TAPI-2 is an inhibitor of TACE, ADAMs, ACE secretase, and other MMPs (metalloproteinases). TAPI-2 blocks release of DCC7, APP, TNFα, L-selectin, NOTCH, TGFα, IL-6R9, erbB2/HER2, and ACE. This inhibitor has been used in tissue culture.
KP-457 is a selective a disintegrin and metalloproteinase 17 (ADAM17) inhibitor, with higher selectivity for ADAM17 than for other MMPs and ADAM10, and IC50s are 11.1 nM (ADAM17), 748 nM (ADAM10), 717 nM (MMP2), 9760 nM (MMP3), 2200 nM (MMP8), 5410 nM (MMP9), 930 nM (MMP13), 2140 nM (MMP14), and 7100 nM (MMP17), respectively.