Send to

Choose Destination
Bioorg Med Chem Lett. 2014 May 1;24(9):2212-21. doi: 10.1016/j.bmcl.2014.02.068. Epub 2014 Mar 12.

From virtual to clinical: The discovery of PGN-1531, a novel antagonist of the prostanoid EP4 receptor.

Author information

Argenta, 8/9 Spire Green Centre, Flex Meadow, Harlow, Essex CM19 5TR, United Kingdom. Electronic address:
Argenta, 8/9 Spire Green Centre, Flex Meadow, Harlow, Essex CM19 5TR, United Kingdom.
BTG International Ltd, 5 Fleet Place, London EC4M 7RD, United Kingdom.
Pharmagene plc, 2 Orchard Road, Royston, Hertfordshire SG8 5HD, United Kingdom.


In this Letter, we present the results of a hit-finding and lead optimization programme against the EP4 receptor (EP4R). In a short time period, we were able to discover five structurally diverse series of hit compounds using a combination of virtual screening methods. The most favoured hit, compound 6, was demonstrated to be a competitive antagonist of the EP4R. Compound 73 was identified following several rounds of optimization, which centred on improving both the primary EP4R affinity and selectivity against the related EP2R as well as the aqueous solubility. This work culminated in the preparation of PGN-1531, the sodium salt of 73, which showed a marked improvement in solubility (>10 mg/mL). PGN-1531 is a potent and selective antagonist at EP4Rs in vitro and in vivo, with the potential to alleviate the symptoms of migraine that result from cerebral vasodilatation.


Cerebral vasodilatation; EP(4) receptor antagonist; Hit-finding; Lead optimization; Migraine

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center