Oleandrin (PBI-05204) inhibits the Na, K-ATPase activity with an IC50 of 620 nM.
IC50&Target
IC50: 620 nM (Na, K-ATPase).
体外研究
Study of Na,K-ATPase inhibition shows an IC50 (nM) of 620 for Oleandrin. The inhibition of Na,K-ATPase by Oleandrin confirms that it likely exert its toxic effect through inhibition of sodium pump activity. When treated with a series of concentrations of Oleandrin (0.2-25 nM), the undifferentiated CaCO-2 cells are sensitive as evidenced by an IC50 of 8.25 nM. In contrast, a maximum growth inhibition of only 20% is reached in differentiated CaCO-2 cells even though they are treated with Oleandrin concentrations as high as 25 nM.
体内研究
The effect of Oleandrin is investigated on glioma growth in vivo. To this aim, SCID or C57BL/6 mice are transplanted, respectively, with human U87MG (5×10), U251, GBM19 (5×10), or murine (syngeneic) GL261 (7.5×10) cells into the right striatum and, after 10 d, treated daily with intraperitoneal Oleandrin for an additional 7 d. Oleandrin significantly reduces tumor sizes in human and murine glioma cell models in vivo in a dose-dependent way. High concentrations of Oleandrin (3 mg/kg) are fatal in both models, as expected from the known lethal dose for rodents. Doses of Oleandrin below the lethal dose (0.3 mg/kg) significantly increase the survival time from 32.6±1.4 d to 53.8±9.6 d in mice injected with U87MG cells (n=5-11; p<0.01, log-rank test) and from 23.37±1.2 d to 34.38±3.3 d (n=5-11; p<0.01, log rank test) in mice injected with GL261 cells.
分子式
C32H48O9
分子量
576.72
CAS号
465-16-7
中文名称
欧夹竹桃苷;夹竹桃育齐墩果君欧莲素
运输条件
Room temperature in continental US; may vary elsewhere.