Abstract
Cellular senescence serves as a critical tumor-suppressive mechanism across various cancer types, yet its role in FLT3-ITD-positive acute myeloid leukemia (AML) remains poorly understood. Through the analysis of multiple sequencing datasets, we identified that FLT3-ITD-positive patients with low p16INK4a expression have significantly worse prognoses. Consistent with these clinical findings, knockout of p16INK4a in mice was shown to accelerate FLT3-ITD AML onset. Mechanistic investigations further revealed that the FLT3-ITD mutation suppresses p16INK4a expression via the STAT5A-E2F3-EZH2 signaling axis. This downregulation of p16INK4a allows cells to evade senescence, thereby promoting increased malignancy and establishing a positive feedback loop that exacerbates disease progression. This mechanism provides a molecular explanation for the poorer long-term survival observed in this patient subset. Furthermore, the FLT3-ITD-STAT5A/E2F3/EZH2-p16INK4a axis identified in this study represents a promising therapeutic target for addressing refractory FLT3-ITD AML with low p16INK4a expression.

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Data availability
The data sets generated by this study are available through the Genome Sequence Archive, accession number: HRA010951. The data that support the findings of this study are available from the corresponding author upon reasonable request.
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Acknowledgements
This work was supported by a Ministry of Science and Technology of the People’s Republic of China grant (2021YFA1101603), Chinese Academy of Medical Sciences Innovation Fund for Medical Sciences grants (CIFMS) (2023-I2M-C&T-B-106, 2021-I2M-1-040, 2023-I2M-2-007, 2022-I2M-1-022), the National Natural Science Foundation of China (82270144, 82100198), and the Haihe Laboratory of Cell Ecosystem Innovation Fund (22HHXBSS00039).
Author contibutions
These authors jointly supervised this work: Wenyu Yang, Tianyuan Hu, and Yingchi Zhang. Y.Z., W.Y. and X.Z. conceived the study; Y.Z. and T.H. designed the project outline and acquired its main funding, supervised experimental studies, helped write the manuscript; T.H. and J.Z. determined the methodology; J.Z. wrote the manuscript, carried out experiments, drew figures; L.J. carried out experiments, drew figures; Y.C. carried out experiments, drew figures; S.Z. carried out experiments; Y.D. carried out experiments; P.W. drew figures, reviewed the manuscript.
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Protocols covering all study procedures were approved by the institutional review board of the Institute of Hematology, Blood Diseases Hospital, Peking Union Medical College/Chinese Academy of Medical Sciences (PUMC/CAMS). All patients were provided written informed consent to participate in studies and for the research use of their specimens in agreement with the Declaration of Helsinki.
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Zheng, J., Jin, L., Chen, Y. et al. Targeting p16INK4a-mediated cellular senescence as a therapeutic strategy for FLT3-ITD-driven acute myeloid leukemia. Leukemia 39, 2652–2662 (2025). https://doi.org/10.1038/s41375-025-02743-y
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DOI: https://doi.org/10.1038/s41375-025-02743-y


