I-CBP112 是一种特异性的乙酰赖氨酸竞争性蛋白质-蛋白质相互作用抑制剂，靶向 CBP/p300 溴结构域，增强 p300 的乙酰化作用。

I-CBP112 is a specific and potent acetyl-lysine competitive protein-protein interaction inhibitor targeting the CBP/p300 bromodomains.

Exposure of human and mouse leukemic cell lines to I-CBP112 results in substantially impaired colony formation and induces cellular differentiation without significant cytotoxicity. Exposure of the BioMAP primary cell panel to I-CBP112 results in a unique response on cytokine and marker protein expression. I-CBP112 significantly enhances acetylation by p300 at the histone H3K18 and H3K23 sites. I-CBP112 stimulated H3K18ac by ~3-fold, I-CBP112 induced enhances acetylation of these same sites by CBP as well as at H4K5. The EC50's of activation of I-CBP112 on p300- and CBP-mediated H3K18 acetylation are ~2 μM.

I-CBP112 significantly reduces the leukemia-initiating potential of MLL-AF9+ AML cells in a dose-dependent manner in vitro and in vivo.

TGase 2 from guinea pig liver is preincubated for 10 min with various concentrations of GK13 or GK921 in 0.1 mL of reaction buffer, with or without 10 mM CaCl2, followed by the addition of 0.4 mL of substrate solution containing 2

I-CBP112 is dissolved in DMSO and diluted with appropriate medium before use. Cells (6000 KG1a and 13000 LNCaP cells/well) are plated in 96-well flat-bottom plates approximately 24 h prior to drug treatment. After 24 h, 10–20% fetal bovine serum-containing medium is replaced with 2.5% serum medium, and cells are treated with I-CBP112 in 0.18% DMSO; 0.18% DMSO is shown to have negligible cell growth effects under the conditions used in our experiments. After being exposed to I-CBP112 for 66 h, cells are subjected to a final concentration of 0.476% [3H]thymidine per well and allowed to proliferate for an additional 6 h (exposure to I-CBP112 for a total of 72 h). Cells are harvested, and the counts of 3H in each well are taken relative to those treated with vehicle alone to quantify the effect of the ligand on proliferation[1].

1640282-31-0

C27H36N2O5

468.59

DMSO:32 mg/mL
Powder: -20°C for 3 years
In solvent: -80°C for 2 years