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Microsomal prostaglandin E 2 synthase-1 (mPGES-1), the terminal enzyme responsible for the production of inducible prostaglandin E 2 , has become an attractive target for the treatment of inflammation and cancer pathologies. Starting from an aminobenzothiazole scaffold, used as an unprecedented chemical core for mPGES-1 inhibition, a Combinatorial Virtual Screening campaign was conducted, using the X-ray crystal structure of human mPGES-1. Two combinatorial libraries (6 × 10 4 ) were obtained by decorating the aminobenzothiazole scaffold with all acyl chlorides and boronates available at the Merck database. The scientific multidisciplinary approach included virtual screening workflow, synthesis, and biological evaluation and led to the identification of three novel aminobenzothiazoles 1 , 3 , and 13 acting as mPGES-1 inhibitors. The three disclosed hits are able to inhibit mPGES-1 in a cell-free system (IC 50 = 1.4 ± 0.2, 0.7 ± 0.1, and 1.7 ± 0.2 μM, respectively), and all are endowed with antitumoral properties against A549 human cancer cell lines at micromolar concentrations (28.5 ± 1.1, 18.1 ± 0.8, and 19.2 ± 1.3 μM, respectively).

Targeting mPGES-1 by a Combinatorial Approach: Identification of the Aminobenzothiazole Scaffold to Suppress PGE2 Levels

Targeting mPGES-1 by a Combinatorial Approach: Identification of the Aminobenzothiazole Scaffold to Suppress PGE₂ Levels