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- W2912653314 abstract "Recently, in addition to the paraventricular nucleus (PVN), the nucleus of the hippocampal commissure (NHpC) have been proposed to regulate stress in birds due to the discovery of corticotropin releasing hormone (CRH) neurons in the NHpC. Expression of CRH, CRHR1, CRHR2 and glucocorticoid receptors (GRs) were determined within the NHpC compared to the PVN. Additionally, two levels of the hypothalamo-pituitary-adrenal (HPA) axis: 1) anterior pituitary and 2) adrenal gland were examined following food deprivation (FD) stress including proopiomelanocortin (POMC) expression and plasma corticosterone (CORT), respectively. CRH expression in the NHpC increased rapidly, however it quickly returned to control levels, showing a negative feedback with CRHR1. In contrast, CRH expression in the PVN and its receptor CRHR1, steadily increased throughout the sampling period showing a positive feedback with CRH. Of interest, brain-derived neurotrophic factor (BDNF) mRNA was significantly elevated in the PVN, while no significant change in BDNF mRNA was observed in the NHpC. The rapid increase in BDNF expression that matched the pattern shown by CRHR1 in the PVN may play a role in the positive feedback of CRH and its receptor. GRs were downregulated in both the NHpC and PVN throughout the study. POMC hnRNA and mRNA were significantly elevated from 1 to 4 h of FD compared to controls. A significant increase in plasma CORT levels occurred at 2 h and persisted to the end of the experiment, suggesting that CRH neurons in the NHpC initiated, while PVN CRH neurons sustained the early response of the HPA axis to stress." @default.
- W2912653314 created "2019-02-21" @default.
- W2912653314 creator A5011725686 @default.
- W2912653314 creator A5062490580 @default.
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- W2912653314 date "2019-07-01" @default.
- W2912653314 modified "2023-10-18" @default.
- W2912653314 title "Differential and temporal expression of corticotropin releasing hormone and its receptors in the nucleus of the hippocampal commissure and paraventricular nucleus during the stress response in chickens (Gallus gallus)" @default.
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- W2912653314 doi "https://doi.org/10.1016/j.brainres.2019.02.018" @default.
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