RT Journal Article T1 Thyroid-hormone-induced browning of white adipose tissue does not contribute to thermogenesis and glucose consumption A1 Johann, Kornelia A1 Cremer, Anna Lena A1 Fischer, Alexander W. A1 Heine, Markus A1 Rial Pensado, Eva A1 Resch, Julia A1 Nock, Sebastian A1 Virtue, Samuel A1 Harder, Lisbeth A1 Oelkrug, Rebecca A1 Astiz, Mariana A1 Brabant, Georg A1 Warner, Amy A1 Vidal Puig, Antonio A1 Oster, Henrik A1 Boelen, Anita A1 López Pérez, Miguel A. A1 Heeren, Joerg A1 Dalley, Jeffrey W. A1 Backes, Heiko A1 Mittag, Jens K1 Brown adipose tissue K1 Beige adipose tissue K1 Uncoupling protein 1 K1 Thyroid hormone receptor K1 Body temperature K1 Norepinephrine K1 Sympathetic nervous system K1 Metabolism K1 Beta3-adrenergic receptor K1 Pyrexia K1 Hyperthermia K1 Glucose tolerance AB Regulation of body temperature critically depends on thyroid hormone (TH). Recent studies revealed that TH induces browning of white adipose tissue, possibly contributing to the observed hyperthermia in hyperthyroid patients and potentially providing metabolic benefits. Here, we show that browning by TH requires TH-receptor β and occurs independently of the sympathetic nervous system. The beige fat, however, lacks sufficient adrenergic stimulation and is not metabolically activated despite high levels of uncoupling protein 1 (UCP1). Studies at different environmental temperatures reveal that TH instead causes hyperthermia by actions in skeletal muscle combined with a central body temperature set-point elevation. Consequently, the metabolic and thermogenic effects of systemic hyperthyroidism were maintained in UCP1 knockout mice, demonstrating that neither beige nor brown fat contributes to the TH-induced hyperthermia and elevated glucose consumption, and underlining that the mere presence of UCP1 is insufficient to draw conclusions on the therapeutic potential of browning agents PB Elsevier SN 2211-1247 YR 2019 FD 2019 LK http://hdl.handle.net/10347/21643 UL http://hdl.handle.net/10347/21643 LA eng NO Johann, K., Cremer, A. L., Fischer, A.W. et al. (2019). Thyroid-Hormone-Induced Browning of White Adipose Tissue Does Not Contribute to Thermogenesis and Glucose Consumption. Cell rep, 27, 11, 3385-3400. doi: 10.1016/j.celrep.2019.05.054 NO This work was supported by grants of the Deutsche Forschungsgemeinschaft (MI1242/2-2 and 3-2 Heisenberg Program and MI1242/4-1 and 5-1 SPP1629 “Thyroid TransAct” to J.M.; AS547-1/1 to M.A.; GRK1957 “Adipocyte-Brain-Crosstalk”), Young Active Research in Endocrinology, Bioscientifica Trust (BT-000011), and European Society for Endocrinology to K.J. A.V.-P. and S.V. were funded by the BHF (RG/18/7/33636). M.L. was funded by Xunta de Galicia (2016-PG068) and Ministerio de Economía y Competitividad (MINECO) (SAF2015-71026-R). H.O. is a Lichtenberg Fellow of the Volkswagen Stiftung DS Minerva RD 28 abr 2026