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聚乳酸-羟基乙酸共聚物载肝细胞生长因子纳米粒的构建及生物学活性评价

摘要:目的:探究制备聚乳酸-羟基乙酸共聚物(PLGA)纳米粒的优化条件,构建肝细胞生长因子(HGF)纳米粒,评价其包封率、载药量、回收率、释放度和生物学活性。方法采用复乳溶剂挥发法制备牛血清白蛋白(BSA)PLGA纳米粒,通过正交试验设计,以粒径较小,包封率、载药量和回收率较高为考察指标,优化纳米粒的制备条件;选取优化条件制备HGF纳米粒,分别采用BCA试剂盒和HGF-ELISA试剂盒检测BSA纳米粒和HGF纳米粒的包封率、载药量和释放度,通过CCK8增殖实验评价HGF纳米粒的生物活性。结果优化条件下制备的HGF 纳米粒大小均匀,粒径234.4±4.8 nm,包封率(77.75±3.04)%,回收率(49.33±9.34)%,体外释放度曲线表现为先突释,后缓释;HGF纳米粒可以促进角质形成细胞的增殖。结论复乳溶剂挥发法-优化条件下制备的HGF纳米粒具有较高包封率,良好的缓释效果和生物学活性。

英文摘要:Objective To explore the optimum conditions for preparing poly(lactic-co-glycolic) acid (PLGA) nanoparticles and evaluate the bioactivity of hepatocyte growth factor (HGF)-loaded PLGA nanoparticles. Methods Bovine serum albumin (BSA)-loaded PLGA nanoparticles were prepared using a double emulsion-solvent evaporation method. The preparation process of nanoparticles was optimized by orthogonal test with the particle size, encapsulation efficiency (EE), drug loading (DD), and recovery as the indexes. HGF-loaded nanoparticles were then prepared under the optimized conditions. The EE, DD and release characteristics of BSA-loaded nanoparticles and HGF-loaded nanoparticles were evaluated using a BCA kit and HGF ELISA kit. The bioactivity of HGF-loaded nanoparticles was evaluated using CCK8 proliferation assay. Results The HGF-loaded nanoparticles prepared under the optimized conditions had a uniform size with a mean diameter of 234.4�.8 nm, an EE of (77.75�.04)% and a recovery rate of (49.33�.34)%. The in vitro release curve highlighted an initial burst drug release followed by sustained release from the nanoparticles. HGF-loaded nanoparticles obviously promoted the proliferation of Hacat keratinocytes in vitro. Conclusion HGF-loaded nanoparticles prepared using double emulsion-solvent evaporation method under optimized conditions possesses a high EE with a good sustained drug release profile and a good bioactivity.

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[V1] 2018-06-15 21:41:27 chinaXiv:201806.00139V1 下载全文
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