Title: Expression of thyroid hormone transporters during critical illness
Authors: Mebis, Liese ×
Paletta, Deborah
Debaveye, Yves
Ellger, Björn
Langouche, Lies
D'Hoore, André
Darras, Veerle
Visser, Theo J
Van den Berghe, Greet #
Issue Date: Aug-2009
Publisher: BioScientifica Ltd.
Series Title: European Journal of Endocrinology vol:161 issue:2 pages:243-250
Abstract: OBJECTIVE: Prolonged critically ill patients have low circulating thyroid hormone (TH) levels without a rise in TSH, a condition labeled 'the low tri-iodothyronine (T(3)) syndrome'. Currently, it is not clear whether this represents an adaptive response. We examined the role of TH transporters monocarboxylate transporter 8 (MCT8, also known as SLC16A2) and MCT10 in the pathogenesis of the low T(3) syndrome in prolonged critical illness. METHODS: A clinical observational study in critically ill patients and an intervention study in an in vivo animal model of critical illness. Gene expression levels of MCT8 and MCT10 were measured by real-time PCR. RESULTS: In prolonged critically ill patients, we measured increased MCT8 but not MCT10 gene expression levels in liver and skeletal muscle as compared with patients undergoing acute surgical stress. In a rabbit model of prolonged critical illness, gene expression levels of MCT8 in liver and of MCT10 in skeletal muscle were increased as compared with healthy controls. Treatment of prolonged critically ill rabbits with TH (thyroxine+T(3)) resulted in a downregulation of gene expression levels of MCT8 in liver and of MCT10 in muscle. Transporter expression levels correlated inversely with circulating TH parameters. CONCLUSIONS: These data suggest that alterations in the expression of TH transporters do not play a major role in the pathogenesis of the 'low T(3) syndrome' but rather reflect a compensatory effort in response to hypothyroidism.
ISSN: 0804-4643
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Laboratory for Intensive Care Medicine (-)
Abdominal Surgical Oncology
Animal Physiology and Neurobiology Section - miscellaneous
Laboratory of Intensive Care Medicine
× corresponding author
# (joint) last author

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