Landa P., Kutil Z., Temml V., Malík J., Kokoška L., Widowitz U., Přibylová M., Dvořáková M., Maršík P., Schuster D., Bauer R., Vaněk T.
NATURAL PRODUCT COMMUNICATIONS
8:
105-108,
2013
Keywords:
5-Lipoxygenase, Anti-inflammatory activity, Dual COX/LOX inhibition, Natural compounds, Molecular docking
Abstract:
Quinones are compounds frequently contained in medicinal plants used for the treatment of inflammatory diseases. Therefore, the impact of plant-derived quinones on the arachidonic acid metabolic pathway is worthy of investigation. In this study, twenty-three quinone compounds of plant origin were tested in vitro for their potential to inhibit leukotriene B4 (LTB4) biosynthesis in activated human neutrophil granulocytes with 5-lipoxygenase (5-LOX) activity. The benzoquinones primin (3) and thymohydroquinone (4) (IC50 = 4.0 and 4.1 μM, respectively) showed activity comparable with the reference inhibitor zileuton (IC50 = 4.1 μM). Moderate activity was observed for the benzoquinone thymoquinone (2) (IC50 = 18.2 μM) and the naphthoquinone shikonin (1) (IC50 = 24.3 μM). The anthraquinone emodin and the naphthoquinone plumbagin (5) displayed only weak activities (IC50 > 50 μM). The binding modes of the active compounds were further evaluated in silico by molecular docking to the human 5-LOX crystal structure. This process supports the biological data and suggested that, although the redox potential is responsible for the quinone’s activity on multiple targets, in the case of 5-LOX the molecular structure plays a vital role in the inhibition. The obtained results suggest primin as a promising compound for the development of dual COX-2/5-LOX inhibitors.
IEB authors: Marcela Dvořáková,
Přemysl Landa,
Petr Maršík,
Marie Přibylová,
Tomáš Vaněk,
bývalý zaměstnanec
Čeština
English