A Phase 1 Study to Investigate the Effects of Cortexolone 17α-Propionate, Also Known as Clascoterone, on the QT Interval Using the Meal Effect to Demonstrate ECG Assay Sensitivity

Cortexolone 17α‐propionate, also known as clascoterone, is a potent androgen receptor inhibitor intended for the topical treatment of skin diseases associated with androgenic pathway alterations. In nonclinical studies, cortexolone 17α‐propionate was found to have a weak inhibitory effect on human Ether‐à‐go‐go‐Related Gene (hERG) potassium channels, which are vital for normal electrical activity in the heart. When used in a cream formulation, little cortexolone 17α‐propionate is absorbed. However, the solution formulation developed for the treatment of androgenetic alopecia leads to a measurable systemic concentration and accumulation of the antiandrogen. This phase 1 study assessed the effect of cortexolone 17α‐propionate on the QTc interval using concentration‐effect analysis and the effect of a meal on QTc to confirm assay sensitivity. Thirty‐two volunteers were randomly assigned to receive the active drug or a matching vehicle as placebo. Participants were dosed twice daily on days 1 to 3 (225 mg applied topically as a 7.5% solution 12 hours apart) and once on day 4. Pharmacokinetic and electrocardiogram assessments were performed after supratherapeutic doses. Assay sensitivity was successfully confirmed by using the food effect on the QTc interval. The results of this concentration‐QTc analysis demonstrate that cortexolone 17α‐propionate and its metabolite/degradation product had no effect on the QTc interval in the concentration range tested.

Clascoterone cream (1%) topical androgen receptor inhibitor for the treatment of acne in patients 12 years and older

INTRODUCTION

The efficacy of clascoterone cream was demonstrated in two phase three vehicle-controlled clinical trials that enrolled over 1,400 subjects. Its safety profile allowed it to be approved for treating patients as young as 12 years old. During clinical trials, the occurrence of local skin reactions (edema, erythema, pruritus, dryness) was similar to treatment with vehicle alone.

AREAS COVERED

All publications describing the clinical development of clascoterone cream (cortexolone 17α-propionate) are reviewed and discussed in relation to with existing topical and systemic therapies for acne vulgaris.

EXPERT OPINION

Clascoterone 1% cream is a novel first-in-class topical androgen receptor inhibitor for the treatment of acne vulgaris. Topical clascoterone 1% cream represents the first new type of therapy for acne treatment in almost 40 years and may become first-line therapy.

Efficacy and safety of topical clascoterone cream for treatment of acne vulgaris: A systematic review and meta-analysis of randomized placebo-controlled trials

To systematically and meta-analytically pool evidence from randomized placebo-controlled trials that examined the efficacy and safety of topical clascoterone cream in patients with acne vulgaris. Four databases were screened from inception to 10 October 2020. Included studies were assessed for risk of bias. Efficacy outcomes included investigator's global assessment (IGA) treatment success and absolute change in inflammatory lesion counts (ILCs) and noninflammatory lesion counts (NILCs). Safety outcomes included the proportion of patients with any treatment-emergent adverse event (TEAE) as well as incidence of any TEAE, serious adverse events (AEs), AEs related to study drug, AEs leading to study drug discontinuation, nasopharyngitis, headache, oropharyngeal pain, and vomiting. Dichotomous data were analyzed using the risk ratio (RR) and 95% confidence interval (95% CI) whereas continuous data were analyzed using the mean difference (MD) and 95% CI. Review Manager Software version 5.4.1 was used for statistical analysis. Five clinical trials, comprising 2457 patients (1357 and 1100 patients received clascoterone and placebo, respectively) were included. Studies revealed an overall low risk of bias. Clascoterone significantly increased IGA success rates (RR = 2.87, 95% CI [2.11, 3.89], P < .001) and decreased NILCs (MD = -5.64, 95% CI [-8.41, -2.87], P < .01) without substantially impacting the ILCs (MD = -1.82, 95% CI [-5.06, 1.43], P = .27). No significant differences were noted between both groups for all safety outcomes, except for nasopharyngitis which was significantly lower in the clascoterone group (RR = 0.47, 95% CI [0.27, 0.83], P = .01). Topical clascorterone cream is safe and effective in the treatment of acne vulgaris.