Issue 35, 2021, Issue in Progress

Gold nanoclusters as a GSH activated mitochondrial targeting photosensitizer for efficient treatment of malignant tumors

Abstract

Gold nanoclusters (Au NCs), which have the characteristics of small size, near infrared (NIR) absorption and long triplet excited lifetime, have been used as a new type of photosensitizer for deep tissue photodynamic therapy (PDT). However, the therapeutic efficiency of the nano-system based on Au NCs still needs to be improved. Herein, we proposed a strategy using Mito-Au25@MnO2 nanocomposites to achieve enhanced PDT. Au25(Capt)18 nanoclusters were applied as photosensitizers and further modified with peptides to target mitochondrial and MnO2 nanosheets to consume glutathione (GSH). In the presence of GSH, Mito-Au25@MnO2 dis-integrated and Mito-Au25 nanoparticles realized accurate mitochondrial targeting. Under the irradiation of 808 nm light, the nanocomposite ensured highly efficient PDT both in vitro and in vivo via oxidation pressure elevation and mitochondrial targeting in cancer cells.

Graphical abstract: Gold nanoclusters as a GSH activated mitochondrial targeting photosensitizer for efficient treatment of malignant tumors

Supplementary files

Article information

Article type
Paper
Submitted
04 May 2021
Accepted
03 Jun 2021
First published
16 Jun 2021
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2021,11, 21384-21389

Gold nanoclusters as a GSH activated mitochondrial targeting photosensitizer for efficient treatment of malignant tumors

C. Fan, S. Zhai, W. Hu, S. Chi, D. Song and Z. Liu, RSC Adv., 2021, 11, 21384 DOI: 10.1039/D1RA03469C

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