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Reduction of tumour bed effect after angiogenic stimulation
M Penhaligon1, V D Courtenay, R S Camplejohn
1Richard Dimbleby Department of Cancer Research, United Medical School, St Thomas Hospital, London.
The British Journal of Radiology
|December 1, 1988
Summary
Angiogenic stimulus from a regressed tumor significantly enhanced subsequent tumor growth in irradiated mouse skin. This suggests radiation-damaged stroma may recover capacity to support tumor growth over time.
Area of Science:
- Oncology
- Radiation Biology
- Tumor Microenvironment Research
Background:
- The tumor bed effect (TBE) assesses stromal function in supporting tumor growth.
- Radiation therapy can damage the tumor stroma, potentially impairing its ability to support regrowth.
- Understanding stromal recovery is crucial for predicting long-term radiation effects.
Purpose of the Study:
- To investigate the impact of an angiogenic stimulus on the TBE in irradiated C3H mouse skin.
- To determine if induced angiogenesis can restore the function of radiation-damaged stroma.
- To evaluate the potential for stromal recovery in late radiation damage.
Main Methods:
- A two-tumor system was established in C3H mouse skin pre-treated with 20 Gy X-rays.
- Lewis lung carcinoma (3LL) was used to induce angiogenesis, followed by complete regression.
- RIF-1 fibrosarcoma cells were implanted into stimulated sites to measure TBE via viable cell yield.
Main Results:
- Tumors grown in sites stimulated by prior 3LL tumor angiogenesis showed a ~10-fold increase in viable cell yield.
- This indicates substantial restoration of the radiation-damaged stroma's capacity to support tumor growth.
- The results highlight the role of angiogenesis in stromal repair and function.
Conclusions:
- Induced angiogenesis can significantly restore the tumor-supporting capacity of irradiated stroma.
- Slow stromal recovery might mitigate the importance of late radiation damage.
- Further research into stromal regeneration mechanisms is warranted.