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USP37 directly deubiquitinates and stabilizes c-Myc in lung cancer.
- Source :
-
Oncogene . 7/23/2015, Vol. 34 Issue 30, p3957-3967. 11p. 1 Color Photograph, 2 Black and White Photographs, 1 Chart, 3 Graphs. - Publication Year :
- 2015
-
Abstract
- The oncoprotein c-Myc is frequently overexpressed in many cancers and is essential for cancer cell proliferation. Ubiquitin-proteasome-dependent degradation is one of the main ways in which cells control c-Myc abundance at a post-translational level. However, the underlying mechanism by which c-Myc is directly deubiquitinated is not fully understood. In this study, by screening ubiquitin-specific proteases (USPs) that may regulate c-Myc stability, we identified USP37 as a novel deubiquitinating enzyme (DUB) that stabilizes c-Myc via direct binding. The overexpression of USP37 markedly increases c-Myc abundance by blocking its degradation, whereas the depletion of USP37 promotes c-Myc degradation and reduces c-Myc levels. Further studies indicate that USP37 directly interacts with c-Myc and deubiquitinates c-Myc in a DUB activity-dependent manner. Functionally, USP37 regulates cell proliferation and the Warburg effect by regulating c-Myc levels. Clinically, USP37 is significantly upregulated in human lung cancer tissues, where its expression is positively correlated with c-Myc protein expression. Thus, our findings uncover a previously unrecognized role for USP37 in the regulation of c-Myc stability in lung cancer and suggest that USP37 might be a potential therapeutic target for the treatment of lung cancer. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09509232
- Volume :
- 34
- Issue :
- 30
- Database :
- Academic Search Index
- Journal :
- Oncogene
- Publication Type :
- Academic Journal
- Accession number :
- 108483346
- Full Text :
- https://doi.org/10.1038/onc.2014.327