2-Methoxy-5((3,4,5-trimethosyphenyl)seleninyl) phenol inhibits MDM2 and induces apoptosis in breast cancer cells through a p53-independent pathway

作者: Zengqiang Li , Daiying Zuo , Weige Zhang , Yingliang Wu , Jingwen Xu

DOI: 10.1016/J.CANLET.2016.09.011

关键词: Breast cancerMdm2Combretastatin A-4Cancer researchTranscription (biology)ApoptosisPhenolMutantCombretastatinPharmacologyBiology

摘要: 2-Methoxy-5((3,4,5-trimethosyphenyl)seleninyl) phenol (SQ) is a novel synthesized combretastatin A-4 (CA-4) analog that can be classified as microtubule inhibitor. Our previous study demonstrated SQ induced G2/M phase arrest and promoted apoptosis progression in breast cancer cells. In the present study, we found dissociated MDM2-p53 complex directly MDM2 degradation through ubiquitin-dependent proteasome pathway MCF-7 MDA-MB-231 cells. Further, p53 was activated by regulation of its transcription, translation, post-translation modification. More specifically, caspase-dependent but p53-independent apoptosis, this associated with inhibition MDM2. We also showed exhibited superior in vivo efficacy low toxicity than CA-4. The immunofluorescence histochemistry indicated inhibited expression in vivo. summary, report for first time shows excellent anti-breast activity in vitro induces which inhibition. Therefore, compound has potential therapeutic treatment both wild-type mutant cancer.

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