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Bismuth Sulfide Nanorods with Retractable Zinc Protoporphyrin Molecules for Suppressing Innate Antioxidant Defense System and Strengthening Phototherapeutic Effects
Author(s) -
Cheng Yan,
Chang Yun,
Feng Yanlin,
Jian Hui,
Wu Xiaqing,
Zheng Runxiao,
Xu Keqiang,
Zhang Haiyuan
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201806808
Subject(s) - nanorod , photothermal therapy , materials science , reactive oxygen species , photodynamic therapy , photothermal effect , nanodevice , photosensitizer , nanomaterials , protoporphyrin ix , in vivo , nanotechnology , photochemistry , chemistry , biochemistry , organic chemistry , microbiology and biotechnology , biology
Bismuth (Bi)‐based nanomaterials (NMs) are widely used for computed tomography (CT) imaging guided photothermal therapy, however, the photodynamic property is hardly exhibited by these NMs due to the fast electron–hole recombination within their narrow bandgap. Herein, a sophisticated nanosystem is designed to endow bismuth sulfide (Bi 2 S 3 ) nanorods (NRs) with potent photodynamic property. Zinc protoporphyrin IX (ZP) is linked to Bi 2 S 3 NRs through a thermoresponsive polymer to form BPZP nanosystems. The stretching ZP could prebind to the active site of heme oxygenase‐1 overexpressed in cancer cells, suppressing the cellular antioxidant defense capability. Upon NIR laser irradiation, the heat released from Bi 2 S 3 NRs could retract the polymer and drive ZP to the proximity of Bi 2 S 3 NRs, facilitating an efficient electron–hole separation in ZP and Bi 2 S 3 NRs, and leading to reactive oxygen species generation. In vitro and in vivo studies demonstrate the promising photodynamic property of BPZP, together with their photothermal and CT imaging performance.