Cytoskeletal architecture of dermal chromatophores of the freshwater teleost Oryzias latipes.

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Abstract

Cytoskeletal construction of dermal chromatophores of Oryzias latipes was studied by immunofluorescence microscopy. A microtubule system was most prominent in melanophores where a large number of microtubules emanated from the center of the cell. Xanthophores had an arrangement basically similar to that of melanophores, though the radial pattern became more irregular in the peripheral region where intersecting wavy microtubules were quite frequent. Oval-shaped leucophores exhibited the least-developed microtubule system, where the limited number of microtubules formed a loose basket-like architecture. Intermediate filaments were ubiquitously present in all types of chromatophores and were found to be vimentin-immunoreactive. Examination of doubly-labeled cells indicated that vimentin filaments had similar distribution patterns with microtubules. Orderly arranged bundles of actin filaments were found only in xanthophores, while in melanophores and xanthophores, actin expression was diffuse without displaying a conspicuous filamentous organization. Colchicine treatment induced depolymerization of microtubules and retraction of dendrites in varying degrees in cells in culture and in situ. Melanophores in culture are very sensitive to the treatment while xanthophores appeared to be more resistant in respect to the maintenance of cell morphology.

Original languageEnglish
Pages (from-to)417-422
Number of pages6
JournalPigment cell research / sponsored by the European Society for Pigment Cell Research and the International Pigment Cell Society
Volume6
Issue number6
Publication statusPublished - 1993 Dec

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ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science
  • Cell Biology
  • Clinical Biochemistry
  • Developmental Biology

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