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Dual pH-triggered catalytic selective Mn clusters for cancer radiosensitization and radioprotection

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Abstract

Hypoxia is known to be a common feature within many types of solid tumors, which is closely related to the limited efficacy of radiotherapy. Meanwhile, due to the non-discriminatory killing effect of both normal and cancer cells during the radiation process, traditional radiosensitizers could bring severe non-negligible side-effects to the whole body. In this work, stable and atomically precise Mn clusters which possess efficient pH-triggered catalytic selective capacity are developed rationally. Mn clusters could efficiently catalyze oxygen production in an acidic tumor microenvironment, while exhibiting strong reducibility and free radical scavenging ability in neutral circumstances. In vivo experiments show that Mn clusters are able to enhance the radiotherapy effect in the mouse model of 4T1 tumors and protect normal tissues from radiation at the same time. Thus, the present work provides a novel dual-functional strategy to enhance radiotherapy-induced tumor treatment by improving tumor oxygenation and protect normal tissues from radiation simultaneously.

Graphical abstract: Dual pH-triggered catalytic selective Mn clusters for cancer radiosensitization and radioprotection

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Publication details

The article was received on 23 Sep 2019, accepted on 05 Nov 2019 and first published on 07 Nov 2019


Article type: Paper
DOI: 10.1039/C9NR08192E
Nanoscale, 2019, Advance Article

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    Dual pH-triggered catalytic selective Mn clusters for cancer radiosensitization and radioprotection

    S. Lv, W. Long, J. Chen, Q. Ren, J. Wang, X. Mu, H. Liu, X. Zhang and R. Zhang, Nanoscale, 2019, Advance Article , DOI: 10.1039/C9NR08192E

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