a Département de Neurochirurgie , CHU , Angers , France.
b CRCINA, INSERM , Université de Nantes, Université d'Angers , Angers , France.
Drug Deliv. 2018 Nov;25(1):1756-1765. doi: 10.1080/10717544.2018.1507061.
Anticancer agents that target both tumor cells and angiogenesis are of potential interest for glioblastoma (GB) therapy. One such agent is sorafenib (SFN), a tyrosine kinase inhibitor. However, poor aqueous solubility and undesirable side effects limit its clinical application, including local treatment. We encapsulated SFN in lipid nanocapsules (LNCs) to overcome these drawbacks. LNCs are nanocarriers formulated according to a solvent-free process, using only components that have received regulatory approval. SFN-LNCs had a diameter of 54 ± 1 nm, high encapsulation efficiency (>90%), and a drug payload of 2.11 ± 0.03 mg/g of LNC dispersion. They inhibited in vitro angiogenesis and decreased human U87MG GB cell viability similarly to free SFN. In vivo studies showed that the intratumoral administration of SFN-LNCs or free SFN in nude mice bearing an orthotopic U87MG human GB xenograft decreased the proportion of proliferating cells in the tumor relative to control groups. SFN-LNCs were more effective than free SFN for inducing early tumor vascular normalization, characterized by increases in tumor blood flow and decreases in tumor vessel area. These results highlight the potential of LNCs as delivery systems for SFN. The vascular normalization induced by SFN-LNCs could be used to improve the efficacy of chemotherapy or radiotherapy for treating GB.
同时针对肿瘤细胞和血管生成的抗癌药物可能对胶质母细胞瘤(GB)的治疗具有潜在的意义。索拉非尼(SFN)是一种酪氨酸激酶抑制剂,就是这样一种药物。然而,较差的水溶性和不理想的副作用限制了其临床应用,包括局部治疗。我们将 SFN 封装在脂质纳米胶囊(LNC)中以克服这些缺点。LNC 是根据无溶剂工艺制备的纳米载体,仅使用已获得监管批准的成分。SFN-LNC 的直径为 54±1nm,包封效率高(>90%),LNC 分散体的载药量为 2.11±0.03mg/g。它们在体外抑制血管生成并降低人 U87MG GB 细胞活力,与游离 SFN 相似。体内研究表明,在荷有人 U87MG 原位 GB 异种移植的裸鼠中瘤内给予 SFN-LNC 或游离 SFN,与对照组相比,肿瘤中增殖细胞的比例降低。SFN-LNC 比游离 SFN 更有效地诱导早期肿瘤血管正常化,其特征为肿瘤血流量增加和肿瘤血管面积减少。这些结果突出了 LNC 作为 SFN 递送系统的潜力。SFN-LNC 诱导的血管正常化可用于提高化疗或放疗治疗 GB 的疗效。