Topical therapies show promise for Psoriasis

Psoriasis, a chronic skin condition characterized by thick, red, scaly patches that itch and bleed, not only makes the activities of daily life difficult, but also can affect a person's emotional well being.

Psoriasis affects more than 4.5 million adults in the United States with a large percentage of those patients living with mild or localized psoriasis, which in no way lessens the burden of this challenging skin condition. While new biologic treatments are available for patients with severe psoriasis, those with less severe psoriasis rely on topical therapies to manage their disease. In addition, some topical therapies that are approved for treating other skin conditions may be effective for the treatment of less severe psoriasis.

Speaking at the 64th Annual Meeting of the American Academy of Dermatology, dermatologist Linda Stein Gold, M.D., director of dermatology clinical research at the Henry Ford Health System in West Bloomfield, Mich., spoke about myths and misconceptions about the use of topical corticosteroids and some new topical treatment options for psoriasis.

"Topical treatments, such as corticosteroids, are considered the first line of treatment," said Dr. Stein Gold. "With the emergence of several new therapies, more people with psoriasis are experiencing substantial improvements and reporting a greatly enhanced quality of life."

Recent research has shown that calcineurin inhibitors (TCIs), such as tacrolimus ointment and pimecrolimus cream, may be effective in treating psoriasis, although they are currently only approved by the U.S. Food and Drug Administration (FDA) for the treatment of atopic dermatitis, another chronic skin condition in which the skin becomes itchy, dry and inflamed. TCIs interfere with the activation of T-cells, a type of white blood cell responsible for triggering immune responses that contribute to the development of skin conditions such as atopic dermatitis and psoriasis.

"In clinical trials, pimecrolimus and tacrolimus showed promise in treating facial psoriasis and inverse psoriasis, which is characterized by smooth, red lesions in the skin folds," stated Dr. Stein Gold. "Tacrolimus in the gel form is currently in clinical trials for the treatment of body psoriasis. Side effects tend to be mild and include minor itching and a sensation of warmth after application."

Another new topical medication that has been approved by the FDA to treat moderate to severe plaque psoriasis is clobetasol propionate spray. In spray form, clobetasol propionate penetrates the skin easily to diminish the psoriasis plaques and minimize inflammation. In a recent study, patients using the clobetasol propionate spray over a four-week period saw a marked decrease in their disease severity, with most patients considering their psoriasis clear or almost clear by week four. In follow-up interviews after the completion of the study, the greatest proportion of patients still considered their psoriasis to be clear or almost clear.