PMID- 28186502 OWN - NLM STAT- MEDLINE DCOM- 20180129 LR - 20181113 IS - 1476-5403 (Electronic) IS - 1350-9047 (Print) IS - 1350-9047 (Linking) VI - 24 IP - 4 DP - 2017 Apr TI - STAT1 mediates transmembrane TNF-alpha-induced formation of death-inducing signaling complex and apoptotic signaling via TNFR1. PG - 660-671 LID - 10.1038/cdd.2016.162 [doi] AB - Tumor necrosis factor-alpha (TNF-alpha) exists in two forms: secretory TNF-alpha (sTNF-alpha) and transmembrane TNF-alpha (tmTNF-alpha). Although both forms of TNF-alpha induce tumor cell apoptosis, tmTNF-alpha is able to kill tumor cells that are resistant to sTNF-alpha-mediated cytotoxicity, indicating their differences in signal transduction. Here, we demonstrate that internalization of TNFR1 is crucial for sTNF-alpha- but not for tmTNF-alpha-induced apoptosis. sTNF-alpha induces binding of tumor necrosis factor receptor type 1-associated death domain protein (TRADD) to the death domain (DD) of TNFR1 and subsequent activation of nuclear factor kappa B (NF-kappaB), and the formation of death-inducing signaling complexes (DISCs) in the cytoplasm after internalization. In contrast, tmTNF-alpha induces DISC formation on the membrane in a DD-independent manner. It leads to the binding of signal transducer and activator of transcription 1 (STAT1) to a region spanning amino acids 319-337 of TNFR1 and induces phosphorylation of serine at 727 of STAT1. The phosphorylation of STAT1 promotes its binding to TRADD, and thus recruits Fas-associated protein with DD (FADD) and caspase 8 to form DISC complexes. This STAT1-dependent signaling results in apoptosis but not NF-kappaB activation. STAT1-deficiency in U3A cells counteracts tmTNF-alpha-induced DISC formation and apoptosis. Conversely, reconstitution of STAT1 expression restores tmTNF-alpha-induced apoptotic signaling in the cell line. Consistently, tmTNF-alpha suppresses the growth of STAT1-containing HT1080 tumors, but not of STAT1-deficient U3A tumors in vivo. Our data reveal an unappreciated molecular mechanism of tmTNF-alpha-induced apoptosis and may provide a new clue for cancer therapy. FAU - Jiang, Yaping AU - Jiang Y AD - Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China. FAU - Yu, Min AU - Yu M AD - Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China. AD - Department of General Surgery, Xinqiao Hospital, Third Military Medical University, Chongqing, PR China. FAU - Hu, Xuena AU - Hu X AD - Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China. FAU - Han, Lu AU - Han L AD - Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China. FAU - Yang, Kun AU - Yang K AD - Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China. FAU - Ba, Hongping AU - Ba H AD - Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China. FAU - Zhang, Zunyue AU - Zhang Z AD - Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China. FAU - Yin, Bingjiao AU - Yin B AD - Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China. FAU - Yang, Xiang-Ping AU - Yang XP AD - Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China. FAU - Li, Zhuoya AU - Li Z AD - Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China. FAU - Wang, Jing AU - Wang J AD - Department of Immunology, Basic Medical School, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20170210 PL - England TA - Cell Death Differ JT - Cell death and differentiation JID - 9437445 RN - 0 (Amino Acid Chloromethyl Ketones) RN - 0 (Death Domain Receptor Signaling Adaptor Proteins) RN - 0 (Fas-Associated Death Domain Protein) RN - 0 (NF-kappa B) RN - 0 (Receptors, Tumor Necrosis Factor, Type I) RN - 0 (STAT1 Transcription Factor) RN - 0 (TNF Receptor-Associated Death Domain Protein) RN - 0 (Tumor Necrosis Factor-alpha) RN - 0 (benzyloxycarbonylvalyl-alanyl-aspartyl fluoromethyl ketone) RN - EC 3.4.22.- (Caspase 8) RN - I9N81SC5HD (monodansylcadaverine) RN - L90BEN6OLL (Cadaverine) SB - IM MH - Amino Acid Chloromethyl Ketones/pharmacology MH - Animals MH - Apoptosis/drug effects MH - Cadaverine/analogs & derivatives/pharmacology MH - Caspase 8/metabolism MH - Cell Line MH - Death Domain Receptor Signaling Adaptor Proteins/*metabolism MH - Fas-Associated Death Domain Protein/antagonists & inhibitors/genetics/metabolism MH - HEK293 Cells MH - Humans MH - Mice MH - NF-kappa B/metabolism MH - NIH 3T3 Cells MH - Phosphorylation/drug effects MH - Protein Binding MH - Receptors, Tumor Necrosis Factor, Type I/antagonists & inhibitors/genetics/*metabolism MH - STAT1 Transcription Factor/genetics/*metabolism MH - Signal Transduction/drug effects MH - TNF Receptor-Associated Death Domain Protein/metabolism MH - Tumor Necrosis Factor-alpha/genetics/*metabolism/toxicity PMC - PMC5384023 COIS- The authors declare that they have no conflict of interest. EDAT- 2017/02/12 06:00 MHDA- 2018/01/30 06:00 PMCR- 2018/04/01 CRDT- 2017/02/11 06:00 PHST- 2016/06/10 00:00 [received] PHST- 2016/11/22 00:00 [revised] PHST- 2016/12/12 00:00 [accepted] PHST- 2017/02/12 06:00 [pubmed] PHST- 2018/01/30 06:00 [medline] PHST- 2017/02/11 06:00 [entrez] PHST- 2018/04/01 00:00 [pmc-release] AID - cdd2016162 [pii] AID - 10.1038/cdd.2016.162 [doi] PST - ppublish SO - Cell Death Differ. 2017 Apr;24(4):660-671. doi: 10.1038/cdd.2016.162. Epub 2017 Feb 10.