【摘 要】
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Chronic inflammation results from excessive pro-inflammatory signaling and the failure to resolve the inflammatory reaction.Lipid mediators orchestrate both the initiation and resolution of inflammation.Switching from pro-inflammatory to pro-resolving lip
【机 构】
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Institute of Pharmacy/Pharmacognosy and Center for Molecular Biosciences Innsbruck (CMBI),University
论文部分内容阅读
Chronic inflammation results from excessive pro-inflammatory signaling and the failure to resolve the inflammatory reaction.Lipid mediators orchestrate both the initiation and resolution of inflammation.Switching from pro-inflammatory to pro-resolving lipid mediator biosynthesis is consid-ered as efficient strategy to relieve chronic inflanunation,though drug candidates exhibiting such features are unknown.Starting from a library of Vietnamese medical plant extracts,we identified isomers of the biflavanoid 8-methylsocotrin-4\'-ol from Dracaena cambodiana,which limit inflammation by targeting 5-lipoxygenase and switching the lipid mediator profile from leukotrienes to specialized pro-resolving me-diators (SPM).Elucidation of the absolute configurations of 8-methylsocotrin-4\'-ol revealed the 2S,γS-isomer being most active,and molecular docking studies suggest that the compound binds to an allosteric site between the 5-1ipoxygenase subdomains.We identified additional subordinate targets within lipid mediator biosynthesis,including microsomal prostaglandin E2 synthase-1.Leukotriene production is effi-ciently suppressed in activated human neutrophils,macrophages,and blood,while the induction of SPM biosynthesis is restricted to M2 macrophages.The shift from leukotrienes to SPM was also evident in mouse peritonitis in vivo and accompanied by a substantial decrease in immune cell infiltration.In sum-mary,we disclose a promising drug candidate that combines potent 5-1ipoxygenase inhibition with the favorable reprogramming of lipid mediator profiles.
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