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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 ·
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