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Melanophores inside frogs

100%

Pshennikova E. S., Voronina A. S.

International Letters of Natural Sciences

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2018

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tom 71

Melanocytes/melanophores were known for some decades as pigment cells in skin. The origin of these cells in embryogenesis from neural crest cells is actively investigated now. Some melanocytes/melanophores were described inside adult vertebrates. Historically, these internal melanocytes have been largely ignored, until recently. In frogs, the melanophores populate not only the skin, but all the inner connective tissues: epineurium, peritoneum, mesentery, outer vascular layer and skin underside. In adult avian, melanocytes were also found in visceral connective tissues, periostea, muscles, ovaries and the peritoneum. In mammals and humans, melanocytes are also revealed in eyes, ears, heart and brain. A black-brownish pigment, which can be found in brains of humans and some mammals, was called neuromelanin. Currently, attempts are being made to treat neurodegenerative diseases and various nerve injuries with medications containing melanin. In this micro-review, we wanted to remind again about the inner melanophores on visceral organs and lining blood vessels and nerves, their importance in organisms resistance to adverse environmental factors.

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Morphological differences in the skin of marble trout Salmo marmoratus and of brown trout Salmo trutta

67%

Sivka U., Halacka K., Bajec S. S.

Folia Histochemica et Cytobiologica

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2012

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tom 50

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nr 2

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Morphological analysis of chromatophores in the skin of trout

67%

Kaleta K.

Bulletin of the Veterinary Institute in Puławy

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2009

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tom 53

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nr 1

117-121

The aim of the study was the morphological analysis of chromatophore cells in the skin of trout. Based on the material representing three species (brown trout, rainbow trout, and char), the histological examination of 60 specimens of the skin from dorsal, lateral, and ventral sides of the body was carried out. Histological analysis of the trout's dermis revealed the variability of chromatophores regarding their morphology, distribution in the skin, and physiological state. There were distinguished melanophores in the pigment aggregation state or pigment dispersion state. There were found two types of iridophores, containing light-reflecting platelets in the cytoplasm. Histological study demonstrated the changes in the trout's dermis connected with appearance of nuptial coat during the spawning season.

Ograniczanie wyników

1 Bulletin of the Veterinary Institute in Puławy

1 Folia Histochemica et Cytobiologica

1 International Letters of Natural Sciences

1 Bajec S. S.

1 Halacka K.

1 Kaleta K.

1 Pshennikova E. S.

1 Sivka U.

1 Voronina A. S.

1 2018

1 2012

1 2009

Melanophores inside frogs

Morphological differences in the skin of marble trout Salmo marmoratus and of brown trout Salmo trutta

Morphological analysis of chromatophores in the skin of trout