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Kuryanova AS, Savko MA, Kaplin VS, Aksenova NA, Timofeeva VA, Chernyak AV, Glagolev NN, Timashev PS, Solovieva AB. Effect of Chitosan and Amphiphilic Polymers on the Photosensitizing and Spectral Properties of Rose Bengal. Molecules 2022; 27:molecules27206796. [PMID: 36296390 PMCID: PMC9607003 DOI: 10.3390/molecules27206796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/08/2022] [Accepted: 10/08/2022] [Indexed: 11/23/2022] Open
Abstract
The influence of chitosan (CS) and amphiphilic polymers (AP: pluronic F108 and polyvinylpyrrolidone (PVP)) on the photocatalytic activity of rose bengal (RB) in a model reaction of tryptophan photo-oxidation in phosphate-buffered saline (PBS) was studied. It was shown that in the presence of CS, the effective rate constant keff of tryptophan photo-oxidation catalyzed by RB in PBS solution decreases by a factor of two. This is due to the ionic interaction of the RB with the chitosan. Rose bengal in a slightly acidic environment (pH 4.5) passes into a neutral lactone form, which sharply reduces the photosensitizing properties of the dye. It was demonstrated that the introduction of AP into a solution containing RB and CS prevents direct interaction between RB and CS. This is evidenced by the presence of photocatalytic activity of the dye in the RB-AP-CS systems, as well as bathochromic shifts of the main absorption bands of the dye, and an increase in the optical density and luminescence intensity of the RB when AP is introduced into a buffer solution containing RB and chitosan. The presence of RB-CS and RB-AP interaction in aqueous and PBS media is confirmed by the increase in the degree of fluorescence anisotropy (r) of these binary systems. In an aqueous solution, the value of r for the RB-F108-CS system decreases by a factor of 3.5 (compared to the value of r for the RB-CS system), which is associated with the localization of the dye in pluronic micelles. In PBS, the fluorescence anisotropy is practically the same for all systems, which is related to the stability of the dye structure in this medium. The presence of interaction between RB and AP in aqueous solutions was confirmed by the proton NMR method. In addition, the formation of RB-F108 macromolecular complexes, which form associates during solution concentration (in particular, during evaporation), was shown by AFM. Such RB-AP-CS systems may be promising for practical application in the treatment of local foci of infections by aPDT.
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Affiliation(s)
- Anastasia S. Kuryanova
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Kosygina St. 4, 119991 Moscow, Russia
- Correspondence:
| | - Marina A. Savko
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Kosygina St. 4, 119991 Moscow, Russia
| | - Vladislav S. Kaplin
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Kosygina St. 4, 119991 Moscow, Russia
| | - Nadezhda A. Aksenova
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Kosygina St. 4, 119991 Moscow, Russia
- Institute for Regenerative Medicine, Sechenov University, Trubetskaya St. 8-2, 119991 Moscow, Russia
| | - Victoria A. Timofeeva
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Kosygina St. 4, 119991 Moscow, Russia
| | - Aleksandr V. Chernyak
- Federal Research Center of Problem of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Ac. Semenov Avenue 1, 142432 Chernogolovka, Russia
| | - Nicolay N. Glagolev
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Kosygina St. 4, 119991 Moscow, Russia
| | - Petr S. Timashev
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Kosygina St. 4, 119991 Moscow, Russia
- Institute for Regenerative Medicine, Sechenov University, Trubetskaya St. 8-2, 119991 Moscow, Russia
- World-Class Research Center “Digital Biodesign and Personalized Healthcare”, Sechenov First Moscow State Medical University, Trubetskaya St. 8-2, 119991 Moscow, Russia
- Chemistry Department, Lomonosov Moscow State University, Leninskiye Gory 1-3, 119991 Moscow, Russia
| | - Anna B. Solovieva
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Kosygina St. 4, 119991 Moscow, Russia
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Huang J, Jacobsen J, Genina N, Larsen SW, Nielsen HM, Müllertz A, Mu H. Investigating the effect of graphene oxide in chitosan/alginate-based foams on the release and antifungal activity of clotrimazole in vitro. Eur J Pharm Sci 2022; 174:106204. [PMID: 35550171 DOI: 10.1016/j.ejps.2022.106204] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 05/03/2022] [Accepted: 05/08/2022] [Indexed: 12/14/2022]
Abstract
Polyelectrolyte complexes (PECs) have been used as the matrix of solid foams for drug delivery. This study aimed at investigating the effect of graphene oxide (GO) and the composition of excipients in chitosan/alginate-based buccal foams on the clotrimazole release and antifungal activities. The investigation has been focused on the interactions of the drug with excipients in the foams, and the changes of ionization degree upon exposure to various media are discussed. The solid foams were prepared by mixing the excipients and clotrimazole via probe sonication, followed by a freeze-drying method. The pH values of the formulations were measured during the foam preparation process to estimate the ionization degree of clotrimazole and the other excipients. The foam matrix was the PECs between the cationic chitosan and anionic alginate. The mechanical strength of clotrimazole-loaded foams was lower than that of drug-free foams due to the positively charged clotrimazole interacting with the anionic alginate and interfering the PECs between chitosan and alginate. Addition of GO in the clotrimazole-loaded matrix made the foams mechanically stronger and contributed to a faster release of clotrimazole from the buccal foams by disrupting the electrostatic interactions between alginate and clotrimazole. However, addition of 1 wt% GO in the formulations didn't affect the antifungal activity of clotrimazole-loaded foams significantly. A lower amount GO in the formulation may be required for enhancing the antifungal effect, which should be further investigated in future.
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Affiliation(s)
- J Huang
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - J Jacobsen
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - N Genina
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - S W Larsen
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - H M Nielsen
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - A Müllertz
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - H Mu
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark.
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Dias LD, Blanco KC, Mfouo-Tynga IS, Inada NM, Bagnato VS. Curcumin as a photosensitizer: From molecular structure to recent advances in antimicrobial photodynamic therapy. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C: PHOTOCHEMISTRY REVIEWS 2020. [DOI: 10.1016/j.jphotochemrev.2020.100384] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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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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Morsi NM, Shamma RN, Eladawy NO, Abdelkhalek AA. Risedronate-Loaded Macroporous Gel Foam Enriched with Nanohydroxyapatite: Preparation, Characterization, and Osteogenic Activity Evaluation Using Saos-2 Cells. AAPS PharmSciTech 2019; 20:104. [PMID: 30737611 DOI: 10.1208/s12249-019-1292-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 12/26/2018] [Indexed: 12/13/2022] Open
Abstract
The application of minimally invasive surgical techniques in the field of orthopedic surgery has created a growing need for new injectable synthetic materials that can be used for bone grafting. In this work, novel injectable thermosensitive foam was developed by mixing nHAP powder with a thermosensitive polymer with foaming power (Pluronic F-127) and loaded with a water-soluble bisphosphonate drug (risedronate) to promote osteogenesis. The foam was able to retain the porous structure after injection and set through temperature change of PF-127 solution to form gel inside the body. The effect of different formulation parameters on the gelation time, porosity, foamability, injectability, and in vitro degradation in addition to drug release from the prepared foams were analyzed using a full factorial design. The addition of a co-polymer like methylcellulose or sodium alginate into the foam was also studied. Results showed that the prepared optimized thermosensitive foam was able to gel within 1 min at 37°C, and sustain the release of drug for 72 h. The optimized formulation was further tested for any interactions using DSC and IR, and revealed no interactions between the drug and the used excipients in the prepared foam. Furthermore, the ability of the pre-set foam to support osteoblastic-like Saos-2-cell proliferation and differentiation was assessed, and revealed superior function on promoting cellular proliferation as confirmed by fluorescence microscope compared to the plain drug solution. The activity of the foam treated cells was also assessed by measuring the alkaline phosphatase activity and calcium deposition, and confirmed that the cellular activity was greatly enhanced in foam treated cells compared to those treated with the plain drug solution only. The obtained results show that the prepared risedronate-loaded thermosensitive foam would represent a step forward in the design of new materials for minimally invasive bone regeneration.
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6
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Frazier SD, Aday AN, Srubar WV. On-Demand Microwave-Assisted Fabrication of Gelatin Foams. Molecules 2018; 23:molecules23051121. [PMID: 29747398 PMCID: PMC6100080 DOI: 10.3390/molecules23051121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 05/01/2018] [Accepted: 05/02/2018] [Indexed: 01/15/2023] Open
Abstract
Ultraporous gelatin foams (porosity >94%, ρ ≈ 0.039–0.056 g/cm3) have been fabricated via microwave radiation. The resulting foam structures are unique with regard to pore morphology (i.e., closed-cell) and exhibit 100% macroporosity (pore size 332 to 1700 μm), presence of an external skin, and densities similar to aerogels. Results indicate that the primary foaming mechanism is governed by the vaporization of water that is tightly bound in secondary structures (i.e., helices, β-turns, β-sheets) that are present in dehydrated gelatin films but not present in the foams after microwave radiation (700 Watts).
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Affiliation(s)
- Shane D Frazier
- Materials Science and Engineering Program, University of Colorado Boulder, Boulder, CO 80309, USA.
| | - Anastasia N Aday
- Materials Science and Engineering Program, University of Colorado Boulder, Boulder, CO 80309, USA.
| | - Wil V Srubar
- Materials Science and Engineering Program, University of Colorado Boulder, Boulder, CO 80309, USA.
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, CO 80309, USA.
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7
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Cardea S, Baldino L, Reverchon E. Comparative study of PVDF-HFP-curcumin porous structures produced by supercritical assisted processes. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2017.10.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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8
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Flores C, Lopez M, Tabary N, Neut C, Chai F, Betbeder D, Herkt C, Cazaux F, Gaucher V, Martel B, Blanchemain N. Preparation and characterization of novel chitosan and β-cyclodextrin polymer sponges for wound dressing applications. Carbohydr Polym 2017; 173:535-546. [PMID: 28732897 DOI: 10.1016/j.carbpol.2017.06.026] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 06/02/2017] [Accepted: 06/05/2017] [Indexed: 01/01/2023]
Abstract
Chitosan (CS) presents antibacterial, mucoadhesive and hemostatic properties and is an ideal candidate for wound dressing applications. This work reports the development of sponge-like materials obtained from physical hydrogels after the interaction between CS and a β-cyclodextrin polymer (PCD) in acidic conditions to provoke immediate gelation. Characterization consisted of zeta potential (ZP) measurements, rheology analysis, Fourier transform infrared (FTIR), Raman spectroscopy, wide angle X-ray scattering (WAXS) and scanning electron microscopy (SEM). Swelling behavior, cytotoxicity, drug sorption and drug delivery properties of sponges were assessed. ZP indicated that CS and PCD presented opposite charges needed for physical crosslinking. Rheology, swelling, and cytotoxicity of sponges depended on their CS:PCD weight ratios. Increasing PCD in the mixture delayed the gel time, reduced the swelling and increased the cytotoxicity. FTIR and Raman confirmed the physical crosslinking between CS and PCD through ionic interactions, and WAXS showed the amorphous state of the sponges. Finally, the efficiency of chlorhexidine loaded sponge against S. aureus bacteria was proved for up to 30days in agar diffusion tests.
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Affiliation(s)
- Claudia Flores
- Univ. Lille, Inserm, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, Lille, France
| | - Marco Lopez
- Univ. Lille, Inserm, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, Lille, France
| | - Nicolas Tabary
- Univ. Lille, CNRS, INRA, ENSCL UMR8207, UMET - Unité Matériaux et Transformations, F-59000 Lille, France
| | - Christel Neut
- Univ. Lille, Inserm, CHU Lille, U995 - LIRIC - Lille Inflammation Research International Centre, Lille, France
| | - Feng Chai
- Univ. Lille, Inserm, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, Lille, France
| | - Didier Betbeder
- Univ. Lille, Inserm, CHU Lille, U995 - LIRIC - Lille Inflammation Research International Centre, Lille, France
| | - Clément Herkt
- Univ. Lille, Inserm, CHU Lille, U995 - LIRIC - Lille Inflammation Research International Centre, Lille, France
| | - Frederic Cazaux
- Univ. Lille, CNRS, INRA, ENSCL UMR8207, UMET - Unité Matériaux et Transformations, F-59000 Lille, France
| | - Valerie Gaucher
- Univ. Lille, CNRS, INRA, ENSCL UMR8207, UMET - Unité Matériaux et Transformations, F-59000 Lille, France
| | - Bernard Martel
- Univ. Lille, CNRS, INRA, ENSCL UMR8207, UMET - Unité Matériaux et Transformations, F-59000 Lille, France
| | - Nicolas Blanchemain
- Univ. Lille, Inserm, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, Lille, France.
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Valerón Bergh VJ, Johannessen E, Andersen T, Tønnesen HH. Evaluation of porphyrin loaded dry alginate foams containing poloxamer 407 and β-cyclodextrin-derivatives intended for wound treatment. Pharm Dev Technol 2017; 23:761-770. [DOI: 10.1080/10837450.2017.1314492] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
| | - Elin Johannessen
- School of Pharmacy, Department of Pharmaceutics, University of Oslo, Oslo, Norway
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10
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No DS, Algburi A, Huynh P, Moret A, Ringard M, Comito N, Drider D, Takhistov P, Chikindas ML. Antimicrobial efficacy of curcumin nanoparticles against Listeria monocytogenes
is mediated by surface charge. J Food Saf 2017. [DOI: 10.1111/jfs.12353] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Da Som No
- School of Environmental and Biological Sciences; Rutgers State University; New Brunswick New Jersey
| | - Ammar Algburi
- School of Environmental and Biological Sciences; Rutgers State University; New Brunswick New Jersey
- Department of Microbiology; Veterinary College, Diyala University; Baqubah Iraq
| | - Phong Huynh
- School of Environmental and Biological Sciences; Rutgers State University; New Brunswick New Jersey
| | - Aubry Moret
- Institut Régional de Recherche Charles Viollette, Université Lille 1, CitéScientifique, Cedex; France
| | - Marion Ringard
- Institut Régional de Recherche Charles Viollette, Université Lille 1, CitéScientifique, Cedex; France
| | - Nicole Comito
- School of Environmental and Biological Sciences; Rutgers State University; New Brunswick New Jersey
| | - Djamel Drider
- Institut Régional de Recherche Charles Viollette, Université Lille 1, CitéScientifique, Cedex; France
| | - Paul Takhistov
- School of Environmental and Biological Sciences; Rutgers State University; New Brunswick New Jersey
| | - Michael L. Chikindas
- School of Environmental and Biological Sciences; Rutgers State University; New Brunswick New Jersey
- Center for Digestive Health; New Jersey Institute for Food, Nutrition, and Health; New Brunswick New Jersey
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11
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Nilsen-Nygaard J, Hattrem MN, Draget KI. Propylene glycol alginate (PGA) gelled foams: A systematic study of surface activity and gelling properties as a function of degree of esterification. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2016.01.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Hadi BJ, Sanagi MM, Aboul-Enein HY, Ibrahim WAW, Jamil S, Mu’azu MA. Microwave-Assisted Extraction of Methyl β-Cyclodextrin-Complexed Curcumin from Turmeric Rhizome Oleoresin. FOOD ANAL METHOD 2015. [DOI: 10.1007/s12161-015-0137-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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13
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Hassani Najafabadi A, Azodi-Deilami S, Abdouss M, Payravand H, Farzaneh S. Synthesis and evaluation of hydroponically alginate nanoparticles as novel carrier for intravenous delivery of propofol. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:145. [PMID: 25743747 DOI: 10.1007/s10856-015-5452-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Accepted: 11/29/2014] [Indexed: 06/04/2023]
Abstract
Commercial lipid emulsion of propofol (CLE) has several drawbacks including pain on injection and emulsion instability. In this paper, a novel nanocarrier system is introduced to improve stability and solubility of the poorly soluble anesthetic drug, propofol, for intravenous administration. In this paper, alginate is modified using a facile method in which the carboxylic group of alginate is grafted to octanol. The octanol-grafted alginate (Alg-C8) is then employed to prepare nanoparticles which are subsequently used for encapsulation of propofol. The nanoparticles are analyzed for their pH, osmolarity, particle size, stability, morphology and sleep recovery and the results are compared with CLE as control. It is revealed that nanoparticles have the average particle size of 180 nm ± 1.2 and spherical morphology which is less than CLE while their pH, osmolarity and profile of release of formulated nanoparticles are similar to those of CLE. In addition, the results show good chemical and physical storage stability for the nanoparticles at room temperature for at least 6 months compared to CLE as control. The animal sleep recovery test on rats shows no significant difference in time of unconsciousness and recovery of the righting reflex between nanoparticles and CLE. It is concluded that encapsulated nanoparticles introduced here could be a promising clinical intravenous system for delivery of poorly soluble anesthetic propofol. In addition, this study provides an efficient and facile method for preparing a carrier system for water insoluble drugs.
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14
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Sun Y, Du L, Liu Y, Li X, Li M, Jin Y, Qian X. Transdermal delivery of the in situ hydrogels of curcumin and its inclusion complexes of hydroxypropyl-β-cyclodextrin for melanoma treatment. Int J Pharm 2014; 469:31-9. [DOI: 10.1016/j.ijpharm.2014.04.039] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Revised: 04/05/2014] [Accepted: 04/15/2014] [Indexed: 10/25/2022]
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15
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Winter S, Tortik N, Kubin A, Krammer B, Plaetzer K. Back to the roots: photodynamic inactivation of bacteria based on water-soluble curcumin bound to polyvinylpyrrolidone as a photosensitizer. Photochem Photobiol Sci 2014; 12:1795-802. [PMID: 23828307 DOI: 10.1039/c3pp50095k] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photodynamic inactivation (PDI), the light-induced and photosensitizer-mediated overproduction of reactive oxygen species in microorganisms, represents a convincing approach to treat infections with (multi-resistant) pathogens. Due to its favourable photoactive properties combined with excellent biocompatibility, curcumin derived from the roots of turmeric (Curcuma longa) has been identified as an advantageous photosensitizer for PDI. To overcome the poor water solubility and the rapid decay of the natural substance at physiological pH, we examined the applicability of polyvinylpyrrolidone curcumin (PVP-C) in an acidified aqueous solution (solubility of PVP-C up to 2.7 mM) for photoinactivation of Gram(+) and Gram(-) bacteria. Five micromolar PVP-C incubated for 5 minutes and illuminated using a blue light LED array (435 ± 10 nm, 33.8 J cm(-2)) resulted in a >6 log10 reduction of the number of viable Staphylococcus aureus. At this concentration, longer incubation periods result in a lower phototoxicity, most likely due to degeneration of curcumin. Upon an increase of the PVP-C concentration to 50 μM (incubation for 15 or 25 min) a complete eradication of Staphylococcus aureus can be achieved. As expected for a non-cationic photosensitizer, cell wall permeabilization with CaCl2 prior to addition of 50 μM PVP-C for 15 min is necessary to induce a drop in the count of the Gram(-) Escherichia coli for more than 3 log10. As both constituents of the formulation, curcumin (E number E100) and polyvinylpyrrolidone (E1201), have been approved as food additives, a PDI based on PCP-C might allow for a very sparing clinical application (e.g. for disinfection of wounds) or even for employment in aseptic production of foodstuffs.
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Affiliation(s)
- Sandra Winter
- Laboratory of Photodynamic Inactivation of Microorganisms, Department of Materials Science and Physics, University of Salzburg, Hellbrunnerstraße 34, Salzburg, Austria.
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16
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Antibacterial activity of synthetic curcumin derivatives: 3,5-bis(benzylidene)-4-piperidone (EF24) and EF24-dimer linked via diethylenetriaminepentacetic acid (EF2DTPA). Appl Biochem Biotechnol 2014; 172:3363-73. [PMID: 24532443 DOI: 10.1007/s12010-014-0741-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 01/10/2014] [Indexed: 10/25/2022]
Abstract
Curcumin is well known for its antimicrobial and anti-inflammatory properties. However, since systemic absorption and bioavailability of curcumin from gastrointestinal tract is considerably poor, synthetic curcuminoids are being developed as better alternatives. Two curcumin derivatives: 3,5-bis(benzylidene)-4-piperidone (EF24) and EF24-dimer linked via diethylenetriaminepentacetic acid (EF2DTPA), were included in this study. We investigated the antibacterial activity of EF24 and EF2DTPA against Gram-negative (Escherichia coli) and Gram-positive (Enterococcus faecalis, Staphylococcus aureus) bacteria. We also studied the effects of EF24 and EF2DTPA on uptake and localization of pHrodo-labeled E. coli in the acidic compartments (phagolysosomes) of dendritic cells (DCs) under in vitro conditions. Our results demonstrate that treatment with EF24 and EF2DTPA directly suppresses the bacterial growth. However, these compounds do not affect the bacterial uptake or localization in the DCs.
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Ionically gelled alginate foams: Physical properties controlled by type, amount and source of gelling ions. Carbohydr Polym 2014; 99:249-56. [DOI: 10.1016/j.carbpol.2013.08.036] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Revised: 08/12/2013] [Accepted: 08/15/2013] [Indexed: 11/22/2022]
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Josef E, Bianco-Peled H. Sponges carrying self-microemulsifying drug delivery systems. Int J Pharm 2013; 458:208-17. [PMID: 24096300 DOI: 10.1016/j.ijpharm.2013.09.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 09/09/2013] [Accepted: 09/15/2013] [Indexed: 11/28/2022]
Affiliation(s)
- Elinor Josef
- Inter-Departmental Program for Biotechnology, Technion - Israel Institute of Technology, Haifa 32000, Israel; The Russell Berrie Nanotechnology Institute, Technion - Israel Institute of Technology, Haifa 32000, Israel
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Andersen T, Markussen C, Dornish M, Heier-Baardson H, Melvik JE, Alsberg E, Christensen BE. In situ gelation for cell immobilization and culture in alginate foam scaffolds. Tissue Eng Part A 2013; 20:600-10. [PMID: 24125496 DOI: 10.1089/ten.tea.2013.0223] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Essential cellular functions are often lost under culture in traditional two-dimensional (2D) systems. Therefore, biologically more realistic three-dimensional (3D) cell culture systems are needed that provide mechanical and biochemical cues which may otherwise be unavailable in 2D. For the present study, an alginate-based hydrogel system was used in which cells in an alginate solution were seeded onto dried alginate foams. A uniform distribution of NIH:3T3 and NHIK 3025 cells entrapped within the foam was achieved by in situ gelation induced by calcium ions integrated in the foam. The seeding efficiency of the cells was about 100% for cells added in a seeding solution containing 0.1-1.0% alginate compared with 18% when seeded without alginate. The NHIK 3025 cells were allowed to proliferate and form multi-cellular structures inside the transparent gel that were later vital stained and evaluated by confocal microscopy. Gels were de-gelled at different time points to isolate the multi-cellular structures and to determine the spheroid growth rate. It was also demonstrated that the mechanical properties of the gel could largely be varied through selection of type and concentration of the applied alginate and by immersing the already gelled disks in solutions providing additional gel-forming ions. Cells can efficiently be incorporated into the gel, and single cells and multi-cellular structures that may be formed inside can be retrieved without influencing cell viability or contaminating the sample with enzymes. The data show that the current system may overcome some limitations of current 3D scaffolds such as cell retrieval and in situ cell staining and imaging.
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Josef E, Barat K, Barsht I, Zilberman M, Bianco-Peled H. Composite hydrogels as a vehicle for releasing drugs with a wide range of hydrophobicities. Acta Biomater 2013; 9:8815-22. [PMID: 23816647 DOI: 10.1016/j.actbio.2013.06.028] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 05/24/2013] [Accepted: 06/19/2013] [Indexed: 10/26/2022]
Abstract
Many vitamins, bioactive lipids and over 40% of newly developed drugs are hydrophobic, and their poor water solubility limits their delivery using conventional formulations. In this work we investigated a composite gel system formulated from microemulsions embedded in alginate hydrogels, and showed that it is capable of loading several hydrophobic compounds with a wide range of aqueous solubility. All gels were clear, with no precipitations, indicating the solubility of the drugs in the gels. The release behavior was similar for different microemulsion formulations, various drugs and increasing concentrations of a drug. These findings indicate that our system could potentially act as a generic system, where the properties of the release do not depend on the drug but rather on the attributes of the gel. The structure of composite gels was investigated using small-angle scattering of X-rays and neutrons (SAXS and SANS, respectively). SANS showed more sensitivity to the structure of the microemulsion in the composite gel than SAXS did. SAXS and SANS plots of the composite gels show that both the droplets and the gel network preserve their structure when mixed together.
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Hegge AB, Vukicevic M, Bruzell E, Kristensen S, Tønnesen HH. Solid dispersions for preparation of phototoxic supersaturated solutions for antimicrobial photodynamic therapy (aPDT): Studies on curcumin and curcuminoides L. Eur J Pharm Biopharm 2012; 83:95-105. [PMID: 23085330 DOI: 10.1016/j.ejpb.2012.09.011] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 09/17/2012] [Accepted: 09/25/2012] [Indexed: 12/17/2022]
Abstract
Curcumin is under investigation as a potential photosensitizer (PS) in antimicrobial photodynamic therapy (aPDT). The therapeutic potential of curcumin as a PS is limited by its low aqueous solubility, susceptibility to hydrolytic and photolytic degradation, and limited phototoxicity toward Gram negative (G-) bacteria. Supersaturated solutions of curcumin have demonstrated high phototoxicity toward several species of Gram positive (G+) bacteria as well as the G-Escherichia (E) coli. Thus, solid dispersions that can form supersaturated solutions of curcumin upon hydration may be beneficial in aPDT. In the present study, solid dispersions of curcumin have been prepared through lyophilization of concentrated solutions obtained from dissolution of hydroxypropyl-β-cyclodextrin (HPβCD)-curcumin co-precipitates. Hydroxypropyl methylcellulose (HPMC) was added to curcumin solutions prior to lyophilization. The resulting lyophilizates were porous, amorphous and hydrated and dissolved rapidly in contact with a model physiological salt solution. The detected drug load of the lyophilizates was in the range 0.5-1.0% (w/w) and was dependent on the selected ratio between HPβCD and curcumin in the co-precipitate. The lyophilizate with the highest drug load could easily be dissolved in aqueous medium to form curcumin solutions of relevant concentrations for aPDT (i.e., 10μM). Selected solutions of the curcumin solid dispersions showed a pronounced decrease in curcumin concentration up to 90% after storage for 168h, which indicated that supersaturated curcumin solutions were initially formed upon dissolution of the lyophilizates. Both freshly prepared and 2days old solutions of one selected curcumin lyophilizate induced significant inactivation of E. coli (∼1% bacterial survival) after exposure to a light dose of only 5J/cm(2).
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Andersen T, Melvik JE, Gåserød O, Alsberg E, Christensen BE. Ionically gelled alginate foams: physical properties controlled by operational and macromolecular parameters. Biomacromolecules 2012; 13:3703-10. [PMID: 22991894 DOI: 10.1021/bm301194f] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Alginates in the format of scaffolds provide important functions as materials for cell encapsulation, drug delivery, tissue engineering and wound healing among others. The method for preparation of alginate-based foams presented here is based on homogeneous, ionotropic gelation of aerated alginate solutions, followed by air drying. The method allows higher flexibility and better control of the pore structure, hydration properties and mechanical integrity compared to foams prepared by other techniques. The main variables for tailoring hydrogel properties include operational parameters such as degree of aeration and mixing times and concentration of alginate, as well as macromolecular properties such as the type of alginate (chemical composition and molecular weight distribution). Exposure of foams to γ-irradiation resulted in a dose-dependent (0-30 kGy) reduction in molecular weight of the alginate and a corresponding reduction in tensile strength of the foams.
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Eibak LEE, Hegge AB, Rasmussen KE, Pedersen-Bjergaard S, Gjelstad A. Alginate and Chitosan Foam Combined with Electromembrane Extraction for Dried Blood Spot Analysis. Anal Chem 2012; 84:8783-9. [DOI: 10.1021/ac301996n] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lars Erik Eng Eibak
- School of Pharmacy, University of Oslo, P.O. Box 1068 Blindern, 0316 Oslo,
Norway
| | - Anne Bee Hegge
- School of Pharmacy, University of Oslo, P.O. Box 1068 Blindern, 0316 Oslo,
Norway
| | - Knut Einar Rasmussen
- School of Pharmacy, University of Oslo, P.O. Box 1068 Blindern, 0316 Oslo,
Norway
| | - Stig Pedersen-Bjergaard
- School of Pharmacy, University of Oslo, P.O. Box 1068 Blindern, 0316 Oslo,
Norway
- Department of Pharmaceutics
and Analytical Chemistry, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100
Copenhagen, Denmark
| | - Astrid Gjelstad
- School of Pharmacy, University of Oslo, P.O. Box 1068 Blindern, 0316 Oslo,
Norway
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Photoinactivation of Staphylococcus epidermidis biofilms and suspensions by the hydrophobic photosensitizer curcumin – Effect of selected nanocarrier. Eur J Pharm Sci 2012; 47:65-74. [DOI: 10.1016/j.ejps.2012.05.002] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Revised: 04/19/2012] [Accepted: 05/03/2012] [Indexed: 12/11/2022]
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Hegge ABEE, Nielsen TT, Larsen KL, Bruzell E, Tønnesen HH. Impact of curcumin supersaturation in antibacterial photodynamic therapy--effect of cyclodextrin type and amount: studies on curcumin and curcuminoides XLV. J Pharm Sci 2012; 101:1524-37. [PMID: 22228150 DOI: 10.1002/jps.23046] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Revised: 10/25/2011] [Accepted: 12/14/2011] [Indexed: 01/15/2023]
Abstract
Curcumin has been investigated as a potential photosensitizer (PS) in antimicrobial photodynamic therapy (aPDT). The phototoxic effect of curcumin is dependent on proper formulations of the compound because of the lipophilic nature of the molecule and the extremely low water solubility at physiological conditions. In the present study, the combination of curcumin with either a methylated β-cyclodextrin (CD) or polyethylene glycol-based β-CD or γ-CD polymers was investigated in aPDT using Escherichia coli (E. coli) and Enterococcus faecalis as model bacteria. Solutions with various supersaturation ratios of curcumin were prepared with the selected CD or CD polymers. The concept of supersaturation was then investigated as a mean to enhance the phototoxic effect of curcumin, especially toward the gram-negative bacteria E. coli. A high supersaturation ratio corresponded with high phototoxicity of E. coli. Depending on the curcumin preparation, the bacterial survival ranged from 0.01% to no significant effect after irradiation with blue light (29 J/cm(2) ). Temporal stabilization of the supersaturated state is necessary in order to retain high and predictable photoreactivity of the PS. Further studies will be needed in order to formulate curcumin preparations with acceptable hydrolytic and photolytic stability and a temporal stabilization of a supersaturated state.
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Hegge AB, Andersen T, Melvik JE, Bruzell E, Kristensen S, Tønnesen HH. Formulation and bacterial phototoxicity of curcumin loaded alginate foams for wound treatment applications: studies on curcumin and curcuminoides XLII. J Pharm Sci 2010; 100:174-85. [PMID: 20575064 DOI: 10.1002/jps.22263] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2010] [Revised: 04/09/2010] [Accepted: 05/08/2010] [Indexed: 12/15/2022]
Abstract
Curcumin loaded alginate foams are proposed for application in antimicrobial photodynamic therapy of infected wounds. The drug loaded foams were formulated to provide a burst release of the photosensitizer when hydrated. The foams remained intact after hydration and would be possible to remove from the wound prior to irradiation without causing any tissue damage. The characterization of the prepared foams showed that both curcumin loaded and unloaded foams hydrated within 1 min and absorbed from 12 to 16 times their dry weight of a model physiological fluid. Curcumin, the model photosensitizer, has an extremely low solubility in water and may aggregate in aqueous environment. Cyclodextrins (CDs) and polyethylene glycol 400 (PEG 400) were therefore selected as solubilizers of curcumin in the foams to provide a burst release of the photosensitizer. Exposure to the prepared foams in combination with visible light irradiation (∼9.7 J/cm(2)) resulted in >6 log reduction of Entrococcus faecalis cells. However, curcumin mediated photokilling of Escherichia coli was ineffective when CDs were selected as solubilizer of curcumin in the foams. An 81% reduction in viable E. coli cells was detected after treatment with the foam containing PEG 400 as the only solubilizer of curcumin combined with visible light irradiation (∼29 J/cm(2)).
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