Page 24 - 《中国药房》2023年1期
P. 24

白头翁皂苷B4和PD-L1 siRNA共递送cRGD修饰靶向脂质体的

          制备及体外细胞摄取研究
                                                  Δ

          万安平 ,张 婧 ,周 雄 ,冯育林 ,刘 骏 ,何 瑶 ,李 翔 (1.江西中医药大学中药固体制剂制造技术
                                           1
                                                   1
                 1*
                                                            1, 2
                                                                     1 #
                                   1
                           2
          国家工程研究中心,南昌 330006;2.江西中医药大学现代中药制剂教育部重点实验室,南昌 330004)
          中图分类号  R943      文献标志码  A      文章编号  1001-0408(2023)01-0018-05
          DOI  10.6039/j.issn.1001-0408.2023.01.04
          摘   要  目的  制备白头翁皂苷 B4(AB4)和程序性死亡配体 1(PD-L1)小干扰 RNA(siP)共递送环精氨酰甘氨酸天冬氨酸序列
         (cRGD)修饰靶向脂质体(AB4/siP-c-L),并考察其体外细胞摄取行为。方法  采用乙醇注入法制备cRGD修饰的AB4靶向脂质体
         (AB4-c-L),将AB4-c-L与20 nmol/L的siP 等体积混合,通过静电吸附得到AB4/siP-c-L。分别采用激光散射粒径测定仪、透射电
          子显微镜、超滤离心法、透析法、琼脂糖凝胶电泳法考察AB4/siP-c-L的粒径、Zeta 电位、形态、包封率、药物含量、体外释放行为、血
          清稳定性。分别采用流式细胞术和共聚焦激光扫描技术评价小鼠Lewis肺癌细胞LLC对AB4/siP-c-L的摄取及其在细胞内的分
          布情况。结果  AB4/siP-c-L的平均粒径为(187.4±3.1) nm,Zeta电位为(33.5±1.4) mV,形态呈类球形,AB4的包封率和含量分别为
         (95.2±0.4)%、(1.0±0.2) mg/mL;AB4/siP-c-L可较好地包裹siP,并具有较好的血清稳定性、pH敏感性以及缓释特性。LLC细胞对
          AB4/siP-c-L的摄取率显著高于游离药物,并能实现细胞质内富集。结论  AB4/siP-c-L可有效实现AB4与基因药物siP共载,且对
          LLC细胞具有一定的体外靶向性。
          关键词  白头翁皂苷B4;程序性死亡配体1;小干扰RNA;脂质体;细胞摄取

          Preparation  and  cellular  uptake  study  of  anemoside  B4  and  PD-L1  siRNA  co-delivered  cRGD-modified
          targeting liposomes
                                                                           1
                                                                                     1, 2
                                                                 1
                                                                                                 1
          WAN Anping ,ZHANG Jing ,ZHOU Xiong ,FENG Yulin ,LIU Jun ,HE Yao ,LI Xiang (1.  National
                                     2
                                                    1
                      1
          Pharmaceutical  Engineering  Center  for  Solid  Preparation  in  Chinese  Herbal  Medicine,  Jiangxi  University  of
          Chinese  Medicine,  Nanchang  330006,  China;2.  Key  Laboratory  of  Modern  Preparation  of TCM  of  Ministry  of
          Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China)
          ABSTRACT    OBJECTIVE  To  prepare  anemoside  B4 (AB4)  and  programmed  cell  death  ligand  1 (PDL1)  siRNA (siP)  co-
          delivered  cRGD-modified  targeting  liposomes (AB4/siP-c-L),  and  to  study  the  cellular  uptake  in  vitro.  METHODS  The  cRGD-
          modified AB4-loaded targeted liposomes (AB4-c-L) were prepared by ethanol injection. AB4-c-L was mixed with 20 nmol/L siP in
          the  same  volume  and  AB4/siP-c-L  was  obtained  through  electrostatic  adsorption.  The  particle  size,  Zeta  potential,  morphology,
          encapsulation  efficiency  and  drug  content,  in  vitro  release  behavior  and  serum  stability  of AB4/siP-c-L  were  investigated  by  laser
          scattering  particle  size  tester,  transmission  electron  microscopy,  ultrafiltration  centrifugation,  dialysis  and  agar-gel  electrophoresis
          block test. Cellular uptake of AB4/siP-c-L by Lewis lung cancer cells LLC and its intracellular localization were evaluated by flow
          cytometry  and  confocal  laser  scan  technique.  RESULTS  The  average  particle  size  of AB4/siP-c-L  was (187.4±3.1)  nm,  and  the
          Zeta  potential  was (33.5±1.4)  mV. AB4/siP-c-L  was  spheroidal  in  shape.  The  encapsulation  efficiency  and  content  of AB4  were
         (95.2±0.4)  %  and (1.0±0.2)  mg/mL,  respectively.  AB4/siP-c-L  could  better  package  siP,  and  exhibited  good  serum  stability,
          obvious  pH  sensitivity  and  sustained  release  property.  The  uptake  rate  of AB4/siP-c-L  by  LLC  cells  was  significantly  higher  than
          that of free drug, and was able to accumulate in cytoplasm. CONCLUSIONS AB4/siP-c-L can effectively realize the co-loading of
          AB4 and gene drug siP, which has certain in vitro targeting to LLC cells.
          KEYWORDS     anemoside B4; PD-L1; siRNA; liposome; cellular uptake



              Δ 基金项目 国家自然科学基金资助项目(No.82260695);江西省                白头翁始载于《神农本草经》,为毛茛科植物白头翁
                                                                                                    [1]
          自然科学基金项目(No.20212ACB206004);江西中医药大学科技创新             Pulsatilla chinensis (Bunge) Regel 的干燥根 。白头翁
          团队(No.CXTD22001);江西省青年井冈学者项目(No.QNJG2018077);       皂苷 B4(anemoside B4,AB4)是白头翁中的五环三萜皂
          大学生创新创业训练计划项目(No.双创院发〔2022〕2号)                                                              [2]
                                                              苷成分之一,具有抗肿瘤、调节免疫等药理作用 。然而
             * 第一作者 硕 士 研 究 生 。 研 究 方 向 :中 药 学 。 E-mail:
          2824511606@qq.cm                                    AB4为水溶性药物,在血浆中的半衰期短、代谢快,在肿
                                                                                                           [3]
                                                              瘤部位的富集量较少,这在一定程度上限制了其应用 。
              # 通信作者 教授,硕士生导师,博士。研究方向:药物新剂型与新
          技术。E-mail:sterlinghawk@163.com                      程序性死亡配体1(programmed cell death ligand 1,PD-L1)

          · 18 ·    China Pharmacy  2023 Vol. 34  No. 1                                中国药房  2023年第34卷第1期
   19   20   21   22   23   24   25   26   27   28   29