Zibotentan (ZD4054)
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产品名称:Zibotentan (ZD4054)CAS:186497-07-4别名：N-(3-甲氧基-5-甲基-2-吡嗪基)-2-[4-(1,3,4-恶二唑-2-基)苯基]-3-吡啶磺酰胺;2-(4-(1,3,4-噁二唑-2-基)苯基)-N-(3-甲氧基-5-甲基吡嗪-2-基)吡啶-3-磺酰胺;ZIBOTENTAN(ZD4054);ZD4054;ZD-4054;ZD4054;ZIBOTENTAN(ZD4054)250MG英文名：Zibotentan (ZD4054)
[] - 生物活性Zibotentan (ZD4054)是一种特异性的Endothelin (ET)A拮抗剂，IC50为21 nM，对ETB没有抑制活性。Phase 3。
- 体外研究As Zibotentan specifically inhibits ETA-mediated antiapoptotic effects, but not ETB-mediated proapoptotic effects in human and rat smooth muscle cells, Zibotentan binds to endothelin A receptor (ETA) with high affinity with Ki of 13 nM, and has no affinity for endothelin B receptor (ETB) with IC50 of >10 μM. Zibotentan treatment at 1 μM inhibits ET-1 induced mitogenic activity in ovarian carcinoma cell lines HEY and OVCA 433 secreting ET-1 and expressing ETA and ETB mRNA. ZD4054 (1 μM) inhibits ET-1 induced EGFR transactivation in HEY and OVCA 433 cells. Zibotentan (1 μM) reverts ET-1 mediated epithelial-mesenchymal transition (EMT), by enhancing E-cadherin expression and promoter activity, and inhibiting vascular endothelial growth factor (VEGF) secretion and invasiveness in HEY and OVCA 433 cells. Zibotentan also potently inhibits the basal and ET-1 induced cell proliferation in SKOV-3 and A-2780 cells, associated with the inhibition of AKT and p42/44MAPK phosphorylation, and with increased apoptosis through the inhibition of bcl-2 and activation of caspase-3 and poly(ADP-ribose) polymerase proteins.
- 体内研究Administration of Zibotentan at 10 mg/kg/day for 21 days potently inhibits the growth of HEY ovarian carcinoma xenografts in mice by 69% with no associated toxicity, which is in association with the blocking of cell proliferation evaluated by 37% inhibition of the Ki-67 expression, and the 62% inhibition of tumor-induced vascularization. Consistently, Zibotentan treatment significantly inhibits the expression of matrix metalloproteinase-2 (MMP-2) and VEGF, as well as the activation of p42/44 MAPK and EGFR, and potently enhances the expression of E-cadherin.
