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Divergent regulation of distinct glucocorticoid systems in alcohol dependence

Research output: Contribution to journalArticle

Scott Edwards, Hilary J. Little, Heather N. Richardson, Leandro F. Vendruscolo

Original languageEnglish
Pages (from-to)811-816
Number of pages6
JournalAlcohol
Volume49
Issue number8
DOIs
Publication statusE-pub ahead of print - 30 Apr 2015

King's Authors

Abstract

Chronic alcohol consumption disrupts glucocorticoid signaling at multiple physiological levels to interact with several disease-related processes associated with neuroendocrine and psychiatric disorders. Excessive alcohol use produces stress-related neuroadaptations at the level of the hypothalamic-pituitary-adrenal (HPA) axis as well as within central (extra-hypothalamic) neural circuitry, including the central amygdala (CeA) and prefrontal cortex (PFC). Altered glucocorticoid receptor (GR) signaling in these areas following excessive alcohol exposure is postulated to mediate the transition from recreational drinking to dependence, as well as the manifestation of a host of cognitive and neurological deficits. Specifically, a bidirectional regulation of stress systems by glucocorticoids leads to the development of an HPA axis tolerance and a concomitant sensitization of cortical and subcortical circuitries. A greater understanding of how hypothalamic and extra-hypothalamic glucocorticoid systems interact to mediate excessive drinking and related pathologies will lead to more effective therapeutic strategies for alcohol use disorder (AUD) and closely related comorbidities.

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