大豆异黄酮-壳聚糖-海藻酸钠缓释微囊抗衰老能力的实验研究

[目的]制备大豆异黄酮-壳聚糖-海藻酸钠缓释微囊,并从药代动力学和抗衰老的动物学效应对其进行评价。[方法]采用壳聚糖-海藻酸钠包埋体系和自主研发的离心筛制粒机制备大豆异黄酮缓释微囊,以市售大豆异黄酮非缓释剂型为对照,将受试ICR小鼠分为缓释、非缓释两个实验组,以及模型、空白两个对照组。连续灌胃30天,通过Morris水迷宫检测小鼠的学习和记忆能力,并分别采血浆、脑匀浆液,测定血浆丙二醛（MDA）含量,脑匀浆液MDA含量、过氧化物歧化酶（SOD）活力,根据以上检测指标评价缓释微囊的抗衰老效应。同时,将家兔分为缓释、非缓释以及空白组。受试测试药物后于不同时间点测定其血药、尿药浓度以及微囊在动物消化系统中的状态。[结果]经壳聚糖-海藻酸钠包埋体系制备的大豆异黄酮缓释微囊在受试药物后6~12小时开始崩解并释放药物,延长了大豆异黄酮的生物半衰期,而水迷宫实验及小鼠血、脑组织的MDA、SOD水平等指标结果表明,缓释微囊可提高小鼠的学习能力以及记忆力,降低小鼠血浆以及脑组织MDA含量,增加SOD活性,充分发挥大豆异黄酮抗衰老的生物学功效,与非缓释组比较,差异有统计学意义。[结论]对比现有市场剂型,大豆异黄酮-壳聚糖-海藻酸钠缓释微囊能更好地提高动物学习能力及记忆力,降低血浆与脑中MDA含量,提高脑SOD活力,具有非常优越的缓慢释放特性,充分发挥大豆异黄酮的抗衰老生物学效应。

Study of Anti-aging Effects of Isoflavones-Chitosan-Sodium Sustained-release Microcapsules

[Objective]Prepare soybean isoflavones-chitosan-sodium sustained-release microcapsules and evaluate its characteristics both from pharmacokinetics and zoology effect of aging.[Method]The soybean isoflavones microcapsules were prepared by using chitosan-sodium alginate encapsulation system,then compared with commercially available formulations;ICR mice were randomly divided into four groups(sustained-release/unsustained-release/model/blank groups).Continually feed each group with different formulations for 3...