VEGFA and neoplasm: Figure 2B presents the time course of the amount of adherent tumor cells as indicated by fluorescence intensity in a vessel segment, under control (shown in ○), 1 nM VEGF treatment (•), pretreatment with 2 mM cAMP and then 2 mM cAMP/1 nM VEGF treatment (▲) and pretreatment with 4 mM cAMP and then 4 mM cAMP/1 nM VEGF treatment (♦).