Abstract
The most notable progress in renal clear cell carcinoma (ccRCC) in the past decades is the introduction of drugs targeting the VHL-HIF signaling pathway-associated angiogenesis. However, mechanisms underlying the development of VHL mutation-independent ccRCC are unclear. Here we provide evidence that the disrupted Hippo-YAP signaling contributes to the development of ccRCC independent of VHL alteration. We found that YAP1 and its primary target genes are frequently upregulated in ccRCC and the upregulation of these genes is associated with unfavorable patient outcomes. Research results derived from our in vitro and in vivo experimental models demonstrated that, under normoxic conditions, hyperactivated YAP1 drives the expression of FGFs to stimulate the proliferation of tumor and tumor-associated endothelial cells in an autocrine/paracrine manner. When rapidly growing cancer cells create a hypoxic environment, hyperactivated YAP1 in cancer cells induces the production of VEGF, which promotes the angiogenesis of tumor-associated endothelial cells, leading to improved tumor microenvironment and continuous tumor growth. Our study indicates that hyperactivated YAP1 is essential for maintaining ccRCC progression, and targeting the dual role of hyperactivated YAP1 represents a novel strategy to improve renal carcinoma therapy.
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Data availability
The raw and processed RNAseq data generated in this study have been deposited in the NCBI Gene Expression Omnibus (GEO) database under the accession number/code GSE290118. Other data supporting the findings of this study are available within the article and its supplementary information files.
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Acknowledgements
This work was partially supported by the National Cancer Institute/National Institute of Health (1R01CA197976, 1R01CA201500, and 5R01CA279385), University of Nebraska Medical Center Graduate student Fellowship, the Olson Center for Women’s Health (no number), The Fred & Pamela Buffett Cancer Center (Lb595), the Colleen’s Dream Foundation (no number), the Ruggles Family Foundation, VA Senior Research Career Scientist Award, IK6 BX005797, and the Vincent Memorial Hospital Foundation/Vincent Department of Obstetrics and Gynecology, Massachusetts General Hospital (No number).
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XL contributed to the conceptualization, experimental design and performance, data analysis, and manuscript preparation; JL contributed to RNA-seq, sequencing data analysis, and manuscript preparation; JR and KI contributed to cell culture, western blotting, tube formation, immunohistochemical analyses, and manuscript review; CH (Chunbo He) and GH, and C.H. (Cong Huang) contributed to viral package, 3D culture, tube formation assay, animal model development, and manuscript review. PC, HW, AD, XZ, DS, MM, SM, IM, ER., BC, LC, XC conducted real-time PCR and histological analyses and reviewed the manuscript. SY contributed to bioinformatics analysis; JSD contributed to data interpretation and manuscript review; CW supervised these studies and contributed to the conceptualization, experimental design, data analysis/interpretation, and manuscript preparation.
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Xenograft tumor mouse models were generated and used to examine the role of hyperactivated YAP1 oncoprotein in ccRCC progression. Mouse handling and all experimental procedures were approved by the Institutional Animal Care and Use Committee (IACUC) of the University of Nebraska Medical Center (UNMC) and Massachusetts General Hospital (MGH). No human subjects were involved in this study.
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Lv, X., Liu, J., Islam, K. et al. Hyperactivated YAP1 is essential for sustainable progression of renal clear cell carcinoma. Oncogene 44, 2142–2157 (2025). https://doi.org/10.1038/s41388-025-03354-8
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DOI: https://doi.org/10.1038/s41388-025-03354-8