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  • Inhibition of the JNK/MAPK ...
    Xie, Shu-Juan; Li, Jun-Hao; Chen, Hua-Feng; Tan, Ye-Ya; Liu, Shu-Rong; Zhang, Yin; Xu, Hui; Yang, Jian-Hua; Liu, Shun; Zheng, Ling-Ling; Huang, Mian-Bo; Guo, Yan-Hua; Zhang, Qi; Zhou, Hui; Qu, Liang-Hu

    Cell death and differentiation, 09/2018, Letnik: 25, Številka: 9
    Journal Article

    Skeletal muscle differentiation is controlled by multiple cell signaling pathways, however, the JNK/MAPK signaling pathway dominating this process has not been fully elucidated. Here, we report that the JNK/MAPK pathway was significantly downregulated in the late stages of myogenesis, and in contrast to P38/MAPK pathway, it negatively regulated skeletal muscle differentiation. Based on the PAR-CLIP-seq analysis, we identified six elevated miRNAs (miR-1a-3p, miR-133a-3p, miR-133b-3p, miR-206-3p, miR-128-3p, miR-351-5p), namely myogenesis-associated miRNAs (mamiRs), negatively controlled the JNK/MAPK pathway by repressing multiple factors for the phosphorylation of the JNK/MAPK pathway, including MEKK1, MEKK2, MKK7, and c-Jun but not JNK protein itself, and as a result, expression of transcriptional factor MyoD and mamiRs were further promoted. Our study revealed a novel double-negative feedback regulatory pattern of cell-specific miRNAs by targeting phosphorylation kinase signaling cascade responsible for skeletal muscle development.