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https://www.readbyqxmd.com/read/29034774/mechanical-enhancement-and-in-vitro-biocompatibility-of-nanofibrous-collagen-chitosan-scaffolds-for-tissue-engineering
#1
Fengjuan Zou, Runrun Li, Jianjun Jiang, Xiumei Mo, Guofeng Gu, Zhongwu Guo, Zonggang Chen
The collagen-chitosan complex with a three-dimensional nanofiber structure was fabricated to mimic native ECM for tissue repair and biomedical applications. Though the three-dimensional hierarchical fibrous structures of collagen-chitosan composites could provide more adequate stimulus to facilitate cell adhesion, migrate and proliferation, and thus have the potential as tissue engineering scaffolding, there are still limitations in their applications due to the insufficient mechanical properties of natural materials...
October 16, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29032216/gelatin-oxidized-carboxymethyl-cellulose-blend-based-tubular-electrospun-scaffold-for-vascular-tissue-engineering
#2
Jincy Joy, Jessica Pereira, Rachida Aid-Launais, Graciela Pavon-Djavid, Alok R Ray, Didier Letourneur, Anne Meddahi-Pellé, Bhuvanesh Gupta
The present work deals with the fabrication of electrospun tubular scaffold based on in-situ crosslinked blend of gelatin - oxidized carboxymethyl cellulose (OCMC) for vascular tissue engineering. The flow behavior and spinability of the hydrogel despite the in-situ crosslinked gelatin chains evaluated by Raman spectroscopic studies and rheological studies was utilized for electrospinning. The study highlights the tunable pore size and fiber diameter of the nanofibers with the manipulation of electrospinning parameters...
October 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29025671/in-situ-and-ex-situ-modifications-of-bacterial-cellulose-for-applications-in-tissue-engineering
#3
REVIEW
Taisa Regina Stumpf, Xiuying Yang, Jingchang Zhang, Xudong Cao
Bacterial cellulose (BC) is secreted by a few strains of bacteria and consists of a cellulose nanofiber network with unique characteristics. Because of its excellent mechanical properties, outstanding biocompatibilities, and abilities to form porous structures, BC has been studied for a variety of applications in different fields, including the use as a biomaterial for scaffolds in tissue engineering. To extend its applications in tissue engineering, native BC is normally modified to enhance its properties...
January 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29025660/electrospun-carboxyl-multi-walled-carbon-nanotubes-grafted-polyhydroxybutyrate-composite-nanofibers-membrane-scaffolds-preparation-characterization-and-cytocompatibility
#4
Cai Zhijiang, Zhu Cong, Guo Jie, Zhang Qing, Zhao Kongyin
Electrospun polyhydroxybutyrate (PHB)/carboxyl multi-walled carbon nanotubes grafted polyhydroxybutyrate (CMWCNT-g-PHB) composite nanofibers scaffolds were fabricated by electrospinning technology. The grafted product CMWCNT-g-PHB was prepared by condensation reactions between the carboxyl groups of CMWCNT and hydroxyl groups of PHB molecules and characterized by FTIR, XRD, XPS, TG and TEM measurements. The surface morphology, hydrophilicity and tensile mechanical properties of the electrospun PHB/CMWCNT-g-PHB composite nanofibers membrane scaffolds were investigated...
January 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29024376/evaluation-of-collagen-foam-poly-l-lactic-acid-nanofiber-mesh-and-decellularized-matrices-for-corneal-regeneration
#5
Bahar Aslan, Selcan Guler, Atakan Tevlek, Halil Murat Aydin
Corneal tissue engineering efforts to obtain corneal tissue matrices through various types of materials for the replacement of damaged tissues. In this study, three different corneal constructs were prepared and evaluated in terms of morphological, optical, and biological characteristics. Type-I collagen was used to obtain collagen foam scaffolds through dehydrothermal crosslinking, while poly(l-lactic acid) (PLLA) was used to produce both random and aligned oriented electrospun corneal constructs. Bovine corneas were decellularized as third matrix...
October 12, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29023390/electrospun-zein-gelatin-scaffold-enhanced-cell-attachment-and-growth-of-human-periodontal-ligament-stem-cells
#6
Fanqiao Yang, Yingling Miao, Yan Wang, Li-Ming Zhang, Xuefeng Lin
Periodontitis is a widespread dental disease affecting 10 to 15% of worldwide adult population, yet the current treatments are far from satisfactory. The human periodontal ligament stem cell is a promising potential seed cell population type in cell-based therapy and tissue regeneration, which require appropriate scaffold to provide a mimic extracellular matrix. Zein, a native protein derived from corn, has an excellent biodegradability, and therefore becomes a hotspot on research and application in the field of biomaterials...
October 12, 2017: Materials
https://www.readbyqxmd.com/read/29023089/gelatin-polyaniline-composite-nanofibers-enhanced-excitation-contraction-coupling-system-maturation-in-myotubes
#7
Serge Ostrovidov, Majid Ebrahimi, Hojae Bae, Hung Kim Nguyen, Sahar Salehi, Sang Bok Kim, Akichika Kumatani, Tomokazu Matsue, Xuetao Shi, Ken Nakajima, Shizu Hidema, Makoto Osanai, Ali Khademhosseini
In this study, composite gelatin-polyaniline (PANI) nanofibers doped with camphorsulfonic acid (CSA) was fabricated by electrospinning and used as substrates to culture C2C12 myoblast cells. We observed enhanced myotube formation on composite gelatin-PANI nanofibers compared to gelatin nanofibers, concomitantly with enhanced myotube maturation. Thus, in myotubes, intracellular organization, co-localization of the dihydropyridine receptor (DHPR) and ryanodine receptor (RyR), expression of genes correlated to the excitation-contraction (E-C) coupling apparatus, calcium transients, and myotube contractibility were increased...
October 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29020691/erratum-comparison-of-platelet-rich-plasma-stromal-vascular-fraction-svf-or-svf-with-an-injectable-plga-nanofiber-scaffold-for-the-treatment-of-osteochondral-injury-in-dogs
#8
Samuel P Franklin, Aaron M Stoker, Chantelle C Bozynski, Keiichi Kuroki, Kevin M Clarke, Jed K Johnson, James L Cook
No abstract text is available yet for this article.
October 11, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29017145/synergetic-stimulation-of-nanostructure-and-chemistry-cues-on-behaviors-of-fibroblasts-and-endothelial-cells
#9
Zhi Wu, Yachen Xu, Haiyan Li
It has been widely accepted that cell behaviors can be affected by multiple kinds of biomaterial stimulation signals. Although many literatures have focused on studying the multiple biomaterials stimulatory cues in affecting cellular behaviors, systematic studies on the effects of individual and combination of multiple biomaterials stimulatory cues in regulating cellular behaviors and their potential possible mechanisms have rarely been reported. We hypothesized that tissue engineering scaffolds with enhanced bioactivity can be designed if synergetic effects between different kinds of biomaterial stimulation cues in affecting cells behaviors can be found and applied...
October 3, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28990762/multichanneled-nerve-guidance-conduit-with-spatial-gradients-of-neurotrophic-factors-and-oriented-nanotopography-for-repairing-the-peripheral-nervous-system
#10
Yo-Cheng Chang, Ming-Hong Chen, Shih-Yung Liao, Hsi-Chin Wu, Chen-Hsiang Kuan, Jui-Sheng Sun, Tzu-Wei Wang
Peripheral nerve injuries, causing sensory and motor impairment, affect a great number of patients annually. It is therefore important to incorporate different strategies to promote nerve healing. Among the treatment options, however, the efficacy of nerve conduits is often compromised by their lack of living cells, insufficient growth factors, and absence of the extracellular matrix (ECM)-like structure. To improve the functional recovery, we aimed to develop a natural biodegradable multichanneled scaffold characterized with aligned electrospun nanofibers and neurotrophic gradient (MC/AN/NG) to guide axon outgrowth...
October 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28989119/effects-of-protein-coated-nanofibers-on-conformation-of-gingival-fibroblast-spheroids-potential-utility-for-connective-tissues-regeneration
#11
Gili Kaufman, Ryan Whitescarver, Laiz Nunes, Xavier-Lewis Palmer, Drago Skrtic, Wojtek Tutak
Deep wounds in the gingiva caused by trauma or surgery require a rapid and robust healing of connective tissues. We propose utilizing gas-brushed nanofibers coated with collagen and fibrin for that purpose. Our hypotheses are that protein-coated nanofibers will: (i) attract and mobilize cells in various spatial orientations, and (ii) regulate the expression levels of specific extracellular matrix (ECM)-associated proteins, determining the initial conformational nature of dense and soft connective tissues. Gingival fibroblast monolayers and 3D spheroids were cultured on ECM substrate and covered with gas-blown poly-(DL-lactide-co-glycolide) (PLGA) nanofibers (uncoated/coated with collagen and fibrin)...
October 9, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28986947/in-vivo-diabetic-wound-healing-with-nanofibrous-scaffolds-modified-with-gentamicin-and-recombinant-human-epidermal-growth-factor
#12
Charu Dwivedi, Ishan Pandey, Himanshu Pandey, Sandip Patil, Shanti Bhushan Mishra, Avinash C Pandey, Paolo Zamboni, Pramod W Ramteke, Ajay Vikram Singh
Diabetic wounds are susceptible to microbial infection. The treatment of these wounds requires a higher payload of growth factors. With this in mind, the strategy for this study was to utilize a novel payload comprising of Eudragit RL/RS 100 nanofibers carrying the bacterial inhibitor gentamicin sulphate (GS) in concert with human epidermal growth factor (rhEGF); an accelerator of wound healing. GS containing Eudragit was electrospun to yield nanofiber scaffolds, which were further modified by covalent immobilization of rhEGF to their surface...
October 7, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28969895/three-dimensional-hydrogel-culture-conditions-promote-the-differentiation-of-human-induced-pluripotent-stem-cells-into-hepatocytes
#13
Ying Luo, Cheng Lou, Sui Zhang, Zhengyan Zhu, Qianzhe Xing, Peng Wang, Tong Liu, Hui Liu, Chenglong Li, Wenxia Shi, Zhi Du, Yingtang Gao
BACKGROUND AIMS: Human induced pluripotent stem cells (hiPSCs) are becoming increasingly popular in research endeavors due to their potential for clinical application; however, such application is challenging due to limitations such as inferior function and low induction efficiency. In this study, we aimed to establish a three-dimensional (3D) culture condition to mimic the environment in which hepatogenesis occurs in vivo to enhance the differentiation of hiPSCs for large-scale culture and high throughput BAL application...
September 29, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28969554/nanofibers-an-effective-tool-for-controlled-and-sustained-drug-delivery
#14
Amandeep Singh, Goutam Rath, Amit Kumar Goyal
Electrospun nonwoven nanofibers are emerging as a novel carrier for verity of drugs meant for treatment of infections, disorders and tissue engineering scaffolds. These systems may used widely in controlled release of drug that are beneficial for the health management. Nonwoven structures may provide great surface area, absorbable, simplistic processing and economical. For water loving small molecule drugs, their high water solubility and poor partition and compatibility issues with polymers make it long term release yet more challenging...
October 2, 2017: Current Drug Delivery
https://www.readbyqxmd.com/read/28967299/a-new-electrospun-graphene-silk-fibroin-composite-scaffolds-for-guiding-schwann-cells
#15
Yahong Zhao, Jiahuan Gong, Changmei Niu, Ziwei Wei, Jiaqi Shi, Guohui Li, Yumin Yang, Hongbo Wang
Graphene (Gr) has been made of various forms used for repairing peripheral nerve injury with favorable electroactivity, however, graphene-based scaffolds in peripheral nerve regeneration are still rarely reported due to the difficulty of realizing uniform dispersion of graphene and electroactive materials at nanoscale as well as lacking biocompatibility. In this paper, graphene-silk fibroin (SF) composite nanofiber membranes with different mass ratios were prepared via electrospinning. Microscopic observation revealed that electrospun Gr/SF membranes had a nanofibrous structure...
September 30, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28963019/an-epigenetic-bioactive-composite-scaffold-with-well-aligned-nanofibers-for-functional-tendon-tissue-engineering
#16
Can Zhang, Xianliu Wang, Erchen Zhang, Long Yang, Huihua Yuan, Wenjing Tu, Huilan Zhang, Zi Yin, Weiliang Shen, Xiao Chen, Yanzhong Zhang, Hongwei Ouyang
Poor tendon repair is often a clinical challenge due to the lack of ideal biomaterials. Electrospun aligned fibers, resembling the ultrastructure of tendon, have been previously reported to promote tenogenesis. However, the underlying mechanism is unclear and the aligned fibers alone are not capable enough to commit teno-differentiation of stem cells. Here, based on our observation of reduced expression of histone deacetylases (HDACs) in tendon stem/progenitor cells (TSPCs) cultured on aligned fibers, we proposed a strategy to enhance the tenogenesis effect of aligned fibers by using a small molecule Trichostatin A (TSA), an HDAC inhibitor...
September 26, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28962783/nanofibrous-polysaccharide-hydroxyapatite-composites-with-biocompatibility-against-human-osteoblasts
#17
Petra Gašparič, Manja Kurečič, Rupert Kargl, Uroš Maver, Lidija Gradišnik, Silvo Hribernik, Karin Stana Kleinschek, Majda Sfiligoj Smole
Regenerative medicine has a high demand for defined scaffold materials that promote cell growth, stabilize the tissue during maturation and provide a proper three dimensional structure that allows the exchange of nutrients. In many instances nanofiber composites have already shown their potential for such applications. This work elaborates the development of polysaccharide based nanofibers with integrated hydroxyapatite nanoparticles. A detailed study on the formation of electrospun nanofibres from aqueous mixtures of carboxymethyl cellulose polyethylene oxide was performed...
December 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28962770/in-vitro-and-in-vivo-evaluation-of-effectiveness-of-a-novel-tempo-oxidized-cellulose-nanofiber-silk-fibroin-scaffold-in-wound-healing
#18
Anha Afrin Shefa, Jhaleh Amirian, Hoe Jin Kang, Sang Ho Bae, Hae-Il Jung, Hwan-Jun Choi, Sun Young Lee, Byong-Taek Lee
In this study, a novel TEMPO-oxidized cellulose nanofiber (TOCN)-silk fibroin scaffold was prepared using a cost effective freeze drying method. Fundamental physical characterizations were carried out by scanning electron microscopy (SEM), pore diameter determination, FT-IR. PBS uptake behavior of the scaffold showed that, silk fibroin can enhance the swelling capacity of TOCN. L929 primary fibroblast cell was selected for in vitro studies, which showed that the scaffolds facilitated growth of cells. In vivo evaluation of TOCN, TOCN-silk fibroin composites was examined using critical sized rat skin excisional model for one and two weeks...
December 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28961518/modulus-of-elasticity-of-randomly-and-aligned-polymeric-scaffolds-with-fiber-size-dependency
#19
Jun Wang, Bo Yuan, Ray P S Han
The stiffness of a nano-fibrous scaffold is generally enhanced due to the size-dependency of the thin nanofibers contained in the scaffold. We proposed a model that incorporates size-dependency of single nanofibers to predict the scaffold effective modulus, in which the fibers' random or orientation distribution are considered. In the model the fiber segments between rigid fiber-fiber bonds can be stretching, shearing and bending. Using deformation energy equilibrium between sum of individual fibers and the plate of nano-fibrous scaffold, the scaffold effective modulus was derived explicitly...
September 20, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28944761/biodegradable-zein-polydopamine-polymeric-scaffold-impregnated-with-tio2-nanoparticles-for-skin-tissue-engineering
#20
S Babitha, Purna Sai Korrapati
Polymers from renewable resources are attractive for various industrial and biomedical applications owing to their compatibility, degradability, ease of use and availability. Rapid progress in the development of nanotechnology has improved the characteristic features of polymers in composite materials by reinforcing the nanosized particulates during fabrication. In this study, we have attempted to incorporate metal oxide nanoparticles into polymeric nanofibers in order to enhance the overall properties of the composite scaffold...
September 25, 2017: Biomedical Materials
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