June 2026 in “Journal of Cosmetic Dermatology” This study reported that microneedle-assisted delivery of PEGylated recombinant human fusion collagen significantly improved hair regrowth and density in an androgenetic alopecia mouse model and in a small clinical trial with AGA patients, suggesting potential efficacy and safety for this treatment approach.
March 2024 in “Journal of pharmacy & pharmaceutical sciences” This review discusses the design strategies and applications of long-acting polymeric microneedles, noting their potential to improve patient compliance and reduce side effects in chronic disease management, but reports no new experimental results.
June 2026 in “ACS Nano Medicine” This study designed fibronectin nanogel microneedles, reporting their potential to enhance tissue repair by improving collagen organization, reducing inflammation, and promoting angiogenesis in both photoaged and diabetic wound models.
April 2026 in “Journal of Nanobiotechnology” In this study, researchers developed a leech-inspired microneedle platform for targeted delivery of metformin to hair follicle cells, which showed promising results in reducing inflammation and oxidative stress and promoting hair growth, offering a potential new treatment strategy for androgenetic alopecia.
February 2026 in “Archives of Dermatological Research” In this study, microneedle-assisted delivery of polyglutamate significantly improved hair parameters, scalp symptoms, and quality of life in androgenetic alopecia patients, with no serious adverse reactions reported.