Pharmacological stimulation of hypoxia inducible factor-1α facilitates the corticosterone response to a mild acute stressor

•Interactions between HIF1α and the HPA axis may facilitate the stress response.•HIF stimulation via DMOG enhances the corticosterone response to mild stress.•HIF stimulation alters expression of glucocorticoid co-chaperones after stress.•FKBP4 and FKBP5 may mediate crosstalk between the HIF pathway...

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Veröffentlicht in:Neuroscience letters 2015-07, Vol.600, p.75-79
Hauptverfasser: Harrell, Constance S., Rowson, Sydney A., Neigh, Gretchen N.
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Rowson, Sydney A.
Neigh, Gretchen N.
description •Interactions between HIF1α and the HPA axis may facilitate the stress response.•HIF stimulation via DMOG enhances the corticosterone response to mild stress.•HIF stimulation alters expression of glucocorticoid co-chaperones after stress.•FKBP4 and FKBP5 may mediate crosstalk between the HIF pathway and the HPA axis. While both glucocorticoids (the principal output of the hypothalamic–pituitary–adrenal axis) and oxidative stress have been implicated in outcomes due to an excessive or prolonged stress response, the precise mechanisms linking these two systems remain poorly elucidated. One potential mediator between the hypothalamic–pituitary–adrenal axis and oxidative stress is the hypoxia inducible factor-1 (HIF-1) pathway. HIF-1 is an oxygen-responsive transcription factor with diverse effects including changes in cellular metabolism. The experiments in this manuscript sought to determine if pharmacological stimulation of HIF-1α via administration of dimethyloxalylglycine (DMOG) would facilitate the corticosterone response to a mild acute stressor. DMOG administration significantly increased plasma corticosterone 5min after an acute airpuff without changing baseline plasma corticosterone or plasma corticosterone level two hours post-startle. DMOG administration also reduced hippocampal gene expression of the pro-translocation co-chaperone for the glucocorticoid receptor, FKBP4, two hours after airpuff startle. At this same two-hour time point, hippocampal expression of FKBP5, an anti-translocation co-chaperone of the glucocorticoid receptor, in the DMOG-treated group was also positively correlated with plasma corticosterone levels. These data indicate that there is significant crosstalk between the hypothalamic–pituitary-axis and the HIF-1 pathway and extend the current knowledge of glucocorticoid and hypoxia interactions in an ethologically relevant stress model.
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subjects Airpuff startle
Amino Acids, Dicarboxylic - pharmacology
Animals
Corticosterone - blood
Dimethyloxalylglycine
FKBP4
FKBP5
Hippocampus - metabolism
Hypoxia inducible factor 1α
Hypoxia-Inducible Factor 1, alpha Subunit - metabolism
Male
Rats, Wistar
Receptors, Glucocorticoid - genetics
Receptors, Glucocorticoid - metabolism
Stress
Stress, Psychological - metabolism
Tacrolimus Binding Proteins - genetics
Tacrolimus Binding Proteins - metabolism
title Pharmacological stimulation of hypoxia inducible factor-1α facilitates the corticosterone response to a mild acute stressor
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