Figure 7. Dll4 inhibition increases the release of CXCL1/IL-8.
A, Ad-sDll4 increases the circulating levels of CXCL1 in mice with limb ischemia. *P<0.05, **P*lt;0.001 vs Ad-Null; #P<0.05, **P<0.01 vs nonischemic mice (control); n=6 each group. B, Left, IL-8 concentrations in conditioned media of THP1 monocytes cultured on immobilized Dll4 in the presence of TNF-α or vehicle. To block Notch, DAPT or vehicle (DMSO) was added. Right, Hes1 expression levels in the same experiment. *P<0.001 vs BSA; #P<0.001 vs vehicle; n=4. n.d. indicates not detectable. C, Left, IL-8 concentrations in conditioned media of THP1 monocytes cocultured with transfected HUVECs. Right, Hes1 expression levels in the same experiment. *P<0.001 vs BSA; #P<0.01 vs Ad-Null; n=4. D, Time-lapse video microscopy images illustrating the endothelial network formation by HUVECs on Matrigel in the presence of DiI-labeled THP1 cells (red). HUVECs were transfected with Ad-Null or Ad-sDll4 (100 plaque-forming units/cell).