Fluorometric Enzymatic Assay: Selectivity of compound 55, compound 63, compound 48, compound 57, compound 88 toward caspase-1 (pro-inflammatory group), caspase-5 (group I), caspase-9 (group II) and caspase-3 and caspase-7 (group III) was evaluated by using fluorometric methods using the Caspase-1, -3, -5, -7, -9 Inhibitor Drug Screening Kit (Catalog #: K151-100, K153-100, K155-100/K157-100, K159-100 respectively, BioVision). Briefly, using instructions of the manufacturer, a wide range of different concentrations of the compound: 3333, 1000, 333, 100, 33, 10, 3, and 1 nM (final concentration) was added directly to the reaction mixtures containing the substrate and the enzyme in a final volume of 10 ul. After a 30-minute incubation at 37 C., the liberation of AFC was measured as an endpoint assay using the Flexstation3 (Molecular Devices) with an excitation wavelength of 400 nm and an emission wavelength of 505 nm. The level of inhibition of caspase-1, -3, -5, -7, -9 activity was determined by comparison.
Inhibition Assay: To test the efficacy of caspase-3 inhibitors at the cellular level, the ability of selected compounds to inhibit the proteolytic cleavage of PARP (poly ADP-ribose polymerase) was evaluated in live Hela cells.Briefly, in this assay Hela cells are seeded in 96 well plates and incubated for 4 hours with staurosporine, a well characterized inducer of apoptosis, alone or together with different concentrations of compound (50, 25, 10 and 3 uM). After formaldehyde-based fixation, the cells are stained with a fluorescein-labeled anti-cleaved PARP antibody (Cell signaling, Cat#: 9547) and counterstained with Hoechst33342 (Invitrogen, Cat#: H3570) to mark all nuclei.
Fluorometric Enzymatic Assay: The inhibition of the activity of Caspase-1 to -10 by four different compounds (#53, #111, #123 & Z-DEVD-FMK used as a prodrug: z-D(OMe)E(OMe)VD(OMe)FMK (comparison control compound, SM Biochemicals LLC, Cat# SMFMK003)) and their respective IC50 values were determined using a fluorometric enzymatic assay (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25) and Caspase Fluorometric Substrate Set II Plus (BioVision, Cat# K137-9-25)) on a Flexstation 3x (Molecular Devices). In brief, each compound was serially diluted for a final test concentration range of 0.1 nM to 3.3 uM (10-point titration). Each active recombinant Caspase (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25)) was added to the respective wells of the 96-well High Efficiency plates (Molecular Devices, Cat#75-000-0005), followed by the addition of the diluted test compounds. DMSO (Final=1%) or Z-VAD-FMK (Caspase-Family Inhibitor, Z-VAD-FMK (BioVision, Cat#1010-100).
Fluorometric Enzymatic Assay: The inhibition of the activity of Caspase-1 to -10 by four different compounds (#53, #111, #123 & Z-DEVD-FMK used as a prodrug: z-D(OMe)E(OMe)VD(OMe)FMK (comparison control compound, SM Biochemicals LLC, Cat# SMFMK003)) and their respective IC50 values were determined using a fluorometric enzymatic assay (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25) and Caspase Fluorometric Substrate Set II Plus (BioVision, Cat# K137-9-25)) on a Flexstation 3x (Molecular Devices). In brief, each compound was serially diluted for a final test concentration range of 0.1 nM to 3.3 uM (10-point titration). Each active recombinant Caspase (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25)) was added to the respective wells of the 96-well High Efficiency plates (Molecular Devices, Cat#75-000-0005), followed by the addition of the diluted test compounds. DMSO (Final=1%) or Z-VAD-FMK (Caspase-Family Inhibitor, Z-VAD-FMK (BioVision, Cat#1010-100).
Fluorometric Enzymatic Assay: The inhibition of the activity of Caspase-1 to -10 by four different compounds (#53, #111, #123 & Z-DEVD-FMK used as a prodrug: z-D(OMe)E(OMe)VD(OMe)FMK (comparison control compound, SM Biochemicals LLC, Cat# SMFMK003)) and their respective IC50 values were determined using a fluorometric enzymatic assay (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25) and Caspase Fluorometric Substrate Set II Plus (BioVision, Cat# K137-9-25)) on a Flexstation 3x (Molecular Devices). In brief, each compound was serially diluted for a final test concentration range of 0.1 nM to 3.3 uM (10-point titration). Each active recombinant Caspase (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25)) was added to the respective wells of the 96-well High Efficiency plates (Molecular Devices, Cat#75-000-0005), followed by the addition of the diluted test compounds. DMSO (Final=1%) or Z-VAD-FMK (Caspase-Family Inhibitor, Z-VAD-FMK (BioVision, Cat#1010-100).
Fluorometric Enzymatic Assay: Selectivity of compound 55, compound 63, compound 48, compound 57, compound 88 toward caspase-1 (pro-inflammatory group), caspase-5 (group I), caspase-9 (group II) and caspase-3 and caspase-7 (group III) was evaluated by using fluorometric methods using the Caspase-1, -3, -5, -7, -9 Inhibitor Drug Screening Kit (Catalog #: K151-100, K153-100, K155-100/K157-100, K159-100 respectively, BioVision). Briefly, using instructions of the manufacturer, a wide range of different concentrations of the compound: 3333, 1000, 333, 100, 33, 10, 3, and 1 nM (final concentration) was added directly to the reaction mixtures containing the substrate and the enzyme in a final volume of 10 ul. After a 30-minute incubation at 37 C., the liberation of AFC was measured as an endpoint assay using the Flexstation3 (Molecular Devices) with an excitation wavelength of 400 nm and an emission wavelength of 505 nm. The level of inhibition of caspase-1, -3, -5, -7, -9 activity was determined by comparison.
Fluorometric Enzymatic Assay: The inhibition of the activity of Caspase-1 to -10 by four different compounds (#53, #111, #123 & Z-DEVD-FMK used as a prodrug: z-D(OMe)E(OMe)VD(OMe)FMK (comparison control compound, SM Biochemicals LLC, Cat# SMFMK003)) and their respective IC50 values were determined using a fluorometric enzymatic assay (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25) and Caspase Fluorometric Substrate Set II Plus (BioVision, Cat# K137-9-25)) on a Flexstation 3x (Molecular Devices). In brief, each compound was serially diluted for a final test concentration range of 0.1 nM to 3.3 uM (10-point titration). Each active recombinant Caspase (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25)) was added to the respective wells of the 96-well High Efficiency plates (Molecular Devices, Cat#75-000-0005), followed by the addition of the diluted test compounds. DMSO (Final=1%) or Z-VAD-FMK (Caspase-Family Inhibitor, Z-VAD-FMK (BioVision, Cat#1010-100).
Fluorometric Enzymatic Assay: The inhibition of the activity of Caspase-1 to -10 by four different compounds (#53, #111, #123 & Z-DEVD-FMK used as a prodrug: z-D(OMe)E(OMe)VD(OMe)FMK (comparison control compound, SM Biochemicals LLC, Cat# SMFMK003)) and their respective IC50 values were determined using a fluorometric enzymatic assay (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25) and Caspase Fluorometric Substrate Set II Plus (BioVision, Cat# K137-9-25)) on a Flexstation 3x (Molecular Devices). In brief, each compound was serially diluted for a final test concentration range of 0.1 nM to 3.3 uM (10-point titration). Each active recombinant Caspase (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25)) was added to the respective wells of the 96-well High Efficiency plates (Molecular Devices, Cat#75-000-0005), followed by the addition of the diluted test compounds. DMSO (Final=1%) or Z-VAD-FMK (Caspase-Family Inhibitor, Z-VAD-FMK (BioVision, Cat#1010-100).
Fluorometric Enzymatic Assay: The inhibition of the activity of Caspase-1 to -10 by four different compounds (#53, #111, #123 & Z-DEVD-FMK used as a prodrug: z-D(OMe)E(OMe)VD(OMe)FMK (comparison control compound, SM Biochemicals LLC, Cat# SMFMK003)) and their respective IC50 values were determined using a fluorometric enzymatic assay (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25) and Caspase Fluorometric Substrate Set II Plus (BioVision, Cat# K137-9-25)) on a Flexstation 3x (Molecular Devices). In brief, each compound was serially diluted for a final test concentration range of 0.1 nM to 3.3 uM (10-point titration). Each active recombinant Caspase (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25)) was added to the respective wells of the 96-well High Efficiency plates (Molecular Devices, Cat#75-000-0005), followed by the addition of the diluted test compounds. DMSO (Final=1%) or Z-VAD-FMK (Caspase-Family Inhibitor, Z-VAD-FMK (BioVision, Cat#1010-100).
Fluorometric Enzymatic Assay: The inhibition of the activity of Caspase-1 to -10 by four different compounds (#53, #111, #123 & Z-DEVD-FMK used as a prodrug: z-D(OMe)E(OMe)VD(OMe)FMK (comparison control compound, SM Biochemicals LLC, Cat# SMFMK003)) and their respective IC50 values were determined using a fluorometric enzymatic assay (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25) and Caspase Fluorometric Substrate Set II Plus (BioVision, Cat# K137-9-25)) on a Flexstation 3x (Molecular Devices). In brief, each compound was serially diluted for a final test concentration range of 0.1 nM to 3.3 uM (10-point titration). Each active recombinant Caspase (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25)) was added to the respective wells of the 96-well High Efficiency plates (Molecular Devices, Cat#75-000-0005), followed by the addition of the diluted test compounds. DMSO (Final=1%) or Z-VAD-FMK (Caspase-Family Inhibitor, Z-VAD-FMK (BioVision, Cat#1010-100).
Fluorometric Enzymatic Assay: The inhibition of the activity of Caspase-1 to -10 by four different compounds (#53, #111, #123 & Z-DEVD-FMK used as a prodrug: z-D(OMe)E(OMe)VD(OMe)FMK (comparison control compound, SM Biochemicals LLC, Cat# SMFMK003)) and their respective IC50 values were determined using a fluorometric enzymatic assay (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25) and Caspase Fluorometric Substrate Set II Plus (BioVision, Cat# K137-9-25)) on a Flexstation 3x (Molecular Devices). In brief, each compound was serially diluted for a final test concentration range of 0.1 nM to 3.3 uM (10-point titration). Each active recombinant Caspase (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25)) was added to the respective wells of the 96-well High Efficiency plates (Molecular Devices, Cat#75-000-0005), followed by the addition of the diluted test compounds. DMSO (Final=1%) or Z-VAD-FMK (Caspase-Family Inhibitor, Z-VAD-FMK (BioVision, Cat#1010-100).
Fluorometric Enzymatic Assay: The inhibition of the activity of Caspase-1 to -10 by four different compounds (#53, #111, #123 & Z-DEVD-FMK used as a prodrug: z-D(OMe)E(OMe)VD(OMe)FMK (comparison control compound, SM Biochemicals LLC, Cat# SMFMK003)) and their respective IC50 values were determined using a fluorometric enzymatic assay (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25) and Caspase Fluorometric Substrate Set II Plus (BioVision, Cat# K137-9-25)) on a Flexstation 3x (Molecular Devices). In brief, each compound was serially diluted for a final test concentration range of 0.1 nM to 3.3 uM (10-point titration). Each active recombinant Caspase (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25)) was added to the respective wells of the 96-well High Efficiency plates (Molecular Devices, Cat#75-000-0005), followed by the addition of the diluted test compounds. DMSO (Final=1%) or Z-VAD-FMK (Caspase-Family Inhibitor, Z-VAD-FMK (BioVision, Cat#1010-100).
Fluorometric Enzymatic Assay: Selectivity of compound 55, compound 63, compound 48, compound 57, compound 88 toward caspase-1 (pro-inflammatory group), caspase-5 (group I), caspase-9 (group II) and caspase-3 and caspase-7 (group III) was evaluated by using fluorometric methods using the Caspase-1, -3, -5, -7, -9 Inhibitor Drug Screening Kit (Catalog #: K151-100, K153-100, K155-100/K157-100, K159-100 respectively, BioVision). Briefly, using instructions of the manufacturer, a wide range of different concentrations of the compound: 3333, 1000, 333, 100, 33, 10, 3, and 1 nM (final concentration) was added directly to the reaction mixtures containing the substrate and the enzyme in a final volume of 10 ul. After a 30-minute incubation at 37 C., the liberation of AFC was measured as an endpoint assay using the Flexstation3 (Molecular Devices) with an excitation wavelength of 400 nm and an emission wavelength of 505 nm. The level of inhibition of caspase-1, -3, -5, -7, -9 activity was determined by comparison.
Fluorometric Enzymatic Assay: Selectivity of compound 55, compound 63, compound 48, compound 57, compound 88 toward caspase-1 (pro-inflammatory group), caspase-5 (group I), caspase-9 (group II) and caspase-3 and caspase-7 (group III) was evaluated by using fluorometric methods using the Caspase-1, -3, -5, -7, -9 Inhibitor Drug Screening Kit (Catalog #: K151-100, K153-100, K155-100/K157-100, K159-100 respectively, BioVision). Briefly, using instructions of the manufacturer, a wide range of different concentrations of the compound: 3333, 1000, 333, 100, 33, 10, 3, and 1 nM (final concentration) was added directly to the reaction mixtures containing the substrate and the enzyme in a final volume of 10 ul. After a 30-minute incubation at 37 C., the liberation of AFC was measured as an endpoint assay using the Flexstation3 (Molecular Devices) with an excitation wavelength of 400 nm and an emission wavelength of 505 nm. The level of inhibition of caspase-1, -3, -5, -7, -9 activity was determined by comparison.
Fluorometric Enzymatic Assay: The inhibition of the activity of Caspase-1 to -10 by four different compounds (#53, #111, #123 & Z-DEVD-FMK used as a prodrug: z-D(OMe)E(OMe)VD(OMe)FMK (comparison control compound, SM Biochemicals LLC, Cat# SMFMK003)) and their respective IC50 values were determined using a fluorometric enzymatic assay (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25) and Caspase Fluorometric Substrate Set II Plus (BioVision, Cat# K137-9-25)) on a Flexstation 3x (Molecular Devices). In brief, each compound was serially diluted for a final test concentration range of 0.1 nM to 3.3 uM (10-point titration). Each active recombinant Caspase (Active Recombinant Caspase Set IV (BioVision, Cat# K233-10-25)) was added to the respective wells of the 96-well High Efficiency plates (Molecular Devices, Cat#75-000-0005), followed by the addition of the diluted test compounds. DMSO (Final=1%) or Z-VAD-FMK (Caspase-Family Inhibitor, Z-VAD-FMK (BioVision, Cat#1010-100).