Mesenteric Rings
Mostrando 13-24 de 28 artigos, teses e dissertações.
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13. Participação da via do óxido nítrico na resposta relaxante induzida por E- cinamaldeído-oxima em artéria mesentérica superior isolada de rato. / Participation of nitric oxide pathway in relaxation response induced by E- cynnamaldheyde-oxime in superior mesenteric artery isolated from rats.
Uma diminuição da disponibilidade do NO na vasculatura promove a progressão de doenças vasculares e as oximas representam um grupo de doadores de NO capaz de reestabelecer tal deficiência. Em anéis de artéria mesentérica superior isolada de rato, tanto as oximas não aromáticas: diacetilmonoxima e dimetilglioxima, quanto as oximas aromáticas: benzo
Publicado em: 2009
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14. Study of the active cardiovascular of a-terpineol in rats - in vivo and in vitro Experimental Models. / Estudo da atividade cardiovascular do a-terpineol em ratos : Abordagens in vivo e in vitro
The essential oils are volatiles organic constituents found in aromatic plants, which present several monoterpenes. a-terpineol is an important chemical constituent of the essential oil of many plants.. Studies have demonstrated some biologic activities such as antifungal and antispasmodic. In the present work the cardiovascular effects of a-terpineol were i
Publicado em: 2008
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15. Study of vasorelaxant effect of one pyrone obtained from Aniba panurensis in isolated superior mesenteric artery rat / Estudo do efeito vasorelaxante de uma pirona obtida de Aniba panurensis em artÃria mesentÃrica superior isolada de rato
6 - [(E) â styryl] â pyron â 2 - one (pyrone-198) is a natural styrylpyrone isolated from the ethanolic extract of the green fruits of Aniba panurensis (Lauraceae). The pyrones demonstrate a whole spectrum of bioactivity and have been shown to be antifungal, antibiotic, cytotoxic and phytotoxic. The aim of this study is to investigate the effects of this
Publicado em: 2007
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16. Angiotensin II induced venoconstriction in normotensive and hypertensive rats: study of action mechanisms, localization and expression of AT1 and AT2 receptors. / Venoconstrição induzida por angiotensina II em ratos normotensos e hipertensos: estudo de mecanismos de ação, localização e expressão de receptores AT1 e AT2.
In this study we have evaluated and characterized the effect of Ang II in the isolated perfused mesenteric venular bed (MVB) and portal vein rings (PVR) of SHR and wistar rats. Vascular reactivity to Ang II was studied in the absence and presence of different antagonists to elucidate the mechanisms involved in Ang II-induced venoconstriction. Our results sug
Publicado em: 2007
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17. SÃntese e caracterizaÃÃo de novos derivados mesoiÃnicos para aplicaÃÃo de Ãptica nÃo-linear e atividade biolÃgica
Mesoionic compounds constitute a group of heterocyclic betaines stabilized by delocalisation of electrons and charge, the synthesis of which has proven of great interest. This stemmed from (a) their wide range of biological activity with a considerable possibility of obtaining pharmaceuticals; (b) their special physical properties for non-linear optics appli
Publicado em: 2004
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18. Gender differences in vascular expression of endothelin and ET A/ET B receptors, but not in calcium handling mechanisms, in deoxycorticosterone acetate-salt hypertension
We determined if the increased vascular responsiveness to endothelin-1 (ET-1) observed in male, but not in female, DOCA-salt rats is associated with differential vascular mRNA expression of ET-1 and/or ET A/ET B receptors or with functional differences in Ca2+ handling mechanisms by vascular myocytes. Uninephrectomized male and female Wistar rats received DO
Brazilian Journal of Medical and Biological Research. Publicado em: 2002-09
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19. Cardiovascular effects induced by the aqueous fraction of the ethanol extract of the stem of Solanum stipulaceum in rats
The cardiovascular effects induced by the aqueous fraction of the ethanol extract of the stem (AFS) of Solanum stipulaceum Roem. & Schult were studied in rats. In non-anesthetized rats, AFS injections produced significant and dosedependent hypotension associated with increase in heart rate. In isolated rat superior mesenteric rings, AFS was able to antagoniz
Revista Brasileira de Farmacognosia. Publicado em: 2002
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20. Estudo farmacologico do óleo essencial do Croton nepetaefolius Baill sobre os musculos lisos traqueal e vascular e sobre as propriedades eletrofisiologicas de neuronios fasicos de ganglio celiaco / Pharmacological study of the essential oil of Croton nepetaefolius on both vascular and tracheal smooth muscle and on electrophysiological properties of celiac ganglion phasic neurones
Croton nepetaefolius is an aromatic bush found in brazilian Northeast region, called marmeleiro sabiá, and it is used in folk medicine as an antispasmodic and carminative agent. Its essential oil is comprised of 1,8-cineole, methyl-eugenol, xanthoxylin, terpineol and others constituents. Recent studies showed some pharmacological activities of the essential
Publicado em: 2002
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21. Role of store-operated Ca2+ entry in adenosine-induced vasodilatation of rat small mesenteric artery
Store-operated Ca2+ entry (SOCE) has recently been proposed to contribute to Ca2+ influx in vascular smooth muscle cells (VSMCs). Adenosine is known for its protective role against hypoxia and ischemia by increasing nutrient and oxygen supply through vasodilation. This study was designed to examine the hypothesis that SOCE have a functional role in adenosine
American Physiological Society.
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22. Mediation of excitatory neurotransmission by the release of ATP and noradrenaline in sheep mesenteric lymphatic vessels.
1. Spontaneous isometric contractions were measured in rings of sheep mesenteric lymphatics. Field stimulation at short pulse widths increased the frequency of spontaneous contractions and this response was blocked by 3 x 10(-7) M omega-conotoxin and by 10(-6) M guanethidine. 2. Rings that had been incubated with [3H]noradrenaline release 3H in response to f
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23. Noradrenaline contractions in rabbit mesenteric arteries skinned with saponin.
1. In rings of small rabbit mesenteric arteries, noradrenaline induced oscillatory contractions. After depolarization with potassium, which produced in this preparation only a transient contraction, the arteries responded to noradrenaline with tonic contraction. 2. Artery rings, skinned for 6 min with saponin (0.5 mg/ml.), were highly sensitive to calcium (h
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24. Endothelial dysfunction in a murine model of mild hyperhomocyst(e)inemia
Homocysteine is a risk factor for the development of atherosclerosis and its thrombotic complications. We have employed an animal model to explore the hypothesis that an increase in reactive oxygen species and a subsequent loss of nitric oxide bioactivity contribute to endothelial dysfunction in mild hyperhomocysteinemia. We examined endothelial function and
American Society for Clinical Investigation.