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Journal of Biomedical Materials Research. Part B, Applied Biomaterials

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https://www.readbyqxmd.com/read/28926194/inverse-response-of-osteoblasts-and-fibroblasts-to-growth-on-carbon-deposited-titanium-surfaces
#1
Chie Yoshihara, Takeshi Ueno, Peng Chen, Yusuke Tsutsumi, Takao Hanawa, Noriyuki Wakabayashi
Titanium implant surfaces may serve as attachment substrates for various cell types. Since carbon adsorption on titanium is inevitable, this study examined the negative/positive biological reaction of osteoblasts and fibroblasts on carbon-deposited titanium surfaces. Osteogenic MC3T3-E1 and fibrogenic NIH/3T3 cells were separately cultured on titanium disks on which carbon deposition was experimentally regulated to achieve titanium/carbon ratios of 6.5, 0.02, 0.005, and 0. The initial attachment of cells demonstrated that the quantity of attached osteoblasts on Ti/C (0...
September 19, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28926192/testing-of-a-bioactive-moldable-bone-graft-substitute-in-an-infected-critically-sized-segmental-defect-model
#2
Matt E Brown, Yuan Zou, Rebecca Peyyala, Sarandeep S Huja, Larry L Cunningham, Todd A Milbrandt, Thomas D Dziubla, David A Puleo
Large infected bone defects, often resulting from high energy traumas, are difficult to treat due to their variability in complexity and location. Standard treatment for infected bone defects begins with a protocol that includes a series of debridements in conjunction with an extended course of systemic antibiotics. Only after the infection has been eliminated will repair of the defect commence, typically with implantation of autologous bone. To address some of the shortcomings of the standard treatment methods, such as serial procedures, limited grafting material, and the need for a second surgical site for autologous bone, a sequential, dual drug-releasing, moldable, calcium sulfate-based bone graft substitute was developed previously...
September 19, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28922558/biomechanical-properties-and-healing-effects-of-chitin-patch-in-a-rat-full-thickness-abdominal-wall-defect-model
#3
Jing Qiao, Zhiwen Jiang, Xuyue Liang, Yan Yang, Wanshun Liu, Baoqin Han
Hernia repair is usually accompanied with the implantation of a synthetic mesh, which frequently results in a foreign body response and serious complications. In the present study, a novel biodegradable chitin-based hernia patch was prepared and characterized. Biomechanical properties and biodegradability of the chitin patch were quantified in vitro and in vivo. In repair of the rat abdominal wall full-thickness defect model, the chitin patch induced more abundant new blood vessels with milder tissue inflammation and fibrosis compared with polypropylene mesh...
September 18, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28922555/laser-micro-ablation-of-fibrocartilage-tissue-effects-of-tissue-processing-on-porosity-modification-and-mechanics
#4
A M Matuska, P S McFetridge
The temporomandibular joint disk (TMJd) is an extremely dense and avascular fibrocartilaginous extracellular matrix (ECM) resulting in a limited regenerative capacity. The use of decellularized TMJd as a biocompatible scaffold to guide tissue regeneration is restricted by innate subcellular porosity of the ECM that hinders cellular infiltration and regenerative events. Incorporation of an artificial microporosity through laser micro-ablation (LMA) can alleviate these cell and diffusion based limitations. In this study, LMA was performed either before or after decellularization to assess to effect of surfactant treatment on porosity modification as well as the resultant mechanical and physical scaffold properties...
September 18, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28922546/single-dose-local-administration-of-teriparatide-with-a-octacalcium-phosphate-collagen-composite-enhances-bone-regeneration-in-a-rodent-critical-sized-calvarial-defect
#5
Fumihiko Kajii, Atsushi Iwai, Hidenori Tanaka, Keiko Matsui, Tadashi Kawai, Shinji Kamakura
Octacalcium phosphate and collagen composite (OCP/Col) achieves stable bone regeneration without cell transplantation in preclinical studies. Recently, a sponsor-initiated clinical trial was conducted to commercialize the material. The present study investigated bone regeneration by OCP/Col with the single local administration of teriparatide (parathyroid hormone 1-34; TPTD). OCP/Col was prepared by mixing sieved granules of OCP and atelocollagen for medical use and a disk was molded. After the creation of a rodent critical-sized calvarial defect, OCP/Col or OCP/Col with dripped TPTD solution (1...
September 18, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28922543/in-vitro-and-in-vivo-degradation-of-microfiber-bioresorbable-coronary-scaffold
#6
Chi-Hung Huang, Sheng-Yang Lee, Sonida Horng, Louis-Georges Guy, Ting-Bin Yu
The degradation of Mirage Bioresorbable Microfiber Scaffold was evaluated in vitro and in vivo. The degradation in polymer molecular weight (MW), strut morphology, and integrity was accessed using gel permeation chromatography (GPC), X-ray micro-computed tomography (micro-CT) evaluation. To simulate the physiological degradation in vitro, scaffolds were deployed in silicone mock vessels connected to a peristaltic pumping system, which pumps 37°C phosphate-buffered saline (PBS, pH 7.4) at a constant rate. At various time points (30D, 60D, 90D, 180D, 270D, and 360D), the MW of microfibers decreased to 57...
September 18, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28914997/synergistic-effect-of-l-ascorbic-acid-and-hyaluronic-acid-on-the-expressions-of-matrix-metalloproteinase-3-and-9-in-human-chondrocytes
#7
Teng-Le Huang, Che-Hua Yang, Goichi Yanai, Jo-Yu Liao, Shoichiro Sumi, Kai-Chiang Yang
Proinflammatory cytokines and reactive oxygen species (ROS) are known to be involved in the initiation and progression of osteoarthritis (OA). New evidence clarifying the correlation between ROS and inflammation has indicated that oxidative stress can up-regulate inflammatory cytokines. l-Ascorbic acid (AA), an antioxidant, has been shown to have anti-inflammatory effects and improve matrix deposition in chondrocytes. The purpose of this study was to examine the effects of hyaluronic acid (HA; 100 μg/mL) supplemented with AA (50 μg/mL) on human normal and interleukin-1 beta-stimulated (IL-1β, 10 ng/mL) chondrocytes...
September 15, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28914993/hyaluronan-incorporation-into-model-contact-lens-hydrogels-as-a-built-in-lubricant-effect-of-hydrogel-composition-and-proteoglycan-4-as-a-lubricant-in-solution
#8
Michael Samsom, Myrto Korogiannaki, Lakshman N Subbaraman, Heather Sheardown, Tannin A Schmidt
Contact lens friction significantly correlates with subjective comfort. Hyaluronan (HA) and proteoglycan 4 (PRG4) are natural boundary lubricants present in the body. The objective of this study was to assess the effect of crosslinked HA into the bulk of model contact lens materials pHEMA, pHEMA/TRIS, and DMAA/TRIS on surface wettability, protein sorption, and boundary lubricating properties at a material-cornea biointerface, both alone and synergistically with PRG4 in solution. Surface wettability was assessed by water contact angle measurement, protein sorption by lysozyme sorption assay, and boundary lubricating properties using an in vitro friction test method...
September 15, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28914992/an-effective-thermal-therapy-against-cancer-using-an-e-jet-3d-printing-method-to-prepare-implantable-magnetocaloric-mats
#9
Yikun Yang, Chunyi Tong, Juchang Zhong, Ruiying Huang, Weihong Tan, Zhikai Tan
Magnetic hyperthermia has been rapidly developed as a potential cancer treatment in recent years. Artificially induced hyperthermia close to a tumor can raise the temperature to 45°C causing tumor cell death. Herein, we introduce a novel method for rapid preparation of anti-cancer magnetocaloric PCL/Fe3 O4 mats capable of high-performance hyperthermia using E-jet 3D printing technology. Our 3D printed mats not only maintained the heating efficiency of traditional techniques for magnetic hyperthermia but also prolonged the effective therapy in vivo...
September 15, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28902456/safety-and-efficacy-of-hydroxyapatite-scaffold-in-the-prevention-of-jaw-osteonecrosis-in-vivo
#10
Adriana Duarte de Almeida, Fernanda Gomes Leite, Marco Vinícius Chaud, Márcia de Araújo Rebelo, Liliane Cristine Ferreira de Souza Borges, Fabia Judice Marques Viroel, Alessandre Hataka, Denise Grotto
Two scaffolds of chitosan/sodium alginate/hydroxyapatite (Ch/NaAlg/Hap) 1:1:0.2 and 1:1:0.6 were evaluated in the prevention of bisphosphonate-induced jaw osteonecrosis. Two groups of rats (n = 24, according to the euthanasia time: 15 or 30 days after the last Zoledronic acid (ZA) administration) were subdivided in four subgroups (n = 6): I - Control (saline + teeth extraction); II - ZA 0.6 mg/kg + teeth extraction; III - ZA + teeth extraction + scaffold 1:1:0.2; IV - ZA + teeth extraction + scaffold 1:1:0...
September 13, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28901710/reduced-urothelial-regeneration-in-rat-bladders-augmented-with-permeable-porcine-small-intestinal-submucosa-assessed-by-magnetic-resonance-imaging
#11
Qing Yang, Ding Xia, Rheal A Towner, Nataliya Smith, Debra Saunders, Kar-Ming Fung, Christopher E Aston, Beverley Greenwood-Van Meerveld, Robert E Hurst, Sundararajan V Madihally, Bradley P Kropp, Hsueh-Kung Lin
Augmentation enterocystoplasty remains the gold standard surgical bladder reconstruction procedure to increase the capacity and compliance of dysfunctional bladders. Since the use of the patient's intestine has severe risks of complications, alternative biodegradable matrices have been explored. Porcine small intestinal submucosa (SIS) has gained immense interests in bladder reconstruction due to its favorable properties. However, trials have shown inconsistent regeneration with SIS, attributed to the heterogeneity in microstructures and mechanical properties...
September 13, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28901689/prevascularization-of-3d-printed-bone-scaffolds-by-bioactive-hydrogels-and-cell-co-culture
#12
Mitchell A Kuss, Shaohua Wu, Ying Wang, Jason B Untrauer, Wenlong Li, Jung Yul Lim, Bin Duan
Vascularization is a fundamental prerequisite for large bone construct development and remains one of the main challenges of bone tissue engineering. Our current study presents the combination of 3D printing technique with a hydrogel-based prevascularization strategy to generate prevascularized bone constructs. Human adipose derived mesenchymal stem cells (ADMSC) and human umbilical vein endothelial cells (HUVEC) were encapsulated within our bioactive hydrogels, and the effects of culture conditions on in vitro vascularization were determined...
September 13, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28901688/poly-glycerol-sebacate-combined-with-chondroitinase-abc-promotes-spinal-cord-repair-in-rats
#13
Qi Pan, Yan Guo, Fanyong Kong
This study was to investigate the feasibility of PGS combined with ChABC for repairing the transection of spinal cords (TSC) in rats. A thoracic 10 (T10) TSC model of rats was employed. The effects of PGS with ChABC on the morphology and histological structure of the spinal cords, Basso, Beattie, Bresnahan (BBB) scores, and the expression of GAP-43 and NF-200 were comparatively studied. The BBB scores indicated that all rats with TSC were paralyzed immediately after surgery and then recovered hind limb movement gradually, but did not fully recover until the end of week 12...
September 13, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28901680/evaluation-of-polyacrylonitrile-electrospun-nano-fibrous-mats-as-leukocyte-removal-filter-media
#14
Raha Pourbaghi, Mohammad Zarrebini, Dariush Semnani, Abbasali Pourazar, Nahid Akbari, Reihaneh Shamsfar
Removal of leukocytes from blood products is the most effective means for elimination of undesirable side effects and prevention of possible reactions in recipients. Micro-fibrous mats are currently used for removal of leukocytes from blood. In this study, samples of electrospun nano-fibrous mats were produced. The performance of the produced electrospun nano-fibrous mats as means of leukocytes removal from fresh whole blood was both evaluated and compared with that of commercially available micro-fibrous mats...
September 13, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28888079/bioabsorbable-nerve-conduits-coated-with-induced-pluripotent-stem-cell-derived-neurospheres-enhance-axonal-regeneration-in-sciatic-nerve-defects-in-aged-mice
#15
Takuya Yokoi, Takuya Uemura, Kiyohito Takamatsu, Kosuke Shintani, Ema Onode, Mitsuhiro Okada, Noriaki Hidaka, Hiroaki Nakamura
Aging influences peripheral nerve regeneration. Nevertheless, most basic research of bioabsorbable nerve conduits including commercial products have been performed in very young animals. Results from these studies may not provide information about axonal regeneration in aged tissue, because young nerve tissue holds sufficient endogenous potential for axonal regeneration. The clinical target age for nerve conduit application is most likely going to increase with a rapidly growing elderly population. In the present study, we examined axonal regeneration after sciatic nerve defects in aged and young mice...
September 9, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28888071/the-effect-of-ventricular-assist-device-associated-biomaterials-on-human-blood-leukocytes
#16
Gemma Radley, Ina Laura Pieper, Catherine A Thornton
Ventricular assist devices (VADs) are an effective bridging or destination therapy for patients with advanced stage heart failure. These devices remain susceptible to adverse events including infection, bleeding, and thrombus; events linked to the foreign body response. Therefore, the biocompatibility of all biomaterials used is crucial to the success of medical devices. Biomaterials common in VADs-DLC: diamond-like carbon coated stainless steel; Sap: single-crystal sapphire; SiN: silicon nitride; Ti: titanium alloy; and ZTA: zirconia-toughened alumina-were tested for their biocompatibility through incubation with whole human blood for 2 h with mild agitation...
September 9, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28888067/injectable-thermosensitive-alginate-%C3%AE-tricalcium-phosphate-aspirin-hydrogels-for-bone-augmentation
#17
Xiaoqian Fang, Lei Lei, Ting Jiang, Ying Chen, Yunqing Kang
In this study, an injectable and thermo-sensitive alginate/β-tricalcium phosphate hydrogel (TSAH/β-TCP) was prepared for aspirin release to a bone defect. Aspirin was dissolved into a mixture of poly(N-isopropylacrylamide) (PNIPAAm), an aminated alginate-g-PNIPAAm co-polymer, and β-TCP powders. Scanning electron microscopy showed that TSAH/β-TCP had an interconnected porous microstructure with a porosity of 86.78%. The cross-linked hydrogel released approximately 40% of the aspirin in the first 3 days and then slowly released the remainder...
September 9, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28884951/evaluation-of-chemical-stability-of-polymers-of-xience-everolimus-eluting-coronary-stents-in-vivo-by-pyrolysis-gas-chromatography-mass-spectrometry
#18
Marika Kamberi, David Pinson, Stephen Pacetti, Laura E L Perkins, Syed Hossainy, Hiroyoshi Mori, Richard J Rapoza, Frank Kolodgie, Renu Virmani
The polymers poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and poly(n-butyl methacrylate) (PBMA) are employed in manufacturing the XIENCE family of coronary stents. PBMA serves as a primer and adheres to both the stent and the drug coating. PVDF-HFP is employed in the drug matrix layer to hold the drug everolimus on the stent and control its release. Chemical stability of the polymers of XIENCE stents in the in-vivo environment was evaluated by pyrolysis-gas chromatography with mass spectrometry (Py-GC/MS) detection...
September 7, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28858405/development-of-high-strength-siloxane-poly-urethane-urea-elastomers-based-on-linked-macrodiols-for-heart-valve-application
#19
Loshini S Dandeniyage, Pathiraja A Gunatillake, Raju Adhikari, Mark Bown, Robert Shanks, Benu Adhikari
Mixed macrodiol based siloxane poly(urethane-urea)s (SiPUU) having number average molecular weights in the range 87-129 kDa/mol were synthesized to give elastomers with high tensile and tear strengths required to fabricate artificial heart valves. Polar functional groups were introduced into the soft segment to improve the poor segmental compatibility of siloxane polyurethanes. This was achieved by linking α,ω-bis(6-hydroxyethoxypropyl) poly(dimethylsiloxane) (PDMS) or poly(hexamethylene oxide) (PHMO) macrodiols with either 4,4'-methylenediphenyl diisocyanate (MDI), hexamethylene diisocyanate (HDI) or isophorone diisocyanate (IPDI) prior to polyurethane synthesis...
August 31, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28851086/sutureless-nerve-repair-with-ecm-bioscaffolds-and-laser-activated-chitosan-adhesive
#20
Neill J Turner, Scott A Johnson, Leslie J R Foster, Stephen F Badylak
The outcome of peripheral nerve repair following transection is influenced by a number of factors but almost all approaches require anastomosis of the nerve using technically demanding microsurgical procedures. However, the use of sutures presents a number of unavoidable challenges including additional nerve trauma, stimulation of an inflammatory response, and endoneural fibrosis. The objective of the present study was to determine the efficacy of a sutureless approach to nerve repair. A rat sciatic nerve transection model was used with a laser-activated, chitosan-based adhesive (SurgiLux), combined with different forms of extracellular matrix (ECM), known to promote Schwann cell proliferation and nerve growth both in peripheral nerve applications...
August 29, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
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