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- W1991497223 abstract "Selenium deficiency causes oxidative stress and impairs steroidogenesis in vitro. Leptin is closely related to the hypothalamo-pituitary-adrenal (HPA) axis. Leptin inhibits the HPA axis at the central level while corticosteroids have been shown to stimulate leptin secretion in most studies. We hypothesized that oxidative stress impairs adrenal steroidogenesis and decreases leptin production in vivo. The goal of this study was to investigate in rats the effects of selenium deficiency and oxidative stress on adrenal function and on leptin concentrations. Weanling rats were fed a selenium-deficient (Se-) or selenium-sufficient (Se+) diet for 4–10 weeks. Selenium deficiency caused a marked decrease in liver (≥ 99%) and adrenal (≥ 81%) glutathione peroxidase (GPx) activities. Selenium deficiency did not affect basal and short-term adrenocorticotropin (ACTH) stimulated corticosterone or leptin concentrations. In contrast, after long-term ACTH stimulation, selenium deficiency caused a doubling in adrenal isoprostane content and blunted the increase in corticosterone and leptin concentrations observed in Se+ animals. Plasma leptin concentrations were 50% lower in Se- compared to Se+ animals following long-term ACTH. Our results suggest that oxidative stress causes a decrease in circulating corticosterone in response to ACTH, and, as a consequence, a decrease in plasma leptin concentrations." @default.
- W1991497223 created "2016-06-24" @default.
- W1991497223 creator A5039693167 @default.
- W1991497223 creator A5060964519 @default.
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- W1991497223 date "2004-01-01" @default.
- W1991497223 modified "2023-10-17" @default.
- W1991497223 title "Selenium deficiency impairs corticosterone and leptin responses to adrenocorticotropin in the rat" @default.
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- W1991497223 doi "https://doi.org/10.1002/biof.5520200205" @default.
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