Tuning payload delivery in tumour cylindroids using gold nanoparticles.

Tuning payload delivery in tumour cylindroids using gold nanoparticles.
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DOI:
10.1038/nnano.2010.58
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发表时间:
2010-06
影响因子:
38.3
通讯作者:
--
中科院分区:
材料科学1区
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纳米颗粒由于其尺寸和模块化功能而具有作为可控药物递送载体的巨大潜力。当优化用于递送化学治疗剂的纳米颗粒时,时机和位置是重要参数。在这里,我们表明,携带荧光素或阿霉素分子的带正电荷和负电荷的金纳米粒子在体外三维肿瘤组织模型中移动和定位不同。荧光显微镜和数学建模表明,吸收,而不是扩散,是在颗粒交付的主导机制。我们的研究结果表明,阳性颗粒可能是更有效的药物输送,因为他们更显着采取了增殖细胞。负粒子扩散得更快,在将药物输送到组织深处时可能表现得更好。了解表面电荷如何控制组织渗透和药物释放可能会克服目前药物输送的一些限制。
Nanoparticles have great potential as controllable drug delivery vehicles because of their size and modular functionality. Timing and location are important parameters when optimizing nanoparticles for delivery of chemotherapeutics. Here we show that positively- and negatively-charged gold nanoparticles carrying either fluorescein or doxorubicin molecules move and localize differently in an in vitro three dimensional model of tumour tissue. Fluorescence microcopy and mathematical modelling showed that uptake, and not diffusion, is the dominant mechanism in particle delivery. Our results suggest that positive particles may be more effective for drug delivery because they are more significantly taken up by proliferating cells. Negative particles, which diffused faster, may perform better when delivering drugs deep into the tissues. An understanding of how surface charge can control tissue penetration and drug release may overcome some of the current limitations in drug delivery.
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