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Updated: Aug 8, 2026

Pretargeted Radioimmunotherapy Based on the Inverse Electron Demand Diels-Alder Reaction
Published on: January 29, 2019
Enhanced radiation response through directed molecular targeting approaches
Spencer J Collis1, Theodore L DeWeese
1Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins Oncology Center, Johns Hopkins University School of Medicine, Baltimore, Maryland 21231, USA.
Abstract:
In both the pre- and post-human genome sequencing eras, there has been an increase in the understanding of the molecular mechanisms influencing cellular sensitivity to DNA damaging agents such as ionizing radiation. Out of this work have arisen many cellular factors that could be specifically targeted, at the molecular level, to alter the functionality of a single protein or pathway involved in the response to radiation damage as a means to increase cell killing following radiation treatment. As such, there are many promising new combination radio-gene therapy approaches being developed and assessed in pre-clinical and clinical studies for several different malignancies. Combination of such modalities aims to increase the therapeutic index, giving rise to increased tumor cell killing with a simultaneous reduction in normal cell toxicity. Restricted delivery and/or targeting modalities combined with conformal radiotherapy regimes could provide significant local control of tumors, impeding their development into metastatic disease, which poses a greater challenge for palliative and curative treatments. This review will summarize current and novel gene therapy strategies that are being developed aimed at enhancing the effects of radiotherapy through the use of directed molecular targeting approaches.
Insights
Researchers are exploring new gene therapy strategies to enhance radiation therapy effectiveness. By targeting molecular pathways, these approaches aim to increase tumor cell killing while reducing normal tissue toxicity.
Area of Science:
- Molecular Biology
- Oncology
- Radiotherapy
Background:
- Advances in understanding molecular mechanisms of cellular sensitivity to DNA damaging agents like ionizing radiation have increased.
- Numerous cellular factors involved in radiation damage response have been identified for targeted intervention.
Purpose of the Study:
- To review current and novel gene therapy strategies for enhancing radiotherapy effects.
- To explore molecular targeting approaches to improve cancer treatment outcomes.
Main Methods:
- Review of pre-clinical and clinical studies on combination radio-gene therapy.
- Analysis of molecular targeting strategies for radiosensitization.
- Examination of delivery and targeting modalities for conformal radiotherapy.
Main Results:
- Development of promising combination radio-gene therapy approaches for various malignancies.
- Potential to increase the therapeutic index by enhancing tumor cell killing and reducing normal cell toxicity.
- Improved local tumor control and impediment of metastatic disease development.
Conclusions:
- Molecularly targeted gene therapy offers a promising avenue to enhance radiotherapy efficacy.
- Combination strategies aim to improve cancer treatment by increasing tumor cell death and minimizing side effects.
- Targeted approaches combined with conformal radiotherapy could significantly improve patient outcomes.
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