Rapid pruritus reduction with ruxolitinib cream treatment in patients with atopic dermatitis

Topical Treatments in Atopic Dermatitis: An Expansive Review

Atopic dermatitis (AD) is a common inflammatory skin condition found worldwide. It impacts patient quality of life (QoL) and is thought to arise as an inflammatory response to epidermal barrier dysfunction and hypersensitivity. AD can lead to large out-of-pocket costs and increased healthcare expenses over a lifetime. An analysis of all randomized control trials conducted since 1990 on topical therapies for AD were reviewed, including 207 trials in the final analysis. It was found that an average of 226 patients were enrolled over 2.43 arms. Common topical treatments included corticosteroids, calcineurin inhibitors, JAK inhibitors, and phosphodiesterase inhibitors. The most utilized tools to identify treatment efficacy were the EASI, IGA, SCORAD, and PGA. There was a paucity of data on trials that evaluated efficacy, QoL, and cost of treatment simultaneously. This review highlights the need for comprehensive trials that evaluate multiple aspects of treatment, including financial cost and QoL impact, to ensure each patient has the best treatment modality for the management of their AD.

Current and emerging drugs for the treatment of pruritus: an update of the literature

INTRODUCTION

Pruritus, particularly in its chronic form, often imposes significant suffering and reductions in patients' quality of life. The pathophysiology of itch is varied depending on disease context, creating opportunities for unique drug development and multimodal therapy.

AREAS COVERED

The purpose of this article is to provide an update of the literature regarding current and emerging therapeutics in itch. We review the multitudes of drug targets available and corresponding drugs that have shown efficacy in clinical trials, with a particular emphasis on phase 2 and 3 trials and beyond. Broadly, these targets include therapies directed against type 2 inflammation (i.e. Th2 cytokines, JAK/STAT, lipid mediators, T-cell mediators, and other enzymes and receptors) and neural receptors and targets (i.e. PARs, TRP channels, opioid receptors, MRGPRs, GABA receptors, and cannabinoid receptors).

EXPERT OPINION

Therapeutics for itch are emerging at a remarkable pace, and we are entering an era with more and more specialized therapies. Increasingly, these treatments are able to relieve itch beyond their effect on inflammation by directly targeting the neurosensory system.

Satisfaction with Control of Mild to Moderate Atopic Dermatitis with Ruxolitinib Cream: US Physician and Patient Perspectives

INTRODUCTION

The 2021 US approval of ruxolitinib cream for treatment of atopic dermatitis (AD) in patients aged ≥ 12 years was based on the results of two pivotal phase 3 studies. Currently, real-world data to describe effectiveness of ruxolitinib cream and physician satisfaction with treatment remain limited. Our objective is to describe disease control among adults with mild to moderate AD prescribed ruxolitinib cream and physician satisfaction with treatment.

METHODS

Data were from the Adelphi AD Disease Specific Programme™, a US real-world, cross-sectional survey of physician-reported data, undertaken between August 2022 and March 2023. For patients aged ≥ 18 years, physicians reported patient demographics, clinical characteristics, treatment patterns, and physician satisfaction with disease control. Descriptive analysis of data for patients with mild to moderate AD prior to the initiation of ruxolitinib cream and treated with ruxolitinib cream for ≥ 1 month was undertaken.

RESULTS

Among physician-reported data from 1360 patients with AD, 149 patients had received ruxolitinib cream (in combination or as monotherapy) for ≥ 1 month, including 59 patients receiving monotherapy. Prior to treatment with ruxolitinib cream, 84.6% of patients had moderate AD (Investigator's Global Assessment, IGA of 3), whereas after treatment (median duration, 26 weeks), only 21.5% had an IGA of 3, with 48.3% of patients having clear or almost clear skin (IGA of 0/1). For these patients, 81.2% were not currently experiencing a flare, and physicians were satisfied with disease control for 87.3%. Results were similar in patients receiving monotherapy. The most frequent physician-reported reasons for prescribing ruxolitinib cream included relieving itch, improving lesion redness/thickness, achieving disease control, and reducing/controlling flares.

CONCLUSIONS

These real-world findings demonstrate effective disease control and physician satisfaction with ruxolitinib cream for the treatment of AD in adults in a clinical practice setting. Outcomes were similar whether ruxolitinib cream was prescribed as monotherapy or in combination regimens, suggesting a role for ruxolitinib cream across the spectrum of disease.

Clinically relevant improvements in adults and adolescents with atopic dermatitis who did not achieve Investigator's Global Assessment treatment success following 8 weeks of ruxolitinib cream monotherapy

Ruxolitinib cream is a topical formulation of ruxolitinib, a selective inhibitor of Janus kinase (JAK) 1 and JAK2. In two phase 3 studies in adults and adolescents (aged ≥12 years) with atopic dermatitis (AD; TRuE-AD1/TRuE-AD2), significantly more patients who applied ruxolitinib cream versus vehicle cream achieved Investigator's Global Assessment treatment success (IGA-TS; IGA score of 0/1 with ≥2-point improvement from baseline) at week 8 (primary endpoint). This post hoc analysis evaluated the efficacy, safety, and disease control of ruxolitinib cream in patients with AD who did not achieve IGA-TS at week 8. Patients in TRuE-AD1/TRuE-AD2 (N = 1249) were randomized 2:2:1 to apply twice-daily 0.75% ruxolitinib cream, 1.5% ruxolitinib cream, or vehicle cream for 8 weeks followed by a long-term safety period in which patients applied ruxolitinib cream as needed. In this pooled analysis, clinically meaningful response thresholds included ≥50% improvement in the Eczema Area and Severity Index, ≥2-point reduction in the Itch Numerical Rating Scale, ≥4-point improvement in the Dermatology Life Quality Index (DLQI) or ≥6-point improvement in Children's DLQI, and ≥1-point reduction in IGA from baseline. Among patients who did not achieve IGA-TS at week 8 (n = 584), significantly more patients who applied either strength ruxolitinib cream versus vehicle achieved each response threshold at week 8. A response in ≥1 clinically meaningful endpoint was achieved in significantly more patients who applied ruxolitinib cream (93.4%/90.9% for 0.75%/1.5% ruxolitinib cream, respectively) versus vehicle (69.0%, both P < 0.0001). Progressive improvements in disease control were observed, with many patients achieving IGA-TS by week 52 (55.2%/56.3% for 0.75%/1.5% ruxolitinib cream, respectively). Ruxolitinib cream was well tolerated during the 52-week study in this patient population. Taken together, these results demonstrate that most patients with AD who did not achieve IGA-TS at week 8 have clinically meaningful responses to ruxolitinib cream, and continued therapy beyond 8 weeks could result in additional benefit.

Ruxolitinib Cream 1.5%: A Review in Mild to Moderate Atopic Dermatitis

Ruxolitinib cream 1.5% (OPZELURA™) is a topical formulation of ruxolitinib, a potent, selective inhibitor of Janus kinase (JAK)1 and JAK2. The targeting of these kinases is associated with therapeutic benefits in patients with atopic dermatitis (AD). In two identically designed, multinational, phase III studies in patients aged ≥ 12 years with mild to moderate AD, ruxolitinib cream 1.5% improved measures of disease severity, pruritus and sleep disturbance relative to vehicle cream when applied twice daily for 8 weeks. Disease severity was controlled for the next 44 weeks when applied as needed to active lesions. Ruxolitinib cream 1.5% was well tolerated in this patient population; its safety profile was similar to that of vehicle cream over the short term, with the types of treatment-emergent adverse events typical of those seen in the vehicle-controlled period over the longer term. Moreover, application site treatment-emergent adverse events indicative of skin tolerability issues (e.g. stinging/burning sensation) were infrequent and no safety findings suggestive of systemic JAK inhibition were identified. Although further longer-term data would be of use, ruxolitinib cream 1.5% provides an alternative to established topical agents (e.g. corticosteroids and calcineurin inhibitors) for the treatment of mild to moderate AD in adults and adolescents.