Only in Titles

Search results for: Caspase 2 Substrate VDVAD AFC

paperclip

#20405221   // To Up

The execution phase of autophagy associated PCD during insect metamorphosis.

D
Caroline O B Facey, Richard A Lockshin

2663 related Products with: The execution phase of autophagy associated PCD during insect metamorphosis.

5500 Units10 ug1x10e7 cells101100 IU

Related Pathways

    No related Items
paperclip

#11078888   // To Up

Mechanism of nitric oxide-induced apoptosis in human neuroblastoma SH-SY5Y cells.

We have attempted to elucidate the precise mechanism of nitric oxide (NO)-induced apoptotic neuronal cell death. Enzymatic cleavages of DEVD-AFC, VDVAD-AFC, and LEHD-AFC (specific substrates for caspase-3-like protease (caspase-3 and -7), caspase-2, and caspase-9, respectively) were observed by treatment with NO. Western blot analysis showed that pro-forms of caspase-2, -3, -6, and -7 are decreased during apoptosis. Interestingly, Ac-DEVD-CHO, a caspase-3-like protease inhibitor, blocked not only the decreases in caspase-2 and -7, but also the formation of p17 from p20 in caspase-3 induced by NO, suggesting that caspase-3 exists upstream of caspase-2 and -7. Bongkrekic acid, a potent inhibitor of mitochondrial permeability transition, specifically blocked both the loss of mitochondrial membrane potential and subsequent DNA fragmentation in response to NO. Thus, NO results in neuronal apoptosis through the sequential loss of mitochondrial membrane potential, caspase activation, and degradation of inhibitor of caspase-activated DNase (CAD) (CAD activation).
R Moriya, T Uehara, Y Nomura

1685 related Products with: Mechanism of nitric oxide-induced apoptosis in human neuroblastoma SH-SY5Y cells.

1 mg1.00 flask10 ug1.00 flask4 Membranes/Box5ug96tests50 ul 100ul100 1.00 flask4 Arrays/Slide

Related Pathways

paperclip

#10590315   // To Up

Possible involvement of cytochrome c release and sequential activation of caspases in ceramide-induced apoptosis in SK-N-MC cells.

Ceramide is characterized as a second messenger of apoptosis induced by various agents such as tumor necrosis factor (TNF-alpha), Fas ligand, hydrogen peroxide, heat shock and ionizing radiation. In this study, we investigated the mechanism of ceramide-induced apoptosis using a human neuroblastoma cell line, SK-N-MC. N-Acetyl-sphingosine (C2-ceramide), a cell-permeable ceramide analogue, was able to induce apoptosis in SK-N-MC cells as estimated by DNA fragmentation and chromatin condensation. C2-ceramide-induced DNA fragmentation was blocked by caspase inhibitor (Z-Asp-CH(2)-DCB). An increase in caspase-3 (CPP32)-like protease activity was evident during C2-ceramide-induced apoptosis, suggesting that caspases are involved in this apoptosis. Moreover, enzymatic cleavage of VDVAD-AFC and LEHD-AFC (specific substrates for caspase-2 and -9, respectively) was increased by treatment with C2-ceramide. To elucidate which types of caspase are activated in C2-ceramide-treated cells, we performed Western blot analysis using antibodies against each isoform. Both proforms of caspase-2 and -3 were decreased in response to C2-ceramide in a time-dependent manner. Mitochondrial cytochrome c is also time-dependently released into the cytosol in response to treatment with C2-ceramide. Addition of cytochrome c into the S-100 fractions prepared from SK-N-MC cells could activate caspase-2 in cell-free systems. These results suggest the possibility that cytochrome c released to the cytosol can activate caspases (caspase-9, -3, and -2) during C2-ceramide-induced apoptosis of SK-N-MC cells.
A Ito, T Uehara, A Tokumitsu, Y Okuma, Y Nomura

2383 related Products with: Possible involvement of cytochrome c release and sequential activation of caspases in ceramide-induced apoptosis in SK-N-MC cells.

100ug100ug1 Set1 mg4 Membranes/Box50 ul1x10e7 cells100 µg1.00 flask4 Arrays/Slide

Related Pathways