CREB-mediated IL-6 expression is required for 15(S)-hydroxyeicosatetraenoic acid-induced vascular smooth muscle cell migration

Koteswara R. Chava, Manjula Karpurapu, Dong Wang, Manjula Bhanoori, Venkatesh Kundumani-Sridharan, Qiuhua Zhang, Toshihiro Ichiki, Wayne C. Glasgow, Rao Gadiparthi

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Abstract

OBJECTIVE-: Migration of vascular smooth muscle cells (VSMCs) from media to intima is a key event in the pathophysiology of atherosclerosis and restenosis. The lipoxygenase products of polyunsaturated fatty acids (PUFA) were shown to play a role in these diseases. cAMP response element binding protein (CREB) has been implicated in the regulation of VSMC growth and motility in response to thrombin and angiotensin II. The aim of the present study was to test the role of CREB in an oxidized lipid molecule, 15(S)-HETE-induced VSMC migration and neointima formation. METHODS AND RESULTS-: 15(S)-HETE stimulated VSMC migration in CREB-dependent manner, as measured by the modified Boyden chamber method. Blockade of MEK1, JNK1, or p38MAPK inhibited 15(S)-HETE-induced CREB phosphorylation and VSMC migration. 15(S)-HETE induced expression and secretion of interleukin-6 (IL-6), as analyzed by RT-PCR and ELISA, respectively. Neutralizing anti-IL-6 antibodies blocked 15(S)-HETE-induced VSMC migration. Dominant-negative mutant-mediated blockade of ERK1/2, JNK1, p38MAPK, or CREB suppressed 15(S)-HETE-induced IL-6 expression in VSMCs. Serial 5′ deletions and site-directed mutagenesis of IL-6 promoter along with chromatin immunoprecipitation using anti-CREB antibodies showed that cAMP response element is essential for 15(S)-HETE-induced IL-6 expression. Dominant-negative CREB also suppressed balloon injury-induced IL-6 expression, SMC migration from media to intimal region, and neointima formation. Adenovirus-mediated transduction of 15-lipoxygenase 2 (15-LOX2) caused increased production of 15-HETE in VSMCs and enhanced IL-6 expression, SMC migration from media to intimal region, and neointima formation in response to arterial injury. CONCLUSIONS-: The above results suggest a role for 15-LOX2-15-HETE in the regulation of VSMC migration and neointima formation involving CREB-mediated IL-6 expression.

Original languageEnglish (US)
Pages (from-to)809-815
Number of pages7
JournalArteriosclerosis, thrombosis, and vascular biology
Volume29
Issue number6
DOIs
StatePublished - Jun 1 2009

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Hydroxyeicosatetraenoic Acids
Cyclic AMP Response Element-Binding Protein
Vascular Smooth Muscle
Smooth Muscle Myocytes
Cell Movement
Interleukin-6
Neointima
Lipoxygenase
Arachidonate 15-Lipoxygenase
Tunica Intima
15-hydroxy-5,8,11,13-eicosatetraenoic acid
Antibodies
Chromatin Immunoprecipitation
Wounds and Injuries
Response Elements
Site-Directed Mutagenesis
Unsaturated Fatty Acids
Adenoviridae
Thrombin
Angiotensin II

All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine

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CREB-mediated IL-6 expression is required for 15(S)-hydroxyeicosatetraenoic acid-induced vascular smooth muscle cell migration. / Chava, Koteswara R.; Karpurapu, Manjula; Wang, Dong; Bhanoori, Manjula; Kundumani-Sridharan, Venkatesh; Zhang, Qiuhua; Ichiki, Toshihiro; Glasgow, Wayne C.; Gadiparthi, Rao.

In: Arteriosclerosis, thrombosis, and vascular biology, Vol. 29, No. 6, 01.06.2009, p. 809-815.

Research output: Contribution to journalArticle

Chava, Koteswara R. ; Karpurapu, Manjula ; Wang, Dong ; Bhanoori, Manjula ; Kundumani-Sridharan, Venkatesh ; Zhang, Qiuhua ; Ichiki, Toshihiro ; Glasgow, Wayne C. ; Gadiparthi, Rao. / CREB-mediated IL-6 expression is required for 15(S)-hydroxyeicosatetraenoic acid-induced vascular smooth muscle cell migration. In: Arteriosclerosis, thrombosis, and vascular biology. 2009 ; Vol. 29, No. 6. pp. 809-815.
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abstract = "OBJECTIVE-: Migration of vascular smooth muscle cells (VSMCs) from media to intima is a key event in the pathophysiology of atherosclerosis and restenosis. The lipoxygenase products of polyunsaturated fatty acids (PUFA) were shown to play a role in these diseases. cAMP response element binding protein (CREB) has been implicated in the regulation of VSMC growth and motility in response to thrombin and angiotensin II. The aim of the present study was to test the role of CREB in an oxidized lipid molecule, 15(S)-HETE-induced VSMC migration and neointima formation. METHODS AND RESULTS-: 15(S)-HETE stimulated VSMC migration in CREB-dependent manner, as measured by the modified Boyden chamber method. Blockade of MEK1, JNK1, or p38MAPK inhibited 15(S)-HETE-induced CREB phosphorylation and VSMC migration. 15(S)-HETE induced expression and secretion of interleukin-6 (IL-6), as analyzed by RT-PCR and ELISA, respectively. Neutralizing anti-IL-6 antibodies blocked 15(S)-HETE-induced VSMC migration. Dominant-negative mutant-mediated blockade of ERK1/2, JNK1, p38MAPK, or CREB suppressed 15(S)-HETE-induced IL-6 expression in VSMCs. Serial 5′ deletions and site-directed mutagenesis of IL-6 promoter along with chromatin immunoprecipitation using anti-CREB antibodies showed that cAMP response element is essential for 15(S)-HETE-induced IL-6 expression. Dominant-negative CREB also suppressed balloon injury-induced IL-6 expression, SMC migration from media to intimal region, and neointima formation. Adenovirus-mediated transduction of 15-lipoxygenase 2 (15-LOX2) caused increased production of 15-HETE in VSMCs and enhanced IL-6 expression, SMC migration from media to intimal region, and neointima formation in response to arterial injury. CONCLUSIONS-: The above results suggest a role for 15-LOX2-15-HETE in the regulation of VSMC migration and neointima formation involving CREB-mediated IL-6 expression.",
author = "Chava, {Koteswara R.} and Manjula Karpurapu and Dong Wang and Manjula Bhanoori and Venkatesh Kundumani-Sridharan and Qiuhua Zhang and Toshihiro Ichiki and Glasgow, {Wayne C.} and Rao Gadiparthi",
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AU - Chava, Koteswara R.

AU - Karpurapu, Manjula

AU - Wang, Dong

AU - Bhanoori, Manjula

AU - Kundumani-Sridharan, Venkatesh

AU - Zhang, Qiuhua

AU - Ichiki, Toshihiro

AU - Glasgow, Wayne C.

AU - Gadiparthi, Rao

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N2 - OBJECTIVE-: Migration of vascular smooth muscle cells (VSMCs) from media to intima is a key event in the pathophysiology of atherosclerosis and restenosis. The lipoxygenase products of polyunsaturated fatty acids (PUFA) were shown to play a role in these diseases. cAMP response element binding protein (CREB) has been implicated in the regulation of VSMC growth and motility in response to thrombin and angiotensin II. The aim of the present study was to test the role of CREB in an oxidized lipid molecule, 15(S)-HETE-induced VSMC migration and neointima formation. METHODS AND RESULTS-: 15(S)-HETE stimulated VSMC migration in CREB-dependent manner, as measured by the modified Boyden chamber method. Blockade of MEK1, JNK1, or p38MAPK inhibited 15(S)-HETE-induced CREB phosphorylation and VSMC migration. 15(S)-HETE induced expression and secretion of interleukin-6 (IL-6), as analyzed by RT-PCR and ELISA, respectively. Neutralizing anti-IL-6 antibodies blocked 15(S)-HETE-induced VSMC migration. Dominant-negative mutant-mediated blockade of ERK1/2, JNK1, p38MAPK, or CREB suppressed 15(S)-HETE-induced IL-6 expression in VSMCs. Serial 5′ deletions and site-directed mutagenesis of IL-6 promoter along with chromatin immunoprecipitation using anti-CREB antibodies showed that cAMP response element is essential for 15(S)-HETE-induced IL-6 expression. Dominant-negative CREB also suppressed balloon injury-induced IL-6 expression, SMC migration from media to intimal region, and neointima formation. Adenovirus-mediated transduction of 15-lipoxygenase 2 (15-LOX2) caused increased production of 15-HETE in VSMCs and enhanced IL-6 expression, SMC migration from media to intimal region, and neointima formation in response to arterial injury. CONCLUSIONS-: The above results suggest a role for 15-LOX2-15-HETE in the regulation of VSMC migration and neointima formation involving CREB-mediated IL-6 expression.

AB - OBJECTIVE-: Migration of vascular smooth muscle cells (VSMCs) from media to intima is a key event in the pathophysiology of atherosclerosis and restenosis. The lipoxygenase products of polyunsaturated fatty acids (PUFA) were shown to play a role in these diseases. cAMP response element binding protein (CREB) has been implicated in the regulation of VSMC growth and motility in response to thrombin and angiotensin II. The aim of the present study was to test the role of CREB in an oxidized lipid molecule, 15(S)-HETE-induced VSMC migration and neointima formation. METHODS AND RESULTS-: 15(S)-HETE stimulated VSMC migration in CREB-dependent manner, as measured by the modified Boyden chamber method. Blockade of MEK1, JNK1, or p38MAPK inhibited 15(S)-HETE-induced CREB phosphorylation and VSMC migration. 15(S)-HETE induced expression and secretion of interleukin-6 (IL-6), as analyzed by RT-PCR and ELISA, respectively. Neutralizing anti-IL-6 antibodies blocked 15(S)-HETE-induced VSMC migration. Dominant-negative mutant-mediated blockade of ERK1/2, JNK1, p38MAPK, or CREB suppressed 15(S)-HETE-induced IL-6 expression in VSMCs. Serial 5′ deletions and site-directed mutagenesis of IL-6 promoter along with chromatin immunoprecipitation using anti-CREB antibodies showed that cAMP response element is essential for 15(S)-HETE-induced IL-6 expression. Dominant-negative CREB also suppressed balloon injury-induced IL-6 expression, SMC migration from media to intimal region, and neointima formation. Adenovirus-mediated transduction of 15-lipoxygenase 2 (15-LOX2) caused increased production of 15-HETE in VSMCs and enhanced IL-6 expression, SMC migration from media to intimal region, and neointima formation in response to arterial injury. CONCLUSIONS-: The above results suggest a role for 15-LOX2-15-HETE in the regulation of VSMC migration and neointima formation involving CREB-mediated IL-6 expression.

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