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Ixazomib

CAS No. : 1072833-77-2

MCE 站：Ixazomib

产品活性：Ixazomib (MLN2238) 是一种有效的选择性的可逆蛋白酶体 (proteasome)抑制剂，抑制20S蛋白酶体的糜蛋白酶样蛋白水解 (β5) 位点，IC₅₀ 为 3.4 nM，K_i 为 0.93 nM。

研究领域：Metabolic Enzyme/Protease  |  Autophagy

作用靶点：Proteasome  |  Autophagy

In Vitro: Ixazomib (MLN2238) is an N-capped dipeptidyl leucine boronic acid and preferentially bound to and inhibited the chymotrypsin-like proteolytic (β5) site of the 20S proteasome with an IC₅₀ value of 3.4 nM (K_i of 0.93 nM). At higher concentrations, Ixazomib (MLN2238) also inhibits the caspase-like (β1) and trypsin-like (β2) proteolytic sites (IC₅₀ of 31 and 3,500 nM, respectively). Cell viability studies are performed in a variety of mammalian cell lines to compare the in vitro antiproliferative effects of Ixazomib (MLN2238) with Bortezomib. Studies performed with A375 (lung), H460 (lung), HCT-116 (colon), and HT-29 (colon) cells revealed similar LD₅₀ values for the two compounds, which range from 4 to 58 nM.

In Vivo: Ixazomib (MLN2238) shows antitumor activity in the CWR22 xenograft model. The antitumor effects of Ixazomib (MLN2238) dosed at 14 mg/kg i.v. or 7 mg/kg i.v. are compared with Bortezomib dosed at 0.8 mg/kg i.v. or 0.4 mg/kg i.v. on a twice weekly regimen. The high dose for both Ixazomib (MLN2238) and Bortezomib shows similar antitumor activity in this model (T/C=0.36 and 0.44, respectively). However, Ixazomib (MLN2238) (7 mg/kg) shows greater efficacy at a 0.5 MTD dose compared with a 0.5 MTD dose of Bortezomib (0.4 mg/kg; T/C=0.49 compared with T/C=0.79, respectively) Ixazomib (MLN2238) shows time-dependent reversible proteasome inhibition; however, the proteasome dissociation half-life (t_1/2) for Ixazomib (MLN2238) is determined to be 18 minutes.

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