CP-91149

Licensed by Pfizer Catalog No.S2717

CP-91149 Chemical Structure

Molecular Weight(MW): 399.87

CP-91149 is a selective glycogen phosphorylase (GP) inhibitor with IC50 of 0.13 μM in the presence of glucose, 5- to 10-fold less potent in the absence of glucose.

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In DMSO USD 110 In stock
USD 70 In stock
USD 110 In stock
USD 370 In stock
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Cited by 1 Publication

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  • C, experimental design illustrating the time points in which PYGL inhibitor CP-91149 (GPi) and 2DG were added to the groups depicted in D to J. D, representative images of cell invasion through the Boyden chamber from control, 2DG and recovery GBM1 treated with GPi or DMSO. E to G, comparison of the invasive capacity of EV or shG6PC in the presence or absence of GPi.

    Mol Cancer Res, 2014, 12(11):1547-59.. CP-91149 purchased from Selleck.

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Biological Activity

Description CP-91149 is a selective glycogen phosphorylase (GP) inhibitor with IC50 of 0.13 μM in the presence of glucose, 5- to 10-fold less potent in the absence of glucose.
Targets
Glycogen phosphorylase (GP) [1]
0.13 μM
In vitro

CP-91149 displays 200-fold higher inhibitory activity against human liver glycogen phosphorylase a (HLGPa) than caffeine (IC50 = 26 μM). CP-91149 (10-100 μM) inhibits glucagon-stimulated glycogenolysis in isolated rat hepatocytes in a dose-dependent manner, and in primary human hepatocytes with IC50 of ~2.1 μM. [1] CP-91149 also potently inhibits the activities of human muscle phosphorylase a and b with IC50 of 0.2 μM and ~0.3 μM, respectively. CP-91149 treatment at 2.5 μM induces inactivation of phosphorylase and sequential activation of glycogen synthase in hepatocytes, and increases glycogen synthesis by 7-fold at 5 mM glucose and by 2-fold at 20 mM glucose. CP-91149 can partially counteract the effects of phosphorylase overexpression. [2] CP-91149 also potently inhibits brain GP with IC50 of 0.5 μM in A549 cells. CP-91149 treatment at 10-30 μM causes significant glycogen accumulation in A549 and HSF55 cells. CP-91149 treatment increases G1-phase cells with a significant reduction of the S-phase population in HSF55 cells, correlated with increased expression of p21 and p27. [3] CP-91149 also promotes the dephosphorylation and activation of GS (glycogen synthase) in non-engineered or GP-overexpressing cultured human muscle cells, but exclusively in glucose-deprived cells. [4]

In vivo Oral administration of CP-91149 to diabetic ob/ob mice at 25-50 mg/kg causes rapid (3 hours) glucose lowering by 100-120 mg/dl without producing hypoglycemia, resulting from inhibition of glycogenolysis in vivo. CP-91149 treatment does not lower glucose levels in normoglycemic, nondiabetic mice. [1] In the non-fasted Goto-Kakizaki (GK) rats, administration of CP-91149 in combination with CS-917 suppresses hepatic glycogen reduction by CS-917 and decreases plasma glucose more than single administration of CS-917. [5]

Protocol

Kinase Assay:[1]
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Phosphorylase enzyme assay:

Human liver glycogen phosphorylase a (HLGPa, 85 ng) activity is measured in the direction of glycogen synthesis by the release of phosphate from glucose-1-phosphate at 22°C in 100 μL of buffer containing 50 mM Hepes (pH 7.2), 100 mM KCl, 2.5 mM EGTA, 2.5 mM MgCl2, 0.5 mM glucose-1-phosphate, and 1 mg/mL glycogen. Phosphate is measured at 620 nm, 20 minutes after the addition of 150 μL of 1 M HCl containing 10 mg/mL ammonium molybdate and 0.38 mg/mL malachite green. Increasing concentrations of CP-91149 are added to the assay in 5 μL of 14% DMSO.
Cell Research:[3]
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  • Cell lines: HSF55 and T98G
  • Concentrations: Dissolved in DMSO, final concentrations ~50 μM
  • Incubation Time: 72 hours
  • Method: Cells are exposed to various concentrations of CP-91149 for 72hours. Viability is determined with manual cell counts following staining with trypan blue exclusion assay. Cells are fixed with 70% ethanol. DNA is stained with propidium iodide and the intensity of fluorescence is measured using a Becton-Dickinson flow cytometer at 488nm for excitation and at 650nm for emission. The cell cycle profile is analyzed using Modifit's Sync Wizard.
    (Only for Reference)
Animal Research:[1]
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  • Animal Models: Obese, diabetic male C57BL/6J-Lep(ob/ob) mice and their lean, nondiabetic C57BL/6J-/+ littermates
  • Formulation: Formulated in vehicle consisting of either 0.25% (wt/vol) methyl cellulose in water or 0.1% Pluronic P105 Block Copolymer Surfactant in 0.1% saline
  • Dosages: ~50 mg/kg
  • Administration: Orally
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 80 mg/mL (200.06 mM)
Water Insoluble
Ethanol Insoluble
In vivo Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
0.5% methylcellulose+0.2% Tween 80
For best results, use promptly after mixing.
5 mg/mL

* 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 399.87
Formula

C21H22ClN3O3

CAS No. 186392-40-5
Storage powder
in solvent
Synonyms N/A

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Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID