[关键词]
[摘要]
目的 以白及多糖(BSP)为成膜材料,制备黄藤素(PA)纳米柔性脂质体(PFL)膜剂,并评价其药剂学相关性能,为其进一步应用奠定基础。方法 采用注入法制备黄藤素纳米柔性脂质体,匀浆涂布法制备黄藤素纳米柔性脂质体白及多糖膜剂(PFL-BPF);采用电子显微镜、差示扫描量热仪(DSC)和体外透黏膜实验等对PFL-BPF进行表征和评价。结果 以BSP为成膜材料时,PFL与BSP的相容性良好且易于成膜;所得PFL-BPF的外观平滑、无气泡、柔韧性与挺度适宜;PFL-BPF具有良好的生物黏附性,黏附于黏膜后耐生理盐水冲刷时间为(130±7) min。PFL-BPF在0.5 h时,促进PA渗入黏膜的剂量为32.41 μg/g,分别为黄藤素水溶液白及多糖膜剂(PL-BPF)、空白柔性脂质体+黄藤素白及多糖膜剂(BLP+PA-BPF)的3.17倍和1.9倍(t检验,P<0.05);2.5 h,分别为PL-BPF、BLP+PA-BPF的2.67倍和1.89倍。表明其能够显著促进水溶性药物PA透过黏膜且缓释作用强;DSC显示其促进药物透黏膜吸收的可能机制为柔性脂质体扰乱黏膜上皮细胞紧密排列而携带药物进入黏膜组织。结论 PFL-BPF成膜性好、黏附作用持久、耐冲刷能力强,且制备工艺简单可行,能够显著地促进药物透过黏膜,因此,纳米柔性脂质体膜剂是一种良好的透黏膜给药载体,具有广阔的应用前景。
[Key word]
[Abstract]
Objective To prepare palmatine-loaded flexible nano-liposomes (PFL) films with Bletilla striata polysaccharide (BSP) as membrane material, and evaluate its pharmacy related performance in order to lay the foundation for further application.Methods The PFL was prepared by injection method and the films of PFL based on Bletilla striata polysaccharide (PFL-BPF) was prepared by homogenate coating method. The PFL-BPF was characterized and evaluated by electron microscopy, differential scanning calorimeter (DSC), and in vitro transmucosal membrane experiment.Results The PFL and BSP had good compatibility and easy to film with BSP as membrane material. The appearance of PFL-BPF obtained was smooth, non-bubble, flexible, and suitable stiffness; PFL-BPF had good biological adhesion. The time of scouring the film agent from mucous membrane with normal saline was (130 ±7) min. At 0.5 h, the dose of PFL-BPF promoting palmatine (PA) infiltration to mucosa was 32.41 μg/g. It was 3.17 times higher than those of PA solution based on BSP (PL-BPF) and 1.9 times for PA common liposomes based on BSP (BLP + PA-BPF) (t-test, P < 0.05); At 2.5 h, it was 2.67 times and 1.89 times higher than those of PL-BPF and BLP + PA-BPF, respectively. It showed that PFL-BPF could significantly promote the water-soluble drug PA through mucosa membrane and release it slowly. The results of DSC showed that the possible mechanism for promoting the absorption of PA through mucosa membrane was that the flexible liposomes disturbed the mucosal epithelial cells and carried the drug into the mucosal tissue.Conclusion The PFL-BPF had the advantages of good film-forming property, lasting adhesive attraction, strong scour resistance, simple and feasible preparation process, and could promote drug permeation into mucosa obviously. Therefore, the flexible nano-liposomes film is a good drug carrier for the transmucosal drug delivery applications and has a wide application prospect.
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[基金项目]
国家自然科学基金资助项目(81303231);陕西省自然科学面上项目(2017JM8109);西安医学院药学省级重点学科建设项目(2016YXXK01;2016YXXK07)