Hypoxia Activated Chemotherapy Drug AQ4N and Carbon Dots Self-assembly for Chemotherapy Combined with Sonodynamic Therapy of Tumors

PANG E, TANG Yuanyu, ZHAO Shaojing, CHENG Qiang, WANG Chen, CHEN Jianmin, LAN Minhuan

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Chem J Chin Univ ›› 2025, Vol. 46 ›› Issue (6) : 84-94. DOI: 10.7503/cjcu20240489
Article

Hypoxia Activated Chemotherapy Drug AQ4N and Carbon Dots Self-assembly for Chemotherapy Combined with Sonodynamic Therapy of Tumors

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Abstract

A red fluorescent carbon dots(CDs) with sonodynamic activity were synthesized, and the CDs@AQ4N nano-assemblies were prepared by assembling the hypoxia-activating drug AQ4N, with CDs via electrostatic interaction, hydrogen bonding, and π-π interactions. CDs@AQ4N could effectively generate singlet oxygen(1O2) for sonodynamic therapy(SDT) of cancer cells. Moreover, the depletion of intra-tumor oxygen during SDT further exacerbated the tumor hypoxia, which activated AQ4N and converted it into cytotoxic AQ4, enabling fluorescence-imaging-guided combination of SDT and chemotherapy for the treatment of mice tumors. The excellent biosafety of CDs@AQ4N was confirmed by mouse major organ sections, blood routine and blood biochemical analyses.

Key words

Carbon dots / Hypoxic activation / Sonodynamic therapy / Chemotherapy / Synergistic therapy

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PANG E , TANG Yuanyu , ZHAO Shaojing , et al . Hypoxia Activated Chemotherapy Drug AQ4N and Carbon Dots Self-assembly for Chemotherapy Combined with Sonodynamic Therapy of Tumors. Chemical Journal of Chinese Universities. 2025, 46(6): 84-94 https://doi.org/10.7503/cjcu20240489

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Funding

the National Key Research and Development Program of China(2022YFA1207600)
the National Natural Science Foundation of China(62375289)
the Key Laboratory of Pharmaceutical Analysis and Laboratory Medicine(Putian University), Fujian Province University, China(PALM 202201)

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