Consulta: subjectFacets:"Glycosaminoglycan"
Registros recuperados: 13
Data/hora: 01/06/2024 10:29:31

Effects of a sulfated exopolysaccharide produced by Altermonas infernus on bone biology
Provedor de dados: 5
Autores: Velasco, C. Ruiz; Baud'Huin, M.; Sinquin, Corinne; Maillasson, M.; Heymann, D.; Colliec-jouault, Sylvia; Padrines, M.
The growth and differentiation of bone cells is controlled by various factors which can be modulated by heparan sulphates. Here, we investigated the effects of an oversulphated exopolysaccharide (OS-EPS) on bone. We compared the effect of this compound with that of a native exopolysaccharide (EPS). Long-term administration of OS-EPS causes cancellous bone loss in mice due, in part, to an increase in the number of osteoclasts lining the trabecular bone surface. No significant difference in cancellous bone volume was found between EPS-treated mice and age-matched control mice, underlying the importance of sulphation in trabecular bone loss. However, the mechanism sustaining this osteoporosis was unclear. To clarify OS-EPS activities, we investigated the...
Tipo: Text
Palavras-chave: Bone metabolism; Bone remodeling; Exopolysaccharide; Glycosaminoglycan; Heparin.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00032/14300/15749.pdf

Enriching a cellulose hydrogel with a biologically active marine exopolysaccharide for cell-based cartilage engineering
Provedor de dados: 5
Autores: Rederstorff, E.; Rethore, G.; Weiss, P.; Sourice, S.; Beck-cormier, S.; Mathieu, E.; Maillasson, M.; Jacques, Y.; Colliec-jouault, Sylvia; Fellah, B. H.; Guicheux, J.; Vinatier, C.
The development of biologically and mechanically competent hydrogels is a prerequisite in cartilage engineering. We recently demonstrated that a marine exopolysaccharide, GY785, stimulates the in vitro chondrogenesis of adipose stromal cells. In the present study, we thus hypothesized that enriching our silated hydroxypropyl methylcellulose hydrogel (Si-HPMC) with GY785 might offer new prospects in the development of scaffolds for cartilage regeneration. The interaction properties of GY785 with growth factors was tested by surface plasmon resonance (SPR). The biocompatibility of Si-HPMC/GY785 towards rabbit articular chondrocytes (RACs) and its ability to maintain and recover a chondrocytic phenotype were then evaluated in vitro by MTS assay, cell counting...
Tipo: Text
Palavras-chave: Cartilage; Hydrogel; Glycosaminoglycan; Marine polysaccharides; Chondrocytes; Tissue engineering.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00303/41449/40650.pdf

An in vitro study of two GAG-like marine polysaccharides incorporated into injectable hydrogels for bone and cartilage tissue engineering
Provedor de dados: 5
Autores: Rederstorff, Emilie; Weiss, Pierre; Sourice, S.; Pilet, P.; Xie, F.; Sinquin, Corinne; Colliec-jouault, Sylvia; Guicheux, Jerome; Laib, S.
Natural polysaccharides are attractive compounds with which to build scaffolds for bone and cartilage tissue engineering. Here we tested two non-standard ones, HE800 and GY785, for the two-dimensional (2-D) and three-dimensional (3-D) culture of osteoblasts (MC3T3-E1) and chondrocytes (C28/I2). These two glycosaminoglycan-like marine exopolysaccharides were incorporated into an injectable silylated hydroxypropylmethylcellulose-based hydrogel (Si-HPMC) that has already shown its suitability for bone and cartilage tissue engineering. Results showed that, similarly to hyaluronic acid (HA) (the control), HE800 and GY785 significantly improved the mechanical properties of the Si-HPMC hydrogel and induced the attachment of MC3T3-E1 and C28/I2 cells when these...
Tipo: Text
Palavras-chave: Glycosaminoglycan; Hydrogel; Polysaccharide; Bone and cartilage tissue engineering; In vitro test.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00030/14090/15747.pdf

Deep-sea Hydrothermal Vent Bacteria as a Source of Glycosaminoglycan-Mimetic Exopolysaccharides
Provedor de dados: 5
Autores: Zykwinska, Agata; Marchand, Laetitia; Bonnetot, Sandrine; Sinquin, Corinne; Colliec-jouault, Sylvia; Delbarre-ladrat, Christine.
Bacteria have developed a unique strategy to survive in extreme environmental conditions through the synthesis of an extracellular polymeric matrix conferring upon the cells a protective microenvironment. The main structural component of this complex network constitutes high-molecular weight hydrophilic macromolecules, namely exopolysaccharides (EPS). EPS composition with the presence of particular chemical features may closely be related to the specific conditions in which bacteria evolve. Deep-sea hydrothermal vent bacteria have already been shown to produce EPS rich in hexosamines and uronic acids, frequently bearing some sulfate groups. Such a particular composition ensures interesting functional properties, including biological activities mimicking...
Tipo: Text
Palavras-chave: Exopolysaccharide; Glycosaminoglycan; Uronic acid; Hexosamine; Phylogenetic analysis.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00506/61756/65728.pdf

Anti-Metastatic Properties of a Marine Bacterial Exopolysaccharide-Based Derivative Designed to Mimic Glycosaminoglycans
Provedor de dados: 5
Autores: Heymann, Dominique; Ruiz-velasco, Carmen; Chesneau, Julie; Ratiskol, Jacqueline; Sinquin, Corinne; Colliec-jouault, Sylvia.
Osteosarcoma is the most frequent malignant primary bone tumor characterized by a high potency to form lung metastases. In this study, the effect of three oversulfated low molecular weight marine bacterial exopolysaccharides (OS-EPS) with different molecular weights (4, 8 and 15 kDa) were first evaluated in vitro on human and murine osteosarcoma cell lines. Different biological activities were studied: cell proliferation, cell adhesion and migration, matrix metalloproteinase expression. This in vitro study showed that only the OS-EPS 15 kDa derivative could inhibit the invasiveness of osteosarcoma cells with an inhibition rate close to 90%. Moreover, this derivative was potent to inhibit both migration and invasiveness of osteosarcoma cell lines; had no...
Tipo: Text
Palavras-chave: Exopolysaccharides; Glycosaminoglycan; Heparin-like; Derivatives; Sulfation; Bone metabolism; Bone remodeling; Lung mestatases; Osteosarcoma.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00333/44442/44112.pdf

Galactosaminoglycans from normal myometrium and leiomyoma
Provedor de dados: 56
Autores: Berto,A.G.A.; Oba,S.M.; Michelacci,Y.M.; Sampaio,L.O.
In many tumors, the amount of chondroitin sulfate in the extracellular matrix has been shown to be elevated when compared to the corresponding normal tissue. Nevertheless, the degree of chondroitin sulfate increase varies widely. In order to investigate a possible correlation between the amount of chondroitin sulfate and tumor size, several individual specimens of human leiomyoma, a benign uterine tumor, were analyzed. The glycosaminoglycans from eight tumors were extracted and compared with those from the respective adjacent normal myometrium. The main glycosaminoglycan found in normal myometrium was dermatan sulfate, with small amounts of chondroitin sulfate and heparan sulfate. In leiomyoma, both dermatan sulfate and chondroitin sulfate were detected...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Galactosaminoglycan; Glycosaminoglycan; Chondroitin sulfate; Dermatan sulfate; Leiomyoma; Myometrium.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000500011

Effect of epithelial debridement on human cornea proteoglycans
Provedor de dados: 56
Autores: Soriano,E.S.; Campos,M.S.Q.; Aguiar,J.A.K.; Michelacci,Y.M.
Corneal transparency is attributed to the regular spacing and diameter of collagen fibrils, and proteoglycans may play a role in fibrillogenesis and matrix assembly. Corneal scar tissue is opaque and this opacity is explained by decreased ultrastructural order that may be related to proteoglycan composition. Thus, the objectives of the present study were to characterize the proteoglycans synthesized by human corneal explants and to investigate the effect of mechanical epithelial debridement. Human corneas unsuitable for transplants were immersed in F-12 culture medium and maintained under tissue culture conditions. The proteoglycans synthesized in 24 h were labeled metabolically by the addition of 35S-sulfate to the medium. These compounds were extracted...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Corneal explants; De-epithelization; Glycosaminoglycan; Proteoglycan.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000300005

Collagens and proteoglycans of the corneal extracellular matrix
Provedor de dados: 56
Autores: Michelacci,Y.M.
The cornea is a curved and transparent structure that provides the initial focusing of a light image into the eye. It consists of a central stroma that constitutes 90% of the corneal depth, covered anteriorly with epithelium and posteriorly with endothelium. Its transparency is the result of the regular spacing of collagen fibers with remarkably uniform diameter and interfibrillar space. Corneal collagen is composed of heterotypic fibrils consisting of type I and type V collagen molecules. The cornea also contains unusually high amounts of type VI collagen, which form microfibrillar structures, FACIT collagens (XII and XIV), and other nonfibrillar collagens (XIII and XVIII). FACIT collagens and other molecules, such as leucine-rich repeat proteoglycans,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cornea; Proteoglycan; Glycosaminoglycan; Collagen; Dermatan sulfate; Keratan sulfate.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000800009

Distribution of small proteoglycans and glycosaminoglycans in humerus-related articular cartilage of chickens
Provedor de dados: 56
Autores: Rodrigues,E.D.; Pimentel,E.R.; Mourão,P.A.S.; Gomes,L.
The expression of components present in the cartilaginous extracellular matrix is related to development, gender, and genotype, as well as to the biomechanical properties of each type of cartilage. In the present study, we analyzed small proteoglycans and glycosaminoglycans present in different cartilages of the chicken wing after extraction with guanidine hydrochloride or papain. Quantitative analysis of glycosaminoglycans showed a larger amount in humeral cartilage (around 200 mg/g tissue) than in articular cartilage of the radius and ulna, with 138 and 80 mg/g tissue, respectively. Non-collagenous proteins isolated were predominantly from cartilage in the proximal regions of the humerus and radius. D4 fractions obtained by ultracentrifugation were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Proteoglycan; Fibromodulin; Decorin; Glycosaminoglycan; Cartilage; Chicken.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000300009

Heparan sulfate and cell division
Provedor de dados: 56
Autores: Porcionatto,M.A.; Nader,H.B.; Dietrich,C.P.
Heparan sulfate is a component of vertebrate and invertebrate tissues which appears during the cytodifferentiation stage of embryonic development. Its structure varies according to the tissue and species of origin and is modified during neoplastic transformation. Several lines of experimental evidence suggest that heparan sulfate plays a role in cellular recognition, cellular adhesion and growth control. Heparan sulfate can participate in the process of cell division in two distinct ways, either as a positive or negative modulator of cellular proliferation, or as a response to a mitogenic stimulus.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heparan sulfate; Glycosaminoglycan; Proteoglycan; Cell division; Cell cycle; Growth factors.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000500006

Noncrystalline uric acid inhibits proteoglycan and glycosaminoglycan synthesis in distal tubular epithelial cells (MDCK)
Provedor de dados: 56
Autores: Borges,F.T.; Dalboni,M.A.; Michelacci,Y.M.; Schor,N.
Hyperuricemia is associated with renal stones, not only consisting of uric acid (UrAc) but also of calcium oxalate (CaOx). Glycosaminoglycans (GAGs) are well-known inhibitors of growth and aggregation of CaOx crystals. We analyzed the effect of noncrystalline UrAc on GAG synthesis in tubular distal cells. MDCK (Madin-Darby canine kidney) cells were exposed to noncrystalline UrAc (80 µg/mL) for 24 h. GAGs were labeled metabolically and characterized by agarose gel electrophoresis. The expression of proteoglycans and cyclooxygenase 2 (COX-2) was assessed by real-time PCR. Necrosis, apoptosis and prostaglandin E2 (PGE2) were determined by acridine orange, HOESCHT 33346, and ELISA, respectively. CaOx crystal endocytosis was evaluated by flow cytometry....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Noncrystalline uric acid; Glycosaminoglycan; MDCK; Lipopolysaccharide; Apoptosis; Proteoglycan.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010001000006

Decorin is one of the proteoglycans expressed in Walker 256 rat mammary carcinoma
Provedor de dados: 56
Autores: Oba-Shinjo,S.M.; Berto,A.G.A.; Passerotti,C.C.; Barbosa,C.D.; Sampaio,L.O.
Proteoglycan and glycosaminoglycan content was analyzed in a model of rat mammary carcinoma to study the roles of these compounds in tumorigenesis. Hyaluronic acid and proteoglycans bearing chondroitin and/or dermatan sulfate chains were detected in solid tumors obtained after subcutaneous inoculation of Walker 256 rat carcinoma cells. About 10% of sulfated glycosaminoglycan chains corresponded to heparan sulfate. The small leucine-rich proteoglycan, decorin, was identified as one of the proteoglycans, in addition to others of higher molecular weight, by cross-reaction with an antiserum raised against pig laryngeal decorin and by N-terminal amino acid sequencing. Decorin was separated from other proteoglycans by hydrophobic chromatography and its complete...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Proteoglycan; Glycosaminoglycan; Walker 256 tumor; Carcinoma.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000800015

Proteinase activity regulation by glycosaminoglycans
Provedor de dados: 56
Autores: Tersariol,I.L.S.; Pimenta,D.C.; Chagas,J.R.; Almeida,P.C.
There are few reports concerning the biological role and the mechanisms of interaction between proteinases and carbohydrates other than those involved in clotting. It has been shown that the interplay of enzymes and glycosaminoglycans is able to modulate the activity of different proteases and also to affect their structures. From the large number of proteases belonging to the well-known protease families and also the variety of carbohydrates described as widely distributed, only few events have been analyzed more deeply. The term "family" is used to describe a group of proteases in which every member shows an evolutionary relationship to at least one other protease. This relationship may be evident throughout the entire sequence, or at least in that part...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Proteinases; Heparin binding; Glycosaminoglycan; Macromolecules.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000200001