Antimicrobial and Anti-Lipase Activity of Quercetin and its C2-C16 3-O-Acyl-Esters
作者:Maria Teresa Gatto、Serena Falcocchio、Eleonora Grippa、Gabriela Mazzanti、Lucia Battinelli、Giovanni Nicolosi、Daniela Lambusta、Luciano Saso
DOI:10.1016/s0968-0896(01)00275-9
日期:2002.2
Neither quercetin (Q). nor 3-Ow-acylquercetines, up to 100 mug/mL, had any significant activity on selected gram-positive strains (Staphylococcus aureus, Bacillus subtilis, Listeria ivanovi, Listeria monocytogenes, Listeria serligeri), gram-negative strains (Escherichia coli, Shigella flexneri, Shigella sonnei, Salmonella enteritidis, Salmonella tiphymurium) and yeasts (Candida albicans and Candida glabrata). In addition, we confirmed the known anti-HIV activity of Q (80% inhibition at 40 muM), which might depend on the free hydroxyl in the C-3 position, as suggested by the lack of activity of the 3-O-acylquercetines. Finally, we described an interesting inhibitory activity on Candida rugosa lipase by Q (IC16 = 10(-4) M) and its esters (3-O-acylquercetines) which, in vivo, could play an important role against lipase producing microorganisms. In particular, 3-O-acyl-quercetines, being more active (IC16 = 10(-4)-10(-6) M) and more lipophilic, could be more effective than Q when applied to the skin or mucosae, and deserve to be studied further. (C) 2001 Elsevier Science Ltd. All rights reserved.