Consulta: subjectFacets:"APTT test"
Registros recuperados: 3
Data/hora: 13/06/2024 08:54:00

Glicosaminoglicanos isolados da pele de palombeta (Chloroscombrus chrysurus) e guaiúba (Ocyurus chrysurus): características e implicações biológicas - doi: 10.4025/actascibiolsci.v34i2.6056
Provedor de dados: 3
Autores: Rodrigues, José Ariévilo Gurgel; Rede Nordeste de Biotecnologia; Vanderlei, Edfranck de Sousa Oliveira; Universidade Federal do Ceará; Quinderé, Ana Luíza Gomes; Universidade Federal do Ceará; Fontes, Bruno Pedrosa; Universidade Federal do Ceará; Queiroz, Ismael Nilo Lino de; Universidade Federal do Ceará; Benevides, Norma Maria Barros; Universidade Federal do Ceará.
O Brasil abriga uma das maiores biodiversidades marinhas do mundo, favorecendo a descoberta de fontes alternativas de compostos farmacológicos. Desta forma, objetivou-se avaliar o potencial anticoagulante de glicosaminoglicanos (GAGs) isolados das peles da palombeta (Chloroscombrus chrysurus) e guaiúba (Ocyurus chrysurus). Os GAGs foram extraídos com papaína bruta em tampão acetato de sódio 0,1 M (pH 5,0) contendo cisteína 5 mM e EDTA 5 mM, seguido por cromatografia de troca iônica do extrato total em coluna de DEAE-celulose. As frações obtidas foram analisadas quanto à composição química (proteínas contaminantes e carboidratos totais) e os GAGs identificados por eletroforese em gel de agarose a 0,5%. Os ensaios de atividade anticoagulante foram realizados...
Tipo: Bioprospecção ; composição bioquímica ; relações biológicas
Palavras-chave: 2.08.01.00-9 teleósteos marinhos; Glicosaminoglicanos sulfatados; Coagulação sanguínea; Teste do TTPA Química de macromoléculas marine teleosts; Sulfated glycosaminoglycans; Blood coagulation; APTT test.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/6056

Analysis of two precipitation methods on the yield, structural features and activity of sulfated polysaccharides from Gracilaria cornea (Rhodophyta)
Provedor de dados: 3
Autores: Souza, Ricardo Basto; Queiroz, Ismael Nilo Lino de; Silva Neto, Antônio Alves da; Carneiro, José Gerardo; Rodrigues, José Ariévilo Gurgel; Benevides, Norma Maria Barros.
The global demand for natural products from seaweeds has increased worldwide; however, no description of the use of isoamly alcohol (IAA) for obtaining of sulfated polysaccharides (SPs) has been reported. We investigated the efficiency of two precipitation methods (M) in obtaining SPs from the red seaweed Gracilaria cornea. SPs enzymatically isolated were concentrated with cetylpyridinium chloride (M I) or IAA (M II) and extracts were examined with regard to their yield, structural features and in vitro effects on the activated partial thromboplastin time (APTT) using normal human plasma and standard heparin (193 IU mg-1). Yield difference reached 12.99%. Quantitative determination of sulfate was similar between the two methods (̴ 26%), but extracts...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rhodophyceae; Polysulfated; Precipitation methods; Structural analysis; APTT test.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/24016

Anticoagulant activity of a sulfated polysaccharide isolated from the green seaweed Caulerpa cupressoides
Provedor de dados: 52
Autores: Rodrigues,José Ariévilo Gurgel; Vanderlei,Edfranck de Sousa Oliveira; Bessa,Érika Façanha; Magalhães,Francisco de Araújo; Paula,Regina Célia Monteiro de; Lima,Vilma; Benevides,Norma Maria Barros.
The aim of this study was to evaluate certain molecular characteristics of a sulfated polysaccharide (SPs) with anticoagulant properties, isolated from Caulerpa cupressoides (Chlorophyta). Crude SPs were extracted by proteolytic digestion (papain), followed by ion-exchange chromatography on a DEAE-cellulose column. The fractions obtained were analyzed for molecular mass, 0.5% agarose gel electrophoresis and chemical composition. The activated partial thromboplastin time (APTT) test was applied using normal human plasma and standard heparin (HEP) (193 IU mg-1). The yield was ~ 3%, and the chromatography procedure separated the material into three different SP fractions (F I, F II and F III), eluted at the concentrations of 0.50, 0.75 and 1.00 M of NaCl,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Marine algae; Sulfated macromolecules; Chemical analysis; APTT test.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400007