keyword
MENU ▼
Read by QxMD icon Read
search

Hydrogel

keyword
https://www.readbyqxmd.com/read/28549864/hyaluronan-hydrogels-with-a-low-degree-of-modification-as-scaffolds-for-cartilage-engineering
#1
Annalisa La Gatta, Giulia Ricci, Antonietta Stellavato, Marcella Cammarota, Rosanna Filosa, Agata Papa, Antonella D'Agostino, Marianna Portaccio, Ines Delfino, Mario De Rosa, Chiara Schiraldi
In the field of cartilage engineering, continuing efforts have focused on fabricating scaffolds that favor maintenance of the chondrocytic phenotype and matrix formation, in addition to providing a permeable, hydrated, microporous structure and mechanical support. The potential of hyaluronan-based hydrogels has been well established, but the ideal matrix remains to be developed. This study describes the development of hyaluronan sponges-based scaffolds obtained by lysine methyl-ester crosslinking. The reaction conditions are optimized with minimal chemical modifications to obtain materials that closely resemble elements in physiological cellular environments...
May 23, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28547848/effect-of-ceramic-calcium-phosphorus-ratio-on-chondrocyte-mediated-biosynthesis-and-mineralization
#2
Margaret K Boushell, Nora T Khanarian, Raquel Z LeGeros, Helen H Lu
The osteochondral interface functions as a structural barrier between cartilage and bone, maintaining tissue integrity post injury and during homeostasis. Regeneration of this calcified cartilage region is thus essential for integrative cartilage healing, and hydrogel-ceramic composite scaffolds have been explored for calcified cartilage formation. The objective of this study is to test the hypothesis that Ca/P ratio of the ceramic phase of the composite scaffold regulates chondrocyte biosynthesis and mineralization potential...
May 25, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28547817/recent-advances-in-metal-containing-polymer-hydrogels
#3
REVIEW
Hui Li, Peng Yang, Parasmani Pageni, Chuanbing Tang
Metal-containing polymer hydrogels have attracted increasing interest in recent years due to their outstanding properties such as biocompatibility, recoverability, self-healing, and/or redox activity. In this short review, methods for the preparation of metal-containing polymer hydrogels are introduced and an overview of these hydrogels with various functionalities is given. It is hoped that this short update can stimulate innovative ideas to promote the research of metal-containing hydrogels in the communities...
May 26, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28545971/development-and-characterization-of-nanostructured-lipid-carriers-based-chitosan-thermosensitive-hydrogel-for-delivery-of-dexamethasone
#4
Guoxin Tan, Shihui Yu, Jinyu Li, Weisan Pan
This study aims to explore a novel composite thermosensitive in situ gelling formulation which the nanostructured lipid carriers (NLC) was incorporated into hydroxypropyltrimethyl ammonium chloride chitosan (HACC)-based hydrogels, and the resulting formulation investigated for its potential to act as a potential sustained ocular delivery system. NLC formulation loaded with dexamethasone (DXM) were prepared using the melt-emulsification method. The particle size, zeta potential, encapsulation efficiency, and morphological properties of the NLC were characterized...
May 22, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28544779/a-brief-review-of-extrusion-based-tissue-scaffold-bio-printing
#5
REVIEW
Liqun Ning, Xiongbiao Chen
Extrusion-based bio-printing has great potential as a technique for manipulating biomaterials and living cells to create three-dimensional (3D) scaffolds for damaged tissue repair and function restoration. Over the last two decades, advances in both engineering techniques and life sciences have evolved extrusion-based bio-printing from a simple technique to one able to create diverse tissue scaffolds from a wide range of biomaterials and cell types. However, the complexities associated with synthesis of materials for bio-printing and manipulation of multiple materials and cells in bio-printing pose many challenges for scaffold fabrication...
May 24, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28544701/intradiscal-application-of-a-pcla-peg-pcla-hydrogel-loaded-with-celecoxib-for-the-treatment-of-back-pain-in-canines-what-s-in-it-for-humans
#6
Anna R Tellegen, Nicole Willems, Martijn Beukers, Guy C M Grinwis, Saskia G M Plomp, Clemens Bos, Maarten van Dijk, Mike de Leeuw, Laura B Creemers, Marianna A Tryfonidou, Björn P Meij
Chronic low back pain is a common clinical problem in both the human and canine population. Current pharmaceutical treatment often consists of oral anti-inflammatory drugs to alleviate pain. Novel treatments for degenerative disc diseases focus on local application of sustained released drug formulations. The aim of this study was to determine safety and feasibility of intradiscal application of a PCLA-PEG-PCLA hydrogel releasing celecoxib, a COX-2 inhibitor. Biocompatibility was evaluated after subcutaneous injection in mice and safety of intradiscal injection of the hydrogel was evaluated in experimental dogs with early spontaneous intervertebral disc (IVD) degeneration...
May 19, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28544680/multiscale-modulation-of-nanocrystalline-cellulose-hydrogel-via-nanocarbon-hybridization-for-3d-neuronal-bilayer-formation
#7
Dongyoon Kim, Subeom Park, Insu Jo, Seong-Min Kim, Dong Hee Kang, Sung-Pyo Cho, Jong Bo Park, Byung Hee Hong, Myung-Han Yoon
Bacterial biopolymers have drawn much attention owing to their unconventional three-dimensional structures and interesting functions, which are closely integrated with bacterial physiology. The nongenetic modulation of bacterial (Acetobacter xylinum) cellulose synthesis via nanocarbon hybridization, and its application to the emulation of layered neuronal tissue, is reported. The controlled dispersion of graphene oxide (GO) nanoflakes into bacterial cellulose (BC) culture media not only induces structural changes within a crystalline cellulose nanofibril, but also modulates their 3D collective association, leading to substantial reduction in Young's modulus (≈50%) and clear definition of water-hydrogel interfaces...
May 22, 2017: Small
https://www.readbyqxmd.com/read/28544647/dual-cross-linked-biofunctional-and-self-healing-networks-to-generate-user-defined-modular-gradient-hydrogel-constructs
#8
Zhao Wei, Daniel M Lewis, Yu Xu, Sharon Gerecht
Gradient hydrogels have been developed to mimic the spatiotemporal differences of multiple gradient cues in tissues. Current approaches used to generate such hydrogels are restricted to a single gradient shape and distribution. Here, a hydrogel is designed that includes two chemical cross-linking networks, biofunctional, and self-healing networks, enabling the customizable formation of modular gradient hydrogel construct with various gradient distributions and flexible shapes. The biofunctional networks are formed via Michael addition between the acrylates of oxidized acrylated hyaluronic acid (OAHA) and the dithiol of matrix metalloproteinase (MMP)-sensitive cross-linker and RGD peptides...
May 23, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28544472/engineering-muscle-cell-alignment-through-3d-bioprinting
#9
Pamela Mozetic, Sara Maria Giannitelli, Manuele Gori, Marcella Trombetta, Alberto Rainer
Processing of hydrogels represents a main challenge for the prospective application of additive manufacturing (AM) to soft tissue engineering. Furthermore, direct manufacturing of tissue precursors with a cell density similar to native tissues has the potential to overcome the extensive in vitro culture required for conventional cell-seeded scaffolds seeking to fabricate constructs with tailored structural and functional properties. In this work, we present a simple AM methodology that exploits the thermoresponsive behavior of a block copolymer (Pluronic®) as a means to obtain good shape retention at physiological conditions and to induce cellular alignment...
May 22, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28544434/strain-stiffening-hydrogels-through-self-assembly-and-covalent-fixation-of-semi-flexible-fibers
#10
Rint P Sijbesma, Marcos Fernandez-Castano Romera, Clément Guibert, Ilja K Voets, Cornelis Storm
Biomimetic, strain-stiffening materials are reported, made through self-assembly and covalent fixation of small building blocks to form fibrous hydrogels able to stiffen by an order of magnitude in response to applied stress. The gels consist of semi-flexible rodlike micelles of bisurea bolaamphiphiles with oligo(ethylene oxide) (EO) outer blocks and a polydiacetylene (PDA) backbone. The micelles are fibers composed of 9-10 ribbons. A gelation method based on Cu-catalyzed azide-alkyne cycloaddition (CuAAC) was developed that leads to strain-stiffening hydrogels with unusual yet universal linear and nonlinear stress-strain response...
May 24, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28544261/mechanical-properties-structure-bioadhesion-and-biocompatibility-of-pectin-hydrogels
#11
Pavel A Markov, Nikita S Krachkovsky, Eugene A Durnev, Ekaterina A Martinson, Sergey G Litvinets, Sergey V Popov
The surface structure, biocompatibility, textural and adhesive properties of calcium hydrogels derived from 1, 2 and 4% solutions of apple pectin were examined in this study. An increase in the pectin concentration in hydrogels was shown to improve their stability toward elastic and plastic deformation. The elasticity of pectin hydrogels, measured as Young's modulus, ranged from 6 to 100 kPa. The mechanical properties of the pectin hydrogels were shown to correspond to those of soft tissues. The characterization of surface roughness in terms of the roughness profile (Ra) and the root-mean-square deviation of the roughness profile (Rq) indicated an increased roughness profile for hydrogels depending on their pectin concentration...
May 22, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28543172/nanoparticles-as-new-tools-for-inhibition-of-cancer-angiogenesis
#12
REVIEW
Nasser Hashemi Goradel, Farshid Ghiyami Hoor, Samira Jahangiri, Babak Negahdari, Amirhossein Sahebkar, Aria Masoudifar, Hamed Mirzaei
Angiogenesis is known as one of the hallmarks of cancer. Multiple lines evidence indicated that vascular endothelium growth factor (VEGF) is a key player in the progression of angiogenesis and exerts its functions via interaction with tyrosine kinase receptors (TKRs). These receptors could trigger a variety of cascades that lead to the supply of oxygen and nutrients to tumor cells and survival of these cells. With respect to pivotal role of angiogenesis in the tumor growth and survival, finding new therapeutic approaches via targeting angiogenesis could open a new horizon in cancer therapy...
May 25, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28541940/efficient-removal-of-cd-2-ion-from-water-by-calcium-alginate-hydrogel-filtration-membrane
#13
Ye Li, Kongyin Zhao, Wei Yang, Guanyi Chen, Xinxin Zhang, Yujie Zhao, Liang Liu, Min Chen
Calcium alginate (CaAlg) hydrogel filtration membrane was prepared using urea as pore-forming agent. The effects of preparation and operating conditions on the removal rate of Cd(2+) were researched. The removal mechanism of Cd(2+) and the anti-fouling property of CaAlg membrane were investigated. The removal rate of the CaAlg filtration membrane reached over 99.5% within 120 min when 20 mg/L Cd(2+) was used, and the flux was 15.5 L/m(2)h at 0.1 MPa when the thickness of the membrane was 0.28 ± 0.08 mm. However, the removal rate of Cd(2+) was below 10...
May 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28541144/in-vitro-characterization-of-a-formulation-of-butorphanol-tartrate-in-a-poloxamer-407-base-intended-for-use-as-a-parenterally-administered-slow-release-analgesic-agent
#14
Delphine Laniesse, Dale A Smith, Heather K Knych, Cornelia Mosley, David Sanchez-Migallon Guzman, Hugues Beaufrère
OBJECTIVE To assess rheological properties and in vitro diffusion of poloxamer 407 (P407) and butorphanol-P407 (But-P407) hydrogels and to develop a sustained-release opioid formulation for use in birds. SAMPLE P407 powder and a commercially available injectable butorphanol tartrate formulation (10 mg/mL). PROCEDURES P407 and But-P407 gels were compounded by adding water or butorphanol to P407 powder. Effects of various concentrations of P407 (20%, 25% and 30% [{weight of P407/weight of diluent} × 100]), addition of butorphanol, and sterilization through a microfilter on rheological properties of P407 were measured by use of a rheometer...
June 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28540502/developing-transdermal-applications-of-ketorolac-tromethamine-entrapped-in-stimuli-sensitive-block-copolymer-hydrogels
#15
Mireia Mallandrich, Francisco Fernández-Campos, Beatriz Clares, Lyda Halbaut, Cristina Alonso, Luisa Coderch, Maria L Garduño-Ramírez, Berenice Andrade, Alfonso Del Pozo, Majella E Lane, Ana C Calpena
PURPOSE: In order to obtain dermal vehicles of ketorolac tromethamine (KT) for the local treatment of inflammation and restrict undesirable side effects of systemic levels hydrogels (HGs) of poloxamer and carbomer were developed. METHODS: KT poloxamer based HG (KT-P407-HG) and KT carbomer based HG (KT-C940-HG) were elaborated and characterized in terms of swelling, degradation, porosity, rheology, stability, in vitro release, ex vivo permeation and distribution skin layers...
May 24, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28540461/quantitative-analysis-of-curcumin-loaded-alginate-nanocarriers-in-hydrogels-using-raman-and-attenuated-total-reflection-infrared-spectroscopy
#16
Lynda Miloudi, Franck Bonnier, Dominique Bertrand, Hugh J Byrne, Xavier Perse, Igor Chourpa, Emilie Munnier
Core-shell nanocarriers are increasingly being adapted in cosmetic and dermatological fields, aiming to provide an increased penetration of the active pharmaceutical or cosmetic ingredients (API and ACI) through the skin. In the final form, the nanocarriers (NC) are usually prepared in hydrogels, conferring desired viscous properties for topical application. Combined with the high chemical complexity of the encapsulating system itself, involving numerous ingredients to form a stable core and quantifying the NC and/or the encapsulated active without labor-intensive and destructive methods remains challenging...
May 25, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28539887/biomaterials-for-local-controlled-drug-delivery-to-the-injured-spinal-cord
#17
REVIEW
Alexis M Ziemba, Ryan J Gilbert
Affecting approximately 17,000 new people each year, spinal cord injury (SCI) is a devastating injury that leads to permanent paraplegia or tetraplegia. Current pharmacological approaches are limited in their ability to ameliorate this injury pathophysiology, as many are not delivered locally, for a sustained duration, or at the correct injury time point. With this review, we aim to communicate the importance of combinatorial biomaterial and pharmacological approaches that target certain aspects of the dynamically changing pathophysiology of SCI...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28539658/functional-compressive-mechanics-and-tissue-biocompatibility-of-an-injectable-sf-pu-hydrogel-for-nucleus-pulposus-replacement
#18
Jingen Hu, Yang Lu, Ling Cai, Kwabena Gyabaah Owusu-Ansah, Gewen Xu, Feilong Han, Junjie Bao, Xiangjin Lin, Yiping Huang
In spinal degenerative disease, an injectable liquid hydrogel can fill in defect entirely, lessen the danger of implant relocation and following loss of disc height, minimizing the operative trauma. Here, we propose an injectable in-situ chemically cross-linked hydrogel by a two-component reaction of liquid silk fibroin with liquid polyurethane at physiological temperature conditions. Confined compression tests and fatigue tests were reported to assess physical properties of the hydrogel. Impact of different diameter on the biomechanical behaviours was tested to evaluate the clinical potentiality of the hydrogel for replacing nucleus pulposus...
May 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28539292/-gelatin-alginate-hydrogel-scaffolds-prepared-by-3d-bioprinting-promotes-cell-adhesion-and-proliferation-of-human-dental-pulp-cells-in-vitro
#19
Hai-Yue Yu, Dan-Dan Ma, Bu-Ling Wu
OBJECTIVE: To evaluate the cytotoxicity of gelatin/alginate hydrogel scaffolds prepared by 3D bioprinting in human dental pulp cells (HDPCs) and compare the cell adhesion and proliferation of the cells seeded in the biomaterial using two different methods. METHODS: HDPCs isolated by tissue block culture and enzyme digestion were cultured and passaged. Gelatin/alginate hydrogel scaffolds were printed using a bioplotter, and the cytotoxicity of the aqueous extracts of the scaffold material was tested in the third passage of HDPCs using cell counting kit-8...
May 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28539099/selectivity-and-localization-of-lysozyme-uptake-in-contemporary-hydrogel-contact-lens-materials
#20
Miriam Heynen, Negar Babaei Omali, Zohra Fadli, Chantal Coles-Brennan, Lakshman N Subbaraman, Lyndon Jones
The purpose of this study was to investigate the early and selective uptake of lysozyme and the location of deposited lysozyme on contemporary hydrogel contact lens (CL) materials after exposure to an artificial tear solution (ATS) for 16 hours. Seven different hydrogel CL materials [polymacon, omafilcon A, nelfilcon A, nesofilcon A, ocufilcon B, etafilcon A (Acuvue Moist), and etafilcon A (Acuvue Define)] were incubated in an ATS for various times. Total protein deposition was determined using a modified Bradford technique...
May 25, 2017: Journal of Biomaterials Science. Polymer Edition
keyword
keyword
6141
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"