WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 406449

CAS#: 321688-88-4

Description: Poloxin is the first small-molecule inhibitor specifically targeting the function of the Plk1 PBD. Poloxin induces centrosome fragmentation and abnormal spindle and chromosome misalignment, which activate the spindle assembly checkpoint and prolong mitosis. Notably, centrosomal fragmentation induced by Poloxin is partially attributable to dysfunctional Kizuna, a key substrate of Plk1 at centrosomes. Moreover, Poloxin strongly inhibits proliferation of a panel of cancer cells by inducing mitotic arrest, followed by a surge of apoptosis. More important, we report, for the first time to our knowledge, that the PBD inhibitor, Poloxin , significantly suppresses tumor growth of cancer cell lines in xenograft mouse models by lowering the proliferation rate and triggering apoptosis in treated tumor tissues. Targeting the PBD by Poloxin is a powerful approach for selectively inhibiting Plk1 function in vitro and in vivo. ( Am J Pathol. 2011 Oct;179(4):2091-9. ). (2/18/2014)

Chemical Structure

CAS# 321688-88-4

Theoretical Analysis

MedKoo Cat#: 406449
Name: Poloxin
CAS#: 321688-88-4
Chemical Formula: C18H17NO4
Exact Mass: 311.11576
Molecular Weight: 311.33188
Elemental Analysis: C, 69.44; H, 5.50; N, 4.50; O, 20.56

Price and Availability

This product is not in stock, which may be available by custom synthesis. For cost-effective reason, minimum order is 1g (price is usually high, lead time is 2~3 months, depending on the technical challenge). Quote less than 1g will not be provided. To request quote, please email to sales @medkoo.com or click below button.
Note: Price will be listed if it is available in the future.

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Synonym: Poloxin

IUPAC/Chemical Name: (E)-4-isopropyl-3,6-dioxocyclohexa-1,4-dienecarbaldehyde O-(2-methylbenzoyl) oxime.


InChi Code: InChI=1S/C18H17NO4/c1-11(2)15-9-16(20)13(8-17(15)21)10-19-23-18(22)14-7-5-4-6-12(14)3/h4-11H,1-3H3/b19-10+

SMILES Code: O=C(C(/C=N/OC(C1=CC=CC=C1C)=O)=C2)C=C(C(C)C)C2=O

Appearance: white solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO, not in water

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 311.33188 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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1: Sanhaji M, Louwen F, Zimmer B, Kreis NN, Roth S, Yuan J. Polo-like kinase 1 inhibitors, mitotic stress and the tumor suppressor p53. Cell Cycle. 2013 May 1;12(9):1340-51. doi: 10.4161/cc.24573. Epub 2013 Apr 10. PubMed PMID: 23574746; PubMed Central PMCID: PMC3674062.

2: Weiß L, Efferth T. Polo-like kinase 1 as target for cancer therapy. Exp Hematol Oncol. 2012 Dec 10;1(1):38. doi: 10.1186/2162-3619-1-38. PubMed PMID: 23227884; PubMed Central PMCID: PMC3533518.

3: Sanhaji M, Kreis NN, Zimmer B, Berg T, Louwen F, Yuan J. p53 is not directly relevant to the response of Polo-like kinase 1 inhibitors. Cell Cycle. 2012 Feb 1;11(3):543-53. doi: 10.4161/cc.11.3.19076. Epub 2012 Feb 1. PubMed PMID: 22262171.

4: Yuan J, Sanhaji M, Krämer A, Reindl W, Hofmann M, Kreis NN, Zimmer B, Berg T, Strebhardt K. Polo-box domain inhibitor poloxin activates the spindle assembly checkpoint and inhibits tumor growth in vivo. Am J Pathol. 2011 Oct;179(4):2091-9. doi: 10.1016/j.ajpath.2011.06.031. Epub 2011 Aug 10. PubMed PMID: 21839059; PubMed Central PMCID: PMC3181368.

5: Liao C, Park JE, Bang JK, Nicklaus MC, Lee KS. Exploring Potential Binding Modes of Small Drug-like Molecules to the Polo-Box Domain of Human Polo-like Kinase 1. ACS Med Chem Lett. 2010;1(3):110-114. PubMed PMID: 20625469; PubMed Central PMCID: PMC2898210.

6: Reindl W, Yuan J, Krämer A, Strebhardt K, Berg T. Inhibition of polo-like kinase 1 by blocking polo-box domain-dependent protein-protein interactions. Chem Biol. 2008 May;15(5):459-66. doi: 10.1016/j.chembiol.2008.03.013. PubMed PMID: 18482698.

7: Lee KS, Idle JR. Pinning down the polo-box domain. Chem Biol. 2008 May;15(5):415-6. doi: 10.1016/j.chembiol.2008.04.009. PubMed PMID: 18482691.

Additional Information