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AZD-0364 is a potent and selective ERK2 inhibitor extracted from patent WO2017080979A1, compound example 18, has an IC50 of 0.6 nM.

AZD-0364 is measured in the ERK2 mass spectrometry and A375 phospho-p90RSK assays with IC50s of 0.6 nM and 5.7 nM, respectively. AZD-0364 can inhibit the growth of a panel of cancer cell lines (A549, H2122, H2009, and Calu6 cell lines) with KRAS mutations as a monotherapy and this effect is synergistically enhanced by treatment with Selumetinib[1].

Tumor growth inhibition by AZD-0364 ethanesulfonic acid (Example 18a) in combination with MEK inhibitor Selumetinib is measured. Studies are performed in the A549 xenograft model. Selumetinib is dosed twice daily (BiD) 8 hours apart and AZD-0364 ethanesulfonic acid is dosed once daily (QD) 4 hours after the first Selumetinib dose. Both compounds are dosed continuously for 3 weeks. Both vehicles are dosed in the vehicle group. Both Selumetinib and AZD-0364 ethanesulfonic acid reduce tumor growth relative to vehicle only control. The combination of Selumetinib and AZD-0364 ethanesulfonic acid results in a reduction in tumor growth[1].

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