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Updated: Dec 26, 2025
Tumor Hypoxia Assessment: In Vivo 3D Oxygen Imaging Through Electron Paramagnetic Resonance
Published on: February 14, 2025
Design strategy of optical probes for tumor hypoxia imaging
Fengfeng Xue1, Jufeng Chen1,2, Hangrong Chen3
1State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China.
Abstract:
Clinical manifestations of tumors indicate that malignant phenotypes developing in the hypoxic microenvironment lead to resistance to cancer treatment, rendering chemotherapy, radiotherapy, and photodynamic therapy less sensitive and effective in patients with tumor. Visualizing the oxygen level in the tumor environment has garnered much attention due to its implications in precision tumor therapy. Following the rapid development of biomaterials in nanotechnology, various nanomaterials have been designed to visualize the oxygen levels in tumors. Here, we review recent research on detecting oxygen levels in solid tumors for tumor hypoxia imaging. To monitor the hypoxic level of tumors, two main strategies were investigated: directly detecting oxygen levels in tumors and monitoring the hypoxia-assisted reduced microenvironment. We believe that hypoxia as a tumor-specific microenvironment can be a breakthrough in the clinical treatment of tumors.
Insights
Tumor hypoxia, a state of low oxygen, drives cancer treatment resistance. Nanomaterials offer new ways to visualize tumor oxygen levels, aiding precision cancer therapy.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Oncology
Background:
- Malignant tumors often develop in a hypoxic microenvironment, leading to resistance against conventional cancer treatments like chemotherapy and radiotherapy.
- Visualizing tumor oxygen levels is crucial for developing precision tumor therapies.
- The advancement of nanotechnology has enabled the design of novel nanomaterials for tumor hypoxia imaging.
Purpose of the Study:
- To review recent research on detecting oxygen levels in solid tumors for tumor hypoxia imaging.
- To highlight the potential of nanomaterials in visualizing tumor oxygen levels.
- To discuss strategies for monitoring tumor hypoxia.
Main Methods:
- Review of current literature on nanomaterial-based tumor hypoxia imaging.
- Analysis of two primary strategies: direct oxygen level detection and monitoring of the hypoxia-assisted reduced microenvironment.
- Focus on applications of nanotechnology in visualizing tumor oxygen.
Main Results:
- Various nanomaterials have been developed to visualize oxygen levels within tumors.
- Two main strategies are effective for monitoring tumor hypoxia: direct oxygen detection and indirect monitoring of the tumor microenvironment.
- Nanomaterial-based imaging provides insights into tumor oxygenation.
Conclusions:
- Tumor hypoxia is a significant factor in treatment resistance.
- Nanomaterials show promise for accurate tumor hypoxia imaging.
- Targeting the hypoxic tumor microenvironment represents a potential breakthrough for improved clinical cancer treatment.
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