Bioproduction, purification, and application of polysialic acid

Bioproduction, purification, and application of polysialic acid
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聚唾液酸的生物生产、纯化及应用

DOI:
10.1007/s00253-018-9336-3
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发表时间:
2018-09
影响因子:
5
通讯作者:
Xia Xiaole
Xia Xiaole
中科院分区:
工程技术2区
文献类型:
--
作者:
Wu Jianrong;Zhan Xiaobei;Liu Liming;Xia Xiaole

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聚唾液酸(PSA)是一种由N-乙酰神经氨酸连接的带负电荷的线性均聚物,广泛存在于脊椎动物和一些病原体中。 PSA通常以糖蛋白和糖脂的形式存在于细胞表面,通过调节神经细胞粘附分子的粘附特性,在细胞间粘附、细胞迁移以及神经系统的形成和重塑中发挥重要作用。分子量高达 260 kDa 的 PSA 也属于引起新生儿脑膜炎的大肠杆菌 K1 的 II 族荚膜多糖。迄今为止,人们已投入大量精力开发PSA的生物技术生产。作为一种非糖胺聚糖,PSA 是一种非免疫原性且可生物降解的多糖,可用作蛋白质聚唾液酸化、组织工程和药物输送中的生物材料。 PSA还可以与其他大分子结合形成多功能复合材料。本文对PSA的生产、纯化和应用进行了总结,为PSA的进一步应用提供基础。
Polysialic acid (PSA) is a negatively charged linear homopolymer linked byN-acetylneuraminic acid and widely present in vertebrates and some pathogens. PSA, commonly found on cell surfaces as glycoproteins and glycolipids, plays important roles in intercellular adhesion, cell migration, and formation and remodeling of the neural system by regulating the adhesive property of nerve cell adhesion molecules. PSA with a molecular weight that can reach as high as 260 kDa also belongs to the group II capsule polysaccharide of neonatal meningitis-causingEscherichia coliK1. To date, much effort has been devoted to developing the biotechnological production of PSA. As a non-glycosaminoglycan, PSA is a non-immunogenic and biodegradable polysaccharide that can be used as a biomaterial in protein polysialylation, tissue engineering, and drug delivery. PSA can also combine with other macromolecules to form multifunctional composites. In this mini-review, the production, purification, and application of PSA are summarized to provide a basis for further PSA applications.
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