Inhibition of leukotriene biosynthesis by quinolone alkaloids from the fruits of Evodia rutaecarpa.
The n-hexane extract of the fruits of Evodia rutaecarpa showed a considerable inhibiting effect on leukotriene biosynthesis in human granulocytes. Bioassay-guided fractionation of the extract led to the isolation of the 5 quinolone alkaloids: 1-methyl-2-nonyl-4(1H)-quinolinone, 1-methyl-2-(6Z)-6-undecenyl-4(1H)-quinolinone, 1-methyl-2-(4Z,7Z)-4,7-tridecadienyl-4(1H)-quinolinone, evocarpine and 1-methyl-2-(6Z,9Z)-6,9-pentadecadienyl-4(1H)-quinolinone. The compounds exhibited inhibitory activity on leukotriene biosynthesis in a bioassay using human polymorphonuclear granulocytes, with IC50 values of 12.1, 10.0, 10.1, 14,6 and 12.3 microM, respectively. Structure elucidation of the compounds was achieved by 1D and 2D NMR experiments and comparison of spectral data with literature data.
Adams
Michael
M
Institute of Pharmaceutical Sciences, Department of Pharmacognosy, Karl-Franzens-Universität Graz, Austria.
Kunert
Olaf
O
Haslinger
Ernst
E
Bauer
Rudolf
R
D032086:Evodia; D005638:Fruit; D006098:Granulocytes / Q000187:drug effects / Q000378:metabolism; D006801:Humans; D020128:Inhibitory Concentration 50; D015289:Leukotrienes / Q000096:biosynthesis*; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D015363:Quinolones / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use
D015289:Leukotrienes; D010936:Plant Extracts; D015363:Quinolones