ARS-853 (ARS853)

Catalog No.S8156

ARS-853 (ARS853) Chemical Structure

Molecular Weight(MW): 432.94

ARS-853 is a selective, covalent KRAS(G12C) inhibitor that inhibits mutant KRAS-driven signaling by binding to the GDP-bound oncoprotein and preventing activation.

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Biological Activity

Description ARS-853 is a selective, covalent KRAS(G12C) inhibitor that inhibits mutant KRAS-driven signaling by binding to the GDP-bound oncoprotein and preventing activation.
Targets
K-Ras(G12C) [2]
(in H358 cells)
2.5 μM
In vitro

ARS-853 treatment of KRASG12C cells led to a dose-dependent and nearly complete inhibition of CRAF-RBD (RBD)-mediated pulldown of KRAS from lysates, with an IC50 of approximately 1 μmol/L. Treatment of H358 cells by ARS-853 resulted in a significant loss of KRAS–CRAF interactions. Consistent with an inactive state of KRASG12C once bound to ARS-853, downstream signaling through both MAPK (including pMEK, pERK, and pRSK) and PI3K signaling (pAKT) pathways was inhibited by ARS-853 in H358 and other KRASG12C cell lines. The inhibition of RAF-RBD pulldown and KRAS downstream signaling was sustained over a period of 72 hours, accompanied by G1 cell-cycle arrest, loss of Cyclin D1 and Rb expression, and an increase in the cell-cycle inhibitor p27 KIP1. In addition, hallmarks of apoptosis, including cleaved PARP and increases in sub-diploid DNA, were observed in H358 cells following treatment with ARS-853. No effects on RAF-RBD binding or downstream signaling were observed in A549 cells (KRASG12S), and the inhibitory effects of ARS-853 in H358 cells could be rescued by ectopic expression of KRASG12V. KRASG12C is the most potent covalent target of ARS-853 across more than 2,700 cellular proteins and consistently find that this compound exerts no effects on cellular signaling or growth in non-KRASG12C cells at concentrations up to 10-fold higher than its KRASG12C potency. ARS-853 reacts only with the inactive (GDP-bound), but the not the active (GTP-bound), state of KRAS[1]. ARS853 reduced KRAS-GTP levels and ERK phosphorylation in human embryonic kidney 293 (HEK293) or H358 cells engineered to express KRASG12C but not in those expressing KRASG12C/A59G. ARS853 traps KRASG12C in a GDP-bound conformation by lowering its affinity for nucleotide exchange factors[2].

Protocol

Cell Research:

[2]

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  • Cell lines: H358 (G12C) cells
  • Concentrations: 0.05, 0.1, 0.5, 1, 5, 10, 50 μM
  • Incubation Time: 5 h
  • Method:

    KRASG12C mutant cells (H358) were treated with ARS853 for 5 hours. The effect on the level of active, or GTP-bound, KRAS was determined by a RAS-binding domain pull-down (RBD:PD) assay and immunoblotting with a KRAS-specific antibody. 


    (Only for Reference)

Solubility (25°C)

In vitro DMSO 86 mg/mL warmed (198.64 mM)
Ethanol 1 mg/mL warmed (2.3 mM)
Water Insoluble

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 432.94
Formula

C22H29ClN4O3

CAS No. 1629268-00-3
Storage powder
in solvent
Synonyms N/A

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Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

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Rho Signaling Pathway Map

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID