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Id: lil-751378
Autor: Bruder-Nascimento, Thiago; Silva, Samuel T; Boer, Patrícia A; Cordellini, Sandra.
Título: Effects of exercise training on stress-induced vascular reactivity alterations: role of nitric oxide and prostanoids
Fonte: Braz. j. phys. ther. (Impr.) = Rev. bras. fisioter;19(3):177-185, May-Jun/2015. tab, graf.
Idioma: en.
Projeto: Fundação de Amparo à Pesquisa do Estado de São Paulo.
Resumo: Background: Physical exercise may modify biologic stress responses. Objective: To investigate the impact of exercise training on vascular alterations induced by acute stress, focusing on nitric oxide and cyclooxygenase pathways. Method: Wistar rats were separated into: sedentary, trained (60-min swimming, 5 days/week during 8 weeks, carrying a 5% body-weight load), stressed (2 h-immobilization), and trained/stressed. Response curves for noradrenaline, in the absence and presence of L-NAME or indomethacin, were obtained in intact and denuded aortas (n=7-10). Results: None of the procedures altered the denuded aorta reactivity. Intact aortas from stressed, trained, and trained/stressed rats showed similar reduction in noradrenaline maximal responses (sedentary 3.54±0.15, stressed 2.80±0.10*, trained 2.82±0.11*, trained/stressed 2.97± 0.21*, *P<0.05 relate to sedentary). Endothelium removal and L-NAME abolished this hyporeactivity in all experimental groups, except in trained/stressed rats that showed a partial aorta reactivity recovery in L-NAME presence (L-NAME: sedentary 5.23±0,26#, stressed 5.55±0.38#, trained 5.28±0.30#, trained/stressed 4.42±0.41, #P<0.05 related to trained/stressed). Indomethacin determined a decrease in sensitivity (EC50) in intact aortas of trained rats without abolishing the aortal hyporeactivity in trained, stressed, and trained/stressed rats. Conclusions: Exercise-induced vascular adaptive response involved an increase in endothelial vasodilator prostaglandins and nitric oxide. Stress-induced vascular adaptive response involved an increase in endothelial nitric oxide. Beside the involvement of the endothelial nitric oxide pathway, the vascular response of trained/stressed rats involved an additional mechanism yet to be elucidated. These findings advance on the understanding of the vascular processes after exercise and stress alone and in combination. .
Responsável: BR1.1 - BIREME


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Id: lil-795992
Autor: Jerônimo, Márcio Sousa; Barros, Adria do Prado; MoritaI, Vinícius Elord Zen; Alves, Erika Oliveira; Souza, Nathalia Lobão Barroso de; Almeida, Rosane Mansan de; Nóbrega, Yanna Karla Medeiros; Cavalcanti Neto, Florêncio Figueiredo; Amorin, Rivadávio; Borin, Maria de Fátima; Bocca, Anamélia Lorenzetti.
Título: Oral or topical administration of L-arginine changes the expression of TGF and iNOS and results in early wounds healing
Fonte: Acta cir. bras;31(9):586-596, Sept. 2016. tab, graf.
Idioma: en.
Projeto: CAPES, CNPq, FINATEC, DPP/UnB, and FAPDF.
Resumo: ABSTRACT PURPOSE: To evaluate the contribution of L-arginine oral or topical rout of administration in the surgical wound healing process. METHODS: L-arginine was orally or topically administrated to mice after a laparotomy model procedure. The wounds were analyzed to evaluate the granulation tissue by HE analysis, collagen deposition, iNOS and cytokines production by immunochemisyry on wound progress. Mice used in this model were healthy, immunosupressed or diabetic and all of them were treated with different concentration of L-arginine and rout of administration. RESULTS: Suggested that groups treated with L-arginine orally or topically improved wound repair when compared with non-treatad mice. L- arginine treatment stimulated TGF-β and restricted NO production leading to a mild Th1 response and collagen deposition in injured area, when it was orally administrated. Topical administration decreased IL-8 and CCR1 expression by wound cells but did not interfere with TNF-α and IL-10 production, ratifying the decrease of inflammatory response, the oral administration however, presented a higher iNOS and TGF-β expression then. L-arginine treatment also improved the improved the wound healing in immunosupressed or diabetic mice. CONCLUSION: L-arginine administrated orally or topically can be considered an important factor in the recuperation of tissues.
Responsável: BR1.1 - BIREME


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Costa, Waldemar Silva
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Id: biblio-827653
Autor: Pinto, Flavia Cristina Morone; Campos-Silva, Pamella; Souza, Diogo Benchimol de; Costa, Waldemar Silva; Sampaio, Francisco José Barcellos.
Título: Nutritional supplementation with arginine protects radiation-induced effects. An experimental study
Fonte: Acta cir. bras;31(10):650-654, Oct. 2016. tab, graf.
Idioma: en.
Resumo: ABSTRACT PURPOSE: To investigate the protective effect of L-arginine on the prostate (nonneoplasic) of rats with radiation-induced injury. METHODS: Twenty-nine Wistar rats, male adult, allocated into three groups: Control group (C) was not exposed to irradiation (n=10); Radiated group (R) had undergone pelvic irradiation (n=10); Supplemented and radiated group (R+S) had undergone pelvic irradiation plus L-arginine supplementation (n=9). The animals were observed for signs of toxicity. After euthanization, the prostate was dissected under magnification and stained by hematoxylin and eosin to study acinar structures and stained with Picrosirius red for collagen analysis. RESULTS: After radiation exposure, all animals presented diarrhea, but supplementation with L-arginine reduced this effect. The weight gain in the R+S group was significantly higher than in the C and R groups. In the R+S group the collagen density and the prostate acinar area was similar to the R and C groups. Epithelial height was significantly reduced in group R compared with group C (p<0.0001). When comparing the group R+S with R, a statistical difference was observed to be present (p<0.0001). CONCLUSIONS: Pelvic radiation promotes systemic effects and some structural modifications in the ventral prostate of rats. These modifications can be prevented by oral supplementation with L-arginine.
Responsável: BR1.1 - BIREME


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Id: biblio-1038412 LILACS-Express
Autor: Anon.
Título: Resúmenes de trabajos seleccionados publicados en las revistas de las Sociedades de Pediatría del Cono Sur 2016 / Selected abstracts of papers published in the journals of the Pediatric Societies of Southern Countries 2016
Fonte: Arch. argent. pediatr;116(1):173-182, feb. 2018.
Idioma: es.
Responsável: AR94.1 - Centro de Información Pediatrica


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Id: lil-777089
Autor: Arslan, Aynur; Kuyrukluyildiz, Ufuk; Binici, Orhan; Cetin, Nihal; Balci, Mecdi Gurhan; Kuzucu, Mehmet; Yilmaz, Adnan; Altuner, Durdu; Coban, Taha Abdulkadir.
Título: Can thiamine pyrophosphate prevent desflurane induced hepatotoxicity in rats?
Fonte: Acta cir. bras;31(3):168-175, Mar. 2016. graf.
Idioma: en.
Projeto: Erzincan University Scientific Research Projects Department.
Resumo: ABSTRACT PURPOSE : To investigate the effects of thiamine pyrophosphate (TPP) against desflurane induced hepatotoxicity. METHODS : Thirty experimental animals were divided into groups as healthy (HG), desflurane control (DCG) , TPP and desflurane group (TDG). 20 mg/kg TPP was injected to intraperitoneally TDG. After one hour of TPP administration, desflurane was applied for two hours. After 24 hours, liver tissues of the animals killed with decapitation were removed. The oxidant/antioxidant levels and ALT, AST and LDH activities were measured. The histopathological examinations were performed in the liver tissues for all rats. RESULTS : Notwithstanding the levels of oxidants and liver enzymes were significantly increased (p<0.0001), antioxidant levels were significantly decreased in DCG (p<0.0001). On contrary to the antioxidant parameters were increased (p<0.05) the oxidant parameters and liver enzymes were decreased in TDG (p<0.0001). Whereas multiple prominent, congestion, hemorrhage and dilatation were observed in sinusoids and lymphocyte-rich inflammation results in the centrilobular and portal areas of liver tissue in DCG, these findings were observed less frequently in TDG. CONCLUSİON : Thiamine pyrophosphate prevented liver oxidative damage induced with desflurane and may be useful in prophylaxis of desflurane induced hepatotoxicity.
Responsável: BR1.1 - BIREME


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Id: lil-779765
Autor: Evora, Paulo Roberto Barbosa; Silva Júnior, Orlando de Castro e.
Título: Vasoplegic endothelial dysfunction in orthotopic liver transplantation
Fonte: Acta cir. bras;31(supl.1):2-4, 2016.
Idioma: en.
Responsável: BR1.1 - BIREME


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Id: biblio-1048582
Autor: Gorni, Pedro Henrique; Pacheco, Ana Cláudia; Silva, Jonathan Fogaça Albuquerque; Moreli, Ronaldo Rossetti; Spera, Kamille Daleck; Silva, Regildo Márcio Gonçalves.
Título: Plant elicitation with salicylic acid increases bioactive compounds content and antioxidant activity in the infusion of Achillea millefolium L / Elicitação de plantas de achillea millefolium l. com ácido salicílico aumenta o teor de compostos ativos e a atividade antioxidante da infusão
Fonte: Biosci. j. (Online);35(1):289-295, jan./fev. 2019. tab.
Idioma: en.
Resumo: This study evaluated the total polyphenols content and the antioxidant activity of the infusion prepared with leaves from Achillea millefolium L. plants treated with salicylic acid (SA). Field cultivated plants received SA foliar applications (T1: control; T2: 1.0 mmol L-1 applications at 20, 60 and 100 days after planting - DAP and T3: 1.0 mmol L-1 applications at 100 DAP during three days). The infusions from SA treated plants showed higher levels of total polyphenols and flavonoids compared to the control one. T2 and T3 infusions showed increases in the antioxidant activity by 2,2-diphenyl-1-picrylhydrazyl (DPPH), nitric oxide (NO) and ferric-reducing antioxidant power (FRAP) tests. However, only T2 treated plants had higher antioxidant activity by inhibition of lipid peroxidation (TBARS). It was concluded that elicitation of A. millefolium plants with SA can be considered an adequate strategy to increase the production of bioactive compounds and the antioxidant capacity of infusions.

Este estudo avaliou o teor total de polifenóis e a atividade antioxidante da infusão preparada com folhas de plantas de Achillea millefolium L. tratadas com ácido salicílico (AS). As plantas cultivadas em campo receberam aplicações foliares de AS (T1 ­ controle; T2 - aplicação de 1,0 mmol L-1aos 20, 60 e 100 dias após o plantio (DAP) e T3 ­ aplicações de 1,0 mmol L-1 aos 100 DAP durante três dias consecutivos). As infusões de plantas tratadas com AS apresentaram níveis mais elevados de polifenóis totais e flavonóides em comparação ao controle. As infusões T2 e T3 mostraram aumentos na atividade antioxidante por meio de testes de 2,2-diphenyl-1-picrylhydrazyl(DPPH), óxido nítrico (NO) e poder antioxidante de redução férrica (FRAP). No entanto, apenas plantas do tratamento T2 apresentaram maior atividade antioxidante por inibição da peroxidação lipídica (TBARS). Concluiu-se que a elicitação de plantas de A. millefolium com AS pode ser considerada uma estratégia adequada para aumentar a produção de compostos bioativos e a capacidade antioxidante das infusões.
Responsável: BR396.1 - Biblioteca Central


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Id: lil-512198 LILACS-Express
Autor: Girardi, José Marcos; Girardi, Flávia Araújo; Peters, Vera Maria.
Título: Endotélio vascular e efeitos das Estatinas / Vascular Endothelium and Effects of the Statins
Fonte: HU rev;32(1), 10/04/2006.
Idioma: pt.
Resumo: O endotélio vascular é um tecido endócrino dinâmico que regula a contratilidade, atividades mitogênicas e secretórias na parede dos vasos e homeostase no lúmen vascular. Os fatores de risco para doença cardiovascular, como hipertensão e hipercolesterolemia, pioram a função endotelial, promovendo a aterosclerose. Várias são as conseqüências potenciais da disfunção endotelial, incluindo isquemia miocárdica e trombose, causando infarto do miocárdio. Estudos sugerem que medicamentos hipocolesterolêmicos reduzem isquemia miocárdica em pacientes com coronariopatia e, em especial, as estatinas diminuem os eventos cardiovasculares, em parte por melhora da função endotelial. Independente desta capacidade de redução do colesterol, existem evidências de efeitos pleiotróficos destes fármacos, tais como antioxidantes e antiinflamatórios. As estatinas parecem restaurar ou melhorar a função endotelial decorrente de aumento da biodisponibilidade do óxido nítrico, promovendo re-endotelização,redução do estresse oxidativo e inibição na resposta inflamatória.

The vascular endothelium is a dynamic endocrine organ that regulates contractile, secretory,and mitogenic activities in the vessel wall, and hemostatic processes within the vascular lumen. Risk factors for cardiovascular disease, such as cigarette smoking, hypertension, and elevated serum lipid levels, impair endothelial function and lead to the development of atherosclerotic vessels. The potential consequences of endothelial dysfunction are numerous, including myocardial ischemia; plaque rupture and thrombosis, causing unstable angina or myocardial infarction. Several studies suggest that lipid-lowering therapies reduce myocardia ischemia in patients with coronary artery disease. Recent studies suggest that statins reduce cardiovascular events, in part by improving endothelial function. There is increasing evidence, however, that statins may also exert effects beyond cholesterol lowering. Indeed, many of these cholesterol-independent or ?pleiotropic? vascular effects of statins appear to involve restoration or improvement of endothelial function through increased bioavailability of nitric oxide, with promotion of re-endothelialization, reduction of oxidative stress, and inhibition of inflammatory responses.
Responsável: BR378.1 - Biblioteca Central


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Id: lil-743807
Autor: Bohlouli, Somayeh; Khazaei, Mozafar; Rabzia, Arezou; Khazaei, Mohammad Rasool; Sadeghi, Ehsan.
Título: Adiponectin effect on nitric oxide secretion by normal and endometriotic human endometrial stromal cells: in vitro study / Efecto de la adiponectica sobre la secreción de óxido nítrico por células estromales de endometrio humano, normales y con endometriosis: estudio in vitro
Fonte: Int. j. morphol;33(1):337-341, Mar. 2015. ilus.
Idioma: en.
Projeto: Islamic Azad University. Kermanshah Branch.
Resumo: Endometriosis is an estrogen-dependent disease in reproductive age women. Adiponectin and Nitric oxide (NO) have an important role in physiologic functions especially in human reproductive system. Levels of NO increased in the endometriosis patients but serum adiponectin levels decreased in woman with endometriosis. The aim of this study was to determine adiponectin effect on nitric oxide secretion by cultured normal and endometriotic human endometrial stromal cells. In this experimental study, normal (n= 10) and endometriotic endometrial biopsies (n= 10) were taken in sterile condition. Stromal cells isolated and cultured in in DMEM/ F12 medium and treated with adiponectin concentrations (0, 10, 100, and 200 ng/ml) for 24 and 48 hours. NO assay was done on their supernatants by Greiss method. Data was analyzed by one way ANOVA and p<0.05 was considered significant. There was significant difference between endometriosis groups in NO secretion in all dose of adiponectin and time (p<0.05). In normal groups there was significant difference in 48 hours (p<0.05) but no significant change in 24 hours (p>0.05). Adiponectin effects nitric oxide secretion of cultured human endometriotic stromal cells.

La endometriosis es una enfermedad dependiente de estrógenos que se presenta en mujeres en edad reproductiva. La adiponectina y el óxido nítrico (ON) tienen un papel importante en las funciones fisiológicas, especialmente en el sistema reproductivo humano. Los niveles de ON aumentan en los pacientes con endometriosis, pero los niveles de adiponectina en suero disminuyen. El objetivo fue determinar el efecto de la adiponectina sobre la secreción de ON por las células estromales de endometrio humano, tanto normales como con endometriosis, en medio de cultivo. En este estudio experimental, las células estromales de endometrio normales (n= 10) y las biopsias de endometrio con endometriosis (n= 10) se tomaron en condiciones de esterilidad. Las células estromales fueron aisladas y cultivadas en un medio DMEM/F12, y se sometieron a distintas concentraciones de adiponectina (0, 10, 100, y 200 ng/ml) durante 24 y 48 horas. El ensayo con ON se realizó a los sobrenadantes obtenidos por el método de Greiss. Los datos recolectados fueron analizados por ANOVA de una vía y un valor p<0,05 se consideró significativo. Entre los grupos con endometriosis, en referencia a la secreción de ON, no hubo diferencia significativa en todas las dosis de adiponectina y los tiempos estipulados (p<0,05). En los grupos normales, hubo diferencia significativa a las 48 horas (p<0,05), pero ningún cambio significativo a las 24 horas (p>0,05). La adiponectina tiene efectos sobre la secreción de óxido nítrico por las células estromales endometriales humanas en cultivo.
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-915411
Autor: Sánchez-Recillas, Amanda; Araujo-León, Jesus A; Rivero-Medina, Laura; Moreno-Diaz, Hermenegilda; Antonio-de-la-Cruz, Ana S; Ortiz-Andrade, Rolffy.
Título: Vasorelaxant activity of Euphorbia furcillata Kunth mainly by activation of NO/cGMP pathway and calcium channel blockade / Actividad vasorrelajante de Euphorbia furcillata Kunth principalmente por activación de la vía NO/GMPc y bloqueo de canales de calcio]
Fonte: Bol. latinoam. Caribe plantas med. aromát;17(3):310-323, mayo 2018. ilus, tab.
Idioma: en.
Projeto: CONACYT. Evaluación farmacológica ex vivo y estudio toxicológico de plantas medicinales de Yucatán usando musculatura lisa como modelo experimental (SISTPROY: FQUI2006-0007).
Resumo: The aim of current study was to determinate ex vivo and chromatographic fingerprint by HPLC of four extracts of Euphorbia furcillata K. Ethyl acetate extract of Euphorbia furcillata (EaEEf) was the most effective and potent extract (Emax=98.69±1.24%) and its effect was partially endothelium-dependent. Functional vasorelaxant mechanism of action of EaEEf was determinate, EaEEf showed efficient relaxation of KCl [80 mM]-induced contraction and norepinephrine and CaCl2 contraction curves showed diminution of maximal contraction in the presence of EAEEf and EaEEf-relaxation curve was shifted to the right in the presence of L-NAME (nitric oxide synthase inhibitor) and ODQ (guanylate cyclase inhibitor). Chromatographic fingerprints analysis suggests presence of diterpenoid such as abietane, tigliane, and ingenane skeletons. Our experiments suggest the EaEEf vasorelaxant activity could be attributed to diterpenoid molecules whose mechanism involves nitric oxide production and calcium channel blockade.

Se determinó el efecto vasorrelajante ex vivo y los perfiles cromatográficos mediante HPLC de cuatro extractos de Euphorbia furcillata K.. El extracto de acetato de etilo de E. furcillata (EaEEf) fue el más eficaz y potente en la contracción inducida por norepinefrina (Emax=98.69±1.24%) y el efecto fue parcialmente dependiente del endotelio vascular. Se determinó el mecanismo de acción vasorrelajante para EaEEf, este mostró ser eficaz sobre la contracción inducida por KCl [80 mM] y la curva de contracción en respuesta a norepinefrina y CaCl2 en presencia de EaEEf mostró disminución en la contracción máxima, mientras que la curva de relajación de EaEEf en presencia de L-NAME (inhibidor de óxido nítrico sintasa) y ODQ (inhibidor de guanilato ciclasa) se desplazó hacia la derecha. El análisis cromatográfico de EaEEf sugiere la presencia de moléculas diterpenoides como abietano, tigliano y esqueletos de ingenano. Nuestros resultados sugieren que el efecto vasorrelajante de EaEEf podría atribuirse a moléculas diterpenoides, cuyo mecanismo de acción involucra la producción de óxido nítrico y bloqueo de canales de calcio.
Responsável: CL1.1 - Biblioteca Central



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