Inhibitory effect of β-diketones and their metal complexes on TNF-α induced expression of ICAM-1 on human endothelial cells
作者:Francesco Caruso、Claudio Pettinari、Fabio Marchetti、Miriam Rossi、Cristian Opazo、Sarvesh Kumar、Sakshi Balwani、Balaram Ghosh
DOI:10.1016/j.bmc.2009.07.064
日期:2009.9.1
Recent reports show that the natural beta-diketone curcumin displays important biological properties regarding the intercellular adhesion molecule-1 (ICAM-1), which plays a critical role in the immune responses and inflammation. In this study the ICAM-1 inhibitory activity of beta-diketone compounds, which are curcumin models lacking aromatic peripheral hydroxyl and methoxy groups, along with some metal derivatives is investigated. beta-Diketones are systematically more active than metal complexes and the best obtained inhibition is 75% for both groups. The best inhibitors are 4-benzoyl-3-methyl-1-phenyl-pyrazol- 5-one (HQ(Ph)) among the ligands, and sodium benzoylacetonato among metal derivatives. These results appear in line with the reported antitumor activity of related species. Since 4-acyl-5-pyrazolones posses four tautomeric forms, those corresponding to HQ(Ph) were investigated using density functional theory. Docking of all HQ(Ph) tautomers on ICAM-1 protein was performed suggesting one keto-enol form favored to act in biological environment. (C) 2009 Elsevier Ltd. All rights reserved.