Kinetics of 15d-PGJ2 in the serum of the mice. Mice received subcutaneous injections of 15d-PGJ2-NC or unloaded 15d-PGJ2. After 1, 2, 4, 8, 12 and 24 h, a set of five animals from each group were killed and the concentration of 15d-PGJ2 in the serum measured by enzyme-linked immunosorbent assay. The values are expressed as ng·mL−1.