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Biomedical applications of silica-based aerogels: a comprehensive review. Macromol Res 2023. [DOI: 10.1007/s13233-023-00142-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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2
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Song L, Wang C, Wang X, Yu X, Li G, Zhang P, Zhang T. Optical spectrum detection of synthetic microsphere resonator using a nanofiber. OPTICS EXPRESS 2022; 30:35882-35893. [PMID: 36258529 DOI: 10.1364/oe.467534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 08/29/2022] [Indexed: 06/16/2023]
Abstract
We demonstrate optical spectrum detection of a synthetic silica microsphere (SSM) resonator with whispering gallery modes fabricated by chemical methods using an optical nanofiber to touch the SSM. Critical coupling, under coupling and over coupling are obtained by controlling the nanofiber radius. The SSM radius deviation, 0.51 nm, can be obtained through multiple measurements when the nanofiber touches the SSM equatorial planes randomly. The scheme opens a new avenue for accurate sample characterization and sample tracking for microparticle detection.
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Fernández-Hernán JP, Torres B, López AJ, Rams J. The Role of the Sol-Gel Synthesis Process in the Biomedical Field and Its Use to Enhance the Performance of Bioabsorbable Magnesium Implants. Gels 2022; 8:gels8070426. [PMID: 35877511 PMCID: PMC9315552 DOI: 10.3390/gels8070426] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/27/2022] [Accepted: 07/04/2022] [Indexed: 12/12/2022] Open
Abstract
In the present day, the increment in life expectancy has led to the necessity of developing new biomaterials for the restoration or substitution of damaged organs that have lost their functionalities. Among all the research about biomaterials, this review paper aimed to expose the main possibilities that the sol-gel synthesis method can provide for the fabrication of materials with interest in the biomedical field, more specifically, when this synthesis method is used to improve the biological properties of different magnesium alloys used as biomaterials. The sol-gel method has been widely studied and used to generate ceramic materials for a wide range of purposes during the last fifty years. Focused on biomedical research, the sol-gel synthesis method allows the generation of different kinds of biomaterials with diverse morphologies and a high potential for the biocompatibility improvement of a wide range of materials commonly used in the biomedical field such as metallic implants, as well as for the generation of drug delivery systems or interesting biomaterials for new tissue engineering therapies.
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Awad M, Thomas N, Barnes TJ, Prestidge CA. Nanomaterials enabling clinical translation of antimicrobial photodynamic therapy. J Control Release 2022; 346:300-316. [PMID: 35483636 DOI: 10.1016/j.jconrel.2022.04.035] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 04/21/2022] [Accepted: 04/21/2022] [Indexed: 10/18/2022]
Abstract
Antimicrobial photodynamic therapy (aPDT) has emerged as a promising approach to aid the fight against looming antibiotic resistance. aPDT harnesses the energy of light through photosenstizers to generate highly reactive oxygen species that can inactivate bacteria and fungi with no resistance. To date aPDT has shown great efficacy against microbes causing localized infections in the skin and the oral cavity. However, its wide application in clinical settings has been limited due to both physicochemical and biological challenges. Over the past decade nanomaterials have contributed to promoting photosensitizer performance and aPDT efficiency, yet further developments are required to establish accredited treatment options. In this review we discuss the challenges facing the clinical application of aPDT and the opportunities that nanotechnology may offer to promote the safety and efficiency of aPDT.
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Affiliation(s)
- Muhammed Awad
- University of South Australia, Clinical and Health Sciences, Adelaide 5000, Australia; Basil Hetzel Institute for Translational Health Research, Woodville 5011, Australia.
| | - Nicky Thomas
- University of South Australia, Clinical and Health Sciences, Adelaide 5000, Australia.
| | - Timothy J Barnes
- University of South Australia, Clinical and Health Sciences, Adelaide 5000, Australia.
| | - Clive A Prestidge
- University of South Australia, Clinical and Health Sciences, Adelaide 5000, Australia.
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Ndayishimiye J, Kumeria T, Popat A, Falconer JR, Blaskovich MAT. Nanomaterials: The New Antimicrobial Magic Bullet. ACS Infect Dis 2022; 8:693-712. [PMID: 35343231 DOI: 10.1021/acsinfecdis.1c00660] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Bacterial infections are a significant cause of mortality and morbidity worldwide, despite decades of use of numerous existing antibiotics and constant efforts by researchers to discover new antibiotics. The emergence of infections associated with antibiotic-resistant bacterial strains, has amplified the pressure to develop additional bactericidal therapies or new unorthodox approaches that can deal with antimicrobial resistance. Nanomaterial-based strategies, particularly those that do not rely on conventional small-molecule antibiotics, offer promise in part due to their ability to dodge existing mechanisms used by drug-resistant bacteria. Therefore, the use of nanomaterial-based formulations has attracted attention in the field of antibiotic therapy. In this Review, we highlight novel and emerging nanomaterial-based formulations along with details about the mechanisms by which nanoparticles can target bacterial infections and antimicrobial resistance. A detailed discussion about types and the activities of nanoparticles is presented, along with how they can be used as either delivery systems or as inherent antimicrobials, or a combination of both. Lastly, we highlight some toxicological concerns for the use of nanoparticles in antibiotic therapies.
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Affiliation(s)
- John Ndayishimiye
- School of Pharmacy, Pharmacy Australia Centre of Excellence, The University of Queensland, Brisbane, Queensland 4102, Australia
- Centre for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Tushar Kumeria
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
- Australian Center for NanoMedicine, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Amirali Popat
- School of Pharmacy, Pharmacy Australia Centre of Excellence, The University of Queensland, Brisbane, Queensland 4102, Australia
- Mater Research Institute, The University of Queensland, Translational Research Institute, 37 Kent Street, Woolloongabba, Queensland 4102, Australia
| | - James Robert Falconer
- School of Pharmacy, Pharmacy Australia Centre of Excellence, The University of Queensland, Brisbane, Queensland 4102, Australia
| | - Mark A. T. Blaskovich
- Centre for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland 4072, Australia
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Fernández-Hernán JP, López AJ, Torres B, Martínez-Campos E, Matykina E, Rams J. Anticorrosion and Cytocompatibility Assessment of Graphene-Doped Hybrid Silica and Plasma Electrolytic Oxidation Coatings for Biomedical Applications. ACS Biomater Sci Eng 2021; 7:5861-5877. [PMID: 34748311 PMCID: PMC8939847 DOI: 10.1021/acsbiomaterials.1c00326] [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] [Indexed: 11/28/2022]
Abstract
![]()
Magnesium AZ31 alloy substrates were
coated with different coatings,
including sol–gel silica-reinforced with graphene nanoplatelets,
sol–gel silica, plasma electrolytic oxidation (PEO), and combinations
of them, to improve cytocompatibility and control the corrosion rate.
Electrochemical corrosion tests, as well as hydrogen evolution tests,
were carried out using Hanks’ solution as the electrolyte to
assess the anticorrosion behavior of the different coating systems
in a simulated body fluid. Preliminary cytocompatibility assessment
of the different coating systems was carried out by measuring the
metabolic activity, deoxyribonucleic acid quantification, and the
cell growth of premyoblastic C2C12-GFP cell cultures on the surface
of the different coating systems. Anticorrosion behavior and cytocompatibility
were improved with the application of the different coating systems.
The use of combined PEO + SG and PEO + SG/GNP coatings significantly
decreased the degradation of the specimens. The monolayer sol–gel
coatings, with and without GNPs, presented the best cytocompatibility
improvement.
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Affiliation(s)
- Juan P Fernández-Hernán
- Departamento de Matemática Aplicada, Ciencia e Ingeniería de Materiales y Tecnología Electrónica, ESCET, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Móstoles, Spain
| | - Antonio J López
- Departamento de Matemática Aplicada, Ciencia e Ingeniería de Materiales y Tecnología Electrónica, ESCET, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Móstoles, Spain
| | - Belén Torres
- Departamento de Matemática Aplicada, Ciencia e Ingeniería de Materiales y Tecnología Electrónica, ESCET, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Móstoles, Spain
| | - Enrique Martínez-Campos
- Instituto de estudios biofuncionales, ICTP-CSIC, Universidad Complutense, Paseo Juan XXIII No 1, 28045 Madrid, Spain
| | - Endzhe Matykina
- Departamento de Ingeniería Química y de Materiales, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain
| | - Joaquín Rams
- Departamento de Matemática Aplicada, Ciencia e Ingeniería de Materiales y Tecnología Electrónica, ESCET, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Móstoles, Spain
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Klep O, Jones HW, Reukov V, Foulger SH. Control of Vancomycin Activity through the Encapsulation and Controlled Release from a Propargyl Acrylate-Poloxamer Nanocomposite System. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:14607-14613. [PMID: 33231460 DOI: 10.1021/acs.langmuir.0c02385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Vancomycin is a potent antibacterial drug that suffers from poor bioavailability due to its poor water solubility and relatively high molecular weight. Consequently, the application of vancomycin to treat bacteria-induced disease is limited. In this study, the ability of a temperature-stimulated propargyl acrylate-poloxamer nanocomposite (PAPN) system to encapsulate and release vancomycin is investigated. A controllable encapsulation and release system can be used to not only increase and prolong the bioavailability of vancomycin but also activate vancomycin with a temperature change. The PAPN system was prepared using an emulsion polymerization of propargyl acrylate followed by a surface decoration with a poloxamer at a precisely controlled grafting density. The activity of the PAPN system loaded with vancomycin is compared to that of the free drug and unmodified propargyl acrylate nanoparticles. It is shown that the activity of the PAPN system loaded with vancomycin is comparable to that of a freshly prepared, free-floating vancomycin solution. Upon storage, the activity of the free vancomycin in solution decreases, while the PAPN system loaded with vancomycin retains its high activity. Additionally, the PAPN system is able to effectively encapsulate and deactivate vancomycin until heated above a lower critical solution temperature (LCST). At temperatures above the LCST, the PAPN system releases vancomycin restoring the activity of the drug.
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Affiliation(s)
- Oleksandr Klep
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
- Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, Anderson, South Carolina 29625, United States
| | - Haley W Jones
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
- Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, Anderson, South Carolina 29625, United States
| | - Vladimir Reukov
- Department of Textiles, Merchandising, and Interiors, University of Georgia, Athens, Georgia 30602, United States
| | - Stephen H Foulger
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
- Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, Anderson, South Carolina 29625, United States
- Department of Bioengineering, Clemson University, Clemson, South Carolina 29634, United States
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Nanomaterials and nanocomposite applications in veterinary medicine. MULTIFUNCTIONAL HYBRID NANOMATERIALS FOR SUSTAINABLE AGRI-FOOD AND ECOSYSTEMS 2020. [PMCID: PMC7252256 DOI: 10.1016/b978-0-12-821354-4.00024-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Nowadays, nanotechnology has made huge, significant advancements in biotechnology and biomedicine related to human and animal science, including increasing health safety, production, and the elevation of national income. There are various fields of nanomaterial applications in veterinary medicine such as efficient diagnostic and therapeutic tools, drug delivery, animal nutrition, breeding and reproduction, and valuable additives. Additional benefits include the detection of pathogens, protein, biological molecules, antimicrobial agents, feeding additives, nutrient delivery, and reproductive aids. There are many nanomaterials and nanocomposites that can be used in nanomedicine such as metal nanoparticles, liposomes, carbon nanotubes, and quantum dots. In the near future, nanotechnology research will have the ability to produce novel tools for improving animal health and production. Therefore, this chapter was undertaken to spotlight novel methods created by nanotechnology for application in the improvement of animal health and production. In addition, the toxicity of nanomaterials is fully discussed to avoid the suspected health hazards of toxicity for animal health safety.
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Mosselhy DA, He W, Hynönen U, Meng Y, Mohammadi P, Palva A, Feng Q, Hannula SP, Nordström K, Linder MB. Silica-gentamicin nanohybrids: combating antibiotic resistance, bacterial biofilms, and in vivo toxicity. Int J Nanomedicine 2018; 13:7939-7957. [PMID: 30568441 PMCID: PMC6276608 DOI: 10.2147/ijn.s182611] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION Antibiotic resistance is a growing concern in health care. Methicillin-resistant Staphylococcus aureus (MRSA), forming biofilms, is a common cause of resistant orthopedic implant infections. Gentamicin is a crucial antibiotic preventing orthopedic infections. Silica-gentamicin (SiO2-G) delivery systems have attracted significant interest in preventing the formation of biofilms. However, compelling scientific evidence addressing their efficacy against planktonic MRSA and MRSA biofilms is still lacking, and their safety has not extensively been studied. MATERIALS AND METHODS In this work, we have investigated the effects of SiO2-G nanohybrids against planktonic MRSA as well as MRSA and Escherichia coli biofilms and then evaluated their toxicity in zebrafish embryos, which are an excellent model for assessing the toxicity of nanotherapeutics. RESULTS SiO2-G nanohybrids inhibited the growth and killed planktonic MRSA at a minimum concentration of 500 µg/mL. SiO2-G nanohybrids entirely eradicated E. coli cells in biofilms at a minimum concentration of 250 µg/mL and utterly deformed their ultrastructure through the deterioration of bacterial shapes and wrinkling of their cell walls. Zebrafish embryos exposed to SiO2-G nanohybrids (500 and 1,000 µg/mL) showed a nonsignificant increase in mortality rates, 13.4±9.4 and 15%±7.1%, respectively, mainly detected 24 hours post fertilization (hpf). Frequencies of malformations were significantly different from the control group only 24 hpf at the higher exposure concentration. CONCLUSION Collectively, this work provides the first comprehensive in vivo assessment of SiO2-G nanohybrids as a biocompatible drug delivery system and describes the efficacy of SiO2-G nanohybrids in combating planktonic MRSA cells and eradicating E. coli biofilms.
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Affiliation(s)
- Dina A Mosselhy
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, Espoo, Finland,
- Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, Espoo, Finland,
- Fish Diseases Department, Microbiological Unit, Animal Health Research Institute, Dokki, Giza 12618, Egypt,
| | - Wei He
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People's Republic of China
| | - Ulla Hynönen
- Department of Veterinary Biosciences, Division of Veterinary Microbiology and Epidemiology, University of Helsinki, Helsinki, Finland
| | - Yaping Meng
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Department of Biological Sciences and Biotechnology, Tsinghua University, Beijing, People's Republic of China
| | - Pezhman Mohammadi
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, Espoo, Finland,
| | - Airi Palva
- Department of Veterinary Biosciences, Division of Veterinary Microbiology and Epidemiology, University of Helsinki, Helsinki, Finland
| | - Qingling Feng
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China,
| | - Simo-Pekka Hannula
- Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, Espoo, Finland,
| | - Katrina Nordström
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, Espoo, Finland,
| | - Markus B Linder
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, Espoo, Finland,
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Perumal RK, Gopinath A, Thangam R, Perumal S, Masilamani D, Ramadass SK, Madhan B. Collagen-silica bio-composite enriched with Cynodon dactylon extract for tissue repair and regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 92:297-306. [PMID: 30184754 DOI: 10.1016/j.msec.2018.06.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Revised: 05/17/2018] [Accepted: 06/25/2018] [Indexed: 11/29/2022]
Abstract
Development of biomaterials for tissue engineering applications is of great interest to meet the demand of different clinical requirements. The wound heal dressing biomaterials should necessarily contain well-defined therapeutic components and desirable physical, chemical and biological properties to support optimal delivery of therapeutics at the site of the wound. In this study, we developed collagen-silica wound heal scaffold incorporated with the extract of Cynodon dactylon, characterized and evaluated for its wound heal potential in vitro and in vivo against collagen (Col) and Collagen-silica (CS) scaffolds that served as controls. The prepared Collagen-Silica-Cynodon extract (CSCE) scaffold exhibits porous morphology with preferable biophysical, chemical, mechanical and mass transfer properties besides its controlled biodegradation at the wound site. Stability of CSCE was found to be better than that of native collagen due to intermolecular interactions between collagen and constituents of C. dactylon as confirmed by FTIR analysis. Notably, in vitro biocompatibility assay using DAPI and Rhodamine 123 staining demonstrated that the proliferation of NIH3T3 fibroblast cells was better for CSCE when compared to the Col and CS scaffolds. In vivo wound healing experiments with full-thickness excision wounds in wistar rat model demonstrated that the wounds treated with CSCE showed accelerated healing with enhanced collagen deposition when compared to wounds treated with Col and CS scaffolds, and these studies substantiated the efficacy of CSCE scaffold for treating wounds.
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Affiliation(s)
| | - Arun Gopinath
- CSIR - Central Leather Research Institute, Adyar, Chennai 600020, Tamil Nadu, India
| | - Ramar Thangam
- CSIR - Central Leather Research Institute, Adyar, Chennai 600020, Tamil Nadu, India
| | - Sathiamurthi Perumal
- CSIR - Central Leather Research Institute, Adyar, Chennai 600020, Tamil Nadu, India
| | - Dinesh Masilamani
- CSIR - Central Leather Research Institute, Adyar, Chennai 600020, Tamil Nadu, India
| | | | - Balaraman Madhan
- CSIR - Central Leather Research Institute, Adyar, Chennai 600020, Tamil Nadu, India.
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Cadavid-Vargas JF, Arnal PM, Mojica Sepúlveda RD, Rizzo A, Soria DB, Di Virgilio AL. Copper complex with sulfamethazine and 2,2'-bipyridine supported on mesoporous silica microspheres improves its antitumor action toward human osteosarcoma cells: cyto- and genotoxic effects. Biometals 2018; 32:21-32. [PMID: 30334122 DOI: 10.1007/s10534-018-0154-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 10/09/2018] [Indexed: 12/20/2022]
Abstract
Ideal drugs to cure cancer leave normal cells unharmed while selectively turning tumor cells unviable. Several copper complexes have been able to selectively slow down tumor proliferation. We hypothesized that Cu(smz)2(bipy)·H2O (1)-a copper-complex that has two ligands capable of interacting with DNA-would outperform Cu(smz)2(OH2)·2H2O (2), and also that supporting 1 on mesoporous silica spheres would decrease even further tumor cell viability in vitro. After exposing osteosarcoma cells (MG-63) and normal phenotype cells of bone origin (MC3T3-E1) to either complex, we studied their toxic effect and mechanisms of action. We determined cell viability (MTT assay) and quantified formation of reactive oxygen species (oxidation of DHR-123 to rhodamine). Moreover, we assessed genotoxicity from (i) formation of micronucleus (MN assay) and (ii) damage of DNA (Comet assay). After the exposure of 1 supported on silica spheres, we tested cell viability. Our results confirm our hypotheses: inhibition of tumor cells follows: supported 1 > dissolved 1 > 2. Future work that enhances the load of the complex exclusively in mesopores may improve the ability of 1 to further inhibit tumor cell viability.
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Affiliation(s)
- Juan Fernando Cadavid-Vargas
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900, La Plata, Argentina
| | - Pablo Maximiliano Arnal
- CETMIC (Centro de Tecnología de Recursos Minerales y Cerámica), Cno Centenario y 506, CC 49, B1897ZCA, M.B. Gonnet, Buenos Aires, Argentina
- Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900, La Plata, Argentina
| | - Ruth Dary Mojica Sepúlveda
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900, La Plata, Argentina
| | - Andrea Rizzo
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900, La Plata, Argentina
| | - Delia Beatriz Soria
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900, La Plata, Argentina
| | - Ana Laura Di Virgilio
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900, La Plata, Argentina.
- Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900, La Plata, Argentina.
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Huang W, Tsui CP, Tang CY, Gu L. Effects of Compositional Tailoring on Drug Delivery Behaviours of Silica Xerogel/Polymer Core-shell Composite Nanoparticles. Sci Rep 2018; 8:13002. [PMID: 30158709 PMCID: PMC6115385 DOI: 10.1038/s41598-018-31070-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 08/10/2018] [Indexed: 12/27/2022] Open
Abstract
Conventional core-shell polymer nanoparticles usually exhibit a rapid release rate with their release kinetics mainly adjusted through changing composition of the polymer shells, limiting their applications for prolonged drug delivery. As a solution to these problems, silica xerogel/polymer core-shell-structured composite nanoparticles have been proposed. Different with our previous work centring on studying process variables, we here focused on investigating the effects of key compositional variables on essential properties of the composite nanoparticles. The drug release profiles (in vitro) were well interpreted by the Baker and Lonsdale model on a predicted two-stage basis. The first stage (<1 day) was well controlled from 18.6% to 45.9%; the second stage (1-14 days) was tailored in a range from 28.7 to 58.2% by changing the composition of the silica xerogel cores and polymeric shells. A substantial achievement was reducing the release rate by more than 40 times compared with that of conventional polymer nanoparticles by virtue of the silica xerogel cores. A semi-empirical model was also established in the first attempt to describe the effects of polymer concentration and drug loading capacity on the size of the composite nanoparticles. All these results indicated that the composite nanoparticles are promising candidates for prolonged drug delivery applications.
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Affiliation(s)
- Wenfei Huang
- Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Chi Pong Tsui
- Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Chak Yin Tang
- Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Linxia Gu
- Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68588-0656, USA
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Tanjim M, Rahman MA, Rahman MM, Minami H, Hoque SM, Sharafat MK, Gafur MA, Ahmad H. Mesoporous magnetic silica particles modified with stimuli-responsive P(NIPAM-DMA) valve for controlled loading and release of biologically active molecules. SOFT MATTER 2018; 14:5469-5479. [PMID: 29923579 DOI: 10.1039/c8sm00560e] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Mesoporous magnetic silica particles bearing a stimuli-responsive polymer valve were prepared and their performance as a microcapsule was evaluated. In this study, first, mesoporous magnetic iron oxide (Fe3O4) particles were prepared by a solvothermal method. Then, the magnetic particles were coated with silica and functionalized with vinyl groups using 3-(trimethoxysilyl)-propyl methacrylate (MPS). Subsequently, the Fe3O4/SiO2 composite particles grafted with MPS were used to carry out the seeded precipitation copolymerization of N-isopropylacrylamide (NIPAM) and 2,2-dimethylaminoethyl methacrylate (DMA). Here N,N'-methylenebisacrylamide (MBA) was used as a cross-linker. Brunauer-Emmett-Teller (BET) surface analysis suggested that the mesoporous structure was retained in the final Fe3O4/SiO2/P(NIPAM-DMA-MBA) composite hydrogel particles. The prepared Fe3O4/SiO2/P(NIPAM-DMA-MBA) composite hydrogel microspheres exhibited a pH-dependent volume phase transition. At lower pH values (<7), the inclusion of DMA shifted the volume phase transition to higher temperature because of the protonation of the tertiary amine groups. The composite hydrogel particles possessed a high saturation magnetization (51 emu g-1) and moved under the influence of an external magnetic field. The loading-release behaviour of these biologically active molecules suggested that a portion of the encapsulated guest molecules was released at a temperature below the lower critical solution temperature, LCST (<35 °C).
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Affiliation(s)
- Mustahida Tanjim
- Department of Chemistry, Rajshahi University, Rajshahi 6205, Bangladesh.
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Ding Y, Li W, Correia A, Yang Y, Zheng K, Liu D, Schubert DW, Boccaccini AR, Santos HA, Roether JA. Electrospun Polyhydroxybutyrate/Poly(ε-caprolactone)/Sol-Gel-Derived Silica Hybrid Scaffolds with Drug Releasing Function for Bone Tissue Engineering Applications. ACS APPLIED MATERIALS & INTERFACES 2018; 10:14540-14548. [PMID: 29624366 PMCID: PMC6108537 DOI: 10.1021/acsami.8b02656] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 04/06/2018] [Indexed: 05/23/2023]
Abstract
Electrospun hybrid scaffolds are an effective platform to deliver drugs site specifically for the prevention and treatment of diseases in addition to promote tissue regeneration because of the flexibility to load drugs therein. In the present study, electrospun hybrid scaffolds containing antibiotics were developed to support cellular activities and eliminate potential postoperative inflammation and infection. As a model drug, levofloxacin (LFX) was successfully incorporated into pure polyhydroxybutyrate/poly(ε-caprolactone) (PHB/PCL) scaffolds and PHB/PCL/sol-gel-derived silica (SGS) scaffolds. The influence of LFX on the morphology, mechanical performance, chemical structure, drug release profile, and antibacterial effect of the scaffolds was thoroughly and comparatively investigated. MG-63 osteoblast-like cell cultivation on both scaffolds certified that LFX inclusion did not impair the biocompatibility. In addition to the favorable cellular proliferation and differentiation, scaffolds containing both LFX and SGS displayed highly increased mineralization content. Therefore, the present multifunctional hybrid scaffolds are promising in tissue engineering applications.
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Affiliation(s)
- Yaping Ding
- Drug
Research Program, Division of Pharmaceutical Chemistry and Technology,
Faculty of Pharmacy, and Helsinki Institute of Life Science (HiLIFE), University of Helsinki, FI-00014 Helsinki, Finland
- Institute of Polymer Materials, University of Erlangen−Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany
| | - Wei Li
- Drug
Research Program, Division of Pharmaceutical Chemistry and Technology,
Faculty of Pharmacy, and Helsinki Institute of Life Science (HiLIFE), University of Helsinki, FI-00014 Helsinki, Finland
| | - Alexandra Correia
- Drug
Research Program, Division of Pharmaceutical Chemistry and Technology,
Faculty of Pharmacy, and Helsinki Institute of Life Science (HiLIFE), University of Helsinki, FI-00014 Helsinki, Finland
| | - Yuyun Yang
- Institute of Biomaterials, University of
Erlangen−Nuremberg, Cauerstrasse 6, 91058 Erlangen, Germany
- Institute of Corrosion
Science and Surface Technology, Harbin Engineering
University, Nantong Street 145, 150001 Harbin, China
| | - Kai Zheng
- Institute of Biomaterials, University of
Erlangen−Nuremberg, Cauerstrasse 6, 91058 Erlangen, Germany
| | - Dongfei Liu
- Drug
Research Program, Division of Pharmaceutical Chemistry and Technology,
Faculty of Pharmacy, and Helsinki Institute of Life Science (HiLIFE), University of Helsinki, FI-00014 Helsinki, Finland
| | - Dirk W. Schubert
- Institute of Polymer Materials, University of Erlangen−Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany
| | - Aldo R. Boccaccini
- Institute of Biomaterials, University of
Erlangen−Nuremberg, Cauerstrasse 6, 91058 Erlangen, Germany
| | - Hélder A. Santos
- Drug
Research Program, Division of Pharmaceutical Chemistry and Technology,
Faculty of Pharmacy, and Helsinki Institute of Life Science (HiLIFE), University of Helsinki, FI-00014 Helsinki, Finland
| | - Judith A. Roether
- Institute of Polymer Materials, University of Erlangen−Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany
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15
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Uthappa UT, Sriram G, Brahmkhatri V, Kigga M, Jung HY, Altalhi T, Neelgund GM, Kurkuri MD. Xerogel modified diatomaceous earth microparticles for controlled drug release studies. NEW J CHEM 2018. [DOI: 10.1039/c8nj01238e] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An alternative facile approach for the surface modification of naturally available diatoms with xerogel for controlled drug release applications.
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Affiliation(s)
- U. T. Uthappa
- Centre for Nano and Material Sciences
- Jain University
- Bengaluru-562112
- India
| | - G. Sriram
- Centre for Nano and Material Sciences
- Jain University
- Bengaluru-562112
- India
| | - Varsha Brahmkhatri
- Centre for Nano and Material Sciences
- Jain University
- Bengaluru-562112
- India
| | - Madhuprasad Kigga
- Centre for Nano and Material Sciences
- Jain University
- Bengaluru-562112
- India
| | - Ho-Young Jung
- Department of Environment and Energy Engineering
- Chonnam National University
- Gwangju 61186
- Republic of Korea
| | - Tariq Altalhi
- Department of Chemistry
- Faculty of Science
- Taif University
- Taif
- Saudi Arabia
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16
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Wang B, Friess W. Spray drying of silica microparticles for sustained release application with a new sol-gel precursor. Int J Pharm 2017; 532:281-288. [PMID: 28890172 DOI: 10.1016/j.ijpharm.2017.09.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 09/06/2017] [Accepted: 09/07/2017] [Indexed: 11/30/2022]
Abstract
A new precursor, tetrakis(2-methoxyethyl) orthosilicate (TMEOS) was used to fabricate microparticles for sustained release application, specifically for biopharmaceuticals, by spray drying. The advantages of TMEOS over the currently applied precursors are its water solubility and hydrolysis at moderate pH without the need of organic solvents or catalyzers. Thus a detrimental effect on biomolecular drug is avoided. By generating spray-dried silica particles encapsulating the high molecular weight model compound FITC-dextran 150 via the nano spray dryer Büchi-90, we demonstrated how formulation parameters affect and enable control of drug release properties. The implemented strategies to regulate release included incorporating different quantities of dextrans with varying molecular weight as well as adjusting the pH of the precursor solution to modify the internal microstructures. The addition of dextran significantly altered the released amount, while the release became faster with increasing dextran molecular weight. A sustained release over 35days could be achieved with addition of 60 kD dextran. The rate of FITC-Dextran 150 release from the dextran 60 containing particles decreased with higher precursor solution pH. In conclusion, the new precursor TMEOS presents a promising alternative sol-gel technology based carrier material for sustained release application of high molecular weight biopharmaceutical drugs.
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Affiliation(s)
- Bifeng Wang
- Department of Pharmacy, Pharmaceutical Technology and Biopharmaceutics, Ludwig-Maximilians-Universitaet Muenchen, Butenandtstrasse 5, D-81377, Munich, Germany
| | - Wolfgang Friess
- Department of Pharmacy, Pharmaceutical Technology and Biopharmaceutics, Ludwig-Maximilians-Universitaet Muenchen, Butenandtstrasse 5, D-81377, Munich, Germany.
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17
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Kruppke B, Hose D, Schnettler R, Seckinger A, Rößler S, Hanke T, Heinemann S. Drug Release as a function of bioactivity, incubation regime, liquid, and initial load: Release of bortezomib from calcium phosphate-containing silica/collagen xerogels. J Biomed Mater Res B Appl Biomater 2017; 106:1165-1173. [PMID: 28556562 DOI: 10.1002/jbm.b.33931] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 04/10/2017] [Accepted: 05/12/2017] [Indexed: 01/14/2023]
Abstract
The ability of silica-/collagen-based composite xerogels to act as drug delivery systems was evaluated by taking into account the initial drug concentration, bioactivity of the xerogels, liquid, and incubation regime. The proteasome inhibitor bortezomib was chosen as a model drug, used for the systemic treatment of multiple myeloma. Incubation during 14 days in phosphate-buffered saline (PBS) or simulated body fluid (SBF) showed a weak initial burst and was identified to be of first order with subsequent release being independent from the initial load of 0.1 or 0.2 mg bortezomib per 60 mg monolithic sample. Faster drug release occurred during incubation in SBF compared to PBS, and during static incubation without changing the liquid, compared to dynamic incubation with daily liquid changes. Drug-loaded xerogels with hydroxyapatite as a third component exhibited enhanced bioactivity retarding drug release, explained by formation of a surface calcium phosphate layer. The fastest release of 50% of the total drug load was observed for biphasic xerogels after 7 days during dynamic incubation in SBF. As a result, the presented concept is suitable for the intended combination of the advantageous bone substitution properties of xerogels and local application of drugs exemplified by bortezomib. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1165-1173, 2018.
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Affiliation(s)
- Benjamin Kruppke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, 01069, Dresden, Germany
| | - Dirk Hose
- Labor für Myelomforschung, Medizinische Klinik V, Universitätsklinikum Heidelberg, 69120, Heidelberg, Germany
| | - Reinhard Schnettler
- Laboratory for Experimental Trauma Surgery, University of Giessen, 35385, Giessen, Germany
| | - Anja Seckinger
- Labor für Myelomforschung, Medizinische Klinik V, Universitätsklinikum Heidelberg, 69120, Heidelberg, Germany
| | - Sina Rößler
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, 01069, Dresden, Germany
| | - Thomas Hanke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, 01069, Dresden, Germany
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18
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Tobin EJ. Recent coating developments for combination devices in orthopedic and dental applications: A literature review. Adv Drug Deliv Rev 2017; 112:88-100. [PMID: 28159606 DOI: 10.1016/j.addr.2017.01.007] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 12/30/2016] [Accepted: 01/30/2017] [Indexed: 02/06/2023]
Abstract
Orthopedic and dental implants have been used successfully for decades to replace or repair missing or damaged bones, joints, and teeth, thereby restoring patient function subsequent to disease or injury. However, although device success rates are generally high, patient outcomes are sometimes compromised due to device-related problems such as insufficient integration, local tissue inflammation, and infection. Many different types of surface coatings have been developed to address these shortcomings, including those that incorporate therapeutic agents to provide localized delivery to the surgical site. While these coatings hold enormous potential for improving device function, the list of requirements that an ideal combination coating must fulfill is extensive, and no single coating system today simultaneously addresses all of the criteria. Some of the primary challenges related to current coatings are non-optimal release kinetics, which most often are too rapid, the potential for inducing antibiotic resistance in target organisms, high susceptibility to mechanical abrasion and delamination, toxicity, difficult and expensive regulatory approval pathways, and high manufacturing costs. This review provides a survey of the most recent developments in the field, i.e., those published in the last 2-3years, with a particular focus on technologies that have potential for overcoming the most significant challenges facing therapeutically-loaded coatings. It is concluded that the ideal coating remains an unrealized target, but that advances in the field and emerging technologies are bringing it closer to reality. The significant amount of research currently being conducted in the field provides a level of optimism that many functional combination coatings will ultimately transition into clinical practice, significantly improving patient outcomes.
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19
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Wen J, Yang K, Liu F, Li H, Xu Y, Sun S. Diverse gatekeepers for mesoporous silica nanoparticle based drug delivery systems. Chem Soc Rev 2017; 46:6024-6045. [DOI: 10.1039/c7cs00219j] [Citation(s) in RCA: 312] [Impact Index Per Article: 44.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Progress on the design of diverse gatekeepers for mesoporous silica nanoparticle based drug delivery systems is summarized.
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Affiliation(s)
- Jia Wen
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling
- P. R. China
| | - Kui Yang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling
- P. R. China
| | - Fengyu Liu
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian 116023
- China
| | - Hongjuan Li
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling
- P. R. China
| | - Yongqian Xu
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling
- P. R. China
| | - Shiguo Sun
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling
- P. R. China
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20
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Chen X, Liu Z. A pH-Responsive Hydrogel Based on a Tumor-Targeting Mesoporous Silica Nanocomposite for Sustained Cancer Labeling and Therapy. Macromol Rapid Commun 2016; 37:1533-9. [DOI: 10.1002/marc.201600261] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 06/16/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Xin Chen
- School of Chemical Engineering and Technology; Shanxi Key Laboratory of Energy Chemical Process Intensification; Institute of Polymer Science in Chemical Engineering; Xi'an Jiao Tong University; Xi'an 710049 China
| | - Zhongning Liu
- Department of Prosthodontics; Peking University School and Hospital of Stomatology; Beijing 100081 China
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21
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Halevas E, Nday CM, Salifoglou A. Hybrid catechin silica nanoparticle influence on Cu(II) toxicity and morphological lesions in primary neuronal cells. J Inorg Biochem 2016; 163:240-249. [PMID: 27301643 DOI: 10.1016/j.jinorgbio.2016.04.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Revised: 04/07/2016] [Accepted: 04/12/2016] [Indexed: 02/01/2023]
Abstract
Morphological alterations compromising inter-neuronal connectivity may be directly linked to learning-memory deficits in Central Nervous System neurodegenerative processes. Cu(II)-mediated oxidative stress plays a pivotal role in regulating redox reactions generating reactive oxygen species (ROS) and reactive nitrogen species (RNS), known contributors to Alzheimer's disease (AD) pathology. The antioxidant properties of flavonoid catechin have been well-documented in neurodegenerative processes. However, the impact that catechin encapsulation in nanoparticles may have on neuronal survival and morphological lesions has been poorly demonstrated. To investigate potential effects of nano-encapsulated catechin on neuronal survival and morphological aberrations in primary rat hippocampal neurons, poly(ethyleneglycol) (PEG) and cetyltrimethylammonium bromide (CTAB)-modified silica nanoparticles were synthesized. Catechin was loaded on silica nanoparticles in a concentration-dependent fashion, and release studies were carried out. Further physicochemical characterization of the new nano-materials included elemental analysis, particle size, z-potential, FT-IR, Brunauer-Emmett-Teller (BET), thermogravimetric (TGA), and scanning electron microscopy (SEM) analysis in order to optimize material composition linked to the delivery of loaded catechin in the hippocampal cellular milieu. The findings reveal that, under Cu(II)-induced oxidative stress, the loading ability of the PEGylated/CTAB silica nanoparticles was concentration-dependent, based on their catechin release profile. The overall bio-activity profile of the new hybrid nanoparticles a) denoted their enhanced protective activity against oxidative stress and hippocampal cell survival compared to previously reported quercetin, b) revealed that morphological lesions affecting neuronal integrity can be counterbalanced at high copper concentrations, and c) warrants in-depth perusal of molecular events underlying neuronal function and degeneration, collectively linked to preventive nanotechnology in neurodegeneration.
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Affiliation(s)
- E Halevas
- Laboratory of Inorganic Chemistry, Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - C M Nday
- Laboratory of Inorganic Chemistry, Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - A Salifoglou
- Laboratory of Inorganic Chemistry, Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece.
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22
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Mosselhy DA, Ge Y, Gasik M, Nordström K, Natri O, Hannula SP. Silica-Gentamicin Nanohybrids: Synthesis and Antimicrobial Action. MATERIALS 2016; 9:ma9030170. [PMID: 28773296 PMCID: PMC5456682 DOI: 10.3390/ma9030170] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Revised: 02/19/2016] [Accepted: 02/29/2016] [Indexed: 12/27/2022]
Abstract
Orthopedic applications commonly require the administration of systemic antibiotics. Gentamicin is one of the most commonly used aminoglycosides in the treatment and prophylaxis of infections associated with orthopedic applications, but gentamicin has a short half-life. However, silica nanoparticles (SiO2 NPs) can be used as elegant carriers for antibiotics to prolong their release. Our goal is the preparation and characterization of SiO2-gentamicin nanohybrids for their potential antimicrobial administration in orthopedic applications. In vitro gentamicin release profile from the nanohybrids (gentamicin-conjugated SiO2 NPs) prepared by the base-catalyzed precipitation exhibited fast release (21.4%) during the first 24 h and further extension with 43.9% release during the five-day experiment. Antimicrobial studies of the SiO2-gentamicin nanohybrids versus native SiO2 NPs and free gentamicin were performed against Bacillus subtilis (B. subtilis), Pseudomonas fluorescens (P. fluorescens) and Escherichia coli (E. coli). SiO2-gentamicin nanohybrids were most effective against B. subtilis. SiO2 NPs play no antimicrobial role. Parallel antimicrobial studies for the filter-sterilized gentamicin were performed to assess the effect of ultraviolet (UV)-irradiation on gentamicin. In summary, the initial fast gentamicin release fits the need for high concentration of antibiotics after orthopedic surgical interventions. Moreover, the extended release justifies the promising antimicrobial administration of the nanohybrids in bone applications.
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Affiliation(s)
- Dina Ahmed Mosselhy
- Department of Materials Science and Engineering, School of Chemical Technology, Aalto University, 02150 Espoo, Finland.
- Microbiological Unit, Fish Diseases Department, Animal Health Research Institute, Dokki, 12618 Giza, Egypt.
| | - Yanling Ge
- Department of Materials Science and Engineering, School of Chemical Technology, Aalto University, 02150 Espoo, Finland.
| | - Michael Gasik
- Department of Materials Science and Engineering, School of Chemical Technology, Aalto University, 02150 Espoo, Finland.
| | - Katrina Nordström
- Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, 02150 Espoo, Finland.
| | - Olli Natri
- Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, 02150 Espoo, Finland.
| | - Simo-Pekka Hannula
- Department of Materials Science and Engineering, School of Chemical Technology, Aalto University, 02150 Espoo, Finland.
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23
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Lin L, Guo L, Zhang W, Cai X, Chen D, Wan X. Novel Silicone-Coated 125I Seeds for the Treatment of Extrahepatic Cholangiocarcinoma. PLoS One 2016; 11:e0147701. [PMID: 26840346 PMCID: PMC4740417 DOI: 10.1371/journal.pone.0147701] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 01/07/2016] [Indexed: 01/01/2023] Open
Abstract
125I seeds coated with titanium are considered a safe and effective interstitial brachytherapy for tumors, while the cost of 125I seeds is a major problem for the patients implanting lots of seeds. The aim of this paper was to develop a novel silicone coating for 125I seeds with a lower cost. In order to show the radionuclide utilization ratio, the silicone was coated onto the seeds using the electro-spinning method and the radioactivity was evaluated, then the anti-tumor efficacy of silicone 125I seeds was compared with titanium 125I seeds. The seeds were divided into four groups: A (control), B (pure silicone), C (silicone 125I), D (titanium 125I) at 2 Gy or 4 Gy. Their anti-tumour activity and mechanism were assessed in vitro and in vivo using a human extrahepatic cholangiocarcinoma cell line FRH-0201 and tumor-bearing BALB/c nude mice. The silicone 125I seeds showed higher radioactivity; the rate of cell apoptosis in vitro and the histopathology in vivo demonstrated that the silicone 125I seeds shared similar anti-tumor efficacy with the titanium 125I seeds for the treatment of extrahepatic cholangiocarcinoma, while they have a much lower cost.
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Affiliation(s)
- Lizhou Lin
- Department of Gastroenterology, Shanghai First People’s Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200080, People’s Republic of China
| | - Lili Guo
- Department of Gastroenterology, Shanghai First People’s Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200080, People’s Republic of China
| | - Weixing Zhang
- Department of Gastroenterology, Shanghai First People’s Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200080, People’s Republic of China
| | - Xiaobo Cai
- Department of Gastroenterology, Shanghai First People’s Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200080, People’s Republic of China
| | - Dafan Chen
- Department of Gastroenterology, Shanghai First People’s Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200080, People’s Republic of China
| | - Xinjian Wan
- Department of Gastroenterology, Shanghai First People’s Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200080, People’s Republic of China
- * E-mail:
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24
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Mateescu M, Baixe S, Garnier T, Jierry L, Ball V, Haikel Y, Metz-Boutigue MH, Nardin M, Schaaf P, Etienne O, Lavalle P. Antibacterial Peptide-Based Gel for Prevention of Medical Implanted-Device Infection. PLoS One 2015; 10:e0145143. [PMID: 26659616 PMCID: PMC4682826 DOI: 10.1371/journal.pone.0145143] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Accepted: 12/01/2015] [Indexed: 12/27/2022] Open
Abstract
Implanted medical devices are prone to infection. Designing new strategies to reduce infection and implant rejection are an important challenge for modern medicine. To this end, in the last few years many hydrogels have been designed as matrices for antimicrobial molecules destined to fight frequent infection found in moist environments like the oral cavity. In this study, two types of original hydrogels containing the antimicrobial peptide Cateslytin have been designed. The first hydrogel is based on alginate modified with catechol moieties (AC gel). The choice of these catechol functional groups which derive from mussel’s catechol originates from their strong adhesion properties on various surfaces. The second type of gel we tested is a mixture of alginate catechol and thiol-terminated Pluronic (AC/PlubisSH), a polymer derived from Pluronic, a well-known biocompatible polymer. This PlubisSH polymer has been chosen for its capacity to enhance the cohesion of the composition. These two gels offer new clinical uses, as they can be injected and jellify in a few minutes. Moreover, we show these gels strongly adhere to implant surfaces and gingiva. Once gelled, they demonstrate a high level of rheological properties and stability. In particular, the dissipative energy of the (AC/PlubisSH) gel detachment reaches a high value on gingiva (10 J.m-2) and on titanium alloys (4 J.m-2), conferring a strong mechanical barrier. Moreover, the Cateslytin peptide in hydrogels exhibited potent antimicrobial activities against P. gingivalis, where a strong inhibition of bacterial metabolic activity and viability was observed, indicating reduced virulence. Gel biocompatibility tests indicate no signs of toxicity. In conclusion, these new hydrogels could be ideal candidates in the prevention and/or management of periimplant diseases.
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Affiliation(s)
- Mihaela Mateescu
- Institut National de la Santé Et de la Recherche Médicale, Unité Mixte de Recherche-S 1121, Biomatériaux et Bioingénierie, Strasbourg, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France
| | - Sébastien Baixe
- Institut National de la Santé Et de la Recherche Médicale, Unité Mixte de Recherche-S 1121, Biomatériaux et Bioingénierie, Strasbourg, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France
| | - Tony Garnier
- Institut Charles Sadron, Centre National de la Recherche Scientifique, Université de Strasbourg, Strasbourg, France
| | - Loic Jierry
- Institut Charles Sadron, Centre National de la Recherche Scientifique, Université de Strasbourg, Strasbourg, France
| | - Vincent Ball
- Institut National de la Santé Et de la Recherche Médicale, Unité Mixte de Recherche-S 1121, Biomatériaux et Bioingénierie, Strasbourg, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France
| | - Youssef Haikel
- Institut National de la Santé Et de la Recherche Médicale, Unité Mixte de Recherche-S 1121, Biomatériaux et Bioingénierie, Strasbourg, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France
| | - Marie Hélène Metz-Boutigue
- Institut National de la Santé Et de la Recherche Médicale, Unité Mixte de Recherche-S 1121, Biomatériaux et Bioingénierie, Strasbourg, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France
| | - Michel Nardin
- Institut de Science des Matériaux de Mulhouse, Centre National de la Recherche Scientifique LRC 7228, Mulhouse, France
| | - Pierre Schaaf
- Institut National de la Santé Et de la Recherche Médicale, Unité Mixte de Recherche-S 1121, Biomatériaux et Bioingénierie, Strasbourg, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France
- Institut Charles Sadron, Centre National de la Recherche Scientifique, Université de Strasbourg, Strasbourg, France
| | - Olivier Etienne
- Institut National de la Santé Et de la Recherche Médicale, Unité Mixte de Recherche-S 1121, Biomatériaux et Bioingénierie, Strasbourg, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France
- * E-mail:
| | - Philippe Lavalle
- Institut National de la Santé Et de la Recherche Médicale, Unité Mixte de Recherche-S 1121, Biomatériaux et Bioingénierie, Strasbourg, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France
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25
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Perumal S, Ramadass SK, Gopinath A, Madhan B, Shanmugam G, Rajadas J, Mandal AB. Altering the concentration of silica tunes the functional properties of collagen–silica composite scaffolds to suit various clinical requirements. J Mech Behav Biomed Mater 2015; 52:131-138. [DOI: 10.1016/j.jmbbm.2015.04.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 03/30/2015] [Accepted: 04/01/2015] [Indexed: 11/27/2022]
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26
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Sun R, Wang W, Wen Y, Zhang X. Recent Advance on Mesoporous Silica Nanoparticles-Based Controlled Release System: Intelligent Switches Open up New Horizon. NANOMATERIALS (BASEL, SWITZERLAND) 2015; 5:2019-2053. [PMID: 28347110 PMCID: PMC5304765 DOI: 10.3390/nano5042019] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 10/25/2015] [Accepted: 10/28/2015] [Indexed: 12/18/2022]
Abstract
Mesoporous silica nanoparticle (MSN)-based intelligent transport systems have attracted many researchers' attention due to the characteristics of uniform pore and particle size distribution, good biocompatibility, high surface area, and versatile functionalization, which have led to their widespread application in diverse areas. In the past two decades, many kinds of smart controlled release systems were prepared with the development of brilliant nano-switches. This article reviews and discusses the advantages of MSN-based controlled release systems. Meanwhile, the switching mechanisms based on different types of stimulus response are systematically analyzed and summarized. Additionally, the application fields of these devices are further discussed. Obviously, the recent evolution of smart nano-switches promoted the upgrading of the controlled release system from the simple "separated" switch to the reversible, multifunctional, complicated logical switches and selective switches. Especially the free-blockage switches, which are based on hydrophobic/hydrophilic conversion, have been proposed and designed in the last two years. The prospects and directions of this research field are also briefly addressed, which could be better used to promote the further development of this field to meet the needs of mankind.
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Affiliation(s)
- Ruijuan Sun
- Research Center for Bioengineering & Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
| | - Wenqian Wang
- Research Center for Bioengineering & Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
| | - Yongqiang Wen
- Research Center for Bioengineering & Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
| | - Xueji Zhang
- Research Center for Bioengineering & Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
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Local, Controlled Delivery of Local Anesthetics In Vivo from Polymer - Xerogel Composites. Pharm Res 2015; 33:729-38. [PMID: 26555665 DOI: 10.1007/s11095-015-1822-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 11/02/2015] [Indexed: 11/27/2022]
Abstract
PURPOSE Polymer-xerogel composite materials have been introduced to better optimize local anesthetics release kinetics for the pain management. In a previous study, it was shown that by adjusting various compositional and nano-structural properties of both inorganic xerogels and polymers, zero-order release kinetics over 7 days can be achieved in vitro. In this study, in vitro release properties are confirmed in vivo using a model that tests for actual functionality of the released local anesthetics. METHODS Composite materials made with tyrosine-polyethylene glycol(PEG)-derived poly(ether carbonate) copolymers and silica-based sol-gel (xerogel) were synthesized. The in vivo release from the composite controlled release materials was demonstrated by local anesthetics delivery in a rat incisional pain model. RESULTS The tactile allodynia resulting from incision was significantly attenuated in rats receiving drug-containing composites compared with the control and sham groups for the duration during which natural healing had not yet taken place. The concentration of drug (bupivacaine) in blood is dose dependent and maintained stable up to 120 h post-surgery, the longest time point measured. CONCLUSIONS These in vivo studies show that polymer-xerogel composite materials with controlled release properties represent a promising class of controlled release materials for pain management.
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Qu H, Bhattacharyya S, Ducheyne P. Silicon oxide based materials for controlled release in orthopedic procedures. Adv Drug Deliv Rev 2015; 94:96-115. [PMID: 26032046 DOI: 10.1016/j.addr.2015.05.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 05/21/2015] [Accepted: 05/25/2015] [Indexed: 12/14/2022]
Abstract
By virtue of excellent tissue responses in bone tissue, silicon oxide (silica) based materials have been used for bone tissue engineering. Creating nanoscale porosity within silica based materials expands their applications into the realm of controlled release area. This additional benefit of silica based materials widens their application in the orthopedic fields in a major way. This review discusses the various chemical and physical forms of silica based controlled release materials, the release mechanisms, the applications in orthopedic procedures and their overall biocompatibility.
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29
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Percutaneous external fixator pins with bactericidal micron-thin sol–gel films for the prevention of pin tract infection. Biomaterials 2015; 62:95-105. [DOI: 10.1016/j.biomaterials.2015.05.041] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 05/19/2015] [Accepted: 05/24/2015] [Indexed: 11/20/2022]
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30
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Bharti C, Nagaich U, Pal AK, Gulati N. Mesoporous silica nanoparticles in target drug delivery system: A review. Int J Pharm Investig 2015; 5:124-33. [PMID: 26258053 PMCID: PMC4522861 DOI: 10.4103/2230-973x.160844] [Citation(s) in RCA: 356] [Impact Index Per Article: 39.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Due to lack of specification and solubility of drug molecules, patients have to take high doses of the drug to achieve the desired therapeutic effects for the treatment of diseases. To solve these problems, there are various drug carriers present in the pharmaceuticals, which can used to deliver therapeutic agents to the target site in the body. Mesoporous silica materials become known as a promising candidate that can overcome above problems and produce effects in a controllable and sustainable manner. In particular, mesoporous silica nanoparticles (MSNs) are widely used as a delivery reagent because silica possesses favorable chemical properties, thermal stability, and biocompatibility. The unique mesoporous structure of silica facilitates effective loading of drugs and their subsequent controlled release of the target site. The properties of mesoporous, including pore size, high drug loading, and porosity as well as the surface properties, can be altered depending on additives used to prepare MSNs. Active surface enables functionalization to changed surface properties and link therapeutic molecules. They are used as widely in the field of diagnosis, target drug delivery, bio-sensing, cellular uptake, etc., in the bio-medical field. This review aims to present the state of knowledge of silica containing mesoporous nanoparticles and specific application in various biomedical fields.
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Affiliation(s)
- Charu Bharti
- Department of Pharmaceutics, School of Pharmacy, Bharat Institute of Technology, Partapur By Pass Road, Meerut, Uttar Pradesh, India
| | - Upendra Nagaich
- Department of Pharmaceutics, Amity Institute of Pharmacy, Amity university, Noida, Uttar Pradesh, India
| | - Ashok Kumar Pal
- Department of Pharmaceutics, School of Pharmacy, Bharat Institute of Technology, Partapur By Pass Road, Meerut, Uttar Pradesh, India
| | - Neha Gulati
- Department of Pharmaceutics, School of Pharmacy, Bharat Institute of Technology, Partapur By Pass Road, Meerut, Uttar Pradesh, India
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31
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Andreani T, Silva AM, Souto EB. Silica-based matrices: State of the art and new perspectives for therapeutic drug delivery. Biotechnol Appl Biochem 2015; 62:754-64. [PMID: 25471460 DOI: 10.1002/bab.1322] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 11/21/2014] [Indexed: 01/18/2023]
Abstract
Colloidal carriers based on silica (Si) matrices are an innovative approach within the context of therapeutic drug delivery systems. These carriers are emerging as a great promise for diagnosis and treatment of a wide range of injuries, particularly in cancer and infectious diseases. In addition, bioencapsulation for biosensing and cell therapy in silica sol-gel allows the survival of enzymes and cells for a long period of time. Owing to their porosity, large surface area, and high capability of functionalization, silica nanoparticles (SiNP) have been considered as an attractive option for several bioanalysis applications, such as selective bioseparation, imaging, and drug and gene delivery. However, although great advances are achieved in the biomedical fields, some toxicity effects can be associated with the use of SiNP. This article aims to present a comprehensive review of recent technological advances for silica matrices in biomedical applications, as well as the potential impact of silica-based materials on human health and environment.
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Affiliation(s)
- Tatiana Andreani
- Department of Biology and Environment, University of Tras-os Montes e Alto Douro, Vila Real, Portugal.,Centre for Research and Technology of Agro-Environmental and Biological Sciences, University of Tras-os Montes e Alto Douro, Vila Real, Portugal.,Center for Neuroscience and Cell Biology (CNC), University of Coimbra (FFUC), Coimbra, Portugal
| | - Amélia M Silva
- Department of Biology and Environment, University of Tras-os Montes e Alto Douro, Vila Real, Portugal.,Centre for Research and Technology of Agro-Environmental and Biological Sciences, University of Tras-os Montes e Alto Douro, Vila Real, Portugal
| | - Eliana B Souto
- Center for Neuroscience and Cell Biology (CNC), University of Coimbra (FFUC), Coimbra, Portugal.,Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Coimbra, Portugal
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32
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Quercetin encapsulation in modified silica nanoparticles: potential use against Cu(II)-induced oxidative stress in neurodegeneration. J Inorg Biochem 2015; 145:51-64. [DOI: 10.1016/j.jinorgbio.2015.01.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 01/04/2015] [Accepted: 01/04/2015] [Indexed: 01/08/2023]
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33
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Dual-setting brushite-silica gel cements. Acta Biomater 2015; 11:467-76. [PMID: 25263032 DOI: 10.1016/j.actbio.2014.09.036] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 08/19/2014] [Accepted: 09/21/2014] [Indexed: 11/21/2022]
Abstract
The current study describes a dual-mechanism-setting cement that combines a brushite-forming cement paste with a second inorganic silica-based precursor. Materials were obtained by pre-hydrolyzing tetraethyl orthosilicate (TEOS) under acidic conditions following the addition of a calcium phosphate cement (CPC) powder mixed of β-tricalcium phosphate and monocalcium phosphate. Cement setting occurred by a dissolution-precipitation process, while changes in pH during setting simultaneously initiated the condensation reaction of the hydrolyzed TEOS. This resulted in an interpenetrating phase composite material in which the macropores of the CPC were infiltrated by the microporous silica gel, leading to a higher density and a compressive strength ∼5-10 times higher than the CPC reference. This also altered the release of vancomycin as a model drug, whereby in contrast to the quantitative release from the CPC reference, 25% of the immobilized drug remained in the composite matrix. By varying the TEOS content in the composite, the cement phase composition could be controlled to form either brushite, anhydrous monetite or a biphasic mixture of both. The composites with the highest silicate content showed a cell proliferation similar to a hydroxyapatite reference with a significantly higher activity per cell. Surprisingly, the biological response did not seem to be attributed to the released silicate ions, but to the release of phosphate and the adsorption of magnesium ions from the cell culture medium.
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34
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Chen R, Qu H, Guo S, Ducheyne P. The design and synthesis of a soluble composite silica xerogel and the short-time release of proteins. J Mater Chem B 2015; 3:3141-3149. [DOI: 10.1039/c4tb01622j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The controlled release of large molecules (such as proteins) in a very short time (several days) was achieved through the co-hydrolysis and co-condensation of different precursors.
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Affiliation(s)
- Rong Chen
- The State Key Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- Chengdu
- China
- Department of Bioengineering
| | - Haibo Qu
- Department of Bioengineering
- Center for Bioactive Materials and Tissue Engineering
- University of Pennsylvania
- Philadelphia
- USA
| | - Shaoyun Guo
- The State Key Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- Chengdu
- China
| | - Paul Ducheyne
- Department of Bioengineering
- Center for Bioactive Materials and Tissue Engineering
- University of Pennsylvania
- Philadelphia
- USA
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35
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Ramadass SK, Perumal S, Gopinath A, Nisal A, Subramanian S, Madhan B. Sol-gel assisted fabrication of collagen hydrolysate composite scaffold: a novel therapeutic alternative to the traditional collagen scaffold. ACS APPLIED MATERIALS & INTERFACES 2014; 6:15015-15025. [PMID: 25105509 DOI: 10.1021/am502948g] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Collagen is one of the most widely used biomaterial for various biomedical applications. In this Research Article, we present a novel approach of using collagen hydrolysate, smaller fragments of collagen, as an alternative to traditionally used collagen scaffold. Collagen hydrolysate composite scaffold (CHCS) was fabricated with sol-gel transition procedure using tetraethoxysilane as the silica precursor. CHCS exhibits porous morphology with pore sizes varying between 380 and 780 μm. Incorporation of silica conferred CHCS with controlled biodegradation and better water uptake capacity. Notably, 3T3 fibroblast proliferation was seen to be significantly better under CHCS treatment when compared to treatment with collagen scaffold. Additionally, CHCS showed excellent antimicrobial activity against the wound pathogens Staphylococcus aureus, Bacillus subtilis, and Escherichia coli due to the inherited antimicrobial activity of collagen hydrolysate. In vivo wound healing experiments with full thickness excision wounds in rat model demonstrated that wounds treated with CHCS showed accelerated healing when compared to wounds treated with collagen scaffold. These findings indicate that the CHCS scaffold from collagen fragments would be an effective and affordable alternative to the traditionally used collagen structural biomaterials.
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36
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Recent update on implant surface tailoring to improve bone regenerative capacity. Tissue Eng Regen Med 2014. [DOI: 10.1007/s13770-014-0034-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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37
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Braga SS, Marques J, Heister E, Diogo CV, Oliveira PJ, Paz FAA, Santos TM, Marques MPM. Carriers for metal complexes on tumour cells: the effect of cyclodextrins vs CNTs on the model guest phenanthroline-5,6-dione trithiacyclononane ruthenium(II) chloride. Biometals 2014; 27:507-25. [DOI: 10.1007/s10534-014-9725-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 02/28/2014] [Indexed: 12/20/2022]
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38
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Sol–gel silica controlled release thin films for the inhibition of methicillin-resistant Staphylococcus aureus. Biomaterials 2014; 35:509-17. [DOI: 10.1016/j.biomaterials.2013.09.073] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 09/23/2013] [Indexed: 11/21/2022]
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39
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Alvarez GS, Hélary C, Mebert AM, Wang X, Coradin T, Desimone MF. Antibiotic-loaded silica nanoparticle–collagen composite hydrogels with prolonged antimicrobial activity for wound infection prevention. J Mater Chem B 2014; 2:4660-4670. [DOI: 10.1039/c4tb00327f] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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40
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Chen X, Cheng X, Soeriyadi AH, Sagnella SM, Lu X, Scott JA, Lowe SB, Kavallaris M, Gooding JJ. Stimuli-responsive functionalized mesoporous silica nanoparticles for drug release in response to various biological stimuli. Biomater Sci 2014; 2:121-130. [DOI: 10.1039/c3bm60148j] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Radin S, Bhattacharyya S, Ducheyne P. Nanostructural control of the release of macromolecules from silica sol-gels. Acta Biomater 2013; 9:7987-95. [PMID: 23643607 DOI: 10.1016/j.actbio.2013.04.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 04/04/2013] [Accepted: 04/24/2013] [Indexed: 11/15/2022]
Abstract
The therapeutic use of biological molecules such as growth factors and monoclonal antibodies is challenging in view of their limited half-life in vivo. This has elicited the interest in delivery materials that can protect these molecules until released over extended periods of time. Although previous studies have shown controlled release of biologically functional BMP-2 and TGF-β from silica sol-gels, more versatile release conditions are desirable. This study focuses on the relationship between room temperature processed silica sol-gel synthesis conditions and the nanopore size and size distribution of the sol-gels. Furthermore, the effect on release of large molecules with a size up to 70kDa is determined. Dextran, a hydrophilic polysaccharide, was selected as a large model molecule at molecular sizes of 10, 40 and 70kDa, as it enabled us to determine a size effect uniquely without possible confounding chemical effects arising from the various molecules used. Previously, acid catalysis was performed at a pH value of 1.8 below the isoelectric point of silica. Herein the silica synthesis was pursued using acid catalysis at either pH 1.8 or 3.05 first, followed by catalysis at higher values by adding base. This results in a mesoporous structure with an abundance of pores around 3.5nm. The data show that all molecular sizes can be released in a controlled manner. The data also reveal a unique in vivo approach to enable release of large biological molecules: the use more labile sol-gel structures by acid catalyzing above the pH value of the isoelectric point of silica; upon immersion in a physiological fluid the pores expand to reach an average size of 3.5nm, thereby facilitating molecular out-diffusion.
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Affiliation(s)
- Shula Radin
- Department of Bioengineering, Center for Bioactive Materials and Tissue Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
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42
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Sanchez CJ, Prieto EM, Krueger CA, Zienkiewicz KJ, Romano DR, Ward CL, Akers KS, Guelcher SA, Wenke JC. Effects of local delivery of D-amino acids from biofilm-dispersive scaffolds on infection in contaminated rat segmental defects. Biomaterials 2013; 34:7533-43. [PMID: 23831189 DOI: 10.1016/j.biomaterials.2013.06.026] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Accepted: 06/14/2013] [Indexed: 01/10/2023]
Abstract
Infectious complications of open fractures continue to be a significant factor contributing to non-osseous union and extremity amputation. The persistence of bacteria within biofilms despite meticulous debridement and antibiotic therapy is believed to be a major cause of chronic infection. Considering the difficulties in treating biofilm-associated infections, the use of biofilm dispersal agents as a therapeutic strategy for the prevention of biofilm-associated infections has gained considerable interest. In this study, we investigated whether local delivery of D-Amino Acids (D-AAs), a biofilm dispersal agent, protects scaffolds from contamination and reduces microbial burden within contaminated rat segmental defects in vivo. In vitro testing on biofilms of clinical isolates of Staphylococcus aureus demonstrated that D-Met, D-Phe, D-Pro, and D-Trp were highly effective at dispersing and preventing biofilm formation individually, and the effect was enhanced for an equimolar mixture of D-AAs. Incorporation of D-AAs into polyurethane scaffolds as a mixture (1:1:1 D-Met:D-Pro:D-Trp) significantly reduced bacterial contamination on the scaffold surface in vitro and within bone when implanted into contaminated femoral segmental defects. Our results underscore the potential of local delivery of d-AAs for reducing bacterial contamination by targeting bacteria within biofilms, which may represent a treatment strategy for improving healing outcomes associated with open fractures.
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Affiliation(s)
- Carlos J Sanchez
- United States Army Institute of Surgical Research, Extremity Trauma and Regenerative Medicine Task Area, Fort Sam Houston, San Antonio, TX, USA
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43
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Ciriminna R, Fidalgo A, Pandarus V, Béland F, Ilharco LM, Pagliaro M. The Sol–Gel Route to Advanced Silica-Based Materials and Recent Applications. Chem Rev 2013; 113:6592-620. [DOI: 10.1021/cr300399c] [Citation(s) in RCA: 423] [Impact Index Per Article: 38.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Rosaria Ciriminna
- Istituto per lo Studio dei Materiali Nanostrutturati, CNR, via U. La
Malfa 153, 90146 Palermo, Italy
| | - Alexandra Fidalgo
- Centro de Química-Física
Molecular and IN-Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Complexo I, Av.
Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - Valerica Pandarus
- SiliCycle Inc., 2500, Parc-Technologique
Boulevard, Quebec City, Quebec G1P 4S6,
Canada
| | - François Béland
- SiliCycle Inc., 2500, Parc-Technologique
Boulevard, Quebec City, Quebec G1P 4S6,
Canada
| | - Laura M. Ilharco
- Centro de Química-Física
Molecular and IN-Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Complexo I, Av.
Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - Mario Pagliaro
- Istituto per lo Studio dei Materiali Nanostrutturati, CNR, via U. La
Malfa 153, 90146 Palermo, Italy
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44
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Abstract
Nanomedicine, the use of nanotechnology for biomedical applications, has potential to change the landscape of the diagnosis and therapy of many diseases. In the past several decades, the advancement in nanotechnology and material science has resulted in a large number of organic and inorganic nanomedicine platforms. Silica nanoparticles (NPs), which exhibit many unique properties, offer a promising drug delivery platform to realize the potential of nanomedicine. Mesoporous silica NPs have been extensively reviewed previously. Here we review the current state of the development and application of nonporous silica NPs for drug delivery and molecular imaging.
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Affiliation(s)
- Li Tang
- Department of Materials Science and Engineering, University of Illinois at Urbana–Champaign, Urbana, Illinois, 61801, USA
| | - Jianjun Cheng
- Department of Materials Science and Engineering, University of Illinois at Urbana–Champaign, Urbana, Illinois, 61801, USA
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45
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Rutenberg A, Vinogradov VV, Avnir D. Synthesis and enhanced thermal stability of albumins@alumina: towards injectable sol-gel materials. Chem Commun (Camb) 2013; 49:5636-8. [PMID: 23682354 DOI: 10.1039/c3cc41696h] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A major obstacle to the introduction of bioactively-doped sol-gel based materials for medical applications has been the fact that silica - the most widely studied sol-gel material - despite being a GRAS material, which is widely used as an additive in foods and drug formulations, is still not approved by regulatory agencies for intramuscular injections. Here we point to a potential solution to this problem by shifting the weight to alumina, which is approved for injections as the most common immunization adjuvant. Towards the achievement of this goal we describe the development of protein entrapment methods tailored to alumina, and show high thermal stability of protein-dopants, using a newly developed DSC methodology for this purpose.
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Affiliation(s)
- Avi Rutenberg
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
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46
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Costache MC, Vaughan AD, Qu H, Ducheyne P, Devore DI. Tyrosine-derived polycarbonate-silica xerogel nanocomposites for controlled drug delivery. Acta Biomater 2013; 9:6544-52. [PMID: 23395749 DOI: 10.1016/j.actbio.2013.01.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Revised: 01/14/2013] [Accepted: 01/29/2013] [Indexed: 11/29/2022]
Abstract
Biodegradable polymer-ceramic composites offer significant potential advantages in biomedical applications where the properties of either polymers or ceramics alone are insufficient to meet performance requirements. Here we demonstrate the highly tunable mechanical and controlled drug delivery properties accessible with novel biodegradable nanocomposites prepared by non-covalent binding of silica xerogels and co-polymers of tyrosine-poly(ethylene glycol)-derived poly(ether carbonate). The Young's moduli of the nanocomposites exceed by factors of 5-20 times those of the co-polymers or of composites made with micron scale silica particles. Increasing the fraction of xerogel in the nanocomposites increases the glass transition temperature and the mechanical strength, but decreases the equilibrium water content, which are all indicative of strong non-covalent interfacial interactions between the co-polymers and the silica nanoparticles. Sustained, tunable controlled release of both hydrophilic and hydrophobic therapeutic agents from the nanocomposites is demonstrated with two clinically significant drugs, rifampicin and bupivacaine. Bupivacaine exhibits an initial small burst release followed by slow release over the 7 day test period. Rifampicin release fits the diffusion-controlled Higuchi model and the amount released exceeds the dosage required for treatment of clinically challenging infections. These nanocomposites are thus attractive biomaterials for applications such as wound dressings, tissue engineering substrates and stents.
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Affiliation(s)
- M C Costache
- New Jersey Center for Biomaterials, Rutgers-The State University of New Jersey, Piscataway, NJ 08854, USA
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47
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Chen R, Qu H, Agrawal A, Guo S, Ducheyne P. Controlled release of small molecules from silica xerogel with limited nanoporosity. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:137-146. [PMID: 23053812 DOI: 10.1007/s10856-012-4783-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Accepted: 09/26/2012] [Indexed: 06/01/2023]
Abstract
Conventional sol-gel processing requires several distinct steps involving hydrolysis, condensation and drying to obtain a highly porous, glassy solid material. With the goal of achieving controlled release of small molecules, herein we focus on the acceleration of the condensation and drying steps by casting the hydrolyzed sol on a large open surface to achieve a denser 100 % silica xerogel structure. Thus, cast xerogel with a more limited porosity was prepared. The effect of synthesis parameters during sol-gel synthesis on the release kinetics of bupivacaine, vancomycin and cephalexin was investigated. The release kinetics fitted well with the Higuchi model, suggesting a diffusional release mechanism. Combining the release and nanostructure data, the formation mechanism of cast xerogel is described. Without introducing additional precursors or additives into sol-gel systems, sol-gel casting is an easy technique that further expands the applicability of sol-gel materials as excellent carriers for the controlled release of a variety of drugs.
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Affiliation(s)
- Rong Chen
- Department of Bioengineering, Center for Bioactive Materials and Tissue Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
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48
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Raucci MG, Guarino V, Ambrosio L. Biomimetic strategies for bone repair and regeneration. J Funct Biomater 2012; 3:688-705. [PMID: 24955638 PMCID: PMC4030995 DOI: 10.3390/jfb3030688] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Revised: 08/30/2012] [Accepted: 08/31/2012] [Indexed: 11/16/2022] Open
Abstract
The osseointegration rate of implants is related to their composition and surface roughness. Implant roughness favors both bone anchoring and biomechanical stability. Osteoconductive calcium phosphate (Ca-P) coatings promote bone healing and apposition, leading to the rapid biological fixation of implants. It has been clearly shown in many publications that Ca-P coating accelerates bone formation around the implant. This review discusses two main routes for the manufacturing of polymer-based osteoconductive scaffolds for tissue engineering, namely the incorporation of bioceramic particles in the scaffold and the coating of a scaffold with a thin layer of apatite through a biomimetic process.
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Affiliation(s)
- Maria G Raucci
- Institute of Composite and Biomedical Materials, National Research Council of Italy, P.le Tecchio 80, Naples 80125, Italy.
| | - Vincenzo Guarino
- Institute of Composite and Biomedical Materials, National Research Council of Italy, P.le Tecchio 80, Naples 80125, Italy.
| | - Luigi Ambrosio
- Institute of Composite and Biomedical Materials, National Research Council of Italy, P.le Tecchio 80, Naples 80125, Italy.
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49
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The Degradation and BMP Release Dynamics of Silica-Based Xerogels Modified by Adding Calcium and Magnesium or Sintering Process. ACTA ACUST UNITED AC 2012. [DOI: 10.4028/www.scientific.net/amm.151.378] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new mesoporous silica xerogel used as biodegradable material was synthesized by improved sol-gel methods. The xerogel’s degradation character and property of releasing character for bone morphological protein (BMP)were modified by adding calcium (Ca) and phosphor (P) elements into pure silica xerogel, and uesing sintering processes, as well as adding magnesium (Mg) into silica xerogel. The differential thermal and thermogravimetric analysis (DTA-TG), X-Ray diffraction analysis(XRD), Fourier infrared spectrum analysis (FITR), N2 adsorption-desorption analysis, Scanning electron microscope(SEM) and Transmitting electron microscope (TEM) observation were used to measure the thermal effects, crystalline state, pore diameter and specific surface area, surface morphology and inner structure of the xerogels. The xerogel’s degradability and BMP release were studied by simulated body fluid (SBF) immersion. The results indicated that the synthesized xerogels were mesoporous structure with pore diameter around 3 nm and the big specific surface area about 1000 m2/g.They were non crystall with hydroxyl and micro-molecular silica-oxygen groups. Xerogels dried at low sintering temperature degraded completely in 42 days in bursting manner and degraded in linear curves with sintering temperature increased as well as adding calcium and magnesium into xerogels. The BMP release behaviour from the Mg-xerogel dried naturally was in controlled manner.
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50
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Czarnobaj K, Sawicki W. Influence of surfactants on the release behaviour and structural properties of sol-gel derived silica xerogels embedded with metronidazole. Pharm Dev Technol 2011; 18:377-83. [PMID: 22107265 DOI: 10.3109/10837450.2011.635151] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The aim of this study was to obtain stable and controlled release silica xerogels containing metronidazole (MT) prepared with surfactants with different charges: cetyltrimethylammonium bromide (CTAB), sodium dodecyl sulphate (SDS) and hydroxypropyl cellulose (HPC), which could be the promising carrier materials used as the implantable drug delivery systems. The xerogels were prepared by the sol-gel method. The influence of various formulation precursors on porosity parameters and drug release were investigated. Addition of surfactants showed a promising result in controlling the MT release. Dissolution study revealed increased release of MT from silica modified SDS and CTAB, whereas the release of MT from silica modified HPC considerably decreased, in comparison with unmodified silica. The addition of surfactants showed slight changes in porosity parameters. All xerogels are characterized by a highly developed surface area (701-642 m(2) g(-1)) and mesoporous structure. The correlation between pore size obtained matrices and release rate of drug was also observed. Based on the presented results of this study, it may be stated that applied xerogel matrices: pure silica and surfactants-modified silica could be promising candidates for the formulation in local delivery systems.
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Affiliation(s)
- Katarzyna Czarnobaj
- Department of Physical Chemistry, Medical University of Gdańsk, Gdańsk, Poland
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