Cited by 143Thyroid Disorders and TreatmentsThyroid Cancer Diagnosis and TreatmentGrowth Hormone and Insulin-like Growth Factors

Local impact of thyroid hormone inactivation

Open access
Dentice, Monica, Salvatore, Domenico·2011·Journal of Endocrinology

Abstract

Deiodination is a critical process by which the minimally active thyroxine (T(4)) molecule is converted into the favorite ligand for thyroid hormone (TH) receptors, triiodothyronine (T(3)). The iodothyronine deiodinases type 1, 2, and 3 (D1, D2, and D3) constitute a potent mechanism of TH activation (D1 and D2) or inactivation (D3), which functions by tissue specifically regulating TH bioavailability. D2 and D3 are widely expressed and in a dynamically and tightly coordinated fashion, thereby allowing cells to customize their own TH activity. D3, the major T(3) and T(4) inactivating deiodinase, catalyzes their conversion to 3,3'-diiodothyronine and to reverse T(3) respectively. According to common wisdom, D3 plays a major role in lowering serum TH concentrations during development, as supported by the much wider D3 tissue expression in the embryo structures than in the adult tissues. However, several recent studies show that D3 is reexpressed in adult life in various pathophysiological contexts, which strengthens the concept that cell-specific TH inactivation is a critical mediator in cellular TH metabolism. This review focuses on the progress made in understanding the physiological function and significance of D3. It summarizes the intriguing evidence that D3 plays a pivotal role in defining local TH concentration in the developing fetus and in several conditions in adult life.

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Crossref · 10.1530/joe-11-0002

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  • In critical conditions, the conversion of T4 to T3 is reduced while the conversion to rT3 is increased.

    “In these critical conditions, where a reduction of the metabolism and a reduced T3 level is physiologically desirable, the conversion of T4 to T3 is reduced, while the conversion to rT3 is increased.”

    From Can Reverse T3 Assay Be Employed to Guide T4 vs. T4/T3 Therapy in Hypothyroidism? (2019) · cites this paper as [5]

    The “Role of D3 in disease” section reports lower circulating T3, higher rT3, and increased D3 activity in critically ill patients; “Type 3 iodothyronine deiodinase” identifies D3 as converting T4 to rT3. The copy does not establish that T4-to-T3 conversion is reduced in those patients or that reduced metabolism and T3 are physiologically desirable. Page numbers were not provided. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Due to alterations in rates of local deiodination in tissues, thyroid hormone signaling can change irrespective of serum hormonal concentrations.

    “Due to alterations in rates of local deiodination in tissues, thyroid hormone signaling can change irrespective of serum hormonal concentrations (3, 5).”

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Authors
Dentice, M., & Salvatore, D.
Affiliations
Federico II University Hospital (IT)
Corresponding author
Dentice, Monica
Venue
Journal of Endocrinology
Published
2011-03-11
Volume
209
Issue
3
Pages
273-282
ISSN
  • 0022-0795 (ISSN-L)
  • 1479-6805
OpenAlex
W2318017892
Cited by
143
References
94
Citations by year
2026: 4 · 2025: 11 · 2024: 9 · 2023: 5 · 2022: 4 · 2021: 11 · 2020: 8 · 2019: 11 · 2018: 11 · 2017: 16 · 2016: 6 · 2015: 8 · 2014: 8 · 2013: 14 · 2012: 13
FWCI
1.73
Type
journal article
Language
en
Open access
Locations
  • Journal of Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • INFM-OAR (INFN Catania) (submittedVersion, other-oa)
Funders
Associazione Italiana per la Ricerca sul Cancro
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Disorders and Treatments
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Cancer Diagnosis and Treatment
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Growth Hormone and Insulin-like Growth Factors
Keywords
thyroid hormone inactivation, triiodothyronine, thyroxine, thyroid hormone receptor, reverse T3, 3,3'-diiodothyronine, fetal thyroid development
MeSH terms
Aging, Animals, Humans, Iodide Peroxidase, Thyroid Hormones, Thyroxine, Triiodothyronine

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