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http://dx.doi.org/10.4196/kjpp.2016.20.2.161

CRM1 inhibitor S109 suppresses cell proliferation and induces cell cycle arrest in renal cancer cells  

Liu, Xuejiao (Institute of Nervous System Diseases, Xuzhou Medical College)
Chong, Yulong (Institute of Nervous System Diseases, Xuzhou Medical College)
Liu, Huize (Institute of Nervous System Diseases, Xuzhou Medical College)
Han, Yan (Dalian Center for Disease Control and Prevention)
Niu, Mingshan (Blood Disease Institute, Xuzhou Medical College)
Publication Information
The Korean Journal of Physiology and Pharmacology / v.20, no.2, 2016 , pp. 161-168 More about this Journal
Abstract
Abnormal localization of tumor suppressor proteins is a common feature of renal cancer. Nuclear export of these tumor suppressor proteins is mediated by chromosome region maintenance-1 (CRM1). Here, we investigated the antitumor effects of a novel reversible inhibitor of CRM1 on renal cancer cells. We found that S109 inhibits the CRM1-mediated nuclear export of RanBP1 and reduces protein levels of CRM1. Furthermore, the inhibitory effects of S109 on CRM1 is reversible. Our data demonstrated that S109 significantly inhibits proliferation and colony formation of renal cancer cells. Cell cycle assay showed that S109 induced G1-phase arrest, followed by the reduction of Cyclin D1 and increased expression of p53 and p21. We also found that S109 induces nuclear accumulation of tumor suppressor proteins, Foxo1 and p27. Most importantly, mutation of CRM1 at Cys528 position abolished the effects of S109. Taken together, our results indicate that CRM1 is a therapeutic target in renal cancer and the novel reversible CRM1 inhibitor S109 can act as a promising candidate for renal cancer therapy.
Keywords
Cell cycle; CRM1; Nuclear export; Renal cancer; S109;
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