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    A single nucleotide polymorphism in the CYP4F2 but not CYP4A11 gene is associated with increased 20-HETE excretion and blood pressure

    Access Status
    Open access via publisher
    Authors
    Ward, Natalie
    Tsai, I.
    Barden, A.
    Van Bockxmeer, F.
    Puddey, I.
    Hodgson, J.
    Croft, K.
    Date
    2008
    Type
    Journal Article
    
    Metadata
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    Citation
    Ward, N. and Tsai, I. and Barden, A. and Van Bockxmeer, F. and Puddey, I. and Hodgson, J. and Croft, K. 2008. A single nucleotide polymorphism in the CYP4F2 but not CYP4A11 gene is associated with increased 20-HETE excretion and blood pressure. Hypertension. 51 (5): pp. 1393-1398.
    Source Title
    Hypertension
    DOI
    10.1161/HYPERTENSIONAHA.107.104463
    ISSN
    0194-911X
    School
    School of Biomedical Sciences
    URI
    http://hdl.handle.net/20.500.11937/37067
    Collection
    • Curtin Research Publications
    Abstract

    Arachidonic acid is a major fatty acid that can be metabolized by the cytochrome P450 enzyme to a number of bioactive eicosanoids. A major metabolite of this oxidation is 20-hydroxyeicosatetraenoic acid, which acts as a potent vasoconstrictor. However, in the kidney, its vasoconstrictor actions can be offset by its natriuretic properties. A guanine-to-adenine polymorphism in the CYP4F2 gene was associated with a reduction in 20-hydroxyeicosatetraenoic acid production in vitro. A thymidine-to-cytosine polymorphism in the CYP4A11 gene reduced catalytic activity by >50% in vitro and was associated with hypertension. The aim was to determine whether these 2 mutations are associated with urinary 20-hydroxyeicosatetraenoic acid excretion and blood pressure in humans. For the CYP4F2, 51% were homozygous for the G allele, 40% were carriers, and 9% were homozygous for the A allele. For CYP4A11, 72% were homozygous for the T allele, 25% were carriers, and 3% were homozygous for the C allele. The CYP4F2 GA/AA genotype was significantly associated with an increase in both 20-hydroxyeicosatetraenoic acid excretion and systolic blood pressure. The CYP4A11 CC/TC genotype was significantly associated with a reduction in 20-hydroxyeicosatetraenoic acid excretion but was not associated with blood pressure. We have demonstrated for the first time in humans that polymorphisms of the CYP4F2 and CYP4A11 genes have opposite effects on 20- hydroxyeicosatetraenoic acid excretion. The positive association between the CYP4F2 GA/AA genotype and both systolic blood pressure and 20- hydroxyeicosatetraenoic acid excretion strengthens a role for 20-hydroxyeicosatetraenoic acid in the modulation of blood pressure. © 2008 American Heart Association, Inc.

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