Catalog No.S2898

MLN0905 is a potent inhibitor of PLK1 with IC50 of 2 nM.

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MLN0905 Chemical Structure

MLN0905 Chemical Structure
Molecular Weight: 486.56

Validation & Quality Control

Quality Control & MSDS

PLK Inhibitors with Unique Features

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Product Information

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  • Research Area

Product Description

Biological Activity

Description MLN0905 is a potent inhibitor of PLK1 with IC50 of 2 nM.
Targets PLK1 [1]
IC50 2 nM
In vitro MLN0905 is a potent inhibitor of PLK1 with IC50 of 2 nM. MLN0905 inhibits cell mitosis with EC50 of 9 nM. MLN0905 inhibits Cdc25C-T96 phosphorylation, a direct readout of PLK1 inhibition with EC50 of 29 nM. MLN0905 inhibits HT-29 viability with LD50 of 22 nM. MLN0905 possesses reasonable selectivity against a panel of 359 kinases. [1] MLN0905 inhibits a panel of lymphoma cells viability with IC50 of 3 – 24 nM. [2]
In vivo Nude mice bearing HT-29 xenografts administered with MLN0905 (6.25 mg/Kg - 50 mg/Kg, p.o.) shows dose-dependent pharmacodynamic responses (48 hours after treatment). OCI LY-19-Luc tumor bearing mice administered with MLN0905 (3.12 mg/Kg – 6.25 mg/Kg, p.o.) shows significant pharmacodynamic responses amd peaks at 8 hours after treatment. [1] MLN0905 shows antitumor efficacy in treatment with OCI LY-19-Luc xenografts bearing scid mice for 21 days. The T/C of 6.25 mg/Kg daily group is 0.15. [2]

Protocol(Only for Reference)

Kinase Assay: [1]

PLK1 Flash Plate Assay The human PLK1 enzymatic reaction totaling 30μL contained 50 mM Tris-HCl (pH 8.0), 10 mM MgCl2, 0.02% BSA, 10% glycerol, 1 mM DTT, 100 mM NaCl, 3.3% DMSO, 8 μM ATP, 0.2μCi [γ- 33 P]-ATP, 4μM peptide substrate (Biotin-AHX-LDETGHLDSSGLQEVHLA-CONH2), and 10 nM recombinant human PLK1[2–369]T210D. The enzymatic reaction mixture, with or without PLK inhibitors, is incubated for 2.5 h at 30℃before termination with 20μL of 150 mM EDTA. Then 25μL of the stopped enzyme reaction mixture is transferred to a 384-well streptavidin coated Image FlashPlate and incubated at room temperature for 3 h. The Image Flash Plate wells are washed three times with 0.02% Tween-20 and then read on the Perkin-Elmer Viewlux.

Cell Assay: [1]

Cell lines HT-29
Incubation Time 72 h
Method Eight μL of serially diluted test compounds are added to75μL of HT29 (2.66 × 10 4 cells/well) cells in McCoy’s 5A media supplemented with 10% Fetal Calf Serum in Biocoat Poly-D lysine 384 well Black/Clear plates. Cells are incubated for 72 h at 37 ℃. Supernatant is aspirated from the wells, leaving 25μL in each well. ATP-lite 1 step reagent is added to each well, and luminescence for each plate is read on the LeadSeeker. Percent inhibition is calculated using the values from a DMSO control set to 100%.

Animal Study: [1]

Animal Models Nude mice bearing HT-29 xenografts
Dosages 6.25 mg/Kg – 50 mg/Kg
Administration p.o.

Conversion of different model animals based on BSA (Value based on data from FDA Draft Guidelines)

SpeciesMouseRatRabbitGuinea pigHamsterDog
Weight (kg)
Body Surface Area (m2)0.0070.0250.
Km factor36128520
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.

Rat dose (mg/kg) = mouse dose (22.4 mg/kg) ×  mouse Km(3)  = 11.2 mg/kg
rat Km(6)


[1] Duffey MO, et al. J Med Chem, 2012, 55(1), 197-208.

[2] Shi JQ, et al. Mol Cancer Ther, 2012, 11(9), 2045-2053.

Chemical Information

Download MLN0905 SDF
Molecular Weight (MW) 486.56


CAS No. 1228960-69-7
Storage 3 years -20℃powder
2 years -80℃in solvent
Synonyms N/A
Solubility (25°C) * In vitro DMSO 97 mg/mL (199.35 mM)
Water <1 mg/mL
Ethanol <1 mg/mL
* <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.
Chemical Name 6H-Pyrimido[5,4-d][1]benzazepine-6-thione, 2-[[5-[3-(dimethylamino)propyl]-2-methyl-3-pyridinyl]amino]-5,7-dihydro-9-(trifluoromethyl)-

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.

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
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