TAT-327 is cell-penetrating peptide. TAT-327 selectively inserts into cancer cell membranes and shows potent antitumor activity. TAT-327 effectively inhibits cancer cells proliferation, induces apoptosis and disrupts EGFR signal pathway by inhibiting downstream signals (such as IL-2, TNF-alpha and IFN-gamma) expression and the Eps8/EGFR interaction. TAT-327 significantly inhibits tumor growth in HT-29 xenograft mcie models[1].