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Thermogenic brown and beige adipose tissues dissipate chemical energy as heat, and their thermogenic activities can combat obesity and diabetes. Herein the functional adaptations to cold of brown and beige adipose depots are examined using quantitative mitochondrial proteomics. We identify arginine/creatine metabolism as a beige adipose signature and demonstrate that creatine enhances respiration in...
Nonalcoholic fatty liver disease (NAFLD) affects up to 30% of the adult population in Western societies, yet the underlying molecular pathways remain poorly understood. Here, we identify the dimeric Activator Protein 1 as a regulator of NAFLD. Fos-related antigen 1 (Fra-1) and Fos-related antigen 2 (Fra-2) prevent dietary NAFLD by inhibiting prosteatotic PPARγ signaling. Moreover, established NAFLD...
The Activator Protein 1 (AP‐1) transcription factor subunit Fos‐related antigen 1 (Fra‐1) has been implicated in liver fibrosis. Here we used loss‐of‐function as well as switchable, cell type‐specific, gain‐of‐function alleles for Fra‐1 to investigate the relevance of Fra‐1 expression in cholestatic liver injury and fibrosis. Our results indicate that Fra‐1 is dispensable in three well‐established,...
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