Amplifying the red-emission of upconverting nanoparticles for biocompatible clinically used prodrug-induced photodynamic therapy.

Amplifying the red-emission of upconverting nanoparticles for biocompatible clinically used prodrug-induced photodynamic therapy.
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DOI:
10.1021/nn505051d
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发表时间:
2014-10-28
期刊:
影响因子:
17.1
通讯作者:
Han, Gang
Han, Gang
中科院分区:
材料科学1区
文献类型:
--
作者:
Punjabi, Amol;Wu, Xiang;Tokatli-Apollon, Amira;El-Rifai, Mahmoud;Lee, Hyungseok;Zhang, Yuanwei;Wang, Chao;Liu, Zhuang;Chan, Emory M.;Duan, Chunying;Han, Gang

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A class of biocompatible upconverting nanoparticles (UCNPs) with largely amplified red-emissions was developed. The optimal UCNP shows a high absolute upconversion quantum yield of 3.2% in red-emission, which is 15-fold stronger than the known optimal β-phase core/shell UCNPs. When conjugated to aminolevulinic acid, a clinically used photodynamic therapy (PDT) prodrug, significant PDT effect in tumor was demonstrated in a deep-tissue (>1.2 cm) setting in vivo at a biocompatible laser power density. Furthermore, we show that our UCNP–PDT system with NIR irradiation outperforms clinically used red light irradiation in a deep tumor setting in vivo. This study marks a major step forward in photodynamic therapy utilizing UCNPs to effectively access deep-set tumors. It also provides an opportunity for the wide application of upconverting red radiation in photonics and biophotonics.
上转换纳米颗粒:设计、纳米化学及其在治疗诊断学中的应用
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