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Journal of Biomaterials Applications

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https://www.readbyqxmd.com/read/29463162/comparative-in-vivo-evaluation-of-novel-formulations-based-on-alginate-and-silver-nanoparticles-for-wound-treatments
#1
Jasmina Stojkovska, Zeljka Djurdjevic, Ivan Jancic, Biljana Bufan, Marina Milenkovic, Radmila Jankovic, Vesna Miskovic-Stankovic, Bojana Obradovic
In the present study, possibilities for using novel nanocomposites based on alginate and silver nanoparticles for wound treatment were investigated in a second-degree thermal burn model in Wistar rats. Silver nanoparticles (AgNPs) were electrochemically synthesized in alginate solutions that were further utilized to obtain the Ag/alginate solution and microfibers for subsequent in vivo studies. Daily applications of the Ag/alginate colloid solution, containing AgNPs, alginate and ascorbic acid (G3), wet Ag/alginate microfibers containing AgNPs (G5) and dry Ag/alginate microfibers containing AgNPs (G6) were compared to treatments with a commercial cream containing silver sulfadiazine (G2) and a commercial Ca-alginate wound dressing containing silver ions (G4), as well as to the untreated controls (G1)...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29451421/bionanocomposite-scaffolds-based-on-chitosan-gelatin-and-nanodimensional-bioactive-glass-particles-in-vitro-properties-and-in-vivo-bone-regeneration
#2
Cristian Covarrubias, Monserrat Cádiz, Miguel Maureira, Isabel Celhay, Felipe Cuadra, Alfredo von Marttens
Bone repair bionanocomposite scaffolds were produced by incorporating dense bioactive glass nanoparticles or mesoporous bioactive glass nanospheres into a chitosan-gelatin polymer blend. The in vitro bioactivity of the scaffolds was assessed in simulated body fluid, and cell viability and osteogenic differentiation assays were performed with dental pulp stem cells. Bone regeneration properties of the scaffold materials were in vivo assessed by using a critical-sized femoral defect model in rat. The scaffold nanocomposites showed excellent cytocompatibility and ability to accelerate the crystallization of bone-like apatite in vitro...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29448867/comparison-of-the-knitted-silk-vascular-grafts-coated-with-fibroin-sponges-prepared-using-glycerin-poly-ethylene-glycol-diglycidyl-ether-and-poly-ethylene-glycol-as-porogens
#3
Takashi Tanaka, Akiko Uemura, Ryo Tanaka, Yugo Tasei, Tetsuo Asakura
Development of a small-diameter artificial vascular graft is urgent because existing materials often occlude within a short time. We have shown that small-diameter vascular graft using Bombyx mori silk fibroin is a potential candidate. Silk fibroin grafts are fabricated by coating silk fibroin on the knit tube prepared from silk fibroin fibers. However, there is a serious problem that the coated silk fibroin portion hardens when alcohol is used for insolubilization of the coated silk fibroin. This hardening prevents the desired biodegradation of the coated silk fibroin...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29448866/multifunctional-mesoporous-silica-nanoparticles-as-efficient-transporters-of-doxorubicin-and-chlorin-e6-for-chemo-photodynamic-combinatorial-cancer-therapy
#4
Jing-Hua Sun, Wei Zhang, Dong-Yang Zhang, Jianliang Shen, Cai-Ping Tan, Liang-Nian Ji, Zong-Wan Mao
A multimodal nanocarrier based on mesoporous silica nanoparticles (MSNs) is developed to co-delivery photosensitizer chlorin e6 (Ce6) and chemotherapeutic agent doxorubicin (Dox) for cancer combination therapy. Ce6 was covalently conjugated with mesoporous silica nanoparticles, which could increase the loading efficiency, and allowed for photodynamic therapy. Doxorubicin was loaded into the pores of mesoporous silica nanoparticles to afford the dual drug delivery system Dox@MSNs-Ce6. These hybrid nanoparticles have an average diameter of about 100 nm and slightly negative charge of about -17 mV...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29417864/enhanced-silver-loaded-antibacterial-titanium-implant-coating-with-novel-hierarchical-effect
#5
Yanxian Zhang, Chaofang Dong, Sefei Yang, Te-Wei Chiu, Junsheng Wu, Kui Xiao, Yunhua Huang, Xiaogang Li
In this study, we present a novel strategy for hierarchical antibacterial implant coating by controlling structural and componential features as regulators of surface bactericidal property. Anodized titanium dioxide nanotubes and self-polymerized polydopamine were both used as preliminary antibacterial agents with a significant positive effect on surface bioactivity. At the same time, the storage capacity of nanotubes and the in situ reduction activity of polydopamine can introduce large amounts of strong attached silver nanoparticles for enhanced stable antibacterial performance...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29409376/suitability-of-a-plcl-fibrous-scaffold-for-soft-tissue-engineering-applications-a-combined-biological-and-mechanical-characterisation
#6
Cédric P Laurent, Cédryck Vaquette, Xing Liu, Jean-François Schmitt, Rachid Rahouadj
Poly(lactide-co-ε-caprolactone) (PLCL) has been reported to be a good candidate for tissue engineering because of its good biocompatibility. Particularly, a braided PLCL scaffold (PLL/PCL ratio = 85/15) has been recently designed and partially validated for ligament tissue engineering. In the present study, we assessed the in vivo biocompatibility of acellular and cellularised scaffolds in a rat model. We then determined its in vitro biocompatibility using stem cells issued from both bone marrow and Wharton Jelly...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29409375/films-based-on-soy-protein-agar-blends-for-wound-dressing-effect-of-different-biopolymer-proportions-on-the-drug-release-rate-and-the-physical-and-antibacterial-properties-of-the-films
#7
Josefina Rivadeneira, M C Audisio, Alejandro Gorustovich
No single material can provide all requirements for wound dressings. Here, we evaluated the influence of different soy protein isolate and agar proportions (3:1, 1:1, and 1:3) in blend films on some of their physical-chemical and antibacterial properties to elucidate their potential as wound dressings. The films were synthesized by the gel casting method and ciprofloxacin hydrochloride was incorporated into the films. Films were characterized based on their surface morphology, water uptake ability, and weight loss profile...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29392959/neural-stem-cell-encapsulation-and-differentiation-in-strain-promoted-crosslinked-polyethylene-glycol-based-hydrogels
#8
Hang Li, Jukuan Zheng, Huifeng Wang, Mathew L Becker, Nic D Leipzig
Encapsulated cell viability within crosslinked hydrogels is a critical factor to consider in regenerative medicine/cell delivery applications. Herein, a "click" hydrogel system is presented encompassing 4-dibenzocyclooctynol functionalized polyethylene glycol, a four arm polyethylene glycol tetraazide crosslinker, tethered native protein attachment ligands (laminin), and a tethered potent neurogenic differentiation factor (interferon-γ). With this approach, hydrogel formation occurs via strain-promoted, metal-free, azide-alkyne cycloaddition in an aqueous buffer...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29388455/dielectric-barrier-discharge-and-jet-type-plasma-surface-modifications-of-hybrid-polymeric-poly-%C3%AE%C2%B5-caprolactone-chitosan-scaffolds
#9
Ozan Ozkan, Hilal Turkoglu Sasmazel
In this study, dry air plasma jet and dielectric barrier discharge Ar + O2 or Ar + N2 plasma modifications and their effects on wettability, topography, functionality and biological efficiency of the hybrid polymeric poly (ε-caprolactone)/chitosan scaffolds were reported. The samples treated with Ar + O2 dielectric barrier discharge plasma (80 sccm O2 flow rate, 3-min treatment) or with dry air plasma jet (15-cm nozzle-sample distance, 13-min treatment) had the closest wettability (49.11 ± 1...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29380662/vancomycin-impregnated-electrospun-polycaprolactone-pcl-membrane-for-the-treatment-of-infected-bone-defects-an-animal-study
#10
Shijun Wei, Chao Jian, Feng Xu, Tongzhu Bao, Shenghui Lan, Gang Wu, BaiWen Qi, Zikui Bai, Aixi Yu
There is no consensus for the management of critical infected bone defects. The purpose of this study was to produce a vancomycin-impregnated electrospun polycaprolactone (PCL) membrane for the treatment of infected critical bone defects, and test it in a rabbit model. Electrospinning produced a resorbable PCL fiber membrane containing vancomycin approximately 1 mm in thickness, with a pore diameter of <10 μm. Femur defects were made in the limbs of 18 rabbits and infected with Staphylococcus aureus. The rabbits were divided into three groups according to treatment: (1) Experimental group: rabbit freeze-dried allogeneic bone graft and the vancomycin-PCL membrane...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29380661/evaluation-of-wound-healing-effect-of-alginate-films-containin-g-aloe-vera-aloe-barbadensis-miller-gel
#11
Adriana Y Koga, Airton V Pereira, Leandro C Lipinski, Marcia Rp Oliveira
A new alginate dressing with Aloe vera gel was developed and used to study its cutaneous healing effect in vivo by surgical wounds in Wistar rats. The aloe-alginate film was characterized by Fourier-transform infrared spectroscopy, mechanical properties, scanning electron microscopy, hydration rate, and calcium release. The aloe-alginate film demonstrated desirable physical and mechanical characteristics for wound dressing application. The animals were divided in three groups (n = 20): gauze bandage, alginate film, and aloe-alginate film...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29359624/blocking-of-matrix-metalloproteinases-13-responsive-peptide-in-poly-urethane-urea-for-potential-cartilage-tissue-engineering-applications
#12
Gang Wu, Huan Wang, Jiangwei Xiao, Lilu Wang, Yu Ke, Liming Fang, Chunlin Deng, Hua Liao
The matching of scaffold degradation rate with neotissue growth is required for tissue engineering applications. Timely provision of proper spaces especially for cartilage tissue engineering plays a pivotal role in chondrocyte cluster formation. In this study, poly(urethane urea) was synthesized using conventional two-stage method by extending the isocyanate group terminated prepolymers with different amounts of GPLGLWARK peptide, which responses the degrading induced by matrix metalloproteinase 13, the main proteinase for cartilage matrix degradation...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29357775/calcium-carbonate-end-capped-folate-mediated-fe3o4-msio2-core-shell-nanocarriers-as-targeted-controlled-release-drug-delivery-system
#13
Min-Chao Liu, Bing Liu, Xian-Li Chen, Hui-Chao Lin, Xiang-Yu Sun, Jia-Zheng Lu, Yan-Yu Li, Si-Qi Yan, Lu-Yong Zhang, Ping Zhao
Magnetic mesoporous silica nanospheres (MMSN) were prepared and the surface was modified with cancer cell-specific ligand folic acid. Calcium carbonate was then employed as acid-activated gatekeepers to cap the mesopores of the MMSN, namely, MMSN-FA-CaCO3. The formation of the MMSN-FA-CaCO3 was proved by several characterization techniques, viz. transmission electron microscopy, zeta potential measurement, Fourier transform infrared spectroscopy, BET surface area measurement, and UV-Vis spectroscopy. Daunomycin was successfully loaded in the MMSN-FA-CaCO3 and the system exhibited sensitive pH stimuli-responsive release characteristics under blood or tumor microenvironment...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29357774/acceleration-of-the-healing-process-of-full-thickness-wounds-using-hydrophilic-chitosan-silica-hybrid-sponge-in-a-porcine-model
#14
Ji-Ung Park, Seol-Ha Jeong, Eun-Ho Song, Juha Song, Hyoun-Ee Kim, Sukwha Kim
In this study, we evaluated the surface characterization of a novel chitosan-silica hybridized membrane and highlighted the substantial role of silica in the wound environment. The chemical coupling of chitosan and silica resulted in a more condensed network compared with pure chitosan, which was eventually able to stably maintain its framework, particularly in the wet state. In addition, we closely observed the wound-healing process along with the surface interaction between chitosan-silica and the wound site using large-surface-area wounds in a porcine model...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29338566/constructing-heparin-modified-pancreatic-decellularized-scaffold-to-improve-its-re-endothelialization
#15
Liancheng Xu, Yibing Guo, Yan Huang, Yicheng Xiong, Yang Xu, Xiaohong Li, Jingjing Lu, Lei Wang, Yao Wang, Yuhua Lu, Zhiwei Wang
Pancreas transplantation is considered as a promising therapeutic option with the potential to cure diabetes. However, efficacy of current clinical transplantation is limited by the donor organ. With regard to creating a functional pancreas-tissue equivalent for transplantation, vascularization remains a large obstacle. To enhance the angiogenic properties of pancreatic decellularized scaffold, surface modification of the vasculature was used to promote endothelialization efficiency. In this study, an endothelialized pancreatic decellularized scaffold was obtained through heparin modification under mild conditions...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29301451/dopamine-self-polymerized-along-with-hydroxyapatite-onto-the-preactivated-titanium-percutaneous-implants-surface-to-promote-human-gingival-fibroblast-behavior-and-antimicrobial-activity-for-biological-sealing
#16
Minggang Yang, Peipei Jiang, Yang Ge, Fang Lan, Xuedong Zhou, Jing He, Yao Wu
The clinical success of dental implants requires not only the optimum osseointegration but also the integration of implant surface with soft tissues to form biological sealing. In this study, alkali-heat treatment was applied to modify the pure titanium surface constructing a unique micro-and nano-structure. Then, poly(dopamine), along and with the additional incorporation of hydroxyapatite and carboxymethyl chitosan have been successfully infiltrated into the preactivated Ti surface during dopamine self-polymerization proceeding...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29298552/e-beam-sterilizable-thermoplastics-elastomers-for-healthcare-devices-mechanical-morphology-and-in-vivo-studies
#17
Ananad Bellam Balaji, Chantara Thevy Ratnam, Mohammad Khalid, Rashmi Walvekar
The effect of electron beam radiation on ethylene-propylene diene terpolymer/polypropylene blends is studied as an attempt to develop radiation sterilizable polypropylene/ethylene-propylene diene terpolymer blends suitable for medical devices. The polypropylene/ethylene-propylene diene terpolymer blends with mixing ratios of 80/20, 50/50, 20/80 were prepared in an internal mixer at 165°C and a rotor speed of 50 rpm/min followed by compression molding. The blends and the individual components were radiated using 3...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29298551/synthesis-characterization-and-property-of-biodegradable-peg-pcl-pla-terpolymers-with-miktoarm-star-and-triblock-architectures-as-drug-carriers
#18
Yixin Zhang, Song Luo, Yan Liang, Hai Zhang, Xinyu Peng, Bin He, Sai Li
A series of amphiphilic terpolymers with miktoarm star and triblock architectures of poly(ethylene glycol) (PEG), poly(ε-caprolactone) (PCL) and poly(l-lactide acid) (PLLA) or poly(DL-lactide acid) (PDLLA) terpolymers were synthesized as carriers for drug delivery. The architecture, molecular weight and crystallization behavior of the terpolymers were characterized. Anticancer drug doxorubicin was encapsulated in the micelles to investigate their drug loading properties. The miktoarm star terpolymers exhibited stronger crystallization capability, smaller size and better stability than that of triblock polymeric micelle, owing to the lower CMC values of miktoarm star polymeric micelle...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29295656/core-shell-poly-lactide-co-%C3%AE%C2%B5-caprolactone-gelatin-fiber-scaffolds-as-ph-sensitive-drug-delivery-systems
#19
Qingqing Sang, Heyu Li, Gareth Williams, Huanling Wu, Li-Min Zhu
Dual-drug-loaded pH-responsive fiber scaffolds were successfully prepared by coaxial electrospinning. These were designed with the aim of being sutured into the resection site after tumor removal, to aid recovery and prevent cancer recurrence. The shell was made up of a mixture of gelatin and sodium bicarbonate (added to provide pH-sensitivity), and was loaded with the anti-inflammatory drug ciprofloxacin; the core comprised poly(lactide-co-ε-caprolactone) with the chemotherapeutic doxorubicin hydrochloride...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29113568/combined-delivery-of-bone-morphogenetic-protein-2-and-insulin-like-growth-factor-1-from-nano-poly-%C3%AE-glutamic-acid-%C3%AE-tricalcium-phosphate-based-calcium-phosphate-cement-and-its-effect-on-bone-regeneration-in%C3%A2-vitro
#20
Xiulin Shu, Jin Feng, Jing Feng, Xiaomo Huang, Liangqiu Li, Qingshan Shi
In this study, nano-doped calcium phosphate cement delivery systems (poly (γ-glutamic acid)/β-tricalcium phosphate/calcium phosphate ceramics and nano (γ-glutamic acid)/β-tricalcium phosphate/calcium phosphate ceramic) were fabricated, and low doses (10 µg/g) of two growth factors, insulin-like growth factor-1 and bone morphogenetic protein-2, were encapsulated then sequentially released. We characterized the delivery systems using Fourier transform infrared spectroscopy and X-ray diffraction and measured washout resistance and compressive strength, and thus optimized the most appropriate proportioning of delivery systems for the two growth factors...
November 2017: Journal of Biomaterials Applications
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