Figure 6: The relative ratio of cell proliferation versus mediator release from HUVECs after VPA treatment. The proliferation of HUVECs after 0.6 mM VPA treatment was reduced to 71% of drug-free controls, and the figure shows the relative ratio values of proliferation after 0.6 mM VPA treatment versus the concentration of various soluble mediators measured in HUVEC cultures after 0.6 mM VPA treatment.