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Pan, Yongbo; Gu, Yinmin; Liu, Tihui; Zhang, Qingqing; Yang, Facai; Duan, Liqiang; Cheng, Shuwen; Zhu, Xiaofeng; Xi, Yibo; Chang, Xiaoli; Ye, Qinong; Gao, Shan
Proceedings of the National Academy of Sciences - PNAS, 04/2023, Volume: 120, Issue: 14Journal Article
Overexpression of Ras, in addition to the oncogenic mutations, occurs in various human cancers. However, the mechanisms for epitranscriptic regulation of in tumorigenesis remain unclear. Here, we report that the widespread -methyladenosine (m A) modification of , but not and , is higher in cancer tissues compared with the adjacent tissues, which results in the increased expression of H-Ras protein, thus promoting cancer cell proliferation and metastasis. Mechanistically, three m A modification sites of 3' UTR, which is regulated by FTO and bound by YTHDF1, but not YTHDF2 nor YTHDF3, promote its protein expression by the enhanced translational elongation. In addition, targeting m A modification decreases cancer proliferation and metastasis. Clinically, up-regulated H-Ras expression correlates with down-regulated FTO and up-regulated YTHDF1 expression in various cancers. Collectively, our study reveals a linking between specific m A modification sites of and tumor progression, which provides a new strategy to target oncogenic Ras signaling.
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