Caspase-3/7 inbibitor I is a potent, reversible, isatin sulfonamide-based inhibitor of caspase-3 (KI(app) = 60 nM) and caspase-7 (KI(app) = 170 nM). Is a weaker inhibitor of caspase-9 (Ki(app) = 3.1 mM). It Has only a trivial effect (Ki(app) >25 mM) on the activities of caspase-1, caspase-2, caspase-4, caspase-6, and caspase-8. It has been shown to inhibit apoptosis in camptothecin treated Jurkat cells (IC50 ~50 μM). Also it has been reported to inhibit apoptosis in chondrocytes (44% inhibition at 10 μM and 98% inhibition at 50 μM). Selectivity for caspases-3 and 7 involves unique hydrophobic residues in the S2 pocket surrounding the catalytic cysteine residue. [1] [2] In some systems inhibition of caspases-3 and -7 can prevent apoptosis and may therefore have important therapeutic implications. [3]

A potent, cell-permeable, and specific, reversible inhibitor of caspase-3 (Ki = 60 nM) and caspase-7 (Ki = 170 nM).

References:

1. Lee, D., et al. 2001. J. Med. Chem. 44, 2015.

2. Lee, D., et al. 2000. J. Biol. Chem. 275, 16007.

3. Clements, K. M., Burton‐Wurster, N., Nuttall, M. E., & Lust, G. (2005). Caspase‐3/7 inhibition alters cell morphology in mitomycin‐c treated chondrocytes. Journal of cellular physiology, 205(1), 133-140.

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