Ultrastructure and Physiological Response of Leucophores of the Medaka Oryzias latipes : Physiology

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概要

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• Ultrastructure and physiological responses of leucophores in isolated scales of the medaka Oryzias latipes were studied. Many of the leucophores are in close association with overlying melanophores, and nerve fibers that run between the two cells frequently form synapses on both sides. This situation provides a very efficient way to conduct body lightening response, since the stimulation of single adrenergic fiber produces pigment aggregation in the melanophore and dispersion in the leucophore almost simultaneously. Although it appears to be rather infrequent, some nerve fibers enter into the cell body of leucophores. Spherical and tubular synaptic vesicles, and larger vesicles with an electron-dense central core are observed in single nerve fibers. Responses of leucophores are produced by selective migration of the pigment granules toward or away from the center of the cell. Numerous microtubules and 10nm filaments run parallel to the long axis of the dendrites, though direct connection between these cytoskeletal elements and pigment granules has not been ascertained by electronmicroscopy. Pigment dispersion and aggregation proceed normally in the presence of cytochalasin B while colchicine and EHNA (erythro-9-3-(2-hydroxynonyl)adenine) potently inhibit pigment aggregation. NEM (N-ethylmaleimide) interferes with the pigment dispersion elicited by epinephrine. These results suggest that the intracellular movements of pigment granules in leucophores are microtubule-dependent.

• 社団法人日本動物学会の論文
• 1988-04-15

著者

• OBIKA Masataka

  Department of Biology, Keio University

• Obika M

  Department Of Biology Keio University

• Obika Masataka

  Department Of Biology Keio University

関連論文

• The Inhibition of Motility of Demembranated Spermatozoa by Anti-tubulin Antibodies
• Ultrastructure and Physiological Response of Leucophores of the Medaka Oryzias latipes : Physiology
• A New Species of the Genus Pidonia (Coleoptera,Cerambycidae) from Japan
• A New Species of the Genus Molorchus (Coleoptera,Cerambycidae) from Central Japan
• Pigment Migration in Isolated Fish Melanophores
• The Effects of Dynein ATPase Inhibitors on Melanosome Translocation within Melanophores of the Medaka, Oryzias latipes(Cell Biology)
• Subcellular Localization of Calcium in Teleost Melanophores
• Morphology of chromatophores of the medaka(Development of Medaka Biology in Japan-Part I)

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