Abstract
RNA modification recognition proteins are crucial in cancer development and progression. Among all RNA modification-related proteins (RMRPs), Weighted Gene Co-expression Network Analysis (WGCNA), combined with comprehensive bioinformatic analysis, suggests that NAT10—the sole known writer of N4-acetylcytidine (ac4C)—is a critical regulatory protein in colorectal cancer (CRC) progression. NAT10 facilitates the malignancy phenotypes and DNA damage repair in CRC cells via its ac4C transferase activity and regulation of PPAN. Specifically, NAT10 enhances the translation efficiency of PPAN via acetylation at the C744 and C747 sites. In addition, NAT10 promotes the translation of ac4C-modified MYC mRNA. MYC protein then enhances PPAN transcription through binding to the PPAN promoter. The newly identified ac4C reader protein MYBBP1A mediates NAT10-induced translation of both PPAN and MYC. We further found that VDR binds to the NAT10 promoter to activate its transcription, resulting in the high expression of NAT10 in CRC. Xenograft studies and clinical data confirmed the role of the NAT10-PPAN axis in promoting CRC development and DNA damage repair. Collectively, our study reveals the role and underlying mechanism of mRNA ac4C modification in CRC progression, providing critical potential targets for CRC drug development.

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The datasets generated and/or analyzed during the current study are available from the corresponding author upon reasonable request.
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Acknowledgements
We thank Prof Muyan Cai at the Cancer Center of Sun Yat-sen University for plasmid donation, and the staff of Sichuan Higher Education Institute Key Laboratory of Major Disease Target Discovery and Protein Drug Development, and the Irradiation Preservation and Effect Key Laboratory of Sichuan Province.
Funding
This research was supported by the National Natural Science Foundation of China (Nos. 82472761, 82173833, and 82272658), the Guangdong Basic and Applied Basic Research Foundation (Nos. 2023B1515040006, 2021A1515111161, and 2023A1515010118), the Key-Area Research and Development Program of Guangdong Province (No. 2023B1111020007), the Guangzhou Science and Technology Program (No. 2024A04J6480), the Guangdong Provincial Key Laboratory of Construction Foundation (No. 2023B1212060022), the Fundamental Research Funds for the Central Universities (Sun Yat-sen University) (Nos. 24xkjc018, 23qnpy117), the Shenzhen Bay Scholars Program, the Open Fund of Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases (No. 2020B1212060023), the CMC Excellent-talent Program (No. 2024kjTzn03), the Organized Research Projects of Chengdu Medical College (No. CYYZZ24-01), the Clinical Science Research Foundations of Chengdu Medical College (Nos. 2022LHTD-02, 23LHNBZZD07, 24LHBBYY1-08, 24LHBBYY1-09, and 24LHFYSZ1-27).
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K Zhang, HS Wang, C Yi, HR Wang, and LC Ge designed and initiated the study. HR Wang, JN Li, K Zhong, SZ Li, NJ Ma, ZZ Xu and YL Rui performed experiments. HR Wang, LC Ge, LJ Tao and JW Zhou, WF Yang wrote the paper. HR Wang, XS Wang and X Chang provided assistance in bioinformatics analysis. WL Li, K Zhang, ZJ Chen, ZT Wang, YQ Lu, Abdulaziz Ahmed A.Saad, and GY Xie in charge of supervision as well as data curation.
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This study was conducted with approval from the Medical Ethics Committee of Huadu District People’s Hospital, Guangzhou (Approval No. 2025158) and informed consent from all patients, in compliance with the Declaration of Helsinki. Animal experimental protocols were reviewed and approved by the Institutional Animal Care and Use Committee of Sun Yat-sen University (Approval Nos. SYSU-IACUC-2023-001865, SYSU-IACUC-2024-001583).
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Wang, H., Ge, L., Li, J. et al. NAT10 triggers colorectal cancer progression via promoting PPAN-regulated DNA damage repair. Oncogene 45, 558–576 (2026). https://doi.org/10.1038/s41388-025-03661-0
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DOI: https://doi.org/10.1038/s41388-025-03661-0


