A novel rapamycin cream formulation improves facial angiofibromas associated with tuberous sclerosis complex: a double-blind randomized placebo-controlled trial.
Br J Dermatol
; 189(5): 520-530, 2023 10 25.
Article
em En
| MEDLINE
| ID: mdl-37463422
ABSTRACT
BACKGROUND:
Facial angiofibromas (FAs) are a major feature of tuberous sclerosis complex (TSC). Topical rapamycin can successfully treat FAs. A new stabilized cream formulation that protects rapamycin from oxidation has been developed in 0.5% and 1% concentrations.OBJECTIVES:
To assess the efficacy and safety of a novel, stabilized topical rapamycin cream formulation.METHODS:
This multicentre double-blind randomized placebo-controlled dose-response phase II/III study with a parallel design included participants aged 6-65â years with FAs of mild or moderate severity according to the Investigator's Global Assessment (IGA) scale. Participants were randomized to one of three treatment arms topical rapamycin 0.5%, topical rapamycin 1% or placebo. Treatment was applied once daily for 26 weeks. Safety and efficacy measures were assessed at days 14, 56, 98, 140 and 182. The primary endpoint was the percentage of participants achieving IGA scores of 'clear' or 'almost clear' after 26 weeks of treatment. Secondary measures included Facial Angiofibroma Severity Index (FASI) and participant- and clinician-reported percentage-based improvement. Safety measures included the incidence of treatment-emergent adverse events and blood rapamycin concentration changes over time.RESULTS:
Participants (n = 107) were randomized to receive either rapamycin 1% (n = 33), rapamycin 0.5% (n = 36) or placebo (n = 38). All treated participants were included in the final analysis. The percentage of participants with a two-grade IGA improvement was greater in the rapamycin 0.5% treatment group (11%) and rapamycin 1% group (9%) than in the placebo group (5%). However, this was not statistically significant [rapamycin 0.5% odds ratio (OR) 1.71, 95% confidence interval (CI) 0.36-8.18 (P = 0.50); rapamycin 1% OR 1.68, 95% CI 0.33-8.40 (P = 0.53)]. There was a statistically significant difference in the proportion of participants treated with rapamycin cream that achieved at least a one-grade improvement in IGA [rapamycin 0.5% 56% (OR 4.73, 95% CI 1.59-14.10; P = 0.005); rapamycin 1% 61% (OR 5.14, 95% CI 1.70-15.57; P = 0.004); placebo 24%]. Skin adverse reactions were more common in patients following rapamycin application (64%) vs. placebo (29%).CONCLUSIONS:
Both rapamycin cream formulations (0.5% and 1%) were well tolerated, and either strength could lead to clinical benefit in the treatment of FA.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Esclerose Tuberosa
/
Angiofibroma
Tipo de estudo:
Clinical_trials
/
Risk_factors_studies
Limite:
Humans
Idioma:
En
Revista:
Br J Dermatol
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
Nova Zelândia