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1.
Rev. para. med ; 26(3)jul.-set. 2012. ilus
Article in Portuguese | LILACS-Express | LILACS | ID: lil-663165

ABSTRACT

Objetivo: verificar os efeitos do óleo de copaíba por via intravaginal no tumor de Walker 256inoculado na vagina e útero de ratas. Método: o tumor de Walker 256 foi inoculado na vagina eútero de 20 ratas, e estas distribuídas em dois grupos (n=10), no grupo controle (GC) os animaisforam tratados com água destilada intravaginal na dose de 0,3mL e o grupo copaíba (GCO),tratados com óleo de copaíba na dose de 0,3mL intravaginal. Analisou-se a variação de peso doanimal, peso e volume tumoral, potencial de inibição (PI), além da análise histológica da vagina,útero e reto dos animais. Resultados: a média da variação de peso no grupo controle foi 11,44±8,03g e no grupo copaíba 10,88 ±3,48g, não houve diferença estatisticamente significante(p=0,83). No grupo controle o peso médio do tumor foi de 2,4 ±1,22 g e o volume de 2,52 ±1,41mL e no grupo copaíba o peso médio de 2,31 ±0,88g e o volume médio de 2,36 ±1.13 mL. Opotencial de inibição do óleo de copaíba por via intravaginal foi de 4,74%. Não houve diferençaem relação ao estudo histológico. Conclusão: o óleo de copaíba por via intravaginal nãoapresentou efeitos sobre o tumor de Walker 256, inoculado na vagina e útero de ratas, emrelação ao peso do animal, peso e volume tumoral e características histológicas


Objective: Evaluate the effects of copaiba oil intravaginally on the Walker 256 tumorinoculated into the vagina and uterus of rats. Methods: Was inoculated Walker 256 tumor in thevagina and uterus of 20 rats, they were divided into two groups (n = 10) in control groupanimals were treated intravaginally with distilled water at a dose of 0.3 ml and the groupcopaiba, the animals was treated with copaiba oil at a dose of 0.3 ml intravaginally. Wasanalyzed the variation of body weight, and tumor?s volume and weight and potential forinhibition of the oil. Results: The mean weight change in the control group was 11.44 ± 8.03 gand group copaiba 10.88 ± 3.48 g, there was no statistical difference (p = 0.83). In the controlgroup the mean tumor weight was 2.4 ± 1.22g and the volume of 2.52 ± 1.41 mL in groupcopaiba the average weight was 2.31 ± 0.88g and the mean volume was 2.36 ± 1.13 mL. Thepotential inhibition of copaiba oil intravaginally was 4.74%. Conclusion: The copaiba oilintravaginally had no effect on the Walker 256 tumor inoculated into the vagina and uterus ofrats, relative to the weight of the animal and the tumor volume and weight, and histologycalcaracteristy.

2.
Acta cir. bras ; 23(1): 84-92, Jan.-Feb. 2008. ilus, graf
Article in English | LILACS | ID: lil-474145

ABSTRACT

PURPOSE: The objective of this study was to develop a rat lung tumor model for anticancer drug testing. METHODS: Sixty-two female Wistar rats weighing 208 ± 20 g were anesthetized intraperitoneally with 2.5 percent tribromoethanol (1 ml/100 g live weight), tracheotomized and intubated with an ultrafine catheter for inoculation with Walker's tumor cells. In the first step of the experiment, a technique was established for intrabronchial implantation of 10(5) to 5×10(5) tumor cells, and the tumor take rate was determined. The second stage consisted of determining tumor volume, correlating findings from high-resolution computed tomography (HRCT) with findings from necropsia and determining time of survival. RESULTS: The tumor take rate was 94.7 percent for implants with 4×10(5) tumor cells, HRCT and necropsia findings matched closely (r=0.953; p<0.0001), the median time of survival was 11 days, and surgical mortality was 4.8 percent. CONCLUSION: The present rat lung tumor model was shown to be feasible: the take rate was high, surgical mortality was negligible and the procedure was simple to perform and easily reproduced. HRCT was found to be a highly accurate tool for tumor diagnosis, localization and measurement and may be recommended for monitoring tumor growth in this model.


OBJETIVO: O objetivo foi desenvolver um modelo de tumor de pulmão em rato que permita o teste de fármacos no tratamento deste câncer. MÉTODOS: Sessenta e dois ratos Wistar fêmeas, peso médio de 208±20 g, foram anestesiados com tribromo-etanol 2,5 por cento IP (1ml/100g de rato), traqueostomizados e intubados com cateter ultrafino para injetar células do tumor de Walker. Na 1ª etapa, estabeleceu-se a técnica do implante de células tumorais por via intrabrônquica e o índice de pega tumoral, usando-se de 10(5) a 5×10(5) células. Na 2ª, avaliou-se o volume tumoral e a correlação dos achados obtidos na tomografia computadorizada de alta resolução (TCAR) de tórax com os da necropsia e verificou-se a sobrevida. RESULTADOS: O índice de pega foi de 94,7, com o implante de 4×10(5) células do tumor; as medidas do tumor feitas na TCAR e comparadas com as da necropsia foram semelhantes (r=0, 953, p<0,0001); a sobrevida mediana foi de 11 dias; e a mortalidade cirúrgica de 4,8 por cento. CONCLUSÃO: O modelo mostrou-se viável, com alto índice de pega, mortalidade cirúrgica desprezível, de execução simples e fácil reprodutibilidade. A TCAR revelou alta acurácia no diagnóstico, localização e mensuração das lesões tumorais, credenciando-se para a monitorização de crescimento tumoral nesse modelo.


Subject(s)
Animals , Female , Rats , /pathology , Lung Neoplasms/pathology , Disease Models, Animal , Linear Models , Lung Neoplasms/secondary , Tumor Cells, Cultured , Tomography, X-Ray Computed/methods , Xenograft Model Antitumor Assays/methods
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