4.8 Article

Furin-Instructed Intracellular Gold Nanoparticle Aggregation for Tumor Photothermal Therapy

期刊

ADVANCED FUNCTIONAL MATERIALS
卷 30, 期 50, 页码 -

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202001566

关键词

aggregation; furin; gold nanoparticles; photothermal agents; photothermal therapies

资金

  1. National Natural Science Foundation of China [21675001, 21725505, 21976004, 21936001]
  2. China Postdoctoral Science Foundation [2019TQ0399, 2020M673044]

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Today, exploring ideal photothermal agents (PTAs) for effective photothermal therapy (PTT) of cancer is an important issue. Cancer-related enzyme-instructed aggregation of gold nanoparticles less than 8 nm in diameter will significantly enhance the PTT efficiency of the traditional PTA gold nanoparticle (AuNP). Furin is a type of trans-Golgi protein convertase upregulated in multiple malignancies. However, furin-instructed intracellular aggregation of AuNP in cancer cells for PTT of tumor has not yet been reported. Herein, exploiting the advantages of furin and a biocompatible 2-cyanobenzothiazole-cysteine (CBT-Cys) condensation reaction, a furin-instructed intracellular gold nanoparticle aggregation strategy is developed and a furin-responsive gold nanoparticle platform (AuNP@1) is designed for effective PTT of cancer both in vitro and in vivo. After being internalized via the high furin-expression cancer cells, AuNP@1 is subject to a furin-guided condensation reaction to yield the 1-Dimers between AuNP@1s, which cross-link AuNP@1s to form aggregates of AuNP. Experimental results show that formation of AuNP aggregates can largely enhance its photothermal properties, as a result, AuNP@1 shows more efficient photothermal therapeutic effects than its scrambled control AuNP@1-Scr on MDA-MB-468 cells in vitro and MDA-MB-468 tumors in vivo. It is envisioned that AuNP@1 can be employed for the clinical PTT of furin-related cancer in the near future.

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