Figure 6. Proposed model for influence of adhesion strength on cell invasion.
We propose a model for cell invasion that involves a balance between formation and turnover of cell adhesions. (A) With little to no cell adhesion to the substrate, extrusion of the cell body through a confined space is not possible. (B) With an optimal balance between adhesion and detachment, as is the case with the relatively labile CD44-HA interaction, cells have the highest invasion potential. (C) When abundant integrin-based adhesion is present, the cells spread extensively and adhere robustly on the substrate but do not invade.