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Published on: May 22, 2020
Tumor microenvironment-responsive S-NSs-TPZ-ICG intelligent nanoplatforms for synergistically enhanced tumor
Xiangcao Li1, Shaojing Zhao1, Ke Yang1
1Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P. R. China. minhuanlan@csu.edu.cn.
Abstract:
Nanosheet carriers loaded with drugs and phototherapeutics are used for effective cancer therapy, but the process remains challenging. Here, we prepared sulfur nanosheets (S-NSs) and then loaded tirapazamine (TPZ) and indocyanine green (ICG) with a loading efficiency of 6.3% and 94%, respectively. The obtained S-NSs-TPZ-ICG exhibits near-infrared (NIR) fluorescence, high 1O2 generation and photothermal conversion capabilities, good biocompatibility, and tumor microenvironment responsiveness. In vivo and in vitro experiments reveal that S-NSs-TPZ-ICG can be selectively decomposed under acidic and H2O2 conditions to release TPZ and ICG, and significantly inhibit tumor growth under laser irradiation without obvious toxic side effects.
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