product name GSK1324726A (I-BET726)
Description: GSK1324726A (I-BET726) is a highly selective inhibitor of BET family proteins with IC50 of 41 nM, 31 nM, and 22 nM for BRD2, BRD3, and BRD4, respectively. GSK1324726A competes with histone H4 peptides for binding to the bromodomains of the BET proteins. It notably inhibits cell growth in neuroblastoma cell lines with a median GI50 value of 75nM. And it is also found to cause some level of net cell death.
References: PLoS One. 2013 Aug 23;8(8):e72967; J Med Chem. 2014 Oct 9;57(19):8111-31.
434.91
Formula
C25H23ClN2O3
CAS No.
1300031-52-0
Storage
-20℃ for 3 years in powder form
-80℃ for 2 years in solvent
Solubility (In vitro)
DMSO: 86 mg/mL (197.7 mM)
Water: <1 mg/mL
Ethanol: 86 mg/mL (197.7 mM)
Solubility (In vivo)
Synonyms
other peoduct :References PubMed ID：:http://www.ncbi.nlm.nih.gov/pubmed/19419788
| In Vitro |
In vitro activity: In neuroblastoma cell lines, GSK1324726A inhibits cell growth and induces cytotoxicity. GSK1324726A also modulates expression of genes involved in apoptosis, signaling, and MYC-family pathways, including the direct suppression of BCL2 and MYCN. Kinase Assay: For determination of binding affinities to BET protein bromodomains, I-BET726 is titrated against truncates containing both BD1 and BD2 of BRD2 (10 nM), BRD3 (10 nM), and BRD4 (10 nM) in 50 mM HEPES pH7.5, 150 mM NaCl, 5% Glycerol, 1 mM DTT and 1 mM CHAPS in the presence of an Alexa 647 derivative (50 nM) of fluorescent ligand. After equilibrating for 1 h, the bromodomain protein: ligand interaction is detected using Time Resolved Fluorescence Resonance Energy Transfer (TR-FRET) following the addition of 1.5 nM europium chelate labeled anti-6His antibody. Plates are read using an Envision Plate reader (λEX = 337 nm, λEM = 615 nm, λEM = 665 nm; dual dichroic = 400 nm & 630 nm). These data are fitted to a four parameter IC50 model using Graphit data analysis software. Cell Assay: Briefly, cells (LA-N-1, Kelly, LA1-55n, BE(2)-M17, BE(2)-C, KanTS, IMR32, LA-N-2, SK-N-SH, SK-N-BE(2), CHP-134, SK-N-AS, SH-SY5Y, SK-N-FI, CHP-212, LA1-5s, SK-N-DZ cells) are seeded into 384-well or 96-well plates at a density optimized for 6 days of growth. The following day, T0 measurements are taken using CellTiter-Glo, CellTiter-Fluor, or CyQuant Direct, following the manufacturer’s instructions. Plates are read on an Envision, Safire 2, or SpectraMax Gemini EM plate reader. Remaining plates are treated with DMSO or a titration of I-BET726. Cells are incubated for 6 days and developed as described above. Results are plotted as a percentage of the T0 value, normalized to 100%, versus concentration of compound. A 4-parameter equation is used to generate concentration response curves. Growth IC50 (gIC50) values are calculated at the mid-point of the growth window (between DMSO and T0 values). Ymin-T0 values are calculated by subtracting the T0 value (100%) from the Ymin value on the curve, and are a measure of net population cell growth or death. |
|---|---|
| In Vivo | In the mouse SK–N-AS and CHP-212 models, GSK1324726A (15 mg/kg p.o.) results in tumor growth inhibition and down-regulation MYCN and BCL2 expression. In a mouse septic shock model, GSK1324726A (10 mg/kg i.v.) shows potent anti-inflammatory effects, and prevents death of diseased animals |
| Animal model | Xenograft models of non-MYCN-amplified and MYCN-amplified neuroblastoma in immunocompromised mice using the SK–N-AS and CHP-212 cell lines |
| Formulation & Dosage | Suspended in 1% methylcellulose; 15 mg/kg; p.o. |
| References | PLoS One. 2013 Aug 23;8(8):e72967; J Med Chem. 2014 Oct 9;57(19):8111-31. |
