| Description: |
AMG-232 is a novel inhibitor of p53-MDM2 with IC50 value of 9.2 nM.
Tumor protein p53 (p53) is a very unstable protein with a half-life ranging from 5 to 30 min and participates in a variety of anticancer processes, such as inducing cell apoptosis and inhibiting angiogenesis. Mouse double minute 2 homolog (MDM2), also named as E3 ubiquitin-protein ligase Mdm2, involves in mediating p53 tumor suppressor. It has been conclusively demonstrated p53 is under-expressed in tumor cells.
AMG-232 is a potent p53-MDM2 interaction inhibitor and is regarded as a promising drug in clinic. When tested with SJSA-1 tumor cell line, AMG-232 treatment resulted in cell-cycle arrest and inhibition of tumor cell proliferation via binding to MDM2 protein and robustly inducing p53 activity. It was shown that p53-MDM2 bond rang from a Kd of 60 to 700 nM Depending on the length of p53 peptide.
In mouse model with SJSA-1 tumor cells subcutaneous xenograft, co-administration of AMG-232 and chemotherapies induced DNA damage and p53 activity which resulted in significantly superior antitumor efficacy and regression through arresting cell growth and inducting apoptosis. |
