Transformation of amphibian iridophores into melanophores in clonal culture

Ide, Hiroyuki; Hama, Tadao

doi:10.1016/0012-1606(76)90232-3

Cited by 33 publications

(15 citation statements)

References 16 publications

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“…5, 6). This lends credibility to the hypothesis of transdifferentiation of iridophores into melanophores (Ide and Hama, 1976;Ide, 1979Ide, , 1981Le Douarin, 1982;Bagnara, 1987). It is likely that between their two distinct homings, the upper dermis and the subcutaneous tissue, iridophores may transdifferentiate into melanophores under our culture conditions.…”

Section: Discussionmentioning

confidence: 53%

Localization of pigment cells in cultured frog skin

Lechaire¹

1990

Am. J. Anat.

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The pigmentation pattern of ventral skin of the frog Rana esculenta consists mainly of melanophores and iridophores, rather than the three pigment cells (xanthophores, iridophores, and melanophores) which form typical dermal chromatophore units in dorsal skin. The present study deals with the precise localization and identification of the types of pigment cells in relation to their position in the dermal tracts of uncultured or cultured frog skins. Iridophores were observed by dark-field microscopy; both melanophores and iridophores were observed by transmission electron microscopy. In uncultured skins, three levels were distinguished in the dermal tracts connecting the subcutaneous tissue to the upper dermis. Melanophores and iridophores were localized in the upper openings of the tracts directed towards the superficial dermis (level 1). The tracts themselves formed level 2 and contained melanophores and a few iridophores. The inner openings of the tracts made up level 3 in which mainly iridophores were present. These latter openings faced the subcutaneous tissue In cultured skins, such pigment-cell distribution remained unchanged, except at level 2 of the tracts, where pigment cells were statistically more numerous; among these, mosaic pigment cells were sometimes observed.

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Section: Discussionmentioning

confidence: 53%

Localization of pigment cells in cultured frog skin

Lechaire¹

1990

Am. J. Anat.

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“…From these observations, Bagnara (1972) concluded that 'all three pigmentary organelles, melanosomes, pterinosomes, and reflecting platelets may be derived from a common equipotential or pluripotential primordial organelle'. Indeed, transformation of iridophores (from tail skin of tadpoles) into melanophores in clonal culture was recently observed (Ide and Hama, 1976).…”

Section: Chemical Diversity Of Retina1 Tapeta and Chemicalmentioning

confidence: 99%

Fishes with Eye Shine: Functional Morphology of Guanine Type Tapetum Lucidum

Somiya¹

1980

Mar. Ecol. Prog. Ser.

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In several teleost fishes, guanine type ocular tapeta lucida were studied by conventional light and fluorescence microscopy. Retina1 tapeta lucida were found in the eyes of Chlorophthalmus albatrossis, Chlorophthalmus nigromarginatus, Chlorophthalmus acutifrons, Beryx splendens, Beryx decadactylus, Polymixia japonica and Polymixia bemdti. Choroidal tapeta exist in the eyes of Neoscopelus microchir, Diaphus coeruleus, Diaph us sagarniensis, Epigon us atherinoides, Priacanthus macracanthus, Priacanthus harnrur, Priacanthus boops and Pn'stigenys niphonia. Spectrophotometric and paper-chromatographic evidence reveals the tapetal material to be mainly guanine. Grouped receptors in the retinas of Chlorophthalmus and Polymixia and argentea in the eyes of Priacanthus are described and a classification of the tapeta lucida in teleosts is given. The relationship between retinal and choroidal tapeta is discussed and a possible explanation offered for the two types of tapetal organization in teleosts. Apparently, the two types are related to the ecology and behavior of the species concerned.

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“…The presence in vivo of both hybrid chromatophores or "mosaic pigment cells" and "mosaic organelles" has been confirmed, e.g., by Arnott et al (1970), Schliwa and Euteneuer (1979), and lkylor (1971). Moreover, in vitro studies performed by Ide (1978) and Ide and Hama (1976) demonstrated the interconversion of pigment cells: amphibian xanthophores and iridophores were found to be transformed into melanophores in clonal culture.…”

Section: Discussionmentioning

confidence: 99%

Pigmentary System of the Adult Alpine Salamander Salamandra atra aurorae (Trevisan, 1982)

Pederzoli

Trevisan

1990

Pigment Cell Research

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The pigmentary system of skin from adult specimens of the amphibian urodele Salamandra atra aurorae was investigated by light microscope, electron microscope, and biochemical studies. Yellow (dorsum and head) and black (flank and belly) skin was tested. Three chromatophore types are present in yellow skin: xanthophores, iridophores, and melanophores. Xanthophores are located in the epidermis whereas iridophores and melanophores are found in the dermis. Xanthophores contain types I, II, and III pterinosomes. Some pterinosomes are very electron-dense. Black skin has a single type of chromatophore: the melanophores. Some melanophores are located in the epidermis. In contrast to the dermal melanophores, these present, in addition to typical melanosomes, organelles with different morphology and vesicles having a limiting membrane and containing little amorphous material. Both skin types present some pteridines and flavins, though they are qualitatively and quantitatively more abundant in yellow skin extracts.

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Transformation of amphibian iridophores into melanophores in clonal culture

Cited by 33 publications

References 16 publications

Localization of pigment cells in cultured frog skin

Localization of pigment cells in cultured frog skin

Fishes with Eye Shine: Functional Morphology of Guanine Type Tapetum Lucidum

Pigmentary System of the Adult Alpine Salamander Salamandra atra aurorae (Trevisan, 1982)

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