Results 171 to 180 of about 7,818 (207)

Innervation of iridic melanophores

Zeitschrift f�r Zellforschung und Mikroskopische Anatomie, 1970
The 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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Ionic requirements for melanophore stimulating hormone (MSH) action on melanophores

Comparative Biochemistry and Physiology Part A: Physiology, 1979
Abstract 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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Pharmacological studies on teleost melanophores

European Journal of Pharmacology, 1969
Abstract Thirty-three drugs have been administered to the pencil fish ( Nannostomus beckfordi anomalus ) to determine the nature of the innervation of the melanophores. The pencil fish showed pigment aggregation (paling) to all sympathomimetic drugs tested and pigment dispersal (darkening) when sympathetic transmission was blocked at any level.
N E, Ruffin, B L, Reed, B C, Finnin
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Stimulation of melanophores and guanophores by melanophore-stimulating hormone peptides

General and Comparative Endocrinology, 1964
Abstract 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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Melanophore differentiation in leaf frogs

Developmental Biology, 1978
Abstract 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, W, Ferris, W A, Turner, J D, Taylor   +3 more
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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, 1982
1. 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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Melatonin‐induced desensitization in amphibian melanophores

Journal of Experimental Zoology, 1993
AbstractVideo‐microscopic examination of pigment granule translocation in cultured amphibian melanophores provides continuous, real‐time observation of cellular responses to hormonal and pharmacologic agents and is particularly useful for studying the mechanisms underlying melatonin‐induced pigment aggregation.
M D, Rollag, G R, Lynch
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Fine structure of tadpole melanophores

The Anatomical Record, 1966
AbstractThe fine structure of frog tadpole melanophores has been found to be different from that of teleost chromatophores (Falk and Rhodin, '57). The cytoplasm is not divided into inner and outer regions. Organelles are distributed throughout the cytoplasm. A special search for microtubules was made and only a single such structure could be found.
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Functional Screening in the Melanophore Bioassay

Current Protocols in Pharmacology, 2005
AbstractThe 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, Howard, Sauls, Chris, Watson, David, Moncol, Thomas, Rimele, Terry, Kenakin   +5 more
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Melanophore activity of urodele melanocytes

Canadian Journal of Zoology, 1971
Melanophore activity of dermal and epidermal melanocytes in Taricha torosa and Ambystoma gracile has been observed with tricaine methanesulfonate (MS222) dissolved in habitat water, as well as with injected intermedin or injected epinephrine.
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