GSK3 beta-Mediated Expression of CUG-Translated WT1 Is Critical for Tumor Progressionopen access
- Yoshitomi, Hisae; Lee, Kun Y.; Yao, Ke; Shin, Seung Ho; Zhang, Tianshun; Wang, Qiushi; Paul, Souren; Roh, Eunmiri; Ryu, Joohyun; Chen, Hanyong; Aziz, Faisal; Chakraborty, Abhijit; Bode, Ann M.; Dong, Zigang
- Issue Date
- AMER ASSOC CANCER RESEARCH
- CANCER RESEARCH, v.81, no.4, pp.945 - 955
- Journal Title
- CANCER RESEARCH
- Start Page
- End Page
- The Wilms' tumor 1 (WT1) gene is well known as a chameleon gene. It plays a role as a tumor suppressor in Wilms' tumor but also acts as an oncogene in other cancers. Previously, our group reported that a canonical AUG starting site for the WT1 protein (augWT1) acts as a tumor suppressor, whereas a CUG starting site for the WT1 protein (cugWT1) functions as an oncogene. In this study, we report an oncogenic role of cugWT1 in the AOM/DSS-induced colon cancer mouse model and in a urethane-induced lung cancer model in mice lacking cugWT1. Development of chemically-induced tumors was significantly depressed in cugWT1-deficient mice. Moreover, glycogen synthase kinase 3 beta promoted phosphorylation of cugWT1 at S64, resulting in ubiquitination and degradation of the cugWT1 associated with the F-box(-/-) WD repeat-containing protein 8. Overall, our findings suggest that inhibition of cugWT1 expression provides a potential candidate target for therapy. Significance These findings demonstrate that CUG-translated WT1 plays an oncogenic role in vivo, and GSK3 beta-mediated phosphorylation of cugWT1 induces its ubiquitination and degradation in concert with FBXW8.
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- 자연과학대학 > 식품영양학과 > Journal Articles
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