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Learn MoreLong noncoding RNAs (lncRNAs) have emerged as important components of gene regulatory network in embryonic stem cells (ESCs). However, the function and molecular mechanism of lncRNAs are still largely unknown. Here we identified Trincr1 (TRIM71 interacting long noncoding RNA 1) lncRNA that regulates the FGF/ERK signaling and self-renewal of ESCs. Trincr1 is exported by THOC complex to cytoplasm where it binds and represses TRIM71, leading to the downregulation of SHCBP1 protein. Knocking out Trincr1 led to the upregulation of phosphorylated ERK and ERK pathway target genes and the decrease of ESC self-renewal, while knocking down Trim71 completely rescued the defects of Trincr1 knockout. Furthermore, ectopic expression of Trincr1 repressed FGF/ERK signaling and the self-renewal of neural progenitor cells. Together, this study reveals novel regulators in FGF/ERK signaling pathway and highlights lncRNA as an important player in cell signaling network to coordinate cell fate specification. SOURCE: Yangming Wang (yangming.wang@pku.edu.cn) - Wang Peking University
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