Abstract:
:The present study aimed to determine the effect of thyroid hormone dysfunction on brown adipose tissue activity and white adipose tissue browning in mice. Twenty randomized female C57BL/6NTac mice per treatment group housed at room temperature were rendered hypothyroid or hyperthyroid. In-vivo small animal 18F-FDG PET/MRI was performed to determine the effects of hypo- and hyperthyroidism on BAT mass and BAT activity. Ex-vivo14C-acetate loading assay and assessment of thermogenic gene and protein expression permitted analysis of oxidative and thermogenic capacities of WAT and BAT of eu-, hyper and hypothyroid mice. 18F-FDG PET/MRI revealed a lack of brown adipose tissue activity in hypothyroid mice, whereas hyperthyroid mice displayed increased BAT mass alongside enhanced 18F-FDG uptake. In white adipose tissue of both, hyper- and hypothyroid mice, we found a significant induction of thermogenic genes together with multilocular adipocytes expressing UCP1. Taken together, these results suggest that both the hyperthyroid and hypothyroid state stimulate WAT thermogenesis most likely as a consequence of enhanced adrenergic signaling or compensation for impaired BAT function, respectively.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Weiner J,Kranz M,Klöting N,Kunath A,Steinhoff K,Rijntjes E,Köhrle J,Zeisig V,Hankir M,Gebhardt C,Deuther-Conrad W,Heiker JT,Kralisch S,Stumvoll M,Blüher M,Sabri O,Hesse S,Brust P,Tönjes A,Krause Kdoi
10.1038/srep38124subject
Has Abstractpub_date
2016-12-12 00:00:00pages
38124issn
2045-2322pii
srep38124journal_volume
6pub_type
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