Related Experiment Video
Updated: Jun 1, 2026

Live Imaging to Quantify Cellular Radiosensitivity in Patient-Derived Tumor Organoids
Published on: April 5, 2024
Soy isoflavones sensitize cancer cells to radiotherapy
Gilda G Hillman1, Vinita Singh-Gupta
1Barbara Ann Karmanos Cancer Institute, Department of Radiation Oncology, Wayne State University School of Medicine, Detroit, MI 48201, USA. hillmang@karmanos.org
Abstract:
Soy isoflavones are dietary compounds isolated from soybeans, which are safe for human use and have mild anti-cancer properties. Soy isoflavones inhibit the activity of transcription factors and genes essential for tumor cell proliferation, invasion, and neovascularization, and it appears that soy isoflavones may enhance the effectiveness of conventional therapies against cancer. Soy isoflavones could be an effective complementary treatment given that they inhibit the survival signaling pathways of various cancer cells through altered activation of APE1/Ref-1, NF-κB, and HIF-1α, which are genes essential for tumor cell survival, tumor growth, and angiogenesis, thus making such cells more sensitive to radiotherapy. Studies in which soy isoflavones were given in conjunction with radiotherapy to prostate cancer patients suggest that soy isoflavones might also mitigate the adverse effects of radiation on normal tissues, probably by acting as antioxidants. These observations open new avenues for exploiting soy isoflavones as supplements to conventional therapies.
Insights
Soy isoflavones, derived from soybeans, show promise as a complementary cancer therapy. They inhibit tumor growth and enhance radiotherapy effectiveness while potentially reducing side effects.
Area of Science:
- Nutritional Biochemistry
- Oncology
- Molecular Biology
Background:
- Soy isoflavones are safe, naturally occurring compounds in soybeans.
- They possess mild anti-cancer properties.
- Conventional cancer therapies can be enhanced by soy isoflavones.
Purpose of the Study:
- To investigate the anti-cancer mechanisms of soy isoflavones.
- To evaluate their potential as an adjunct to conventional cancer treatments.
- To explore their role in sensitizing cancer cells to radiotherapy and mitigating side effects.
Main Methods:
- Analysis of soy isoflavone effects on key cancer cell signaling pathways.
- Review of studies involving soy isoflavones in conjunction with radiotherapy.
- Examination of molecular targets such as APE1/Ref-1, NF-κB, and HIF-1α.
Main Results:
- Soy isoflavones inhibit tumor cell proliferation, invasion, and neovascularization.
- They alter the activation of APE1/Ref-1, NF-κB, and HIF-1α, crucial for tumor survival and angiogenesis.
- Soy isoflavones may enhance cancer cell sensitivity to radiotherapy and act as antioxidants to protect normal tissues.
Conclusions:
- Soy isoflavones demonstrate potential as an effective complementary treatment for cancer.
- Their ability to inhibit critical survival pathways and protect normal tissues warrants further investigation.
- Soy isoflavones can be considered as supplements to conventional cancer therapies.
Related Concept Videos
Cancer Prevention
Some...
Cancer Prevention
Some...
Targeted Cancer Therapies
There are several types of targeted therapies against specific...
Targeted Cancer Therapies
There are several types of targeted therapies against specific...
Cancer Therapies
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
Cancer Therapies
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
