Arita, MakotoOh, Sungwhan F.Chonan, TomomichiHong, SongElangovan, SivaSun, Yee-PingUddin, JasimPetasis, Nicos A.Serhan, Charles N.2019-10-052006Arita, Makoto, Sungwhan F. Oh, Tomomichi Chonan, Song Hong, Siva Elangovan, Yee-Ping Sun, Jasim Uddin, Nicos A. Petasis, and Charles N. Serhan. 2006. “Metabolic Inactivation of Resolvin E1 and Stabilization of Its Anti-Inflammatory Actions.” Journal of Biological Chemistry 281 (32): 22847–54. https://doi.org/10.1074/jbc.m603766200.0021-92581083-351Xhttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41483520The resolvins (Rv) are lipid mediators derived from omega-3 polyunsaturated fatty acids that act within a local inflammatory milieu to stop leukocyte recruitment and promote resolution. Resolvin E1 (RvE1; (5S, 12R, 18R)-trihydroxy-6Z, 8E, 10E, 14Z, 16E-eicosapentaenoic acid) is an oxygenase product derived from omega-3 eicosapentaenoic acid that displays potent anti-inflammation/pro-resolution actions in vivo. Here, we determined whether oxidoreductase enzymes catalyze the conversion of RvE1 and assessed the biological activity of the RvE1 metabolite. With NAD(+) as a cofactor, recombinant 15-hydroxyprostag-landin dehydrogenase acted as an 18-hydroxyl dehydrogenase to form 18-oxo-RvE1. In the murine lung, dehydrogenation of the hydroxyl group at carbon 18 position to form 18-oxo-RvE1 represented the major initial metabolic route for RvE1. At a concentration where RvE1 potently reduced polymorphonuclear leukocyte (PMN) recruitment in zymosan-induced peritonitis, 18-oxo-RvE1 was devoid of activity. In human neutrophils, carbon 20 hydroxylation of RvE1 was the main route of conversion. An RvE1 analog, i.e. 19-(p-fluorophenoxy)-RvE1, was synthesized that resisted rapid metabolic inactivation and proved to retain biological activity reducing PMN infiltration and pro-inflammatory cytokine/chemokine production in vivo. These results established the structure of a novel RvE1 initial metabolite, indicating that conversion of RvE1 to the oxo product represents a mode of RvE1 inactivation. Moreover, the designed RvE1 analog, which resisted further metabolism/inactivation, could be a useful tool to evaluate the actions of RvE1 in complex disease models.en-USJournal Article2019-10-0510.1074/jbc.M603766200