, 7-2 Minamisakae-cho Kasukabe, Saitama 344-0057, Japan
| | - Naohisa Kawamura
- NIPRO Corporation, Pharmaceutical Research Laboratories, 7-2 Minamisakae-cho Kasukabe, Saitama 344-0057, Japan
| | - Hidero Kitasato
- Department of Microbiology, Kitasato University School of Allied Health Sciences, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Hideaki Hanaki
- Infection Control Research Center, The Omura Satoshi Memorial Institution, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
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7
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Boone SA, Ijaz MK, Bright KR, Silva-Beltran NP, Nims RW, McKinney J, Gerba CP. Antiviral Natural Products, Their Mechanisms of Action and Potential Applications as Sanitizers and Disinfectants. FOOD AND ENVIRONMENTAL VIROLOGY 2023; 15:265-280. [PMID: 37906416 DOI: 10.1007/s12560-023-09568-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 09/29/2023] [Indexed: 11/02/2023]
Abstract
Plant extracts, natural products and plant oils contain natural virucidal actives that can be used to replace active ingredients in commercial sanitizers and disinfectants. This review focuses on the virucidal mechanisms of natural substances that may exhibit potential for indoor air and fomite disinfection. Review of scientific studies indicates: (1) most natural product studies use crude extracts and do not isolate or identify exact active antiviral substances; (2) many natural product studies contain unclear explanations of virucidal mechanisms of action; (3) natural product evaluations of virucidal activity should include methods that validate efficacy under standardized disinfectant testing procedures (e.g., carrier tests on applicable surfaces or activity against aerosolized viruses, etc.). The development of natural product disinfectants requires a better understanding of the mechanisms of action (MOA), chemical profiles, compound specificities, activity spectra, and the chemical formulations required for maximum activity. Combinations of natural antiviral substances and possibly the addition of synthetic compounds might be needed to increase inactivation of a broader spectrum of viruses, thereby providing the required efficacy for surface and air disinfection.
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Affiliation(s)
- Stephanie A Boone
- Department of Environmental Science, University of Arizona, Tucson, AZ, USA.
| | - M Khalid Ijaz
- Global Research & Development for Lysol and Dettol, Reckitt Benckiser LLC, Montvale, NJ, USA
| | - Kelly R Bright
- Department of Environmental Science, University of Arizona, Tucson, AZ, USA
| | | | | | - Julie McKinney
- Global Research & Development for Lysol and Dettol, Reckitt Benckiser LLC, Montvale, NJ, USA
| | - Charles P Gerba
- Department of Environmental Science, University of Arizona, Tucson, AZ, USA
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Grecu M, Henea ME, Rîmbu CM, Simion C, Şindilar EV, Solcan G. The Bacteriophages Therapy of Interdigital Pyoderma Complicated by Cellulitis with Antibiotic-Resistant Pseudomonas aeruginosa in a Dog-Case Report. Vet Sci 2023; 10:642. [PMID: 37999465 PMCID: PMC10675310 DOI: 10.3390/vetsci10110642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/01/2023] [Accepted: 11/03/2023] [Indexed: 11/25/2023] Open
Abstract
Pseudomonas aeruginosa is a highly pathogenic bacterium with high pathogenicity, that can cause serious infections in all species and especially in dogs. Treatment of the infection induced by this bacterium can be a challenge considering that some strains have developed resistance to most classes of antimicrobials. The use of bacteriophages to alleviate infections caused by Pseudomonas aeruginosa has demonstrated their potential for both internal and external applications. This study aimed to illustrate the treatment with bacteriophages in bacterially complicated skin lesions that do not respond to antimicrobial therapy.
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Affiliation(s)
- Mariana Grecu
- Department of Pharmacy, Faculty of Veterinary Medicine, Iași University of Life Sciences “Ion Ionescu de la Brad”, 8 Mihail Sadoveanu Alley, 700489 Iasi, Romania; (M.G.); (M.-E.H.)
| | - Mădălina-Elena Henea
- Department of Pharmacy, Faculty of Veterinary Medicine, Iași University of Life Sciences “Ion Ionescu de la Brad”, 8 Mihail Sadoveanu Alley, 700489 Iasi, Romania; (M.G.); (M.-E.H.)
| | - Cristina Mihaela Rîmbu
- Department of Microbiology, Faculty of Veterinary Medicine, Iași University of Life Sciences “Ion Ionescu de la Brad”, 8 Mihail Sadoveanu Alley, 700489 Iasi, Romania;
| | - Cătălina Simion
- Department of Surgery, Faculty of Veterinary Medicine, Iași University of Life Sciences “Ion Ionescu de la Brad”, 8 Mihail Sadoveanu Alley, 700489 Iasi, Romania;
| | - Eusebiu-Viorel Şindilar
- Department of Surgery, Faculty of Veterinary Medicine, Iași University of Life Sciences “Ion Ionescu de la Brad”, 8 Mihail Sadoveanu Alley, 700489 Iasi, Romania;
| | - Gheorghe Solcan
- Department of Internal Medicine, Faculty of Veterinary Medicine, Iași University of Life Sciences “Ion Ionescu de la Brad”, 8 Mihail Sadoveanu Alley, 700489 Iasi, Romania
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Plata JC, Díaz-Báez D, Delgadillo NA, Castillo DM, Castillo Y, Hurtado CP, Neuta Y, Calderón JL, Lafaurie GI. Hypochlorous Acid as a Potential Postsurgical Antimicrobial Agent in Periodontitis: A Randomized, Controlled, Non-Inferiority Trial. Antibiotics (Basel) 2023; 12:1311. [PMID: 37627732 PMCID: PMC10451621 DOI: 10.3390/antibiotics12081311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/09/2023] [Accepted: 08/10/2023] [Indexed: 08/27/2023] Open
Abstract
BACKGROUND Hypochlorous acid (HOCl) is an antimicrobial agent with high affinity to Gram-negative bacteria of the subgingival biofilm. It could have an equivalent or no inferiority effect to chlorhexidine (CHX) to avoid recolonization of these microorganisms after the post-surgical period. OBJECTIVE The objective is to compare the reduction of plaque index (PI), gingival index (GI), pocket depth (PD), gain of clinical attachment level (CAL), and bacterial recolonization of periodontopathic microorganisms in subgingival biofilm at 7, 21, and 90 days after Open Flap Debridement (OFD) under two antimicrobial protocols: (A) HOCl 0.05% followed by HOCl 0.025% and (B) CHX 0.2%/CHX 0.12% used per 21 days without regular oral hygiene during the post-surgical period. MATERIAL AND METHODS A no-inferiority randomized controlled trial was carried out. Thirty-two patients were randomly divided to receive each antiplaque protocol after OFD in patients with periodontitis. Clinical indexes and bacterial recolonization were assessed using qPCR for up to 90 days. Data were analyzed using repeated measures ANOVA, mixed effects models adjusted for treatment, time, and the Chi-squared/Fisher test. A no-inferiority analysis was also performed using the Hodges-Lehmann hypothesis test for non-inferiority. RESULTS HOCl was not inferior to CHX in reducing PI. Both groups showed a comparable reduction of recolonization for Porphyromonas gingivalis, Tannerella forsythia, and Eubacterium nodatum. However, the HOCl protocol was non-inferior to the CHX protocol for Treponema denticola and Aggregatibacter actinomicetemcomitans. CONCLUSIONS HOCl improved periodontal healing. HOCl showed an impact in reducing the recolonization of periodontopathic bacteria in the postoperative period.
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Affiliation(s)
- Julio Cesar Plata
- Master’s Program in Dental Sciences, School of Dentistry, Universidad El Bosque, Bogotá P.O. Box 110121, Colombia;
- School of Dentistry, Universidad Cooperativa de Colombia, Bucaramanga P.O. Box 680001, Colombia;
| | - David Díaz-Báez
- Unit of Oral Basic Investigation-UIBO, School of Dentistry, Universidad El Bosque, Bogotá P.O. Box 110121, Colombia; (D.D.-B.); (N.A.D.); (D.M.C.); (Y.C.); (Y.N.); (J.L.C.)
| | - Nathaly Andrea Delgadillo
- Unit of Oral Basic Investigation-UIBO, School of Dentistry, Universidad El Bosque, Bogotá P.O. Box 110121, Colombia; (D.D.-B.); (N.A.D.); (D.M.C.); (Y.C.); (Y.N.); (J.L.C.)
| | - Diana Marcela Castillo
- Unit of Oral Basic Investigation-UIBO, School of Dentistry, Universidad El Bosque, Bogotá P.O. Box 110121, Colombia; (D.D.-B.); (N.A.D.); (D.M.C.); (Y.C.); (Y.N.); (J.L.C.)
| | - Yormaris Castillo
- Unit of Oral Basic Investigation-UIBO, School of Dentistry, Universidad El Bosque, Bogotá P.O. Box 110121, Colombia; (D.D.-B.); (N.A.D.); (D.M.C.); (Y.C.); (Y.N.); (J.L.C.)
| | - Claudia Patricia Hurtado
- School of Dentistry, Universidad Cooperativa de Colombia, Bucaramanga P.O. Box 680001, Colombia;
| | - Yineth Neuta
- Unit of Oral Basic Investigation-UIBO, School of Dentistry, Universidad El Bosque, Bogotá P.O. Box 110121, Colombia; (D.D.-B.); (N.A.D.); (D.M.C.); (Y.C.); (Y.N.); (J.L.C.)
| | - Justo Leonardo Calderón
- Unit of Oral Basic Investigation-UIBO, School of Dentistry, Universidad El Bosque, Bogotá P.O. Box 110121, Colombia; (D.D.-B.); (N.A.D.); (D.M.C.); (Y.C.); (Y.N.); (J.L.C.)
| | - Gloria Inés Lafaurie
- Unit of Oral Basic Investigation-UIBO, School of Dentistry, Universidad El Bosque, Bogotá P.O. Box 110121, Colombia; (D.D.-B.); (N.A.D.); (D.M.C.); (Y.C.); (Y.N.); (J.L.C.)
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Zhao K, Hu F, Zhang Z, Yin X, Wang H, Li M. 0.01% Hypochlorous Acid Treats Aspergillus fumigatus Keratitis in Rats by Reducing Fungal Load and Inhibiting the Inflammatory Response. Transl Vis Sci Technol 2023; 12:3. [PMID: 37531113 PMCID: PMC10405862 DOI: 10.1167/tvst.12.8.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 05/26/2023] [Indexed: 08/03/2023] Open
Abstract
Purpose To investigate the antifungal and anti-inflammatory effects of 0.01% hypochlorous acid (HCLO) on rats with Aspergillus fumigatus keratitis. Methods The time-kill assay and broth microdilution procedures were used in vitro to demonstrate that 0.01% HCLO was fungicidal and fungistatic. The severity of the disease was evaluated in vivo using a clinical score and slit-lamp photographs. Fungal load, polymorphonuclear neutrophil infiltration, and the production of related proteins were determined using colony plate counting, in vivo confocal microscopy, periodic acid-Schiff staining, fungal fluorescence staining, immunofluorescence staining, myeloperoxidase assay, and Western blotting. Result In vitro, 0.01% HCLO can destroy A. fumigatus spores in 1 minute. The optical density of the 0.01% HCLO group was significantly lower than that of the phosphate-buffered saline control group (P < 0.01), and no visible mycelium was observed using a fluorescence microscope. 0.01% HCLO reduced the severity of A. fumigatus keratitis in rats by decreasing the clinical score, fungal loading (periodic acid-Schiff, plate count, and fungal fluorescence staining), and inhibiting neutrophil infiltration and activity (immunofluorescence staining and myeloperoxidase). Furthermore, the Western blot analysis revealed that 0.01% HCO decreased protein expression levels of tumor necrosis factor-α and IL-1β. Conclusions According to our findings, 0.01% HCLO can kill A. fumigatus spores in vitro. It has antifungal and anti-inflammatory effects on A. fumigatus keratitis in rats. It also inhibited A. fumigatus growth; decreased neutrophil infiltration, tumor necrosis factor-α, and IL-1β expression; and provided a potential treatment for fungal keratitis. Translational Relevance This study provides a potential treatment for fungal keratitis in the clinic.
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Affiliation(s)
- Kai Zhao
- Department of Ophthalmology, Xuzhou Medical University, Xuzhou, China
| | - Fen Hu
- Department of Ophthalmology, Xuzhou Medical University, Xuzhou, China
| | - Zhaowei Zhang
- Department of Ophthalmology, Xuzhou Medical University, Xuzhou, China
| | - Xiaoyue Yin
- Department of Ophthalmology, Xuzhou Medical University, Xuzhou, China
| | - He Wang
- Department of Ophthalmology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Mingxin Li
- Department of Ophthalmology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
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11
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Lawal-Ayinde BM, Morita T, Oda K, Nazmul T, Kurose M, Nomura T, Yamamoto A, Higashiura A, Akita T, Tanaka J, Horiuchi I, Goda H, Sakaguchi T. Virus purification highlights the high susceptibility of SARS-CoV-2 to a chlorine-based disinfectant, chlorous acid. PLoS One 2023; 18:e0288634. [PMID: 37450488 PMCID: PMC10348549 DOI: 10.1371/journal.pone.0288634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Accepted: 07/01/2023] [Indexed: 07/18/2023] Open
Abstract
Chlorous acid water (HClO2) is known for its antimicrobial activity. In this study, we attempted to accurately assess the ability of chlorous acid water to inactivate SARS-CoV-2. When using cell culture supernatants of infected cells as the test virus, the 99% inactivation concentration (IC99) for the SARS-CoV-2 D614G variant, as well as the Delta and Omicron variants, was approximately 10ppm of free chlorine concentration with a reaction time of 10 minutes. On the other hand, in experiments using a more purified virus, the IC99 of chlorous acid water was 0.41-0.74ppm with a reaction time of 1 minute, showing a strong inactivation capacity over 200 times. With sodium hypochlorite water, the IC99 was 0.54ppm, confirming that these chlorine compounds have a potent inactivation effect against SARS-CoV-2. However, it became clear that when using cell culture supernatants of infected cells as the test virus, the effect is masked by impurities such as amino acids contained therein. Also, when proteins (0.5% polypeptone, or 0.3% BSA + 0.3% sheep red blood cells, or 5% FBS) were added to the purified virus, the IC99 values became high, ranging from 5.3 to 76ppm with a reaction time of 10 minutes, significantly reducing the effect. However, considering that the usual usage concentration is 200ppm, it was shown that chlorous acid water can still exert sufficient disinfection effects even in the presence of proteins. Further research is needed to confirm the practical applications and effects of chlorous acid water, but it has the potential to be an important tool for preventing the spread of SARS-CoV-2.
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Affiliation(s)
| | - Tomoko Morita
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kosuke Oda
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Tanuza Nazmul
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Miuko Kurose
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Toshihito Nomura
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
- Department of Infectious Diseases, Hiroshima University Hospital, Hiroshima, Japan
| | - Akima Yamamoto
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Akifumi Higashiura
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Tomoyuki Akita
- Department of Epidemiology, Infectious Disease Control, and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Junko Tanaka
- Department of Epidemiology, Infectious Disease Control, and Prevention, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | | | | | - Takemasa Sakaguchi
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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12
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Hamilton AN, Chandran S, Baker CA, Gibson KE. Surface Inactivation of a SARS-CoV-2 Surrogate with Hypochlorous Acid is Impacted by Surface Type, Contact Time, Inoculum Matrix, and Concentration. FOOD AND ENVIRONMENTAL VIROLOGY 2023; 15:116-122. [PMID: 36680664 PMCID: PMC9862229 DOI: 10.1007/s12560-023-09549-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 01/13/2023] [Indexed: 06/13/2023]
Abstract
Indirect contact with contaminated surfaces is a potential transmission route for COVID-19. Therefore, it is necessary to investigate convenient and inexpensive surface sanitization methods, such as HOCl, against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The SARS-CoV-2 surrogate, Phi6 (~ 7 log PFU/mL), was prepared in artificial saliva and tripartite matrices, spot inoculated on coupons of either stainless steel or vinyl, and allowed to dry. The coupons were sprayed with either 500 ppm or 1000 ppm HOCl, and remained on the surface for 0 s (control), 5 s, 30 s, or 60 s. Samples were enumerated via the double agar overlay assay. Statistical analysis was completed in R using a generalized linear model with Quasipoisson error approximations. Time, concentration, surface type, and inoculum matrix were all significant contributors to log reduction at P = 0.05. Significant three-way interactions were observed for 1000 ppm, vinyl, and 60 s (P = 0.03) and 1000 ppm, tripartite, and 60 s (P = 0.0121). A significant two-way interaction between vinyl and 60 s was also observed (P = 0.0168). Overall, increased HOCl concentration and exposure time led to increased Phi6 reduction. Notably, the highest estimated mean log reduction was 3.31 (95% CI 3.14, 3.49) for stainless steel at 60 s and 1000 ppm HOCl in artificial saliva, indicating that this method of sanitization may not adequately reduce enveloped viruses to below infective thresholds.
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Affiliation(s)
- Allyson N Hamilton
- Department of Food Science, Center for Food Safety, University of Arkansas System Division of Agriculture, 1371 West Altheimer Dr., Fayetteville, AR, 72704, USA
| | - Sahaana Chandran
- Department of Food Science, Center for Food Safety, University of Arkansas System Division of Agriculture, 1371 West Altheimer Dr., Fayetteville, AR, 72704, USA
| | - Christopher A Baker
- Department of Food Science, Center for Food Safety, University of Arkansas System Division of Agriculture, 1371 West Altheimer Dr., Fayetteville, AR, 72704, USA
- U.S. Food and Drug Administration, Center for Food Safety and Applied Nutrition, 5001 Campus Drive, College Park, MD, 20740, USA
| | - Kristen E Gibson
- Department of Food Science, Center for Food Safety, University of Arkansas System Division of Agriculture, 1371 West Altheimer Dr., Fayetteville, AR, 72704, USA.
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13
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Gu X, Cao T, Mou J, Liu J. Water bath is more efficient than hot air oven at thermal inactivation of coronavirus. Virol J 2023; 20:84. [PMID: 37131169 PMCID: PMC10153051 DOI: 10.1186/s12985-023-02038-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 04/11/2023] [Indexed: 05/04/2023] Open
Abstract
BACKGROUND Thermal inactivation is a conventional and effective method of eliminating the infectivity of pathogens from specimens in clinical and biological laboratories, and reducing the risk of occupational exposure and environmental contamination. During the COVID-19 pandemic, specimens from patients and potentially infected individuals were heat treated and processed under BSL-2 conditions in a safe, cost-effective, and timely manner. The temperature and duration of heat treatment are optimized and standardized in the protocol according to the susceptibility of the pathogen and the impact on the integrity of the specimens, but the heating device is often undefined. Devices and medium transferring the thermal energy vary in heating rate, specific heat capacity, and conductivity, resulting in variations in efficiency and inactivation outcome that may compromise biosafety and downstream biological assays. METHODS We evaluated the water bath and hot air oven in terms of pathogen inactivation efficiency, which are the most commonly used inactivation devices in hospitals and biological laboratories. By evaluating the temperature equilibrium and viral titer elimination under various conditions, we studied the devices and their inactivation outcomes under identical treatment protocol, and to analyzed the factors, such as energy conductivity, specific heat capacity, and heating rate, underlying the inactivation efficiencies. RESULTS We compared thermal inactivation of coronavirus using different devices, and have found that the water bath was more efficient at reducing infectivity, with higher heat transfer and thermal equilibration than a forced hot air oven. In addition to the efficiency, the water bath showed relative consistency in temperature equilibration of samples of different volumes, reduced the need for prolonged heating, and eliminated the risk of pathogen spread by forced airflow. CONCLUSIONS Our data support the proposal to define the heating device in the thermal inactivation protocol and in the specimen management policy.
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Affiliation(s)
- Xinxia Gu
- Laboratory of Infectious Diseases and Vaccine, West China School of Medicine, West China Hospital, Sichuan University, 88 Keyuan S. Rd, Chengdu, 610041, China
| | - Ting Cao
- Laboratory of Infectious Diseases and Vaccine, West China School of Medicine, West China Hospital, Sichuan University, 88 Keyuan S. Rd, Chengdu, 610041, China
| | - Jun Mou
- Laboratory of Infectious Diseases and Vaccine, West China School of Medicine, West China Hospital, Sichuan University, 88 Keyuan S. Rd, Chengdu, 610041, China
| | - Jie Liu
- Laboratory of Infectious Diseases and Vaccine, West China School of Medicine, West China Hospital, Sichuan University, 88 Keyuan S. Rd, Chengdu, 610041, China.
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14
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Miyaoka Y, Kadota C, Kabir MH, Hakim H, Yamaguchi M, Hasan MA, Shoham D, Murakami H, Kobayashi S, Takehara K. Isolation, molecular characterization, and disinfectants susceptibility of swine-carried mammalian orthoreoviruses in Japan in 2020-2022. J Vet Med Sci 2023; 85:185-193. [PMID: 36574999 PMCID: PMC10017281 DOI: 10.1292/jvms.22-0476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Biosecurity enhancement contributes to the reduction of various microbial pathogens. Mammalian orthoreoviruses (MRVs) which are increasingly recognized as potentially serious problems on swine industry were used as indicators of biosecurity enhancement on two pig farms. Twelve MRVs were detected and isolated from fecal specimens of healthy pigs collected from one of the two farms in Japan. By sequencing based on the partial S1 gene, MRV isolates were classified as MRV1 and MRV2. Additionally, the virucidal activities of disinfectants toward the isolated MRV1 were evaluated using quaternary ammonium compound (QAC) diluted 500 times with water (QAC-500), 0.17% food additive glade calcium hydroxide (FdCa(OH)2) solution, QAC diluted with 0.17% FdCa(OH)2 solution (Mix-500), sodium hypochlorite at 100 or 1,000 parts per million (ppm) of total chlorine (NaClO-100 or NaClO-1000, respectively). To efficiently inactivate MRV1 (≥3 log10 reductions), 0.17% FdCa(OH)2, Mix-500 and NaClO-1000 required 5 min, whereas it took 30 min for QAC-500. The number of MRV detections has decreased over time, after using Mix-500 for disinfection on the positive farm. These results suggest that different serotypes of MRVs are circulating among pigs, and that the occurrence of MRVs in the farms decreased consequent to more effective disinfection.
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Affiliation(s)
- Yu Miyaoka
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Chisaki Kadota
- Laboratory of Animal Health, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Md Humayun Kabir
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Hakimullah Hakim
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Makiko Yamaguchi
- Laboratory of Animal Health, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Md Amirul Hasan
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Dany Shoham
- Bar-Ilan University, Begin-Sadat Center for Strategic Studies, Ramat Gan, Israel
| | - Harumi Murakami
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan.,Laboratory of Animal Health, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Sota Kobayashi
- Division of Zoonosis Research, National Institute of Animal Health, National Agriculture and Food Research Organization, Ibaraki, Japan
| | - Kazuaki Takehara
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan.,Laboratory of Animal Health, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
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15
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Alpan AL, Cin GT. Comparison of hyaluronic acid, hypochlorous acid, and flurbiprofen on postoperative morbidity in palatal donor area: a randomized controlled clinical trial. Clin Oral Investig 2023:10.1007/s00784-022-04848-5. [PMID: 36595064 PMCID: PMC9808727 DOI: 10.1007/s00784-022-04848-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 12/26/2022] [Indexed: 01/04/2023]
Abstract
OBJECTIVE This study aims to evaluate the effects of topical hyaluronic acid (HA), hypochlorous acid (HOCl), and flurbiprofen on postoperative morbidity of palatal donor sites after free gingival graft (FGG) surgery. MATERIALS AND METHODS Sixty patients requiring FGG were randomly assigned into four groups: control, HA gel (600 mg/100 g high molecular weight hyaluronic acid), HOCl spray (170-200 ppm, ph7.1), flurbiprofen spray (0.075gr flurbiprofen). Topical agents were applied for 14 days, according to groups. Patients were followed for 28 days. Palatal healing was assessed with the Laundry wound healing index (WHI). Complete epithelization (CE) was evaluated with photographs and H2O2 bubbling. Pain, burning sensation, chewing efficacy, and tissue color match (CM) were evaluated using a visual analog scale (VAS). Postoperative analgesic consumption and delayed bleeding (DB) were also recorded. RESULTS HA provided better WHI values on the 7th, 14th, and 21st days compared to the other groups, respectively (p < 0.05). CE was formed on the 21st day in the HA group but on the 28th day in the other groups. HOCl and flurbiprofen groups were not different from the control group or each other in terms of WHI. HOCl had the lowest VAS scores of all time periods. DB was not observed in any group. Significantly fewer analgesics were taken in the topical agent-applied groups compared to the control group. CONCLUSIONS HA exhibits a positive impact on the epithelization of palatal wound healing and color matching. HOCl and flurbiprofen provided less pain; however, they might have negative effects on palatal wound healing. CLINICAL RELEVANCE As a result of obtaining free gingival grafts from palatal tissue for mucogingival surgical procedures, secondary wound healing of the donor area occurs. This wound in the palatal region can cause discomfort and pain every time patients use their mouths. The use of HA can reduce postoperative complications by accelerating wound healing and reducing pain. The topical use of flurbiprofen and HOCl can reduce patients' pain.
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Affiliation(s)
- Aysan Lektemur Alpan
- Department of Periodontology, Faculty of Dentistry, Pamukkale University, Kınıklı Campus, 20160 Denizli, Turkey
| | - Gizem Torumtay Cin
- Department of Periodontology, Faculty of Dentistry, Pamukkale University, Kınıklı Campus, 20160 Denizli, Turkey
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16
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Boecker D, Zhang Z, Breves R, Herth F, Kramer A, Bulitta C. Antimicrobial efficacy, mode of action and in vivo use of hypochlorous acid (HOCl) for prevention or therapeutic support of infections. GMS HYGIENE AND INFECTION CONTROL 2023; 18:Doc07. [PMID: 37034111 PMCID: PMC10073986 DOI: 10.3205/dgkh000433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
Abstract
The objective is to provide a comprehensive overview of the rapidly developing field of the current state of research on in vivo use of hypochlorous acid (HOCl) to aid infection prevention and control, including naso-pharyngeal, alveolar, topical, and systemic HOCl applications. Also, examples are provided of dedicated applications in COVID-19. A brief background of HOCl's biological and chemical specifics and its physiological role in the innate immune system is provided to understand the effect of in vivo applications in the context of the body's own physiological defense mechanisms.
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Affiliation(s)
- Dirk Boecker
- TOTO Consulting LLC, San Jose CA, USA
- *To whom correspondence should be addressed: Dirk Boecker, TOTO Consulting LLC, San Jose CA, USA, E-mail:
| | - Zhentian Zhang
- Institute for Medical Statistics, University Medical Center Göttingen, Göttingen, Germany
| | | | - Felix Herth
- Thoraxklinik, University of Heidelberg, Heidelberg, Germany
| | - Axel Kramer
- Institut of Hygiene and Environmental Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Clemens Bulitta
- Institut für Medizintechnik, Ostbayerische Technische Hochschule (OTH) Amberg-Weiden, Amberg-Weiden, Germany
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17
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Monitoring SARS-CoV-2 Surrogate TGEV Individual Virions Structure Survival under Harsh Physicochemical Environments. Cells 2022; 11:cells11111759. [PMID: 35681454 PMCID: PMC9179875 DOI: 10.3390/cells11111759] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/17/2022] [Accepted: 05/18/2022] [Indexed: 11/16/2022] Open
Abstract
Effective airborne transmission of coronaviruses via liquid microdroplets requires a virion structure that must withstand harsh environmental conditions. Due to the demanding biosafety requirements for the study of human respiratory viruses, it is important to develop surrogate models to facilitate their investigation. Here we explore the mechanical properties and nanostructure of transmissible gastroenteritis virus (TGEV) virions in liquid milieu and their response to different chemical agents commonly used as biocides. Our data provide two-fold results on virus stability: First, while particles with larger size and lower packing fraction kept their morphology intact after successive mechanical aggressions, smaller viruses with higher packing fraction showed conspicuous evidence of structural damage and content release. Second, monitoring the structure of single TGEV particles in the presence of detergent and alcohol in real time revealed the stages of gradual degradation of the virus structure in situ. These data suggest that detergent is three orders of magnitude more efficient than alcohol in destabilizing TGEV virus particles, paving the way for optimizing hygienic protocols for viruses with similar structure, such as SARS-CoV-2.
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18
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Panatto D, Orsi A, Bruzzone B, Ricucci V, Fedele G, Reiner G, Giarratana N, Domnich A, Icardi G. Efficacy of the Sentinox Spray in Reducing Viral Load in Mild COVID-19 and Its Virucidal Activity against Other Respiratory Viruses: Results of a Randomized Controlled Trial and an In Vitro Study. Viruses 2022; 14:v14051033. [PMID: 35632774 PMCID: PMC9144724 DOI: 10.3390/v14051033] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/10/2022] [Accepted: 05/11/2022] [Indexed: 01/25/2023] Open
Abstract
Sentinox (STX) is an acid-oxidizing solution containing hypochlorous acid in spray whose virucidal activity against SARS-CoV-2 has been demonstrated. In this paper, results of a randomized controlled trial (RCT) on the efficacy of STX in reducing viral load in mild COVID-19 patients (NCT04909996) and a complementary in vitro study on its activity against different respiratory viruses are reported. In the RCT, 57 patients were randomized (1:1:1) to receive STX three (STX-3) or five (STX-5) times/day plus standard therapy or standard therapy only (controls). Compared with controls, the log10 load reduction in groups STX-3 and STX-5 was 1.02 (p = 0.14) and 0.18 (p = 0.80), respectively. These results were likely driven by outliers with extreme baseline viral loads. When considering subjects with baseline cycle threshold values of 20–30, STX-3 showed a significant (p = 0.016) 2.01 log10 reduction. The proportion of subjects that turned negative by the end of treatment (day 5) was significantly higher in the STX-3 group than in controls, suggesting a shorter virus clearance time. STX was safe and well-tolerated. In the in vitro study, ≥99.9% reduction in titers against common respiratory viruses was observed. STX is a safe device with large virucidal spectrum and may reduce viral loads in mild COVID-19 patients.
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Affiliation(s)
- Donatella Panatto
- Department of Health Sciences (DISSAL), University of Genoa, 16132 Genoa, Italy; (D.P.); (A.O.); (G.I.)
| | - Andrea Orsi
- Department of Health Sciences (DISSAL), University of Genoa, 16132 Genoa, Italy; (D.P.); (A.O.); (G.I.)
- Hygiene Unit, San Martino Policlinico Hospital-IRCCS for Oncology and Neurosciences, 16132 Genoa, Italy; (B.B.); (V.R.)
| | - Bianca Bruzzone
- Hygiene Unit, San Martino Policlinico Hospital-IRCCS for Oncology and Neurosciences, 16132 Genoa, Italy; (B.B.); (V.R.)
| | - Valentina Ricucci
- Hygiene Unit, San Martino Policlinico Hospital-IRCCS for Oncology and Neurosciences, 16132 Genoa, Italy; (B.B.); (V.R.)
| | | | - Giorgio Reiner
- APR Applied Pharma Research SA, via Corti 5, CH-6828 Balerna, Switzerland; (G.R.); (N.G.)
| | - Nadia Giarratana
- APR Applied Pharma Research SA, via Corti 5, CH-6828 Balerna, Switzerland; (G.R.); (N.G.)
| | - Alexander Domnich
- Hygiene Unit, San Martino Policlinico Hospital-IRCCS for Oncology and Neurosciences, 16132 Genoa, Italy; (B.B.); (V.R.)
- Correspondence:
| | - Giancarlo Icardi
- Department of Health Sciences (DISSAL), University of Genoa, 16132 Genoa, Italy; (D.P.); (A.O.); (G.I.)
- Hygiene Unit, San Martino Policlinico Hospital-IRCCS for Oncology and Neurosciences, 16132 Genoa, Italy; (B.B.); (V.R.)
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19
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Onodera T, Sakudo A, Iwamaru Y, Yokoyama T, Haritani M, Sugiura K, Shimakura H, Haga T, Onishi R, Furusaki K. Calcium bicarbonate as an antimicrobial, antiviral, and prion‑inhibiting agent (Review). Biomed Rep 2022; 17:57. [PMID: 35719840 PMCID: PMC9198988 DOI: 10.3892/br.2022.1540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 03/24/2022] [Indexed: 11/14/2022] Open
Abstract
Calcium bicarbonate does not act as a disinfectant at neutral pH; however, it exerts strong antimicrobial activity after it is placed in a high-voltage electric field, whereby it assumes an alkaline pH (12.4). Moreover, the microbicidal activity of the resulting solution (named CAC-717) is not influenced by the presence of organic material or resistance of the agent to inactivation. When sprayed on the skin surface, the pH of CAC-717 decreases rapidly to 8.84. CAC-717 comprises fine particles of 50-500 nm. When these mesoscopic crystals are dissolved in water, they destroy the genomes of bacteria or viruses and neutralize the infectious properties of abnormal prion proteins produced in ScN2a cells. The severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) pandemic has resulted in unprecedented international demand for disinfectants. A small titer of SARS-CoV-2 remains infectious even after 30 sec in growth medium at pH 12.4. CAC-717 has exhibited a strong virucidal effect (3.6 to 4.4 log10 decrease) against all examined SARS-CoV-2 isolates, including mutant forms. Similarly, human noroviruses also remain intact at pH 12.4; however, CAC-717 has been shown to cause a 3.25 log10 reduction in norovirus genomic RNA compared to untreated samples. Existing evidence suggests that an unidentified mechanism controls the virucidal activity of CAC-717.
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Affiliation(s)
- Takashi Onodera
- Laboratory of Environmental Science for Sustainable Development, Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo 113‑8657, Japan
| | - Akikazu Sakudo
- School of Veterinary Medicine, Okayama University of Science, Imabari, Ehime 794‑0051, Japan
| | - Yoshifumi Iwamaru
- National Institute of Animal Health, Tsukuba, Ibaraki 305‑1002, Japan
| | - Takashi Yokoyama
- Laboratory of Environmental Science for Sustainable Development, Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo 113‑8657, Japan
| | - Makoto Haritani
- Laboratory of Environmental Science for Sustainable Development, Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo 113‑8657, Japan
| | - Katsuaki Sugiura
- Laboratory of Environmental Science for Sustainable Development, Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo 113‑8657, Japan
| | - Hidekatsu Shimakura
- Division of Infection Control and Disease Prevention, Department of Veterinary Medical Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113‑8657, Japan
| | - Takeshi Haga
- Division of Infection Control and Disease Prevention, Department of Veterinary Medical Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113‑8657, Japan
| | | | - Koichi Furusaki
- Mineral Activation Technical Research Center, Omuta, Fukuoka 836‑0041, Japan
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