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  • noun

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a cell in the basal layer of the epidermis that produces melanin under the control of the melanocyte-stimulating hormone

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Dominant white (I) pigs lack mature melanocytes in the skin as well as lacking precursor melanocytes as would be anticipated for a KIT mutation (Johansson-Moller et al.
The pigment genes can also affect melanocytes in the iris, resulting in blue eyes in the absence of the normal pigment particles," Dr.
In the papillary and upper reticular dermis, dendritic melanocytes are present and surrounded by fibrous sheaths (which are not present in other dermal melanocytosis, such as blue nevus or mongolian spots).
At the end of each hair cycle, some melanocytes become damaged and die.
Contrastingly, redheads are born with a genetic variant that causes MC1R to chemically function differently on melanocytes, which leads to less eumelanin and more pheomelanin production.
Changes in melanin and melanocytes in mottled hypopigmentation after low-fluence 1,064-nm Q-switched Nd:YAG laser treatment for melasma.
With chronic sun exposure, however, melanocytes become hyperactive and release too much melanin that manifests as unsightly age spots and dark patches on the skin.
Gas is involved in the melanocortin signaling pathway and produces eumelanin in melanocytes (Van Raamsdonk et al.
The primary functions of melanocytes of pigmentation and UV protection in the skin and eye are unambiguous and evident, but their presence in noncutaneous areas is not well understood.
In the latest study, the researchers found that blocking Wnt signaling stalled stem cell growth and the maturing of stem cells into normally functioning melanocytes, even when endothelin proteins were present.
Vitiligo is a patchy loss of skin pigmentation caused by destruction of the pigment- producing cells called melanocytes," said Dr Mohanty.
Ito and her team found that when they blocked Wnt signalling it stalled the growth of the stem cells and stopped them from maturing into normally functioning melanocytes, even when endothelin proteins were present.
Melanoma cells often express developmental genes, display multi-differentiation potential, and seem to recapitulate the migratory nature of neural crest stem cells from which melanocytes arise.
The procedure involves use of a Q-switched frequency-doubled Nd:YAG laser that targets melanocytes in the trabecular meshwork of the eye, thus reducing intraocular pressure (IOP).
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