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Vacancy Augmented Piezo-Sonosensitizer for Cancer Therapy
Qingyuan Wu1, Jie Zhang1, Xueting Pan1
1Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Bionanomaterials & Translational Engineering Laboratory, Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
Engineered molybdenum disulfide nanoflowers with sulfur vacancies enhance cancer sonodynamic therapy (SDT). These novel piezo-sonosensitizers improve reactive oxygen species generation for effective in vitro and in vivo anticancer treatment.
Area of Science:
- Materials Science
- Nanotechnology
- Biomedical Engineering
Background:
- Sonodynamic therapy (SDT) offers noninvasive cancer treatment with high penetration.
- Developing efficient sonosensitizers is crucial for advancing SDT.
- Molybdenum disulfide (MoS2) shows potential as a sonosensitizer.
Purpose of the Study:
- To design and synthesize sulfur-vacancies-engineered MoS2 nanoflowers (Sv-MoS2 NF) as improved piezo-sonosensitizers.
- To investigate the mechanism of enhanced reactive oxygen species (ROS) generation under ultrasonic stimulation.
- To evaluate the in vitro and in vivo anticancer efficacy and biocompatibility of Sv-MoS2 NF.
Main Methods:
- Synthesis of MoS2 nanoflowers (NF) and introduction of sulfur vacancies to create Sv-MoS2 NF.
- Characterization of Sv-MoS2 NF for structural and piezoelectric properties.
- In vitro and in vivo experiments to assess ROS generation, cancer cell killing, and tumor inhibition.
- Biocompatibility testing of Sv-MoS2 NF.
Main Results:
- Sv-MoS2 NF exhibited enhanced piezoelectric properties due to sulfur vacancies.
- Ultrasonic stimulation of Sv-MoS2 NF induced piezoelectric polarization and band tilting, improving charge carrier separation.
- Enhanced ROS production by Sv-MoS2 NF led to significant in vitro and in vivo anticancer effects.
- Sv-MoS2 NF demonstrated good biocompatibility.
Conclusions:
- Vacancy engineering in MoS2 NF is a viable strategy to create efficient piezo-sonosensitizers.
- Sv-MoS2 NF represent a promising platform for advanced sonodynamic cancer therapy.
- This approach offers a novel pathway for developing effective and biocompatible sonosensitizers.
