2,5-dimethyl Celecoxib

2,5-dimethyl Celecoxib is a derivative of celecoxib (Item No. 10008672) that does not inhibit COX-2 (IC50 = >100 µM).{45305} It does inhibit microsomal prostaglandin E synthase-1 (mPGES-1) in HeLa cells (IC50 = 15.6 µM) and reduces prostaglandin E2 (PGE2; Item No. 14010) production in HeLa, A549, and HCA-7 cells (IC50s = 0.64, 0.83, and 3.08 µM, respectively).{45306} It inhibits proliferation of drug-sensitive RPMI8226 and multidrug-resistant 8226/Dox40 multiple myeloma cells, as well as increases the rate of apoptosis when used at concentrations of 20 and 30 µM.{45307} 2,5-dimethyl Celecoxib reduces the expression of survivin, cyclin A, cyclin B, MEK1, and MEK2 in 8226/Dox40 cells. The antiproliferative effect of 2,5-dimethyl celecoxib is independent of mPGES-1 inhibition.{45306}