Modeling VEGF and GLUT1 Expression as Coadapted Foraging Strategies in Cancer

Area of Science:

• Oncology
• Mathematical Biology
• Game Theory

Background:

• Natural selection favors cancer cells with efficient nutrient uptake strategies within the tumor microenvironment.
• Vascular endothelial growth factor (VEGF) and glucose transporter 1 (GLUT1) are key foraging traits often co-expressed in aggressive tumors.
• VEGF promotes angiogenesis, influencing nutrient availability, while GLUT1 mediates cellular glucose uptake.

Purpose of the Study:

• To develop and analyze a game-theoretic model of coadaptation between VEGF and GLUT1 foraging traits in cancer cells.
• To investigate the impact of resource-sharing dynamics on VEGF expression and therapeutic efficacy.
• To evaluate the relative effectiveness of inhibiting VEGF and GLUT1 in different microenvironmental contexts.

Main Methods:

• Developed a game-theoretic model analyzing the interplay between VEGF and GLUT1 expression.
• Modeled VEGF's influence on nutrient availability at the neighborhood level and GLUT1's role at the cellular level.
• Introduced a resource-sharing continuum for VEGF, exploring scenarios from no sharing to uniform sharing.

Main Results:

• No resource sharing leads to excessive VEGF production (tragedy of the commons).
• Uniform resource sharing results in a public goods game with optimal VEGF expression.
• GLUT1 inhibition is generally more effective than VEGF inhibition, particularly in high resource-sharing environments.

Conclusions:

• The coadaptation of VEGF and GLUT1 is crucial for understanding tumor growth and aggression.
• Therapeutic strategies targeting nutrient uptake, especially GLUT1, show promise.
• The degree of resource sharing in the tumor microenvironment significantly impacts treatment effectiveness.