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Smith-Craven MM, Dening TJ, Basra AK, Hageman MJ. Enhanced Dissolution of Amphotericin B through Development of Amorphous Solid Dispersions Containing Polymer and Surfactants. J Pharm Sci 2024:S0022-3549(24)00157-6. [PMID: 38701896 DOI: 10.1016/j.xphs.2024.04.031] [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: 01/03/2024] [Revised: 04/25/2024] [Accepted: 04/26/2024] [Indexed: 05/05/2024]
Abstract
Amphotericin B (AmB) is the gold standard for antifungal therapy; however, its poor solubility limits its administration via intravenous infusion. A promising formulation strategy to achieve an oral formulation is the development of amorphous solid dispersions (ASDs) via spray-drying. Inclusion of surfactants into ASDs is a newer concept, yet it offers increased dissolution opportunities when combined with a polymer (HPMCAS 912). We developed both binary ASDs (AmB:HPMCAS 912 or AmB:surfactant) and ternary ASDs (AmB:HPMCAS 912:surfactant) using a variety of surfactants to determine the optimal surfactant carbon chain length and functional group for achieving maximal AmB concentration during in vitro dissolution. The ternary ASDs containing surfactants with a carbon chain length of 14 ± 2 carbons and a sulfate functional group increased the dissolution of AmB by 90-fold compared to crystalline AmB. These same surfactants, when added to a binary ASD, however, were only able to achieve up to a 40-fold increase, alluding to a potential interaction occurring between excipients or excipient and drug. This potential interaction was supported by dynamic light scattering data, in which the ternary formulation produced a single peak at 895.2 dnm. The absence of more than one peak insinuates that all three components are interacting in some way to form a single structure, which may be preventing AmB self-aggregation, thus improving the dissolution concentration of AmB.
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Affiliation(s)
- Mikayla M Smith-Craven
- Department of Pharmaceutical Chemistry, School of Pharmacy, The University of Kansas, Lawrence, KS 66047, USA.
| | - Tahnee J Dening
- Department of Pharmaceutical Chemistry, School of Pharmacy, The University of Kansas, Lawrence, KS 66047, USA
| | - Anil K Basra
- Department of Pharmaceutical Chemistry, School of Pharmacy, The University of Kansas, Lawrence, KS 66047, USA
| | - Michael J Hageman
- Department of Pharmaceutical Chemistry, School of Pharmacy, The University of Kansas, Lawrence, KS 66047, USA.
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2
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Quartin E, Rosa S, Gonzalez-Anton S, Mosteo Lopez L, Francisco V, Duarte D, Lo Celso C, Pires das Neves R, Ferreira L. Nanoparticle-encapsulated retinoic acid for the modulation of bone marrow hematopoietic stem cell niche. Bioact Mater 2024; 34:311-325. [PMID: 38274293 PMCID: PMC10809008 DOI: 10.1016/j.bioactmat.2023.12.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 12/16/2023] [Accepted: 12/21/2023] [Indexed: 01/27/2024] Open
Abstract
More effective approaches are needed in the treatment of blood cancers, in particular acute myeloid leukemia (AML), that are able to eliminate resistant leukemia stem cells (LSCs) at the bone marrow (BM), after a chemotherapy session, and then enhance hematopoietic stem cell (HSC) engraftment for the re-establishment of the HSC compartment. Here, we investigate whether light-activatable nanoparticles (NPs) encapsulating all-trans-retinoic acid (RA+NPs) could solve both problems. Our in vitro results show that mouse AML cells transfected with RA+NPs differentiate towards antitumoral M1 macrophages through RIG.1 and OASL gene expression. Our in vivo results further show that mouse AML cells transfected with RA+NPs home at the BM after transplantation in an AML mouse model. The photo-disassembly of the NPs within the grafted cells by a blue laser enables their differentiation towards a macrophage lineage. This macrophage activation seems to have systemic anti-leukemic effect within the BM, with a significant reduction of leukemic cells in all BM compartments, of animals treated with RA+NPs, when compared with animals treated with empty NPs. In a separate group of experiments, we show for the first time that normal HSCs transfected with RA+NPs show superior engraftment at the BM niche than cells without treatment or treated with empty NPs. This is the first time that the activity of RA is tested in terms of long-term hematopoietic reconstitution after transplant using an in situ activation approach without any exogenous priming or genetic conditioning of the transplanted cells. Overall, the approach documented here has the potential to improve consolidation therapy in AML since it allows a dual intervention in the BM niche: to tackle resistant leukemia and improve HSC engraftment at the same time.
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Affiliation(s)
- Emanuel Quartin
- CNC—Center for Neuroscience and Cell Biology, CIBB—Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004-517, Coimbra, Portugal
- IIIUC—Institute of Interdisciplinary Research, University of Coimbra, 3004-517, Coimbra, Portugal
| | - Susana Rosa
- CNC—Center for Neuroscience and Cell Biology, CIBB—Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004-517, Coimbra, Portugal
- IIIUC—Institute of Interdisciplinary Research, University of Coimbra, 3004-517, Coimbra, Portugal
| | - Sara Gonzalez-Anton
- Department of Life Sciences, Imperial College London, South Kensington Campus, The Francis Crick Institute, London, UK
- Haematopoietic Stem Cell Laboratory, The Francis Crick Institute, London, UK
| | - Laura Mosteo Lopez
- Instituto de Investigação e Inovação em Saúde (i3S), University of Porto, Porto, Portugal
- Department of Biomedicine, Faculdade de Medicina da Universidade do Porto (FMUP), Porto, Portugal
- Department of Onco-Hematology, Instituto Português de Oncologia (IPO)-Porto, Porto, Portugal
| | - Vitor Francisco
- CNC—Center for Neuroscience and Cell Biology, CIBB—Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004-517, Coimbra, Portugal
- IIIUC—Institute of Interdisciplinary Research, University of Coimbra, 3004-517, Coimbra, Portugal
| | - Delfim Duarte
- Instituto de Investigação e Inovação em Saúde (i3S), University of Porto, Porto, Portugal
- Department of Biomedicine, Faculdade de Medicina da Universidade do Porto (FMUP), Porto, Portugal
- Department of Onco-Hematology, Instituto Português de Oncologia (IPO)-Porto, Porto, Portugal
| | - Cristina Lo Celso
- Department of Life Sciences, Imperial College London, South Kensington Campus, The Francis Crick Institute, London, UK
- Haematopoietic Stem Cell Laboratory, The Francis Crick Institute, London, UK
| | - Ricardo Pires das Neves
- CNC—Center for Neuroscience and Cell Biology, CIBB—Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004-517, Coimbra, Portugal
- IIIUC—Institute of Interdisciplinary Research, University of Coimbra, 3004-517, Coimbra, Portugal
| | - Lino Ferreira
- CNC—Center for Neuroscience and Cell Biology, CIBB—Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004-517, Coimbra, Portugal
- Faculty of Medicine, University of Coimbra, 3004-517, Coimbra, Portugal
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3
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Shamshina JL, Rogers RD. Ionic Liquids: New Forms of Active Pharmaceutical Ingredients with Unique, Tunable Properties. Chem Rev 2023; 123:11894-11953. [PMID: 37797342 DOI: 10.1021/acs.chemrev.3c00384] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
This Review aims to summarize advances over the last 15 years in the development of active pharmaceutical ingredient ionic liquids (API-ILs), which make up a prospective game-changing strategy to overcome multiple problems with conventional solid-state drugs, for example, polymorphism. A critical part of the present Review is the collection of API-ILs and deep eutectic solvents (DESs) prepared to date. The Review covers rules for rational design of API-ILs and tools for API-IL formation, syntheses, and characterization. Nomenclature and ionic speciation, and the confusion that these may cause, are highlighted, particularly for speciation in both ILs and DESs of intermediate ionicity. We also highlight in vivo and in vitro pharmaceutical activity studies, with differences in pharmacokinetic/pharmacodynamic depending on ionicity of API-ILs. A brief overview is provided for the ILs used to deliver drugs, and the Review concludes with key prospects and roadblocks in translating API-ILs into pharmaceutical manufacturing.
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Affiliation(s)
- Julia L Shamshina
- Fiber and Biopolymer Research Institute (FBRI), Texas Tech University, Lubbock, Texas 79409, United States
| | - Robin D Rogers
- 525 Solutions, Inc., P.O. Box 2206, Tuscaloosa, Alabama 35403, United States
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4
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Dubashynskaya NV, Bokatyi AN, Trulioff AS, Rubinstein AA, Kudryavtsev IV, Skorik YA. Development and Bioactivity of Zinc Sulfate Cross-Linked Polysaccharide Delivery System of Dexamethasone Phosphate. Pharmaceutics 2023; 15:2396. [PMID: 37896156 PMCID: PMC10610283 DOI: 10.3390/pharmaceutics15102396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 09/22/2023] [Accepted: 09/25/2023] [Indexed: 10/29/2023] Open
Abstract
Improving the biopharmaceutical properties of glucocorticoids (increasing local bioavailability and reducing systemic toxicity) is an important challenge. The aim of this study was to develop a dexamethasone phosphate (DexP) delivery system based on hyaluronic acid (HA) and a water-soluble cationic chitosan derivative, diethylaminoethyl chitosan (DEAECS). The DexP delivery system was a polyelectrolyte complex (PEC) resulting from interpolymer interactions between the HA polyanion and the DEAECS polycation with simultaneous incorporation of zinc ions as a cross-linking agent into the complex. The developed PECs had a hydrodynamic diameter of 244 nm and a ζ-potential of +24.4 mV; the encapsulation efficiency and DexP content were 75.6% and 45.4 μg/mg, respectively. The designed DexP delivery systems were characterized by both excellent mucoadhesion and prolonged drug release (approximately 70% of DexP was released within 10 h). In vitro experiments showed that encapsulation of DexP in polysaccharide nanocarriers did not reduce its anti-inflammatory activity compared to free DexP.
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Affiliation(s)
- Natallia V. Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 Saint Petersburg, Russia; (A.N.B.); (Y.A.S.)
| | - Anton N. Bokatyi
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 Saint Petersburg, Russia; (A.N.B.); (Y.A.S.)
| | - Andrey S. Trulioff
- Institute of Experimental Medicine, Acad. Pavlov St. 12, 197376 Saint Petersburg, Russia; (A.S.T.); (A.A.R.); (I.V.K.)
| | - Artem A. Rubinstein
- Institute of Experimental Medicine, Acad. Pavlov St. 12, 197376 Saint Petersburg, Russia; (A.S.T.); (A.A.R.); (I.V.K.)
| | - Igor V. Kudryavtsev
- Institute of Experimental Medicine, Acad. Pavlov St. 12, 197376 Saint Petersburg, Russia; (A.S.T.); (A.A.R.); (I.V.K.)
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 Saint Petersburg, Russia; (A.N.B.); (Y.A.S.)
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5
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Dextran Formulations as Effective Delivery Systems of Therapeutic Agents. Molecules 2023; 28:molecules28031086. [PMID: 36770753 PMCID: PMC9920038 DOI: 10.3390/molecules28031086] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/12/2023] [Accepted: 01/20/2023] [Indexed: 01/24/2023] Open
Abstract
Dextran is by far one of the most interesting non-toxic, bio-compatible macromolecules, an exopolysaccharide biosynthesized by lactic acid bacteria. It has been extensively used as a major component in many types of drug-delivery systems (DDS), which can be submitted to the next in-vivo testing stages, and may be proposed for clinical trials or pharmaceutical use approval. An important aspect to consider in order to maintain high DDS' biocompatibility is the use of dextran obtained by fermentation processes and with a minimum chemical modification degree. By performing chemical modifications, artefacts can appear in the dextran spatial structure that can lead to decreased biocompatibility or even cytotoxicity. The present review aims to systematize DDS depending on the dextran type used and the biologically active compounds transported, in order to obtain desired therapeutic effects. So far, pure dextran and modified dextran such as acetalated, oxidised, carboxymethyl, diethylaminoethyl-dextran and dextran sulphate sodium, were used to develop several DDSs: microspheres, microparticles, nanoparticles, nanodroplets, liposomes, micelles and nanomicelles, hydrogels, films, nanowires, bio-conjugates, medical adhesives and others. The DDS are critically presented by structures, biocompatibility, drugs loaded and therapeutic points of view in order to highlight future therapeutic perspectives.
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6
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Umar Y, Al-Batty S, Rahman H, Ashwaq O, Sarief A, Sadique Z, Sreekumar PA, Haque SKM. Polymeric Materials as Potential Inhibitors Against SARS-CoV-2. JOURNAL OF POLYMERS AND THE ENVIRONMENT 2021; 30:1244-1263. [PMID: 34518763 PMCID: PMC8426594 DOI: 10.1007/s10924-021-02272-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/22/2021] [Indexed: 05/02/2023]
Abstract
Recently discovered SARS-CoV-2 caused a pandemic that triggered researchers worldwide to focus their research on all aspects of this new peril to humanity. However, in the absence of specific therapeutic intervention, some preventive strategies and supportive treatment minimize the viral transmission as studied by some factors such as basic reproduction number, case fatality rate, and incubation period in the epidemiology of viral diseases. This review briefly discusses coronaviruses' life cycle of SARS-CoV-2 in a human host cell and preventive strategies at some selected source of infection. The antiviral activities of synthetic and natural polymers such as chitosan, hydrophobically modified chitosan, galactosylated chitosan, amine-based dendrimers, cyclodextrin, carrageenans, polyethyleneimine, nanoparticles are highlighted in this article. Mechanism of virus inhibition, detection and diagnosis are also presented. It also suggests that polymeric materials and nanoparticles can be effective as potential inhibitors and immunization against coronaviruses which would further develop new technologies in the field of polymer and nanoscience.
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Affiliation(s)
- Yunusa Umar
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City, 31961 Saudi Arabia
| | - Sirhan Al-Batty
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City, 31961 Saudi Arabia
| | - Habibur Rahman
- Department of General Studies, Jubail Industrial College, Jubail Industrial City, 31961 Saudi Arabia
| | - Omar Ashwaq
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City, 31961 Saudi Arabia
| | - Abdulla Sarief
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City, 31961 Saudi Arabia
| | - Zakariya Sadique
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City, 31961 Saudi Arabia
| | - P. A. Sreekumar
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City, 31961 Saudi Arabia
| | - S. K. Manirul Haque
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City, 31961 Saudi Arabia
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7
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Hafez IT, Biskos G. New method for the protection and restoration of calcareous cultural heritage stones by polyelectrolytes and hydroxyapatite nanocrystals. J Colloid Interface Sci 2021; 604:604-615. [PMID: 34280758 DOI: 10.1016/j.jcis.2021.07.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 07/01/2021] [Accepted: 07/02/2021] [Indexed: 11/29/2022]
Abstract
We have investigated the feasibility of a new two-step protocol for the restoration of marbles. The process employs a polyelectrolyte multilayer film that enhances the chemical affinity between the treated stone and restorative material (hydroxyapatite nanocrystals), through functionalization, while at the same time it attributes an acid resistant property to the resulting system. Surface functionalization and material deposition is achieved through spraying; a simple and versatile application method suitable for objects of various sizes and geometries. Polyelectrolyte (polyethylenimine and polyacrylic acid) deposition was examined through Attenuated Total Reflection Fourier-Transform Infrared Spectroscopy (ATR-FTIR) and Atomic Force Microscopy (AFM), and tested through contact angle, water absorption and dissolution experiments. The hydroxyapatite nanocrystals were studied by ATR-FTIR, z-potential, AFM and Scanning Electron Microscopy (SEM), and characterized via contact angle and color alteration measurements. Our results show that the polyelectrolyte multilayer was stable in an aqueous environment with increased acid resistance (up to 46% decrease in mass weight loss when compared with untreated samples) and decreased water absorption (up to 39%). Color measurements of the outer hydroxyapatite layer showed a minimal color alteration for one type of the tested substrates showing low color difference values (ΔΕ* < 5). The results suggest that the proposed method holds great potential for marble restoration as it attributes multi-functionality and is easy to apply.
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Affiliation(s)
- Iosif T Hafez
- Science and Technology in Archaeology and Culture Research Center, The Cyprus Institute, Nicosia 2121, Cyprus; Climate and Atmosphere Research Center, The Cyprus Institute, Nicosia 2121, Cyprus.
| | - George Biskos
- Climate and Atmosphere Research Center, The Cyprus Institute, Nicosia 2121, Cyprus; Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft 2628 CN, the Netherlands
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8
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Mercadante V, Scarpa E, De Matteis V, Rizzello L, Poma A. Engineering Polymeric Nanosystems against Oral Diseases. Molecules 2021; 26:2229. [PMID: 33924289 PMCID: PMC8070659 DOI: 10.3390/molecules26082229] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/31/2021] [Accepted: 04/06/2021] [Indexed: 12/26/2022] Open
Abstract
Nanotechnology and nanoparticles (NPs) are at the forefront of modern research, particularly in the case of healthcare therapeutic applications. Polymeric NPs, specifically, hold high promise for these purposes, including towards oral diseases. Careful optimisation of the production of polymeric NPs, however, is required to generate a product which can be easily translated from a laboratory environment to the actual clinical usage. Indeed, considerations such as biocompatibility, biodistribution, and biodegradability are paramount. Moreover, a pre-clinical assessment in adequate in vitro, ex vivo or in vivo model is also required. Last but not least, considerations for the scale-up are also important, together with an appropriate clinical testing pathway. This review aims to eviscerate the above topics, sourcing at examples from the recent literature to put in context the current most burdening oral diseases and the most promising polymeric NPs which would be suitable against them.
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Affiliation(s)
- Valeria Mercadante
- Division of Oral Medicine, UCL Eastman Dental Institute, Bloomsbury Campus, Rockefeller Building, 21 University Street, London WC1E 6DE, UK;
| | - Edoardo Scarpa
- Department of Pharmaceutical Sciences (DISFARM), National Institute of Molecular Genetics (INGM), Via G. Balzaretti 9, 20133 Milan, Italy; (E.S.); (L.R.)
- National Institute of Molecular Genetics (INGM), Via F. Sforza 35, 20122 Milan, Italy
| | - Valeria De Matteis
- Department of Mathematics and Physics “Ennio De Giorgi”, Via Monteroni, c/o Campus Ecotekne, 73100 Lecce, Italy;
| | - Loris Rizzello
- Department of Pharmaceutical Sciences (DISFARM), National Institute of Molecular Genetics (INGM), Via G. Balzaretti 9, 20133 Milan, Italy; (E.S.); (L.R.)
- National Institute of Molecular Genetics (INGM), Via F. Sforza 35, 20122 Milan, Italy
| | - Alessandro Poma
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, Royal Free Hospital, UCL Medical School, Rowland Hill Street, London NW3 2PF, UK
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9
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Li Y, Zhang Y, Dai W, Zhang Q. Enhanced oral absorption and anti-inflammatory activity of ellagic acid via a novel type of case in nanosheets constructed by simple coacervation. Int J Pharm 2021; 594:120131. [PMID: 33271309 DOI: 10.1016/j.ijpharm.2020.120131] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 11/10/2020] [Accepted: 11/25/2020] [Indexed: 11/16/2022]
Abstract
As a nature component, ellagic acid (EA) shows a broad array of pharmacological activities but is lost in clinical translation partly due to poor aqueous solubility. In an effort to enhance its oral absorption, novel EA-loaded casein nanosheets (EA@CAS-NSs) was constructed by simple coacervation and investigated for in vitro characterization and in vivo evaluation. The influences of factors including pH, EA concentration, and mass ratio of CAS and EA on properties of EA@CAS-NSs were also studied. The low pH value and high matrix and drug ratio were harmful to small particle size of EA@CAS-NSs. Meanwhile, the low and high concentration of EA went against the 8 h short-term stability of EA@CAS-NSs. Interestingly, EA@CAS-NSs showed a typical disk-like structure with a diameter of 100-400 nm and good long-term storage stability for 24 months. The molecular structure of EA in NSs remained unchanged, but the EA in NSs had lower crystallinity and better thermal stability than in raw state. No chemical interaction occurred between CAS and EA, although the intermolecular distance of them was less than 10 nm. In simulated intestinal fluid, the solubility of EA in NSs was nearly three times that of raw EA, and the dissolution of EA@CAS-NSs was 12 folds of raw EA at 120 min. With oral administration, EA@CAS-NSs demonstrated an improved oral absorption in rats, as evidenced by an AUC0-24 value 2.34 times higher than raw EA. Also, the EA@CAS-NSs showed a better anti-inflammatory activity than EA. Generally, EA@CAS-NSs could be a potential strategy for the further clinic use of EA.
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Affiliation(s)
- Yong Li
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China; State Key Laboratory of Natural and Biomimetic Drugs, Beijing 100191, China; Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Yin Zhang
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou 511436, China
| | - Wenbing Dai
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China; State Key Laboratory of Natural and Biomimetic Drugs, Beijing 100191, China; Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
| | - Qiang Zhang
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China; State Key Laboratory of Natural and Biomimetic Drugs, Beijing 100191, China; Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China; Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou 511436, China.
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Potent and Specific Antibacterial Activity against Escherichia coli O157:H7 and Methicillin Resistant Staphylococcus aureus (MRSA) of G17 and G19 Peptides Encapsulated into Poly-Lactic-Co-Glycolic Acid (PLGA) Nanoparticles. Antibiotics (Basel) 2020; 9:antibiotics9070384. [PMID: 32645834 PMCID: PMC7400247 DOI: 10.3390/antibiotics9070384] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/27/2020] [Accepted: 07/01/2020] [Indexed: 11/16/2022] Open
Abstract
Antimicrobial peptides constitute an excellent alternative against conventional antibiotics because of their potent antimicrobial spectrum, unspecific action mechanism and low capacity to produce antibiotic resistance. However, a potential use of these biological molecules as therapeutic agents is threatened by their low stability and susceptibility to proteases. In order to overcome these limitations, encapsulation in biocompatible polymers as poly-lactic-glycolic-acid (PLGA) is a promising alternative for increasing their stability and bioavailability. In this work, the effect of new synthetic antimicrobial peptides GIBIM-P5S9K (G17) and GAM019 (G19) encapsulated on PLGA and acting against methicillin resistant Staphylococus aureus (MRSA) and Escherichia coli O157:H7 was studied. PLGA encapsulation allowed us to load around 7 µg AMPs/mg PLGA with an efficiency of 90.5%, capsule sizes around 290 nm and positive charges. Encapsulation improved antimicrobial activity, decreasing MIC50 from 1.5 to 0.2 (G17NP) and 0.7 (G19NP) µM against MRSA, and from 12.5 to 3.13 µM for E. coli O157:H7. Peptide loaded nanoparticles could be a bacteriostatic drug with potential application to treat these bacterial E. coli O157:H7 and MRSA infections, with a slow and gradual release.
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11
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Blersch J, Francisco V, Rebelo C, Jiménez-Balsa A, Antunes H, Pinto S, Simões S, Rai A, Ferreira L. A light-triggerable formulation to control the stability of pro-angiogenic transcription factor hypoxia inducible factor-1α (HIF-1α). NANOSCALE 2020; 12:9935-9942. [PMID: 32352454 DOI: 10.1039/c9nr10503d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The control of vascular remodeling mediated by transcription factor HIF-1α is critical in the treatment of several diseases including cancer, retinopathies, chronic wounds, and ischemic heart disease, among others. Gene silencing using a small interfering RNA (siRNA) is a promising therapeutic strategy to regulate HIF-1α; however, the delivery systems developed so far have limited endothelial targeting and efficiency. Herein, we have synthesized a light-triggerable polymeric nanoparticle (NP) library composed of 110 formulations which showed variable morphology, charge and disassembly rates after UV exposure. More than 35% of the formulations of the library were more efficient in gene knockdown than the siRNA delivered by a commercial transfection agent (lipofectamine RNAiMAX). The most efficient siRNA delivery formulations were tested against different cell types to identify one with preferential targeting to endothelial cells. Using a two-step methodology, we have identified a formulation that shows exquisite targeting to endothelial cells and is able to deliver more efficiently the siRNA that modulates HIF-1α than commercial transfection agents. Overall, the strategy reported here increases the specificity for tissue regulation and the efficiency for the intracellular delivery of siRNAs.
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Affiliation(s)
- Josephine Blersch
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
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12
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Zeeshan M, Ali H, Khan S, Mukhtar M, Khan MI, Arshad M. Glycyrrhizic acid-loaded pH-sensitive poly-(lactic-co-glycolic acid) nanoparticles for the amelioration of inflammatory bowel disease. Nanomedicine (Lond) 2019; 14:1945-1969. [DOI: 10.2217/nnm-2018-0415] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Aim: To fabricate and evaluate the therapeutic efficacy of glycyrrhizic acid (GA)-loaded pH-sensitive nanoformulations that specifically target and combat mucosal inflammation of the colon. Methods: GA-loaded Eudragit® S100/poly-(lactic-co-glycolic acid) nanoparticles were developed through modified double-emulsion evaporation coupled with solvent evaporation coating techniques and analyzed for physicochemical characteristics, surface chemistry, release kinetics, site-retention and therapeutic effectiveness. Results: Nanoparticles have a particle size of approximately 200 nm, high encapsulation efficiency, desired surface chemistry with pH-dependent and sustained drug release behavior following the Gompertz kinetic model. In vivo retention and therapeutic effectiveness in the inflamed colon tissues were confirmed by macroscopic and microscopic indices, cytokine analysis and antioxidant assays. Conclusion: GA-loaded Eudragit S100/poly-(lactic-co-glycolic acid) nanoparticles could efficiently deliver GA to the colon and ameliorate the mucosal inflammation for a prolonged duration.
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Affiliation(s)
- Mahira Zeeshan
- Department of Pharmacy, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Hussain Ali
- Department of Pharmacy, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Salman Khan
- Department of Pharmacy, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Mahwash Mukhtar
- Department of Pharmaceutical Technology, University of Szeged, Eötvös u. 6, 6720, Hungary
| | - Muhammad Ijaz Khan
- Department of Pharmacy, Quaid-i-Azam University, Islamabad 45320, Pakistan
- Department of Pharmacy, University of Swabi, Anbar-23561, Swabi, Pakistan
| | - Muhammad Arshad
- Department of Nanoscience & Technology, National Centre for Physics, Quaid-i-Azam University campus, Islamabad, Pakistan
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13
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Kamel R. Nanotherapeutics as promising approaches to combat fungal infections. Drug Dev Res 2019. [DOI: 10.1002/ddr.21533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rabab Kamel
- Department of Pharmaceutical TechnologyNational Research Centre Cairo Egypt
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14
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Benhalima T, Ferfera-Harrar H. Eco-friendly porous carboxymethyl cellulose/dextran sulfate composite beads as reusable and efficient adsorbents of cationic dye methylene blue. Int J Biol Macromol 2019; 132:126-141. [PMID: 30926505 DOI: 10.1016/j.ijbiomac.2019.03.164] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 03/18/2019] [Accepted: 03/24/2019] [Indexed: 12/11/2022]
Abstract
Eco-friendly hydrogel composite beads based on crosslinked-carboxymethyl cellulose (CMC) and dextran sulfate (DS) embedded within network were prepared using ionotropic gelation in presence of sodium n-dodecyl sulfate (SDS) as pore-forming template. The milligels composites C/Dx were characterized by FTIR, SEM/EDX and TGA analyses. The composites exhibited porous structure and enhance in swelling properties with enriching DS as well as pH-sensitivity. The effect of DS on adsorption of composites for cationic dye methylene blue (MB) was investigated by changing influencing factors: pH, adsorbent dosage, time contact, dye concentration, and temperature. The results revealed that adsorption performances were remarkably improved by increasing DS content into beads. Kinetics and isotherm adsorption studies revealed pseudo second-order and Langmuir isotherm as befitting models. The maximum Langmuir equilibrium adsorption capacity (qm) was found to increase from 82 mg g-1 for C/D0 to 526 mg g-1 for C/D1. Thermodynamic study revealed spontaneous and endothermic process nature. Furthermore, milligels displayed good reusability after five adsorption/desorption cycles and with an augment in their removal ability compared to starting ones, reaching 714 mg g-1 for R-C/D1. In view of easy preparation and recovery, effectiveness adsorption and good regeneration, the composites could be applied as low-cost adsorbents in wastewater treatment.
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Affiliation(s)
- Tayeb Benhalima
- Materials Polymer Laboratory, Department of Macromolecular Chemistry, Faculty of Chemistry, University of Sciences and Technology Houari Boumediene USTHB, B.P. 32 El-Alia, 16111 Algiers, Algeria
| | - Hafida Ferfera-Harrar
- Materials Polymer Laboratory, Department of Macromolecular Chemistry, Faculty of Chemistry, University of Sciences and Technology Houari Boumediene USTHB, B.P. 32 El-Alia, 16111 Algiers, Algeria.
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15
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Gómez-Sequeda N, Torres R, Ortiz C. Synthesis, characterization, and in vitro activity against Candida spp. of fluconazole encapsulated on cationic and conventional nanoparticles of poly(lactic-co-glycolic acid). Nanotechnol Sci Appl 2017; 10:95-104. [PMID: 28572725 PMCID: PMC5441665 DOI: 10.2147/nsa.s96018] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
In this study, nanoparticles (NPs) of poly(lactic-co-glycolic acid) (PLGA) loaded with fluconazole (FLZ) and FLZ-NPs coated with the cationic polymer polyethylenimine (PEI) (FLZ-NP-PEI) were synthetized in order to improve antimycotic activity against four strains of Candida spp. of clinical relevance. FLZ-NPs and FLZ-NP-PEI were synthesized by double emulsion solvent-diffusion (DES-D) and characterized. Minimum inhibitory concentration (MIC50) and minimum fungicide concentration (MFC) were determined in vitro by culturing Candida strains in the presence of these nanocompounds. FLZ-NPs were spherical in shape with hydrodynamic sizes of ~222 nm and surface charge of -11.6 mV. The surface charges of these NPs were successfully modified using PEI (FLZ-NP-PEI) with mean hydrodynamic sizes of 281 nm and surface charge of 23.5 mV. The efficiency of encapsulation (~53%) and a quick release of FLZ (≥90% after 3 h) were obtained. Cytotoxicity assay showed a good cell viability for FLZ-NPs (≥86%), and PEI-modified NPs presented a decrease in cell viability (~38%). FLZ-NPs showed an increasing antifungal activity of FLZ for sensitive (Candida parapsilosis ATCC22019 and Candida albicans ATCC10231, MIC50 =0.5 and 0.1 µg/mL, respectively) and resistant strains (Candida glabrata EMLM14 and Candida krusei ATCC6258, MIC50 =0.1 and 0.5 µg/mL, respectively). FLZ-NP-PEI showed fungicidal activity even against C. glabrata and C. krusei (MFC =4 and 8 µg/mL, respectively). MIC50 values showed best results for FLZ-NPs and FLZ-NP-PEI. Nevertheless, only FLZ-NP-PEI displayed fungicidal activity against the studied strains.
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Affiliation(s)
| | | | - Claudia Ortiz
- School of Microbiology, Faculty of Health, Universidad Industrial de Santander, Bucaramanga, Santander, Colombia
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Boto C, Quartin E, Cai Y, Martín-Lorenzo A, Cenador MBG, Pinto S, Gupta R, Enver T, Sánchez-García I, Hong D, Pires das Neves R, Ferreira L. Prolonged intracellular accumulation of light-inducible nanoparticles in leukemia cells allows their remote activation. Nat Commun 2017; 8:15204. [PMID: 28492285 PMCID: PMC5437273 DOI: 10.1038/ncomms15204] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 03/09/2017] [Indexed: 01/24/2023] Open
Abstract
Leukaemia cells that are resistant to conventional therapies are thought to reside in protective niches. Here, we describe light-inducible polymeric retinoic acid (RA)-containing nanoparticles (NPs) with the capacity to accumulate in the cytoplasm of leukaemia cells for several days and release their RA payloads within a few minutes upon exposure to blue/UV light. Compared to NPs that are not activated by light exposure, these NPs more efficiently reduce the clonogenicity of bone marrow cancer cells from patients with acute myeloid leukaemia (AML) and induce the differentiation of RA-low sensitive leukaemia cells. Importantly, we show that leukaemia cells transfected with light-inducible NPs containing RA can engraft into bone marrow in vivo in the proximity of other leukaemic cells, differentiate upon exposure to blue light and release paracrine factors that modulate nearby cells. The NPs described here offer a promising strategy for controlling distant cell populations and remotely modulating leukaemic niches.
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Affiliation(s)
- Carlos Boto
- CNC-Center for Neurosciences and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
- 3Is—Institute for Interdisciplinary Research, University of Coimbra, 3030-789 Coimbra, Portugal
| | - Emanuel Quartin
- CNC-Center for Neurosciences and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
- 3Is—Institute for Interdisciplinary Research, University of Coimbra, 3030-789 Coimbra, Portugal
| | - Yijun Cai
- Key Laboratory of Cell Differentiation and Apoptosis of National Ministry of Education, Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Alberto Martín-Lorenzo
- Experimental Therapeutics and Translational Oncology Program, Instituto de Biologia Molecular y Celular del Cancer (IBMCC), CSIC/University of Salamanca, Salamanca, Spain
- Institute of Biomedical Research of Salamanca (IBSAL), Hospital Virgen de La Vega, 37007 Salamanca, Spain
| | - María Begoña García Cenador
- Institute of Biomedical Research of Salamanca (IBSAL), Hospital Virgen de La Vega, 37007 Salamanca, Spain
- Department of Surgery, University of Salamanca, 37007 Salamanca, Spain
| | - Sandra Pinto
- CNC-Center for Neurosciences and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
- 3Is—Institute for Interdisciplinary Research, University of Coimbra, 3030-789 Coimbra, Portugal
| | - Rajeev Gupta
- UCL Cancer Institute, University College London, WC1E 6DD London, UK
| | - Tariq Enver
- UCL Cancer Institute, University College London, WC1E 6DD London, UK
| | - Isidro Sánchez-García
- Experimental Therapeutics and Translational Oncology Program, Instituto de Biologia Molecular y Celular del Cancer (IBMCC), CSIC/University of Salamanca, Salamanca, Spain
- Institute of Biomedical Research of Salamanca (IBSAL), Hospital Virgen de La Vega, 37007 Salamanca, Spain
| | - Dengli Hong
- Key Laboratory of Cell Differentiation and Apoptosis of National Ministry of Education, Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Ricardo Pires das Neves
- CNC-Center for Neurosciences and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
- 3Is—Institute for Interdisciplinary Research, University of Coimbra, 3030-789 Coimbra, Portugal
| | - Lino Ferreira
- CNC-Center for Neurosciences and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
- Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal
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17
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Radwan MA, AlQuadeib BT, Šiller L, Wright MC, Horrocks B. Oral administration of amphotericin B nanoparticles: antifungal activity, bioavailability and toxicity in rats. Drug Deliv 2017; 24:40-50. [PMID: 28155565 PMCID: PMC8247729 DOI: 10.1080/10717544.2016.1228715] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Amphotericin B (AMB) is used most commonly in severe systemic life-threatening fungal infections. There is currently an unmet need for an efficacious (AMB) formulation amenable to oral administration with better bioavailability and lower nephrotoxicity. Novel PEGylated polylactic-polyglycolic acid copolymer (PLGA-PEG) nanoparticles (NPs) formulations of AMB were therefore studied for their ability to kill Candida albicans (C. albicans). The antifungal activity of AMB formulations was assessed in C. albicans. Its bioavalability was investigated in nine groups of rats (n = 6). Toxicity was examined by an in vitro blood hemolysis assay, and in vivo nephrotoxicity after single and multiple dosing for a week by blood urea nitrogen (BUN) and plasma creatinine (PCr) measurements. The MIC of AMB loaded to PLGA-PEG NPs against C. albicans was reduced two to threefold compared with free AMB. Novel oral AMB delivery loaded to PLGA-PEG NPs was markedly systemically available compared to Fungizone® in rats. The addition of 2% of GA to the AMB formulation significantly (p < 0.05) improved the bioavailability from 1.5 to 10.5% and the relative bioavailability was > 790% that of Fungizone®. The novel AMB formulations showed minimal toxicity and better efficacy compared to Fungizone®. No nephrotoxicity in rats was detected after a week of multiple dosing of AMB NPs based on BUN and PCr, which remained at normal levels. An oral delivery system of AMB-loaded to PLGA-PEG NPs with better efficacy and minimal toxicity was formulated. The addition of glycyrrhizic acid (GA) to AMB NPs formulation resulted in a significant oral absorption and improved bioavailability in rats.
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Affiliation(s)
- Mahasen A Radwan
- a Department of Pharmaceutical Practice , College of Pharmacy, Princess Nourah bint Abdelrahman University , Riyadh , Saudi Arabia.,b Department of Pharmaceutics and Pharmaceutical Technology , College of Pharmacy, Egyptian Russian University , Bader City , Egypt
| | - Bushra T AlQuadeib
- c Department of Pharmaceutics , College of Pharmacy, King Saud University , Riyadh , Saudi Arabia
| | - Lidija Šiller
- d School of Chemical Engineering and Advanced Materials, Herschel Building, Newcastle University , Newcastle upon Tyne , UK , and
| | - Matthew C Wright
- e Institute of Cellular Medicine, Leech Building, Medical School, Newcastle University , Newcastle upon Tyne , UK
| | - Benjamin Horrocks
- d School of Chemical Engineering and Advanced Materials, Herschel Building, Newcastle University , Newcastle upon Tyne , UK , and
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Souza ACO, Amaral AC. Antifungal Therapy for Systemic Mycosis and the Nanobiotechnology Era: Improving Efficacy, Biodistribution and Toxicity. Front Microbiol 2017; 8:336. [PMID: 28326065 PMCID: PMC5340099 DOI: 10.3389/fmicb.2017.00336] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 02/17/2017] [Indexed: 01/11/2023] Open
Abstract
Fungal diseases have been emerging as an important public health problem worldwide with the increase in host predisposition factors due to immunological dysregulations, immunosuppressive and/or anticancer therapy. Antifungal therapy for systemic mycosis is limited, most of times expensive and causes important toxic effects. Nanotechnology has become an interesting strategy to improve efficacy of traditional antifungal drugs, which allows lower toxicity, better biodistribution, and drug targeting, with promising results in vitro and in vivo. In this review, we provide a discussion about conventional antifungal and nanoantifungal therapies for systemic mycosis.
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Affiliation(s)
- Ana C. O. Souza
- Laboratory of Pathogenic Dimorphic Fungi, Institute of Biomedical Sciences, University of São PauloSão Paulo, Brazil
| | - Andre C. Amaral
- Laboratory of Nano and Biotechnology, Institute of Tropical Pathology and Public Health, Federal University of GoiásGoiânia, Brazil
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19
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Salvioni L, Fiandra L, Del Curto MD, Mazzucchelli S, Allevi R, Truffi M, Sorrentino L, Santini B, Cerea M, Palugan L, Corsi F, Colombo M. Oral delivery of insulin via polyethylene imine-based nanoparticles for colonic release allows glycemic control in diabetic rats. Pharmacol Res 2016; 110:122-130. [DOI: 10.1016/j.phrs.2016.05.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 05/10/2016] [Accepted: 05/10/2016] [Indexed: 11/27/2022]
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20
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Zhang Z, Wang Z, Nong J, Nix CA, Ji HF, Zhong Y. Metal ion-assisted self-assembly of complexes for controlled and sustained release of minocycline for biomedical applications. Biofabrication 2015; 7:015006. [PMID: 25599696 DOI: 10.1088/1758-5090/7/1/015006] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
This study reports the development of novel drug delivery complexes self-assembled by divalent metal ion-assisted coacervation for controlled and sustained release of a hydrophilic small drug molecule minocycline hydrochloride (MH). MH is a multifaceted agent that has demonstrated therapeutic effects in infection, inflammation, tumor, as well as cardiovascular, renal, and neurological disorders due to its anti-microbial, anti-inflammatory, and cytoprotective properties. However, the inability to translate the high doses used in experimental animals to tolerable doses in human patients limits its clinical application. Localized delivery can potentially expose the diseased tissue to high concentrations of MH that systemic delivery cannot achieve, while minimizing the side effects from systemic exposure. The strong metal ion binding-assisted interaction enabled high drug entrapment and loading efficiency, and stable long term release for more than 71 d. Released MH demonstrated potent anti-biofilm, anti-inflammatory, and neuroprotective activities. Furthermore, MH release from the complexes is pH-sensitive as the chelation between minocycline and metal ions decreases with pH, allowing 'smart' drug release in response to the severity of pathology-induced tissue acidosis. This novel metal ion binding-mediated drug delivery mechanism can potentially be applied to other drugs that have high binding affinity for metal ions and may lead to the development of new delivery systems for a variety of drugs.
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Affiliation(s)
- Zhiling Zhang
- School of Biomedical Engineering, Science and Health Systems, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA
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21
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Significance of algal polymer in designing amphotericin B nanoparticles. ScientificWorldJournal 2014; 2014:564573. [PMID: 25478596 PMCID: PMC4244925 DOI: 10.1155/2014/564573] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 09/01/2014] [Accepted: 09/15/2014] [Indexed: 11/21/2022] Open
Abstract
Development of oral amphotericin B (AmB) loaded nanoparticles (NPs) demands a novel technique which reduces its toxicity and other associated problems. Packing of AmB in between two oppositely charged ions by polyelectrolyte complexation technique proved to be a successful strategy. We have developed a novel carrier system in form of polyelectrolyte complex of AmB by using chitosan (CS) and porphyran (POR) as two oppositely charged polymers with TPP as a crosslinking agent. Initially POR was isolated from Porphyra vietnamensis followed by the fact that its alkali induced safe reduction in molecular weight was achieved. Formulation was optimized using three-factor three-level (33) central composite design. High concentration of POR in NPs was confirmed by sulfated polysaccharide (SP) assay. Degradation and dissolution studies suggested the stability of NPs over wide pH range. Hemolytic toxicity data suggested the safety of prepared formulation. In vivo and in vitro antifungal activity demonstrated the high antifungal potential of optimized formulation when compared with standard drug and marketed formulations. Throughout the study TPP addition did not cause any significant changes. Therefore, these experimental oral NPs may represent an interesting carrier system for the delivery of AmB.
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22
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Tiyaboonchai W, Rodleang I, Ounaroon A. Mucoadhesive polyethylenimine-dextran sulfate nanoparticles containing Punica granatum peel extract as a novel sustained-release antimicrobial. Pharm Dev Technol 2014; 20:426-32. [PMID: 24438035 DOI: 10.3109/10837450.2013.879884] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Mucoadhesive polyethylenimine-dextran sulfate nanoparticles (PDNPs) were developed for local oral mucosa delivery. Punica granatum peel extract (PGE) was loaded into PDNPs for oral malodor reduction and caries prevention. PDNPs were constructed using the polyelectrolyte complexation technique employing oppositely charged polymers polyethylenimine (PEI) and dextran sulfate (DS), with PEG 400 as a stabilizer. Under optimal conditions, spherical particles of ∼ 500 nm with a zeta potential of ∼+28 mV were produced. Up to 98%, drug entrapment efficiency was observed. The mass ratio of PEI:DS played a significant role in controlling particle size and entrapment efficacy. PDNPs shown to be a good mucoadhesive drug delivery system as confirmed by ex vivo wash off test. In vitro dissolution studies revealed that PGE-loaded PDNPs manifested a prolong release characteristic with a burst release within 5 min. In addition, they remained effectively against oral bacteria.
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Affiliation(s)
- Waree Tiyaboonchai
- Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Naresuan University , Phitsanulok , Thailand
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23
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Mizrahy S, Landesman-Milo D, Peer D. Sweet Fairytale: Carbohydrates as Backbones for Glyconanomedicine. Isr J Chem 2013. [DOI: 10.1002/ijch.201300068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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24
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Hudson D, Margaritis A. Biopolymer nanoparticle production for controlled release of biopharmaceuticals. Crit Rev Biotechnol 2013; 34:161-79. [DOI: 10.3109/07388551.2012.743503] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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25
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McCrary PD, Beasley PA, Gurau G, Narita A, Barber PS, Cojocaru OA, Rogers RD. Drug specific, tuning of an ionic liquid's hydrophilic–lipophilic balance to improve water solubility of poorly soluble active pharmaceutical ingredients. NEW J CHEM 2013. [DOI: 10.1039/c3nj00454f] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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26
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Rolland J, Guillet P, Schumers JM, Duhem N, Préat V, Gohy JF. Polyelectrolyte complex nanoparticles from chitosan and poly(acrylic acid) and Polystyrene-block
-poly(acrylic acid). ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26255] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Müller M, Keßler B. Release of pamidronate from poly(ethyleneimine)/cellulose sulphate complex nanoparticle films: An in situ ATR-FTIR study. J Pharm Biomed Anal 2012; 66:183-90. [DOI: 10.1016/j.jpba.2012.03.047] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Revised: 03/23/2012] [Accepted: 03/24/2012] [Indexed: 11/26/2022]
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Müller M. Sizing, Shaping and Pharmaceutical Applications of Polyelectrolyte Complex Nanoparticles. ADVANCES IN POLYMER SCIENCE 2012. [DOI: 10.1007/12_2012_170] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Colloidal polyelectrolyte complexes of chitosan and dextran sulfate towards versatile nanocarriers of bioactive molecules. Eur J Pharm Biopharm 2011; 78:10-8. [DOI: 10.1016/j.ejpb.2010.12.001] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 12/01/2010] [Accepted: 12/01/2010] [Indexed: 11/16/2022]
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Maia J, Santos T, Aday S, Agasse F, Cortes L, Malva JO, Bernardino L, Ferreira L. Controlling the neuronal differentiation of stem cells by the intracellular delivery of retinoic acid-loaded nanoparticles. ACS NANO 2011; 5:97-106. [PMID: 21171566 DOI: 10.1021/nn101724r] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The manipulation of endogenous stem cell populations from the subventricular zone (SVZ), a neurogenic niche, creates an opportunity to induce neurogenesis and influence brain regenerative capacities in the adult brain. Herein, we demonstrate the ability of polyelectrolyte nanoparticles to induce neurogenesis exclusively after being internalized by SVZ stem cells. The nanoparticles are not cytotoxic for concentrations equal or below 10 μg/mL. The internalization process is rapid, and nanoparticles escape endosomal fate in a few hours. Retinoic acid-loaded nanoparticles increase the number of neuronal nuclear protein (NeuN)-positive neurons and functional neurons responding to depolarization with KCl and expressing NMDA receptor subunit type 1 (NR1). These nanoparticles offer an opportunity for in vivo delivery of proneurogenic factors and neurodegenerative disease treatment.
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Affiliation(s)
- João Maia
- Chemical Engineering Department, University of Coimbra, Pinhal de Marrocos, 3030-290 Coimbra, Portugal
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32
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Chuealee R, Wiedmann TS, Srichana T. Physicochemical properties and antifungal activity of amphotericin B incorporated in cholesteryl carbonate esters. J Pharm Sci 2010; 100:1727-35. [PMID: 21374610 DOI: 10.1002/jps.22398] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2010] [Revised: 10/02/2010] [Accepted: 10/13/2010] [Indexed: 11/09/2022]
Abstract
The antifungal activity of amphotericin B (AmB) incorporated in three cholesteryl carbonate esters (CCEs), sodium cholesteryl carbonate, cholesteryl palmityl carbonate, and dicholesteryl carbonate, was examined to assess their potential for use in a dry powder aerosol. Formulations containing dissolved AmB were stable for 6 months. The particle size varied inversely with liquid crystalline content with observed mass median aerodynamic diameters ranging from 4 to 8 μ m. This was consistent with the visual appearance of the liquid crystals as being low density and free flowing at room temperature. When dispersed in water, the presence of the CCE reduced the rate and extent of AmB release, consistent with the estimated liquid crystal/water partition coefficient. Nevertheless, the rate of AmB release was always sufficient to kill the fungus as established with bioactivity studies. AmB formulated with CCE as a dry powder appears to be promising for use in treating lung fungal infections.
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Affiliation(s)
- Rabkwan Chuealee
- Department of Pharmaceutical Technology and Drug Delivery System Excellence Center, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat Yai, Songkla 90112, Thailand
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33
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Development of a new micellar anticancer drug: Cationic polymer/vitamin A conjugate covered with hyaluronic acid. Macromol Res 2010. [DOI: 10.1007/s13233-010-0907-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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34
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Boddohi S, Kipper MJ. Engineering nanoassemblies of polysaccharides. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:2998-3016. [PMID: 20593437 DOI: 10.1002/adma.200903790] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Polysaccharides offer a wealth of biochemical and biomechanical functionality that can be used to develop new biomaterials. In mammalian tissues, polysaccharides often exhibit a hierarchy of structure, which includes assembly at the nanometer length scale. Furthermore, their biochemical function is determined by their nanoscale organization. These biological nanostructures provide the inspiration for developing techniques to tune the assembly of polysaccharides at the nanoscale. These new polysaccharide nanostructures are being used for the stabilization and delivery of drugs, proteins, and genes, the engineering of cells and tissues, and as new platforms on which to study biochemistry. In biological systems polysaccharide nanostructures are assembled via bottom-up processes. Many biologically derived polysaccharides behave as polyelectrolytes, and their polyelectrolyte nature can be used to tune their bottom-up assembly. New techniques designed to tune the structure and composition of polysaccharides at the nanoscale are enabling researchers to study in detail the emergent biological properties that arise from the nanoassembly of these important biological macromolecules.
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Affiliation(s)
- Soheil Boddohi
- Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO, USA
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35
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Jain JP, Kumar N. Development of amphotericin B loaded polymersomes based on (PEG)(3)-PLA co-polymers: Factors affecting size and in vitro evaluation. Eur J Pharm Sci 2010; 40:456-65. [PMID: 20580669 DOI: 10.1016/j.ejps.2010.05.005] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2010] [Revised: 04/18/2010] [Accepted: 05/09/2010] [Indexed: 12/16/2022]
Abstract
Amphotericin B (AmB) is a broad spectrum antifungal and antileishmenial agent and its clinical use is limited due to substantial dose limiting toxicities such as nephrotoxicity. In this work, amphotericin B is formulated in polymersomes of branched (PEG)(3)-PLA co-polymer. Polymersomes were prepared by solvent injection method and the effects of various formulation and process parameters on size and size distribution were studied. The results showed that viscosity of biphasic solution during formulation has significant influence on the size and size distribution of the polymersomes. Further, drug-loaded polymersomes with size of 199.6+/-14.1nm, PDI of 0.258+/-0.18, zeta potential (zeta) of -18.07+/-4.91mV and loading of 16.26+/-2.50% were obtained. Drug was found to be intercalated in the wall of polymersomes as observed using FITC tagged drug and CLSM study. An in vitro release media containing sodium deoxycholate was developed and a significant amount of drug release was observed up to 24h there after a very slow release was obtained. Free drug was not found in the formulation and different molecular forms of the drug (AmB) were observed by UV-visible spectroscopy and circular dichroism. This was further supported by hemolysis experiments, where negligible hemolysis in the test formulation was observed as compared to 100% hemolysis in a marketed formulation (Fungizone).
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Affiliation(s)
- Jay Prakash Jain
- Department of Pharmaceutics, National Institute of Pharmaceutical Education & Research, S.A.S. Nagar, India
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Bianco M, Gallarate M, Trotta M, Battaglia L. Amphotericin B loaded SLN prepared with the coacervation technique. J Drug Deliv Sci Technol 2010. [DOI: 10.1016/s1773-2247(10)50028-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Nune SK, Gunda P, Thallapally PK, Lin YY, Forrest ML, Berkland CJ. Nanoparticles for biomedical imaging. Expert Opin Drug Deliv 2009; 6:1175-94. [PMID: 19743894 PMCID: PMC3097035 DOI: 10.1517/17425240903229031] [Citation(s) in RCA: 242] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND Synthetic nanoparticles are emerging as versatile tools in biomedical applications, particularly in the area of biomedical imaging. Nanoparticles 1 - 100 nm in diameter have dimensions comparable to biological functional units. Diverse surface chemistries, unique magnetic properties, tunable absorption and emission properties, and recent advances in the synthesis and engineering of various nanoparticles suggest their potential as probes for early detection of diseases such as cancer. Surface functionalization has expanded further the potential of nanoparticles as probes for molecular imaging. OBJECTIVE To summarize emerging research of nanoparticles for biomedical imaging with increased selectivity and reduced nonspecific uptake with increased spatial resolution containing stabilizers conjugated with targeting ligands. METHODS This review summarizes recent technological advances in the synthesis of various nanoparticle probes, and surveys methods to improve the targeting of nanoparticles for their application in biomedical imaging. CONCLUSION Structural design of nanomaterials for biomedical imaging continues to expand and diversify. Synthetic methods have aimed to control the size and surface characteristics of nanoparticles to control distribution, half-life and elimination. Although molecular imaging applications using nanoparticles are advancing into clinical applications, challenges such as storage stability and long-term toxicology should continue to be addressed.
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Affiliation(s)
- Satish K Nune
- Pacific Northwest National Laboratory, 902 Battelle Boulevard, PO Box 999, MSIN K6-81, Richland, WA 99352, USA.
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Zhang S, Wang G, Lin X, Chatzinikolaidou M, Jennissen HP, Laub M, Uludağ H. Polyethylenimine-coated albumin nanoparticles for BMP-2 delivery. Biotechnol Prog 2009; 24:945-56. [PMID: 19194903 DOI: 10.1002/btpr.12] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Nanoparticle (NP)-based delivery has gained importance for improving the potency of therapeutic agents. The bovine serum albumin (BSA) NPs, obtained by a coacervation process, was modified by electrostatic adsorption of cationic polyethylenimine (PEI) to NP surfaces for delivery of bone-inducing growth factor, bone morphogenetic protein-2 (BMP-2). Different concentrations of PEI were utilized for coating BSA NPs to stabilize the colloidal system and to control the release of BMP-2. The NPs were characterized by size and zeta potential measurements, as well as by Scanning Electron Microscopy and Atomic Force Microscopy. The encapsulation efficiency was typically >90% in all NP preparations. In vitro release kinetics showed that the PEI concentration used for coating the NPs efficiently controlled the release of BMP-2, demonstrating a gradual slowing, sustained release pattern during a 10-day study period. The bioactivity of the encapsulated BMP-2 and the toxicity of the NPs were examined by the alkaline phosphatase (ALP) induction assay and the MTT assay, respectively, using C2C12 cells. The results indicated that PEI was the primary determinant of NP toxicities, and BSA NPs coated with 0.1 mg/mL PEI demonstrated tolerable toxicity, retained the bioactivity of BMP-2, and efficiently slowed the release rate of BMP-2. We conclude that BMP-2 encapsulated in BSA NPs might be an efficient way to deliver the protein for in vivo bone induction.
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Affiliation(s)
- Sufeng Zhang
- Faculty of Engineering, Dept. of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada
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Huang M, Berkland C. Controlled release of repifermin from polyelectrolyte complexes stimulates endothelial cell proliferation. J Pharm Sci 2009; 98:268-80. [PMID: 18425807 PMCID: PMC4126262 DOI: 10.1002/jps.21412] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The therapeutic value of many growth factors is often hindered by the narrow therapeutic index and sustained concentrations required for efficacy. Controlled release approaches provide a valuable tool to achieve these goals; however, growth factor stability must be maintained. Repifermin is a truncated form of fibroblast growth factor-10, also known as keratinocyte growth factor-2, that exhibits promise in wound healing applications; however, controlled release formulation presents a challenge for this labile protein. Taking advantage of the heparin-binding motif of this class of biopharmaceuticals, Repifermin was effectively stabilized and packaged in polyelectrolyte complexes. In the presence of dextran sulfate, the unfolding temperature of this growth factor was increased by approximately 10 degrees C as confirmed by a variety of spectroscopic techniques. Dextran sulfate with bound Repifermin was then complexed with several polycations (chitosan, poly-L-lysine, and polyethylenimine) resulting in the formation of approximately 250 nm polyelectrolyte complexes that entrapped the protein with approximately 70-80% efficiency. Release was controlled for more than 10 days and the mitogenic activity of Repifermin on human umbilical cord vascular endothelial cells was significantly enhanced, whereas no effect was noted for free Repifermin.
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Affiliation(s)
- Min Huang
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, KS 66047
| | - Cory Berkland
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, KS 66047
- Department of Chemical and Petroleum Engineering, The University of Kansas, Lawrence, KS 66047
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Bédié GK, Turgeon SL, Makhlouf J. Formation of native whey protein isolate–low methoxyl pectin complexes as a matrix for hydro-soluble food ingredient entrapment in acidic foods. Food Hydrocoll 2008. [DOI: 10.1016/j.foodhyd.2007.03.010] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Cordova M, Cheng M, Trejo J, Johnson SJ, Willhite GP, Liang JT, Berkland C. Delayed HPAM Gelation via Transient Sequestration of Chromium in Polyelectrolyte Complex Nanoparticles. Macromolecules 2008. [DOI: 10.1021/ma800211d] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mary Cordova
- Department of Chemical and Petroleum Engineering and Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66047
| | - Min Cheng
- Department of Chemical and Petroleum Engineering and Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66047
| | - Julieta Trejo
- Department of Chemical and Petroleum Engineering and Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66047
| | - Stephen J. Johnson
- Department of Chemical and Petroleum Engineering and Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66047
| | - G. Paul Willhite
- Department of Chemical and Petroleum Engineering and Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66047
| | - Jenn-Tai Liang
- Department of Chemical and Petroleum Engineering and Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66047
| | - Cory Berkland
- Department of Chemical and Petroleum Engineering and Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66047
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Vieira DB, Carmona-Ribeiro AM. Cationic nanoparticles for delivery of amphotericin B: preparation, characterization and activity in vitro. J Nanobiotechnology 2008; 6:6. [PMID: 18462496 PMCID: PMC2408927 DOI: 10.1186/1477-3155-6-6] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Accepted: 05/07/2008] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Particulate systems are well known to be able to deliver drugs with high efficiency and fewer adverse side effects, possibly by endocytosis of the drug carriers. On the other hand, cationic compounds and assemblies exhibit a general antimicrobial action. In this work, cationic nanoparticles built from drug, cationic lipid and polyelectrolytes are shown to be excellent and active carriers of amphotericin B against C. albicans. RESULTS Assemblies of amphotericin B and cationic lipid at extreme drug to lipid molar ratios were wrapped by polyelectrolytes forming cationic nanoparticles of high colloid stability and fungicidal activity against Candida albicans. Experimental strategy involved dynamic light scattering for particle sizing, zeta-potential analysis, colloid stability, determination of AmB aggregation state by optical spectra and determination of activity against Candida albicans in vitro from cfu countings. CONCLUSION Novel and effective cationic particles delivered amphotericin B to C. albicans in vitro with optimal efficiency seldom achieved from drug, cationic lipid or cationic polyelectrolyte in separate. The multiple assembly of antibiotic, cationic lipid and cationic polyelctrolyte, consecutively nanostructured in each particle produced a strategical and effective attack against the fungus cells.
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Affiliation(s)
- Débora B Vieira
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, CP 26077, CEP 05513-970, São Paulo, Brazil.
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Huang M, Huang ZL, Bilgen M, Berkland C. Magnetic resonance imaging of contrast-enhanced polyelectrolyte complexes. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2008; 4:30-40. [DOI: 10.1016/j.nano.2007.10.085] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2007] [Revised: 10/04/2007] [Accepted: 10/08/2007] [Indexed: 11/28/2022]
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Merchant SA, Glatzhofer DT, Schmidtke DW. Effects of electrolyte and pH on the behavior of cross-linked films of ferrocene-modified poly(ethylenimine). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:11295-302. [PMID: 17902716 DOI: 10.1021/la701521s] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Ferrocene redox polymers based on the coupling of ferrocenecarboxaldehyde to both linear and branched poly(ethylenimine) (PEI) have been prepared to investigate the effects of pH, electrolyte, and cross-linking on electron charge transport and film swelling. The redox behavior of both ferrocene-modified linear PEI and ferrocene-modified branched PEI was investigated by cyclic voltammetry, while electron diffusion coefficients reported for PEI-based redox polymers were determined by electrochemical impedance spectroscopy. In phosphate solutions at pH>7, cross-linked films of both redox polymers exhibited multiple redox wave behavior and were unstable. In contrast, in non-phosphate solutions, cross-linked films exhibited stable electrochemical behavior and fast electron transfer in solutions with pH<11. Gel swelling experiments suggested that the multiple wave behavior and instability exhibited in either phosphate solutions or at high pH in non-phosphate solutions were related to a combination of film collapse and electrolyte binding within the hydrogel. The electron diffusion coefficients for these polymers are on the order of 10-8 (mol cm(-2) s(-1/2)), which are approximately 40 times greater than other ferrocene-modified polymers. Incorporation of the enzyme, glucose oxidase, into these films demonstrated that these redox polymers were able to electrically communicate with the enzyme's flavin adenine dinucleotide (FAD) redox centers. Glucose sensors based on these films exhibited enzyme saturation current densities that ranged from 240 to 480 microA/cm2 in response to glucose, which were dependent upon the supporting electrolyte and pH. The sensitivity of these sensors at 5 mM glucose ranged from 10 to 48 microA.cm(-2).mM(-1).
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Affiliation(s)
- Stephen A Merchant
- Department of Chemistry and Biochemistry, University of Oklahoma Bioengineering Center, and School of Chemical, Biological, and Materials Engineering, University of Oklahoma, Norman, Oklahoma 73019, USA
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Drogoz A, David L, Rochas C, Domard A, Delair T. Polyelectrolyte complexes from polysaccharides: formation and stoichiometry monitoring. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:10950-8. [PMID: 17880248 DOI: 10.1021/la7008545] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Colloids were obtained from non-stoichiometric polyelectrolyte complexes with two polysaccharides of opposite charge: chitosan and dextran sulfate (DS) as the polycation and polyanion, respectively. The complexes were elaborated by a one-shot addition of the polymer in default to the one in excess. The colloids were positively or negatively charged according to the nature of the polymer in excess. Dynamic light scattering (DLS) demonstrated that particles were formed at a very early stage in the complexation process. The consumption of the excess polyelectrolyte was monitored with a dye assay specific for dextran sulfate (toluidine blue) or chitosan (orange II). From these experiments, two different mechanisms of colloidal PEC formation were evidenced, according to the nature of the polymer in excess. On adding chitosan to DS in excess, regular consumption of the polyanion was observed at a constant stoichiometry, in the 1.5 to 1.85 range (sulfate residues for one glucosamine group), according to the molar mass of the polycation. When DS was added to chitosan in excess, the overall stoichiometry varied from ca. 6 (glucosamine residues for one sulfate group) down to 1 as the charge molar mixing ratio R=n+/n- decreased from 20 to 1. The existence of various mechanisms, according to the nature of the polymer in excess, could be attributed to the differences in chemical reactivity (strong vs low) of the ion in excess and the conformation and flexibility of the macromolecular chains related to their electrostatic potential.
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Affiliation(s)
- Alexandre Drogoz
- Unité mixte CNRS-BioMérieux, UMR 2714, ENS Lyon, 46, allée d'Italie, 69364 Lyon Cedex 07, France
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Huang M, Vitharana SN, Peek LJ, Coop T, Berkland C. Polyelectrolyte Complexes Stabilize and Controllably Release Vascular Endothelial Growth Factor. Biomacromolecules 2007; 8:1607-14. [PMID: 17428030 DOI: 10.1021/bm061211k] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Angiogenesis has long been a desired therapeutic approach to improve clinical outcomes of conditions typified by ischemia. Vascular endothelial growth factor (VEGF) has demonstrated the ability to generate new blood vessels in vivo, but trials using intravenous delivery have not yet produced clinical success. Localized, sustained delivery of VEGF has been proven necessary to generate blood vessels as demonstrated by implantable, controlled release devices. Ultimately, nanoparticles delivered by intravenous injection may be designed to accumulate in target tissues and sustain the local VEGF concentration; however, injectable nanosuspensions that control the release of stabilized VEGF must first be developed. In this study, we utilize the heparin binding domain of VEGF to bind the polyanion dextran sulfate, resulting in an enhanced thermal stability of VEGF. Coacervation of the VEGF-bound dextran sulfate with selected polycations (chitosan, polyethylenimine, or poly-L-lysine) produced nanoparticles approximately 250 nm in diameter with high VEGF encapsulation efficiency (50-85%). Release of VEGF from these formulations persisted for >10 days and maintained high VEGF activity as determined by ELISA and a mitogenic bioassay. Chitosan-dextran sulfate complexes were preferred because of their biodegradability, desirable particle size ( approximately 250 nm), entrapment efficiency ( approximately 85%), controlled release (near linear for 10 days), and mitogenic activity.
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Affiliation(s)
- Min Huang
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, Kansas 66047, USA
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Nimesh S, Goyal A, Pawar V, Jayaraman S, Kumar P, Chandra R, Singh Y, Gupta KC. Polyethylenimine nanoparticles as efficient transfecting agents for mammalian cells. J Control Release 2005; 110:457-468. [PMID: 16325952 DOI: 10.1016/j.jconrel.2005.10.014] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2005] [Revised: 10/18/2005] [Accepted: 10/24/2005] [Indexed: 11/24/2022]
Abstract
Two cross-linkers based on polyethylene glycol (PEG) (MW=6 and 8 kDa), were synthesized for self-assembling and formation of nanoparticles of branched, high molecular weight polyethylenimine (PEI). Cross-linking was realized in two ways, viz., ionic as well as covalent. Ionic cross-linking was accomplished by using PEG-bis (phosphate) whereas, the covalent one was achieved by using PEG-bis (p-nitrophenylcarbonate). A range of nanoparticles of PEI was prepared by varying the degree of cross-linking (i.e. the amount of cross-linkers used). PEI-PEG nanoparticles were characterized by dynamic light scattering and transmission electron microscopy and found to be in the range of approximately 18-75 nm (hydrodynamic radii) with almost uniform population. Subsequently, these particles were used for DNA binding assay and zeta-potential measurements, taking native PEI-PEG nanoparticles as reference. As expected, the zeta potential values decreased, on increasing the percentage of cross-linking as well as on complexation with DNA. Further, PEI-PEG nanoparticles were investigated for their transfecting efficacy on COS-1 cells. It was found that PEI-PEG nanoparticles were 5- to 16-fold more efficient as transfecting agents compared to lipofectin and PEI itself. The toxicity of PEI-PEG nanoparticles was found to be reduced considerably in comparison to PEI polymer, as determined by MTT colorimetric assay. Out of the various systems prepared, PEI-PEG8000 (5% ionic) nanoparticles were found to be the most efficient transfecting agent for in vitro transfection.
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Affiliation(s)
- Surendra Nimesh
- Nucleic Acids Research Laboratory and Division of Allergy and Infectious Diseases, Institute of Genomics and Integrative Biology, Mall Road, Delhi University Campus, Delhi - 110 007, India
| | - Anita Goyal
- Nucleic Acids Research Laboratory and Division of Allergy and Infectious Diseases, Institute of Genomics and Integrative Biology, Mall Road, Delhi University Campus, Delhi - 110 007, India
| | - Vikas Pawar
- Unilever Research Centre, Bangalore - 560 066, India
| | | | - Pradeep Kumar
- Nucleic Acids Research Laboratory and Division of Allergy and Infectious Diseases, Institute of Genomics and Integrative Biology, Mall Road, Delhi University Campus, Delhi - 110 007, India
| | - Ramesh Chandra
- Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi - 110 007, India
| | - Yogendra Singh
- Nucleic Acids Research Laboratory and Division of Allergy and Infectious Diseases, Institute of Genomics and Integrative Biology, Mall Road, Delhi University Campus, Delhi - 110 007, India
| | - Kailash C Gupta
- Nucleic Acids Research Laboratory and Division of Allergy and Infectious Diseases, Institute of Genomics and Integrative Biology, Mall Road, Delhi University Campus, Delhi - 110 007, India.
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Lemke A, Kiderlen AF, Kayser O. Amphotericin B. Appl Microbiol Biotechnol 2005; 68:151-62. [PMID: 15821914 DOI: 10.1007/s00253-005-1955-9] [Citation(s) in RCA: 193] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2005] [Revised: 02/28/2005] [Accepted: 03/01/2005] [Indexed: 10/25/2022]
Abstract
Invasive fungal infections are a major cause of morbidity and mortality in immunodeficient individuals (such as AIDS patients) and in transplant recipients or tumor patients undergoing immunosuppressive chemotherapy. Amphotericin B is one of the oldest, yet most efficient antimycotic agents. However, its usefulness is limited due to dose-dependent side-effects, notably nephrotoxicity. In order to improve its safety margin, new pharmaceutical formulations of amphotericin B have been designed especially to reduce its detrimental effects on the kidneys. Since the 1980s, a wide variety of new amphotericin B formulations have been brought forward for clinical testing, many of which were approved and reached market value in the 1990s. This review describes and discusses the molecular genetics, pharmacological, toxicological, and clinical aspects of amphotericin B itself and many of its innovative formulations.
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Affiliation(s)
- A Lemke
- Institute of Pharmacy, Pharmaceutical Technology, Biotechnology, and Quality Management, Freie Universität Berlin, Berlin 12169, Germany
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Lakard B, Herlem G, Lakard S, Antoniou A, Fahys B. Urea potentiometric biosensor based on modified electrodes with urease immobilized on polyethylenimine films. Biosens Bioelectron 2004; 19:1641-7. [PMID: 15142598 DOI: 10.1016/j.bios.2003.12.035] [Citation(s) in RCA: 116] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2003] [Revised: 12/17/2003] [Accepted: 12/17/2003] [Indexed: 11/18/2022]
Abstract
The development of a new electrochemical sensor consisting in a glass-sealed metal microelectrode coated by a polyethylenimine film is described. The use of polymers as the entrapping matrix for enzymes fulfils all the requirements expected for these materials without damaging the biological material. Since enzyme immobilization plays a fundamental role in the performance characteristics of enzymatic biosensors, we have tested four different protocols for enzyme immobilization to determine the most reliable one. Thus the characteristics of the potentiometric biosensors assembled were studied and compared and it appeared that the immobilization method leading to the most efficient biosensors was the one consisting in a physical adsorption followed by reticulation with dilute aqueous glutaraldehyde solutions. Indeed, the glutaraldehyde immobilized urease sensor provides many advantages, compared to the other types of sensors, since this type of urea biosensor exhibits short response times (15-30s), sigmoidal responses for the urea concentration working range from 1 x 10(-2.5) to 1 x 10(-1.5) M and a lifetime of 4 weeks.
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Affiliation(s)
- Boris Lakard
- LCMI, Université de Franche-Comté, 16 route de Gray, 25030 Besançon Cédex, France.
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McCarron PA, Donnelly RF, Canning PE, McGovern JG, Jones DS. Bioadhesive, non-drug-loaded nanoparticles as modulators of candidal adherence to buccal epithelial cells: a potentially novel prophylaxis for candidosis. Biomaterials 2004; 25:2399-407. [PMID: 14741605 DOI: 10.1016/j.biomaterials.2003.09.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Adherence of microorganisms, such as Candida albicans, represents the initial step in the establishment of infection and, accordingly, modification of this step represents a method by which the incidence of infection may be reduced. Therefore, this study uniquely examined the effects of polymeric nanoparticles on the adherence of blastospores of C. albicans to human buccal epithelial cells (BEC) in vitro. Poly(propylcyanoacrylate) nanoparticles were produced by emulsion polymerisation using a range of anionic, cationic and non-ionic surfactants, their particle size and zeta potential characterised and incubated with stationary phase blastospores of C. albicans for a defined period. Following this, the surface properties and size of blastospores with adsorbed nanoparticles were characterised. phosphate buffered saline-treated and nanoparticle-treated blastospores were incubated with human BEC for 2 h, following which the number of adherent blastospores was enumerated by light microscopy. The size and zeta potential of the nanoparticles were dependent on the surfactant employed in the manufacture process. Following nanoparticle adsorption, alteration of the zeta potential and an increase in the diameter of blastospores were observed. However, as this increase in diameter was indirectly related to the size of the nanoparticles, this may indicate a preference for the adsorption of smaller particles. In addition, following nanoparticle adsorption, the cell surface hydrophobicity (CSH) of C. albicans blastospores was increased and, importantly, the subsequent adherence to BEC in vitro was reduced. Most notably, the adherence of blastospores that had been treated with nanoparticles (stabilised with docusate sodium) was circa 73% lower than that of untreated blastospores. A moderate correlation between increased CSH and reduced adherence and a low correlation between blastospore zeta potential and adherence were observed, inferring that other mechanisms, most likely stearic hindrance, are responsible for the antiadherent properties of adsorbed nanoparticles. In light of their ability to reduce candidal adherence to BEC, it is suggested that polymeric nanoparticles may be useful in the prophylaxis of candidosis of the oral cavity.
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Affiliation(s)
- Paul A McCarron
- School of Pharmacy, Queens University Belfast, Medical Biology Centre, Belfast, Antrim BT9 7BL, UK.
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