NIR-Activated Polydopamine-Coated Carrier-Free "Nanobomb" for In Situ On-Demand Drug Release.

NIR-Activated Polydopamine-Coated Carrier-Free "Nanobomb" for In Situ On-Demand Drug Release.
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近红外激活聚多巴胺涂层无载体“纳米炸弹”用于原位按需药物释放

DOI:
10.1002/advs.201800155
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发表时间:
2018-07
期刊:
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
影响因子:
--
通讯作者:
Liu W
Liu W
中科院分区:
其他
文献类型:
--
作者:
Li M;Sun X;Zhang N;Wang W;Yang Y;Jia H;Liu W

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具有高载药量的无载体纳米颗粒引起了越来越多的关注;然而,原位按需药物释放仍然是一个挑战。在这里,一种新的近红外(NIR)激光诱导爆破无载体纳米药物传递系统的设计和制造,通过涂覆阿霉素(DOX)纳米粒子(DNP)与聚多巴胺膜(PDA),将延长DNP的血液循环时间,并避免血液循环过程中的DOX的预泄漏。同时,NH 4 HCO 3被引入以触发DOX的原位“炸弹样”释放,用于通过PDA的近红外辐射光热效应驱动产生二氧化碳(CO2)和氨(NH3)气体。体外和体内研究表明,具有高载药效率(85.8%)的无载体纳米载体延长了肿瘤蓄积,增强了化疗,实现了化疗和光热治疗的协同治疗,并且在三周的植入过程中不会引起任何异物反应。因此,这种精巧的设计开辟了一条自组装路径,以开发用于肿瘤治疗的基于PDA的NIR响应性多功能无载体纳米颗粒。
Carrier‐free nanoparticles with high drug loading have attracted increasing attention; however, in situ on‐demand drug release remains a challenge. Here, a novel near‐infrared (NIR) laser‐induced blasting carrier‐free nanodrug delivery system is designed and fabricated by coating doxorubicin (DOX) nanoparticles (DNPs) with a polydopamine film (PDA) that would prolong the blood circulation time of DNPs and avoid the preleakage of the DOX during blood circulation. Meanwhile, the NH4HCO3 is introduced to trigger in situ “bomb‐like” release of DOX for the production of carbon dioxide (CO2) and ammonia (NH3) gases driven by NIR irradiated photothermal effect of PDA. Both in vitro and in vivo studies demonstrate that the carrier‐free nanovectors with high drug loading efficiency (85.8%) prolong tumor accumulation, enhance chemotherapy, achieve the synergistic treatment of chemotherapy and photothermal treatment, and do not induce any foreign‐body reaction over a three‐week implantation. Hence, the delicate design opens a self‐assembly path to develop PDA‐based NIR‐responsive multifunctional carrier‐free nanoparticles for tumor therapy.
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