AT7519 HCl

Catalog No.S7808 Batch:S780801

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Technical Data

Formula

C16H18Cl3N5O2
Molecular Weight 418.71 CAS No. 902135-91-5
Solubility (25°C)* In vitro DMSO 52 mg/mL (124.19 mM)
Water 43 mg/mL (102.69 mM)
Ethanol 28 mg/mL (66.87 mM)
In vivo (Add solvents to the product individually and in order)
Clear solution
Saline
30.0mg/ml Taking the 1 mL working solution as an example, add 30 mg of this product to 1 ml of physiological saline (0.9% NaCL solution), mix evenly to make it clear, The mixed solution should be used immediately for optimal results. 
* <1 mg/ml means slightly soluble or 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.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description AT7519 HCl is a multi-CDK inhibitor for CDK1, 2, 4, 6 and 9 with IC50 of 10-210 nM in cell-free assays. It is less potent to CDK3 and little active to CDK7. Phase 2.
Targets
CDK9/CyclinT [1]
(Cell-free assay)		 CDK5/p35 [1]
(Cell-free assay)		 CDK2/CyclinA [1]
(Cell-free assay)		 GSK-3β [1]
(Cell-free assay)		 CDK4/CyclinD1 [1]
(Cell-free assay)		 View More
<10 nM 13 nM 47 nM 89 nM 100 nM
In vitro AT7519 is an ATP competitive CDK inhibitor with a Ki value of 38 nM for CDK1. AT7519 is inactive against all non-CDK kinases with the exception of GSK3β (IC50 = 89 nM). AT7519 shows potent antiproliferative activity in a variety of human tumor cell lines with IC50 values ranging from 40 nM for MCF-7 to 940 nM for SW620 consistent with the inhibition of CDK1 and CDK2. [1] AT7519 induces dose-dependent cytotoxicity in multiple myeloma (MM) cell lines with IC50 values ranging from 0.5 to 2 μM at 48 hours, with the most sensitive cell lines being MM.1S (0.5 μM) and U266 (0.5 μM) and the most resistant MM.1R (>2 μM). It does not induce cytotoxicity in peripheral blood mononuclear cells (PBMNC). AT7519 partially overcomes the proliferative advantage conferred by IL6 and IGF-1 as well as the protective effect of bone marrow stromal cells (BMSCs). AT7519 induces rapid dephosphorylation of RNA pol II CTD at serine 2 and serine 5 sites, and leads to the inhibition of transcription, partially contributing to AT7519 induced cytotoxicity of MM cells. AT7519 induces activation of GSK-3β by down-regulating GSK-3β phosphorylation, which also contributes to AT7519 induced apoptosis independent of the inhibition of transcription. [2]
In vivo A twice daily dosing of AT7519 (9.1 mg/kg) causes tumor regression of both early-stage and advanced-stage s.c. tumors in the HCT116 and HT29 colon cancer xenograft models. [1] AT7519 treatment (15 mg/kg) inhibits tumor growth and prolongs the median overall survival of mice in the human MM xenograft mouse model in association with increased caspase 3 activation. [2]

Protocol (from reference)

Kinase Assay:[1]
  • In vitro Kinase Assays

    Kinase assays for CDK1, CDK2 and GSK3-β are all carried out in a radiometric filter binding format. Assays for CDK5 are in DELFIA format and for CDKs 4 and 6 in ELISA format. For CDKs 1 and 2, the relevant CDK and 0.12 μg/mL Histone H1 are incubated in 20 mM MOPS, pH 7.2, 25 mM β-glycerophosphate, 5 mM EDTA, 15 mM MgCl2, 1 mM sodium orthovanadate, 1 mM DTT, 0.1 mg/mL BSA, 45 μM ATP (0.78 Ci/mmol) and different concentrations of AT7519 for 2 or 4 hours respectively. For GSK3-β, the relevant enzyme and 5 μM glycogen synthase peptide 2 along with 10 mM MOPS pH 7.0, 0.1 mg/mL BSA, 0.001% Brij-35, 0.5% glycerol, 0.2 mM EDTA, 10 mM MgCl2, 0.01% β-mercaptoethanol, 15 μM ATP (2.31 Ci/mmol) and different concentrations of AT7519 are incubated for 3 hours. Assay reactions are stopped by adding an excess of orthophosphoric acid and filtered using Millipore MAPH filter plates. The plates are then washed, scintillant added and radioactivity measured by scintillation counting on a Packard TopCount. For CDK5, CDK5/p35 and 1μM of a biotinylated Histone H1 peptide (Biotin-PKTPKKAKKL) are incubated in 25 mM Tris-HCl, pH 7.5, 2.5 mM MgCl2, 0.025% Brij-35, 0.1 mg/mL BSA, 1 mM DTT, 15 μM ATP and different concentrations of AT7519 for 30 minutes. Assay reactions are stopped using EDTA, transferred to Neutravidin-coated plates and phosphorylated peptide quantified by means of a rabbit phospho-cdk1 substrate polyclonal antibody and DELFIA europium-labelled anti-rabbit IgG secondary antibody using time-resolved fluorescence at λex=335nm, λem=620nm. For CDK 4 and 6 assays, plates are coated with GST- pRb769-921 and blocked with Superblock. CDK4 or 6 is incubated with 15 mM MgCl2, 50 mM HEPES, pH 7.4, 1 mM DTT, 1 mM EGTA, pH 8.0, 0.02% Triton X-100, 2.5% DMSO and different concentrations of AT7519; the reaction is initiated by addition of ATP. After 30 minutes, reactions are stopped by the addition of 0.5 M EDTA pH 8.0. Plates are then washed and incubated for one hour with the primary antibody (anti- p-Rb Serine 780) diluted in Superblock followed by secondary antibody (alkaline phosphatase linked anti-rabbit) for a further hour. Plates are developed using the Attophos system and fluorescence read on a Spectramax Gemini plate reader at excitation 450 nm and emission 580 nm. In all cases, IC50 values are calculated from replicate curves, using GraphPad Prism software.
Cell Assay:[2]
  • Cell lines

    MM.1S, MM.1R, RPMI8226, U266, RPMI8266, RPMI-Dox40, OPM1 cells, primary MM cells and PBMNCs

  • Concentrations

    Dissolved in DMSO at a concentration of 10 mM, final concentrations 0.25-4 μM

  • Incubation Time

    24 or 48 hours

  • Method

    Cells are incubated with different concentrations of AT7519 for 24 or 48 hours at 37°C. Cell viability is assessed by measuring 3-(4,5-dimethylthiazol-2-yl)-2,5 diphenyl tetrasodium bromide (MTT) dye absorbance. DNA synthesis is measured by tritiated thymidine uptake (3H-TdR). Apoptosis is assessed by using Annexin V/PI staining. The percentage of cells undergoing apoptosis is defined as the sum of early apoptosis (Annexin V-positive cells) and late apoptosis (Annexin V-positive and PI-positive cells
Animal Study:[2]
  • Animal Models

    Male SCID mice inoculated subcutaneously with MM.1S cells

  • Dosages

    15 mg/kg/day

  • Administration

    Dosed i.p.

Customer Product Validation

Data from [Data independently produced by , , Nat Biotechnol, 2014, 32(1): 92-96.]

Data from [Data independently produced by , , Int J Oncol, 2018, 53(2):703-712]

Selleck's AT7519 HCl has been cited by 12 publications

Interleukin-15 enhanced the survival of human γδT cells by regulating the expression of Mcl-1 in neuroblastoma [ Cell Death Discov, 2022, 8(1):139] PubMed: 35351861
O-GlcNAc transferase maintains metabolic homeostasis in response to CDK9 inhibition [ Glycobiology, 2022, cwac038] PubMed: 35708495
Cdk2 suppresses IL-23 expression and the onset of severe acute pancreatitis [ Immun Inflamm Dis, 2022, 10(6):e631] PubMed: 35634959
High-content image-based analysis and proteomic profiling identifies Tau phosphorylation inhibitors in a human iPSC-derived glutamatergic neuronal model of tauopathy [ Sci Rep, 2021, 11(1):17029] PubMed: 34426604
The cyclin-dependent kinase inhibitor AT7519 augments cisplatin's efficacy in ovarian cancer via multiple oncogenic signaling pathways [ Fundam Clin Pharmacol, 2021, 10.1111/fcp.12709] PubMed: 34212421
Development of a miRNA-controlled dual-sensing system and its application for targeting miR-21 signaling in tumorigenesis [ Exp Mol Med, 2020, 10.1038/s12276-020-00537-z] PubMed: 33311703
Inhibition of Cyclin-dependent Kinase (CDK) Decreased Survival of NB4 Leukemic Cells: Proposing a p53-Independent Sensitivity of Leukemic Cells to Multi-CDKs Inhibitor AT7519 [ Iran J Pharm Res, 2020, 19(3):144-155] PubMed: 33680018
Fibroblast growth factor receptor influences primary cilium length through an interaction with intestinal cell kinase [ Proc Natl Acad Sci U S A, 2019, 116(10):4316-4325] PubMed: 30782830
CDK Blockade Using AT7519 Suppresses Acute Myeloid Leukemia Cell Survival through the Inhibition of Autophagy and Intensifies the Anti-leukemic Effect of Arsenic Trioxide [ Iran J Pharm Res, 2019, 18(Suppl1):119-131] PubMed: 32802093
Frequent Genetic Aberrations in the CDK4 Pathway in Acral Melanoma Indicate the Potential for CDK4/6 Inhibitors in Targeted Therapy [Kong Y Clin Cancer Res, 2018, 23(22):6946-6957] PubMed: 28830923

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