Abstract
Cancer stem cells (CSCs) contribute to chemotherapy resistance and poor prognosis, posing significant challenges in the treatment of oral squamous cell carcinoma. The extracellular matrix (ECM)-constructed microenvironment remodels the niche of CSCs. Yet mechanisms by which biophysical properties of ECM relate to CSCs remain undefined. Here, our findings link ECM mechanical stimuli to CSCs phenotype transition, and propose that ECM stiffening mechanoactivates tumor cells to dedifferentiate and acquire CD44+ stem cell-like characteristics through noncanonical mechanotransduction. ITGB1 senses and transduces biomechanical signals, while FERMT1 acts as an intracellular mechanotransduction downstream, activating CSCs. Mechanistically, FERMT1 promotes the proteasomal degradation of CK1α by E3 ubiquitin ligase MIB1, thereby triggering Wnt signaling pathway. Combining targeted ECM softening with mechanotransduction inhibition strategy significantly attenuates tumor stemness and chemoresistance in vivo. Therefore, our findings highlight the role of ECM in regulating CSCs via biomechanical-dependent manner, suggesting the ECM/ITGB1/FERMT1/Wnt axis as a promising therapeutic target for CSCs therapy.
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Data availability
The datasets generated during the current study are available from the corresponding author upon reasonable request.
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Acknowledgements
The authors are grateful to Junjie Zhang (Frontier Science Center for Immunology and Metabolism, Wuhan University) for his support and help.
Funding
This study was supported by National Key R&D Programme of China (Grant No. 2022YFC2504200 to Z. Shang) and National Natural Science Foundation of China (Grant No. 82273306).
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The authors contributed in the following way: designed and performed the research: XL; wrote the manuscripts: XL; data analysis: EJ and YC; performed experiments: PL, YW, JL, YW and ZL; supervised the research: ZS and HZ.
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This study was approved and supervised by the Ethics Committee of the School and Hospital of Stomatology, Wuhan University (2022LUNSHENZIA05), and was performed in accordance with the relevant guidelines and regulations. All experiments involving patients were conducted with their informed consent. All animal studies were conducted following the guidance of the Ethical Committee on Animal Experiments of Animal Care Committee of Wuhan University (S07924020H). This research did not involve identifiable images of human participants.
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Li, X., Zhao, H., Jiang, E. et al. ITGB1/FERMT1 mechanoactivation enhances CD44 characteristic stemness in oral squamous cell carcinoma via ubiquitin-dependent CK1α degradation. Oncogene 44, 1530–1544 (2025). https://doi.org/10.1038/s41388-025-03317-z
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DOI: https://doi.org/10.1038/s41388-025-03317-z
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