PMID- 9830064 OWN - NLM STAT- MEDLINE DCOM- 19990108 LR - 20210209 IS - 0021-9258 (Print) IS - 0021-9258 (Linking) VI - 273 IP - 49 DP - 1998 Dec 4 TI - TRAIL/Apo2L activates c-Jun NH2-terminal kinase (JNK) via caspase-dependent and caspase-independent pathways. PG - 33091-8 AB - In this study we show that TRAIL (tumor necrosis factor-related apoptosis-inducing ligand), also called Apo2L, activates the c-Jun N-terminal kinase (JNK). Interestingly, TRAIL-induced JNK activation occurs in a cell type-specific manner. In HeLa cells, TRAIL-induced JNK activation can be completely blocked with the cysteine protease inhibitor zVAD-fmk, whereas the same inhibitor has no, or even a stimulatory, effect on JNK activation in Kym-1 cells. Hence, TRAIL can engage at least two independent pathways leading to JNK activation, one that is cysteine protease-dependent and one that is cysteine protease-independent. To investigate whether the cysteine protease-dependent signaling of TRAIL leading to JNK activation is related to the apoptotic pathway engaged by this ligand, we investigated HeLa cells stably overexpressing a dominant negative mutant of FADD (Fas-associating protein with death domain) (GFP(green fluorescent protein)DeltaFADD). In these cells, TRAIL-induced cell death and activation of the apoptosis executioner caspase-8 (FLICE/MACH) and caspase-3 (YAMA, CPP-32, Apopain), that belong to caspase subfamily of cysteine proteases, were abrogated, whereas JNK activation remained unaffected and was still sensitive toward z-VAD-fmk. Similar data were found in HeLa cells overexpressing Apo1/Fas and GFPDeltaFADD upon stimulation with agonistic antibodies. These data suggest that cross-linking of the TRAIL receptors and Apo1/Fas, respectively, engages a FADD-dependent pathway leading to the activation of apoptotic caspases and, in parallel, a FADD-independent pathway leading to the stimulation of one or more cysteine proteases capable to activate JNK but not sufficient for the induction of cell death. FAU - Muhlenbeck, F AU - Muhlenbeck F AD - Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany. FAU - Haas, E AU - Haas E FAU - Schwenzer, R AU - Schwenzer R FAU - Schubert, G AU - Schubert G FAU - Grell, M AU - Grell M FAU - Smith, C AU - Smith C FAU - Scheurich, P AU - Scheurich P FAU - Wajant, H AU - Wajant H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Biol Chem JT - The Journal of biological chemistry JID - 2985121R RN - 0 (Apoptosis Regulatory Proteins) RN - 0 (DNA Primers) RN - 0 (Membrane Glycoproteins) RN - 0 (TNF-Related Apoptosis-Inducing Ligand) RN - 0 (TNFSF10 protein, human) RN - 0 (Tumor Necrosis Factor-alpha) RN - EC 2.7.11.17 (Calcium-Calmodulin-Dependent Protein Kinases) RN - EC 2.7.11.24 (JNK Mitogen-Activated Protein Kinases) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinases) RN - EC 3.4.22.- (CASP3 protein, human) RN - EC 3.4.22.- (Caspase 3) RN - EC 3.4.22.- (Caspases) SB - IM MH - Apoptosis Regulatory Proteins MH - Base Sequence MH - Calcium-Calmodulin-Dependent Protein Kinases/*metabolism MH - Caspase 3 MH - Caspases/*metabolism MH - Cell Line MH - DNA Primers MH - Enzyme Activation MH - HeLa Cells MH - Humans MH - JNK Mitogen-Activated Protein Kinases MH - Membrane Glycoproteins/*metabolism MH - *Mitogen-Activated Protein Kinases MH - TNF-Related Apoptosis-Inducing Ligand MH - Tumor Necrosis Factor-alpha/*metabolism EDAT- 1998/11/26 00:00 MHDA- 1998/11/26 00:01 CRDT- 1998/11/26 00:00 PHST- 1998/11/26 00:00 [pubmed] PHST- 1998/11/26 00:01 [medline] PHST- 1998/11/26 00:00 [entrez] AID - S0021-9258(19)58987-6 [pii] AID - 10.1074/jbc.273.49.33091 [doi] PST - ppublish SO - J Biol Chem. 1998 Dec 4;273(49):33091-8. doi: 10.1074/jbc.273.49.33091.