Abstract
Recent studies indicated that the androgen receptor (AR) plays important roles in modulating metastasis of VHL-mutant clear cell renal cell carcinoma (ccRCC). However, the precise mechanisms of AR roles in VHL wild-type (VHL-wt) ccRCC, remain unclear. Here we found that AR interacted with VHL to modulate the metastasis of VHL-wt ccRCC via an oxygen-dependent manner. Mechanism dissection revealed that AR could transcriptionally suppress the miR-185-5p expression in the presence of functional VHL-wt protein under a normoxic condition, which might then result in increasing the expression of VEGF-A and VEGF-C via targeting the 3′UTR of mRNAs at a post-transcriptional level. In contrast, under a hypoxic condition, AR could increase miR-185-5p expression to suppress VEGF-C expression, yet this miR-185-5p effect on VEGF-A was reversed via AR’s positive regulation on the HIF2α-increased VEGF-A expression that resulted in increasing VEGF-A in the VHL-wt RCC cells. These distinct AR functions under different oxygen conditions may involve the VHL-impacted ubiquitination and nuclear localization of AR. The differential regulation of VEGF-A vs VEGF-C by AR may then result in differential impacts on the ccRCC metastatic destinations of VHL-wt ccRCC cells under different oxygen conditions. These finer mechanisms may help in the development of a novel therapy to better suppress the ccRCC progression under different oxygenization conditions.
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This work was supported by George Whipple Professorship Endowment, and Beijing Natural Science Foundation (No. 7194319), and National Nature Science Foundation (No. 81972389).
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Huang, Q., Sun, Y., Zhai, W. et al. Androgen receptor modulates metastatic routes of VHL wild-type clear cell renal cell carcinoma in an oxygen-dependent manner. Oncogene 39, 6677–6691 (2020). https://doi.org/10.1038/s41388-020-01455-0
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DOI: https://doi.org/10.1038/s41388-020-01455-0