RPS15 interacted with IGF2BP1 to promote esophageal squamous cell carcinoma development via recognizing m6A modification

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作者
Yahui Zhao
Yang Li
Rui Zhu
Riyue Feng
Heyang Cui
Xiao Yu
Furong Huang
Ruixiang Zhang
Xiankai Chen
Lei Li
Yinghui Chen
Yuhao Liu
Jinhua Wang
Guanhua Du
Zhihua Liu
机构
[1] Chinese Academy of Medical Sciences and Peking Union Medical College,State Key Laboratory of Molecular Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital
[2] Peking University Shenzhen Hospital,Department of Oncology, Cancer Institute
[3] Shenzhen Peking University-Hong Kong University of Science and Technology (PKU-HKUST) Medical Center,Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital
[4] Chinese Academy of Medical Sciences & Peking Union Medical College,Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital
[5] Chinese Academy of Medical Sciences and Peking Union Medical College,School of Life Sciences
[6] Tsinghua University,Key Laboratory of Drug Target Research and Drug Screen, Institute of Materia Medica
[7] Chinese Academy of Medical Science and Peking Union Medical College,undefined
来源
Signal Transduction and Targeted Therapy | / 8卷
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摘要
Increased rates of ribosome biogenesis have been recognized as hallmarks of many cancers and are associated with poor prognosis. Using a CRISPR synergistic activation mediator (SAM) system library targeting 89 ribosomal proteins (RPs) to screen for the most oncogenic functional RPs in human esophageal squamous cell carcinoma (ESCC), we found that high expression of RPS15 correlates with malignant phenotype and poor prognosis of ESCC. Gain and loss of function models revealed that RPS15 promotes ESCC cell metastasis and proliferation, both in vitro and in vivo. Mechanistic investigations demonstrated that RPS15 interacts with the K homology domain of insulin-like growth factor 2 mRNA-binding protein 1 (IGF2BP1), which recognizes and directly binds the 3′-UTR of MKK6 and MAPK14 mRNA in an m6A-dependent manner, and promotes translation of core p38 MAPK pathway proteins. By combining targeted drug virtual screening and functional assays, we found that folic acid showed a therapeutic effect on ESCC by targeting RPS15, which was augmented by the combination with cisplatin. Inhibition of RPS15 by folic acid, IGF2BP1 ablation, or SB203580 treatment were able to suppress ESCC metastasis and proliferation via the p38 MAPK signaling pathway. Thus, RPS15 promotes ESCC progression via the p38 MAPK pathway and RPS15 inhibitors may serve as potential anti-ESCC drugs.
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