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https://www.readbyqxmd.com/read/29242993/promotion-of-neuronal-regeneration-by-using-self-polymerized-dendritic-polypeptide-scaffold-for-spinal-cord-tissue-engineering
#1
Jun Ming Wan, Liang le Liu, Jian Fang Zhang, Jian Wei Lu, Qi Li
Tissue engineering technology is applicable for study of nerve regeneration after spinal cord injury. Many natural and artificial scaffold are not applicable because of poor mechanical properties and cell compatibility. Polypeptides with fine three-dimensional structure and cell compatibility and are widely used in tissue engineering research. The purpose of this study was to verify the neuronal differentiation of neural stem cells by using self-polymerize dendritic polypeptide for spinal cord tissue engineering...
December 14, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29241367/differentiation-of-conjunctiva-mesenchymal-stem-cells-into-secreting-islet-beta-cells-on-plasma-treated-electrospun-nanofibrous-scaffold
#2
Samad Nadri, Ghasem Barati, Hossein Mostafavi, Abdolreza Esmaeilzadeh, Seyed Ehsan Enderami
Transplantation of stem cells using biocompatible nanofibrous scaffolds is a promising therapeutic method for treating Diabetic Mellitus. The aim of this study was to derive insulin-producing cells (IPCs) from conjunctiva-derived mesenchymal stem cell (CJMSCs) and to compare the functionality of differentiated IPCs in a three-dimensional (3D) culture with 2D. Furthermore, the effects of hydrophobicity of scaffold on IPCs differentiation were examined. Scanning electron microscopy (SEM), quantitative real times PCR (qPCR), Immunostaining and flow cytometry were used to analyze fabricated scaffold and the presence of IPCs...
December 14, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29210522/emerging-roles-of-electrospun-nanofibers-in-cancer-research
#3
REVIEW
Shixuan Chen, Sunil Kumar Boda, Surinder K Batra, Xiaoran Li, Jingwei Xie
This article reviews the recent progress of electrospun nanofibers in cancer research. It begins with a brief introduction to the emerging potential of electrospun nanofibers in cancer research. Next, a number of recent advances on the important features of electrospun nanofibers critical for cancer research are discussed including the incorporation of drugs, control of release kinetics, orientation and alignment of nanofibers, and the fabrication of 3D nanofiber scaffolds. This article further highlights the applications of electrospun nanofibers in several areas of cancer research including local chemotherapy, combinatorial therapy, cancer detection, cancer cell capture, regulation of cancer cell behavior, construction of in vitro 3D cancer model, and engineering of bone microenvironment for cancer metastasis...
December 6, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29208285/hybrid-nanofibers-based-on-poly-caprolactone-gelatin-hydroxyapatite-nanoparticles-loaded-doxycycline-effective-anti-tumoral-and-antibacterial-activity
#4
Ricardo Ramírez-Agudelo, Karina Scheuermann, Alfonso Gala-García, Ana Paula F Monteiro, Ana Delia Pinzón-García, Maria E Cortés, Rubén D Sinisterra
Cancer is one of the leading causes of morbidity and mortality Worldwide, 19.3 million new cancer cases are expected to be identified in 2025. Among the therapeutic arsenal to cancer control one could find the Doxycycline and the nano hydroxyapatite. The Doxycycline (Dox) not only shown antibiotic effect but also exhibits a wide range of pleiotropic therapeutic properties as the control of the invasive and metastatic cancer cells characteristics. The purpose of the present study was to evaluate both cytotoxicity in vitro and antibacterial activity of electrospun Dox-loaded hybrid nanofibrous scaffolds composed by hydroxyapatite nanoparticles (nHA), poly-ε-caprolactone (PCL) and gelatin (Gel) polymers...
February 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29208270/nano-fibrous-and-ladder-like-multi-channel-nerve-conduits-degradation-and-modification-by-gelatin
#5
Sheng Liu, Xiumin Sun, Tao Wang, Shihao Chen, Chen-Guang Zeng, Gaoyi Xie, Qingtang Zhu, Xiaolin Liu, Daping Quan
We recently fabricated multi-channel PLLA nerve conduits (NCs, conduits diameter: ~3mm, channels diameter: ~200μm) with nano-fibrous microstructure (NNCs) and ladder-like microstructure (LNCs), and found the nanofibers in the NNCs promote differentiation of nerve stem cells (NSCs) into neurons. In the present study, we evaluated the degradation profile of NNCs and LNCs, and observed that NNCs degraded too fast to implant. To delay the degradation and retain the nano-scale effect of NNCs, we used gelatin to wrap (2% w/v gelatin) or embed (8% w/v gelatin) NNCs and LNCs via vacuum infusion and chemical cross-linking with genipin...
February 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29207038/interaction-of-ipsc-derived-neural-stem-cells-on-poly-l-lactic-acid-nanofibrous-scaffolds-for-possible-use-in-neural-tissue-engineering
#6
Chengkai Lin, Chang Liu, Liangming Zhang, Zhi Huang, Peipei Zhao, Ruiqiang Chen, Mao Pang, Zhenxiang Chen, Liumin He, Chunxiao Luo, Limin Rong, Bin Liu
Tissue engineering is a rapidly growing technological area for the regeneration and reconstruction of damage to the central nervous system. By combining seed cells with appropriate biomaterial scaffolds, tissue engineering has the ability to improve nerve regeneration and functional recovery. In the present study, mouse induced pluripotent stem cells (iPSCs) were generated from mouse embryonic fibroblasts (MEFs) with the non-integrating episomal vectors pCEP4-EO2S-ET2K and pCEP4-miR-302-367 cluster, and differentiated into neural stem cells (NSCs) as transplanting cells...
November 30, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29197591/enhanced-chondrogenesis-of-human-bone-marrow-mesenchymal-stem-cell-bmsc-on-nanofiber-based-polyethersulfone-pes-scaffold
#7
Hossein Mahboudi, Bahram Kazemi, Masoud Soleimani, Hana Hanaee-Ahvaz, Hossein Ghanbarian, Mojgan Bandehpour, Seyed Ehsan Enderami, Mousa Kehtari, Ghasem Barati
Mesenchymal stem cells (MSC) from bone marrow hold great potential as a cell source for cartilage repair. The objective of our study was differentiation of MSC toward chondrocyte by using Nanofiber-based polyethersulfone (PES) scaffold and also enhanced chondrogenic differentiation of BMSC in vitro. MSCs were harvested from bone marrow of human and PES scaffold was fabricated via Electrospinning. The isolated cells were cultured on the PES scaffold and scaffold free method. After 21days, Real-time PCR was performed to evaluate the cartilage-specific genes in the mRNA levels...
November 29, 2017: Gene
https://www.readbyqxmd.com/read/29193687/in-vitro-and-in-vivo-biological-characterization-of-poly-lactic-acid-fiber-scaffolds-synthesized-by-air-jet-spinning
#8
Marco Vladimir Granados-Hernández, Janeth Serrano-Bello, Juan José Montesinos, Carlos Alvarez-Gayosso, Luis Alberto Medina-Velázquez, Octavio Alvarez-Fregoso, Marco Antonio Alvarez-Perez
Poly(lactic acid) (PLA) is one of the most promising renewable and biodegradable polymers for mimic extracellular matrix for tissue engineering applications. In this work, PLA spun membrane scaffold were successfully prepared by air jet spinning technology. Morphology, mechanical properties, in vitro biocompatibility, and in vitro and in vivo degradation of PLA fibrous scaffold were characterized by X-ray diffraction, Fourier Transform Infrared, and scanning electron microscope (SEM). Morphological results assessed by SEM analyses indicated that PLA scaffolds possessed an average fiber diameter of approximately 0...
November 30, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29190463/genipin-treated-chitosan-nanofibers-as-a-novel-scaffold-for-nerve-guidance-channel-design
#9
Yu-Ting Lau, Lam-Fung Kwok, Kin-Wai Tam, Ying-Shing Chan, Daisy Kwok-Yan Shum, Graham Ka-Hon Shea
Schwann cell-seeded nerve guidance channels are designed to assist post-traumatic nerve regeneration in the PNS. Chitosan is a natural polymer well suited for tissue engineering as it is biocompatible, non-immunogenic, and biodegradable. Electrospun chitosan nanofibers utilized in nerve guidance channels have the capacity for guiding axonal growth within the channel lumen yet are limited in their capacity to maintain structural integrity within physiological environments. To address this, we attempted genipin crosslinking of chitosan nanofibers...
November 23, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29169271/differentiation-of-mesenchymal-stem-cells-into-neuron-like-cells-using-composite-3d-scaffold-combined-with-valproic-acid-induction
#10
Sadegh Ghorbani, Taki Tiraihi, Masoud Soleimani
The nervous system has little capacity for self-repair after injury because neurons cannot proliferate owing to lack of suitable microenvironment. Therefore, neural tissue engineering that combines neural stem, scaffolds, and growth factors may improve the chance of restoration of damaged neural tissues. A favorable niche for neural regeneration would be both fibrous and electrically conductive scaffolds. Human Wharton jelly-derived mesenchymal stem cells were seeded on wet-electrospun 3D scaffolds composed of poly lactic acid coated with natural polymers including alginate and gelatin, followed by a multi-wall carbon nanotube coating...
January 1, 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29168916/fabrication-characterization-and-biocompatibility-assessment-of-a-novel-elastomeric-nanofibrous-scaffold-a-potential-scaffold-for-soft-tissue-engineering
#11
Elham Shamirzaei Jeshvaghani, Laleh Ghasemi-Mobarakeh, Reza Mansurnezhad, Fatemeh Ajalloueian, Mahshid Kharaziha, Mohammad Dinari, Maryam Sami Jokandan, Ioannis S Chronakis
With regard to flexibility and strength properties requirements of soft biological tissue, elastomeric materials could be more beneficial in soft tissue engineering applications. The present work investigates the use of an elastic polymer, (polycaprolactone fumarate [PCLF]), for fabricating an electrospun scaffold. PCLF with number-average molecular weight of 13,284 g/mol was synthetized, electrospun PCLF:polycaprolactone (PCL) (70:30) nanofibrous scaffolds were fabricated and a novel strategy (in situ photo-crosslinking along with wet electrospinning) was applied for crosslinking of PCLF in the structure of PCLF:PCL nanofibers was presented...
November 23, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29162855/three-dimensional-honeycomb-patterned-fibrinogen-based-nanofibers-induce-substantial-osteogenic-response-of-mesenchymal-stem-cells
#12
Salima Nedjari, Firas Awaja, George Altankov
Stem cells therapy offers a viable alternative for treatment of bone disorders to the conventional bone grafting. However clinical therapies are still hindered by the insufficient knowledge on the conditions that maximize stem cells differentiation. Hereby, we introduce a novel 3D honeycomb architecture scaffold that strongly support osteogenic differentiation of human adipose derived mesenchymal stem cells (ADMSCs). The scaffold is based on electrospun hybrid nanofibers consisting of poly (L-lactide ε-caprolactone) and fibrinogen (PLCL/FBG)...
November 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29134783/electrospun-titania-fiber-mats-spin-coated-with-thin-polymer-films-as-nanofibrous-scaffolds-for-enhanced-cell-proliferation
#13
Alfin Kurniawan, Chintya Effendi, Meng-Jiy Wang
The incorporation of inorganic materials into electrospun nanofibers has recently gained considerable attention for the development of ECM-like scaffolds with improved mechanical properties and enhanced biological functions for tissue engineering applications. In this study, polymer-inorganic composite fibers consisting of poly(2-ethyl-2-oxazoline) (PEOXA) and tetrabutyl titanate (TBT) as the titanium precursor were successfully fabricated through a combined sol-gel/electrospinning approach. PEOXA/Ti(OR)n composite fibers were obtained with varying amounts of polymer and titanium precursors...
November 14, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29130836/composite-3d-printed-scaffold-with-structured-electrospun-nanofibers-promotes-chondrocyte-adhesion-and-infiltration
#14
M Rampichová, E Košt'áková Kuželová, E Filová, J Chvojka, J Šafka, M Pelcl, J Daňková, E Prosecká, M Buzgo, M Plencner, D Lukáš, E Amler
Additive manufacturing, also called 3D printing, is an effective method for preparing scaffolds with defined structure and porosity. The disadvantage of the technique is the excessive smoothness of the printed fibers, which does not support cell adhesion. In the present study, a 3D printed scaffold was combined with electrospun classic or structured nanofibers to promote cell adhesion. Structured nanofibers were used to improve the infiltration of cells into the scaffold. Electrospun layers were connected to 3D printed fibers by gluing, thus enabling the fabrication of scaffolds with unlimited thickness...
November 13, 2017: Cell Adhesion & Migration
https://www.readbyqxmd.com/read/29128535/branched-peptides-integrate-into-self-assembled-nanostructures-and-enhance-biomechanics-of-peptidic-hydrogels
#15
Raffaele Pugliese, Federico Fontana, Amanda Marchini, Fabrizio Gelain
Self-assembling peptides (SAP) have drawn an increasing interest in the tissue engineering community. They display unquestionable biomimetic properties, tailorability and promising biocompatibility. However their use has been hampered by poor mechanical properties making them fragile soft scaffolds. To increase SAP hydrogel stiffness we introduced a novel strategy based on multiple ramifications of (LDLK)3, a well-known linear SAP, connected with one or multiple "lysine knots". Differently branched SAPs were tested by increasing the number of (LDLK)3-like branches and by adding the neuro-regenerative functional motif BMHP1 as a single branch...
November 8, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29120601/light-responsive-silk-nanofibers-an-optochemical-platform-for-environmental-applications
#16
Maria E Genovese, Gianvito Caputo, Gabriele Nanni, Chiara Setti, Matteo Bustreo, Giovanni Perotto, Athanassia Athanassiou, Despina Fragouli
Photochromic spiropyran-doped silk fibroin poly(ethylene oxide) nanofibers which combine the attractive properties and biocompatibility of silk with the photocontrollable and reversible optical, mechanical, and chemical response of the spiropyran dopants are herein presented. As proved, the reversible variation of the absorption and emission signals of the mats and of their Young's modulus upon alternate UV and visible light irradiation is ascribed to the reversible photoconversion of the spiropyran form to its polar merocyanine counterpart...
November 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29119355/preparation-of-electrospun-core-sheath-yarn-with-enhanced-bioproperties-for-biomedical-materials
#17
Boyu Li, Chengkun Liu, Fenglei Zhou, Xue Mao, Runjun Sun
OBJECTIVES: To create a multifunctional medical material that combines the advantages of both nanofibers and macroyarns. RESULTS: A novel electrospinning-based approach was developed for creating polycaprolactone (PCL) nanofiber covered yarns (PCL-NCYs) in which polyglycolic acid multi-strand filaments (PGA-MFs) were used as the core. BALB/3T3 (mouse embryonic fibroblast cell line) cells were cultured on the PCL-NCYs substrate and cell morphology and proliferation were determined by methylthiazol tetrazolium (MTT) assay...
November 8, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/29098078/simulation-of-ecm-with-silk-and-chitosan-nanocomposite-materials
#18
Z Z Ding, J Ma, W He, Z L Ge, Q Lu, D L Kaplan
Extracellular matrix (ECM) is a system used to model the design of biomaterial matrices for tissue regeneration. Various biomaterial systems have been developed to mimic the composition or microstructure of the ECM. However, emulating multiple facets of the ECM in these systems remains a challenge. Here, a new strategy is reported which addresses this need by using silk fibroin and chitosan (CS) nanocomposite materials. Silk fibroin was first assembled into ECM-mimetic nanofibers in water and then blended with CS to introduce the nanostructural cues...
June 28, 2017: Journal of Materials Chemistry. B, Materials for Biology and Medicine
https://www.readbyqxmd.com/read/29092483/a-switchable-positive-and-negative-air-pressure-device-for-efficient-and-gentle-handling-of-nanofiber-scaffolds
#19
Nathan A Hotaling, Vladimir Khristov, Arvydas Maminishkis, Kapil Bharti, Carl G Simon
A scaffold handling device (SHD) has been designed that can switch from gentle suction to positive pressure to lift and place nanofiber scaffolds. In tissue engineering laboratories, delicate fibrous scaffolds, such as electrospun nanofiber scaffolds, are often used as substrates for cell culture. Typical scaffold handling procedures include lifting the scaffolds, moving them from one container to another, sterilization, and loading scaffolds into cell culture plates. Using tweezers to handle the scaffolds can be slow, can damage the scaffolds, and can cause them to wrinkle or fold...
October 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29084180/laminin-coated-poly-methyl-methacrylate-pmma-nanofiber-scaffold-facilitates-the-enrichment-of-skeletal-muscle-myoblast-population
#20
Nor Kamalia Zahari, Ruszymah Binti Haji Idrus, Shiplu Roy Chowdhury
Myoblasts, the contractile cells of skeletal muscle, have been invaluable for fundamental studies of muscle development and clinical applications for muscle loss. A major limitation to the myoblast-based therapeutic approach is contamination with non-contractile fibroblasts, which overgrow during cell expansion. To overcome these limitations, this study was carried out to establish a 3D culture environment using nanofiber scaffolds to enrich the myoblast population during construct formation. Poly(methyl methacrylate) (PMMA) nanofiber (PM) scaffolds were fabricated using electrospinning techniques and coated with extracellular matrix (ECM) proteins, such as collagen or laminin, in the presence or absence of genipin...
October 30, 2017: International Journal of Molecular Sciences
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