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1.江西中医药大学中药固体制剂制造技术国家工程研究中心,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
硕士研究生。研究方向:中药学。E-mail:2824511606@qq.cm
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
收稿日期:2022-05-31,
修回日期:2022-12-05,
纸质出版日期:2023-01-15
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万安平,张婧,周雄,等.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[J].中国药房,2023,34(01):18-22.
WAN Anping,ZHANG Jing,ZHOU Xiong,et al.Preparation and cellular uptake study of anemoside B4 and PD-L1 siRNA co-delivered cRGD-modified targeting liposomes[J].ZHONGGUO YAOFANG,2023,34(01):18-22.
万安平,张婧,周雄,等.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[J].中国药房,2023,34(01):18-22. DOI: 10.6039/j.issn.1001-0408.2023.01.04.
WAN Anping,ZHANG Jing,ZHOU Xiong,et al.Preparation and cellular uptake study of anemoside B4 and PD-L1 siRNA co-delivered cRGD-modified targeting liposomes[J].ZHONGGUO YAOFANG,2023,34(01):18-22. DOI: 10.6039/j.issn.1001-0408.2023.01.04.
目的
2
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
2
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
2
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
2
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。
OBJECTIVE
2
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
2
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
2
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
2
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.
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