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A Central Role for Nicotinic Cholinergic Regulation of Growth Factor–Induced Endothelial Cell Migration

A Central Role for Nicotinic Cholinergic Regulation of Growth Factor–Induced Endothelial... A Central Role for Nicotinic Cholinergic Regulation of Growth Factor–Induced Endothelial Cell Migration Martin K.C. Ng, Jenny Wu, Edwin Chang, Bing-yin Wang, Regina Katzenberg-Clark, Akiko Ishii-Watabe, John P. Cooke Objective—An endothelial nicotinic acetylcholine receptor (nAChR) participates in atherogenesis and tumorigenesis by promoting neovascularization. To date, the mechanisms of nAChR-mediated angiogenesis and their relationship to angiogenic factors, eg, VEGF and bFGF, are unknown. Methods and Results—Nicotine induced dose-dependent human microvascular endothelial cell (HMVEC) migration, a key angiogenesis event, to an extent which was equivalent in magnitude to bFGF (10 ng/mL) but less than for VEGF (10 ng/mL). Unexpectedly, nAChR antagonism not only abolished nicotine-induced HMVEC migration but also abolished migration induced by bFGF and attenuated migration induced by VEGF. Transcriptional profiling identified gene expression programs which were concordantly regulated by all 3 angiogens (nicotine, VEGF, and bFGF), a notable feature of which includes corepression of thioredoxin-interacting protein (TXNIP), endogenous inhibitor of the redox regulator thioredoxin. Furthermore, TXNIP repression by all 3 angiogens induced thioredoxin activity. Silencing thioredoxin by small interference RNA abrogated all angiogen-induced migration while silencing TXNIP strongly induced HMVEC migration. Interestingly, nAChR antagonism abrogates growth factor (VEGF and bFGF)–mediated induction of thioredoxin activity. Conclusions—Nicotine promotes angiogenesis via stimulation http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arteriosclerosis, Thrombosis, and Vascular Biology Wolters Kluwer Health

A Central Role for Nicotinic Cholinergic Regulation of Growth Factor–Induced Endothelial Cell Migration

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References (34)

ISSN
1079-5642
eISSN
1524-4636
DOI
10.1161/01.ATV.0000251517.98396.4a
pmid
17082486
Publisher site
See Article on Publisher Site

Abstract

A Central Role for Nicotinic Cholinergic Regulation of Growth Factor–Induced Endothelial Cell Migration Martin K.C. Ng, Jenny Wu, Edwin Chang, Bing-yin Wang, Regina Katzenberg-Clark, Akiko Ishii-Watabe, John P. Cooke Objective—An endothelial nicotinic acetylcholine receptor (nAChR) participates in atherogenesis and tumorigenesis by promoting neovascularization. To date, the mechanisms of nAChR-mediated angiogenesis and their relationship to angiogenic factors, eg, VEGF and bFGF, are unknown. Methods and Results—Nicotine induced dose-dependent human microvascular endothelial cell (HMVEC) migration, a key angiogenesis event, to an extent which was equivalent in magnitude to bFGF (10 ng/mL) but less than for VEGF (10 ng/mL). Unexpectedly, nAChR antagonism not only abolished nicotine-induced HMVEC migration but also abolished migration induced by bFGF and attenuated migration induced by VEGF. Transcriptional profiling identified gene expression programs which were concordantly regulated by all 3 angiogens (nicotine, VEGF, and bFGF), a notable feature of which includes corepression of thioredoxin-interacting protein (TXNIP), endogenous inhibitor of the redox regulator thioredoxin. Furthermore, TXNIP repression by all 3 angiogens induced thioredoxin activity. Silencing thioredoxin by small interference RNA abrogated all angiogen-induced migration while silencing TXNIP strongly induced HMVEC migration. Interestingly, nAChR antagonism abrogates growth factor (VEGF and bFGF)–mediated induction of thioredoxin activity. Conclusions—Nicotine promotes angiogenesis via stimulation

Journal

Arteriosclerosis, Thrombosis, and Vascular BiologyWolters Kluwer Health

Published: Jan 1, 2007

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