Tirbanibulin (Mesylate)

Tirbanibulin Mesylate (KX2-391 Mesylate) is an inhibitor of Src that targets the peptide substrate site of Src, with GI₅₀ of 9-60 nM in cancer cell lines. IC50 & Target: GI50: 9 nM (Src, in HuH7 cells), 13 nM (Src, in PLC/PRF/5 cells), 26 nM (Src, in Hep3B cells), 60 nM (Src, in HepG2 cells)^[1] In Vitro: Tirbanibulin Mesylate (KX2-391 Mesylate) is a Src inhibitor that is directed to the Src substrate pocket. Tirbanibulin (KX2-391) shows steep dose-response curves against Huh7 (GI₅₀=9 nM), PLC/PRF/5 (GI₅₀=13 nM), Hep3B (GI₅₀=26 nM), and HepG2 (GI₅₀=60 nM), four hepatic cell cancer (HCC) cell lines^[1]. Tirbanibulin Mesylate (KX2-391 Mesylate) is found to inhibit certain leukemia cells that are resistant to current commercially available drugs, such as those derived from chronic leukemia cells with the T3151 mutation. Tirbanibulin Mesylate (KX2-391 Mesylate) is evaluated in engineered Src driven cell growth assays inNIH3T3/c-Src527F and SYF/c-Src527F cells and exhibits GI₅₀ with 23 nM and 39 nM, respectively^[2]. In Vivo: Orally administered Tirbanibulin Mesylate (KX2-391 Mesylate) is shown to inhibit primary tumor growth and to suppress metastasis, in pre-clinical animal models of cancer^[2].