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Ablation of glucocorticoid receptor in the hindbrain of the mouse provides a novel model to investigate stress disorders

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  • Anne-Louise Gannon
  • Laura O'Hara
  • J Ian Mason
  • Diane Rebourcet
  • Sarah Smith
  • Adriana Traveres
  • Carlos Jose Alcaide-Corral
  • Hanne Frederiksen
  • Anne Jørgensen
  • Laura Milne
  • Rod T Mitchell
  • Lee B Smith
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The hypothalamic-pituitary-adrenal (HPA) axis regulates responses to internal and external stressors. Many patients diagnosed with conditions such as depression or anxiety also have hyperactivity of the HPA axis. Hyper-stimulation of the HPA axis results in sustained elevated levels of glucocorticoids which impair neuronal function and can ultimately result in a psychiatric disorder. Studies investigating Glucocorticoid Receptor (GR/NR3C1) in the brain have primarily focused on the forebrain, however in recent years, the hindbrain has become a region of interest for research into the development of anxiety and depression, though the role of GR signalling in the hindbrain remains poorly characterised. To determine the role of glucocorticoid signalling in the hindbrain we have developed a novel mouse model that specifically ablates hindbrain GR to ascertain its role in behaviour, HPA-axis regulation and adrenal structure. Our study highlights that ablation of GR in the hindbrain results in excessive barbering, obsessive compulsive digging and lack of cage exploration. These mice also develop kyphosis, elevated circulating corticosterone and severe adrenal cortex disruption. Together, this data demonstrates a role for hindbrain GR signalling in regulating stress-related behaviour and identifies a novel mouse model to allow further investigation into the pathways impacting stress and anxiety.

OriginalsprogEngelsk
TidsskriftScientific Reports
Vol/bind9
Udgave nummer1
Sider (fra-til)3250
ISSN2045-2322
DOI
StatusUdgivet - 1 mar. 2019

ID: 56741688