Novel benzoxanthene lignans that favorably modulate lipid mediator biosynthesis: A promising pharmacological strategy for anti-inflammatory therapy
作者:Jana Gerstmeier、Christian Kretzer、Simone Di Micco、Laura Miek、Hannah Butschek、Vincenza Cantone、Rossella Bilancia、Roberta Rizza、Fabiana Troisi、Nunzio Cardullo、Corrado Tringali、Armando Ialenti、Antonietta Rossi、Giuseppe Bifulco、Oliver Werz、Simona Pace
DOI:10.1016/j.bcp.2019.03.003
日期:2019.7
effects. Here, we report on the discovery and characterization of the two novel benzoxanthene lignans 1 and 2 that modulate select LM biosynthetic enzymes enabling the switch from pro-inflammatory LT to SPM biosynthesis as potential pharmacological strategy to intervene with inflammation. In cell-free assays, compound 1 and 2 inhibit microsomal prostaglandin E2 synthase-1 and leukotriene C4 synthase (IC50 ∼ 0
dichroism spectroscopy results suggest mixed binding mode, groove binding and partial intercalation, to ds-DNA/RNA and end-stacking to top or bottom G-tetrads as the main binding modes of BXLs to those targets. All compounds exhibited micromolar binding affinities toward HSA and an increased protein thermal stability. Moderate to strong antiradical scavenging activity was observed for all BXLs with hydroxy
The biological properties and possible pharmacological applications of benzo[kl]xanthene lignans, rare among natural products and synthetic compounds, are almost unexplored. In the present contribution, the possible interaction of six synthetic benzo[kl]xanthene lignans and the natural metabolite rufescidride with DNA has been investigated through a combined STD-NMR and molecular docking approach, paralleled by in vitro biological assays on their antiproliferative activity towards two different cancer cell lines: SW 480 and HepG2. Our data suggest that the benzo[kl]xanthene lignans are suitable lead compounds for the design of DNA selective ligands with potential antitumour properties.
The metal-mediated oxidative coupling of caffeic acid esters has been employed in the biomimeticsynthesis of dimeric lignans and neolignans. Phenethyl and methyl caffeate esters were used as substrates and MnO2, Mn(OAc)3 and Ag2O as oxidative coupling agents. The manganese-mediated reactions afforded in good yields the unusual benzo[kl]xanthene lignans 6 and 15 as the major products accompanied by
In this work we synthetized the bioinspired benzoxanthene lignans (BXLs)3,14-22, and the phenazine derivative23as potential antimycotic agents. MICs and MFCs againstCandidastrains were determined. In a preliminary screening, compounds3,15,20,21,22were substantially inactive. Compounds14and17showed antifungal activity, being able to inhibit the growth of the majority ofCandidastrains with MIC values in the range 4.6-19.2 mu M (14) and 26.0-104.3 mu M (17); for three strains, the MICs were lower than those obtained using the antimycotic drug fluconazole. The three BXLs18,19and23showed some MIC values lower than that of fluconazole;18was also active against two non-albicans Candidastrains resistant to fluconazole. Phenazine23, although active only against one strain (MIC = 1.3 mu M), was one order of magnitude more potent than fluconazole. All the BXLs were fungicidal.