Background:

IC50: 10 nM

EPZ020411 is an inhibitor of PRMT6.

PRMT6, a member of the protein arginine methyltransferasefamily, comprises 45 enzymes. The post-translational modifications of PRMT6 are important regulators of RNA processing, transcriptional regulation, and signal transduction.

In vitro: In biochemical assays, EPZ020411 was found to be over 100-fold selective for PRMT6/8/1 compared to other histone methyltransferases, such as PRMT3, PRMT4, PRMT5 and PRMT7. In addition, EPZ020411 treatment led to a dose-dependent decrease in H3R2 methylation, while treatment with its PRMT6-inactive analog did not generate an IC50 at concentrations up to 20 μM [1].

In vivo: Animal study found that male SD rats i.v. administered a single dose of EPZ020411 at 1 mg/kg showed a moderate clearance of 19.7 mL/min/kg, with a volume of distribution at steady state of 11.1 L/kg, and a mean terminal half-life of 8.54 h. Following 5 mg/kg s.c. dosing, a good bioavailability of 65.6 was observed, resulting in EPZ020411 unbound concentration remaining over the PRMT6 IC50 for more than 12 h [1].

Clinical trial: Up to now, EPZ020411 is still in the preclinical development stage.

Reference:
[1] Mitchell LH, et al.  Aryl Pyrazoles as Potent Inhibitors of Arginine Methyltransferases: Identification of the First PRMT6 ToolCompound. ACS Med Chem Lett. 2015 Apr 6;6(6):655-659.