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Updated: Feb 26, 2026
Cytotoxic Efficacy of Photodynamic Therapy in Osteosarcoma Cells In Vitro
Published on: March 18, 2014
Ultrasound-responsive bone-targeting liposomes suppress osteosarcoma through enhanced ROS generation and immunogenic
Jingtao Xu1, Yuxing Chen1, Zhenxing Wang1
1Department of Orthopaedic Surgery, Chongqing Municipal Health Commission Key Laboratory of Musculoskeletal Regeneration and Translational Medicine/Orthopaedic Research Laboratory, The First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Chongqing 400016, PR China.
This study introduces a novel nano-immunoamplifier strategy for sonodynamic therapy (SDT) to treat osteosarcoma. The approach enhances reactive oxygen species (ROS) generation and activates immune responses, significantly suppressing tumor growth and metastasis.
Area of Science:
- Biomedical Engineering
- Nanomedicine
- Oncology
Background:
- Sonodynamic therapy (SDT) shows promise for deep-seated tumors like osteosarcoma.
- Improving SDT efficacy requires enhanced reactive oxygen species (ROS) generation and immune system activation.
Purpose of the Study:
- To develop an SDT-based nano-immunoamplifier strategy for osteosarcoma suppression.
- To enhance ROS generation and trigger endogenous immunoamplification pathways.
Main Methods:
- Constructed ultrasound-responsive, bone-targeting nanoliposomes (LPIM) encapsulating MnO₂ nanoparticles and indocyanine green (ICG).
- Utilized phytic acid (PA) for targeted delivery to osteosarcoma lesions.
- Leveraged MnO₂ to alleviate tumor hypoxia and reduce glutathione (GSH) levels, boosting ROS production.
Main Results:
- LPIM achieved targeted delivery to osteosarcoma sites within 24 hours in vivo.
- SDT activation with LPIM suppressed primary tumor growth by 93.5%, reduced osteolysis, and inhibited metastasis.
- MnO₂ release activated the cGAS-STING pathway, promoting endogenous immunoamplification.
Conclusions:
- The developed nano-immunoamplifier strategy offers a novel approach for SDT-based osteosarcoma treatment.
- This strategy enhances therapeutic outcomes by improving ROS generation and stimulating anti-tumor immunity.
