Oral administration of curcumin (curcuma Longa) can attenuate the neutrophil inflammatory response in zymosan-induced arthritis in rats

PURPOSE: To evaluate the effect of curcumin in the acute phase of zymosan-induced arthritis.METHODS: Twenty-eight male rats were subjected to intra-articular infiltration of zymosan of both knees and, in four the infiltration was made with saline. The animals were divided into five groups second received every six hours by gavage: corn oil by (positive and negative control); curcumin (100 mg/kg); prednisone 1 mg/kg/day; prednisone 8 mg/kg. All animals were sacrificed after six, 12, 24 and 48 hours of the infiltration. The knees were removed for evaluation of neutrophil infiltration. The number of neutrophils was counted by computer-assisted analysis of the images. The neutrophil infiltrate was stratified into four grades: 0 = normal; + = mild; ++/+++ = moderate; > ++++ = severe. The results were compared using the Mann-Whitney test and the variance by Kruskal-Wallis test adopting a significance level of 5% (p<0.05).RESULTS: Curcumin reduces inflammatory activity in the first six hours after zymosan-induced arthritis when compared to saline (p<0.01). This was also observed in animals subjected to administration of prednisone (1 mg/kg) and those treated with prednisone (8 mg/kg). Curcumin was more effective than lower doses of prednisone in the first six hours after induction of the arthritis. After 12, 24 and 48 hours, curcumin does not have the same anti-inflammatory effects when compared to prednisone. After 48 hours, prednisone is more effective than curcumin in reducing the inflammatory infiltrate regardless of the dose of prednisone used.CONCLUSION: Oral administration of curcumin reduces inflammation in the first six hours after experimentally zymosan-induced arthritis.To evaluate the effect of curcumin in the acute phase of zymosan-induced arthritis.METHODS: Twenty-eight male rats were subjected to intra-articular infiltration of zymosan of both knees and, in four the infiltration was made with saline. The animals were2911727734sem informaçãosem informaçãoLawrence, R.C., Felson, D.T., Helmick, C.G., Arnold, L.M., Choi, H., Deyo, R.A., Gabriel, S., Wolfe, F., National Arthritis Data Workgroup. Estimates of the prevalence of arthritis and other rheumatic conditions in the United States. 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Metodologia experimental para avaliação de custos de produção e utilização de biodiesel: estudo de caso de quatro ésteres metílicos e óleo diesel comercial

Considerando que o Brasil detém uma vasta gama de matérias-primas para produção de biodiesel, e também que há a possibilidade de produção em pequena escala, prima-se por estudos de cunho econômico a partir de metodologias de fácil execução. O objetivo do trabalho foi demonstrar uma metodologia e sua aplicação para avaliação dos custos inseridos dentro do processo produtivo e de utilização do biodiesel. A metodologia foi aplicada a biodieseis originários de óleo de soja, girassol, frango e sebo bovino, dos quais se avaliaram economicamente os custos fixos e variáveis para conversão química dos óleos e gorduras em ésteres metílicos, em uma planta de produção experimental. Os custos de produção para cada uma das quatro citadas são distintos em função do valor inicial por litro de cada uma. Também fora avaliado o custo específico e o consumo específico de cada um dos biodieseis, a fim de determinar a diferença em relação ao óleo diesel comercial. No estudo de caso, os resultados mostraram vantagens para o óleo diesel, tanto no custo quanto no consumo. Comparando-se os biodieseis, o de sebo bovino apresentou-se com o menor custo de produção e o menor consumo.Considering that Brazil has a wide range of raw materials for biodiesel production, and also the possibility of small scale production, there is a demand for economic methodology studies with easy implementation. The objective of this research was to demonstrate a methodology and its application to assess the costs within the production process and the biodiesel use. The methodology was applied to biodiesels originated from soybean oil, sunflower oil, chicken oil and beef tallow, which assessed the fixed and variable costs for chemical conversion of oils and fats into methyl esters in an experimental production plant. Production costs for each of the four mentioned esters are peculiar due to the initial value of each oil per liter. Also the specific cost and specific fuel consumption were evaluated for each biodiesel to determine the difference with the commercial diesel oil. The case study showed advantages for diesel oil, both in cost and consumption. Comparing the biodiesels, the beef tallow showed the lowest production costs and lower consumption

Temperatura e substrato para o teste de germinação de sementes de barbatimão ((Stryphnodendron adstringens (Mart.) Coville (Leguminosae))

As normas oficiais para análise de sementes não estabelecem critérios para a execução de testes de germinação da maioria das espécies florestais. Assim, o objetivo deste trabalho foi a determinação do substrato, da temperatura e da necessidade de superação da dormência das sementes para o teste de germinação de Stryphnodendron adstringens. Foram avaliados o tratamento de escarificação com ácido sulfúrico por 60 min, os substratos vermiculita, rolo de papel, areia e solo e as temperaturas constantes de 20, 25, 30 e 35 ºC e alternadas de 15-35 ºC e 20-30 ºC, utilizando-se a primeira contagem de germinação (7 dias) e a porcentagem de plântulas normais, anormais, sementes mortas e dormentes (42º dia após a semeadura) com quatro repetições de 50 sementes. As sementes de S. adstringens devem ser submetidas ao teste de germinação, após superação da dormência, em substrato papel e nas temperaturas constantes de 25, 30 ou 35 ºC ou alternadas de 20-30 ºC.The official rules for seed testing don't establish criterions for accomplishment of germination test for greater number of forest species. Thus, the aim of this work was to define substrate, temperature and method for removing hard seededness for germination test of Stryphnodendron adstringens. They were studied: acid scarification with sulphuric acid for 60 minutes, substrates: vermiculita, rolled towel paper, sand and soil, and temperatures: constant, 20, 25, 30 and 35 ºC, and alternating, 15-35 ºC and 20-30 ºC. They were evalueted by first counting of the test (percentage of normal seedlings at 7 days after sowing), and the percentages of normal and abnormal seedlings, dormant and dead seeds (42 days after sowing), with four replications of 50 seeds. Seeds with hardness removed must be used to evaluate the germination of S. adstringens, in paper substrate and with constant temperature of 25, 30 or 35 ºC or alternating of 20-30 ºC

Ankhd1 Silencing Inhibits Stathmin 1 Activity, Cell Proliferation And Migration Of Leukemia Cells

ANKHD1 is highly expressed in human acute leukemia cells and potentially regulates multiple cellular functions through its ankyrin-repeat domains. In order to identify interaction partners of the ANKHD1 protein and its role in leukemia cells, we performed a yeast two-hybrid system screen and identified SIVA, a cellular protein known to be involved in proapoptotic signaling pathways. The interaction between ANKHD1 and SIVA was confirmed by co-imunoprecipitation assays. Using human leukemia cell models and lentivirus-mediated shRNA approaches, we showed that ANKHD1 and SIVA proteins have opposing effects. While it is known that SIVA silencing promotes Stathmin 1 activation, increased cell migration and xenograft tumor growth, we showed that ANKHD1 silencing leads to Stathmin 1 inactivation, reduced cell migration and xenograft tumor growth, likely through the inhibition of SIVA/Stathmin 1 association. In addition, we observed that ANKHD1 knockdown decreases cell proliferation, without modulating apoptosis of leukemia cells, while SIVA has a proapoptotic function in U937 cells, but does not modulate proliferation in vitro. Results indicate that ANKHD1 binds to SIVA and has an important role in inducing leukemia cell proliferation and migration via the Stathmin 1 pathway. ANKHD1 may be an oncogene and participate in the leukemia cell phenotype.18533583593Stone, R.M., O'Donnell, M.R., Sekeres, M.A., Acute myeloid leukemia, Hematology (2004) Am. Soc. Hematol. Educ. 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