| Urinary 20-hydroxyeicosatetraenoic acid excretion is associated with oxidative stress in hypertensive subjects. | |
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MedLine Citation:
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PMID: 15780761 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Oxidative stress has been implicated in the pathogenesis of hypertension. 20-Hydroxyeicosatetraenoic acid (20-HETE) is a cytochrome P450 product of arachidonic acid metabolism, thought to be involved in the regulation of blood pressure (BP). The metabolism of arachidonic acid by cytochrome P450 enzymes may be a significant source of oxidative stress. F2-isoprostanes are reliable markers of in vivo oxidative damage. gamma-Glutamyl transpeptidase (gamma-GT) has traditionally been associated with alcohol intake or liver dysfunction and may be an early marker of oxidative stress. The objective of the present study was to investigate relationships between 20-HETE excretion and markers of oxidative stress (F2-isoprostanes and gamma-GT). Sixty-nine treated hypertensive subjects underwent measurement of 24-h ambulatory BP, serum gamma-GT, and urinary F2-isoprostane and 20-HETE excretion. 20-HETE excretion was positively associated with 24-h diastolic BP (p = 0.005), alcohol intake (p = 0.008), gamma-GT (p = 0.007), and F2-isoprostanes (p = 0.005). F2-isoprostanes were positively associated with alcohol intake (p = 0.018) and gamma-GT (p = 0.01). In a multivariate regression, gamma-GT remained an independent predictor of 20-HETE excretion, after adjustment for age, gender, BMI, and alcohol intake. In conclusion, the study highlights the positive association observed between 20-HETE excretion and markers of oxidative damage. The study also provides evidence that gamma-GT may be a useful marker of oxidative stress. |
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Authors:
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Natalie C Ward; Ian B Puddey; Jonathan M Hodgson; Lawrence J Beilin; Kevin D Croft |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Free radical biology & medicine Volume: 38 ISSN: 0891-5849 ISO Abbreviation: Free Radic. Biol. Med. Publication Date: 2005 Apr |
Date Detail:
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Created Date: 2005-03-22 Completed Date: 2005-09-26 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8709159 Medline TA: Free Radic Biol Med Country: United States |
Other Details:
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Languages: eng Pagination: 1032-6 Citation Subset: IM |
Affiliation:
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School of Medicine and Pharmachology, University of Western Ausralia, Perth, Australia. nward@cyllene.uwa.edu.au |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Humans Hydroxyeicosatetraenoic Acids / urine* Hypertension / metabolism* Middle Aged Oxidative Stress |
| Chemical | |
Reg. No./Substance:
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0/Hydroxyeicosatetraenoic Acids; 79551-86-3/20-hydroxy-5,8,11,14-eicosatetraenoic acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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