RHPS4 is a potent telomerase inhibitor (IC50 = 0.33 μM). RHPS4 is a DNA damage inducer.
IC50&Target
IC50: 0.33 μM (telomerase in the TRAP assay).
体外研究
RHPS4 could sensitize tumor cells to anticancer agents that act via disparate mechanisms.
RHPS4 (0.5-1 μM, 15 days) induces a senescent-like growth arrest in MCF-7 cells.
RHPS4 (1 μM, 4 days) induces phosphorylation of H2AX in transformed and tumor cells.
Cell Proliferation Assay
Cell Line:
MCF-7, MCF-7 vector control, and MCF-7 c81 cells.
Concentration:
0, 0.2, 0.5, or 1 μM.
Incubation Time:
7 days.
Result:
Inhibited cell proliferation.
体内研究
RHPS4 (15 mg/kg, iv, 15 days) treatment produces a marked inhibition of tumor weight (tumor weight inhibition [TWI] about 80%; P < 0.001) in a very short time, and this effect persists for at least 30 days. A complete tumor response is observed in 80% of mice, and 40% are cured.
In all the other tumor xenografts, RHPS4 treatment produces about 50% (P < 0.001) TWI at the nadir of the effect and, more important, results in a delay of tumor growth of about 15 (M14 and PC3) and 10 (HT29 and H460) days.
Animal Model:
CD-1 male nude (nu/nu) mice, 6–8 weeks old and weighing 22-24 g (H460, CG5 and HT29, PC3 and M14 cancer models).
Dosage:
15 mg/kg.
Administration:
IV, daily for 15 consecutive days.
Result:
Active as a single agent on all the tumors analyzed. CG5 breast xenografts resulted in the most sensitive tumor.
分子式
C23H20F2N2O4S
分子量
458.48
CAS号
390362-78-4
运输条件
Room temperature in continental US; may vary elsewhere.
储存方式
Powder
-20°C
3 years
4°C
2 years
In solvent
-80°C
6 months
-20°C
1 month
溶解性数据
In Vitro:
DMSO : 1 mg/mL (2.18 mM; ultrasonic and warming and heat to 60°C)