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Bone morphogenetic protein 9 (BMP9) and BMP10 enhance tumor necrosis factor-α-induced monocyte recruitment to the vascular endothelium mainly via activin receptor-like kinase 2

Bone morphogenetic proteins 9 and 10 (BMP9/BMP10) are circulating cytokines with important roles in endothelial homeostasis. The aim of this study was to investigate the roles of BMP9 and BMP10 in mediating monocyte–endothelial interactions using an in vitro flow adhesion assay. Herein, we report th...

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Published in:The Journal of biological chemistry 2017-08, Vol.292 (33), p.13714-13726
Main Authors: Mitrofan, Claudia-Gabriela, Appleby, Sarah L., Nash, Gerard B., Mallat, Ziad, Chilvers, Edwin R., Upton, Paul D., Morrell, Nicholas W.
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cited_by cdi_FETCH-LOGICAL-c419t-e3debad5de10f04281fc953636951a5d78ed1fc52589152bdfcc81be06f87a9a3
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container_title The Journal of biological chemistry
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creator Mitrofan, Claudia-Gabriela
Appleby, Sarah L.
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Upton, Paul D.
Morrell, Nicholas W.
description Bone morphogenetic proteins 9 and 10 (BMP9/BMP10) are circulating cytokines with important roles in endothelial homeostasis. The aim of this study was to investigate the roles of BMP9 and BMP10 in mediating monocyte–endothelial interactions using an in vitro flow adhesion assay. Herein, we report that whereas BMP9/BMP10 alone had no effect on monocyte recruitment, at higher concentrations both cytokines synergized with tumor necrosis factor-α (TNFα) to increase recruitment to the vascular endothelium. The BMP9/BMP10-mediated increase in monocyte recruitment in the presence of TNFα was associated with up-regulated expression levels of E-selectin, vascular cell adhesion molecule (VCAM-1), and intercellular adhesion molecule 1 (ICAM-1) on endothelial cells. Using siRNAs to type I and II BMP receptors and the signaling intermediaries (Smads), we demonstrated a key role for ALK2 in the BMP9/BMP10-induced surface expression of E-selectin, and both ALK1 and ALK2 in the up-regulation of VCAM-1 and ICAM-1. The type II receptors, BMPR-II and ACTR-IIA were both required for this response, as was Smad1/5. The up-regulation of cell surface adhesion molecules by BMP9/10 in the presence of TNFα was inhibited by LDN193189, which inhibits ALK2 but not ALK1. Furthermore, LDN193189 inhibited monocyte recruitment induced by TNFα and BMP9/10. BMP9/10 increased basal IκBα protein expression, but did not alter p65/RelA levels. Our findings suggest that higher concentrations of BMP9/BMP10 synergize with TNFα to induce the up-regulation of endothelial selectins and adhesion molecules, ultimately resulting in increased monocyte recruitment to the vascular endothelium. This process is mediated mainly via the ALK2 type I receptor, BMPR-II/ACTR-IIA type II receptors, and downstream Smad1/5 signaling.
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The aim of this study was to investigate the roles of BMP9 and BMP10 in mediating monocyte–endothelial interactions using an in vitro flow adhesion assay. Herein, we report that whereas BMP9/BMP10 alone had no effect on monocyte recruitment, at higher concentrations both cytokines synergized with tumor necrosis factor-α (TNFα) to increase recruitment to the vascular endothelium. The BMP9/BMP10-mediated increase in monocyte recruitment in the presence of TNFα was associated with up-regulated expression levels of E-selectin, vascular cell adhesion molecule (VCAM-1), and intercellular adhesion molecule 1 (ICAM-1) on endothelial cells. Using siRNAs to type I and II BMP receptors and the signaling intermediaries (Smads), we demonstrated a key role for ALK2 in the BMP9/BMP10-induced surface expression of E-selectin, and both ALK1 and ALK2 in the up-regulation of VCAM-1 and ICAM-1. The type II receptors, BMPR-II and ACTR-IIA were both required for this response, as was Smad1/5. The up-regulation of cell surface adhesion molecules by BMP9/10 in the presence of TNFα was inhibited by LDN193189, which inhibits ALK2 but not ALK1. Furthermore, LDN193189 inhibited monocyte recruitment induced by TNFα and BMP9/10. BMP9/10 increased basal IκBα protein expression, but did not alter p65/RelA levels. Our findings suggest that higher concentrations of BMP9/BMP10 synergize with TNFα to induce the up-regulation of endothelial selectins and adhesion molecules, ultimately resulting in increased monocyte recruitment to the vascular endothelium. 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The aim of this study was to investigate the roles of BMP9 and BMP10 in mediating monocyte–endothelial interactions using an in vitro flow adhesion assay. Herein, we report that whereas BMP9/BMP10 alone had no effect on monocyte recruitment, at higher concentrations both cytokines synergized with tumor necrosis factor-α (TNFα) to increase recruitment to the vascular endothelium. The BMP9/BMP10-mediated increase in monocyte recruitment in the presence of TNFα was associated with up-regulated expression levels of E-selectin, vascular cell adhesion molecule (VCAM-1), and intercellular adhesion molecule 1 (ICAM-1) on endothelial cells. Using siRNAs to type I and II BMP receptors and the signaling intermediaries (Smads), we demonstrated a key role for ALK2 in the BMP9/BMP10-induced surface expression of E-selectin, and both ALK1 and ALK2 in the up-regulation of VCAM-1 and ICAM-1. The type II receptors, BMPR-II and ACTR-IIA were both required for this response, as was Smad1/5. The up-regulation of cell surface adhesion molecules by BMP9/10 in the presence of TNFα was inhibited by LDN193189, which inhibits ALK2 but not ALK1. Furthermore, LDN193189 inhibited monocyte recruitment induced by TNFα and BMP9/10. BMP9/10 increased basal IκBα protein expression, but did not alter p65/RelA levels. Our findings suggest that higher concentrations of BMP9/BMP10 synergize with TNFα to induce the up-regulation of endothelial selectins and adhesion molecules, ultimately resulting in increased monocyte recruitment to the vascular endothelium. This process is mediated mainly via the ALK2 type I receptor, BMPR-II/ACTR-IIA type II receptors, and downstream Smad1/5 signaling.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>28646109</pmid><doi>10.1074/jbc.M117.778506</doi><tpages>13</tpages><oa>free_for_read</oa></addata></record>
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subjects Activin Receptors, Type I - antagonists & inhibitors
Activin Receptors, Type I - genetics
Activin Receptors, Type I - metabolism
Activin Receptors, Type II - antagonists & inhibitors
Activin Receptors, Type II - genetics
Activin Receptors, Type II - metabolism
Aorta
atherosclerosis
bone morphogenetic protein (BMP)
Bone Morphogenetic Proteins - metabolism
Cell Adhesion - drug effects
Cell Biology
Cells, Cultured
E-Selectin - chemistry
E-Selectin - genetics
E-Selectin - metabolism
endothelial cell
Endothelium, Vascular - cytology
Endothelium, Vascular - drug effects
Endothelium, Vascular - immunology
Endothelium, Vascular - metabolism
Growth Differentiation Factor 2
Growth Differentiation Factors - metabolism
Humans
Intercellular Adhesion Molecule-1 - chemistry
Intercellular Adhesion Molecule-1 - genetics
Intercellular Adhesion Molecule-1 - metabolism
Kinetics
monocyte
Monocytes - cytology
Monocytes - drug effects
Monocytes - immunology
Monocytes - metabolism
Phosphorylation - drug effects
Protein Kinase Inhibitors - pharmacology
Protein Processing, Post-Translational - drug effects
Pyrazoles - pharmacology
Pyrimidines - pharmacology
RNA Interference
Signal Transduction - drug effects
SMAD transcription factor
Tumor Necrosis Factor-alpha - agonists
Tumor Necrosis Factor-alpha - metabolism
Up-Regulation - drug effects
Vascular Cell Adhesion Molecule-1 - chemistry
Vascular Cell Adhesion Molecule-1 - genetics
Vascular Cell Adhesion Molecule-1 - metabolism
title Bone morphogenetic protein 9 (BMP9) and BMP10 enhance tumor necrosis factor-α-induced monocyte recruitment to the vascular endothelium mainly via activin receptor-like kinase 2
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