Phosphodiesterase 4 (PDE4) Inhibitors

Historically, drugs available for treating atopic dermatitis (AD) have been limited to topical corticosteroids (TCS) and topical calcineurin inhibitors (TCI), with systemic immunosuppressants and phototherapy reserved for severe AD. Despite their efficacy, with long term use, these agents have associated safety concerns and limitations. More targeted options with fewer systemic and cutaneous side effects are needed for treating atopic dermatitis. Phosphodiesterase 4 is involved in the regulation of proinflammatory cytokines via the degradation of cAMP.

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