Abstract
Although the use of tyrosine kinase inhibitors (TKIs), such as sunitinib, has led to impressive advancements in the treatment of clear cell renal cell carcinoma (ccRCC), primary or acquired resistance to sunitinib remains elusive. Here, we report that death receptor 5 (DR5) is upregulated in ccRCC tissues and sunitinib-resistant cells, and is associated with poor outcomes and sunitinib resistance. Gain- and loss-of-function experiments revealed that DR5 promotes sunitinib resistance both in vitro and in vivo. Mechanistically, DR5 enhances the activation of NF-κB signalling by reducing the ubiquitin-mediated proteasomal degradation of p65 via competitive binding to the CUL4B-DDB1 E3 ligase complex linker protein WDR12, leading to the transcriptional upregulation of DR5 and BCL2. The positive feedback loop between DR5 and p65 contributes to the upregulation of BCL2 expression, which in turn modulates sunitinib resistance in ccRCC. Notably, targeting the DR5/NF-κB/BCL2 axis sensitizes ccRCC cells to sunitinib both in vitro and in vivo. Clinically, ccRCC patients with high DR5 expression show decreased responsiveness to TKI-based therapy. Collectively, these results highlight the importance of the positive feedback loop involving the DR5/NF-κB axis in sunitinib resistance and provide an effective therapeutic strategy for overcoming resistance.

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Data availability
The data analyzed in this study were obtained from the Gene Expression Omnibus (GEO) databases at GSE54052 and GSE68629. The sequence data generated in this study have been deposited in the NCBI SRA database (SRA PRJNA1236818).
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Acknowledgements
We sincerely thank Prof. Xiaoping Zhang for providing the sunitinib-resistant RCC cells. We thank all the patients involved in this study.
Funding
This work was supported by grants from the Minimally Invasive Innovation Team of the Urology Department of the Chinese PLA General Hospital (X. Zhang), the Priority Specialty in Medicine (X. Zhang), Development of Key Clinical Specialties (X. Zhang), the Pioneer Program for Discipline Innovation and Development of the Third Medical Center of PLA General Hospital (2024BJ-11 to Y. Huang), the Youth Fund of Chinese PLA General Hospital (22QNCZ022 to Y. Huang), National Natural Science Foundation of China (82373233 to T. Shi) and Key Research and Development Project of Hainan Provincial Science and Technology Department (ZDYF2021SHFZ056 to T. Shi).
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W. Tao: Conceptualization, data curation, formal analysis, visualization, investigation, methodology, writing-original draft, writing-review and editing. Y. Dong: Data curation, investigation, and methodology. S. Zuo: Formal analysis, investigation, methodology. H. Wang: Investigation and methodology. Q. Liang: Formal analysis and investigation. T. Cai: Formal analysis and investigation. X. Chen: Investigation. W. Wei: Formal analysis. C. Zhang: Investigation. S. Tian: Investigation. C. Wang: Formal analysis. H. Li: Data curation and resources. B. Wang: Data curation and resources. X. Ma: Conceptualization, data curation, resources. Q. Huang: Conceptualization, data curation, resources. T. Shi: Conceptualization, data curation, funding acquisition. Y. Huang: Conceptualization, data curation, formal analysis, investigation, funding acquisition, resources, supervision, project administration, writing-review and editing. X. Zhang: Conceptualization, data curation, formal analysis, investigation, funding acquisition, resources, supervision, project administration and writing-review.
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Ethical approval for the animal experiments was obtained from the Ethics Committee of the Chinese People’s Liberation Army (PLA) General Hospital. The collection of human tissues was approved by the Ethics and Research Committee of the Chinese PLA General Hospital and written informed consent was obtained from the patients before surgery.
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Tao, W., Dong, Y., Zuo, S. et al. DR5/WDR12 balances p65 stability promoting sunitinib resistance in renal cell carcinoma. Cell Death Differ (2026). https://doi.org/10.1038/s41418-026-01723-8
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DOI: https://doi.org/10.1038/s41418-026-01723-8


