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Lipoxins, aspirin-triggered 15-epi-lipoxin stable analogs and their receptors in anti-inflammation: a window for therapeutic opportunity.

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  • 1Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Boston, MA, USA.


LXs and 15-epimer LXs are generated during cell-cell interactions that occur during multicellular host response to inflammation, tissue injury or host defense. Results indicate that they are present in vivo during human illness and carry predominantly counter-regulatory biological actions opposing the action of well-characterized mediators of inflammation that appear to lead to resolution of the inflammatory response or promotion of repair and wound healing. The first selective receptor of LXA4 was identified by direct ligand binding and was cloned and characterized. Its signaling involves a novel polyisoprenyl-phosphate pathway that directly regulates PLD (Levy et al. 1999a). LX- and 15-epimer-LX-stable analogs that resist metabolic inactivation were designed, synthesized and shown to be potent LX mimetics and novel topically active anti-inflammatory agents in animal models. These new investigational tools enable structure-function studies of LX signal transduction, further elucidation of the role of LX and 15-epimer LX in host responses and exploitation of their potent bioactions in the design of novel pharmacologic agents.

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