SAT-584 Uc.336-As Inhibits White Adipocyte Differentiation and Promotes White to Brown Conversion

Brown adipose tissue (BAT) has gained its popularity since it shows great potential in counteracting obesity and metabolic diseases development. Transcribed ultraconserved regions (T-UCRs), a novel class of long non-coding RNA (lncRNAs), have been implicated in regulating diverse biological processes, including the process of white fat browning. However, the functional and mechanistic details of T-UCRs in the browning process are poorly understood. Here, we identified that a T-UCR, uc.336-as, played an important role during the browning process. uc.336-as was significantly elevated during browning process induced by exendin-4 or β3-adrenergic agonist (CL316,243). Moreover, we found that uc.336-as promoted browning process and inhibited adipogenesis. Finally, we identified that uc.336-as promoted the expression of browning-related genes via influencing the p38 mitogen-activated protein kinase (p38 MAPK) signaling, an essential signal pathway in metabolism. Taken together, our data show that uc.336-as acts as a negative regulator in white adipocyte differentiation and promotes the browning process, suggesting a potential therapeutic role for uc.336-as in controlling obesity.