PMID- 18924132 OWN - NLM STAT- MEDLINE DCOM- 20090106 LR - 20211203 IS - 0014-2980 (Print) IS - 0014-2980 (Linking) VI - 38 IP - 11 DP - 2008 Nov TI - Mammalian target of rapamycin (mTOR) orchestrates the defense program of innate immune cells. PG - 2981-92 LID - 10.1002/eji.200838761 [doi] AB - The mammalian target of rapamycin (mTOR) can be viewed as cellular master complex scoring cellular vitality and stress. Whether mTOR controls also innate immune-defenses is currently unknown. Here we demonstrate that TLR activate mTOR via phosphoinositide 3-kinase/Akt. mTOR physically associates with the MyD88 scaffold protein to allow activation of interferon regulatory factor-5 and interferon regulatory factor-7, known as master transcription factors for pro-inflammatory cytokine- and type I IFN-genes. Unexpectedly, inactivation of mTOR did not prevent but increased lethality of endotoxin-mediated shock, which correlated with increased levels of IL-1beta. Mechanistically, mTOR suppresses caspase-1 activation, thus inhibits release of bioactive IL-1beta. We have identified mTOR as indispensable component of PRR signal pathways, which orchestrates the defense program of innate immune cells. FAU - Schmitz, Frank AU - Schmitz F AD - Institut fuer Medizinische Mikrobiologie, Immunologie und Hygiene, Technische Universitaet Muenchen, Muenchen, Germany. FAU - Heit, Antje AU - Heit A FAU - Dreher, Stefan AU - Dreher S FAU - Eisenacher, Katharina AU - Eisenacher K FAU - Mages, Jorg AU - Mages J FAU - Haas, Tobias AU - Haas T FAU - Krug, Anne AU - Krug A FAU - Janssen, Klaus-Peter AU - Janssen KP FAU - Kirschning, Carsten J AU - Kirschning CJ FAU - Wagner, Hermann AU - Wagner H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Germany TA - Eur J Immunol JT - European journal of immunology JID - 1273201 RN - 0 (Cytokines) RN - 0 (Interferon Regulatory Factor-7) RN - 0 (Interleukin-1beta) RN - 0 (Lipopolysaccharides) RN - 0 (Toll-Like Receptors) RN - EC 2.7.- (Protein Kinases) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.1.1 (mTOR protein, mouse) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - EC 3.4.22.36 (Caspase 1) SB - IM MH - Animals MH - Caspase 1/physiology MH - Cells, Cultured MH - Cytokines/biosynthesis MH - Female MH - Humans MH - *Immunity, Innate MH - Interferon Regulatory Factor-7/physiology MH - Interleukin-1beta/biosynthesis MH - Lipopolysaccharides/toxicity MH - Mice MH - Mice, Inbred C57BL MH - Protein Kinases/*physiology MH - Signal Transduction MH - TOR Serine-Threonine Kinases MH - Toll-Like Receptors/physiology MH - Transcription, Genetic EDAT- 2008/10/17 09:00 MHDA- 2009/01/07 09:00 CRDT- 2008/10/17 09:00 PHST- 2008/10/17 09:00 [pubmed] PHST- 2009/01/07 09:00 [medline] PHST- 2008/10/17 09:00 [entrez] AID - 10.1002/eji.200838761 [doi] PST - ppublish SO - Eur J Immunol. 2008 Nov;38(11):2981-92. doi: 10.1002/eji.200838761.