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Ref Type Journal Article
PMID (29282301)
Authors Gu L, Zhang H, Liu T, Draganov A, Yi S, Wang B, Zhou M
Title Inhibition of MDM2 by a Rhein-Derived Compound AQ-101 Suppresses Cancer Development in SCID Mice.
Journal Vol Issue Date Pages Journal Short Title
Molecular cancer therapeutics 17 2 2018 02 497-507 Mol Cancer Ther
URL
Abstract Text A novel small-molecule anthraquinone (AQ) analogue, AQ-101, which was synthesized through chemical modification of the core structures of rhein, exhibited potent anticancer activity. In the present study, we evaluated the cancer-inhibiting mechanism of AQ-101 and tested the therapeutic potential of this compound for treating cancer in mice. We found that AQ-101 was able to induce MDM2 protein degradation through a self-ubiquitination and proteasome-mediated mechanism. This AQ-101-induced MDM2 downregulation led to activation of p53, which contributed to apoptosis of acute lymphoblastic leukemia (ALL), especially those with a wild-type p53 phenotype and MDM2 expression in vitro and in vivo When given for a period of 2 weeks (20 mg/kg/day, 3×/week), AQ-101 inhibited development of ALL in nude or SCID mice with a human ALL xenograft and achieved cure by the end of the 5-month experiment. Importantly, AQ-101 showed minimal or no inhibitory effect on normal human hematopoiesis in vitro and was well tolerated in vivo in animal models. Given that MDM2-overexpressing cancers are commonly refractory to current treatment options, our study results suggest that further development of AQ-101 is warranted, as it represents a potentially new, safe anticancer drug with a novel strategy for targeting MDM2. Mol Cancer Ther; 17(2); 497-507. ©2017 AACR.

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