Extracellular Vesicles for Cosmetic Applications

Extracellular vesicles (EVs) are nanosized membrane vesicles that carry membrane and cargo molecules inherited from their parental cells. Excellent delivery capacity, biological origin, and nanosized dimensions support the great potential of EVs as medical and cosmetic active ingredients. Many studies have already reported improved skin conditions by using EVs for skin rejuvenation, scar removal, and anti-pigmentation treatments. In this review, EVs from mesenchymal stem cells, platelets, skin microbiota, and microalgae will be considered. The most promising results come from mesenchymal stem cell (MSC) derived EVs that have impressive antiaging and wound-healing effects on the skin, but their use for medical or cosmetic purposes is not yet allowed in Europe and the United States. Autologous platelet- and extracellular vesicle-rich plasma (PVRP) is well tolerated and capable of rejuvenating the face; intradermal injections and topical applications are currently being considered in clinical and cosmetic dermatology. Symbiotic microorganisms of the human skin have many beneficial effects on the skin, but the presence of bacteria in cosmetic products is restricted; therefore, the preparation of EVs from skin-beneficial microbes is particularly relevant, and there are already many cosmetic products containing lysates from different probiotics on the market. Microalgae can produce many valuable bioactive compounds, antioxidants such as carotenoids are particularly interesting; therefore, microalgae are promising producers of EVs that could be used in cosmetic products. Keywords: Extracellular vesicles; Skin health; Microbiota; Mesenchymal stem cells; Micro-algae