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Zhang YG, Zhu YJ, Chen F, Sun TW. A novel composite scaffold comprising ultralong hydroxyapatite microtubes and chitosan: preparation and application in drug delivery. J Mater Chem B 2017; 5:3898-3906. [DOI: 10.1039/c6tb02576e] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The composite scaffold comprising ultralong hydroxyapatite microtubes and chitosan with high drug loading capacity and sustained drug release properties has been successfully prepared.
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Affiliation(s)
- Yong-Gang Zhang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- P. R. China
| | - Ying-Jie Zhu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- P. R. China
| | - Feng Chen
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- P. R. China
| | - Tuan-Wei Sun
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- P. R. China
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Chen H, Xing X, Tan H, Jia Y, Zhou T, Chen Y, Ling Z, Hu X. Covalently antibacterial alginate-chitosan hydrogel dressing integrated gelatin microspheres containing tetracycline hydrochloride for wound healing. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 70:287-295. [DOI: 10.1016/j.msec.2016.08.086] [Citation(s) in RCA: 241] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Revised: 08/12/2016] [Accepted: 08/31/2016] [Indexed: 02/07/2023]
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Chen J, Liu Z, Chen M, Zhang H, Li X. Electrospun Gelatin Fibers with a Multiple Release of Antibiotics Accelerate Dermal Regeneration in Infected Deep Burns. Macromol Biosci 2016; 16:1368-80. [DOI: 10.1002/mabi.201600108] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 05/05/2016] [Indexed: 12/25/2022]
Affiliation(s)
- Jianmei Chen
- Key Laboratory of Advanced Technologies of Materials; Ministry of Education; School of Materials Science and Engineering; Southwest Jiaotong University; Chengdu 610031 P. R. China
- The First Affiliated Hospital; School of Medicine; Zhejiang University; Hangzhou 310003 P. R. China
| | - Zongguang Liu
- Key Laboratory of Advanced Technologies of Materials; Ministry of Education; School of Materials Science and Engineering; Southwest Jiaotong University; Chengdu 610031 P. R. China
- School of Materials Science and Engineering; State Key Laboratory of Silicon Materials; Zhejiang University; Hangzhou 310027 P. R. China
| | - Maohua Chen
- Key Laboratory of Advanced Technologies of Materials; Ministry of Education; School of Materials Science and Engineering; Southwest Jiaotong University; Chengdu 610031 P. R. China
| | - Hong Zhang
- Key Laboratory of Advanced Technologies of Materials; Ministry of Education; School of Materials Science and Engineering; Southwest Jiaotong University; Chengdu 610031 P. R. China
| | - Xiaohong Li
- Key Laboratory of Advanced Technologies of Materials; Ministry of Education; School of Materials Science and Engineering; Southwest Jiaotong University; Chengdu 610031 P. R. China
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Arpaçay P, Türkan U. Development of antibiotic-loaded silk fibroin/hyaluronic acid polyelectrolyte film coated CoCrMo alloy. ACTA ACUST UNITED AC 2016; 61:463-474. [DOI: 10.1515/bmt-2015-0061] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2015] [Accepted: 09/30/2015] [Indexed: 12/16/2022]
Abstract
AbstractBacteria related infections are still a major problem for the implant materials. Such infections have occurred in nearly 3% of hip and knee replacements resulting in failure of device. There are two main approaches for inhibiting the bacterial adhesion to the surface. These involve bactericidal substances and anti-adhesive coatings. In this study, the efficiency of antibiotic-loaded silk fibroin/hyaluronic acid polyelectrolyte film coated CoCrMo alloy, prepared by means of complex coacervate and layer by layer techniques, was investigated. A medical grade CoCrMo was coated with variable number of silk fibroin/hyaluronic acid up to 14 layers at room temperature. The morphological evolution during and after formation of the crystal structure on the coating layer, the resulting surface roughness, and the corresponding alterations in the coating layer thicknesses were thoroughly studied using various analytical techniques, including attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM). As a result, only 10 layers of silk fibroin/hyaluronic acid complex coacervate films were found to convey the general characteristics of the mixture of silk I and II, while layer by layer coated samples exhibited the mixture of silk I and II. Moreover, regardless of the preparation method applied, the surface roughness and the coating layer thicknesses were determined to increase with the increasing number of layers. The antibacterial test results suggested that the samples loaded with antibiotic successfully induced a bactericidal resistance against
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55
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Chen X, Zhou R, Chen B, Chen J. Nanohydroxyapatite/cellulose nanocrystals/silk fibroin ternary scaffolds for rat calvarial defect regeneration. RSC Adv 2016. [DOI: 10.1039/c6ra02038k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The purpose of this study was to design and characterise a novel biomimetic scaffold for the repair of critical size calvarial defects.
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Affiliation(s)
- Xiaoming Chen
- Department of Orthopedic Spinal Surgery
- Nanfang Hospital
- Southern Medical University
- Guangzhou 510515
- China
| | - Runmei Zhou
- Department of Pharmacy
- The 2nd Affiliated Hospital
- University of South China
- Hengyang 421001
- China
| | - Bin Chen
- Department of Orthopedic Spinal Surgery
- Chenzhou No. 1 People's Hospital
- Chenzhou 423000
- China
| | - Jianting Chen
- Department of Orthopedic Spinal Surgery
- Nanfang Hospital
- Southern Medical University
- Guangzhou 510515
- China
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56
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Türkan U, Arpaçay P. Effects of pH on the silk fibroin coating of CoCrMo alloy. SCANNING 2016; 38:80-88. [PMID: 25970826 DOI: 10.1002/sca.21224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 04/22/2015] [Accepted: 04/29/2015] [Indexed: 06/04/2023]
Abstract
Bacteria related infections are still cited as a major problem for the implant materials resulting in failure of device especially knee and hip replacement. Two main approaches are focused for inhibiting the bacterial adhesion to the surface. These involve bactericidal substances and anti-adhesive coatings. Silk fibroin is one of the promising materials due to its good drug loading capacity and efficiency. In this study, the effects of pH on the silk fibroin coating of CoCrMo alloy, prepared by means of layer by layer, was investigated thoroughly using scanning electron microscope (SEM), Atomic Force Microscope (AFM) Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) Spectroscopy. A medical grade CoCrMo was coated with variable number of silk fibroin up to 14 layers at pH 3.0, 3.5, and 5.5 at room temperature. As a result, only silk fibroin films prepared at pH 3.0 and 3.5 were found to convey the general characteristics of the mixture of silk I and II, while the samples prepared at pH 5.5 exhibited the lack of some specific amide structures which influence the general characteristics of silk I and II. Moreover, regardless of pH, the surface roughness was determined to increase with the increasing number of layers. However, as the pH increases the surface roughness decreases at 6, 10 and 14 layers.
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Affiliation(s)
- Uğur Türkan
- Department of Biomedical Engineering, Gediz University, Seyrekköy, Menemen, Izmir, Turkey
| | - Pınar Arpaçay
- Nanotechnology Graduate Program, Gediz University, Seyrekköy, Menemen, Izmir, Turkey
- CRANN and AMBER Research Centers, Trinity College Dublin, Dublin 2, Ireland
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Mahmoud AA, Salama AH. Norfloxacin-loaded collagen/chitosan scaffolds for skin reconstruction: Preparation, evaluation and in-vivo wound healing assessment. Eur J Pharm Sci 2015; 83:155-65. [PMID: 26733072 DOI: 10.1016/j.ejps.2015.12.026] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 12/02/2015] [Accepted: 12/20/2015] [Indexed: 01/28/2023]
Abstract
Biomaterial scaffolds are versatile tools as drug carrier for treatment of wounds. A series of norfloxacin-loaded scaffolds were synthesized for treatment of wounds by combining collagen with two different types of chitosan using freeze-drying technique. Subsequently, scaffolds were screened in terms of morphology, water absorption and retention capacity, biodegradation, ex-vivo bioadhesive strength, in-vitro drug release biological compatibility, X-ray diffractometry, differential scanning calorimetry as well as in-vivo evaluation. The results indicate that the scaffold mechanical strength is dependent on the type of used chitosan. The prepared scaffolds contained interconnected porous architecture. The scaffolds had high water uptake and retention capacity with extended biodegradation rate. Scaffolds prepared with chitosan HCl showed superior bioadhesive strength compared to those prepared with low molecular weight chitosan. All scaffolds showed almost 100% drug release within 24h. As identified by the terahertz pulsed imaging measurements, there is single scaffold area with the same concentration. After 28 days of wound dressing with selected norfoloxacin-loaded or unloaded collagen/chitosan scaffolds in Albino rats, it was found that the tissue regeneration time was fast compared to non-treated wounds. Furthermore, the drug-loaded scaffolds showed normal structure of an intact epidermal layer as well as the underlying dermis as revealed by histopathological studies. The obtained results suggest that the investigated norfloxacin-loaded collagen/chitosan scaffold is a potential candidate for skin regeneration application.
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Affiliation(s)
- Azza A Mahmoud
- Department of Pharmaceutical Technology, National Research Center, Dokki, Cairo, Egypt; Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Future University in Egypt, Cairo, Egypt
| | - Alaa H Salama
- Department of Pharmaceutical Technology, National Research Center, Dokki, Cairo, Egypt
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58
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Synthesis, characterization of dextran hydrogels and their in vitro release of gentamycin sulphate. J Appl Biomater Funct Mater 2015; 13:e228-33. [PMID: 26350349 DOI: 10.5301/jabfm.5000233] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/25/2015] [Indexed: 11/20/2022] Open
Abstract
PURPOSE This study reports on the synthesis and characterization of biodegradable dextran-allyl isocyanate-ethylamine (Dex-AE)/polyethylene glycol-diacrylate (PEGDA) hydrogels for the controlled release of gentamycin sulphate (GS) and in vitro inhibition of organisms. METHODS The Dex-AE precursor was prepared through a 2-step chemical modification and characterized by Fourier transform infrared spectroscopy (FTIR). RESULTS Scanning electron microscopy (SEM) results revealed that an increase in Dex-AE content led to an initial decrease in pore size of the Dex-AE/PEGDA hydrogels, but a further increase in Dex-AE content resulted in a slightly increase of pore size. The swelling data indicated that the swelling ratio depended on the precursor feed ratio. GS was incorporated into the hydrogels through 2 different methods, i.e., immersed and crosslinked. The crosslinked GS-Dex-AE/PEGDA hydorgels exhibited stronger antimicrobial activities against Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa. Finally, the viscoelastic properties of crosslinked GS-Dex-AE/PEGDA hydorgels were investigated.
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59
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In vivo bioresponses to silk proteins. Biomaterials 2015; 71:145-157. [PMID: 26322725 DOI: 10.1016/j.biomaterials.2015.08.039] [Citation(s) in RCA: 286] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 08/15/2015] [Accepted: 08/18/2015] [Indexed: 12/22/2022]
Abstract
Silks are appealing materials for numerous biomedical applications involving drug delivery, tissue engineering, or implantable devices, because of their tunable mechanical properties and wide range of physical structures. In addition to the functionalities needed for specific clinical applications, a key factor necessary for clinical success for any implanted material is appropriate interactions with the body in vivo. This review summarizes our current understanding of the in vivo biological responses to silks, including degradation, the immune and inflammatory response, and tissue remodeling with particular attention to vascularization. While we focus in this review on silkworm silk fibroin protein due to the large quantity of in vivo data thanks to its widespread use in medical materials and consumer products, spider silk information is also included if available. Silk proteins are degraded in the body on a time course that is dependent on the method of silk fabrication and can range from hours to years. Silk protein typically induces a mild inflammatory response that decreases within a few weeks of implantation. The response involves recruitment and activation of macrophages and may include activation of a mild foreign body response with the formation of multinuclear giant cells, depending on the material format and location of implantation. The number of immune cells present decreases with time and granulation tissue, if formed, is replaced by endogenous, not fibrous, tissue. Importantly, silk materials have not been demonstrated to induce mineralization, except when used in calcified tissues. Due to its ability to be degraded, silk can be remodeled in the body allowing for vascularization and tissue ingrowth with eventual complete replacement by native tissue. The degree of remodeling, tissue ingrowth, or other specific cell behaviors can be modulated with addition of growth or other signaling factors. Silk can also be combined with numerous other materials including proteins, synthetic polymers, and ceramics to enhance its characteristics for a particular function. Overall, the diverse array of silk materials shows excellent bioresponses in vivo with low immunogenicity and the ability to be remodeled and replaced by native tissue making it suitable for numerous clinical applications.
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60
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Zhang X, Guo R, Xu J, Lan Y, Jiao Y, Zhou C, Zhao Y. Poly(l-lactide)/halloysite nanotube electrospun mats as dual-drug delivery systems and their therapeutic efficacy in infected full-thickness burns. J Biomater Appl 2015; 30:512-25. [DOI: 10.1177/0885328215593837] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this study, poly(l-lactide) (PLLA)/halloysite nanotube (HNT) electrospun mats were prepared as a dual-drug delivery system. HNTs were used to encapsulate polymyxin B sulphate (a hydrophilic drug). Dexamethasone (a hydrophobic drug) was directly dissolved in the PLLA solution. The drug-loaded HNTs with optimised encapsulation efficiency were then mixed with the PLLA solution for subsequent electrospinning to form composite dual-drug-loaded fibre mats. The structure, morphology, degradability and mechanical properties of the electrospun composite mats were characterised in detail. The results showed that the HNTs were uniformly distributed in the composite PLLA mats. The HNTs content in the mats could change the morphology and average diameter of the electrospun fibres. The HNTs improved both the tensile strength of the PLLA electrospun mats and their degradation ratio. The drug-release kinetics of the electrospun mats were investigated using ultraviolet-visible spectrophotometry. The HNTs/PLLA ratio could be varied to adjust the release of polymyxin B sulphate and dexamethasone. The antibacterial activity in vitro of the mats was evaluated using agar diffusion and turbidimetry tests, which indicated the antibacterial efficacy of the dual-drug delivery system against Gram-positive and -negative bacteria. Healing in vivo of infected full-thickness burns and infected wounds was investigated by macroscopic observation, histological observation and immunohistochemical staining. The results indicated that the electrospun mats were capable of co-loading and co-delivering hydrophilic and hydrophobic drugs, and could potentially be used as novel antibacterial wound dressings.
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Affiliation(s)
- Xiazhi Zhang
- Department of Materials Science and Engineering, Jinan University, Guangzhou, China
| | - Rui Guo
- Department of Biomedical Engineering, Jinan University, Guangzhou, China
| | - Jiqing Xu
- Department of Materials Science and Engineering, Jinan University, Guangzhou, China
| | - Yong Lan
- Department of Materials Science and Engineering, Jinan University, Guangzhou, China
| | - Yanpeng Jiao
- Department of Materials Science and Engineering, Jinan University, Guangzhou, China
| | - Changren Zhou
- Department of Materials Science and Engineering, Jinan University, Guangzhou, China
| | - Yaowu Zhao
- School of Medicine, Jinan University, Guangzhou, China
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61
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Liu Q, Huang Y, Lan Y, Zuo Q, Li C, Zhang Y, Guo R, Xue W. Acceleration of skin regeneration in full-thickness burns by incorporation of bFGF-loaded alginate microspheres into a CMCS-PVA hydrogel. J Tissue Eng Regen Med 2015; 11:1562-1573. [DOI: 10.1002/term.2057] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 01/25/2015] [Accepted: 04/29/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Quan Liu
- Key Laboratory of Biomaterials; Guangdong Higher Education Institutes; Guangzhou People's Republic of China
- Department of Biomedical Engineering; Jinan University; Guangzhou People's Republic of China
| | - Yuchen Huang
- Key Laboratory of Biomaterials; Guangdong Higher Education Institutes; Guangzhou People's Republic of China
- Department of Biomedical Engineering; Jinan University; Guangzhou People's Republic of China
| | - Yong Lan
- Key Laboratory of Biomaterials; Guangdong Higher Education Institutes; Guangzhou People's Republic of China
| | - Qinhua Zuo
- Key Laboratory of Biomaterials; Guangdong Higher Education Institutes; Guangzhou People's Republic of China
- Department of Biomedical Engineering; Jinan University; Guangzhou People's Republic of China
| | - Chenghua Li
- Key Laboratory of Biomaterials; Guangdong Higher Education Institutes; Guangzhou People's Republic of China
- Department of Biomedical Engineering; Jinan University; Guangzhou People's Republic of China
| | - Yi Zhang
- Key Laboratory of Biomaterials; Guangdong Higher Education Institutes; Guangzhou People's Republic of China
- Department of Biomedical Engineering; Jinan University; Guangzhou People's Republic of China
| | - Rui Guo
- Key Laboratory of Biomaterials; Guangdong Higher Education Institutes; Guangzhou People's Republic of China
- Department of Biomedical Engineering; Jinan University; Guangzhou People's Republic of China
| | - Wei Xue
- Key Laboratory of Biomaterials; Guangdong Higher Education Institutes; Guangzhou People's Republic of China
- Department of Biomedical Engineering; Jinan University; Guangzhou People's Republic of China
- Key Laboratory of Functional Protein Research; Guangdong Higher Education Institute; Guangzhou People's Republic of China
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62
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Monteiro N, Martins M, Martins A, Fonseca NA, Moreira JN, Reis RL, Neves NM. Antibacterial activity of chitosan nanofiber meshes with liposomes immobilized releasing gentamicin. Acta Biomater 2015; 18:196-205. [PMID: 25749293 DOI: 10.1016/j.actbio.2015.02.018] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 01/27/2015] [Accepted: 02/18/2015] [Indexed: 01/19/2023]
Abstract
Chitsan (Ch) nanofiber mesh (NFM) is a material with natural characteristics favoring its use in human wound dressing. The present work proposes a gentamicin-loaded liposome immobilized at the surface of Ch NFMs to promote its antibacterial activity. To achieve this purpose, Ch NFMs were functionalized with thiol groups, and gentamicin-loaded liposomes were covalently immobilized by the reaction of the SH groups with maleimide. The maximum concentration of SH groups (55.52±11.19nmolcm(-2)) was obtained at pH 7. A fluorescent dye was covalently bound to the SH groups present at the surface of electrospun Ch NFMs. Their spatial distribution was uniform throughout the NFMs when analyzed by fluorescence microscopy. Gentamicin was successfully encapsulated into the liposomes with an efficiency of 17%. Gentamicin-loaded liposomes were uniformly distributed at the surface of the Ch NFMs and the drug release kinetic showed a sustained release of gentamicin during 16h, achieving a steady state at 24h. The in vitro susceptibility tests confirmed that the gentamicin released from the liposomes immobilized at the surface of electrospun Ch NFM has bactericidal activity against Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus. The results show that the developed system has promising performance for wound dressing applications, avoiding infections caused by these common pathogens.
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Affiliation(s)
- Nelson Monteiro
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra S. Cláudio do Barco, 4806-909 Caldas das Taipas, Guimarães, Portugal; ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal.
| | - Margarida Martins
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra S. Cláudio do Barco, 4806-909 Caldas das Taipas, Guimarães, Portugal; ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal; IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar, Braga, Portugal.
| | - Albino Martins
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra S. Cláudio do Barco, 4806-909 Caldas das Taipas, Guimarães, Portugal; ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal.
| | - Nuno A Fonseca
- CNC - Center for Neurosciences and Cell Biology, FFUC - Faculty of Pharmacy and University of Coimbra, 3000 Coimbra, Portugal.
| | - João N Moreira
- CNC - Center for Neurosciences and Cell Biology, FFUC - Faculty of Pharmacy and University of Coimbra, 3000 Coimbra, Portugal.
| | - Rui L Reis
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra S. Cláudio do Barco, 4806-909 Caldas das Taipas, Guimarães, Portugal; ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal.
| | - Nuno M Neves
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra S. Cláudio do Barco, 4806-909 Caldas das Taipas, Guimarães, Portugal; ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal.
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Song J, Zhang P, Cheng L, Liao Y, Xu B, Bao R, Wang W, Liu W. Nano-silver in situ hybridized collagen scaffolds for regeneration of infected full-thickness burn skin. J Mater Chem B 2015; 3:4231-4241. [DOI: 10.1039/c5tb00205b] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Histidine incorporated into a collagen matrix was used as a template to chelate silver ions which were reduced to silver nanoparticles in situ.
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Affiliation(s)
- Junfei Song
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Pengfei Zhang
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Lu Cheng
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Yue Liao
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Bing Xu
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Rui Bao
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Wei Wang
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Wenguang Liu
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300072
- P. R. China
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Perni S, Prokopovich P. Continuous release of gentamicin from gold nanocarriers. RSC Adv 2014; 4:51904-51910. [PMID: 25580243 PMCID: PMC4285112 DOI: 10.1039/c4ra10023a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 10/08/2014] [Indexed: 11/21/2022] Open
Abstract
Antimicrobial activity of gentamicin can be extended through release from gold nanocarriers after conjugation.
Antibiotics are still the most effective agents used to fight bacterial infections. Antibiotics are quickly metabolised or excreted from the human body, thus they need to be frequently administered (a few times a day) and their half life is usually an important factor in the therapeutic choice. In order to render the administration less frequent, antibiotic release from a carrier can be employed. In this work we covalently bound gentamicin to gold nanoparticles capped with cysteine or glutathione as gold nanoparticles are biologically safe. The conjugates exhibited antimicrobial activity against both S. aureus and MRSA at concentrations as low as 0.1 mg NP per ml consistent with an antibiotic load of 1–2% w/w as determined through TGA. No antimicrobial activity was exhibited by the unconjugated nanoparticles. The release of gentamicin from the conjugates was monitor in buffer solutions at pH = 7 and the antibiotic concentration continued to increase over two days. This work demonstrates that gold nanoparticles can be employed as antibiotic carriers providing a continuous release of antibiotic over a few days. Glutathione appeared to be a better coupling agent than cysteine allowing a higher load of gentamicin resulting in lower inhibitory concentrations of the conjugates.
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Affiliation(s)
- Stefano Perni
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff, CF10 3NB, UK. ; ; Tel: +44 (0)29 208 75820 ; Center for Biomedical Engineering, Massachusetts Institute of Technology, Cambridge, USA
| | - Polina Prokopovich
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff, CF10 3NB, UK. ; ; Tel: +44 (0)29 208 75820 ; Center for Biomedical Engineering, Massachusetts Institute of Technology, Cambridge, USA
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