Voltage Gated Sodium Channels
Mostrando 1-12 de 89 artigos, teses e dissertações.
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1. Spider venom peptides as potential drug candidates due to their anticancer and antinociceptive activities
Abstract Spider venoms are known to contain proteins and polypeptides that perform various functions including antimicrobial, neurotoxic, analgesic, cytotoxic, necrotic, and hemagglutinic activities. Currently, several classes of natural molecules from spider venoms are potential sources of chemotherapeutics against tumor cells. Some of the spider peptide to
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 03/06/2019
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2. Anticonvulsant mechanism of saponins fraction from adventitious roots of Ficus religiosa: possible modulation of GABAergic, calcium and sodium channel functions
ABSTRACT In our previous studies, quantified saponins-rich fraction from adventitious root extract of Ficus religiosa L., Moraceae, showed anticonvulsant effect in acute, as well as chronic mice models of epilepsy. The present study was designed to reveal putative anticonvulsant mechanism of quantified saponins-rich fraction using target specific animal mode
Rev. bras. farmacogn.. Publicado em: 2016-10
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3. β-Citronellol, an alcoholic monoterpene with inhibitory properties on the contractility of rat trachea
β-Citronellol is an alcoholic monoterpene found in essential oils such Cymbopogon citratus (a plant with antihypertensive properties). β-Citronellol can act against pathogenic microorganisms that affect airways and, in virtue of the popular use of β-citronellol-enriched essential oils in aromatherapy, we assessed its pharmacologic effects on the contracti
Braz J Med Biol Res. Publicado em: 04/12/2015
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4. Allosteric interactions between receptor site 3 and 4 of voltage-gated sodium channels: a novel perspective for the underlying mechanism of scorpion sting-induced pain
AbstractBackground BmK I, a site-3-specific modulator of voltage-gated sodium channels (VGSCs), causes pain and hyperalgesia in rats, while BmK IT2, a site-4-specific modulator of VGSCs, suppresses pain-related responses. A stronger pain-related effect has been previously attributed to Buthus martensi Karsch (BmK) venom, which points out the joint pharmacolo
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 10/11/2015
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5. Carvacrol reduces neuronal excitability by inhibiting the channels to voltage-dependent sodium / Carvacrol reduz a excitabilidade neuronal pela inibição dos canais para sódio dependente de voltagem
O monoterpeno carvacrol está presente em muitos óleos essenciais de plantas e tem atraído atenção devido à sua grande variedade de atividades biológicas benéficas, especialmente atividade analgésica e o bloqueio da excitabilidade neuronal, no entanto, seu mecanismo de ação permanece desconhecido. O presente estudo teve como objetivo explorar os me
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/03/2012
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6. Scorpions from the primeval subgenus Archaeotityus produce putative homologs of Tityus serrulatus toxins active on voltage-gated sodium channels
It has been proposed that the subgenus Archaeotityus comprises the most ancient species group within the medically important scorpion genus Tityus. cDNA encoding sodium-channel active toxins from the type species of this subgenus, Tityus clathratus (central Venezuela), have been isolated and sequenced. Two cDNAs were retrieved that encoded 61 amino acid-long
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 2012
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7. Modulação da atividade dos canais de sódio dependentes de voltagem e de canais TRPV1 por (-)-Carvona
Among the natural products with experimentally proven analgesic properties, the monoterpernes are of great importance, recognized as the main chemical constituents of essential oils from aromatic plants. ()-Carvone is an example of monoterpene with antinociceptive properties, founded as the main active constituent of oils from some species of the genus Menth
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/12/2011
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8. Adaptive evolution of the vertebrate skeletal muscle sodium channel
Tetrodotoxin (TTX) is a highly potent neurotoxin that blocks the action potential by selectively binding to voltage-gated sodium channels (Na v). The skeletal muscle Na v (Na v1.4) channels in most pufferfish species and certain North American garter snakes are resistant to TTX, whereas in most mammals they are TTX-sensitive. It still remains unclear as to w
Genetics and Molecular Biology. Publicado em: 2011
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9. Renal- and calcium-dependent vascular effects of Polybia paulista wasp venom
In the present study, the effects of Polybia paulista venom (PPV) on renal and vascular tissues were investigated. Isolated kidneys perfused with PPV (1 and 3 μg/mL) had increased perfusion pressure, renal vascular resistance, urinary flow, and glomerular filtration rate; and reduced sodium tubular transport. Histological evaluation demonstrated deposits of
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2011
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10. Analysis of the inhibitory effect of eugenol on voltage-gated Na+ channels of sensory neurons. / Análise do efeito inibitório do eugenol sobre canais para Na+ ativados por voltagem em neurônios sensitivos.
The previously described inhibitory effects of eugenol (EUG) on voltage-activated Na+ channels (Nav) are not compatible with our results. We have studied the effects of EUG on macroscopic Na+ currents and compared them to the effects of lidocaine, a local anesthetic. EUG blocked both mixed (TTX-S and TTX-R) and TTX-R Na+ currents in a fast and reversible man
Publicado em: 2010
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11. Determination of disulfide bridges of two spider toxins: hainantoxin-III and hainantoxin-IV
Peptide toxins are usually highly bridged proteins with multipairs of intrachain disulfide bonds. Analysis of disulfide connectivity is an important facet of protein structure determination. In this paper, we successfully assigned the disulfide linkage of two novel peptide toxins, called HNTX-III and HNTX-IV, isolated from the venom of Ornithoctonus hainana
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2009
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12. Mecanismo molecular de ação da Ts3 em canais de sódio dependentes de voltagem
Voltage-gated sodium channels are the molecular targets of several groups of toxins that bind to specific receptor sites and modify their function. The well-know a-scorpion toxins bind in a voltage-dependent way to site 3, which is partially formed by the extracellular loop connecting S3 and S4 segments of domain IV, slowing down fast inactivation. While the
Publicado em: 2006