PMID- 22695613 OWN - NLM STAT- MEDLINE DCOM- 20130723 LR - 20211021 IS - 2041-4889 (Electronic) VI - 3 IP - 6 DP - 2012 Jun 14 TI - A novel role for RIP1 kinase in mediating TNFalpha production. PG - e320 LID - 10.1038/cddis.2012.64 [doi] AB - Receptor-interacting protein 1 (RIP1) is a Ser/Thr kinase with both kinase-dependent and kinase-independent roles in death receptor signaling. The kinase activity of RIP1 is required for necroptosis, a caspase-independent pathway of programmed cell death. In some cell types, the inhibition of caspases leads to autocrine production of TNFalpha, which then activates necroptosis. Here, we describe a novel role for RIP1 kinase in regulating TNFalpha production after caspase inhibition. Caspase inhibitors activate RIP1 kinase and another protein, EDD, to mediate JNK signaling, which stimulates Sp1-dependent transcription of TNFalpha. This pathway is independent of nuclear factor kappaB and also occurs after Smac mimetic/IAP antagonist treatment or the loss of TNF receptor-associated factor 2 (Traf2). These findings implicate cIAP1/2 and Traf2 as negative regulators of this RIP1 kinase-dependent TNFalpha production pathway and suggest a novel role for RIP1 kinase in mediating TNFalpha production under certain conditions. FAU - Christofferson, D E AU - Christofferson DE AD - Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA. FAU - Li, Y AU - Li Y FAU - Hitomi, J AU - Hitomi J FAU - Zhou, W AU - Zhou W FAU - Upperman, C AU - Upperman C FAU - Zhu, H AU - Zhu H FAU - Gerber, S A AU - Gerber SA FAU - Gygi, S AU - Gygi S FAU - Yuan, J AU - Yuan J LA - eng GR - R37 AG012859/AG/NIA NIH HHS/United States GR - R37-012859/PHS HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20120614 PL - England TA - Cell Death Dis JT - Cell death & disease JID - 101524092 RN - 0 (Caspase Inhibitors) RN - 0 (GTPase-Activating Proteins) RN - 0 (Ralbp1 protein, mouse) RN - 0 (TNF Receptor-Associated Factor 2) RN - 0 (Tumor Necrosis Factor-alpha) RN - EC 2.3.2.26 (UBR5 protein, mouse) RN - EC 2.3.2.27 (Ubiquitin-Protein Ligases) RN - EC 3.4.22.- (Caspases) SB - IM MH - Animals MH - Apoptosis MH - Caspase Inhibitors/pharmacology MH - Caspases/metabolism MH - Cell Line MH - GTPase-Activating Proteins/*metabolism MH - Mice MH - Signal Transduction MH - TNF Receptor-Associated Factor 2/metabolism MH - Tumor Necrosis Factor-alpha/*biosynthesis MH - Ubiquitin-Protein Ligases/metabolism PMC - PMC3388236 EDAT- 2012/06/15 06:00 MHDA- 2013/07/24 06:00 PMCR- 2012/06/01 CRDT- 2012/06/15 06:00 PHST- 2012/06/15 06:00 [entrez] PHST- 2012/06/15 06:00 [pubmed] PHST- 2013/07/24 06:00 [medline] PHST- 2012/06/01 00:00 [pmc-release] AID - cddis201264 [pii] AID - 10.1038/cddis.2012.64 [doi] PST - epublish SO - Cell Death Dis. 2012 Jun 14;3(6):e320. doi: 10.1038/cddis.2012.64.