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正交实验优选黄芪多糖硫酸化修饰条件及修饰产物抗IBDV活性测定 被引量:15

Sulfated Modification Conditions Optimization of Astragalus Polysaccharide by Orthogonal Test and anti-IBDV Activity Determination of the Modifiers
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摘要 目的:优选黄芪多糖硫酸化修饰的最佳条件,探讨硫酸化修饰提高黄芪多糖活性的可能性。方法:采用氯磺酸-吡啶法对一步醇沉的总黄芪多糖和分步醇沉并纯化的3种分级黄芪多糖进行硫酸化修饰,以氯磺酸-吡啶配比、反应温度和反应时间为因素水平,用L9(3)4正交设计对修饰条件进行优选,用硫酸钡比浊法测定修饰产物的硫酸基取代度(DS),用MTT法测定修饰产物的抗IBDV活性。结果:黄芪多糖氯磺酸-吡啶法修饰的最佳条件为氯磺酸:吡啶为1:6,反应温度95℃,反应时间1h。结论:硫酸化修饰能提高黄芪多糖的抗病毒活性,且与DS相关。 Objective: To optimize the sulfated modification conditions of astragalus polysaccharide (APS) and probe into the probability of sulfated modification to enhance APS activity. Methods : Total APS extracted by one-step ethanol precipitation and three fractional APSs extracted by stepwise ethanol precipitation method and purified were modified by chlorosulfonic acid-pyridine method. The modification conditions were optimized by L9 ( 3^4 ) orthogonal design taking the ratio of chlorosulfonic acid to pyridine, reaction temperature and time. The degree of substitution (DS) was tested by sulfate barium turbidimetric method. The anti-IBDV activity of modification production was tested by MTT method. Results : The optimized modification conditions were 1 : 6 of chlorosulfonic acid to pyridine, reaction temperature of 95℃ and reaction time of 1 hour. Conclusion:Sulfated modification can enhance the antiviral activity of APS, which related to DS.
出处 《中药材》 CAS CSCD 北大核心 2008年第4期588-592,共5页 Journal of Chinese Medicinal Materials
基金 国家自然科学基金项目(30571360)
关键词 黄芪多糖 硫酸化修饰 正交实验 抗病毒活性 Astragalus polysaccharide Sulfated modification Orthogonal test Antiviral activity
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