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Journal of Biomaterials Science. Polymer Edition

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https://www.readbyqxmd.com/read/29768120/three-dimensionally-printed-pearl-powder-poly-caprolactone-composite-scaffolds-for-bone-regeneration
#1
Xu Zhang, Xiaoyu Du, Dejian Li, Rongguang Ao, Bin Yu, Baoqing Yu
Pearl has great potential as a natural biomaterial for bone tissue engineering, but it suffers from low porosity, difficulty in molding, and poor anti-buckling property. In this study, we used the 3-D printing technique to fabricate original pearl powder and PCL composite scaffolds with different concentrations of pearl powder. The four groups of scaffolds were termed PCL, 30% Pearl/PCL, 50% Pearl/PCL and 80% Pearl/PCL scaffolds according to the proportion of pearl powder. The samples were systematically investigated by scanning electron microscopy (SEM), wide-angle XRD, liquid substitution, Zwick static materials testing, and energy dispersive X-ray analysis...
May 16, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29764304/prednisolone-loaded-coatable-polyvinyl-alcohol-alginate-hydrogel-for-the-treatment-of-atopic-dermatitis
#2
Hye Ri Lee, Tae Ho Kim, Se Heang Oh, Jin Ho Lee
Atopic dermatitis (AD) is a chronic inflammatory skin disease resulting pruritic, erythema, edema, excoriation, and thickening of the skin, and thus leads to significant impairment in the patient's life. The objective of this study is to develop a steroid drug [prednisolone (PS)]-loaded coatable hydrogel for the treatment of AD. PS-loaded hydrogel was composed of PVA entrapped in mildly crosslinked alginate (PS-loaded PVA/ALG hydrogel). The PS concentration to be loaded in the hydrogel that takes AD efficacy without cell necrosis was determined from the cytotoxicity test using human dermal fibroblasts...
May 15, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29764301/bioinspired-biocompatible-and-peptide-decorated-silk-fibroin-coatings-for-enhanced-osteogenesis-of-bioinert-implant
#3
Chunyan Wang, Shengnan Wang, Yuanyi Yang, Zhuo Jiang, Yi Deng, Shaoli Song, Weizhong Yang, Zhi-Gang Chen
In this study, we develop an osteopromotive polyetheretherketone (PEEK) implant decorated with silk fibroin and bone forming peptide, in which the surface of bioinert PEEK implant is firstly sulfonated to form a three-dimensional, porous topography and then is functionalized with silk fibroin via spin-coating process and peptide decoration. The bio-test results show that cells on the functional bioinert implants exhibit better cell adhesion, proliferation and spreading, when compared with the uncoated ones...
May 15, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29749303/ptx-loaded-three-layer-plga-cs-alg-nanoparticle-based-on-layer-by-layer-method-for-cancer-therapy
#4
Fang Wang, Jian Yuan, Qian Zhang, Siqian Yang, Shaohua Jiang, Chaobo Huang
Poly (lactic-co-glycolic acid) (PLGA) nanoparticles are an ideal paclitaxel (PTX)-carrying system due to its biocompatibility and biodegradability. But it possessed disadvantage of drug burst release. In this research, a layer-by-layer deposition of chitosan (CS) and sodium alginate (ALG) was applied to modify the PLGA nanoparticles. The surface charges and morphology of the PLGA, PLGA/CS and PLGA/CS/ALG particles was measured by capillary electrophoresis and SEM and TEM, respectively. The drug encapsulation and loading efficiency were confirmed by ultraviolet spectrophotometer...
May 11, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29745306/biocompatibility-and-in-vivo-degradation-of-chitosan-based-hydrogels-as-potential-drug-carrier
#5
Xue Liu, Feng Su, Xin Shen, Yuandou Wang, Xingjian Zhang, Quansheng Xing, Lihong Wang, Yangsheng Chen
Carboxymethyl chitosan-graft-polylactide (CMCS-PLA) and carboxymethyl chitosan (CMCS) hydrogels were prepared by using 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride/N-hydroxysuccinimide (EDC/NHS) as crosslinking agent and catalyst at room temperature. The biocompatibility of the hydrogels was evaluated with the aim of assessing their potential as drug carrier. Various aspects of biocompatibility were considered, including MTT assay, agar diffusion test, release of lactate dehydrogenase (LDH), hemolytic test, plasma recalcification time (PRT), and dynamic clotting time...
May 10, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29734864/preparation-of-sponge-like-macroporous-pva-hydrogels-via-n-ha-enhanced-phase-separation-and-their-potential-as-wound-dressing
#6
Ruirui Feng, Rongzhan Fu, Zhiguang Duan, Chenhui Zhu, Xiaoxuan Ma, Daidi Fan, Xian Li
Polyvinyl alcohol (PVA) hydrogels have been widely studied for biomedical applications due to their water solubility, non-toxicity, non-carcinogenicity, and biocompatibility. However, PVA hydrogels prepared by the physical crosslinking method usually do not exhibit a macroporous structure, which limits their application when PVA hydrogels are used alone as a wound dressing. Here, we reported a sponge-like macroporous PVA hydrogel (SPH) prepared by employing polyethylene glycol and nano-hydroxyapatite (n-HA) to enhance phase separation...
May 7, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29716440/3d-printing-process-of-oxidized-nanocellulose-and-gelatin-scaffold
#7
Xiaodong Xu, Jiping Zhou, Yani Jiang, Qi Zhang, Hongcan Shi, Dongfang Liu
For tissue engineering applications tissue scaffolds need to have a porous structure to meet the needs of cell proliferation/differentiation, vascularisation and sufficient mechanical strength for the specific tissue. Here we report the results of a study of the 3D printing process for composite materials based on oxidized nanocellulose and gelatin, that was optimised through measuring rheological properties of different batches of materials after different crosslinking times, simulation of the pneumatic extrusion process and 3D scaffolds fabrication with Solidworks Flow Simulation, observation of its porous structure by SEM, measurement of pressure-pull performance, and experiments aimed at finding out the vitro cytotoxicity and cell morphology...
May 2, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29683392/synthetic-polymannose-as-a-drug-carrier-synthesis-toxicity-and-anti-fungal-activity-of-polymannose-amphotericin-b-conjugates
#8
Arul Prakash Francis, Sneha Gurudevan, A Jayakrishnan
Polymannose (PM) having a weight-average molar mass (Mw ) of 30-53 kDa was synthesized by the polycondensation of mannose using phosphorous acid as the catalyst and characterized by various techniques such as NMR, IR, GPC and polarimetry. 2D NMR results confirmed the presence of (1→ 6)-linked α-D-mannose residues as backbone with O-3 and O-2 substituted linear or branched chains in PM. Amphotericin B (AmB) was conjugated to periodate-oxidized PM through Schiff's linkages at 20 wt% concentration. The AmB-PM conjugates were highly soluble in phosphate buffered saline (180-250 mg/mL), exhibited negligible hemolytic potential to human erythrocytes even at a concentration of 200 μg /mL (equivalent to ~ 40 μg/mL AmB) and were non-toxic to human embryonic kidney (HEK293T) cells even at a concentration of 250 μg/mL (equivalent to ~ 50 μg/mL AmB)...
April 23, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29667520/preparation-and-properties-of-cryogel-based-on-poly-hydroxypropyl-methacrylate
#9
Mengfan Zhai, Feng Ma, Junying Li, Binbin Wan, Ning Yu
A novel supermacroporous poly(hydroxypropyl methacrylate) (p(HPMA)) cryogel was synthesized by cryogelation method at -16 °C. In this synthesis process, HPMA was used as a monomer, and N,N'-methylenebisacrylamide (MBAAm) was used as cross-linker; the reaction was carried out in the presence of redox initiator pair N,N,N',N'-tetramethylene diamine (TEMED) and ammonium persulfate (APS). The effect of monomer concentration, cross-linker content, cooling rate, and dioxane co-solvent were determined with respect to the pore structure, mechanical behavior, swelling degree, and porosity of cryogel...
April 18, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29667511/development-of-coaxial-alginate-pcl-nanofibrous-dressing-for-controlled-release-of-spirulina-extract
#10
Min Sik Kim, Hye Jin Kim, Jin Young Jang, Hwa Sung Shin
of bioactive material that can be impregnated into dressing materials. The aim of this stud Spirulina has widely been highlighted as a source y was to widen the application fields of Spirulina extract-containing nanofiber, which has been suggested as an attractive dressing material in several previous studies. The bioactivity release pattern, water absorbance, and mechanical strength must be controllable. Spirulina extract was physically impregnated inside a nanofiber without significant chemical bonding to polycaprolactone or alginate polymers...
April 18, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29661115/synthesis-and-evaluation-of-water-soluble-ph-sensitive-poly-vinyl-alcohol-doxorubicin-conjugates
#11
Nahla Rahoui, Bo Jiang, Nadia Taloub, Mohammad Hegazy, Yu Dong Huang
The accuracy of spatiotemporal control cargo delivery and release are primordial to enhance the therapeutic efficiency and decrease the undesirable effects, in this context a novel prodrug were developed based on biocompatible polyvinyl alcohol (PVA) substrate. PVA was conjugated to doxorubicin (PVA-DOX) via an acid-labile hydrazone linkage. PVA was first functionalized with acidic groups, then reacted with hydrazine hydrate to form an amide bond. The amine group of PVA hydrazide was linked to carbonyl group (C=O) of DOX to form a pH sensitive hydrazone bond...
April 17, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29661104/effect-of-micro-roughening-of-poly-ether-ether-ketone-on-bone-marrow-derived-stem-cell-and-macrophage-responses-and-osseointegration
#12
Sunarso, Akira Tsuchiya, Naoyuki Fukuda, Riki Toita, Kanji Tsuru, Kunio Ishikawa
Poly(ether ether ketone) (PEEK) has emerged as a candidate to replace metal implants because of its satisfactory mechanical properties, radiolucency, and lack of metal allergy. However, PEEK lacks osseointegration ability limiting its clinical applications. To overcome this problem, we prepared PEEK with a micro-rough surface using the sandblast method to modulate its osseointegration property; the sandblast method is simple, cost-effective, and is already applied to clinical metal implants. The surface roughness of the sandblasted PEEK was about 2...
April 16, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29656699/hybrid-polycaprolactone-polyethylene-oxide-scaffolds-with-tunable-fiber-surface-morphology-improved-hydrophilicity-and-biodegradability-for-bone-tissue-engineering-applications
#13
Remya K R, Sunitha Chandran, Susan Mani, Annie John, P Ramesh
In the present study, we attempt to modify Polycaprolactone (PCL) by blending it with a water soluble polymer Polyethyleneoxide (PEO) having two different molecular weights (Mv ~1,00,000 and 6,00,000) using electrospinning technique. The effect of PEO molecular weight and blend ratio on fiber morphology, porosity, surface wettability, static and dynamic mechanical properties of PCL was investigated. In vitro degradation studies in phosphate buffer saline (PBS) at 37°C demonstrated formation of pores on fiber surface especially in blend scaffolds with 50:50 ratios...
April 16, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29649935/polyurethane-nano-hydroxyapatite-composite-films-as-osteogenic-platforms
#14
Bailey K Barnes, Austin J Bow, Ganesh Kannarpady, Alexandru S Biris, David E Anderson, Madhu Dhar, Shawn E Bourdo
A wide variety of biomaterials are utilized in tissue engineering to generate living cells in vitro or to promote tissue growth in vivo. Regeneration of living tissue from biocompatible materials may make it possible to grow tissues ranging from bone to nerve cells. In bone regeneration, polymeric scaffolds can be enhanced by the addition of bioactive materials. To this end, this study designed several ratios of polyurethane (PU) and nano-hydroxyapatite (nHA) composites (PU-nHA ratios: 100/0, 90/10, 80/20, 70/30, 60/40 w/w)...
April 13, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29611463/an-integrated-strategy-based-on-dual-targeting-nanoparticles-for-enhanced-intracellular-drug-delivery-and-synergistic-therapeutic
#15
Mingxin Wang, Chaoqun You, Zhiguo Gao, Hongshuai Wu, Baiwang Sun, Xiaoli Zhu, Renjie Chen
The functionalized nanoparticles have been widely studied and reported as carriers of drug transport recently. Furthermore, many groups have focused more on developing novel and efficient treatment methods, such as photodynamic therapy and photothermal therapy, since both therapies have shown inspiring potential in the application of antitumor. The mentioned treatments exhibited the superiority of cooperative manner and showed the ability to compensate for the adverse effects caused by conventional monotherapy in proposed strategies...
April 3, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29611461/poly-ethylene-glycol-chitosan-sodium-glycerophosphate-gel-replaced-the-joint-capsule-with-slow-release-lubricant-after-joint-surgery
#16
Hailin Lu, Shanshan Ren, Xing Li, Junde Guo, Guangneng Dong, Jianhui Li, Li Gao
Body fluid is normally the only lubricant after joint replacement surgery, but wear problems have occurred because body fluid has poor lubrication ability. However, traditional lubricant would be diluted by body fluids and then absorbed by the human body. Therefore, an injectable gel with the ability to slow-release lubricant was designed to replace the joint capsule. The proposed gel, poly(ethylene glycol)/chitosan/sodium glycerophosphate (PEG/CS/GP) composite gel was then tested. The tribology results showed that the PEG/CS/GP gel had excellent slow-release properties, especially under pressure, and the PEG played an important role in improving the gel's rheological and mechanical properties...
April 3, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29609508/dynamical-release-nanospheres-containing-cell-growth-factor-from-biopolymer-hydrogel-via-reversible-covalent-conjugation
#17
Bowen Ren, Xueyun Chen, Ye Ma, Shoukang Du, Saibo Qian, Yongjie Xu, Zhilin Yan, Jianliang Li, Yang Jia, Huaping Tan, Zhonghua Ling, Yong Chen, Xiaohong Hu
For practical adipose regeneration, the challenge is to dynamically deliver the key adipogenic insulin-like growth factors in hydrogels to induce adipogenesis. In order to achieve dynamic release, smart hydrogels to sense the change in the blood glucose concentration is required when glucose concentration increases. In this study, a heparin-based hydrogel has been developed for use in dynamic delivery of heparin nanospheres containing insulin-like growth factor. The gel scaffold was facilely prepared in physiological conditions by the formation of boronate-maltose ester cross-links between boronate and maltose groups of heparin derivatives...
April 3, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29607779/detection-of-ciprofloxacin-through-surface-plasmon-resonance-nanosensor-with-specific-recognition-sites
#18
Esma Sari, Recep Üzek, Memed Duman, Adil Denizli
The novel nanosensor based on Surface Plasmon Resonance (SPR) was developed for sensitive and selective detection of ciprofloxacin via molecularly imprinted nanoparticles (MIP/NPs). NPs were synthesized through miniemulsion polymerization technique with methacrylic acid as a functional monomer. FTIR, SEM, zetasizer and contact angle measurements were used for the characterization of MIP/NPs. After modification the SPR chip surface, the nanosensor was used for detection of ciprofloxacin in aqueous solution. According to selected concentration range, the correlation coefficient and limit of detections were obtained as 0...
April 2, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29578386/the-influence-of-spatial-distribution-on-add-on-therapy-of-designed-ca-alg-cs-mems-system
#19
Qinglei Dai, Xia Zhou, Kejing Wu, Ruimin Long, Shibin Wang, Haiwang Huang, Yanhua Xia, Yuangang Liu
To improve the efficacy and reduce the systemic toxicity of the diabetes mellitus, herewith, we developed a novel microparticles-embedded microcapsules (MEMs) system, synthesized from calcium alginate/chitosan (Ca-Alg/CS), by emulsion gelation using a high voltage electrostatic droplet generator. In our study, we selected two antidiabetic drugs insulin (INS) and metformin (MET) as model drugs to investigate different spatial distribution appropriate of MEMs system. Characterization based on particle size and morphology, encapsulation efficiency and drug loading, as well as drug delivery properties were carried out on the MEMs system...
March 26, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29561222/preparation-of-gelatin-nanoparticles-by-two-step-desolvation-method-for-application-in-photodynamic-therapy
#20
Janicy Arantes Carvalho, Alexandro Silva Abreu, Vitória Tonini Porto Ferreira, Erika Peterson Gonçalves, Antonio Claudio Tedesco, Juliana Guerra Pinto, Juliana Ferreira-Strixino, Milton Beltrame Junior, Andreza Ribeiro Simioni
Gelatin nanoparticles have recently been receiving considerable attention because they offer a good option as release systems due to their low cost, biocompatibility, biodegradability and its application in several types of formulations. This study aim was to evaluate the potential application of gelatin nanoparticles entrapping a photosensitizer in Photodynamic Therapy. Gelatin nanoparticles were studied by steady-state techniques and the biological activity evaluated by in vitro MTT assay. The particles were spherical in shape exhibiting a 273 nm diameter with a low tendency to aggregate...
March 21, 2018: Journal of Biomaterials Science. Polymer Edition
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