Skin Clearance and PsA Prevention with Biologics in Psoriasis

In " Skin Clearance and PsA Prevention with Biologics in Psoriasis," Dr. Strober distills the discussion into practical guidance for the clinic.

Dr. Strober offers his practical takeaways, noting the crude psoriatic arthritis incidence across TIMs over three years is generally low. He believes any of these drugs likely helps prevent psoriatic arthritis, while acknowledging they are unlikely to be equal. Some classes will prove superior, he says, but he would not yet use these data to label IL-17 inhibitors inferior to IL-23 inhibitors. He does single out apremilast as lower-efficacy, and therefore less protective.

His central advice on treatment selection is to use a drug that is highly effective at clearing skin. He favors modern IL-23 and IL-17 inhibitors, reasoning that clearing skin covers most of the distance toward forestalling psoriatic arthritis. He points back to the CorEvitas registry finding that reaching a 1 percent body surface area target had a large preventive effect, suggesting treat-to-target alone captures much of the benefit.

On mechanism, Dr. Strober says both IL-23 and IL-17 inhibition are biologically plausible prevention strategies, as is TNF inhibition, and none clearly wins on theory. He stresses continued psoriatic arthritis screening at baseline and every visit, even when skin is clear, asking about swollen joints, morning stiffness, enthesitis, and tendonitis.

He compares the results with his 2024 analysis, which showed IL-23 inhibitors outperforming IL-17 and TNF agents; this newer work breaks results out by individual drug but remains hypothesis-generating. He tells patients that clearing skin may help prevent psoriatic arthritis, achieving two goals with one therapy. Finally, he frames psoriatic arthritis as a surrogate for cardiovascular risk, arguing that reducing systemic inflammation may also lower major adverse cardiovascular events, and reflects treating psoriasis as a systemic illness.

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