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Design, Synthesis and Biological Evaluation of Novel Rapamycin Benzothiazole Hybrids as mTOR Targeted Anti-cancer Agents.

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Design, Synthesis and Biological Evaluation of Novel Rapamycin Benzothiazole Hybrids as mTOR Targeted Anti-cancer Agents.

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作者
Xie Lijun;Huang Jie;Chen Xiaoming;Yu Hui;Li Kualiang;Yang Dan;Chen Xiaqin;Ying Jiayin;Pan Fusheng;Lv Youbing;Cheng Yuanrong*
刊物名称
Chemical & pharmaceutical bulletin
2016
64
4
346-355

{Author}: Xie Lijun;Huang Jie;Chen Xiaoming;Yu Hui;Li Kualiang;Yang Dan;Chen Xiaqin;Ying Jiayin;Pan Fusheng;Lv Youbing;Cheng Yuanrong*

{Journal}: Chemical & pharmaceutical bulletin

{Year}: 2016

{Volume}: 64

{Issue}: 4

{Pages}: 346-355

{Abstract}: The immunosuppressant drug rapamycin, was firstly identified as a mammalian target of rapamycin (mTOR) allosteric inhibitor, and its derivatives have been successfully developed as anti-cancer drugs. Therefore, finding rapamycin derivatives with better anti-cancer activity has been proved to be an effective way to discover new targeted anti-cancer drugs. In this paper, structure modification was performed at the C-43 position of rapamycin using bioisosterism and a hybrid approach: a series of novel rapamycin-benzothiazole hybrids 4a-e, 5a-c, and 9a, b have been designed, synthesized and evaluated for their anti-cancer activity against Caski, CNE-2, SGC-7901, PC-3, SK-NEP-1 and A-375 human cancer cell lines. Some of these compounds (4a-e, 9a, b) displayed good to excellent potency against the Caski and SK-NEP-1 cell line as compared with rapamycin. Compound 9b as the most active compound showed IC50 values of 8.3 (Caski) and 9.6 μM (SK-NEP-1), respectively. In addition, research on the mechanism showed that 9b was able to cause G1 phase arrest and induce apoptosis in the Caski cell line. Most importantly, it significantly decreased the phosphorylation of S6 ribosomal protein, p70S6K1 and 4EBP1, which indicated that 9b inhibited the cancer cell growth by blocking the mTOR pathway and may have the potential to become a new mTOR inhibitor.

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