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Journal of Biomaterials Applications | Page 2

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https://read.qxmd.com/read/31014208/applications-of-starch-and-its-derivatives-in-bioceramics
#21
Joanna Mastalska-Popławska, Marek Sikora, Piotr Izak, Zuzanna Góral
The recent developments in the area of using starch in ceramics cover such fields like ceramic powders synthesis, where starch can be a polymerizing agent in sol-gel method or substrate for carbon spheres in hydrothermal synthesis, traditional ceramics manufacturing in which starch and its derivatives are being used as binders, rheological modifiers or even strengthening agents, as well as porous ceramics and bioceramics where starch plays mostly a role of pore forming agent. Due to the low dimensional changes occurring during the consolidation process, starch can help to control porosity of the bioceramics, which leads to better mechanical properties of the final product...
April 23, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/31006317/a-novel-3d-printed-silk-fibroin-based-scaffold-facilitates-tracheal-epithelium-proliferation-in-vitro
#22
Nongping Zhong, Tao Dong, Zhongchun Chen, Yongwei Guo, Zhengzhong Shao, Xia Zhao
The functional epithelial regeneration is important for repairing tracheal defects. However, the potential of 3D-printed SF-based scaffolds for tracheal epithelial regeneration is still unknown. In this study, we developed a novel silk fibroin-based scaffold prepared by 3D printing of silk fibroin/hydroxypropyl methyl cellulose (SF/HPMC) thixotropic hydrogel and evaluated the tracheal epithelium proliferation on this scaffold in vitro. Combined with the freeze-dried technology, the 3D-printed SF/HPMC scaffolds had porous structures in the printed bars...
April 20, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/31006316/importance-of-the-free-amine-groups-in-acellular-scaffold-during-tissue-repairing-or-regeneration-process
#23
Tengfei Pan, Jian Tao, Qingqiang Meng, Wei Zhao, Bingkui Song, Shuting Qi
In addition to serve as a physical scaffold, acellular scaffold should be involved in tissue repair processes such as hemostasis, inflammation, proliferation, and remodeling/regeneration as a bioactive material. The biological activities of acellular scaffold related to free amine groups may have a great influence on tissue repairing process after in situ implantation. In order to investigate the role of free amine groups in acellular scaffold on tissue repairing/regeneration process, the amine-blocked acellular scaffolds and amine-unblocked acellular scaffolds were prepared by using bovine pericardia...
April 20, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30991878/sol-gel-preparation-of-anti-bacterial-and-bioactive-glass-ceramics
#24
Beijing Xue, Wenhao Wang, Litong Guo, Zhongxuan Zhang, Jiaxi Meng, Xueyu Tao, Xuanru Ren, Zhangsheng Liu, Yinghuai Qiang
Glass-ceramics were synthesized through the sol-gel method. The Thermogravimetry & Differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), BET, Scanning electron microscope (SEM), bioactivity and turbidometric tests were used to characterize the properties of the glass-ceramics. The TG-DSC results showed that the nitrates could be decomposed completely when the bioactive glass xerogel precursor was heat treated at 750°C. The synthesized glass-ceramic powders had an average particle size of about 3 μm to 20 μm with nanopores on the surface...
April 16, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30987507/targeted-pharmacokinetics-of-polymeric-micelles-modified-with-glycyrrhetinic-acid-and-hydrazone-bond-in-h22-tumor-bearing-mice
#25
Yan Zheng, Shudan Shi, Yaru Liu, Yandan Zhao, Yuqi Sun
Liver cancer is one of the most common malignant tumors. Chemotherapy drugs have been widely used in the anti-hepatoma research. However, low targeting efficiency and serious adverse reaction are their main drawbacks. Liver tumor was proved to have a slightly acidic microenvironment (pH 4.5-5.5) and many glycyrrhetinic-acid-specific binding sites. Therefore, in the present study, the glycyrrhetinic acid- and hydrazone bond-modified micelles were designed. mPEG-HZ-PLA and GA-PEG-PLA copolymer were synthesized to prepare glycyrrhetinic-acid-modified pH-sensitive polymeric micelles (GA-PEG-HZ-PLA)...
April 16, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30987506/evaluation-of-comparative-soft-tissue-response-to-bone-void-fillers-with-antibiotics-in-a-rabbit-intramuscular-model
#26
Rema A Oliver, Vedran Lovric, Chris Christou, William R Walsh
Management of osseous and soft tissue dead space can be a significant challenge in the clinical setting. Calcium sulphate and calcium phosphate-based biomaterials are increasingly being used as alternatives to PMMA for local release of antibiotics, in particular to fill dead space following surgical debridement. This study aims to observe the in-vivo absorption characteristics and tissue response of three commercially available calcium sulphate-based materials combined with gentamicin in an established soft tissue rabbit model...
April 16, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30971178/simultaneous-delivery-of-gene-and-chemotherapeutics-via-copolymeric-micellar-nanoparticles-to-overcome-multiple-drug-resistance-to-promote-synergistic-tumor-suppression
#27
Jianguo Gao, Lingxiao Chen, Ruogu Qi, Zhihua Zhou, Zaian Deng, Jue Shi, Tao Qin, Shengzhe Zhao, Yuna Qian, Jianliang Shen
Combination of chemotherapy and small interfering RNA (siRNA)-based nanotherapeutics could cooperatively and effectively suppress multiple drug resistance in cancer development. Particularly, nano-delivery systems that efficiently encapsulate two or more therapeutic payloads to the tumor-targeted sites have been proven significantly. Here, we prepared a micellar nanoparticle formed by monomethoxy poly (ethylene glycol)-block-poly(ε-caprolactone)-block-poly(L-lysine)/cholesterol (mPEG-b-PCL-b-PLL/Chol, further abbr...
April 10, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30971177/in-vivo-transplantation-of-stem-cells-with-a-genipin-linked-scaffold-for-tracheal-construction
#28
Yi Zhong, Wenlong Yang, Zi Yin Pan, Shu Pan, Si Quan Zhang, Zhi Hao Wang, Sijia Gu, Hongcan Shi
To establish the procedures of genipin-linked scaffold for in situ tracheal reconstruction in a rabbit model, and to demonstrate whether stem cells can be further differentiated in the bioreactor in vivo. It will further provide an experimental and theoretical foundation for clinical application. Previously, in vitro evaluation proved the detergent-enzymatic method effectively removed stromal epithelial cells, and the number of nuclei was reduced significantly ( p < 0.05). The content of type II collagen was not statistically reduced ( p > 0...
April 10, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30961432/three-dimensional-graphene-foam-as-a-conductive-scaffold-for-cardiac-tissue-engineering
#29
Sajad Bahrami, Nafiseh Baheiraei, Majid Mohseni, Mehdi Razavi, Atefeh Ghaderi, Behnam Azizi, Navid Rabiee, Mahdi Karimi
Myocardial infarction is one of the major causes of mortality throughout the world. Cardiac scaffolds are tissue-engineered structures for the treatment of myocardial infarction and are employed for tissue support and cell delivery to the injured region. In this study, we fabricated nanostructured graphene foams as porous and biocompatible cardiac tissue-engineering scaffolds. Three-dimensional graphene foam and two-dimensional graphene were fabricated using chemical vapor deposition. We showed that the nickel etching had no effect on the structural appearance of the three-dimensional graphene foam...
April 8, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30961431/the-role-of-orthosilicic-acid-induced-autophagy-on-promoting-differentiation-and-mineralization-of-osteoblastic-cells
#30
Hai Chi, Meng Kong, Guangjun Jiao, Wenliang Wu, Hongming Zhou, Lu Chen, Yini Qiao, Hongliang Wang, Wenzheng Ma, Yunzhen Chen
Silicon, an element, has been reported to possess various osteogenic biological functions. However, the precise cellular action mechanism of silicon in osteogenesis is elusive. Here, we examine whether autophagy is associated with the osteogenic differentiation and mineralization of preosteoblasts stimulated by orthosilicic acid (unique soluble form of silicon). The autophagy induced by silicon was detected via autophagy-related protein expression. The correlation between orthosilicic acid-induced autophagy and the osteogenic process was verified by the autophagy inhibitor 3-methyladenine...
April 8, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30952195/plga-nanoparticle-based-docetaxel-ly294002-drug-delivery-system-enhances-antitumor-activities-against-gastric-cancer
#31
Juan Cai, Keyang Qian, Xueliang Zuo, Wuheng Yue, Yinzhu Bian, Ju Yang, Jia Wei, Wenying Zhao, Hanqing Qian, Baorui Liu
Docetaxel (TXT) is acknowledged as one of the most important chemotherapy agents for gastric cancer (GC). PI3K/AKT signaling is frequently activated in GC, and its inhibitor LY294002 exerts potent antitumor effects. However, the hydrophobicity of TXT and the poor solubility and low bioavailability of LY294002 limit their clinical application. To overcome these shortcomings, we developed poly(lactic acid/glycolic) (PLGA) nanoparticles loaded with TXT and LY294002. PLGA facilitated the accumulation of TXT and LY294002 at the tumor sites...
April 5, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30952194/mechanical-and-chemical-characterisation-of-bioresorbable-polymeric-stent-over-two-year-in-vitro-degradation
#32
Raasti Naseem, Liguo Zhao, Vadim Silberschmidt, Yang Liu, Ollie Scaife, Helen Willcock, Senthil Eswaran, Syed Hossainy
Polymeric stent is a temporary cardiovascular scaffold, made of biodegradable poly (l-lactic) acid, to treat coronary artery stenosis, with expected resorption by the human body over two to three years. In this paper, the mechanical properties of a polymeric stent over two-year in vitro degradation were studied and characterised using atomic force microscopy and nanoindentation techniques, complemented with analyses of weight loss, gel permeation chromatography and differential scanning calorimetry. Atomic force microscopy assessed stent degradation at the surface, whilst nanoindentation was able to investigate the property at a greater depth into the material...
April 5, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30935278/silver-triethanolamine-loaded-pvb-co-films-for-a-potential-liquid-bandage-application
#33
Fengzhen Zhou, Wenjing Wang, Huiling Guo
Many studies have reported that silver has excellent antibacterial properties. However, silver ions can easily react with oxygen to form Ag2 O, thus leading to a color change and a reduction in its anti-microbial characteristics. In this study, silver triethanolamine- (ST) loaded PVB/CO solution was prepared as a potential candidate liquid bandage. PVB/CO/ST retained high transparency after exposure to light for 12 months, which allowed convenient inspection of the wound bed without removal of the dressing...
April 1, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30885033/silk-fibroin-coating-through-edc-nhs-crosslink-is-an-effective-method-to-promote-graft-remodeling-of-a-polyethylene-terephthalate-artificial-ligament
#34
Jiangyu Cai, Li Zhang, Jun Chen, Shiyi Chen
Anterior cruciate ligament reconstruction using polyethylene terephthalate artificial ligaments is one of the research hotspots in sports medicine but it is still challenging to achieve biological healing. The purpose of this study was to modify polyethylene terephthalate ligament with silk fibroin through ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC)/N-hydroxysuccinimide (NHS) crosslink and to investigate the performance of graft remodeling in vitro and in vivo. After silk fibroin coating, changes in the surface properties of ligament were characterized by scanning electron microscopy, attenuated total reflectance-Fourier transform infrared spectroscopy and water contact angle measurements...
March 18, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30880549/clopidogrel-eluting-electrospun-polyurethane-polyethylene-glycol-thromboresistant-hemocompatible-nanofibrous-scaffolds
#35
Ajinkya A Shitole, Prabhanjan S Giram, Piyush W Raut, Priyanka P Rade, Anand P Khandwekar, Neeti Sharma, Baijayantimala Garnaik
Biomaterials used as blood-contacting material must be hemocompatible and exhibit lower thrombotic potential while maintaining hemostasis and angiogenesis. With the aim of developing thromboresistant, hemocompatible nanofibrous scaffolds, polyurethane/polyethylene glycol scaffolds incorporated with 1, 5, and 10 wt% Clopidogrel were fabricated and evaluated for their physiochemical properties, biocompatibility, hemocompatibility, and antithrombotic potential. The results of physicochemical characterization revealed the fabrication of nanometer-sized scaffolds with smooth surfaces...
March 18, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30880566/doxorubicin-loaded-fe-3-o-4-zif-8-nano-composites-for-hepatocellular-carcinoma-therapy
#36
Chong Cheng, Cheng Li, Xulong Zhu, Wei Han, Jianhui Li, Yi Lv
Hepatocellular carcinoma (HCC) is one of the most common and malignant cancers and has no effective therapeutic approaches. Chemotherapeutic drug doxorubicin (DOX) is widely used for HCC therapy, but its application is limited by the clinical toxicity. In the present study, an Fe3 O4 -ZIF-8 magnetic nano-composite was fabricated and used for DOX delivery for HCC therapy. The morphology, structure and property of Fe3 O4 -ZIF-8 nano-composites were evaluated by scanning electron microscopy, transmission electron microscopy and N2 adsorption-desorption isotherms studies...
March 16, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30880565/biodegradable-hybrid-mesoporous-silica-nanoparticles-for-gene-chemo-synergetic-therapy-of-breast-cancer
#37
Beibei Zhang, Qi Liu, Mengyuan Liu, Peipei Shi, Lichong Zhu, Lu Zhang, Ruifang Li
Mesoporous silica nanoparticles have been extensively explored in anticancer nanomedicine due to their excellent biodegradability, which is one important focus in their further clinical translations. However, the traditional design concepts based on the functional modification with active groups cannot significantly improve the controlled drug release efficiency and anticancer effect. Herein, a molecularly organic-inorganic hybrid mesoporous silica nanoparticle (HMSN) nanocarrier coated with hyaluronic acid (HA) and polyethyleneimine (PEI) was constructed for the gene/chemo-synergetic therapy of breast cancer...
March 16, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30880564/anti-inflammatory-and-antimicrobial-activity-of-bioactive-hydroxyapatite-silver-nanocomposites
#38
Juan J Martínez-Sanmiguel, Diana G Zarate-Triviño, Rene Hernandez-Delgadillo, Astrid L Giraldo-Betancur, Nayely Pineda-Aguilar, Sergio A Galindo-Rodríguez, Moisés A Franco-Molina, Sara P Hernández-Martínez, Cristina Rodríguez-Padilla
Biomaterials are often used in orthopedic surgery like cavity fillings. However, related complications often require long-term systemic antibiotics, device removal, and extended rehabilitation. Hydroxyapatite/silver (HA/Ag) composites have been proposed as implantation biomaterials owing to the osteogenic properties of hydroxyapatite and to the antimicrobial efficiency of silver. Nevertheless, higher silver concentrations induce cytotoxic effects. The aim of this study was to synthesize and characterize HA/Ag nanocomposites that will allow us to use lower concentrations of silver nanoparticles with better antimicrobial efficiency and anti-inflammatory properties...
March 16, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30862226/in-vitro-and-in-vivo-hemocompatibility-assessment-of-ultrathin-sulfobetaine-polymer-coatings-for-silicon-based-implants
#39
Zohora Iqbal, Steven Kim, Jarrett Moyer, Willieford Moses, Emily Abada, Nathan Wright, Eun Jung Kim, Jaehyun Park, William H Fissell, Shuvo Roy
Highly uniform silicon nanopore membranes were developed for applications in implantable bioartificial organs. A robust, readily scalable, non-fouling surface coating is required to enhance silicon nanopore membrane hemocompatibility. However, the coating must be ultrathin to keep the nanopores from occluding. Recently, zwitterionic brush polymers have demonstrated significantly lower fouling under biological conditions. In this study, we explore ultrathin zwitterionic poly(sulfobetaine methacrylate) (pSBMA) surface coating at sub-5 nm thickness...
March 12, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30854910/degradable-magnesium-based-alloys-for-biomedical-applications-the-role-of-critical-alloying-elements
#40
Yang Chen, Jinhe Dou, Huijun Yu, Chuanzhong Chen
Magnesium-based alloys exhibit biodegradable, biocompatible and excellent mechanical properties which enable them to serve as ideal candidate biomedical materials. In particular, their biodegradable ability helps patients to avoid a second surgery. The corrosion rate, however, is too rapid to sustain the healing process. Alloying is an effective method to slow down the corrosion rate. However, currently magnesium alloys used as biomaterials are mostly commercial alloys without considering cytotoxicity from the perspective of biosafety...
March 9, 2019: Journal of Biomaterials Applications
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