Biochem/physiol Actions L-798106 was among the first prostanoid receptor EP3-selective antagonists. It has been used in multiple studies to tease out EP3 agonist activity, both in vitro and in vivo. It successfully blocks the actions of sulprostone, an EP3-selective agonist, and it helped show that the vascular contraction effect of PGE2 is due to its prostanoid EP3 agonist activity.1 |