1. Cell Cycle/DNA Damage
  2. Polo-like Kinase (PLK)


Cat. No.: HY-12134 Purity: 96.26%
Handling Instructions

Poloxin is a non-ATP competitive Polo-like Kinase 1 (PLK1) inhibitor that targets the polo-box domain, with an IC50 of appr 4.8 μM.

For research use only. We do not sell to patients.

Poloxin Chemical Structure

Poloxin Chemical Structure

CAS No. : 321688-88-4

Size Price Stock Quantity
Free Sample (0.5-1 mg)   Apply now  
10 mM * 1 mL in DMSO USD 72 In-stock
Estimated Time of Arrival: December 31
10 mg USD 65 In-stock
Estimated Time of Arrival: December 31
50 mg USD 264 In-stock
Estimated Time of Arrival: December 31
100 mg   Get quote  
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View All Polo-like Kinase (PLK) Isoform Specific Products:

  • Biological Activity

  • Protocol

  • Technical Information

  • Purity & Documentation

  • References


Poloxin is a non-ATP competitive Polo-like Kinase 1 (PLK1) inhibitor that targets the polo-box domain, with an IC50 of appr 4.8 μM.

IC50 & Target[4]


4.8 μM (IC50)


18.7 μM (IC50)


53.9 μM (IC50)

In Vitro

Poloxin (25 μM) induces defects in centrosome integrity, spindle formation, and chromosome alignment in mitosis. Centrosomal fragmentation induced by Poloxin is partially rescued by Kiz T379E. Poloxin (25 μM) activates the mitotic checkpoint, induces apoptosis and inhibits proliferation of MDA-MB-231 cells[1]. Poloxin inhibits proliferation in both cell lines with a comparable efficiency through 72 h period[2]. Poloxin inhibits the polo-box domain (PBD) interaction with an apparent IC50 of ∼4.8 μM. Poloxin exhibits a loose Plk1 PBD specificity with 4-10 times higher IC50 values for Plk2 and Plk3, and does not significantly inhibit other types of phosphopeptide-binding domains such as FHA, WW, and SH2 domains[3].

In Vivo

Poloxin (40 mg/kg) decreases the proliferation of MDA-MB-231 cells, and surpresses the growth of the tumor nude mice bearing established xenografts of MDA-MB-231[1].

Solvent & Solubility
In Vitro: 

10 mM in DMSO

Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 3.3630 mL 16.8152 mL 33.6304 mL
5 mM 0.6726 mL 3.3630 mL 6.7261 mL
10 mM 0.3363 mL 1.6815 mL 3.3630 mL
*Please refer to the solubility information to select the appropriate solvent.
Cell Assay

Cell Viability Assay on treated cells in 96-well plates, based on viable cells. 20 μL of CellTiter-Blue®reagent is added to each well and then incubated at 37°C with 5% CO2 for 4h before fluorescence reading using a Victor 1420 Multilabel Counter. All experiments are performed in triplicate and at least three independent experiments are performed. Data are presented as percentage compared with control.

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Administration

Viable MDA-MB-231 or HeLa cells (1×106) are resuspended in 300 μL of 0.9% NaCl and s.c. injected into both flanks of nude mice (MDA-MB-231: n=8 mice in each group, total N=16; HeLa: n=7 mice in each group, total N=14). Approximately 3 weeks after inoculation, mice are treated with Poloxin (40 mg/kg) or TQ (20 mg/kg) by intratumoral injection on Mondays, Wednesdays, and Fridays for 5 to 6 weeks. The tumor area is calculated by multiplication of the greatest diameter with the perpendicular diameter every 2 to 3 days. Measurements of all tumors within the group are represented by the mean value. U-tests and Student's t-tests are performed for statistical evaluation among MDA-MB-231 groups and between HeLa groups, respectively. All mice are properly treated in accordance with the guidelines of the local animal committee.

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Molecular Weight








Powder -20°C 3 years
  4°C 2 years
In solvent -80°C 6 months
  -20°C 1 month

Room temperature in continental US; may vary elsewhere

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× = ×
C1   V1   C2   V2

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Cat. No.: HY-12134