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Self-assembled superparamagnetic nanocomposite-labelled cells for noninvasive, controlled, targeted delivery and therapy

机译:自组装超顺磁性纳米复合标记细胞,用于无创,可控,靶向递送和治疗

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摘要

Efficient delivery of cells to targeted sites at optimal concentrations within rational limits of damage to normal tissue is a major challenge for cell delivery. With the help of magnetic nanoparticles binding to the surface of cells, it is possible to manipulate and control cell mobility using an external magnetic field. Here, we demonstrate physical entrapment of magnetic nanocomposites onto cell surfaces and their manipulation by an external magnetic field. Uniformly embedded nano iron oxide particles in a hydroxyapatite crystallite (HAIO) were synthesized via co-precipitation method. Physiochemical and biological evaluation of the above nanocomposite system showed that the HAIO containing 50 wt% iron oxide (HAIO50) possessed excellent magnetic properties and good cytocompatibility. Prussian blue staining and flow cytometric evaluation of cell-material interactions indicated uniform uptake and a dose-dependent interaction. HAIO50 is found to be a novel matrix for use as an effective and cytocompatible avenue for cell separation, evidenced via Coulter analysis as well as fluorescent imaging of live cells. Post-magnetic separation analysis of cell viability via confocal laser scanning microscopy (CLSM) showed the normal structure and proliferation of separated cells. HAIO50 may be used as an efficient matrix for magnetic non-invasive manipulation and for further cell delivery applications.
机译:在正常组织损害的合理范围内,以最佳浓度将细胞有效递送至目标部位是细胞递送的主要挑战。借助于磁性纳米粒子结合到细胞表面,可以使用外部磁场来控制和控制细胞的迁移。在这里,我们演示了磁性纳米复合物在细胞表面的物理包裹以及它们在外部磁场作用下的操纵。通过共沉淀法合成了羟基磷灰石微晶(HAIO)中均匀嵌入的纳米氧化铁颗粒。上述纳米复合材料系统的理化和生物学评估表明,含有50重量%氧化铁(HAIO50)的HAIO具有优异的磁性能和良好的细胞相容性。普鲁士蓝染色和细胞材料相互作用的流式细胞仪评估表明吸收均匀且剂量依赖性相互作用。 HAIO50被发现是一种新型的基质,可以用作细胞分离的有效且具有细胞相容性的途径,这通过库尔特分析以及活细胞的荧光成像得以证明。通过共聚焦激光扫描显微镜(CLSM)对细胞活力进行磁分离后分析表明分离细胞的正常结构和增殖。 HAIO50可用作磁性无创操作和进一步细胞递送应用的有效基质。

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