Fucus evanescens fucoidan的酶和化学去聚合:对结构和静血活性的影响
Artem S Silchenko1, Ilya V Taran1, Anastasia O Zueva1
1Laboratory of Enzyme Chemistry, G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159 100-Let Vladivostoku Ave., 690022, Vladivostok, Russian Federation.
International journal of biological macromolecules
|December 21, 2025
概括
富可伊丹衍生物是使用酶和化学方法制造的,以提高其安全性和有效性. 该研究发现,特定的硫化模式和分子量,而不是总硫酸盐含量,决定了抗凝固剂和抗血小板活性.
科学领域:
- 海洋生物技术 海洋生物技术
- 生物化学 生物化学
- 药理学 药理学是指药理学的学科.
背景情况:
- 富科伊丹是一种硫酸多糖,具有抗凝固特性.
- 高分子量 (Mw) 的福科丹会导致结构异质和血小板激活,限制了它们的使用.
- 低MW的富可伊丹衍生物可以减轻这些问题,但可能会降低抗凝剂效力.
研究的目的:
- 为了比较从Fucus evanescens中产生低MW的fucoidan衍生物的酶和化学脱聚合方法.
- 评估结构修饰如何影响这些衍生物的抗凝剂和血小板调节活性.
- 建立结构-活动关系,以设计改进的基于富可伊丹的治疗方法.
主要方法:
- 用四种GH107内分酶,轻度酸解和过氧化处理来制造富可伊丹衍生物.
- 结构性表征涉及尺寸排除色谱 (SEC),核磁共振 (NMR) 光谱和基于酶的新硫化模式测绘试验.
- 使用凝血试验,凝血因子抑制,血小板聚合和全血凝块稳定性测量来评估静血性质.
主要成果:
- 酶去聚合产生了定义的低和中等Mw衍生物,产量更高,结构依赖活性.
- 短时间的化学处理 (酸水解1小时,过氧化物12小时) 产生了低Mw衍生物,抗凝活性损失最小.
- 抗凝剂的有效性取决于硫化模式 (2,4-二硫化) 和Mw值 (6-10 kDa),而不是总硫酸盐含量.
- 脱聚合降低了血小板聚合 (>45%),没有激活低于10kDa,但增加的2,4-二硫化与聚合正相关.
结论:
- 分子重量和特定的硫化模式对于调节富可伊丹抗凝剂和抗血小板活性至关重要.
- 酶去聚合提供了一种可控的方法,用于生产具有量身定制的血静性质的富可伊丹衍生物.
- 这些发现为开发更安全,更有效的基于富可伊丹的疗法提供了框架,通过平衡Mw和硫化.
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