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Oncostatin M causes VEGF release from human airway smooth muscle: synergy with IL-1β

Oncostatin M causes VEGF release from human airway smooth muscle: synergy with IL-1β Vascular endothelial growth factor (VEGF), a potent angiogenesis factor, likely contributes to airway remodeling in asthma. We sought to examine the effects and mechanism of action of IL-6 family cytokines on VEGF release from human airway smooth muscle (HASM) cells. Oncostatin M (OSM), but not other IL-6 family cytokines, increased VEGF release, and IL-1 enhanced OSM-induced VEGF release. OSM increased VEGF mRNA expression and VEGF promoter activity, whereas IL-1 had no effect. IL-1 did not augment the effects of OSM on VEGF promoter activity but did augment OSM-induced VEGF mRNA expression and mRNA stability. The STAT3 inhibitor piceatannol decreased both OSM-induced VEGF release and synergy between OSM and IL-1 , without affecting responses to IL-1 alone. Piceatannol also inhibited OSM-induced VEGF mRNA expression. In contrast, inhibitors of MAPK pathway had no effect on OSM or OSM plus IL-1 -induced VEGF release. OSM increased type 1 IL-1 receptor (IL-1R1) mRNA expression, as measured by real-time PCR, and piceatannol attenuated this response. Consistent with the increase in IL-1R1 expression, OSM markedly augmented IL-1 -induced VEGF, MCP-1, and IL-6 release. In summary, our data indicate OSM causes VEGF expression in HASM cells by a transcriptional mechanism involving STAT3. IL-1 also synergizes with OSM to increase VEGF release, likely as a result of effects of IL-1 on VEGF mRNA stability as well as effects of OSM on IL-1R1 expression. This is the first description of a role for OSM on IL-1R1 expression in any cell type. OSM may contribute to airway remodeling observed in chronic airway disease. interleukin-6; interleukin-1 receptor 1; signal transducer and activator of transcription 3; monocyte chemoattractant protein-1; piceatannol; vascular endothelial growth factor Address for reprint requests and other correspondence: S. Shore, Physiology Program, Harvard School of Public Health, 665 Huntington Ave., Boston, MA 02115 (E-mail: sshore@hsph.harvard.edu ) http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png AJP - Lung Cellular and Molecular Physiology The American Physiological Society

Oncostatin M causes VEGF release from human airway smooth muscle: synergy with IL-1β

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Publisher
The American Physiological Society
Copyright
Copyright © 2011 the American Physiological Society
ISSN
1040-0605
eISSN
1522-1504
DOI
10.1152/ajplung.00333.2004
pmid
15665043
Publisher site
See Article on Publisher Site

Abstract

Vascular endothelial growth factor (VEGF), a potent angiogenesis factor, likely contributes to airway remodeling in asthma. We sought to examine the effects and mechanism of action of IL-6 family cytokines on VEGF release from human airway smooth muscle (HASM) cells. Oncostatin M (OSM), but not other IL-6 family cytokines, increased VEGF release, and IL-1 enhanced OSM-induced VEGF release. OSM increased VEGF mRNA expression and VEGF promoter activity, whereas IL-1 had no effect. IL-1 did not augment the effects of OSM on VEGF promoter activity but did augment OSM-induced VEGF mRNA expression and mRNA stability. The STAT3 inhibitor piceatannol decreased both OSM-induced VEGF release and synergy between OSM and IL-1 , without affecting responses to IL-1 alone. Piceatannol also inhibited OSM-induced VEGF mRNA expression. In contrast, inhibitors of MAPK pathway had no effect on OSM or OSM plus IL-1 -induced VEGF release. OSM increased type 1 IL-1 receptor (IL-1R1) mRNA expression, as measured by real-time PCR, and piceatannol attenuated this response. Consistent with the increase in IL-1R1 expression, OSM markedly augmented IL-1 -induced VEGF, MCP-1, and IL-6 release. In summary, our data indicate OSM causes VEGF expression in HASM cells by a transcriptional mechanism involving STAT3. IL-1 also synergizes with OSM to increase VEGF release, likely as a result of effects of IL-1 on VEGF mRNA stability as well as effects of OSM on IL-1R1 expression. This is the first description of a role for OSM on IL-1R1 expression in any cell type. OSM may contribute to airway remodeling observed in chronic airway disease. interleukin-6; interleukin-1 receptor 1; signal transducer and activator of transcription 3; monocyte chemoattractant protein-1; piceatannol; vascular endothelial growth factor Address for reprint requests and other correspondence: S. Shore, Physiology Program, Harvard School of Public Health, 665 Huntington Ave., Boston, MA 02115 (E-mail: sshore@hsph.harvard.edu )

Journal

AJP - Lung Cellular and Molecular Physiology – The American Physiological Society

Published: Jun 1, 2005

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