A Genetically Truncated RGD-Containing Peptide rLj-RGD4 Exhibits Potent In Vivo Antitumor Activity via Induction of Multi-Pathway Apoptosis and EGFR-Targeted Signaling Suppression

and cytochalasin D, indicating actin-dependent macropinocytosis. Direct EGFR binding was confirmed, accompanied by reduced EGFR expression and the inhibition of FAK/AKT/Src signaling. In conclusion, rLj-RGD4 exerts potent in vivo antitumor activity via two mechanisms: induction of multi-pathway apoptosis and EGFR-targeted suppression of pro-survival signaling. RGD4 exerts its antitumor function in vivo by targeting and co-internalizing with EGFR.