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Facial epidermal pigmentation and skin tumors can be caused by UV exposure and other physical and chemical irritations. In this report we describe the primary culture of melanocytes from human face skin. The ability to culture these melanocytes will enable their morphological and biological properties to be investigated. Skin specimens were obtained from patients who had undergone lower blepharoplasty procedures. Digestion with neutral protease and trypsin was used to obtain single cell suspensions of epidermal cells. The cells were cultured in M254 medium supplemented with human melanocyte growth solution. Cell morphology was observed using inverted microscopy. Melanocytes were positively identified using both L-DOPA staining and S-100 protein immunohistochemical staining. Immunofluorescence was used to confirm the expression of tyrosinase-related protein-1, a melanocyte-specific protein. The cellular ultrastructure of the melanocytes was observed by transmission electron microscopy. The cultured human melanocytes from face skin were multi-dendritic, and many mature melanosomes were observed. Therefore, using a specific culture medium, melanocytes from face skin can be successfully cultured and made available for further investigations.

Primary culture of human face skin melanocytes for the study of hyperpigmentation