Journal
NATURE CELL BIOLOGY
Volume 20, Issue 4, Pages 443-+Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41556-018-0072-9
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Funding
- ICREA 'Academia' (Generalitat de Catalunya)
- Universitat de Barcelona
- MINECO [SAF2013-40987R]
- Generalitat de Catalunya [2014SGR48]
- CIBERDEM ('Instituto de Salud Carlos III')
- INTERREG IV-B-SUDOE-FEDER (DIOMED) [SOE1/P1/E178]
- Severo Ochoa Award of Excellence from MINECO (Government of Spain)
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Excessive fat accumulation is a major risk factor for the development of type 2 diabetes mellitus and other common conditions, including cardiovascular disease and certain types of cancer. Here, we identify a mechanism that regulates adiposity based on the activator of autophagy TP53INP2. We report that TP53INP2 is a negative regulator of adipogenesis in human and mouse preadipocytes. In keeping with this, TP53INP2 ablation in mice caused enhanced adiposity, which was characterized by greater cellularity of subcutaneous adipose tissue and increased expression of master adipogenic genes. TP53INP2 modulates adipogenesis through autophagy-dependent sequestration of GSK3 ss into late endosomes. GSK3 ss sequestration was also dependent on ESCRT activity. As a result, TP53INP2 promotes greater ss-catenin levels and induces the transcriptional activity of TCF/LEF transcription factors. These results demonstrate a link between autophagy, sequestration of GSK3 ss into late endosomes and inhibition of adipogenesis in vivo.
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