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Modeling of magnetoliposome uptake in human pancreatic tumor cells in vitro

机译:体外人胰腺肿瘤细胞磁罗脂素摄取的建模

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The internalization kinetics resulting from magnetic nanoparticle interactions with tumor cells play an important role in nanoparticle-based cancer treatment efficiency. Here, the uptake kinetics of magnetoliposomes (ML) into human pancreatic tumor cells (MiaPaCa-2 and BxPC-3) are quantified using magnetic particle spectrometry. A comparison to the uptake kinetics for healthy L929 cells is given. The experimental results are used for the development of an uptake kinetics model describing the three relevant internalization processes: ML adsorption to the cell membrane, endo- and exocytosis. By fitting of experimental data, the rate constant of each internalization process is determined enabling the prediction of internalized ML at any incubation time. After seven hours incubation time, MiaPaCa-2 internalized three times more ML than BxPC-3 and L929 cells even though their ML adsorption rate constants were nearly the same. As the interaction of the ML with the cell membrane is non-specific, the uptake kinetics mirror the individual cell response to ML internalization. With a new mathematical term to cover the exocytosis contribution to the overall internalization process, the extended uptake kinetics model offers new possibilities to analyze the specific internalization mechanism for other nanoparticle and cell types.
机译:磁纳米粒子与肿瘤细胞相互作用产生的内化动力学在基于纳米粒子的癌症治疗效率中起重要作用。这里,使用磁性粒子光谱法量化磁罗脂(M1)将磁罗脂(M1)的摄取动力学(MIAPACA-2和BXPC-3)定量。给出了对健康L929细胞的摄取动力学的比较。实验结果用于开发用于描述三种相关的内化方法的摄取动力学模型:Ml对细胞膜的吸附,内部和外毒性。通过拟合实验数据,确定每个内化过程的速率常数能够在任何孵育时间内预测内化mL。孵育七小时后,即使其Ml吸附速率常数几乎相同,MiaPaca-2即使它们的Ml吸附速率常数几乎相同,均匀的三倍。随着Ml与细胞膜的相互作用是非特异性的,摄取动力学反映了单个细胞对M1内化的反应。通过新的数学术语来涵盖外毒性贡献对整体内化过程的贡献,延长的摄取动力学模型提供了分析其他纳米粒子和细胞类型的特定内化机制的新可能性。

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