Melanophores


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Related to Melanophores: Iridophores, Xanthophores

Melanophores

 

in cold-blooded vertebrates, pigment cells containing melanin granules; the last stage in the differentiation of melanocytes.

Melanophores are large dendritic cells that respond to changes in light or to the pituitary melanocyte-stimulating hormone by changing color. This change reflects the alteration of the dispersion of the pigment granules in the cytoplasm. Melanophores cannot divide, migrate, or synthesize tyrosinase, the specific enzyme necessary for melanin synthesis. Together with other chrotnatophores, they make up part of a system responsible for rapid changes in skin color in a number of animals, including many fishes, amphibians, and chameleons.

REFERENCE

Fitzpatrick, T. B. “Terminology of Vertebrate Melanin-containing Cells.” Science, 1965, vol. 152, pp. 88–89.
References in periodicals archive ?
All specimens were relatively robust; in specimens [greater than or equal to] 6 mm long, there were large parietal and preopercular spines and melanophores on the lower jaw, on the margins of the pectoral fins, and on the ventral margin of the tail but they were absent on the upper jaw and snout and dorsally and laterally on the trunk and tail.
The recombinant protein produced was quantified using a BCA protein assay kit (Pierce, Rockford, IL) and tested for bioactivity by using a pigment aggregation assay in tilapia melanophores.
Each embryo had a clear chorion and a lightly tinted yellow to nearly clear yolk sac with a moderate amount of melanophores present.
Yellow pigment cells called xanthophores reach out toward black pigment cells called melanophores.
jabonero), in having melanophores present on the posterior margins of the scales all along the sides of body (vs.
These clinical cases were tentatively diagnosed as leukoderma and confirmed on basis of hypocupremia, low serum ceruloplasmin and absence of melanocytes and melanophores in epidermis on histopathological examination.
The colors of melanophores, erythrophores, xanthophores, and cyano-phores are generated by light absorbance on biogenic pigmentary substances that are contained in organelles (chromatosomes).
Using high-resolution bright-field and fluorescence imaging, the researchers were able to observe the development of various organs such as the eyes, ears, melanophores, brain, yolk sac, trunk and chorion (see Video 1), as well as heartbeats (see Video 2) in the zebrafish embryos.
A common serosa that possesses abundant melanophores surrounds the Wolffian ducts and the rest of the urogenital organs.
5-1V; (15) third toe with lateral fringes; (16) discs on toes slightly larger than those on fingers; (17) pale dorsolateral stripe present; (18) inguinal stripe absent; (19) ventrolateral stripe absent; (20) collar absent; (21) heart-shape pattern of melanophores on throat; (22) venter yellowish or pale-cream with copper markings; (23) moderate-sized teeth, robust, slightly curved posteriad; (24) medial lingual process absent; (25) pad absent on distal portion of forearms in males; (26) testes cream.