Fig. 5
PDGF autocrine loop is critical for VEGFR-2 down-expression and anti-VEGF resistance in GBM-associated ECs. a GBM tumor-derived ECs were treated with control IgG or antibody against PDGF-AA or PDGF-BB. Cell lysates were immunoblotted. b, c GBM tumor-derived ECs were transfected with control scrambled siRNA or siRNA targeting PDGFR-α and PDGFR-β. b Cell lysates were immunoblotted. c Cell proliferation was determined (n = 3, mean ± SEM). d GBM tumor-derived ECs were treated with Ki8751 and crenolanib at different doses. Cell proliferation was determined 4 days after treatment. Inhibition rates were calculated and expressed as % of control cells
