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J Eur Acad Dermatol Venereol. 2011 Dec;25(12):1402-8. doi: 10.1111/j.1468-3083.2011.03984.x. Epub 2011 Feb 23.

Treatment of palmoplantar psoriasis with infliximab: a randomized, double-blind placebo-controlled study.

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1
Innovaderm Research Inc., Sherbrooke est, Montreal, QC, Canada. rbissonnette@innovaderm.ca

Abstract

BACKGROUND:

Palmoplantar psoriasis is a difficult to treat variant of plaque psoriasis.

OBJECTIVE:

To study the safety and efficacy of infliximab in non-pustular palmoplantar psoriasis.

METHODS:

Patients with non-pustular palmoplantar psoriasis affecting at least 10% of their palms and soles and with a modified palmoplantar psoriasis area and severity index (m-PPPASI) of at least eight were recruited. Patients were randomized (1:1) to receive infliximab 5 mg/kg or placebo at weeks 0, 2 and 6. Patients initially randomized to placebo received infliximab at weeks 14, 16 and 20 whereas patients randomized to infliximab received additional infliximab infusions every 8 weeks until week 22.

RESULTS:

Twenty four (24) patients were randomized in this study. At week 14, 33.3% and 66.7% of patients treated with infliximab achieved m-PPPASI 75 and m-PPPASI 50 respectively compared to 8.3% for both m-PPPASI 75 (P = 0.317) and m-PPPASI 50 (P = 0.009) for patients randomized to placebo. A reduction of 50.3% in the mean surface area of palms and soles affected with psoriasis was seen at week 14 in patients randomized to infliximab as compared to an increase of 14.9% in patients randomized to placebo (P = 0.009).

CONCLUSIONS:

This pilot study did not reach its primary endpoint of m-PPPASI 75 at week 14. However, infliximab was observed to be more efficacious than placebo in improving PPSA and with respect to the percentage of patients reaching m-PPPASI 50 at week 14. Larger and longer term studies are needed for severe patients to better assess the efficacy of infliximab in palmoplantar psoriasis.

[Indexed for MEDLINE]

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