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- W1818595191 abstract "Critical illness represents a life-threatening disorder necessitating recruitment of defence mechanisms for survival. Herein, the hypothalamic-pituitary-adrenal axis is essential. However, the relevance of a relative insufficiency of the hypothalamic-pituitary-adrenal axis in critical illness, which is diagnosed by a suppressed cortisol response to exogenous adrenocorticotropic hormone (ACTH) irrespective of the plasma cortisol concentration, is controversial. Findings from several studies have provided insights that clarify at least part of this controversy. Rather than an activated hypothalamic-pituitary-adrenal axis, ACTH-independent regulators have been reported to contribute to increased cortisol availability during critical illness. One of these regulators is reduced cortisol breakdown, mediated by suppressed expression and activity of cortisol metabolising enzymes in the liver and kidneys. This downstream mechanism increases concentrations of plasma cortisol, but the ensuing feedback-inhibited ACTH release, when sustained for more than 1 week, has been shown to negatively affect adrenocortical integrity and function. Reduced adrenocortical ACTH signalling could explain reduced cortisol responses to exogenous ACTH. Whether such reduced cortisol responses in the presence of raised plasma (free) cortisol identifies adrenal failure needing treatment is unlikely. Additionally, reduced cortisol breakdown affects the optimum dose of hydrocortisone treatment during critical illness. Identification of patients with an insufficient hypothalamic-pituitary-adrenal axis response and the optimum treatment for this disorder clearly need more well designed preclinical and clinical studies." @default.
- W1818595191 created "2016-06-24" @default.
- W1818595191 creator A5006906048 @default.
- W1818595191 creator A5015292541 @default.
- W1818595191 creator A5042145557 @default.
- W1818595191 date "2015-10-01" @default.
- W1818595191 modified "2023-10-16" @default.
- W1818595191 title "New insights into the controversy of adrenal function during critical illness" @default.
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- W1818595191 doi "https://doi.org/10.1016/s2213-8587(15)00224-7" @default.
- W1818595191 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26071883" @default.
- W1818595191 hasPublicationYear "2015" @default.
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