For research use only.

Catalog No.S8403

1 publication

MX69 Chemical Structure

CAS No. 1005264-47-0

MX69 is a MDM2/XIAP inhibitor that binds to MDM2 RING protein with binding Kd values of 2.34 μM. It is used for cancer treatment.

Selleck's MX69 has been cited by 1 publication

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Description MX69 is a MDM2/XIAP inhibitor that binds to MDM2 RING protein with binding Kd values of 2.34 μM. It is used for cancer treatment.
Mdm2 [1]
(Cell-free assay)
2.34 μM(Kd)
In vitro

MX69 inhibits expression of both MDM2 and XIAP in a time- and dose-dependent manner. MX69 induces ubiquitination of endogenous MDM2 in cancer cells. Downregulation of MDM2 by MX69 is through induction of MDM2 self-ubiquitination and degradation. Half-life of MDM2 in control-treated EU-1 cells is greater than 90 min, whereas MX69 treatment decreases the MDM2 half-life to <30 min. In SK-N-SH cells with stably transfected either wild-type (WT)-MDM2 or mutant MDM2-C464A, Treatment with MX69 significantly inhibits expression and increased the turnover of WT-MDM2 but not MDM2-C464A. MX69 significantly enhances the p53 half-life in WT-MDM2 but not mutant MDM2-C464A-transfected SK-N-SH cells. p53 is stabilized and accumulates in MX69-treated cells. MX69-mediated inhibition of XIAP is MDM2 dependent. Treatment of MX69 activates caspases 3, 7, and 9 as well as the cleavage of the death substrate PARP. MX69 also exhibits a significant cytotoxic effect on both ALL and NB lines(cancer cell lines), particularly those lines with MDM2 overexpression and a WTp53 phenotype. MX69-induced cell death is indeed due to apoptosis. MX69-induced cell apoptosis and death are dependent on MDM2, p53, and XIAP expression. MX69 shows minimal inhibitory effect on normal human bone marrow in vitro[1].

In vivo MX69 has significant apoptotic and anti-proliferative effects on MDM2-expressing cancer cells in vivo. MX69 is well tolerated in animals due to the fact that normal cells/tissues express little or no MDM2. No evidence of toxicity after treatment with MX69 at the 100 mg/kg dose. MDM2-specific agent MX69 should not activate either on-target (e.g., p53 induction) or off-target signaling pathways in normal cells. Thus, specific MDM2 inhibitors such as MX69 may be excellent candidates for targeted therapy of refractory cancers expressing high levels of MDM2[1].


Cell Research:[1]
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  • Cell lines: six ALL cell lines (EU-1, EU-3, EU-6, EU-8, SUP-B13, and UOC-B1) and six NB cell lines (NB-1691, NB-1643, SH-EP1, IMR-32, SK-NSH, and LA1-55N)
  • Concentrations: 0-10 μM
  • Incubation Time: 24 h
  • Method: The cytotoxic effect of leads is determined using the WST assay. Briefly, cells cultured in 96-well microtiter plates are treated with different concentrations of leads for a 20-hr period. WST (25 mg/well) is then added and incubation continued for an additional 4 hr, after which the optical density is read with a microplate reader.
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 95 mg/mL (200.18 mM)
Ethanol 41 mg/mL (86.39 mM)
Water Insoluble

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 474.57


CAS No. 1005264-47-0
Storage powder
in solvent
Synonyms N/A
Smiles CC1=C(C=C(C=C1)NS(=O)(=O)C2=CC3=C(C=C2)NC(C4C3C=CC4)C5=CC=C(C=C5)C(=O)O)C

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Mdm2 Signaling Pathway Map

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID