Blockage of Neddylation Modification Stimulates Tumor Sphere Formation
Blockage of neddylation modification stimulates tumor PNAS PLUS sphere formation in vitro and stem cell differentiation and wound healing in vivo Xiaochen Zhoua,b,1, Mingjia Tanb,1, Mukesh K. Nyatib, Yongchao Zhaoc,d, Gongxian Wanga,2, and Yi Sunb,c,e,2 aDepartment of Urology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China; bDivision of Radiation and Cancer Biology, Department of Radiation Oncology, University of Michigan, Ann Arbor, MI 48109; cInstitute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310029, China; dKey Laboratory of Combined Multi-Organ Transplantation, Ministry of Public Health, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; and eCollaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou 310058, China Edited by Vishva M. Dixit, Genentech, San Francisco, CA, and approved March 10, 2016 (received for review November 13, 2015) MLN4924, also known as pevonedistat, is the first-in-class inhibitor acting alone or in combination with current chemotherapy of NEDD8-activating enzyme, which blocks the entire neddylation and/or radiation (6, 11). One of the seven clinical trials of MLN4924 modification of proteins. Previous preclinical studies and current (NCT00911066) was published recently, concluding a modest effect clinical trials have been exclusively focused on its anticancer property. of MLN4924 against acute myeloid leukemia (AML) (12). Unexpectedly, we show here, to our knowledge for the first time, To further elucidate the role of blocking neddylation in cancer that MLN4924, when applied at nanomolar concentrations, signif- treatment, we thought to study the effect of MLN4924 on cancer icantly stimulates in vitro tumor sphere formation and in vivo stem cells (CSCs) or tumor-initiating cells (TICs), a small group tumorigenesis and differentiation of human cancer cells and mouse of tumor cells with stem cell properties that have been claimed to embryonic stem cells.
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