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Tarff A, Drew-Bear LE, Yee R, Cano M, Zhang Y, Behrens A. Bactericidal Efficacy of High Irradiance Ultraviolet A Photoactivation of Riboflavin Versus Standard Corneal Cross-Linking Protocol In Vitro. Cornea 2022; 41:1166-1170. [PMID: 35849757 DOI: 10.1097/ico.0000000000003031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 02/11/2022] [Indexed: 11/25/2022]
Abstract
PURPOSE The purpose of this study was to compare the efficacy of high ultraviolet A (UVA) irradiance photoactivation of riboflavin (vitamin B2) versus the standard corneal cross-linking protocol on bacterial viability. METHODS Methicillin-sensitive Staphylococcus aureus (MSSA) Newman strain and methicillin-resistant multidrug-resistant S. aureus (MDR-MRSA) USA300, CA409, CA127, GA656, and NY315 strains were exposed to a UVA energy dose of 5.4 to 6 J/cm 2 by 2 high irradiance regimens: A) 30 mW/cm 2 for 3 minutes and B) 10 mW/cm 2 for 10 minutes with B2 0.1%. Control groups included B2/UVA alone, CA409 exposed to standard B2 0.1% + UVA (3 mW/cm 2 for 30 minutes), and an untreated sample. Cell viability was assessed. Triplicate values were obtained. The Mann-Whitney test and Student t test were used for statistical analysis. RESULTS There was no difference comparing the median bacterial load (log CFU/mL) of the untreated samples versus regimen A: Newman P = 0.7, CA409 P = 0.3, USA300 P = 0.5, CA127 P = 0.6, GA656 P = 0.1, and NY315 P = 0.2 ( P ≥ 0.1); and B: Newman P = 0.1, CA409 P = 0.3, USA300 P = 0.4, CA127 P = 0.6, GA656 P = 0.1, and NY315 P = 0.3 ( P ≥ 0.1). Standard regimen killed 100% of CA409. CONCLUSIONS Photoactivation of B2 by high UVA irradiance does not seem to be effective for bacterial eradication in this study.
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Affiliation(s)
- Andreina Tarff
- The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD. Dr. Tarff is now with the Department of Graduate Medical Education, Louis A. Weiss Memorial Hospital, Chicago, IL; and
| | - Laura E Drew-Bear
- The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD. Dr. Tarff is now with the Department of Graduate Medical Education, Louis A. Weiss Memorial Hospital, Chicago, IL; and
| | - Rebecca Yee
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD. Dr. Yee is now with the Department of Pathology, The George Washington University School of Medicine and Health Sciences, Washington DC. Dr. Zhang is now with the State Key Laboratory for the Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Marisol Cano
- The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD. Dr. Tarff is now with the Department of Graduate Medical Education, Louis A. Weiss Memorial Hospital, Chicago, IL; and
| | - Ying Zhang
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD. Dr. Yee is now with the Department of Pathology, The George Washington University School of Medicine and Health Sciences, Washington DC. Dr. Zhang is now with the State Key Laboratory for the Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Ashley Behrens
- The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD. Dr. Tarff is now with the Department of Graduate Medical Education, Louis A. Weiss Memorial Hospital, Chicago, IL; and
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López-López N, Muñoz Resta I, de Llanos R, Miravet JF, Mikhaylov M, Sokolov MN, Ballesta S, García-Luque I, Galindo F. Photodynamic Inactivation of Staphylococcus aureus Biofilms Using a Hexanuclear Molybdenum Complex Embedded in Transparent polyHEMA Hydrogels. ACS Biomater Sci Eng 2020; 6:6995-7003. [DOI: 10.1021/acsbiomaterials.0c00992] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Noelia López-López
- Departamento de Química Inórganica y Orgánica, Universitat Jaume I, Av. Sos Baynat s/n, 12071 Castellón, Spain
| | - Ignacio Muñoz Resta
- Departamento de Química Inórganica y Orgánica, Universitat Jaume I, Av. Sos Baynat s/n, 12071 Castellón, Spain
| | - Rosa de Llanos
- Unidad Predepartamental de Medicina, Universitat Jaume I, Av. Sos Baynat s/n, 12071 Castellón, Spain
| | - Juan F. Miravet
- Departamento de Química Inórganica y Orgánica, Universitat Jaume I, Av. Sos Baynat s/n, 12071 Castellón, Spain
| | - Maxim Mikhaylov
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 3 Acad. Lavrentiev Prosp., 630090 Novosibirsk, Russia
| | - Maxim N. Sokolov
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 3 Acad. Lavrentiev Prosp., 630090 Novosibirsk, Russia
| | - Sofía Ballesta
- Departamento de Microbiología, Facultad de Medicina, Universidad de Sevilla, Av. De Sanchéz Pizjuán s/n, 41009 Sevilla, Spain
- Red Española de Investigación en Patología Infecciosa (REIPI RD16/0016/0001), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Isabel García-Luque
- Departamento de Microbiología, Facultad de Medicina, Universidad de Sevilla, Av. De Sanchéz Pizjuán s/n, 41009 Sevilla, Spain
- Red Española de Investigación en Patología Infecciosa (REIPI RD16/0016/0001), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Francisco Galindo
- Departamento de Química Inórganica y Orgánica, Universitat Jaume I, Av. Sos Baynat s/n, 12071 Castellón, Spain
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Pestana CJ, Hobson P, Robertson PKJ, Lawton LA, Newcombe G. Removal of microcystins from a waste stabilisation lagoon: Evaluation of a packed-bed continuous flow TiO 2 reactor. CHEMOSPHERE 2020; 245:125575. [PMID: 31846787 DOI: 10.1016/j.chemosphere.2019.125575] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 10/26/2019] [Accepted: 12/07/2019] [Indexed: 06/10/2023]
Abstract
Photocatalysis has been shown to successfully remove microcystins (MC) in laboratory experiments. Most research to date has been performed under ideal conditions in pure or ultrapure water. In this investigation the efficiency of photocatalysis using titanium dioxide was examined in a complex matrix (waste stabilisation lagoon water). A flow-through photocatalytic reactor was used for the photocatalytic removal of four commonly occurring microcystin analogues (MC-YR, MC-RR, MC-LR, and MC-LA). Up to 51% removal for single MC analogues in waste lagoon water was observed. Similar removal rates were observed when a mixture of all four MC analogues was treated. Although treatment of MC-containing cyanobacterial cells of Microcystis aeruginosa resulted in no decline in cell numbers or viability with the current reactor design and treatment regime, the photocatalytic treatment did improve the overall quality of waste lagoon water. This study demonstrates that despite the presence of natural organic matter the microcystins could be successfully degraded in a complex environmental matrix.
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Affiliation(s)
- Carlos J Pestana
- Australian Water Quality Centre, South Australian Water Corporation, 250 Victoria Square, Adelaide, SA, 5000, Australia; School of Pharmacy and Life Sciences, Robert Gordon University, Sir Ian Wood Building, Garthdee Road, AB10 7GJ, Aberdeen, UK.
| | - Peter Hobson
- Australian Water Quality Centre, South Australian Water Corporation, 250 Victoria Square, Adelaide, SA, 5000, Australia
| | - Peter K J Robertson
- School of Chemistry and Chemical Engineering, Queen's University, David Keir Building, 39 Stranmillis Road, BT9 5 AG, Belfast, UK
| | - Linda A Lawton
- School of Pharmacy and Life Sciences, Robert Gordon University, Sir Ian Wood Building, Garthdee Road, AB10 7GJ, Aberdeen, UK
| | - Gayle Newcombe
- Australian Water Quality Centre, South Australian Water Corporation, 250 Victoria Square, Adelaide, SA, 5000, Australia
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Q Mesquita M, J Dias C, P M S Neves MG, Almeida A, F Faustino MA. Revisiting Current Photoactive Materials for Antimicrobial Photodynamic Therapy. Molecules 2018; 23:E2424. [PMID: 30248888 PMCID: PMC6222430 DOI: 10.3390/molecules23102424] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 09/14/2018] [Accepted: 09/18/2018] [Indexed: 12/22/2022] Open
Abstract
Microbial infection is a severe concern, requiring the use of significant amounts of antimicrobials/biocides, not only in the hospital setting, but also in other environments. The increasing use of antimicrobial drugs and the rapid adaptability of microorganisms to these agents, have contributed to a sharp increase of antimicrobial resistance. It is obvious that the development of new strategies to combat planktonic and biofilm-embedded microorganisms is required. Photodynamic inactivation (PDI) is being recognized as an effective method to inactivate a broad spectrum of microorganisms, including those resistant to conventional antimicrobials. In the last few years, the development and biological assessment of new photosensitizers for PDI were accompanied by their immobilization in different supports having in mind the extension of the photodynamic principle to new applications, such as the disinfection of blood, water, and surfaces. In this review, we intended to cover a significant amount of recent work considering a diversity of photosensitizers and supports to achieve an effective photoinactivation. Special attention is devoted to the chemistry behind the preparation of the photomaterials by recurring to extensive examples, illustrating the design strategies. Additionally, we highlighted the biological challenges of each formulation expecting that the compiled information could motivate the development of other effective photoactive materials.
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Affiliation(s)
- Mariana Q Mesquita
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal.
- Department of Biomedical Sciences and iBiMED, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Cristina J Dias
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Maria G P M S Neves
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Adelaide Almeida
- Department of Biology CESAM, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - M Amparo F Faustino
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal.
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García-Fresnadillo D. Singlet Oxygen Photosensitizing Materials for Point-of-Use Water Disinfection with Solar Reactors. CHEMPHOTOCHEM 2018. [DOI: 10.1002/cptc.201800062] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- David García-Fresnadillo
- Department of Organic Chemistry; Faculty of Chemical Sciences; Universidad Complutense de Madrid; Avenida Complutense s/n, E- 28040 Madrid Spain
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6
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Chemical Quenching of Singlet Oxygen and Other Reactive Oxygen Species in Water: A Reliable Method for the Determination of Quantum Yields in Photochemical Processes? CHEMPHOTOCHEM 2018. [DOI: 10.1002/cptc.201800038] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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7
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Mendoza C, Emmanuel N, Páez CA, Dreesen L, Monbaliu JCM, Heinrichs B. Transitioning from conventional batch to microfluidic processes for the efficient singlet oxygen photooxygenation of methionine. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.12.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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8
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Morozov M, Carmieli R, Lahav M, van der Boom ME. Light-Activated Antibacterial Nanoscale Films: Metallo-Organics for Catalytic Generation of Chemically Accessible Singlet-Oxygen in Water. ChemistrySelect 2017. [DOI: 10.1002/slct.201601724] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Michael Morozov
- Department of Organic Chemistry; Weizmann Institute of Science; 7610001 Rehovot Israel
| | - Raanan Carmieli
- Department of Chemical Research Support; Weizmann Institute of Science; 7610001 Rehovot Israel
| | - Michal Lahav
- Department of Organic Chemistry; Weizmann Institute of Science; 7610001 Rehovot Israel
| | - Milko E. van der Boom
- Department of Organic Chemistry; Weizmann Institute of Science; 7610001 Rehovot Israel
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9
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Fluorescent mesoporous organosilicas containing 1,4-diureyl terephthalate moieties. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.04.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Chang SY, Huang WJ, Lu BR, Fang GC, Chen Y, Chen HL, Chang MC, Hsu CF. An Environmentally Friendly Method for Testing Photocatalytic Inactivation of Cyanobacterial Propagation on a Hybrid Ag-TiO₂ Photocatalyst under Solar Illumination. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2015; 12:15819-33. [PMID: 26690465 PMCID: PMC4690959 DOI: 10.3390/ijerph121215023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Revised: 12/03/2015] [Accepted: 12/04/2015] [Indexed: 12/04/2022]
Abstract
Cyanobacteria were inactivated under sunlight using mixed phase silver (Ag) and deposited titanium dioxide (TiO₂) coated on the surface of diatomite (DM) as a hybrid photocatalyst (Ag-TiO₂/DM). The endpoints of dose-response experiments were chlorophyll a, photosynthetic efficiency, and flow cytometry measurements. In vitro experiments revealed that axenic cultures of planktonic cyanobacteria lost their photosynthetic activity following photocatalyzed exposure to sunlight for more than 24 h. Nearly 92% of Microcystis aeruginosa cells lost their photosynthetic activity, and their cell morphology was severely damaged within 24 h of the reaction. Preliminary carbon-14 ((14)CO₃(-2)) results suggest that the complete inactivation of cyanobacteria arises from damage to cell wall components (peroxidation). A small concomitant increase in cell wall disorder and a consequent decrease in cell wall functional groups increase the cell wall fluidity prior to cell lysis. A high dosage of Ag-TiO₂/DM during photocatalysis increased the concentration of extracellular polymeric substances (EPSs) in the Microcystis aeruginosa suspension by up to approximately 260%. However, photocatalytic treatment had a small effect on the disinfection by-product (DBP) precursor, as revealed by only a slight increase in the formation of trihalomethanes (THMs) and haloacetic acids (HAAs).
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Affiliation(s)
- Shu-Yu Chang
- Kuang-Tien General Hospital, No. 117, Satien Road, Shalu District, Taichung 43303, Taiwan.
| | - Winn-Jung Huang
- Department of Safety, Health and Environmental Engineering, Hungkuang University, No. 1018 Sec. 6, Taiwan Boulevard, Shalu District, Taichung 43302, Taiwan.
| | - Ben-Ren Lu
- Department of Electronics and Communication Engineering, Peking University, No. 5, Zhuangyuan Road, Binhu District, Wuxi 214125, China.
| | - Guor-Cheng Fang
- Department of Safety, Health and Environmental Engineering, Hungkuang University, No. 1018 Sec. 6, Taiwan Boulevard, Shalu District, Taichung 43302, Taiwan.
| | - Yeah Chen
- Department of Safety, Health and Environmental Engineering, Hungkuang University, No. 1018 Sec. 6, Taiwan Boulevard, Shalu District, Taichung 43302, Taiwan.
| | - Hsiu-Lin Chen
- Department of Safety, Health and Environmental Engineering, Hungkuang University, No. 1018 Sec. 6, Taiwan Boulevard, Shalu District, Taichung 43302, Taiwan.
| | - Ming-Chin Chang
- Department of Safety, Health and Environmental Engineering, Hungkuang University, No. 1018 Sec. 6, Taiwan Boulevard, Shalu District, Taichung 43302, Taiwan.
| | - Cheng-Feng Hsu
- Department of Safety, Health and Environmental Engineering, Hungkuang University, No. 1018 Sec. 6, Taiwan Boulevard, Shalu District, Taichung 43302, Taiwan.
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Immobilized photosensitizers for antimicrobial applications. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 150:11-30. [DOI: 10.1016/j.jphotobiol.2015.04.021] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 04/17/2015] [Accepted: 04/19/2015] [Indexed: 01/21/2023]
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12
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Piwowar K, Blacha-Grzechnik A, Zak J. Photogeneration of singlet oxygen by thionine molecular layer grafted on electrode surface from its diazonium salt. Electrochem commun 2015. [DOI: 10.1016/j.elecom.2015.03.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Fabregat V, Burguete MI, Galindo F, Luis SV. Singlet oxygen generation by photoactive polymeric microparticles with enhanced aqueous compatibility. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:11884-11892. [PMID: 24271726 DOI: 10.1007/s11356-013-2311-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Accepted: 10/28/2013] [Indexed: 06/02/2023]
Abstract
Two new photoactive materials compatible with environmentally friendly solvents (water and methanol) have been synthesized and characterized. They are comprised of a porous matrix of polystyrene and divinylbenzene with bound Rose Bengal and additional pendant groups added to increase the hydrophilicity (ethylenediamine and γ-gluconolactone). The new polymers are efficient photocatalysts capable of generating singlet oxygen after irradiation with visible light. Photochemical oxygenations of 9,10-anthracenedipropionic acid and 2-furoic acid have been carried out. The measured conversions indicate that the new supported photosensitizers are more effective than the parent hydrophobic polymer.
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Affiliation(s)
- Víctor Fabregat
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I, Av. Sos Baynat, s/n, 12071, Castellón, Spain
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Craig RA, McCoy CP, Gorman SP, Jones DS. Photosensitisers - the progression from photodynamic therapy to anti-infective surfaces. Expert Opin Drug Deliv 2014; 12:85-101. [PMID: 25247277 DOI: 10.1517/17425247.2015.962512] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION The application of light as a stimulus in pharmaceutical systems and the associated ability to provide precise spatiotemporal control over location, wavelength and intensity, allowing ease of external control independent of environmental conditionals, has led to its increased use. Of particular note is the use of light with photosensitisers. AREAS COVERED Photosensitisers are widely used in photodynamic therapy to cause a cidal effect towards cells on irradiation due to the generation of reactive oxygen species. These cidal effects have also been used to treat infectious diseases. The effects and benefits of photosensitisers in the treatment of such conditions are still being developed and further realised, with the design of novel delivery strategies. This review provides an overview of the realisation of the pharmaceutically relevant uses of photosensitisers, both in the context of current research and in terms of current clinical application, and looks to the future direction of research. EXPERT OPINION Substantial advances have been and are being made in the use of photosensitisers. Of particular note are their antimicrobial applications, due to absence of resistance that is so frequently associated with conventional treatments. Their potency of action and the ability to immobilise to polymeric supports is opening a wide range of possibilities with great potential for use in healthcare infection prevention strategies.
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Affiliation(s)
- Rebecca A Craig
- Queen's University Belfast, School of Pharmacy , 97 Lisburn Road, Belfast, BT9 7BL , UK
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15
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Litman Y, Voss MG, Rodríguez HB, San Román E. Effect of Concentration on the Formation of Rose Bengal Triplet State on Microcrystalline Cellulose: A Combined Laser-Induced Optoacoustic Spectroscopy, Diffuse Reflectance Flash Photolysis, and Luminescence Study. J Phys Chem A 2014; 118:10531-7. [DOI: 10.1021/jp5045095] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Yair Litman
- INQUIMAE
(UBA-CONICET)/DQIAyQF, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, Buenos Aires, Argentina
| | - Matthew G. Voss
- INQUIMAE
(UBA-CONICET)/DQIAyQF, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, Buenos Aires, Argentina
| | - Hernán B. Rodríguez
- INQUIMAE
(UBA-CONICET)/DQIAyQF, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, Buenos Aires, Argentina
- INIFTA
(UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Diag. 113 y Calle 64, La Plata, Argentina
| | - Enrique San Román
- INQUIMAE
(UBA-CONICET)/DQIAyQF, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, Buenos Aires, Argentina
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Choudhury R, Greer A. Synergism between airborne singlet oxygen and a trisubstituted olefin sulfonate for the inactivation of bacteria. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:3599-3605. [PMID: 24611688 PMCID: PMC3993907 DOI: 10.1021/la404564k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 01/26/2014] [Indexed: 05/30/2023]
Abstract
The reactivity of a trisubstituted alkene surfactant (8-methylnon-7-ene-1 sulfonate, 1) to airborne singlet oxygen in a solution containing E. coli was examined. Surfactant 1 was prepared by a Strecker-type reaction of 9-bromo-2-methylnon-2-ene with sodium sulfite. Submicellar concentrations of 1 were used that reacted with singlet oxygen by an "ene" reaction to yield two hydroperoxides (7-hydroperoxy-8-methylnon-8-ene-1 sulfonate and (E)-8-hydroperoxy-8-methylnon-6-ene-1 sulfonate) in a 4:1 ratio. Exchanging the H2O solution for D2O where the lifetime of solution-phase singlet oxygen increases by 20-fold led to an ∼2-fold increase in the yield of hydroperoxides pointing to surface activity of singlet oxygen with the surfactant in a partially solvated state. In this airborne singlet oxygen reaction, E. coli inactivation was monitored in the presence and absence of 1 and by a LIVE/DEAD cell permeabilization assay. It was shown that the surfactant has low dark toxicity with respect to the bacteria, but in the presence of airborne singlet oxygen, it produces a synergistic enhancement of the bacterial inactivation. How the ene-derived surfactant hydroperoxides can provoke (1)O2 toxicity and be of general utility is discussed.
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17
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Arzoumanian E, Ronzani F, Trivella A, Oliveros E, Sarakha M, Richard C, Blanc S, Pigot T, Lacombe S. Transparent organosilica photocatalysts activated by visible light: photophysical and oxidative properties at the gas-solid interface. ACS APPLIED MATERIALS & INTERFACES 2014; 6:275-288. [PMID: 24304089 DOI: 10.1021/am404175y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The photophysical properties of several photosensitizers (PSs) included or grafted in silica monoliths were compared to their properties in solution. The effects of the solid support on their steady-state and transient absorption spectra, on their quantum yields of singlet oxygen ((1)O2) production, and on their ability to photoinduce the oxidation of dimethylsulfide (DMS) were investigated. Two cyanoanthracene derivatives (9,14-dicyanobenzo[b]triphenylene, DBTP, and 9,10-dicyanoanthracene, DCA), as well as three phenothiazine dyes (methylene blue, MB(+), new methylene blue, NMB(+), methylene violet, MV), were encapsulated in silica, analyzed and compared to two reference PSs (perinaphthenone, PN and rose bengal, RB). A DBTP derivative (3-[N-(N″-triethoxysilylpropyl-N'-hexylurea)]carboxamido-9,14-dicyanobenzo[b]triphenylene, 3) was also prepared and grafted onto silica. Thanks to the transparency and the free-standing shape of the monoliths, the complete spectroscopic characterization of the supported PSs was carried out directly at the gas-solid interface. The influence of the silica network, the PS, and the adsorption/grafting link between the PS and silica was investigated. The effects of PS concentration, gaseous atmosphere, humidity, and hydrophobicity on the production of (1)O2 were analyzed. With all PSs, (1)O2 production was very efficient (quantum yields of (1)O2 production, relative to PN, between 0.6 and 1), and this species was the only one involved in the pollutant photooxidation. The influence of the matrix on the PSs' photophysics could be considered as negligible. In contrast, the matrix effect on DMS photooxidation was extremely important: the gas diffusion inside the porous structure, and thus, the photoactivity of the materials, strictly depended on silica's surface area and porosity. Our results highlight the suitability of these silica structures as inert supports for the study of the photosensitizing properties at the gas-solid interface. Moreover, thanks to the adsorption properties of the matrix, the synthesized materials can be used as microphotoreactor for the (1)O2-mediated oxidation of volatile pollutants.
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Affiliation(s)
- Emmanuel Arzoumanian
- Laboratoire des IMRCP, UMR CNRS 5623, Université Toulouse III (Paul Sabatier, UPS) , 118 route de Narbonne F-31062 Toulouse Cedex 9, France
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18
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Grüner M, Siozios V, Hagenhoff B, Breitenstein D, Strassert CA. Structural and Photosensitizing Features of Phthalocyanine-Zeolite Hybrid Nanomaterials. Photochem Photobiol 2013; 89:1406-12. [DOI: 10.1111/php.12141] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 07/03/2013] [Indexed: 01/02/2023]
Affiliation(s)
- Malte Grüner
- CeNTech; Physikalisches Institut; Westfälische Wilhelms-Universität Münster; Münster Germany
| | - Vassilios Siozios
- MEET; Institut für Physikalische Chemie; Westfälische Wilhelms-Universität Münster; Münster Germany
| | | | | | - Cristian A. Strassert
- CeNTech; Physikalisches Institut; Westfälische Wilhelms-Universität Münster; Münster Germany
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Visible-light photosensitized oxidation of α-terpinene using novel silica-supported sensitizers: Photooxygenation vs. photodehydrogenation. J Catal 2013. [DOI: 10.1016/j.jcat.2013.04.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Merchán M, Ouk TS, Kubát P, Lang K, Coelho C, Verney V, Commereuc S, Leroux F, Sol V, Taviot-Guého C. Photostability and photobactericidal properties of porphyrin-layered double hydroxide–polyurethane composite films. J Mater Chem B 2013; 1:2139-2146. [DOI: 10.1039/c3tb20070a] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Bartusik D, Aebisher D, Lyons A, Greer A. Bacterial inactivation by a singlet oxygen bubbler: identifying factors controlling the toxicity of (1)O2 bubbles. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:12098-12104. [PMID: 23075418 PMCID: PMC3812664 DOI: 10.1021/es303645n] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A microphotoreactor device was developed to generate bubbles (1.4 mm diameter, 90 μL) containing singlet oxygen at levels toxic to bacteria and fungus. As singlet oxygen decays rapidly to triplet oxygen, the bubbles leave behind no waste or byproducts other than O(2). From a comparative study in deaerated, air saturated, and oxygenated solutions, it was reasoned that the singlet oxygen bubbles inactivate Escherichia coli and Aspergillus fumigatus, mainly by an oxygen gradient inside and outside of the bubble such that singlet oxygen is solvated and diffuses through the aqueous solution until it reacts with the target organism. Thus, singlet oxygen bubble toxicity was inversely proportional to the amount of dissolved oxygen in solution. In a second mechanism, singlet oxygen interacts directly with E. coli that accumulate at the gas-liquid interface although this mechanism operates at a rate approximately 10 times slower. Due to encapsulation in the gaseous core of the bubble and a 0.98 ms lifetime, the bubbles can traverse relatively long 0.39 mm distances carrying (1)O(2) far into the solution; by comparison the diffusion distance of (1)O(2) fully solvated in H(2)O is much shorter (~150 nm). Bubbles that reached the outer air-water interface contained no (1)O(2). The mechanism by which (1)O(2) deactivated organisms was explored through the addition of detergent molecules and Ca(2+) ions. Results indicate that the preferential accumulation of E. coli at the air-water interface of the bubble leads to enhanced toxicity of bubbles containing (1)O(2). The singlet oxygen device offers intriguing possibilities for creating new types of disinfection strategies based on photodynamic ((1)O(2)) bubble carriers.
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Affiliation(s)
- Dorota Bartusik
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 11210, United States
| | - David Aebisher
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 11210, United States
| | - Alan Lyons
- Department of Chemistry, College of Staten Island, City University of New York, Staten Island, New York 10314, United States
| | - Alexander Greer
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 11210, United States
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Saint-Cricq P, Pigot T, Blanc S, Lacombe S. Selective oxidation with nanoporous silica supported sensitizers: an environment friendly process using air and visible light. JOURNAL OF HAZARDOUS MATERIALS 2012; 211-212:266-274. [PMID: 22019105 DOI: 10.1016/j.jhazmat.2011.09.066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Revised: 09/06/2011] [Accepted: 09/16/2011] [Indexed: 05/31/2023]
Abstract
Transparent and porous silica xerogels containing various grafted photosensitizers (PSs) such as anthraquinone derivatives, Neutral Red, Acridine Yellow and a laboratory-made dicyano aromatics (DBTP) were prepared. In most cases, the xerogels were shown to be mainly microporous by porosimetry. The PSs were characterized in the powdered monoliths (form, aggregation, concentration) by electronic spectroscopy which also proved to be a useful tool for monitoring the material evolution after irradiation. These nanoporous xerogels were used as microreactors for gas/solid solvent-free photo-oxygenation of dimethylsulfide (DMS) using visible light and air as the sole reactant. All these PSs containing monoliths were efficient for gas-solid DMS oxidation, leading to sulfoxide and sulfone in varying ratios. As these polar oxidation products remained strongly adsorbed on the silica matrix, the gaseous flow at the outlet of the reactor was totally free of sulfide and odorless. The best results in term of yield and initial rate of degradation of DMS were obtained with DBTP containing xerogels. Moreover, as these materials were reusable without loss of efficiency and sensitizer photobleaching after a washing regeneration step, the concept of recyclable sensitizing materials was approved, opening the way to green process.
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Affiliation(s)
- Philippe Saint-Cricq
- Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux, Université de Pau et des Pays de l'Adour, Hélioparc-2 Av. du Président Angot, F-64053 Pau Cedex 09, France
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Robertson PKJ, Robertson JMC, Bahnemann DW. Removal of microorganisms and their chemical metabolites from water using semiconductor photocatalysis. JOURNAL OF HAZARDOUS MATERIALS 2012; 211-212:161-171. [PMID: 22178373 DOI: 10.1016/j.jhazmat.2011.11.058] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Revised: 11/16/2011] [Accepted: 11/17/2011] [Indexed: 05/27/2023]
Abstract
Semiconductor photocatalysis has been applied to the remediation of an extensive range of chemical pollutants in water over the past 30 years. The application of this versatile technology for removal of micro-organisms and cyanotoxins has recently become an area that has also been the subject of extensive research particularly over the past decade. This paper considers recent research in the application of semiconductor photocatalysis for the treatment of water contaminated with pathogenic micro-organisms and cyanotoxins. The basic processes involved in photocatalysis are described and examples of recent research into the use of photocatalysis for the removal of a range of microorganisms are detailed. The paper concludes with a review of the key research on the application of this process for the removal of chemical metabolites generated from cyanobacteria.
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Affiliation(s)
- Peter K J Robertson
- IDeaS, Innovation, Design and Sustainability Research Institute, Robert Gordon University, Schoolhill, Aberdeen, AB10 1FR, UK.
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Bartusik D, Aebisher D, Ghafari B, Lyons AM, Greer A. Generating singlet oxygen bubbles: a new mechanism for gas-liquid oxidations in water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:3053-60. [PMID: 22260325 PMCID: PMC3329934 DOI: 10.1021/la204583v] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Laser-coupled microphotoreactors were developed to bubble singlet oxygen [(1)O(2) ((1)Δ(g))] into an aqueous solution containing an oxidizable compound. The reactors consisted of custom-modified SMA fiberoptic receptacles loaded with 150 μm silicon phthalocyanine glass sensitizer particles, where the particles were isolated from direct contact with water by a membrane adhesively bonded to the bottom of each device. A tube fed O(2) gas to the reactor chambers. In the presence of O(2), singlet oxygen was generated by illuminating the sensitizer particles with 669 nm light from an optical fiber coupled to the top of the reactor. The generated (1)O(2) was transported through the membrane by the O(2) stream and formed bubbles in solution. In solution, singlet oxygen reacted with probe compounds (9,10-anthracene dipropionate dianion, trans-2-methyl-2-pentanoate anion, N-benzoyl-D,L-methionine, or N-acetyl-D,L-methionine) to give oxidized products in two stages. The early stage was rapid and showed that (1)O(2) transfer occurred via bubbles mainly in the bulk water solution. The later stage was slow; it arose only from (1)O(2)-probe molecule contact at the gas/liquid interface. A mechanism is proposed that involves (1)O(2) mass transfer and solvation, where smaller bubbles provide better penetration of (1)O(2) into the flowing stream due to higher surface-to-volume contact between the probe molecules and (1)O(2).
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Affiliation(s)
- Dorota Bartusik
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 11210
| | - David Aebisher
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 11210
| | - BiBi Ghafari
- Department of Chemistry, College of Staten Island, City University of New York, Staten Island, New York 10314
| | - Alan M. Lyons
- Department of Chemistry, College of Staten Island, City University of New York, Staten Island, New York 10314
| | - Alexander Greer
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 11210
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