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Chapron D, Michel JP, Fontaine P, Godard J, Brégier F, Sol V, Rosilio V. Thermodynamic and structural properties of lipid-photosensitizer conjugates mixed with phospholipids: Impact on the formation and stability of nano-assemblies. Colloids Surf B Biointerfaces 2023; 231:113565. [PMID: 37778109 DOI: 10.1016/j.colsurfb.2023.113565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 09/21/2023] [Accepted: 09/23/2023] [Indexed: 10/03/2023]
Abstract
The photosensitizer Phenalenone (PN) was grafted with one or two lipid (C18) chains to form pure nano-assemblies or mixed lipid vesicles suitable for photodynamic therapy. Mixtures of PN-C18 conjugates with stearoyl-oleoyl phosphatidylcholine (SOPC) form vesicles that disintegrate into bilayer sheets as the concentration of PN-C18 conjugates increases. We hypothesized that PN-C18 conjugates control the thermodynamic and structural properties of the mixtures and induce the disintegration of vesicles due to PN π-π-interactions. Monolayers were analyzed by surface pressure and grazing incidence X-ray diffraction (GIXD) measurements, and vesicles by differential scanning calorimetry and cryo-TEM. The results showed that PN-triazole-C18 (1A) and PN-NH-C18 (1B) segregate from the phospholipid domains. PN-(C18)2 (conjugate 2) develops favorable interactions with SOPC and distearoyl-phosphatidylcholine (DSPC). GIXD demonstrates the contribution of SOPC to the structuring of conjugate 2 and the role of the major component in controlling the structural properties of DSPC-conjugate 2 mixtures. Above 10 mol% conjugate 2 in SOPC vesicles, the coexistence of domains with different molecule packing leads to conjugate segregation, vesicle deformation, and the formation of small bilayer discs stabilized by the inter-bilayer π-π stacking of PN molecules.
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Affiliation(s)
- David Chapron
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 17 avenue des Sciences, F-91400 Orsay, France; CNRS, GDR 2025 HappyBio, Université d'Orléans, 14 rue d'Issoudun, BP 6744, 45067 Orléans cedex 2, France
| | - Jean-Philippe Michel
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 17 avenue des Sciences, F-91400 Orsay, France; CNRS, GDR 2025 HappyBio, Université d'Orléans, 14 rue d'Issoudun, BP 6744, 45067 Orléans cedex 2, France
| | - Philippe Fontaine
- Synchrotron SOLEIL, L'Orme des Merisiers, Départementale 128, 91190 Saint-Aubin, France
| | - Jérémy Godard
- Univ. Limoges, LABCiS, UR 22722, 123 avenue Albert Thomas, F-87000, Limoges, France
| | - Frédérique Brégier
- Univ. Limoges, LABCiS, UR 22722, 123 avenue Albert Thomas, F-87000, Limoges, France; CNRS, GDR 2025 HappyBio, Université d'Orléans, 14 rue d'Issoudun, BP 6744, 45067 Orléans cedex 2, France
| | - Vincent Sol
- Univ. Limoges, LABCiS, UR 22722, 123 avenue Albert Thomas, F-87000, Limoges, France; CNRS, GDR 2025 HappyBio, Université d'Orléans, 14 rue d'Issoudun, BP 6744, 45067 Orléans cedex 2, France
| | - Véronique Rosilio
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 17 avenue des Sciences, F-91400 Orsay, France; CNRS, GDR 2025 HappyBio, Université d'Orléans, 14 rue d'Issoudun, BP 6744, 45067 Orléans cedex 2, France.
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2
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Kolarikova M, Hosikova B, Dilenko H, Barton-Tomankova K, Valkova L, Bajgar R, Malina L, Kolarova H. Photodynamic therapy: Innovative approaches for antibacterial and anticancer treatments. Med Res Rev 2023. [PMID: 36757198 DOI: 10.1002/med.21935] [Citation(s) in RCA: 52] [Impact Index Per Article: 52.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 12/07/2022] [Accepted: 01/03/2023] [Indexed: 02/10/2023]
Abstract
Photodynamic therapy is an alternative treatment mainly for cancer but also for bacterial infections. This treatment dates back to 1900 when a German medical school graduate Oscar Raab found a photodynamic effect while doing research for his doctoral dissertation with Professor Hermann von Tappeiner. Unexpectedly, Raab revealed that the toxicity of acridine on paramecium depends on the intensity of light in his laboratory. Photodynamic therapy is therefore based on the administration of a photosensitizer with subsequent light irradiation within the absorption maxima of this substance followed by reactive oxygen species formation and finally cell death. Although this treatment is not a novelty, there is an endeavor for various modifications to the therapy. For example, selectivity and efficiency of the photosensitizer, as well as irradiation with various types of light sources are still being modified to improve final results of the photodynamic therapy. The main aim of this review is to summarize anticancer and antibacterial modifications, namely various compounds, approaches, and techniques, to enhance the effectiveness of photodynamic therapy.
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Affiliation(s)
- Marketa Kolarikova
- Department of Biophysics, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech Republic
| | - Barbora Hosikova
- Department of Biophysics, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech Republic
| | - Hanna Dilenko
- Department of Biophysics, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech Republic
| | - Katerina Barton-Tomankova
- Department of Biophysics, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech Republic
| | - Lucie Valkova
- Department of Biophysics, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech Republic
| | - Robert Bajgar
- Department of Biophysics, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech Republic
| | - Lukas Malina
- Department of Biophysics, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech Republic
| | - Hana Kolarova
- Department of Biophysics, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech Republic
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3
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Miretti M, Juri L, Peralta A, Cosiansi MC, Baumgartner MT, Tempesti TC. Photoinactivation of non-tuberculous mycobacteria using Zn-phthalocyanine loaded into liposomes. Tuberculosis (Edinb) 2022; 136:102247. [PMID: 35977438 DOI: 10.1016/j.tube.2022.102247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 07/26/2022] [Accepted: 08/05/2022] [Indexed: 10/15/2022]
Abstract
Non-tuberculous mycobacteria are a heterogeneous group of environmental bacteria and other than the well-known Mycobacterium tuberculosis complex and Mycobacterium leprae. They could cause localized or disseminated infections. Mycobacterium chelonae and Mycobacterium fortuitum are among the most clinically relevant non-tuberculous mycobacteria species. The infections treatment is complex since they are resistant to antituberculosis drugs and the biofilm formation makes them impermeable to several antibiotics. Antimicrobial photodynamic therapy (aPDT) constitutes an alternative to eliminate pathogens, principally those antimicrobials resistant. Among explored photosensitizers, phthalocyanines are considered excellent, but with a disadvantage: a lack solubility in aqueous media. Consequently, several nanocarriers have been studied in the last years. In this work, a Zn-phthalocyanine into liposomes was evaluated to photoinactivate M. fortuitum and M. chelonae. The results show a higher photodynamic activity of ZnPc into liposomes respect to solution. Furthermore, M. fortuitum was more sensible to aPDT than M. chelonae.
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Affiliation(s)
- Mariana Miretti
- INFIQC (CONICET), Dpto. de Química Orgánica, Universidad Nacional de Córdoba, Ciudad Universitaria s/n, Córdoba, 5000, Córdoba, Argentina.
| | - Leticia Juri
- Laboratorio Regional de Tuberculosis, Hospital Transito Cáceres de Allende, Córdoba, 5000, Córdoba, Argentina
| | - Alejandra Peralta
- Laboratorio Regional de Tuberculosis, Hospital Transito Cáceres de Allende, Córdoba, 5000, Córdoba, Argentina
| | - María C Cosiansi
- Laboratorio Regional de Tuberculosis, Hospital Transito Cáceres de Allende, Córdoba, 5000, Córdoba, Argentina
| | - María T Baumgartner
- INFIQC (CONICET), Dpto. de Química Orgánica, Universidad Nacional de Córdoba, Ciudad Universitaria s/n, Córdoba, 5000, Córdoba, Argentina
| | - Tomas C Tempesti
- INFIQC (CONICET), Dpto. de Química Orgánica, Universidad Nacional de Córdoba, Ciudad Universitaria s/n, Córdoba, 5000, Córdoba, Argentina.
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4
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Yasin G, Nasr M, Abdel Gaber SA, Hüttenberger D, Fadel M. Response surface methodological approach for optimization of photodynamic therapy of onychomycosis using chlorin e6 loaded nail penetration enhancer vesicles. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2022; 232:112461. [PMID: 35551052 DOI: 10.1016/j.jphotobiol.2022.112461] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 11/07/2021] [Accepted: 05/02/2022] [Indexed: 06/15/2023]
Abstract
Antimicrobial photodynamic inactivation (aPDI) has a tremendous potential as an alternative therapeutic modality to conventional antifungals in treatment of onychomycosis, yet the nail barrier properties and the deep-seated nature of fungi within the nails remain challenging. Therefore, the aim of this study was to prepare, optimize, and characterize Chorin e6 (Ce6) nail penetration enhancer containing vesicles (Ce6-nPEVs) and evaluate their photodynamic mediated effect against Trichophyton rubrum (T.rubrum); the main causative agent of onychomycosis. Optimization of the particle size and encapsulation efficiency of nPEVs was performed using a four-factor two-level full factorial design. The transungual delivery potential of the selected formulation was assessed in comparison with the free drug. The photodynamic treatment conditions for T.rubrum aPDI by free Ce6 was optimized using response surface methodology based on Box-Behnken design, and the aPDI effect of the selected Ce6-nPEVs was evaluated versus the free Ce6 at the optimized condition. Results showed that formulations exhibited high encapsulation efficiency for Ce6 ranging from 79.4 to 98%, particle sizes ranging from 225 to 859 nm, positive zeta potential values ranging from +30 to +70 mV, and viscosity ranging from 1.26 to 3.43 cP. The predominant parameters for maximizing the encapsulation efficiency and minimizing the particle size of Ce6-nPEVs were identified. The selected formulation showed 1.8-folds higher nail hydration and 2.3 folds improvement in percentage of Ce6 up-taken by nails compared to the free drug. Results of the microbiological study confirmed the reliability and adequacy of the Box-Behnken model, and delineated Ce6 concentration and incubation time as the significant model terms. Free Ce6 and Ce6-nPEVs showed an equipotent in vitro fungicidal effect on T.rubrum at the optimized conditions, however Ce6-nPEVs is expected to show a differential effect at the in vivo level where the advantage of the enhanced nail penetration feature will be demonstrated.
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Affiliation(s)
- Ghada Yasin
- Pharmaceutical Nano-Technology Laboratory, Department of Medical Applications of Laser, National Institute of Laser Enhanced Sciences (NILES), Cairo University, Cairo, Egypt
| | - Maha Nasr
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Sara A Abdel Gaber
- Nanomedicine Department, Institute of Nanoscience and Nanotechnology, Kafrelsheikh University, Kafrelsheikh, Egypt
| | | | - Maha Fadel
- Pharmaceutical Nano-Technology Laboratory, Department of Medical Applications of Laser, National Institute of Laser Enhanced Sciences (NILES), Cairo University, Cairo, Egypt.
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5
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Delcanale P, Abbruzzetti S, Viappiani C. Photodynamic treatment of pathogens. LA RIVISTA DEL NUOVO CIMENTO 2022; 45:407-459. [PMCID: PMC8921710 DOI: 10.1007/s40766-022-00031-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Accepted: 01/10/2022] [Indexed: 06/01/2023]
Abstract
The current viral pandemic has highlighted the compelling need for effective and versatile treatments, that can be quickly tuned to tackle new threats, and are robust against mutations. Development of such treatments is made even more urgent in view of the decreasing effectiveness of current antibiotics, that makes microbial infections the next emerging global threat. Photodynamic effect is one such method. It relies on physical processes proceeding from excited states of particular organic molecules, called photosensitizers, generated upon absorption of visible or near infrared light. The excited states of these molecules, tailored to undergo efficient intersystem crossing, interact with molecular oxygen and generate short lived reactive oxygen species (ROS), mostly singlet oxygen. These species are highly cytotoxic through non-specific oxidation reactions and constitute the basis of the treatment. In spite of the apparent simplicity of the principle, the method still has to face important challenges. For instance, the short lifetime of ROS means that the photosensitizer must reach the target within a few tens nanometers, which requires proper molecular engineering at the nanoscale level. Photoactive nanostructures thus engineered should ideally comprise a functionality that turns the system into a theranostic means, for instance, through introduction of fluorophores suitable for nanoscopy. We discuss the principles of the method and the current molecular strategies that have been and still are being explored in antimicrobial and antiviral photodynamic treatment.
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Affiliation(s)
- Pietro Delcanale
- Dipartimento di Scienze Matematiche, Fisiche e Informatiche, Università degli Studi di Parma, Parco Area delle Scienze 7A, 43124 Parma, Italy
| | - Stefania Abbruzzetti
- Dipartimento di Scienze Matematiche, Fisiche e Informatiche, Università degli Studi di Parma, Parco Area delle Scienze 7A, 43124 Parma, Italy
| | - Cristiano Viappiani
- Dipartimento di Scienze Matematiche, Fisiche e Informatiche, Università degli Studi di Parma, Parco Area delle Scienze 7A, 43124 Parma, Italy
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6
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Silvestre ALP, Di Filippo LD, Besegato JF, de Annunzio SR, Almeida Furquim de Camargo B, de Melo PBG, Rastelli ANDS, Fontana CR, Chorilli M. Current applications of drug delivery nanosystems associated with antimicrobial photodynamic therapy for oral infections. Int J Pharm 2021; 592:120078. [DOI: 10.1016/j.ijpharm.2020.120078] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 10/26/2020] [Accepted: 11/08/2020] [Indexed: 12/26/2022]
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Diogo P, F Faustino MA, P M S Neves MG, Palma PJ, P Baptista I, Gonçalves T, Santos JM. An Insight into Advanced Approaches for Photosensitizer Optimization in Endodontics-A Critical Review. J Funct Biomater 2019; 10:E44. [PMID: 31575005 PMCID: PMC6963755 DOI: 10.3390/jfb10040044] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 09/10/2019] [Accepted: 09/23/2019] [Indexed: 02/07/2023] Open
Abstract
Apical periodontitis is a biofilm-mediated disease; therefore, an antimicrobial approach is essential to cure or prevent its development. In the quest for efficient strategies to achieve this objective, antimicrobial photodynamic therapy (aPDT) has emerged as an alternative to classical endodontic irrigation solutions and antibiotics. The aim of the present critical review is to summarize the available evidence on photosensitizers (PSs) which has been confirmed in numerous studies from diverse areas combined with several antimicrobial strategies, as well as emerging options in order to optimize their properties and effects that might be translational and useful in the near future in basic endodontic research. Published data notably support the need for continuing the search for an ideal endodontic photosensitizer, that is, one which acts as an excellent antimicrobial agent without causing toxicity to the human host cells or presenting the risk of tooth discoloration. The current literature on experimental studies mainly relies on assessment of mixed disinfection protocols, combining approaches which are already available with aPDT as an adjunct therapy. In this review, several approaches concerning aPDT efficiency are appraised, such as the use of bacteriophages, biopolymers, drug and light delivery systems, efflux pump inhibitors, negative pressure systems, and peptides. The authors also analyzed their combination with other approaches for aPDT improvement, such as sonodynamic therapy. All of the aforementioned techniques have already been tested, and we highlight the biological challenges of each formulation, predicting that the collected information may encourage the development of other effective photoactive materials, in addition to being useful in endodontic basic research. Moreover, special attention is dedicated to studies on detailed conditions, aPDT features with a focus on PS enhancer strategies, and the respective final antimicrobial outcomes. From all the mentioned approaches, the two which are most widely discussed and which show the most promising outcomes for endodontic purposes are drug delivery systems (with strong development in nanoparticles) and PS solubilizers.
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Affiliation(s)
- Patrícia Diogo
- Institute of Endodontics, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal.
- FMUC, Faculty of Medicine, University of Coimbra, 3000-370 Coimbra, Portugal.
| | - M Amparo F Faustino
- QOPNA & LAQV-REQUIMTE and Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - M Graça P M S Neves
- QOPNA & LAQV-REQUIMTE and Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Paulo J Palma
- Institute of Endodontics, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal.
- FMUC, Faculty of Medicine, University of Coimbra, 3000-370 Coimbra, Portugal.
| | - Isabel P Baptista
- FMUC, Faculty of Medicine, University of Coimbra, 3000-370 Coimbra, Portugal.
- Institute of Periodontology, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal.
| | - Teresa Gonçalves
- FMUC, Faculty of Medicine, University of Coimbra, 3000-370 Coimbra, Portugal.
- CNC, Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.
| | - João Miguel Santos
- Institute of Endodontics, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal.
- FMUC, Faculty of Medicine, University of Coimbra, 3000-370 Coimbra, Portugal.
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Miretti M, Juri L, Cosiansi MC, Tempesti TC, Baumgartner MT. Antimicrobial Effects of ZnPc Delivered into Liposomes on Multidrug Resistant (MDR)‐
Mycobacterium tuberculosis. ChemistrySelect 2019. [DOI: 10.1002/slct.201902039] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Mariana Miretti
- INFIQC (CONICET). Dpto. de Química OrgánicaFacultad de Ciencias QuímicasUniversidad Nacional de Córdoba. Ciudad Universitaria s/n, Córdoba 5000) Córdoba Argentina
| | - Leticia Juri
- Laboratorio Regional de TuberculosisHospital Transito Cáceres de Allende. Córdoba 5000) Córdoba Argentina
| | - María C. Cosiansi
- Laboratorio Regional de TuberculosisHospital Transito Cáceres de Allende. Córdoba 5000) Córdoba Argentina
| | - Tomas C. Tempesti
- INFIQC (CONICET). Dpto. de Química OrgánicaFacultad de Ciencias QuímicasUniversidad Nacional de Córdoba. Ciudad Universitaria s/n, Córdoba 5000) Córdoba Argentina
| | - María T. Baumgartner
- INFIQC (CONICET). Dpto. de Química OrgánicaFacultad de Ciencias QuímicasUniversidad Nacional de Córdoba. Ciudad Universitaria s/n, Córdoba 5000) Córdoba Argentina
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9
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Aggarwal A, Samaroo D, Jovanovic IR, Singh S, Tuz MP, Mackiewicz MR. Porphyrinoid-based photosensitizers for diagnostic and therapeutic applications: An update. J PORPHYR PHTHALOCYA 2019. [DOI: 10.1142/s1088424619300118] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Porphyrin-based molecules are actively studied as dual function theranostics: fluorescence-based imaging for diagnostics and fluorescence-guided therapeutic treatment of cancers. The intrinsic fluorescent and photodynamic properties of the bimodal molecules allows for these theranostic approaches. Several porphyrinoids bearing both hydrophilic and/or hydrophobic units at their periphery have been developed for the aforementioned applications, but better tumor selectivity and high efficacy to destroy tumor cells is always a key setback for their use. Another issue related to their effective clinical use is that, most of these chromophores form aggregates under physiological conditions. Nanomaterials that are known to possess incredible properties that cannot be achieved from their bulk systems can serve as carriers for these chromophores. Porphyrinoids, when conjugated with nanomaterials, can be enabled to perform as multifunctional nanomedicine devices. The integrated properties of these porphyrinoid-nanomaterial conjugated systems make them useful for selective drug delivery, theranostic capabilities, and multimodal bioimaging. This review highlights the use of porphyrins, chlorins, bacteriochlorins, phthalocyanines and naphthalocyanines as well as their multifunctional nanodevices in various biomedical theranostic platforms.
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Affiliation(s)
- Amit Aggarwal
- LaGuardia Community College, 31-10 Thomson Ave., Long Island City, NY 11101, USA
| | - Diana Samaroo
- New York City College of Technology, Department of Chemistry, 285 Jay Street, Brooklyn, NY 11201, USA
- Graduate Center, 365 5th Ave, New York, NY 10016, USA
| | | | - Sunaina Singh
- LaGuardia Community College, 31-10 Thomson Ave., Long Island City, NY 11101, USA
| | - Michelle Paola Tuz
- LaGuardia Community College, 31-10 Thomson Ave., Long Island City, NY 11101, USA
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Li D, Chen S, Dou H, Wu W, Liu Q, Zhang L, Shen Y, Shu G, Yuan Z, Lin J, Zhang W, Peng G, Zhong Z, Yin L, Fu H. Preparation of cefquinome sulfate cationic proliposome and evaluation of its efficacy on Staphylococcus aureus biofilm. Colloids Surf B Biointerfaces 2019; 182:110323. [PMID: 31323449 DOI: 10.1016/j.colsurfb.2019.06.053] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 06/09/2019] [Accepted: 06/24/2019] [Indexed: 12/16/2022]
Abstract
Staphylococcus aureus (S. aureus) has the propensity to form biofilms, which eventually cause antibiotic resistance and treatment failure. Cefquinome sulfate (CS) is an animal-specific antibacterial agent for S. aureus infection. In this work, CS cationic proliposomes (CSCPs) were prepared by solid-dispersion method combined with effervescent hydration to eradicate bacterial biofilm and improve the antibacterial effect of the drug. CSCPs were readily dispersed in water, thereby forming CS cationic liposomes (CSCLs) as a white, uniform suspension. The CSCLs had an encapsulation efficiency (EE) of 63.21%, a drug loading of 4.04%, an average particle size of 201.5 nm, and a positive zeta-potential of 65.29 mV. In vitro release studies showed that CSCLs had good sustained-release behavior. The CS and CSCL minimal inhibitory concentration (MIC) of S. aureus type culture strain were 1 and 0.48 g/mL, respectively. The eradication effect of CS on bacterial biofilm (BBF) was relatively weak during culture in drug-containing medium for 8 h-24 h. However, the CSCL eradication effect on BBF increased gradually, and the clearance rate of CSCLs on BBF was about twice that of CS. The clearance rate reached 81.30% with 2.5 × MIC in 24 h. All these results indicated that CSCLs can significantly improve the eradication effect of cefquinome on biofilm to inhibit bacterial growth.
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Affiliation(s)
- Dongbo Li
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Shiqi Chen
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Haibo Dou
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Wenbin Wu
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Quanjin Liu
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Li Zhang
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yun Shen
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Gang Shu
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zhixiang Yuan
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Juchun Lin
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Wei Zhang
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Guangneng Peng
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zhijun Zhong
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Lizi Yin
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Hualin Fu
- Innovative Engineering Research Center of Veterinary Pharmaceutics, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China.
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11
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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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Vimaladevi M, Divya KC, Girigoswami A. Liposomal nanoformulations of rhodamine for targeted photodynamic inactivation of multidrug resistant gram negative bacteria in sewage treatment plant. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 162:146-152. [PMID: 27371913 DOI: 10.1016/j.jphotobiol.2016.06.034] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 06/20/2016] [Indexed: 12/24/2022]
Abstract
The antimicrobial photodynamic therapy is an alternative method for killing bacterial cells in view of the rising problem of antibiotic resistance microorganisms. The present study examined the effect of a water soluble photosensitizer, Rhodamine 6G (R6G) in stealth liposomes on multidrug resistant Pseudomonas aeruginosa in the presence of visible light. Liposomes were prepared with cholesterol and phospholipids that extracted from hen eggs in a cost effective way and characterized by light microscopy, particle size analyzer, electron microscopy, steady state spectrophotometry and spectrofluorometry. The photoefficacies of R6G in polymer encapsulated liposomes and positively charged liposomes are much higher compared to the free R6G (R6G in water) in terms of singlet oxygen quantum yield. This high potential of producing more reactive oxygen species (ROS) by liposomal nanoformulated R6G leads to efficient photodynamic inactivation of multidrug resistant gram negative bacteria in waste water. Though the singlet oxygen quantum yield of polymer coated liposomal R6G was higher than the cationic liposomal formulation, a faster decrease in bacterial survival was observed for positively charged liposomal R6G treated bacteria due to electrostatic charge interactions. Therefore, it can be concluded that the positively charged liposomal nanoformulations of laser dyes are efficient for photodynamic inactivation of multiple drug resistant gram negative microorganisms.
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Affiliation(s)
- Mohan Vimaladevi
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute (CHRI), Chettinad Academy of Research & Education (CARE), Kelambakkam, Chennai 603 103, India; Biological Materials Laboratory, Central Leather Research Institute (CLRI), Adyar, Chennai 600 020, India
| | - Kurunchi Chellapathi Divya
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute (CHRI), Chettinad Academy of Research & Education (CARE), Kelambakkam, Chennai 603 103, India
| | - Agnishwar Girigoswami
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute (CHRI), Chettinad Academy of Research & Education (CARE), Kelambakkam, Chennai 603 103, India.
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Abstract
As our knowledge of host-microbial interactions within the oral cavity increases, future treatments are likely to be more targeted. For example, efforts to target a single species or key virulence factors that they produce, while maintaining the natural balance of the resident oral microbiota that acts to modulate the host immune response would be an advantage. Targeted approaches may be directed at the black-pigmented anaerobes, Porphyromonas gingivalis and Prevotella intermedia, associated with periodontitis. Such pigments provide an opportunity for targeted phototherapy with high-intensity monochromatic light. Functional inhibition approaches, including the use of enzyme inhibitors, are also being explored to control periodontitis. More general disruption of dental plaque through the use of enzymes and detergents, alone and in combination, shows much promise. The use of probiotics and prebiotics to improve gastrointestinal health has now led to an interest in using these approaches to control oral disease. More recently the potential of antimicrobial peptides and nanotechnology, through the application of nanoparticles with biocidal, anti-adhesive and delivery capabilities, has been explored. The aim of this review is to consider the current status as regards non-conventional treatment approaches for oral infections with particular emphasis on the plaque-related diseases.
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Affiliation(s)
- Robert P Allaker
- a Oral Microbiology; Barts and The London School of Medicine & Dentistry; Queen Mary University of London ; London, UK
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