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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Preparation, characterization and anticoagulant activity in vitro of heparin-like 6-carboxylchitin derivative
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Preparation, characterization and anticoagulant activity in vitro of heparin-like 6-carboxylchitin derivative

机译:肝素样6-羧基甲壳素衍生物的制备,表征及体外抗凝活性

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摘要

A series of heparin-like 6-carboxylchitin derivatives with different N-acetyl group and sulfate group contents were prepared. Their structures were characterized by element analysis, FT-IR, ~(13)C NMR, and gel permeation chromatography. Their anticoagulant activity in vitro was investigated for human plasma with respect to activated partial thromboplastin time (APTT). The results showed all 6-carboxylchitin derivatives prolonged APTT within the scope of studied degree of sulfation (0.28-1.03) and Mws (4.3-13.7kDa). Their anticoagulant activity strongly depended on their structures. 3,6-O-sulfated group promoted the anticoagulant activity. Only incorporation of N-sulfated group into deacetylated 6-carboxylchitin could not improve the anticoagulant activity. But, N-sulfated group and O-sulfated group had the synergistic action, and N-sulfated group could promote the anticoagulant activity for the N,O-sulfated chitin derivatives. In addition, acetyl group took a role in the anticoagulant activity, too.
机译:制备了一系列具有不同N-乙酰基和硫酸根含量的类肝素样6-羧基甲壳素衍生物。通过元素分析,FT-IR,〜(13)C NMR和凝胶渗透色谱对它们的结构进行表征。就活化血浆部分凝血活酶时间(APTT)而言,研究了它们在体外对人血浆的抗凝活性。结果表明,在研究的硫酸化度(0.28-1.03)和Mws(4.3-13.7kDa)的范围内,所有6-羧基甲壳素衍生物均能延长APTT。它们的抗凝活性很大程度上取决于其结构。 3,6-O-硫酸根基团具有抗凝活性。仅将N-硫酸基团掺入脱乙酰基6-羧基壳多糖中不能改善抗凝活性。但是,N-硫酸化基团和O-硫酸化基团具有协同作用,N-硫酸化基团可以促进N,O-硫酸化几丁质衍生物的抗凝活性。另外,乙酰基也在抗凝活性中起作用。

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