
Repotrectinib Biological Activity
Description:Repotrectinib (TPX-0005) is a potent ALK/ROS1/TRK inhibitor, with IC50 of 5.3 nM, 1.01 nM, 1.26 nM and 1.08 nM for SRC, WT ALK, ALK G1202R and ALK L1196M, respectively.
Target:IC50: 5.3 nM (SRC), 1.01 nM (WT ALK), 1.26 nM (ALK G1202R), 1.08 nM (ALK L1196M)
In Vitro:Repotrectinib (TPX-0005) effectively overcomes this primary resistance (IC50 100 nM in cell proliferation assay) with strong inhibition of the phosphorylation of EML4-ALK (IC50 13 nM) and the SRC substrate paxillin (IC50 107 nM). Repotrectinib inhibits H2228 cell migration in a wound healing assay with similar activity to saracatinib.
In Vivo:Repotrectinib (TPX-0005) effectively inhibits tumor growth in vivo in ALK WT and ALK G1202R xenografts.