Example 28
IL-23 Injection Model of Mouse Skin Inflammation
Ears from BALB/c mice were each injected intra-dermally every other day with 150 ng of mouse recombinant IL-23 (eBiosciences) or PBS in a total volume of 25 μl. Ear swelling was measured in triplicate using a micrometer (Mitutoyo) right before each IL-23 challenge. On Day 14, mice were euthanized and ears were collected for measurement of cytokine levels, gene expression levels and hystopathological evaluation. Mice were administered 3-100 mg/kg of an RORC2 modulator or vehicle once daily orally for the duration of the study. Alternatively, the RORC2 modulator was applied topically once or twice daily using a standard formulation (EtOH:propylene glycol:dimethyl isosorbide:DMSO, 38:30:15:15) at a concentration of 0.1% to 5.0%.
References describing aspects of this assay include: Muramoto, K. et al. J. Pharmacol. Exp. Ther. 2010, 335(1), 23-31; Fridman, J. S. et al. J. Invest. Dermatol. 2011, 131(9), 1838-1844.