Novel series of benzoquinones with high potency against 5-lipoxygenase in human polymorphonuclear leukocytes.
Basic Information
ID: ALA3414543
Journal: Eur J Med Chem
Title: Novel series of benzoquinones with high potency against 5-lipoxygenase in human polymorphonuclear leukocytes.
Authors: Filosa R, Peduto A, Schaible AM, Krauth V, Weinigel C, Barz D, Petronzi C, Bruno F, Roviezzo F, Spaziano G, D'Agostino B, De Rosa M, Werz O.
Abstract: 5-Lipoxygenase (5-LO) is a potential target for pharmacological intervention with various inflammatory and allergic diseases. Starting from the natural dual 5-LO/microsomal prostaglandin E2 synthase (mPGES)-1 inhibitor embelin (2,5-dihydroxy-3-undecyl-1,4-benzoquinone, 2) that suppresses 5-LO activity in human primary leukocytes with IC50 = 0.8-2 μM, we synthesized 48 systematically modified derivatives of 2. We modified the 1,4-quinone to 1,2-quinone, mono- or bimethylated the hydroxyl groups, and varied the C11-n-alkyl residue (C4- to C16-n-alkyl or prenyl) of 2. Biological evaluation yields potent analogues being superior over 2 and obvious structure-activity relationships (SAR) for inhibition of 5-LO. Interestingly, conversion to 1,2-benzoquinone and bimethylation of the hydroxyl moieties strongly improves 5-LO inhibition in polymorphonuclear leukocytes versus 2 up to 60-fold, exemplified by the C12-n-alkyl derivative 22c (4,5-dimethoxy-3-dodecyl-1,2-benzoquinone) with IC50 = 29 nM. Regarding inhibition of mPGES-1, none of the novel benzoquinones could outperform the parental compound 2 (IC50 = 0.21 μM), and only modest suppressive effects on 12- and 15-LOs were evident. Together, our detailed SAR study reveals 22c as highly potent 5-LO-selective lead compound in intact cells that warrants further preclinical evaluation as anti-inflammatory agent.
CiteXplore: 25765759
DOI: 10.1016/j.ejmech.2015.02.042
Patent ID: ┄