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·药学研究·
黄芩苷-甘草酸纳米晶的制备工艺优化及体外释放考察
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谢 龙 1, 2* ,赵雨芯 ,刘 凯 ,古 环 ,李小芳 (1.成都中医药大学西南特色中药资源国家重点实验室,
成都 611137;2.成都中医药大学药学院,成都 611137)
中图分类号 R943 文献标志码 A 文章编号 1001-0408(2023)23-2829-06
DOI 10.6039/j.issn.1001-0408.2023.23.03
摘 要 目的 优化黄芩苷(BCN)-甘草酸(GA)纳米晶(BCN-GA-SN)的制备工艺,并进行表征和体外释放考察。方法 根据经典
药对“黄芩-甘草”配伍比例,固定BCN和GA的配伍比例为6∶1(m/m),采用沉淀法结合高压均质法制备BCN-GA纳米混悬液。以
平均粒径、多分散性指数(PDI)为评价指标,以稳定剂的种类及用量、搅拌转速和时间、高压均质压力和次数为考察因素,优化
BCN-GA 纳米混悬液制备工艺;再以平均粒径、PDI、再分散系数(RDI)为评价指标,以冻干保护剂种类和用量为考察因素,优化
BCN-GA纳米混悬液的冻干固化工艺,进而制备BCN-GA-SN;然后对BCN-GA-SN的理化性质表征和体外释放进行考察。结果
BCN-GA-SN的最优制备工艺为:先以15%十二烷基硫酸钠为稳定剂,1 000 r/min搅拌15 min,100 MPa高压均质20次制备BCN-
GA 纳米混悬液;再以 5% 甘露醇(相对于 BCN 的用量)冻干固化。所制得的 BCN-GA-SN 的平均粒径为(442.2±5.7) nm,PDI 为
0.225±0.015,RDI 为 1.055±0.013,呈不规则球形,大小较为均匀;该纳米晶中 BCN 的载药量为(62.5±0.7)%,GA 的载药量为
(9.4±0.2)%;体外释放结果表明,BCN-GA-SN的累积溶出度均高于BCN、GA的物理混合物。结论 本研究成功制备了BCN-GA-
SN,其粒径大小均一、分布均匀,可有效提高BCN的体外溶出度。
关键词 黄芩-甘草药对;黄芩苷;甘草酸;纳米晶;体外释放
Optimization of preparation technology and in vitro release of baicalin-glycyrrhizic acid solid nanocrystals
XIE Long ,ZHAO Yuxin ,LIU Kai ,GU Huan ,LI Xiaofang (1. State Key Laboratory of Southwestern
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Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China;
2. School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China)
ABSTRACT OBJECTIVE To optimize the preparation technology of baicalin (BCN)-glycyrrhizic acid (GA) solid nanocrystals
(BCN-GA-SN), to characterize them and investigate their in vitro release characteristics. METHODS According to the
compatibility ratio of classic couplet medicinals “Scutellaria baicalensis-Glycyrrhiza uralensis”, the compatibility ratio of BCN and
GA was determined as 6∶1 (m/m); BCN-GA nanosuspension was prepared by precipitation method combined with high-pressure
homogenization method. The preparation technology of BCN-GA nanosuspension was optimized by using mean particle size and
polydispersity index (PDI) as indexes and with types and dosage of stabilizers, stirring speed and time, high-pressure
homogenization pressure and frequency as factors. The freeze-dried consolidation process of BCN-GA nanosuspension was
optimized to prepare BCN-GA-SN using average particle size, PDI and redispersibility index (RDI) as indicators, with the type
and dosage of freeze-dried protective agents as factors; then, the physicochemical properties and in vitro release of BCN-GA-SN
were investigated. RESULTS The optimal preparation technology of BCN-GA-SN was as follows: BCN-GA nanosuspension was
prepared by using 15% sodium dodecyl sulfate as a stabilizer, stirring at 1 000 r/min for 15 minutes, and homogenizing at 100
MPa for 20 times; then, BCN-GA nanosuspension was freeze-dried and solidified with 5% mannitol (corresponding to the dosage
of BCN). The average particle size of prepared BCN-GA-SN was (442.2±5.7) nm with PDI of 0.225±0.015 and RDI of 1.055±
0.013. The prepared BCN-GA-SN presented as the irregularly spherical shape with more uniform size; the drug-loading amount of
BCN in the nanocrystal was (62.5±0.7)% , and that of GA
Δ 基金项目 国 家 自 然 科 学 基 金 青 年 科 学 基 金 项 目(No. was (9.4±0.2)%; the in vitro release results showed that the
8220142100);四川省科技计划项目(No.2019YFS0113);成都市重点
cumulative dissolution of BCN-GA-SN was higher than that of
研发支撑项目(No.2022-YF05-02161-SN) the physical mixture of BCN and GA. CONCLUSIONS BCN-
*第一作者 博士研究生。研究方向:中药新制剂、新剂型、新技
GA-SN is prepared successfully in this study with uniform
术。E-mail:xielong@stu.cdutcm.edu.cn
# 通信作者 教授,博士生导师。研究方向:中药新制剂、新剂型、 particle size and even distribution, which can effectively
新技术。E-mail:lixiaofang@cdutcm.edu.cn improve the dissolution of BCN.
中国药房 2023年第34卷第23期 China Pharmacy 2023 Vol. 34 No. 23 · 2829 ·