【摘要】 利用化学氧化还原法制备了氧化石墨烯,进一步超声破碎剥离,得到纳米氧化石墨烯,并对其进行聚乙二醇(PEG)的功能化修饰后载药顺铂。采用扫描电子显微镜(SEM)、紫外-可见吸收光谱(UV-Vis)、傅立叶变换红外光谱(FTIR)对石墨烯纳米载药体系进行表征,细胞存活率实验(MTT)法检验石墨烯纳米载药体系对人口腔鳞癌(KB)细胞的杀伤作用。结果表明,石墨烯纳米载药体系对顺铂的负载率为42. 4%,聚乙二醇修饰后可以降低纳米氧化石墨烯的细胞毒性并提高生物相容性,对KB细胞具有双重的杀伤作用,为纳米氧化石墨烯在肿瘤治疗的临床应用提供了理论依据。更多还原

【Abstract】 Graphene oxide was synthesized by chemical redox method. The graphene oxide nanoparticles were prepared by ultrasonic fragmentation and peeling,and functionalized by polyethylene glycol(PEG). The modified graphene oxide was loaded with cisplatin. The graphene nano-drug delivery system was characterized by scanning electron microscopy(SEM),ultraviolet-visible absorption spectroscopy(UV-Vis) and Fourier transform infrared spectroscopy(FTIR). The killing effect of graphene nano-drug delivery system on oral squamous cell carcinoma human oral squamous cell carcinoma(KB) cells was examined by cell survival rate experiment(MTT) method. The results demonstrate that the loading rate of graphene nano-drug-loading system is 42. 4%. Polyethylene glycol modified nano graphene oxide can reduce the cytotoxicity of nano graphene oxide and improve its biocompatibility. It has dual killing effect on KB cells,which provides a theoretical basis for the clinical application of nano graphene oxide in cancer treatment.更多还原