HZ08 reverse the aneuploidy-induced cisplatin-resistance in Gastric cancer by modulating the p53 pathway.
HZ08 reverse the aneuploidy-induced cisplatin-resistance in Gastric cancer by modulating the p53 pathway.
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DOI：
10.1016/j.ejphar.2013.10.045
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发表时间：
2013-11
影响因子：
5
通讯作者：
Xuzhen Tang;G. Hu;Chun-Hua Xu;K. Ouyang;W. Fang;Wen-long Huang;Jingjing Zhang;Fu Li;Ke Wang;X. Qin;Yunman Li
中科院分区：
文献类型：
--
作者：
Xuzhen Tang;G. Hu;Chun-Hua Xu;K. Ouyang;W. Fang;Wen-long Huang;Jingjing Zhang;Fu Li;Ke Wang;X. Qin;Yunman Li
We evaluated the influence of DNA aneuploidy on chemotherapy-resistance in human Gastric cancer cell MKN45; we also evaluated the reversal effects of HZ08 on these cells and then preliminary investigated the possible involved pathway. We made use of a pair of human Gastric cancer cell dip-MKN45 (diploid MKN45) and aneu-MKN45 (aneuploid MKN45). Growth inhibition in response to chemotherapeutic drugs was evaluated by CellTiter-Glo Luminescent Cell Viability assay and clone formation assay. Flow cytometry and immuno-assay were applied to evaluate apoptosis and the expression of relative signaling molecules. MKN45 xenograft was generated to evaluatein vivoaction. Aneu-MKN45 developed a resistance to cisplatin which could be reversed by HZ08; Flow cytometry and western-blot indicates that HZ08-combination could induce apoptosis and increase the expression of apoptosis-related biomarkers on aneu-MKN45;in vivostudy also reflect the same correlation between aneuploidy and cisplatin-resistance, which could be antagonized by HZ08 combination; When investigating the involved pathway, in anue-MKN45, the expression of molecules in p53 pathway was decreased; HZ08 could increase the expression of p53 down-stream molecules as well as elevate the activity of p53, while inhibiting Mdm2, the major negative regulator of p53; p53 inhibitor Pifithrin-α could completely abrogate HZ08's synergism effects, and mimic cisplatin-resistance on dip-MKN45.Lower p53 pathway expression that attenuates cisplatin-induced apoptosis might be at least partly the reason of cisplatin-resistance occurred in aneuploid MKN45 bothin vitroandin vivo; Combination of HZ08 could sensitize cisplatin-induced apoptosis through the activation of the p53 pathway, therefore represented a synergism effect on aneuploid MKN45 cells.
