Zaloglanstat (ISC-27864) is a selective and orally active inhibitor of microsomal prostaglandin E synthase-1 (mPGES-1) with an IC 50 of 5 nM. Zaloglanstat inhibits PGE 2 release of IC 50 at 161 nM and 154 nM in whole blood of pigs and dogs, respectively. Zaloglanstat can be used in studies of asthma, osteoarthritis and neurodegenerative diseases .