| Arachidonic acid diols produced by cytochrome P-450 monooxygenases are incorporated into phospholipids of vascular endothelial cells. | |
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MedLine Citation:
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PMID: 8662855 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Epoxyeicosatrienoic acids (EETs) are synthesized by cytochrome P-450 monooxygenases and released into the blood. When taken up by vascular endothelial and smooth muscle cells, the EETs are primarily esterified to phospholipids or converted to dihydroxyeicosatetraenoic acids (DHETs) and released. In the present studies, radiolabeled 8,9-, 11,12-, and 14,15-DHETs released into the medium from vascular smooth muscle cells were isolated and incubated for 4-16 h with cultured bovine aortic endothelial cells. The uptake ranged from 2 to 50% for the three regioisomers. Hydrolysis of the endothelial lipids and gas chromatographic-mass spectral analyses of the products indicated that all three DHET regioisomers were incorporated intact into phosphatidylcholine and phosphatidylinositol. Similar incubations with EETs confirmed that small amounts of DHETs were also esterified to endothelial phospholipids. These studies indicate that DHETs are incorporated into phospholipids either at the time of EET conversion to DHET or upon release and re-uptake of DHETs. Beside demonstrating for the first time that fatty acid diols are incorporated intact into endothelial lipids, these studies raise the possibility that both EETs and DHETs remain long enough in the vascular wall to produce chronic vasoactive effects. |
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Authors:
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M VanRollins; T L Kaduce; X Fang; H R Knapp; A A Spector |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: The Journal of biological chemistry Volume: 271 ISSN: 0021-9258 ISO Abbreviation: J. Biol. Chem. Publication Date: 1996 Jun |
Date Detail:
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Created Date: 1996-08-20 Completed Date: 1996-08-20 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 2985121R Medline TA: J Biol Chem Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 14001-9 Citation Subset: IM |
Affiliation:
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Department of Internal Medicine, University of Iowa College of Medicine, Iowa City, Iowa 52242, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Aorta Arachidonic Acids / metabolism* Cattle Cells, Cultured Chromatography, High Pressure Liquid Cytochrome P-450 Enzyme System / metabolism* Endothelium, Vascular / metabolism* Kinetics Mass Spectrometry Models, Biological Phospholipids / metabolism* |
| Grant Support | |
ID/Acronym/Agency:
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HL-48877/HL/NHLBI NIH HHS; HL-49264/HL/NHLBI NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Arachidonic Acids; 0/Phospholipids; 9035-51-2/Cytochrome P-450 Enzyme System |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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