Department of Pharmaceutical Botanics, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey.
Int J Nanomedicine. 2011;6:477-84. doi: 10.2147/IJN.S16803. Epub 2011 Feb 28.
Magnetic nanoparticles show great promise for use as tools in a wide variety of biomedical applications. The purpose of this study was to investigate the potential effects of methacrylamido-folic acid (Ma-Fol)-modified magnetic nanoparticles on 5RP7 (H-ras-transformed rat embryonic fibroblasts) and NIH/3T3 (normal mouse embryonic fibroblasts).
The cytotoxicity and viability of 5RP7 and NIH/3T3 cells were detected. The percentage of cells undergoing apoptosis was analyzed by flow cytometry using Annexin V-fluorescein isothiocyanate staining. Nanoparticle internalization into 5RP7 and NIH/3T3 cells was visualized by transmission electron microscopy.
In this study, folic acid coupled to the surface of iron oxide for selective binding to cancer cells and immobilized the surfaces of magnetic nanoparticles. This complex improves cell internalization and targeting of cancer cells. We detected increased apoptosis using flow cytometry and transmission electron microscopy.
Folic acid modification of magnetic nanoparticles could be used to facilitate uptake to specific cancer cells for cancer therapy and diagnosis. Our results showed that the uptake of folic-acid modified nanoparticles by 5RP7 cancer cells was also much higher than that of 3T3 cells. This modification can be used for successful targeting of cancer cells expressing the folate receptor.
磁性纳米粒子在各种生物医学应用中作为工具具有很大的应用潜力。本研究旨在探讨甲丙烯酰胺叶酸(Ma-Fol)修饰的磁性纳米粒子对 5RP7(H-ras 转化的大鼠胚胎成纤维细胞)和 NIH/3T3(正常小鼠胚胎成纤维细胞)的潜在影响。
检测 5RP7 和 NIH/3T3 细胞的细胞毒性和活力。用 Annexin V-异硫氰酸荧光素染色通过流式细胞术分析细胞凋亡的百分比。用透射电子显微镜观察纳米粒子进入 5RP7 和 NIH/3T3 细胞的情况。
在这项研究中,叶酸与氧化铁表面偶联以选择性结合癌细胞,并固定磁性纳米粒子的表面。这种复合物提高了癌细胞的内化和靶向能力。我们通过流式细胞术和透射电子显微镜检测到细胞凋亡增加。
磁性纳米粒子的叶酸修饰可用于促进特定癌细胞的摄取,以用于癌症治疗和诊断。我们的结果表明,叶酸修饰的纳米粒子被 5RP7 癌细胞摄取的量也远高于 3T3 细胞。这种修饰可用于成功靶向表达叶酸受体的癌细胞。