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| Registros recuperados: 25 | |
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| Haseeb,Muhammad Tahir; Bashir,Sajid; Hussain,Muhammad Ajaz; Ashraf,Muhammad Umer; Erum,Alia; Naeem-ul-Hassan,Muhammad. |
| ABSTRACT Linseed hydrogel (LSH) was evaluated by acute toxicity for its potential application in oral drug delivery design. White albino mice and rabbits were divided in four groups (I-IV) and different doses of LSH (1, 2 and 5 g/kg body weight) were given except to the control group (I) that was left untreated. Rabbits were monitored for eye irritation, acute dermal toxicity and primary dermal irritation, whereas, body weight, food and water consumption, hematology and clinical biochemistry, gross necropsy and histopathology of vital organs were scrutinized in mice. LSH was considered safe after eye irritation test as no adverse signs or symptoms were seen in the eye. In dermal toxicity and irritation study, skin of treated rabbits was found normal in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Linseed hydrogel; Acute toxicity; Hematology; Clinical biochemistry; Polysaccharide. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502018000200610 |
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| 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 |
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| WANG,Chunmei; RUAN,Shiman; GU,Xunmei; ZHU,Bin. |
| Abstract This study investigated the antiviral activities of Radix Isatidis polysaccharide (RIP) against type II herpes simplex virus (HSV-2) in vitro. RIP was prepared from the Radix Isatidis root. The toxicity of RIP on Vero cells was detected. The direct killing effect of RIP on HSV-2, inhibitory effect of RIP on HSV-2 replication and inhibitory effect of RIP on HSV-2 adsorption were determined. Results showed that, RIP in concentration range of 25-800 mg/L had no toxic effect on Vero cells. RIP with different concentrations could not directly inactivate the HSV-2. The effective rates on inhibition of HSV-2 replication and adsorption in 800 mg/L RIP group were 71.57% and 48.37%, respectively, which were the highest among different groups. In conclusion,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Radix Isatidis; Polysaccharide; HSV-2. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000500180 |
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| Passerini, Delphine; Fecamp, Florian; Marchand, Laetitia; Kolypczuk, Laetitia; Bonnetot, Sandrine; Sinquin, Corinne; Verrez-bagnis, Veronique; Hervio Heath, Dominique; Colliec Jouault, Sylvia; Delbarre Ladrat, Christine. |
| In the marine environment, biofilm formation is an important lifestyle for microorganisms. A biofilm is comprised of cells embedded in an extracellular matrix that holds them close together and keeps the biofilm attached to the colonized surface. This predominant lifestyle and its main regulation pathway, namely quorum-sensing (QS), have been shown to induce specific bioactive metabolites. In this study, we investigated the biofilm formation by two marine bacteria belonging to the Vibrio species to discover potentially innovative bioactive compounds. We proposed a protocol to isolate biofilm extracts, to analyze their biochemical composition, and to compare them to planktonic cell extracts. Cells were grown attached to a plastic surface; extracts were... |
| Tipo: Text |
Palavras-chave: Vibrio; Biofilm; Polysaccharide; Quorum-sensing; Activity. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00592/70381/68461.pdf |
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| Matou, Sabine; Colliec-jouault, Sylvia; Galy Fauroux, Isabelle; Ratiskol, Jacqueline; Sinquin, Corinne; Guezennec, Jean; Fischer, Anne-marie; Helley, Dominique. |
| The aim of this study was to determine the angiogenic properties of an oversulfated exopolysaccharide (OS-EPS) derived from a polysaccharide secreted by the mesophilic bacterium Alteromonas infernus. We compared the effect of this OS-EPS with that of a non-oversulfated exopolysaccharide (EPS) on human umbilical vein endothelial cell (HUVEC) proliferation, migration and differentiation induced by basic fibroblast growth factor (FGF-2) or vascular endothelial growth factor (VEGF). OS-EPS enhanced HUVEC proliferation by 58% when used alone, and by respectively 30% and 70% in the presence of FGF-2 and VEGF. OS-EPS also increased the density of tubular structures on Matrigel in the presence of FGF-2 or VEGF. Vascular tube fort-nation was related to alpha(6)... |
| Tipo: Text |
Palavras-chave: Matrigel; Collagen gel; Alpha 6 integrin subunit; Angiogenic growth factor; Polysaccharide; Angiogenesis. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-2118.pdf |
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| HE,Suiqin; MA,Xiang; MENG,Qinggui; LU,Jianmin; QIN,Xiuhong; FANG,Shifeng; MA,Cong. |
| Abstract This study aimed to investigate the effects and mechanisms of water-soluble Semen cassiae polysaccharide (SCP) on retinitis pigmentosa (RP) in rats. One hundred rats were randomly divided into control, model, and 50, 100 and 200 mg/kg SCP groups. The 50, 100 and 200 mg/kg SCP groups were treated with 50, 100 and 200 mg/kg SCP for 5 days, respectively. On the sixth day, the model, and 50, 100 and 200 mg/kg SCP groups were treated with N-nitroso-N-methylurea (MNU). After 12 h and 5 days, the electroretinogram, retinal thickness, apoptosis of retinal photoreceptor cells, and expressions of apoptosis related protein in retina tissue were determined. Results showed that, after 12 h and on 5 days from MNU treatment, compared with model group, the a-wave... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Polysaccharide; Semen cassiae; Retinitis pigmentosa. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612020000100084 |
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| ZHAO,Yinjuan; XU,Lujia; HUA,Yunfen. |
| Abstract This study investigated the effect of Dendrobium officinale polysaccharide (DOP) on the adipogenic differentiation of rat bone marrow mesenchymal stem cells (BMSCs). DOP was extracted fresh Dendrobium officinale. Rat BMSCs were prepared, and then were treated with 0 (control), 50, 100, 200, 400, 800 μg/mL DOP, respectively. The cell viability was determined by MTT assay. The adipogenic differentiation was quantitatively analyzed by oil red O staining assay. The mRNA expressions of adipogenic differentiation related gene peroxisome proliferator-activated receptor gamma (PPARG), lipoprotein lipase (LPL) and fatty acid binding protein 4 (FABP4) were detected by RT-PCR. Results showed that, DOP with 0-800 μg/mL concentration had no significant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dendrobium officinale; Polysaccharide; Bone marrow mesenchymal stem cells; Adipogenic differentiation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000200303 |
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| Li,Peiqin; Luo,Haiyu; Meng,Jiajia; Sun,Weibo; Wang,Xiaohan; Lu,Shiqiong; Peng,Youliang; Zhou,Ligang. |
| Background Three oligosaccharides (EOS, WOS and SOS) were respectively prepared from the corresponding polysaccharides, namely exopolysaccharide (EPS), water-extracted mycelial polysaccharide (WPS) and sodium hydroxide-extracted mycelial polysaccharides (SPS) from the endophytic fungus Fusarium oxysporum Dzf17. In this study, the effects of EOS, WOS and SOS on the activities of the defense-related enzymes, namely phenylalanine ammonia lyase (PAL), polyphenoloxidase (PPO) and peroxidase (POD) in its host plant Dioscorea zingiberensis cultures were investigated. Results For the suspension cell cultures of D. zingiberensis, the highest PAL activity was induced by 0.5 mg/mL of WOS at 48 h after treatment, which was 4.55-fold as that of control. Both PPO and... |
| Tipo: Journal article |
Palavras-chave: Endophytic fungus; Phenylalanine ammonia lyase; Peroxidase; Polyphenoloxidase; Polysaccharide. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000400003 |
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| Darolt,Josiane Cecília; Rocha Neto,Argus Cezar da; Di Piero,Robson Marcelo. |
| Abstract Apple is one of the most important temperate fruit to Brazil economy, and the use of synthetic chemicals has been the main method for reducing postharvest diseases, such as the blue mold, caused by Penicillium expansum. This work intends to evaluate the practical utilization of chitosan for blue mold control. For this purpose, fruits were treated in a preventive and curative way, immersing the fruits in chitosan solution (5 or 10 mg mL-1), or adding a single drop of this solution (10 mg mL-1) directly into the injuries. The eradicative effect of the polysaccharide was also evaluated in vitro and in vivo. Chitosan did not show a curative effect against the blue mold, and its eradicative effect was only evidenced on the higher concentration (10 mg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial activity; Alternative control; Chitosan; Malus domestica; Polysaccharide. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000401014 |
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| Araújo,R.V.S.; Melo-Júnior,M.R.; Beltrão,E.I.C.; Mello,L.A.; Iacomini,M.; Carneiro-Leão,A.M.A.; Carvalho Jr,L.B.; Santos-Magalhães,N.S.. |
| The antischistosomal activity of the sulfated polysaccharide α-D-glucan (Glu.SO4) extracted from Ramalina celastri was evaluated after encapsulation into liposomes (Glu.SO4-LIPO) in Schistosoma mansoni-infected mice. The effect of treatment with Glu.SO4 and Glu.SO4-LIPO (10 mg/kg) on egg elimination, worm burden and hepatic granuloma formation was assessed using female albino Swiss mice, 35-40 days of age, weighing 25 ± 2 g, infected with 150 cercariae/animal (Biomphalaria glabrata, BH strain). Four groups (N = 10) were studied, two controls (empty liposomes and NaCl) and two treated groups (Glu.SO4-LIPO and Glu.SO4) using a single dose. Parasitological analysis revealed that Glu.SO4-LIPO was as efficient as Glu.SO4 in reducing egg elimination and worm... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Polysaccharide; Α-D-glucan; Ramalina celastri; Liposomes; Schistosoma mansoni; Lectin histochemistry. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000400007 |
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| Zou,Yu; Jiang,Aili; Tian,Mixia. |
| AbstractThe extraction conditions (liquid-solid ratio, temperature and time) of antioxidant polysaccharides from Auricularia auricula fruiting bodies (AAFB) were optimized using response surface methodology (RSM). The Box-Behnken experimental results showed the optimum extraction conditions as follows: a liquid-solid ratio of 38.77 mL/g, a temperature of 93.98 °C and a time of 3.41 h. Under these conditions, the maximal polysaccharide yield was 10.46 g/100 g. In addition, AAFB polysaccharides exhibited stronger antioxidant activities by evaluating of Fe2+-chelating ability and hydroxyl radical scavenging activity with IC50 values of 0.43 and 0.38 mg/mL, respectively. These results indicated that AAFB polysaccharides might be potentially used as a natural... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Auricularia auricula; Polysaccharide; Extraction; Antioxidant activity. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612015000300428 |
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| Yan,Fen; Yang,Xuena; Liu,Chang; Huang,Shangrong; Liao,Lan; Fu,Caili. |
| Orthogonal design was employed to study the effect of extraction time, temperature and liquid-to-solid ratio on the production of antioxidant polysaccharides from leaves of Gynura bicolor (PLG). Analysis of variance was performed on the data obtained. The most relevant variable was extraction time. A liquid-solid ratio of 30:1 (v/w), a temperature of 80 °C and an extraction time of 3 h were found to be optimal for PLG. The optimal extraction yield of 4.9% was obtained through additional verification test. Hydroxyl radical-scavenging activity, reducing power and ferrous ion chelating ability of PLG were determined. PLG possess concentration-dependent antioxidant potency and IC50 of PLG was 4.67, 0.24 and 4.31 mg/mL for hydroxyl radical-scavenging and ferric... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gynura bicolor; Polysaccharide; Orthogonal design; Antioxidant activity. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612014000200027 |
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| Sun,Q; Shen,M; Li,F; Liu,J; Lu,L; Zhu,M; Yuan,D. |
| ABSTRACT Reticuloendotheliosis virus (REV) infection has frequently affected the poultry industry in recent years. The infection with REV weakens the immune responses of the infected poultry. It is reported that Enteromorphaclathrata polysaccharides are capable of regulating immune function. In order to investigate the immuno regulatory effects of Enteromorphaclathrata polysaccharides (EPS) on the response of REV-infected broilers to a live attenuated Newcastle disease (ND) vaccine. Broilers were intraperitoneally injected with REV at one day of age, subcutaneously infected with EPS at 2 days of age, and vaccinated by nasal drip with a live attenuated ND (Lasota strain) vaccine at 5 days of age. Immune organ index, secretory immunoglobulinA (SIgA),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Polysaccharide; Reticuloendotheliosis Virus; ND attenuated vaccine; Chicken; Immunoregulation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400601 |
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| LI,Yibin; CHEN,Junchen; LAI,Pufu; TANG,Baosha; WU,Li. |
| Abstract Instant Tremella fuciformis is ready to eat after adding hot water and is a delicious edible mushroom food. However, the drying method affects the quality of product. The present work evaluated the effects of freeze drying (FD), microwave drying (MD), and hot air drying (HAD) on shrinkage ratio, rehydration ratio, microstructure, polysaccharide and free amino acids of instant Tremella fuciformis. These three drying methods significantly changed the color and reduced the total amount of amino acids of dried products. FD sample possessed a three-dimensional network with porous, loose and large voids, so it had a slighter shrinkage and a better rehydration effect compared with the MD and HAD one. The polysaccharide content, uronic acid content and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Freeze drying; Color; Microstructure; Polysaccharide; Free amino acids. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019005000314 |
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| ZHANG,Liying; WANG,Fabao; REN,Xiubao. |
| Abstract This study investigated the inhibitory effect of Dendrobium officinale polysaccharide (DOPA) on human gastric cancer cell SGC-7901 xenografts in nude mice. The nude mice with SGC-7901 xenografts were randomly divided into model, 5-fluorouracil (5-Fu), low-dose DOPA, middle-dose DOPA and high-dose DOPA group. The later four groups were intragastrically administrated with 100, 200 and 400 mg·kg–1·day–1 DOPA, 400 mg·kg–1·day–1 5-Fu and normal saline, respectively. After treatment for 20 days, the tumor inhibition rate of in high-dose DOPA group was basically equivalent to 5-Fu group. Compared with 5-Fu, DOPA had no obvious toxic side effect on spleen or thymus indexes, routine blood indexes or liver and kidney functions of nude mice. Compared with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dendrobium officinale; Polysaccharide; Gastric cancer; Nude mice. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000100078 |
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| Cruz,Mabel Ribeiro da; Morais,João Paulo Saraiva; Muniz,Celli Rodrigues; Rosa,Morsyleide de Freitas; Souza Filho,Men de Sá Moreira de; Azeredo,Henriette Monteiro Cordeiro de. |
| Abstract: The objective of this work was to determine a suitable combination of the polysaccharide mesquite seed gum (MSG) and the protein Nile tilapia fish gelatin in the composite MSG/gelatin film for food packaging applications, and to evaluate the effect of cellulose nanocrystals (CNCs) on the film. MSG and gelatin were extracted from mesquite seeds and Nile tilapia residues, respectively, and the CNCs from mesquite pods by acid hydrolysis. The MSG:gelatin ratio with the best combination of tensile and barrier properties was used to produce the bionanocomposite films, by adding different CNC contents to the MSG/gelatin dispersion. The MSG:gelatin ratio of 1:1 had a good combination of water vapor permeability (WVP) and tensile strength. The properties... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Prosopis juliflora; Bionanocomposites; Packaging; Polysaccharide; Protein. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000400495 |
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| Baruque-Ramos,Júlia; Hiss,Haroldo; Vicentin,Márcio Alberto; Paz,Marcelo Fossa da; Peixoto,Argélia; Leal,Maria Betania Batista; Sato,Rony Akio; Vassoler,Umbelina Macedo; Raw,Isaías. |
| Capsular polysaccharide, extracted from microorganism cultivations, is the principal antigen for elaboration of vaccine against the disease caused by Neisseria meningitidis serogroup C. The final protein content allowed in this vaccine is 1%. In order to find a relationship between nitrogen consumption and cell growth, including polysaccharide production, and cell nitrogen content, cultivations were carried out in an 80 liters bioreactor (total capacity), under the following conditions: Frantz medium; temperature of 35ºC; air flow of 5 L/min (0.125 vvm); agitation frequency of 120 rpm and vessel pressure of 6 psi (kLa = 0.07 min-1). Concentrations of biomass, total polysaccharide, cellular nitrogen, residual organic and inorganic nitrogen in the medium... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: N. meningitidis; Vaccine; Polysaccharide; Nitrogen. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822001000400010 |
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| Registros recuperados: 25 | |
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