Journal ArticleDOI
Additional evidence for norepinephrine as a neurotransmitter triggering release of melanin-dispersing hormone in the fiddler crab, Uca pugilator: The effects of α1 and β adrenoceptor blocking drugs on melanin migration
TLDR
The results are consistent with the hypotheses that norepinephrine produces melanin dispersion in Uca pugilator by triggering release of melanin-dispersing hormone (MDH) and when fiddler crabs are transferred from a white to a black background α1 adrenoceptor activation plays the dominant role in executing the MDH-release triggering action of norpineprhine.About:
This article is published in Comparative Biochemistry and Physiology Part C: Comparative Pharmacology.The article was published on 1982-01-01. It has received 5 citations till now. The article focuses on the topics: Uca pugilator & Fiddler crab.read more
Citations
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Journal ArticleDOI
Pharmacological evidence that alpha1.-adrenoceptors mediate metamorphosis of the pacific oyster, Crassostrea gigas
S.L. Coon,D.B. Bonar +1 more
TL;DR: Oyster larvae can be induced to metamorphose by exposure to the natural vertebrate adrenergic agonists, epinephrine and norepinephrine, and receptors similar to vertebrate-type alpha1-adrenoceptors mediate oyster metamorphosis are demonstrated, the first evidence for alpharadrenOceptors in molluscs.
Journal ArticleDOI
Control of the release of crustacean hormones by neuroregulators
TL;DR: The potential use of the crustacean neuroendocrine system as a model for testing novel neuropharmacological compounds is outlined, including that derived from biochemical and immunocytochemical investigations.
Journal ArticleDOI
Distal retinal pigment of the fiddler crab, Uca pugilator: Evidence for stimulation of release of light adapting and dark adapting hormones by neurotransmitters
TL;DR: In intact fiddler crabs, Uca pugilator, norepinephrine (NE) produced light adaptation of the distal retinal pigment whereas dopamine (DA) produced dark adaptation of this pigment.
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Further evidence for norepinephrine as a neurotransmitter stimulating release of melanin-dispersing hormone in the fiddler crab, Uca pugilator: the changes in the melanophores of the crabs following reserpine, 6-hydroxydopamine and bretylium administration.
TL;DR: The most striking effect of these drugs was that they strongly reduced the amount of melanin dispersion that normally results on transferring the crabs from a white to a black background.
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Effects of monoamines and monoaminergic agents on migration of the red pigment in chromatophores of the shrimp, Macrobrachium ohione
TL;DR: The data obtained using drugs known to act selectively in mammals via 5-hydroxytryptaminergic and dopaminergic mechanisms on the translocation of the red pigment from the chromatophores both in vitro and in vitro lead to the hypothesis that 5-HT and DA serve as neurotransmitters triggering release of red pigment-dispersing hormone and red pigment -concentrating hormone, respectively, in the shrimp, Macrobrachium ohione.
References
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A functional basis for classification of alpha-adrenergic receptors.
TL;DR: A division of adrenergic receptors into alpha and beta types could conceivably lead to the development of powerful agents even more selective for inhibition of renin release, control of blood pressure by a central site of action, reduction of fever, and possible other scientific or therapeutic applications.
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The Pigmentary Effector System. VI. The Dual Character of Endocrine Co-Ordination in Amphibian Colour Change
Lancelot Hogben,David Slome +1 more
TL;DR: It is now clearly established that the pituitary gland is an essential agency in determining Amphibian colour change, and it is still possible to entertain the hypothesis that the gland is merely a condition of the response of the melanophores to nervous impulse in efferent fibres supplying the skin.
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Membrane receptors for hormones and neurotransmitters.
TL;DR: Investigation of the hormone- receptor interaction will no doubt yield new insights into both the mechanism of hormone action and membrane structure and function.
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SELECTIVITY OF BLOCKING AGENTS FOR PRE- AND POSTSYNAPTIC α-ADRENOCEPTORS
TL;DR: The results indicate that yohimbine and phentolamine are more potent in blocking presynaptic than postsynaptic α‐adrenoceptors, and Phenoxybenzamine and prazosin block post synapse‐specific α‐ADrenoceptor preferentially.
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On the Excitation of Crustacean Muscle. I
TL;DR: Experiments show that on suddenly releasing the tension of the muscle during a tetanus, the tension always redevelops in a manner similar to the development of tension in the quick contraction, even though the tetanus be developed initially by the slow contraction.