Beginning on study day 0, and continuing every other day until study day 20, mice will be anesthetized with Isoflurane and have 20^1 of PBS with 0.5|ig of recombinant mouse lL-23 injected in the pinna of the right ear.
It is assumed that this model causes only minimal to mild pain in one of the rodent’s ears. Redness, some inflammation, hyperplasia and scabbing may occur for the duration of the 21 day study. Animals will be monitored daily, however it is highly unlikely that the disease will be severe enough to trigger euthanasia. Any animals displaying signs of distress will enrolled in the Health Monitoring Program and the Health Assessment scoring system will determine euthanasia.
Route of administration: SC, PO, IP, IV
On study days 0 (baseline) 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 and 21 the thickness of the both ears will be measured using a mechanical caliper. The left ear will be used as an animal control.
Psoriasis is one of the most common immune-mediated chronic inflammatory skin disorders in adults, affecting ~2% of Caucasian individuals’. While an underlying genetic component to the disease has been acknowledged for many years’”^, important aspects of the complex autoimmune inflammatory mechanisms involved in the pathogenesis of psoriasis are still poorly understood. It is our hope that this model will allow us to help customers identify novel treatments for this condition.