Hollow copper sulfide nanoparticle-mediated transdermal drug delivery.

Hollow copper sulfide nanoparticle-mediated transdermal drug delivery.
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空心硫化铜纳米颗粒介导的透皮药物递送。

DOI:
10.1002/smll.201200783
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发表时间:
2012-10-22
期刊:
影响因子:
13.3
通讯作者:
Lu, Wei
Lu, Wei
中科院分区:
材料科学1区
文献类型:
--
作者:
Ramadan, Samy;Guo, Liangran;Li, Yajuan;Yan, Bingfang;Lu, Wei

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在近红外(NIR)波长处具有强光学吸收的纳米颗粒可以有效地将光能转换成热能,并且在生物和生物医学应用中显示出多模态性。在这项工作中,一种新型的热消融增强的透皮给药方法的基础上,空心硫化铜纳米粒子(HCuSNPs)具有强烈的光热耦合效应。纳秒脉冲NIR激光的应用允许纳米颗粒的快速加热和瞬时热传导。这在局部区域提供了非常短的时间段但极高的温度(估计超过100°C),并对角质层进行了集中的热消融。由于来自脉冲激光器的不连续光最小化了热积累,因此照射皮肤区域的平均温度仅增加到约40-50°C。皮肤的热消融的程度,即去除角质层、有活力的表皮或真皮,可以通过调节激光功率来控制。通过HCuSNP介导的光热消融的皮肤破坏显著增加了大分子药物如人生长激素的渗透性,提供了有效和受控的经皮递送。这项技术提供了令人信服的机会,以克服小分子量和大分子量药物的低口服生物利用度,避免长期皮下注射的痛苦和不便。注射,同时实现持续和受控的递送。
Nanoparticles with strong optical absorption at near-infrared (NIR) wavelengths can efficiently convert optical energy into thermal energy, and have shown multimodality in biological and biomedical applications. In this work, a new type of thermal ablation-enhanced transdermal delivery methodology is developed based on hollow copper sulfide nanoparticles (HCuSNPs) with intense photothermal coupling effects. Application of nanosecond-pulsed NIR laser allows rapid heating of the nanoparticles and instantaneous heat conduction. This provides very short periods of time but extremely high temperatures (estimated over 100°C) in local regions, with focused thermal ablation of the stratum corneum. Because the discontinuous light from the pulsed laser minimized heat accumulation, the average temperature of the irradiated skin area only increases to ~40–50°C. The extent of thermal ablation of skin, i.e. removal of the stratum corneum, viable epidermis, or the dermis, can be controlled by adjusting the laser power. The skin disruption by HCuSNP-mediated photothermal ablation significantly increases the permeability of macromolecule drugs such as human growth hormone, providing effective and controlled percutaneous delivery. This technique offers compelling opportunities to overcome low oral bioavailability of small- and large-molecular-weight drugs, avoiding the pain and inconvenience of long-term s.c. injections while enabling sustained and controlled delivery.
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