Resolvins are a family of potent lipid mediators derived from both eicosapentaenoic acid and docosahexaenoic acid .[1] In addition to being anti-inflammatory, resolvins promote the resolution of the inflammatory response back to a non-inflamed state. [2] Resolvin D2 (RvD2) is produced physiologically from the sequential oxygenation of DHA by 15- and 5-lipoxygenase and functions to dampen excessive neutrophil trafficking to sites of inflammation. [3] It reduces zymosan-stimulated PMN infiltration by 70% at doses as low as 10 pg per mouse and significantly reduces PAF-stimulated leukocyte adherence and emigration at 1 nM. Also, by stimulating nitric oxide production, RvD2 dose dependently decreases leukocyte-endothelial interactions. In a mouse model of sepsis, RvD2 reduces leukocyte and PMN infiltration, decreases production of pro-inflammatory cytokines, and promotes phagocyte-mediated bacterial clearance. Analytical and biological comparisons of synthetic RvD2 with endogenously derived RvD2 have confirmed its identity as matching the natural product. [4]

Reference：
[1]. Hong, S., Gronert, K., Devchand, P.R., et al. Novel docosatrienes and 17S-resolvins generated from docosahexaenoic acid in murine brain, human blood, and glial cells. Autacoids in anti-inflammation. J. Biol. Chem. 278(17), 14677-14687 (2003).
[2]. Ariel, A., and Serhan, C.N. Resolvins and protectins in the termination program of acute inflammation. TRENDS in Immunology 28(4), 176-183 (2007).
[3]. Spite, M., Norling, L.V., Summers, L., et al. Resolvin D2 is a potent regulator of leukocytes and controls microbial sepsis. Nature 461(7268), 1287-1291 (2009).
[4]. Serhan, C. . (2007).