Journal
CANCER CELL
Volume 25, Issue 4, Pages 455-468Publisher
CELL PRESS
DOI: 10.1016/j.ccr.2014.02.007
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Funding
- Ministry of Science and Technology (MOST) 973 Program [2011CB510101]
- National 863 High-Tech Foundation [2014AA020608]
- National Science Foundation of China (NSFC) [81101940]
- NSFC [91231112, 31171244, 81171902]
- Howard Hughes Medical Institute (HHMI) postdoctoral fellowship from the Damon Runyon Cancer Research Foundation [DRG 2021-9]
- National Research Service Award from the NIH
- ALSAC
- HHMI
- NIH [5R01GM069530, 5P30CA021765]
- CAS grant [CAS grant 09CF011001]
- MOST 973 Program [2011CB510101]
- Beijing Science Foundation [5102031]
- W.M. Keck Foundation
- United States National Institute of General Medical Sciences [P50GM081892]
- Chicago Community Trust from the Chicago Biomedical Consortium
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Hypoxic stress and hypoxia-inducible factors (HIFs) play important roles in a wide range of tumors. We demonstrate that SPOP, which encodes an E3 ubiquitin ligase component, is a direct transcriptional target of HIFs in clear cell renal cell carcinoma (ccRCC). Furthermore, hypoxia results in cytoplasmic accumulation of SPOP, which is sufficient to induce tumorigenesis. This tumorigenic activity occurs through the ubiquitination and degradation of multiple regulators of cellular proliferation and apoptosis, including the tumor suppressor PTEN, ERK phosphatases, the proapoptotic molecule Daxx, and the Hedgehog pathway transcription factor Gli2. Knockdown of SPOP specifically kills ccRCC cells, indicating that it may be a promising therapeutic target. Collectively, our results indicate that SPOP serves as a regulatory hub to promote ccRCC tumorigenesis.
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