Navegando por Assunto "Plukenetia polyadenia"

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Acesso aberto (Open Access)
Análise nutricional e atividade antinociceptiva do óleo Plukenetia polyadenia
(Universidade Federal do Pará, 2013-05-27) ALBUQUERQUE, Thayana Lucy Freitas; BASTOS, Gilmara de Nazareth Tavares; http://lattes.cnpq.br/2487879058181806; NASCIMENTO, José Luiz Martins do; http://lattes.cnpq.br/7216249286784978
This study investigated the nutritional effects resulting from chronic oral administration of oil Plukenetia polyadenia in rats on weight, feed intake, blood lipid composition, and histology of the organs, and to investigate the toxicity and antinociceptive activity after administration of different dosages orally in mice. The nutritional analysis of food intake and weight showed that chronic administration of this oil did not interfere nutritionally in the homeostasis of these variables, regardless of the dosages used (100 and 200mg.kg/weight). The lipid fractions of blood as total cholesterol, LDL, HDL and triglycerides also are unchanged in the supplemented animals. Not found edema, cell death or cell inflammatory response in the liver, heart, lung, stomach, intestines, pancreas and chronic renal after supplementation in both dosages. In the writhing test induced by acetic acid, the oil administered orally (25, 50 and 100mg.kg/ weight) significantly reduced the number of writhes compared to the control. In the hot plate test, the treatment with oil at a dosage of 200mg.kg/weight induced no change in latency to thermal stimulus compared to the control. In the formalin test, oral treatment at doses of 50 and 100mg.kg/ weight showed a significant antinociceptive effect, reducing the time to lick only in the second phase (inflammatory). The oil in 200mg.kg/ weight dosage did not affect the behavioral activity of rats submitted to the open field test and showed no toxic effects. Our results demonstrated that Plukenetia polyadenia present antinociceptive activity without toxicicity.
Acesso aberto (Open Access)
Poderia um óleo atuar como analgésico opioide? oléo de Plukenetia polyadenia: elucidação do mecanismo de ação
(Universidade Federal do Pará, 2016-09-05) MOTA, Amanda Sodré; MAIA, Cristiane do Socorro Ferraz; http://lattes.cnpq.br/4835820645258101; BASTOS, Gilmara de Nazareth Tavares; http://lattes.cnpq.br/2487879058181806
The seed oil of Plukenetia polyadenia (Pp-oil) is used by the Amazon people against arthritis and rheumatism, spreading it in the arms and legs. The fatty acid composition, antinociceptive effect and toxicity of Pp-oil were investigated. Materials and methods: The Pp-oil was obtained by pressing and its antinociceptive activity was analyzed in models of nociception (acetic acid-induced abdominal writhing, hot plate and formalin tests) in mice and also mechanism of action was determined using acetic acid- indiced abdominal writing, open field, pole test and rotarod. Results: Pp-oil demonstrated a significant dose dependent antinociceptive effect (p< 0.05) in the chemical stimulation and at the second phase of formalin. However, the result from the hot plate test, open field, pole test and rotarod were not significant (p> 0.05), suggesting that Pp-oil has an analgesic activity, which is putative of peripheral origin. In the writhing test, the oil dosed at 25, 50 and 100 mg/kg reduced the abdominal writhes in a significant manner. In the hot plate test, the oil dosed at 200 mg/kg did not induced alterations in the latency time when compared to the control. At the dose of 100 mg/kg it did not show any difference in motor system proving that Pp-oil does not have any influence at central nervous system. In the formalin test, the oil dosed at 50 and 100 mg/kg reduced in a significant manner the second phase of the algic stimulus. Pp-oil at 100mg/kg did not show any alterations in motor system when analyzed with open field, pole test and rotarod (p>0,05), which corroborates with previous results that affirm Pp-oil has no participation in central nervous system. In addition, its antinociception was reversed by naloxone in evaluation of the mechanism of action. Conclusion: Pp-oil proved to have analgesic properties. Moreover, the results concerning mechanism suggest that opiod receptors are involved in the antinociceptive action of the Pp-oil using a peripheral pathway.