Assessment of potential predictive factors of dupilumab response in patients with moderate-to-severe atopic dermatitis

BACKGROUND

Dupilumab has shown to be an effective and safe treatment for patients with moderate-to-severe atopic dermatitis (AD).

OBJECTIVE

To evaluate the predictive factors of response (PRF) in patients with moderate-to-severe AD treated with dupilumab.

METHODS

Observational, retrospective and multicentre study conducted on adult patients diagnosed with moderate-to-severe AD treated with dupilumab, with a post-treatment follow-up of at least 16 weeks. The primary endpoints were EASI-75 and the IGA scale at week 52.

RESULTS

A total of 198 patients were included in the analysis. Mean age was 38 ± 15.1 years and 116 (58.6%) were men. The most prevalent AD-predominant phenotypes were flexural eczema (45.3%), head-and-neck eczema (18.2%) and erythroderma (17.7%). At week 52, 140 (86.4%) patients achieved EASI-75 and 119 (93.0%) achieved an improvement in ≥2 points from baseline in IGA score. Women were 3.6 times more likely to achieve EASI-75 response than men (Odds ratio: 3.58; p = 0.020). While increased body mass index significantly reduced the probability of obtaining an improvement of ≥2 points in the IGA scale at week 52 (odds ratio: 0.88; p = 0.049).

CONCLUSIONS

Dupilumab was an effective treatment in patients with moderate-to-severe AD. Additionally, sex and body mass index were significantly associated with achieving EASI-75 and an improvement of ≥2 points in the IGA scale, respectively, at week 52.

Algorithm for Treatment of Chronic Spontaneous Urticaria with Omalizumab

BACKGROUND AND OBJECTIVE

Pivotal trials with omalizumab for treatment of chronic spontaneous urticaria (CSU) are generally run over 12 to 24weeks. However, in clinical practice, many patients need longer treatment. In this article, we present an algorithm for treatment with omalizumab.

MATERIAL AND METHODS

The consensus document we present is the result of a series of meetings by the CSU working group of "Xarxa d'Urticària Catalana i Balear" (XUrCB) at which data from the recent literature were presented, discussed, compared, and agreed upon.

RESULTS

Treatment with omalizumab should be initiated at the authorized dose, and is adjusted at 3-monthly intervals according to the Urticaria Activity Score Over 7days, the Urticaria Control Test, or both.

CONCLUSIONS

The algorithm proposed is designed to provide guidance on how to adjust omalizumab doses, how and when to discontinue the drug, and how to reintroduce it in cases of relapse.

Long-term study of infliximab for psoriasis in daily practice: drug survival depends on combined treatment, obesity and infusion reactions

BACKGROUND

Infiximab has been shown to be highly effective in phase III clinical trials, but limited information is available regarding drug survival and maintenance of efficacy beyond 1 year in real-life clinical setting.

OBJECTIVES

To analyse the efficacy and safety of infliximab in a large number of patients with a long follow-up and to identify clinical factors associated with long-term drug survival.

METHODS

A retrospective review of patients with moderate-to-severe psoriasis treated with infliximab from March 2004 to August 2012 at a tertiary dermatology centre was carried out.

RESULTS

In total, 63 treatment courses with infliximab were administered to 56 patients. The mean duration of treatment was 31.6 months. The only significant positive predictor of drug survival was combination treatment [hazard ratio (HR) vs. monotherapy 2.90, 95% confidence interval (CI) 1.42–5.92]. Significant negative predictors of drug survival were obesity (HR 0.40, 95% CI 0.19–0.87) and infusion reactions (HR 0.40, 95% CI 0.19–0.87). Infusion reactions occurred in 13 (23%) of our patients and were a reason for discontinuation of treatment in 5.

CONCLUSIONS

This retrospective review of a cohort of patients with moderate-to-severe psoriasis treated with infliximab in daily practice shows that the PASI75 response rates at 24 and 52 weeks of treatment are similar to those of the pivotal studies, but 37 courses of treatment (59%) had to be discontinued after a median of 12 months. The major cause for discontinuation was loss of response, in 18 cases. Combination treatment, obesity and infusion reactions were found to be predictors of drug survival.