期刊
FRONTIERS IN PHARMACOLOGY
卷 12, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fphar.2021.793449
关键词
musashi-2; RNA-binding protein; colorectal cancer; palmatine; musashi-2 targets
资金
- National Natural Science Foundation of China [81703757, 81874210, 81874319, 82173845, 81803754]
- Science and Technology Commission of Shanghai Municipality [18401933500, 21S11900900]
- Shanghai Municipal Education Commission [2019-01-07-00-10-E00072, 2021-01-07-00-10-E00116]
- Shanghai Youth Talent Support Program, Shuguang Project [19SG40]
- Program for Professor of Special Appointment (Eastern Scholar)
This study demonstrates the essential role of MSI2 in the survival of colorectal cancer cells and identifies palmatine as a functional antagonist for MSI2-dependent growth in cancer cells.
Musashi-2 (MSI2) is an evolutionally conserved RNA-binding protein and recently considered as an attractive therapeutic target in a wide spectrum of malignancies. However, MSI2-engaged mRNAs are not well profiled, and no MSI2-dependent antagonist is available so far. In the study, we created MSI2 knockout cancer cells and demonstrated that MSI2 is required for the survival of colorectal cancer HCT116 cells but not non-small cell lung cancer A549 cells. In addition, the global profiling of the transcriptome and proteomics of MSI2 knockout colorectal cells revealed 38 candidate MSI2-targeted genes. In a loss-rescue screening, palmatine was identified as a functional MSI2 antagonist inhibiting the MSI2-dependent growth of colorectal cancer cells. Finally, we confirmed that palmatine is directly bound to MSI2 at its C-terminal. Our findings not only indicated MSI2 as a promising therapeutic target of colorectal cancer but also provided a small molecule palmatine as a direct and functional MSI2 antagonist for cancer therapy.
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