Microneedle patch based on dissolving, detachable microneedle technology for improved skin quality of the periorbital region. Part 2: Clinical Evaluation.

Objective: Microneedle patches based on dissolving, detachable microneedle technology (Russian patent No. 2652567; US patent EFS No. 32735812; WO/2019/231360) are novel dermatological products that allow safe, painless and effective reduction of epidermal wrinkles after six procedures. The purpose of this study was two-fold (a) to assess the safety and efficacy of microneedle patches comprising 650 microneedles containing hyaluronic and ferulic acids after 6 procedures of applying the applicator to the skin for 25 min; and (b) to correlate our previously reported ex vivo findings.

Methods: The microneedle applicator contains 650 microneedles, which dissolve in 25 min of exposure. The effectiveness of microneedle applicators was confirmed by a randomized split-phase study involving 82 subjects. Applications of microneedle patches were performed at intervals of two times per week, and the effectiveness was assessed at 6 weeks after the start of the study.

Results: The results of the profilometric evaluation of skin smoothness demonstrated a significant reduction in the average roughness index by 65.32 ± 2.99% and in the mean skin waviness by 66.84 ± 1.6% compared with these indicators in the control group (P < 0.05). The therapeutic effect of the procedure was confirmed by an ultrasound examination that registered a 72.2 ± 5.4% and 25 ± 1.4% increase in echo-density of the epidermis and dermis, respectively. An independent blinded skin evaluation by dermatologists revealed steady decrease in puffiness of the application area in 89.9% of patients, increased elasticity in 78.3% of the patients, and reduced severity of epidermal wrinkles in 89.9% of the patients.

Conclusions: The applicator with 650 soluble microneedles on its surface containing hyaluronic and ferulic acids is considered a safe, effective and convenient way to improve the skin quality in the periorbital region after six procedures. Nevertheless, additional studies of soluble microneedles are required to fully assess the amount and distribution area of the injected hyaluronic acid and other active components, as well as to detail the mechanism of action of soluble microneedles to improve skin quality.