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Hyaluronic acid

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https://www.readbyqxmd.com/read/29693373/fabrication-of-self-healing-hydrogel-with-on-demand-antimicrobial-activity-and-sustained-biomolecules-release-for-infected-skin-regeneration
#1
Ran Tian, Xinyu Qiu, Pingyun Yuan, Kai Lei, Lin Wang, Yongkang Bai, Shiyu Liu, Xin Chen
Microbial infection has been considered as one of the most critical challenges in bioengineering applications especially in tissue regeneration, which engender severe threat to public health. Herein, a hydrogel performing properties of rapid self-healing, on-demand antibiosis and controlled cargo release were fabricated by a simple assembly of Fe complex as crosslinker and hyaluronic acid as gel network. This hydrogel is able to locally degrade and release Fe3+ to kill bacteria as needed, due to the hyaluronidase excreted by surrounding bacteria, resulting in efficient antibacterial activity to different types of bacteria...
April 25, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29691830/stem-cells-in-osteochondral-tissue-engineering
#2
Eleonora Pintus, Matteo Baldassarri, Luca Perazzo, Simone Natali, Diego Ghinelli, Roberto Buda
Mesenchymal stem cells (MSCs) are pluripotent stem cells with the ability to differentiate into a variety of other connective tissue cells, such as chondral, bony, muscular, and tendon tissue. Bone marrow-derived MSCs are pluripotent cells that can differentiate among others into osteoblasts, adipocytes and chondrocytes.Bone marrow-derived cells may represent the future in osteochondral repair. A one-step arthroscopic technique is developed for cartilage repair, using a device to concentrate bone marrow-derived cells and collagen powder or hyaluronic acid membrane as scaffolds for cell support and platelet gel...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29691018/carboxymethyl-chitosan-gelatin-hyaluronic-acid-blended-membranes-as-epithelia-transplanting-scaffold-for-corneal-wound-healing
#3
Wenhua Xu, Zheying Wang, Ying Liu, Liping Wang, Zhiwen Jiang, Tong Li, Wenhua Zhang, Ye Liang
There is an unmet need for an optimal scaffold as cell transplantation carrier to induce corneal reconstruction. In this study, a blend membrane was prepared with carboxymethyl chitosan (CMCTS), gelatin, and hyaluronic acid. To investigate its cytocompatibility, primary rabbit corneal epithelial cells (CEpCs) were seeded on it and growth and proliferation were evaluated. The blend membrane was found to be transparent, biodegradable, and suitable for CEpCs attachment and proliferation, which could maintain the epithelial cell-like protein expression of CEpCs...
July 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29691005/evaluation-of-magnetic-nanoparticles-influence-on-hyaluronic-acid-production-from-streptococcus-equi
#4
Yasser A Attia, Mohamed I Kobeasy, Mohamed Samer
This work aims at developing a novel hyaluronic acid (HA) production method using magnetic nanoparticles (NPs). In a separate process, HA was produced with the addition of the amino acids (AA) as bio-additives. Regarding the NPs additives, the results showed that the highest dry weight of the produced HA was 0.264 g/l with the addition of 20 mg/l of Fe3 O4 NPs. Concerning the AA additives, the results showed that the highest dry weight of the produced HA was 0.079 g/l with the addition of 0.26 g/l of glutamic acid (GA) compared to the control produced 0...
July 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29689043/-treatment-of-allergic-and-vasomotor-rhinitis-the-role-of-beclomethasone-dipropionate-and-hyaluronic-acid-with-high-molecular-weight
#5
Giorgio Ciprandi, Matteo Gelardi
Inflammatory rhinitis is a very common disorder. It includes allergic rhinitis (AR) and non-allergic rhinitis (NAR). Nasal inflammation is shared by both disorders. So, anti-inflammatory treatment is indicated for both. Beclomethasone dipropionate (BDP) is a corticosteroid that is long time available both as intranasal spray and aerosol solution. BDP is a corticosteroid with proved efficacy in the treatment of rhinitis, both as spray and aerosol. Safety issue has been satisfactory explored, thus BDP is usually safe and well tolerated...
April 2018: Recenti Progressi in Medicina
https://www.readbyqxmd.com/read/29688920/mixed-treatment-comparisons-for-nonsurgical-treatment-of-knee-osteoarthritis-a-network-meta-analysis
#6
David S Jevsevar, Peter B Shores, Kyle Mullen, Danielle M Schulte, Gregory A Brown, Deborah S Cummins
INTRODUCTION: Knee osteoarthritis (KOA) is a significant health problem with lifetime risk of development estimated to be 45%. Effective nonsurgical treatments are needed for the management of symptoms. METHODS: We designed a network meta-analysis to determine clinically relevant effectiveness of nonsteroidal anti-inflammatory drugs, acetaminophen, intra-articular (IA) corticosteroids, IA platelet-rich plasma, and IA hyaluronic acid compared with each other as well as with oral and IA placebos...
May 1, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/29688780/hyaluronic-acid-synthase-2-gene-transfer-into-the-joints-of-beagles-by-use-of-recombinant-adeno-associated-viral-vectors
#7
Sirkka Kyostio-Moore, Patricia Berthelette, Cathleen Sookdeo Cornell, Bindu Nambiar, Monica Dias Figueiredo
OBJECTIVE To evaluate gene transfer of recombinant adeno-associated viral (rAAV) vectors with AAV2 or AAV5 capsid and encoding hyaluronic acid (HA) synthase-2 (HAS2) into joints of healthy dogs. ANIMALS 22 purpose-bred Beagles. PROCEDURES Plasmid expression cassettes encoding canine HAS2 (cHAS2) were assessed in vitro for concentration and molecular size of secreted HA. Thereafter, rAAV2-cHAS2 vectors at 3 concentrations and rAAV5-cHAS2 vectors at 1 concentration were each administered intra-articularly into the left stifle joint of 5 dogs; 2 dogs received PBS solution instead...
May 2018: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/29687569/physical-properties-of-a-novel-small-particle-hyaluronic-acid-filler-in-vitro-in-vivo-and-clinical-studies
#8
Sung Yeon Cho, June Whan Park, Hyoseok An, Hyun Ju Ko, Hyuk Kim, Jin Kyu Choi, Sun Young Choi, Sung Min Kim, Eun Jung Ko, Beom Joon Kim
BACKGROUND: Infraorbital region is one of the most important regions that show the signs of aging. In recent years, hyaluronic acid (HA) fillers have been used to correct this region for esthetic treatments. Although HA fillers with various physical properties are used, limited research has been performed to compare their efficacy. OBJECTIVE: We aimed to compare three HA fillers to determine which is the most appropriate filler for the correction of the infraorbital region and evaluate the correction of such by performing a clinical test using CLEVIEL Fine...
April 23, 2018: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29687335/prospective-randomized-single-masked-parallel-study-exploring-the-effects-of-a-preservative-free-ophthalmic-solution-containing-hyaluronic-acid-0-4-and-taurine-0-5-on-the-ocular-surface-of-glaucoma-patients-under-multiple-long-term-topical-hypotensive-therapy
#9
Gloria Roberti, Luca Agnifili, Francesca Berardo, Ivano Riva, Michele Figus, Gianluca Manni, Luciano Quaranta, Francesco Oddone
INTRODUCTION: To compare the effects of a preservative-free (PF) ophthalmic solution containing hyaluronic acid (HA) 0.4% and taurine (TAU) 0.5% with those of a PF ophthalmic solution containing HA 0.2% on ocular surface signs, symptoms, and morphological parameters in glaucoma patients under multiple long-term topical hypotensive therapy. METHODS: Eligible patients underwent evaluation of ocular surface parameters by ocular surface disease index (OSDI) and glaucoma symptom scale (GSS) questionnaires, breakup time test (BUT), Schirmer I test, corneal and conjunctival staining (Oxford scale), and conjunctival in vivo confocal microscopy (Heidelberg Retina Tomograph 3, Heidelberg Engineering GmbH, Heidelberg, Germany)...
April 23, 2018: Advances in Therapy
https://www.readbyqxmd.com/read/29682801/dynamic-hyaluronan-hydrogels-with-temporally-modulated-high-injectability-and-stability-using-a-biocompatible-catalyst
#10
Junzhe Lou, Fang Liu, Christopher D Lindsay, Ovijit Chaudhuri, Sarah C Heilshorn, Yan Xia
Injectable and biocompatible hydrogels have become increasingly important for cell transplantation to provide mechanical protection of cells during injection and a stable scaffold for cell adhesion post-injection. Injectable hydrogels need to be easily pushed through a syringe needle and quickly recover to a gel state, thus generally requiring noncovalent or dynamic cross-linking. However, a dilemma exists in the design of dynamic hydrogels: hydrogels with fast exchange of cross-links are easier to eject using less force, but lack long-term stability; in contrast, slow exchange of cross-links improves stability, but compromises injectability and thus the ability to protect cells under flow...
April 23, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29682180/glycogen-debranching-enzyme-agl-is-a-novel-regulator-of-non-small-cell-lung-cancer-growth
#11
Craig S Richmond, Darby Oldenburg, Garrett Dancik, David R Meier, Benjamin Weinhaus, Dan Theodorescu, Sunny Guin
Glycogen debranching enzyme (AGL) and Glycogen phosphorylase (PYG) are responsible for glycogen breakdown. We have earlier shown that AGL is a regulator of bladder tumor growth. Here we investigate the role of AGL in non-small cell lung cancers (NSCLC). Short hairpin RNA (shRNA) driven knockdown of AGL resulted in increased anchorage independent and xenograft growth of NSCLC cells. We further establish that an increase in hyaluronic acid (HA) synthesis driven by Hyaluronic Acid Synthase 2 (HAS2) is critical for anchorage independent growth of NSCLC cells with AGL loss...
March 30, 2018: Oncotarget
https://www.readbyqxmd.com/read/29681215/hyaluronic-acid-dictates-chondrocyte-morphology-and-migration-in-composite-gels
#12
Renu Mohan, Neethu Mohan, Dhanesh Vaikkath
Tissue equivalent collagen-hyaluronic acid based hydrogels are widely used for cartilage tissue engineering, however not much importance has been given to investigate how cellular responses are altered with varying concentrations of hyaluronic acid in gels. In this study, different concentrations of hyaluronic acid dialdehyde (HAD) were combined with collagen to fabricate collagen-HAD composite (CH) gels, and the influence of HAD on cell shape, migration, viability, cytoskeletal organization and gel contraction were examined...
April 21, 2018: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29680675/far-red-light-mediated-programmable-anti-cancer-gene-delivery-in-cooperation-with-photodynamic-therapy
#13
Jinhui Wang, Hua He, Xin Xu, Xiao Wang, Yongbing Chen, Lichen Yin
Effective anti-cancer therapy is hurdled by the complicated extracellular and intracellular barriers, and thus a smart gene vector that can enable programmable gene delivery is highly demanded. Photo-manipulation of gene delivery processes features spatial and temporal precision, while majority of current strategies utilizes short-wavelength UV/visible light with poor tissue penetration or high-power-density near-infrared (NIR) light that would cause undesired heat damage. Herein, an ROS-degradable polycation was designed and co-delivered with a photosensitizer (PS), thus realizing photo-programmable gene delivery using far-red light (661 nm) at low optical power density (down to 5 mW cm-2 )...
April 12, 2018: Biomaterials
https://www.readbyqxmd.com/read/29680502/evaluation-of-hyaluronic-acid-combined-ternary-complexes-for-serum-resistant-and-targeted-gene-delivery-system
#14
Woong-Gil Hong, Gyeong-Won Jeong, Jae-Woon Nah
Branched polyethylenimine (bPEI) was well known as high transfection agent, which has many amine group. However, utilization of bPEI was limited due to high toxicity. To solve these problems, bPEI was introduced to low molecular weight water-soluble chitosan (LMWSC) with coupling agent. In addition, hyaluronic acid (HA), one of natural anion polymer, was introduced to binary complex of pDNA/bPEI-grafted LMWSC (LMPEI) to target the specific cancer cell and impart the serum resistant. Ternary complexes of pDNA/LMPEI/HA were prepared by electrostatic charge interaction and their binding affinity and DNase protection assay were conducted by gel retardation assay...
April 19, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29679778/recapitulating-spatiotemporal-tumor-heterogeneity-in-vitro-through-engineered-breast-cancer-microtissues
#15
Claudia Mazio, Costantino Casale, Giorgia Imparato, Francesco Urciuolo, Paolo Antonio Netti
Tumor and microenvironmental heterogeneity hinders the study of breast cancer biology and the assessment of therapeutic strategies, being associated with high variability and drug resistance. In this context, it is mandatory to develop three-dimensional breast tumor models able to reproduce this heterogeneity and the dynamic interaction occurring between tumor cells and microenvironment. Here we show a new breast cancer microtissue model (T-µTP) uniquely able to present intra-tumor morphological heterogeneity in a dynamic and responsive endogenous matrix...
April 18, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29679017/nf%C3%AE%C2%BAb-activation-in-differentiating-glioblastoma-stem-like-cells-is-promoted-by-hyaluronic-acid-signaling-through-tlr4
#16
Eva Ferrandez, Olga Gutierrez, David San Segundo, Jose L Fernandez-Luna
We have previously described that the NFκB pathway is upregulated during differentiation of glioblastoma stem-like cells (GSCs) which keeps differentiating GSCs in a proliferative astrocytic precursor state. However, extracellular signals and cellular mediators of this pathway are not clear yet. Here, we show that TLR4 is a key factor to promote NFκB activation in differentiating GSCs. TLR4 is upregulated during differentiation of GSCs and promotes transcriptional activation of NFκB as determined by luciferase-reporter assays and expression of NFκB target genes...
April 20, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29678787/cd44-directed-nanomicellar-payload-delivery-platform-for-selective-anticancer-effect-and-tumor-specific-imaging-of-triple-negative-breast-cancer
#17
Zhaoxian Wang, Samaresh Sau, Hashem O Alsaab, Arun K Iyer
Triple negative breast cancer (TNBC) is a highly aggressive tumor subtype, lacking estrogen, progesterone and human epidermal growth factor-2 (HER-2) receptors. Thus, early detection and targeted therapy of TNBC is an urgent need. Herein, we have developed a CD44 targeting Hyaluronic Acid (HA) decorated biocompatible oligomer, containing FDA approved vitamin E TPGS and Styrene Maleic Anhydride (SMA) (HA-SMA-TPGS) for targeting TNBC. The self-assembling HA-SMA-TPGS was encapsulated with poorly water soluble, potent curcumin analogue (CDF) to form nanomicelles (NM), HA-SMA-TPGS-CDF has demonstrated excellent nanoparticle charateristics for parenteral delivery...
April 17, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29677404/hybrid-scaffolds-of-mg-alloy-mesh-reinforced-polymer-extracellular-matrix-composite-for-critical-sized-calvarial-defect-reconstruction
#18
Yingqi Chen, Sang-Ho Ye, Hideyoshi Sato, Yang Zhu, Vesselin Shanov, Tarannum Tiasha, Antonio D'Amore, Samuel Luketich, Guojiang Wan, William R Wagner
The challenge of developing scaffolds to reconstruct critical-sized calvarial defects without the addition of high levels of exogenous growth factor remains relevant. Both osteogenic regenerative efficacy as well as suitable mechanical properties for the temporary scaffold system are of importance. In this study, a Mg alloy mesh reinforced polymer/demineralized bone matrix (DBM) hybrid scaffold was designed where the hybrid scaffold was fabricated by a concurrent electrospinning/electrospraying of poly(lactic-co-glycolic) (PLGA) polymer and DBM suspended in hyaluronic acid (HA)...
April 20, 2018: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29677369/targeted-drug-delivery-in-the-suprachoroidal-space-by-swollen-hydrogel-pushing
#19
Jae Hwan Jung, Patcharin Desit, Mark R Prausnitz
Purpose: The purpose is to target model drug particles to the posterior region of the suprachoroidal space (SCS) of the eye controlled via pushing by hydrogel swelling. Methods: A particle formulation containing 1% hyaluronic acid (HA) with fluorescent polymer particles and a hydrogel formulation containing 4% HA were introduced in a single syringe as two layers without mixing, and injected sequentially into the SCS of the rabbit eye ex vivo and in vivo using a microneedle...
April 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29676255/-perfecting-smile-esthetics-keep-it-pink
#20
Virginie Monnet-Corti, Angeline Antezack, Marion Pignoly
INTRODUCTION: Smile aesthetics is based on numerical, physical, physiological and psychological data regarding beauty, while taking into account the desires of the patient. It is determined by the shape, colour and position of the lips, teeth and gingival tissues. Periodontal examination in both the facial and labial settings supports analysis of the gingival display during natural and forced smiling, the health of the periodontium, the gingival contours, the aesthetic gingival line, and the presence of the papillae...
March 2018: L' Orthodontie Française
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