Inhibition of respiratory burst in human neutrophils and lipoxygenase enzyme by compounds from Haloxylon griffithii

Secondary metabolites, ferulic acid (1), 2,6-dimethoxy-4-hydroxy acetophenone (2), herniarin (3), p-hydroxy acetophenone (4), methyl 3,4-dihydroxycinnamate (5), and methyl 4-hydroxy-3-methoxycinnamate (6) were isolated from Haloxylon griffithii, a member of the family Chenopodiaceae. The structures of compounds 1-6 were identified with the help of spectroscopic techniques. These compounds were isolated for the first time from this plant. The lipoxygenase and respiratory burst inhibitory activities were determined. Compound 5 was found to be the most potent inhibitory activity against respiratory burst in human neutrophils among all the compounds as well as exhibited moderate lipoxygenase inhibitory activity from this plant.