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Giacalone G, Quaillet M, Huang N, Nicolas V, Boulogne C, Gillet C, Fattal E, Bochot A, Hillaireau H. An injectable, nanostructured implant for the delivery of adenosine triphosphate: towards long-acting formulations of small, hydrophilic drugs. Drug Deliv Transl Res 2024; 14:2146-2157. [PMID: 38822092 DOI: 10.1007/s13346-024-01631-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/08/2024] [Indexed: 06/02/2024]
Abstract
While long-acting injectable treatments are gaining increasing interest in managing chronic diseases, the available drug delivery systems almost exclusively rely on hydrophobic matrixes, limiting their application to either hydrophobic drugs or large and hydrophilic molecules such as peptides. To address the technological lock for long-acting delivery systems tailored to small, hydrophilic drugs such as anticancer and antiviral nucleoside/nucleotide analogues, we have synthesized and characterized an original approach with a multi-scale structure: (i) a nucleotide (adenosine triphosphate, ATP) is first incorporated in hydrophilic chitosan-Fe(III) nanogels; (ii) these nanogels are then transferred by freeze-drying and resuspension into a water-free, hydrophobic medium containing PLGA and an organic solvent, N-methyl-2-pyrrolidone. We show that this specific association allows an injectable and homogeneous dispersion, able to form in situ implants upon injection in physiological or aqueous environments. This system releases ATP in vitro without any burst effect in a two-step mechanism, first as nanogels acting as an intermediate reservoir over a week, then as free drug over several weeks. In vivo studies confirmed the potential of such nanostructured implants for sustained drug release following subcutaneous injection to mice hock, opening perspectives for sustained and targeted delivery through the lymphatic system.
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Affiliation(s)
- Giovanna Giacalone
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, Orsay, 91400, France
| | - Marion Quaillet
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, Orsay, 91400, France
| | - Nicolas Huang
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, Orsay, 91400, France
| | - Valérie Nicolas
- Université Paris-Saclay, MIPSIT Microscopy Facility, IPSIT, Orsay, 91400, France
- Light Microscopy Facility Imagerie-Gif, CNRS - I2BC (present address), Gif-sur-Yvette, 91198, France
| | - Claire Boulogne
- Electron Microscopy Facility, Imagerie-Gif, Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, Gif-sur-Yvette, 91198, France
| | - Cynthia Gillet
- Electron Microscopy Facility, Imagerie-Gif, Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, Gif-sur-Yvette, 91198, France
| | - Elias Fattal
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, Orsay, 91400, France
| | - Amélie Bochot
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, Orsay, 91400, France
| | - Hervé Hillaireau
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, Orsay, 91400, France.
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2
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Rezaei B, Harun A, Wu X, Iyer PR, Mostufa S, Ciannella S, Karampelas IH, Chalmers J, Srivastava I, Gómez-Pastora J, Wu K. Effect of Polymer and Cell Membrane Coatings on Theranostic Applications of Nanoparticles: A Review. Adv Healthc Mater 2024:e2401213. [PMID: 38856313 DOI: 10.1002/adhm.202401213] [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: 04/01/2024] [Revised: 05/28/2024] [Indexed: 06/11/2024]
Abstract
The recent decade has witnessed a remarkable surge in the field of nanoparticles, from their synthesis, characterization, and functionalization to diverse applications. At the nanoscale, these particles exhibit distinct physicochemical properties compared to their bulk counterparts, enabling a multitude of applications spanning energy, catalysis, environmental remediation, biomedicine, and beyond. This review focuses on specific nanoparticle categories, including magnetic, gold, silver, and quantum dots (QDs), as well as hybrid variants, specifically tailored for biomedical applications. A comprehensive review and comparison of prevalent chemical, physical, and biological synthesis methods are presented. To enhance biocompatibility and colloidal stability, and facilitate surface modification and cargo/agent loading, nanoparticle surfaces are coated with different synthetic polymers and very recently, cell membrane coatings. The utilization of polymer- or cell membrane-coated nanoparticles opens a wide variety of biomedical applications such as magnetic resonance imaging (MRI), hyperthermia, photothermia, sample enrichment, bioassays, drug delivery, etc. With this review, the goal is to provide a comprehensive toolbox of insights into polymer or cell membrane-coated nanoparticles and their biomedical applications, while also addressing the challenges involved in translating such nanoparticles from laboratory benchtops to in vitro and in vivo applications. Furthermore, perspectives on future trends and developments in this rapidly evolving domain are provided.
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Affiliation(s)
- Bahareh Rezaei
- Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, TX, 79409, United States
| | - Asma Harun
- Department of Mechanical Engineering, Texas Tech University, Lubbock, TX, 79409, United States
- Texas Center for Comparative Cancer Research (TC3R), Amarillo, Texas, 79106, United States
| | - Xian Wu
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, 43210, United States
| | - Poornima Ramesh Iyer
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, 43210, United States
| | - Shahriar Mostufa
- Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, TX, 79409, United States
| | - Stefano Ciannella
- Department of Chemical Engineering, Texas Tech University, Lubbock, TX, 79409, United States
| | | | - Jeffrey Chalmers
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, 43210, United States
| | - Indrajit Srivastava
- Department of Mechanical Engineering, Texas Tech University, Lubbock, TX, 79409, United States
- Texas Center for Comparative Cancer Research (TC3R), Amarillo, Texas, 79106, United States
| | - Jenifer Gómez-Pastora
- Department of Chemical Engineering, Texas Tech University, Lubbock, TX, 79409, United States
| | - Kai Wu
- Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, TX, 79409, United States
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3
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Tiryaki E, Zorlu T. Recent Advances in Metallic Nanostructures-assisted Biosensors for Medical Diagnosis and Therapy. Curr Top Med Chem 2024; 24:930-951. [PMID: 38243934 DOI: 10.2174/0115680266282489240109050225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 12/15/2023] [Accepted: 12/27/2023] [Indexed: 01/22/2024]
Abstract
The field of nanotechnology has witnessed remarkable progress in recent years, particularly in its application to medical diagnosis and therapy. Metallic nanostructures-assisted biosensors have emerged as a powerful and versatile platform, offering unprecedented opportunities for sensitive, specific, and minimally invasive diagnostic techniques, as well as innovative therapeutic interventions. These biosensors exploit the molecular interactions occurring between biomolecules, such as antibodies, enzymes, aptamers, or nucleic acids, and metallic surfaces to induce observable alterations in multiple physical attributes, encompassing electrical, optical, colorimetric, and electrochemical signals. These interactions yield measurable data concerning the existence and concentration of particular biomolecules. The inherent characteristics of metal nanostructures, such as conductivity, plasmon resonance, and catalytic activity, serve to amplify both sensitivity and specificity in these biosensors. This review provides an in-depth exploration of the latest advancements in metallic nanostructures-assisted biosensors, highlighting their transformative impact on medical science and envisioning their potential in shaping the future of personalized healthcare.
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Affiliation(s)
- Ecem Tiryaki
- Nanomaterials for Biomedical Applications, Italian Institute of Technology, 16163, Genova, Italy
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, 34220, Esenler, Istanbul, Turkey
| | - Tolga Zorlu
- Department of Physical and Inorganic Chemistry, Universitat Rovira i Virgili, Carrer de Marcel∙lí Domingo s/n, 43007, Tarragona, Spain
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Sia CS, Lim HP, Lin YN, Beh LC, Tey BT, Goh BH, Low LE. pH-controllable stability of iron oxide@chitosan nanocomposite-stabilized magnetic Pickering emulsions. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Response of the Endogenous Antioxidant Defense System Induced in RAW 264.7 Macrophages upon Exposure to Dextran-Coated Iron Oxide Nanoparticles. Pharmaceutics 2023; 15:pharmaceutics15020552. [PMID: 36839874 PMCID: PMC9967892 DOI: 10.3390/pharmaceutics15020552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 01/31/2023] [Accepted: 02/04/2023] [Indexed: 02/10/2023] Open
Abstract
Presently, iron oxide nanoparticles are the only ones approved for clinical use as contrast agents in magnetic resonance imaging (MRI). Even though there is a high demand for these types of nanoparticles both for clinical use as well as for research, there are difficulties in obtaining stable nanoparticles with reproducible properties. In this context, in this study, we report the obtaining by an adapted coprecipitation method of dextran-coated maghemite nanoparticles (ɤ-Fe2O3 NPs). The morphology and structure of the dextran-coated maghemite nanoparticles (ɤ-Fe2O3 NPs) were determined using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The TEM and SEM micrographs highlighted the obtaining of particles of nanometric size and spherical shape morphology. Furthermore, the high-resolution transmission electron microscopy (HRTEM), as well as selected area diffraction (SAED), revealed that the obtained samples presented the structure of cubic maghemite. In this study, we also explored the effects of the co-precipitation synthesized dextran-coated maghemite nanoparticles (ɤ-Fe2O3 NPs) on the redox status of macrophages. For cytotoxicity evaluation of these NPs, murine macrophages (RAW 264.7 cell line) were exposed to different concentrations of dextran-coated maghemite nanoparticles (ɤ-Fe2O3 NPs) corresponding to 0-500 μg Fe3+/mL and incubated for 24, 48, and 72 h. Intracellular iron uptake, changes in the oxidative stress parameters (reactive oxygen species production and malondialdehyde level), and the activity of antioxidant enzymes, as well as GSH concentration in cells, were evaluated after incubation with a lower (50 μg Fe3+/mL) and higher (500 μg Fe3+/mL) dose of NPs. The results indicated a significant decrease in RAW 264.7 cell viability after 72 h in the presence of NPs at concentrations above 25 μg Fe3+/mL. An important accumulation of NPs, dependent on dose and exposure time, was detected in macrophages, but it induced only a limited raise in the oxidative status. We showed here that the antioxidant capacity of RAW 264.7 macrophages was efficient in counteracting dextran-coated maghemite nanoparticles (ɤ-Fe2O3 NPs) toxicity even at higher doses.
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In Vitro and In Vivo Biological Assays of Dextran Coated Iron Oxide Aqueous Magnetic Fluids. Pharmaceutics 2023; 15:pharmaceutics15010177. [PMID: 36678806 PMCID: PMC9865434 DOI: 10.3390/pharmaceutics15010177] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/27/2022] [Accepted: 12/30/2022] [Indexed: 01/05/2023] Open
Abstract
The iron oxide nanoparticles coated with different surface coatings were studied and characterized by multiple physicochemical and biological methods. The present paper aims at estimating the toxicity in vitro and in vivo of dextran coated iron oxide aqueous magnetic fluids. The in vitro studies were conducted by quantifying the viability of HeLa cells after their incubation with the samples (concentrations of 62.5−125−250−500 μg/mL at different time intervals). The estimation of the toxicity in vivo of administering dextran coated iron oxide aqueous magnetic fluids (DIO-AMF) with hydrodynamic diameter of 25.73 ± 4 nm to Male Brown Norway rats has been made. Different concentrations (62.5−125−250−500 μg/mL) of dextran coated iron oxide aqueous magnetic fluids were administered for 7 consecutive days. Hematology and biochemistry of the Male Brown Norway rats assessment was performed at various time intervals (24−72 h and 21−28 days) after intra-peritoneal injection. The results showed that high concentrations of DIO-AMF (250 and 500 μg/mL) significantly increased white blood cells, red blood cells, hemoglobin and hematocrit compared to the values obtained for the control group (p < 0.05). Moreover, following the administration of DIO-AMF, the levels of alkaline phosphatase and aspartate aminotransferase increased compared to the control group (p < 0.05). After DIO-AMF administration, no significant difference was observed in the levels of alanine aminotransferase, gamma-glutamyl transpeptidase, urea and creatinine compared to the control group (p < 0.05). The results of the present study showed that dextran coated iron oxide aqueous magnetic fluids in concentrations lower than 250 μg/mL are reliable for medical and pharmaceutical applications.
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Laha SS, Thorat ND, Singh G, Sathish CI, Yi J, Dixit A, Vinu A. Rare-Earth Doped Iron Oxide Nanostructures for Cancer Theranostics: Magnetic Hyperthermia and Magnetic Resonance Imaging. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2104855. [PMID: 34874618 DOI: 10.1002/smll.202104855] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 10/11/2021] [Indexed: 05/27/2023]
Abstract
Superparamagnetic iron oxide nanoparticles (SPIONs) have been extensively investigated during the last couple of decades because of their potential applications across various disciplines ranging from spintronics to nanotheranostics. However, pure iron oxide nanoparticles cannot meet the requirement for practical applications. Doping is considered as one of the most prominent and simplest techniques to achieve optimized multifunctional properties in nanomaterials. Doped iron oxides, particularly, rare-earth (RE) doped nanostructures have shown much-improved performance for a wide range of biomedical applications, including magnetic hyperthermia and magnetic resonance imaging (MRI), compared to pure iron oxide. Extensive investigations have revealed that bigger-sized RE ions possessing high magnetic moment and strong spin-orbit coupling can serve as promising dopants to significantly regulate the properties of iron oxides for advanced biomedical applications. This review provides a detailed investigation on the role of RE ions as primary dopants for engineering the structural and magnetic properties of Fe3 O4 nanoparticles to carefully introspect and correlate their impact on cancer theranostics with a special focus on magnetic hyperthermia and MRI. In addition, prospects for achieving high-performance magnetic hyperthermia and MRI are thoroughly discussed. Finally, suggestions on future work in these two areas are also proposed.
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Affiliation(s)
- Suvra S Laha
- Department of Physics and Astronomy, Wayne State University, Detroit, MI, 48201, USA
- Centre for Nano Science and Engineering (CeNSE), Indian Institute of Science, Bangalore, 560012, India
| | - Nanasaheb D Thorat
- Nuffield Department of Women's & Reproductive Health, Medical Sciences Division, University of Oxford, Oxford, OX3 9DU, UK
| | - Gurwinder Singh
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - C I Sathish
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Jiabao Yi
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Ambesh Dixit
- Department of Physics, Indian Institute of Technology, Jodhpur, 342037, India
| | - Ajayan Vinu
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW, 2308, Australia
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Afrin H, Salazar CJ, Kazi M, Ahamad SR, Alharbi M, Nurunnabi M. Methods of screening, monitoring and management of cardiac toxicity induced by chemotherapeutics. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.01.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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9
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Rahman MA, Ochiai B. A facile aqueous production of bisphosphonated-polyelectrolyte functionalized magnetite nanoparticles for pH-specific targeting of acidic-bone cells. RSC Adv 2022; 12:8043-8058. [PMID: 35424742 PMCID: PMC8982438 DOI: 10.1039/d1ra09445a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 03/04/2022] [Indexed: 11/28/2022] Open
Abstract
Bone malignancy treatment is being hindered due to the insufficient selectivity of therapeutic nanoparticles towards malignant bone sites. Polyelectrolyte functionalized magnetic nanoparticles having dually specific pH-sensing ability and bisphosphonate moieties, can be an effective solution for selective targeting of bone malignancies. First, polyelectrolyte was prepared via N-carboxycitraconyzation of chitosan (NCCS) followed by successive functionalization with alendronic acid (AL) and fluorescein isothiocyanate (FITC). Then, Fe3O4-NCCS-FITC-AL nanoparticles were synthesized by a facile one-step microwave-assisted aqueous method via in situ surface functionalization. The formation, crystal structure, and surface conjugation of Fe3O4 nanoparticles with polyelectrolytic stabilizer were confirmed by Fourier transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analyses. Synthesized Fe3O4-NCCS-FITC-AL nanoparticles were superparamagnetic, colloidally stable and highly hemocompatible under physiological conditions. Moreover, at pH 5.0, Fe3O4-NCCS-FITC-AL nanoparticles formed a precipitate due to inversion of their surface charge. This pH-dependent charge-inversion drastically changed the interactions with erythrocytes and bones. Selective membranolysis of erythrocytes occurred at pH 5.0. The designed nanoparticles showed enough potential for selective targeting of pathological bone sites in early-stage magnetofluorescent imaging and as a therapeutics carrier to treat malignant bone diseases. Synthesis of a bisphosphonated polyelectrolytic stabilizer to in situ fabricate and functionalize Fe3O4 nanoparticles and their pH-dependent hemolysis and bone-cell adhesion.![]()
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Affiliation(s)
- Md. Abdur Rahman
- Department of Chemistry and Chemical Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16, Jonan, Yonezawa, Yamagata 992-8510, Japan
- Polymer Colloids and Nanomaterials Lab, Department of Chemistry, Faculty of Science, Rajshahi University, Rajshahi 6205, Bangladesh
| | - Bungo Ochiai
- Department of Chemistry and Chemical Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16, Jonan, Yonezawa, Yamagata 992-8510, Japan
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Recent development for biomedical applications of magnetic nanoparticles. INORG CHEM COMMUN 2021; 134:108995. [PMID: 34658663 PMCID: PMC8500685 DOI: 10.1016/j.inoche.2021.108995] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 10/05/2021] [Accepted: 10/06/2021] [Indexed: 11/20/2022]
Abstract
In recent decades, the use of engineered nanoparticles has been increasing in various sectors, including biomedicine, diagnosis, water treatment, and environmental remediation leading to significant public concerns. Among these nanoparticles, magnetic nanoparticles (MNPs) have gained many attentions in medicine, pharmacology, drug delivery system, molecular imaging, and bio-sensing due to their various properties. In addition, various studies have reviewed MNPs main applications in the biomedical engineering area with intense progress and recent achievements. Nanoparticles, especially the magnetic nanoparticles, have recently been confirmed with excellent antiviral activity against different viruses, including SARS-CoV-2(Covid-19) and their recent development against Covid-19 also has also been discussed. This review aims to highlight the recent development of the magnetic nanoparticles and their biomedical applications such as diagnosis of diseases, molecular imaging, hyperthermia, bio-sensing, gene therapy, drug delivery and the diagnosis of Covid-19.
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Caldeirão ACM, Araujo HC, Tomasella CM, Sampaio C, dos Santos Oliveira MJ, Ramage G, Pessan JP, Monteiro DR. Effects of Antifungal Carriers Based on Chitosan-Coated Iron Oxide Nanoparticles on Microcosm Biofilms. Antibiotics (Basel) 2021; 10:antibiotics10050588. [PMID: 34067527 PMCID: PMC8155828 DOI: 10.3390/antibiotics10050588] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/13/2021] [Accepted: 05/13/2021] [Indexed: 12/21/2022] Open
Abstract
Resistance of Candida species to conventional therapies has motivated the development of antifungal nanocarriers based on iron oxide nanoparticles (IONPs) coated with chitosan (CS). This study evaluates the effects of IONPs-CS as carriers of miconazole (MCZ) or fluconazole (FLZ) on microcosm biofilms. Pooled saliva from two healthy volunteers supplemented with C. albicans and C. glabrata was the inoculum for biofilm formation. Biofilms were formed for 96 h on coverslips using the Amsterdam Active Attachment model, followed by 24 h treatment with nanocarriers containing different concentrations of each antifungal (78 and 156 µg/mL). MCZ or FLZ (156 µg/mL), and untreated biofilms were considered as controls. Anti-biofilm effects were evaluated by enumeration of colony-forming units (CFUs), composition of the extracellular matrix, lactic acid production, and structure and live/dead biofilm cells (confocal laser scanning microscopy-CLSM). Data were analyzed by one-way ANOVA and Fisher LSD's test (α = 0.05). IONPs-CS carrying MCZ or FLZ were the most effective treatments in reducing CFUs compared to either an antifungal agent alone for C. albicans and MCZ for C. glabrata. Significant reductions in mutans streptococci and Lactobacillus spp. were shown, though mainly for the MCZ nanocarrier. Antifungals and their nanocarriers also showed significantly higher proportions of dead cells compared to untreated biofilm by CLSM (p < 0.001), and promoted significant reductions in lactic acid, while simultaneously showing increases in some components of the extracellular matrix. These findings reinforce the use of nanocarriers as effective alternatives to fight oral fungal infections.
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Affiliation(s)
- Anne Caroline Morais Caldeirão
- Graduate Program in Dentistry (GPD-Master’s Degree), University of Western São Paulo (UNOESTE), Presidente Prudente 19050-920, Brazil;
| | - Heitor Ceolin Araujo
- Department of Preventive and Restorative Dentistry, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Araçatuba 16015-050, Brazil; (H.C.A.); (C.S.); (J.P.P.)
| | - Camila Miranda Tomasella
- School of Dentistry, University of Western São Paulo (UNOESTE), Presidente Prudente 19050-920, Brazil;
| | - Caio Sampaio
- Department of Preventive and Restorative Dentistry, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Araçatuba 16015-050, Brazil; (H.C.A.); (C.S.); (J.P.P.)
| | - Marcelo José dos Santos Oliveira
- Department of Physics, School of Technology and Applied Sciences (FCT), São Paulo State University (Unesp), Presidente Prudente 19060-900, Brazil;
| | - Gordon Ramage
- Oral Sciences Research Group, Glasgow Dental School, School of Medicine, Dentistry and Nursing, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G2 3JZ, UK;
| | - Juliano Pelim Pessan
- Department of Preventive and Restorative Dentistry, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Araçatuba 16015-050, Brazil; (H.C.A.); (C.S.); (J.P.P.)
| | - Douglas Roberto Monteiro
- Graduate Program in Dentistry (GPD-Master’s Degree), University of Western São Paulo (UNOESTE), Presidente Prudente 19050-920, Brazil;
- Department of Preventive and Restorative Dentistry, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Araçatuba 16015-050, Brazil; (H.C.A.); (C.S.); (J.P.P.)
- Correspondence: or ; Tel.: +55-18-3229-1000
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12
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Araujo HC, Arias LS, Caldeirão ACM, Assumpção LCDF, Morceli MG, de Souza Neto FN, de Camargo ER, Oliveira SHP, Pessan JP, Monteiro DR. Novel Colloidal Nanocarrier of Cetylpyridinium Chloride: Antifungal Activities on Candida Species and Cytotoxic Potential on Murine Fibroblasts. J Fungi (Basel) 2020; 6:jof6040218. [PMID: 33053629 PMCID: PMC7712500 DOI: 10.3390/jof6040218] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 10/09/2020] [Accepted: 10/09/2020] [Indexed: 12/11/2022] Open
Abstract
Nanocarriers have been used as alternative tools to overcome the resistance of Candida species to conventional treatments. This study prepared a nanocarrier of cetylpyridinium chloride (CPC) using iron oxide nanoparticles (IONPs) conjugated with chitosan (CS), and assessed its antifungal and cytotoxic effects. CPC was immobilized on CS-coated IONPs, and the nanocarrier was physico-chemically characterized. Antifungal effects were determined on planktonic cells of Candida albicans and Candida glabrata (by minimum inhibitory concentration (MIC) assays) and on single- and dual-species biofilms of these strains (by quantification of cultivable cells, total biomass and metabolic activity). Murine fibroblasts were exposed to different concentrations of the nanocarrier, and the cytotoxic effect was evaluated by MTT reduction assay. Characterization methods confirmed the presence of a nanocarrier smaller than 313 nm. IONPs-CS-CPC and free CPC showed the same MIC values (0.78 µg mL−1). CPC-containing nanocarrier at 78 µg mL−1 significantly reduced the number of cultivable cells for all biofilms, surpassing the effect promoted by free CPC. For total biomass, metabolic activity, and cytotoxic effects, the nanocarrier and free CPC produced statistically similar outcomes. In conclusion, the IONPs-CS-CPC nanocarrier was more effective than CPC in reducing the cultivable cells of Candida biofilms without increasing the cytotoxic effects of CPC, and may be a useful tool for the treatment of oral fungal infections.
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Affiliation(s)
- Heitor Ceolin Araujo
- Department of Preventive and Restorative Dentistry, School of Dentistry, Araçatuba, São Paulo State University (UNESP), Araçatuba SP 16015-050, Brazil; (H.C.A.); (L.S.A.); (F.N.d.S.N.); (J.P.P.)
| | - Laís Salomão Arias
- Department of Preventive and Restorative Dentistry, School of Dentistry, Araçatuba, São Paulo State University (UNESP), Araçatuba SP 16015-050, Brazil; (H.C.A.); (L.S.A.); (F.N.d.S.N.); (J.P.P.)
| | - Anne Caroline Morais Caldeirão
- Graduate Program in Dentistry (GPD—Master’s Degree), University of Western São Paulo (UNOESTE), Presidente Prudente SP 19050-920, Brazil;
| | - Lanay Caroline de Freitas Assumpção
- School of Dentistry, Presidente Prudente, University of Western São Paulo (UNOESTE), Presidente Prudente SP 19050-920, Brazil; (L.C.d.F.A.); (M.G.M.)
| | - Marcela Grigoletto Morceli
- School of Dentistry, Presidente Prudente, University of Western São Paulo (UNOESTE), Presidente Prudente SP 19050-920, Brazil; (L.C.d.F.A.); (M.G.M.)
| | - Francisco Nunes de Souza Neto
- Department of Preventive and Restorative Dentistry, School of Dentistry, Araçatuba, São Paulo State University (UNESP), Araçatuba SP 16015-050, Brazil; (H.C.A.); (L.S.A.); (F.N.d.S.N.); (J.P.P.)
| | | | - Sandra Helena Penha Oliveira
- Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba SP 16015-050, Brazil;
| | - Juliano Pelim Pessan
- Department of Preventive and Restorative Dentistry, School of Dentistry, Araçatuba, São Paulo State University (UNESP), Araçatuba SP 16015-050, Brazil; (H.C.A.); (L.S.A.); (F.N.d.S.N.); (J.P.P.)
| | - Douglas Roberto Monteiro
- Graduate Program in Dentistry (GPD—Master’s Degree), University of Western São Paulo (UNOESTE), Presidente Prudente SP 19050-920, Brazil;
- School of Dentistry, Presidente Prudente, University of Western São Paulo (UNOESTE), Presidente Prudente SP 19050-920, Brazil; (L.C.d.F.A.); (M.G.M.)
- Correspondence: or ; Tel.: +55-18-3229-1000
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13
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Jayaraj S, Egodage SM, Walpalage S. New approach for preparation of dry natural rubber nanocomposites through acid-free co-coagulation: Effect of organoclay content. J Appl Polym Sci 2018. [DOI: 10.1002/app.46502] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- S. Jayaraj
- Department of Chemical and Process Engineering; University of Moratuwa; Moratuwa 10400 Sri Lanka
| | - S. M. Egodage
- Department of Chemical and Process Engineering; University of Moratuwa; Moratuwa 10400 Sri Lanka
| | - S. Walpalage
- Department of Chemical and Process Engineering; University of Moratuwa; Moratuwa 10400 Sri Lanka
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Investigation of antifouling and disinfection potential of chitosan coated iron oxide-PAN hollow fiber membrane using Gram-positive and Gram-negative bacteria. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:133-148. [DOI: 10.1016/j.msec.2017.02.039] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 11/29/2016] [Accepted: 02/07/2017] [Indexed: 01/16/2023]
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15
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Gandhi S, Arami H, Krishnan KM. Detection of Cancer-Specific Proteases Using Magnetic Relaxation of Peptide-Conjugated Nanoparticles in Biological Environment. NANO LETTERS 2016; 16:3668-3674. [PMID: 27219521 DOI: 10.1021/acs.nanolett.6b00867] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Protease expression is closely linked to malignant phenotypes of different solid tumors; as such, their detection is promising for diagnosis and treatment of cancers, Alzheimer's, and vascular diseases. Here, we describe a new method for detecting proteases by sensitively monitoring the magnetic relaxation of monodisperse iron oxide nanoparticles (IONPs) using magnetic particle spectrometer (MPS). In this assay, tailored peptides functioning as activatable nanosensors link magnetic nanoparticles and possess selective sites that are recognizeable and cleaveable by specific proteases. When these linker peptides, labeled with biotin at N- and C-terminals, are added to the neutravidin functionalized IONPs, nanoparticles aggregate, resulting in well-defined changes in the MPS signal. However, as designed, in the presence of proteases these peptides are cleaved at predetermined sites, redispersing IONPs, and returning the MPS signal(s) close to its preaggregation state. These changes observed in all aspects of the MPS signal (peak intensity, its position as a function of field amplitude, and full width at half-maximum-when combined, these three also eliminate false positives), help to detect specific proteases, relying only on the magnetic relaxation characteristics of the functionalized nanoparticles. We demonstrate the general utility of this assay by detecting one each from the two general classes of proteases: trypsin (digestive serine protease, involved in various cancers, promoting proliferation, invasion, and metastasis) and matrix metalloproteinase (MMP-2, observed through metastasis and tumor angiogenesis). This MPS based protease-assay is rapid, reproducible, and highly sensitive and can form the basis of a feasible, high-throughput method for detection of various other proteases.
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Affiliation(s)
- Sonu Gandhi
- Materials Science & Engineering Department, University of Washington , Seattle, Washington 98195-2120 United States
| | - Hamed Arami
- Materials Science & Engineering Department, University of Washington , Seattle, Washington 98195-2120 United States
| | - Kannan M Krishnan
- Materials Science & Engineering Department, University of Washington , Seattle, Washington 98195-2120 United States
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16
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Them K, Kaul MG, Jung C, Hofmann M, Mummert T, Werner F, Knopp T. Sensitivity Enhancement in Magnetic Particle Imaging by Background Subtraction. IEEE TRANSACTIONS ON MEDICAL IMAGING 2016; 35:893-900. [PMID: 26599700 DOI: 10.1109/tmi.2015.2501462] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Biomedical applications such as cell tracking and angiography require the detection of low concentrations of superparamagnetic iron oxide nanoparticles (SPIOs) for imaging purposes. Magnetic particle imaging (MPI) is a new technology which enables the quantitative and time-resolved localization of SPIO distributions. However, the minimum concentration at which the SPIOs can be reconstructed with a suitable quality still remains to be investigated. In this work we examine the background signals in raw data that were measured without any SPIOs in the scanner tube. We show that a background subtraction in combination with a frequency cutoff for the dynamic part of the background signal lowers the detection limit for SPIOs in MPI up to a factor of ten. In-vivo mouse experiments show that for early time points from when the tracer enters the vena cava a reconstructed image of sufficient quality can only be obtained when a background subtraction is performed.
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17
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Arami H, Khandhar A, Liggitt D, Krishnan KM. In vivo delivery, pharmacokinetics, biodistribution and toxicity of iron oxide nanoparticles. Chem Soc Rev 2015; 44:8576-607. [PMID: 26390044 PMCID: PMC4648695 DOI: 10.1039/c5cs00541h] [Citation(s) in RCA: 492] [Impact Index Per Article: 54.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Iron oxide nanoparticles (IONPs) have been extensively used during the last two decades, either as effective bio-imaging contrast agents or as carriers of biomolecules such as drugs, nucleic acids and peptides for controlled delivery to specific organs and tissues. Most of these novel applications require elaborate tuning of the physiochemical and surface properties of the IONPs. As new IONPs designs are envisioned, synergistic consideration of the body's innate biological barriers against the administered nanoparticles and the short and long-term side effects of the IONPs become even more essential. There are several important criteria (e.g. size and size-distribution, charge, coating molecules, and plasma protein adsorption) that can be effectively tuned to control the in vivo pharmacokinetics and biodistribution of the IONPs. This paper reviews these crucial parameters, in light of biological barriers in the body, and the latest IONPs design strategies used to overcome them. A careful review of the long-term biodistribution and side effects of the IONPs in relation to nanoparticle design is also given. While the discussions presented in this review are specific to IONPs, some of the information can be readily applied to other nanoparticle systems, such as gold, silver, silica, calcium phosphates and various polymers.
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Affiliation(s)
- Hamed Arami
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington, 98195
| | - Amit Khandhar
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington, 98195
| | - Denny Liggitt
- Department of Comparative Medicine, University of Washington School of Medicine, Seattle, Washington, 98195
| | - Kannan M. Krishnan
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington, 98195
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18
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Chitosan coatings to control release and target tissues for therapeutic delivery. Ther Deliv 2015; 6:855-71. [DOI: 10.4155/tde.15.31] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The natural biopolymer chitosan has versatile applications in therapeutic delivery. Coating drug delivery matrices or biomaterials with chitosan offers several advantages in drug delivery, including control of drug release, slowing degradation rate and improving biocompatibility. Advanced uses of chitosan in coating form include targeting drug delivery vehicles to specific tissue as well as providing a stimulus-controlled release response. The present review summarizes the current applications of chitosan coatings in the context of different biomaterial delivery technologies, as well as future directions of chitosan coatings for drug delivery technologies under development.
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19
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Polysaccharide-Coated Magnetic Nanoparticles for Imaging and Gene Therapy. BIOMED RESEARCH INTERNATIONAL 2015; 2015:959175. [PMID: 26078971 PMCID: PMC4452369 DOI: 10.1155/2015/959175] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 08/20/2014] [Indexed: 02/08/2023]
Abstract
Today, nanotechnology plays a vital role in biomedical applications, especially for the diagnosis and treatment of various diseases. Among the many different types of fabricated nanoparticles, magnetic metal oxide nanoparticles stand out as unique and useful tools for biomedical applications, because of their imaging characteristics and therapeutic properties such as drug and gene carriers. Polymer-coated magnetic particles are currently of particular interest to investigators in the fields of nanobiomedicine and fundamental biomaterials. Theranostic magnetic nanoparticles that are encapsulated or coated with polymers not only exhibit imaging properties in response to stimuli, but also can efficiently deliver various drugs and therapeutic genes. Even though a large number of polymer-coated magnetic nanoparticles have been fabricated over the last decade, most of these have only been used for imaging purposes. The focus of this review is on polysaccharide-coated magnetic nanoparticles used for imaging and gene delivery.
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20
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Arami H, Khandhar AP, Tomitaka A, Yu E, Goodwill PW, Conolly SM, Krishnan KM. In vivo multimodal magnetic particle imaging (MPI) with tailored magneto/optical contrast agents. Biomaterials 2015; 52:251-61. [PMID: 25818431 DOI: 10.1016/j.biomaterials.2015.02.040] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 01/30/2015] [Accepted: 02/06/2015] [Indexed: 12/31/2022]
Abstract
Magnetic Particle Imaging (MPI) is a novel non-invasive biomedical imaging modality that uses safe magnetite nanoparticles as tracers. Controlled synthesis of iron oxide nanoparticles (NPs) with tuned size-dependent magnetic relaxation properties is critical for the development of MPI. Additional functionalization of these NPs for other imaging modalities (e.g. MRI and fluorescent imaging) would accelerate screening of the MPI tracers based on their in vitro and in vivo performance in pre-clinical trials. Here, we conjugated two different types of poly-ethylene-glycols (NH2-PEG-NH2 and NH2-PEG-FMOC) to monodisperse carboxylated 19.7 nm NPs by amide bonding. Further, we labeled these NPs with Cy5.5 near infra-red fluorescent (NIRF) molecules. Bi-functional PEG (NH2-PEG-NH2) resulted in larger hydrodynamic size (∼98 nm vs. ∼43 nm) of the tracers, due to inter-particle crosslinking. Formation of such clusters impacted the multimodal imaging performance and pharmacokinetics of these tracers. We found that MPI signal intensity of the tracers in blood depends on their plasmatic clearance pharmacokinetics. Whole body mice MPI/MRI/NIRF, used to study the biodistribution of the injected NPs, showed primary distribution in liver and spleen. Biodistribution of tracers and their clearance pathway was further confirmed by MPI and NIRF signals from the excised organs where the Cy5.5 labeling enabled detailed anatomical mapping of the tracers.in tissue sections. These multimodal MPI tracers, combining the strengths of each imaging modality (e.g. resolution, tracer sensitivity and clinical use feasibility) pave the way for various in vitro and in vivo MPI applications.
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Affiliation(s)
- Hamed Arami
- Department of Materials Science, University of Washington, Seattle, WA, 98195, USA
| | | | - Asahi Tomitaka
- Department of Materials Science, University of Washington, Seattle, WA, 98195, USA
| | - Elaine Yu
- Department of Bioengineering, University of California, Berkeley, CA, 94720, USA
| | - Patrick W Goodwill
- Department of Bioengineering, University of California, Berkeley, CA, 94720, USA
| | - Steven M Conolly
- Department of Bioengineering, University of California, Berkeley, CA, 94720, USA
| | - Kannan M Krishnan
- Department of Materials Science, University of Washington, Seattle, WA, 98195, USA.
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21
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Arami H, Krishnan KM. Intracellular performance of tailored nanoparticle tracers in magnetic particle imaging. JOURNAL OF APPLIED PHYSICS 2014; 115:17B306. [PMID: 24753632 PMCID: PMC3977802 DOI: 10.1063/1.4867756] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Accepted: 12/05/2013] [Indexed: 05/17/2023]
Abstract
Magnetic Particle Imaging (MPI) is a quantitative mass-sensitive, tracer-based imaging technique, with potential applications in various cellular imaging applications. The spatial resolution of MPI, in the first approximation, improves by decreasing the full width at half maximum (FWHM) of the field-derivative of the magnetization, dm/dH of the nanoparticle (NP) tracers. The FWHM of dm/dH depends critically on NPs' size, size distribution, and their environment. However, there is limited information on the MPI performance of the NPs after their internalization into cells. In this work, 30 to 150 μg of the iron oxide NPs were incubated in a lysosome-like acidic buffer (0.2 ml, 20 mM citric acid, pH 4.7) and investigated by vibrating sample magnetometry, magnetic particle spectroscopy, transmission electron microscopy, and dynamic light scattering (DLS). The FWHM of the dm/dH curves of the NPs increased with incubation time and buffer to NPs ratio, consistent with a decrease in the median core size of the NPs from ∼20.1 ± 0.98 to ∼18.5 ± 3.15 nm. Further, these smaller degraded NPs formed aggregates that responded to the applied field by hysteretic reversal at higher field values and increased the FWHM. The rate of core size decrease and aggregation were inversely proportional to the concentration of the incubated NPs, due to their slower biodegradation kinetics. The results of this model experiment show that the MPI performance of the NPs in the acidic environments of the intracellular organelles (i.e., lysosomes and endosomes) can be highly dependent on their rate of internalization, residence time, and degradation.
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Preparation of Tween 80-Zn/Al-levodopa-layered double hydroxides nanocomposite for drug delivery system. ScientificWorldJournal 2014; 2014:104246. [PMID: 24782658 PMCID: PMC3982257 DOI: 10.1155/2014/104246] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 02/01/2014] [Indexed: 11/17/2022] Open
Abstract
We incorporated anti-Parkinsonian drug, levodopa (dopa), in Zn/Al-LDH by coprecipitation method to form dopa-LDH nanocomposite. Further coating of Tween-80 on the external surfaces of dopa-LDH nanocomposite was achieved through the oxygen of C=O group of Tween-80 with the layer of dopa-LDH nanocomposite. The final product is called Tween-dopa-LDH nanocomposite. The X-ray diffraction indicates that the Tween-dopa-LDH nanocomposite was formed by aggregation structure. From the TGA data, the Tween-80 loading on the surface of LDH and dopa-LDH was 8.6 and 7.4%, respectively. The effect of coating process on the dopa release from Tween-dopa-LDH nanocomposite was also studied. The release from Tween-dopa-LDH nanocomposite shows slower release compared to the release of the drug from dopa-LDH nanocomposite as done previously in our study, presumably due to the retarding shielding effect. The cell viability study using PC12 showed improved viability with Tween-80 coating on dopa-LDH nanocomposite as studied by mitochondrial dehydrogenase activity (MTT assay).
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23
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Huang H, Li Y, Li C, Wang Y, Sun Y, Wang J. A Novel Anti-VEGF Targeting and MRI-Visible Smart Drug Delivery System for Specific Diagnosis and Therapy of Liver Cancer. Macromol Biosci 2013; 13:1358-68. [DOI: 10.1002/mabi.201300137] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 05/09/2013] [Indexed: 12/12/2022]
Affiliation(s)
- Hailong Huang
- Alan G. MacDiarmid Institute of Jilin University; Jilin University; Changchun 130012 China
| | - Yapeng Li
- Alan G. MacDiarmid Institute of Jilin University; Jilin University; Changchun 130012 China
| | - Caijin Li
- State Key Lab of Inorganic Synthesis and Preparative Chemistry of Jilin University; Changchun China
| | - Yuzhen Wang
- Alan G. MacDiarmid Institute of Jilin University; Jilin University; Changchun 130012 China
| | - Yuan Sun
- Alan G. MacDiarmid Institute of Jilin University; Jilin University; Changchun 130012 China
| | - Jingyuan Wang
- Alan G. MacDiarmid Institute of Jilin University; Jilin University; Changchun 130012 China
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24
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Arami H, Krishnan KM. Highly Stable Amine Functionalized Iron Oxide Nanoparticles Designed for Magnetic Particle Imaging (MPI). IEEE TRANSACTIONS ON MAGNETICS 2013; 49:3500-3503. [PMID: 25554710 PMCID: PMC4279922 DOI: 10.1109/tmag.2013.2245110] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Magnetic particle imaging (MPI) is a promising medical imaging technology that uses iron oxide nanoparticles (NPs) as clinically safe tracers. The core and hydrodynamic size of these NPs determine the signal intensity and spatial resolution in MPI, whilst their monodispersity when preserved during the biomedical applications, generates a consistently high quality MPI image. Using an effective process to coat the synthesized NPs with amine terminated PEG molecules, we show by dynamic light scattering (DLS) that they are water-soluble with long-term stability in biological media such as phosphate buffered saline (PBS) and sodium bicarbonate buffers and Dulbecco's modified Eagle medium (DMEM) enriched with 10% fetal bovine serum (FBS). Further, using magnetic particle spectroscopy (MPS), to measure the particle response function (PRF), defined as the derivative of the magnetization of the nanoparticles, we predict the MPI performance of these nanoparticles at a driving field frequency of 25 kHz. The MPS efficacy of the functionalized nanoparticles was also monitored over time, and both signal intensity and resolution remained unchanged even after seven days of incubation. This is attributed to the dominant contribution of the Néel relaxation mechanism of the monodisperse and highly stable nanoparticles, which was preserved through the incubation period.
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Affiliation(s)
- Hamed Arami
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195-2120 USA
| | - Kannan M Krishnan
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195-2120 USA
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25
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Yang CH, Wang CY, Huang KS, Yeh CS, Wang AHJ, Wang WT, Lin MY. Facile synthesis of radial-like macroporous superparamagnetic chitosan spheres with in-situ co-precipitation and gelation of ferro-gels. PLoS One 2012; 7:e49329. [PMID: 23226207 PMCID: PMC3511509 DOI: 10.1371/journal.pone.0049329] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Accepted: 10/09/2012] [Indexed: 12/04/2022] Open
Abstract
Macroporous chitosan spheres encapsulating superparamagnetic iron oxide nanoparticles were synthesized by a facile and effective one-step fabrication process. Ferro-gels containing ferrous cations, ferric cations and chitosan were dropped into a sodium hydroxide solution through a syringe pump. In addition, a sodium hydroxide solution was employed for both gelation (chitosan) and co-precipitation (ferrous cations and ferric cations) of the ferro-gels. The results showed that the in-situ co-precipitation of ferro-ions gave rise to a radial morphology with non-spheroid macro pores (large cavities) inside the chitosan spheres. The particle size of iron oxide can be adjusted from 2.5 nm to 5.4 nm by tuning the concentration of the sodium hydroxide solution. Using Fourier Transform Infrared Spectroscopy and X-ray diffraction spectra, the synthesized nanoparticles were illustrated as Fe3O4 nanoparticles. In addition, the prepared macroporous chitosan spheres presented a super-paramagnetic behaviour at room temperature with a saturation magnetization value as high as ca. 18 emu/g. The cytotoxicity was estimated using cell viability by incubating doses (0∼1000 µg/mL) of the macroporous chitosan spheres. The result showed good viability (above 80%) with alginate chitosan particles below 1000 µg/mL, indicating that macroporous chitosan spheres were potentially useful for biomedical applications in the future.
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Affiliation(s)
- Chih-Hui Yang
- Department of Biological Science & Technology, I-Shou University, Kaohsiung, Taiwan.
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