University of Hertfordshire

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Nitric oxide-dependent vasodilation is compromised in isolated pulmonary arteries from COX knockout mice. / Wright, Will; MacKenzie, Louise Susan; Kirkby, N.S.; Mitchell, Jane A.

In: FASEB Journal, Vol. 27, lb603, 04.2013.

Research output: Contribution to journalMeeting abstract

Harvard

Wright, W, MacKenzie, LS, Kirkby, NS & Mitchell, JA 2013, 'Nitric oxide-dependent vasodilation is compromised in isolated pulmonary arteries from COX knockout mice', FASEB Journal, vol. 27, lb603.

APA

Wright, W., MacKenzie, L. S., Kirkby, N. S., & Mitchell, J. A. (2013). Nitric oxide-dependent vasodilation is compromised in isolated pulmonary arteries from COX knockout mice. FASEB Journal, 27, [lb603].

Vancouver

Author

Wright, Will ; MacKenzie, Louise Susan ; Kirkby, N.S. ; Mitchell, Jane A. / Nitric oxide-dependent vasodilation is compromised in isolated pulmonary arteries from COX knockout mice. In: FASEB Journal. 2013 ; Vol. 27.

Bibtex

@article{a4d0f115bc7347c385559fec00fcf8ca,
title = "Nitric oxide-dependent vasodilation is compromised in isolated pulmonary arteries from COX knockout mice",
abstract = "Cyclooxygenase (COX) has two isoforms and is essential for prostanoid synthesis. COX-1 is constitutive whilst COX-2 is induced in inflammation. Two COX products, prostacyclin (PGI2) and thromboxane (TxA2), regulate vessel tone; PGI2 mediates vasodilation and platelet inhibition, and TxA2 opposes this. PGI2 therapies are used in pulmonary arterial hypertension (PAH). Endogenous TxA2/PGI2 has been linked to PAH in animal models, but the mechanism and isoform involved is debated. We hypothesized that pulmonary artery (PA) from COX-1–/– and COX-2–/– mice would have altered vasodilatory function compared with wild-type (WT; C57Bl6) mice. Vasomotor responses to contractile and relaxant agents were measured by myography. PA from all mice responded similarly to contraction by high potassium or the TxA2 mimetic, U46619. Relaxation to PGI2 receptor or PPARβ/ agonists was also similar in all PAs. However, COX-1–/– and, to a lesser extent, COX-2–/– PA had impaired vasodilation to acetylcholine (ACh), which stimulates endothelial nitric oxide (NO) release, and COX-1–/– PA also dilated less to sodium nitroprusside (SNP); an NO donor that works on smooth muscle (Fig 1). These data indicate an interaction between COX and NO sensing pathways in pulmonary vessels, and have implications for our understanding of PAH. ",
author = "Will Wright and MacKenzie, {Louise Susan} and N.S. Kirkby and Mitchell, {Jane A.}",
year = "2013",
month = apr,
language = "English",
volume = "27",
journal = "FASEB Journal",
issn = "0892-6638",
publisher = "FASEB",

}

RIS

TY - JOUR

T1 - Nitric oxide-dependent vasodilation is compromised in isolated pulmonary arteries from COX knockout mice

AU - Wright, Will

AU - MacKenzie, Louise Susan

AU - Kirkby, N.S.

AU - Mitchell, Jane A.

PY - 2013/4

Y1 - 2013/4

N2 - Cyclooxygenase (COX) has two isoforms and is essential for prostanoid synthesis. COX-1 is constitutive whilst COX-2 is induced in inflammation. Two COX products, prostacyclin (PGI2) and thromboxane (TxA2), regulate vessel tone; PGI2 mediates vasodilation and platelet inhibition, and TxA2 opposes this. PGI2 therapies are used in pulmonary arterial hypertension (PAH). Endogenous TxA2/PGI2 has been linked to PAH in animal models, but the mechanism and isoform involved is debated. We hypothesized that pulmonary artery (PA) from COX-1–/– and COX-2–/– mice would have altered vasodilatory function compared with wild-type (WT; C57Bl6) mice. Vasomotor responses to contractile and relaxant agents were measured by myography. PA from all mice responded similarly to contraction by high potassium or the TxA2 mimetic, U46619. Relaxation to PGI2 receptor or PPARβ/ agonists was also similar in all PAs. However, COX-1–/– and, to a lesser extent, COX-2–/– PA had impaired vasodilation to acetylcholine (ACh), which stimulates endothelial nitric oxide (NO) release, and COX-1–/– PA also dilated less to sodium nitroprusside (SNP); an NO donor that works on smooth muscle (Fig 1). These data indicate an interaction between COX and NO sensing pathways in pulmonary vessels, and have implications for our understanding of PAH.

AB - Cyclooxygenase (COX) has two isoforms and is essential for prostanoid synthesis. COX-1 is constitutive whilst COX-2 is induced in inflammation. Two COX products, prostacyclin (PGI2) and thromboxane (TxA2), regulate vessel tone; PGI2 mediates vasodilation and platelet inhibition, and TxA2 opposes this. PGI2 therapies are used in pulmonary arterial hypertension (PAH). Endogenous TxA2/PGI2 has been linked to PAH in animal models, but the mechanism and isoform involved is debated. We hypothesized that pulmonary artery (PA) from COX-1–/– and COX-2–/– mice would have altered vasodilatory function compared with wild-type (WT; C57Bl6) mice. Vasomotor responses to contractile and relaxant agents were measured by myography. PA from all mice responded similarly to contraction by high potassium or the TxA2 mimetic, U46619. Relaxation to PGI2 receptor or PPARβ/ agonists was also similar in all PAs. However, COX-1–/– and, to a lesser extent, COX-2–/– PA had impaired vasodilation to acetylcholine (ACh), which stimulates endothelial nitric oxide (NO) release, and COX-1–/– PA also dilated less to sodium nitroprusside (SNP); an NO donor that works on smooth muscle (Fig 1). These data indicate an interaction between COX and NO sensing pathways in pulmonary vessels, and have implications for our understanding of PAH.

M3 - Meeting abstract

VL - 27

JO - FASEB Journal

JF - FASEB Journal

SN - 0892-6638

M1 - lb603

ER -