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PLK1-IN-16

Cat No.:V142856 Purity: ≥98%
PLK1-IN-16 is a selective Polo-like kinase 1 (PLK1) inhibitor with an IC50 value of 0.25 nM.
PLK1-IN-16
PLK1-IN-16 Chemical Structure CAS No.: 3068378-51-5
Product category: PLK
This product is for research use only, not for human use. We do not sell to patients.
Size Price
500mg
1g
Other Sizes
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Product Description
PLK1-IN-16 is a selective Polo-like kinase 1 (PLK1) inhibitor with an IC50 value of 0.25 nM. PLK1-IN-16 exhibits low inhibitory activity against PLK2 and PLK3, induces G2 phase cell cycle arrest, induces apoptosis, and demonstrates anti-proliferative activity against tumor cells. PLK1-IN-16 is stable in a simulated gastric acid environment and shows acceptable inhibitory activity against CYP450. PLK1-IN-16 may be used in research on triple-negative breast cancer (TNBC), breast cancer, and leukemia.
Biological Activity I Assay Protocols (From Reference)
ln Vitro
PLK1-IN-16 (compound B7) inhibited the proliferation of MDA-MB-231, MDA-MB-361 and MV-4-11 cells, with IC50 values of 72.5 nM, 316 nM and 32.1 nM, respectively [1]. PLK1-IN-16 (12.5-200 nM; 72 h) arrested MV-4-11 cells in the G2 phase in a dose-dependent manner [1]. PLK1-IN-16 (5.0-80.0 nM; 72 h) induced apoptosis in MV-4-11 cells in a dose-dependent manner [1]. PLK1-IN-16 (2 h) was stable under simulated gastric acid conditions, with a residual rate of 98.4% after 2 h [1]. PLK1-IN-16 showed weak inhibitory effects on CYP1A2, CYP2C9, CYP2C19 and CYP2D6, but strong inhibitory effects on CYP3A4 (IC50 approximately 1 μM) [1]. PLK1-IN-16 exhibited high plasma protein binding rates in human (99.6%), rat (99.7%) and mouse (99.4%) plasma [1].
ln Vivo
PLK1-IN-16 (compound B7) (20 mg/kg; orally; once) showed high safety in mice, with normal growth and development, and no obvious physiological abnormalities or lesions were observed in the heart, liver, spleen, lungs and kidneys [1].
Cell Assay
Cell cycle analysis [1]
Cell Types: MV-4-11
Tested Concentrations: 12.5 nM, 25.0 nM, 50.0 nM, 100 nM and 200 nM
Incubation Duration: 72 hours
Experimental Results: G2 phase arrest was induced in a dose-dependent manner, and 4N DNA aggregation was observed starting from 100 nM.
Apoptosis analysis [1]
Cell Types: MV-4-11
Tested Concentrations: 5.0 nM, 10.0 nM, 20.0 nM, 40.0 nM and 80.0 nM
Incubation Duration: 72 hours
Experimental Results: Apoptosis rate increased in a concentration-dependent manner, ranging from 10.98% to 34.09%.
References

[1]. Design, synthesis and biological activity evaluation of a novel selective inhibitor in PLK1 with acyl or sulfonyl substituted dihydroindole structure. Bioorg Chem. 2026;169:109438.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C26H34N6O4S
Molecular Weight
526.65
CAS #
3068378-51-5
Appearance
Typically exists as solids at room temperature
SMILES
O=S(N1C2=CC(OC)=C(NC3=NC=C4C(N(C5CCCC5)[C@H](CC)C(N4C)=O)=N3)C=C2CC1)(C6CC6)=O
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples
Solubility (In Vivo)
Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

Injection Formulations
(e.g. IP/IV/IM/SC)
Injection Formulation 1: DMSO : Tween 80: Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300 :Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).
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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)]
*Preparation of 20% SBE-β-CD in Saline (4°C,1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10: 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300:Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline)


Oral Formulations
Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).
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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders


Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 1.8988 mL 9.4940 mL 18.9879 mL
5 mM 0.3798 mL 1.8988 mL 3.7976 mL
10 mM 0.1899 mL 0.9494 mL 1.8988 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

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An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
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  • Enter 10 in the Concentration box and choose the correct unit (mM)
  • Enter 5 in the Volume box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
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  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
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Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:
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Definitions of molecular mass, molecular weight, molar mass and molar weight:
  • Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
  • Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
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Reconstitution Calculator allows you to calculate the volume of solvent required to reconstitute your vial.

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In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration: mg/mL;

Method for preparing DMSO stock solution: mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation::Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

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