Microsomal prostaglandin E2 synthase-1 (mPGES1) is a molecule belonging to the MAPEG superfamily and is involved in the conversion of PGH2 to excess PGE2 associated with pain and inflammation. Gesynta Pharma AB presented first data on the mPGES1 inhibitor GS-248 for the treatment of pain and inflammation. In their experiments, GS-248 demonstrated a human whole-blood assay (hWBA) IC50 of 0.4 nM, and hWBA activity about 1000-fold more potent than that of celecoxib. No cross reactivity was observed with COX1 or COX2. Moreover, the compound showed IC50 values for human, dog, rat/mouse and minipig mPGES1 of 2.5, 1.3, > 1000 and 23 nM, respectively.

Efforts at Abbvie Inc. to selectively target voltage-gated sodium channel subunit alpha Nav1.7 to treat pain led to the discovery of quinoline and quinolone agents and, through structure-activity relationship studies, the candidate product ABBV-318. While Nav1.7 potency could be achieved with earlier compounds, efforts were required to improve characteristics including hERG activity, pharmacokinetics and selectivity over Nav1.5, yielding compounds which blocked Nav1.7 as well as another target for treating pain, Nav1.8.

Australian scientists have discovered promising new candidate analgesic molecules derived from a Penicillium fungus, which represents a promising resource for the development of safer new analgesics, they reported in the Oct. 14, 2019, edition of Proceedings of the National Academy of Sciences (PNAS).

Australian scientists have discovered promising new candidate analgesic molecules derived from a Penicillium fungus, which represents a promising resource for the development of safer new analgesics, they reported in the Oct. 14, 2019, edition of Proceedings of the National Academy of Sciences (PNAS).