Octopamine
Mostrando 1-12 de 40 artigos, teses e dissertações.
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1. The search for novel insecticide targets in the post-genomics era, with a specific focus on G-protein coupled receptors
Insects are considered pests globally, implicated in the destruction of agricultural fields and transmission of pathogens that cause deadly human diseases, such as dengue, Zika and malaria. The diversity of the insecticide arsenal has remained stagnant for decades, but the recent rise of insecticide resistance fueled the discovery of novel modes of action, a
Mem. Inst. Oswaldo Cruz. Publicado em: 2017-01
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2. Termorregulação colonial e energética individual em abelhas sem ferrão Melipona quadrifasciata Lepeletier (Hymenoptera, Apidae, Meliponini) / Colonial thermoregulation and energetics in stingless bees Melipona quadrifasciata Lepeletier (Hymenoptera, Apidae, Meliponini).
In eusocial insects, such as stingless bees, the control of nest conditions and maintenance of the colonial microclimate are important to brood incubation, development of eggs, larvae and pupae, and survival of the colony. One of the main thermoregulatory mechanisms to control nest temperature is the microhabitat selection to build the nest, such as tree hol
Publicado em: 2008
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3. Characterization of octopamine-sensitive adenylate cyclase: elucidation of a class of potent and selective octopamine-2 receptor agonists with toxic effects in insects.
Octopamine-2 receptors, associated with activation of adenylate cyclase, mediate a number of the important hormonal and neurotransmitter functions of octopamine in invertebrates. By utilizing the highly enriched octopamine-sensitive adenylate cyclase present in the firefly light organ, it has been possible to pharmacologically characterize octopamine-2 recep
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4. Multiple receptor types for octopamine in the locust.
1. Three different pharmacological classes of octopamine receptor mediate the actions of octopamine on the locust extensor-tibiae neuromuscular preparation. A receptor classification scheme is proposed based on the results of detailed studies with agonists and antagonists. 2. Octopamine1 class receptors mediate the slowing of a myogenic rhythm found in a spe
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5. Octopaminergic agonists for the cockroach neuronal octopamine receptor
The compounds 1-(2,6-diethylphenyl)imidazolidine-2-thione and 2-(2,6-diethylphenyl)imidazolidine showed the almost same activity as octopamine in stimulating adenylate cyclase of cockroach thoracic nervous system among 70 octopamine agonists, suggesting that only these compounds are full octopamine agonists and other compounds are partial octopamine agonists
University of Arizona Library.
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6. A modulatory octopaminergic neurone increases cyclic nucleotide levels in locust skeletal muscle.
Octopamine increases the level of cyclic AMP in a dose-dependent way in the locust extensor tibiae neuromuscular preparation. The response peaks after a 10 min exposure and then declines to a plateau. The effect of octopamine is potentiated in the presence of the phosphodiesterase inhibitor 3-isobutyl-1-methylxanthine (IBMX). The levels of cyclic GMP in the
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7. The role of cyclic nucleotides and calcium in the mediation of the modulatory effects of octopamine on locust skeletal muscle.
The role of cyclic AMP and calcium in the mediation of the effects of octopamine has been investigated in the extensor tibiae muscle of the hind leg of the locust. Elevation of cyclic AMP levels in the preparation by means of the phosphodiesterase inhibitor, 3-isobutyl-1-methylxanthine (IBMX), by means of the diterpene adenylate cyclase activator, forskolin,
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8. Dopamine counteracts octopamine signalling in a neural circuit mediating food response in C. elegans
Animals assess food availability in their environment by sensory perception and respond to the absence of food by changing hormone and neurotransmitter signals. However, it is largely unknown how the absence of food is perceived at the level of functional neurocircuitry. In Caenorhabditis elegans, octopamine is released from the RIC neurons in the absence of
Nature Publishing Group.
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9. Octopamine- and Serotonin-Stimulated Phosphorylation of Specific Protein in the Abdominal Ganglion of Aplysia california
Phosphorylation of a protein (or proteins) of molecular weight 120,000 in the Aplysia abdominal ganglion, as measured by incorporation of [32P] or [33P]sodium phosphate in vitro followed by separation of the phosphoproteins on sodium dodecyl sulfate-polyacrylamide gels, was specifically stimulated by incubation in the presence of the putative neurotransmitte
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10. Agonist-specific coupling of a cloned Drosophila octopamine/tyramine receptor to multiple second messenger systems.
A cloned seven transmembrane-spanning Drosophila octopamine/tyramine receptor, permanently expressed in a Chinese hamster ovary cell line, both inhibits adenylate cyclase activity and leads to the elevation of intracellular Ca2+ levels by separate G-protein-coupled pathways. Agonists of this receptor (octopamine and tyramine), differing by only a single hydr
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11. Regional differences in responsiveness to octopamine within a locust skeletal muscle.
Regional differences in the physiological and biochemical responses to octopamine have been investigated in the extensor tibiae muscle of the hind leg of the locust. Octopamine increases the rate of relaxation of twitch tension generated by the slow motoneurone by different amounts in different regions of the muscle. It also increases the amplitude of twitch
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12. Initial catabolism of aromatic biogenic amines by Pseudomonas aeruginosa PAO: pathway description, mapping of mutations, and cloning of essential genes.
Pseudomonas aeruginosa PAO1 was able to utilize several aromatic biogenic amines as sole sources of carbon or nitrogen. These included the phenethylamines tyramine and dopamine and the phenethanolamines octopamine, synephrine, and norepinephrine. Initial catabolism of the phenethylamines was mediated by a membrane-bound tyramine dehydrogenase which produced