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CRA-026440

CAS No. : 847460-34-8

MCE 站：CRA-026440

产品活性：CRA-026440 是一种有效的广谱 HDAC 抑制剂。作用于 HDAC1，HDAC2，HDAC3，HDAC6，HDAC8 和 HDAC10 的 K_i 分别为 4，14，11，15，7 和 20 nM。

研究领域：Cell Cycle/DNA Damage  |  Epigenetics

作用靶点：HDAC

In Vitro: CRA-026440 inhibits pure recombinant isozymes HDAC1, HDAC2, HDAC3/SMRT, HDAC6, HDAC8, and HDAC10 in the nanomolar range. Treatment of cultured tumor cell lines grown in vitro with CRA-026440 results in the accumulation of acetylated histone and acetylated tubulin, leading to an inhibition of tumor cell growth and the induction of apoptosis. To determine if HDAC inhibition by CRA-026440 affects the proliferation of tumor cells, a panel of human tumor cell lines is treated in vitro at various concentrations of inhibitor. Antitumor activity is observed in all 10 tumor cell lines tested, with GI₅₀ values ranging from 0.12 to 9.95 μM. In addition, CRA-026440 has antiproliferative effect on HUVEC endothelial cells with a GI₅₀ value of 1.41 μM.

In Vivo: CRA-026440 parenterally given to mice harboring HCT116 or U937 human tumor xenografts results in a statistically significant reduction in tumor growth. CRA-026440 is delivered i.v. to mice, and plasma concentrations are monitored over time. Based on these data, the clearance is calculated to be 38 mL/min/kg; the volume of distribution in the central compartment is 67 mL/kg. The steady-state volume of distribution is 454 mL/kg. The predominant plasma half-life is 7 minutes (44% of area under the curve); and the mean residence time is 12 minutes. One notable finding is that CRA-026440 has a different pharmacokinetic profile in tumor. It has a lower C_max, but the compound concentration is maintained more steadily over time, probably due to the compound's large volume of distribution. CRA-026440 at 25 and 50 mg/kg given qdx3 per week significantly inhibits tumor growth at 40% (P<0.01) and 58% (P<0.01), respectively. The combination of Avastin at 25 mg/kg once a week and CRA-026440 at 25 and 50 mg/kg for three consecutive days per week lead to more profound tumor growth inhibition of 84% (P< 0.01) and 85% (P<0.01), respectively. Compared with Avastin alone, the combination yields a marginally better result (P<0.1). The combination of Avastin and CRA-026440 at 50 mg/kg is significantly better than CRA-026440 alone at 50 mg/kg (P<0.05). Both combination treatments are well tolerated with maximal weight loss <3%.

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