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微型化介质研磨法制备槲皮素纳米混悬剂

2017-08-30刘肖刘娟庞建云申宝德沈成英连王权李小芳袁海龙

中国中药杂志 2017年15期

刘肖 刘娟 庞建云 申宝德 沈成英 连王权 李小芳 袁海龙

[摘要]采用BoxBehnken设计效应面法优化一种微型化介质研磨法制备槲皮素纳米混悬剂(QTNS)的工艺参数并評价所制得的QTNS的体外累积释放度。结果显示,以最优工艺参数:氧化锆珠子45 mL、研磨速度690 r·min-1、研磨时间15 h,制得的QTNS的粒径为(169±5) nm,多分散度指数为0204±0006,稳定系数为0827±0014,且理论预测值与实测值偏差较小,模型具有良好的预测性;在120 min体外累积释放度实验中,QTNS明显高于原料药和物理混合物。使用该种微型化介质研磨法能成功制备QTNS,且该方法中原料药消耗少,工艺简单、操作方便,可为纳米制剂的制备提供新的参考。

[关键词]槲皮素; 纳米混悬剂; 微型化介质研磨法; 体外释放

Preparation of nanosuspension of quercetin with a miniaturized milling method

LIU Xiao1, 2, LIU Juan1, PANG Jianyun1, SHEN Baode2, SHEN Chengying2,

LIAN Wangquan2, LI Xiaofang1*, YUAN Hailong2*

(1 College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China;

2 Department of pharmacy, Air Force General Hospital, PLA, Beijing 100142, China)

[Abstract]The nanosuspension of quercetin (QTNS) was prepared by a miniaturized milling method, and the process was optimized by BoxBehnken response surface method Then the accumulative release rate of QTNS in vitro was determined The results showed that the optimal process parameters were as follows: ZrO2 45 mL, milling speed 690 r·min-1 and milling time 15 h; the particle size of QTNS was (169±5) nm, polydispersity index of 0204±0006 and stability index of 0827±0014, respectively There was a little deviation between the theoretically predicted value and the measured value, indicating that this model had a good prediction effect The accumulative release rate in vitro of QTNS in 120 min was significantly higher than that of the raw drug and physical mixture This simple lowcost miniaturization approach could prepare QTNS successfully, and could provide reference for the formulation of the nanosuspension.

[Key words]quercetin; nanosuspension; miniaturized milling method; in vitro release

槲皮素(quercetin,QT)为一种天然黄酮类化合物,具有抗氧化、抗癌、抗高血压、抗抑郁、镇静催眠等作用。但由于槲皮素亲水性差、吸收差、口服生物利用度低,限制了其临床应用[13]。

纳米混悬剂(nanosuspension,NS)是采用少量表面活性剂作为稳定剂的“纯药物”粒子所构成的一种亚微米胶体分散体系[4]。NS中药物以纳米状态存在,高度分散,利于药物的溶出和吸收,能显著提高药物的生物利用度。目前制备NS主要方法有“top down”和“bottom up”两类[5],其中,介质研磨法作为常用“top down”技术已经实现了产品的上市。然而,现有的介质研磨法需要专门的研磨机,且一次制备所需原料药较多,处方及工艺筛选过程资源消耗较大,不适用于贵重原料药及新分离的活性化合物(分离量一般较少)的制备。

本研究参考文献方法[6],设计一种微型化介质研磨技术,以磁力搅拌器为动力装置,西林瓶为研磨室,采用氧化锆珠子为研磨介质,制备QTNS,并对工艺进行优化。……

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