Cited by 99Thyroid Disorders and TreatmentsAdrenal Hormones and DisordersHormonal and reproductive studies

Thyroid axis function and dysfunction in critical illness

Mebis, Liese, Van den Berghe, Greet·2011·Best Practice & Research Clinical Endocrinology & Metabolism

Abstract

Acutely ill patients typically present with low circulating T3 and increased reverse T3. When illness is severe and prolonged, also pulsatile TSH secretion and circulating T4 levels are low. This constellation of changes within the thyroid axis is referred to as the low T3 syndrome or non-thyroidal illness syndrome (NTI), and comprises both peripheral and central alterations in the thyroid axis. Acute alterations are dominated by changes in thyroid hormone binding, in thyroid hormone uptake by the cell and in the activity of the type-1 and type-3 deiodinase enzymes. Prolonged critical illness is associated with a neuroendocrine dysfunction characterized by suppressed hypothalamic thyrotropin-releasing hormone (TRH) expression, resulting in reduced stimulation of the thyrotropes whereby thyroidal hormone release is impaired. During prolonged critical illness, several tissue responses could be interpreted as compensatory to low thyroid hormone availability, such as increased expression of monocarboxylate transporters, upregulation of type 2 deiodinase activity and increased sensitivity at the receptor level. Whether the low T3 syndrome should be treated and which compound should be used remains to be further studied.

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Crossref · 10.1016/j.beem.2011.03.002

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  • A variety of changes in TH transporters, deiodinase and TR action have been observed in different organs and tissues both during acute and chronic illness, while serum TH levels are uniformly downregulated.

    “A variety of changes in TH transporters, deiodinase and TR action have been observed in different organs and tissues both during acute and chronic illness, while serum TH levels are uniformly downregulated [3, 11].”

    From An update on non-thyroidal illness syndrome (2021) · cites this paper as [11]

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Authors
Mebis, L., & Van den Berghe, G.
Affiliations
KU Leuven (BE)
Venue
Best Practice & Research Clinical Endocrinology & Metabolism
Publisher
Elsevier BV
Published
2011-10
Volume
25
Issue
5
Pages
745-757
ISSN
1521-690X (ISSN-L)
OpenAlex
W2151252758
Cited by
99
References
101
Citations by year
2026: 3 · 2024: 5 · 2023: 7 · 2022: 4 · 2021: 7 · 2020: 5 · 2019: 11 · 2018: 7 · 2017: 5 · 2016: 14 · 2015: 6 · 2014: 9 · 2013: 10 · 2012: 4
FWCI
6.29
Type
journal article
Language
en
Open access
closed
Locations
  • Best Practice & Research Clinical Endocrinology & Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • Lirias (KU Leuven) (submittedVersion)
Funders
  • Fund for Scientific Research (FWO), Flanders, Belgium (G.0578.09)
  • Flemish government
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Disorders and Treatments
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal and reproductive studies
Keywords
hypothalamic-pituitary-thyroid axis, critical illness, low T3 syndrome, reverse T3, thyroid hormone binding, type 2 deiodinase, thyrotropin-releasing hormone, thyroid hormone uptake, monocarboxylate transporters, thyroid hormone replacement
MeSH terms
Animals, Critical Care, Humans, Hypothalamus, Pituitary Gland, Thyroid Diseases, Thyroid Gland, Thyroid Hormones, Critical Illness

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