Gold Skin Care Center, Tennessee Clinical Research Center, Nashville 37215, USA.
Growth factors, in addition to their crucial role in cutaneous wound healing, are also beneficial for skin rejuvenation. Due to their multifunctional activities such as promoting skin cell proliferation and stimulating collagen formation, growth factors may participate in skin rejuvenation at various levels. The present placebo-controlled study aimed to further investigate the anti aging effects of a novel skin cream containing a mixture of human growth factors and cytokines, which was obtained through a biotechnology process using cultured human fetal fibroblasts. Aside from clinical assessment of skin wrinkles, the skin surface topography was analyzed by 3D in vivo optical skin imaging using the Phaseshift Rapid in vivo Measurement of Skin (PRIMOS) device. This device allows fast, contact-free, and direct measurement of the skin surface topography in vivo at high resolution. This technique is quantitative and more reliable than a visual assessment of wrinkles using a scoring system, which is subjective and strongly dependent on investigator and assessment conditions. Using the PRIMOS device, which is also regarded as a more accurate method than the commonly used silicon replica technique, skin surface roughness was shown to significantly decrease between 10% and 18% depending on the roughness parameter after 2 months of twice-daily application of the human growth factor and cytokine cream. This was compared to treatment with the placebo formulation resulting in an approximate 10% decrease of 2 roughness parameters, whereas the remaining parameters remained unchanged. We found that topical application of growth factors and cytokines are beneficial in reducing signs of skin aging.
J Drugs Dermatol. 2009 May;8(5 Suppl Skin Rejuenation):4-13.