Miransertib(ARQ-092) is an orally bioavailable, selective, and potent allosteric Akt inhibitor with IC50s of 2.7 nM, 14 nM and 8.1 nM for Akt1, Akt2, Akt3, respectively.
In vitro: ARQ-092 demonstrates high enzymatic potency against Akt1, Akt2 and Akt3, as well as potent cellular inhibition of Akt activation and the phosphorylation of the downstream target PRAS40. ARQ-092 shows strong affinity for un-phosphorylated fulllength Akt1 and potently inhibited the phosphorylated form of full-length Akt isoforms. In a large panel of cell lines derived from various tumor types, ARQ-092 shows potent anti-proliferative activity in cell lines containing PIK3CA/PIK3R1 mutations compared to those with wild-type (wt) PIK3CA/PIK3R1 or PTEN loss. ARQ-092 shows excellent inhibition of p-Akt (S473) and p-Akt (T308) in both AN3CA and A2780 cells.
In vivo: ARQ-092 (po at 100 mg/kg, iv at 5 mg/kg) in a mouse pharmacokinetic study shows an oral bioavailability of 23%. ARQ-092 results in 99%, 95% and 58% reductions in p-Akt (S473), p-Akt (T306) and p-PRAS40 (T246), respectively, after tumor-bearing mice are treated with 100 mg/kg po. The inhibition of phosphorylation is sustained at eight hours. The plasma concentration of ARQ-092 at one hour is 2.1 μM and decreased to 0.26 μM at 8 hours, while in the tumor, the concentration is 21.0 μM at one hour and 9.6 μM at 8 hours. Treatment of the SHP2Y279C/+ mice with ARQ-092 normalizes the hypertrophic cardiomyopathy (HCM) phenotype as early as 2 weeks following treatment, with levels comparable to those in SHP2+/+ at this time point.
|Cell lines||AN3CA and A2780 cells|
|Preparation method||AN3CA and A2780 cells are obtained from the ATCC. AN3CA cells are cultured in DMEM, and A2780 cells are cultured in RPMI supplemented with 10% FBS, 100 units/mL Penicillin, 100 μg/mL Streptomycin, and 2 mM Glutamine at 37 °C under 5% CO2. Cells are plated in 96-well plates at 2,000-10,000 cells/well, cultured for 24 h, and treated with the test compound for 72 h at a final DMSO concentration no greater than 0.5% v/v. PMS stock reagent (0.92 mg/mL in DPBS) is diluted 20-fold in MTS stock reagent (2 mg/mL in DPBS), and this MTS/PMS mixture is diluted 5-fold into each well of the 96-well plate. The plates are incubated for 3-4 h, and the absorbance of formazan is measured at 490 nm. The data are normalized to the untreated controls, the dose-response curves are fit to a four-parameter logistic equation, and the IC50 values are determined. All IC50 values reported are the geometric mean of at least two independent determinations.|
|Concentrations||final DMSO concentration no greater than 0.5% v/v|
|Incubation time||72 h|
|Animal models||SHP2Y279C/+ mice|
|Formulation||dissolved in 0.01 M phosphoric acid (vehicle) at a concentration of 20 mg/mL and filter sterilized|
|Dosages||100 mg/kg body weight|
|Body Surface Area (m2)||0.007||0.025||0.15||0.05||0.02||0.5|
|Animal A (mg/kg) = Animal B (mg/kg) multiplied by||Animal B Km|
|Animal A Km|
For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.
|Solubility||DMSO: ≥ 35 mg/mL|
In vivo efficacy of the AKT inhibitor ARQ 092 in Noonan Syndrome with multiple lentigines-associated hypertrophic cardiomyopathy.
Wang J, et al. PLoS One. 2017 Jun 5;12(6):e0178905. PMID: 28582432.
Discovery of 3-(3-(4-(1-Aminocyclobutyl)phenyl)-5-phenyl-3H-imidazo[4,5-b]pyridin-2-yl)pyridin-2-amine (ARQ 092): An Orally Bioavailable, Selective, and Potent Allosteric AKT Inhibitor.
Lapierre JM, et al. J Med Chem. 2016 Jul 14;59(13):6455-69. PMID: 27305487.
Repression of AKT signaling by ARQ 092 in cells and tissues from patients with Proteus syndrome.
Lindhurst MJ, et al. Sci Rep. 2015 Dec 11;5:17162. PMID: 26657992.
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