Adrenic Acid Metabolites as Endogenous Endothelium-Derived and Zona Glomerulosa-Derived Hyperpolarizing Factors

Adrenic acid (docosatetraenoic acid), an abundant fatty acid in the adrenal gland, is identical to arachidonic acid except for 2 additional carbons on the carboxyl end. Adrenic acid is metabolized by cyclooxygenases, cytochrome P450s, and lipoxygenases; however, little is known regarding the role of...

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Veröffentlicht in:Hypertension (Dallas, Tex. 1979) Tex. 1979), 2010-02, Vol.55 (2, Part 2 Suppl), p.547-554
Hauptverfasser: Kopf, Phillip G, Zhang, David X, Gauthier, Kathryn M, Nithipatikom, Kasem, Yi, Xiu-Yu, Falck, John R, Campbell, William B
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container_end_page 554
container_issue 2, Part 2 Suppl
container_start_page 547
container_title Hypertension (Dallas, Tex. 1979)
container_volume 55
creator Kopf, Phillip G
Zhang, David X
Gauthier, Kathryn M
Nithipatikom, Kasem
Yi, Xiu-Yu
Falck, John R
Campbell, William B
description Adrenic acid (docosatetraenoic acid), an abundant fatty acid in the adrenal gland, is identical to arachidonic acid except for 2 additional carbons on the carboxyl end. Adrenic acid is metabolized by cyclooxygenases, cytochrome P450s, and lipoxygenases; however, little is known regarding the role of adrenic acid and its metabolites in vascular tone. Because of its abundance in the adrenal gland, we investigated the role of adrenic acid in vascular tone of bovine adrenal cortical arteries and its metabolism by bovine adrenal zona glomerulosa cells. In adrenal cortical arteries, adrenic acid caused concentration-dependent relaxations, which were inhibited by the epoxyeicosatrienoic acid antagonist 14,15-epoxyeicosa-5(Z)-enoic acid and the cytochrome P450 inhibitor SKF-525A. The large-conductance calcium-activated potassium channel blocker iberiotoxin or removal of the endothelium abolished these relaxations. Reverse-phase high-pressure liquid chromatography and liquid chromatography/mass spectrometry isolated and identified numerous adrenic acid metabolites from zona glomerulosa cells, including dihomo-epoxyeicosatrienoic acids and dihomo-prostaglandins. In denuded adrenal cortical arteries, adrenic acid caused concentration-dependent relaxations in the presence of zona glomerulosa cells but not in their absence. These relaxations were inhibited by SKF-525A, 14,15-epoxyeicosa-5(Z)-enoic acid, and iberiotoxin. Dihomo-16,17-epoxyeicosatrienoic acid caused concentration-dependent relaxations of adrenal cortical arteries, which were inhibited by 14,15-epoxyeicosa-5(Z)-enoic acid and high potassium. Our results suggest that adrenic acid relaxations of bovine adrenal cortical arteries are mediated by endothelial and zona glomerulosa cell cytochrome P450 metabolites. Thus, adrenic acid metabolites could function as endogenous endothelium-derived and zona glomerulosa-derived hyperpolarizing factors in the adrenal cortex and contribute to the regulation of adrenal blood flow.
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Adrenic acid is metabolized by cyclooxygenases, cytochrome P450s, and lipoxygenases; however, little is known regarding the role of adrenic acid and its metabolites in vascular tone. Because of its abundance in the adrenal gland, we investigated the role of adrenic acid in vascular tone of bovine adrenal cortical arteries and its metabolism by bovine adrenal zona glomerulosa cells. In adrenal cortical arteries, adrenic acid caused concentration-dependent relaxations, which were inhibited by the epoxyeicosatrienoic acid antagonist 14,15-epoxyeicosa-5(Z)-enoic acid and the cytochrome P450 inhibitor SKF-525A. The large-conductance calcium-activated potassium channel blocker iberiotoxin or removal of the endothelium abolished these relaxations. Reverse-phase high-pressure liquid chromatography and liquid chromatography/mass spectrometry isolated and identified numerous adrenic acid metabolites from zona glomerulosa cells, including dihomo-epoxyeicosatrienoic acids and dihomo-prostaglandins. In denuded adrenal cortical arteries, adrenic acid caused concentration-dependent relaxations in the presence of zona glomerulosa cells but not in their absence. These relaxations were inhibited by SKF-525A, 14,15-epoxyeicosa-5(Z)-enoic acid, and iberiotoxin. Dihomo-16,17-epoxyeicosatrienoic acid caused concentration-dependent relaxations of adrenal cortical arteries, which were inhibited by 14,15-epoxyeicosa-5(Z)-enoic acid and high potassium. Our results suggest that adrenic acid relaxations of bovine adrenal cortical arteries are mediated by endothelial and zona glomerulosa cell cytochrome P450 metabolites. 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Vascular system ; Cardiovascular system ; Cattle ; Cells, Cultured ; Chromatography, High Pressure Liquid ; Cytochrome P-450 Enzyme System - metabolism ; Endothelium, Vascular - metabolism ; Erucic Acids - metabolism ; Erucic Acids - pharmacology ; Fatty Acids, Unsaturated ; Medical sciences ; Pharmacology. Drug treatments ; Potassium Channels, Calcium-Activated - pharmacology ; Proadifen - pharmacology ; Probability ; Vascular Resistance - drug effects ; Vascular Resistance - physiology ; Vasodilation - drug effects ; Vasodilation - physiology ; Vasodilator agents. 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Adrenic acid is metabolized by cyclooxygenases, cytochrome P450s, and lipoxygenases; however, little is known regarding the role of adrenic acid and its metabolites in vascular tone. Because of its abundance in the adrenal gland, we investigated the role of adrenic acid in vascular tone of bovine adrenal cortical arteries and its metabolism by bovine adrenal zona glomerulosa cells. In adrenal cortical arteries, adrenic acid caused concentration-dependent relaxations, which were inhibited by the epoxyeicosatrienoic acid antagonist 14,15-epoxyeicosa-5(Z)-enoic acid and the cytochrome P450 inhibitor SKF-525A. The large-conductance calcium-activated potassium channel blocker iberiotoxin or removal of the endothelium abolished these relaxations. Reverse-phase high-pressure liquid chromatography and liquid chromatography/mass spectrometry isolated and identified numerous adrenic acid metabolites from zona glomerulosa cells, including dihomo-epoxyeicosatrienoic acids and dihomo-prostaglandins. In denuded adrenal cortical arteries, adrenic acid caused concentration-dependent relaxations in the presence of zona glomerulosa cells but not in their absence. These relaxations were inhibited by SKF-525A, 14,15-epoxyeicosa-5(Z)-enoic acid, and iberiotoxin. Dihomo-16,17-epoxyeicosatrienoic acid caused concentration-dependent relaxations of adrenal cortical arteries, which were inhibited by 14,15-epoxyeicosa-5(Z)-enoic acid and high potassium. Our results suggest that adrenic acid relaxations of bovine adrenal cortical arteries are mediated by endothelial and zona glomerulosa cell cytochrome P450 metabolites. Thus, adrenic acid metabolites could function as endogenous endothelium-derived and zona glomerulosa-derived hyperpolarizing factors in the adrenal cortex and contribute to the regulation of adrenal blood flow.</description><subject>Adrenal Glands - blood supply</subject><subject>Adrenal Glands - metabolism</subject><subject>Analysis of Variance</subject><subject>Animals</subject><subject>Arterial hypertension. Arterial hypotension</subject><subject>Biological and medical sciences</subject><subject>Biological Factors - metabolism</subject><subject>Blood and lymphatic vessels</subject><subject>Cardiology. Vascular system</subject><subject>Cardiovascular system</subject><subject>Cattle</subject><subject>Cells, Cultured</subject><subject>Chromatography, High Pressure Liquid</subject><subject>Cytochrome P-450 Enzyme System - metabolism</subject><subject>Endothelium, Vascular - metabolism</subject><subject>Erucic Acids - metabolism</subject><subject>Erucic Acids - pharmacology</subject><subject>Fatty Acids, Unsaturated</subject><subject>Medical sciences</subject><subject>Pharmacology. Drug treatments</subject><subject>Potassium Channels, Calcium-Activated - pharmacology</subject><subject>Proadifen - pharmacology</subject><subject>Probability</subject><subject>Vascular Resistance - drug effects</subject><subject>Vascular Resistance - physiology</subject><subject>Vasodilation - drug effects</subject><subject>Vasodilation - physiology</subject><subject>Vasodilator agents. Cerebral vasodilators</subject><subject>Zona Glomerulosa - blood supply</subject><subject>Zona Glomerulosa - metabolism</subject><issn>0194-911X</issn><issn>1524-4563</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpdkNtuFDEMhiNERbeFV0AjJC5nSTKeQ7gblW23Ug8IigTcjLyJpxvITlbJDFV5-gZNKRK-sWV_v2X_jL0RfClEJd6tv31cfbpZXX0-v75q1-1ScLUUAALqZ2whSgk5lFXxnC24UJArIb4esqMYf3CeKKhfsEPJedHUpVww35pAg9VZq63JLmnEjXd2pJhhzFaD8bc0-Gkuxy05O-3yDxTsLzIZDib77gfMzpzfUZicj_g0XN_vKey9w2B_2-E2O0U9-hBfsoMeXaRXj_mYfTld3Zys84vrs_OT9iLXoIomV6qkXosKJNZ601ODABUUBghLaIQGrRVUvQGp6loipn9AbpqqkmCoN7o4Zu_nvTr4GAP13T7YHYb7TvDuj4vdfy6mvupmF5P49SzeT5sdmSfpX9sS8PYRwKjR9QEHbeM_TqZrpVKJg5m7826kEH-66Y5CtyV047bjKUBWTS654DwtF3nqiKZ4ALR3jnQ</recordid><startdate>201002</startdate><enddate>201002</enddate><creator>Kopf, Phillip G</creator><creator>Zhang, David X</creator><creator>Gauthier, Kathryn M</creator><creator>Nithipatikom, Kasem</creator><creator>Yi, Xiu-Yu</creator><creator>Falck, John R</creator><creator>Campbell, William B</creator><general>American Heart Association, Inc</general><general>Lippincott Williams &amp; Wilkins</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>201002</creationdate><title>Adrenic Acid Metabolites as Endogenous Endothelium-Derived and Zona Glomerulosa-Derived Hyperpolarizing Factors</title><author>Kopf, Phillip G ; Zhang, David X ; Gauthier, Kathryn M ; Nithipatikom, Kasem ; Yi, Xiu-Yu ; Falck, John R ; Campbell, William B</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4938-995efc1642a7cbfe8a44643d4ea5481c4cc946fd429772aa00342b86624defdc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Adrenal Glands - blood supply</topic><topic>Adrenal Glands - metabolism</topic><topic>Analysis of Variance</topic><topic>Animals</topic><topic>Arterial hypertension. Arterial hypotension</topic><topic>Biological and medical sciences</topic><topic>Biological Factors - metabolism</topic><topic>Blood and lymphatic vessels</topic><topic>Cardiology. Vascular system</topic><topic>Cardiovascular system</topic><topic>Cattle</topic><topic>Cells, Cultured</topic><topic>Chromatography, High Pressure Liquid</topic><topic>Cytochrome P-450 Enzyme System - metabolism</topic><topic>Endothelium, Vascular - metabolism</topic><topic>Erucic Acids - metabolism</topic><topic>Erucic Acids - pharmacology</topic><topic>Fatty Acids, Unsaturated</topic><topic>Medical sciences</topic><topic>Pharmacology. Drug treatments</topic><topic>Potassium Channels, Calcium-Activated - pharmacology</topic><topic>Proadifen - pharmacology</topic><topic>Probability</topic><topic>Vascular Resistance - drug effects</topic><topic>Vascular Resistance - physiology</topic><topic>Vasodilation - drug effects</topic><topic>Vasodilation - physiology</topic><topic>Vasodilator agents. 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Reverse-phase high-pressure liquid chromatography and liquid chromatography/mass spectrometry isolated and identified numerous adrenic acid metabolites from zona glomerulosa cells, including dihomo-epoxyeicosatrienoic acids and dihomo-prostaglandins. In denuded adrenal cortical arteries, adrenic acid caused concentration-dependent relaxations in the presence of zona glomerulosa cells but not in their absence. These relaxations were inhibited by SKF-525A, 14,15-epoxyeicosa-5(Z)-enoic acid, and iberiotoxin. Dihomo-16,17-epoxyeicosatrienoic acid caused concentration-dependent relaxations of adrenal cortical arteries, which were inhibited by 14,15-epoxyeicosa-5(Z)-enoic acid and high potassium. Our results suggest that adrenic acid relaxations of bovine adrenal cortical arteries are mediated by endothelial and zona glomerulosa cell cytochrome P450 metabolites. Thus, adrenic acid metabolites could function as endogenous endothelium-derived and zona glomerulosa-derived hyperpolarizing factors in the adrenal cortex and contribute to the regulation of adrenal blood flow.</abstract><cop>Hagerstown, MD</cop><pub>American Heart Association, Inc</pub><pmid>20038752</pmid><doi>10.1161/HYPERTENSIONAHA.109.144147</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record>
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source MEDLINE; American Heart Association Journals; Journals@Ovid Complete; EZB-FREE-00999 freely available EZB journals
subjects Adrenal Glands - blood supply
Adrenal Glands - metabolism
Analysis of Variance
Animals
Arterial hypertension. Arterial hypotension
Biological and medical sciences
Biological Factors - metabolism
Blood and lymphatic vessels
Cardiology. Vascular system
Cardiovascular system
Cattle
Cells, Cultured
Chromatography, High Pressure Liquid
Cytochrome P-450 Enzyme System - metabolism
Endothelium, Vascular - metabolism
Erucic Acids - metabolism
Erucic Acids - pharmacology
Fatty Acids, Unsaturated
Medical sciences
Pharmacology. Drug treatments
Potassium Channels, Calcium-Activated - pharmacology
Proadifen - pharmacology
Probability
Vascular Resistance - drug effects
Vascular Resistance - physiology
Vasodilation - drug effects
Vasodilation - physiology
Vasodilator agents. Cerebral vasodilators
Zona Glomerulosa - blood supply
Zona Glomerulosa - metabolism
title Adrenic Acid Metabolites as Endogenous Endothelium-Derived and Zona Glomerulosa-Derived Hyperpolarizing Factors
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