BI-0252 is an inhibitor of MDM2-p53 (IC50:4 nM). BI-0252 can induce tumor regressions in all animals of a mouse SJSA-1 xenograft. And it concomitant induction of the tumor proteinp53 (TP53) target genes and markers of apoptosis.
AM-6761 is a potent inhibitor of the MDM2-p53interaction. In the SJSA-1 osteosarcoma xenograft model, AM-6761 shows excellent antitumor activity with an ED50 of 11 mg kg.
Nutlin-3 is an activator of p53 that functions by inhibiting the interaction of p53 with MDM2, a negative regulator of p53 activity. Caylin-1 is a nutlin-3 analog which contains chlorine substituents at the 3 and 4 positions on two of the phenyl rings rather than a single 4-chloro as seen in nutlin-3. At high concentrations, caylin-1 inhibits the growth of HCT116 cells with an IC50 value of approximately 7 μM, making it about 7-fold less potent than nutlin-3 in the same assay. Interestingly, at concentrations at or below 1 μM, caylin-1 promotes the growth of HCT116 cells approximately 20% compared to untreated cells. The mechanism of the growth promoting properties of caylin-1 have not yet been elucidated.
NSC405640 is a highly effective compound that inhibits the interaction between MDM2 and p53 proteins. Furthermore, it can restore the structural integrity of p53 molecules affected by mutations. Notably, NSC405640 exhibits selectivity ininhibiting the growth of cell lines that possess the normal, unmutated form of the p53 protein [1].
MDM2-IN-26 (compound A3) is an inhibitor of MDM2 that facilitates the activation of p53's tumor suppressor functions by inhibiting the MDM2-p53interaction, with MDM2 being the primary negative regulator of p53. This compound is utilized in cancer research [1].