TY - CHAP M1 - Book, Section TI - Pigmentation and Melanocyte Biology A1 - Ostrowski, Stephen M. A1 - Fisher, David E. A2 - Kang, Sewon A2 - Amagai, Masayuki A2 - Bruckner, Anna L. A2 - Enk, Alexander H. A2 - Margolis, David J. A2 - McMichael, Amy J. A2 - Orringer, Jeffrey S. PY - 2019 T2 - Fitzpatrick's Dermatology, 9e AB - AT-A-GLANCEDevelopment of MelanocytesMelanocytes are derived from neural crest lineageTranscription factors (MITF, SOX10, PAX3) and signaling pathways (KIT, EDNRB) that are important for development, migration, and survival of melanocytes also play key roles in melanomaFunction of melanocytesKey function of melanocytes is to synthesize melanin and transfer to surrounding keratinocytesMelanocytes can produce brown/black melanin (eumelanin) or orange/yellow melanin (pheomelanin)The melanosome, a specialized lysosome-related organelle, is the site of melanin synthesis and storageRegulation of human pigmentationCommon human variants in melanocortin 1 receptor (MC1R) lead to the “red hair phenotype”—red hair, fair skin, inability to tan, and increased melanoma riskMC1R signals to the MITF transcription factor to regulate pigmentation and sun-tanning SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/18 UR - dermatology.mhmedical.com/content.aspx?aid=1161322062 ER -