1. Epigenetics
  2. Histone Methyltransferase
  3. EPZ015666

EPZ015666  (Synonyms: GSK3235025)

Cat. No.: HY-12727 Purity: 99.13%
COA Handling Instructions

EPZ015666 (GSK3235025) is an orally available inhibitor of PRMT5 with an IC50 of 22 nM.

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

EPZ015666 Chemical Structure

EPZ015666 Chemical Structure

CAS No. : 1616391-65-1

Size Price Stock Quantity
Solid + Solvent
10 mM * 1 mL in DMSO
ready for reconstitution
USD 121 In-stock
10 mM * 1 mL in DMSO USD 121 In-stock
1 mg USD 52 In-stock
5 mg USD 110 In-stock
10 mg USD 165 In-stock
50 mg USD 495 In-stock
100 mg USD 715 In-stock
200 mg   Get quote  
500 mg   Get quote  

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Customer Review

Based on 13 publication(s) in Google Scholar

Top Publications Citing Use of Products
  • Biological Activity

  • Protocol

  • Purity & Documentation

  • References

  • Customer Review


EPZ015666 (GSK3235025) is an orally available inhibitor of PRMT5 with an IC50 of 22 nM.

IC50 & Target

IC50: 22 nM (PRMT5)[1]

In Vitro

Treatment of MCL cell lines with EPZ015666 (GSK3235025) leads to inhibition of SmD3 methylation and cell death, with IC50 values in the nanomolar range[1]. EPZ015666 (GSK3235025), a potent peptide-competitive and SAM-cooperative inhibitor with >10,000-fold specificity against PRMT5 relative to other methyltransferases[2].

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

In Vivo

EPZ015666 (GSK3235025) is orally bioavailable and amenable to in vivo studies. We performed 21-d efficacy studies in severe combined immunodeficiency (SCID) mice bearing subcutaneous Z-138 and Maver-1 xenografts, with twice-daily (BID) oral dosing on four dose groups: 25, 50, 100 and 200 mg per kilogram of body weight (mg/kg). After 21 d of continuous dosing, animals are euthanized, and blood and tissues are analyzed to determine the relationship between methyl-mark pharmacodynamics and tumor-growth inhibition (TGI). EPZ015666 (GSK3235025) showed dose-dependent exposure and TGI after 21 d in both MCL models. Tumors in all EPZ015666 (GSK3235025) dose groups measured on day 21 showed statistically significant differences in weight, volume and tumor growth compared to vehicle-treated tumors. Dosing at 200 mg/kg BID induced tumor stasis in Z-138 cells, with >93% TGI after 21 d, whereas Maver-1 cells showed >70% TGI. Additionally, a third MCL xenograft is tested using the Granta-519 cell line, a fast-growing model that reached endpoint on day 18 and showed dose-dependent efficacy with 45% TGI in the 200 mg/kg group. EPZ015666 (GSK3235025) is well tolerated in all three models, with minimal bodyweight loss in the 200 mg/kg dose group and no other clinical observations[1].

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

Molecular Weight







White to off-white




Room temperature in continental US; may vary elsewhere.

Powder -20°C 3 years
4°C 2 years
In solvent -80°C 2 years
-20°C 1 year
Solvent & Solubility
In Vitro: 

DMSO : 100 mg/mL (260.80 mM; Need ultrasonic)

Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.6080 mL 13.0399 mL 26.0797 mL
5 mM 0.5216 mL 2.6080 mL 5.2159 mL
10 mM 0.2608 mL 1.3040 mL 2.6080 mL
*Please refer to the solubility information to select the appropriate solvent.
In Vivo:
  • 1.

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

    Solubility: ≥ 2.5 mg/mL (6.52 mM); Clear solution

  • 2.

    Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in Saline)

    Solubility: ≥ 2.5 mg/mL (6.52 mM); Clear solution

  • 3.

    Add each solvent one by one:  10% DMSO    90% Corn Oil

    Solubility: ≥ 2.5 mg/mL (6.52 mM); Clear solution

*All of the co-solvents are available by MedChemExpress (MCE).
Purity & Documentation

Purity: 99.83%

Cell Assay

Cultured cells in linear/log-phase growth are split to a seeding density of 2×105 cells/mL in 2-20 mL of media, depending on the yield required at the end of the growth period. Compound is diluted in DMSO and added to each culture vessel with a final DMSO concentration of 0.2%. Cells are allowed to grow for 96 h undisturbed. At the conclusion of each treatment period, cells are harvested by centrifugation (5 min, 1,200 rpm), and cell pellets are rinsed once with PBS before being frozen on dry ice pending further processing. Long-term proliferation assays are performed on all MCL lines, with slight adjustments to initial seeding densities, depending on growth characteristics for each cell line. All assays are carried out for 12 d[1].

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

Animal Administration

Male CD-1 mice (25-40 g; n=6, with 3 per time point) are treated with a single dose of EPZ015666 (GSK3235025) at 2 mg/kg by intravenous tail-vein injection and 10 mg/kg by oral gavage administration, with both doses formulated in 20% N-N-dimethylacetamide in water. Animals are fasted overnight and weighed before dose administration on the day of dosing. Approximately 30 μL of blood are taken from animals by submandibular or retro-orbital bleeding at pre-specified time intervals (seven time points). For the last time point (24 h), samples are collected via cardiac puncture while the animals are under anesthesia (70% CO2:30% O2). Blood samples are transferred into K2-EDTA tubes and placed on wet ice before centrifugation at 4°C (3,000g, 15 min) to obtain plasma within 30 min after sample collection. Plasma samples are stored at −70±10°C before protein precipitation and LC-MS/MS analysis. We constructed standard calibration curves by analyzing a series of control plasma aliquots containing 100 ng/mL labetalol as an internal standard and 1-3,000 ng/mL EPZ015666 (GSK3235025). Four levels of quality control are also included in the analysis (3-2,400 ng/mL EPZ015666 (GSK3235025)). Data are analyzed using Phoenix WinNonlin 6.2.1.

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

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EPZ015666 Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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