PMID- 29234328 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20191120 IS - 1664-3224 (Print) IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 8 DP - 2017 TI - Forward and Reverse Signaling Mediated by Transmembrane Tumor Necrosis Factor-Alpha and TNF Receptor 2: Potential Roles in an Immunosuppressive Tumor Microenvironment. PG - 1675 LID - 10.3389/fimmu.2017.01675 [doi] LID - 1675 AB - Tumor necrosis factor-alpha (TNF-alpha) is a pleiotropic inflammatory cytokine produced mainly by activated macrophages, lymphocytes and other cell types. Two distinct forms of TNF-alpha have been identified: soluble TNF-alpha (sTNF-alpha) and transmembrane TNF-alpha (mTNF-alpha). mTNF-alpha, which is the precursor of sTNF-alpha, can be cleaved by the TNF-alpha converting enzyme (TACE) and is released as sTNF-alpha. sTNF-alpha binds primarily to TNF receptor 1 (TNFR1) and plays an important role in the inflammatory immune response, whereas mTNF-alpha interacts primarily with TNF receptor 2 (TNFR2) and mediates the promotion of cellular proliferation and survival and other biological effects. It has been reported that the interaction between mTNF-alpha and TNFR2 induces bi-directional (forward and reverse) signaling in both mTNF-alpha- and TNFR2-expressing cells. Increasing evidence shows that the forward and reverse signaling mediated by mTNF-alpha and TNFR2 might play a significant role in the tumor microenvironment. In this review, the role of the crosstalk between mTNF-alpha and TNFR2 in the tumor microenvironment will be discussed. FAU - Qu, Yang AU - Qu Y AD - Department of Gastrointestinal Cancer Biology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China. AD - Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, China. AD - National Clinical Research Center for Cancer, Tianjin, China. FAU - Zhao, Gang AU - Zhao G AD - Department of Gastrointestinal Cancer Biology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China. AD - Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, China. AD - National Clinical Research Center for Cancer, Tianjin, China. FAU - Li, Hui AU - Li H AD - Department of Gastrointestinal Cancer Biology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China. AD - Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, China. AD - National Clinical Research Center for Cancer, Tianjin, China. LA - eng PT - Journal Article PT - Review DEP - 20171128 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 PMC - PMC5712345 OTO - NOTNLM OT - TNF receptor 2 OT - forward signaling OT - reverse signaling OT - transmembrane tumor necrosis factor-alpha OT - tumor microenvironment EDAT- 2017/12/14 06:00 MHDA- 2017/12/14 06:01 PMCR- 2017/01/01 CRDT- 2017/12/14 06:00 PHST- 2017/08/19 00:00 [received] PHST- 2017/11/14 00:00 [accepted] PHST- 2017/12/14 06:00 [entrez] PHST- 2017/12/14 06:00 [pubmed] PHST- 2017/12/14 06:01 [medline] PHST- 2017/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2017.01675 [doi] PST - epublish SO - Front Immunol. 2017 Nov 28;8:1675. doi: 10.3389/fimmu.2017.01675. eCollection 2017.