Catalog No. size PriceQuantity
M6971-2 2mg solid $107
M6971-10 10mg solid $436


GSK-923295, also known as GSK-923295A, is a novel antimitotic inhibitor of centromere-associated protein E (CENP-E) with potential anticancer activity. GSK-923295A demonstrated significant antitumor activity against solid tumor models, inducing CRs in Ewing sarcoma, rhabdoid, and rhabdomyosarcoma xenografts. Clinical study showed that GSK-923295 had dose-proportional pharmacokinetics and a low number of grade 3 or 4 adverse events. The observed incidence of myelosuppression and neuropathy was low. Further investigations may provide a more complete understanding of the potential for GSK-923295 as an antiproliferative agent.

Product information

CAS Number: 1088965-37-0

Molecular Weight: 592.13

Formula: C32H38ClN5O4





GSK 923295

GSK 923295A

Chemical Name: 3-Chloro-N-{(1S)-2-[(N,N-dimethylglycyl)amino]-1-[(4-{8-[(1S)-1-hydroxyethyl]imidazo[1,2-a]pyridin-2-yl}phenyl)methyl]ethyl}-4-[(1-methylethyl)oxy]benzamide

Smiles: CN(C)CC(=O)NC[C@H](CC1C=CC(=CC=1)C1=CN2C=CC=C([C@H](C)O)C2=N1)NC(=O)C1=CC(Cl)=C(C=C1)OC(C)C


InChi: InChI=1S/C32H38ClN5O4/c1-20(2)42-29-13-12-24(16-27(29)33)32(41)35-25(17-34-30(40)19-37(4)5)15-22-8-10-23(11-9-22)28-18-38-14-6-7-26(21(3)39)31(38)36-28/h6-14,16,18,20-21,25,39H,15,17,19H2,1-5H3,(H,34,40)(H,35,41)/t21-,25-/m0/s1

Technical Data

Appearance: Solid Power.

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

Solubility: Soluble in DMSO, not in water

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined.

HS Tariff Code: 382200

How to use

In Vitro:

GSK-923295 (GSK923295) is a first-in-class, specific, allosteric inhibitor of CENP-E kinesin motor function. GSK923295 is uncompetitive with both ATP and MT, inhibiting CENP-E MT-stimulated ATPase activity with a Ki of 3.2±0.2 nM and 1.6±0.1 nM for human and canine, respectively. GSK923295 inhibits release of inorganic phosphate and stabilized CENP-E motor domain interaction with microtubules. GSK923295 has broad growth inhibitory activity in a panel of 237 cancer cell lines and produces significant tumor growth-delay in 8 of the 11 mouse xenograft tumor models with IC50s of 17.2 nM, 55.6 nM, 42 nM, and 51.9 nM for SW48, RKO (BRAF mutant), SW620 (KRAS mutant), and HCT116 (KRAS mutant), respectively. GSK923295 is a potent and selective small molecule inhibitor of human CENPE with a Ki of 3.2 nM. GSK923295 demonstrates broad efficacy against a panel of 19 human neuroblastoma derived cell lines with an average growth IC50 of 41 nM.

In Vivo:

Xenografts of mice treated with GSK-923295 (GSK923295) shows significant tumor growth delay compared to the control arm (NB-EBc1 p<0.0001; NB-1643 p=0.018; NB-1691 p=0.0018).


  1. Mayes PA, Degenhardt YY, Wood A, Toporovskya Y, Diskin SJ, Haglund E, Moy C, Wooster R, Maris JM. Mitogen-activated protein kinase (MEK/ERK) inhibition sensitizes cancer cells to centromere-associated protein E inhibition. Int J Cancer. 2013 Feb 1;132(3):E149-57. doi: 10.1002/ijc.27781. Epub 2012 Sep 28. PubMed PMID: 22948716.
  2. Chung V, Heath EI, Schelman WR, Johnson BM, Kirby LC, Lynch KM, Botbyl JD, Lampkin TA, Holen KD. First-time-in-human study of GSK923295, a novel antimitotic inhibitor of centromere-associated protein E (CENP-E), in patients with refractory cancer. Cancer Chemother Pharmacol. 2012 Mar;69(3):733-41. doi: 10.1007/s00280-011-1756-z. Epub 2011 Oct 22. PubMed PMID: 22020315.
  3. Lock RB, Carol H, Morton CL, Keir ST, Reynolds CP, Kang MH, Maris JM, Wozniak AW, Gorlick R, Kolb EA, Houghton PJ, Smith MA. Initial testing of the CENP-E inhibitor GSK923295A by the pediatric preclinical testing program. Pediatr Blood Cancer. 2012 Jun;58(6):916-23. doi: 10.1002/pbc.23176. Epub 2011 May 16. PubMed PMID: 21584937; PubMed Central PMCID: PMC3163687.

Products are for research use only. Not for human use.

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