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The TBLR1/TBL1 co-factor complex acts as a transcriptional checkpoint in the brown adipose tissue response to prolonged cold exposure

Brown adipose tissue (BAT) is a key thermogenic organ, whose activation in response to cold environmental temperatures and β-adrenergic stimulation requires the proper function of the NCOR/HDAC3 corepressor complex in brown adipocytes. The NCOR/HDAC3 complex is large and multi-component, including t...

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Hauptverfasser: Köker, Sahika Cingir (VerfasserIn) , Tsokanos, Foivos-Filippos (VerfasserIn) , El-Merahbi, Rabih (VerfasserIn) , Jha, Ankush Kumar (VerfasserIn) , Cicatelli, Karin (VerfasserIn) , Weber, Peter (VerfasserIn) , Mhamane, Amit (VerfasserIn) , Kaltenecker, Doris (VerfasserIn) , Morigny, Pauline (VerfasserIn) , Loft, Anne (VerfasserIn) , Klepac, Katarina (VerfasserIn) , Maida, Adriano (VerfasserIn) , Molocea, Claudia-Eveline (VerfasserIn) , Hass, Daniela (VerfasserIn) , Vogl, Elena Sophie (VerfasserIn) , Alfaro, Ana Jimena (VerfasserIn) , Sun, Wenfei (VerfasserIn) , Zitzelsberger, Horst (VerfasserIn) , Unger, Kristian (VerfasserIn) , Szendrödi, Julia (VerfasserIn) , Li, Yongguo (VerfasserIn) , Diaz, Mauricio Berriel (VerfasserIn) , Wolfrum, Christian (VerfasserIn) , Bartelt, Alexander (VerfasserIn) , Herzig, Stephan (VerfasserIn) , Georgiadi, Anastasia (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 11 August 2025
In: The FASEB journal
Year: 2025, Jahrgang: 39, Heft: 15, Pages: 1-15
ISSN:1530-6860
DOI:10.1096/fj.202402993RRR
Online-Zugang:Verlag, kostenfrei, Volltext: https://doi.org/10.1096/fj.202402993RRR
Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1096/fj.202402993RRR
Volltext
Verfasserangaben:Sahika Cingir Köker, Foivos-Filippos Tsokanos, Rabih El-Merahbi, Ankush Kumar Jha, Karin Cicatelli, Peter Weber, Amit Mhamane, Doris Kaltenecker, Pauline Morigny, Anne Loft, Katarina Klepac, Adriano Maida, Claudia-Eveline Molocea, Daniela Hass, Elena Sophie Vogl, Ana Jimena Alfaro, Wenfei Sun, Horst Zitzelsberger, Kristian Unger, Julia Szendrödi, Yongguo Li, Mauricio Berriel Diaz, Christian Wolfrum, Alexander Bartelt, Stephan Herzig, Anastasia Georgiadi
Beschreibung
Zusammenfassung:Brown adipose tissue (BAT) is a key thermogenic organ, whose activation in response to cold environmental temperatures and β-adrenergic stimulation requires the proper function of the NCOR/HDAC3 corepressor complex in brown adipocytes. The NCOR/HDAC3 complex is large and multi-component, including the transducin beta-like 1 (TBL1) and TBL1-related 1 (TBLR1) proteins. Loss of TBL1 in the hepatocytes and TBLR1 in the white adipocytes has been shown to impair fasting- and β-adrenergic-induced lipolysis. However, their roles in BAT thermogenesis remain unknown. Here, we report that deletion of TBLR1 alone in brown adipocytes does not impair the adaptive thermogenic response to prolonged cold exposure. In contrast, simultaneous deletion of TBL1 and TBLR1 dampens β-adrenergic-induced lipolysis and mitochondrial respiration in cultured mouse brown adipocytes. Transgenic mice with UCP1-Cre mediated double deletion of TBLR1 and TBL1 exhibit reduced whole-body energy expenditure during prolonged cold exposure, lower core body temperature, increased appearance of unilocular adipocytes in BAT, and suppressed expression of metabolic and myogenic PRDM16 target genes. Also, we present some evidence that TBLR1 and TBL1 interact with HDAC3 and PRDM16 in brown adipocytes, potentially suggesting a direct involvement in the PRDM16-controlled transcriptional program. These findings identify the TBLR1/TBL1 complex as a critical regulator of BAT adaptation to prolonged cold and systemic energy homeostasis, shedding light on the context-dependent functions of corepressor complexes.
Beschreibung:Gesehen am 17.12.2025
Beschreibung:Online Resource
ISSN:1530-6860
DOI:10.1096/fj.202402993RRR

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