Spatiotemporal drug delivery using laser-generated-focused ultrasound system.

Spatiotemporal drug delivery using laser-generated-focused ultrasound system.
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DOI:
10.1016/j.jconrel.2015.08.033
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发表时间:
2015-12-28
期刊:
Journal of controlled release : official journal of the Controlled Release Society
影响因子:
--
通讯作者:
Gu Z
Gu Z
中科院分区:
其他
文献类型:
--
作者:
Di J;Kim J;Hu Q;Jiang X;Gu Z

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Laser-generated-focused ultrasound (LGFU) holds promise for the high-precision ultrasound therapy owing to its tight focal spot, broad frequency band, and stable excitation with minimal ultrasound-induced heating. We here report the development of the LGFU as a stimulus for promoted drug release from microgels integrated with drug-loaded polymeric nanoparticles. The pulsed waves of ultrasound, generated by a carbon black/polydimethylsiloxane (PDMS)-photoacoustic lens, were introduced to trigger the drug release from alginate microgels encapsulated with drug-loaded poly(lactic-co-glycolic acid) (PLGA) nanoparticles. We demonstrated the antibacterial capability of this drug delivery system against Escherichia coli by the disk diffusion method, and antitumor efficacy toward the HeLa cell-derived tumor spheroids in vitro. This novel LGFU-responsive drug delivery system provides a simple and remote approach to precisely control the release of therapeutics in a spatiotemporal manner and potentially suppress detrimental effects to the surrounding tissue, such as thermal ablation.
使用肿瘤归巢和负载紫杉醇的穿透肽功能化 PEG-PLA 纳米颗粒进行神经胶质瘤治疗
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