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chondroitin sulfate

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https://www.readbyqxmd.com/read/28917911/injectable-glycosaminoglycan-protein-nano-complex-in-semi-interpenetrating-networks-a-biphasic-hydrogel-for-hyaline-cartilage-regeneration
#1
Janani Radhakrishnan, Anuradha Subramanian, Swaminathan Sethuraman
Articular hyaline cartilage regeneration remains challenging due to its less intrinsic reparability. The study develops injectable biphasic semi-interpenetrating polymer networks (SIPN) hydrogel impregnated with chondroitin sulfate (ChS) nanoparticles for functional cartilage restoration. ChS loaded zein nanoparticles (∼150nm) prepared by polyelectrolyte-protein complexation were interspersed into injectable SIPNs developed by blending alginate with poly(vinyl alcohol) and calcium crosslinking. The hydrogel exhibited interconnected porous microstructure (39...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917905/characterization-of-a-water-soluble-chitosan-derivative-and-its-potential-for-submucosal-injection-in-endoscopic-techniques
#2
Hidemi Hattori, Hironori Tsujimoto, Kazuo Hase, Masayuki Ishihara
To examine the potential of chitosan-based agents for submucosal injection in endoscopic techniques, a chitosan derivative was prepared with lactose moieties linked to the amino groups of its glucosamine units (CH-LA). After dissolving CH-LA in neutral pH solutions, including physiological saline (CH-LA-S), its response to different concentrations of anionic glycosaminoglycans and proteins in the surrounding environment was examined. The CH-LA-S form changed in the presence of sulfated glycosaminoglycans (heparin, chondroitin sulfate, and mucin) and protein (fibrinogen)...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28904929/diagnosing-mucopolysaccharidosis-type-iv-a-by-the-fluorometric-assay-of-n-acetylgalactosamine-6-sulfate-sulfatase-activity
#3
Sedigheh Shams, Maliheh Barazandeh Tehrani, Gabriel Civallero, Koosha Minookherad, Roberto Giugliani, Aria Setoodeh, Mohammad Taghi Haghi Ashtiani
BACKGROUND: Mucopolysaccharidosis type IVA, also known as Morquio A or MPS IV A, is an autosomal recessive disease caused by the deficiency of the lysosomal enzyme N-acetylgalactosamine-6-sulfate sulfatase (GALNS). The loss of GALNS activity leads to the impaired breakdown of glycosaminoglycans (GAGs) keratan sulfate and chondroitin-6-sulfate. The accumulation of GAGs results in multiple organ damage. The accurate and early diagnosis of this disorder helps enhance the effectiveness of the treatment...
2017: Journal of Diabetes and Metabolic Disorders
https://www.readbyqxmd.com/read/28901718/chondroitin-sulfate-proteoglycans-negatively-regulate-the-positioning-of-mitochondria-and-endoplasmic-reticulum-to-distal-axons
#4
Rajiv Sainath, Lorena Armijo-Weingart, Andrea Ketscheck, Zhuxuan Xu, Shuxin Li, Gianluca Gallo
Chondroitin sulfate proteoglycans (CSPGs) are components of the extracellular matrix that inhibit the extension and regeneration of axons. However, the underlying mechanism of action remains poorly understood. Mitochondria and endoplasmic reticulum (ER) are functionally inter-linked organelles important to axon development and maintenance. We report that CSPGs impair the targeting of mitochondria and ER to the growth cones of chicken embryonic sensory axons. The effect of CSPGs on the targeting of mitochondria is blocked by inhibition of the LAR receptor for CSPGs...
September 13, 2017: Developmental Neurobiology
https://www.readbyqxmd.com/read/28901031/isomer-separation-and-effect-of-the-polymerization-degree-on-the-gas-phase-structure-of-chondroitin-sulfate-oligosaccharides-analyzed-by-ion-mobility-tandem-mass-spectrometry
#5
Salomé Poyer, Chrystel Lopin-Bon, Jean-Claude Jacquinet, Jean-Yves Salpin, Régis Daniel
RATIONALE: Chondroitin sulfate (CS) glycosaminoglycans are bioactive sulfated polysaccharides comprising repeating units of uronic acid and N-acetyl galactose sulfated at various positions. The optimal length and sulfation pattern of the CS bioactive sequences remain elusive so that structure-activity relationship cannot be easily established. Development of efficient analytical methods allowing the differentiation of the various sulfation patterns of CS sequences is therefore of particular importance to correlate their biological functions to the sulfation pattern...
September 12, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28899488/investigating-the-structural-and-functional-features-of-representative-recombinants-of-chondroitinase-abc-i
#6
Khadijeh Moradi, Seyedeh Akram Shirdel, Masoumeh Shamsi, Vahab Jafarian, Khosrow Khalifeh
Chondroitin Sulfate Proteoglycans (CSPGs) are the main inhibitors for axon regeneration after damaging of Central Nervous System (CNS). Chondroitinase ABC I (cABC I) can degrade CSPGs by removing chondroitin and dermatan sulfate side chains from proteoglycans. Hence, it may be considered as an attractive candidate in biomedicine. For practical applications of this enzyme, increasing the effective circulating level and reducing the number and volume of injections for patients is one of the main concerns which is directly related to conformational stability and catalytic efficiency of the enzyme...
December 2017: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/28893995/n-glycolyl-groups-of-nonhuman-chondroitin-sulfates-survive-in-ancient-fossils
#7
Anne K Bergfeld, Roger Lawrence, Sandra L Diaz, Oliver M T Pearce, Darius Ghaderi, Pascal Gagneux, Meave G Leakey, Ajit Varki
Biosynthesis of the common mammalian sialic acid N-glycolylneuraminic acid (Neu5Gc) was lost during human evolution due to inactivation of the CMAH gene, possibly expediting divergence of the Homo lineage, due to a partial fertility barrier. Neu5Gc catabolism generates N-glycolylhexosamines, which are potential precursors for glycoconjugate biosynthesis. We carried out metabolic labeling experiments and studies of mice with human-like Neu5Gc deficiency to show that Neu5Gc degradation is the metabolic source of UDP-GlcNGc and UDP-GalNGc and the latter allows an unexpectedly selective incorporation of N-glycolyl groups into chondroitin sulfate (CS) over other potential glycoconjugate products...
September 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28890654/chondroitin-sulfate-inhibits-monocyte-chemoattractant-protein-1-release-from-3t3-l1-adipocytes-a-new-treatment-opportunity-for-obesity-related-inflammation
#8
Thomas V Stabler, Eulàlia Montell, Josep Vergés, Janet L Huebner, Virginia Byers Kraus
Monocyte chemoattractant protein-1 (MCP-1) overproduction from inflamed adipose tissue is a major contributor to obesity-related metabolic syndromes. 3T3-L1 embryonic fibroblasts were cultured and differentiated into adipocytes using an established protocol. Adipocytes were treated with lipopolysaccharide (LPS) to induce inflammation and thus MCP-1 release. At the same time, varying concentrations of chondroitin sulfate (CS) were added in a physiologically relevant range (10-200 µg/mL) to determine its impact on MCP-1 release...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28890301/antibody-recognizing-4-sulfated-chondroitin-sulfate-proteoglycans-restores-memory-in-tauopathy-induced-neurodegeneration
#9
Sujeong Yang, Sam Hilton, João Nuno Alves, Lisa M Saksida, Timothy Bussey, Russell T Matthews, Hiroshi Kitagawa, Maria Grazia Spillantini, Jessica C F Kwok, James W Fawcett
Chondroitin sulfate proteoglycans (CSPGs) are the main active component of perineuronal nets (PNNs). Digestion of the glycosaminoglycan chains of CSPGs with chondroitinase ABC or transgenic attenuation of PNNs leads to prolongation of object recognition memory and activation of various forms of plasticity in the adult central nervous system. The inhibitory properties of the CSPGs depend on the pattern of sulfation of their glycosaminoglycans, with chondroitin 4-sulfate (C4S) being the most inhibitory form. In this study, we tested a number of candidates for functional blocking of C4S, leading to selection of an antibody, Cat316, which specifically recognizes C4S and blocks its inhibitory effects on axon growth...
August 9, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28890259/silk-fibroin-chondroitin-sulfate-scaffold-with-immuno-inhibition-property-for-articular-cartilage-repair
#10
Feifei Zhou, Xianzhu Zhang, Dandan Cai, Jun Li, Qin Mu, Wei Zhang, Shouan Zhu, Yangzi Jiang, Weiliang Shen, Shufang Zhang, Hong Wei Ouyang
The demand of favorable scaffolds has increased for the emerging cartilage tissue engineering. Chondroitin sulfate (CS) and silk fibroin have been investigated and reported with safety and excellent biocompatibility as tissue engineering scaffolds. However, the rapid degradation rate of pure CS scaffolds presents a challenge to effectively recreate neo-tissue similar to natural articular cartilage. Meanwhile the silk fibroin is well used as a structural constituent material because its remarkable mechanical properties, long-lasting in vivo stability and hypoimmunity...
September 7, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28884960/genotypic-phenotypic-features-and-enzyme-replacement-therapy-outcome-in-patients-with-mucopolysaccharidosis-vi-from-turkey
#11
Mustafa Kılıç, Ali Dursun, Turgay Coşkun, Ayşegül Tokatlı, Rıza K Özgül, Didem Yücel-Yılmaz, Mehmet Karaca, Deniz Doğru, Dursun Alehan, Sibel Kadayıfçılar, Aydan Genç, Handan Turan-Dizdar, Burhanettin Gönüldaş, Sema Savcı, Melda Sağlam, Cemalettin Aksoy, Umut Arslan, Hatice-Serap Sivri
Mucopolysaccharidosis type VI (MPS VI) is a lysosomal storage disorder (LSD) characterized by a chronic, progressive course with multiorgan involvement. In our study, clinical, biochemical, molecular findings, and response to enzyme replacement therapy (ERT) for at least 6 months were evaluated in 20 patients with MPS VI. Treatment effects on clinical findings such as liver and spleen sizes, cardiac and respiratory parameters, visual and auditory changes, joints' range of motions, endurance tests and changes in urinary glycosaminoglycan excretions, before and after ERT were analyzed...
September 8, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28884364/a-new-chemical-complex-can-rapidly-concentrate-lentivirus-and-significantly-enhance-gene-transduction
#12
Jing-Yu Lee, Hu-Hui Lee
In this study, we developed a new purification method using chondroitin sulfate C (CSC) and protamine sulfate (PS) to concentrate lentivirus. To evaluate the efficiency of this new method, we compared it with several previously described purification protocols, including virus concentrated by ultracentrifugation (Ultra), precipitated by polyethylene glycol (PEG), and sedimented by CSC combined with polybrene (PB). After using the different methods to purify and concentrate equivalent amounts of lentivirus supernatant, the virus pellets precipitated by the different methods were resuspended using the equivalent volumes of DMEM...
September 7, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28881287/recent-advances-in-polysaccharides-for-osteoarthritis-therapy
#13
Qixin Chen, Xintian Shao, Peixue Ling, Fei Liu, Guanying Han, Fengshan Wang
The polysaccharides used in the treatment of osteoarthritis (OA) mainly include sodium hyaluronate, chondroitin sulfate, chitosan, xanthan gum, Low molecular weight heparin, alginate and other polysaccharides. This review summarizes the recent advances in the chemistry and biological activities of polysaccharides for the treatment of OA.
August 24, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28875826/current-treatment-options-for-osteoarthritis
#14
Sevdalina Lambova, Walter Hermann, Ulf Müller-Ladner
BACKGROUND: Osteoarthritis (ОА) is the most common joint disease and a leading cause for impaired function and disability with significant treatment costs and socio-economic burden. Despite recent achievements in the knowledge on disease pathogenesis, the treatment is still a challenge and contrary to inflammatory joint diseases, no disease-modifying drugs are currently available for OA. OBJECTIVE: Different response in different localizations of the disease further complicates the therapeutic choice...
August 29, 2017: Current Rheumatology Reviews
https://www.readbyqxmd.com/read/28867754/sushi-repeat-containing-protein-x-linked-2-promotes-angiogenesis-through-the-urokinase-type-plasminogen-activator-receptor-dependent-integrin-%C3%AE-v%C3%AE-3-focal-adhesion-kinase-pathways
#15
Kuiliang Liu, Jianghao Fan, Jing Wu
Sushi repeat-containing protein X-linked 2 (SRPX2) is a newly identified chondroitin sulfate proteoglycan that is markedly elevated in multiple solid tumors. It is also suggested that SRPX2 is associated with angiogenesis. A conditioned medium of SRPX2 overexpressing colorectal cancer (CRC) cells and SRPX2 recombinant protein was used to evaluate the effect of secretory SRPX2 on the angiogenesis ability of human umbilical vein endothelial cells (HUVECs) and the involved molecular mechanisms. It was revealed that the activity of SRPX2 is dependent on the urokinase-type plasminogen activator receptor and cooperation of the integrin αvβ3 co-receptor...
2017: Drug Discoveries & Therapeutics
https://www.readbyqxmd.com/read/28867285/mating-in-the-closest-living-relatives-of-animals-is-induced-by-a-bacterial-chondroitinase
#16
Arielle Woznica, Joseph P Gerdt, Ryan E Hulett, Jon Clardy, Nicole King
We serendipitously discovered that the marine bacterium Vibrio fischeri induces sexual reproduction in one of the closest living relatives of animals, the choanoflagellate Salpingoeca rosetta. Although bacteria influence everything from nutrition and metabolism to cell biology and development in eukaryotes, bacterial regulation of eukaryotic mating was unexpected. Here, we show that a single V. fischeri protein, the previously uncharacterized EroS, fully recapitulates the aphrodisiac-like activity of live V...
September 7, 2017: Cell
https://www.readbyqxmd.com/read/28866193/injectable-natural-polymer-compound-for-tissue-engineering-of-intervertebral-disc-in-vitro-study
#17
Masoud Ghorbani, Jafar Ai, Mohammad Reza Nourani, Mahmoud Azami, Batool Hashemi Beni, Shiva Asadpour, Sima Bordbar
Intervertebral disc degeneration is recognized to be the leading cause for chronic low-back pain. Injectable hydrogel is one of the great interests for tissue engineering and cell encapsulation specially for intervertebral (IVD) affecting rate of regeneration success, in this study we assessed viscoelastic properties of a Chitosan-β glycerophosphate-hyaluronic acid, Chondroitin-6-sulfate, type 2 of Collagen, gelatin, fibroin silk (Ch-β-GP-HA-CS-Col-Ge-FS) hydrogel which was named as NP hydrogel that is natural extracellular matrix of IVD...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28862726/the-therapeutic-approach-to-different-forms-of-cystitis-impact-on-public-health
#18
Stéphane Droupy
Interstitial cystitis/bladder pain syndrome, recurrent urinary tract infections and other forms of cystitis significantly impact the quality of life of patients with chronic bladder disorders and impose a considerable economic burden on health systems. Effective management is essential to provide symptom relief and to reduce the negative impact of chronic bladder disorders. Identifying the appropriate pharmacological or non-pharmacological approach is essential, and there is a growing evidence base for the use of intravesical hyaluronic acid and chondroitin sulfate in several bladder conditions, including recurrent urinary tract infections...
August 17, 2017: Urologia
https://www.readbyqxmd.com/read/28862360/mechanically-stimulated-biomarkers-signal-cartilage-changes-over-5-years-consistent-with-disease-progression-in-medial-knee-osteoarthritis-patients
#19
Constance R Chu, Shikha Sheth, Jennifer C Erhart-Hledik, Bao Do, Matthew R Titchenal, Thomas P Andriacchi
Using serum biomarkers to assess osteoarthritis (OA) disease state and risks of progression remain challenging. This study tested the hypothesis that changes to serum biomarkers in response to a mechanical stimulus in patients with medial knee OA signal cartilage thickness changes five years later. Specifically, serum concentrations of a collagen degradation marker (C1,2C) and a chondroitin sulfate synthesis marker (CS846) were measured 0.5 and 5.5 hours after a 30-minute walk in 16 patients. Regional cartilage thickness changes measured from magnetic resonance images obtained at study entry and at 5-year follow-up were tested for correlations with baseline biomarker changes after mechanical stimulus, and for differences between groups stratified based on whether biomarker levels increased or decreased...
September 1, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28860977/damaged-neocortical-perineuronal-nets-due-to-experimental-focal-cerebral-ischemia-in-mice-rats-and-sheep
#20
Wolfgang Härtig, Bianca Mages, Susanne Aleithe, Björn Nitzsche, Stephan Altmann, Henryk Barthel, Martin Krueger, Dominik Michalski
As part of the extracellular matrix (ECM), perineuronal nets (PNs) are polyanionic, chondroitin sulfate proteoglycan (CSPG)-rich coatings of certain neurons, known to be affected in various neural diseases. Although these structures are considered as important parts of the neurovascular unit (NVU), their role during evolution of acute ischemic stroke and subsequent tissue damage is poorly understood and only a few preclinical studies analyzed PNs after acute ischemic stroke. By employing three models of experimental focal cerebral ischemia, this study was focused on histopathological alterations of PNs and concomitant vascular, glial and neuronal changes according to the NVU concept...
2017: Frontiers in Integrative Neuroscience
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