Thirty-five Balb/c male mice were left without treatment, or were received topical application of imiquimod (IMQ, 3.125 mg/mouse) to induce psoriasis-like skin inflammation, and then the mice were treated with intraperitoneal (i.p.)injection of 100 μL containing anti-IL-2/IL-2 complex (2.5 μg /0.5 μg/mouse), or topical steroids (62.50 mg/mouse), or low dose of free IL-2 (i.p.; 0.5 μg/mouse). Here, IL2 is linked to psoriasis.