Base de dados : MEDLINE
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[PMID]:29309430
[Au] Autor:Lilly JL; Gottipati A; Cahall CF; Agoub M; Berron BJ
[Ad] Endereço:Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky, United States of America.
[Ti] Título:Comparison of eosin and fluorescein conjugates for the photoinitiation of cell-compatible polymer coatings.
[So] Source:PLoS One;13(1):e0190880, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Targeted photopolymerization is the basis for multiple diagnostic and cell encapsulation technologies. While eosin is used in conjunction with tertiary amines as a water-soluble photoinitiation system, eosin is not widely sold as a conjugate with antibodies and other targeting biomolecules. Here we evaluate the utility of fluorescein-labeled bioconjugates to photopolymerize targeted coatings on live cells. We show that although fluorescein conjugates absorb approximately 50% less light energy than eosin in matched photopolymerization experiments using a 530 nm LED lamp, appreciable polymer thicknesses can still be formed in cell compatible environments with fluorescein photosensitization. At low photoinitiator density, eosin allows more sensitive initiation of gelation. However at higher functionalization densities, the thickness of fluorescein polymer films begins to rival that of eosin. Commercial fluorescein-conjugated antibodies are also capable of generating conformal, protective coatings on mammalian cells with similar viability and encapsulation efficiency as eosin systems.
[Mh] Termos MeSH primário: Materiais Revestidos Biocompatíveis
Amarelo de Eosina-(YS)/química
Fluoresceína/química
Luz
Polímeros/química
[Mh] Termos MeSH secundário: Células A549
Seres Humanos
Análise Serial de Proteínas
Espectrofotometria Ultravioleta
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL
[Nm] Nome de substância:
0 (Coated Materials, Biocompatible); 0 (Polymers); TDQ283MPCW (Eosine Yellowish-(YS)); TPY09G7XIR (Fluorescein)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180109
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190880


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[PMID]:29214535
[Au] Autor:Mijangos L; Ziarrusta H; Olivares M; Zuloaga O; Möder M; Etxebarria N; Prieto A
[Ad] Endereço:Department of Analytical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080, Bilbao, Spain.
[Ti] Título:Simultaneous determination of 41 multiclass organic pollutants in environmental waters by means of polyethersulfone microextraction followed by liquid chromatography-tandem mass spectrometry.
[So] Source:Anal Bioanal Chem;410(2):615-632, 2018 Jan.
[Is] ISSN:1618-2650
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:A new procedure using polyethersulfone (PES) microextraction followed by liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis was developed in this work for the simultaneous determination of 41 multiclass priority and emerging organic pollutants including herbicides, hormones, personal care products, and pharmaceuticals, among others, in seawater, wastewater treatment plant (WWTP) effluents, and estuary samples. The optimization of the analysis included two different chromatographic columns and different variables (polarity, fragmentor voltage, collision energy, and collision cell accelerator) of the mass spectrometer. In the case of PES extraction, ion strength of the water, pH, addition of EDTA, and the amount of the polymeric material were thoroughly investigated. The developed procedure was compared with a previously validated one based on a standard solid-phase extraction (SPE). In contrast to the SPE protocol, the PES method allowed a cost-efficient extraction of complex aqueous samples with lower matrix effect from 120 mL of water sample. Satisfactory and comparable apparent recovery values (80-119 and 70-131%) and method quantification limits (MQLs, 0.4-26 and 0.2-23 ng/L) were obtained for PES and SPE procedures, respectively, regardless of the matrix. Repeatability values lower than 27% were obtained. Finally, the developed methods were applied to the analysis of real samples from the Basque Country and irbesartan, valsartan, acesulfame, and sucralose were the analytes most often detected at the highest concentrations (51-1096 ng/L). Graphical abstract Forty-one multiclass pollutant determination in environmental waters by means of PES/SPE-LC-MS/MS.
[Mh] Termos MeSH primário: Herbicidas/análise
Hormônios/análise
Preparações Farmacêuticas/análise
Polímeros/química
Extração em Fase Sólida/métodos
Sulfonas/química
Espectrometria de Massas em Tandem/métodos
Poluentes Químicos da Água/análise
[Mh] Termos MeSH secundário: Cromatografia Líquida/métodos
Estuários
Limite de Detecção
Água do Mar/análise
Águas Residuais/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE; VALIDATION STUDIES
[Nm] Nome de substância:
0 (Herbicides); 0 (Hormones); 0 (Pharmaceutical Preparations); 0 (Polymers); 0 (Sulfones); 0 (Waste Water); 0 (Water Pollutants, Chemical); 25667-42-9 (polyether sulfone)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171208
[St] Status:MEDLINE
[do] DOI:10.1007/s00216-017-0763-2


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[PMID]:29184996
[Au] Autor:Liu J; Liang Y; Shen J; Bai Q
[Ad] Endereço:Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, Modern Separation Science Key Laboratory of Shaanxi Province, College of Chemistry & Materials Science, Northwest University, Xi'an, Shaanxi, 710069, China. jwliu@nwu.edu.cn.
[Ti] Título:Polymeric ionic liquid-assembled graphene-immobilized silica composite for selective isolation of human serum albumin from human whole blood.
[So] Source:Anal Bioanal Chem;410(2):573-584, 2018 Jan.
[Is] ISSN:1618-2650
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Polymeric ionic liquids (PILs) with 1-vinyl-3-ethylimidazolium cations and two different anions of Br and PF were assembled onto the surface of graphene (G) nanosheets. The derived two composites, i.e., PIL(Br)-G and PIL(PF )-G, were further efficiently immobilized onto the surface of silica nanoparticles via self-assembly technique. The obtained two PIL-G/SiO nanocomposites exhibited diverse adsorption performances toward proteins through adjusting the anions of PILs. Electrostatic attractions between proteins and the nanocomposites dominated protein adsorption, while the presence of PF anions weakened electrostatic interactions and deteriorated the selective adsorption of target protein, i.e., bovine serum albumin (BSA) in this case. Specifically, PIL(Br)-G/SiO nanocomposite displayed high selectivity toward BSA and a high adsorption efficiency of ca. 98% was achieved for 100 mg L BSA in a Britton-Robinson (B-R) buffer at pH 5. HPLC analysis demonstrated the selectivity of PIL(Br)-G/SiO nanocomposite toward BSA in the presence of abundant hemoglobin and cytochrome c. The practical applicability was verified by performing selective isolation of human serum albumin (HSA) from human whole blood. Graphical abstract Selective isolation of human serum albumin from blood by polymeric ionic liquid assembled graphene immobilized silica nanocomposite with tunable anions.
[Mh] Termos MeSH primário: Grafite/química
Líquidos Iônicos/química
Polímeros/química
Albumina Sérica Humana/isolamento & purificação
Dióxido de Silício/química
[Mh] Termos MeSH secundário: Adsorção
Ânions/química
Seres Humanos
Concentração de Íons de Hidrogênio
Nanocompostos/química
Eletricidade Estática
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anions); 0 (Ionic Liquids); 0 (Polymers); 7631-86-9 (Silicon Dioxide); 7782-42-5 (Graphite); ZIF514RVZR (Serum Albumin, Human)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171130
[St] Status:MEDLINE
[do] DOI:10.1007/s00216-017-0758-z


  4 / 73029 MEDLINE  
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[PMID]:28449750
[Au] Autor:Brignardello-Petersen R
[Ti] Título:Low incidence and slow progression of caries in children consuming polyol-containing candies, but no differences important to patients consuming polyols.
[So] Source:J Am Dent Assoc;148(5):e46, 2017 05.
[Is] ISSN:1943-4723
[Cp] País de publicação:England
[La] Idioma:eng
[Mh] Termos MeSH primário: Doces
Cárie Dentária
[Mh] Termos MeSH secundário: Criança
Seres Humanos
Incidência
Polímeros
[Pt] Tipo de publicação:JOURNAL ARTICLE; COMMENT
[Nm] Nome de substância:
0 (Polymers); 0 (polyol)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180306
[Lr] Data última revisão:
180306
[Sb] Subgrupo de revista:D; IM
[Da] Data de entrada para processamento:170429
[St] Status:MEDLINE


  5 / 73029 MEDLINE  
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[PMID]:29311546
[Au] Autor:Yang JE; Park SJ; Kim WJ; Kim HJ; Kim BJ; Lee H; Shin J; Lee SY
[Ad] Endereço:Metabolic and Biomolecular Engineering National Research Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Plus Program), Center for Systems and Synthetic Biotechnology, Institute for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Repu
[Ti] Título:One-step fermentative production of aromatic polyesters from glucose by metabolically engineered Escherichia coli strains.
[So] Source:Nat Commun;9(1):79, 2018 01 08.
[Is] ISSN:2041-1723
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Aromatic polyesters are widely used plastics currently produced from petroleum. Here we engineer Escherichia coli strains for the production of aromatic polyesters from glucose by one-step fermentation. When the Clostridium difficile isocaprenoyl-CoA:2-hydroxyisocaproate CoA-transferase (HadA) and evolved polyhydroxyalkanoate (PHA) synthase genes are overexpressed in a D-phenyllactate-producing strain, poly(52.3 mol% 3-hydroxybutyrate (3HB)-co-47.7 mol% D-phenyllactate) can be produced from glucose and sodium 3HB. Also, various poly(3HB-co-D-phenyllactate) polymers having 11.0, 15.8, 20.0, 70.8, and 84.5 mol% of D-phenyllactate are produced from glucose as a sole carbon source by additional expression of Ralstonia eutropha ß-ketothiolase (phaA) and reductase (phaB) genes. Fed-batch culture of this engineered strain produces 13.9 g l of poly(61.9 mol% 3HB-co-38.1 mol% D-phenyllactate). Furthermore, different aromatic polyesters containing D-mandelate and D-3-hydroxy-3-phenylpropionate are produced from glucose when feeding the corresponding monomers. The engineered bacterial system will be useful for one-step fermentative production of aromatic polyesters from renewable resources.
[Mh] Termos MeSH primário: Escherichia coli/metabolismo
Fermentação
Glucose/metabolismo
Engenharia Metabólica/métodos
Poliésteres/metabolismo
[Mh] Termos MeSH secundário: Ácido 3-Hidroxibutírico/metabolismo
Acetil-CoA C-Aciltransferase/genética
Acetil-CoA C-Aciltransferase/metabolismo
Aciltransferases/genética
Aciltransferases/metabolismo
Proteínas de Bactérias/genética
Proteínas de Bactérias/metabolismo
Clostridium difficile/enzimologia
Clostridium difficile/genética
Coenzima A-Transferases/genética
Coenzima A-Transferases/metabolismo
Cupriavidus necator/enzimologia
Cupriavidus necator/genética
Escherichia coli/genética
Lactatos/metabolismo
Oxirredutases/genética
Oxirredutases/metabolismo
Polietilenotereftalatos/metabolismo
Polímeros/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Bacterial Proteins); 0 (Lactates); 0 (Polyesters); 0 (Polyethylene Terephthalates); 0 (Polymers); 156-05-8 (3-phenyllactic acid); EC 1.- (Oxidoreductases); EC 2.3.- (Acyltransferases); EC 2.3.1.- (poly(3-hydroxyalkanoic acid) synthase); EC 2.3.1.16 (Acetyl-CoA C-Acyltransferase); EC 2.8.3.- (Coenzyme A-Transferases); IY9XDZ35W2 (Glucose); TZP1275679 (3-Hydroxybutyric Acid)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180110
[St] Status:MEDLINE
[do] DOI:10.1038/s41467-017-02498-w


  6 / 73029 MEDLINE  
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[PMID]:29184406
[Au] Autor:Yuan M; Ding S; Meng T; Lu B; Shao S; Zhang X; Yuan H; Hu F
[Ad] Endereço:Institute of Marine Biology, Ocean College, Zhejiang University, Zhoushan.
[Ti] Título:Effect of A-317491 delivered by glycolipid-like polymer micelles on endometriosis pain.
[So] Source:Int J Nanomedicine;12:8171-8183, 2017.
[Is] ISSN:1178-2013
[Cp] País de publicação:New Zealand
[La] Idioma:eng
[Ab] Resumo:Endometriosis is a common gynecological disease with a lack of effective clinical treatment. Current therapy often results in endometriosis pain recurrence and serious side effects. P2X receptor, an adenosine triphosphate (ATP)-gated ion channel, might be implicated in endometriosis pain. In this study, chitosan oligosaccharide-g-stearic acid (CSOSA) polymer micelles-coated nanostructured lipid carriers (NLCs) were developed as a novel delivery system for A-317491, a selective P2X receptor antagonist for endometriosis pain therapy. A-317491-loaded NLC (NLC/A-317491) could be coated by CSOSA micelles to form CSOSA/NLC/A-317491 nanoparticles. Pheochromocytoma PC12 cells, which highly expressed P2X receptors, were used as a cell model, and the CSOSA/NLC/A-317491 partly blocked the Ca influx induced by ATP stimulation. In nude mouse and rat endometriotic models, CSOSA/NLC could accumulate into endometriotic lesions after vein injection. In endometriotic rats, CSOSA/NLC/A-317491 reversed mechanical and heat hyperalgesia with long-term efficacy, which might be attributed to the massive CSOSA/NLC/A-317491 distribution in the endometriotic lesions. In conclusion, A-317491 delivered by CSOSA/NLC nanoparticles attenuated endometriosis pain in rats, and CSOSA/NLC/A-317491 could be used as an effective treatment strategy for P2X -targeted therapy in endometriosis pain.
[Mh] Termos MeSH primário: Sistemas de Liberação de Medicamentos/métodos
Endometriose/tratamento farmacológico
Nanopartículas/administração & dosagem
Dor/tratamento farmacológico
Fenóis/administração & dosagem
Compostos Policíclicos/administração & dosagem
[Mh] Termos MeSH secundário: Animais
Feminino
Glicolipídeos/química
Seres Humanos
Camundongos Nus
Micelas
Nanopartículas/química
Oligossacarídeos/química
Células PC12
Fenóis/química
Fenóis/farmacologia
Compostos Policíclicos/química
Compostos Policíclicos/farmacologia
Polímeros/química
Antagonistas do Receptor Purinérgico P2X/farmacologia
Ratos
Receptores Purinérgicos P2X3
Ácidos Esteáricos/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (A-317491); 0 (Glycolipids); 0 (Micelles); 0 (Oligosaccharides); 0 (Phenols); 0 (Polycyclic Compounds); 0 (Polymers); 0 (Purinergic P2X Receptor Antagonists); 0 (Receptors, Purinergic P2X3); 0 (Stearic Acids); 4ELV7Z65AP (stearic acid)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171130
[St] Status:MEDLINE
[do] DOI:10.2147/IJN.S146569


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[PMID]:29342216
[Au] Autor:Narayanaswamy VP; Giatpaiboon SA; Uhrig J; Orwin P; Wiesmann W; Baker SM; Townsend SM
[Ad] Endereço:Synedgen, Inc., Claremont, California, United States of America.
[Ti] Título:In Vitro activity of novel glycopolymer against clinical isolates of multidrug-resistant Staphylococcus aureus.
[So] Source:PLoS One;13(1):e0191522, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The incidence of multidrug-resistant (MDR) organisms, including methicillin-resistant Staphylococcus aureus (MRSA), is a serious threat to public health. Progress in developing new therapeutics is being outpaced by antibiotic resistance development, and alternative agents that rapidly permeabilize bacteria hold tremendous potential for treating MDR infections. A new class of glycopolymers includes polycationic poly-N (acetyl, arginyl) glucosamine (PAAG) is under development as an alternative to traditional antibiotic strategies to treat MRSA infections. This study demonstrates the antibacterial activity of PAAG against clinical isolates of methicillin and mupirocin-resistant Staphylococcus aureus. Multidrug-resistant S. aureus was rapidly killed by PAAG, which completely eradicated 88% (15/17) of all tested strains (6-log reduction in CFU) in ≤ 12-hours at doses that are non-toxic to mammalian cells. PAAG also sensitized all the clinical MRSA strains (17/17) to oxacillin as demonstrated by the observed reduction in the oxacillin MIC to below the antibiotic resistance breakpoint. The effect of PAAG and standard antibiotics including vancomycin, oxacillin, mupirocin and bacitracin on MRSA permeability was studied by measuring propidium iodide (PI) uptake by bacterial cells. Antimicrobial resistance studies showed that S. aureus developed resistance to PAAG at a rate slower than to mupirocin but similar to bacitracin. PAAG was observed to resensitize drug-resistant S. aureus strains sampled from passage 13 and 20 of the multi-passage resistance study, reducing MICs of mupirocin and bacitracin below their clinical sensitivity breakpoints. This class of bacterial permeabilizing glycopolymers may provide a new tool in the battle against multidrug-resistant bacteria.
[Mh] Termos MeSH primário: Antibacterianos/farmacologia
Glucosamina/análogos & derivados
Staphylococcus aureus Resistente à Meticilina/efeitos dos fármacos
Polímeros/farmacologia
Polissacarídeos/farmacologia
[Mh] Termos MeSH secundário: Antibacterianos/química
Farmacorresistência Bacteriana Múltipla
Glucosamina/química
Glucosamina/farmacologia
Glicosídeos
Seres Humanos
Técnicas In Vitro
Resistência a Meticilina
Staphylococcus aureus Resistente à Meticilina/isolamento & purificação
Staphylococcus aureus Resistente à Meticilina/metabolismo
Testes de Sensibilidade Microbiana
Mupirocina/farmacologia
Permeabilidade/efeitos dos fármacos
Polímeros/química
Polissacarídeos/química
Propídio/farmacocinética
Infecções Estafilocócicas/tratamento farmacológico
Infecções Estafilocócicas/microbiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Anti-Bacterial Agents); 0 (Glycosides); 0 (Polymers); 0 (Polysaccharides); 0 (pinocembrin 7-O-apiosyl(1-5)apiosyl(1-2)glucopyranoside); 0 (poly-N (acetyl, arginyl)glucosamine); 36015-30-2 (Propidium); D0GX863OA5 (Mupirocin); N08U5BOQ1K (Glucosamine)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180302
[Lr] Data última revisão:
180302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180118
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191522


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[PMID]:29223426
[Au] Autor:Motta FL; Stoyanov SR; Soares JBP
[Ad] Endereço:Natural Resources Canada, CanmetENERGY in Devon, 1 Oil Patch Drive, Devon, AB T9G 1A8, Canada; Department of Chemical and Materials Engineering, University of Alberta, 9211 116 St, Edmonton, AB T6G 1H9, Canada.
[Ti] Título:Application of solidifiers for oil spill containment: A review.
[So] Source:Chemosphere;194:837-846, 2018 Mar.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The need for new and/or improvement of existing oil spill remediation measures has increased substantially amidst growing public concern with the increased transportation of unconventional crudes, such as diluted bitumen products. Solidifiers may be a very good spill response measure to contain and mitigate the effects of oil discharge incidents, as these interact with the oil to limit hydrocarbon release into air and water, prevent it from adhering onto sediment and debris, and could allow for oil recovery and reuse. Solidifiers change the physical state of the spilled oil from liquid to a coherent mass by chemical interactions between the spilled oil and the solidifier. Currently, the use of solidifiers is limited to small spills near shorelines. To extend their use to large-scale spill containment operations, it is necessary to understand the mechanism of solidifier action and to establish consistent criteria for evaluation of their effectiveness. The research effort to date has been focused mainly on gelators and cross-linking agents, with particularly impressive advancements in the areas of phase-selective polymeric and small-molecule gelators. Substantial research efforts are needed to improve solidifier performance and integrate solidifiers as part of spill response procedures, particularly for acute oil spills involving unconventional petroleum products.
[Mh] Termos MeSH primário: Recuperação e Remediação Ambiental/métodos
Poluição por Petróleo/prevenção & controle
[Mh] Termos MeSH secundário: Géis/química
Poluição por Petróleo/análise
Polímeros/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Gels); 0 (Polymers)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180228
[Lr] Data última revisão:
180228
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171211
[St] Status:MEDLINE


  9 / 73029 MEDLINE  
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[PMID]:28452963
[Au] Autor:Yan X; Tong Z; Chen Y; Mo Y; Feng H; Li P; Qu X; Jin S
[Ad] Endereço:School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, China. yanxt911218@163.com.
[Ti] Título:Bioresponsive Materials for Drug Delivery Based on Carboxymethyl Chitosan/Poly(γ-Glutamic Acid) Composite Microparticles.
[So] Source:Mar Drugs;15(5), 2017 Apr 28.
[Is] ISSN:1660-3397
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:Carboxymethyl chitosan (CMCS) microparticles are a potential candidate for hemostatic wound dressing. However, its low swelling property limits its hemostatic performance. Poly(γ-glutamic acid) (PGA) is a natural polymer with excellent hydrophilicity. In the current study, a novel CMCS/PGA composite microparticles with a dual-network structure was prepared by the emulsification/internal gelation method. The structure and thermal stability of the composite were determined by Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The effects of preparation conditions on the swelling behavior of the composite were investigated. The results indicate that the swelling property of CMCS/PGA composite microparticles is pH sensitive. Levofloxacin (LFX) was immobilized in the composite microparticles as a model drug to evaluate the drug delivery performance of the composite. The release kinetics of LFX from the composite microparticles with different structures was determined. The results suggest that the CMCS/PGA composite microparticles are an excellent candidate carrier for drug delivery.
[Mh] Termos MeSH primário: Quitosana/análogos & derivados
Ácido Poliglutâmico/análogos & derivados
[Mh] Termos MeSH secundário: Quitosana/química
Portadores de Fármacos/química
Sistemas de Liberação de Medicamentos/métodos
Cinética
Espectroscopia Fotoeletrônica/métodos
Ácido Poliglutâmico/química
Polímeros/química
Espectroscopia de Infravermelho com Transformada de Fourier/métodos
Termogravimetria/métodos
Difração de Raios X/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Drug Carriers); 0 (Polymers); 0 (carboxymethyl-chitosan); 0 (poly(gamma-glutamic acid)); 25513-46-6 (Polyglutamic Acid); 9012-76-4 (Chitosan)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180228
[Lr] Data última revisão:
180228
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170429
[St] Status:MEDLINE


  10 / 73029 MEDLINE  
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[PMID]:29411802
[Au] Autor:Patel K; Singh N; Yadav J; Nayak JM; Sahoo SK; Lata J; Chand D; Kumar S; Kumar R
[Ad] Endereço:Department of Applied Chemistry, S.V. National Institute of Technology, Surat-395007, Gujarat, India. rajenderkumar@chem.svnit.ac.in.
[Ti] Título:Polydopamine films change their physicochemical and antimicrobial properties with a change in reaction conditions.
[So] Source:Phys Chem Chem Phys;20(8):5744-5755, 2018 Feb 21.
[Is] ISSN:1463-9084
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The morphology and physicochemical properties of polydopamine are not totally inherent and undergo changes with differing reaction conditions like the choice of solvent used for polymerization. The polymerisation of dopamine to polydopamine carried out in different solvents like sodium hydroxide, sodium bicarbonate, PBS and Tris leads to polydopamine with exceptionally different morphological and physicochemical features with each solvent. Additionally, the different physicochemical characteristics and morphologies bestow the polymer films with different extents of antimicrobial activity. Moreover, the findings supported by chemical evidence from X-ray photoelectron spectroscopy reveal that higher antibacterial activities were obtained against E. coli and S. aureus with polydopamine films prepared by Tris and NaOH solvent induced polymerization. The antibacterial activity observed in saline was found to be higher than that in PBS medium for both E. coli and S. aureus. The higher antibacterial activity of polydopamine films prepared in Tris and NaOH solvents was attributed to the covalent incorporation of -OH groups on the surface provided by nucleophilic Tris and NaOH solvents during the polymerisation process. The distinct physicochemical and morphological changes were supported by the results from contact angle measurements, FE-SEM, EDAX, AFM, and XPS analysis. The present finding provides insight into the different chemistry, morphologies and properties of the designed polydopamine films with controlled antibacterial/antifouling properties. Additionally, new insights into the mechanism of formation, physicochemical changes in morphology and properties of polydopamine coatings were revealed.
[Mh] Termos MeSH primário: Antibacterianos/farmacologia
Escherichia coli/efeitos dos fármacos
Indóis/farmacologia
Polímeros/farmacologia
Staphylococcus aureus/efeitos dos fármacos
[Mh] Termos MeSH secundário: Antibacterianos/síntese química
Antibacterianos/química
Química Física
Escherichia coli/citologia
Indóis/síntese química
Indóis/química
Testes de Sensibilidade Microbiana
Estrutura Molecular
Tamanho da Partícula
Polímeros/síntese química
Polímeros/química
Staphylococcus aureus/citologia
Propriedades de Superfície
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Bacterial Agents); 0 (Indoles); 0 (Polymers); 0 (polydopamine)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180227
[Lr] Data última revisão:
180227
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180208
[St] Status:MEDLINE
[do] DOI:10.1039/c7cp08406d



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