Plasmon enhanced catalysis-driven nanomotors with autonomous navigation for deep cancer imaging and enhanced radiotherapy

Radiosensitizers potentiate the radiotherapy effect while effectively reducing the damage to healthy tissues. However, limited sample accumulation efficiency and low radiation energy deposition in the tumor significantly reduce the therapeutic effect. Herein, we developed multifunctional photocataly...

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Bibliographic Details
Published in:Chemical science (Cambridge) 2022-11, Vol.13 (43), p.1284-1285
Main Authors: Liu, Luntao, Li, Qingqing, Chen, Lanlan, Song, Lihong, Zhang, Xueqiang, Huo, Hongqi, You, Zhixin, Wu, Ying, Wu, Zongsheng, Ye, Jiamin, Fu, Qinrui, Su, Lichao, Zhang, Xuan, Yang, Huanghao, Song, Jibin
Format: Article
Language:English
Subjects:
Autonomous navigation
Cancer
Catalysis
Catalytic activity
Chemistry
Damage accumulation
Depletion
Deposition
Glutathione
Gold
Heterojunctions
Hot electrons
Hydroxyl radicals
Medical imaging
Nanorods
Nanotechnology devices
Photocatalysis
Radiation damage
Radiation dosage
Radiation therapy
Titanium dioxide
Tumors
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Summary:Radiosensitizers potentiate the radiotherapy effect while effectively reducing the damage to healthy tissues. However, limited sample accumulation efficiency and low radiation energy deposition in the tumor significantly reduce the therapeutic effect. Herein, we developed multifunctional photocatalysis-powered dandelion-like nanomotors composed of amorphous TiO 2 components and Au nanorods (∼93 nm in length and ∼16 nm in outer diameter) by a ligand-mediated interface regulation strategy for NIR-II photoacoustic imaging-guided synergistically enhanced cancer radiotherapy. The non-centrosymmetric nanostructure generates stronger local plasmonic near-fields close to the Au-TiO 2 interface. Moreover, the Au-TiO 2 Schottky heterojunction greatly facilitates the separation of photogenerated electron-hole pairs, enabling hot electron injection, finally leading to highly efficient plasmon-enhanced photocatalytic activity. The nanomotors exhibit superior motility both in vitro and in vivo , propelled by H 2 generated via NIR-catalysis on one side of the Au nanorod, which prevents them from returning to circulation and effectively improves the sample accumulation in the tumor. Additionally, a high radiation dose deposition in the form of more hydroxyl radical generation and glutathione depletion is authenticated. Thus, synergistically enhanced radiotherapeutic efficacy is achieved in both a subcutaneous tumor model and an orthotopic model. The limited accumulation and poor radiosensitization of radiosensitizers greatly reduce the therapeutic effects. Here, we developed Janus AuNR-TiO 2 nanomotors for deep cancer photoacoustic imaging and enhanced radiotherapy.
ISSN:2041-6520
2041-6539
DOI:10.1039/d2sc03036e