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Cold-induced expression of a truncated adenylyl cyclase 3 acts as rheostat to brown fat function

Khani, Sajjad (author)
Topel, Hande (author)
Kardinal, Ronja (author)
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Tavanez, Ana Rita (author)
Josephrajan, Ajeetha (author)
Larsen, Bjørk Ditlev Marcher (author)
Gaudry, Michael James, 1990- (author)
Stockholms universitet,Institutionen för molekylär biovetenskap, Wenner-Grens institut
Leyendecker, Philipp (author)
Meincke Egedal, Nadia (author)
Güller, Aylin Seren (author)
Stanic, Natasa (author)
Ruppert, Phillip M. M. (author)
Gaziano, Isabella (author)
Hansmeier, Nils Rouven (author)
Schmidt, Elena (author)
Klemm, Paul (author)
Vagliano, Lara-Marie (author)
Stahl, Rainer (author)
Duthie, Fraser (author)
Krause, Jens-Henning (author)
Bici, Ana (author)
Engelhard, Christoph Andreas (author)
Gohlke, Sabrina (author)
Frommolt, Peter (author)
Gnad, Thorsten (author)
Rada-Iglesias, Alvaro (author)
Pradas-Juni, Marta (author)
Schulz, Tim Julius (author)
Wunderlich, Frank Thomas (author)
Pfeifer, Alexander (author)
Bartelt, Alexander (author)
Jastroch, Martin, 1977- (author)
Stockholms universitet,Institutionen för molekylär biovetenskap, Wenner-Grens institut
Wachten, Dagmar (author)
Kornfeld, Jan-Wilhelm (author)
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 (creator_code:org_t)
2024
2024
English.
In: Nature Metabolism. - 2522-5812.
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Promoting brown adipose tissue (BAT) activity innovatively targets obesity and metabolic disease. While thermogenic activation of BAT is well understood, the rheostatic regulation of BAT to avoid excessive energy dissipation remains ill-defined. Here, we demonstrate that adenylyl cyclase 3 (AC3) is key for BAT function. We identified a cold-inducible promoter that generates a 5′ truncated AC3 mRNA isoform (Adcy3-at), whose expression is driven by a cold-induced, truncated isoform of PPARGC1A (PPARGC1A-AT). Male mice lacking Adcy3-at display increased energy expenditure and are resistant to obesity and ensuing metabolic imbalances. Mouse and human AC3-AT are retained in the endoplasmic reticulum, unable to translocate to the plasma membrane and lack enzymatic activity. AC3-AT interacts with AC3 and sequesters it in the endoplasmic reticulum, reducing the pool of adenylyl cyclases available for G-protein-mediated cAMP synthesis. Thus, AC3-AT acts as a cold-induced rheostat in BAT, limiting adverse consequences of cAMP activity during chronic BAT activation. 

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Medicinska och farmaceutiska grundvetenskaper -- Cell- och molekylärbiologi (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Basic Medicine -- Cell and Molecular Biology (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Endokrinologi och diabetes (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Endocrinology and Diabetes (hsv//eng)

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