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Tumor development under angiogenic signaling: a dynamical theory of tumor growth, treatment response, and
P Hahnfeldt1, D Panigrahy, J Folkman
1Department of Adult Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, USA.
Abstract:
The effects of the angiogenic inhibitors endostatin, angiostatin, and TNP-470 on tumor growth dynamics are experimentally and theoretically investigated. On the basis of the data, we pose a quantitative theory for tumor growth under angiogenic stimulator/inhibitor control that is both explanatory and clinically implementable. Our analysis offers a ranking of the relative effectiveness of these inhibitors. Additionally, it reveals the existence of an ultimate limitation to tumor size under angiogenic control, where opposing angiogenic stimuli come into dynamic balance, which can be modulated by antiangiogenic therapy. The competitive influences of angiogenically driven growth and inhibition underlying this framework may have ramifications for tissue size regulation in general.
Insights
This study investigates anti-angiogenic therapies, revealing a balance between tumor growth and inhibition. It ranks inhibitors and identifies a limit to tumor size, offering insights into cancer therapy and tissue regulation.
Area of Science:
- Oncology
- Biophysics
- Mathematical Biology
Background:
- Tumor growth is regulated by a balance of pro-angiogenic and anti-angiogenic factors.
- Angiogenic inhibitors like endostatin, angiostatin, and TNP-470 are crucial in cancer therapy.
- Understanding tumor growth dynamics under inhibitor control is vital for clinical applications.
Purpose of the Study:
- To experimentally and theoretically investigate the effects of endostatin, angiostatin, and TNP-470 on tumor growth.
- To develop a quantitative theory for tumor growth under angiogenic control.
- To rank the relative effectiveness of these angiogenic inhibitors.
Main Methods:
- Experimental investigation of tumor growth dynamics.
- Theoretical modeling of tumor growth under angiogenic stimulator/inhibitor control.
- Quantitative analysis of inhibitor effectiveness.
Main Results:
- A quantitative theory for tumor growth under angiogenic control was developed.
- The relative effectiveness of endostatin, angiostatin, and TNP-470 was ranked.
- An ultimate limitation to tumor size was identified due to a dynamic balance of angiogenic stimuli.
Conclusions:
- Anti-angiogenic therapy can modulate the ultimate tumor size.
- The developed framework has implications for tissue size regulation beyond cancer.
- This research provides a clinically implementable theory for tumor growth control.