Results 171 to 180 of about 2,198 (218)
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Mechanism of melanophore dispersion
Biochemical Pharmacology, 1964Abstract The mechanism of the melanophore reaction of the skin of Hyla arborea (tree frog) has been studied. Apart from the specific hormones MSH and ACTH which elicit melanophore dispersion, the following substances produced darkening: theophylline and caffeine regularly, theobromine erratically, but not, however, dyphylline.
S, DIKSTEIN, F G, SULMAN
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Innervation of iridic melanophores
Zeitschrift f�r Zellforschung und Mikroskopische Anatomie, 1970The nerve supply to the iridic melanophores of the rat was studied with the electron microscope. The adrenergic and cholinergic terminals were identified with the aid of 5-hydroxydopamine, which produces dense-cored 400–800 A synaptic vesicles in adrenergic axon varicosities, whereas the synaptic vesicles of cholinergic axons remain empty. It was found
B, Ehinger, B, Falck
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Melanophore multinucleation pathways in zebrafish [PDF]
Development Growth and Differentiation, 2018 In zebrafish, apart from mononuclear melanophores, bi‐ and trinuclear melanophores are frequently observed; however, the manner in which multinucleation of these cells occurs during fish development remains unknown. Here, we analyzed the processes underlying multinucleation of zebrafish melanophores.
Shigeru Kondo, Masakatsu Watanabe
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Stimulation of melanophores and guanophores by melanophore-stimulating hormone peptides
General and Comparative Endocrinology, 1964Abstract Both melanophores and guanophores are under the control of hypophysial chromatotropic hormone (CTH, MSH, MDH, intermedin, etc.). This principle induces melanophore expansion and guanophore contraction. In order to compare the structural requirements of CTH for both melanophore and guanophore responses, the efficacy of various MSH peptides on
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The action of reserpine on teleost melanophores
European Journal of Pharmacology, 1973Abstract Reserpine caused darkening of both pencil fish and angelfish, this effect lasted for at least 10 and 25 days respectively. The aggregation of pigment granules within the melanophores evoked by stimulation of the nerves supplying the melanophores was inhibited by reserpine in both species.
B C, Finnin, B L, Reed
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Action of melanophore-stimulating hormone on melanophores of the cyprinid fish Zacco temmincki
Comparative Biochemistry and Physiology Part C: Comparative Pharmacology, 19821. Alpha MSH was extremely effective in inducing melanosome dispersion in both innervated and denervated melanophores in isolated scales of Zacco termmincki. 2. The sensitivity of the melanophores to MSH did not change after denervation. 3. The MSH action was blocked by mersalyl, a SH inhibitor, but not by any of alpha and beta adrenergic blockers.
T, Iga, I, Takabatake
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Ionic requirements for melanophore stimulating hormone (MSH) action on melanophores
Comparative Biochemistry and Physiology Part A: Physiology, 1979Abstract 1. 1. Calcium is required for melanophore stimulating hormone (MSH) action on melanophores of the lizard, Anolis carolinensis , the toad, Scaphiopus couchi , and the frog Rana berlandieri forrei . 2. 2. Ca 2+ is required for an initial mechanism of MSH action, but not for melanosome dispersion per se , since melanophores respond
Divid L Vesely, Mac E Hadley
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Modeling of pattern regulation in melanophores
Journal of Theoretical Biology, 2007Melanosomes, pigment granules in melanophores, play a principal role in physiological color adaptation of fish and frog. Melanophores regulate melanosome trafficking on cytoskeletal filaments to generate a range of spatiotemporal patterns. Here, we present the first comprehensive model of spatiotemporal evolution of melanosome patterns.
Dinh, Anh-Tuan +2 more
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Functional Screening in the Melanophore Bioassay
Current Protocols in Pharmacology, 2005AbstractThe melanophore bioassay is a robust, sensitive, and versatile procedure for screening G protein–coupled receptors in a variety of formats. Because melanophores contain a wide variety of G proteins, they can be employed as a sensitive, real‐time response system for studying transfected receptors and for defining equilibria for drug effects ...
Channa, Jayawickreme +5 more
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Melanophore differentiation in leaf frogs
Developmental Biology, 1978Abstract In melanosomes of Pachymedusa (Agalychnis) dacnicolor and other leaf frogs, the pteridine dimer, pterorhodin, is found in fibers concentric to a kernel of eumelanin. The kernel is a remnant mature larval melanosome that is renovated at metamorphic climax and on which pterorhodin is deposited at the completion of metamorphosis.
J T, Bagnara +3 more
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