Discovery of a benzenesulfonamide-based dual inhibitor of microsomal prostaglandin E2 synthase-1 and 5-lipoxygenase that favorably modulates lipid mediator biosynthesis in inflammation
摘要:
Leukotrienes (LTs) and prostaglandin (PG)E-2, produced by 5-lipoxygenase (5-LO) and microsomal prostaglandin E-2 synthase-1 (mPGES-1), respectively, are key players in inflammation, and pharmacological suppression of these lipid mediators (LM) represents a strategy to intervene with inflammatory disorders. Previous studies revealed that the benzenesulfonamide scaffold displays efficient 5-LO-inhibitory properties. Here, we structurally optimized benzenesulfonamides which led to an N-phenyl-benzenesulfonamide derivative (compound 47) with potent inhibitory activities (IC50 = 2.3 and 0.4 mu M for isolated 5-LO and 5-LO in intact cells, respectively). Compound 47 prevented the interaction of 5-LO with its activating protein (FLAP) at the nuclear envelope in transfected HEK293 cells as shown by in situ proximity ligation assay. Comprehensive assessment of the LM profile produced by human macrophages revealed the ability of 47 to selectively down-regulate pro-inflammatory LMs (i.e. LTs and PGE(2)) in M1 but to enhance the formation of pro-resolving LMs (i.e. resolvins and maresins) in M2 macrophages. Moreover, 47 strongly inhibited LT formation and cell infiltration in two in vivo models of acute inflammation (i.e., peritonitis and air pouch sterile inflammation in mice). Together, 47 represents a novel LT biosynthesis inhibitor with an attractive pharmacological profile as anti-inflammatory drug that also promotes the biosynthesis of pro-resolving LM. (C) 2018 Elsevier Masson SAS. All rights reserved.
General cross-coupling reactions with adaptive dynamic homogeneous catalysis
作者:Indrajit Ghosh、Nikita Shlapakov、Tobias A. Karl、Jonas Düker、Maksim Nikitin、Julia V. Burykina、Valentine P. Ananikov、Burkhard König
DOI:10.1038/s41586-023-06087-4
日期:——
(AD-HoC) with nickel under visible-light-driven redox reaction conditions for general C(sp2)–(hetero)atom coupling reactions. The self-adjustive nature of the catalytic system allowed the simple classification of dozens of various classes of nucleophiles in cross-coupling reactions. This is synthetically demonstrated in nine different bond-forming reactions (in this case, C(sp2)–S, Se, N, P, B, O, C(sp3, sp2
作者:Hang Luo、Guohua Wang、Yunhui Feng、Wanyao Zheng、Lingya Kong、Yunpeng Ma、Shigeki Matsunaga、Luqing Lin
DOI:10.1002/chem.202202385
日期:2023.1.2
Exogenous photocatalyst-free, single nickel-catalyzed carbon–heteroatomcoupling under visible-light irradiation is reported. Over 15 classes of nucleophile can efficiently couple with aryl/alkene halides to afford valuable heteroatomic arenes/alkenes. The unprecedentedly broad substrate scope and late-stage modification of valuable molecules fully demonstrate the benefits of the method.