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Polysaccharide surface modified Fe3O4 nanoparticles for camptothecin loading and release.

机译:多糖表面修饰的Fe3O4纳米颗粒用于喜树碱的加载和释放。

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摘要

Fe(3)O(4) nanoparticles were stabilized using different functional polysaccharides, such as chitosan (CS), O-carboxymethylchitosan (OCMCS) and (N-succinyl-O-carboxymethylchitosan (NSOCMCS) to improve their bioactivity. The release profile and the in vitro cancer cell inhibition activity of camptothecin (CPT) loaded polysaccharide modified Fe(3)O(4) nanoparticles were systematically studies. The particle size and size distribution of CPT-loaded polysaccharide modified Fe(3)O(4) nanoparticles were found to be strongly dependent on polysaccharide character. Such polysaccharide character could also affect CPT adsorption efficiency, CPT release behavior and bovine serum albumin (BSA) unspecific binding capacity. After 24 h incubation of 7721 cancer cells with CPT-loaded polysaccharide modified Fe(3)O(4) nanoparticles, significant changes in cell morphology could be discernible from phase contrast microscopy. Cytotoxicity assay showed these polysaccharide modified Fe(3)O(4) nanoparticles did not exhibit noteworthy cytotoxicity against 7721, however, the in vitro inhibition rate of CPT-loaded polysaccharide modified Fe(3)O(4) nanoparticles against 7721 liver cancer cell increased significantly in comparison with that of CPT-free drug.
机译:Fe(3)O(4)纳米颗粒使用壳聚糖(CS),O-羧甲基壳聚糖(OCMCS)和(N-琥珀酰-O-羧甲基壳聚糖(NSOCMCS)等不同功能的多糖来稳定,以提高其生物活性。系统研究了喜树碱(CPT)负载的多糖修饰的Fe(3)O(4)纳米粒子的体外癌细胞抑制活性,载有CPT的多糖修饰的Fe(3)O(4)纳米粒子的粒径和大小分布被发现强烈依赖于多糖特性。这种多糖特性还可能影响CPT吸附效率,CPT释放行为和牛血清白蛋白(BSA)非特异性结合能力。7721癌细胞与CPT负载的多糖修饰的Fe(3) )O(4)纳米颗粒,可通过相差显微镜观察到细胞形态的显着变化,细胞毒性试验表明这些多糖修饰的Fe(3)O(4)纳米颗粒确实尚未显示出对7721的值得注意的细胞毒性,但是,与不含CPT的药物相比,CPT加载的多糖修饰的Fe(3)O(4)纳米粒子对7721肝癌细胞的体外抑制率显着提高。

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