Related Experiment Video
Updated: Jun 18, 2026

Pretargeted Radioimmunotherapy Based on the Inverse Electron Demand Diels-Alder Reaction
Published on: January 29, 2019
beta1 integrin targeting to enhance radiation therapy.
Jin-Min Nam1, Yoonsun Chung, Howard C Hsu
1Life Sciences Division, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94143-1708, USA.
Beta1 integrin signaling promotes cancer cell resistance to radiation therapy. Targeting these pathways may improve breast cancer treatment outcomes by enhancing radiosensitivity.
Area of Science:
- Oncology
- Cell Biology
- Radiotherapy Research
Background:
- Cell adhesion to extracellular matrix (ECM) proteins involves integrins.
- Integrin signaling influences cancer cell radiation sensitivity and resistance.
- Beta1 integrin signaling is linked to cancer progression, metastasis, and radioresistance.
Purpose of the Study:
- To review integrin targeting strategies in radiation therapy.
- To highlight updated findings on beta1 integrin signaling post-ionizing radiation (IR).
- To identify potential therapeutic targets for breast cancer radiation therapy.
Main Methods:
- Review of in vitro experimental models.
- Review of in vivo experimental models.
- Analysis of beta1 integrin-mediated signaling pathways.
Main Results:
- Beta1 integrin signaling pathways are activated by ionizing radiation.
- These pathways contribute to radiation resistance in cancer cells.
- Experimental models demonstrate the role of beta1 integrin in modulating radiosensitivity.
Conclusions:
- Integrin targeting is a viable strategy in radiation therapy.
- Beta1 integrin signaling pathways represent promising therapeutic targets.
- Targeting beta1 integrin may enhance the efficacy of radiation therapy for breast cancer.
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Activation of Integrins
In "outside-in signaling," external factors in the extracellular space bind to exposed ligand binding sites on integrins. This causes the inactive protein to undergo a conformational change to become active. Integrins are often clustered on the cell membrane. Repetitive and regularly spaced ligand binding events provide an effective stimulus.
Tumor Immunotherapy

