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Journal of Biomaterials Science. Polymer Edition

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https://www.readbyqxmd.com/read/28051909/in-vitro-heterogeneous-degradation-of-alginate-and-its-validation-of-different-molecular-weight-on-blood-bio-compatibility
#1
Mengxue Xu, Chao Feng, Juan Wang, Xuqian Lang, Guixue Xia, Xiaoping Yu, Qiuxia Ji, Xiaojie Cheng, Ming Kong, Ya Liu, Xiguang Chen
In the present work, sodium alginate (ALG) was degraded by heterogeneous phase acid degradation. The molecular weight distribution of ALG after degradation was close to homogenization. Then the blood bio-compatibility of ALG with different molecular weights (ALG-0h 50,075, ALG-0.5h 20,680, ALG-2h 13,170 and ALG-96h 1170 kDa) was evaluated in vitro and vivo. The human umbilical vein endothelial cells were used to assess the cytotoxicity of ALGs, ALG-0.5h and ALG-2h exhibited greater increment in percentage of cell viability comparing with ALG-0h and ALG-96h...
January 18, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28081674/in-vivo-lifetime-and-anti-cancer-efficacy-of-doxorubicin-loaded-nanogels-composed-of-cinnamoyl-poly-%C3%AE-cyclodextrin-and-cinnamoyl-pluronic-f127
#2
Dong Youl Yoon, Jin-Chul Kim
Nanogel composed of rhodamine B isothiocyanate-labeled cinnamoyl polymeric β cyclodextrin and cinnamoyl Pluronic F127 was prepared by taking advantage of their self-assembling property in aqueous phase. The in vivo lifetime of the nanogel in the blood circulation system of hairless mouse was determined by fluorescence imaging method using rhodamine B isothiocyanate as a fluorescence probe, and it was more than 192 h. The in vivo clearance of doxorubicin loaded in the nanogel was observed by the same fluorescence imaging method...
January 13, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28081670/oxidation-and-degradation-of-polypropylene-transvaginal-mesh
#3
Anne D Talley, Bridget R Rogers, Vladimir Iakovlev, Russell F Dunn, Scott A Guelcher
Polypropylene (PP) transvaginal mesh (TVM) repair for stress urinary incontinence (SUI) has shown promising short-term objective cure rates. However, life-altering complications have been associated with the placement of PP mesh for SUI repair. PP degradation as a result of the foreign body reaction (FBR) has been proposed as a contributing factor to mesh complications. We hypothesized that PP oxidizes under in vitro conditions simulating the FBR, resulting in degradation of the PP. Three PP mid-urethral slings from two commercial manufacturers were evaluated...
January 13, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28077032/iodine-responsive-poly-hema-pvp-hydrogel-for-self-regulating-burst-free-extended-release
#4
Jinku Xu, Peili Zhao, Yongchun Zhang
Swollen hydrogels with extended iodine release kinetics is highly desirable for burn and scald treatment. In this paper semi-interpenetrating poly(HEMA-PVP) hydrogels were prepared by radical polymerization followed by thermo-treatment to crosslink its PVP component. Incorporation of PVP component endows the hydrogels responsive to loaded iodine undergoing a reversible shrunken/swollen volume transition. This resulted in a self-regulating iodine release model, in which shrunken hydrogel at high iodine loading decreased drug diffusion thereby reducing burst release,, and then gradually swollen hydrogel as drug release ensures rapid release of dissociated drug from strong affinity sites on hydrogel backbone, achieving a burst-free extended release...
January 12, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28025903/antibacterial-coating-on-in-line-suction-respiratory-catheter-to-inhibit-the-bacterial-biofilm-formation-using-renewable-cardanyl-methacrylate-copolymer
#5
Denial Mahata, Ahindra Nag, Santi M Mandal, Golok B Nando
Health-care materials associated with infections are very common in hospital admitted patients. There are generally infected by contact with the catheter or other multipurpose devices which are contacted with microbes. The respiratory infections associated with the pathogens having strong biofilm forming ability on catheter surface, causes life-threatening in every year. Therefore, a catheter coating material is of great interest which inhibits the biofilm formation of pathogens on a catheter to prevent respiratory infections...
January 6, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28056727/preparation-and-mineralization-of-a-biocompatible-double-network-hydrogel
#6
Quanzhu Yang, Fangfang Song, Xueqing Zou, Liqiong Liao
Double network (DN) hydrogels have shown favorable toughness and strength and been harnessed as scaffolding materials in tissue engineering, particularly, mineralized DN hydrogels may be potential scaffolds in bone tissue engineering. In this paper, DN hydrogels were fabricated from poly(ethylene glycol) diacrylate (PEGDA) and methacrylated poly(γ-glutamic acid) (mPGA). This DN hydrogel not only showed excellent mechanical properties but also good cytocompatibility as evidenced by the characterizations in terms of swelling ratio, mechanical strength/modulus, and cytotoxicity...
January 5, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28054502/enhanced-ph-stability-cell-viability-and-reduced-degradation-rate-of-poly-l-lactide-based-composite-in-vitro-effect-of-modified-magnesium-oxide-nanoparticles
#7
Jinjun Yang, Xiuxiang Cao, Yun Zhao, Liang Wang, Bei Liu, Junping Jia, Hui Liang, Minfang Chen
The modified MgO nanoparticles (m-MgO-NPs) by a copolymer containing the malic acid and low molecular weight (LMW) poly(L-lactide) (poly(L-lactide-co-malic acid), PLMA) have been successfully prepared. MgO nanoparticles (MgO-NPs) were coated by the PLMA and m-MgO-NPs were uniformly dispersed in the PLLA matrix to a novel biocomposite material (PLLA/m-MgO-NPs) with more excellent interface bonding and uniformer dispersion, compared to the PLLA/MgO-NPs. Compared to neat PLLA and PLLA/MgO-NPs film, the m-MgO-NPs not only shown the obvious neutralization effect on the acidic solution in the degradation of the PLLA and better hydrophilicity, but also exhibited the higher cell viability and decrease the toxicity to the cell in the degradation process of PLLA in vitro...
January 5, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28044473/synthesis-characterization-and-in-vitro-evaluation-of-targeted-gold-nanoshelled-poly-d-l-lactide-co-glycolide-nanoparticles-carrying-anti-p53-antibody-as-a-theranostic-agent-for-ultrasound-contrast-imaging-and-photothermal-therapy
#8
Li Xu, Caifeng Wan, Jing Du, Hongli Li, Xuesong Liu, Hong Yang, Fenghua Li
Breast cancer is the leading cause of cancer-related deaths in women and earlier detection can substantially reduce deaths from breast cancer. Polymers with targeted ligands are widely used in the field of molecular ultrasound imaging and targeted tumor therapy. In our study, the nanotheranostic agent was fabricated through filling perfluoropropane (C3F8) into poly(D,L-lactic-co-glycolic acid) nanoparticles (PLGA NPs), followed by the formation of gold nanoshell on the surface, then conjugated with anti p53 antibody which has high specificity with the p53 protein overexpressing in breast cancer...
January 3, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28001498/evaluation-of-the-osteoconductive-potential-of-poly-propylene-carbonate-nano-hydroxyapatite-composites-mimicking-the-osteogenic-niche-for-bone-augmentation
#9
Qin Zou, Jianguo Liao, Jidong Li, Yubao Li
Nano-hydroxyapatite (n-HA) reinforced poly(propylene carbonate) (PPC) composites were prepared for bone repair and reconstruction. The effects of reinforcement on the morphology, mechanical properties and biological performance of n-HA/PPC composites were investigated. The surface morphology and mechanical properties of the composites were characterized by scanning electron microscopy (SEM) and universal material testing machine. The analytical data showed that good incorporation and dispersion of n-HA crystals could be obtained in the PPC matrix at a 30:70 weight ratio...
December 29, 2016: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/27931160/preparation-of-hollow-core-shell-fe3o4-graphene-oxide-composites-as-magnetic-targeting-drug-nanocarriers
#10
Junmei Wang, Jianjun Fang, Pan Fang, Xian Li, Shijie Wu, Wenjing Zhang, Sufang Li
A main challenge for anticancer drugs is that the drugs can not arrive the cancer tissue at right time. In this work, a magnetic targeting nanoparticle based on hollow Fe3O4/graphene oxide (Fe3O4/GO) was developed as a potential tumor targeting drug carriers. The morphology results showed the Fe3O4 nanoparticles were uniformly wrapped by graphene oxide. After coating with graphene oxide, the Fe3O4/GO showed a higher saturation magnetization of 71.47 emu g(-1) as compared to neat Fe3O4 nanoparticles. The drug loading and releasing experiment indicated the obtained Fe3O4/GO has a good loading capacity of of 0...
December 28, 2016: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28027693/patupilone-loaded-poly-l-glutamic-acid-graft-methoxy-poly-ethylene-glycol-micelle-for-oncotherapy
#11
Jing Yan, Dawei Zhang, Haiyang Yu, Lili Ma, Mingxiao Deng, Zhaohui Tang, Xuefei Zhang
Patupilone, an original natural anti-cancer agent, also known as epothilone B or Epo906, has shown promise for the treatment of a variety of cancers, however, the systematic side effects of patupilone significantly impaired its clinical translation. Herein, patupilone-loaded PLG-g-mPEG micelles were prepared. Patupilone was grafted to a poly(L-glutamic acid)-graft-methoxy-poly(ethylene glycol) (PLG-g-mPEG) by Steglich esterification reaction to give PLG-g-mPEG/Epo906 that could self-assemble to form patupilone-loaded micelles (Epo906-M)...
December 27, 2016: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/27827558/interaction-of-bioactive-compounds-on-capillary-inner-surfaces-bearing-a-dense-thermoresponsive-polymer-brush
#12
Takuya Koriyama, Yosuke Takayama, Chiho Hisatsune, Taka-Aki Asoh, Akihiko Kikuchi
To confirm the modification of a dense thermoresponsive polymer brush on a silica surface by surface-initiated (SI) atom transfer radical polymerization (ATRP), poly(N-isopropylacrylamide) (PNIPAAm) was polymerized from a free ATRP initiator and an ATRP initiator immobilized silica particle (SiP) via ATRP under various initiator concentrations. The obtained PNIPAAm exhibited a well-controlled molecular weight and modification of the concentrated PNIPAAm brush on the SiP surface was confirmed. Based on the optimal ATRP conditions, the PNIPAAm- and poly(NIPAAm-co-butyl methacrylate [BMA]) (PIB)-grafted capillary lumen were prepared by SI-ATRP and used as capillary columns for micro high-performance liquid chromatography for the modulation of biomolecular interactions...
November 21, 2016: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/27774855/preparation-and-properties-of-biomedical-segmented-polyurethanes-based-on-poly-ether-ester-and-uniform-size-diurethane-diisocyanates
#13
Shengnan Yin, Yiran Xia, Qi Jia, Zhao-Sheng Hou, Na Zhang
This study describes the preparation and properties of a novel aliphatic cost-effective segmented polyurethanes (SPUs) based on poly(ether ester) (poly-(ε-caprolactone-co-L-lactide)-poly(ethylene glycol)-poly-(ε-caprolactone-co-L- lactide), PECLA) and uniform-size diurethane diisocyanates (HDI-BDO-HDI). PECLA was synthesized via bulk ring-opening polymerization with poly(ethylene glycol) (PEG) as an initiator and ε-caprolactone, L-lactide as monomers. By chain extension of PECLA diol with HDI-BDO-HDI, three SPUs with different hydrophilic segments content and hard segments content were obtained...
October 23, 2016: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/27931176/in-vitro-evaluation-of-electrospun-silk-fibroin-nano-hydroxyapatite-bmp-2-scaffolds-for-bone-regeneration
#14
Bingjie Niu, Bin Li, Yong Gu, Xiaofeng Shen, Yong Liu, Liang Chen
Bone tissue engineering by using osteoinductive scaffolds seeded with stem cells to promote bone extracellular matrix (ECM) production and remodeling has evolved into a promising approach for bone repair and regeneration. In order to mimic the ECM of bone tissue structurally and compositionally, nanofibrous silk fibroin (SF) scaffolds containing hydroxyapatite (HAP) nanoparticles and bone morphogenetic protein 2 (BMP-2) were fabricated in this study using electrospinning technique. The microstructure, mechanical property, biocompatibility, and osteogenic characteristics were examined...
February 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/27931163/preparation-characterization-and-in-vitro-anticoagulant-activity-of-corn-stover-xylan-sulfates
#15
He-Li Cheng, Hao Liu, Qing-Hua Feng, Yi-Min Xie, Huai-Yu Zhan
A new anticoagulant agent was prepared by introducing sulfate groups into corn stover xylan through homogeneous reactions. Three organic solvents, N, N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO) and formamide (FA), were adopted as reaction media, with the assistance of LiCl. Structural characterization by FT-IR and (13)CNMR showed that xylan sulfate (XS) could be successfully synthesized with SO3∙Pyridine (SO3∙Py) complexes sulfation reagent in the three media. The effect of sulfation temperature, sulfation time, media type and molar ratio of -SO3/-OH on the degree of substitution (DS) and degree of the polymerization (DP) were studied...
February 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/27931162/influence-of-the-structure-of-poly-l-lactic-acid-electrospun-fibers-on-the-bioactivity-of-endothelial-cells-proliferation-and-inflammatory-cytokines-expression
#16
Xiaoyan Liu, Xiazhi Zhang, Keke Wu, Wufeng Yang, Yanpeng Jiao, Changren Zhou
Electrospinning has been used to fabricate random and aligned poly (L-lactic acid) (PLLA) fibers with three kinds of diameter under optimal conditions. The main purpose of this paper was to investigate the influence of the diameter and orientation of fibers on the bioactivity of endothelial cells, especially on the inflammatory cytokines expression. The morphology of electrospun fibers and the cells on the fibers after 3 and 6 days culture were observed by scanning electron microscopy. Also the cell proliferation activity and cell cycle were tested and the results showed that the random fibers were more favorable for endothelial cells growth...
February 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/27929801/preparation-of-native-cellulose-agcl-fiber-with-antimicrobial-activity-through-one-step-electrospinning
#17
Shaojun Wang, Xiaomin Zhang, Ting Luo, Jin Zhu, Shengpei Su
The native Cellulose-AgCl fiber have been firstly fabricated by one-step electrospinning of cellulose solution with poly(vinyl pyrrolidone) (PVP) and AgNO3. X-ray diffraction, Scanning electron microscopy (SEM), Energy dispersive spectrometer, Thermo-gravimetric analysis and Fourier transform infrared are used to characterize the crystal structure, morphology and composition of cellulose-AgCl nanocomposites. The results of SEM indicate that the size of AgCl in cellulose fiber matrix is able to be adjusted by the addition of Polyvinylpyrrolidone (PVP)...
February 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/27929366/in-vitro-gastrointestinal-resistant-pectin-hydrogel-particles-for-%C3%AE-glucuronidase-adsorption
#18
Sergey V Popov, Pavel A Markov, Olga A Patova, Fedor V Vityazev, Larisa A Bakutova, Mikhail F Borisenkov, Ekaterina A Martinson, Boris A Ananchenko, Eugene A Durnev, Andrey A Burkov, Sergey G Litvinets, Vladimir A Belyi, Elena A Ipatova
Pectin hydrogel particles (PHPs) were prepared by ionotropic gelation of low methylesterified pectin of Tanacetum vulgare L. with calcium ions. Wet PHPs prepared from TVF exhibited a smaller diameter and the lower weight as well as exhibited the best textural properties in terms of hardness and elasticity compared to the PHPs prepared from commercial low methylesterified pectin (CU701) used for comparison. Upon air drying, PHPs prepared from CU701 became small and dense microspheres whereas the dry PHPs prepared from TVF exhibited a drop-like shape...
February 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/27910727/tannin-based-adhesive-for-protection-of-colonic-anastomosis-in-the-open-abdomen
#19
Youming Deng, Jianan Ren, Guopu Chen, Gefei Wang, Guosheng Gu, Jieshou Li
This study was aimed to evaluate the effect of tannin acid- polyethylene glycol (TP) adhesive on the wound healing process of primary colonic anastomosis in the open abdomen (OA). Adhesion strength test, degradation and hemostatic ability of TP were investigated. In a rat model, after standard colonic anastomoses, rats were divided into three groups: OA group; OA + FG (fibrin glue) group; OA + TP group. Five days after surgery, body weight, anastomotic bursting pressure (ABP), and histology of anastomotic tissue were evaluated...
February 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/27875944/development-and-evaluation-of-a-novel-polymeric-hydrogel-of-sucrose-acrylate-co-polymethylacrylic-acid-for-oral-curcumin-delivery
#20
Sijin Huang, Jialei Wang, Qing Shang
A monomer of sucrose acrylate (AC-sucrose) was synthesized by conjugating starting compound sucrose with methyl acrylate (MA). The obtained AC-sucrose was characterized by mass spectrometry (MS) and Fourier transform infrared (FTIR) spectroscopy. AC-sucrose was selected as a monomer to fabricate a novel pH sensitive hydrogel via free radical polymerization. The inner morphology of the final hydrogel was observed with an S-4800 scanning electron microscope (SEM). The swelling and de-swelling behaviors of the hydrogel chips were also studied...
February 2017: Journal of Biomaterials Science. Polymer Edition
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