Molecular Weight(MW): 430.84
ARS-1620 is a potent, orally bioavailable covalent inhibitor of KRASG12C and could achieve rapid and sustained in vivo target occupancy to induce tumor regression.
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|Description||ARS-1620 is a potent, orally bioavailable covalent inhibitor of KRASG12C and could achieve rapid and sustained in vivo target occupancy to induce tumor regression.|
ARS-1620 covalently inhibits KRAS (G12C) activity with high potency and atropisomeric selectivity in p.G12C mutant cancer cells. ARS-1620 rapidly engaged G12C in a concentration- and time- dependent manner consistent with its covalent mechanism of inhibition. Across a panel of cell lines harboring the mutant allele, ARS-1620 exhibited a half maximal G12C target engagement (TE50) at ~0.3 μM and near complete engagement at 3.0 μM after 2 hr of treatment. RS-1620 inhibits RAS-GTP and the phosphorylation of MEK, ERK, RSK, S6, and AKT in a dose-dependent and selective manner in H358 (p.G12C) but not in negative control lung cancer cell lines lacking p.G12C (A549, H460, and H441). ARS-1620 elicits sub-micromolar allele-specific potency (IC50 = 0.3 μM; IC90 = 1 μM). The activity of ARS-1620 is specific to the G12C allele and mediated by the covalent modification of Cys-12.
ARS-1620 exhibits excellent oral bioavailability (F > 60%) in mice. In MIA-PaCa2 xenografts (p.G12C), ARS-1620 significantly inhibits tumor growth (p < 0.001) in a dose-dependent manner with marked regression at a dose of 200 mg/kg, given once daily. Xenografts of H441 (p.G12V) lack a response at all doses tested and the R-atropisomer of ARS-1620 lacks activity in both models. ARS-1620 selectively induces tumor regression in patient-derived tumor models (harboring KRAS p.G12C).
|In vitro||DMSO||86 mg/mL (199.61 mM)|
|Ethanol||60 mg/mL (139.26 mM)|
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