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Souza MA, Zanella ML, Vanin GN, Dallepiane FG, Pizzi CYM, Ferreira ER, Fuhr MCS, Piccolo NM, Palhano HS, da Silva Koch J, Souza KR, da Costa UM, Dos Santos VV, Steier L, Bertol CD, Figueiredo JAPD. Antimicrobial action and cytotoxicity of hypochlorous acid obtained from an innovative electrolytic device - An in vitro study. Arch Oral Biol 2024; 163:105966. [PMID: 38657440 DOI: 10.1016/j.archoralbio.2024.105966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 04/01/2024] [Accepted: 04/06/2024] [Indexed: 04/26/2024]
Abstract
OBJECTIVE This study evaluated the antimicrobial effect and cytotoxicity of hypochlorous acid(HClO) obtained from an innovative electrolytic device. DESIGN The root canals of fifty extracted human teeth were inoculated with Enterococcus faecalis and divided into 5 groups (n = 10): DW (control); 2% chlorhexidine gel(CHX); 2.5% sodium hypochlorite(NaOCl); 250 ppm HClO and 500 ppm HClO. The counting of colony forming units evaluated the decontamination potential of each group. Cytotoxicity was evaluated after inoculation of tested protocols in fibroblastic cells for 3 min, calculating the cell viability. Specific statistical analysis was performed (α = 5%). RESULTS The highest bacterial reduction was observed in experimental groups, with no statistical differences from each other (p > 0.05). The highest number of viable cells was observed in control group, followed by 250 ppm HClO and 500 ppm HClO groups, with statistical differences from each other (p < 0.05). CONCLUSIONS It could be concluded that HClO presented high antimicrobial activity and low cytotoxicity at both tested concentrations.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Jordana da Silva Koch
- School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Kellyn Rocca Souza
- School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | | | | | - Liviu Steier
- School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA; Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Chennai, India
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Souza MA, Steier L, Vanin GN, Zanella ML, Pizzi CM, Ferreira ER, Dallepiane FG, Piccolo NM, da Silva Koch J, Souza KR, Costa UMD, Dos Santos VV, Palatynska-Ulatowska A, de Figueiredo JAP. Antimicrobial action, cytotoxicity and erosive potential of hypochlorous acid obtained from an electrolytic device compared with sodium hypochlorite. Clin Oral Investig 2024; 28:282. [PMID: 38683234 DOI: 10.1007/s00784-024-05675-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 04/21/2024] [Indexed: 05/01/2024]
Abstract
OBJECTIVES This study aimed to compare the antimicrobial action, cytotoxicity, cleaning ability, and erosion of dentine of hypochlorous acid (HClO) obtained from an electrolytic device at two different concentrations (Dentaqua) and three concentrations of sodium hypochlorite (NaOCl). METHODS Microbiological test-The root canals of sixty single-rooted extracted human teeth were inoculated with Enterococcus faecalis and divided into 6 groups (n = 10), according to decontamination protocol: DW (control); 1% NaOCl; 2.5% NaOCl; 5.25% NaOCl; 250 ppm HClO and 500 ppm HClO. The colony-forming units were counted to evaluate the decontamination potential of each group, calculating the reduction in bacterial percentage. Cytotoxicity test-Cytotoxicity was evaluated after inoculation of the same tested protocols in fibroblastic cells for 3 min, calculating the cell viability percentages. Specifical statistical analysis was performed (α = 5%). Cleaning ability and erosion-Fifty-six single-rooted bovine lower incisors were divided into seven groups of 8 roots each, being the test groups 1% NaOCl; 2.5% NaOCl; 5,25% NaOCl; 250 ppm HClO and 500 ppm HClO, and a negative and positive control. Negative control was not contaminated, and the other groups were inoculated with Enterococcus faecalis. SEM images were ranked as from the cleanest to the least clean. Erosion was also assessed, being ranked from the least to the most eroded dentine. RESULTS The highest bacterial reduction was observed in experimental groups, with no statistical differences between them (p > 0.05). The highest number of viable cells was observed in control group, followed by 250 ppm HClO and 500 ppm HClO groups, with statistical differences between them (p < 0.05). 1% NaOCl; 2.5% NaOCl; 5.25% NaOCl and 500 ppm HClO displayed the cleanest areas. All sodium hypochlorite groups displayed erosion with higher ranks with greater concentration, while hypochlorous acid did not display any erosion regardless the concentration. CONCLUSIONS It is possible to conclude that HClO obtained from an electrolytic device presented high antimicrobial activity and low cytotoxicity in both tested concentrations. 500 ppm HClO did not display erosion and showed great cleaning ability. CLINICAL RELEVANCE The use of 500 ppm hypochlorous acid may reduce unfavorable behavior of sodium hypochlorite whilst maintaining its antimicrobial action.
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Affiliation(s)
- Matheus Albino Souza
- School of Dentistry, Graduate Program in Dentistry, University of Passo Fundo - UPF. BR 285/São José, Prédio A7, Apto 2, Passo Fundo, RS, CEP: 9052-900, Brazil
| | - Liviu Steier
- School of Dental Medicine, University of Pennsylvania - UPENN, 240 South 40Th Street (40Th & Locust St.), Philadelphia, PA, ZIP19104, USA
| | - Gabriele Nichetti Vanin
- School of Dentistry, Graduate Program in Dentistry, University of Passo Fundo - UPF. BR 285/São José, Prédio A7, Apto 2, Passo Fundo, RS, CEP: 9052-900, Brazil
| | - Mylena Lazareti Zanella
- School of Dentistry, Graduate Program in Dentistry, University of Passo Fundo - UPF. BR 285/São José, Prédio A7, Apto 2, Passo Fundo, RS, CEP: 9052-900, Brazil
| | - Camila Monteiro Pizzi
- School of Dentistry, Graduate Program in Dentistry, University of Passo Fundo - UPF. BR 285/São José, Prédio A7, Apto 2, Passo Fundo, RS, CEP: 9052-900, Brazil
| | - Eduarda Rizzon Ferreira
- School of Dentistry, Graduate Program in Dentistry, University of Passo Fundo - UPF. BR 285/São José, Prédio A7, Apto 2, Passo Fundo, RS, CEP: 9052-900, Brazil
| | - Felipe Gomes Dallepiane
- School of Dentistry, Graduate Program in Dentistry, University of Passo Fundo - UPF. BR 285/São José, Prédio A7, Apto 2, Passo Fundo, RS, CEP: 9052-900, Brazil
| | - Nathan Mateus Piccolo
- School of Dentistry, Graduate Program in Dentistry, University of Passo Fundo - UPF. BR 285/São José, Prédio A7, Apto 2, Passo Fundo, RS, CEP: 9052-900, Brazil
| | - Jordana da Silva Koch
- Graduate Program in Dentistry, Oral Biology Lab, Federal University of Rio Grande do Sul - UFRGS, Rua Sarmento Leite 500 Sala 134, Porto Alegre, RS, CEP90050-170, Brazil
| | - Kellyn Rocca Souza
- Graduate Program in Dentistry, Oral Biology Lab, Federal University of Rio Grande do Sul - UFRGS, Rua Sarmento Leite 500 Sala 134, Porto Alegre, RS, CEP90050-170, Brazil
| | - Ubirajara Maciel da Costa
- School of Veterinary Medicine, State University of Santa Catarina - UDESC, Av. Luiz de Camões, 2090, Conta Dinheiro, Lages, SC, CEP: 88.520-000, Brazil
| | - Vanessa Valgas Dos Santos
- School of Medicine, University of Planalto Catarinense - UNIPLAC, Av. Mal. Castelo Branco 170, Lages, SC, CEP 88526-075, Brazil
| | - Aleksandra Palatynska-Ulatowska
- Department of Endodontics, Medical Faculty, Division of Dentistry, Medical University of Lödz, 251 Pomorska Street, Lödz, 92-213, Poland
| | - José Antônio Poli de Figueiredo
- Graduate Program in Dentistry, Oral Biology Lab, Federal University of Rio Grande do Sul - UFRGS, Rua Sarmento Leite 500 Sala 134, Porto Alegre, RS, CEP90050-170, Brazil.
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Gomes ACG, Maciel JG, Garcia AAMN, Coelho LAS, Rodrigues GM, Porto VC, Polyzois G, Klein MI, Soares S, Urban VM, Neppelenbroek KH. Anti-biofilm effectiveness of protocols for cleaning complete dentures in hospitalized patients: a randomized controlled trial. J Appl Oral Sci 2024; 32:e20230381. [PMID: 38537031 PMCID: PMC10984580 DOI: 10.1590/1678-7757-2022-0381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 01/15/2024] [Accepted: 02/01/2024] [Indexed: 04/01/2024] Open
Abstract
BACKGROUND Denture biofilm acts as a potential reservoir for respiratory pathogens, considerably increasing the risk of lung infections, specifically aspiration pneumonia, mainly 48h after hospital admission. The establishment of a straightforward, affordable, and applicable hygiene protocol in a hospital environment for the effective control of denture biofilm can be particularly useful to prevent respiratory infections or reduce the course of established lung disease. OBJECTIVES To evaluate the anti-biofilm effectiveness of denture cleaning protocols in hospitalized patients. METHODOLOGY The maxillary complete dentures (MCDs) of 340 hospitalized participants were randomly cleaned once using one of the following 17 protocols (n=20): brushing with distilled water, toothpaste, or neutral liquid soap (controls); immersion in chemical solutions (1% sodium hypochlorite, alkaline peroxide, 0.12% or 2% chlorhexidine digluconate), or microwave irradiation (650 W for 3 min) combined or not with brushing. Before and after the application of the protocols, the biofilm of the intaglio surface of the MCDs was evaluated using two methods: denture biofilm coverage area (%) and microbiological quantitative cultures on blood agar and Sabouraud Dextrose Agar (CFU/mL). Data were subjected to the Wilcoxon and Kruskal-Wallis tests (α=0.05). RESULTS All 17 protocols significantly reduced the percentage area of denture biofilm and microbial and fungal load (P<0.05). The highest percentage reductions in the area of denture biofilm were observed for 1% hypochlorite solution with or without brushing and for 2% chlorhexidine solution and microwave irradiation only in association with brushing (P<0.05). The greatest reductions in microbial and fungal load were found for the groups that used solutions of 2% chlorhexidine and 1% hypochlorite and microwave irradiation, regardless of the association with brushing (P<0.05). CONCLUSIONS A single immersion for 10 min in 1% sodium hypochlorite, even in the absence of brushing, proved to be a straightforward, rapid, low-cost, and effective protocol for cleaning the dentures of hospitalized patients.
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Affiliation(s)
- Anna Clara Gurgel Gomes
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Prótese e Periodontia, Bauru, SP, Brasil
| | - Janaina Gomes Maciel
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Prótese e Periodontia, Bauru, SP, Brasil
| | | | - Letycia Accioly Simões Coelho
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais Odontológicos, Bauru, SP, Brasil
| | - Giulia Murcia Rodrigues
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Prótese e Periodontia, Bauru, SP, Brasil
| | - Vinicius Carvalho Porto
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Prótese e Periodontia, Bauru, SP, Brasil
| | - Grigorios Polyzois
- National and Kapodistrian University of Athens, School of Dentistry, Athens, Greece
| | - Marlise Inêz Klein
- Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba, Departamento de Diagnóstico Oral, Piracicaba, SP, Brasil
| | - Simone Soares
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Prótese e Periodontia, Bauru, SP, Brasil
| | | | - Karin Hermana Neppelenbroek
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Prótese e Periodontia, Bauru, SP, Brasil
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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. J Water 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Miura M, Gotoh K, Tanamachi C, Katayama H, Fuketa H, Tomoike H, Kawamura N, Watanabe H, Mihashi M. Microbiological analysis concerning the antibacterial effect of atomized Ionless® hypochlorous acid water in a nursery school environment. J Infect Chemother 2024; 30:123-128. [PMID: 37758000 DOI: 10.1016/j.jiac.2023.09.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 09/13/2023] [Accepted: 09/23/2023] [Indexed: 09/29/2023]
Abstract
INTRODUCTION In daycare centers, infants come in close contact with each other, and contact, droplet, and mouth-to-mouth infections may occur owing to sharing of toys. Additional effective disinfection methods should be considered aside from wiping with disinfectants-including alcohol or sodium hypochlorite solution-for environmental disinfection of daycare centers. We aimed to examine the usefulness of hypochlorous acid water atomization in the effective disinfection of the classroom environment and toys at a nursery school. METHODS Environmental cultures of the nursery and toys were prepared to evaluate the species and bacterial load and to assess the contaminated areas. Staphylococcus aureus petri dishes were placed at high-frequency contact sites, and hypochlorous acid water was atomized to achieve a 0.03-ppm atmospheric chlorine concentration. After the atomization, the amount of S. aureus bacteria on the Petri dish and the changes in bacterial count isolated from the environment and toys were evaluated. RESULTS Hypochlorous acid water atomization was performed for 5 h to avoid condensation. After a 3-h atomization, ≥99.99% of S. aureus was eliminated on petri dishes; furthermore, a significant disinfection effect was observed on environmental bacteria at least 1 h after atomization. For rubber and textile toys, the significant disinfection effect was observed 1 h after atomization, and for plastic toys, the effect was observed 3 h after atomization. CONCLUSIONS Hypochlorous acid water atomization is a useful strategy to disinfect nursery school classrooms.
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Affiliation(s)
- Miho Miura
- Division of Infection Control and Prevention, Kurume University Hospital, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan.
| | - Kenji Gotoh
- Division of Infection Control and Prevention, Kurume University Hospital, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan.
| | - Chiyoko Tanamachi
- Department of Clinical Laboratory Medicine, Kurume University Hospital, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan.
| | - Hideki Katayama
- Division of Infection Control and Prevention, Kurume University Hospital, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan.
| | - Hiroshi Fuketa
- Nipro Corporation, Pharmaceutical Research Laboratories, 14-1, Minamisakae-cho, Kasukabe, Saitama, 344-0057, Japan.
| | - Hideki Tomoike
- Nipro Corporation, Pharmaceutical Research Laboratories, 14-1, Minamisakae-cho, Kasukabe, Saitama, 344-0057, Japan.
| | - Naohisa Kawamura
- Nipro Corporation, Pharmaceutical Research Laboratories, 14-1, Minamisakae-cho, Kasukabe, Saitama, 344-0057, Japan.
| | - Hiroshi Watanabe
- Division of Infection Control and Prevention, Kurume University Hospital, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan.
| | - Mutsuko Mihashi
- International University of Health and Welfare, 137-1, Enokizu, Okawa, Fukuoka, 831-8501, Japan.
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Muramatsu T, Kodama K, Yamada T, Yamada A, Fukuzaki S. Inhalation of gaseous hypochlorous acid and its effect on human respiratory epithelial cells in laboratory model systems. J Microorg Control 2024; 29:39-44. [PMID: 38508761 DOI: 10.4265/jmc.29.1_39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
During the disinfection of indoor spaces using gaseous hypochlorous acid (HOCl(g)), inhalation is the most common route of exposure for humans. In this study, an artificial human respiratory tract model was exposed to 12-140 ppb HOCl(g) at an aspiration flow rate of 800 mL/s for 15 h in a 1 m3 chamber. The respiratory tract model was equipped with 5th order bronchi and all gas-contact parts were made of silicone rubber with no other chlorine-consuming substances. The concentration of HOCl(g) reaching the lung pseudo-space was approximately 47.4% of the HOCl(g) concentrations in the chamber and was calculated to be very close to zero when the chamber concentration was less than 20.5 ppb. The disappearance of HOCl(g) during inhalation is likely due to the adsorption of HOCl(g) on the gas-contact silicone rubber surfaces. The cytotoxicity of HOCl(g) on respiratory epithelial cells was also examined using human air-liquid-interface airway tissue models. Human nasal epithelium and bronchiolar epithelium were exposed to 100 ppb and 500 ppb HOCl(g) for 8 h and 5 d, respectively. No significant effects of HOCl(g) on cell viability and ciliary activity were observed in any cell type, indicating that low concentrations of HOCl(g), less than 500 ppb, had no cytotoxic effect.
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Polat S, Çinar Ç. The effect of the use of the deproteinization agent hypochlorous acid and two different pit and fissure sealant self-adhesive flowable composites upon its bonding with the enamel. J Clin Pediatr Dent 2024; 48:144-151. [PMID: 38239167 DOI: 10.22514/jocpd.2024.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 06/12/2023] [Indexed: 01/23/2024] Open
Abstract
This study evaluates the effect of the deproteinization agents hypochlorous acid and sodium hypochlorite upon the bonding of the two different pit and fissure sealant, self-adhesive flowable composites with the enamel. Thirty-six third molars were randomly divided into six different groups. The groups were formed as follows: Group 1: 37% phosphoric acid + VertiseTM Flow; Group 2: 200 ppm hypochlorous acid + 37% phosphoric acid VertiseTM Flow; Group 3: 5.25% sodium hypochlorite + 37% phosphoric acid + VertiseTM Flow; Group 4: 37% phosphoric acid + Constic; Group 5: 200 ppm hypochlorous acid + 37% phosphoric acid + Constic; Group 6: 5.25% sodium hypochlorite + 37% phosphoric acid + Constic. In each group, samples were obtained that were rectangular prisms in shape (n = 12). Groups to which a deproteinization agent was applied (Groups 2, 3 and 5, 6) showed statistically higher microtensile bonding strength than Group 1, Group 4. There was no statistically significant difference in terms of microtensile bonding strength values between the Groups 3 and the Group 6. The study found that the groups to which deproteinization agents were applied had statistically higher microtensile bonding strength values compared with those groups to which acid and fissure sealants were applied. In this study, it was concluded that the use of fissure-sealing self-adhesive flowable composites after acid application to permanent tooth enamel provides an acceptable bond strength given the limitations of in vitro studies. In line with the results obtained, it was observed that in addition to the removal of the inorganic structure with the application of acid, the removal of the organic structure with the use of deproteinization agent increased the bond strength to the enamel.
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Affiliation(s)
- Simge Polat
- Department of Pediatric Dentistry, Faculty of Dentistry, Gazi University Ankara, 06490 Ankara, Turkey
| | - Çağdaş Çinar
- Department of Pediatric Dentistry, Faculty of Dentistry, Gazi University Ankara, 06490 Ankara, Turkey
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Haddad Y, Chan WC, Ha WN, Conde A, Estevez R, Lopez AP, Gates GC, Rossi-Fedele G. The effect of a preparation containing glycocholic acid on the biocidal efficacy of sodium hypochlorite in a biofilm laboratory model. AUST ENDOD J 2023; 49:503-511. [PMID: 37403810 DOI: 10.1111/aej.12771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 06/18/2023] [Accepted: 06/19/2023] [Indexed: 07/06/2023]
Abstract
This study assessed the antimicrobial effect of sodium hypochlorite (NaOCl) mixtures combined with Keratobacter (KB) using an engineered biofilm root canal model. Clinical and reagent grade NaOCl were mixed with KB (9:1-vol/vol) to assess pH values over 1 min to select the ideal solution with a pH just below the pKa of hypochlorous acid. The samples were randomly divided into five groups: 1% and 4% NaOCl reagents, a mixture of NaOCl:KB using 1% and 4% NaOCl reagents and distilled water. Outcome measures were colony-forming units (CFUs/mL) and positive/negative cultures. No significant differences were observed in the pairwise comparisons between 1%, 4% NaOCl and 4% NaOCl+KB for the outcome CFUs/mL. Only 4% NaOCl presented with negative cultures in all samples, whereas 1% NaOCl and 4% NaOCl+KB had similar results (54% vs. 40%). The addition of KB has a limited effect on the antimicrobial efficacy of 4% NaOCl in this laboratory model.
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Affiliation(s)
| | | | - William Nguyen Ha
- Department of Endodontics, Sydney Dental School, University of Sydney, Sydney, New South Wales, Australia
| | - Antonio Conde
- Postgraduate Program in Endodontics, European University of Madrid, Madrid, Spain
| | - Roberto Estevez
- Postgraduate Program in Endodontics, European University of Madrid, Madrid, Spain
| | - Alejandro Peña Lopez
- Postgraduate Program in Endodontics, European University of Madrid, Madrid, Spain
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Lea TA, Panizza PM, Arthur PG, Bakker AJ, Pinniger GJ. Hypochlorous acid exposure impairs skeletal muscle function and Ca 2+ signalling: implications for Duchenne muscular dystrophy pathology. J Physiol 2023; 601:5257-5275. [PMID: 37864413 DOI: 10.1113/jp285263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 10/09/2023] [Indexed: 10/22/2023] Open
Abstract
Duchenne muscular dystrophy (DMD) is a fatal X-linked disease characterised by severe muscle wasting. The mechanisms underlying the DMD pathology likely involve the interaction between inflammation, oxidative stress and impaired Ca2+ signalling. Hypochlorous acid (HOCl) is a highly reactive oxidant produced endogenously via myeloperoxidase; an enzyme secreted by neutrophils that is significantly elevated in dystrophic muscle. Oxidation of Ca2+ -handling proteins by HOCl may impair Ca2+ signalling. This study aimed to determine the effects of HOCl on skeletal muscle function and its potential contribution to the dystrophic pathology. Extensor digitorum longus (EDL), soleus and interosseous muscles were surgically isolated from anaesthetised C57 (wild-type) and mdx (dystrophic) mice for measurement of ex vivo force production and intracellular Ca2+ concentration. In whole EDL muscle, HOCl (200 μM) significantly decreased maximal force and increased resting muscle tension which was only partially reversible by dithiothreitol. The effects of HOCl (200 μM) on maximal force in slow-twitch soleus were lower than found in the fast-twitch EDL muscle. In single interosseous myofibres, HOCl (10 μM) significantly increased resting intracellular Ca2+ concentration and decreased Ca2+ transient amplitude. These effects of HOCl were reduced by the application of tetracaine, Gd3+ or streptomycin, implicating involvement of ryanodine receptors and transient receptor potential channels. These results demonstrate the potent effects of HOCl on skeletal muscle function potentially mediated by HOCl-induced oxidation to Ca2+ signalling proteins. Hence, HOCl may provide a link between chronic inflammation, oxidative stress and impaired Ca2+ handling that is characteristic of DMD and presents a potential therapeutic target for DMD. KEY POINTS: Duchenne muscular dystrophy is a fatal genetic disease with pathological mechanisms which involve the complex interaction of chronic inflammation, increased reactive oxygen species production and increased cytosolic Ca2+ concentrations. Hypochlorous acid can be endogenously produced by neutrophils via the enzyme myeloperoxidase. Both neutrophil and myeloperoxidase activity are increased in dystrophic mice. This study found that hypochlorous acid decreased muscle force production and increased cytosolic Ca2+ concentrations in isolated muscles from wild-type and dystrophic mice at relatively low concentrations of hypochlorous acid. These results indicate that hypochlorous acid may be key in the Duchenne muscular dystrophy disease pathology and may provide a unifying link between the chronic inflammation, increased reactive oxygen species production and increased cytosolic Ca2+ concentrations observed in Duchenne muscular dystrophy. Hypochlorous acid production may be a potential target for therapeutic treatments of Duchenne muscular dystrophy.
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Affiliation(s)
- Thomas A Lea
- School of Human Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Peter M Panizza
- School of Human Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Peter G Arthur
- School of Molecular Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Anthony J Bakker
- School of Human Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Gavin J Pinniger
- School of Human Sciences, University of Western Australia, Perth, Western Australia, Australia
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Nontaleerak B, Eurtivong C, Weeraphan C, Buncherd H, Chokchaichamnankit D, Srisomsap C, Svasti J, Sukchawalit R, Mongkolsuk S. The redox-sensing mechanism of Agrobacterium tumefaciens NieR as a thiol-based oxidation sensor for hypochlorite stress. Free Radic Biol Med 2023; 208:211-220. [PMID: 37544488 DOI: 10.1016/j.freeradbiomed.2023.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 07/20/2023] [Accepted: 08/01/2023] [Indexed: 08/08/2023]
Abstract
NieR is a TetR family transcriptional repressor previously shown to regulate the NaOCl-inducible efflux pump NieAB in Agrobacterium tumefaciens. NieR is an ortholog of Escherichia coli NemR that specifically senses hypochlorite through the redox switch of a reversible sulfenamide bond between C106 and K175. The amino acid sequence of NieR contains only one cysteine. NieR has C104 and R166, which correspond to C106 and K175 of NemR, respectively. The aim of this study was to investigate the redox-sensing mechanism of NieR under NaOCl stress. C104 and R166 were subjected to mutagenesis to determine their roles. Although the substitution of R166 by alanine slightly reduced its DNA-binding activity, NieR retained its repressor function. By contrast, the DNA-binding and repression activities of NieR were completely lost when C104 was replaced by alanine. C104 substitution with serine only partially impaired the repressor function. Mass spectrometry analysis revealed an intermolecular disulfide bond between the C104 residues of NieR monomers. This study demonstrates the engagement of C104 in the mechanism of NaOCl sensing. C104 oxidation induced the formation of a disulfide-linked dimer that was likely to alter conformation, thus abolishing the DNA-binding ability of NieR and derepressing the target genes.
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Affiliation(s)
- Benya Nontaleerak
- Laboratory of Biotechnology, Chulabhorn Research Institute, Lak Si, Bangkok, 10210, Thailand
| | - Chatchakorn Eurtivong
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Mahidol University, 447 Si Ayutthaya Road, Ratchathewi, Bangkok 10400, Thailand
| | - Churat Weeraphan
- Laboratory of Biochemistry, Chulabhorn Research Institute, Lak Si, Bangkok 10210, Thailand
| | - Hansuk Buncherd
- Laboratory of Biochemistry, Chulabhorn Research Institute, Lak Si, Bangkok 10210, Thailand; Faculty of Medical Technology, Prince of Songkla University, Songkhla 90112, Thailand; Medical Science Research and Innovation Institute, Prince of Songkla University, Songkhla 90112, Thailand
| | | | - Chantragan Srisomsap
- Laboratory of Biochemistry, Chulabhorn Research Institute, Lak Si, Bangkok 10210, Thailand
| | - Jisnuson Svasti
- Laboratory of Biochemistry, Chulabhorn Research Institute, Lak Si, Bangkok 10210, Thailand
| | - Rojana Sukchawalit
- Laboratory of Biotechnology, Chulabhorn Research Institute, Lak Si, Bangkok, 10210, Thailand; Program in Applied Biological Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Bangkok 10210, Thailand; Center of Excellence on Environmental Health and Toxicology (EHT), OPS, MHESI, Thailand.
| | - Skorn Mongkolsuk
- Laboratory of Biotechnology, Chulabhorn Research Institute, Lak Si, Bangkok, 10210, Thailand; Center of Excellence on Environmental Health and Toxicology (EHT), OPS, MHESI, Thailand
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11
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Crompton ME, Gaessler LF, Tawiah PO, Polzer L, Camfield SK, Jacobson GD, Naudszus MK, Johnson C, Meurer K, Bennis M, Roseberry B, Sultana S, Dahl JU. Expression of RcrB confers resistance to hypochlorous acid in uropathogenic Escherichia coli. J Bacteriol 2023; 205:e0006423. [PMID: 37791752 PMCID: PMC10601744 DOI: 10.1128/jb.00064-23] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 08/25/2023] [Indexed: 10/05/2023] Open
Abstract
To eradicate bacterial pathogens, neutrophils are recruited to the sites of infection, where they engulf and kill microbes through the production of reactive oxygen and chlorine species (ROS/RCS). The most prominent RCS is the antimicrobial oxidant hypochlorous acid (HOCl), which rapidly reacts with various amino acid side chains, including those containing sulfur and primary/tertiary amines, causing significant macromolecular damage. Pathogens like uropathogenic Escherichia coli (UPEC), the primary causative agent of urinary tract infections, have developed sophisticated defense systems to protect themselves from HOCl. We recently identified the RcrR regulon as a novel HOCl defense strategy in UPEC. Expression of the rcrARB operon is controlled by the HOCl-sensing transcriptional repressor RcrR, which is oxidatively inactivated by HOCl resulting in the expression of its target genes, including rcrB. The rcrB gene encodes a hypothetical membrane protein, deletion of which substantially increases UPEC's susceptibility to HOCl. However, the mechanism behind protection by RcrB is unclear. In this study, we investigated whether (i) its mode of action requires additional help, (ii) rcrARB expression is induced by physiologically relevant oxidants other than HOCl, and (iii) expression of this defense system is limited to specific media and/or cultivation conditions. We provide evidence that RcrB expression is sufficient to protect E. coli from HOCl. Furthermore, RcrB expression is induced by and protects from several RCS but not from ROS. RcrB plays a protective role for RCS-stressed planktonic cells under various growth and cultivation conditions but appears to be irrelevant for UPEC's biofilm formation. IMPORTANCE Bacterial infections pose an increasing threat to human health, exacerbating the demand for alternative treatments. Uropathogenic Escherichia coli (UPEC), the most common etiological agent of urinary tract infections (UTIs), are confronted by neutrophilic attacks in the bladder, and must therefore be equipped with powerful defense systems to fend off the toxic effects of reactive chlorine species. How UPEC deal with the negative consequences of the oxidative burst in the neutrophil phagosome remains unclear. Our study sheds light on the requirements for the expression and protective effects of RcrB, which we recently identified as UPEC's most potent defense system toward hypochlorous acid (HOCl) stress and phagocytosis. Thus, this novel HOCl stress defense system could potentially serve as an attractive drug target to increase the body's own capacity to fight UTIs.
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Affiliation(s)
- Mary E. Crompton
- Microbiology, School of Biological Sciences, Illinois State University, Normal, Illinois, USA
| | - Luca F. Gaessler
- Microbiology, School of Biological Sciences, Illinois State University, Normal, Illinois, USA
| | - Patrick O. Tawiah
- Microbiology, School of Biological Sciences, Illinois State University, Normal, Illinois, USA
| | - Lisa Polzer
- Microbiology, School of Biological Sciences, Illinois State University, Normal, Illinois, USA
| | - Sydney K. Camfield
- Microbiology, School of Biological Sciences, Illinois State University, Normal, Illinois, USA
| | - Grady D. Jacobson
- Microbiology, School of Biological Sciences, Illinois State University, Normal, Illinois, USA
| | - Maren K. Naudszus
- Microbiology, School of Biological Sciences, Illinois State University, Normal, Illinois, USA
| | - Colton Johnson
- Microbiology, School of Biological Sciences, Illinois State University, Normal, Illinois, USA
| | - Kennadi Meurer
- Microbiology, School of Biological Sciences, Illinois State University, Normal, Illinois, USA
| | - Mehdi Bennis
- Microbiology, School of Biological Sciences, Illinois State University, Normal, Illinois, USA
| | - Brendan Roseberry
- Microbiology, School of Biological Sciences, Illinois State University, Normal, Illinois, USA
| | - Sadia Sultana
- Microbiology, School of Biological Sciences, Illinois State University, Normal, Illinois, USA
| | - Jan-Ulrik Dahl
- Microbiology, School of Biological Sciences, Illinois State University, Normal, Illinois, USA
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12
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Bayraktar G, Yılmaz Göler AM, Aksu B, Öztürk Özener H. Efficacy of hypochlorous acid as an alternative oral antimicrobial agent on human gingival fibroblasts, Aggregatibacter actinomycetemcomitans, and Candida albicans biofilms in vitro. Biofouling 2023; 39:980-989. [PMID: 38018019 DOI: 10.1080/08927014.2023.2288071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 11/21/2023] [Indexed: 11/30/2023]
Abstract
This study compared the cytotoxicity and antimicrobial activity of hypochlorous acid (HOCl) at 50 ppm and 200 ppm and 0.2% chlorhexidine (CHX) at various time intervals, in vitro. Cell viability and cytotoxicity of human gingival fibroblasts (HGF) were evaluated using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) test and the lactate dehydrogenase assay. Antimicrobial effects on Aggregatibacter actinomycetemcomitans and Candida albicans were determined using the time-kill method. All solutions exhibited a significant impact on HGFs in a dose- and time-dependent manner. 50 ppm HOCl demonstrated the highest cell viability, followed by 200 ppm HOCl. Both HOCl solutions were less cytotoxic to HGFs than 0.2% CHX. 50 ppm and 200 ppm HOCl demonstrated stronger efficiencies than CHX against A. actinomycetemcomitans and C. albicans. The data suggest that HOCl solutions have potential as an alternative antiseptic to CHX due to their lower cytotoxicity and superior antimicrobial activity, but optimal dosage of HOCl requires further investigations.
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Affiliation(s)
- Gözdem Bayraktar
- Department of Periodontology, Institute of Health Sciences, Marmara University, Istanbul, Turkey
| | | | - Burak Aksu
- Department of Medical Microbiology, School of Medicine, Marmara University, Istanbul, Turkey
- Department of Medical Microbiology, Faculty of Medicine, Eastern Mediterranean University, Famagusta, Turkey
| | - Hafize Öztürk Özener
- Department of Periodontology, Faculty of Dentistry, Marmara University, Istanbul, Turkey
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Harper A, Chapel M, Hodgson G, Malinowski K, Yates I, Garle M, Ralevic V. GYY4137, a hydrogen sulfide donor, protects against endothelial dysfunction in porcine coronary arteries exposed to myeloperoxidase and hypochlorous acid. Vascul Pharmacol 2023; 152:107199. [PMID: 37500030 DOI: 10.1016/j.vph.2023.107199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 07/12/2023] [Accepted: 07/24/2023] [Indexed: 07/29/2023]
Abstract
BACKGROUND AND AIMS Myeloperoxidase (MPO) and its principal reaction product hypochlorous acid (HOCl) are part of the innate immune response but are also associated with endothelial dysfunction, thought to involve a reduction in nitric oxide (NO) bioavailability. We aimed to investigate the effect of MPO and HOCl on vasorelaxation of coronary arteries and to assess directly the involvement of NO. In addition, we hypothesised that the slow release hydrogen sulfide (H2S) donor GYY4137 would salvage coronary artery endothelial function in the presence of MPO and HOCl. METHODS AND RESULTS Contractility of porcine coronary artery segments was measured using isometric tension recording. Incubation with MPO (50 ng/ml) plus hydrogen peroxide (H2O2) (30 μM; substrate for MPO) impaired endothelium-dependent vasorelaxation to bradykinin in coronary arteries. HOCl (10-500 μM) also impaired endothelium-dependent relaxations. There was no effect of MPO plus H2O2, or HOCl, on endothelium-independent relaxations to 5'-N-ethylcarboxamidoadenosine and sodium nitroprusside. L-NAME (300 μM), a NO synthase inhibitor, attenuated bradykinin relaxations, leaving L-NAME-resistant relaxations to bradykinin mediated by endothelium-dependent hyperpolarization. In the presence of L-NAME, MPO plus H2O2 largely failed to impair endothelium-dependent relaxations to bradykinin. Similarly, HOCl failed to inhibit endothelium-dependent relaxations to bradykinin in the presence of L-NAME. GYY4137 (1-100 μM) protected endothelium-dependent relaxations to bradykinin from dysfunction caused by MPO plus H2O2, and HOCl, with no effect alone on bradykinin relaxation responses. The specific MPO inhibitor aminobenzoic acid hydrazide (ABAH) (1 and 10 μM) also protected against MPO plus H2O2-induced endothelial dysfunction (at 10 μM ABAH), but was less potent than GYY4137. CONCLUSIONS MPO plus H2O2, and HOCl, impair coronary artery endothelium-dependent vasorelaxation via inhibition of NO. GYY4137 protects against endothelial dysfunction in arteries exposed to MPO plus H2O2, and HOCl. H2S donors such as GYY4137 are possible therapeutic options to control excessive MPO activity in cardiovascular diseases.
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Affiliation(s)
- Andrew Harper
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Maike Chapel
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Grace Hodgson
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | | | - Imogen Yates
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Michael Garle
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Vera Ralevic
- School of Life Sciences, University of Nottingham, Nottingham, UK.
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14
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Kletzer J, Raval YS, Mohamed A, Mandrekar JN, Greenwood-Quaintance KE, Beyenal H, Patel R. In vitro activity of hypochlorous acid generating electrochemical bandage against monospecies and dual-species bacterial biofilms. J Appl Microbiol 2023; 134:lxad194. [PMID: 37667489 PMCID: PMC10508963 DOI: 10.1093/jambio/lxad194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 08/18/2023] [Accepted: 08/28/2023] [Indexed: 09/06/2023]
Abstract
AIMS As antimicrobial resistance is on the rise, treating chronic wound infections is becoming more complex. The presence of biofilms in wound beds contributes to this challenge. Here, the activity of a novel hypochlorous acid (HOCl) producing electrochemical bandage (e-bandage) against monospecies and dual-species bacterial biofilms formed by bacteria commonly found in wound infections was assessed. METHODS AND RESULTS The system was controlled by a wearable potentiostat powered by a 3V lithium-ion battery and maintaining a constant voltage of + 1.5V Ag/AgCl, allowing continuous generation of HOCl. A total of 19 monospecies and 10 dual-species bacterial biofilms grown on polycarbonate membranes placed on tryptic soy agar (TSA) plates were used as wound biofilm models, with HOCl producing e-bandages placed over the biofilms. Viable cell counts were quantified after e-bandages were continuously polarized for 2, 4, 6, and 12 hours. Time-dependent reductions in colony forming units (CFUs) were observed for all studied isolates. After 12 hours, average CFU reductions of 7.75 ± 1.37 and 7.74 ± 0.60 log10 CFU/cm2 were observed for monospecies and dual-species biofilms, respectively. CONCLUSIONS HOCl producing e-bandages reduce viable cell counts of in vitro monospecies and dual-species bacterial biofilms in a time-dependent manner in vitro. After 12 hours, >99.999% reduction in cell viability was observed for both monospecies and dual-species biofilms.
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Affiliation(s)
- Joseph Kletzer
- Paracelsus Medical University, Salzburg 5020, Austria
- Division of Clinical Microbiology, Mayo Clinic Rochester, Rochester, MN 55905, United States
| | - Yash S Raval
- Division of Clinical Microbiology, Mayo Clinic Rochester, Rochester, MN 55905, United States
| | - Abdelrhman Mohamed
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99164, United States
| | - Jayawant N Mandrekar
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN 55905, United States
| | | | - Haluk Beyenal
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99164, United States
| | - Robin Patel
- Division of Clinical Microbiology, Mayo Clinic Rochester, Rochester, MN 55905, United States
- Division of Public Health, Infectious Diseases, and Occupational Medicine, Mayo Clinic, Rochester, MN 55905, United States
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15
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Arslan S, Balkaya H, Durukan SM, Silici S. The effect of propolis on the bond strength of composite resin to enamel after intracoronal bleaching with different bleaching agents. AUST ENDOD J 2023; 49 Suppl 1:366-373. [PMID: 36960971 DOI: 10.1111/aej.12750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 03/06/2023] [Indexed: 03/25/2023]
Abstract
This study evaluated the effect of propolis as an antioxidant agent on bond strength to enamel after intracoronal bleaching. A total of 160 incisors were endodontically treated. Sixteen teeth were served as control, and the remaining teeth were randomly divided into three main groups according to the bleaching agent used; group 1: Sodium perborate (SP); group 2: Carbamide peroxide (CP); group 3: Hydrogen peroxide (HP). After bleaching, the samples were divided into three subgroups; subgroup A: no antioxidant agent application, subgroup B: sodium ascorbate (SA), subgroup C: propolis (PP). After the antioxidant agents application, the sample's surfaces were washed and dried. After adhesive application, composite resin cylinders were applied to enamel surfaces using tygon tubes and a shear bond strength test was performed. The use of PP significantly decreased the bond strength of composite resin to the enamel (p < 0.05). Using propolis as an antioxidant agent adversely affects the bond strength to enamel after intracoronal bleaching.
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Affiliation(s)
- Soley Arslan
- Department of Restorative Dentistry, Erciyes University Faculty of Dentistry, Kayseri, Turkey
| | - Hacer Balkaya
- Department of Restorative Dentistry, Erciyes University Faculty of Dentistry, Kayseri, Turkey
| | - Sebahat Melike Durukan
- Department of Restorative Dentistry, Erciyes University Faculty of Dentistry, Kayseri, Turkey
| | - Sibel Silici
- Department of Agricultural Biotechnology, Nutral Therapy Co. Erciyes Technopark, Erciyes University Faculty of Agriculture, Kayseri, Turkey
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Anoy MMI, Gelston S, Mohamed A, Flurin L, Raval YS, Greenwood-Quaintance K, Patel R, Lewandowski Z, Beyenal H. Hypochlorous acid produced at the counter electrode inhibits catalase and increases bactericidal activity of a hydrogen peroxide generating electrochemical bandage. Bioelectrochemistry 2022; 148:108261. [PMID: 36115186 PMCID: PMC10080710 DOI: 10.1016/j.bioelechem.2022.108261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 08/22/2022] [Accepted: 09/05/2022] [Indexed: 11/20/2022]
Abstract
Previously, an electrochemical bandage (e-bandage) that uses a three-electrode system to produce hydrogen peroxide (H2O2) electrochemically on its working electrode was developed as a potential strategy for treating biofilms; it showed activity in reducing biofilms in an agar biofilm model. Xanthan gum-based hydrogel, including NaCl, was used as the electrolyte. While H2O2 generated at the working electrode in the vicinity of a biofilm is a main mechanism of activity, the role of the counter electrode was not explored. The goal of this research was to characterize electrochemical reactions occurring on the counter electrode of the e-bandage. Counter electrode potential varied between 1.2 and 1.5 VAg/AgCl; ∼125 µM hypochlorous acid (HOCl) was generated within 24 h in the e-bandage system. When HOCl was not produced on the counter electrode (achieved by removing NaCl from the hydrogel), reduction of Acinetobacter baumannii BAA-1605 biofilm was 1.08 ± 0.38 log10 CFU/cm2 after 24 h treatment, whereas when HOCl was produced, reduction was 3.87 ± 1.44 log10 CFU/cm2. HOCl inhibited catalase activity, abrogating H2O2 decomposition. In addition to H2O2 generation, the previously described H2O2-generating e-bandage generates HOCl on the counter electrode, enhancing its biocidal activity.
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Affiliation(s)
- Md Monzurul Islam Anoy
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, USA.
| | - Suzanne Gelston
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, USA.
| | - Abdelrhman Mohamed
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, USA.
| | - Laure Flurin
- Division of Clinical Microbiology, Mayo Clinic, Rochester, MN, USA.
| | - Yash S Raval
- Division of Clinical Microbiology, Mayo Clinic, Rochester, MN, USA.
| | | | - Robin Patel
- Division of Clinical Microbiology, Mayo Clinic, Rochester, MN, USA; Division of Public Health, Infectious Diseases and Occupational Medicine, Mayo Clinic, Rochester, MN, USA.
| | - Zbigniew Lewandowski
- Center for Biofilm Engineering, Montana State University-Bozeman, Bozeman, MT, USA.
| | - Haluk Beyenal
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, USA.
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Cui X, Wen J, Li N, Hao X, Zhang S, Zhao B, Wu X, Miao J. HOCI Probe CPP Induces the Differentiation of Human Dermal Fibroblasts into Vascular Endothelial Cells through PHD2/HIF-1α/HEY1 Signaling Pathway. Cells 2022; 11:cells11193126. [PMID: 36231088 PMCID: PMC9562224 DOI: 10.3390/cells11193126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/26/2022] [Accepted: 10/01/2022] [Indexed: 11/23/2022] Open
Abstract
Human dermal fibroblasts (HDFs) have the potential to differentiate into endothelial cells (VECs). In our previous research, we reported that a hypochlorous acid (HOCl) probe CPP efficiently induced the differentiation of HDFs into VECs, however, the mechanism of differentiation was not clear. As an HOCI probe, CPP binds HOCI to modulate its effects. In this study, through Western blotting, qPCR, and PHD2 enzyme activity assay, we found that CPP inhibited the enzyme activity of prolyl-4-hydroxylase 2 (PHD2), thereby stabilizing HIF-1α. To further clarify the mechanism by which CPP inhibits PHD2 enzyme activity, we constructed plasmids, and found that CPP inhibited PHD2 activity to increase the HIF-1α level through the modulation of PHD2 at Cys302 by HOCl in HDFs. Furthermore, RNA-seq experiments showed that CPP could induce the expression of HEY1, which is not only a target gene regulated by HIF1α, but also a key transcription factor for VECs. We used siRNA transfection and in vivo experiments to confirm that CPP could induce HDFs to differentiate into VECs by HEY1. In summary, we identified a new inhibitor of PHD2, demonstrated the new role of HOCl in cell differentiation, and elucidated the mechanism by which HOCl probe CPP induced the differentiation of HDFs into VECs.
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Affiliation(s)
- Xiaoling Cui
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao 266237, China
| | - Jie Wen
- School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250117, China
| | - Nan Li
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao 266237, China
| | - Xuxiao Hao
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao 266237, China
| | - Shangli Zhang
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao 266237, China
| | - Baoxiang Zhao
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Xunwei Wu
- Engineering Laboratory for Biomaterials and Tissue Regeneration, Ningbo Stomatology Hospital, Ningbo 315040, China
- Savaid Stomatology School, Hangzhou Medical College, Hangzhou 310058, China
- Correspondence: (X.W.); (J.M.)
| | - Junying Miao
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao 266237, China
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Shandong University Qilu Hospital, Chinese Ministry of Education and Chinese Ministry of Health, Jinan 250012, China
- Correspondence: (X.W.); (J.M.)
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Sanon K, Tichy A, Hatayama T, Thanatvarakorn O, Prasansuttiporn T, Wada T, Shimada Y, Hosaka K, Nakajima M. Addition of metal chlorides to a HOCl conditioner can enhance bond strength to smear layer deproteinized dentin. Dent Mater 2022; 38:1235-1247. [PMID: 35715250 DOI: 10.1016/j.dental.2022.06.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 05/02/2022] [Accepted: 06/05/2022] [Indexed: 11/18/2022]
Abstract
OBJECTIVES To evaluate the effect of smear layer deproteinization using hypochlorous acid (HOCl) with/without metal chlorides (SrCl2 and ZnCl2) on the microtensile bond strength (µTBS) of two simplified adhesives to dentin. METHODS Human dentin surfaces with a standardized smear layer were pretreated using a 105 ppm HOCl solution with/without SrCl2 (0.05 M, 0.1 M, 0.2 M, 0.4 M) or ZnCl2 (0.05 M, 0.1 M, 0.2 M) for 5 s, 15 s, or 30 s. After the deproteinizing solution was washed out with water for 5 s, 15 s, or 30 s, pretreated surfaces were bonded with one-step self-etch adhesive Bond Force II or universal adhesive Clearfil Universal Bond Quick, and µTBS was measured after 24 h. Additionally, the deproteinizing effects of HOCl solutions with/without the metal chlorides were compared by measuring changes in the amide:phosphate ratio using attenuated total reflection Fourier transform infrared spectroscopy. Statistical analysis was performed using multifactor ANOVA, Tukey's post hoc tests and t-tests (p < 0.05). RESULTS Pretreatment with pure HOCl for 15 s and 30 s significantly decreased the amide:phosphate ratio (p < 0.05), indicating effective deproteinization, but the µTBS of both adhesives increased significantly only if HOCl was washed out for 30 s (p < 0.05). Increasing the concentrations of metal chlorides enabled shortening of the wash-out time down to 5 s while maintaining the improved µTBS (p < 0.05). The deproteinizing effect of HOCl was not significantly altered by the addition of metal chlorides (p > 0.05). SIGNIFICANCE The effectiveness of smear layer deproteinization using HOCl can be improved by the addition of metal chlorides, as their increasing concentration allowed to shorten the wash-out time from 30 s down to 5 s.
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Affiliation(s)
- Kittisak Sanon
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan; Department of Operative Dentistry, Faculty of Dentistry, Chulalongkorn University, 34 Henri Dunant Road, Pathumwan, Bangkok 10330, Thailand
| | - Antonin Tichy
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan; Institute of Dental Medicine, First Faculty of Medicine of the Charles University and General University Hospital in Prague, Karlovo namesti 32, Prague 121 11, Czech Republic
| | - Takashi Hatayama
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
| | - Ornnicha Thanatvarakorn
- Faculty of Dentistry, Bangkokthonburi University, 16/10 Leab Klong Taweewatana Rd., Taweewatana, Bangkok 10170, Thailand
| | - Taweesak Prasansuttiporn
- Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiang Mai University, Suthep, Muang Chiang Mai, Chiang Mai 50200, Thailand; Center of Excellence in Materials Science and Technology, Chiang Mai University, Suthep, Muang Chiang Mai, Chiang Mai 50200, Thailand
| | - Takahiro Wada
- Department of Advanced Biomaterials, Graduate School of Medical and Dental Sciences, Medical and Dental Science and Technology, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
| | - Yasushi Shimada
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
| | - Keiichi Hosaka
- Department of Regenerative Dental Medicine, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramotocho, Tokushima 770-8504, Japan
| | - Masatoshi Nakajima
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan; Department of Regenerative Dental Medicine, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramotocho, Tokushima 770-8504, Japan.
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Urushidani M, Kawayoshi A, Kotaki T, Saeki K, Mori Y, Kameoka M. Inactivation of SARS-CoV-2 and influenza A virus by dry fogging hypochlorous acid solution and hydrogen peroxide solution. PLoS One 2022; 17:e0261802. [PMID: 35389997 PMCID: PMC8989197 DOI: 10.1371/journal.pone.0261802] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 03/23/2022] [Indexed: 11/26/2022] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of coronavirus disease 2019 (COVID-19), is transmitted mainly by droplet or aerosol infection; however, it may also be transmitted by contact infection. SARS-CoV-2 that adheres to environmental surfaces remains infectious for several days. We herein attempted to inactivate SARS-CoV-2 and influenza A virus adhering to an environmental surface by dry fogging hypochlorous acid solution and hydrogen peroxide solution. SARS-CoV-2 and influenza virus were air-dried on plastic plates and placed into a test chamber for inactivation by the dry fogging of these disinfectants. The results obtained showed that the dry fogging of hypochlorous acid solution and hydrogen peroxide solution inactivated SARS-CoV-2 and influenza A virus in CT value (the product of the disinfectant concentration and contact time)-dependent manners. SARS-CoV-2 was more resistant to the virucidal effects of aerosolized hypochlorous acid solution and hydrogen peroxide solution than influenza A virus; therefore, higher concentrations of disinfectants or longer contact times were required to inactivate SARS-CoV-2 than influenza A virus. The present results provide important information for the development of a strategy that inactivates SARS-CoV-2 and influenza A virus on environmental surfaces by spatial fogging.
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Affiliation(s)
| | - Akira Kawayoshi
- Disinfection Division, H. Ikeuchi & Co., Ltd., Nishiwaki, Hyogo, Japan
| | - Tomohiro Kotaki
- Division of Global Infectious Diseases, Department of Public Health, Kobe University Graduate School of Health Sciences, Kobe, Hyogo, Japan
- Department of Virology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Keiichi Saeki
- Laboratory of Microbiology and Immunology, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo, Japan
| | - Yasuko Mori
- Division of Clinical Virology, Center for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - Masanori Kameoka
- Division of Global Infectious Diseases, Department of Public Health, Kobe University Graduate School of Health Sciences, Kobe, Hyogo, Japan
- * E-mail:
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20
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Urushidani M, Kawayoshi A, Kotaki T, Saeki K, Mori Y, Kameoka M. Inactivation of SARS-CoV-2 and influenza A virus by dry fogging hypochlorous acid solution and hydrogen peroxide solution. PLoS One 2022; 17:e0261802. [PMID: 35389997 DOI: 10.1101/2021.12.13.472413] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 03/23/2022] [Indexed: 05/27/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of coronavirus disease 2019 (COVID-19), is transmitted mainly by droplet or aerosol infection; however, it may also be transmitted by contact infection. SARS-CoV-2 that adheres to environmental surfaces remains infectious for several days. We herein attempted to inactivate SARS-CoV-2 and influenza A virus adhering to an environmental surface by dry fogging hypochlorous acid solution and hydrogen peroxide solution. SARS-CoV-2 and influenza virus were air-dried on plastic plates and placed into a test chamber for inactivation by the dry fogging of these disinfectants. The results obtained showed that the dry fogging of hypochlorous acid solution and hydrogen peroxide solution inactivated SARS-CoV-2 and influenza A virus in CT value (the product of the disinfectant concentration and contact time)-dependent manners. SARS-CoV-2 was more resistant to the virucidal effects of aerosolized hypochlorous acid solution and hydrogen peroxide solution than influenza A virus; therefore, higher concentrations of disinfectants or longer contact times were required to inactivate SARS-CoV-2 than influenza A virus. The present results provide important information for the development of a strategy that inactivates SARS-CoV-2 and influenza A virus on environmental surfaces by spatial fogging.
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Affiliation(s)
| | - Akira Kawayoshi
- Disinfection Division, H. Ikeuchi & Co., Ltd., Nishiwaki, Hyogo, Japan
| | - Tomohiro Kotaki
- Division of Global Infectious Diseases, Department of Public Health, Kobe University Graduate School of Health Sciences, Kobe, Hyogo, Japan
- Department of Virology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Keiichi Saeki
- Laboratory of Microbiology and Immunology, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo, Japan
| | - Yasuko Mori
- Division of Clinical Virology, Center for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - Masanori Kameoka
- Division of Global Infectious Diseases, Department of Public Health, Kobe University Graduate School of Health Sciences, Kobe, Hyogo, Japan
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21
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KOLUMAN A, AKTAŞ A, ADİLOĞLU S. Antimicrobial activities of Ankaferd BloodStopper, hypochlorous acid, and chlorhexidine against specific organisms. Turk J Med Sci 2022; 52:276-278. [PMID: 34688239 PMCID: PMC10734848 DOI: 10.3906/sag-2107-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 02/22/2022] [Accepted: 10/17/2021] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND METHODS RESULTS DISCUSSION
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Affiliation(s)
- Ahmet KOLUMAN
- Department of Biomedical Engineering, Faculty of Technology, Pamukkale University, Denizli,
Turkey
| | - Alper AKTAŞ
- Department of Oral Maxillofacial Surgery, Faculty of Dentistry, Hacettepe University, Ankara,
Turkey
| | - Selen ADİLOĞLU
- Department of Oral Maxillofacial Surgery, Faculty of Dentistry, Hacettepe University, Ankara,
Turkey
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22
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Miyaoka Y, Yamaguchi M, Kadota C, Hasan MA, Kabir MH, Shoham D, Murakami H, Takehara K. Rapid in vitro virucidal activity of slightly acidic hypochlorous acid water toward aerosolized coronavirus in simulated human-dispersed droplets. Virus Res 2022; 311:198701. [PMID: 35093473 PMCID: PMC8799933 DOI: 10.1016/j.virusres.2022.198701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/26/2021] [Accepted: 01/26/2022] [Indexed: 11/16/2022]
Abstract
The virucidal activities were evaluated by spraying slightly acidic hypochlorous acid waters (SAHWs) containing various concentrations of free available chlorine - 100, 200, 300 and 500 ppm (SAHW-100, -200, -300 and -500, respectively) - toward aerosol of an avian coronavirus (infectious bronchitis virus: IBV). The viral solution was supplemented with 0.5% fetal bovine serum (FBS) to simulate normal human droplets generated by sneezing or coughing in a real-life scenario. The virus containing 0.5% FBS was sprayed and exposed to SAHWs for a few seconds in a closed chamber, before reaching the air sampler. The results showed that IBV exposed to SAHW-100 and -200 for a few seconds decreased by 0.21 log10 and 0.80 log10, respectively, compared to the pre-exposed samples to SAHWs as controls. On the other hand, reductions of 1.16 log10 and 1.67 log10 were achieved following the exposure to SAHW-300 and -500, respectively, within a few seconds. These results suggest that SAHWs have rapid in vitro virucidal activity toward aerosolized IBV. The findings obtained for IBV might basically be applicable in relation to SARS-CoV-2, given the resemblance between the two viruses. To prevent human-to-human transmissions by aerosols, the inactivation of viruses in the air by exposure to SAHWs for a few seconds seems to be an effective way.
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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, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Makiko Yamaguchi
- Laboratory of Animal Health, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Chisaki Kadota
- Laboratory of Animal Health, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Md Amirul Hasan
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Md Humayun Kabir
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Dany Shoham
- Bar-Ilan University, Begin-Sadat Center for Strategic Studies, Ramat Gan 5290002, Israel
| | - Harumi Murakami
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan; Laboratory of Animal Health, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Kazuaki Takehara
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan; Laboratory of Animal Health, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan.
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23
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Papanicolaou M, He P, Rutting S, Ammit A, Xenaki D, van Reyk D, Oliver BG. Extracellular Matrix Oxidised by the Granulocyte Oxidants Hypochlorous and Hypobromous Acid Reduces Lung Fibroblast Adhesion and Proliferation In Vitro. Cells 2021; 10:3351. [PMID: 34943857 PMCID: PMC8699380 DOI: 10.3390/cells10123351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 11/25/2021] [Accepted: 11/26/2021] [Indexed: 11/17/2022] Open
Abstract
Chronic airway inflammation and oxidative stress play crucial roles in the pathogenesis of chronic inflammatory lung diseases, with airway inflammation being a key driving mechanism of oxidative stress in the lungs. Inflammatory responses in the lungs activate neutrophils and/or eosinophils, leading to the generation of hypohalous acids (HOX). These HOX oxidants can damage the extracellular matrix (ECM) structure and may influence cell-ECM interactions. The ECM of the lung provides structural, mechanical, and biochemical support for cells and determines the airway structure. One of the critical cells in chronic respiratory disease is the fibroblast. Thus, we hypothesised that primary human lung fibroblasts (PHLF) exposed to an oxidised cell-derived ECM will result in functional changes to the PHLF. Here, we show that PHLF adhesion, proliferation, and inflammatory cytokine secretion is affected by exposure to HOX-induced oxidisation of the cell-derived ECM. Furthermore, we investigated the impact on fibroblast function from the presence of haloamines in the ECM. Haloamines are chemical by-products of HOX and, like the HOX, haloamines can also modify the ECM. In conclusion, this study revealed that oxidising the cell-derived ECM might contribute to functional changes in PHLF, a key mechanism behind the pathogenesis of inflammatory lung diseases.
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Affiliation(s)
- Michael Papanicolaou
- Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, NSW 2007, Australia; (M.P.); (P.H.); (A.A.); (D.v.R.)
- Garvan Institute of Medical Research, Darlinghurst, NSW 2010, Australia
| | - Patrick He
- Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, NSW 2007, Australia; (M.P.); (P.H.); (A.A.); (D.v.R.)
- Woolcock Emphysema Centre, Woolcock Institute of Medical Research, University of Sydney, Sydney, NSW 2037, Australia
| | - Sandra Rutting
- Woolcock Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW 2037, Australia; (S.R.); (D.X.)
| | - Alaina Ammit
- Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, NSW 2007, Australia; (M.P.); (P.H.); (A.A.); (D.v.R.)
- Woolcock Emphysema Centre, Woolcock Institute of Medical Research, University of Sydney, Sydney, NSW 2037, Australia
| | - Dikaia Xenaki
- Woolcock Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW 2037, Australia; (S.R.); (D.X.)
| | - David van Reyk
- Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, NSW 2007, Australia; (M.P.); (P.H.); (A.A.); (D.v.R.)
- Woolcock Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW 2037, Australia; (S.R.); (D.X.)
| | - Brian G. Oliver
- Faculty of Science, School of Life Sciences, University of Technology Sydney, Sydney, NSW 2007, Australia; (M.P.); (P.H.); (A.A.); (D.v.R.)
- Woolcock Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW 2037, Australia; (S.R.); (D.X.)
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24
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Rosenfeld MA, Wasserman LA, Vasilyeva AD, Podoplelova NA, Panteleev MA, Yurina LV. Hypochlorite-induced oxidation of fibrinogen: Effects on its thermal denaturation and fibrin structure. Biochim Biophys Acta Gen Subj 2021; 1865:129970. [PMID: 34339807 DOI: 10.1016/j.bbagen.2021.129970] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 06/17/2021] [Accepted: 07/25/2021] [Indexed: 12/23/2022]
Abstract
BACKGROUND Human fibrinogen, which plays a key role in plasma haemostasis, is a highly vulnerable target for oxidants. Fibrinogen undergoes posttranslational modifications that can potentially disrupt protein structure and function. METHODS For the first time, by differential scanning calorimetry, dynamic and elastic light scattering and confocal laser scanning microscopy, the consequences of HOCl/-OCl-induced oxidation of fibrinogen on its thermal denaturation, molecular size distribution and fibrin clot network have been explored. RESULTS Within a wide range of HOCl/-OCl concentrations (50-300 μM), the molecular size distribution remained unimodal; however, the average size of the hydrated molecules decreased. HOCl/-OCl-induced oxidation of fibrinogen resulted in the diminished thermal stability of regions D and E. As evidenced by elastic light scattering and confocal laser scanning microscopy, HOCl/-OCl caused the formation of abnormal fibrin with a decreased diameter of individual fibres. CONCLUSIONS The current results along with data from previous studies enable one to conclude that the effect of HOCl/-OCl-mediated oxidation on the thermal stability of region D is influenced directly by oxidative damage to the D region structure. Since the E region is not subjected to oxidative modification, its structural damage is likely to be mediated by the oxidation of other protein structures, in particular α-helical coiled-coils. GENERAL SIGNIFICANCE The experimental findings acquired in the current study could help to elucidate the consequences of oxidative stress in vivo on damage to the structure of fibrinogen/fibrin under the action of different ROS species.
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Affiliation(s)
- Mark A Rosenfeld
- N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334 Moscow, Russia.
| | - Lyubov A Wasserman
- N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334 Moscow, Russia
| | - Alexandra D Vasilyeva
- N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334 Moscow, Russia
| | - Nadezhda A Podoplelova
- Center for Theoretical Problems of Physicochemical Pharmacology, 119991 Moscow, Russia; Federal Research and Clinical Center of Pediatric Hematology, Oncology, and Immunology, 117198 Moscow, Russia
| | - Mikhail A Panteleev
- Center for Theoretical Problems of Physicochemical Pharmacology, 119991 Moscow, Russia; Federal Research and Clinical Center of Pediatric Hematology, Oncology, and Immunology, 117198 Moscow, Russia
| | - Lyubov V Yurina
- N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334 Moscow, Russia
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Takeda Y, Matsuda S, Jamsransuren D, Ogawa H. Comparison of the SARS-CoV-2-inactivating activities of the differently manufactured hypochlorous acid water products with various pH. J Water Health 2021; 19:448-456. [PMID: 34152297 DOI: 10.2166/wh.2021.260] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The use of effective disinfectants is a key method of controlling the spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Hypochlorous acid water (HAW) has a broad spectrum of virucidal activities. We previously reported that acidic electrolyzed water, one of the HAW products, had potent SARS-CoV-2-inactivating activity and showed promise as a disinfectant. However, different manufacturing methods have produced several HAW products with various pH values. Here, we compared the SARS-CoV-2-inactivating activities of various HAW products. At sufficiently high volume and residual chlorine concentration (RCC), the HAW products inactivated SARS-CoV-2 efficiently regardless of pH or manufacturing method. However, although HAW products at pH 5.0-6.4 maintained high RCC and sustained virucidal activity for 21 days, the RCC rapidly decreased in HAW products at pH ≤ 3.0. Our results may guide in choosing appropriate HAW products for different usage situations.
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Affiliation(s)
- Yohei Takeda
- Research Center for Global Agromedicine, Obihiro University of Agriculture and Veterinary Medicine, 2-11 Inada, Obihiro, Hokkaido 080-8555, Japan
| | - Sachiko Matsuda
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, 2-11 Inada, Obihiro, Hokkaido 080-8555, Japan E-mail:
| | - Dulamjav Jamsransuren
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, 2-11 Inada, Obihiro, Hokkaido 080-8555, Japan E-mail:
| | - Haruko Ogawa
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, 2-11 Inada, Obihiro, Hokkaido 080-8555, Japan E-mail:
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Freund E, Miebach L, Stope MB, Bekeschus S. Hypochlorous acid selectively promotes toxicity and the expression of danger signals in human abdominal cancer cells. Oncol Rep 2021; 45:71. [PMID: 33760187 PMCID: PMC8020206 DOI: 10.3892/or.2021.8022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 01/18/2021] [Indexed: 12/26/2022] Open
Abstract
Tumors of the abdominal cavity, such as colorectal, pancreatic and ovarian cancer, frequently metastasize into the peritoneum. Large numbers of metastatic nodules hinder curative surgical resection, necessitating lavage with hyperthermic intraperitoneal chemotherapy (HIPEC). However, HIPEC not only causes severe side effects but also has limited therapeutic efficacy in various instances. At the same time, the age of immunotherapies such as biological agents, checkpoint‑ inhibitors or immune‑cell therapies, increasingly emphasizes the critical role of anticancer immunity in targeting malignancies. The present study investigated the ability of three types of long‑lived reactive species (oxidants) to inactivate cancer cells and potentially complement current HIPEC regimens, as well as to increase tumor cell expression of danger signals that stimulate innate immunity. The human abdominal cancer cell lines HT‑29, Panc‑01 and SK‑OV‑3 were exposed to different concentrations of hydrogen peroxide (H2O2), hypochlorous acid (HOCl) and peroxynitrite (ONOO‑). Metabolic activity was measured, as well as determination of cell death and danger signal expression levels via flow cytometry and detection of intracellular oxidation via high‑content microscopy. Oxidation of tumor decreased intracellular levels of the antioxidant glutathione and induced oxidation in mitochondria, accompanied by a decrease in metabolic activity and an increase in regulated cell death. At similar concentrations, HOCl showed the most potent effects. Non‑malignant HaCaT keratinocytes were less affected, suggesting the approach to be selective to some extent. Pro‑immunogenic danger molecules were investigated by assessing the expression levels of calreticulin (CRT), and heat‑shock protein (HSP)70 and HSP90. CRT expression was greatest following HOCl and ONOO‑ treatment, whereas HOCl and H2O2 resulted in the greatest increase in HSP70 and HSP90 expression levels. These results suggested that HOCl may be a promising agent to complement current HIPEC regimens targeting peritoneal carcinomatosis.
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Affiliation(s)
- Eric Freund
- Centre for Innovation Competence (ZIK) Plasmatis, Leibniz Institute for Plasma Science and Technology (INP Greifswald), D-17489 Greifswald, Germany
- Department of General, Visceral, Thoracic, and Vascular Surgery, Greifswald University Medical Center, D-17475 Greifswald, Germany
| | - Lea Miebach
- Centre for Innovation Competence (ZIK) Plasmatis, Leibniz Institute for Plasma Science and Technology (INP Greifswald), D-17489 Greifswald, Germany
- Department of General, Visceral, Thoracic, and Vascular Surgery, Greifswald University Medical Center, D-17475 Greifswald, Germany
| | - Matthias B. Stope
- Department of Gynecology and Gynecological Oncology, Bonn University Medical Center, D-53217 Bonn, Germany
| | - Sander Bekeschus
- Centre for Innovation Competence (ZIK) Plasmatis, Leibniz Institute for Plasma Science and Technology (INP Greifswald), D-17489 Greifswald, Germany
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Königstorfer A, Ashby LV, Bollar GE, Billiot CE, Gray MJ, Jakob U, Hampton MB, Winterbourn CC. Induction of the reactive chlorine-responsive transcription factor RclR in Escherichia coli following ingestion by neutrophils. Pathog Dis 2021; 79:ftaa079. [PMID: 33351093 PMCID: PMC7797021 DOI: 10.1093/femspd/ftaa079] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 12/18/2020] [Indexed: 01/16/2023] Open
Abstract
Neutrophils generate hypochlorous acid (HOCl) and related reactive chlorine species as part of their defence against invading microorganisms. In isolation, bacteria respond to reactive chlorine species by upregulating responses that provide defence against oxidative challenge. Key questions are whether these responses are induced when bacteria are phagocytosed by neutrophils, and whether this provides them with a survival advantage. We investigated RclR, a transcriptional activator of the rclABC operon in Escherichia coli that has been shown to be specifically activated by reactive chlorine species. We first measured induction by individual reactive chlorine species, and showed that HOCl itself activates the response, as do chloramines (products of HOCl reacting with amines) provided they are cell permeable. Strong RclR activation was seen in E. coli following phagocytosis by neutrophils, beginning within 5 min and persisting for 40 min. RclR activation was suppressed by inhibitors of NOX2 and myeloperoxidase, providing strong evidence that it was due to HOCl production in the phagosome. RclR activation demonstrates that HOCl, or a derived chloramine, enters phagocytosed bacteria in sufficient amount to induce this response. Although RclR was induced in wild-type bacteria following phagocytosis, we detected no greater sensitivity to neutrophil killing of mutants lacking genes in the rclABC operon.
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Affiliation(s)
- Andreas Königstorfer
- Department of Pathology and Biomedical Science, Centre for Free Radical Research, University of Otago Christchurch, 2 Riccarton Ave, Christchurch 8011, New Zealand
| | - Louisa V Ashby
- Department of Pathology and Biomedical Science, Centre for Free Radical Research, University of Otago Christchurch, 2 Riccarton Ave, Christchurch 8011, New Zealand
| | - Gretchen E Bollar
- Department of Microbiology, School of Medicine, University of Alabama at Birmingham, 845 19th St, Birmingham AL 35294, United States
| | - Caitlin E Billiot
- Department of Microbiology, School of Medicine, University of Alabama at Birmingham, 845 19th St, Birmingham AL 35294, United States
| | - Michael J Gray
- Department of Microbiology, School of Medicine, University of Alabama at Birmingham, 845 19th St, Birmingham AL 35294, United States
| | - Ursula Jakob
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, 1105 N-University, Ann Arbor MI 48109-1085, United States
| | - Mark B Hampton
- Department of Pathology and Biomedical Science, Centre for Free Radical Research, University of Otago Christchurch, 2 Riccarton Ave, Christchurch 8011, New Zealand
| | - Christine C Winterbourn
- Department of Pathology and Biomedical Science, Centre for Free Radical Research, University of Otago Christchurch, 2 Riccarton Ave, Christchurch 8011, New Zealand
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Cabezas CE, Laulié AM, Briones AC, Pardo-Esté C, Lorca DE, Cofré AA, Morales EH, Mora AY, Krüger GI, Bueno SM, Hidalgo AA, Saavedra CP. Activation of regulator ArcA in the presence of hypochlorite in Salmonella enterica serovar Typhimurium. Biochimie 2020; 180:178-185. [PMID: 33188860 DOI: 10.1016/j.biochi.2020.11.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 11/04/2020] [Accepted: 11/05/2020] [Indexed: 01/24/2023]
Abstract
Oxidative stress is the main mechanism behind efficient disinfectants, causing damage in bacterial macromolecules. Importantly, bacteria activate resistance mechanisms in response to damage generated by oxidative stress. Strategies allowing pathogens to survive oxidative stress are highly conserved among microorganisms. Many of these strategies entail genomic responses triggered by signals transduced through Two Component Systems (TCS). Recently, we demonstrated that the TCS ArcAB (specifically ArcA) participates in bacterial responses to hypochlorite, regulating the uptake of this toxic compound and being involved in resistance and survival inside neutrophils, where hypochlorous acid abounds. Here, we demonstrated that ArcA is required in the response to oxidative stress generated by hypochlorite, independent of its cognate sensor ArcB or the Asp54 of ArcA, the only phosphorylable residue in ArcA, which is required to function as a gene regulator. Our results suggest that ArcA could have additional functions to respond to oxidative stress, independent of its regulatory activity, which might require interaction with other unknown relevant proteins.
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Affiliation(s)
- Carolina E Cabezas
- Laboratorio de Microbiología Molecular, Millennium Institute on Immunology and Immunotherapy, Departamento de Ciencias de la Vida, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Arlette M Laulié
- Laboratorio de Microbiología Molecular, Millennium Institute on Immunology and Immunotherapy, Departamento de Ciencias de la Vida, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Alan C Briones
- Laboratorio de Microbiología Molecular, Millennium Institute on Immunology and Immunotherapy, Departamento de Ciencias de la Vida, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Coral Pardo-Esté
- Laboratorio de Microbiología Molecular, Millennium Institute on Immunology and Immunotherapy, Departamento de Ciencias de la Vida, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Diego E Lorca
- Laboratorio de Microbiología Molecular, Millennium Institute on Immunology and Immunotherapy, Departamento de Ciencias de la Vida, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Agustin A Cofré
- Laboratorio de Microbiología Molecular, Millennium Institute on Immunology and Immunotherapy, Departamento de Ciencias de la Vida, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | | | - Aracely Y Mora
- Laboratorio de patogénesis molecular y antimicrobianos y Escuela de Química y Farmacia, Universidad Andres Bello, Santiago, Chile
| | - Gabriel I Krüger
- Laboratorio de Microbiología Molecular, Millennium Institute on Immunology and Immunotherapy, Departamento de Ciencias de la Vida, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Susan M Bueno
- Millennium Institute on Immunology and Immunotherapy, Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Alejandr A Hidalgo
- Laboratorio de patogénesis molecular y antimicrobianos y Escuela de Química y Farmacia, Universidad Andres Bello, Santiago, Chile
| | - Claudia P Saavedra
- Laboratorio de Microbiología Molecular, Millennium Institute on Immunology and Immunotherapy, Departamento de Ciencias de la Vida, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile.
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Wu M, Wu W, Duan Y, Liu X, Wang M, Phan CU, Qi G, Tang G, Liu B. HClO-Activated Fluorescence and Photosensitization from an AIE Nanoprobe for Image-Guided Bacterial Ablation in Phagocytes. Adv Mater 2020; 32:e2005222. [PMID: 33079417 DOI: 10.1002/adma.202005222] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/06/2020] [Indexed: 06/11/2023]
Abstract
Bacteria hiding in host phagocytes are difficult to kill, which can cause phagocyte disorders resulting in local and systemic tissue damage. Effective accumulation of activatable photosensitizers (PSs) in phagocytes to realize selective imaging and on-demand photodynamic ablation of bacteria is of great scientific and practical interests for precise bacteria diagnosis and treatment. Herein, HClO-activatable theranostic nanoprobes, DTF-FFP NPs, for image-guided bacterial ablation in phagocytes are introduced. DTF-FFP NPs are prepared by nanoprecipitation of an HClO-responsive near-infrared molecule FFP and an efficient PS DTF with aggregation-induced emission characteristic using an amphiphilic polymer Pluronic F127 as the encapsulation matrix. As an energy acceptor, FFP can quench both fluorescence and production of reactive oxygen species (ROS) of DTF, thus eliminating the phototoxicity of DTF-FFP NPs in normal cells and tissues. Once delivered to the infection sites, DTF-FFP NPs light up with red fluorescence and efficiently generate ROS owing to the degradation of FFP by the stimulated release of HClO in phagocytes. The selective activation of fluorescence and photosensitization is successfully confirmed by both in vitro and in vivo results, demonstrating the effectiveness and theranostic potential of DTF-FFP NPs in precise bacterial therapy.
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Affiliation(s)
- Min Wu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Wenbo Wu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Yukun Duan
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Xingang Liu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Meng Wang
- Department of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, P. R. China
| | - Chi Uyen Phan
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, P. R. China
| | - Guobin Qi
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Guping Tang
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, P. R. China
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, 350207, P. R. China
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Guo C, Davies MJ, Hawkins CL. Role of thiocyanate in the modulation of myeloperoxidase-derived oxidant induced damage to macrophages. Redox Biol 2020; 36:101666. [PMID: 32781424 PMCID: PMC7417949 DOI: 10.1016/j.redox.2020.101666] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/20/2020] [Accepted: 07/28/2020] [Indexed: 12/13/2022] Open
Abstract
Myeloperoxidase (MPO) is a vital component of the innate immune system, which produces the potent oxidant hypochlorous acid (HOCl) to kill invading pathogens. However, an overproduction of HOCl during chronic inflammatory conditions causes damage to host cells, which promotes disease, including atherosclerosis. As such, there is increasing interest in the use of thiocyanate (SCN-) therapeutically to decrease inflammatory disease, as SCN- is the favoured substrate for MPO, and a potent competitive inhibitor of HOCl formation. Use of SCN- by MPO forms hypothiocyanous acid (HOSCN), which can be less damaging to mammalian cells. In this study, we examined the ability of SCN- to modulate damage to macrophages induced by HOCl, which is relevant to lesion formation in atherosclerosis. Addition of SCN- prevented HOCl-mediated cell death, altered the extent and nature of thiol oxidation and the phosphorylation of mitogen activated protein kinases. These changes were dependent on the concentration of SCN- and were observed in some cases, at a sub-stoichiometric ratio of SCN-: HOCl. Co-treatment with SCN- also modulated HOCl-induced perturbations in the expression of various antioxidant and inflammatory genes. In general, the data reflect the conversion of HOCl to HOSCN, which can induce reversible modifications that are repairable by cells. However, our data also highlight the ability of HOSCN to increase pro-inflammatory gene expression and cytokine/chemokine release, which may be relevant to the use of SCN- therapeutically in atherosclerosis. Overall, this study provides further insight into the cellular pathways by which SCN- could exert protective effects on supplementation to decrease the development of chronic inflammatory diseases, such as atherosclerosis.
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Affiliation(s)
- Chaorui Guo
- Department of Biomedical Sciences, University of Copenhagen, Panum, Blegdamsvej 3B, Copenhagen, DK-2200, Denmark
| | - Michael J Davies
- Department of Biomedical Sciences, University of Copenhagen, Panum, Blegdamsvej 3B, Copenhagen, DK-2200, Denmark
| | - Clare L Hawkins
- Department of Biomedical Sciences, University of Copenhagen, Panum, Blegdamsvej 3B, Copenhagen, DK-2200, Denmark.
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Stoffel JJ, Kohler Riedi PL, Hadj Romdhane B. A multimodel regime for evaluating effectiveness of antimicrobial wound care products in microbial biofilms. Wound Repair Regen 2020; 28:438-447. [PMID: 32175636 PMCID: PMC7540695 DOI: 10.1111/wrr.12806] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 02/20/2020] [Accepted: 03/10/2020] [Indexed: 01/04/2023]
Abstract
Microbial biofilms have become increasingly recognized as a cause of wound chronicity. There are several topical antimicrobial wound care products available for use; however, their effectiveness has routinely been demonstrated with planktonic microorganisms. There is no target reference value for antimicrobial effectiveness of wound care products in biofilm models. In addition, data on antimicrobial activity of products in biofilm models are scattered across many test methods in a variety of studies. The aim of this work is to directly compare commercial products containing the commonly used topical antimicrobial agents iodine, silver, polyhexamethylene biguanide, octenidine, hypochlorous acid, benzalkonium chloride, and a surfactant-based topical containing poloxamer 188. Five different in vitro biofilm models of varied complexity were used, incorporating several bacterial pathogens such as Staphylococcus, Enterococcus, Streptococcus, Pseudomonas, Acinetobacter, Klebsiella, and Enterobacter. The fungal pathogens Candida albicans and Candida auris were also evaluated. A multispecies bacterial biofilm model was also used to evaluate the products. Additionally, C. albicans was used in combination with S. aureus and P. aeruginosa in a multikingdom version of the polymicrobial biofilm model. Statistically significant differences in antimicrobial performance were observed between treatments in each model and changing microbial growth conditions or combinations of organisms resulted in significant performance differences for some treatments. The iodine and benzalkonium chloride-containing products were overall the most effective in vitro and were then selected for in vivo evaluation in an infected immunocompromised murine model. Unexpectedly, the iodine product was statistically (P > .05) no different than the untreated control, while the benzalkonium chloride containing product significantly (P < .05) reduced the biofilm compared to untreated control. This body of work demonstrates the importance of not only evaluating antimicrobial wound care products in biofilm models but also the importance of using several different models to gain a comprehensive understanding of products' effectiveness.
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Sciubba F, Spagnoli M, Iavicoli S, Asaro G, De Luca A, Guglielmi G, Delfini M. Efficacy of sodium hypochlorite in the degradation antineoplastic drugs by NMR spectroscopy. G Ital Med Lav Ergon 2020; 42:109-120. [PMID: 32614541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 06/30/2020] [Indexed: 06/11/2023]
Abstract
Antineoplastic drugs are used to treat cancer, having their therapeutic effect by inhibiting the cell division process. Although cancer cells, due to their rapid growth, are more sensitive to the toxic effects of chemotherapeutic agents, healthy cells and tissues may also be damaged. Many studies show acute and chronic toxicity both in patients treated with chemotherapy and in exposed workers. In fact, exposure to these substances can also be linked to the formation of different types of secondary tumors. The International Agency on Research on Cancer (IARC) included some antineplastic drugs in Group 1 (carcinogenic to humans), in Group 2A (probable carcinogens for In recent years, many studies have evidenced the presence of antineoplastic drug contamination on work surfaces, materials and floors and based on these observations, international and national guidelines have been published to limit occupational exposure, with particular attention to procedures post-preparation of chemotherapy to limit as much as possible the accumulation of contaminated residues. The aim of the following study is to determine the effectiveness of the degradation of four antineoplastic drugs: 5-fluorouracil, azacitidine, cytarabine and irinotecan using a low concentration of sodium hypochlorite solution (0.115%). The analytical platform used to monitor the degradation course of the substances under examination was hydrogen nuclear magnetic spectroscopy (1H NMR). In the same experimental conditions the effectiveness of the degradation of the same antineoplastic drugs with a 99.9% ethanol solution was also evaluated. The study showed that the best degradation efficiency (> 90% ) is obtained with the hypochlorite solution after 15 minutes.
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Affiliation(s)
- Fabio Sciubba
- University of Rome La Sapienza - Department of Chemistry (S. Cannizzaro Building), Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Mariangela Spagnoli
- INAIL - Italian Workers Compensation Authority - Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Via di Fontana Candida 1, 00078 Monte Porzio Catone, Rome, Italy
| | - Sergio Iavicoli
- INAIL - Italian Workers Compensation Authority - Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Via di Fontana Candida 1, 00078 Monte Porzio Catone, Rome, Italy
| | - Gaia Asaro
- A.R.N.A.S. Ospedali Civico Di Cristina Benfratelli - Farmacia Ospedaliera, Piazza Nicola Leotta 4, 90127 Palermo, Italy
| | - Alessio De Luca
- Fondazione Policlinico Universitario Agostino Gemelli - Farmacia Interna, Largo Agostino Gemelli 8, 00168 Rome, Italy
| | - Gaspare Guglielmi
- A.O.R.N. Antonio Cardarelli - U.O.C. Farmacia Ospedaliera, Via Antonio Cardarelli 9, 80131 Napoli, Italy
| | - Maurizio Delfini
- University of Rome La Sapienza - Department of Chemistry (S. Cannizzaro Building), Piazzale Aldo Moro 5, 00185 Rome, Italy
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Thangavel T, Scott J, Jones S, Gugalothu R, Wilson C. Effect of physio-chemical seed treatments on opium poppy downy mildews caused by Peronospora meconopsidis and P. somniferi. PLoS One 2020; 15:e0230801. [PMID: 32275719 PMCID: PMC7147767 DOI: 10.1371/journal.pone.0230801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 03/09/2020] [Indexed: 11/19/2022] Open
Abstract
Downy mildew of opium poppy is the single biggest disease constraint afflicting the Australian poppy industry. Within the pathosystem, the transmission of infections via infested seed is of major concern. Both downy mildew pathogens of poppy; Peronospora meconopsidis and P. somniferi, are known contaminants of commercial seed stocks. Using seed naturally infested with these pathogens, the effect of physio-chemical seed treatments on seedling health and disease transmission were evaluated. Individual seed treatments were tested to determine optimal treatment parameters for each; including incubation time, temperature and treatment concentration. Optimised physiochemical treatments were then compared. The most effective treatment methods were seed washes in acidified electrolytic water (400 ppm hypochlorous acid for 5 min) and hypochlorite solution (2% NaOCI for 5 min). In seed to seedling transmission assays, these two treatments reduced transmission of P. somniferi by 88.8% and 74.61%, and P. meconopsidis by 93.3% and 100%, respectively. These methods are recommended for seed treatment of commercial opium poppy seed to assist in the control of the downy mildew diseases.
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Affiliation(s)
- Tamilarasan Thangavel
- Research Laboratories, Tasmanian Institute of Agriculture (TIA), University of Tasmania (UTAS), New Town Australia
| | | | | | - Ramya Gugalothu
- Research Laboratories, Tasmanian Institute of Agriculture (TIA), University of Tasmania (UTAS), New Town Australia
| | - Calum Wilson
- Research Laboratories, Tasmanian Institute of Agriculture (TIA), University of Tasmania (UTAS), New Town Australia
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Apoorva S, Behera P, Sajjanar B, Mahawar M. Identification of oxidant susceptible proteins in Salmonella Typhimurium. Mol Biol Rep 2020; 47:2231-2242. [PMID: 32076998 DOI: 10.1007/s11033-020-05328-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 02/13/2020] [Indexed: 11/26/2022]
Abstract
The human gut pathogen, Salmonella Typhimurium (S. Typhimurium) not only survives but also replicates inside the phagocytic cells. Bacterial proteins are the primary targets of phagocyte generated oxidants. Because of the different amino acid composition, some proteins are more prone to oxidation than others. Many oxidant induced modifications to amino acids have been described. Introduction of carbonyl group is one of such modifications, which takes place quite early following exposure of proteins to oxidants and is quite stable. Therefore, carbonyl groups can be exploited to identify oxidant susceptible proteins. Hypochlorous acid (HOCl) is one of the most potent oxidants produced by phagocytes. Incubation of S. Typhimurium with 3 mM HOCl resulted in more than 150 folds loss of bacterial viability. Proteins extracted from HOCl exposed S. Typhimurium cells showed about 60 folds (p < 0.001) more carbonyl levels as compared to unexposed cells. Similarly, 2, 4-Dinitrophenylhydrazine (2, 4-DNPH) derivatized proteins of HOCl treated S. Typhimurium cultures reacted strongly with anti-DNP antibodies as compared to buffer treated counterpart. Next, we have derivatized carbonyl groups on the proteins with biotin hydrazide. The derivatized proteins were then isolated by avidin affinity chromatography. Mass spectrometry based analysis revealed the presence of 204 proteins.
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Affiliation(s)
- Shekhar Apoorva
- Division of Biochemistry, Indian Veterinary Research Institute, Izatnagar, Bareilly, U.P., 243122, India
| | - Pranatee Behera
- Division of Biochemistry, Indian Veterinary Research Institute, Izatnagar, Bareilly, U.P., 243122, India
| | - Basavaraj Sajjanar
- Division of Biotechnology, Indian Veterinary Research Institute, Izatnagar, Bareilly, U.P., 243122, India
| | - Manish Mahawar
- Division of Biochemistry, Indian Veterinary Research Institute, Izatnagar, Bareilly, U.P., 243122, India.
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Kumorkiewicz-Jamro A, Starzak K, Sutor K, Nemzer B, Pietrzkowski Z, Popenda Ł, Wybraniec S. Structural Study on Hypochlorous Acid-Mediated Chlorination of Betanin and Its Decarboxylated Derivatives from an Anti-Inflammatory Beta vulgaris L. Extract. Molecules 2020; 25:E378. [PMID: 31963358 PMCID: PMC7024289 DOI: 10.3390/molecules25020378] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 01/10/2020] [Accepted: 01/14/2020] [Indexed: 11/18/2022] Open
Abstract
Hypochlorous acid (HOCl) produced by neutrophils is a part of the natural innate immune response system in the human body, but excessive levels of HOCl can ultimately be detrimental to health. Recent reports suggest that betacyanin plant pigments can act as potent scavengers of inflammatory factors and are notably effective against HOCl. In this contribution, chlorination mechanism and position of the electrophilic substitution in betacyanins was studied by high-resolution mass spectrometry and further structural analyses by NMR techniques, which completed the identification of the chlorinated betacyanins. For the study on the influence of the position of decarboxylation on the chlorination mechanism, a comparison of the chlorination position between betanin as well as 17-, and 2,17-decarboxylated betanins was performed. The structural study confirmed that the chlorination position in betanin occurs within the dihydropyridinic moiety at carbon C-18. Therefore, out of the aqueous free chlorine equilibrium species: HOCl, OCl-, Cl2, and Cl2O, the most potent chlorinating agents are HOCl and Cl2O postulated previously and the attack of the Cl⁺ ion on the carbon C-18 with a cyclic intermediate version is considered.
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Affiliation(s)
- Agnieszka Kumorkiewicz-Jamro
- Department of Analytical Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, Poland; (A.K.-J.); (K.S.); (K.S.)
| | - Karolina Starzak
- Department of Analytical Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, Poland; (A.K.-J.); (K.S.); (K.S.)
| | - Katarzyna Sutor
- Department of Analytical Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, Poland; (A.K.-J.); (K.S.); (K.S.)
| | - Boris Nemzer
- Chemistry Research, VDF FutureCeuticals, Inc., Momence, IL 60954, USA;
- Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | | | - Łukasz Popenda
- NanoBioMedical Centre, Adam Mickiewicz University in Poznan, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland;
| | - Sławomir Wybraniec
- Department of Analytical Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, Poland; (A.K.-J.); (K.S.); (K.S.)
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Kim C, Her Y, Kim Y, Jung C, Lim H, Suh K. Evaluating the effectiveness of HOCl application on odor reduction and earthworm population growth during vermicomposting of food waste employing Eisenia fetida. PLoS One 2019; 14:e0226229. [PMID: 31856257 PMCID: PMC6922465 DOI: 10.1371/journal.pone.0226229] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 11/21/2019] [Indexed: 11/30/2022] Open
Abstract
Vermicomposting has been recommended as an eco-friendly method to transform organic waste into nutrient resources with minimum energy input. However, odor and pest issues associated with this method limit the use of vermicomposting, especially in indoor conditions. This study evaluated the effectiveness of applying hypochlorous acid (HOCl) to deodorize the vermicomposting process and improve the breeding environment for earthworms (Eisenia fetida). The deodorization performance of HOCl was compared by measuring the amount of ammonia (NH3) and amine (R-NH2) released from the decaying process of two types of food waste: HOCl-treated (HTW) waste and non-treated waste (NTW). The total and individual weights of earthworms in the waste treated with HOCl was measured to evaluate the impact on earthworm reproduction after applying HOCl. The results showed that HOCl application could reduce NH3 by 40% and R-NH2 by 80%, and increase the earthworm population size and total weight by up to 29% and 92%, respectively, compared to the control group. These results suggest that HOCl application is potentially an efficient method to control the odor and to boost earthworm reproduction and thus facilitate vermicomposting for improved food waste treatment and environmental quality.
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Affiliation(s)
- Chanwoo Kim
- Graduate School of International Agricultural Technology, Seoul National University, Pyeonchang-gun, Gangwon, Republic of Korea
| | - Younggu Her
- Department of Agricultural and Biological Engineering, Tropical Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Homestead, Florida, United States of America
| | - Yooan Kim
- Graduate School of International Agricultural Technology, Seoul National University, Pyeonchang-gun, Gangwon, Republic of Korea
| | - Chanhoon Jung
- Interdisciplinary Program in Agricultural and Forest Meteorology, Seoul National University, Seoul, Republic of Korea
| | - Hangkyo Lim
- Department of Biology, Notre Dame of Maryland University, Baltimore, Maryland, United States of America
| | - Kyo Suh
- Graduate School of International Agricultural Technology, Seoul National University, Pyeonchang-gun, Gangwon, Republic of Korea
- Institute of Green Bio Science & Technology, Seoul National University, Gangwon, Republic of Korea
- * E-mail:
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Cialfi S, Calabro S, Franchitto M, Zonfrilli A, Screpanti I, Talora C. Hypotonic, Acidic Oxidizing Solution Containing Hypochlorous Acid (HClO) as a Potential Treatment of Hailey-Hailey Disease. Molecules 2019; 24:molecules24244427. [PMID: 31817098 PMCID: PMC6943548 DOI: 10.3390/molecules24244427] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 11/29/2019] [Accepted: 12/02/2019] [Indexed: 11/25/2022] Open
Abstract
Hailey–Hailey disease (HHD) is a rare, chronic and recurrent blistering disorder, characterized by erosions occurring primarily in intertriginous regions and histologically by suprabasal acantholysis. Mutation of the Golgi Ca2+-ATPase ATP2C1 has been identified as having a causative role in Hailey–Hailey disease. HHD-derived keratinocytes have increased oxidative-stress that is associated with impaired proliferation and differentiation. Additionally, HHD is characterized by skin lesions that do not heal and by recurrent skin infections, indicating that HHD keratinocytes might not respond well to challenges such as wounding or infection. Hypochlorous acid has been demonstrated in vitro and in vivo to possess properties that rescue both oxidative stress and altered wound repair process. Thus, we investigated the potential effects of a stabilized form of hypochlorous acid (APR-TD012) in an in vitro model of HHD. We found that treatment of ATP2C1-defective keratinocytes with APR-TD012 contributed to upregulation of Nrf2 (nuclear factor (erythroid-derived 2)-like 2). Additionally, APR TD012-treatment restored the defective proliferative capability of siATP2C1-treated keratinocytes. We also found that the APR-TD012 treatment might support wound healing process, due to its ability to modulate the expression of wound healing associated cytokines. These observations suggested that the APR-TD012 might be a potential therapeutic agent for HHD-lesions.
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Affiliation(s)
- Samantha Cialfi
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy (M.F.); (A.Z.); (I.S.)
- Correspondence: (S.C.); (C.T.)
| | - Salvatore Calabro
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy (M.F.); (A.Z.); (I.S.)
| | - Matteo Franchitto
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy (M.F.); (A.Z.); (I.S.)
| | - Azzurra Zonfrilli
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy (M.F.); (A.Z.); (I.S.)
- Center of Life Nano Science Sapienza, Istituto Italiano di Tecnologia, 00161 Rome, Italy
| | - Isabella Screpanti
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy (M.F.); (A.Z.); (I.S.)
| | - Claudio Talora
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy (M.F.); (A.Z.); (I.S.)
- Correspondence: (S.C.); (C.T.)
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Misztal T, Golaszewska A, Tomasiak-Lozowska MM, Iwanicka M, Marcinczyk N, Leszczynska A, Chabielska E, Rusak T. The myeloperoxidase product, hypochlorous acid, reduces thrombus formation under flow and attenuates clot retraction and fibrinolysis in human blood. Free Radic Biol Med 2019; 141:426-437. [PMID: 31279970 DOI: 10.1016/j.freeradbiomed.2019.07.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 05/24/2019] [Accepted: 07/03/2019] [Indexed: 10/26/2022]
Abstract
Hypochlorite (HOCl), a strong oxidant and antimicrobial agent, has been proposed to be associated with hemostatic abnormalities during inflammatory response. However, its complex impact on hemostasis is not completely understood. In this report we studied the effect of clinically relevant (micromolar) HOCl concentrations on thrombus formation under flow, kinetics of platelet-fibrin clot formation, its architecture, retraction, and lysis. We found that HOCl (up to 500 µM) did not affect kinetics of coagulation measured in whole blood. HOCl (500-1000 µM) markedly diminished thrombus formation under flow. Clot retraction rate was reduced by HOCl dose-dependently (50-500 µM). HOCl (125-500 µM) inhibited fibrinolysis in whole blood and in platelet-depleted plasma, dose-dependently. Activity of plasmin was reduced by HOCl at concentrations started from 500 µM. HOCl (up to 500 µM) did not reduce plasminogen binding to fibrin under flow. HOCl (125-500 µM) modulated architecture of fibrin- and platelet-fibrin clots towards structures made of thin and densely packed fibers. Exposure of pure fibrinogen to HOCl (10-1000 µM) resulted in formation of dityrosine and was associated with altered fibrin structure derived from such modified fibrinogen. HOCl-altered fibrin net structure was not related with modulation of platelet procoagulant response, thrombin generation, and factor XIII activity. We conclude that, in human blood, clinically relevant HOCl concentrations may inhibit thrombus formation under flow, clot retraction and fibrinolysis. Fibrinolysis and clot retraction seem to be the most sensitive to HOCl-evoked inhibition. HOCl-modified fibrinogen and altered clot structure associated with it are likely to be primary sources of attenuated fibrinolysis.
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Affiliation(s)
- Tomasz Misztal
- Department of Physical Chemistry, Medical University of Bialystok, Kilinskiego 1, 15-089, Bialystok, Poland.
| | - Agata Golaszewska
- Department of Physical Chemistry, Medical University of Bialystok, Kilinskiego 1, 15-089, Bialystok, Poland.
| | | | - Marta Iwanicka
- Department of Physical Chemistry, Medical University of Bialystok, Kilinskiego 1, 15-089, Bialystok, Poland.
| | - Natalia Marcinczyk
- Department of Biopharmacy, Medical University of Bialystok, Kilinskiego 1, 15-089, Bialystok, Poland.
| | - Agnieszka Leszczynska
- Department of Biopharmacy, Medical University of Bialystok, Kilinskiego 1, 15-089, Bialystok, Poland.
| | - Ewa Chabielska
- Department of Biopharmacy, Medical University of Bialystok, Kilinskiego 1, 15-089, Bialystok, Poland.
| | - Tomasz Rusak
- Department of Physical Chemistry, Medical University of Bialystok, Kilinskiego 1, 15-089, Bialystok, Poland.
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Zhang C, Zhang L, Wu W, Gao F, Li RQ, Song W, Zhuang ZN, Liu CJ, Zhang XZ. Artificial Super Neutrophils for Inflammation Targeting and HClO Generation against Tumors and Infections. Adv Mater 2019; 31:e1901179. [PMID: 30924234 DOI: 10.1002/adma.201901179] [Citation(s) in RCA: 103] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 03/13/2019] [Indexed: 05/22/2023]
Abstract
Neutrophils are powerful effector leukocytes that play an important role in innate immune systems for opposing tumor progression and ameliorating pathogen infections. Inspired by their distinct functions against tumors and infections, the artificial "super neutrophils" are proposed with excellent inflammation targeting and hypochlorous acid (HClO) generation characteristics for targeting and eliminating malignant tumor cells and pathogens. The "super neutrophils" are fabricated by embedding glucose oxidase (GOx) and chloroperoxidase (CPO) into zeolitic imidazolate framework-8 (ZIF-8) for HClO generation via enzymatic cascades, and then encapsulating them with the neutrophil membrane (NM) for inflammation targeting. In vitro and in vivo results indicate that these artificial "super neutrophils" can generate seven times higher reactive HClO than the natural neutrophils for eradicating tumors and infections. The "super neutrophils" demonstrated here with easy fabrication and good neutrophil-mimicking property exhibit great potential for biomedical applications.
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Affiliation(s)
- Chi Zhang
- Key Laboratory of Biomedical Polymers of Ministry of Education and Department of Chemistry, Wuhan University, Wuhan, 430072, P. R. China
| | - Lu Zhang
- Key Laboratory of Biomedical Polymers of Ministry of Education and Department of Chemistry, Wuhan University, Wuhan, 430072, P. R. China
| | - Wei Wu
- Key Laboratory of Biomedical Polymers of Ministry of Education and Department of Chemistry, Wuhan University, Wuhan, 430072, P. R. China
| | - Fan Gao
- Key Laboratory of Biomedical Polymers of Ministry of Education and Department of Chemistry, Wuhan University, Wuhan, 430072, P. R. China
| | - Run-Qing Li
- Key Laboratory of Biomedical Polymers of Ministry of Education and Department of Chemistry, Wuhan University, Wuhan, 430072, P. R. China
| | - Wen Song
- Key Laboratory of Biomedical Polymers of Ministry of Education and Department of Chemistry, Wuhan University, Wuhan, 430072, P. R. China
| | - Ze-Nan Zhuang
- Key Laboratory of Biomedical Polymers of Ministry of Education and Department of Chemistry, Wuhan University, Wuhan, 430072, P. R. China
| | - Chuan-Jun Liu
- Key Laboratory of Biomedical Polymers of Ministry of Education and Department of Chemistry, Wuhan University, Wuhan, 430072, P. R. China
| | - Xian-Zheng Zhang
- Key Laboratory of Biomedical Polymers of Ministry of Education and Department of Chemistry, Wuhan University, Wuhan, 430072, P. R. China
- The Institute for Advanced Studies, Wuhan University, Wuhan, 430072, P. R. China
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Cai H, Chuang CY, Vanichkitrungruang S, Hawkins CL, Davies MJ. Hypochlorous acid-modified extracellular matrix contributes to the behavioral switching of human coronary artery smooth muscle cells. Free Radic Biol Med 2019; 134:516-526. [PMID: 30716431 DOI: 10.1016/j.freeradbiomed.2019.01.044] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 01/28/2019] [Accepted: 01/30/2019] [Indexed: 01/10/2023]
Abstract
The extracellular matrix (ECM) influences the structure and function of the arterial wall and modulates the behavior of vascular cells through ECM-cell interactions. Alterations to the ECM have been implicated in multiple pathological processes, including atherosclerosis which is characterized by low-grade chronic inflammation and the infiltration and proliferation of smooth muscle cells during disease development. Considerable evidence has been presented for a role for inflammation-derived oxidation in atherogenesis, with enzymatically-active myeloperoxidase (MPO), elevated levels of 3-chlorotyrosine (a biomarker of MPO-catalyzed damage) and oxidized ECM materials detected in advanced human atherosclerotic lesions. Whether oxidant-modified ECM contributes to the altered behavior of smooth muscle cells is however unclear. This study therefore investigated the effects of hypochlorous acid (HOCl), a major MPO-derived oxidant, on the structure of the native ECM synthesized by human coronary artery smooth muscle cells (HCAMSCs) and whether modified ECM proteins affected HCASMC adhesion, proliferation and gene expression. Exposure of native HCASMC-derived ECM to reagent HOCl or a MPO-Cl--H2O2 system resulted in extensive ECM modifications as evidenced by the loss of antibody recognition of epitopes on type IV collagen, laminin, versican and fibronectin. Oxidation of HCASMC ECM markedly reduced HCASMC adhesion to matrix components, but facilitated subsequent proliferation in vitro. Multiple genes were upregulated in HCASMCs in response to HOCl-modified HCASMC-ECM including interleukin-6 (IL-6), fibronectin (FN1) and matrix-metalloproteinases (MMPs). These data reveal a mechanism through which inflammation-induced ECM-modification may contribute to the behavioral switching of HCASMCs, a key process in plaque formation during the development of atherosclerosis.
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Affiliation(s)
- Huan Cai
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Christine Y Chuang
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Siriluck Vanichkitrungruang
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark; The Heart Research Institute, Sydney, Australia; Faculty of Medicine, University of Sydney, Sydney, Australia
| | - Clare L Hawkins
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Michael J Davies
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark; The Heart Research Institute, Sydney, Australia; Faculty of Medicine, University of Sydney, Sydney, Australia.
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Rayner BS, Zhang Y, Brown BE, Reyes L, Cogger VC, Hawkins CL. Role of hypochlorous acid (HOCl) and other inflammatory mediators in the induction of macrophage extracellular trap formation. Free Radic Biol Med 2018; 129:25-34. [PMID: 30189264 DOI: 10.1016/j.freeradbiomed.2018.09.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 08/28/2018] [Accepted: 09/01/2018] [Indexed: 12/23/2022]
Abstract
The infiltration of activated leukocytes, including macrophages, at sites of inflammation and the formation and presence of hypochlorous acid (HOCl) are interlinked hallmarks of many debilitating disease processes, including atherosclerosis, arthritis, neurological and renal disease, diabetes and obesity. The production of extracellular traps by activated leukocytes in response to a range of inflammatory stimuli is increasingly recognised as an important process within a range of disease settings. We show that exposure of human monocyte-derived macrophages to pathophysiological levels of HOCl results in the dose-dependent extrusion of DNA and histones into the cellular supernatant, consistent with extracellular trap formation. Concurrent with, but independent of these findings, macrophage exposure to HOCl also resulted in an immediate and sustained cytosolic accumulation of Ca2+, culminating in the increased production of cytokines and chemokines. Polarisation of the macrophages prior to HOCl exposure revealed a greater propensity for inflammatory M1 macrophages to produce extracellular traps, whereas alternatively-activated M2 macrophages were less susceptible to HOCl insult. M1 macrophages also produced extracellular traps on exposure to phorbol myristate acetate (PMA), interleukin-8 (IL-8) and tumour necrosis factor α (TNFα). Taken together, these data indicate a potential role for macrophages in mediating extracellular trap formation, which may be relevant in pathological conditions characterised by chronic inflammation or excessive HOCl formation.
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Affiliation(s)
- Benjamin S Rayner
- Heart Research Institute, 7 Eliza Street, Newtown, NSW 2042, Australia; Sydney Medical School, University of Sydney, NSW 2006, Australia
| | - Yunjia Zhang
- Heart Research Institute, 7 Eliza Street, Newtown, NSW 2042, Australia; Sydney Medical School, University of Sydney, NSW 2006, Australia
| | - Bronwyn E Brown
- Heart Research Institute, 7 Eliza Street, Newtown, NSW 2042, Australia; Sydney Medical School, University of Sydney, NSW 2006, Australia
| | - Leila Reyes
- Heart Research Institute, 7 Eliza Street, Newtown, NSW 2042, Australia; Sydney Medical School, University of Sydney, NSW 2006, Australia
| | - Victoria C Cogger
- Sydney Medical School, University of Sydney, NSW 2006, Australia; ANZAC Research Institute, Concord Repatriation General Hospital, Concord, NSW 2139, Australia
| | - Clare L Hawkins
- Heart Research Institute, 7 Eliza Street, Newtown, NSW 2042, Australia; Sydney Medical School, University of Sydney, NSW 2006, Australia; Department of Biomedical Sciences, University of Copenhagen, Panum Institute, Blegdamsvej 3, Copenhagen N DK-2200, Denmark.
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Siani H, Wesgate R, Maillard JY. Impact of antimicrobial wipes compared with hypochlorite solution on environmental surface contamination in a health care setting: A double-crossover study. Am J Infect Control 2018; 46:1180-1187. [PMID: 29759641 DOI: 10.1016/j.ajic.2018.03.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 03/27/2018] [Accepted: 03/27/2018] [Indexed: 01/01/2023]
Abstract
OBJECTIVE Antimicrobial wipes are increasingly used in health care settings. This study evaluates, in a clinical setting, the efficacy of sporicidal wipes versus a cloth soaked in a 1,000 ppm chlorine solution. INTERVENTION A double-crossover study was performed on 2 different surgical and cardiovascular wards in a 1,000-bed teaching hospital over 29 weeks. The intervention period that consisted of surface decontamination with the preimpregnated wipe or cloth soaked in chlorine followed a 5-week baseline assessment of microbial bioburden on surfaces. Environmental samples from 11 surfaces were analyzed weekly for their microbial content. RESULTS A total of 1,566 environmental samples and 1,591 ATP swabs were analyzed during the trial. Overall, there were significant differences in the recovery of total aerobic bacteria (P < .001), total anaerobic bacteria (P < .001), and ATP measurement (P < .001) between wards and between the different parts of the crossover study. Generally, the use of wipes produced the largest reduction in the total aerobic and anaerobic counts when compared with the baseline data or the use of 1,000 ppm chlorine. Collectively, the introduction of training plus daily wipe disinfection significantly reduced multidrug-resistant organisms recovered from surfaces. Reversion to using 1,000 ppm chlorine resulted in the number of sites positive for multidrug-resistant organisms rising again. CONCLUSIONS This double-crossover study is the first controlled field trial comparison of using preimpregnated wipes versus cotton cloth dipped into a bucket of hypochlorite to decrease surface microbial bioburden. The results demonstrate the superiority of the preimpregnated wipes in significantly decreasing microbial bioburden from high-touch surfaces.
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Affiliation(s)
- Harsha Siani
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, UK
| | - Rebecca Wesgate
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, UK
| | - Jean-Yves Maillard
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, UK.
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Peng H, Zhang K, Liu Z, Xu Q, You B, Li C, Cao J, Zhou H, Li X, Chen J, Cheng G, Shi R, Zhang G. VPO1 Modulates Vascular Smooth Muscle Cell Phenotypic Switch by Activating Extracellular Signal-regulated Kinase 1/2 (ERK 1/2) in Abdominal Aortic Aneurysms. J Am Heart Assoc 2018; 7:e010069. [PMID: 30371171 PMCID: PMC6201418 DOI: 10.1161/jaha.118.010069] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 07/09/2018] [Indexed: 02/04/2023]
Abstract
Background Hydrogen peroxide (H2O2) is a critical molecular signal in the development of abdominal aortic aneurysm ( AAA ) formation. Vascular peroxidase 1 ( VPO 1) catalyzes the production of hypochlorous acid ( HOC l) from H2O2 and significantly enhances oxidative stress. The switch from a contractile phenotype to a synthetic one in vascular smooth muscle cells ( VSMC s) is driven by reactive oxygen species and is recognized as an early and important event in AAA formation. This study aims to determine if VPO 1 plays a critical role in the development of AAA by regulating VSMC phenotypic switch. Methods and Results VPO 1 is upregulated in human and elastase-induced mouse aneurysmal tissues compared with healthy control tissues. Additionally, KLF 4, a nuclear transcriptional factor, is upregulated in aneurysmatic tissues along with a concomitant downregulation of differentiated smooth muscle cell markers and an increase of synthetic phenotypic markers, indicating VSMC phenotypic switch in these diseased tissues. In cultured VSMC s from rat abdominal aorta, H2O2 treatment significantly increases VPO 1 expression and HOC l levels as well as VSMC phenotypic switch. In support of these findings, depletion of VPO 1 significantly attenuates the effects of H2O2 and HOC l treatment. Furthermore, HOC l treatment promotes VSMC phenotypic switch and ERK 1/2 phosphorylation. Pretreatment with U0126 (a specific inhibitor of ERK 1/2) significantly attenuates HOC l-induced VSMC phenotypic switch. Conclusions Our results demonstrate that VPO 1 modulates VSMC phenotypic switch through the H2O2/ VPO 1/ HOC l/ ERK 1/2 signaling pathway and plays a key role in the development of AAA . Our findings also implicate VPO 1 as a novel signaling node that mediates VSMC phenotypic switch and plays a key role in the development of AAA . Clinical Trial Registration URL : www.chictr.org.cn . Unique identifier: Chi CTR 1800016922.
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MESH Headings
- Aged
- Animals
- Aorta, Abdominal/cytology
- Aortic Aneurysm, Abdominal/metabolism
- Aortic Aneurysm, Abdominal/physiopathology
- Cell Movement
- Cell Proliferation
- Disease Models, Animal
- Female
- Hemeproteins/drug effects
- Hemeproteins/metabolism
- Humans
- Hydrogen Peroxide/pharmacology
- Hypochlorous Acid/pharmacology
- Kruppel-Like Factor 4
- Kruppel-Like Transcription Factors/metabolism
- MAP Kinase Signaling System
- Male
- Matrix Metalloproteinase 2/metabolism
- Mice
- Middle Aged
- Muscle Contraction
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/physiopathology
- Myocytes, Smooth Muscle/cytology
- Myocytes, Smooth Muscle/metabolism
- Oxidants/pharmacology
- Peroxidases/drug effects
- Peroxidases/metabolism
- Phenotype
- Reactive Oxygen Species
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Affiliation(s)
- Huihui Peng
- Department of Cardiovascular MedicineXiangya HospitalCentral South UniversityChangshaChina
| | - Kai Zhang
- Department of Cardiovascular MedicineXiangya HospitalCentral South UniversityChangshaChina
| | - Zhaoya Liu
- Department of Cardiovascular MedicineXiangya HospitalCentral South UniversityChangshaChina
| | - Qian Xu
- Department of Cardiovascular MedicineXiangya HospitalCentral South UniversityChangshaChina
| | - Baiyang You
- Department of Cardiovascular MedicineXiangya HospitalCentral South UniversityChangshaChina
| | - Chan Li
- Department of Cardiovascular MedicineXiangya HospitalCentral South UniversityChangshaChina
| | - Jing Cao
- Department of Cardiovascular MedicineXiangya HospitalCentral South UniversityChangshaChina
| | - Honghua Zhou
- Department of Cardiovascular MedicineXiangya HospitalCentral South UniversityChangshaChina
| | - Xiaohui Li
- Department of PharmacologySchool of Pharmaceutical SciencesCentral South UniversityChangshaChina
| | - Jia Chen
- Department of Humanistic NursingXiangya Nursing SchoolCentral South UniversityChangshaChina
| | - Guangjie Cheng
- Division of Pulmonary, Allergy & Critical Care MedicineDepartment of MedicineUniversity of Alabama at BirminghamAL
| | - Ruizheng Shi
- Department of Cardiovascular MedicineXiangya HospitalCentral South UniversityChangshaChina
| | - Guogang Zhang
- Department of Cardiovascular MedicineXiangya HospitalCentral South UniversityChangshaChina
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Green JN, Chapman ALP, Bishop CJ, Winterbourn CC, Kettle AJ. Neutrophil granule proteins generate bactericidal ammonia chloramine on reaction with hydrogen peroxide. Free Radic Biol Med 2017; 113:363-371. [PMID: 29055823 DOI: 10.1016/j.freeradbiomed.2017.10.343] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 10/14/2017] [Accepted: 10/16/2017] [Indexed: 12/30/2022]
Abstract
The neutrophil enzyme, myeloperoxidase, by converting hydrogen peroxide (H2O2) and chloride to hypochlorous acid (HOCl), provides important defense against ingested micro-organisms. However, there is debate about how efficiently HOCl is produced within the phagosome and whether its reactions with phagosomal constituents influence the killing mechanism. The phagosome is a small space surrounding the ingested organism, into which superoxide, H2O2 and high concentrations of proteins from cytoplasmic granules are released. Previous studies imply that HOCl is produced in the phagosome, but a large proportion should react with proteins before reaching the microbe. To mimic these conditions, we subjected neutrophil granule extract to sequential doses of H2O2. Myeloperoxidase in the extract converted all the H2O2 to HOCl, which reacted with the granule proteins. 3-Chlorotyrosine, protein carbonyls and large amounts of chloramines were produced. At higher doses of H2O2, the extract developed potent bactericidal activity against Staphylococcus aureus. This activity was due to ammonia monochloramine, formed as a secondary product from protein chloramines and dichloramines. Isolated myeloperoxidase and elastase also became bactericidal when modified with HOCl and antibacterial activity was seen with a range of species. Comparison of levels of protein modification in the extract and in phagosomes implies that a relatively low proportion of phagosomal H2O2 would be converted to HOCl, but there should be sufficient for substantial protein chloramine formation and some breakdown to ammonia monochloramine. It is possible that HOCl could kill ingested bacteria by an indirect mechanism involving protein oxidation and monochloramine formation.
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Affiliation(s)
- Jessie N Green
- Centre for Free Radical Research, Department of Pathology, University of Otago Christchurch, Christchurch, New Zealand
| | - Anna L P Chapman
- Centre for Free Radical Research, Department of Pathology, University of Otago Christchurch, Christchurch, New Zealand
| | - Cynthia J Bishop
- Centre for Free Radical Research, Department of Pathology, University of Otago Christchurch, Christchurch, New Zealand
| | - Christine C Winterbourn
- Centre for Free Radical Research, Department of Pathology, University of Otago Christchurch, Christchurch, New Zealand.
| | - Anthony J Kettle
- Centre for Free Radical Research, Department of Pathology, University of Otago Christchurch, Christchurch, New Zealand
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Kuznetsova T, Kulahava T, Zholnerevich I, Amaegberi N, Semenkova G, Shadyro O, Arnhold J. Morphometric characteristics of neutrophils stimulated by adhesion and hypochlorite. Mol Immunol 2017; 87:317-324. [PMID: 28544986 DOI: 10.1016/j.molimm.2017.05.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 04/03/2017] [Accepted: 05/06/2017] [Indexed: 11/18/2022]
Abstract
The aim of this work was to compare cell form, size and volume as well as the locomotor activity of polymorphonuclear leukocytes (PMNLs) stimulated by adhesion to glass and exposed to hypochlorous acid at non-toxic dose. After 20min of adhesion to a glass surface, volume, cell surface area and projection area of PMNLs were equaled to 143.1±21.4μm3, 288.8±28.8μm2 and 248.3±32.3μm2, respectively. Projection area of PMNLs exposed to NaOCl was noticeably enlarged as compared with control samples. The cell volume of 20min adherent cells exposed to NaOCl was enlarged in comparison with both control cells and 5min adhered exposed to NaOCl cells. NaOCl exposure induced a degranulation of PMNLs as measured by lysozyme release. Granules could be found both above the cell surface and on the substratum near the cell. The S/V ratio for PMNLs increased (from 1.52 to 2.02μm-1) with the increasing of cell activation time. But at NaOCl addition the reverse tendency was observed (from 2.10 to 1.87μm-1). In cells exposed to NaOCl the redistribution and decrease of concentration of F-actin took place. This observation supports the hypothesis that the priming of PMNLs with hypochlorous acid modifies cell motility and morphology and reflects also on other functions.
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Affiliation(s)
- Tatsiana Kuznetsova
- N.I. Pirogov Russian National Research Medical University, Moscow, Russian Federation.
| | - Tatsiana Kulahava
- Department of Biophysics, Faculty of Physics, Belarusian State University, Minsk, Belarus.
| | - Ivan Zholnerevich
- Department of Biophysics, Faculty of Physics, Belarusian State University, Minsk, Belarus.
| | - Nadezda Amaegberi
- Department of Radiation Chemistry and Pharmaceutical Technologies, Faculty of Chemistry, Belarusian State University, Minsk, Belarus.
| | - Galina Semenkova
- Department of Radiation Chemistry and Pharmaceutical Technologies, Faculty of Chemistry, Belarusian State University, Minsk, Belarus.
| | - Oleg Shadyro
- Department of Radiation Chemistry and Pharmaceutical Technologies, Faculty of Chemistry, Belarusian State University, Minsk, Belarus.
| | - Juergen Arnhold
- Institute for Medical Physics and Biophysics, Medical Faculty, University of Leipzig, Leipzig, Germany.
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Abstract
Chronic periodontitis is a multi-factorial disease involving anaerobic bacteria and the generation of an inflammatory response, including the production of metalloproteinases, pro-inflammatory cytokines, and eicosanoids. Hypochlorous acid (HOCl) and taurine-N-monochloramine (TauCl) are the end-products of the neutrophilic polymorphonuclear leukocyte (PMN) respiratory burst. They act synergistically to modulate the inflammatory response. In the extracellular environment, HOCl and TauCl may directly neutralize interleukin 6 (IL-6) and several metalloproteinases, while HOCl increases the capacity of α2-macroglobulin to bind Tumor Necrosis Factor-alpha, IL-2, and IL-6, and facilitates the release of various growth factors. TauCl inhibits the production of inflammatory mediators, prostaglandins, and nitric oxide. HOCl activates tyrosine kinase signaling cascades, generating an increase in the production of extracellular matrix components, growth factors, and inflammatory mediators. Thus, HOCl and TauCl appear to play a crucial role in the periodontal inflammatory process. Taken together, these findings may offer opportunities for the development of novel host-modulating therapies for the treatment of periodontitis.
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Affiliation(s)
- A Mainnemare
- UFR d'Odontologie, Service de Parodontologie, 1 Place Alexis Ricordeau, BP 84215, 44 042 Nantes, Cedex 1, France
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47
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Chen CJ, Chen CC, Ding SJ. Effectiveness of Hypochlorous Acid to Reduce the Biofilms on Titanium Alloy Surfaces in Vitro. Int J Mol Sci 2016; 17:E1161. [PMID: 27447617 PMCID: PMC4964533 DOI: 10.3390/ijms17071161] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 06/15/2016] [Accepted: 07/15/2016] [Indexed: 11/17/2022] Open
Abstract
Chemotherapeutic agents have been used as an adjunct to mechanical debridement for peri-implantitis treatment. The present in vitro study evaluated and compared the effectiveness of hypochlorous acid (HOCl), sodium hypochlorite (NaOCl), and chlorhexidine (CHX) at eliminating Gram-negative (E. coli and P. gingivalis) and Gram-positive (E. faecalis and S. sanguinis) bacteria. The effect of irrigating volume and exposure time on the antimicrobial efficacy of HOCl was evaluated, and a durability analysis was completed. Live/dead staining, morphology observation, alamarBlue assay, and lipopolysaccharide (LPS) detection were examined on grit-blasted and biofilm-contaminated titanium alloy discs after treatment with the three chemotherapeutic agents. The results indicated that HOCl exhibited better antibacterial efficacy with increasing irrigating volumes. HOCl achieved greater antibacterial efficacy as treatment time was increased. A decrease in antimicrobial effectiveness was observed when HOCl was unsealed and left in contact with the air. All the irrigants showed antibacterial activity and killed the majority of bacteria on the titanium alloy surfaces of biofilm-contaminated implants. Moreover, HOCl significantly lowered the LPS concentration of P. gingivalis when compared with NaOCl and CHX. Thus, a HOCl antiseptic may be effective for cleaning biofilm-contaminated implant surfaces.
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Affiliation(s)
- Chun-Ju Chen
- Institute of Oral Science, Chung Shan Medical University, Taichung City 402, Taiwan.
| | - Chun-Cheng Chen
- School of Dentistry, Chung Shan Medical University, Taichung City 402, Taiwan.
- Department of Dentistry, Chung Shan Medical University Hospital, Taichung City 402, Taiwan.
| | - Shinn-Jyh Ding
- Institute of Oral Science, Chung Shan Medical University, Taichung City 402, Taiwan.
- School of Dentistry, Chung Shan Medical University, Taichung City 402, Taiwan.
- Department of Dentistry, Chung Shan Medical University Hospital, Taichung City 402, Taiwan.
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48
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Heinzelmann S, Bauer G. Site-specific Effects of DUOX1-Related Peroxidase on Intercellular Apoptosis Signaling. Anticancer Res 2015; 35:5955-5971. [PMID: 26504019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Intercellular apoptosis-inducing HOCl signaling is known as an interplay between superoxide anions/H₂O₂ of transformed target cells and dual oxidase 1 (DUOX1)-related peroxidase that is released from neighboring non-transformed or transformed effector cells. Effector cells are dispensable when the release of the peroxidase domain of DUOX1 from target cells is prevented through inhibition of matrix metalloproteinase (MMP) activity. Membrane-associated peroxidase is then co-localized to NADPH oxidase 1 (NOX1) and establishes HOCl signaling specifically in transformed cells, using the same biochemical pathways as classical intercellular HOCl signaling. Membrane-associated peroxidase protects against exogenous HOCl through reversal of the peroxidase reaction. In addition, membrane-associated peroxidase protects against NO/peroxynitrite signaling as it oxidates NO and decomposes peroxynitrite. The protective function of membrane-associated peroxidase (in the absence of MMP) is analogous to that of catalase, whereas the destructive effect of the enzyme, i.e. the synthesis of HOCl, is independent of its localization and of MMP activity.
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Affiliation(s)
- Sonja Heinzelmann
- Institute of Virology, Department of Medical Microbiology and Hygiene, University of Freiburg, Freiburg, Germany
| | - Georg Bauer
- Institute of Virology, Department of Medical Microbiology and Hygiene, University of Freiburg, Freiburg, Germany
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49
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Pottgiesser SJ, Heinzelmann S, Bauer G. Intercellular HOCl-mediated Apoptosis Induction in Malignant Cells: Interplay Between NOX1-Dependent Superoxide Anion Generation and DUOX-related HOCl-generating Peroxidase Activity. Anticancer Res 2015; 35:5927-5943. [PMID: 26504017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Intercellular apoptosis-inducing HOCl signaling is discussed as a control step during oncogenesis. It is defined as a sophisticated interplay between transformed target cells and non-transformed or transformed effector cells. In this study, transformed target cells were seeded as clumps of high local cell density, but low total cell number. They were surrounded by large numbers of effector cells, seeded at low local density. This spatially defined experimental arrangement allowed study of the impact of siRNA-mediated knockdown of NADPH oxidase 1 (NOX1) or dual oxidase 1 (DUOX1) on intercellular HOCl signaling. Our data show that the target function of transformed cells is defined as expression of NOX1 and subsequent extracellular superoxide anion generation. The NOX domain of DUOX1 does not contribute to the target function. The peroxidase domain of DUOX1 is released from transforming growth factor β1-treated non-transformed and transformed cells and acts in trans as HOCl-synthesizing peroxidase. These findings clarify the biochemical source of HOCl during HOCl-mediated signaling.
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Affiliation(s)
- Stefanie J Pottgiesser
- Department of Medical Microbiology and Hygiene, Institute of Virology, University of Freiburg, Freiburg, Germany
| | - Sonja Heinzelmann
- Department of Medical Microbiology and Hygiene, Institute of Virology, University of Freiburg, Freiburg, Germany
| | - Georg Bauer
- Department of Medical Microbiology and Hygiene, Institute of Virology, University of Freiburg, Freiburg, Germany
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50
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Veres G, Hegedűs P, Barnucz E, Zöller R, Klein S, Schmidt H, Radovits T, Korkmaz S, Karck M, Szabó G. Endothelial dysfunction of bypass graft: direct comparison of in vitro and in vivo models of ischemia-reperfusion injury. PLoS One 2015; 10:e0124025. [PMID: 25875813 PMCID: PMC4398487 DOI: 10.1371/journal.pone.0124025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Accepted: 03/09/2015] [Indexed: 11/23/2022] Open
Abstract
Background Although, ischemia/reperfusion induced vascular dysfunction has been widely described, no comparative study of in vivo- and in vitro-models exist. In this study, we provide a direct comparison between models (A) ischemic storage and in-vitro reoxygenation (B) ischemic storage and in vitro reperfusion (C) ischemic storage and in-vivo reperfusion. Methods and Results Aortic arches from rats were stored for 2 hours in saline. Arches were then (A) in vitro reoxygenated (B) in vitro incubated in hypochlorite for 30 minutes (C) in vivo reperfused after heterotransplantation (2, 24 hours and 7 days reperfusion). Endothelium-dependent and independent vasorelaxations were assessed in organ bath. DNA strand breaks were assessed by TUNEL-method, mRNA expressions (caspase-3, bax, bcl-2, eNOS) by quantitative real-time PCR, proteins by Western blot analysis and the expression of CD-31 by immunochemistry. Endothelium-dependent maximal relaxation was drastically reduced in the in-vivo models compared to ischemic storage and in-vitro reperfusion group, and no difference showed between ischemic storage and control group. CD31-staining showed significantly lower endothelium surface ratio in-vivo, which correlated with TUNEL-positive ratio. Increased mRNA and protein levels of pro- and anti-apoptotic gens indicated a significantly higher damage in the in-vivo models. Conclusion Even short-period of ischemia induces severe endothelial damage (in-vivo reperfusion model). In-vitro models of ischemia-reperfusion injury can be limitedly suited for reliable investigations. Time course of endothelial stunning is also described.
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Affiliation(s)
- Gábor Veres
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
- * E-mail:
| | - Péter Hegedűs
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
- Heart Center, Semmelweis University, Budapest, Hungary
| | - Enikő Barnucz
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Raphael Zöller
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Stephanie Klein
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Harald Schmidt
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | | | - Sevil Korkmaz
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Matthias Karck
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Gábor Szabó
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
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