PMID- 22119392 OWN - NLM STAT- MEDLINE DCOM- 20120723 LR - 20120319 IS - 1879-2472 (Electronic) IS - 0049-3848 (Linking) VI - 129 IP - 4 DP - 2012 Apr TI - BMP-2 inhibits TF expression in human monocytes by shutting down MAPK signaling and AP-1 transcriptional activity. PG - e106-11 LID - 10.1016/j.thromres.2011.10.024 [doi] AB - BACKGROUND: We have recently identified bone morphogenetic protein (BMP)-2 as a novel inhibitor of tissue factor (TF) expression in lipopolysaccharide (LPS)-activated human monocytes, and now sought for intracellular mechanisms. METHODS: Here, we studied activation status of mitogen activated protein kinases (MAPKs) extracellular signal-regulated protein kinase (Erk) 1/2, p38, and c-Jun N-terminal kinase (JNK) as well as transcription factors activator protein (AP)-1 and nuclear factor kappa B (NF-kB), which regulate inducible expression of TF. RESULTS: Human mononuclear cells (MNCs) responded to BMP-2 stimulation with activation of canonic Smad1/5/8 signaling. Pretreatment with BMP-2 prevented LPS-induced increase in surface presentation, intracellular accumulation, and fraction of TF-positive MNCs. Similarly, LPS-induced increase in levels of phosphorylated Erk1/2, p38, and JNK was markedly diminished by BMP-2 pretreatment. BMP-2 pretreatment prior to LPS significantly diminished LPS-induced transcriptional activation of AP-1-dependent reporter. In contrast, BMP-2 given prior to LPS did not dampen the transcriptional activation of NF-kB-sensitive luciferase reporter. CONCLUSIONS: BMP-2 can inhibit LPS-induced TF protein expression and surface presentation in human MNCs by downregulation of Erk1/2, p38, and JNK signaling, as well as reduced transcriptional activity of AP-1, but not NF-kB. CI - Copyright (c) 2011 Elsevier Ltd. All rights reserved. FAU - Egorina, E M AU - Egorina EM AD - Hematological Research Group, Faculty of Health Sciences, University of Tromso, 9037, Tromso, Norway. FAU - Sovershaev, T A AU - Sovershaev TA FAU - Hansen, J B AU - Hansen JB FAU - Sovershaev, M A AU - Sovershaev MA LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20111125 PL - United States TA - Thromb Res JT - Thrombosis research JID - 0326377 RN - 0 (BMP2 protein, human) RN - 0 (Bone Morphogenetic Protein 2) RN - 0 (NF-kappa B) RN - 0 (Transcription Factor AP-1) RN - 9035-58-9 (Thromboplastin) SB - IM MH - Bone Morphogenetic Protein 2/*pharmacokinetics MH - Cells, Cultured MH - Down-Regulation/drug effects MH - Humans MH - MAP Kinase Signaling System/drug effects/*physiology MH - Monocytes/*metabolism MH - NF-kappa B/*metabolism MH - Thromboplastin/*metabolism MH - Transcription Factor AP-1/*metabolism MH - Transcriptional Activation/drug effects/*physiology EDAT- 2011/11/29 06:00 MHDA- 2012/07/24 06:00 CRDT- 2011/11/29 06:00 PHST- 2011/07/26 00:00 [received] PHST- 2011/10/11 00:00 [revised] PHST- 2011/10/24 00:00 [accepted] PHST- 2011/11/29 06:00 [entrez] PHST- 2011/11/29 06:00 [pubmed] PHST- 2012/07/24 06:00 [medline] AID - S0049-3848(11)00564-0 [pii] AID - 10.1016/j.thromres.2011.10.024 [doi] PST - ppublish SO - Thromb Res. 2012 Apr;129(4):e106-11. doi: 10.1016/j.thromres.2011.10.024. Epub 2011 Nov 25.