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Efficacy of spesolimab for the treatment of generalized pustular psoriasis flares across pre-specified patient subgroups in the Effisayil 1 study

Burden AD, Okubo Y, Zheng M, Thaçi D, van de Kerkhof P, Hu N, et al.

Exp Dermatol, 2023 Aug;32(8):1279-1283.
PMID: 37140190 DOI: 10.1111/exd.14824

Effisayil 1 was a multicentre, randomized, double-blind, placebo-controlled study of the anti-interleukin (IL)-36 receptor monoclonal antibody, spesolimab, in patients presenting with a generalized pustular psoriasis (GPP) flare. Previously published data from this study revealed that within 1 week, rapid pustular and skin clearance were observed in patients receiving spesolimab versus placebo. In this pre-specified subgroup analysis, the efficacy of spesolimab was evaluated according to patient demographic and clinical characteristics at baseline in patients receiving spesolimab (n = 35) or placebo (n = 18) on Day 1. Efficacy was by assessed by achievement of primary endpoint (Generalized Pustular Psoriasis Physician Global Assessment [GPPGA] pustulation subscore of 0 at Week 1) and key secondary endpoint (GPPGA total score of 0 or 1 at Week 1). Safety was assessed at Week 1. Spesolimab was found to be efficacious and had a consistent and favourable safety profile in patients presenting with a GPP flare, regardless of patient demographics and clinical characteristics at baseline.
Fulltext Efficacy and safety of spesolimab in Asian patients with a generalized pustular psoriasis flare: Results from the randomized, double-blind, placebo-controlled Effisayil™ 1 study

Morita A, Tsai TF, Yee EYW, Okubo Y, Imafuku S, Zheng M, et al.

J Dermatol, 2023 Feb;50(2):183-194.
PMID: 36282833 DOI: 10.1111/1346-8138.16609

Generalized pustular psoriasis is a potentially life-threatening neutrophilic skin disease characterized by recurrent flares of widespread erythema and eruption of sterile pustules. In the Effisayil™ 1 study (NCT03782792), 53 patients with a generalized pustular psoriasis flare were treated with placebo or spesolimab, a humanized anti-interleukin-36 receptor monoclonal antibody, the first targeted treatment to be studied in a randomized clinical trial. Spesolimab treatment resulted in rapid pustular and skin clearance, with an acceptable safety profile. Here, we evaluate the efficacy and safety of spesolimab in 29 Asian patients in the Effisayil™ 1 study. The primary endpoint, a Generalized Pustular Psoriasis Physician Global Assessment (GPPGA) pustulation subscore of 0 (no visible pustules) at Week 1, was achieved by 10 patients (62.5%) randomized to spesolimab and one patient (7.7%) randomized to placebo (risk difference 54.8, 95% confidence interval [CI] 17.3-79.8). The key secondary endpoint, a GPPGA total score of 0 or 1 (clear or almost clear skin) at Week 1, was achieved by eight (50.0%) and two (15.4%) patients, respectively (risk difference 34.6, 95% CI -3.1-64.7). This was similar to previously published data in the overall population in whom the primary and key secondary endpoints were achieved by 54% versus 6% and 43% versus 11% of patients, respectively. The percentages of Asian patients randomized to spesolimab with a GPPGA pustulation subscore of 0 and GPPGA total score of 0 or 1 were sustained above 60% for up to 12 weeks. In these patients, patient-reported outcomes also improved and markers of systemic inflammation were normalized. Eleven (68.8%) and eight (61.5%) of spesolimab- and placebo-treated patients, respectively, experienced at least one adverse event. In conclusion, spesolimab improved outcomes in Asian patients compared with placebo, supporting its use in the treatment of generalized pustular psoriasis flares.
Fulltext Clinical Characteristics and Outcomes of Generalized Pustular Psoriasis Flares

Choon SE, Lebwohl MG, Turki H, Zheng M, Burden AD, Li L, et al.

Dermatology, 2023;239(3):345-354.
PMID: 36796336 DOI: 10.1159/000529274

BACKGROUND: Generalized pustular psoriasis (GPP) is a rare, neutrophilic skin disease that can become life-threatening if flares are untreated. There are limited data describing the characteristics and clinical course of GPP disease flares with current treatment options.
OBJECTIVE: The aim of the study was to describe the characteristics and outcomes of GPP flares using historical medical information from patients enrolled in the Effisayil™ 1 trial.
METHODS: Investigators collected retrospective medical data characterizing patients' GPP flares prior to clinical trial enrollment. Data on overall historical flares were collected, as well as information on patients' typical, most severe, and longest past flares. This included data on systemic symptoms, flare duration, treatment, hospitalization, and time to clearance of skin lesions.
RESULTS: In this cohort (N = 53), patients with GPP experienced a mean of 3.4 flares per year. Flares were painful, associated with systemic symptoms, and often triggered by stress, infections, or treatment withdrawal. Resolution of flares was longer than 3 weeks in 57.1%, 71.0%, and 85.7% of documented (or identified) typical, most severe, and longest flares, respectively. GPP flares led to patient hospitalization in 35.1%, 74.2%, and 64.3% of patients for their typical, most severe, and longest flares, respectively. For the majority of patients, pustules took up to 2 weeks to clear for a typical flare and 3-8 weeks to clear for the most severe and longest flares.
CONCLUSION: Our findings highlight that current treatment options are slow to control GPP flares and provide context for assessing the efficacy of new therapeutic strategies in patients with a GPP flare.

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