| First Author | Deng Y | Year | 2018 |
| Journal | Mol Metab | PubMed ID | 29551634 |
| Mgi Jnum | J:260830 | Mgi Id | MGI:6150613 |
| Doi | 10.1016/j.molmet.2018.02.013 | Citation | Deng Y, et al. (2018) Adipocyte Xbp1s overexpression drives uridine production and reduces obesity. Mol Metab 11:1-17 |
| abstractText | OBJECTIVE: The spliced transcription factor Xbp1 (Xbp1s), a transducer of the unfolded protein response (UPR), regulates lipolysis. Lipolysis is stimulated by fasting when uridine synthesis is also activated in adipocytes. METHODS: Here we have examined the regulatory role Xbp1s in stimulation of uridine biosynthesis in adipocytes and triglyceride mobilization using inducible mouse models. RESULTS: Xbp1s is a key molecule involved in adipocyte uridine biosynthesis and release by activation of carbamoyl-phosphate synthetase 2, aspartate transcarbamylase, dihydroorotase (CAD), the rate-limiting enzyme for UMP biosynthesis. Adipocyte Xbp1s overexpression drives energy mobilization and protects mice from obesity through activation of the pyrimidine biosynthesis pathway. CONCLUSION: These observations reveal that Xbp1s is a potent stimulator of uridine production in adipocytes, enhancing lipolysis and invoking a potential anti-obesity strategy through the induction of a futile biosynthetic cycle. |
