Development of personalized skin treatment in medicine and skin care may benefit from simple and accurate evaluation of the fraction of senescent skin fibroblasts that lost their proliferative capacity. We examined whether enriched analysis of colonies formed by primary human skin fibroblasts, a simple and widely available cellular assay, could reveal correlations with the fraction of senescent cells in heterogenic cell population. 
Autologous dermal fibroblasts for the correction of age-related skin changes (SPRS-therapy®). Results of 2-year clinical trials and post-marketing clinical studies
Basic molecular mechanisms, associated with the main cell population of the dermis – fibroblasts – are the basis of skin aging. The number of functionally active fibroblasts in the skin and their biosynthetic activity decreases with age, thus enhancement of their cell density with synthetically active cells is accepted as a one of the most effective methods.