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- W2186552922 abstract "We examined whether renal 20-hydroxyeicosatetraenoic acid (20-HETE) synthesis is altered during gestation. Renal microsomal arachidonic acid omega-hydroxylase activity increased by 50 and 48% in rats on days 12 and 19 of gestation, respectively. Renal microvessel 20-HETE synthesis increased by 50 and 82% in rats on days 6 and 12 of gestation, respectively, and returned to control levels at day 19 of gestation. In contrast, 20-HETE synthesis in isolated medullary thick ascending limb was unchanged from control levels on days 6 and 12 of gestation, but it increased twofold on day 19 of gestation. This increase on day 19 of gestation was associated with a twofold increase in urinary 20-HETE excretion, and it coincided with a 23-mmHg fall in blood pressure. Moreover, change in the rate of 20-HETE synthesis in microvessels was consistent with the level of expression of cytochrome P450 (CYP)4A proteins. Administration of the CYP4A inhibitor 1-aminobenzotriazole (ABT) for 2 days on day 12 of pregnancy or for 5 days starting on day 15 of pregnancy caused a transient but significant reduction in systolic blood pressure. ABT treatment also decreased urinary sodium, urinary 20-HETE, and renal and microvessel 20-HETE synthesis. This study, to our knowledge, is the first to demonstrate that 20-HETE synthesis in the kidney is altered in time- and site-specific manners during pregnancy. The localized pattern of changes suggests that there are distinct regulatory mechanisms for 20-HETE synthesis in the kidney during pregnancy." @default.
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- W2186552922 date "2002-02-01" @default.
- W2186552922 modified "2023-09-28" @default.
- W2186552922 title "Renal 20-hydroxyeicosatetraenoic acid synthesis during pregnancy" @default.
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- W2186552922 doi "https://doi.org/10.1152/ajpregu.2002.282.2.r383" @default.
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