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Updated: Aug 20, 2026

Live Imaging to Quantify Cellular Radiosensitivity in Patient-Derived Tumor Organoids
Published on: April 5, 2024
Molecular targets for potentiation of radiation-induced cell killing
1Department of Radiation Oncology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma 371-8511, Japan. takimoto@showa.gunma-u.ac.jp
Abstract:
Molecular target-based drugs have been emerging as a cancer treatment. Clinical trials using the combined approach of radiation therapy and molecular target-based drugs have been performed to evaluate the feasibility of this approach, and improve the response of tumors to radiation. To achieve maximum radiotherapeutic gain, understanding of the interaction of radiation and drugs are indispensable. Preclinical data have already demonstrated synergistic enhancement of radiation-induced cell killing by several molecular target-based drugs. Among these, the effect of drugs that target receptor tyrosine kinase and its signal transduction pathways on radiosensitivity has been intensively investigated. In this review, established and potential molecular targets for potentiation of radiation-induced cell killing are summarized, and preclinical data regarding investigations of new molecular targets for radiosensitization will be introduced. In addition, the results and toxicities of clinical trials using combined radiation therapy and molecular target-based drugs are summarized.
Insights
Molecularly targeted drugs enhance radiation therapy
Area of Science:
- Oncology
- Radiation Oncology
- Molecular Biology
Background:
- Molecular target-based drugs are a growing cancer treatment modality.
- Combining these drugs with radiation therapy (RT) is being explored to improve tumor response.
- Understanding drug-radiation interactions is crucial for optimizing radiotherapeutic gain.
Purpose of the Study:
- To review molecular targets that enhance radiation-induced cell killing.
- To introduce preclinical data on novel molecular targets for radiosensitization.
- To summarize clinical trial outcomes and toxicities of combined drug-RT approaches.
Main Methods:
- Literature review of preclinical and clinical studies.
- Focus on drugs targeting receptor tyrosine kinase pathways.
- Summary of established and potential molecular targets for radiosensitization.
Main Results:
- Preclinical data show synergistic enhancement of radiation-induced cell killing by molecularly targeted drugs.
- Receptor tyrosine kinase inhibitors have been extensively studied for their radiosensitizing effects.
- Clinical trials are evaluating the feasibility, efficacy, and toxicity of combined therapies.
Conclusions:
- Molecularly targeted drugs hold significant potential for enhancing radiation therapy.
- Further research into novel molecular targets and clinical evaluation is warranted.
- Optimizing combined drug-radiation strategies is key to improving cancer treatment outcomes.
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