PT - JOURNAL ARTICLE AU - Joao B. Xavier AU - William K. Chang TI - Agent based models to investigate cooperation between cancer cells AID - 10.1101/031070 DP - 2015 Jan 01 TA - bioRxiv PG - 031070 4099 - http://biorxiv.org/content/early/2015/11/09/031070.short 4100 - http://biorxiv.org/content/early/2015/11/09/031070.full AB - We present a type of agent-based model that uses off-lattice spheres to represent individual cells in a solid tumor. The model calculates chemical gradients and determines the dynamics of the tumor as emergent properties of the interactions between the cells. As an example, we present an investigation of cooperation among cancer cells where cooperators secrete a growth factor that is costly to synthesize. Simulations reveal that cooperation is favored when cancer cells from the same lineage stay in close proximity. The result supports the hypothesis that kin selection, a theory that explains the evolution of cooperation in animals, also applies to cancers.