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Zusammenfassung
Four polyacetylenes atractylodin, acetylatractylodinol, 1-(2-furyl)-(7E)-nonene-3,5-diyne-1,2-diacetate, erythro-(1,5E, 11E)-tridecatriene-7,9-diyne-3,4-diacetate,as well as atractylochromene (I) and 2-[(2E)-3,7-dimethyl-2,6-octadienyl]-6-methyl-2,5-cyclohexadiene-1,4-dione (II) isolated from the rhizomes of Atractylodes lancea were evaluated for their antioxidant activity ex vivo. When measuring ...
Zusammenfassung
Four polyacetylenes atractylodin, acetylatractylodinol, 1-(2-furyl)-(7E)-nonene-3,5-diyne-1,2-diacetate, erythro-(1,5E, 11E)-tridecatriene-7,9-diyne-3,4-diacetate,as well as atractylochromene (I) and 2-[(2E)-3,7-dimethyl-2,6-octadienyl]-6-methyl-2,5-cyclohexadiene-1,4-dione (II) isolated from the rhizomes of Atractylodes lancea were evaluated for their antioxidant activity ex vivo. When measuring the inhibition of luminal enhanced chemiluminescence in stimulated human neutrophils, only the chromene I and the quinone II showed strong antioxidant activity. After stimulation with FMLP or opsonized zymosan (OZ) both compds. exhibited comparable inhibitory effects (IC50 I = 1.3 micro M (FMLP), 5.6 micro M (OZ); IC50 II = 1.1 micro M (FMLP), 5.4 micro M (OZ)). In contrast, I was considerably more active in a cell free in vitro assay with H2O2 and horseradish peroxidase (IC50 = 4.9 micro M I, 11 micro M II).
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