ASTX-029 Chemical Properties

Density 

1.387±0.06 g/cm3(Predicted)

storage temp. 

Store at -20°C

solubility 

DMSO: 250 mg/mL (428.05 mM)

form 

A crystalline solid

pka

13.39±0.46(Predicted)

InChI

InChI=1/C29H31ClFN5O5/c1-16(27(38)34-25(15-37)19-9-20(31)12-22(10-19)40-2)36-14-18-4-3-17(11-23(18)28(36)39)26-24(30)13-32-29(35-26)33-21-5-7-41-8-6-21/h3-4,9-13,16,21,25,37H,5-8,14-15H2,1-2H3,(H,34,38)(H,32,33,35)/t16-,25-/s3

InChIKey

BVRGQPJKSKKGIH-YZMAQOALNA-N

SMILES

O=C1N(CC2=CC=C(C3C(=CN=C(NC4CCOCC4)N=3)Cl)C=C12)[C@H](C)C(=O)N[C@@H](C1C=C(F)C=C(OC)C=1)CO |&1:24,29,r|

ASTX-029 Usage And Synthesis

Description

ASTX-029 is a highly potent and selective dual-mechanism ERK inhibitor discovered using fragment-based drug design. Because of its distinctive ERK-binding mode, ASTX-029 inhibits both ERK catalytic activity and the phosphorylation of ERK itself by MEK despite not directly inhibiting MEK activity. This dual mechanism was demonstrated in cell-free systems, cell lines and xenograft tumor tissue, where the phosphorylation of both ERK and its substrate, ribosomal S6 kinase (RSK), were modulated on treatment with ASTX-029. Markers of sensitivity were highlighted in a large cell panel, where ASTX-029 preferentially inhibited the proliferation of MAPK-activated cell lines, including those with BRAF or RAS mutations[1].

in vivo

In vivo, significant antitumor activity was observed in MAPK-activated tumor xenograft models following oral treatment. ASTX-029 also demonstrated activity in both in vitro and in vivo models of acquired resistance to MAPK pathway inhibitors.

References

[1] Munck, Joanne M. et al. “Supplementary Figures 1-7 from ASTX029, a Novel Dual-mechanism ERK Inhibitor, Modulates Both the Phosphorylation and Catalytic Activity of ERK.” 2023. 0.