Withaferin A ameliorates psoriasis-like skin lesions by suppressing oxidative stress in keratinocytes.

Psoriasis is a chronic disease with elusive pathogenesis linked to genetic, and immune factors. Studies have shown most patients have experienced high levels of oxidative stress, which can lead to inflammation or damage. Withaferin A is a natural product with multiple pharmacological activities, including anti-tumor and anti-inflammatory effects. We investigated the effects of WA in treating Imiquimod (IMQ)-induced psoriasis mice. The epidermal pathology of mice was significantly improved after treatment. WA inhibited inflammation by decreasing the production of IL-1β, IL-6, and IFN-γ, which were induced by epidermal oxidative stress. Additionally, WA can shift the macrophage status from pro-inflammatory to anti-inflammatory.