Chemoenzymatic synthesis of homogeneous ultralow molecular weight heparins.

Chemoenzymatic synthesis of homogeneous ultralow molecular weight heparins.
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DOI:
10.1126/science.1207478
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发表时间:
2011-10-28
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Liu J
Liu J
中科院分区:
其他
文献类型:
--
作者:
Xu Y;Masuko S;Takieddin M;Xu H;Liu R;Jing J;Mousa SA;Linhardt RJ;Liu J

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超低分子量(ULMW)肝素是磺化聚糖,临床用于治疗血栓性疾病。ULMW肝素的范围从1500到3000道尔顿,对应于5到10个糖单位。商业药物Arixtra (fondaparinux钠)是一种结构均匀的ULMW肝素五糖,通过漫长的化学过程合成。在这里,我们报道了10步和12步的化学酶合成两种结构均匀的ULMW肝素(MW = 1778.5和1816.5),总收率分别为45%和37%,从一个简单的双糖开始。这些ULMW肝素在兔模型中显示出优异的体外抗凝血活性和与Arixtra相当的药代动力学特性。化学酶的方法是可扩展的,并显示出更有效的途径来合成这类重要的药物。
Ultralow molecular weight (ULMW) heparins are sulfated glycans that are clinically used to treat thrombotic disorders. ULMW heparins range from 1500 to 3000 daltons, corresponding from 5 to 10 saccharide units. The commercial drug Arixtra (fondaparinux sodium) is a structurally homogeneous ULMW heparin pentasaccharide that is synthesized through a lengthy chemical process. Here, we report 10- and 12-step chemoenzymatic syntheses of two structurally homogeneous ULMW heparins (MW = 1778.5 and 1816.5) in 45 and 37% overall yield, respectively, starting from a simple disaccharide. These ULMW heparins display excellent in vitro anticoagulant activity and comparable pharmacokinetic properties to Arixtra, as demonstrated in a rabbit model. The chemoenzymatic approach is scalable and shows promise for a more efficient route to synthesize this important class of medicinal agent.
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影响因子: 3.8
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