Consulta: subjectFacets:"Glycosaminoglycans"
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Data/hora: 23/05/2024 16:05:42

Mucopolysaccharidoses in northern Brazil: Targeted mutation screening and urinary glycosaminoglycan excretion in patients undergoing enzyme replacement therapy
Provedor de dados: 74
Autores: Viana,Gustavo M.; Lima,Nathália O. de; Cavaleiro,Rosely; Alves,Erik; Souza,Isabel C.N.; Feio,Raimunda; Leistner-Segal,Sandra; Schwartz,Ida; Giugliani,Roberto; Silva,Luiz C. Santana da.
Mucopolysaccharidoses (MPS) are rare lysosomal disorders caused by the deficiency of specific lysosomal enzymes responsible for glycosaminoglycan (GAG) degradation. Enzyme Replacement Therapy (ERT) has been shown to reduce accumulation and urinary excretion of GAG, and to improve some of the patients' clinical signs. We studied biochemical and molecular characteristics of nine MPS patients (two MPS I, four MPS II and three MPS VI) undergoing ERT in northern Brazil. The responsiveness of ERT was evaluated through urinary GAG excretion measurements. Patients were screened for eight common MPS mutations, using PCR, restriction enzyme tests and direct sequencing. Two MPS I patients had the previously reported mutation p.P533R. In the MPS II patients, mutation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mucopolysaccharidosis; Enzyme replacement therapy; Mutations; Glycosaminoglycans.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000300007

Fucoidan a sulfated polysaccharide from brown algae is a potent modulator of connective tissue proteolysis
Provedor de dados: 5
Autores: Senni, Karim; Gueniche, Farida; Foucault Bertaud, Alexandrine; Igondjo Tchen, Sylvie; Fioretti, Florence; Colliec-jouault, Sylvia; Durand, Patrick; Guezennec, Jean; Godeau, Gaston; Letourneur, Didier.
Fucoidans are sulfated fucosylated polymers from brown algae cell wall that exhibit some heparin/heparan sulfate properties. We previously demonstrated that these polysaccharides were able in vitro to stimulate dermal fibroblast proliferation and extracellular matrix deposition. Here, we investigated the action of a 16 kDa fucoidan fraction on parameters involved in connective tissue breakdown. This fucoidan is able to inhibit gelatinase A secretion and stromelysin 1 induction by interleukin-1 beta on dermal fibroblasts in culture. Furthermore, we observed that fucoidan increases the rate of association of MMPs with their specific inhibitors namely TIMPs. Using tissue sections of human skin in ex vivo experiments, we evidenced that this polysaccharide was...
Tipo: Text
Palavras-chave: Interleukin 1 beta; Leukocyte elastase; Matrix metalloproteinases; Extracellular matrix remodeling; Glycosaminoglycans; Fucoidan.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2147.pdf

Histological Description of Morphogenesis of the Gastroesophageal Mucosa of Gallus gallus domesticus (Linnaeus, 1758)
Provedor de dados: 77
Autores: Ventura,Adriana; do Nascimento,Aparecida Alves; dos Santos,Marcos Antônio José; Vieira-Lopes,Danielle Alcântara; Sales,Armando; Pinheiro,Nadja Lima.
The ontogenesis of the gastroesophageal mucosa involves morphological alterations related to its structure and the function of each segment. The present study describes the histogenesis of the mucus-secreting epithelium and glands of the esophagus, gizzard, and proventriculus of the chicken (Gallus gallus), and identifies alterations in the secretion pattern of glycosaminoglycans (GAG's). We analyzed 38 chicken embryos, processed the material collected following the histological routine, and then stained it with hematoxylin-eosin for the analysis of tissue structure and with Gomori's trichrome for the identification of conjunctive tissue and collagen fibers. We used the PAS histochemical technique for the analysis of neutral GAG's and the AB pH 2.5...
Tipo: Journal article
Palavras-chave: Chicken embryos; Development; Glycosaminoglycans; Esophagus; Stomach.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000400030

Effect of fermentation conditions on the production of hyaluronic acid by Streptococcus zooepidemicus ATCC 39920
Provedor de dados: 3
Autores: Pan, Nicole Caldas; Vignoli, Josiane Alessandra; Baldo, Cristiani; Pereira, Hanny Cristina Braga; Silva, Rui Sérgio dos Santos Ferreira; Celligoi, Maria Antonia Pedrine Colabone.
The production of hyaluronic acid by Streptococcus zooepidemicus ATCC 39920 with varying rates of pH (6.0, 7.0, 8.0), temperature (34; 37; 40°C), agitation (100, 150, 200 rpm), glucose (10, 20, 30 g L-1) and yeast extract concentration (10, 20, 30 g L-1) was evaluated by statistical approaches. The best conditions for the production of hyaluronic acid was pH 8.0, 37°C and 100 rpm in a medium containing 30 g L-1 glucose and yeast extract, for a production of 0.787 g L-1. Temperature, pH and yeast extract were significant variables (p &lt; 0.05). Yeast extract and pH had a positive effect on the production of the polymer. Lactate, formate and acetate synthesis were also analyzed. Current assay showed the feasibility of statistical tools to optimize the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioquímica de microrganismos physical factors; Nutritional factors; Glycosaminoglycans; Factorial design; Microbial production. Fermentação.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28176

The extracellular matrix of the lung and its role in edema formation
Provedor de dados: 42
Autores: Pelosi,Paolo; Rocco,Patricia R.M.; Negrini,Daniela; Passi,Alberto.
The extracellular matrix is composed of a three-dimensional fiber mesh filled with different macromolecules such as: collagen (mainly type I and III), elastin, glycosaminoglycans, and proteoglycans. In the lung, the extracellular matrix has several functions which provide: 1) mechanical tensile and compressive strength and elasticity, 2) low mechanical tissue compliance contributing to the maintenance of normal interstitial fluid dynamics, 3) low resistive pathway for an effective gas exchange, d) control of cell behavior by the binding of growth factors, chemokines, cytokines and the interaction with cell-surface receptors, and e) tissue repair and remodeling. Fragmentation and disorganization of extracellular matrix components comprises the protective...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Collagen; Glycosaminoglycans; Proteoglycan; Interstitial pressure.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000200010

Altered hyaluronic acid content in tear fluid of patients with adenoviral conjunctivitis
Provedor de dados: 42
Autores: DREYFUSS,JULIANA L.; REGATIERI,CAIO V.; COELHO,BRUNO; BARBOSA,JOSÉ B.; FREITAS,DENISE DE; NADER,HELENA B.; MARTINS,JOÃO R.
The adenoviral conjunctivitis is one of the biggest causes of conjunctival infection in the world. Conjunctivitis causes relatively nonspecific symptoms, as hyperaemia and chemosis. Even after biomicroscopy, complex laboratory tests, such as viral culture, are necessary to identify the pathogen or its etiology. To contribute to the better understanding of the pathobiology of the adenoviral conjunctivitis, the tear fluids of patients with unilateral acute adenovirus conjunctivitis (UAAC), normal donors (control) and patients with allergic conjunctivitis were analyzed. Tear samples were collected with Schirmer strips from control, allergic conjunctivitis and UAAC patients, diagnosed by clinical signs. UAAC tears were tested positive in viral cultures. After...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conjunctivitis; Glycosaminoglycans; Hyaluronic acid; Tear film.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100455

A carbohydrate-based mechanism of species recognition in sea urchin fertilization
Provedor de dados: 56
Autores: Mourão,P.A.S.
In the present review, we describe a systematic study of the sulfated polysaccharides from marine invertebrates, which led to the discovery of a carbohydrate-based mechanism of sperm-egg recognition during sea urchin fertilization. We have described unique polymers present in these organisms, especially sulfated fucose-rich compounds found in the egg jelly coat of sea urchins. The polysaccharides have simple, linear structures consisting of repeating units of oligosaccharides. They differ among the various species of sea urchins in specific patterns of sulfation and/or position of the glycosidic linkage within their repeating units. These polysaccharides show species specificity in inducing the acrosome reaction in sea urchin sperm, providing a clear-cut...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acrosome reaction; Fertilization; Sulfated fucans; Glycosaminoglycans; Sulfated galactans; Species diversity; Sperm-egg recognition.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000100002

A fucan from the brown seaweed Spatoglossum schröederi inhibits Chinese hamster ovary cell adhesion to several extracellular matrix proteins
Provedor de dados: 56
Autores: Rocha,H.A.O.; Franco,C.R.C.; Trindade,E.S.; Carvalho,L.C.M.; Veiga,S.S.; Leite,E.L.; Dietrich,C.P.; Nader,H.B.
Fucans, a family of sulfated polysaccharides present in brown seaweed, have several biological activities. Their use as drugs would offer the advantage of no potential risk of contamination with viruses or particles such as prions. A fucan prepared from Spatoglossum schröederi was tested as a possible inhibitor of cell-matrix interactions using wild-type Chinese hamster ovary cells (CHO-K1) and the mutant type deficient in xylosyltransferase (CHO-745). The effect of this polymer on adhesion properties with specific extracellular matrix components was studied using several matrix proteins as substrates for cell attachment. Treatment with the polymer inhibited the adhesion of fibronectin to both CHO-K1 (2 x 10(5))()and CHO-745 (2 x 10(5) and 5 x 10(5))...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CHO cells; Extracellular matrix proteins; Fucan; Glycosaminoglycans; Cell adhesion; Brown algae.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000500009

Cotransfected human chondrocytes: over-expression of IGF-I and SOX9 enhances the synthesis of cartilage matrix components collagen-II and glycosaminoglycans
Provedor de dados: 56
Autores: Simental-Mendía,M.; Lara-Arias,J.; Álvarez-Lozano,E.; Said-Fernández,S.; Soto-Domínguez,A.; Padilla-Rivas,G. R.; Martínez-Rodríguez,H. G.
Damage to cartilage causes a loss of type II collagen (Col-II) and glycosaminoglycans (GAG). To restore the original cartilage architecture, cell factors that stimulate Col-II and GAG production are needed. Insulin-like growth factor I (IGF-I) and transcription factor SOX9 are essential for the synthesis of cartilage matrix, chondrocyte proliferation, and phenotype maintenance. We evaluated the combined effect of IGF-I and SOX9 transgene expression on Col-II and GAG production by cultured human articular chondrocytes. Transient transfection and cotransfection were performed using two mammalian expression plasmids (pCMV-SPORT6), one for each transgene. At day 9 post-transfection, the chondrocytes that were over-expressing IGF-I/SOX9 showed 2-fold increased...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Type II collagen; Glycosaminoglycans; IGF-I/SOX9 transgenes; Human chondrocytes; Articular cartilage; Cotransfection.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015001201063

Dermatan sulfate reduces monocyte chemoattractant protein 1 and TGF-β production, as well as macrophage recruitment and myofibroblast accumulation in mice with unilateral ureteral obstruction
Provedor de dados: 56
Autores: Belmiro,C.L.R.; Gonçalves,R.G.; Kozlowski,E.O.; Werneck,A.F.; Takyia,C.M.; Leite-Jr.,M.; Pavão,M.S.G.
Selectins play an essential role in most inflammatory reactions, mediating the initial leukocyte-rolling event on activated endothelium. Heparin and dermatan sulfate (DS) bind and block P- and L-selectin function in vitro. Recently, we reported that subcutaneous administration of DS inhibits colon inflammation in rats by reducing macrophage and T-cell recruitment and macrophage activation. In the present study, we examined the effect of porcine intestinal mucosa DS on renal inflammation and fibrosis in mice after unilateral ureteral obstruction (UUO). Twenty-four adult male Swiss mice weighing 20-25 g were divided into 4 groups: group C (N = 6) was not subjected to any surgical manipulation; group SH (N = 6) was subjected to surgical manipulation but...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycosaminoglycans; Dermatan sulfate; Kidney; Inflammation.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000700003

Glycosaminoglycans affect the interaction of human plasma kallikrein with plasminogen, factor XII and inhibitors
Provedor de dados: 56
Autores: Gozzo,A.J.; Nunes,V.A.; Nader,H.B.; Dietrich,C.P.; Carmona,A.K.; Sampaio,M.U.; Sampaio,C.A.M.; Araújo,M.S.
Human plasma kallikrein, a serine proteinase, plays a key role in intrinsic blood clotting, in the kallikrein-kinin system, and in fibrinolysis. The proteolytic enzymes involved in these processes are usually controlled by specific inhibitors and may be influenced by several factors including glycosaminoglycans, as recently demonstrated by our group. The aim of the present study was to investigate the effect of glycosaminoglycans (30 to 250 µg/ml) on kallikrein activity on plasminogen and factor XII and on the inhibition of kallikrein by the plasma proteins C1-inhibitor and antithrombin. Almost all available glycosaminoglycans (heparin, heparan sulfate, bovine and tuna dermatan sulfate, chondroitin 4- and 6-sulfates) reduced (1.2 to 3.0 times) the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycosaminoglycans; Human plasma kallikrein; Plasminogen; Factor XII; C1-inhibitor; Antithrombin.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000800011

Astroglial cells derived from lateral and medial midbrain sectors differ in their synthesis and secretion of sulfated glycosaminoglycans
Provedor de dados: 56
Autores: Onofre,G.R.; Werneck,C.C.; Mendes,F.A.; Garcia-Abreu,J.; Moura Neto,V.; Cavalcante,L.A.; Silva,L.C.F.
Astroglial cells derived from lateral and medial midbrain sectors differ in their abilities to support neuritic growth of midbrain neurons in cocultures. These different properties of the two types of cells may be related to the composition of their extracellular matrix. We have studied the synthesis and secretion of sulfated glycosaminoglycans (GAGs) by the two cell types under control conditions and ß-D-xyloside-stimulated conditions, that stimulate the ability to synthesize and release GAGs. We have confirmed that both cell types synthesize and secrete heparan sulfate and chondroitin sulfate. Only slight differences were observed between the proportions of the two GAGs produced by the two types of cells after a 24-h labeling period. However, a marked...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycosaminoglycans; Astrocytes; Neuron-glia interactions; Midbrain.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000200014

Heparan sulfate and control of cell division: adhesion and proliferation of mutant CHO-745 cells lacking xylosyl transferase
Provedor de dados: 56
Autores: Franco,C.R.C.; Rocha,H.A.O.; Trindade,E.S.; Santos,I.A.N.; Leite,E.L.; Veiga,S.S.; Nader,H.B.; Dietrich,C.P.
We have examined the role of cell surface glycosaminoglycans in cell division: adhesion and proliferation of Chinese hamster ovary (CHO) cells. We used both wild-type (CHO-K1) cells and a mutant (CHO-745) which is deficient in the synthesis of proteoglycans due to lack of activity of xylosyl transferase. Using different amounts of wild-type and mutant cells, little adhesion was observed in the presence of laminin and type I collagen. However, when fibronectin or vitronectin was used as substrate, there was an enhancement in the adhesion of wild-type and mutant cells. Only CHO-K1 cells showed a time-dependent adhesion on type IV collagen. These results suggest that the two cell lines present different adhesive profiles. Several lines of experimental...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: CHO cells; Extracellular matrix proteins; Proteoglycans; Glycosaminoglycans; Cell adhesion; Cell proliferation.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000800001

Effect of castration on renal glycosaminoglycans and their urinary excretion in male and female rats with chronic renal failure
Provedor de dados: 56
Autores: Lemos,C.C.S.; Tovar,A.M.F.; Guimarães,M.A.M.; Bregman,R.
Glycosaminoglycans (GAGs) participate in a variety of processes in the kidney, and evidence suggests that gender-related hormones participate in renal function. The aim of this study was to analyze the relationship of GAGs, gender, and proteinuria in male and female rats with chronic renal failure (CRF). GAGs were analyzed in total kidney tissue and 24-h urine of castrated (c), male (M), and female (F) Wistar control (C) rats (CM, CMc, CF, CFc) and after 30 days of CRF induced by 5/6 nephrectomy (CRFM, CRFMc, CRFF, CRFFc). Total GAG quantification and composition were determined using agarose and polyacrylamide gel electrophoresis, respectively. Renal GAGs were higher in CF compared to CM. CRFM presented an increase in renal GAGs, heparan sulfate (HS), and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Castration; Chronic renal failure; Gender; Glycosaminoglycans; Proteinuria.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000700567

Purification and characterization of hyaluronic acid from chicken combs
Provedor de dados: 65
Autores: Rosa,Claudia Severo da; Tovar,Ana Freire; Mourão,Paulo; Pereira,Ricardo; Barreto,Pedro; Beirão,Luiz Henrique.
Hyaluronic acid (HA) is an important macromolecule in medical and pharmaceutical fields. The umbilical cord and the chicken comb are some of the tissues richest in this polysaccharide. The profit from obtaining HA from the combs of slaughtered animals is particularly attractive. This work aimed to extract, purify, and characterize HA. The glycosaminoglycan concentration in the chicken comb was found to be about 15µg of hexuronic acid mg-1 of dry tissue. Fractionation using ion exchange chromatography and subsequent identification of the fractions by agarose gel electrophoresis showed that HA corresponded to 90% of the total amount of extracted glycosaminoglycans.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycosaminoglycans; Chicken combs; Hexuronic acid.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000900026