Biological Stability of Plasma Rich in Growth Factors-Derived Autologous Topical Serum After Three-Months Storage.

In this study, the stability of a novel autologous topical serum (ATS) derived from plasma rich in growth factors technology (PRGF) has been evaluated. As skin ages, mechanical, protective and restorative properties decrease leading to multiple clinical conditions. In recent years, topical administration of growth factors has emerged as a promising therapeutic alternative to promote wound healing and skin regeneration. Determination of stability is a crucial step in the formulation process in order to develop an effective product. Blood from 8 healthy donors was harvested and the autologous topical serum was obtained. Resulting ATS samples were either kept fresh or stored for 1, 2, and 3 months at 4ºC. Physical properties and growth factor content were determined in ATS samples at each time of storage. The effect on human dermal fibroblast proliferation and the sterility of the samples was also studied. All the analyzed parameters remained stable along the storage time while pH values increased slightly with respect to fresh samples. No microbial contamination was detected in any of the samples. Preservation of the autologous topical serum up to 3 months under refrigeration does not affect either its physical or mechanical properties or neither alters the growth factors´ composition, thus preserving its biological potential. This achievement enables patients with chronic disorders to maintain their treatment with a lower frequency of blood extractions without affecting the efficacy of PRGF therapy. J Drugs Dermatol. 2018;17(10):1115-1121.