生物活性 | |||
---|---|---|---|
描述 | RMC-4550 is a potent, selective and allosteric inhibitor of SHP2 enzyme with IC50 value of 0.58 nM, without activity against the SHP2 catalytic domain up to a concentration of 10 µM. RMC-4550 exhibited preferential inhibition in cell lines bearing the G12C mutation and potently suppressed pERK in Calu-1 cells at concentration <10μM. RMC-4550 both inhibited cell proliferation and suppressed RAS-GTP and pERK levels in NCI-H358 (lung, KRASG12C/+) and MIA PaCa-2 (pancreas, KRASG12C/G12C) cell lines. RMC-4550 led to caspase 3/7 activation at concentration of 1 and 10μM, indicative of a pro-apoptotic effect in NCI-H358 cells. Oral administration of RMC-4550 dose-dependently inhibited tumor growth in NCI-H358 xenograft mice at dose of 3, 10 and 30mg/kg, qd, and in MIA PaCa-2 xenograft mice at 10, 30 and 60mg/kg, qd, in MIA PaCa-2 xenograft mice, both of which are models of KRASG12C-driven cancer, with downregulated p-ERK observed[1]. | ||
作用机制 | RMC-4550 is an allosteric inhibitor of SHP2 enzyme. It downregulated RAS-GTP by disrupting the SHP2/SOS1/GRB2 module that is required for GTP-loading of RAS.[1][2] |
实验方案 | |||
---|---|---|---|
1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
2.29mL 0.46mL 0.23mL |
11.43mL 2.29mL 1.14mL |
22.86mL 4.57mL 2.29mL |
参考文献 |
---|