88 resultados para In vitro cellular models
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Pós-graduação em Medicina Veterinária - FMVZ
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Pós-graduação em Biopatologia Bucal - ICT
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Pós-graduação em Medicina Veterinária - FMVZ
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Pós-graduação em Odontologia - FOAR
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Este trabalho avaliou a qualidade das adaptações cervicais de coroas totais metálicas, tendo como fonte de variação: a) o término do ombro cervical do preparo - biselado, inclinado em 1350; reto em 900, chanfro e gume de faca; b) o alívio ou não das superfícies internas das coroas; e, c) os tipos de agente de cimentação permanente, cimentos - fosfato de zinco Harvard; ionômero de vidro Ketac-Cem, policarboxilato de zinco Durelon e resinoso Panavia Ex. Inicialmente, foram confeccionados corpos-de-prova em modelos-padrão de aço inoxidável usinado, de acordo com o tipo de preparo dos términos cervicais experimentais. As cápsulas metálicas de aço inoxidável preparadas, tendo ou não alívio da superfície interna de 30 micrometros até a distância de 0,5 mm do limite do término cervical, justapunham-se precisamente e formavam um conjunto com adaptação e assentamento exatos. Estas foram cimentadas nos corpos-de-prova com os diferentes agentes cimentantes, os quais foram manipulados de acordo com as instruções dos fabricantes. Desenvolveram-se metodologias de reaproveitamento dos corpos-de-prova, estabilidade das cápsulas impedindo seu deslocamento durante a tomada das medidas e mensuração precisa. Concluiu-se que: a) as melhores médias de adaptações cervicais, semelhantes entre si, foram obtidas em modelos-padrão com ombros: lâmina de faca, ombro inclinado em 1350 e chanfro; b) as piores médias de adaptações cervicais, semelhantes entre si, foram obtidas em modelos-padrão com ombros reto em 900 e degrau em 900 com bisel de 450; c) houve melhora significativa na adaptação quando cápsulas metálicas foram cimentadas com alívio de sua superfície interna; d) os cimentos...(Resumo completo, clicar acesso eletrônico abaixo)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Experimental models composed by human and animal cell lines are simplified and informative, allowing them to be widely used for biomedical research. Most laboratories that use in vitro cultivated cells maintain a variation of cell lines stored and cultivated. Therefore, misidentification and cross-contamination events can happen during cell lines handling. This problem can generate a repertoire of dubious results and papers, which may prejudice biomedical research. Recently it was created the International Cell Line Authentication Committee (ICLAC), which aims to spread knowledge about cross-contamination and misidentification of in vitro cell lines. Despite of the efforts spent trying to aware scientific community about the importance of the correct identification of cells, the number of papers based on misidentified cell lines it´s still worrying, compromising the reliability of out coming results and conclusions regarding them. The present study aims to analyze and discuss the main advantages and limitations of eukaryote in vitro cell lines use, characterizing the cell lines authentication problems. Therefore, compilation and critical analyses of literature data was realized, aiming to improve the understanding about this subject. Based on information about 445 cell lines with issues published by ICLAC it´s clear that contamination in human cell lines represented 89,2 % of mentioned problems. HeLa cell line was the responsible for most contamination, especially in 92 normal tissue cell lines, representing 44,6% of the contamination. These results reinforce the importance of periodic maintenance of cell lines cultures by labs and implementation of authentication methods as polymorphic STRs, besides obtaining cell lines from reliable sources and cell banks
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A monoclonal antibody (mAb) is an important tool in medical biotechnology and the production of biopharmaceuticals, especially for disease diagnosis and treatment of infections, because the antibodies have a significant advantage over chemical agents used in conventional therapies . The last thirty years the technology of production of monoclonal antibodies developed mainly the technique of obtaining in vitro, but also of their production is laborious, the cost is high. A major element of the high cost of production is the fact that the long-term culture consumes a large amount of imported inputs with high added value. A major contribution of this work is to promote cell growth more quickly and efficiently. Currently, a great race to discover new technologies and techniques to synthesize new antibodies and significantly increase the production of murine mAbs. New technologies such as laser and LED are innovations and widespread in modern life, so much so that its use has proliferated worldwide, primarily in the medical field. Recent studies show a series of results from the influence of the LED light in biological tissues such as: increasing the rate of cell proliferation, increased production rate of fibroblasts, increasing the rate of synthesis of RNA and DNA synthesis of ATP, etc. To assess the contribution of the LED in the culture of Myeloma NS1murino compared to the standard procedure. - NS1 cells were provided and followed the criteria of culture medium of the Laboratory of Cellular Engineering Center of Botucatu (POPs). The same amount of cells was grown in bottles of 25 cm2 polystyrene Tissue Culture Treated, specifically marked and kept in special medium RPMI 1640 Gibco BRL supplemented with fetal bovine serum 10%, essential amino acids and non-essential, glucose, insulin and antibiotics. It was used in LEDs Cromatek wavelength of 630nm, 475nm and 530nm. The groups were... (Complete abstract click electronic access below)