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The Regulation of Skin Pigmentation*

Y. Yamaguchi,Michaela Brenner,V. Hearing

Published 2007 in Journal of Biological Chemistry

ABSTRACT

Visible pigmentation of the skin, hair, and eyes depends primarily on the functions of melanocytes, a very minor population of cells that specialize in the synthesis and distribution of the pigmented biopolymer melanin. Melanocytes are derived from precursor cells (called melanoblasts) during embryological development, and melanoblasts destined for the skin originate from the neural crest. The accurate migration, distribution, and functioning of melanoblasts/melanocytes determine the visible phenotype of organisms ranging from simple fungi to the most complex animal species. In human skin, melanocytes are localized at the dermal/epidermal border in a characteristic regularly dispersed pattern. Each melanocyte at the basal layer of the epidermis is functionally connected to underlying fibroblasts in the dermis and to keratinocytes in the overlying epidermis. Those three types of cells are highly interactive and communicate with each other via secreted factors and their receptors and via cell/cell contacts to regulate the function and phenotype of the skin.

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