MMP-9 inhibitor I is an inhibitor of matrix metalloproteinase-9 (MMP-9) that is selective over MMP-1 and MMP-13 (IC50s = 5, 1,050, and 113 nM, respectively). It also decreases the activity of TNF-α converting enzyme (TACE) in a dose-dependent manner (IC50 = 0.54 μM). MMP-9 inhibitor I decreases TNF-α secretion stimulated by LPS in BV-2 microglial cells when used at concentrations of 50 and 100 μM.
Prinomastat hydrochloride is a orally active inhibitor of metalloproteinase (MMP)(MMP-1, MMP-3 and MMP-9 with IC50s of 79, 6.3 and 5.0 nM , respectively),with Antitumor avtivity.